智能云台音箱

一种硫化型加氢催化剂及其制备方法

The sulfurizing hydrogenation catalyst preparing process is mainly to introduce the precursor of IVB metal Mo and W with soluble thiomolybdate and thiotungstate solution into the interval of hydrogenating catalyst, so as to prepare sulfurizing hydrogenation catalyst with loaded Mo, W, Co and Ni. The said method is suitable for the preparation or all kinds of petroleum fraction hydrogenating catalyst, and is simpler than other external sulfurizing method, and the prepared catalyst has hydrogenating activity reaching or even higher than that internally sulfruizing catalyst.

Whole-cell utilization method of beer yeast as well as product and application of whole-cell utilization method

The invention discloses a beer yeast whole-cell utilization method and a product and application thereof, and relates to the technical field of bioengineering, and the method comprises the following steps: pretreatment, yeast wall breaking, extraction of yeast nucleotide from an endolysate supernatant system, and simultaneous extraction of glucan, mannan oligosaccharide and other zymosan products from a precipitation system. The zymosan and the yeast nucleotide obtained by the method can be used as food additives and flavoring substances. According to the method, multiple zymosan and yeast nucleotide products are simultaneously separated and extracted in one technological process by using the eutectic solvent, and the yeast cell wall polysaccharide is extracted in a graded manner at normal temperature by using the eutectic solvent, so that the use amount of alcohol is reduced, and the risk in the alcohol precipitation separation process in industrial production can be reduced; the eutectic ...

PULSE-BASED NEURAL CIRCUIT

A pulse-based neural circuit comprising: a pulse generation circuit and a membrane potential reassignment circuit. The pulse generation circuit, together with a current absolute value circuit and a current mirror connected to an operational transconductance amplifier, are used for simulating, via the operational transconductance amplifier, a first capacitance Cv of a membrane potential and a second capacitance Cu of a membrane recovery potential, which are constructed for simulating a neural pulse oscillation. The membrane potential reassignment circuit connected to the pulse generation circuit, and a voltage comparator and a switching circuit realized by using the operational transconductance amplifier, are constructed for membrane potential reassignment. The neural pulse circuit can simplify the realization of a circuit and improve the integration of the circuit, and to better simulate the piecewise linear Izhikevich model under the conditions of low voltage and low power consumption.

一种可用于固定床加氢的骨架金属催化剂及其制备方法

The invention is a kind of frame metal catalyst for fixed bed hydrogen addition. The character lies in: the catalyst is made up of aluminium and copper or the metal powder of VIII in element period table. It uses organic polymer as adhesive and uses hole module agent to mediate, form and bake, and uses caustic alkali liquid to activate. The invention applies to aldehyde, ketone, nitrile, aromaticity and so on unsaturated compound. In the hydrogen addition process, the space rate is 0.1í½1h to the power -1, the hydrogen-oil volume rate is 100í½5000:1, the pressure is 0.5í½8MPa, the reaction temperature is 80í½200 deg.C.

Thermo-oxidative aging resistant trans-rubber alloy material as well as preparation method and application thereof

The invention discloses a trans-rubber alloy material as well as preparation and application thereof. The trans-rubber alloy disclosed by the invention is prepared from butadiene and isoprene through segmented copolymerization or parallel polymerization. The preparation method comprises the following steps: adjusting process parameters of segmented copolymerization, including monomer ratio, hydrogen consumption and the like in different reaction stages, to obtain a copolymer consisting of three parts, namely 40-80% by mass of butadiene-isoprene random copolymer, 15-45% by mass of longer trans-1, 3-butadiene-isoprene random copolymer and 5-20% by mass of longer trans-1, 3-butadiene-isoprene copolymer; the trans-rubber alloy material is prepared from the following components in parts by mass: 5-15% of a butadiene-isoprene copolymer containing a long trans-1, 4-polybutadiene block, 5-15% of a butadiene-isoprene copolymer containing a long trans-1, 4-polybutadiene block, a filler, an auxiliary ...

Water retention system for greening vegetation in high-heat arid region

The invention discloses a water retention system for greening vegetation in a high-heat arid area. The water retention system comprises a water storage pool water storage collection and water supply subsystem, an irrigation ditch and water collection ditch water collection subsystem, a vegetation soil water retention subsystem, a control linkage subsystem and a municipal water supply pipe network water supply subsystem. The system has the beneficial effects that the fermentation tank, the water storage tank, bathroom wastewater and natural rainfall are adopted as main water sources, the natural rainfall collecting technology of the irrigation water channel and the water collecting ditch is adopted, the water vapor providing and vegetation excess water collecting technology of the automatic spraying line pipe is adopted, and sandy soil water seepage can be effectively prevented through the plastic film; water irrigated to the vegetation and soil is prevented from permeating into the ground ...

High-thermal-creep-resistance shape-memory pipeline material and preparation method thereof

The invention relates to a shape memory pipeline material with high thermal creep resistance and a preparation method thereof. The pipeline material is prepared from the following components in parts by weight: 100 parts of polybutylene resin, 0.1 to 5 parts of anti-aging agent, 0 to 15 parts of dye, 0.01 to 5 parts of initiator and 0.02 to 10 parts of auxiliary initiator. The pipeline material disclosed by the invention can be prepared by adopting a melt extrusion method, and a melt-extruded pipe has good oil resistance, high-temperature creep resistance and shape memory function, and can be used for long-distance non-excavation pipeline repair of cold and hot water pipes and oil delivery pipes.

Ru-based catalyst for hydrogen production through ammonia decomposition as well as preparation and application methods of Ru-based catalyst

The invention relates to the technical field of hydrogen production, in particular to a Ru-based catalyst for hydrogen production through ammonia decomposition and a preparation and application method thereof.The catalyst is a ruthenium-based catalyst coated with magnesium oxide, ZIF-8 or ZIF-67 coated with MOF-74 is adopted as a carrier, one or more of barium, lanthanum and cesium are adopted as modification auxiliaries, and the modification auxiliaries are added into the ruthenium-based catalyst for hydrogen production through ammonia decomposition. The ultra-high dispersion of the surface active component ruthenium of the catalyst is realized, and the loading capacity of ruthenium is obviously reduced. The prepared catalyst has the advantages of high low-temperature ammonolysis activity, high long-period operation stability, low preparation cost and the like. The invention also discloses a preparation method of the catalyst and the influence of auxiliary introduction on ammonia decomposition ...

METHOD FOR AMPLIFYING OLIGONUCLEOTIDE AND SMALL RNA BY USING POLYMERASE-ENDONUCLEASE CHAIN REACTION

A method for amplifying oligonucleotide in vitro by using polymerase-endonuclease chain reaction (which is called as PECR for short). The method comprises utilizing single-stranded DNA probe containing repeat sequences, and extending target oligonucleotide by thermostable DNA polymerase, and then cleaving extended product with thermostable restriction endonuclease or single-stranded DNA-specific nickase, amplifying target oligonucleotide by thermal cycle reaction. PECR can amplify specific oligonucleotide exponentially by only one probe instead of a pair of primers. The process of PECR is controlled by thermal cycle precisely. The parameters of the thermal cycle can be adjusted flexibly according to the length, sequence, melting temperature and initial moleculus of target oligonucleotide. Speed of the amplification totally depends on the initial moleculus of target oligonucleotide in the reaction system. The method can amplify specific nucleotide with small molecule, such as oligonucleotide ...

Anti-aging trans-rubber composition and preparation method thereof

The invention discloses an anti-aging trans-rubber composition and a preparation method thereof, and the anti-aging trans-rubber composition mainly comprises 50-100 parts of trans-rubber, 0-50 parts of other polymers, 0.5-5 parts of an anti-aging agent, 0.5-5 parts of a metal ion capturing agent, 0-12 parts of a coupling agent, 0-5 parts of a vulcanizing agent, 0-5 parts of an accelerant, 0-5 parts of ZnO, 0-5 parts of stearic acid, 0-70 parts of carbon black and 0-70 parts of white carbon black. In the preparation process of the trans-rubber composition, a conventional anti-aging agent is added, and an efficient and stable metal ion capturing agent is also introduced to chelate and precipitate metal ions, so that the catalytic action of the metal ions on rubber aging is passivated in a chemical inactivation or physical barrier manner, and the anti-aging performance of the trans-rubber composition is improved. The ageing resistance of the trans-rubber composition in storage, transportation ...

