A biogas tank for separating residue and liquid

Abstract

The present invention belongs to the technical field of biogas digesters, and specifically is a slag-liquid separation biogas digester, comprising a biogas digester body, a fermentation chamber, an air duct, a sealing cover, a liquid outlet pipe, a feeding device, a separating device and a rotating device. Plant straw and feces are conveyed into the fermentation chamber along the feeding device. A separating device is arranged inside the fermentation chamber. The interior of the separating device is used to hold the plant straw. When the plant straw inside the fermentation chamber is completely fermented, the rotating device is manually rotated, thereby effectively reducing the production and manufacturing cost of the biogas digester. The rotating device drives the separating device to rotate during the rotation process. The separating device begins to gradually reduce the diameter of the separating device during the rotation process until the diameter of the separating device is smaller than the diameter of a cleaning port. The separating device together with the fermented plant straw is pulled out along the cleaning port, thereby effectively improving the cleaning efficiency of the biogas digester and saving the physical strength of the staff involved in cleaning the biogas digester.

Description

Technical Field

[0001] The invention belongs to the technical field of biogas tanks, in particular to a slag-liquid separation biogas tank. Background Art

[0002] Energy is divided into renewable energy and non-renewable energy. As energy becomes increasingly scarce and environmental pollution becomes more and more serious, various renewable energy sources are increasingly being used in people's lives. Biogas is one of them. It produces combustible gas for people's daily use by fermenting raw materials such as plant straw and human and animal feces through microbial fermentation in an anaerobic environment.

[0003] In real life, the biogas digesters used in rural areas have a simple structure and are unable to separate the water and biogas residue in the digesters. Whenever the residue after fermentation inside the digester is cleaned, a lot of time and manual work is required, which wastes time and increases the workload of relevant staff. Large-scale biogas digesters are equipped with equipment for residue-liquid separation. The equipment has high working efficiency and can separate the residue and liquid thoroughly. However, the cost of using the equipment is high and it is not suitable for rural household biogas digesters. At this time, a biogas digester with low cost, high cleaning efficiency and the ability to achieve residue-liquid separation is needed. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art and solve the problems of improving the efficiency of manual cleaning of residues inside a biogas digester and incomplete separation of residues and liquids inside a biogas digester at a low cost, the present invention proposes a biogas digester with residue-liquid separation.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the slag-liquid separation biogas tank of the present invention comprises a biogas tank body, a fermentation chamber, an air guide pipe, a sealing cover and a liquid outlet pipe, the body is designed in a cylindrical structure, the fermentation chamber is provided inside the body, the liquid outlet pipe is fixedly connected on the right side wall of the body, a cleaning port is provided on the top of the body, the sealing cover is used to block the cleaning port, and the air guide pipe is fixedly connected on the top side wall of the body;

[0006] The body further comprises: a feeding device, the feeding device is located on the left side of the body, and the feeding device is used to transport materials used for fermentation into the fermentation chamber;

[0007] A separation device, the separation device is located inside the fermentation chamber, and the separation device is used to separate the liquid inside the fermentation chamber from the plant straw;

[0008] A rotating device is located in the middle of the sealing cover, and the rotating device drives the separation device to rotate and contract by rotating.

[0009] Preferably, the feeding device comprises: a feeding hopper, the feeding hopper is connected to the fermentation chamber through a first conveying pipe, the feeding hopper is used to convey plant straw into the fermentation chamber, and a protective cover is installed on the top of the feeding hopper;

[0010] A liquid inlet hopper, the liquid inlet hopper is located on the left side of the feed hopper, the liquid inlet hopper is connected to the fermentation chamber through a second delivery pipe, and the liquid inlet hopper is used to deliver liquid to the fermentation chamber;

[0011] A filter plate is fixedly connected to the inside of the liquid inlet hopper, and is used to prevent other solids from entering the fermentation chamber along the second conveying pipe.

[0012] Preferably, the separation device comprises: a collecting net, the collecting net is located inside the fermentation chamber, the mesh diameter of the collecting net 34 is smaller than the diameter of the fermented plant straw, and the collecting net is used to collect the fermented plant straw inside the fermentation chamber;

[0013] A circular plate, the circular plate is located at the bottom of the collecting net, the diameter of the circular plate is smaller than the diameter of the cleaning port, a folding plate 331 is hinged on the side of the circular plate, and the folding plate 331 is fixedly connected to the bottom of the collecting net;

[0014] A support column, the support column is rotatably connected to the middle part of the upper surface of the circular plate, and one end of the support column away from the circular plate is rotatably connected to a winding rod;

[0015] A telescopic member, wherein the telescopic member is fixedly connected to one end of the collecting net away from the folding plate 331, and the telescopic member is fixedly connected to the winding rod through uniformly arranged pull ropes.

[0016] Preferably, a support plate is fixedly connected to the side wall of the fermentation chamber, and the support plate is designed to be circular and used to support the telescopic member.

