High-efficiency deammoniation device and treatment method for kitchen waste biogas slurry

Abstract

The present invention relates to the technical field of food waste biogas treatment, and specifically to an efficient deammoniation device and treatment method for food waste biogas. It comprises a box body, a push plate is slidably arranged in the front and rear directions of the box body, a plurality of inclined holes are provided on the push plate, a driving assembly for driving the push plate to move is provided on the box body, an inclined plate is fixed in the box body below the push plate, a rubber membrane is provided above the inclined plate, a plurality of connection frames are fixedly and sealedly connected at the lower end of the rubber membrane, a plurality of sliding sleeves are fixed at the lower end of the inclined plate inside the connection frame, a through hole is provided on the inclined plate above the sliding sleeve, a middle nozzle is provided on the rubber membrane above the through hole, and a side nozzle is provided on the rubber membrane on the right side of the middle nozzle. The compressed air sprayed from the side nozzle of the device can blow away the active mud precipitated on the rubber membrane, ensure the fluidity of the active mud, prevent the active mud from being retained and accumulated on the rubber membrane, and prevent the active mud from being too old and affecting the deammoniation efficiency of the food waste biogas.

Description

Technical Field

[0001] The invention relates to the technical field of restaurant kitchen waste biogas slurry treatment, and in particular to a high-efficiency deammoniation device and a treatment method for restaurant kitchen waste biogas slurry. Background Art

[0002] Biogas fermentation technology will produce a large amount of biogas liquid when treating high-concentration organic waste. In the process of treating food waste and kitchen waste, the biogas liquid formed by the waste needs to be deaminated. If a large amount of ammonia in the biogas liquid is not effectively removed or recovered, the sewage treatment emission reduction target will be greatly reduced.

[0003] The patent document with authorization announcement number CN103613107B discloses a method for deammoniation and recovery of ammonia in biogas slurry. A vacuum pump draws the deammoniation device into a vacuum state, and the deammoniation device is filled with solid fillers. Air is introduced to blow the ammonia gas in the deammoniation device into a sulfuric acid solution to obtain an ammonium sulfate solution. The pH value of the biogas slurry is adjusted to greater than 9 by adding calcium hydroxide solution. NH3 is absorbed by a large amount of sulfuric acid reagent, resulting in excessively high production costs. The sulfuric acid solution will also cause harm to the environment.

[0004] The patent document with the authorization announcement number CN105236668B discloses a method for pretreating biogas slurry with magnesium hydrogen phosphate assisted biological deammoniation, wherein a corresponding amount of magnesium hydrogen phosphate powder is added, the pH is adjusted to 9.5 with sodium hydroxide, and the reaction is carried out for 12-36 hours. The appropriate amount of magnesium hydrogen phosphate absorbs the free ammonia in the biogas slurry and reduces the free ammonia content of the biogas slurry. This patent requires the consumption of a large amount of chemical reagents, has a high production cost, and has a long reaction time, which is not conducive to industrial continuous production. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an efficient deammoniation device and a treatment method for food waste biogas slurry which can reduce treatment costs and avoid using a large amount of solutions that are likely to pollute the environment during the treatment process.

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] The high-efficiency deammonification device for food waste biogas comprises a box body, a push plate is slidably arranged in the front-to-back direction in the box body, a plurality of inclined holes are opened on the push plate, a driving assembly for driving the push plate to move is arranged on the box body, an inclined plate is fixed in the box body below the push plate, the right end of the inclined plate is inclined downward, a sedimentation tank is formed between the right end of the inclined plate and the right side wall of the box body, a second sewage pump connected with the sedimentation tank is fixed on the outside of the box body, a rubber membrane is arranged above the inclined plate, a plurality of connection frames are fixedly and sealedly connected to the lower end of the rubber membrane, the connection frame is fixedly and sealedly connected to the upper end of the inclined plate, an air storage chamber is formed between the connection frame, the rubber membrane and the inclined plate, a plurality of sliding sleeves are fixed to the lower end of the inclined plate inside the connection frame, and the plurality of sliding sleeves are arranged in the front-to-back direction of the box body. The upper linear array, the inclined plate above the sliding sleeve is provided with through holes, the rubber membrane above the through holes is provided with middle nozzles, the rubber membrane on the right side of the middle nozzle is provided with side nozzles, the through holes are connected to the air storage chamber above them, the sliding seal in the through holes is connected with a push block, the fixed seal in the sliding sleeve is connected with a fixed ring, the elastic sliding seal in the fixed ring is plugged with a sliding rod, the upper end of the sliding rod is fixedly connected to the push block, the lower end of the sliding rod is fixed with a piston plate, the piston plate is slidingly sealed and connected in the sliding sleeve, a lower air hole is provided on the sliding sleeve between the fixed ring and the piston plate, an upper air hole connected to the through hole is provided on the inclined plate, the upper air hole and the lower air hole are connected to the second air pipe, an electromagnetic valve is installed in the second air pipe, and the second air pipe is connected to the air source.