Supported sulfurized hydrogenation catalyst taking atom dispersion Mo as auxiliary agent, and preparation method and application of supported sulfurized hydrogenation catalyst

The invention discloses a supported sulfurized hydrogenation catalyst with atomic dispersion Mo as an auxiliary agent and a preparation method and application thereof, and belongs to the technical field of preparation of hydrogenation catalysts in the field of petrochemical engineering. The preparation method comprises the following steps: by taking atomic dispersion Mo species modified aluminum oxide constructed by deriving an MOFs material as a carrier and a mixed solution of soluble sulfur-containing salt containing Mo or W and soluble salt of metal Ni or Co as a co-impregnation solution, putting the carrier into the co-impregnation solution for co-impregnation, and carrying out a post-treatment step to obtain the atom dispersion Mo species modified supported sulfurized hydrogenation catalyst. The catalyst can be used as a hydrotreating catalyst to be applied to hydrofining of industrial petroleum fractions. The method is suitable for preparation of all petroleum fraction hydrogenation ...

MUSIC PLAYING METHOD, THIRD-PARTY APPLICATION AND DEVICE

In the technical field of computers, a music playing method, a third-party application and a device are disclosed. The method comprises: integrating a background music playing module in a third-party application; receiving a music playing signal, the music playing signal comprising a playlist identification (S11); transmitting the music playing signal to the background music playing module through a predetermined interface (S12); the background music playing module obtaining a corresponding playlist according to the playlist identification in the music playing signal (S13); and the background music playing module playing music in the playlist at random (S14). In the present invention, a background music playing module having only core functions such as random playing is integrated in a third-party application, so that resources of a mobile terminal that are occupied when the music player and the third-party application are run at the same time are reduced, and a user can conveniently enjoy ...

Ocean noise monitoring device

The invention discloses an ocean noise monitoring device, and relates to the technical field of ocean environment monitoring, the ocean noise monitoring device comprises a main floating box, the bottom of the main floating box is fixedly connected with a floating cone, the floating cone and a containing groove are both of a hollow plastic structure, it is ensured that the floating cone floats in seawater, a lifting rod is installed in the floating cone, and the bottom of the lifting rod is fixedly connected with a detection head. An underwater noise monitor is installed in the detection head, a concave containing groove is formed in the periphery of the floating cone, an outward turning rod is installed in the containing groove, the end of the outward turning rod is rotatably installed in the containing groove, driving rods are rotatably installed at the positions, corresponding to the outward turning rod, of the main floating box, and the ends, away from the main floating box, of the driving ...

METHOD AND DEVICE FOR DETECTING MARINE MAGNETISM

Provided is a device for detecting marine magnetism, the device comprising a surveying vessel (11), an on-board laboratory magnetism detecting part arranged on the surveying vessel (11), an aerostat housing (12) and an aerostat magnetism detecting part arranged inside the aerostat housing (12). The aerostat housing (12) is connected to the surveying vessel (11) via a rope (13), and the aerostat housing (12) floats in the air. The aerostat magnetism detecting part comprises a magnetic sensor, an electronic unit for collecting magnetic data, and an aerostat transmission unit; and the on-board laboratory magnetism detecting part comprises a data recording computer and a laboratory transmission unit. Further provided is a method for detecting marine magnetism. The method is not limited by a working sea area, and can also synchronously work with other on-board equipment and towing equipment.

File cabinet

... 本实用新型涉及档案储放装置的技术领域，特别是涉及一种档案柜，本实用新型的档案柜可进行分腔室大小调节，从而提高适应能力；并且可对档案文件存放更为规整；包括柜体、隔板和柜门，柜体的内部设置有放置腔；隔板为两组，分别为上隔板和下隔板，上隔板和下隔板将放置腔隔成第一腔室、第二腔室和第三腔室；上隔板的顶端设置有下固定槽，柜体内顶部设置有上固定槽，并在上固定槽和下固定槽内分别设置有上滚珠轴承和下滚珠轴承，第一腔室内设置有转轴和圆柱形放置架；第三腔室内设置有上支架、下支架和调节管。 ...

Tower drum mold and preparation method of tower drum

The embodiment of the invention provides a tower drum mold and a preparation method of a tower drum, the tower drum mold is used for preparation of the tower drum, and the tower drum mold comprises an annular end mold plate, and the end mold plate comprises a first positioning hole formed in a penetrating mode; the positioning component is connected to the end template, the positioning component comprises a first positioning section, a transition section and a second positioning section, the first positioning section is located in the first positioning hole, the section size of the transition section has an increasing trend in the direction from the first positioning section to the second positioning section, and the size of the transition section is smaller than or equal to that of the second positioning section; the limiting embedded part is provided with a second positioning hole, and the second positioning section is located in the second positioning hole. According to the embodiment ...

Preparation method for refining nickel-based cast superalloy grains through mechanical vibration

The invention discloses a preparation method for refining nickel-based cast superalloy grains through mechanical vibration, and belongs to the technical field of superalloy material preparation.The method comprises the steps that a nickel-based superalloy raw material is put into a vacuum electric arc furnace, multiple times of electric arc melting is continuously carried out in the argon atmosphere, and the nickel-based cast superalloy grains are obtained; carrying out electromagnetic stirring in the smelting process to obtain a melt with uniform components, and solidifying the melt to obtain a button ingot; melting the button ingot in an argon atmosphere in a vacuum arc furnace, pouring the molten button ingot into a casting mold which is in a horizontal periodic mechanical vibration state, and keeping the mechanical vibration until the melt is completely solidified, so as to prepare a nickel-based cast high-temperature alloy; vibration generated by a mechanical vibration device outside ...

Water retention system for greening vegetation in high-heat arid region

The invention discloses a water retention system for greening vegetation in a high-heat arid area. The water retention system comprises a water storage pool water storage collection and water supply subsystem, an irrigation ditch and water collection ditch water collection subsystem, a vegetation soil water retention subsystem, a control linkage subsystem and a municipal water supply pipe network water supply subsystem. The system has the beneficial effects that the fermentation tank, the water storage tank, bathroom wastewater and natural rainfall are adopted as main water sources, the natural rainfall collecting technology of the irrigation water channel and the water collecting ditch is adopted, the water vapor providing and vegetation redundant water collecting technology of the automatic spraying line pipe is adopted, and sandy soil water seepage can be effectively prevented through the plastic film; the soil is laid on the foam sponge layer, the soil at the root system of the vegetation ...

Magnesium-based alloy, magnesium-based composite material, preparation method and hydrolysis hydrogen production device

The invention relates to a magnesium-based alloy, a magnesium-based composite material, a preparation method and a hydrolysis hydrogen production device, the magnesium-based alloy comprises Mg and metal M, and the metal M comprises at least one of Ca, In and lanthanide elements; the mass fraction of Mg in the magnesium-based alloy is 60%-99.9%; and the mass fraction of the metal M in the magnesium-based alloy is 0.1-40%. By adjusting the components of the alloy, hydrogenation hydrogen storage can be effectively carried out, rapid hydrolysis release can be achieved, and the hydrogen production rate and the hydrogen production amount are increased.

Method for producing biodiesel through hydrogenation of waste oil and fat

The invention relates to the technical field of bio-oil products, and discloses a method for producing biodiesel by hydrogenation of waste oil, which comprises the following steps: mixing waste oil, hydrogen and a hydrogenation pretreatment catalyst, and adding the mixture into a slurry bed hydrogenation reactor for hydrogenation; a tailing part obtained from an effluent after hydrogenation through a cyclone hydraulic separator is circulated to the slurry bed hydrogenation reactor; carrying out gas-liquid separation on a liquid product, purifying the hydrogen-rich gas for recycling, and carrying out solid-liquid separation on a liquid-phase product; the separated liquid phase product enters a hydrofining reactor, a hydroisomerization reactor and a post-refining reactor which are connected in series for hydrogenation; and carrying out gas-liquid separation on the hydrogenation product, and fractionating the liquid product to obtain the biodiesel. According to the method, hydro-conversion ...

METHOD FOR INDUSTRIAL PRODUCTION OF TRANS-BUTADIENE-ISOPRENE COPOLYMER RUBBER AND APPARATUS THEREFOR

The present invention relates to a method for industrial production of a butadiene-isoprene copolymer rubber having a trans-1,4-structure (TBIR) and an apparatus for implementing the method. The production method comprises: pumping a predetermined amount of a butadiene and an isoprene into a polymerization reactor, and performing bulk polymerization in the presence of a catalyst to obtain TBIR; performing extrusion, devolatilization, granulation and drying on the produced TBIR, and then packaging the produced TBIR; and separating unreacted monomers by a recovery and separation device followed by separately refining the unreacted monomers, and then returning the unreacted monomers to a batching device or a storage tank. The production apparatus comprises a recovery and refining unit, a polymerization unit, a post-treatment unit and a utility unit. By means of the production apparatus and the production method, the present invention allows industrial production of TBIR by bulk polymerization ...

