Multi-stage biogas fermentation device containing single-ring and multi-layer ring partition wall fermentation tank

Abstract

The utility model discloses a multi-stage biogas fermentation device containing a fermentation tank with a single circular ring and a multi-layer circular ring partition wall, belongs to the technical field of biogas fermentation process devices, and aims to solve the problem that a novel biogas fermentation process device needs to be researched and developed because the conventional biogas fermentation process device is a single-tank-cavity primary fermentation process device. A main body of the biogas fermentation tank is formed by connecting a central cylindrical pool annular partition wall and one or more layers of annular partition walls in a tank cavity, and 2-12 partition wall positive and negative pressure tanks which are uniformly distributed are mounted on the central cylindrical pool annular partition wall and the single-layer annular partition wall; 1-3 tank-top-mounted positive and negative pressure tanks and 2-6 raw material inoculation stirring tanks are mounted at the tank top, fermentation and inoculation raw material adding pipes are mounted at the bottoms of the raw material inoculation stirring tanks, a plurality of uniformly distributed partition wall through holes are formed in the bottom of the double-layer annular partition wall, and the tank-top-mounted positive and negative pressure tanks are provided with marsh mud discharging and conveying pipes. The multi-stage biogas fermentation process device is novel and practical in structure, and is suitable for continuous factory biogas production.

Description

Technical Field

[0001] The utility model belongs to the technical field of biogas fermentation process devices and relates to a multi-stage biogas fermentation process device. Background Art

[0002] With the continuous development of biogas fermentation production facilities and technological progress, the technical requirements for biogas fermentation tanks are becoming increasingly higher, because biogas fermentation tanks are directly related to the actual operation quality and effect of biogas fermentation production projects. In the known technology, the existing biogas fermentation tanks mainly use a single fermentation tank primary fermentation tank body, such as China Patent Authorization Announcement No. CN 213624131U discloses a continuous biogas fermentation tank, which includes a bottom plate, a tank body is installed on the top of the bottom plate, an air outlet pipe is installed on the top of the tank body, a controller is installed on one side of the tank body, and a discharge pipe is installed at the bottom of the tank body, a raw material box is fixedly connected to the side of the tank body adjacent to the controller by bolts, a feed pump is installed on the side of the raw material box close to the tank body, and a feed pipe is installed at the discharge end of the feed pump, and the feed pipe extends to the interior of the tank body; in addition, the existing biogas project using straw and straw feces as mixed raw materials has problems such as direct current, wall crusting, and difficulty in feeding and discharging materials no matter how the stirring device is added and set; but due to the structure of the existing process device, the entire feed and discharge device has a complicated structure, the process operation is cumbersome, and the fermentation tank body is a single-chamber primary fermentation process device, which is limited for the continuous factory-scale biogas production of high-concentration fermentation process, bringing inconvenience to practical application.

[0003] In view of this, in order to adapt to the actual needs of continuous development and technological progress of multi-stage biogas fermentation process equipment, it is necessary to further improve and develop new multi-stage biogas fermentation process equipment. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology and solve the problem that the existing biogas fermentation process device is a single tank chamber single-stage fermentation process device, and further research and development of new biogas fermentation process devices is needed, the purpose of this utility model is to provide a new multi-stage biogas fermentation process device with a novel and practical structure, capable of multi-stage fermentation, full utilization of raw materials, easy to use, and suitable for the continuous factory-scale biogas production of fermentation tanks in the high-concentration fermentation process of straw and straw-feces mixed raw materials.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] A multi-stage biogas fermentation device containing a single-ring and multi-layered ring partition wall fermentation tank, which includes: a biogas fermentation tank body, a raw material inoculation stirring tank, a PLC industrial controller, a positive and negative pressure tank mounted on the partition wall, and a positive and negative pressure tank mounted on the tank top. The biogas fermentation tank body is a biogas fermentation tank body consisting of a two-stage double fermentation tank pool with a central cylindrical pool and a circular partition wall connected to the fermentation tank body cavity. The central cylindrical pool is connected to the circular partition wall with 2-12 evenly distributed partitions. Wall-mounted positive and negative pressure tanks are installed, and the partition wall-mounted positive and negative pressure tanks are equipped with sludge suction and delivery pipes and liquid suction and delivery pipes for the cylindrical fermentation tank and the annular fermentation tank pool that are plugged into the inner and outer sides of the central cylindrical pool circular partition wall. The sludge suction and delivery pipes are equipped with sludge pipe control valves and liquid suction and delivery pipes are equipped with liquid pipe control valves. The tank top cover of the biogas fermentation tank body corresponds to the cylindrical fermentation tank pool in the annular partition wall of the central cylindrical pool, i.e., the auxiliary The pool is equipped with 1-3 tank top mounted positive and negative pressure tanks, and the tank body of the tank top mounted positive and negative pressure tank is equipped with an auxiliary pool sludge suction and delivery pipe and an auxiliary pool liquid suction and delivery pipe which are plugged into the central cylindrical fermentation tank pool. The auxiliary pool sludge suction and delivery pipe is equipped with an auxiliary pool sludge pipe control valve and the auxiliary pool liquid suction and delivery pipe is equipped with an auxiliary pool liquid pipe control valve. The tank top cover of the biogas fermentation tank body is equipped with 2-6 evenly distributed raw material inoculation stirring tanks corresponding to the outer annular fermentation tank pool. The raw material inoculation stirring tank is equipped with a fermentation raw material feeding hopper and an inoculation material delivery pipe. The other end of the inoculation material delivery pipe is respectively connected to the partition wall mounted positive and negative pressure tanks and the tank top mounted positive and negative pressure tanks. The bottom of the raw material inoculation stirring tank is connected to a fermentation inoculation raw material adding pipe, which is plugged into the bottom of the outer annular fermentation tank pool. The fermentation inoculation raw material adding pipe is equipped with a raw material adding pipe control valve, and the tank top mounted positive and negative pressure tanks are equipped with a sludge discharge pipe.