[0008] Specifically, a plurality of suction holes are opened around the upper end of the box body, the suction holes are connected to the scum suction assembly, the scum suction assembly includes a suction pipe fixed to the upper end of the box body, the suction pipe is connected to the suction holes, the suction pipe is connected to a connecting pipe, the connecting pipe is connected to a sludge suction pipe of a first sewage pump, and the first sewage pump is fixedly connected to the box body.

[0009] Specifically, the driving assembly includes a lead screw rotatably arranged in a box body, the axial direction of the lead screw is parallel to the front-rear direction of the box body, a motor is fixed outside the box body, and the output shaft of the motor is concentrically fixedly connected to the lead screw.

[0010] Specifically, a spring is sleeved on the slide bar between the fixed ring and the push block, the upper end of the spring is fixedly connected to the push block, and the lower end of the spring is fixedly connected to the fixed ring.

[0011] Specifically, a retaining ring is fixed inside the lower end of the sliding sleeve.

[0012] Specifically, a side nozzle is arranged on the rubber membrane on the left side of the middle nozzle.

[0013] Specifically, the air source includes an air pump, an air outlet end of the air pump is fixedly connected to a first air pipe, and the second air pipe is connected to the first air pipe.

[0014] The high-efficiency deammonification device for restaurant waste biogas slurry treats the restaurant waste biogas slurry by inputting the restaurant waste biogas slurry into a box and placing activated mud containing anaerobic ammonia-oxidizing bacteria and nitrite-oxidizing bacteria into the box.

[0015] The push plate is driven to reciprocate in the box by the driving assembly, so that the food waste biogas slurry is fully mixed with the activated mud, and the ammonia in the food waste biogas slurry is fully reacted and separated.

[0016] At the same time, start the air source, and open the solenoid valves in each column from left to right in turn. After the solenoid valve is opened, the compressed air enters the upper and lower air holes through the second air pipe, because the upper air hole is blocked by the push block. Therefore, at the beginning, the compressed air can only enter the sliding sleeve between the piston plate and the fixed ring through the lower air hole. As the pressure in the sliding sleeve between the piston plate and the fixed ring continues to increase, the piston plate, the slide rod and the push block move downward. When the push block moves to the bottom of the upper air hole, the upper air hole, the through hole and the air storage chamber connected to the through hole are connected, and then the compressed air can enter the air storage chamber. After the compressed air enters the air storage chamber, the rubber membrane above the air storage chamber is deformed and bulges upward. At the same time, compressed air is sprayed out through the middle nozzle and the side nozzle on the right side of the middle nozzle to aerate the food waste biogas slurry in the box. After the rubber membrane above the air storage chamber is deformed and bulged upward, the spray direction of the compressed air sprayed from the middle nozzle is perpendicular to the inclined plate, and the spray direction of the compressed air sprayed from the side nozzle on the right side of the middle nozzle is parallel to the inclined plate. The compressed air sprayed from the side nozzle on the right side of the middle nozzle can disperse the active mud deposited on the rubber membrane, ensure the fluidity of the active mud, prevent the active mud from being retained and accumulated on the rubber membrane, and prevent the active mud from being too old and affecting the deammonification efficiency of the food waste biogas slurry; since the solenoid valves in each column from left to right are opened in turn, the rubber membrane parts corresponding to the connecting frames from left to right will bulge upward in turn, and the compressed air sprayed from the side nozzle on the right side of the middle nozzle can also blow the active mud deposited on the rubber membrane to the sedimentation tank, which can effectively blow the active mud deposited on the rubber membrane to the sedimentation tank and then discharge it to the outside of the box.

[0017] After the solenoid valve is closed, the push block, the slide rod and the piston plate move upward, and the compressed air between the fixed ring and the piston plate can enter the through hole through the lower air hole, the second air pipe and the upper air hole. The compressed air entering the through hole can blow away the active mud or other impurities in the through hole, ensuring that the push block can smoothly enter the through hole.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The device is provided with a scum suction component, which can remove the scum on the surface of the kitchen waste biogas in the box, prevent the scum from forming a floating film on the surface, affect the gas escape, and is beneficial to the deammoniation process.