USER INTERFACE DISPLAY METHOD AND TERMINAL DEVICE

The embodiments of the present application provide a compatibility solution for TUI and Android display. A custom secure control is further added to native controls provided by a rich operating system, so as to simplify the development of a TUI. Specifically, a rich operating system performs rendering processing on the native controls of a user interface, a non-secure layer obtained after the rendering processing is synchronously sent to a frame buffer of a TEE side of a trusted operating system, and information about a recognized secure control on the user interface is transferred to the TEE side of the trusted operating system. The trusted operating system performs rendering processing on the secure control according to the information about the secure control and a customization method corresponding to the secure control, and a secure layer and a non-secure layer obtained after processing are stacked and displayed by a display device.

SUBMARINE EARTHQUAKE MONITORING APPARATUS AND SYSTEM BASED ON SUBMARINE INTERNET OF THINGS

Disclosed is a submarine earthquake monitoring apparatus based on a submarine Internet of Things, the apparatus comprising: a sea surface buoy network device (1), a submarine network device (2), a mooring system (3) and a submarine earthquake detection device (4), wherein the sea surface buoy network device (1) is connected to the submarine network device (2) by means of the mooring system (3); the submarine network device (2) is connected to the submarine earthquake detection device (4) by means of a submarine photoelectric composite cable (6); one or more submarine earthquake detection devices (4) are provided; the sea surface buoy network device (1) comprises a satellite transceiving apparatus (101), an Internet of Things platform server (102), a network time server (103) and an autonomous energy supply apparatus (104); the submarine network device (2) comprises a photoelectric separation cabin (201), a submarine server (202), a bottom anchor weight (203) and a mechanical releaser (204 ...

Cathode based on glow discharge and hollow cathode effect

The invention discloses a cathode based on glow discharge and a hollow cathode effect, belongs to the technical field of space electric propulsion electron sources, and aims to solve the problems that a traditional hollow cathode is high in heater failure risk and difficult to work in an oxygen environment. The device comprises an air supply pipe, a negative electrode, a touch holding electrode and a leading-out electrode, the contact pole is sleeved outside the discharge cavity from the top end of the negative pole, and the leading-out pole is sleeved outside the contact pole from the top end; an air inlet hole is formed in the center of a bottom plate of the negative electrode and communicated with an air supply pipe, a throttling hole for maintaining air pressure of the discharge chamber is formed in the center of a top cover of the contact electrode, and a lead-out hole is formed in the center of a top cover of the lead-out electrode; a discharge power supply is loaded between the negative ...

一种用于含烯烃石脑油选择性加氢脱硫的催化剂及其制备方法

A catalyst for selective hydrodesulfurizing of the naphtha containing olefine is prepared by single-layer dispersion method, and contains CoO+MoO3 (6-20 wt.%), MgO (8-20), and Al2O3 (40-86). Its advantages are high hydrodesulfurizing powder, lower olefine saturation level, less loss of octane number, and high catalytic activity, selectivity and stability.

四硫代钨酸铵的制备方法

The present invention relates to improved preparation process of high purity chemical. High purity ammonium tetrathiotungstate is prepared through the reaction between ammonium metatungstate or tungsten trioxide and ammonium sulfate solution. Preparing high purity ammonium tetrathiotungstate in the said process of the present invention has ammonium sulfate amount near the required stoichiometric amount, mild reaction condition, short reaction period, less waste exhaust, high product yield, high product purity, and no need of treating virulent and effluvial hydrogen sulfide gas.

Catalyst for propylene gas-phase epoxidation, preparation method thereof and propylene gas-phase epoxidation method

The invention relates to the technical field of propylene gas-phase epoxidation, in particular to a catalyst for propylene gas-phase epoxidation, a preparation method of the catalyst and a propylene gas-phase epoxidation method.The method comprises the steps that under the condition that the pH is 6-10, a titanium silicalite molecular sieve, a boron-containing additive and a chloroauric acid aqueous solution are mixed and stirred to obtain turbid liquid; and in a hydrogen atmosphere, roasting filter residues obtained by filtering the turbid liquid to obtain the catalyst for propylene gas-phase epoxidation, wherein the boron-containing auxiliary agent is selected from at least one of boric acid, borax and sodium metaborate. The boron-containing auxiliary agent is added in the gold loading process, so that the content of gold nanoparticles with the particle size of 1-2 nm in the catalyst can be increased, and the selectivity of propylene in the propylene gas-phase epoxidation reaction is ...

Biodegradable nanocellulose-pullulan food inner packaging material and preparation thereof

The invention provides a biodegradable pullulan-nanocellulose food inner package as well as a preparation method and application of the biodegradable pullulan-nanocellulose food inner package. The nanocellulose-pullulan polysaccharide food inner package is prepared from a film forming composition, and the film forming composition comprises a dry substance and water, and the dry substance is composed of nanocellulose, pullulan polysaccharide and glycerin. Wherein the concentration of the nanocellulose is 0.1 mg/mL to 1.2 mg/mL, and the concentration of the pullulan polysaccharide is 20 mg/mL to 60 mg/mL; the concentration of the glycerol is 2 to 6 mg/mL. The pulullan-nanocellulose food inner package disclosed by the invention not only can be safely eaten, but also has high strength, high folding resistance, high barrier property and high oil resistance, and realizes low water sensitivity, so that the pulullan-nanocellulose food inner package has high humidity stability (the mechanical property ...

FULLY-DIFFERENTIAL CURRENT AMPLIFYING CIRCUIT

Provided is a fully-differential current amplifying circuit, comprising: a current gain circuit (10), configured to amplify or attenuate preset gains of two differential input currents (ip, in) respectively by means of two identical transconductance linear loops (11); and a differential output circuit (20) connected to the current gain circuit (10), configured to perform equal division and subtraction, by means of a current reproduction circuit and a current mirror that are symmetrically arranged, with respect to two differential input currents (A*ip, A*in) that have been amplified or attenuated, so as to output a differential current (io+, io-) in which a background current is eliminated. The fully-differential current amplifying circuit can directly process a weak current signal and has a simple structure. The entire system works in a sub-threshold area, and a power voltage and operating current are very low, such that power consumption is greatly reduced. The fully-differential structure ...

Ocean three-dimensional seismic acquisition system with double-source alternate excitation

The invention provides an ocean three-dimensional seismic acquisition system with double-source alternate excitation. A first side electric spark source and a second side electric spark source are arranged at the stern of an exploration ship in a dragging mode, a central control unit and an alternate blasting control module are arranged on the exploration ship, the alternate blasting control module controls the first side electric spark source and the second side electric spark source to conduct alternate blasting, and source data are collected through a data collection towing cable. Wherein the data acquisition towing cables are arranged between the first side electric spark emission array and the second side electric spark emission array at equal intervals, and the distance between the first side electric spark emission array and the nearest data acquisition towing cable in the transverse direction is 1/2 of the cable spacing; and the distance between the second side electric spark emission ...

Oil-soluble nickel-tungsten or nickel-molybdenum bimetallic catalyst as well as preparation method and application thereof

The invention provides an oil-soluble nickel-tungsten or nickel-molybdenum bimetallic catalyst and a preparation method and application thereof.The preparation method comprises the steps that a molybdenum source or a tungsten source and a vulcanizing agent are mixed and then react, and thiomolybdate or thiotungstate is obtained; the preparation method comprises the following steps: mixing thiomolybdate or thiotungstate with a nickel source, and reacting to obtain a sulfur-containing nickel-molybdenum bimetallic salt compound or a sulfur-containing nickel-tungsten bimetallic salt compound; reacting the sulfur-containing nickel-molybdenum bimetallic salt compound or the sulfur-containing nickel-tungsten bimetallic salt compound with organic acid to prepare a precursor of an oil-soluble nickel-molybdenum bimetallic catalyst or a precursor of a nickel-tungsten bimetallic catalyst; dissolving a precursor of an oil-soluble nickel-molybdenum bimetallic catalyst or a precursor of a nickel-tungsten ...

