Fermentation device dedicated to straw biogas project and use method thereof

Abstract

The invention discloses a fermentation device and method dedicated to a straw biogas project, and relates to the technical field of straw fermentation, comprising a bottom plate, wherein two support seats are fixedly connected to one side of the upper end surface of the bottom plate, a heat-insulating fermentation tank is rotatably connected between the two support seats, a biogas collecting port is arranged at the upper end of the heat-insulating fermentation tank, and a heating system for heating is also arranged inside the heat-insulating fermentation tank; the invention can crush the input straw into small pieces by means of a crushing component, thereby facilitating the contact between the fermentation bacteria agent and the straw, and improving the fermentation efficiency; at the same time, the processing component can hammer and stir the straw inside the heat-insulating fermentation tank during operation, and the small pieces of straw are completely crushed into a paste under repeated hammering, so that the fermentation bacteria can fully react with the straw, thereby improving the fermentation speed and efficiency, shortening the fermentation cycle, and enabling the biogas to be fully released during the fermentation period, thereby avoiding the waste of resources.

Description

Technical Field

[0001] The invention relates to the technical field of straw fermentation, in particular to a fermentation device dedicated to a straw biogas project and a use method thereof. Background Art

[0002] Straw is a general term for the stems and leaves (ears) of mature crops, usually referring to the remaining parts of wheat straw, corn stalks, sorghum stalks, rice straw, bean stalks and other crops (usually coarse grains) after the seeds are harvested; in the treatment of straw, fermentation to produce biogas is a common means, which can solve the problem of environmental pollution caused by the arbitrary discarding or burning of straw.

[0003] The prior art CN108841576B proposes a straw fermentation device, including a cleaning bin shell and a fermentation bin shell. A water inlet is provided in the middle of the top of the cleaning bin shell, a feed inlet is provided on the left side of the cleaning bin shell, and a high-pressure water outlet is provided below the feed inlet. The straw to be fermented can be evenly stirred, so that the fermentation agent is in full contact with the straw to be fermented, thereby improving the efficiency of the fermentation and making the fermentation more complete.

[0004] However, the device still has certain defects in use. When working, the straw is stirred by a stirring mechanism. During the straw fermentation process, the inside of the straw cannot come into contact with the fermentation agent, so that the inside can only be fully fermented after the outside of the straw is rotten. However, in actual situations, if the straw is left to rot, the cycle is often long. In the existing fermentation device, the inside of the straw is often discharged by the equipment before it is completely fermented during the fermentation process, resulting in a large amount of resources being wasted. At the same time, the existing fermentation device cannot filter out the liquid in the waste residue when the waste residue is discharged, so it is not convenient for the subsequent treatment of the waste residue. In view of the above problems, we provide a fermentation device and fermentation method dedicated to biogas projects to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a fermentation device dedicated to a straw biogas project and a method of using the same, so as to solve the problems of incomplete fermentation and failure to separate the discharged waste into solid and liquid in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fermentation device dedicated to a straw biogas project comprises a bottom plate, two support seats are fixedly connected to one side of the upper end surface of the bottom plate, a heat preservation fermentation tank is rotatably connected between the two support seats, a biogas collection port is arranged at the upper end of the heat preservation fermentation tank, a heating system for heating is also arranged inside the heat preservation fermentation tank, and a tilting component for driving the heat preservation fermentation tank to tilt is arranged at the other end of the upper end surface of the bottom plate;

[0008] A bifurcated pipe is fixedly connected to one side of the upper end of the heat preservation fermentation tank, and a crushing tank is fixedly connected to the upper end of the bifurcated pipe. A crushing assembly for crushing straw is arranged in the crushing tank;

[0009] A discharge pipe is fixedly connected to the lower end of the heat preservation fermentation tank, and one end of the discharge pipe away from the support seat is connected to the heat preservation fermentation tank through a vertical pipe, a gate valve is installed on the vertical pipe, and a discharge component for discharging waste residue after fermentation is completed is provided in the discharge pipe;

[0010] The heat-insulating fermentation tank is provided with a processing component for hammering and stirring the straw inside the heat-insulating fermentation tank.