[0017] Preferably, the overall structure of the telescopic member is designed in a circular ring structure, and the telescopic member comprises: a first arc-shaped rod, the first arc-shaped rod is designed to be hollow, a plurality of the first arc-shaped rods are evenly arranged, and the pull rope is fixedly connected to the surface of the first arc-shaped rod;

[0018] a second arc-shaped rod, the second arc-shaped rod being located between two adjacent first arc-shaped rods, and the second arc-shaped rod being sealingly and slidably connected to the inside of the first arc-shaped rod;

[0019] The spring is designed as a ring structure and passes through the first arc rod and the second arc rod.

[0020] Preferably, the rotating device comprises: a rotating column, the rotating column is sealingly and rotatably connected to the middle part of the sealing cover, the rotating column passes through the sealing cover and extends to the space inside the fermentation chamber and is fixedly connected to the supporting column;

[0021] A rotating ring, the rotating ring is located above the sealing cover, and the rotating ring is fixedly connected to the rotating column;

[0022] A clamping piece, the clamping piece is located at the bottom of the rotating column, and the clamping piece is used to clamp the winding rod and drive the winding rod to rotate.

[0023] Preferably, a symmetrically designed stirring plate is fixedly connected to the side of the support column, and the stirring plate is used to stir the plant straw fermenting in the space inside the fermentation chamber.

[0024] Preferably, the clamping member comprises: a sliding rod, a sliding groove is provided inside the rotating column, the sliding rod is sealingly and slidingly connected inside the sliding groove, and a symmetrically designed arc groove is provided on the side of the rotating column below the sealing cover, and the arc groove is designed to communicate with the sliding groove;

[0025] A supporting rod, the supporting rod is hinged to the top of the sliding rod, and the supporting rod is used to support the sliding rod;

[0026] A card plate is slidably connected to the inside of the arc groove, the card plate is designed in a C-shaped structure, and the middle part of the upper surface of the card plate is fixedly connected to the bottom of the sliding rod.

[0027] Preferably, a baffle is slidably connected to the inner wall of the main body, a push-pull rod is fixedly connected to the middle of the upper surface of the baffle, the push-pull rod passes through the inner wall of the main body and extends to the space outside the main body, and the baffle is used to block the connection between the first delivery pipe and the inside of the main body.

[0028] Preferably, the surfaces of the above-mentioned components are coated with PTFE.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1. The slag-liquid separation biogas digester described in the present invention comprises a fermentation chamber, a feeding device, a separation device and a rotating device, wherein the fermentation raw materials are conveyed into the fermentation chamber along the feeding device, the interior of the separation device is used to hold plant straws, and when the plant straws in the fermentation chamber are completely fermented, the rotating device is manually rotated, thereby effectively reducing the production and manufacturing cost of the biogas digester, and the rotating device drives the separation device to rotate during the rotation process, and the separation device gradually reduces the diameter of the separation device during the rotation process, until the diameter of the separation device is smaller than the diameter of the cleaning port, and the separation device together with the fermented plant straws are pulled out along the cleaning port, thereby effectively improving the cleaning efficiency of the biogas digester and saving the physical strength of the staff involved in cleaning the biogas digester.

[0031] 2. The slag-liquid separation biogas tank described in the present invention is provided with a support column and a stirring plate. A symmetrically designed stirring plate is fixedly connected to the side of the support column. The support column synchronously drives the stirring plate to rotate during the rotation process. The stirring plate can stir the plant straw inside the fermentation chamber during the rotation process, so that the plant straw inside the fermentation chamber is fully in contact with the liquid inside the fermentation chamber, and the plant straw inside the fermentation chamber is fully fermented to generate biogas for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Figure 1 It is a front view of the present invention;

[0034] Figure 2 is a cross-sectional view of the present invention;

[0035] Figure 3 yes Figure 2 A partial enlarged view of the middle part;

[0036] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle;

[0037] In the figure: body 1, sealing cover 11, rotating column 111, rotating ring 112, supporting rod 113, arc groove 114, sliding rod 115, clamping plate 116, liquid outlet pipe 12, air guide pipe 13, feed hopper 2, protective cover 21, first conveying pipe 22, liquid inlet hopper 23, filter plate 24, second conveying pipe 25, fermentation chamber 3, first arc rod 31, second arc rod 32, circular plate 33, folding plate 331, collecting net 34, pull rope 35, support column 36, winding plate 361, stirring plate 362, support plate 37, baffle 4, push-pull rod 41. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] like Figures 1 to 4 As shown, a slag-liquid separation biogas tank of the present invention comprises a biogas tank body 1, a fermentation chamber 3, an air guide pipe 13, a sealing cover 11 and a liquid outlet pipe 12. The body 1 is designed in a cylindrical structure, the fermentation chamber 3 is provided inside the body 1, the liquid outlet pipe 12 is fixedly connected on the right side wall of the body 1, a cleaning port is provided on the top of the body 1, the sealing cover 11 is used to block the cleaning port, and the air guide pipe 13 is fixedly connected on the top side wall of the body 1;

[0040] The body 1 further comprises: a feeding device, which is located on the left side of the body 1 and is used to transport materials used for fermentation into the fermentation chamber 3;