[0007] The above-mentioned multi-stage biogas fermentation device containing a single-ring and multi-layer circular partition wall fermentation tank, the biogas fermentation tank body is a biogas fermentation tank body composed of a multi-stage multi-ring fermentation tank tank cavity composed of 1-several layers of circular partition walls in the inner cavity outside the fermentation tank body wall to the central cylindrical pool circular partition wall, and the tank body wall of the biogas fermentation tank body is connected to each odd-numbered layer of circular partition wall with 2-12 evenly distributed partition walls installed on the positive and negative Pressure tank, and on each partition wall, there are installed 1-2 biogas residue and sludge suction and delivery pipes and 1-2 biogas liquid suction and delivery pipes respectively, which are connected to the fermentation tank pools on both sides of the circular partition wall. Each biogas residue and sludge suction and delivery pipe is installed with a biogas residue and sludge pipe control valve and each biogas liquid suction and delivery pipe is installed with a biogas liquid pipe control valve. The tank top cover of the biogas fermentation tank body corresponds to the inner and outer annular partition wall of the central cylindrical pool. The cylindrical fermentation tank is equipped with 1-3 tank top mounted positive and negative pressure tanks, and the tank body of the tank top mounted positive and negative pressure tank is equipped with an auxiliary pool sludge suction and delivery pipe and an auxiliary pool biogas liquid suction and delivery pipe connected to the central cylindrical fermentation tank, and the auxiliary pool sludge suction and delivery pipe is equipped with an auxiliary pool sludge pipe control valve and an auxiliary pool biogas liquid suction and delivery pipe is equipped with an auxiliary pool biogas liquid pipe control valve. The tank top cover of the biogas fermentation tank body is equipped with 2- There are 6 evenly distributed raw material inoculation stirring tanks, the inoculation material conveying pipes of the raw material inoculation stirring tanks are connected to the positive and negative pressure tanks installed on the partition wall and the positive and negative pressure tanks installed on the tank top, the fermentation inoculation raw material adding pipe installed at the bottom of the raw material inoculation stirring tank is inserted into the bottom of the fermentation tank pool in the outermost ring; the tank body wall of the biogas fermentation tank body is inward, and each odd-numbered layer of the annular partition wall is a solid wall, and the bottom of each even-numbered layer of the annular partition wall is provided with several evenly distributed partition wall through holes.

[0008] The above-mentioned multi-stage biogas fermentation device containing single-ring and multi-layer circular partition wall fermentation tanks, the bottom of each even-numbered circular partition wall in the main body of the biogas fermentation tank is provided with several evenly distributed partition wall through holes, which are any one of circular through holes, elliptical through holes, arched through holes, and square through holes, and the spacing between the several evenly distributed through holes is 2.0 to 3.3 meters.

[0009] The above-mentioned multi-stage biogas fermentation device contains single-ring and multi-layer circular partition wall fermentation tanks, and the positive pressure forming ends and negative pressure forming ends of the partition wall-mounted positive and negative pressure tanks and the tank top-mounted positive and negative pressure tanks are both connected to the air compression and suction systems of the air compressor and the negative pressure vacuum pump respectively by pipe joints with three-way positive and negative pressure exchange control valves.