[0011] As a further solution of the present invention: the tilting assembly includes an electric cylinder, which is rotatably connected to a side of the upper end surface of the bottom plate away from the support seat, and the output end of the electric cylinder is rotatably connected to an end of the heat-insulating fermentation tank away from the support seat.

[0012] As a further solution of the present invention: the crushing assembly includes a crushing shaft, which is rotatably connected to a middle position inside the crushing tank, a plurality of crushing pieces are fixedly connected to the lower end of the crushing shaft, a spiral paddle is fixedly connected to the lower end of the crushing shaft located inside the bifurcated tube, a driving assembly for driving the crushing shaft to rotate is provided on one side of the upper end of the crushing tank, and a feeding assembly for adding materials to the crushing tank is also provided on the upper end of the crushing tank.

[0013] As a further solution of the present invention: the driving assembly includes a first motor, the first motor is fixedly connected to the upper end of one side of the crushing tank, the output end of the first motor and the upper end of the crushing shaft are both equipped with pulleys, and a belt is installed between the two pulleys.

[0014] As a further solution of the present invention: the feeding assembly includes a feeding port, which is fixedly connected to the upper end of one side of the crushing tank, and a closing plate is rotatably connected to the port of the feeding port, and a buckle is provided on the upper end of the closing plate to fix the feeding port.

[0015] As a further solution of the present invention: the discharge assembly includes a spiral conveying rod, which is rotatably connected to the inside of a discharge pipe, and the spiral paddles on the spiral conveying rod are gradually denser. A third motor for driving the spiral conveying rod to rotate is installed at one end of the discharge pipe away from the discharge port, and a collecting box is fixedly connected to the side of the lower end of the discharge pipe away from the third motor. An arc filter plate is provided at a position of the discharge pipe inside the collecting box, and a discharge pipe is connected to one end of the collecting box close to the third motor, and a discharge hopper is also fixedly connected between the two support seats.

[0016] As a further scheme of the present invention: the processing component includes a rectangular stirring frame, the rectangular stirring frame is rotatably connected to the bottom position of the heat-insulating fermentation tank, the connecting shaft head at one end of the rectangular stirring frame passes through the position where the heat-insulating fermentation tank is fixedly connected to the first gear, and the connecting shaft head at the other end of the rectangular stirring frame passes through the position where the heat-insulating fermentation tank is fixedly connected to a counterweight ball, both sides of the upper end of the heat-insulating fermentation tank are fixedly connected to a fixed frame, a crankshaft is rotatably connected between the two fixed frames, the upper end of the heat-insulating fermentation tank is slidably connected to a lifting frame, the lower end of the lifting frame is fixedly connected to a cross bar, and a plurality of hammer blocks are fixedly connected to the cross bar, springs are installed on the upper ends of vertical rods on both sides of the lifting frame, and connecting rods are rotatably connected to the crankshaft, and the end of the connecting rod away from the crankshaft is rotatably connected to the lifting frame, and one side of the upper end of the heat-insulating fermentation tank is also rotatably connected to a rotating shaft fixedly connected to the crankshaft connecting shaft, and a second gear is installed at the end of the rotating shaft, and a rotating component for driving the second gear and the first gear to rotate alternately is provided on one side of the heat-insulating fermentation tank.

[0017] As a further solution of the present invention: the rotating assembly includes an L-shaped fixing plate, the L-shaped fixing plate is fixedly connected to one end of the heat-insulating fermentation tank away from the support seat, a sliding rod is fixedly connected between the two L-shaped fixing plates, a rack is slidably connected to the sliding rod for cooperating with the second gear and the third motor, and a lifting assembly for driving the rack to lift and lower is also provided between the L-shaped fixing plates.