Propylene gas-phase epoxidation catalyst, preparation method thereof and propylene gas-phase epoxidation method

The invention relates to the technical field of propylene gas-phase epoxidation, in particular to a propylene gas-phase epoxidation catalyst, a preparation method thereof and a propylene gas-phase epoxidation method, and the method comprises the following steps: (1) under the condition that the pH is 6-10, mixing a titanium silicalite molecular sieve, an auxiliary agent and a chloroauric acid aqueous solution, and blowing air to obtain a turbid liquid; and (2) in a hydrogen atmosphere, roasting filter residues obtained by filtering the suspension to obtain the propylene gas-phase epoxidation catalyst, wherein the auxiliary agent is selected from amino acid and/or polypeptide. According to the method, a specific auxiliary agent is combined with a specific air blowing mode to optimize the gold loading process, the content of gold nanoparticles with the particle size ranging from 1 nm to 3 nm can be increased, the coordination effect of Au and TS-1 is enhanced, the catalytic activity of the ...

Automatic pouring system for concrete tower drum

The invention provides an automatic pouring system for a concrete tower drum, which comprises a pouring space defined by an inner mold, an outer mold and a bottom mold; the multiple pouring openings are formed in the circumferential direction of the pouring space at intervals and communicate with the pouring space; the discharging device is used for pouring concrete into the pouring space through the pouring opening; the monitoring equipment is used for monitoring the height of concrete in the pouring space corresponding to each pouring opening; the controller controls the discharging device to conduct pouring through the current pouring opening and receives concrete height information provided by the monitoring device, and when the concrete height corresponding to the current pouring opening exceeds a threshold value, the controller controls the discharging device to conduct pouring through the current pouring opening. The controller controls the discharging device to conduct pouring through ...

Preparation method of space confinement type nickel-molybdenum diesel hydrogenation catalyst

The invention discloses a preparation method of a space confinement type nickel-molybdenum diesel hydrogenation catalyst, which is based on diesel hydrogenation catalyst active phase structure control, effectively regulates and controls the structure size of an obtained MoS2 central active phase by adopting a specially optimized catalyst preparation process, ensures the proximity relation between a Ni component and MoS2 central protogenesis, and improves the catalyst performance. Therefore, the supported nickel-molybdenum-based diesel hydrogenation catalyst with good hydrodesulfurization activity and hydrogenation selectivity is prepared. The NiMo-based diesel hydrogenation catalyst is characterized in that the pore space confinement effect of a specific carrier with a straight-through pore with the size of 10-30 nm serves as a catalyst structure design basis, a special catalyst preparation method is matched, effective control over the structure size of a MoS2 active phase is finally achieved ...

Novel file cabinet

... 本实用新型涉及档案储放装置的技术领域，特别是涉及一种新型档案柜，本实用新型的新型档案柜可进行分腔室大小调节，从而提高适应能力；并且可对档案文件存放更为规整；包括柜体、隔板和柜门，柜体的内部设置有放置腔；隔板为三组，分别为上隔板、中隔板和下隔板，将放置腔隔成第一腔室、第二腔室、第三腔室和第四腔室；第一腔室左侧壁和右侧壁分别设置有左固定槽和右固定槽，并在左固定槽和右固定槽内分别设置有左滚珠轴承和右滚珠轴承，第一腔室内设置有转轴和圆柱形放置架，放置架上设置有多个放置槽；第二腔室内纵向设置有多个挡板，将第二腔室隔成多个储放腔；第四腔室内设置有上支架、下支架和调节管。 ...

Ceramic core with multi-layer wall structure and preparation method of ceramic core

The invention provides a ceramic core with a multilayer wall structure. The plasticizer is prepared from 62 # fully-refined paraffin, 58 # fully-refined paraffin, 48 # fully-refined paraffin, 42 # fully-refined paraffin, microcrystalline wax, bonding wax, palmitic acid, stearic acid, low-density polyethylene, an ethylene-vinyl acetate copolymer, sodium dodecyl benzene sulfonate, organic chopped fibers, inorganic chopped fibers, graphite powder and bentonite; the oil phthalein sarcosinic acid octadecylamine salt and the nano silicon dioxide are prepared. The invention also provides a preparation method of the ceramic core with the multilayer wall structure. By controlling the formula and the preparation process of the ceramic core, the toughened multilayer wall structure ceramic core is prepared, and the material is high in strength, good in toughness and excellent in mold filling performance, can be applied to preparation of multilayer wall structure ceramic cores of different sizes, and ...

Novel LNG filling station BOG reliquefaction recovery system

... 本实用新型涉及一种新型LNG加注站BOG再液化回收系统，所述新型LNG加注站BOG再液化回收系统包括LNG低温储罐、LNG槽车、LNG泵池、LNG加气机、车载气瓶以及液氮储罐，其中所述LNG低温储罐和所述LNG槽车通过进液管路连接；所述LNG低温储罐与所述液氮储罐通过进氮管路和出氮管路连接，所述液氮储罐中的液氮对所述LNG低温储罐中的BOG进行液化；所述LNG低温储罐与所述LNG加气机通过进气管路和出气管路连接。本实用新型提供的新型LNG加注站BOG再液化回收系统解决了BOG排放造成的经济损失，消除了BOG排放造成的噪声污染和环境污染，同时消除了BOG排放时带来的安全隐患。 ...

Biodegradable nanocellulose-pullulan-lignin food outer packaging material and preparation thereof

The invention provides a biodegradable pullulan-nanocellulose-lignin food outer package as well as a preparation method and application of the biodegradable pullulan-nanocellulose-lignin food outer package. The outer package is of a layered structure, is formed by alternately arranging and tightly combining N layers of pullulan-nano cellulose composite films and N + 1 layers of nano cellulose-lignin composite films, and is of a sandwich-like structure. Two layers on the outer side of the outer package are nanocellulose-lignin composite films; n is equal to 1-3. The preparation method of the outer package specifically comprises the following steps: alternately arranging and stacking N + 1 layers of nano cellulose-lignin composite films and N layers of pullulan polysaccharide-nano cellulose composite films together, and carrying out hot pressing for 5-10 seconds under the conditions of 100-120 DEG C and 1-2.5 Mpa, so as to obtain the biodegradable food outer package. According to the food ...

Infrared temperature monitoring system

The invention relates to the technical field of infrared temperature measurement, in particular to an infrared temperature monitoring system which comprises a base, a connecting shell is fixedly mounted on the upper surface of the base, a pressing plate is slidably arranged on the inner side of the connecting shell through a distance adjusting mechanism, and the rear end of the base is fixedly connected with one end of a bandage. The other end of the bandage penetrates through the lower surface of the pressing plate and then penetrates out of the upper surface of the connecting shell, a connecting plate is slidably inserted into one side of the base, a supporting plate is fixedly connected to one end of the connecting plate, and the pressing plate compresses the toothed plate and the bandage when moving downwards. Two hands are liberated in outdoor use, convenience is brought, and infrared thermal imaging of front and back position visual angles can be synchronously carried out, so that ...

Monolithic catalyst for producing succinic anhydride through maleic anhydride hydrogenation as well as preparation method and application of monolithic catalyst

The invention discloses a monolithic catalyst for producing succinic anhydride through maleic anhydride hydrogenation and a preparation method and application thereof, and belongs to the technical field of catalyst preparation and application. According to the monolithic catalyst, foamed nickel serves as a catalytic hydrogenation active component and a carrier, ammonia water hydrothermal etching is adopted, a petal-shaped nickel hydroxide sheet layer is generated in situ to increase the active specific surface area of the catalyst, and then a first auxiliary and a second auxiliary are loaded through an impregnation method to form the monolithic catalyst. The first auxiliary agent comprises one or two of molybdate and tungstate, and the second auxiliary agent comprises one or more of metal salts of magnesium, barium, cerium and potassium. The monolithic catalyst is filled in a fixed bed reactor and is used in a process for continuously producing butanedioic anhydride through maleic anhydride ...

Acoustic signal measuring and processing method based on drill rod propagation

The invention provides a sound wave signal measuring and processing method based on drill rod propagation. The method comprises the following steps: step 1, arranging a sensor; step 2, collecting background noise signals; 3, calculating a transfer function; step 4, performing EMD domain spectrum subtraction filtering; and step five, deconvolution filtering is carried out. Compared with a traditional drill rod sound wave communication and identification method, the sound wave signal processing method based on drill rod propagation provided by the invention can bring improvements and improvements in two parts: firstly, the problem of background noise in measurement while drilling sound wave communication is solved by adopting an EMD domain subtraction filtering method, and the signal-to-noise ratio of a received signal is improved; and secondly, the waveform distortion effect caused by the uneven transfer function is eliminated by adopting deconvolution, and the waveform recognition rate ...