[0041] A separation device, the separation device is located inside the fermentation chamber 3, and the separation device is used to separate the liquid inside the fermentation chamber 3 from the plant straw;

[0042] A rotating device, the rotating device is located in the middle of the sealing cover 11, and the rotating device drives the separation device to rotate and retract by rotating;

[0043] During operation, the biogas digester used in rural areas in real life has a simple structure and cannot separate the water and biogas residue in the digester. Whenever the plant straw residue after fermentation in the biogas digester is cleaned, a lot of time and manual work are required to clean it, which wastes time and increases the workload of relevant staff. In order to save the cleaning time and manpower of the biogas digester, a feeding device is connected to the left side of the main body 1, and the plant straw and liquid fermentation raw materials are conveyed to the fermentation chamber 3 along the feeding device. The plant straw and the liquid fermentation raw materials are used in combination with a fermentation agent to perform a fermentation reaction in the fermentation chamber 3 to generate biogas. Since the mass of biogas is less than that of air, the generated biogas moves upward to the top of the fermentation chamber 3, and an air duct 13 is connected to the top side wall of the main body 1, and the biogas is discharged along the air duct 13 for use by users. A sealing cover 11 is installed at the cleaning port on the top of the main body 1. By using the sealing cover 11 to seal the cleaning port, the fermentation chamber 3 can be effectively avoided. The internal biogas is discharged along the cleaning port. Since a separation device is provided inside the fermentation chamber 3, the separation device is used to hold plant straw. When the plant straw inside the fermentation chamber 3 is completely fermented, the fermented plant straw needs to be cleaned to the space outside the main body 1. A liquid outlet pipe 12 is connected to the right side wall of the main body 1, and the liquid outlet pipe 12 is opened to discharge the liquid inside the fermentation chamber 3 along the liquid outlet pipe 12, so that the liquid level inside the fermentation chamber 3 is lower than the connection point between the liquid outlet pipe 12 and the main body 1. Then, by using a rotating device, the rotating device is manually rotated, and the rotating device drives the separation device to rotate during the rotation process. The separation device begins to gradually reduce the diameter of the separation device during the rotation process until the diameter of the separation device is smaller than the diameter of the cleaning port. The separation device together with the fermented plant straw is pulled out along the cleaning port, thereby effectively improving the cleaning efficiency of the biogas tank and saving the physical strength of the staff involved in cleaning the biogas tank.

[0044] As an embodiment of the present invention, the feeding device includes: a feeding hopper 2, the feeding hopper 2 is connected to the fermentation chamber 3 through a first conveying pipe 22, the feeding hopper 2 is used to convey plant straw into the fermentation chamber 3, and a protective cover 21 is installed on the top of the feeding hopper 2;

[0045] A liquid inlet hopper 23, the liquid inlet hopper 23 is located on the left side of the feed hopper 2, the liquid inlet hopper 23 is connected to the fermentation chamber 3 through a second delivery pipe 25, and the liquid inlet hopper 23 is used to deliver liquid to the fermentation chamber 3;

[0046] A filter plate 24, wherein the filter plate 24 is fixedly connected to the inside of the liquid inlet hopper 23, and the filter plate 24 is used to prevent other solids from entering the fermentation chamber 3 along the second delivery pipe 25;

[0047] During operation, since a feed hopper 2 is installed on the left side of the main body 1, when it is necessary to put unfermented plant straw into the fermentation chamber 3, the unfermented plant straw is put into the feed hopper 2, and the feed hopper 2 and the fermentation chamber 3 are connected through the first conveying pipe 22, so that the plant straw inside the feed hopper 2 enters the space inside the fermentation chamber 3 to react and generate new biogas for users to use. A protective cover 21 is installed on the top of the feed hopper 2. When new plant straw needs to be put in, the protective cover 21 is opened to put new plant straw into the feed hopper 2. When no plant straw is put in, the protective cover 21 blocks the feed hopper 2, thereby effectively preventing the biogas inside the fermentation chamber 3 from flowing out along the feed hopper 2. A liquid inlet hopper 23 is installed on the left side of the hopper 2, and the liquid inlet hopper 23 is connected to the fermentation chamber 3 through a second delivery pipe 25, so that the liquid inlet hopper 23 is always in an open state. The liquid fermentation raw materials can continuously enter the space inside the fermentation chamber 3 along the second delivery pipe 25, and react with the plant straw to generate biogas for users. By fixing a filter plate 24 inside the liquid inlet hopper 23, it can effectively prevent plant straw and other solids from entering the space inside the fermentation chamber 3 through the liquid inlet hopper 23. Since the connection point between the second delivery pipe 25 and the fermentation chamber 3 is located below the liquid level height inside the fermentation chamber 3, it can effectively prevent the biogas inside the fermentation chamber 3 from flowing out along the second delivery pipe 25 to pollute the surrounding environment.