[0018] As a further solution of the present invention: the lifting assembly includes a reciprocating screw, which is rotatably connected between two L-shaped fixing plates, the L-shaped fixing plates are threadedly connected to the rack, and the L-shaped fixing plate at the lower end is provided with a second motor for driving the reciprocating screw to rotate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention can crush the input straw into small pieces through the crushing component, so as to facilitate the contact between the fermentation bacteria and the straw and improve the fermentation efficiency. At the same time, the processing component can hammer and stir the straw inside the heat-insulating fermentation tank during operation. The small pieces of straw are completely crushed into a paste under repeated hammering. Therefore, the fermentation bacteria can fully react with the straw, thereby improving the fermentation speed and efficiency, shortening the fermentation cycle, and enabling the biogas to be fully released during the fermentation period, thus avoiding the waste of resources.

[0021] 2. The present invention can process waste residues during use by means of the discharge assembly. During the processing, the spiral conveying rod conveys the waste residues, and the water in the waste residues can be filtered out when passing through the arc filter plate. At the same time, the paddle assembly of the spiral conveying rod is dense and can squeeze the waste residues. Therefore, the waste residues can be squeezed during the conveying process, and then the waste liquid in the waste residues can be discharged from the arc filter plate to achieve solid-liquid separation, which can facilitate the subsequent separate treatment of the waste residues and waste liquids, and is easy to use.

[0022] 3. The present invention can seal the feeding port during operation by means of a sealing plate, so that the interior of the heat-insulating fermentation tank is a sealed environment. Through the adsorption, absorption and biodegradation of anaerobic microorganisms, the straw pollutants are converted into gases (biogas) mainly composed of CH4 and CO2. The heating system arranged inside the heat-insulating fermentation tank can maintain the interior of the heat-insulating fermentation tank at about 48 degrees, thereby ensuring the fermentation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the other side of the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the crushing tank in the present invention.

[0026] Figure 4 It is a schematic cross-sectional view of the heat-insulating fermentation tank of the present invention.

[0027] Figure 5 It is a schematic diagram of the local cross-sectional structure in the present invention.

[0028] Figure 6 It is a schematic diagram of the structure when the closing plate is opened in the present invention.

[0029] Among them: 1. bottom plate; 2. support seat; 3. heat preservation fermentation tank; 4. spring; 5. fixed frame; 6. crankshaft; 7. crushing tank; 8. feeding port; 9. pulley; 10. belt; 11. first motor; 12. biogas collection port; 13. rotating shaft; 14. rack; 15. sliding rod; 16. reciprocating screw rod; 17. first gear; 18. second motor; 19. third motor; 20. electric cylinder; 21. discharge pipe; 22. collection box; 23. discharge hopper; 24. counterweight ball; 25. discharge pipe; 26. bifurcated pipe; 27. closing plate; 28. second gear; 29. ​​spiral paddle; 30. crushing piece; 31. spiral conveying rod; 32. gate valve; 33. hammer block; 34. arc filter plate; 35. lifting frame; 36. connecting rod; 37. rectangular stirring frame; 38. L-shaped fixed plate; 39. crushing shaft. DETAILED DESCRIPTION

[0030] 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 6 In the embodiment of the present invention, a fermentation device dedicated to a straw biogas project comprises a bottom plate 1, two support seats 2 are fixedly connected to one side of the upper end surface of the bottom plate 1, a heat preservation fermentation tank 3 is rotatably connected between the two support seats 2, a biogas collection port 12 is arranged at the upper end of the heat preservation fermentation tank 3, a heating system for heating is also arranged inside the heat preservation fermentation tank 3, a tilting assembly for driving the heat preservation fermentation tank 3 to tilt is arranged at the other end of the upper end surface of the bottom plate 1; the tilting assembly comprises an electric cylinder 20, the electric cylinder 20 is rotatably connected to a side of the upper end surface of the bottom plate 1 away from the support seat 2, and an output end of the electric cylinder 20 is rotatably connected to an end of the heat preservation fermentation tank 3 away from the support seat 2.

[0032] During operation, the electric cylinder 20 is set up to tilt the heat preservation fermentation tank 3 when the waste residue inside the heat preservation fermentation tank 3 needs to be discharged. When tilting, the output end of the electric cylinder 20 drives the heat preservation fermentation tank 3 to rotate with the upper end of the heat preservation fermentation tank 3 as the center, so that one end of the heat preservation fermentation tank 3 is tilted. When one end of the heat preservation fermentation tank 3 is tilted, the mixture of waste residue and liquid inside will flow into the discharge pipe 21.