Novel rapid reinforcing method for existing tunnel structure through steel corrugated plates

The invention belongs to the field of tunnel construction, and particularly relates to a novel rapid reinforcing method for an existing tunnel structure by adopting a steel corrugated plate, which comprises the following steps of: arranging a reinforced concrete foundation on the ground in a tunnel, and pre-embedding a steel corrugated plate base; mounting a steel corrugated plate piece on the steel corrugated plate base; a gap between the steel corrugated plate and the tunnel is filled with concrete, and in the filling process, the section size of the steel corrugated plate is monitored in real time through a detection assembly; moisturizing and curing the concrete; the shape of the steel corrugated plate is detected through the detection assembly on the vertical plate, and it is guaranteed that the left end and the right end of the steel corrugated plate are symmetrical. The steel corrugated plate and the tunnel are integrally reinforced by filling gaps, and the detection process can ...

Deep dragging type multi-channel seismic offset accurate positioning method suitable for complex seabed interface

The invention provides a deep-towed multichannel seismic offset accurate positioning method suitable for a complex seabed interface. The method comprises the following steps: calculating the horizontal offset and the vertical offset of each detection point of a deep-towed seismic receiving cable relative to the position of a deep-towed seismic source excitation point; calculating the travel time theoretical calculation value of the direct wave, the travel time theoretical calculation value of the sea surface reflected wave and the travel time theoretical calculation value of the seabed reflected wave received by each shot gather detection point; constructing a target function for synchronous optimization inversion of the geometric morphology characterization parameters and the seawater sound velocity optimization parameters of the deep-towed multichannel seismic receiving array under the complex seabed interface condition; and solving the objective function, and completing the accurate ...

Automatic sand shoveling and screening device for building

The invention discloses an automatic sand shoveling and screening device for construction. The automatic sand shoveling and screening device comprises an elevator, a screen device and a main body bracket, the elevator comprises a conveying belt, a hopper arranged on the conveying belt and a feeding port used for conveying sand on the raw material sand pile to the upper portion of the screen device. The screen device is of a regular polygon roller structure, a screen is installed on each face of the roller structure, a dome-cavity-shaped material collecting chamber is arranged below each screen, the different material collecting chambers are separated through partition plates, and first discharging openings are formed in the side faces of the material collecting chambers. A second discharge hole is formed in the outer surface of the screen device in the rolling direction; and the screen device is used for discharging the fine sand entering the material receiving chamber from the first discharge ...

Stratum interface interpolation modeling method for intelligent mining

The invention discloses a stratigraphic interface interpolation modeling method for intelligent mining. The stratigraphic interface interpolation modeling method comprises the steps that 1, data measured by a working face is arranged into a set alpha; step 2, carrying out gridding processing on the set alpha to form a set beta 1 of grid points; step 3, obtaining insertion point coordinates in the insertion point set phi1; 4, setting an initial z coordinate of each point in the point set phi 1; 5, setting the weight of each point in the point set phi 1 and the set beta 1; 6, defining the potential eta a of each point in the point set phi 1 and the set beta 1; step 7, obtaining a union set of the point set phi 1 and the point set beta 1; step 8, circularly executing the step 7; step 9, replacing the set beta 1 obtained in the step 8 with the set beta 1 obtained in the step 2 to obtain a new union set; step 10, calculating the grid spacing of the union set, and judging whether the grid spacing ...

一种固定床加氢用的骨架金属催化剂及其制备方法

The skeletal metal catalyst for hydrogenation in fixed bed is prepared with the alloy powder of Al and one or several of Ni, Co, Cu and Fe as main material, jelly prepared with pseudothin diasphore and other inorganic matter as adhesive and sesbania powder, carboxymethyl cellulose or other natural or synthetic organic matter as pore template agent, and through direct kneading, formation, roasting and activation with caustic soda solution. The catalyst may be used in hydrogenating saturation of aldehyde, ketone, nitrile and other unsaturated compound in fixed bed, and has excellent activity, selectivity and stability.

一种用于含烯烃石脑油加氢处理的催化剂及其制备方法

The present invention relates to a catalyst for hydrogenation treatment of naphtha containing olefine and its preparation method, which mainly uses macroporous or mesoporous acidic zeolite molecular sieve, and its composition includes 40-80 wt% of acitic zeolite molecular sieve, 0-60 wt%, of gamma-Al2O3 and 0-20 wt% of metal of group VIB and group VIII. Said catalyst has excellent hydrogenation desulfurization property and aromatization property, not only can reduce sulfur content of naphtha containing olefine, but also can obviously reduce its olefine content at the same time. It has excellent catalystic activity and good stability.

Method for preparing pyridone compound and intermediate thereof

The invention relates to a method for preparing a pyridone compound and an intermediate thereof, the method uses a compound II, a compound III and a compound V as raw materials, and the method comprises the following steps: 1, carrying out a coupling reaction on the compound II and the compound III under the action of a catalyst 1 to prepare a compound IV; 2, reacting the compound IV with a compound V under the action of a diazotization reagent and a catalyst 2 to obtain a compound VI; 3, reacting the compound VI under a certain condition to generate a compound VII; 4, the compound VII sequentially reacts with a reagent 1, methylamine and a reagent 2, and the pyridone compound I is obtained. The method provides a new method for preparing the pyridone compound, and has the advantages of mild reaction conditions, small corrosion to equipment, less three wastes and high safety. The reaction formula is as follows: step 1, step 2, step 3 and step 4.

一种用于中间馏分油深度加氢处理的含分子筛催化剂及其制备方法

The present invention relates to a catalyst containing molecular sieve for further hydrogenation treatment of intermediate distillate oil, specially for making further hydrogenation treatment of low-grade diesel oil (for example, high-sulfur naphthenic base straight-run diesel oil, coker diesel oil, coker cracked diesel oil or their mixture), and the treated diesel oil can be used as blending component of high-grade diesel oil. Said invented catalyst is formed from carrier obtained by high-temp. roasting domestic macroporous and mesoporous diaspore made up by using aluminium sulfate through carbon dioxide precipitation process, fluorine adjuvant and active components of phosphorus, nickel and molybdenum, etc.

Hydrogenation pretreatment method for waste plastic pyrolysis oil

The invention relates to the technical field of petroleum processing, and discloses a waste plastic pyrolysis oil hydrogenation pretreatment method, which comprises: respectively preheating waste plastic pyrolysis oil and hydrogen, mixing with a hydrogenation catalyst, and introducing into a slurry bed hydrogenation reactor for hydrogenation; after hydrogenation, effluent is separated by a two-stage cyclone hydraulic separator, obtained tailings are partially circulated to the slurry bed hydrogenation reactor, and a liquid product enters a high-pressure separator and a low-pressure separator; the gas separated by the high-pressure separator is recycled after being adsorbed and purified; a liquid product separated by the low-pressure separator enters a solid-liquid separation unit, and an obtained liquid-phase product is pyrolysis oil subjected to hydrogenation pretreatment. According to the present invention, the process flow is simple, the cycle service life of the hydrogenation catalyst ...

Heat dissipation ceiling lamp

The utility model relates to a heat dissipation ceiling lamp which comprises a cooling shell, a lamp body and a lamp shell, the lamp body is connected with the lamp shell, the cooling shell covers the outer side of the lamp shell, a closed containing cavity is formed between the cooling shell and the lamp shell, cooling water is contained in the containing cavity, a plurality of ribs are fixedly arranged on the inner circumferential wall of the cooling shell, and the ribs are arranged on the outer circumferential wall of the cooling shell. The ribs are located in the containing cavity, the ribs are provided with filler grooves, groove openings of the filler grooves penetrate through the peripheral wall of the cooling shell, and the filler grooves are filled with heat conduction materials. The ceiling lamp has the effect of improving the heat dissipation performance of the ceiling lamp.

Multi-laser radar registration method based on plane recognition

The invention discloses a multi-laser radar registration method based on plane identification, and the method comprises the steps: installing n pieces of laser radar equipment on a plane perpendicular to the ground, connecting the n pieces of laser radar equipment to a server, numbering the n pieces of laser radar equipment, and recording environment parameters; all the laser radar devices are started, and point cloud data after time synchronization of all the online laser radar devices are obtained; the online laser radar equipment is laser radar equipment capable of transmitting point cloud data to the server in real time after being started; any online laser radar device is selected as a reference laser radar device, and the rest laser radar devices are used as to-be-registered laser radar devices; rotation transformation between two adjacent laser radars is estimated through two fixed planes which are perpendicular to each other, registration of a plurality of laser radars can be realized ...