[0048] As an embodiment of the present invention, the separation device includes: a collecting net 34, the collecting net 34 is located inside the fermentation chamber 3, the net opening diameter of the collecting net 34 is smaller than the diameter of the fermented plant straw, and the collecting net 34 is used to collect the fermented plant straw inside the fermentation chamber 3;

[0049] A circular plate 33, the circular plate 33 is located at the bottom of the collecting net 34, the diameter of the circular plate 33 is smaller than the diameter of the cleaning port, a folding plate 331 is hinged on the side of the circular plate 33, and the folding plate 331 is fixedly connected to the bottom of the collecting net 34;

[0050] A support column 36, wherein the support column 36 is rotatably connected to the middle portion of the upper surface of the circular plate 33, and an end of the support column 36 away from the circular plate 33 is rotatably connected to a winding rod 361;

[0051] A telescopic member, the telescopic member is fixedly connected to one end of the collecting net 34 away from the folding plate 331, and the telescopic member is fixedly connected to the winding rod 361 through uniformly arranged pull ropes 35;

[0052] During operation, a collecting net 34 is installed inside the fermentation chamber 3. In the initial state, the collecting net 34 is located below the connection between the first conveying pipe 22 and the main body 1, so that the plant straw entering the space in the fermentation chamber 3 along the second conveying pipe 25 directly falls into the space in the collecting net 34. After the plant straw is completely fermented in the fermentation chamber 3, it is helpful to separate the residue and liquid in the fermentation chamber 3. A circular plate 33 is installed at the bottom of the collecting net 34, and the side of the circular plate 33 is hinged with evenly arranged folding plates 331. The folding plates 331 are used to prop up the bottom of the collecting net 34 to facilitate the unfolding of the collecting net 34, so that the collecting net 34 is close to the side wall of the fermentation chamber 3, thereby expanding the volume of the collecting net 34. A supporting column 36 is rotatably connected to the middle part of the upper surface of the circular plate 33, and a winding rod 361 is rotatably connected to the support column 36 away from the circular plate 33. The end of the net 34 away from the folding plate 331 is fixedly connected with a telescopic part, and both ends of the winding rod 361 are fixedly connected with evenly arranged pull ropes 35. The rotating device drives the winding rod 361 to rotate during the rotation process, and the winding rod 361 drives the pull rope 35 to rotate during the rotation process. The pull rope 35 continues to rotate, causing the pull ropes 35 at both ends of the winding rod 361 to be entangled. The entanglement of the pull rope 35 causes the telescopic part to begin to shrink. During the telescopic process, the telescopic part drives the folding plate 331 to gather toward the direction of the support column 36, thereby reducing the diameter of the bottom of the collecting net 34, until the diameter of the telescopic part shrinks to be smaller than the diameter of the cleaning port, and then the collecting net 34, the circular plate 33, the folding plate 331 and the support column 36 are pulled out to the space outside the main body 1, thereby effectively improving the efficiency of slag-liquid separation in the biogas tank, and at the same time saving the time for cleaning the biogas tank and the physical strength of the relevant staff.

[0053] As an embodiment of the present invention, a support plate 37 is fixedly connected to the side wall of the fermentation chamber 3, and the support plate 37 is designed in a circular ring shape, and the support plate 37 is used to support the telescopic member;

[0054] During operation, a support plate 37 is fixedly connected to the side wall of the fermentation chamber 3, so that the telescopic part can be placed on the upper surface of the support plate 37 after being unfolded, which is convenient for the expansion and contraction of the collecting net 34. At the same time, through the coordinated use of the support plate 37 and the collecting net 34, it can also effectively prevent the plant straw transported along the first conveying pipe 22 from entering the outer space of the collecting net 34, thereby further improving the slag-liquid separation effect of the biogas tank.

[0055] As an embodiment of the present invention, the overall structure of the telescopic member is designed in a circular ring structure, and the telescopic member includes: a first arc rod 31, the first arc rod 31 is an arc-shaped hollow design, a plurality of the first arc rods 31 are evenly arranged, and the pull rope 35 is fixedly connected to the surface of the first arc rod 31;

[0056] A second arc-shaped rod 32, wherein the second arc-shaped rod 32 is located between two adjacent first arc-shaped rods 31, and the second arc-shaped rod 32 is sealingly and slidably connected to the inside of the first arc-shaped rod 31;

[0057] A spring, the spring is designed as a ring structure, and the spring passes through the first arc rod 31 and the second arc rod 32;

[0058] During operation, since the first arc rod 31 is an arc-shaped hollow design, the first arc rod 31 is slidably connected with the second arc rod 32 inside. By using springs to penetrate the first arc rod 31 and the second arc rod 32 respectively, the first arc rod 31 and the second arc rod 32 are expanded toward the circumferential side by the elastic force of the internal springs, so that the telescopic member is located above the support plate 37, which is convenient for the collection net 34 to be expanded to hold the plant straw. The surface of the first arc rod 31 is fixedly connected with uniformly arranged pull ropes 35. The winding plate 361 drives the pull ropes 35 at both ends to be wound during the rotation process. The pull ropes 35 During the winding process, the first arc rod 31 is driven to shrink toward the direction of the support column 36. During the shrinkage process, the first arc rod 31 drives the folding plate 331 to gather toward the direction of the support column 36 through the collecting net 34, thereby reducing the diameter of the bottom of the collecting net 34, until the diameter of the telescopic part shrinks to be smaller than the diameter of the cleaning port, and then the collecting net 34, the circular plate 33, the folding plate 331 and the support column 36 are pulled out to the space outside the main body 1, thereby effectively improving the efficiency of slag-liquid separation in the biogas tank, and at the same time saving the time for cleaning the biogas tank and the physical strength of the relevant staff.