[0033] A bifurcated tube 26 is fixedly connected to one side of the upper end of the heat-insulating fermentation tank 3, and a crushing tank 7 is fixedly connected to the upper end of the bifurcated tube 26. A crushing assembly for crushing straw is provided in the crushing tank 7; the crushing assembly includes a crushing shaft 39, which is rotatably connected to the middle position inside the crushing tank 7, and a plurality of crushing pieces 30 are fixedly connected to the lower end of the crushing shaft 39, and a spiral paddle 29 is fixedly connected to the position inside the bifurcated tube 26 at the lower end of the crushing shaft 39; a driving assembly for driving the crushing shaft 39 to rotate is provided on one side of the upper end of the crushing tank 7, and a feeding assembly for adding materials to the crushing tank 7 is also provided at the upper end of the crushing tank 7, and the driving assembly includes a first motor 11, which is fixedly connected to the upper end of one side of the crushing tank 7, and pulleys 9 are installed at the output end of the first motor 11 and the upper end of the crushing shaft 39, and a belt 10 is installed between the two pulleys 9.

[0034] During operation, the first motor 11 drives the belt 10 and the pulley 9 to operate. The operation of the pulley 9 can drive the crushing shaft 39 to rotate. The rotation of the crushing shaft 39 drives the crushing pieces 30 and the spiral paddle 29 to rotate. The crushing pieces 30 rotate to crush the straw into small pieces. The spiral paddle 29 rotates to transport the material upward to prevent the straw from falling into the forked pipe 26. After crushing for a period of time, the output end of the first motor 11 is controlled to reverse. At this time, the spiral paddle 29 reverses, and the spiral paddle 29 reverses to discharge the crushed straw into the forked pipe 26.

[0035] The upper end of the crushing tank 7 is also provided with a feeding assembly for adding materials into the crushing tank 7; the feeding assembly includes a feeding port 8, which is fixedly connected to the upper end of one side of the crushing tank 7, and a closing plate 27 is rotatably connected to the port of the feeding port 8, and a buckle is provided on the upper end of the closing plate 27 to fix the feeding port 8. The closing plate 27 can be provided to close the feeding port 8 when in use, so that the heat preservation fermentation tank 3 forms a sealed structure, which is conducive to anaerobic high temperature fermentation.

[0036] A discharge pipe 21 is fixedly connected to the lower end of the heat-insulating fermentation tank 3. The end of the discharge pipe 21 away from the support seat 2 is connected to the heat-insulating fermentation tank 3 by a vertical pipe, and a gate valve 32 is installed on the vertical pipe. A discharge component for discharging waste residue after fermentation is completed is provided in the discharge pipe 21; the discharge component includes a spiral conveying rod 31, which is rotatably connected to the inside of the discharge pipe 21, and the spiral paddles on the spiral conveying rod 31 are gradually dense. A third motor 19 for driving the spiral conveying rod 31 to rotate is installed at the end of the discharge pipe 21 away from the discharge port, and a collecting box 22 is fixedly connected to the side of the lower end of the discharge pipe 21 away from the third motor 19. An arc filter plate 34 is provided at the position of the discharge pipe 21 located inside the collecting box 22, and a discharge pipe 25 is connected to the end of the collecting box 22 close to the third motor 19, and a discharge hopper 23 is also fixedly connected between the two support seats 2.

[0037] During operation, waste is discharged from the heat-insulating fermentation tank 3 into the discharge pipe 21, and then the third motor 19 drives the spiral conveying rod 31 to rotate, and the spiral conveying rod 31 conveys the waste to the port of the discharge pipe 21. When conveying through the arc filter plate 34, the liquid in the waste is filtered out from the arc filter plate 34. At the same time, the gradually dense spiral sheets on the spiral conveying rod 31 can play an extrusion role, continuously squeezing the waste, filtering out water, and realizing solid-liquid waste. The leaked liquid is discharged from the discharge pipe 25, and the solid waste is discharged from the discharge hopper 23.

