Tanning fur/feather sewage treatment method

The invention belongs to the technical field of sewage treatment, and particularly relates to a tanning fur/feather sewage treatment method. The method comprises the following steps: tanning fur/feather sewage flows through a fur fetching machine, a coarse grid and a fine grid to remove large solids and fur from water, and enters an electrolytic bath to subjected to electrolysis and oxidation; the sewage subjected to electrolytic oxidation enters a primary flocculating precipitation tank to be subjected to chemical precipitation, and the water subjected to chemical precipitation sequentially enters a primary aerobic tank, a primary precipitation tank, a secondary aerobic tank, a secondary precipitation tank, a tertiary aerobic tank, a tertiary precipitation tank, a quaternary aerobic tank and a quaternary precipitation tank; and the effluent water from the quaternary precipitation tank enters a secondary flocculating precipitation tank to be subjected to chemical precipitation, and is subjected ...

Data processing method and system

The invention discloses a data processing method and system, and the method comprises the steps: obtaining freight rate data and rule data in a non-effective state, determining calculation data corresponding to the freight rate data, carrying out the simulation freight rate calculation of the calculation data through the rule data, obtaining a simulation freight rate calculation result, and if the simulation freight rate calculation result does not accord with a preset expected result, carrying out the simulation freight rate calculation. And correcting the simulated freight rate calculation result which does not conform to a preset expected result through the actual price of the freight rate data, and obtaining and displaying target freight rate data until the simulated freight rate calculation result conforms to the preset expected result. Before the freight rate data is not published to a sales system, a simulated freight rate calculation result is obtained through simulated freight ...

Inflatable butterfly valve

The invention discloses an inflatable butterfly valve. The inflatable butterfly valve is provided with a valve seat, a valve shaft installed on the valve seat and a butterfly plate component. The valve seat is provided with a medium channel provided with a central line in the axial direction of the valve seat. The valve shaft is provided with a rotation axis which extends and passes through the central line. The butterfly plate component is fixed to the valve shaft and arranged inside the medium channel. An extension portion with a valve shaft installation channel arranged internally is arranged above the valve seat. A pneumatic actuator installation flange is arranged at the free end of the extension portion and provided with a pneumatic actuator, and a driving shaft of the pneumatic actuator is connected with the valve shaft. An annular embedding body made of an elastic material is embedded in the inner wall of the valve seat in the circumferential direction and provided with two embedded ...

Non-phosphorus scale and corrosion inhibitor employing seawater as circulating cooling water, and preparation method thereof

The invention belongs to the technical field of water treatment, and particularly relates to a non-phosphorus scale and corrosion inhibitor employing seawater as circulating cooling water and a preparation method thereof. The non-phosphorus scale and corrosion inhibitor is prepared from the following raw materials by weight percent: 2-6% of a mannich alkali quaternary ammonium salt, 5-20% of an aconitic acid-allyl sulfonate copolymer, 4-10% of a polyepoxysuccinic acid, 1-5% of a natural corrosion inhibitor, 5-15% of sodium gluconate, 3-5% of heptahydrate, 0.6-1.1% of BTA, and the balance of deionized water. The non-phosphorus scale and corrosion inhibitor has high scale and corrosion inhibitor performances, the problems of corrosion and scaling of the seawater as the circulating cooling water can be solved, and the non-phosphorus scale and corrosion inhibitor is especially suitable for various circulating water systems employing copper, carbon steel and stainless steel as materials, is ...

Phosphorus-free scale and corrosion inhibitor and preparation method thereof

The invention belongs to the technical field of water treatment and particularly relates to a phosphorus-free scale and corrosion inhibitor and preparation method thereof. The phosphorus-free scale and corrosion inhibitor is prepared from following raw material comprising, by weight, 5-10% of acrylamide, 8-12% of diallyldimethylammonium chloride, 0.1-0.5% of potassium persulfate, 2-3% of hexamethylene tetramine, 5-10% of hydrolytic polymaleic anhydride, 1-2% of benzotriazole and the balance deionized water. The preparation method includes following steps: filling a reaction kettle with the acrylamide and the diallyldimethylammonium chloride according to a proportion, starting a stirring operation, increasing a temperature to 70-80 DEG C, adding the potassium persulfate according to the proportion, carrying out a reaction for 3-4 hours, adding the hexamethylene tetramine according to the proportion, maintaining the temperature for 2-3 hours, decreasing the temperature to room temperature ...

