A device and method for treating biogas slurry from kitchen waste

Abstract

The present invention discloses a device for treating food waste biogas slurry, comprising a base, a coagulation sedimentation tank mounted on the top of the base, a socket disposed within the slot, a plug rod embedded within the socket, a clamping block mounted on the top of the plug rod, two sets of mutually adjacent surfaces of the clamping blocks each having a storage box (1) mounted thereon, one set of the storage boxes (1) having a front-to-back arrangement of limiting holes disposed on one side of the outer wall, and nozzles disposed evenly on the front, back, and bottom of the two sets of the storage boxes (1), and a connecting pipe mounted on the top of the two sets of the storage boxes (1). The present invention comprises a base, a coagulation sedimentation tank, the storage boxes (1), and the nozzles. When treating food waste biogas slurry, air blown by a blower is transported through the connecting pipe and blown into the interior of the storage boxes (1), allowing a solvent contained in the storage boxes (1) to be sprayed into the interior of the biogas slurry through the nozzles, thereby improving the treatment efficiency of the food waste biogas slurry to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of restaurant garbage biogas slurry raw liquid treatment, in particular to a restaurant garbage biogas slurry treatment device and a treatment method thereof. Background Art

[0002] During the anaerobic fermentation process of food waste, a large amount of biogas is produced. This biogas is a high-concentration organic or inorganic wastewater containing solid organic matter and metal ions. It usually needs to be treated before it can be discharged. However, existing food waste biogas treatment devices mostly use a stirring rod to mix the biogas with the added additives during use, which has poor mixing effect and certain defects.

[0003] The defects of the existing garbage biogas liquid treatment device are:

[0004] 1. Patent document, providing a biogas slurry treatment device for food waste, relating to the technical field of food waste treatment, comprising a base plate, a support rod installed on the top of the base plate, an oil outlet mechanism provided on the top of the base plate, the oil outlet mechanism comprising a hydraulic rod connected to the top of the base plate, a fixed plate installed on the top of the hydraulic rod, a telescopic shell installed on the top of the fixed plate, a load-bearing shell installed on the top of the telescopic shell, and an oil outlet opened through the port of the load-bearing shell. The utility model can float some vegetable oil and animal oil contained in the food waste on the top of the load-bearing shell. When all the oil in the food waste floats on the top of the load-bearing shell, the telescopic shell shrinks upward, causing the food waste inside the load-bearing shell to be squeezed and moved upward. The vegetable oil and animal oil move upward to the oil outlet and are discharged from the oil outlet. However, the food waste biogas slurry treatment device described in the above-mentioned public document mainly considers squeezing out the vegetable oil and animal oil in the food waste by squeezing, and does not take into account that most existing food waste treatment devices directly add flocculants into the flocculation tank during use, resulting in poor mixing efficiency.

[0005] 2. The patent document discloses a biogas slurry treatment device for food waste and kitchen waste, including a pretreatment module, an ammonia separation module, a separation module and a re-separation module. The pretreatment module includes a dehydrator and a sedimentation tank, the liquid outlet of the dehydrator is connected to the sedimentation tank through a first pipeline, and the bottom of the sedimentation tank is also connected to the inlet of the dehydrator through a second pipeline; the ammonia separation module includes an ammonia separation device, and the ammonia separation device is connected to the outlet of the sedimentation tank; the separation module includes an A / O device and an MBR device, the inlet of the A / O device is connected to the ammonia separation device, and the outlet of the A / O device is connected to the inlet of the MBR device; the re-separation module includes a nanofiltration device, a nanofiltration clean water tank and a reverse osmosis device, the inlet of the nanofiltration device is connected to the outlet of the MBR device, the outlet of the nanofiltration device is connected to the nanofiltration clean water tank, and the reverse osmosis device is connected to the nanofiltration clean water tank, so as to improve the cleaning effect of the biogas slurry. However, the food waste biogas slurry treatment device in the above-mentioned public document mainly considers how to improve the cleaning effect of the biogas slurry, and does not take into account the problem that the existing food waste treatment device is not convenient to disassemble and assemble according to needs during use, and has poor flexibility;

[0006] 3. Patent document, relating to a device for treating biogas slurry from anaerobic digestion of food waste, including a mixing barrel, a stirring device and a dosing device; the mixing barrel is used to hold biogas slurry, the stirring device is arranged in the mixing barrel, including a rotating shaft, a drug receiving mechanism is arranged on the rotating shaft, the drug receiving mechanism includes a support rod and a drug receiving trough, one end of the support rod is connected to the rotating shaft, and the other end is connected to the drug receiving trough, and a plurality of drug outlet holes are provided at the bottom of the drug receiving trough; the dosing device is arranged on the top of the mixing barrel, including a drug dosing bin for storing drugs, and a drug dosing pipe connected to the lower end of the drug dosing bin, the drug dosing pipe extends into the mixing barrel, and the drug dosing pipe is located above the drug receiving trough, for adding drugs into the drug receiving trough, and a stop valve and a detector for detecting the drug receiving trough are also provided between the dosing pipe and the drug dosing barrel. By cooperating with the drug receiving mechanism and the drug dosing device, the drug is evenly added to the biogas slurry, accelerating mixing and increasing the reaction rate, thereby improving production efficiency. However, the food waste biogas slurry treatment device described in the above-mentioned public document mainly focuses on how to increase the reaction rate, and does not take into account that the existing food waste biogas slurry treatment device does not have a sludge interception function during use, resulting in poor practicality.

[0007] 4. Patent document, relating to a food waste anaerobic digestion sludge treatment device, comprising a reactor cylinder, a servo motor and a stirring device; the reactor cylinder is provided with a water inlet and a water outlet, and the servo motor is provided at the top of the reactor cylinder; the stirring device is provided in the reactor cylinder, and is composed of a drive shaft, a rotating rod, a connecting rod, a pressure plate, a sliding sleeve and a spring; the sliding sleeve and the pressure plate in the stirring device described in the utility model form a cavity, and cooperate with the forward and reverse rotation of the servo motor so that during the large circulation of the liquid in the reactor cylinder, a part of the liquid continuously enters the cavity and is discharged, thereby increasing the surging of the liquid inside and effectively improving the stirring efficiency. However, the food waste sludge treatment device in the above-mentioned public document mainly considers how to improve the stirring efficiency during use, and does not take into account that the existing food waste sludge treatment device is not convenient for deammoniation treatment of garbage sludge during use. Summary of the Invention

[0008] The object of the present invention is to provide a device and method for treating food waste biogas slurry, so as to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for treating food waste biogas slurry, comprising a base, a coagulation sedimentation tank being installed on the top of the base, three groups of symmetrically arranged slots being provided on the top of the coagulation sedimentation tank, and sockets being provided inside the slots;

[0010] The interior of the socket is fitted with an insertion rod, and a card block is installed on the top of the insertion rod. Storage boxes 1 are installed on the surfaces of the two groups of card blocks that are close to each other, and the storage box 1 is located inside the coagulation sedimentation tank. The tops of the two groups of storage boxes 1 are penetrated by notches, and the notches are semicircular in structure. One side outer wall of one group of storage boxes 1 is provided with front and rear arranged limiting holes, and one side outer wall of the other group of storage boxes 1 is provided with front and rear arranged limiting rods. The front, back and bottom of the two groups of storage boxes 1 are provided with evenly arranged nozzles;

[0011] A one-way valve is installed inside the nozzle, a pull ring is installed on the top of the block, and connecting pipes are installed on the tops of the two groups of storage boxes.

