A plant straw biogas fermentation system

Abstract

The present invention relates to the technical field of fermentation equipment, specifically a plant straw biogas fermentation system, including a fermentation tank, the upper end of the fermentation tank is fixedly connected to a motor, the lower end of the motor is fixedly connected to a main rod, the annular outer surface of the main rod is fixedly connected to a plurality of stirring rods, the lower end of the main rod is fixedly connected to a screw, the lower end outer surface of the fermentation tank is fixedly connected to a storage tank, and the bottom end of the annular inner surface of the storage tank is fixedly connected to a plurality of fixed rods. The present invention drives the straw raw materials accumulated at the bottom of the fermentation tank to move upward through the rotation of the screw, so that the raw materials accumulated at the bottom of the tank can fully contact with microorganisms, thereby improving the production yield of biogas, and at the same time, it is convenient to move the waste residue in the fermentation tank into the storage tank and grind it for processing, which facilitates the discharge operation of the fermented straw waste residue, and does not require the staff to carry the waste residue to other devices for grinding and processing, thereby saving labor.

Description

Technical Field

[0001] The invention relates to the technical field of fermentation equipment, in particular to a plant straw biogas fermentation system. Background Art

[0002] Biogas fermentation, also known as anaerobic digestion or anaerobic fermentation, refers to the production of a combustible mixed gas with methane as the main component through the metabolism of anaerobic microorganisms under certain moisture, temperature and anaerobic conditions. The biogas fermentation system is based on the principle of biogas fermentation, with energy production as the goal, and ultimately achieves the comprehensive utilization of biogas, biogas slurry and biogas residue.

[0003] A Chinese patent discloses a biogas fermentation tank with patent application number CN201510229563.2, which comprises a sealed fermentation tank shell, on the tank wall of which are respectively provided a biogas slurry feed port, a sludge discharge port and a biogas exhaust port; the biogas slurry feed port is arranged on the tank wall of the fermentation tank shell opposite to the supernatant liquid layer of the biogas slurry in the fermentation tank shell, the biogas slurry feed port is communicated with the supernatant liquid layer of the biogas slurry in the fermentation tank shell, and a first sealing device is arranged at the biogas slurry feed port, which allows organic matter to enter but prevents gas from entering the fermentation tank shell.

[0004] The above-mentioned comparative patent is provided with a heat exchange and stirring device, which can stir and mix the active layer, supernatant layer and scum layer of the biogas slurry during operation, so that the living environment suitable for anaerobic microorganisms can be expanded to all the biogas slurries above the sludge layer, so that the microorganisms and the biogas slurry are evenly mixed, thereby greatly improving the biogas production rate. However, due to the limited stirring range of the heat exchange and stirring device, the fermentation raw materials in the fermentation tank will settle and accumulate at the bottom of the tank due to gravity, making it difficult for the raw materials accumulated at the bottom of the tank to fully contact with the microorganisms, affecting the production yield of biogas. In addition, since the waste liquid and waste residue after fermentation can be used as fertilizers in agriculture, the existing technology is not convenient for solid-liquid separation of waste materials, and the fermented straw waste residue is not convenient for discharging. After discharging, the staff has to carry it to other devices for crushing and processing, which is time-consuming and labor-intensive, reducing the practicality of the device.

[0005] Therefore, a plant straw biogas fermentation system is proposed. Summary of the invention

[0006] The object of the present invention is to provide a plant straw biogas fermentation system to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a plant straw biogas fermentation system, comprising a fermentation tank and a motor, the lower end of the motor penetrates the upper end of the fermentation tank and is fixedly connected to a main rod, the annular outer surface of the main rod is fixedly connected to a plurality of stirring rods, the lower end of the main rod is fixedly connected to a screw rod, the lower end outer surface of the fermentation tank is fixedly connected to a storage tank, the bottom end of the annular inner surface of the storage tank is fixedly connected to a plurality of fixing rods, the fixing rod is fixedly connected to a fixing block on a side away from the storage tank, the lower end of the screw rod is movably connected to the fixing block through a bearing, the lower end of the storage tank is hinged with a sealing door, and a partition mechanism is provided between the fermentation tank and the storage tank;

