Production method of novel slow release urea-formaldehyde compound fertilizer

The invention discloses a production method of a novel slow release urea-formaldehyde compound fertilizer, which comprises the following steps: (1) mixing a potassium hydrogen sulfate solution and phosphoric acid to generate mixed acid slurry; (2) ammoniating to pre-neutralize the mixed acid slurry, and then adding urea-formaldehyde slurry; (3) ammoniating to neutralize the obtained slurry, and granulating by carrying out atomization spray in a granulation device; and (4) after the granulation process, producing the required product by using the conventional technology. The product produced by using the method has uniform and stable quality, smooth particles, good color degree, high strength and obvious slow release effect, is white in color, is difficult to agglomerate, and can meet the nutrient demands of different crops at different growth periods, thereby ensuring that the nutrient release amounts are basically in agreement with the nutrient demands of the crops at different growth ...

Infrared video image maximum temperature point indicating device

The utility model provides an infrared video image maximum temperature point indicating device, includes treater, character stack chip, power supply circuit, the treater passes through UART serial ports and infrared core communication, the video input of infrared core video output mouth and character stack chip is connected, the treater passes through SPI serial ports and the communication of character stack chip, the video output mouth of character stack chip connects the monitor, power supply circuit includes two power supply chips, and one of them power supply chip is responsible for turning into 5V's direct current output from 9-12V's direct current, and another power supply chip is responsible for turning into 3.3V's direct current output from 5V's direct current. The device can be on the video audio -visual position and the temperature value of seeing maximum temperature point, rock or maximum temperature point when moving when infrared core, have individual cursor following always ...

Deep sea salvage drilling device based on ROV and use method of deep sea salvage drilling device

The invention discloses a deep sea salvage drilling device based on an ROV and a using method of the deep sea salvage drilling device, and relates to the technical field of deep sea salvage drilling devices.The drilling device comprises a clamping device, a footage pressure unit connected to the clamping device and a drilling unit connected to the footage pressure unit; the clamping device is provided with a clamping cavity used for clamping a deep sea object to be salvaged. Wherein the drilling unit is provided with a cutting drill, the cutting drill is used for cutting and punching the deep sea object to be fished, and the footage pressure unit is used for providing cutting and punching pressure for the drilling unit. The compact type deep sea drilling device integrating the drilling unit, the footage pressure unit and the clamping device has the advantages of being small in size, high in underwater functional reliability, high in corrosion resistance, flexible and stable in work, capable ...

Anthropomorphic robot autonomously dancing along with rhythm

The invention relates to an anthropomorphic robot autonomously dancing along with rhythm. The brain of the robot is provided with an embedded computer system with musical rhythm recognition capability. The embedded computer system mainly comprises a hearing subsystem, a rhythm recognition subsystem and a dancing movement combination subsystem; wherein, the hearing subsystem obtains external played music by a sensor and converts the music into digital music signals which serve as the input of the rhythm recognition subsystem; the rhythm recognition subsystem processes the digital music signalsand obtains the rhythm of the music and the characters of beats which comprises beats per minute and the beginning time of beats; the dancing movement combination subsystem autonomously combines dances according to the rhythm characters obtained by the rhythm recognition subsystem; the three subsystems process in parallel in the mode of a production line to cause the robot to autonomously dance along ...

Sound cavity apparatus

The sound cavity device includes one main body, and inside the main body, there are front sound cavity, loudspeaker holding cavity communicated with the front sound cavity and back sound cavity. The main body has also sound exit, through which the front sound cavity is communicated outwards. The front sound cavity is located in the middle of the back sound cavity and has one closed end to form one narrow passage together with one side wall of the main body and to separate the back sound cavity into two communicated parts. Compared with available technology, the present invention has the features of simple and reasonable structure, high sound broadcasting quality, excellent bass effect, etc.

Apparatus for improving nitrogen content of spray granulation compound fertilizer and method for producing high-nitrogen compound fertilizer

The invention provides a device for improving nitrogen content of spray granulation compound fertilizer, which comprises a spray granulation dryer, the inside of the spray granulation dryer is provided with a spray area, granulation areas, drying areas and a sieving area in turn. The head of the dryer is connected with a spray pipe with a spray gun, a secondary granulation area and a secondary drying area are arranged between a primary drying area and the sieving area, and a high nitrogen solution spray pipe passes through the secondary granulation area, the secondary drying area and the sieving area, is connected to the dryer tail, and is used for spraying high nitrogen solution to the spray granulation dryer. Another aim of the invention is to provide a method for producing high-nitrogen sulfonyl NPK compound fertilizer, which comprises the following steps: 1) mixing acid, 2) preparing the high nitrogen solution, 3) granulating, 4) drying twice, and 5) sieving. The method can improve ...