[0012] Preferably, the top of the coagulation sedimentation tank is equipped with mounting holes arranged symmetrically in front and back, and mounting rods are embedded inside the four groups of mounting holes. A storage plate is installed on the top of the four groups of mounting rods, and three groups of equidistantly arranged servo motors are installed on the top of the storage plate. The output ends of the three groups of servo motors are all passed through the top of the storage plate and stirring rods are installed.

[0013] Preferably, the inner walls on both sides of the coagulation sedimentation tank are installed with partitions arranged in front and behind, and the bottom of the partition is connected to the bottom wall of the coagulation sedimentation tank, the partition and the slot are spaced apart, and a water outlet pipe is embedded in the front of the rear partition, and the water outlet pipe is located in front of the rear storage box 1. A one-way valve 2 and a filter screen are installed inside the water outlet pipe, and the filter screen is located in front of the one-way valve 2. The rear partition is a hollow structure, and the top of the rear partition is installed with evenly arranged storage boxes 2, and the top wall of the storage box 2 is installed with a rotating motor. The top of the rear partition is penetrated by a uniformly arranged filter screen. The slot is located on the inner side of the storage box two, the output end of the rotating motor is equipped with a connecting rod, and the connecting rod is located on the inner side of the slot, the bottom of the connecting rod is equipped with a baffle one, and the baffle one is engaged with the upper water outlet pipe, the outer surface of the baffle one is equipped with a connecting rod one, the bottom end of the connecting rod one is equipped with a baffle two, and the baffle two is engaged with the middle water outlet pipe, the outer surface of the baffle two is equipped with a connecting rod two, the bottom end of the connecting rod two is equipped with a baffle three, and the baffle three is engaged with the lower water outlet pipe, and the outer surface of the baffle three is connected to the inner surface of the lower water outlet pipe through a shaft.

[0014] Preferably, two groups of deamination tower bodies arranged front and back are installed on the top of the base, and the deamination tower bodies are located on one side of the coagulation sedimentation tank. The top of the base is equipped with sludge pumps arranged front and back, the front sludge pump is located in front of the coagulation sedimentation tank, and the rear sludge pump is located between the rear deamination tower body and the coagulation sedimentation tank. Liquid inlet pipes are installed on the outer surfaces of the two groups of deamination tower bodies. The input end of the front sludge pump is equipped with a water pumping pipe 1, and one end of the water pumping pipe 1 is inserted into the space composed of the front partition and the coagulation sedimentation tank. The output end of the front sludge pump is equipped with a liquid infusion pipe 1, and one end of the liquid infusion pipe 1 is connected to one end of the front liquid inlet pipe. The input end of the rear sludge pump is equipped with a water pumping pipe 2, and one end of the water pumping pipe 2 is connected to one end of the rear liquid inlet pipe. The output end of the rear sludge pump is equipped with a liquid infusion pipe 2, and one end of the liquid infusion pipe 2 extends into the space composed of the two groups of partitions and the coagulation sedimentation tank.

[0015] Preferably, the limiting rod is engaged with the limiting hole, the two groups of notches are respectively located in the middle of the limiting hole and the limiting rod, the two groups of notches are combined to form a circular structure, and the storage box is a hollow structure;

[0016] The outer surface of the bottom end of the stirring rod is welded with stirring rods evenly arranged up and down, and the stirring rods are located below the storage box one, the stirring rods are located on the inner side of the slot, and the storage plate is an inverted "concave" shape structure;

[0017] The two groups of baffle well coagulation sedimentation tanks are divided into three spaces. The rotating motor is started, and the baffle plate is driven to rotate under the action of the connecting rod, so that the baffle plate can rotate in the upper outlet pipe, and as the rotation angle increases, the water can flow out from the outlet pipe.

[0018] Preferably, three groups of blowers arranged front and back are installed on the top of the storage plate, and the blowers are respectively located in front of and behind the servo motor. The output ends of the front and rear groups of blowers are connected to air supply pipes, and one end of the two groups of air supply pipes is respectively connected to the connecting pipes on the two groups of storage boxes.

[0019] Preferably, a feed pipe is installed on the top of the storage box 1, and a cap is threadedly connected to the outer surface of the feed pipe, and the connecting pipe is located between the cap and the notch.

[0020] Preferably, the outer wall of one side of the coagulation sedimentation tank is provided with equidistantly arranged sewage pipes, and the sewage pipes are respectively connected to the inner wall of one side of the coagulation sedimentation tank, the sewage pipes are spaced apart from the partitions, and the outer surface of the sewage pipes is installed with an electronic valve.

[0021] Preferably, the method for treating the kitchen waste biogas slurry is as follows:

[0022] S1. Before using the food waste biogas slurry treatment device, first insert the mounting rod into the mounting hole, and fix the storage plate above the coagulation sedimentation tank by fitting the mounting rod into the mounting hole;

[0023] S2. When processing food waste biogas slurry, first pour the biogas slurry into the space formed by the front partition and the coagulation sedimentation tank, and pour an appropriate amount of ferrous sulfate heptahydrate solution mixed with water into one of the storage boxes 1 through the feed pipe. Then pour an appropriate amount of slag or slaked lime solution mixed with water into the other storage box 1, and screw on the cap. The amount of ferrous sulfate heptahydrate added is 30,000-50,000 mg / L, and the amount of slag or slaked lime added is 100,000-150,000 mg / L.

[0024] S3. Then start the sludge pump in front, and then the biogas slurry after pH adjustment can be extracted through the water pumping pipe 1, and the biogas slurry is transported into the main body of the deammonification tower in front through the liquid delivery pipe 1 for aeration and stripping. The stripping time is 9-18 hours.