[0038] The heat-insulating fermentation tank 3 is provided with a processing component for hammering and stirring the straw inside the heat-insulating fermentation tank 3; the processing component includes a rectangular stirring frame 37, the rectangular stirring frame 37 is rotatably connected to the bottom position of the heat-insulating fermentation tank 3, the connecting shaft head at one end of the rectangular stirring frame 3 passes through the heat-insulating fermentation tank 3 and is fixedly connected to the first gear 17, the connecting shaft head at the other end of the rectangular stirring frame 3 passes through the heat-insulating fermentation tank 3 and is fixedly connected to a counterweight ball 24, the counterweight ball 24 can maintain a horizontal or nearly flat state when the rectangular stirring frame 37 is not in motion, so as to prevent the hammer block 33 from hammering on the rectangular stirring frame 37 when it moves up and down; the upper ends of the heat-insulating fermentation tank 3 are fixedly connected to fixed frames 5, and a crankshaft 6 is rotatably connected between the two fixed frames 5. The upper end of the heat-insulating fermentation tank 3 is slidably connected to a lifting frame 35, and the lower end of the lifting frame 35 is fixedly connected to a cross bar, and a plurality of hammer blocks 33 are fixedly connected to the cross bar. Springs 4 are installed on the upper ends of the vertical bars on both sides of the lifting frame 35. The springs 4 can keep the hammer blocks 33 in a high-position device when the hammer blocks 33 are not in action, so as to avoid affecting the action of the rectangular stirring frame 37; the crankshaft 6 is rotatably connected to a connecting rod 36, and the end of the connecting rod 36 away from the crankshaft 6 is rotatably connected to the lifting frame 35. One side of the upper end of the heat-insulating fermentation tank 3 is also rotatably connected to a rotating shaft 13 fixedly connected to the connecting shaft of the crankshaft 6, and a second gear 28 is installed at the end of the rotating shaft 13. A rotating component for driving the second gear 28 and the first gear 17 to rotate alternately is provided on one side of the heat-insulating fermentation tank 3.

[0039] During operation, the rotating assembly drives the first gear 17 and the second gear 28 to rotate alternately. When the first gear 17 rotates, it can drive the rectangular stirring frame 37 to rotate. The rectangular stirring frame 37 rotates to stir the material at the bottom of the heat-insulating fermentation tank 3. When the second gear 28 rotates, the second gear 28 drives the crankshaft 6 to rotate. The rotation of the crankshaft 6 drives the connecting rod 36 to move. The rotation of the connecting rod 36 drives the lifting frame 35 to move up and down. When the lifting frame 35 moves up and down, it drives the hammer block 33 to perform an up and down hammering action, so that the hammering action of the hammer block 33 and the stirring action of the rectangular stirring frame 37 can be performed alternately.

[0040] The rotating assembly includes an L-shaped fixing plate 38, which is fixedly connected to one end of the heat-insulating fermentation tank 3 away from the support seat 2, and a sliding rod 15 is fixedly connected between the two L-shaped fixing plates 38. A rack 14 for cooperating with the second gear 28 and the third motor 19 is slidably connected to the sliding rod 15, and a lifting assembly for driving the rack 14 to lift and lower is also provided between the L-shaped fixing plates 38; the lifting assembly includes a reciprocating screw rod 16, which is rotatably connected between the two L-shaped fixing plates 38, and the L-shaped fixing plate 38 is threadedly connected to the rack 14, and the L-shaped fixing plate 38 at the lower end is provided with a second motor 18 for driving the reciprocating screw rod 16 to rotate; when working, the second motor 18 drives the reciprocating screw rod 16 to rotate, and the rotation of the reciprocating screw rod 16 drives the rack 14 to move up and down, and the up and down movement of the rack 14 can drive the second gear 28 and the first gear 17 to rotate alternately.