[0010] The above-mentioned multi-stage biogas fermentation device containing single-ring and multi-layer circular partition wall fermentation tanks, the PLC industrial controller is connected by electrical wires to the electric control pressure gauge on the top of the biogas fermentation tank body, the biogas output control valve, the stirring power motor of the raw material inoculation stirring tank, the sludge discharge pipe control valve, the liquid biogas pipe control valve, the biogas residue and sludge pipe control valve and the three-way positive and negative pressure exchange control valve.

[0011] The above-mentioned multi-stage biogas fermentation device containing single-ring and multi-layer circular partition wall fermentation tanks, the pipe heads of the liquid biogas suction and delivery pipe and the auxiliary pool liquid biogas suction and delivery pipe are inserted into the bottom of the outer circular fermentation tank pool, and the pipe heads of the biogas residue and sludge suction and delivery pipe and the auxiliary pool sludge suction and delivery pipe are inserted into the biogas residue and sludge layer in the middle position of the outer circular fermentation tank pool.

[0012] The above-mentioned multi-stage biogas fermentation device containing single-ring and multi-layer ring partition wall fermentation tanks, the raw material inoculation stirring tank is a stirring tank body with a rectangular tank body on the upper part and a semicircular tank body on the lower part, a fermentation raw material feeding hopper is installed on the top of the tank body of the stirring tank body, and a fermentation inoculation raw material addition pipe with a raw material addition pipe control valve is installed at the bottom of the tank body, a stirrer is installed at the lower part of the inner cavity of the stirring tank body, and a stirring motor is installed at the shaft head of the stirrer, and an inoculation material injection pipe is installed at the upper part of the inner cavity of the stirring tank body, and several obliquely parallel inoculation material injection nozzles are made on the tube body of the inoculation material injection pipe, and the inoculation material injection pipe is connected to the inoculation material conveying pipe; the lower part of the inner cavity of the raw material inoculation stirring tank body is connected to 1 to 3 axis parallel stirrers, and the upper part of the inner cavity of the stirring tank body is connected to 1-3 inoculation material injection pipes, and the 1-3 inoculation material injection pipes correspond to the 1-axis-3 axis parallel stirrers at the lower part.

[0013] When the utility model is used, according to the design requirements and actual needs, the multi-stage biogas fermentation device containing the single-ring and multi-layered ring partition wall fermentation tanks is connected to the set position of the continuous industrial biogas production fermentation process device of the high-concentration fermentation process, the PLC industrial controller is independently set or connected to the main controller of the continuous industrial biogas production biogas fermentation process device, and the air compression and suction system and the raw material conveying system are connected; the multi-layered outer ring pool partition wall fermentation tank is the outermost ring fermentation tank pool, that is, the first main pool, and the raw material inoculation stirring tank is used to add the fermentation straw from its fermentation raw material feeding hopper, etc. The raw materials for producing biogas are then transported from the positive and negative pressure tanks through the sludge suction and delivery pipes and the liquid biogas suction and delivery pipes, and the inoculated materials sucked from the outer annular fermentation tank are transported through the inoculated material delivery pipe to the raw material inoculation stirring tank. After the agitator is started to stir evenly, the inoculated material delivery pipe is transported to the first main pool of the outermost number. After the first main pool is filled with material, it overflows from the upper mouth of the partition wall to the second main pool; the second main pool flows from the through hole of the partition wall to the third main pool; the PLC industrial controller is used for full control, and the liquid biogas pipe control valve is opened to suck the liquid biogas through the liquid biogas suction and delivery pipe to maintain a stable and balanced operation of biogas fermentation.

[0014] Because the present invention adopts a fermentation tank body with a multi-stage fermentation tank having a single-layer or multi-layer outer annular pool partition wall, and is connected to the fermentation tank body with several raw material inoculation stirring tanks and several positive and negative pressure tanks, and the positive and negative pressure tanks are further connected with biogas residue and sludge suction and delivery pipes and biogas liquid suction and delivery pipes with control valves, it effectively solves the problem that the existing biogas fermentation process device is a single tank chamber single-stage fermentation process device and needs further research and development of multi-stage biogas fermentation process devices. The test results also show that it has the advantages of novel and practical structure, multi-stage fermentation, full utilization of raw materials, and easy use. It is especially suitable for the multi-stage biogas fermentation process device of continuous factory-scale biogas production of high-concentration biogas from straw and straw-feces mixed raw materials.

[0015] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures indicated in the description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1It is a schematic diagram of the specific structure of the biogas fermentation tank main body embodiment of the two-stage double fermentation tank pool of the utility model.

[0018] Figure 2 yes Figure 1 A top view of the specific structure of the embodiment.

[0019] Figure 3 yes Figure 1 The cross-sectional view along line AA in the embodiment is a specific structural diagram.