[0020] 2. The push plate reciprocates in the box, and the push plate can fully mix the active mud with the food waste biogas liquid, which can improve the deammoniation efficiency of the food waste biogas liquid.

[0021] 3. After the rubber membrane above the air storage chamber is deformed and bulges upward, the injection direction of the compressed air sprayed from the middle nozzle is perpendicular to the inclined plate, and the injection direction of the compressed air sprayed from the side nozzle on the right side of the middle nozzle is parallel to the inclined plate. The compressed air sprayed from the side nozzle on the right side of the middle nozzle can disperse the activated sludge precipitated on the rubber membrane, ensure the fluidity of the activated sludge, prevent the activated sludge from being retained and accumulated on the rubber membrane, and prevent the activated sludge from being too old and affecting the deammoniation efficiency of food waste biogas slurry.

[0022] 4. Since the solenoid valves in each column from left to right are opened in sequence, the rubber membrane parts corresponding to the connecting frames from left to right will bulge upward in sequence, and the compressed air sprayed from the side nozzle on the right side of the middle nozzle can also blow the active mud deposited on the rubber membrane to the sedimentation tank, which can effectively blow the active mud deposited on the rubber membrane to the sedimentation tank and then discharge it to the outside of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the device.

[0024] Figure 2 A cross-sectional view of the box.

[0025] Figure 3 Schematic diagram of the inclined plate.

[0026] Figure 4 Schematic diagram of the push block in the through hole.

[0027] Figure 5 A cross-sectional view of the sleeve.

[0028] Figure 6 for Figure 5 Magnified view of area A.

[0029] Figure 7 Schematic diagram of the coordination between the inclined plate and the rubber membrane.

[0030] Figure 8 This is a schematic diagram of the rubber membrane portion above the connection frame bulging upward.

[0031] The names of the parts in the accompanying drawings are: 1. Box body; 2. Screw; 3. Motor; 4. Push plate; 5. Inclined hole; 6. Inclined plate; 7. Sliding sleeve; 8. Push block; 9. Sliding rod; 10. Fixed ring; 11. Spring; 12. Piston plate; 13. Retaining ring; 14. Air pump; 15. First air pipe; 16. Second air pipe; 17. Solenoid valve; 18. Lower air hole; 19. Upper air hole; 20. Rubber membrane; 21. Connecting frame; 22. Middle nozzle; 221. Side nozzle; 23. Sedimentation tank; 24. Silt extraction pipe; 25. First sewage pump; 26. Second sewage pump; 27. Suction pipe; 28. Suction hole; 29. ​​Connecting pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Embodiment 1: Figure 1-Figure 8 As shown, the efficient deammonification device for food waste biogas slurry comprises a box body 1, and a plurality of suction holes 28 are opened around the upper end of the box body 1, and the suction holes 28 are connected to the scum suction assembly.

[0034] The scum suction assembly includes a suction pipe 27 fixed to the upper end of the housing 1 , the suction pipe 27 is connected to the suction hole 28 , the suction pipe 27 is connected to the connecting pipe 29 , the connecting pipe 29 is connected to the sludge suction pipe 24 of the first sewage pump 25 , and the first sewage pump 25 is fixedly connected to the housing 1 .

[0035] A push plate 4 is slidably arranged in the front-rear direction in the box body 1 , and a plurality of inclined holes 5 are opened on the push plate 4 . A driving component for driving the push plate 4 to move is arranged on the box body 1 .

[0036] The driving assembly includes a screw 2 rotatably disposed in a housing 1 , the axial direction of the screw 2 is parallel to the front-rear direction of the housing 1 , a motor 3 is fixed to the outside of the housing 1 , and the output shaft of the motor 3 is concentrically fixedly connected to the screw 2 .

[0037] An inclined plate 6 is fixed in the box body 1 below the push plate 4, and the right end of the inclined plate 6 is tilted downward, and a sedimentation tank 23 is formed between the right end of the inclined plate 6 and the right side wall of the box body 1. A second sewage pump 26 connected to the sedimentation tank 23 is fixed outside the box body 1.