[0025] S4. Then start the rotating motor in the storage box 2, and then it can drive the baffle 1 to rotate in the upper water outlet pipe under the action of the connecting rod. At the same time, as the baffle 1 rotates, the baffle 2 and the baffle 3 can rotate in the middle and lower water outlet pipes under the action of the connecting rod 1 and the connecting rod 2. Then, the biogas slurry after flocculation and sedimentation in the second space will flow into the third group of spaces formed by the rear partition and the coagulation sedimentation tank through the outlet pipe, and the flocculants brought up during the water flow will be intercepted by the filter plate. The setting of the one-way valve 2 can effectively prevent the biogas slurry in the third space from flowing back into the second space.

[0026] Preferably, the step S1 further includes the following steps:

[0027] S11. Then, the two sets of storage boxes are placed on the surface of the stirring rod so that the stirring rod can be located in the middle of the notch on the two sets of storage boxes. Then, the two sets of storage boxes are pushed until the limiting rod on one set of storage boxes is able to fit into the limiting hole on the other set of storage boxes. Then, the storage box is pushed downward so that the insertion rod can be inserted into the inside of the insertion hole. The storage box is fixed in the coagulation sedimentation tank by fitting the card block into the slot. The connecting pipe is connected to the blower through the air supply pipe.

[0028] In the step S2, the following steps are also included:

[0029] S21. Then, one of the blowers is started, and air is blown into the first storage box through the air supply pipe, so that the ferrous sulfate heptahydrate solution in the first storage box can be sprayed into the biogas slurry in the coagulation sedimentation tank through the nozzle under pressure. At the same time, the servo motor on the storage plate is started, which drives the stirring rod to rotate, so that the raw liquid in the first space can be fully mixed with the ferrous sulfate heptahydrate solution. The stirring time is 60-90 minutes.

[0030] S22, then starting another set of blowers to allow the slag or slaked lime solution in the other set of storage tanks to be sprayed out through the nozzles, and then the pH value of the biogas slurry can be adjusted by the slag or slaked lime solution until the pH value of the biogas slurry is maintained above 11.0, and then repeating step S21 to ensure that the stirring time of the stirring rod is 45-60 minutes;

[0031] In step S3, the following steps are also included:

[0032] S31. After deammonification is completed, the rear sludge pump is started, and then the biogas slurry can be pumped out from the rear deammonification tower body through the second pumping pipe, and the deammonified biogas slurry is transported into the second space composed of two sets of partitions and the coagulation sedimentation tank through the second liquid delivery pipe;

[0033] S32, then, similar to steps S21 and S22, pour a small amount of anionic polyacrylamide and concentrated sulfuric acid into each of the two storage tanks. The amount of anionic polyacrylamide added is 1-2 mg / L, and the stirring time is 10-20 minutes. The anionic polyacrylamide adsorbs suspended solid particles in the water, causing them to form bridges or aggregate into large flocs through charge neutralization, thereby accelerating the sedimentation of suspended particles in the biogas slurry to a certain extent. The amount of concentrated sulfuric acid required is 2000-5000 mg / L, and the stirring time is 5 minutes, so that the concentrated sulfuric acid can adjust the pH value of the biogas slurry after the first flocculation and precipitation to between 5.5 and 6.0.

[0034] In the step S4, the following steps are also included:

[0035] S41. Then, add an appropriate amount of chelating agent and non-ionic polyacrylamide into the rearmost storage box 1, and spray them into the biogas slurry after the secondary pH adjustment through a nozzle, wherein the addition amount of the chelating agent is 5000-10000 mg / L, and the stirring time is 60-90 minutes, so as to achieve the purpose of coagulation. The stirring time of the non-ionic polyacrylamide is 10-20 minutes, and the addition amount is 1-2 mg / L, which can accelerate the settling rate of suspended particles in the biogas slurry to a certain extent, thereby improving the treatment efficiency and effect of the food waste biogas slurry.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The present invention is equipped with a base, a coagulation sedimentation tank, a slot, a socket, an insertion rod, a storage box 1, a limiting hole, a limiting rod, a nozzle and a one-way valve 1. When treating food waste biogas slurry, first, the biogas slurry raw liquid is poured into the first space formed by the front partition and the coagulation sedimentation tank, and the two sets of storage boxes 1 are connected together by engaging the limiting rod and the limiting hole. Then, the insertion rod is inserted into the inside of the socket, and then the storage box 1 can be installed in the inside of the coagulation sedimentation tank by engaging the block and the slot. In subsequent use, the wind blown by the blower is transported through the connecting pipe and blown into the inside of the storage box 1, so that the solvent contained in the storage box 1 can be sprayed into the inside of the biogas slurry raw liquid through the nozzle, which can improve the treatment efficiency of the food waste biogas slurry to a certain extent.

[0038] 2. The present invention is equipped with a mounting hole, a mounting rod, a storage plate, a servo motor and a stirring rod. The storage plate is installed on the coagulation sedimentation tank by engaging the mounting rod with the mounting hole. Then, the servo motor can be started to drive the stirring rod to rotate. Then, the stirring rod can be used to mix the garbage biogas slurry raw liquid and the added additives. The detachable connection of the storage plate can improve the flexibility of the food waste biogas slurry treatment device when used to a certain extent.

[0039] 3. The present invention is equipped with a partition, a second storage box, a rotating motor, a connecting rod, a first baffle, a second one-way valve and a filter screen. When the biogas slurry in the second space undergoes flocculation and sedimentation, the rotating motor in the second storage box is started, and then the first baffle is driven to rotate in the upper outlet pipe under the action of the connecting rod. Then, the second baffle and the third baffle are able to rotate in the middle and lower outlet pipes along with the first baffle. Then, the biogas slurry in the second space flows through the outlet pipe into the third group of spaces formed by the rear partition and the coagulation and sedimentation tank. During the flow of the biogas slurry, the filter screen can intercept the flocculants in the biogas slurry.