[0020] Figure 4 yes Figure 1 Schematic diagram of the specific structure of the biogas fermentation tank body of the third-level fermentation tank pool in the embodiment.

[0021] Figure 5 yes Figure 4 A top view of the specific structure of the embodiment.

[0022] Figure 6 yes Figure 1 A cross-sectional view of the specific structure along line BB in the embodiment.

[0023] Figure 7 yes Figure 1 Schematic diagram of the specific structure of the biogas fermentation tank body of the fifth-stage fermentation tank pool in Example.

[0024] Figure 8 yes Figure 7 A top view of the specific structure of the embodiment.

[0025] Figure 9 yes Figure 7 A cross-sectional view of the specific structure along line DD in the embodiment.

[0026] Figure 10 yes Figure 2 Schematic diagram of the enlarged cross-sectional structure of the raw material inoculation stirring tank in the direction C of the single stirring wing shaft connected to the biogas fermentation tank body in the embodiment.

[0027] Figure 11 yes Figure 10 A left-side structural schematic diagram of an embodiment.

[0028] Figure 12 is Figure 10 Example Schematic diagram of the structure of a raw material inoculation stirring tank equipped with three parallel stirring wing shafts on the basis of one stirring wing shaft.

[0029] Figure 13 yes Figure 12 EE sectional structural diagram.

[0030] The numbers in the attached drawings are: 1-annular partition wall of the central cylindrical pool; 2-the main body of the biogas fermentation tank; 3-the partition wall of the first outer annular pool; 4-the partition wall with positive and negative pressure tanks; 401-sludge suction and delivery pipe; 402-liquid suction and delivery pipe; 403-liquid pipe control valve; 404-sludge pipe control valve; 405-inoculation material delivery pipe; 406-pipe joint with three-way positive and negative pressure exchange control valve; 5-raw material inoculation stirring tank; 501-fermentation raw material feeding hopper; 502-fermentation inoculation raw material feeding pipe; 503-raw material feeding pipe control valve; 504-stirring tank main body; 505-agitator; 5 06-stirring motor; 507-inoculation material injection pipe; 508-inoculation material injection nozzle; 6-tank top mounted positive and negative pressure tanks; 601-auxiliary pool sludge suction and delivery pipe; 602-auxiliary pool biogas suction and delivery pipe; 603-auxiliary pool biogas liquid pipe control valve; 604-auxiliary pool sludge pipe control valve; 7-sludge discharge pipe; 8-partition wall through hole; 9-second layer outer circular ring pool partition wall; 10-third layer outer circular ring pool partition wall; 11-biogas output pipe; 12-biogas output control valve; 13-sludge discharge pipe; 14-sludge discharge pipe control valve; 15-PLC industrial controller; 16-electronically controlled pressure gauge.

[0031] A-Central cylindrical fermentation tank pool (auxiliary pool); B-Fourth outer annular fermentation tank pool (fourth main pool); C-Third outer annular fermentation tank pool (third main pool); D-Second outer annular fermentation tank pool (second main pool); E-First outer annular fermentation tank pool (first main pool). DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "top", "bottom", "front end", "rear end", "head", "tail", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0034] As attached Figure 1-Figure 3 、 Figure 10-11As shown, this embodiment includes: a biogas fermentation tank body 2, a raw material inoculation stirring tank 5, a PLC industrial controller 15, a partition wall mounted positive and negative pressure tank 4, and a tank top mounted positive and negative pressure tank 6. The biogas fermentation tank body 2 is a biogas fermentation tank body with a two-stage double fermentation tank pool composed of a fermentation tank body cavity equipped with a central cylindrical pool annular partition wall 1. The central cylindrical pool annular partition wall 1 is equipped with 4 evenly distributed partition wall mounted positive and negative pressure tanks 4, and the partition wall mounted positive and negative pressure tanks 4 are respectively equipped with plugs connected to the The sludge suction and delivery pipes 401 and the biogas liquid suction and delivery pipes 402 of the central cylindrical pool and the annular fermentation tank pool on both sides inside and outside the central cylindrical pool annular partition wall 1 are provided. The sludge suction and delivery pipes 401 are provided with a sludge pipe control valve 404 and the biogas liquid suction and delivery pipes 402 are provided with a biogas liquid pipe control valve 403. The top cover of the biogas fermentation tank body 2 is provided with a tank top positive and negative pressure tank 6 corresponding to the cylindrical fermentation tank pool in the annular partition wall 1 of the central cylindrical pool, i.e., the auxiliary tank. The tank body of the tank 6 is equipped with an auxiliary pool mud suction and delivery pipe 601 and an auxiliary pool liquid suction and delivery pipe 602 which are plugged into the central cylindrical fermentation tank pool, and an auxiliary pool mud pipe control valve 604 is installed on the auxiliary pool mud suction and delivery pipe 601 and an auxiliary pool liquid pipe control valve 603 is installed on the auxiliary pool liquid suction and delivery pipe 602. The tank top cover of the biogas fermentation tank body 2 corresponds to the outer annular fermentation tank pool and is equipped with two evenly distributed raw material inoculation stirring tanks 5. The raw material inoculation stirring tank 5 is equipped with a fermentation tank. The raw material feeding hopper 501 and the inoculation material conveying pipe 405, the other end of the inoculation material conveying pipe 405 are respectively connected to the positive and negative pressure tanks 4 installed on the partition wall and the positive and negative pressure tanks 6 installed on the tank top, the bottom of the raw material inoculation stirring tank 5 is connected to the fermentation inoculation raw material adding pipe 502, the fermentation inoculation raw material adding pipe 502 is inserted into the bottom of the outer annular fermentation tank pool, the fermentation inoculation raw material adding pipe 502 is installed with a raw material adding pipe control valve 503, the positive and negative pressure tanks 6 installed on the tank top are connected to the sludge discharge conveying pipe 7.

