Biogas slurry safe application method and device for improving capacity of shajiang black soil and reducing application of nitrogen fertilizer

Abstract

The invention relates to the technical field of biogas slurry fertilization, in particular to a biogas slurry safe application method and device for improving the capacity of shajiang black soil and reducing application of nitrogen fertilizer, the device comprises a crawler chassis for moving, a pesticide box assembly is installed at the top of the crawler chassis, and the pesticide box assembly comprises a box body for loading biogas slurry; a rubber sheet is fixedly installed at the position, close to the bottom, of the inner side of the box body, a plurality of protruding blocks used for stirring the rubber sheet to shake biogas slurry are installed below the rubber sheet, a liquid outlet pipe communicated with a liquid inlet pipe of a water pump is installed on the inner side of the box body, and a spiral plate is movably installed on the inner side of the liquid outlet pipe. The convex blocks push the rubber sheets upwards in sequence, so that the rubber sheets shake in a wave shape, then the biogas slurry shakes, the surface of the lime concretion black soil is uneven and high in hardness, and self-shaking of the crawler chassis is matched with wave-shaped shaking of the rubber sheets, so that the biogas slurry in the box body is not prone to precipitation and can be sprayed at any time, time is saved, and spraying is uniform.

Description

Technical Field

[0001] The invention relates to the technical field of biogas slurry fertilization, and in particular to a biogas slurry safe application method and device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application. Background Art

[0002] Shajiang black soil is a semi-hydromorphic soil formed mainly by local factors and biological factors under the semi-humid climate conditions of the warm temperate zone. Its profile configuration is a black soil layer, a subsurface layer and a Shajiang layer. It is mainly distributed in the Huaibei Plain in the southern part of the Huanghuai Plain in China. In order to improve the soil, scientific fertilization is needed, and biogas slurry fertilization is one of the fertilization methods. Biogas slurry fertilizer is rich in nitrogen, phosphorus, potassium and other nutrients, which are the main nutrient requirements for crop growth and can promote the growth and development of crops. However, there are certain areas of improvement in its specific operation.

[0003] Biogas slurry is the residual liquid produced by biogas fermentation of organic waste such as human and animal feces and crop straw. Biogas slurry may contain some impurities. If these impurities are not filtered, they may clog the nozzle of the sprayer and affect the spraying effect. Impurities may also damage the leaves of crops and reduce fertilizer efficiency. Therefore, biogas slurry needs to be finely filtered several times before filling, which affects the overall fertilization efficiency. Furthermore, after the biogas slurry is filled and transported to the field for spraying, the effective ingredients inside the biogas slurry are prone to precipitate, causing uneven subsequent spraying, affecting the normal growth of crops, and may cause differences in the growth rate of crops in different areas, making it inconvenient to harvest at the same time. Summary of the invention

[0004] In response to the above problems, the present application provides a safe application device for sludge liquid for improving the production capacity of sand ginger black soil and reducing the application of nitrogen fertilizer, which solves the problem that the sludge liquid needs to be finely filtered multiple times before filling, affecting the overall fertilization efficiency, and the effective ingredients in the sludge are easily precipitated during transportation, resulting in uneven subsequent spraying, affecting the normal growth of crops, and may cause differences in the growth rate of crops in different regions, making it inconvenient to harvest at the same time.

[0005] The present invention proposes a biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing the application of nitrogen fertilizer, comprising a crawler chassis for movement, a medicine box assembly is installed on the top of the crawler chassis, the medicine box assembly comprises a box body for loading biogas slurry, a rubber sheet is fixedly installed near the bottom of the inner side of the box body, and a plurality of protrusions are installed under the rubber sheet for moving the rubber sheet and thus shaking the biogas slurry; A liquid outlet pipe connected to the liquid inlet pipe of the water pump is installed inside the box body, and a spiral plate is movably installed inside the liquid outlet pipe. A plurality of water permeable holes are opened through the middle of the spiral plate, and the spiral plate swings up and down inside the liquid outlet pipe; The outer side of the liquid outlet pipe is connected to and fixedly installed with a liquid suction pipe, and the connection point between the liquid suction pipe and the liquid outlet pipe is located at the middle height of the spiral plate.