[0040] 4. The present invention is equipped with a deamination tower body, a sludge pump, a liquid inlet pipe, a liquid infusion pipe 1, a water extraction pipe 1, a liquid infusion pipe 2 and a water extraction pipe 2. After the pH adjustment of the biogas slurry is completed in the first group of spaces, the front sludge pump can be started, and the biogas slurry can be pumped out through the water extraction pipe 1, and the biogas slurry raw liquid can be transported into the front deamination tower body through the liquid infusion pipe 1 for aeration and stripping. After deamination is completed, the rear sludge pump is started, and then the biogas slurry raw liquid can be pumped out from the rear deamination tower body through the water extraction pipe 2, and the deammonified biogas slurry raw liquid can be transported into the second space composed of two groups of partitions and the coagulation sedimentation tank through the liquid infusion pipe 2, thereby facilitating the next step of flocculation and sedimentation operation on the deammonified biogas slurry, and to a certain extent, the effect of the food waste biogas slurry treatment can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0042] Figure 2 This is a schematic diagram of the planar assembly structure of the deamination tower body and the sludge pump of the present invention;

[0043] Figure 3 This is a schematic diagram of the planar assembly structure of the partition of the present invention;

[0044] Figure 4 Schematic diagram of the assembly structure of the storage plate of the present invention;

[0045] Figure 5 This is a schematic diagram of the planar assembly structure of the storage box 1 of the present invention;

[0046] Figure 6 A top view of a storage box 1 of the present invention;

[0047] Figure 7 This is a schematic diagram of the assembly structure of the storage box 1 of the present invention;

[0048] Figure 8 Schematic diagram of the assembly structure of the coagulation sedimentation tank of the present invention;

[0049] Figure 9 It is a process flow chart of the present invention.

[0050] In the figure: 1, base; 2, coagulation sedimentation tank; 3, slot; 4, socket; 5, plug rod; 6, block; 7, storage box 1; 8, limit hole; 9, limit rod; 10, nozzle; 11, one-way valve 1; 12, pull ring; 13, connecting pipe; 14, notch; 15, mounting hole; 16, mounting rod; 17, storage plate; 18, servo motor; 19, stirring rod; 20, blower; 21, air supply pipe; 22, partition; 23, water outlet pipe; 24, storage Material box two; 25. Rotating motor; 26. Connecting rod; 27. Baffle one; 28. Connecting rod one; 29. Baffle two; 30. Connecting rod two; 31. Baffle three; 32. One-way valve two; 33. Filter plate; 34. Feed pipe; 35. Cover cap; 36. Deamination tower body; 37. Sludge pump; 38. Liquid inlet pipe; 39. Liquid infusion pipe one; 40. Pumping pipe one; 41. Pumping pipe two; 42. Liquid infusion pipe two; 43. Sewage pipe; 44. Electronic valve. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0054] See also Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 , the present invention provides an embodiment: a device for treating food waste biogas slurry, comprising a base 1, an air supply pipe 21, a feed pipe 34 and a sewage pipe 43, a coagulation sedimentation tank 2 is installed on the top of the base 1, three groups of symmetrically arranged slots 3 are provided on the top of the coagulation sedimentation tank 2, a socket 4 is provided inside the slot 3, a plug rod 5 is embedded in the socket 4, a card block 6 is installed on the top of the plug rod 5, and a storage box 7 is installed on the surfaces close to each other of the two groups of card blocks 6, and the storage box 7 is located inside the coagulation sedimentation tank 2, and the tops of the two groups of storage boxes 7 are both penetrated by a notch 14, and the notch 14 is a semicircular structure, one group of storage boxes The outer wall of one side of the storage box 7 is provided with a limit hole 8 arranged front and back, and the outer wall of one side of the other storage box 7 is installed with a limit rod 9 arranged front and back. The front, back and bottom of the two storage boxes 7 are provided with uniformly arranged nozzles 10, and a one-way valve 11 is installed inside the nozzle 10. A pull ring 12 is installed on the top of the block 6. A connecting pipe 13 is installed on the top of the two storage boxes 7. The limit rod 9 is embedded in the limit hole 8. The two groups of notches 14 are respectively located in the middle of the limit hole 8 and the limit rod 9. The combination of the two groups of notches 14 forms a circular structure. The storage box 7 is a hollow structure. The top of the storage plate 17 is installed with three groups of front and back arranged The blower 20 is located in front of and behind the servo motor 18 respectively. The output ends of the front and rear blowers 20 are connected to the air supply pipe 21, and one end of the two air supply pipes 21 is connected to the connecting pipe 13 on the two storage boxes 7 respectively. The top of the storage box 7 is equipped with a feed pipe 34. The outer surface of the feed pipe 34 is threadedly connected to the cap 35. The connecting pipe 13 is located between the cap 35 and the notch 14. The outer wall of one side of the coagulation sedimentation tank 2 is provided with equidistantly arranged sewage pipes 43, and the sewage pipes 43 are respectively connected to the inner wall of one side of the coagulation sedimentation tank 2. The sewage pipes 43 are spaced apart from the partition 22, and the sewage An electronic valve 44 is installed on the outer surface of the tube 43, and the top of the coagulation sedimentation tank 2 is installed with mounting holes 15 arranged symmetrically in front and back. The inside of the four groups of mounting holes 15 is embedded with mounting rods 16. The top of the four groups of mounting rods 16 is installed with a storage plate 17. Three groups of equidistantly arranged servo motors 18 are installed on the top of the storage plate 17. The output ends of the three groups of servo motors 18 are all passed through the top of the storage plate 17 and a stirring rod 19 is installed. The outer surface of the bottom end of the stirring rod 19 is welded with stirring rods evenly arranged up and down, and the stirring rods are located below the storage box 7. The stirring rod 19 is located on the inner side of the slot 14, and the storage plate 17 is an inverted "concave" structure.

[0055] Furthermore, when processing the food waste biogas slurry, first, the placement plate 17 is fixed to the coagulation sedimentation tank 2 by engaging the mounting rod 16 and the mounting hole 15, and then the biogas raw liquid is poured into the first space formed by the front partition 22 and the coagulation sedimentation tank 2, and then the two groups of storage boxes 7 are connected together by engaging the limiting rod 9 and the limiting hole 8, so that the notch 14 can be located on the outside of the stirring rod 19, and then the storage box 7 is pushed downward, and then the block 6 can be driven to be located inside the slot 3, and the storage box 7 can be fixed to the coagulation sedimentation tank 2 by engaging the insertion rod 5 and the insertion hole 4, and then the ferrous sulfate heptahydrate solution and the slag or slaked lime solution can be poured into the two groups of storage boxes 7 respectively through the feeding pipe 34, and then one of the blowers 20 is started first as needed, and the air supply pipe 2 is used to supply the slag or slaked lime solution. 1 Blow air into the storage box 7 so that the ferrous sulfate heptahydrate solution in the storage box 7 can be sprayed into the biogas slurry in the coagulation sedimentation tank 2 through the nozzle 10 under pressure. At the same time, start the servo motor 18 on the storage plate 17, and then drive the stirring rod 19 to rotate, so that the raw liquid in the first space can be fully mixed with the ferrous sulfate heptahydrate solution, thereby playing a coagulation role. Then start another set of blowers 20, so that the slag or slaked lime solution in the other set of storage boxes 7 can be sprayed out along with the nozzle 10, so as to achieve the purpose of adjusting the pH value of the biogas slurry. To a certain extent, it can provide convenience for the subsequent deammonification work. Through the setting of the sewage pipe 43, the electronic valve 44 can be opened during the subsequent sludge treatment, and then the sludge can be pumped out through the sewage pipe 43.