[0059] As an embodiment of the present invention, the rotating device includes: a rotating column 111, the rotating column 111 is sealingly and rotatably connected to the middle part of the sealing cover 11, the rotating column 111 passes through the sealing cover 11 and extends to the space inside the fermentation chamber 3 and is fixedly connected to the support column 36;

[0060] A rotating ring 112, the rotating ring 112 is located above the sealing cover 11, and the rotating ring 112 is fixedly connected to the rotating column 111;

[0061] A clamping member, the clamping member is located at the bottom of the rotating column 111, and the clamping member is used to clamp the winding rod 361 and drive the winding rod 361 to rotate;

[0062] During operation, since the middle part of the sealing cover 11 is sealed and rotatably connected with the rotating column 111, the surface of the rotating column 111 is fixedly connected with the rotating ring 112, the rotating ring 112 is manually rotated so that the rotating column 111 is driven by the rotating ring 112 to rotate, which is convenient for the rotating column 111 to rotate. Since a clamping piece is fixedly connected to the bottom of the rotating column 111, the rotating column 111 drives the clamping piece to rotate during the rotation process, and the clamping piece contacts the winding rod 361 during the rotation process, forcing the winding rod 361 to rotate synchronously, and the rotation of the winding rod 361 drives the pull ropes 35 at both ends of the winding rod 361 to be wound. During the winding process, the pull rope 35 drives the first arc rod 31 to shrink toward the direction of the support column 36. During the shrinkage process, the first arc rod 31 drives the folding plate 331 to gather toward the direction of the support column 36 through the collecting net 34, thereby reducing the diameter of the bottom of the collecting net 34 until the diameter of the telescopic part shrinks to be smaller than the diameter of the cleaning port, and then the collecting net 34, the circular plate 33, the folding plate 331 and the support column 36 are pulled out to the space outside the main body 1, thereby effectively improving the efficiency of the slag-liquid separation of the biogas tank, and at the same time saving the time for cleaning the biogas tank and the physical strength of the relevant staff.

[0063] As an embodiment of the present invention, a symmetrically designed stirring plate 362 is fixedly connected to the side of the support column 36, and the stirring plate 362 is used to stir the plant straw fermenting in the space of the fermentation chamber 3;

[0064] During operation, since the rotating column 111 passes through the sealing cover 11 and is fixedly connected to the support column 36, the support column 36 is driven to rotate synchronously during the manual rotation of the rotating column 111. By fixing a symmetrically designed stirring plate 362 on the side of the support column 36, the support column 36 synchronously drives the stirring plate 362 to rotate during the rotation. The stirring plate 362 can stir the plant straw inside the fermentation chamber 3 during the rotation, so that the plant straw inside the fermentation chamber 3 is fully in contact with the liquid inside the fermentation chamber 3, and the plant straw inside the fermentation chamber 3 is simultaneously fermented to generate biogas for users.

[0065] As an embodiment of the present invention, the clamping member includes: a sliding rod 115, a sliding groove is provided inside the rotating column 111, the sliding rod 115 is sealingly slidably connected inside the sliding groove, and a symmetrically designed arc groove 114 is provided on the side of the rotating column 111 below the sealing cover 11, and the arc groove 114 is designed to be connected to the sliding groove;

[0066] A supporting rod 113, wherein the supporting rod 113 is hinged to the top of the sliding rod 115, and the supporting rod 113 is used to support the sliding rod 115;

[0067] A card plate 116, wherein the card plate 116 is slidably connected to the inside of the arc groove 114, the card plate 116 is designed in a C-shaped structure, and the middle of the upper surface of the card plate 116 is fixedly connected to the bottom of the sliding rod 115;

[0068] During operation, since a slide groove is provided inside the rotating column 111, a sliding rod 115 is slidably connected inside the slide groove. A symmetrically designed arc groove 114 is provided on the side of the rotating column 111 below the sealing cover 11, so that the clamping plate 116 can slide inside the arc groove 114. The middle part of the upper surface of the clamping plate 116 is fixedly connected to the bottom of the sliding rod 115, so that the sliding rod 115 drives the clamping plate 116 to slide in the arc groove 114 during the movement. When it is necessary to clean the plant straw inside the fermentation chamber 3, the sliding rod 115 is pressed downward so that the height of the clamping plate 116 is less than the height of the winding rod 361, so that the rotating column 111 synchronously drives the clamping plate 116 to rotate during the rotation, and the clamping plate 116 contacts the winding rod 361 during the rotation, forcing the winding rod 361 to rotate. When the card plate 116 is engaged with the winding rod 361 to force the winding rod 361 to rotate, when the stirring plate 362 is needed to stir the plant straw and the liquid in the fermentation chamber 3 to fully mix and ferment, the sliding rod 115 is pulled upward, and the card plate 116 is driven to move upward synchronously during the upward movement of the sliding rod 115, until the position height of the card plate 116 is higher than the height of the winding rod 361, the supporting rod 113 at the top of the sliding rod 115 is used to support the sliding rod 115 above the rotating column 111, and then the supporting column 36 is driven to rotate by the rotating column 111. During the rotation process, the supporting column 36 synchronously drives the stirring plate 362 to rotate, so that the plant straw in the fermentation chamber 3 is fully in contact with the liquid and fermented. At the same time, it can effectively prevent the rotating column 111 from driving the winding rod 361 to rotate during the rotation process.