[0006] In addition, a rotating shaft is fixedly connected to the middle of the plurality of protrusions. One end of the rotating shaft is rotatably installed inside the box body, and the other end rotates through the box body and is fixedly connected to a pulley. The pulley is connected to the rotating shaft of the crawler chassis through a belt.

[0007] In addition, a partition is installed between the rubber sheet and the protrusion, the partition is fixedly installed on the inner side of the box body, and a clearance hole matching with the protrusion is opened through the middle of the partition.

[0008] In addition, a transverse bevel gear is fixedly installed on the outer side of the rotating shaft, a longitudinal bevel gear is meshingly installed on the outer side of the transverse bevel gear, a linkage rod is fixedly installed on the top of the longitudinal bevel gear, the linkage rod is slidably engaged with the spiral plate, and the top of the linkage rod is rotatably installed on the inner side of the liquid outlet pipe.

[0009] In addition, a mounting groove is provided on the outside of the linkage rod, a limit rod is fixedly installed on the inside of the mounting groove, the limit rod is slidably connected to the spiral plate, a rocking spring is fixedly installed between the spiral plate and the mounting groove, and the rocking spring is movably sleeved on the outer periphery of the limit rod.

[0010] In addition, a sediment collecting bin is fixedly installed inside the box body, the top of the sediment collecting bin is connected and fixedly connected to the liquid outlet pipe, a slag discharge cover plate is fixedly installed at one end of the sediment collecting bin, and this end of the sediment collecting bin passes through the box body.

[0011] In addition, a box cover is installed on the top of the box body by bolts to facilitate cleaning of the inside of the box body.

[0012] In addition, a filling pipe for filling biogas slurry is fixedly installed on the top of the box body.

[0013] In addition, a diesel generator for providing power and a frequency converter for assisting the operation of the diesel generator are fixedly installed on the top of the crawler chassis.

[0014] In addition, a centrifugal fan is fixedly installed on the top of the crawler chassis, an air duct is fixedly installed on the air outlet of the centrifugal fan, a nozzle is fixedly installed on the end of the air duct, and the nozzle is connected to the liquid outlet end of the water pump.

[0015] The present invention also provides an application method of a biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing the application of nitrogen fertilizer, and the use method thereof is as follows: S1: The movement of the crawler chassis causes the rubber sheet to shake in a wave-like manner, thereby causing the biogas slurry to shake.

[0016] S2: When spraying biogas slurry, the diesel generator and the frequency converter work together to generate electricity. The water pump draws the biogas slurry out of the outlet pipe, filters it through the spiral plate, and sprays it out from the nozzle. The centrifugal fan works to blow air, and high-speed wind blows out from the air duct to disperse and spray the biogas slurry sprayed from the nozzle.

[0017] S3: The crawler chassis moves at a set speed, causing the spiral plate to rotate and transport the impurities filtered inside it downward to the sediment collection bin for storage.

[0018] S4: After the biogas slurry is sprayed, the staff removes the slag discharge cover to discharge the residue inside the sediment collection bin.

[0019] The beneficial effects of the present invention are as follows: The biogas slurry safe application device for improving the productivity of sandy black soil and reducing the application of nitrogen fertilizer of the present invention has a rubber sheet added to the bottom of the inner side of the box for storing biogas slurry, and the protrusions push the rubber sheet upward in sequence, so that the rubber sheet shakes in a wave-like manner, thereby causing the biogas slurry to shake. The surface of the sandy black soil is uneven and has a high hardness. The shaking of the crawler chassis itself cooperates with the wave-like shaking of the rubber sheet, so that the biogas slurry inside the box is not easy to settle, and can be sprayed at any time, saving time and spraying evenly. When spraying the biogas slurry, the biogas slurry is filtered through the spiral plate. When the biogas slurry subsequently enters the liquid outlet pipe from the liquid suction pipe, it can flush the water holes, making the water holes less likely to be blocked. The spiral plate is movably installed, and the shaking of the crawler chassis drives the spiral plate to shake up and down, so that more water holes can cooperate with the biogas slurry entering from the liquid suction pipe, so that more water holes can be cleaned, and the shaking itself can also assist in unblocking the water holes, thereby making the water holes less likely to be blocked, and the slag removal operation is continuously carried out, so that the biogas slurry is sprayed smoothly. In addition, due to the filtering effect of the spiral plate, there is no need to filter the biogas slurry multiple times when loading it, thus saving the overall spraying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of the overall structure of a biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application provided by the present invention; Figure 2 A schematic diagram of the external structure of a medicine box assembly of a biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application provided by the present invention; Figure 3 A schematic diagram of the internal structure of a medicine box assembly of a biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application provided by the present invention; Figure 4 for Figure 3 A magnified image of point A; Figure 5 A schematic diagram of the connection of a sediment collection bin of a biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application provided by the present invention; Figure 6 A schematic diagram of the internal structure of a liquid outlet pipe of a biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application provided by the present invention; Figure 7 for Figure 6Enlarged view of point B.