[0056] See also Figure 3The present invention provides an embodiment of a device for treating kitchen waste sludge, comprising a partition 22 and a filter screen 33. The inner walls of both sides of the coagulation sedimentation tank 2 are provided with partitions 22 arranged in front and behind, and the bottom of the partition 22 is connected to the bottom wall of the coagulation sedimentation tank 2, the partition 22 is spaced apart from the slot 3, and an outlet pipe 23 is embedded in the front of the rear partition 22. The outlet pipe 23 is located in front of the rear storage box 7, and a one-way valve 23 and a filter screen 33 are installed inside the outlet pipe 23, and the filter screen 33 is located in front of the one-way valve 23. The rear partition 22 is a hollow structure, and a storage box 24 is evenly arranged on the top of the rear partition 22. A rotating motor 25 is installed on the top wall of the storage box 24. The top of the rear partition 22 is provided with evenly arranged slots, and the slots are located on the inner side of the storage box 24. The output end of the rotating motor 25 is provided with a connecting Rod 26, and the connecting rod 26 is located on the inner side of the slot, and a baffle 1 27 is installed at the bottom of the connecting rod 26, and the baffle 1 27 is engaged with the upper water outlet pipe 23, and a connecting rod 1 28 is installed on the outer surface of the baffle 1 27, and a baffle 29 is installed at the bottom end of the connecting rod 1 28, and the baffle 29 is engaged with the middle water outlet pipe 23, and a connecting rod 2 30 is installed on the outer surface of the baffle 29, and a baffle 31 is installed at the bottom end of the connecting rod 2 30, and the baffle 31 is engaged with the lower water outlet pipe 23, and the outer surface of the baffle 31 is connected to the inner surface of the lower water outlet pipe 23 through a shaft. The two groups of partitions 22 and the coagulation sedimentation tank 2 are divided into three spaces. The rotating motor 25 is started, and the baffle 1 27 is driven to rotate under the action of the connecting rod 26, so that the baffle 1 27 can rotate in the upper water outlet pipe 23, and as the rotation angle increases, the water can flow out from the water outlet pipe 23.

[0057] Furthermore, the biogas slurry after deammonification is pumped into the second group of spaces through the sludge pump 37, and then a small amount of anionic polyacrylamide and concentrated sulfuric acid are poured into the two groups of storage boxes 1 7 respectively, and the biogas slurry is stirred by the stirring rod 19, and then the anionic polyacrylamide can be used to adsorb the solid particles suspended in the water, and the concentrated sulfuric acid can be used to adjust the pH value of the biogas slurry after a flocculation and precipitation to between 5.5 and 6.0, and then the rotating motor 25 in the storage box 2 24 is started, and then the baffle 1 27 can be driven to rotate in the upper outlet pipe 23 under the action of the connecting rod 26, and then the baffle 2 29 and the baffle 3 31 can be driven to rotate in the middle and lower outlet pipes 23, and then the second space is filled with water. After flocculation and sedimentation, the biogas slurry will flow into the third group of spaces formed by the rear partition 22 and the coagulation sedimentation tank 2 through the outlet pipe 23, and the flocculants brought up during the water flow will be intercepted by the filter plate 33. Then, an appropriate amount of chelating agent and non-ionic polyacrylamide are added to the rear storage box 7, and sprayed into the biogas slurry after the secondary pH value adjustment through the nozzle 10. To a certain extent, the sedimentation rate of suspended particles in the biogas slurry can be accelerated, thereby improving the treatment efficiency and effect of the food waste biogas slurry. In addition, the setting of the one-way valve 2 32 can effectively prevent the biogas slurry in the third space from flowing back into the second space, which can improve the flexibility and practicality of the food waste treatment device when used to a certain extent.

[0058] See also Figure 1 and Figure 2 The present invention provides an embodiment of a device for treating food waste biogas slurry, comprising a deamination tower body 36 and a water pump 41. Two groups of deamination tower bodies 36 arranged front and back are installed on the top of the base 1, and the deamination tower bodies 36 are located on one side of the coagulation sedimentation tank 2. The top of the base 1 is equipped with sludge pumps 37 arranged front and back. The front sludge pump 37 is located in front of the coagulation sedimentation tank 2, and the rear sludge pump 37 is located between the rear deamination tower body 36 and the coagulation sedimentation tank 2. The outer surfaces of the two groups of deamination tower bodies 36 are both equipped with liquid inlet pipes 38. The input end of the front sludge pump 37 is connected to the deamination tower body 36. A water pumping pipe 40 is installed, and one end of the water pumping pipe 40 is inserted into the space formed by the front partition 22 and the coagulation sedimentation tank 2. The output end of the front sludge pump 37 is installed with a liquid infusion pipe 39, and one end of the liquid infusion pipe 39 is connected to one end of the front liquid inlet pipe 38. The input end of the rear sludge pump 37 is installed with a water pumping pipe 2 41, and one end of the water pumping pipe 2 41 is connected to one end of the rear liquid inlet pipe 38. The output end of the rear sludge pump 37 is installed with a liquid infusion pipe 2 42, and one end of the liquid infusion pipe 2 42 extends into the space formed by the two groups of partitions 22 and the coagulation sedimentation tank 2.

[0059] Furthermore, the front sludge pump 37 is started, and then the biogas slurry can be transported into the front deamination tower body 36 through the infusion pipe 1 39 for aeration and stripping. After the deamination is completed, the rear sludge pump 37 is started, so that the infusion pipe 2 42 can transport the deammonified biogas slurry into the second space. Then, a small amount of anionic polyacrylamide is used to adsorb the solid particles suspended in the water, and the pH value of the biogas slurry after flocculation and precipitation is adjusted to between 5.5 and 6.0 by concentrated sulfuric acid, which can improve the treatment effect of the food waste biogas slurry to a certain extent.