Back cavity gap antenna

The invention provides a back cavity gap antenna with a dielectric resonator structure. According to the technical scheme, the back cavity gap antenna comprises a metal back cavity, two layers of dielectric substrates, two dielectric resonators and an antenna feeder, wherein the metal back cavity is of a cuboid structure, and a rectangular-section groove is formed in the center of the surface of the metal back cavity; the two layers of dielectric substrates are both rectangular single-side copper clad structures; the two layers of dielectric substrates are fixed to the face, with the groove, of the metal back cavity after the non-copper-clad faces of the two layers of dielectric substrates overlap. The antenna feeder is sandwiched between the two layers of dielectric substrates through clad copper. A rectangular gap is formed in the center of the copper clad face of each layer of dielectric substrate through metal etching. The two dielectric resonators are fixed to the portions, without ...

Method for recovering tail gas generated by tetrafluoroethylene

U888 signal system vehicle-mounted ATC and vehicle interface debugging box

The invention discloses a U888 signal system vehicle-mounted ATC and vehicle interface debugging box, and the debugging box comprises a power supply module which is used for supplying power to a pure output module of the debugging box; the pure input module is used for turning on a corresponding indicating lamp on the debugging box by operating vehicle external equipment and giving out an input function signal; the pure output module is provided with a control switch through a debugging box, so that the electric signal is transmitted to vehicle equipment, and an output function signal is given; an external electric signal is collected and input through a control switch of the debugging box and then is output to the outside through the debugging box, and a driving control function signal is collected; the ATP/ATO function is effectively debugged, static testing is carried out on connecting lines and functions related to train signals, equipment short circuit and damage caused by train wiring ...

Biocide-algaecide for circulating water and preparation method thereof

The invention belongs to the technical field of water treatment chemicals and in particular relates to a biocide-algaecide for circulating water and a preparation method thereof. The biocide-algaecide is prepared from the following materials in percentage by weight: 6%-50% of polyethylether dichloride tetramethyl ethylene diamine, 8%-20% of hydrogen peroxide, 0.3%-2% of fatty alcohol-polyoxyethylene ether, 0.5%-8% of hydroxyethane diphosphonic acid and the balance of deionized water. The preparation method of the biocide-algaecide comprises the following steps: adding deionized water, the polyethylether dichloride tetramethyl ethylene diamine, the fatty alcohol-polyoxyethylene ether, the hydroxyethane diphosphonic acid and the hydrogen peroxide into the same reaction kettle according to component content in sequence, and stirring for 30-60 minutes at a temperature of 10 DEG C-35 DEG C. According to the invention, the special-purpose biocide-algaecide for a water system of circulating water ...

Flue gas desulfurization synergistic agent and preparation method thereof

The invention belongs to the technical field of flue gas desulfurization and in particular relates to a flue gas desulfurization synergistic agent and a preparation method thereof. The flue gas desulfurization synergistic agent is prepared from the following raw materials in percentage by weight: 10-60 percent of piperazine, 8-20 percent of tributanolamine, 10-20 percent of fatty acid macrogol ester and the balance being deionized water. The preparation method comprises the following steps: sequentially adding the deionized water, piperazine, tributanolamine and fatty acid macrogol ester into a reaction kettle according to the content of the components, and stirring at the temperature of 10 to 35 DEG C for 30-60 minutes, thereby obtaining the synergistic agent. The flue gas desulfurization synergistic agent provided by the invention is low in cost and small in usage amount, the desulfurization efficiency of limestone slurry can be obviously improved, and the operating cost of a limestone-gypsum ...