[0022] In the figure: 100. Track chassis; 200. Diesel generator; 300, frequency converter; 400, medicine box assembly; 401, box body; 402, box cover; 403, liquid outlet pipe; 404, filling pipe; 405, pulley; 406, rotating shaft; 407, bump; 408, partition; 409, clearance hole; 410, rubber sheet; 411, horizontal bevel gear; 412, longitudinal bevel gear; 413, sediment collection bin; 414, linkage rod; 415, liquid suction pipe; 416, spiral plate; 417, water permeable hole; 418, mounting groove; 419, limit rod; 420, shaking spring; 421, slag discharge cover plate; 500, water pump; 600, centrifugal fan; 700. Air duct. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical means and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] As shown in Figure 1- Figure 7 As shown, the embodiment of the present invention provides a biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing the nitrogen fertilizer application, comprising a crawler chassis 100 for movement, a medicine box assembly 400 is installed on the top of the crawler chassis 100, and the medicine box assembly 400 comprises a box body 401 for loading biogas slurry, a rubber sheet 410 is fixedly installed near the bottom of the inner side of the box body 401, and a plurality of protrusions 407 for moving the rubber sheet 410 and shaking the biogas slurry are installed below the rubber sheet 410; In this embodiment, the biogas slurry contains a relatively large amount of organic acids and oxides. Rubber is an elastomeric material with good corrosion resistance and chemical resistance, and can withstand the erosion of chemical substances such as acids and alkalis in the biogas slurry.

[0026] The bumps 407 push the rubber sheet 410 upward in turn, causing the rubber sheet 410 to shake in a wave-like manner, thereby causing the biogas slurry to shake. The surface of the sand ginger black soil is uneven and hard. The shaking of the track chassis 100 itself cooperates with the wave-like shaking of the rubber sheet 410, making it difficult for the biogas slurry inside the box 401 to settle, and it can be sprayed at any time, saving time and spraying evenly.

[0027] Furthermore, a liquid outlet pipe 403 connected to the liquid inlet pipe of the water pump 500 is installed inside the box body 401, and a spiral plate 416 is movably installed inside the liquid outlet pipe 403. A plurality of water permeable holes 417 are opened through the middle of the spiral plate 416, through which liquid can pass, while impurities are intercepted, and the spiral plate 416 swings up and down inside the liquid outlet pipe 403; A liquid suction pipe 415 is fixedly installed on the outer side of the liquid outlet pipe 403 , and the connection between the liquid suction pipe 415 and the liquid outlet pipe 403 is located at the middle height of the spiral plate 416 .

[0028] In the present embodiment, when the biogas slurry enters the liquid outlet pipe 403 from the liquid suction pipe 415, it can flush the water permeable holes 417, making the water permeable holes 417 less likely to be blocked. The shaking of the tracked chassis 100 drives the spiral plate 416 to shake up and down, so that more water permeable holes 417 can cooperate with the biogas slurry entering from the liquid suction pipe 415, and more water permeable holes 417 can be cleaned. The shaking itself can also assist in unblocking the water permeable holes 417, thereby making the water permeable holes 417 less likely to be blocked, and the slag removal operation is continuously performed, so that the biogas slurry is sprayed smoothly. In addition, due to the filtering effect of the spiral plate 416, when loading the biogas slurry, there is no need to filter the biogas slurry multiple times, thereby saving the overall spraying efficiency.