[0060] Furthermore, the method for treating the kitchen waste biogas slurry is as follows:

[0061] S1. Before using the food waste biogas slurry treatment device, first insert the mounting rod 16 into the mounting hole 15, and fix the placement plate 17 above the coagulation sedimentation tank 2 by fitting the mounting rod 16 into the mounting hole 15;

[0062] S2. When processing food waste biogas slurry, first pour the raw biogas slurry into the space formed by the front partition 22 and the coagulation sedimentation tank 2, and pour an appropriate amount of ferrous sulfate heptahydrate solution mixed with water into one group of storage boxes 7 through the feed pipe 34. Then pour an appropriate amount of slag or slaked lime solution mixed with water into the other group of storage boxes 7, and screw on the cap 35. The amount of ferrous sulfate heptahydrate added is 30,000-50,000 mg / L, and the amount of slag or slaked lime added is 100,000-150,000 mg / L.

[0063] S3. Then, the front sludge pump 37 is started. Then, the biogas slurry after pH adjustment can be extracted through the pumping pipe 40 and transported into the front deammonification tower body 36 through the liquid delivery pipe 39 for aeration and stripping. The stripping time is 9-18 hours.

[0064] S4. Then start the rotating motor 25 in the storage box 24, and then drive the baffle 1 27 to rotate in the upper water outlet pipe 23 under the action of the connecting rod 26. At the same time, as the baffle 1 27 rotates, the baffle 2 29 and the baffle 3 31 can rotate in the middle and lower water outlet pipes 23 under the action of the connecting rod 1 28 and the connecting rod 2 30. Then, the biogas slurry after flocculation and sedimentation in the second space will flow into the third group of spaces formed by the rear partition 22 and the coagulation sedimentation tank 2 through the outlet pipe 23, and the flocculants brought up during the water flow will be intercepted by the filter plate 33. The setting of the one-way valve 2 32 can effectively prevent the biogas slurry in the third space from flowing back into the second space.

[0065] In step S1, the following steps are also included:

[0066] S11. Next, the two sets of storage boxes 7 are placed on the surfaces of the stirring rods 19 so that the stirring rods 19 are located in the middle of the notches 14 on the two sets of storage boxes 7. Then, the two sets of storage boxes 7 are pushed until the limiting rods 9 on one set of storage boxes 7 are engaged with the limiting holes 8 on the other set of storage boxes 7. Then, the storage boxes 7 are pushed downward so that the insertion rods 5 can be inserted into the interior of the insertion holes 4. The storage boxes 7 are fixed in the coagulation sedimentation tank 2 by engaging the clamping blocks 6 with the slots 3. Finally, the connecting pipe 13 is connected to the blower 20 through the air supply pipe 21.

[0067] In step S2, the following steps are also included:

[0068] S21. Then, one of the blowers 20 is started, and air is blown into the storage box 7 through the air supply pipe 21, so that the ferrous sulfate heptahydrate solution in the storage box 7 can be sprayed into the biogas slurry in the coagulation sedimentation tank 2 through the nozzle 10 under pressure. At the same time, the servo motor 18 on the storage plate 17 is started, and the stirring rod 19 is driven to rotate, so that the raw liquid in the first space can be fully mixed with the ferrous sulfate heptahydrate solution. The stirring time is 60-90 minutes.

[0069] S22, then start another set of blowers 20, so that the slag or slaked lime solution in the other set of storage boxes 7 can be sprayed out through the nozzles 10, and then the pH value of the biogas slurry can be adjusted by the slag or slaked lime solution until the pH value of the biogas slurry is maintained above 11.0, and then repeat the step S21, so that the stirring time of the stirring rod 19 is 45-60 minutes;

[0070] In step S3, the following steps are also included:

[0071] S31. After deammonification is completed, the rear sludge pump 37 is started, and then the biogas slurry can be pumped out from the rear deammonification tower body 36 through the second pumping pipe 41, and the deammonified biogas slurry is transported into the second space formed by the two sets of partitions 22 and the coagulation sedimentation tank 2 through the second liquid delivery pipe 42;

[0072] S32, then, similar to steps S21 and S22, pour a small amount of anionic polyacrylamide and concentrated sulfuric acid into each of the two storage boxes 7, wherein the amount of anionic polyacrylamide added is 1-2 mg / L, and the stirring time is 10-20 minutes. The anionic polyacrylamide adsorbs solid particles suspended in the water, causing bridges to form between the particles or causing the particles to agglomerate to form large flocs through charge neutralization, thereby accelerating the sedimentation of suspended particles in the biogas slurry to a certain extent. The amount of concentrated sulfuric acid required is 2000-5000 mg / L, and the stirring time is 5 minutes, so that the concentrated sulfuric acid can adjust the pH value of the biogas slurry after the first flocculation and precipitation to between 5.5 and 6.0.

[0073] In step S4, the following steps are also included:

[0074] S41. Then, an appropriate amount of chelating agent and non-ionic polyacrylamide is added to the rearmost storage box 7, and sprayed into the biogas slurry after the secondary pH adjustment through the nozzle 10, wherein the dosage of the chelating agent is 5000-10000 mg / L, and the stirring time is 60-90 minutes, so as to achieve the purpose of coagulation. The stirring time of the non-ionic polyacrylamide is 10-20 minutes, and the dosage is 1-2 mg / L, which can accelerate the settling rate of suspended particles in the biogas slurry to a certain extent, thereby improving the treatment efficiency and effect of the food waste biogas slurry.

[0075] Working principle: When processing food waste biogas slurry, first pour the biogas slurry stock solution into the space formed by the front partition 22 and the coagulation sedimentation tank 2, and pour the ferrous sulfate heptahydrate solution and slag or slaked lime solution into the two groups of storage boxes 7 respectively through the feed pipe 34, then start one of the blowers 20 as needed, and blow air into the storage box 7 through the air supply pipe 21, so that the ferrous sulfate heptahydrate solution in the storage box 7 can be sprayed into the biogas slurry stock solution in the coagulation sedimentation tank 2 through the nozzle 10 under the action of pressure, at the same time, start the servo motor 18 to drive the stirring rod 19 to rotate, so that the stock solution in the first space can be fully mixed with the ferrous sulfate heptahydrate solution, thereby playing a coagulation role, and then start the other group of blowers 20, so that the slag or slaked lime solution in the other group of storage boxes 7 can be sprayed out along with the nozzle 10, so as to achieve the purpose of adjusting the pH value of the biogas slurry stock solution;

[0076] Then, the front sludge pump 37 is started, and the biogas slurry can be transported into the front deammonification tower body 36 through the infusion pipe 1 39 for aeration and stripping. After the deammonification is completed, the rear sludge pump 37 is started, so that the infusion pipe 2 42 can transport the deammonified biogas slurry into the second space. Then, a small amount of anionic polyacrylamide is used to absorb the suspended solid particles in the water, and the pH value of the biogas slurry after flocculation and precipitation is adjusted to between 5.5 and 6.0 using concentrated sulfuric acid.