[0035] For example, see the attached Figure 1 、 Figure 10-11 The raw material inoculation stirring tank 5 described in this embodiment is a stirring tank main body 504 with a rectangular tank body on the upper part and a semicircular tank body on the lower part. A fermentation raw material feeding hopper 501 is installed on the top of the tank body of the stirring tank main body 504, and a fermentation inoculation raw material adding pipe 502 with a raw material adding pipe control valve 503 is installed at the bottom of the tank body. A stirrer 505 is installed at the lower part of the inner cavity of the stirring tank main body 504, and a stirring motor 506 is installed at the shaft head of the stirrer 505. An inoculation material injection pipe 507 is installed at the upper part of the inner cavity of the stirring tank main body 504. Several obliquely arranged in parallel inoculation material injection nozzles 508 are made on the tube body of the inoculation material injection pipe 507, and the inoculation material injection pipe 507 is connected to the inoculation material conveying pipe 405.

[0036] For details, see the attached Figure 12-13 In this embodiment, the lower part of the inner cavity of the stirring tank body 504 of the raw material inoculation stirring tank 5 is equipped with a three-axis parallel stirrer, and the inoculation material injection pipe 507 is three inoculation material injection pipes, and the three inoculation material injection pipes 507 correspond to the three-axis parallel stirrer.

[0037] Preferably, see the attached Figure 4-Figure 6 The biogas fermentation tank body 2 of this embodiment is a three-stage biogas fermentation tank body composed of a fermentation tank body wall with an inner cavity outside the circular partition wall 1 of the central cylindrical pool, and a two-layer circular partition wall. The first layer of the circular partition wall 3 of the biogas fermentation tank body 2 is connected with 8 evenly distributed partition wall-mounted positive and negative pressure tanks 4, and each partition wall-mounted positive and negative pressure tank 4 is respectively installed with two plugs connected to the fermentation tank pools on both sides of the circular partition wall. A sludge suction and delivery pipe 401 and two biogas liquid suction and delivery pipes 402 are installed, each of the sludge suction and delivery pipes 401 is equipped with a sludge pipe control valve 404 and each biogas liquid suction and delivery pipe 402 is equipped with a biogas liquid pipe control valve 403, the tank top cover of the biogas fermentation tank body 2 is equipped with a tank top mounted positive and negative pressure tank 6 corresponding to the cylindrical fermentation tank pool in the circular partition wall 1 of the central cylindrical pool, and the tank body of the tank top mounted positive and negative pressure tank 6 is equipped with a plug-in to the central cylindrical fermentation tank The auxiliary pool sludge suction and delivery pipe 601 and the auxiliary pool liquid suction and delivery pipe 602 are connected to the auxiliary pool sludge suction and delivery pipe 601, and the auxiliary pool sludge pipe control valve 604 and the auxiliary pool liquid suction and delivery pipe 602 are connected to the auxiliary pool liquid pipe control valve 603. The tank top cover of the biogas fermentation tank body 2 corresponds to the fermentation tank pool of the outermost ring and is equipped with 4 evenly distributed raw material inoculation stirring tanks 5. The inoculation material delivery pipe 405 of the raw material inoculation stirring tank 5 is connected to the positive and negative pressure on the partition wall. The tank 4 and the tank top are equipped with positive and negative pressure tanks 6, and the fermentation inoculation raw material adding pipe 502 installed at the bottom of the raw material inoculation stirring tank 5 is inserted into the bottom of the fermentation tank pool of the outermost ring; the tank body wall of the biogas fermentation tank body 2 described in this embodiment is an odd-numbered first-layer circular partition wall 3 inward, which is a solid wall, and the even-numbered second-layer circular partition wall, that is, the bottom of the central cylindrical pool circular partition wall 1, is provided with 7 evenly distributed circular partition wall through holes 8, and the spacing between the 7 evenly distributed partition wall through holes 8 is 2.3 meters.