[0029] Furthermore, a rotating shaft 406 is fixedly connected to the middle of the plurality of protrusions 407. One end of the rotating shaft 406 is rotatably installed on the inner side of the box body 401, and the other end rotates through the box body 401 and is fixedly connected to a pulley 405. The pulley 405 is connected to the rotating shaft of the crawler chassis 100 through a belt.

[0030] In this embodiment, the crawler chassis 100 moves, and the rotating shaft 406 and the protrusion 407 are driven to rotate through the belt and the pulley 405. The protrusion 407 pushes the rubber sheet 410 upward in turn, causing the rubber sheet 410 to shake in a wave shape.

[0031] Furthermore, a partition 408 is installed between the rubber sheet 410 and the protrusion 407 for supporting the rubber sheet 410. The two are installed in a close fit. The partition 408 is fixedly installed on the inner side of the box body 401. A clearance hole 409 that cooperates with the protrusion 407 is opened in the middle of the partition 408 to leave a rotation space for the protrusion 407.

[0032] Furthermore, a transverse bevel gear 411 is fixedly installed on the outer side of the rotating shaft 406, and a longitudinal bevel gear 412 is meshingly installed on the outer side of the transverse bevel gear 411. The two transmit and reverse, so that the rotating shaft 406 drives the linkage rod 414 to rotate, and a linkage rod 414 is fixedly installed on the top of the longitudinal bevel gear 412. The linkage rod 414 is slidably engaged with the spiral plate 416, and the top of the linkage rod 414 is rotatably installed on the inner side of the liquid outlet pipe 403, and a sediment collection bin 413 is fixedly installed on the inner side of the box body 401.

[0033] In this embodiment, the crawler chassis 100 moves at a set speed, and drives the connecting rod 414 and the spiral plate 416 to rotate by driving the rotating shaft 406, the transverse bevel gear 411, and the longitudinal bevel gear 412. The spiral plate 416 rotates to transport the impurities filtered inside it downward to the sediment collection bin 413 for storage.

[0034] Furthermore, a mounting groove 418 is provided on the outer side of the linkage rod 414, and a limiting rod 419 is fixedly installed on the inner side of the mounting groove 418 for limiting the movement trajectory of the spiral plate 416. The limiting rod 419 is slidably connected to the spiral plate 416, and a rocking spring 420 is fixedly installed between the spiral plate 416 and the mounting groove 418 to assist the spiral plate 416 to rock up and down. The rocking spring 420 is movably sleeved on the outer side of the limiting rod 419.

[0035] Furthermore, the top of the sediment collecting bin 413 is connected and fixedly connected to the liquid outlet pipe 403 , a slag discharge cover plate 421 is fixedly installed at one end of the sediment collecting bin 413 , and this end of the sediment collecting bin 413 passes through the box body 401 .

[0036] In this embodiment, after the biogas slurry is sprayed, the staff removes the residue discharge cover plate 421 to discharge the residue inside the sediment collection bin 413 .

[0037] Furthermore, a box cover 402 is installed on the top of the box body 401 by bolts to facilitate cleaning of the interior of the box body 401.

[0038] Furthermore, a filling pipe 404 for filling biogas slurry is fixedly installed on the top of the box body 401 .

[0039] Furthermore, a diesel generator 200 for providing power and a frequency converter 300 for assisting the diesel generator 200 are fixedly mounted on the top of the crawler chassis 100 .

[0040] Furthermore, a centrifugal fan 600 is fixedly installed on the top of the crawler chassis 100, an air duct 700 is fixedly installed at the air outlet of the centrifugal fan 600, a nozzle is fixedly installed at the end of the air duct 700, and the nozzle is connected to the liquid outlet of the water pump 500.

[0041] In this embodiment, when spraying the biogas slurry, the diesel generator 200 and the frequency converter 300 cooperate to generate electricity, the water pump 500 draws the biogas slurry from the liquid outlet pipe 403, filters it through the spiral plate 416, and sprays it from the nozzle. The centrifugal fan 600 works to blow air, and high-speed wind is blown out from the air duct 700 to disperse the biogas slurry sprayed from the nozzle, and secondary energization is performed for uniform spraying, so that long-distance spraying can be achieved.