[0077] Then start the rotating motor 25 in the storage box 24, and then the baffle 1 27 can be driven to rotate in the upper water outlet pipe 23 under the action of the connecting rod 26, and then the baffle 2 29 and the baffle 3 31 can be driven to rotate in the middle and lower water outlet pipes 23, so that the biogas slurry in the second space will flow into the third group of spaces formed by the rear partition 22 and the coagulation sedimentation tank 2 through the water outlet pipe 23, and then add an appropriate amount of chelating agent and spray it into the biogas slurry after the secondary pH value adjustment through the nozzle 10, so as to achieve the purpose of coagulation, and accelerate the sedimentation rate of suspended particles in the biogas slurry by adding non-ionic polyacrylamide, thereby improving the treatment efficiency and effect of the food waste biogas slurry to a certain extent.

[0078] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A device for processing food waste biogas slurry, comprising a base (1), characterized in that: A coagulation sedimentation tank (2) is installed on the top of the base (1), and three groups of symmetrically arranged slots (3) are provided on the top of the coagulation sedimentation tank (2), and sockets (4) are provided inside the slots (3); The plug hole (4) is fitted with an insert rod (5), and a block (6) is installed on the top of the insert rod (5). Storage boxes (7) are installed on the surfaces of the two groups of blocks (6) close to each other, and the storage boxes (7) are located inside the coagulation sedimentation tank (2). The tops of the two groups of storage boxes (7) are penetrated by notches (14), and the notches (14) are semicircular. One side outer wall of one group of storage boxes (7) is provided with front-to-back arranged limiting holes (8), and the other side outer wall of the other group of storage boxes (7) is provided with front-to-back arranged limiting rods (9), and the front, back and bottom of the two groups of storage boxes (7) are provided with uniformly arranged nozzles (10); A one-way valve (11) is installed inside the nozzle (10), a pull ring (12) is installed on the top of the clamping block (6), and a connecting pipe (13) is installed on the top of the two sets of storage boxes (7); The top of the coagulation sedimentation tank (2) is provided with mounting holes (15) arranged symmetrically in front and back, and mounting rods (16) are embedded in the interior of the four groups of mounting holes (15). A storage plate (17) is installed on the top of the four groups of mounting rods (16). Three groups of equidistantly arranged servo motors (18) are installed on the top of the storage plate (17). The output ends of the three groups of servo motors (18) are all passed through the top of the storage plate (17) and are provided with stirring rods (19). The inner walls of both sides of the coagulation sedimentation tank (2) are installed with partitions (22) arranged in front and back, and the bottom of the partition (22) is connected to the bottom wall of the coagulation sedimentation tank (2), the partition (22) and the slot (3) are spaced apart, and a water outlet pipe (23) is embedded in the front of the rear partition (22), and the water outlet pipe (23) is located in front of the rear storage box (7). A one-way valve (32) and a filter screen (33) are installed inside the water outlet pipe (23), and the filter screen (33) is located in front of the one-way valve (32). The rear partition (22) is a hollow structure, and the top of the rear partition (22) is installed with storage boxes (24) arranged evenly, and the top wall of the storage box (24) is installed with a rotating motor (25). The top of the rear partition (22) is penetrated by slots arranged evenly, and the slots are provided with slots arranged evenly. The hole is located on the inner side of the storage box 2 (24), the output end of the rotating motor (25) is installed with a connecting rod (26), and the connecting rod (26) is located on the inner side of the slot hole, the bottom of the connecting rod (26) is installed with a baffle 1 (27), and the baffle 1 (27) is engaged with the upper water outlet pipe (23), the outer surface of the baffle 1 (27) is installed with a connecting rod 1 (28), the bottom end of the connecting rod 1 (28) is installed with a baffle 2 (29), and the baffle 2 (29) is engaged with the middle water outlet pipe (23), the outer surface of the baffle 2 (29) is installed with a connecting rod 2 (30), the bottom end of the connecting rod 2 (30) is installed with a baffle 3 (31), and the baffle 3 (31) is engaged with the lower water outlet pipe (23), and the outer surface of the baffle 3 (31) is connected to the inner surface of the lower water outlet pipe (23) through a shaft. Two groups of deamination tower bodies (36) arranged front and back are installed on the top of the base (1), and the deamination tower bodies (36) are located on one side of the coagulation sedimentation tank (2). Sludge pumps (37) arranged front and back are installed on the top of the base (1), the front sludge pump (37) is located in front of the coagulation sedimentation tank (2), and the rear sludge pump (37) is located between the rear deamination tower body (36) and the coagulation sedimentation tank (2). Liquid inlet pipes (38) are installed on the outer surfaces of the two groups of deamination tower bodies (36), and a water pumping pipe (40) is installed at the input end of the front sludge pump (37), and one end of the water pumping pipe (40) is connected to the water pump (40). Inserted into the space formed by the front partition (22) and the coagulation sedimentation tank (2), the output end of the front sludge pump (37) is installed with a liquid infusion pipe (39), and one end of the liquid infusion pipe (39) is connected to one end of the front liquid inlet pipe (38), the input end of the rear sludge pump (37) is installed with a water pumping pipe (41), and one end of the water pumping pipe (41) is connected to one end of the rear liquid inlet pipe (38), the output end of the rear sludge pump (37) is installed with a liquid infusion pipe (42), and one end of the liquid infusion pipe (42) extends into the space formed by the two groups of partitions (22) and the coagulation sedimentation tank (2).

2. The device for processing kitchen waste biogas slurry according to claim 1, characterized in that: The limiting rod (9) is fitted into the limiting hole (8), and the two groups of notches (14) are respectively located in the middle of the limiting hole (8) and the limiting rod (9). The two groups of notches (14) are combined to form a circular structure, and the storage box (7) is a hollow structure. The outer surface of the bottom end of the stirring rod (19) is welded with stirring rods evenly arranged above and below, and the stirring rods are located below the storage box (7), the stirring rod (19) is located on the inner side of the notch (14), and the storage plate (17) is in an inverted "concave" shape; The two groups of partitions (22) divide the coagulation sedimentation tank (2) into three spaces. The rotating motor (25) is started, and the baffle plate (27) is driven to rotate under the action of the connecting rod (26), so that the baffle plate (27) can rotate in the upper water outlet pipe (23). As the rotation angle increases, the water flow can flow out from the water outlet pipe (23).