Input signal voltage detection module and method, and related data transmission system

Near-seabed mobile detection and fidelity sampling system

The invention discloses a near-seabed mobile detection and fidelity sampling system which comprises a fixed frame, and the fixed frame is provided with a bearing head, a buoyancy block, a hydraulic power system, a monitoring system, a sampling system and a sensor system used for monitoring and recording scientific data in real time. The hydraulic power system is provided with propellers which are arranged in a vector mode and can control horizontal propelling and vertical propelling. The monitoring system is used for carrying out visible real-time operation and three-dimensional comprehensive detection on the seabed; the sampling system comprises a sediment sampler for performing low disturbance or packaging on deep sea in-situ sediment, a bottom water sampler with deep sea in-situ low disturbance pressure maintaining and stable independent sampling technologies, and a pore water sampler with deep sea in-situ pore water pressure maintaining sampling. The system has high-precision mobile ...

Light concentration S-based compound fertilizer produced by spray slurry and granulation

The invention relates to a sulfur-based compound fertilizer by means of chemical synthesis and spray granulation using nitrogen, phosphor and potassium as main nutrients, in particular to a low concentration sulfur-based compound fertilizer by means of spray granulation comprising the following steps: adding fillers in a neutralization reaction slurry produced by a potassium sulfate compound fertilizer, mixing and stirring uniformly the mixture, getting the low concentration sulfate-based compound fertilizer after granulation by a granulator, wherein the filler is one or two selected from white detergent powder and attapulgite, the weight ratio of slurry and filler according to the dry stuff is 100: 10-30. The beneficial effects of the invention comprise improving the crop absorption efficiency, avoiding the nutrient waste and loss, reducing the release speed of the sulfur-based compound, improving the effective release time of the fertilizer and facilitating the absorption and utilization ...

Device capable of measuring depth of river channel

The utility model discloses a device capable of measuring the depth of a riverway, which comprises a base plate and a telescopic assembly fixed on the side wall of the base plate, a supporting block is fixed on an output shaft of the telescopic assembly, a protective shell is fixed on the upper end face of the supporting block, a rotating rod is rotatably arranged in the protective shell, and a flexible rule is wound on the rotating rod. A steel ball is fixed to the lower end face of the flexible rule, a first hand crank is fixed to the end face of the protection shell, the rotating rod penetrates through the side wall of the protection shell to be fixedly connected with the hand crank, a flexible rule channel pipe is fixed to the side wall of the protection shell, sliding blocks are symmetrically and slidably arranged on the side wall of the flexible rule channel pipe, and clamping rods are symmetrically arranged on the side walls of the lower ends of the sliding blocks. The end, close ...

Sound cavity apparatus

The sound cavity device includes one main body, and inside the main body, there are front sound cavity, loudspeaker holding cavity communicated with the front sound cavity and back sound cavity. The front sound cavity and the back sound cavity have volume ratio of 1 to 2-4. The main body has also sound exit, through which the front sound cavity is communicated outwards. The front sound cavity is located in the middle of the back sound cavity and has one closed end to form one narrow passage together with one side wall of the main body and to separate the back sound cavity into two communicated parts. Compared with available technology, the present invention has the features of simple and reasonable structure, high sound broadcasting quality, excellent bass effect, etc.

Gallium nitride-based laser epitaxial structure and laser with same

The invention discloses a gallium nitride-based laser epitaxial structure and a laser with the same, and relates to the field of semiconductor optoelectronic devices. By designing the active region structure and the epitaxial growth method of the gallium nitride-based laser, the crystal quality of the active region and the injection efficiency of carriers into the active region are effectively improved, and meanwhile, by designing the novel optical waveguide layer structure and the growth method, the internal loss is effectively reduced on the basis of improving the light field limiting effect. In addition, other layers of structures of the epitaxial structure of the gallium nitride-based laser are further designed, the light field limiting effect is further improved, and the internal loss of the laser is reduced.

Anthropomorphic robot autonomously dancing along with rhythm

The invention relates to an anthropomorphic robot autonomously dancing along with rhythm. The brain of the robot is provided with an embedded computer system with musical rhythm recognition capability. The embedded computer system mainly comprises a hearing subsystem, a rhythm recognition subsystem and a dancing movement combination subsystem; wherein, the hearing subsystem obtains external played music by a sensor and converts the music into digital music signals which serve as the input of the rhythm recognition subsystem; the rhythm recognition subsystem processes the digital music signals and obtains the rhythm of the music and the characters of beats which comprises beats per minute and the beginning time of beats; the dancing movement combination subsystem autonomously combines dances according to the rhythm characters obtained by the rhythm recognition subsystem; the three subsystems process in parallel in the mode of a production line to cause the robot to autonomously dance along ...

Downloading method and device for page sub-resource

The invention provides a downloading method and device for a page sub-resource. The method provided by the embodiment of the invention comprises the steps of obtaining the page identification information to be downloaded of a page, and obtaining the identification information, corresponding to the page identification information, of at least one page sub-resource according to the page identification information, so the at least one page sub-resource can be downloaded according to the identification information of the at least one page sub-resource. As the downloading of the page sub-resource does not rely on the downloading and analysis of a page main resource, the problem that the downloading speed of the page resource is slower caused by the fact in the prior art, the page sub-resource is not downloaded till an URL (uniform resource locator) of the page sub-resource is analyzed in the main resource analyzing process is avoided, so the downloading speed of the page resource is improved ...