Data updating method and device based on real matrix

The invention provides a real matrix-based data updating method, which comprises the following steps of: determining the sequence and/or starting condition of process nodes according to a transaction operation rule, and presetting a characteristic table template for each node; the system receives the tasks and assigns a unique number to each task, the unique numbers are stored in the link table, the characteristic table is expanded based on the unique numbers, and the characteristic table is linked with the link table through the unique numbers; the system runs a task, and any node generates production information in the process and stores the production information in the corresponding characteristic table; the system receives a query request, and based on a query limiting condition, the link table links the related working characteristic table through the unique number; and completing data updating based on the real matrix data structure. A unique number is set for a receiving task, and ...

Hydrogenation purification method for waste plastic pyrolysis oil

The invention relates to the technical field of petroleum processing, and discloses a waste plastic pyrolysis oil hydrogenation purification method, which comprises: respectively preheating waste plastic pyrolysis oil and hydrogen, mixing with a hydrogenation catalyst, and introducing into a slurry bed hydrogenation reactor for hydrogenation; a solid-containing tailing part separated from an effluent after hydrogenation through a gas-liquid-solid cyclone separator is circulated to the slurry bed hydrogenation reactor; a gas-liquid mixed product enters a gas-liquid separator, and a liquid-phase product enters a liquid-solid separator; solid residues are discharged out of the device, and a liquid product enters a fixed bed hydrogenation reactor for hydrorefining to obtain the waste plastic pyrolysis oil subjected to hydrogenation purification. According to the present invention, the process flow is simple, the service life of the hydrogenation catalyst is long, the slurry bed hydrogenation ...

System, method and device for realizing automatic task execution by identifying state identifier

The invention provides a system for automatically executing a task by identifying a state identifier, which comprises the following steps of: presetting a working template for a process node based on the executed task, and storing the working template as a characteristic table; the work data acquired by any process node is stored in the characteristic table, and the execution state of the work record is identified as false and is used as a first node state; the system is provided with a time sequence refreshing mechanism Timer event, regularly screens the working record of the first node state, and executes the corresponding task; after execution is completed, the state identifier is updated to true and serves as a second node state; and refreshing according to a set frequency until all the working records of the first node state are updated to the second node state. According to the method, the state identifier of the first node serves as a judgment basis of the starting second node, automatic ...

Preparation method of aluminum alkoxide salt

The invention provides a preparation method of alcohol aluminum salt, and relates to the field of synthesis of basic metal organic chemical materials, the method comprises the following steps: step 1, filling an aluminum material into a bed reactor; 2, leaching a bed layer by using a catalyst alcohol solution; 3, supplementing an alcoholic solution for reaction; and 4, collecting and treating a reaction product. According to the method, alcohol and elemental aluminum are used as raw materials and placed in a continuous flow bed reactor, a catalyst is introduced, certain pressure and temperature conditions are started, and the alcohol and the metallic aluminum react to prepare the alcohol aluminum salt product. The method creates a precedent for efficient synthesis of the multi-degree-of-adaptation C2-C6 alcohol aluminum salt, and provides reliable guarantee for industrial production of alkyl aluminum salts with different varieties and different characteristics and application of downstream ...

一种加氢催化剂的现场外预硫化方法

The in-situ hydrogenation catalyst pre-sulfurizing method is to use ammonium sulfide solution containing sulfur to treat petroleum fraction hydrogenating catalyst with oxide of IVB metal Mo or W and VIII metal Co or Ni or their precursor loaded and to convert the oxide of the active component or their precursor into metal sulfide with hydrogenation activity. The outside pre-sulfuizing of the hydrogenation catalyst is utilized to replace available inside pre-sulfuizing, which has complicated operation and expensive cost. The method is suitable for all kinds of petroleum fraction hydrogenating catalyst and the processed catalyst has hydrogenation activity reaching or even exceeding that of internal pre-sulfurized one.

BOG recycle system

... 本实用新型涉及一种BOG回收利用系统，其特征在于所述BOG回收利用系统包括：LNG槽车、汽化器、缓冲罐、压缩机、储气瓶组以及售气机，所述LNG槽车、汽化器、缓冲罐、压缩机、储气瓶组以及售气机通过管道依次连通。本实用新型提供的BOG回收利用系统有效地处理掉过量的BOG气体，维持了系统的稳定性。 ...

Document verification method and device, electronic equipment and storage medium

The invention discloses a document verification method and device, electronic equipment and a storage medium, and relates to the field of financial science and technology or other related fields, the verification method comprises the following steps: parsing a target document, obtaining a service request parameter and an expected service response parameter, based on the service request parameter, initiating a service request to a target software system, based on the expected service response parameter and the actual service response parameter, determining a technical effective rate of a preset technical element and a service effective rate of a preset service element in the target document, and based on the technical effective rate and the service effective rate, determining the effectiveness of the target document. The technical problem that the effectiveness of the research and development document is difficult to determine in related technologies is solved.

Full-automatic annular welding machine

The invention relates to the technical field of annular welding machines, and provides a full-automatic annular welding machine which comprises a rack. The two rubber rollers are both arranged on the machine frame in a rotating mode; the two ends of the fastening belt are connected with the two rubber rollers respectively, and a clamping space is formed between the two rubber rollers and the fastening belt; the welding machine is movably arranged on the rack, and the welding machine is close to or away from the clamping space after moving; and the liquid storage tank is arranged on the rack and is positioned below the welding machine. By means of the technical scheme, the problems that in the prior art, a welding part is designed in a hidden corner, a universal portable annular welding machine cannot complete 360-degree circular seam welding in a narrow space, and blind welding can only be conducted on the part which is inconvenient to weld by relying on the experience of an operator, and ...

Integral type depressurization system

... 本实用新型涉及一种一体式减压系统，包括进气管道、出气管道以及放气管道，其特征在于在所述进气管道上设有换热器和一体式减压装置；所述一体式减压装置包括并联的4组一体式减压阀；所述一体式减压阀包括串联设置的减压阀、控制阀以及安全阀。本实用新型的一体式减压系统只经过一级减压，结构简单，效率高。 ...

一种用于含烯烃石脑油馏分加氢改质的催化剂及其制备方法

The present invention relates to a catalyst for hydroupgrading naphtha fraction containing olefine and its preparation method. It is mainly characterized by that it contains macroporous or nesoporousacidic zeolite molecular sieve, and its composition contains 40-80 wt% of acidic zeolite molecular sieve, 0-60 wt% of gamma-Al2O3 and 0-24 wt% of metal of group VIII. Said catalyst not only can reduce sulfur-content of said naphtha fraction containing olefine, but also can reduce its olefine content, and has good catalytic activity and good stability.

Titanium silicalite molecular sieve and preparation method thereof

The invention relates to the technical field of molecular sieve preparation, in particular to a titanium silicalite molecular sieve and a preparation method thereof.The method comprises the steps that 1, a silicon source, an alkaline template agent, a titanium source and water are mixed to be uniform, and titanium silicalite sol is obtained; (2) adding a silanization reagent into the titanium-silicon sol, and carrying out hydrothermal crystallization and roasting on the obtained mixture; the specific silanization reagent is adopted to treat the titanium-silicon sol precursor, so that the prepared titanium-silicon molecular sieve has mesoporous channels with specific pore diameters and large specific surface area and pore volume.

Pay-off mechanism and pay-off vehicle comprising pay-off mechanism

The invention discloses a pay-off mechanism, and belongs to the technical field of wire barrows, the pay-off mechanism comprises a positioning bottom plate, a supporting unit, a wire leading unit and a buffer unit are fixedly arranged on the positioning bottom plate, the buffer unit comprises two limiting plates fixedly arranged on the bottom plate, two wire guiding wheels are movably arranged on one limiting plate, and the two wire guiding wheels are movably arranged on the other limiting plate. One of the two limiting plates is provided with a wire guiding wheel, the other limiting plate is provided with an anti-disengaging structure for preventing a cable from disengaging from the wire guiding wheel, the limiting plates are provided with sliding grooves, and through the two limiting plates arranged on the bottom plate and the wire guiding wheels arranged on the limiting plates in a sliding mode, when a worker conducts wire guiding, the cable is wound around the two wire guiding wheels ...