[0038] A rubber membrane 20 is arranged above the inclined plate 6, and a plurality of connection frames 21 are fixedly and sealedly connected at the lower end of the rubber membrane 20. The connection frame 21 is fixedly and sealedly connected to the upper end of the inclined plate 6, and an air storage chamber is formed between the connection frame 21, the rubber membrane 20 and the inclined plate 6. A plurality of sliding sleeves 7 are fixed at the lower end of the inclined plate 6 inside the connection frame 21, and a retaining ring 13 is fixed at the lower end of the sliding sleeve 7. The plurality of sliding sleeves 7 are arranged in a linear array in the front-back direction of the box body 1. Through holes are provided on the inclined plate 6 above the sliding sleeve 7, and a middle nozzle 22 is provided on the rubber membrane 20 above the through hole, and a side nozzle 221 is provided on the rubber membrane 20 on the right side of the middle nozzle 22.

[0039] The through hole is connected to the air storage chamber above it. A push block 8 is connected in a sliding seal in the through hole, a fixed ring 10 is connected in a fixed seal in the sliding sleeve 7, a slide rod 9 is inserted in an elastic sliding seal in the fixed ring 10, the upper end of the slide rod 9 is fixedly connected to the push block 8, a piston plate 12 is fixed at the lower end of the slide rod 9, and the piston plate 12 is connected in a sliding seal in the sliding sleeve 7. Specifically, a spring 11 is sleeved on the slide rod 9 between the fixed ring 10 and the push block 8, the upper end of the spring 11 is fixedly connected to the push block 8, and the lower end of the spring 11 is fixedly connected to the fixed ring 10. A lower air hole 18 is provided on the sliding sleeve 7 between the fixed ring 10 and the piston plate 12, an upper air hole 19 connected to the through hole is provided on the inclined plate 6, the upper air hole 19 and the lower air hole 18 are connected to the second air pipe 16, an electromagnetic valve 17 is installed in the second air pipe 16, and the second air pipe 16 is connected to the air source.

[0040] The air source comprises an air pump 14 , an air outlet end of the air pump 14 is fixedly connected to a first air pipe 15 , and a second air pipe 16 is connected to the first air pipe 15 .

[0041] During operation, the food waste biogas is input into the box 1 and active mud containing anaerobic ammonia oxidizing bacteria and nitrite bacteria is put into the box 1.

[0042] The motor 3 is started and drives the screw 2 to rotate. During the rotation of the screw 2, the push plate 4 reciprocates in the box body 1 along the front and rear direction of the box body 1, so that the food waste biogas slurry is fully mixed with the activated mud, so that the ammonia in the food waste biogas slurry is fully reacted and separated.

[0043] At the same time, the air source is started, and the solenoid valves 17 of each column from left to right are opened in sequence. After the solenoid valve 17 is opened, the compressed air enters the upper air hole 19 and the lower air hole 18 through the second air pipe 16, because the upper air hole 19 is blocked by the push block 8. Therefore, at the beginning, the compressed air can only enter the sliding sleeve 7 between the piston plate 12 and the fixed ring 10 through the lower air hole 18. As the pressure in the sliding sleeve 7 between the piston plate 12 and the fixed ring 10 continues to increase, the piston plate 12, the slide rod 9 and the push block 8 move downward. When the push block 8 moves to the bottom of the upper air hole 19, the upper air hole 19, the through hole and the air storage chamber connected to the through hole are connected, and then the compressed air can enter the air storage chamber. After the compressed air enters the air storage chamber, the rubber membrane 20 above the air storage chamber is deformed and bulges upward. At the same time, the compressed air is sprayed through the middle nozzle 22 and the side nozzle 221 on the right side of the middle nozzle 22 to aerate the food waste biogas in the box 1.

[0044] After the rubber membrane 20 above the air storage chamber is deformed and bulges upward, the injection direction of the compressed air ejected from the middle nozzle 22 is perpendicular to the inclined plate 6, and the injection direction of the compressed air ejected from the side nozzle 221 on the right side of the middle nozzle 22 is parallel to the inclined plate 6. The compressed air ejected from the side nozzle 221 on the right side of the middle nozzle 22 can disperse the active mud deposited on the rubber membrane 20, ensure the fluidity of the active mud, prevent the active mud from being retained and accumulated on the rubber membrane 20, and prevent the active mud from being too old and affecting the deammoniation efficiency of the food waste biogas slurry.