[0008] The partition mechanism includes a fixed ring, a cover plate, a movable block, a slide groove, a connecting rod, a movable ring, a spring, a first arc groove, a turning handle, a movable groove and a first arc block. The upper end of the fixed ring is fixedly connected to the fermentation tank, and the lower end of the fixed ring is fixedly connected to the storage tank. Two cover plates are symmetrically fixedly connected to the upper and lower ends of the annular inner surface of the fixed ring. A plurality of movable blocks are movably connected between the two cover plates. The plurality of movable blocks are distributed in an annular structure. The outer surface of the screw rod fits the movable block. A plurality of slide grooves are provided on the annular outer surface of the movable block on one side close to the fixed ring. A connecting rod is slidably connected to the inside of the slide groove. The connecting rod is fixedly connected with a movable ring on the side away from the sliding groove. The movable ring is movably connected to the fixed ring. A spring is sleeved on the outer surface of the connecting rod. One side of the spring is fixedly connected to the movable ring. The other side of the spring is fixedly connected to the movable block. A first arc groove is provided on the outer surface of the upper end of the movable block close to the fixed ring. A plurality of first arc blocks are fixedly connected to the annular inner surface of the fixed ring. A turning handle is fixedly connected to the right side of the annular outer surface of the movable ring. The side of the turning handle away from the movable ring passes through the fixed ring and extends to the outside of the fixed ring. A movable groove is provided on the outer surface of the fixed ring close to the turning handle.

[0009] Since the stirring range of the heat exchange stirring device is limited, the fermentation raw materials in the fermentation tank will settle and accumulate at the bottom of the tank due to gravity, making it difficult for the raw materials accumulated at the bottom of the tank to fully contact with the microorganisms, affecting the production yield of biogas. Since the waste liquid and waste residue after fermentation can be used as fertilizers in agriculture, it is not convenient to discharge the fermented straw waste residue. After discharging, the staff must carry it to other devices for crushing and processing, which is time-consuming and labor-intensive, reducing the practicality of the device. The present invention provides a stirring rod, first adds the straw raw materials and other fermentation raw materials into the fermentation tank through the feed inlet, starts the motor, and the motor rotates to drive the main rod and the stirring rod to rotate. Under the stirring action of the stirring rod, the microorganisms are fully in contact with the straw raw materials, thereby improving the biogas production yield. When the main rod rotates, it drives the screw to rotate, so that the raw materials accumulated at the bottom of the tank move upward along the screw groove. By providing a separation mechanism, after the fermentation is completed, when it is necessary to discharge the waste residue, the motor is turned off, and the movable ring is rotated by rotating the handle, thereby driving the connecting rod to rotate, and the movable block is rotated at the same time. When the movable block rotates to the first When the first arc groove corresponds to the position of the first arc block, the movable block moves toward the movable ring under the action of the spring, and the movable ring is rotated until the movable block and the movable groove are in contact with each other, and the movable block and the screw are separated from each other, so that the contact point between the movable block and the screw is opened, and the motor is started and the direction of the motor is changed, so that the screw rotates in the other direction, so that the waste residue moves downward along the screw groove and enters the storage tank. After the waste residue is crushed by the screw in the storage tank, the sealing door is opened, and the screw continues to rotate so that the crushed waste residue moves out of the storage tank along the screw groove, completing the discharging operation. The invention realizes that the screw and the motor cooperate with each other, and the rotation of the screw drives the straw raw materials accumulated at the bottom of the fermentation tank to move upward, so that the raw materials accumulated at the bottom of the tank can fully contact with the microorganisms, thereby improving the production yield of biogas. The separation mechanism cooperates with the screw to facilitate the transfer of waste residues in the fermentation tank into the storage tank and crushing and processing it, and facilitates the discharge operation of the fermented straw waste residue. There is no need for the staff to carry the waste residue to other devices for crushing and processing, which saves labor and improves the practicability of the device.

[0010] Preferably, a plurality of first through slots are formed inside the cover plate, a plurality of second through slots are formed inside the movable block, the first through slots have the same inner diameter as the second through slots, and the first through slots and the second through slots are arranged alternately.

[0011] During operation, when the handle is turned to open the joint between the movable block and the screw, waste liquid will flow into the storage tank, and straw waste residue will flow out of the storage tank together with the waste liquid. The waste liquid and the waste residue will mix with each other, which makes it inconvenient to crush the straw waste residue. The present invention sets a first through groove and a second through groove. After fermentation is completed, the sealing door is opened, and the handle is turned to drive the movable block to rotate to the position where the second through groove corresponds to the first through groove, so that the waste liquid in the fermentation tank flows out of the storage tank through the first through groove and the second through groove, thereby realizing solid-liquid separation. The present invention sets the first through groove and the second through groove to realize solid-liquid separation of the waste, thereby facilitating the subsequent crushing operation of the straw waste residue.