[0042] The above-mentioned biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing the nitrogen fertilizer application is used as follows: S1: The crawler chassis 100 moves to drive the rubber sheet 410 to shake in a wave-like manner, thereby causing the biogas slurry to shake.

[0043] S2: When spraying biogas slurry, the diesel generator 200 and the frequency converter 300 cooperate to generate electricity, the water pump 500 draws the biogas slurry from the liquid outlet pipe 403, filters it through the spiral plate 416, and sprays it from the nozzle, the centrifugal fan 600 works to blow air, and high-speed wind blows out from the air duct 700 to scatter and spray the biogas slurry sprayed from the nozzle.

[0044] S3: The crawler chassis 100 moves at a set speed, so that the spiral plate 416 rotates to transport the impurities filtered inside it downward to the sediment collection bin 413 for storage.

[0045] S4: After the biogas slurry is sprayed, the staff removes the slag discharge cover 421 to discharge the residue inside the sediment collection bin 413.

[0046] How it works: The crawler chassis 100 moves, and the rotating shaft 406 and the protrusion 407 are driven to rotate through the belt and the pulley 405. The protrusion 407 pushes the rubber sheet 410 upward in turn, causing the rubber sheet 410 to shake in a wave-like manner, thereby causing the biogas slurry to shake. The surface of the sand ginger black soil is uneven and has great hardness. The shaking of the crawler chassis 100 itself cooperates with the wave-like shaking of the rubber sheet 410, so that the biogas slurry inside the box 401 is not easy to settle and can be sprayed at any time, saving time and spraying evenly.

[0047] When spraying biogas slurry, the diesel generator 200 and the frequency converter 300 work together to generate electric energy, the water pump 500 draws the biogas slurry from the liquid outlet pipe 403, filters it through the spiral plate 416, and sprays it from the nozzle. The centrifugal fan 600 works to blow air, and high-speed wind blows out from the air duct 700 to disperse the biogas slurry sprayed from the nozzle, and secondary energization is performed for uniform spraying, which can achieve long-distance spraying. The crawler chassis 100 moves at a set speed, and drives the shaft 406, the transverse bevel gear 411, and the longitudinal bevel gear 412 to drive the linkage rod 414 and the spiral plate 416 to rotate. The spiral plate 416 rotates and transports the impurities filtered inside it downward to the sediment collection bin 413 for storage; When the biogas slurry enters the liquid outlet pipe 403 from the liquid suction pipe 415, it can flush the water permeable holes 417, making the water permeable holes 417 less likely to be blocked. The shaking of the crawler chassis 100 drives the spiral plate 416 to shake up and down, so that more water permeable holes 417 can cooperate with the biogas slurry entering from the liquid suction pipe 415, and more water permeable holes 417 are cleaned. The shaking itself can also help to clear the water permeable holes 417, thereby making the water permeable holes 417 less likely to be blocked, and the slag removal operation is continuously performed, so that the biogas slurry is sprayed smoothly. In addition, due to the filtering effect of the spiral plate 416, when loading the biogas slurry, there is no need to filter the biogas slurry multiple times, thereby saving the overall spraying efficiency.

[0048] After the biogas slurry is sprayed, the staff removes the slag discharge cover plate 421 to discharge the residue inside the sediment collection bin 413 .

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing the application of nitrogen fertilizer, comprising a crawler chassis (100) for movement, a medicine box assembly (400) being installed on the top of the crawler chassis (100), the medicine box assembly (400) comprising a box body (401) for loading biogas slurry, characterized in that: A rubber sheet (410) is fixedly mounted on the inner side of the box body (401) near the bottom, and a plurality of protrusions (407) are mounted below the rubber sheet (410) for moving the rubber sheet (410) and thereby shaking the biogas slurry; A liquid outlet pipe (403) connected to a liquid inlet pipe of a water pump (500) is installed inside the box body (401), a spiral plate (416) is movably installed inside the liquid outlet pipe (403), a plurality of water permeable holes (417) are formed through the middle of the spiral plate (416), and the spiral plate (416) swings up and down inside the liquid outlet pipe (403); The outer side of the liquid outlet pipe (403) is connected to a liquid suction pipe (415) which is fixedly installed thereon, and the connection between the liquid suction pipe (415) and the liquid outlet pipe (403) is located at the middle height of the spiral plate (416).