[0041] The working principle of the present invention is as follows: when working, straw is put into the crushing tank 7, and then the first motor 11 drives the belt 10 and the pulley 9 to operate, the operation of the pulley 9 can drive the crushing shaft 39 to rotate, the rotation of the crushing shaft 39 drives the crushing piece 30 and the spiral paddle 29 to rotate, the crushing piece 30 rotates to crush the straw into small pieces, the spiral paddle 29 rotates to transport the material upward to prevent the straw from falling into the bifurcated pipe 26, after crushing for a period of time, the output end of the first motor 11 is controlled to reverse, at this time the spiral paddle 29 reverses, and the spiral paddle 29 reverses to discharge the crushed straw into the bifurcated pipe 26 for heat preservation and fermentation. When the material inside the tank 3 reaches the required height, the fermentation agent is added from the feeding port 8, and the fermentation agent enters the heat preservation fermentation tank 3 along the bifurcated pipe 26, and then the sealing plate 27 is closed, and the inside of the heat preservation fermentation tank 3 is kept at the required temperature through the heating system for fermentation. During the fermentation, the rotating assembly drives the first gear 17 and the second gear 28 to rotate alternately. When the first gear 17 rotates, it can drive the rectangular stirring frame 37 to rotate. The rectangular stirring frame 37 rotates to stir the material at the bottom of the heat preservation fermentation tank 3. When the second gear 28 rotates, the second gear 28 drives the crankshaft 6 to rotate, and the crankshaft 6 rotates to drive the crankshaft 6 to rotate. The movable connecting rod 36 moves, and the connecting rod 36 rotates to drive the lifting frame 35 to move up and down. When the lifting frame 35 moves up and down, it drives the hammer block 33 to hammer up and down, so that the material can be stirred after hammering several times, and so on, the material is completely crushed, and then the biogas produced by fermentation is collected into the biogas storage device through the biogas collection port 12. After the fermentation is completed, the heat preservation fermentation tank 3 is tilted by the electric cylinder 20 when the waste residue inside the heat preservation fermentation tank 3 is discharged. When tilting, the output end of the electric cylinder 20 drives the heat preservation fermentation tank 3 to rotate with the upper end of the heat preservation fermentation tank 3 as the center, so that one end of the heat preservation fermentation tank 3 tilts The inclination of one end of the heat-insulating fermentation tank 3 causes the mixture of waste residue and liquid inside to flow into the discharge pipe 21, and the waste is discharged from the heat-insulating fermentation tank 3 into the discharge pipe 21, and then the third motor 19 drives the screw conveying rod 31 to rotate, and the screw conveying rod 31 conveys the waste to the end of the discharge pipe 21. When conveying through the arc filter plate 34, the liquid in the waste is filtered out from the arc filter plate 34. At the same time, the gradually dense spiral sheets on the screw conveying rod 31 can play an extrusion role, continuously squeezing the waste, filtering out water, and realizing solid-liquid waste. The leaked liquid is discharged from the discharge pipe 25, and the solid waste is discharged from the discharge hopper 23.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Although this specification is described in accordance with the implementation modes, not every implementation mode includes only one technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fermentation device dedicated to a straw biogas project, comprising a bottom plate (1), characterized in that: Two support seats (2) are fixedly connected to one side of the upper end surface of the bottom plate (1), a heat preservation fermentation tank (3) is rotatably connected between the two support seats (2), a biogas collection port (12) is provided at the upper end of the heat preservation fermentation tank (3), a heating system for heating is also provided inside the heat preservation fermentation tank (3), and a tilting component for driving the heat preservation fermentation tank (3) to tilt is provided at the other end of the upper end surface of the bottom plate (1); A bifurcated pipe (26) is fixedly connected to one side of the upper end of the heat-insulating fermentation tank (3), and a crushing tank (7) is fixedly connected to the upper end of the bifurcated pipe (26), wherein a crushing assembly for crushing straw is provided in the crushing tank (7); The lower end of the heat preservation fermentation tank (3) is fixedly connected with a discharge pipe (21); the end of the discharge pipe (21) away from the support seat (2) is connected to the heat preservation fermentation tank (3) by a vertical pipe, and a gate valve (32) is installed on the vertical pipe. The discharge pipe (21) is provided with a discharge component for discharging waste residue after fermentation is completed; The heat-insulating fermentation tank (3) is provided with a processing component for hammering and stirring the straw inside the heat-insulating fermentation