[0069] As an embodiment of the present invention, a baffle 4 is slidably connected to the inner wall of the body 1, and a push-pull rod 41 is fixedly connected to the middle of the upper surface of the baffle 4. The push-pull rod 41 passes through the inner wall of the body 1 and extends to the outer space of the body 1. The baffle 4 is used to block the connection between the first delivery pipe 22 and the inside of the body 1;

[0070] During operation, in order to reduce the outflow of biogas to the space outside the fermentation chamber 3, a baffle 4 is slidably connected to the inner wall of the main body 1, and a push-pull rod 41 is fixedly connected to the middle of the upper surface of the baffle 4. When new plant straw needs to be added to the space inside the fermentation chamber 3, the push-pull rod 41 is pushed downward, so that the push-pull rod 41 drives the baffle 4 to move downward to block the connection between the main body 1 and the first conveying pipe 22, and then the protective cover 21 of the feed hopper 2 is opened, and plant straw is added to the inside of the feed hopper 2. After the plant straw fills the inner wall of the feed hopper 2, the push-pull rod 41 is pulled upward. The push-pull rod 41 drives the baffle 4 to move upward, opens the connection between the main body 1 and the first conveying pipe 22, and allows the plant straw in the feed hopper 2 to be transferred to the space inside the fermentation chamber 3, thereby effectively reducing the leakage of biogas inside the fermentation chamber 3 to the space outside the fermentation chamber 3.

[0071] As an embodiment of the present invention, the surfaces of the above-mentioned components are coated with PTFE;

[0072] During operation, by coating the surfaces of all components with PTFE and utilizing the good corrosion resistance of PTFE, the corrosion of the components by the liquid inside the fermentation chamber 3 can be reduced, thereby effectively improving the corrosion resistance of the components and simultaneously extending the service life of the components.

[0073] The specific operation process is as follows:

[0074] The plant straw and the liquid fermentation raw material are conveyed into the fermentation chamber 3 along the feeding device, and the plant straw and the liquid fermentation raw material are used in combination with the leavening agent to undergo a fermentation reaction inside the fermentation chamber 3 to generate biogas, and the biogas is discharged along the air duct 13 for use by the user. The cleaning port is sealed with a sealing cover 11, and the liquid outlet pipe 12 is opened to allow the liquid inside the fermentation chamber 3 to be discharged along the liquid outlet pipe 12, so that the liquid level inside the fermentation chamber 3 is lower than the connection point between the liquid outlet pipe 12 and the main body 1, and then the rotating device is manually rotated by using the rotating device, and the rotating device drives the separating device to rotate during the rotation process, and the separating device begins to gradually reduce the diameter of the separating device during the rotation process, until the diameter of the separating device is smaller than the diameter of the cleaning port, and the separating device together with the fermented plant straw is pulled out along the cleaning port.

[0075] The plant straw inside the feed hopper 2 enters the space inside the fermentation chamber 3 to react and generate new biogas for users to use. A protective cover 21 is installed on the top of the feed hopper 2. When new plant straw needs to be added, the protective cover 21 is opened to add new plant straw to the inside of the feed hopper 2. When no plant straw is added, the protective cover 21 blocks the feed hopper 2, thereby effectively preventing the biogas inside the fermentation chamber 3 from flowing out along the feed hopper 2. A liquid inlet hopper 23 is installed on the left side of the feed hopper 2. The liquid inlet hopper 23 is connected to the fermentation chamber 3 through a second conveying pipe 25. The liquid fermentation raw materials are added to the liquid inlet hopper 23 and enter the space inside the fermentation chamber 3 along the second conveying pipe 25, and react with the plant straw to generate biogas for users to use. A filter plate 24 is fixedly connected to the inside of the feed hopper 2, and the connection between the second conveying pipe 25 and the fermentation chamber 3 is located below the liquid level height inside the fermentation chamber 3.