[0038] Preferably, see the attached Figure 7-Figure 9The biogas fermentation tank body 2 of this embodiment is composed of a fermentation tank body wall inward to the inner cavity outside the central cylindrical pool circular partition wall 1, and there are three layers of circular partition walls composed of a central cylindrical fermentation tank pool, namely the auxiliary pool A, a fourth outer circular fermentation tank pool, namely the fourth main pool B, a third outer circular fermentation tank pool, namely the third main pool C, a second outer circular fermentation tank pool, namely the second main pool D, and a first outer circular fermentation tank pool, namely the first main pool E, a total of five fermentation tank pool cavities. The tank body wall of the biogas fermentation tank body 2 is connected to the first layer of circular partition wall 3 inward. 8 evenly spaced partition walls are equipped with positive and negative pressure tanks 4, and 6 evenly spaced partition walls are connected to the third annular partition wall 10. Each partition wall is equipped with a positive and negative pressure tank 4. The tank body is respectively installed with two sludge suction and delivery pipes 401 and two biogas liquid suction and delivery pipes 402 connected to the fermentation tank pools on both sides of the annular partition wall. A sludge pipe control valve 404 is installed on each sludge suction and delivery pipe 401 and a biogas liquid pipe control valve 403 is installed on each biogas liquid suction and delivery pipe 402. The tank top cover of the biogas fermentation tank body 2 corresponds to the central cylindrical pool ring. The cylindrical fermentation tank pool in the shaped partition wall 1 is equipped with a tank top mounted positive and negative pressure tank 6, and the tank body of the tank top mounted positive and negative pressure tank 6 is equipped with an auxiliary pool sludge suction and delivery pipe 601 and an auxiliary pool biogas liquid suction and delivery pipe 602 which are plugged into the central cylindrical fermentation tank pool, and the auxiliary pool sludge suction and delivery pipe 601 is equipped with an auxiliary pool sludge pipe control valve 604 and the auxiliary pool biogas liquid suction and delivery pipe 602 is equipped with an auxiliary pool biogas liquid pipe control valve 603. The tank top cover of the biogas fermentation tank body 2 corresponds to the fermentation tank pool of the outermost ring and is equipped with 4 evenly distributed raw material inoculation stirring tanks 5. The raw material inoculation The inoculation material conveying pipe 405 of the stirring tank 5 is connected to the positive and negative pressure tank 4 installed on the partition wall and the positive and negative pressure tank 6 installed on the tank top, and the fermentation inoculation raw material adding pipe 502 installed at the bottom of the raw material inoculation stirring tank 5 is inserted into the bottom of the fermentation tank pool E of the outermost ring; the tank body wall of the biogas fermentation tank body 2 is inward, and the bottom of the second-layer annular partition wall 9 and the fourth-layer annular partition wall, that is, the central cylindrical pool annular partition wall 1, are all provided with several evenly distributed partition wall through holes 8, and the first-layer annular partition wall 3 and the third-layer annular partition wall 10 are odd-layer annular partition walls, which are all solid walls.

[0039] For further details, please refer to the attached Figure 1-Figure 2 、 Figure 4-Figure 5 、 Figure 7-Figure 8 In this embodiment, the positive pressure forming end and the negative pressure forming end of the partition wall mounted positive and negative pressure tank 4 and the tank top mounted positive and negative pressure tank 6 are respectively connected to the air compression and suction systems of the air compressor and the negative pressure vacuum pump through a pipe joint 406 with a three-way positive and negative pressure exchange control valve.

[0040] For further preference, see the attached Figure 1-Figure 2 、 Figure 4-Figure 5 、 Figure 7-Figure 8 The PLC industrial controller 15 described in this embodiment is connected by electrical wires to and controls the electronically controlled pressure gauge 16 on the top of the biogas fermentation tank body 2, the biogas output control valve 12, the stirring power motor of the raw material inoculation stirring tank, the sludge discharge pipe control valve 14, the biogas liquid pipe control valve 403, the sludge pipe control valve 404 and the three-way positive and negative pressure exchange control valve. The PLC industrial controller 15 of this embodiment is a Siemens programmable industrial controller.