3. The device for processing food waste biogas slurry according to claim 1, characterized in that: Three groups of blowers (20) arranged front and back are installed on the top of the storage plate (17), and the blowers (20) are respectively located in front of and behind the servo motor (18). The output ends of the front and rear blowers (20) are connected to air supply pipes (21), and one end of the two groups of air supply pipes (21) is respectively connected to the connecting pipes (13) on the two groups of storage boxes (7).

4. The device for processing food waste biogas slurry according to claim 1, characterized in that: A feed pipe (34) is installed on the top of each storage box (7), and a cap (35) is threadedly connected to the outer surface of the feed pipe (34). The connecting pipe (13) is located between the cap (35) and the notch (14).

5. The device for processing kitchen waste biogas slurry according to claim 1, characterized in that: One side outer wall of the coagulation sedimentation tank (2) is provided with equidistantly arranged sewage pipes (43), and the sewage pipes (43) are respectively connected to one side inner wall of the coagulation sedimentation tank (2), the sewage pipes (43) are spaced apart from the partition (22), and the outer surface of the sewage pipe (43) is installed with an electronic valve (44).

6. A method for using the device for treating food waste biogas slurry according to any one of claims 1 to 5, characterized in that: The method for treating the food waste biogas slurry is as follows: S1. Before using the food waste biogas slurry treatment device, first insert the mounting rod (16) into the interior of the mounting hole (15), and fix the placement plate (17) above the coagulation sedimentation tank (2) by engaging the mounting rod (16) with the mounting hole (15); S2. When processing the food waste biogas slurry, first pour the biogas slurry into the space formed by the front partition (22) and the coagulation sedimentation tank (2), and pour an appropriate amount of ferrous sulfate heptahydrate solution mixed with water into one of the storage boxes (7) through the feed pipe (34), and then pour an appropriate amount of slag or slaked lime solution mixed with water into the other storage box (7), and screw on the cap (35), wherein the amount of ferrous sulfate heptahydrate added is 30,000-50,000 mg / L, and the amount of slag or slaked lime added is 100,000-150,000 mg / L; S3, then start the front sludge pump (37), and then the biogas slurry after pH adjustment can be extracted through the water pumping pipe (40), and the biogas slurry can be transported into the front deammonification tower body (36) through the liquid delivery pipe (39) for aeration and stripping. The stripping time is 9-18 hours; S4, then start the rotating motor (25) in the storage box 2 (24), and then it can drive the baffle 1 (27) to rotate in the upper outlet pipe (23) under the action of the connecting rod (26). At the same time, as the baffle 1 (27) rotates, the baffle 2 (29) and the baffle 3 (31) can rotate in the middle and lower outlet pipes (23) under the action of the connecting rod 1 (28) and the connecting rod 2 (30). Then, the biogas slurry after flocculation and sedimentation in the second space will flow into the third group of spaces formed by the rear partition (22) and the coagulation sedimentation tank (2) through the outlet pipe (23), and the flocculants brought up during the water flow will be intercepted by the filter screen (33). Through the setting of the one-way valve 2 (32), the biogas slurry in the third space can be effectively prevented from flowing back into the second space.

7. The method for using the device for treating food waste biogas slurry according to claim 6, characterized in that: In the step S1, the following steps are also included: S11, then put the two groups of storage boxes (7) on the surface of the stirring rod (19), so that the stirring rod (19) can be located in the middle of the notch (14) on the two groups of storage boxes (7), then push the two groups of storage boxes (7) until the limiting rod (9) on one group of storage boxes (7) can be engaged with the limiting hole (8) on the other group of storage boxes (7), then push the storage box (7) downward so that the insertion rod (5) can be inserted into the inside of the insertion hole (4), and fix the storage box (7) in the coagulation sedimentation tank (2) by engaging the block (6) with the slot (3), and connect the connecting pipe (13) to the blower (20) through the air supply pipe (21); In step S2, the following steps are also included: S21, then start one of the blowers (20), and then blow air into the storage box (7) through the air supply pipe (21), so that the ferrous sulfate heptahydrate solution in the storage box (7) can be sprayed into the biogas slurry in the coagulation sedimentation tank (2) through the nozzle (10) under the action of pressure. At the same time, start the servo motor (18) on the storage plate (17), and then drive the stirring rod (19) to rotate, so that the raw liquid in the first space can be fully mixed with the ferrous sulfate heptahydrate solution, wherein the stirring time is 60-90 minutes; S22, then start another set of blowers (20) to allow the slag or slaked lime solution in the other set of storage tanks (7) to be ejected through the nozzles (10), and then the pH value of the biogas slurry can be adjusted by the slag or slaked lime solution until the pH value of the biogas slurry is maintained above 11.0, and then repeat the step S21, so that the stirring time of the stirring rod (19) is 45-60 minutes; In step S3, the following steps are also included: S31, after the deammoniation is completed, the rear sludge pump (37) is started, and then the biogas slurry can be pumped out from the rear deammonification tower body (36) through the second pumping pipe (41), and the deammonified biogas slurry is transported into the second space composed of two groups of partitions (22) and the coagulation sedimentation tank (2) through the second liquid delivery pipe (42); S32, then, in the same manner as step S21 and step S22, a small amount of anionic polyacrylamide and concentrated sulfuric acid are poured into the two groups of storage boxes (7), wherein the amount of anionic polyacrylamide added is 1-2 mg / L, and the stirring time is 10-20 min. The anionic polyacrylamide is used to adsorb the solid particles suspended in the water, so that bridges are formed between the particles or the particles are condensed to form large flocs through charge neutralization, thereby accelerating the sedimentation of the suspended particles in the biogas slurry to a certain extent. The amount of concentrated sulfuric acid required is 2000-5000 mg / L, and the stirring time is 5 min, so that the concentrated sulfuric acid can adjust the pH value of the biogas slurry after one flocculation and precipitation to between 5.5 and 6.0; In the step S4, the following steps are also included: S41. Then, add appropriate amount of chelating agent and non-ionic polyacrylamide into the rearmost storage box (7), and spray them into the biogas slurry after secondary pH adjustment through nozzle (10). The dosage of chelating agent is 5000-10000 mg / L, and the stirring time is 60-90 min, so as to achieve the purpose of coagulation. The stirring time of non-ionic polyacrylamide is 10-20 min, and the dosage is 1-2 mg / L, which can accelerate the sedimentation rate of suspended particles in biogas slurry to a certain extent, thereby improving the treatment efficiency and effect of food waste biogas slurry.

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