Method for preparing dendritic calcium sulfate from gasified ash disposal waste liquid

The invention provides a method for preparing dendritic calcium sulfate whiskers from gasified ash disposal waste liquid, which mainly comprises the following two steps of: 1, preparing calcium sulfate dihydrate, mixing the gasified ash disposal waste liquid with calcium chloride, ageing, and filtering to obtain a calcium sulfate dihydrate wet filter cake, and 2, adding anhydrous calcium sulfate whisker seed crystals into water, adding zinc acetate and ethylene glycol bis (2-aminoethyl ether) tetrasodium tetraacetate as targeted control agents, preparing the dendritic calcium sulfate hemihydrate under the conditions of certain temperature and pressure, filtering, washing and drying to obtain a finished product of the dendritic calcium sulfate hemihydrate. The method is simple to operate and low in cost, the dendritic calcium sulfate hemihydrate whiskers are prepared for the first time, crystals are complete, supporting force is high, and the dendritic calcium sulfate hemihydrate whiskers ...

Novel integrated low -temperature liquid storage tank air feed device

... 本实用新型涉及一种新型集成低温液体储罐供气装置，包括依次相连的低温储罐系统、第一汽化器、调压器、流量计以及加臭装置，其中所述低温储罐系统包括LNG储罐和卸车增压器，所述LNG储罐和卸车增压器通过进液管路相连。本实用新型的新型集成低温液体储罐供气装置用所述低温储罐系统代替传统的杜瓦瓶，用LNG槽车给所述低温储罐系统提供气源，使所述新型集成低温液体储罐供气装置能够不间断地给用户供气。 ...

一种仲辛酮加氢制仲辛醇的方法及其含镍的催化剂

... 一种仲辛酮加氢制仲辛醇的方法及其含镍的催化剂，本发明不含铬和其它任何有害物质，具有优异的催化活性、选择性和良好的稳定性。采用本发明的催化剂和使用固定床液相加氢过程，过程的反应压力为0.5～2MPa，反应温度为100～200℃，液相体积空速为0.1～1h#+[-1]，氢油比为200～2000/1。仲辛酮的转化率达到了99.2％，仲辛醇的选择性为96.0％。 ...

Power transformation structure of railway traction substation

The invention is suitable for the technical field of traction substations, and particularly provides a railway traction substation power transformation structure which comprises a transformer body fixedly arranged in a shell. A ventilation cavity is formed in the shell, a ventilation device is fixedly installed at an opening in the outer side of the ventilation cavity, the ventilation device comprises a protection partition plate, the protection partition plate is fixedly installed at the opening in the outer side of the ventilation cavity through screws, and a groove is formed in the protection partition plate; a channel and two ventilation hole groups are formed in the groove in the length direction of the groove, and the two ventilation hole groups are located on the two sides of the channel; and the heat dissipation assembly is used for blocking the ventilation hole group, so that the ventilation hole group is blocked in rainy days or raised dust weather, and when the ventilation hole ...

Gastric-soluble pulullan-nanocellulose composite hard capsule shell and preparation process thereof

The invention provides a pulullan-nanocellulose composite hard capsule shell and a preparation process thereof. The invention provides a film-forming composition for preparing a gastric-soluble pulullan-nanocellulose composite hard capsule shell, the hard capsule shell prepared from the composition and a preparation method of the hard capsule shell. The composition comprises a dry substance and water, wherein the dry substance is composed of nanocellulose, pullulan, gellan gum and glycerin. Wherein the nanocellulose is obtained by carrying out high-pressure homogenization treatment on cellulose, and the cellulose is anionic nanocellulose of which the length-diameter ratio is greater than 100, the surface charge number is greater than 20mV and the dispersity is less than 0.8. The nanocellulose is used as a reinforcing agent and a bidirectional humectant. The gellan gum is high acyl gellan gum. The composite hard capsule shell is a novel pulullan hard capsule shell, takes nano cellulose as ...

Super-roundness alumina microsphere and preparation method thereof

The invention discloses a super-roundness alumina microsphere and a preparation method thereof.The method comprises the steps that pseudo-boehmite, alumina powder, water and peptizing auxiliaries are heated and stirred to be uniform, and pseudo-boehmite turbid liquid is obtained; adding a peptizing agent into the pseudo-boehmite suspension and uniformly stirring to obtain an aluminum oxide suspension; adding a solution containing a gelling agent into the aluminum oxide suspension, uniformly mixing, dropwise adding a hot oil column for forming, collecting obtained aluminum oxide balls, and curing, washing, drying and roasting the aluminum oxide balls to obtain the aluminum oxide microspheres, according to the method, by adjusting the preparation process of the alumina slurry and improving the hot oil column forming process, the physical characteristics of the obtained alumina microspheres can be effectively controlled, the overall pelletizing rate is high, and conditions are provided for ...

Trypsin stabilizer as well as preparation method and application thereof

The invention discloses a trypsin stabilizer as well as a preparation method and application thereof. The trypsin stabilizer disclosed by the invention is a deep-eutectic solvent prepared from trehalose and betaine in a molar ratio of 1: (7-9). The trypsin stabilizer can maintain the activity of trypsin under the conditions of low temperature, high temperature, strong acid and strong alkali.

Process method for deep hydro-conversion of high aromatic hydrocarbon catalytic cracking diesel oil

The invention discloses a process method for deep hydro-conversion of high aromatic hydrocarbon catalytic cracking diesel oil, and relates to the field of hydrocarbon hydro-conversion processes. The method comprises the following steps: mixing a high aromatic hydrocarbon catalytic cracking diesel oil raw material with hydrogen, feeding the mixture into a reaction zone I for pre-hydrogenation dealkene removal, and feeding the mixture into a reaction zone II for hydrofining treatment; then the mixture enters a reaction zone III to be subjected to adsorption desulfurization-coupling dearomatization treatment, and finally enters a reaction zone IV to be subjected to deep hydrogenation dearomatization treatment, so that the high-cycloalkyl diesel oil with excellent properties can be obtained. The process method has the advantages that the high aromatic hydrocarbon catalytic cracking diesel oil is converted in a deep hydrogenation mode for the first time, jet fuel is obtained or serves as military ...

System for controlling bypass event order operation based on identification and operation method thereof

The invention provides a system for controlling bypass event order operation based on identification and an operation method thereof, and the system comprises a dimension table, an entity item which needs to start a bypass event, and a bypass identification being True; the working characteristic table comprises a bypass working characteristic table; the transaction link table is used for linking the working characteristic table based on the unique number; the dimension table is associated with corresponding entities of the working characteristic table through entity numbers; when the system runs the transaction to any node, the corresponding working characteristic table is expanded, and working data are recorded; and if running to the working characteristic table of which the associated bypass identifier is the True dimension table, switching to the bypass working characteristic table, executing the bypass task until the end, and continuing the main process until the transaction is finished ...

Miniature direct current ion thruster based on glow discharge cathode

The invention discloses a miniature direct-current ion thruster based on a glow discharge cathode, belongs to the field of miniature direct-current ion thrusters, and aims at solving the problems that a traditional hollow cathode in an existing direct-current ion thruster is complex in structure, difficult to miniaturize, high in working temperature, short in service life of a tungsten filament cathode and the like. The device comprises a glow cathode assembly, an anode assembly, a grid assembly, a permanent magnet assembly, a mounting base and a shell, the mounting base is arranged at the bottom opening end of the shell, the permanent magnet assembly, the anode assembly and the glow cathode assembly are sequentially sleeved with the shell from outside to inside, and the grid assembly is arranged on the downstream of the anode assembly; the glow cathode assembly is arranged on the mounting base and extends out of a central hole of the mounting base, working medium gas is primarily ionized ...

Process method for deep hydro-conversion of high aromatic hydrocarbon catalytic cracking diesel oil

The invention provides a process method for deep hydro-conversion of high aromatic hydrocarbon catalytic cracking diesel oil, and relates to the field of hydrocarbon hydro-conversion processes. The method comprises the following steps: mixing a high aromatic hydrocarbon catalytic cracking diesel oil raw material with hydrogen, feeding the mixture into a reaction zone I for pre-hydrogenation dealkene removal, and feeding the mixture into a reaction zone II for hydrofining treatment; then the diesel oil enters a reaction zone III to be subjected to hydrogenation dearomatization treatment, is subjected to adsorption desulfurization in a reaction zone IV and then enters a reaction zone V to be subjected to supplementary refining, and hydro-converted diesel oil with excellent properties can be obtained. The process method has the advantages that the high-aromatic-hydrocarbon catalytic cracking diesel oil is converted in a deep hydrogenation mode for the first time, the inferior diesel oil can ...