tank (3); The tilting assembly comprises an electric cylinder (20), the electric cylinder (20) being rotatably connected to a side of the upper end surface of the bottom plate (1) away from the support seat (2), and the output end of the electric cylinder (20) being rotatably connected to an end of the heat-insulating fermentation tank (3) away from the support seat (2); The pulverizing assembly comprises a pulverizing shaft (39), the pulverizing shaft (39) is rotatably connected to a central position inside the pulverizing tank (7), a plurality of pulverizing sheets (30) are fixedly connected to the lower end of the pulverizing shaft (39), a spiral paddle (29) is fixedly connected to the lower end of the pulverizing shaft (39) located inside the bifurcated tube (26), a driving assembly for driving the pulverizing shaft (39) to rotate is provided on one side of the upper end of the pulverizing tank (7), and a feeding assembly for adding materials into the pulverizing tank (7) is also provided on the upper end of the pulverizing tank (7); The driving assembly comprises a first motor (11), the first motor (11) is fixedly connected to the upper end of one side of the crushing tank (7), a pulley (9) is installed at the output end of the first motor (11) and the upper end of the crushing shaft (39), and a belt (10) is installed between the two pulleys (9); The feeding assembly comprises a feeding port (8), the feeding port (8) being fixedly connected to the upper end of one side of the crushing tank (7), a closing plate (27) being rotatably connected to the end of the feeding port (8), and a buckle for fixing the closing plate (27) to the feeding port (8) being provided at the upper end; The discharge assembly comprises a spiral conveying rod (31), the spiral conveying rod (31) is rotatably connected to the inside of a discharge pipe (21), the spiral paddles on the spiral conveying rod (31) are gradually denser, a third motor (19) for driving the spiral conveying rod (31) to rotate is installed at one end of the discharge pipe (21) away from the discharge port, a collecting box (22) is fixedly connected to the side of the lower end of the discharge pipe (21) away from the third motor (19), an arc filter plate (34) is provided at a position of the discharge pipe (21) located inside the collecting box (22), a liquid discharge pipe (25) is connected to one end of the collecting box (22) close to the third motor (19), and a discharge hopper (23) is also fixedly connected between the two support seats (2); The processing assembly comprises a rectangular stirring frame (37), the rectangular stirring frame (37) is rotatably connected to the bottom of the heat-insulating fermentation tank (3), the connecting shaft head at one end of the rectangular stirring frame (37) passes through the position of the heat-insulating fermentation tank (3) and is fixedly connected to a first gear (17), the connecting shaft head at the other end of the rectangular stirring frame (37) passes through the position of the heat-insulating fermentation tank (3) and is fixedly connected to a counterweight ball (24), both sides of the upper end of the heat-insulating fermentation tank (3) are fixedly connected to fixed frames (5), a crankshaft (6) is rotatably connected between the two fixed frames (5), and a lifting frame (35) is slidably connected to the upper end of the heat-insulating fermentation tank (3), and the lifting frame (35) is slidably connected to the upper end of the heat-insulating fermentation tank (3). 5) The lower end is fixedly connected with a cross bar, and a plurality of hammer blocks (33) are fixedly connected to the cross bar. The upper ends of the vertical bars on both sides of the lifting frame (35) are both installed with springs (4). The crankshaft (6) is rotatably connected with a connecting rod (36). The end of the connecting rod (36) away from the crankshaft (6) is rotatably connected to the lifting frame (35). The upper end of the heat-insulating fermentation tank (3) is also rotatably connected with a rotating shaft (13) fixedly connected to the connecting shaft of the crankshaft (6). The end of the rotating shaft (13) is installed with a second gear (28). One side of the heat-insulating fermentation tank (3) is provided with a rotating assembly for driving the second gear (28) and the first gear (17) to rotate alternately; The rotating assembly comprises an L-shaped fixing plate (38), the L-shaped fixing plate (38) being fixedly connected to one end of the heat-insulating fermentation tank (3) away from the supporting seat (2), a sliding rod (15) being fixedly connected between the two L-shaped fixing plates (38), a rack (14) being slidably connected to the sliding rod (15) for cooperating with the second gear (28) and the third motor (19), and a lifting assembly for driving the rack (14) to be lifted and lowered is also provided between the L-shaped fixing plates (38); The lifting assembly comprises a reciprocating screw rod (16), wherein the reciprocating screw rod (16) is rotatably connected between two L-shaped fixing plates (38), wherein the L-shaped fixing plates (38) are threadedly connected to the rack (14), and the L-shaped fixing plate (38) at the lower end is provided with a second motor (18) for driving the reciprocating screw rod (16) to rotate.