[0041] See attached Figure 1 、 Figure 4 、 Figure 7 In this embodiment, the bottom of the annular fermentation tank pool, the sludge suction and delivery pipe 401 and the pipe head of the auxiliary tank sludge suction and delivery pipe 601 are inserted into the sludge layer in the middle position of the outer annular fermentation tank pool.

[0042] The above is only one embodiment. Other technical features and technical solutions derived from adding components, equivalent replacements and local improvements by technicians in this field without creative work are all within the scope of protection of this utility model patent.

Claims

1. A multi-stage biogas fermentation device containing a single-ring and multi-layered ring partition wall fermentation tank, comprising a biogas fermentation tank body (2), a raw material inoculation stirring tank (5), and characterized in that: It also includes a PLC industrial controller (15), a partition wall mounted positive and negative pressure tank (4), and a tank top mounted positive and negative pressure tank (6). The biogas fermentation tank body (2) is a biogas fermentation tank body composed of a two-stage double fermentation tank pool with a central cylindrical pool annular partition wall (1) installed in the fermentation tank body cavity. The central cylindrical pool annular partition wall (1) is equipped with 2-12 evenly distributed partition wall mounted positive and negative pressure tanks (4), and the partition wall mounted positive and negative pressure tanks (4) are respectively connected to the inner and outer center of the central cylindrical pool annular partition wall (1). The cylindrical pool and the annular fermentation tank pool are provided with a biogas sludge suction and delivery pipe (401) and a biogas liquid suction and delivery pipe (402), wherein the biogas sludge suction and delivery pipe (401) is provided with a biogas sludge pipe control valve (404), and the biogas liquid suction and delivery pipe (402) is provided with a biogas liquid pipe control valve (403), and the tank top cover of the biogas fermentation tank body (2) is provided with 1-3 tank top-mounted positive and negative pressure tanks (6) corresponding to the cylindrical fermentation tank pool in the annular partition wall (1) of the central cylindrical pool, and the tank body of the tank top-mounted positive and negative pressure tanks (6) is provided with a valve plugged into the center. The cylindrical fermentation tank pool has an auxiliary pool sludge suction and delivery pipe (601) and an auxiliary pool liquid suction and delivery pipe (602), and the auxiliary pool sludge suction and delivery pipe (601) is equipped with an auxiliary pool sludge pipe control valve (604) and the auxiliary pool liquid suction and delivery pipe (602) is equipped with an auxiliary pool liquid pipe control valve (603). The tank top cover of the biogas fermentation tank body (2) is corresponding to the outer annular fermentation tank pool and is equipped with 2-6 evenly distributed raw material inoculation stirring tanks (5). The raw material inoculation stirring tank (5) is equipped with a fermentation raw material feeding hopper (501). ) and an inoculation material conveying pipe (405), the other end of the inoculation material conveying pipe (405) is respectively connected to the partition wall mounted positive and negative pressure tank (4) and the tank top mounted positive and negative pressure tank (6), the bottom of the raw material inoculation stirring tank (5) is connected to a fermentation inoculation raw material adding pipe (502), the fermentation inoculation raw material adding pipe (502) is plugged into the bottom of the outer annular fermentation tank pool, the fermentation inoculation raw material adding pipe (502) is installed with a raw material adding pipe control valve (503), and the tank top mounted positive and negative pressure tank (6) is connected to a sludge discharge conveying pipe (7).

2. The multi-stage biogas fermentation device comprising a single-ring and multi-layered ring partition wall fermentation tank according to claim 1, characterized in that: The biogas fermentation tank body (2) is a biogas fermentation tank body with a multi-stage multi-circular fermentation tank cavity composed of 1 to several layers of circular partition walls formed in the inner cavity outside the fermentation tank body wall to the central cylindrical pool circular partition wall (1). The biogas fermentation tank body (2) is provided with 2 to 12 evenly distributed partition wall-mounted positive and negative pressure tanks (4) on each of the odd-numbered layers of circular partition walls inwardly. Each partition wall-mounted positive and negative pressure tank (4) is respectively provided with a tank body connected to the inner and outer two sides of the circular partition wall. Each of the side fermentation tank pools has 1-2 biogas sludge suction and delivery pipes (401) and 1-2 biogas liquid suction and delivery pipes (402), and each biogas sludge suction and delivery pipe (401) is equipped with a biogas sludge pipe control valve (404) and each biogas liquid suction and delivery pipe (402) is equipped with a biogas liquid pipe control valve (403). The tank top cover of the biogas fermentation tank body (2) is equipped with 1-3 tank top positive and negative pressure tanks (6) corresponding to the cylindrical fermentation tank pool in the circular partition wall (1) of the central cylindrical pool. The tank body of the positive and negative pressure tank (6) is provided with a secondary pool sludge suction and delivery pipe (601) and a secondary pool sludge suction and delivery pipe (602) connected to the central cylindrical fermentation tank pool, and the secondary pool sludge suction and delivery pipe (601) is provided with a secondary pool sludge pipe control valve (604) and the secondary pool sludge suction and delivery pipe (602) is provided with a secondary pool sludge pipe control valve (603). The tank top cover of the biogas fermentation tank body (2) is provided with 2-6 evenly distributed raw material inoculation stirring tanks corresponding to the fermentation tank pool of the outermost ring. (5), the inoculation material conveying pipe (405) of the raw material inoculation stirring tank (5) is respectively connected to the positive and negative pressure tank (4) installed on the partition wall and the positive and negative pressure tank (6) installed on the tank top, and the fermentation inoculation raw material adding pipe (502) installed at the bottom of the raw material inoculation stirring tank (5) is inserted into the bottom of the fermentation tank pool of the outermost ring; the bottom of each even-numbered circular partition wall installed inwardly of the tank body wall of the biogas fermentation tank body (2) is provided with a plurality of evenly distributed partition wall through holes (8), and the odd-numbered circular partition walls are all solid walls.