Back-cavity slot antenna array

The invention provides a back-cavity slot antenna array on the basis of SIW process and dielectric harmonic device structure. The back-cavity slot antenna array comprises a metal back cavity, two layers of dielectric substrates, an SIW feed network, a wired feed network and a plurality of dielectric harmonic device sets, the metal back cavity is of a cuboid structure, a plurality of rectangular section grooves which are identical and uniformly distributed in the surface of the metal back cavity, the SIW feed network is fixed on the lower surface of a cuboid, the dielectric substrates after being overlapped are fixed on one face, where the grooves are formed, of the metal back cavity, the wired feed network is sandwiched between the dielectric substrates and electrically connected with the SIW feed network through a coaxial probe, and each dielectric harmonic device set comprises two dielectric harmonic devices which are overlapped and fixed on the dielectric substrates. The back-cavity ...

Oil groove cover for preventing oil mist leakage of large thrust bearing

The invention discloses an oil groove cover for preventing oil mist leakage of a large thrust bearing of a hydropower station. The oil groove cover comprises an oil groove cover body, a sealing assembly arranged on the oil groove cover body and a cooling assembly arranged on the lower surface of the oil groove cover body. The sealing assembly comprises a first sealing cabin, sealing teeth are arranged at the end of the side wall of the first sealing cabin, the side wall of the first sealing cabin is connected with the peripheral face of a thrust head of the thrust bearing in a sealed mode through the sealing teeth, and a first sealing cavity is defined. High-pressure gas is introduced into the first sealing cavity; the cooling assembly comprises a condensation pipe, the lower surface of the oil groove cover body passes through the condensation pipe, cooling liquid flows in the condensation pipe, one end of the condensation pipe is communicated with a liquid inlet of a cooling machine, and ...

High-reliability PERC battery piece back electrode silver paste and preparation method thereof

The invention relates to the technical field of H01L31/0224, in particular to high-reliability PERC battery piece back electrode silver paste and a preparation method thereof. The high-reliability PERC battery piece back electrode silver paste comprises the following components in parts by weight: 56-65 parts of spherical silver powder, 1-2 parts of glass powder, 0.05-0.3 part of an inorganic auxiliary agent and the balance of an organic adhesive, totaling 100 parts. According to the invention, a certain amount of the inorganic auxiliary agent is added, and the aging tensile force is obviously improved under the condition that the inorganic auxiliary agent and the glass powder are ensured to be in a certain weight ratio and the same condition that a battery piece protective film is not damaged.

Bluetooth speaker thermos cup

The utility model discloses a bluetooth speaker thermos cup, including cup body and bowl cover to and the bluetooth speaker module of selectivity setting on cup body or bowl cover, the bottom of cup body and each shaping of top of bowl cover have the necking down of the confession bluetooth speaker module connection usefulness that the shape is the same with the size, by this, combine together bluetooth speaker with the thermos cup, not only can work as the thermos cup that drinks water and use, still can broadcast the music, have expanded and have enriched the functional of thermos cup and used the interest.

Preparation method of efficient flocculant

The invention relates to the technical field of water treatment flocculants, and discloses a preparation method of an efficient flocculant. The polymer organic flocculant is triethanolamine, etidronic acid, JQL-01 chitosan quaternary ammonium salt, ethylene glycol and fatty alcohol-polyoxyethylene ether (JFC), and the inorganic flocculant is a mixture of aluminum sulfate and ferrous sulfate. The flocculant is wide in applicable water quality range, high in efficiency, simple to operate, capable of being directly added by a pump or added after dilution, small in adding amount, free of corrosion to equipment, free of adverse effects on the process, capable of removing COD (chemical oxygen demand) of raw water, resistant to high temperature and acid and alkali, and capable of ensuring that the content of suspended matters in effluent of a clarifier is less than or equal to 50mg/L after 50-500mg/L of the flocculant is added when the pH value is 5.0-9.0, the concentration of suspended matters ...