[0076] A support column 36 is rotatably connected to the middle part of the upper surface of the circular plate 33, and a winding rod 361 is rotatably connected to the end of the support column 36 away from the circular plate 33. A telescopic member is fixedly connected to the end of the collecting net 34 away from the folding plate 331, and evenly arranged pull ropes 35 are fixedly connected to both ends of the winding rod 361. The rotating device drives the winding rod 361 to rotate during the rotation process, and the winding rod 361 drives the pull rope 35 to rotate during the rotation process. The continuous rotation of the pull rope 35 causes the pull rope 35 at both ends of the winding rod 361 to be entangled. The entanglement of the pull rope 35 causes the telescopic member to begin to shrink. During the process of extension and retraction, the telescopic member drives the folding plate 331 to gather in the direction of the support column 36, thereby reducing the diameter of the bottom of the collecting net 34, until the diameter of the telescopic member shrinks to be smaller than the diameter of the cleaning port, and then the collecting net 34, the circular plate 33, the folding plate 331 and the support column 36 are pulled out to the space outside the main body 1.

[0077] By fixing the support plate 37 on the side wall of the fermentation chamber 3 , the telescopic member can be placed on the upper surface of the support plate 37 after being unfolded, so as to facilitate the unfolding and contraction of the collecting net 34 .

[0078] The first arc rod 31 and the second arc rod 32 are expanded toward the circumferential side by the elastic force of the internal spring, so that the telescopic part is located above the support plate 37, which is convenient for the collection net 34 to be expanded to hold the plant straw. The winding plate 361 drives the pull ropes 35 at both ends to wind during the rotation process. The pull ropes 35 drive the first arc rod 31 to shrink toward the direction of the support column 36 during the winding process. During the shrinkage process, the first arc rod 31 drives the folding plate 331 to gather toward the direction of the support column 36 through the collection net 34, thereby reducing the diameter of the bottom of the collection net 34, until the diameter of the telescopic part shrinks to be smaller than the diameter of the cleaning port, and then the collection net 34, the circular plate 33, the folding plate 331 and the support column 36 are pulled out to the space outside the main body 1.

[0079] By fixing a clamping piece at the bottom of the rotating column 111, the rotating column 111 drives the clamping piece to rotate during the rotation process, and the clamping piece contacts the winding rod 361 during the rotation process, forcing the winding rod 361 to rotate synchronously, and the rotation of the winding rod 361 drives the pull ropes 35 at both ends of the winding rod 361 to wind around, and the pull ropes 35 drive the first arc rod 31 to shrink toward the direction of the support column 36 during the winding process, and the first arc rod 31 drives the folding plate 331 to gather toward the direction of the support column 36 through the collecting net 34 during the shrinkage process, thereby reducing the diameter of the bottom of the collecting net 34, until the diameter of the telescopic piece shrinks to be smaller than the diameter of the cleaning port, and then the collecting net 34, the circular plate 33, the folding plate 331 and the support column 36 are pulled out to the space outside the main body 1.

[0080] The support column 36 synchronously drives the stirring plate 362 to rotate during the rotation process. The stirring plate 362 can stir the plant straw inside the fermentation chamber 3 during the rotation process, so that the plant straw inside the fermentation chamber 3 is fully in contact with the liquid inside the fermentation chamber 3.

[0081] The sliding rod 115 is pressed downward so that the height of the card plate 116 is less than the height of the winding rod 361, so that the rotating column 111 synchronously drives the card plate 116 to rotate during the rotation process. The card plate 116 contacts the winding rod 361 during the rotation process, forcing the winding rod 361 to rotate. The card plate 116 engages with the winding rod 361 to force the winding rod 361 to rotate. When the stirring plate 362 is needed to stir the plant straw and liquid in the fermentation chamber 3 to fully mix and ferment, the sliding rod 115 is pulled upward. During the upward movement of the sliding rod 115, the card plate 116 is driven to move upward synchronously until the position height of the card plate 116 is higher than the height of the winding rod 361. The supporting rod 113 at the top of the sliding rod 115 is used to support the sliding rod 115 above the rotating column 111, and then the supporting column 36 is driven to rotate through the rotating column 111. The supporting column 36 synchronously drives the stirring plate 362 to rotate during the rotation process.

[0082] Push the push-pull rod 41 downward so that the push-pull rod 41 drives the baffle 4 to move downward to block the connection between the main body 1 and the first conveying pipe 22, then open the protective cover 21 of the feed hopper 2, put plant straw into the feed hopper 2, and after the plant straw fills the inner wall of the feed hopper 2, pull the push-pull rod 41 upward, the push-pull rod 41 drives the baffle 4 to move upward, open the connection between the main body 1 and the first conveying pipe 22, so that the plant straw in the feed hopper 2 is transferred to the space inside the fermentation chamber 3.