[0045] Since the solenoid valves 17 in each column from left to right are opened in sequence, the rubber membrane 20 parts corresponding to the connecting frame 21 from left to right will bulge upward in sequence, and the compressed air sprayed from the side nozzle 221 on the right side of the middle nozzle 22 can also blow the active mud deposited on the rubber membrane 20 to the sedimentation tank 23, which can effectively blow the active mud deposited on the rubber membrane 20 to the sedimentation tank 23 and then discharge it to the outside of the box body 1.

[0046] After the solenoid valve 17 is closed, under the elastic force of the spring 11, the push block 8, the slide rod 9 and the piston plate 12 move upward, and the compressed air between the fixed ring 10 and the piston plate 12 can enter the through hole through the lower air hole 18, the second air pipe 16 and the upper air hole 19. The compressed air entering the through hole can blow away the active mud or other impurities in the through hole, ensuring that the push block 8 can smoothly enter the through hole.

[0047] Embodiment 2: Based on Embodiment 1, refer to Figure 7 and Figure 8 As shown, a side nozzle 221 is provided on the rubber membrane 20 on the left side of the middle nozzle 22 .

[0048] By arranging the side nozzle 221 on the rubber membrane 20 on the left side of the middle nozzle 22, when the rubber membrane 20 portion corresponding to the connection frame 21 bulges upward, compressed air is ejected from the side nozzles 221 on the left and right sides of the middle nozzle 22. Therefore, the active mud deposited on the rubber membrane 20 can be fully blown away, the fluidity of the active mud can be further improved, the active mud can be prevented from being retained and accumulated on the rubber membrane 20, and the active mud can be prevented from being too long in age to affect the deammoniation efficiency of the food waste biogas slurry.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly efficient deammonification device for kitchen waste biogas, comprising a housing (1), a push plate (4) slidably arranged in the front-rear direction in the housing (1), a plurality of inclined holes (5) being provided on the push plate (4), characterized in that: The box body (1) is provided with a driving assembly for driving the push plate (4) to move. An inclined plate (6) is fixed inside the box body (1) below the push plate (4). The right end of the inclined plate (6) is inclined downward. A sedimentation tank (23) is formed between the right end of the inclined plate (6) and the right side wall of the box body (1). A second sewage pump (26) connected to the sedimentation tank (23) is fixed outside the box body (1). A rubber membrane (20) is provided above the inclined plate (6). The lower end of the rubber membrane (20) is fixedly and sealedly connected to a plurality of connecting members. A connecting frame (21) is fixedly and sealedly connected to the upper end of the inclined plate (6); an air storage chamber is formed between the connecting frame (21), the rubber membrane (20) and the inclined plate (6); a plurality of sliding sleeves (7) are fixed to the lower end of the inclined plate (6) inside the connecting frame (21); the plurality of sliding sleeves (7) are linearly arrayed in the front-rear direction of the box body (1); a through hole is opened on the inclined plate (6) above the sliding sleeve (7); and an intermediate nozzle is arranged on the rubber membrane (20) above the through hole. (22), a side nozzle (221) is arranged on the rubber membrane (20) on the right side of the middle nozzle (22), a through hole is communicated with the air storage chamber above the through hole, a push block (8) is slidably sealed in the through hole, a fixed ring (10) is fixedly sealed in the sliding sleeve (7), a slide rod (9) is elastically inserted in the fixed ring (10), the upper end of the slide rod (9) is fixedly connected to the push block (8), the lower end of the slide rod (9) is fixedly connected to the piston plate (12), and the piston plate (12) is slidably sealed in the sliding sleeve (7). The seal is connected in the sliding sleeve (7), a lower air hole (18) is provided on the sliding sleeve (7) between the fixed ring (10) and the piston plate (12), an upper air hole (19) connected to the through hole is provided on the inclined plate (6), the upper air hole (19) and the lower air hole (18) are connected to the second air pipe (16), an electromagnetic valve (17) is installed in the second air pipe (16), the second air pipe (16) is connected to the air source, and when the air source is started, the electromagnetic valves (17) in each column from left to right are opened in sequence.

2. The high-efficiency deammoniation device for kitchen waste biogas slurry according to claim 1 is characterized in that: A plurality of suction holes (28) are provided around the upper end of the casing (1), the suction holes (28) are connected to a scum suction assembly, the scum suction assembly comprises a suction pipe (27) fixed to the upper end of the casing (1), the suction pipe (27) is connected to the suction hole (28), the suction pipe (27) is connected to a connecting pipe (29), the connecting pipe (29) is connected to a sludge suction pipe (24) of a first sewage pump (25), and the first sewage pump (25) is fixedly connected to the casing (1).