LNG air feeder

... 本实用新型涉及一种LNG供气装置，所述LNG供气装置包括依次相连的杜瓦瓶组、第一汽化器、调压器、流量计以及加臭装置，其中在所述第一汽化器和所述调压器之间设有第一安全阀，所述调压器包括调压管路和旁通管路，所述调压管路设有调压阀，所述旁通管路设有第二安全阀，所述第一安全阀和所述第二安全阀连接放气管道。本实用新型提供的LNG供气装置每个环节均设置有安全阀，在各个环节的压力超过预设值时，安全阀自动开启，降低压力，确保整个系统的安全性。 ...

Compressor piston pole

... 本实用新型涉及一种压缩机活塞杆，其特征在于所述压缩机活塞杆包括：活塞部，所述活塞部设置于所述压缩机活塞杆的一端，用于安装活塞；中空结构，所述中空结构设置于所述压缩机活塞杆另一端的内部，所述中空结构与所述压缩机活塞杆同轴心；活塞杆冷却管部件，设置于所述中空结构内部；以及活塞杆冷却管堵头。本实用新型的压缩机活塞杆是高强度的金属材料，导热性能很好，内部设置中空结构，中空结构内部设置活塞杆冷却油管，活塞杆冷却油管内部设有冷却油。密封环与活塞杆摩擦产生的热量，很容易从活塞杆传导到冷却油中，对活塞杆进行冷却，直接降低摩擦表面温度，冷却效果好。 ...

一种馏分油深度加氢处理的催化剂及其制备方法

The present invention relates to a catalyst for overhydrogenation treatment of distillate oil, specially for treating low-grade diesel oil (for example, high-sulfur naphthenic base straight-run diesel oil, coker diesel oil, coker cracked diesel oil or their mixture), and the treated diesel oil can be used as blending component of high-grade diesel oil. Said catalyst is formed from composite carrier which is obtained by high-temp. roasting the mixture of diaspore which is made up by means of alkylaluminium or oxyalkylaluminium hydrolysis method and whose purity is greater than 70% and zeolite exchanged with cation, phosphorus and active components of nickel and molybdenum, etc. and its composition includes (wt%) 2.5-8.0% of nickel oxide, 10-30% of molybdenum oxide, 0.2-4.0% of phosphorus and the rest is composite carrier.

Phosphoric acid compound modified activated carbon supported metal catalyst as well as preparation method and application thereof

The invention discloses a phosphoric acid compound modified activated carbon supported metal catalyst as well as a preparation method and application thereof, and relates to the technical field of hydrogenation catalytic conversion. The method specifically comprises the following steps: (1) carrying out thermal reaction on a phosphoric acid solution and activated carbon, and washing until the pH value of a washing solution is 6-7; (2) impregnating a metal precursor on the surface of the modified carrier; (3) drying and roasting the carrier loaded with the metal; and (4) carrying out reduction, vulcanization or phosphating treatment on the roasted metal-loaded activated carbon to obtain the phosphoric acid compound modified activated carbon-loaded nickel catalyst. The number of oxygen-containing groups on the surface of the active carbon can be increased by adopting the phosphoric acid compound for modification, the average particle size of active metal is reduced, and the dispersity of ...

四硫代钼酸铵的制备方法

The present invention relates to improved preparation process of high purity chemical. High purity ammonium tetrathiomolybdate is prepared through the reaction between ammonium para-molybdate or molybdenum trioxide and ammonium sulfate solution. Preparing high purity ammonium tetrathiomolybdate in the said process of the present invention has ammonium sulfate amount near the required stoichiometric amount, mild reaction condition, short reaction period, less waste exhaust, high product yield, high product purity, and no need of treating virulent and effluvial hydrogen sulfide gas.

Phase-change energy-storage trans-butadiene-isoprene rubber material with high crystallization melting temperature and preparation method of phase-change energy-storage trans-butadiene-isoprene rubber material

The invention discloses a trans-butadiene-isoprene rubber material with a high crystallization melting temperature and a preparation method of the trans-butadiene-isoprene rubber material. The trans-butadiene-isoprene rubber material is prepared from the following components in parts by weight: 100 parts of butadiene-isoprene copolymer, 0-50 parts of filler, 0.1-4 parts of anti-aging agent, 0.1-4 parts of chelating agent and 0.1-6 parts of other auxiliaries. Wherein the butadiene-isoprene copolymer contains a long trans-1, 4-polybutadiene long chain segment, the content of a trans-1, 4-structure of the butadiene-isoprene copolymer is greater than 85%, the crystallization melting temperature is 120-145 DEG C, and the crystallization melting enthalpy is 1-30 J/g. According to the trans-butadiene-isoprene rubber material, a high-temperature-resistant and easy-to-crystallize copolymer is obtained by adopting a constant-ratio copolymerization method of butadiene and isoprene, and then a chelating ...

一种馏分油深度加氢精制的催化剂及其制备方法

The present invention relates to a catalyst for overhydrogenation treatment of distillate oil and its preparation method. It is specially applicable to low-grade diesel oil (for example, high-sulfur naphthenic base straight-run diesel oil, coker diesel oil, coker cracked diesel oil or their mixture). The treated diesel oil can be used as blending component of the high-grade diesel oil. Said catalyst is formed from carrier obtained by high-temp. roasting the diaspore made up by using alkylaluminium or oxyalkylaluminium through hydrolysis process and whose purity is greater than 70%, fluorine adjuvant, phosphorus and active components of nickel and molybdenum etc. and is made up by adopting special preparation process.

Supporting device for rail transit ultra-low clearance contact net

The invention is suitable for the technical field of rail transit, and provides a rail transit ultralow clearance contact net supporting device which comprises a supporting beam assembly, one end of the supporting beam assembly is installed on a lifting base through a supporting mechanism, and the lifting base is fixedly installed on a stand column; the other end of the supporting beam assembly is provided with a guide wheel used for supporting the overhead line system. When the supporting mechanism does not need to be adjusted, a limiting pin abuts against the interior of a limiting clamping groove, the effect of limiting rotation of a supporting gear is achieved, meanwhile, a limiting toothed rod abuts against the interior of a limiting toothed ring, the effect of limiting rotation of a lead screw is achieved, and the stability of the whole structure of the supporting mechanism when the supporting mechanism is not used is guaranteed; by adjusting the position of the movable tooth holder ...

Double-cavity bioelectrochemical anaerobic fermentation system and use method thereof

The invention discloses a double-cavity bioelectrochemical anaerobic fermentation system and a using method thereof, and relates to the field of biological energy, the double-cavity bioelectrochemical anaerobic fermentation system comprises a direct current power supply, an anaerobic reactor and a gas collector, the anaerobic reactor is provided with two reaction cavities, and the two reaction cavities are isolated through an ion exchange membrane; the two reaction cavities are respectively connected with the two gas collectors through gas guide pipes, the two electrodes connected with the direct-current power supply are respectively inserted into the two reaction cavities, the electrodes are connected with the direct-current power supply through wires, and the electrodes are respectively an anode and a cathode. According to the method, the anaerobic fermentation time can be shortened in the anaerobic digestion and biological energy regeneration process, the raw material treatment efficiency ...

Method for constructing electroactive corynebacterium glutamicum

The invention discloses a method for constructing electro-active corynebacterium glutamicum, relates to the field of fermentation, and particularly relates to a method for constructing electro-active corynebacterium glutamicum, which comprises the following steps: obtaining mtrC, mtrA and mtrB gene segments of shewanella MR-1 through PCR (Polymerase Chain Reaction) amplification, linearizing a plasmid vector pEC-XK99E, carrying out homologous recombination on the linearized plasmid pEC-XK99E and the mtrC, mtrA and mtrB segments, introducing the constructed recombinant segments into escherichia coli, and constructing the electro-active corynebacterium glutamicum. And further infecting corynebacterium glutamicum with the escherichia coli transformant to obtain the electroactive corynebacterium glutamicum. The bacterial colony PCR verifies that the electro-active corynebacterium glutamicum is successfully prepared, and the electro-activity test proves that the electro-activity of the genetically ...

用于中间馏分油深度加氢处理的含分子筛催化剂及其制备方法

The present invention relates to a catalyst containing molecular sieve for overhydrogenation treatment of intermediate distillate oil, specially for treating low-grade diesel oil (for example, high-sulfur naphthenic base straight-run diesel oil, corer diesel oil, coker cracked diesel oil or their mixture), and the treated diesel oil can be used as blending component of high-grade diesel oil. Saidcatalyst is formed from carrier obtained by high-temp. roasting the mixture of the domestic macroporous and mesoporous diaspore made up by using aluminium sulfate through carbon dioxide preciptiationprocess and zeolite exchange with cation, phosphorus and active components of nickel and molybdenum etc.