[0083] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A slag-liquid separation biogas tank, comprising a biogas tank body (1), a fermentation chamber (3), an air duct (13), a sealing cover (11) and a liquid outlet pipe (12), wherein the body (1) is designed in a cylindrical structure, the fermentation chamber (3) is provided inside the body (1), the liquid outlet pipe (12) is fixedly connected on the right side wall of the body (1), a cleaning port is provided on the top of the body (1), the sealing cover (11) is used to block the cleaning port, and the air duct (13) is fixedly connected on the top side wall of the body (1), characterized in that: The body (1) further comprises: a feeding device, the feeding device being located on the left side of the body (1) and being used to transport materials used for fermentation into the fermentation chamber (3); a separation device, the separation device being located inside the fermentation chamber (3) and being used to separate the liquid inside the fermentation chamber (3) from the plant stalks; and a rotating device, the rotating device being located in the middle of the sealing cover (11) and driving the separation device to rotate and contract by rotating. The separation device comprises: a collecting net (34), the collecting net (34) being located inside the fermentation chamber (3), the net opening diameter of the collecting net (34) being smaller than the diameter of the fermented plant straw, and the collecting net (34) being used to collect the fermented plant straw inside the fermentation chamber (3); a circular plate (33), the circular plate (33) being located at the bottom of the collecting net (34), the diameter of the circular plate (33) being smaller than the diameter of the cleaning opening, the side of the circular plate (33) being hinged with a folding plate (331), The folding plate (331) is fixedly connected to the bottom of the collecting net (34); a support column (36), the support column (36) is rotatably connected to the middle part of the upper surface of the circular plate (33), and the end of the support column (36) away from the circular plate (33) is rotatably connected to a winding rod (361); a telescopic member, the telescopic member is fixedly connected to the end of the collecting net (34) away from the folding plate (331), and the telescopic member is fixedly connected to the winding rod (361) by evenly arranged pull ropes (35); A support plate (37) is fixedly connected to the side wall of the fermentation chamber (3), and the support plate (37) is designed to be annular, and the support plate (37) is used to support the telescopic member; The overall structure of the telescopic member is designed in a circular ring structure, and the telescopic member comprises: a first arc-shaped rod (31), the first arc-shaped rod (31) is designed as an arc-shaped hollow rod, a plurality of the first arc-shaped rods (31) are evenly arranged, and the pull rope (35) is fixedly connected to the surface of the first arc-shaped rod (31); a second arc-shaped rod (32), the second arc-shaped rod (32) is located between two adjacent first arc-shaped rods (31), and the second arc-shaped rod (32) is sealed and slidably connected to the inside of the first arc-shaped rod (31); a spring, the spring is designed in a ring structure, and the spring passes through the first arc-shaped rod (31) and the second arc-shaped rod (32); The rotating device comprises: a rotating column (111), the rotating column (111) is sealingly and rotatably connected to the middle part of the sealing cover (11), the rotating column (111) penetrates the sealing cover (11) and extends to the space inside the fermentation chamber (3) and is fixedly connected to the supporting column (36); a rotating ring (112), the rotating ring (112) is located above the sealing cover (11), the rotating ring (112) is fixedly connected to the rotating column (111); a clamping member, the clamping member is located at the bottom of the rotating column (111), and the clamping member is used to clamp the winding rod (361) and drive the winding rod (361) to rotate; A symmetrically designed stirring plate (362) is fixedly connected to the side of the support column (36), and the stirring plate (362) is used to stir the plant straw fermenting in the space inside the fermentation chamber (3); The clamping member comprises: a sliding rod (115), a sliding groove is provided inside the rotating column (111), the sliding rod (115) is sealingly and slidably connected inside the sliding groove, and a symmetrically designed arc groove (114) is provided on the side of the rotating column (111) below the sealing cover (11), and the arc groove (114) is designed to be connected to the sliding groove; a supporting rod (113), the supporting rod (113) is hinged to the top of the sliding rod (115), and the supporting rod (113) is used to support the sliding rod (115); a card plate (116), the card plate (116) is slidably connected to the inside of the arc groove (114), the card plate (116) is designed in a C-shaped structure, and the middle part of the upper surface of the card plate (116) is fixedly connected to the bottom of the sliding rod (115).

2. A slag-liquid separation biogas tank according to claim 1, characterized in that: The feeding device comprises: a feeding hopper (2), the feeding hopper (2) being connected to the fermentation chamber (3) via a first conveying pipe (22), the feeding hopper (2) being used to convey plant straw into the fermentation chamber (3), and a protective cover (21) being installed on the top of the feeding hopper (2); a liquid feeding hopper (23), the liquid feeding hopper (23) being located on the left side of the feeding hopper (2), the liquid feeding hopper (23) being connected to the fermentation chamber (3) via a second conveying pipe (25), the liquid feeding hopper (23) being used to convey liquid into the fermentation chamber (3); and a filter plate (24), the filter plate (24) being fixedly connected to the inside of the liquid feeding hopper (23), the filter plate (24) being used to prevent other solids from entering the fermentation chamber (3) along the second conveying pipe (25).

3. A slag-liquid separation biogas tank according to claim 2, characterized in that: A baffle (4) is slidably connected to the inner wall of the main body (1), and a push-pull rod (41) is fixedly connected to the middle of the upper surface of the baffle (4). The push-pull rod (41) passes through the inner wall of the main body (1) and extends to the outer space of the main body (1). The baffle (4) is used to block the connection between the first conveying pipe (22) and the inside of the main body (1).

4. A slag-liquid separation biogas digester according to any one of claims 1-2, characterized in that: The surfaces of the above-mentioned parts are coated with PTFE.

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