3. The multi-stage biogas fermentation device comprising a single-ring and multi-layered ring partition wall fermentation tank according to claim 1, characterized in that: The bottom of each even-numbered layer of circular partition walls connected inwardly from the tank body wall of the biogas fermentation tank body (2) is provided with a plurality of evenly distributed partition wall through holes (8), which are any of circular through holes, elliptical through holes, arched through holes, and square through holes, and the spacing between the evenly distributed through holes is 2.0 to 3.3 meters.

4. The multi-stage biogas fermentation device comprising a single-ring and multi-layered ring partition wall fermentation tank according to claim 1, characterized in that: The positive pressure forming end and the negative pressure forming end of the partition wall mounted positive and negative pressure tank (4) and the tank top mounted positive and negative pressure tank (6) are respectively connected to the air compression and suction systems of an air compressor and a negative pressure suction pump via a pipe joint (406) with a three-way positive and negative pressure exchange control valve.

5. The multi-stage biogas fermentation device comprising a fermentation tank with single and multi-layer circular partition walls according to claim 1 or 4, characterized in that: The PLC industrial controller (15) is connected to the electric-controlled pressure gauge (16) on the top of the biogas fermentation tank body (2), the biogas output control valve (12), the stirring power motor of the raw material inoculation stirring tank, the biogas sludge discharge pipe control valve (14), the biogas liquid pipe control valve (403), the biogas sludge pipe control valve (404) and the three-way positive and negative pressure exchange control valve by electrical wires.

6. The multi-stage biogas fermentation device comprising a single-ring and multi-layered ring partition wall fermentation tank according to claim 1, characterized in that: The pipe heads of the biogas slurry suction and delivery pipe (402) and the auxiliary tank biogas slurry suction and delivery pipe (602) are inserted into the bottom of the outer annular fermentation tank, and the pipe heads of the biogas sludge suction and delivery pipe (401) and the auxiliary tank biogas sludge suction and delivery pipe (601) are inserted into the biogas sludge layer in the middle of the outer annular fermentation tank.

7. The multi-stage biogas fermentation device comprising single-ring and multi-layered ring partition wall fermentation tanks according to claim 1, characterized in that: The raw material inoculation stirring tank (5) is a stirring tank body (504) with a rectangular tank body at the top and a semicircular tank body at the bottom. A fermentation raw material feeding hopper (501) is installed at the top of the tank body of the stirring tank body (504), and a fermentation inoculation raw material adding pipe (502) with a raw material adding pipe control valve (503) is installed at the bottom of the tank body. A stirrer (505) is installed at the lower part of the inner cavity of the stirring tank body (504), and a stirring motor (506) is installed at the shaft head of the stirrer (505). An inoculation material injection pipe (507) is installed at the upper part of the inner cavity of the stirring tank body (504). The tube body of the inoculation material injection pipe (507) is provided with several obliquely parallel inoculation material injection nozzles (508). The inoculation material injection pipe (507) is connected to the inoculation material conveying pipe (405).

8. The multi-stage biogas fermentation device comprising a single-ring and multi-layered ring partition wall fermentation tank according to claim 7, characterized in that: The lower part of the inner cavity of the stirring tank body (504) of the raw material inoculation stirring tank (5) is equipped with a 1-axis to 3-axis parallel stirrer (505), and the upper part of the inner cavity of the stirring tank body (504) is equipped with 1-3 inoculation material injection pipes (507), and the 1-3 inoculation material injection pipes correspond to the lower 1-axis to 3-axis parallel stirrer.

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