Sound cavity apparatus

The sound cavity device includes one main body, and inside the main body, there are front sound cavity, loudspeaker holding cavity communicated with the front sound cavity and back sound cavity. The main body has also sound exit, through which the front sound cavity is communicated outwards. The front sound cavity is located in the middle of the back sound cavity and has one closed end to form onenarrow passage together with one side wall of the main body and to separate the back sound cavity into two communicated parts. Compared with available technology, the present invention has the features of simple and reasonable structure, high sound broadcasting quality, excellent bass effect, etc.

Primer composition for detecting drug-resistant gene and application thereof

The invention discloses a primer composition for detecting drug-resistant genes and application thereof, the primer composition comprises a primer A and a primer B. The primer A is selected from primer pairs 1-2, and the primer B is selected from primer pairs 3-5; the primer pair 1 is a primer of which the nucleotide sequence is as shown in SEQ ID NO.1-2; the primer pair 2 is a primer of which the nucleotide sequence is as shown in SEQ ID NO.3-4; the primer pair 3 is a primer of which the nucleotide sequence is as shown in SEQ ID NO.5-6; the primer pair 4 is a primer of which the nucleotide sequence is as shown in SEQ ID NO.7 to SEQ ID NO.8; the primer pair 5 is a primer of which the nucleotide sequence is as shown in SEQ ID NO.9 to SEQ ID NO.10. The primer provided by the invention has the advantages of strong specificity, high sensitivity, simple operation process for detection and low cost, can rapidly and accurately detect the multi-drug-resistant gene from an environmental sample with ...

Deep sea salvage clamp device based on ROV and use method of deep sea salvage clamp device

The invention discloses a deep sea salvage clamp device based on an ROV and a using method of the deep sea salvage clamp device, and relates to a special clamp device for deep sea salvage, the deep sea salvage clamp device comprises a main body frame, an elastic hook tool unit and a rigid telescopic hook tool unit, the elastic hook tool unit is provided with a plurality of arc-shaped hook tools arranged along one side of the main body frame, and the arc-shaped hook has an elastic moving space in the direction perpendicular to the clamped salvaged object. The rigid telescopic hook tool unit is provided with a plurality of telescopic pipe hook tools arranged along the other opposite side of the main body frame, and the telescopic pipe hook tools have adjustable displacement in the direction perpendicular to the clamped salvaged object. According to the deep-sea salvage clamp device, the existing deep-sea salvage operation experience is combined, the powerful expansion capacity of the ROV ...

Production method for ammoniated sulfur-based compound fertilizer by chemical synthesis

The invention relates to a production method for ammoniated sulfur-based compound fertilizer by chemical synthesis, comprising the following steps: generating potassium bisulfate by the reaction of sulfuric acid and potassium chloride; mixing phosphoric acid and potassium bisulfate to generate a mixed acid; adding ammonia into the mixed acid to be pre-neutralized; neutralizing the pre-neutralizedslurry with the ammonia; atomizing to spray the slurry by heat released by neutralization; and spraying slurry, introducing in ammonia and pelleting by adding urea. According to the product produced by the technology, the nitrogen content of the compound fertilizer can be improved by above 4%, and the compound fertilizer has small possibility of blocking; in addition, the amount of potassium can be kept to be above 14.5%; the compound fertilizer which contains 48% total nutrition and over 14.5% of each single nutrition, can satisfy nitrogen16-phosphorus 16-potassium 16 marking requirements and conforms ...

Apparatus for improving nitrogen content of spray granulation compound fertilizer and method for producing high-nitrogen compound fertilizer

The invention provides a device for improving nitrogen content of spray granulation compound fertilizer, which comprises a spray granulation dryer, the inside of the spray granulation dryer is provided with a spray area, granulation areas, drying areas and a sieving area in turn. The head of the dryer is connected with a spray pipe with a spray gun, a secondary granulation area and a secondary drying area are arranged between a primary drying area and the sieving area, and a high nitrogen solution spray pipe passes through the secondary granulation area, the secondary drying area and the sieving area, is connected to the dryer tail, and is used for spraying high nitrogen solution to the spray granulation dryer. Another aim of the invention is to provide a method for producing high-nitrogen sulfonyl NPK compound fertilizer, which comprises the following steps: 1) mixing acid, 2) preparing the high nitrogen solution, 3) granulating, 4) drying twice, and 5) sieving. The method can improve ...

Sound cavity apparatus

The sound cavity device includes one main body, and inside the main body, there are front sound cavity, loudspeaker holding cavity communicated with the front sound cavity and back sound cavity. The front sound cavity and the back sound cavity have volume ratio of 1 to 2-4. The main body has also sound exit, through which the front sound cavity is communicated outwards. The front sound cavity is located in the middle of the back sound cavity and has one closed end to form one narrow passage together with one side wall of the main body and to separate the back sound cavity into two communicatedparts. Compared with available technology, the present invention has the features of simple and reasonable structure, high sound broadcasting quality, excellent bass effect, etc.