2. A method for using the fermentation device dedicated to straw biogas engineering according to claim 1, characterized in that: The steps include: Step 1: During operation, straw is put into the crushing tank (7), and then the first motor (11) drives the belt (10) and the pulley (9) to operate. The operation of the pulley (9) can drive the crushing shaft (39) to rotate, and the rotation of the crushing shaft (39) drives the crushing piece (30) and the spiral paddle (29) to rotate. The crushing piece (30) rotates to crush the straw into small pieces, and the spiral paddle (29) rotates to transport the material upward to prevent the straw from falling into the bifurcated tube (26). After a period of crushing, Afterwards, the output end of the first motor (11) is controlled to reverse, and at this time, the spiral paddle (29) is reversed, and the spiral paddle (29) is reversed to discharge the crushed straw into the bifurcated pipe (26). When the material inside the heat preservation fermentation tank (3) reaches the required height, the fermentation agent is added from the feeding port (8), and the fermentation agent enters the heat preservation fermentation tank (3) along the bifurcated pipe (26), and then the sealing plate (27) is closed, and the interior of the heat preservation fermentation tank (3) is maintained at the required temperature through the heating system for fermentation; Step 2, while fermenting, the rotating assembly drives the first gear (17) and the second gear (28) to rotate alternately. When the first gear (17) rotates, it can drive the rectangular stirring frame (37) to rotate. The rectangular stirring frame (37) rotates to stir the material at the bottom of the heat-insulating fermentation tank (3). When the second gear (28) rotates, the second gear (28) drives the crankshaft (6) to rotate. The rotation of the crankshaft (6) drives the connecting rod (36) to move. The rotation of the connecting rod (36) drives the lifting frame (35) to move up and down. When the lifting frame (35) moves up and down, it drives the hammer block (33) to perform an up and down hammering action, thereby achieving stirring of the material after hammering several times. This reciprocating process completely crushes the material, and then the biogas generated by the fermentation is collected into the biogas storage device through the biogas collection port (12); Step 3: After the fermentation is completed, the heat preservation fermentation tank (3) is tilted by the electric cylinder (20) when the waste residue inside the heat preservation fermentation tank (3) is discharged. When tilting, the output end of the electric cylinder (20) drives the heat preservation fermentation tank (3) to rotate around the upper end of the heat preservation fermentation tank (3), so that one end of the heat preservation fermentation tank (3) is tilted. The tilting of one end of the heat preservation fermentation tank (3) causes the mixture of waste residue and liquid inside to flow into the discharge pipe (21), and the waste is discharged from the heat preservation fermentation tank (3) into the discharge pipe ( 21), and then the third motor (19) drives the spiral conveying rod (31) to rotate, and the spiral conveying rod (31) conveys the waste to the port of the discharge pipe (21). When conveying through the arc filter plate (34), the liquid in the waste is filtered out from the arc filter plate (34). At the same time, the gradually dense spiral sheets on the spiral conveying rod (31) can play a squeezing role, continuously squeezing the waste, filtering out water, and realizing solid-liquid waste. The leaked liquid is discharged from the discharge pipe (25), and the solid waste is discharged from the discharge hopper (23).

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