2. The biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 1, characterized in that: A rotating shaft (406) is fixedly connected to the middle of the plurality of protrusions (407), one end of the rotating shaft (406) is rotatably mounted inside the box (401), and the other end rotatably penetrates the box (401) and is fixedly connected to a pulley (405), which is connected to the rotating shaft of the crawler chassis (100) via a belt.

3. The biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 1, characterized in that: A partition (408) is installed between the rubber sheet (410) and the protrusion (407). The partition (408) is fixedly installed on the inner side of the box body (401). A clearance hole (409) matching with the protrusion (407) is opened through the middle of the partition (408).

4. The biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 2, characterized in that: A transverse bevel gear (411) is fixedly mounted on the outer side of the rotating shaft (406), a longitudinal bevel gear (412) is meshingly mounted on the outer side of the transverse bevel gear (411), a linkage rod (414) is fixedly mounted on the top of the longitudinal bevel gear (412), the linkage rod (414) is slidably engaged with the spiral plate (416), and the top of the linkage rod (414) is rotatably mounted on the inner side of the liquid outlet pipe (403).

5. The biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 4, characterized in that: The linkage rod (414) is provided with a mounting groove (418) on the outside, a limit rod (419) is fixedly mounted on the inside of the mounting groove (418), the limit rod (419) is slidably connected to the spiral plate (416), a rocking spring (420) is fixedly mounted between the spiral plate (416) and the mounting groove (418), and the rocking spring (420) is movably sleeved on the periphery of the limit rod (419).

6. The biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 5, characterized in that: A sediment collection bin (413) is fixedly mounted inside the box body (401); the top of the sediment collection bin (413) is connected and fixedly connected to the liquid outlet pipe (403); a slag discharge cover plate (421) is fixedly mounted at one end of the sediment collection bin (413); and the sediment collection bin (413) passes through the box body (401).

7. The biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 6, characterized in that: A box cover (402) is installed on the top of the box body (401) by means of bolts to facilitate cleaning of the interior of the box body (401).

8. The biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 7, characterized in that: The top of the box body (401) is connected to and fixedly mounted with a filling pipe (404) for filling biogas slurry.

9. The biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 8, characterized in that: A diesel generator (200) for providing power and a frequency converter (300) for assisting the diesel generator (200) in working are fixedly mounted on the top of the crawler chassis (100).

10. The biogas slurry safe application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 9, characterized in that: A centrifugal fan (600) is fixedly mounted on the top of the crawler chassis (100), an air duct (700) is fixedly mounted on the air outlet of the centrifugal fan (600), a nozzle is fixedly mounted on the end of the air duct (700), and the nozzle is connected to the liquid outlet of the water pump (500).

11. The method for applying the biogas slurry safety application device for improving the productivity of sand ginger black soil and reducing nitrogen fertilizer application according to claim 10, characterized in that: The method comprises the following steps: S1: The crawler chassis (100) moves, causing the rubber sheet (410) to shake in a wave-like manner, thereby causing the biogas slurry to shake; S2: When spraying biogas slurry, the diesel generator (200) and the frequency converter (300) work together to generate electric energy, the water pump (500) draws the biogas slurry from the liquid outlet pipe (403), filters it through the spiral plate (416), and sprays it from the nozzle, the centrifugal fan (600) works to blow air, and high-speed wind is blown out from the air duct (700) to disperse and spray the biogas slurry sprayed from the nozzle; S3: The crawler chassis (100) moves at a set speed, so that the spiral plate (416) rotates to transport the impurities filtered inside the spiral plate downward to the sediment collection bin (413) for storage; S4: After the biogas slurry is sprayed, the staff removes the slag discharge cover plate (421) to discharge the residue inside the sediment collection bin (413).

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