3. The high-efficiency deammoniation device for food waste biogas slurry according to claim 1 is characterized in that: The driving assembly comprises a lead screw (2) rotatably arranged in a housing (1), the axial direction of the lead screw (2) being parallel to the front-rear direction of the housing (1), a motor (3) being fixed outside the housing (1), and an output shaft of the motor (3) being coaxially fixedly connected to the lead screw (2).

4. The high-efficiency deammoniation device for food waste biogas slurry according to claim 1 is characterized in that: A spring (11) is sleeved on the slide bar (9) between the fixed ring (10) and the push block (8); the upper end of the spring (11) is fixedly connected to the push block (8), and the lower end of the spring (11) is fixedly connected to the fixed ring (10).

5. The high-efficiency deammoniation device for food waste biogas slurry according to claim 1, characterized in that: A retaining ring (13) is fixed inside the lower end of the sliding sleeve (7).

6. The high-efficiency deammoniation device for food waste biogas slurry according to claim 1, characterized in that: A side nozzle (221) is provided on the rubber film (20) on the left side of the middle nozzle (22).

7. The high-efficiency deammoniation device for food waste biogas slurry according to claim 1, characterized in that: The gas source comprises an air pump (14), the gas outlet end of the air pump (14) is fixedly connected to a first air pipe (15), and the second air pipe (16) is connected to the first air pipe (15).

8. A method for treating food waste biogas slurry based on the high-efficiency deammoniation device for food waste biogas slurry according to claim 1, characterized in that: The food waste biogas is input into the box (1) and active mud containing anaerobic ammonia-oxidizing bacteria and nitrite-oxidizing bacteria is placed in the box (1); the push plate (4) is driven to reciprocate in the box (1) so that the food waste biogas and the active mud are fully mixed, and the ammonia in the food waste biogas is fully reacted and separated; at the same time, the gas source is started and the solenoid valves (17) in each column from left to right are opened in sequence; after the solenoid valves (17) are opened, the compressed air enters the upper air hole (19) and the lower air hole (18) through the second air pipe (16). Since the upper air hole (19) is blocked by the push block (8), the opening At the beginning, the compressed air can only enter the sliding sleeve (7) between the piston plate (12) and the fixed ring (10) through the lower air hole (18). As the pressure in the sliding sleeve (7) between the piston plate (12) and the fixed ring (10) increases, the piston plate (12), the slide rod (9) and the push block (8) move downward. When the push block (8) moves to below the upper air hole (19), the upper air hole (19), the through hole and the air storage chamber connected to the through hole are connected. Then, the compressed air can enter the air storage chamber. After the compressed air enters the air storage chamber, the rubber membrane (20) above the air storage chamber is deformed and bulges upward. At the same time, Compressed air is sprayed through the middle nozzle (22) and the side nozzle (221) on the right side of the middle nozzle (22) to aerate the food waste biogas slurry in the box (1). After the rubber membrane (20) above the air storage chamber is deformed and bulges upward, the spray direction of the compressed air sprayed from the middle nozzle (22) is perpendicular to the inclined plate (6), and the spray direction of the compressed air sprayed from the side nozzle (221) on the right side of the middle nozzle (22) is parallel to the inclined plate (6). The compressed air sprayed from the side nozzle (221) on the right side of the middle nozzle (22) can blow away the active mud deposited on the rubber membrane (20), thereby ensuring that the active mud is The fluidity of the rubber membrane (20) is improved to prevent the active sludge from being retained and accumulated, and to prevent the active sludge from being too old and affecting the deammoniation efficiency of the food waste biogas liquid; since the electromagnetic valves (17) of each column from left to right are opened in sequence, the rubber membrane (20) parts corresponding to the connection frame (21) from left to right will bulge upward in sequence, and the compressed air sprayed from the side nozzle (221) on the right side of the middle nozzle (22) can also blow the active sludge deposited on the rubber membrane (20) to the sedimentation tank (23), and can effectively blow the active sludge deposited on the rubber membrane (20) to the sedimentation tank (23) and then discharge it to the outside of the box body (1); After the solenoid valve (17) is closed, the push block (8), the slide rod (9) and the piston plate (12) move upward, and the compressed air between the fixed ring (10) and the piston plate (12) can enter the through hole through the lower air hole (18), the second air pipe (16) and the upper air hole (19). The compressed air entering the through hole can blow away the active mud or other impurities in the through hole, ensuring that the push block (8) can smoothly enter the through hole.

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