[0012] Preferably, a side of the first arc block close to the movable block is movably connected with a rolling mechanism;

[0013] The rolling mechanism includes a fixed groove, a rotating rod, a ball and a rolling groove. The fixed groove is opened on the arc-shaped outer surface of the first arc block close to the movable block. The upper and lower ends of the inner surface of the fixed groove are fixedly connected with the rotating rod. The annular outer surface of the rotating rod is movably connected with the ball. The rolling groove is opened on the arc-shaped outer surface of the movable block close to the first arc block. The ball is rollingly connected to the rolling groove.

[0014] During operation, when the handle is turned to drive the movable ring and the movable block to rotate, the movable block and the first arc block move relative to each other, thereby generating friction with the first arc block, making it difficult for the operator to turn the handle, and the first arc block and the movable block will be worn due to friction, affecting the normal use of the device. The present invention provides a rolling mechanism and utilizes a rolling connection between a ball and a rolling groove, thereby reducing the friction generated by the relative movement of the movable block and the first arc block, making it easier for the operator to operate, and reducing the wear on the movable block and the first arc block, thereby increasing the service life of the device.

[0015] Preferably, a second arc block is fixedly connected to the center position of the upper end of the outer surface of one side of the first arc block close to the movable block, a second arc groove is provided at the connection between the two movable blocks close to the second arc block, the second arc block and the second arc groove are fitted together, a third arc groove is provided on the outer surface of the upper end of the movable block in the clockwise direction of the second arc groove, a fourth arc groove is provided at the center position of the upper end of the arc-shaped inner surface of the first arc groove, and the third arc groove and the fourth arc groove both match the second arc block.

[0016] Since the movable block and the cover plate are located inside the device, it is not convenient for the operator to observe and it is difficult to turn the handle to make the first through groove correspond to the second through groove, which affects the normal solid-liquid separation operation. In addition, due to the lack of a fixing mechanism between the movable block and the first arc-shaped groove, it is easy for the movable block to rotate under the influence of the screw, thereby affecting the normal operation of the device. The present invention fixes the movable block by fitting the second arc block and the second arc groove together, rotates the handle to rotate the movable block, separates the second arc groove from the second arc block, and continues to rotate the movable block to make the third arc groove and The second arc blocks are engaged with each other, and the first through groove and the second through groove are corresponding to each other at this time. When the movable block continues to be rotated to make the fourth arc groove and the second arc block engage with each other, the first arc block and the first arc groove are fitted with each other, and the connection between the movable block and the screw is open. The present invention fixes the movable block by the mutual engagement of the second arc block and the second arc groove to prevent the movable block from rotating due to the influence of the screw and affecting the normal operation of the device. The second arc block and the third arc groove are engaged with each other to make the first through groove and the second through groove correspond to each other, so that the waste liquid can flow out, thereby ensuring the normal solid-liquid separation operation.

[0017] Preferably, the corners on both sides of the first arc groove, the second arc groove, the third arc groove and the fourth arc groove are all designed as arc structures, and the annular outer surface of each movable block is fixedly connected with three connecting rods, and the three connecting rods are symmetrically distributed with the center of the annular outer surface of the movable block as the midpoint.

[0018] During operation, the present invention designs the corners on both sides of the first arc groove, the second arc groove, the third arc groove and the fourth arc groove into arc structures to prevent the first arc block and the first arc groove from being interlocked when the movable block rotates. Similarly, it can also prevent the second arc block and the second arc groove, the third arc groove and the fourth arc groove from being interlocked.

[0019] Preferably, a plurality of through holes are opened inside the sealing door, and filter nets are provided on the upper ends of the through holes and the annular inner surfaces of the first through grooves.

[0020] During operation, by opening a through hole inside the sealing door, the juice generated when the screw crushes the straw waste can be filtered out, and by arranging a filter on the upper end of the through hole and the annular inner surface of the first through groove, it can prevent the straw waste from entering the through hole or the first through groove and causing blockage.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention cooperates with a screw and a motor to drive the straw raw materials accumulated at the bottom of the fermentation tank to move upward through the rotation of the screw, so that the raw materials accumulated at the bottom of the tank can fully contact with the microorganisms, thereby improving the production yield of biogas. The separation mechanism cooperates with the screw to facilitate the transfer of waste residues in the fermentation tank into the storage tank and the crushing and processing thereof, thereby facilitating the discharge operation of the fermented straw waste residues, and eliminating the need for staff to transport the waste residues to other devices for crushing and processing, thereby saving labor and improving the practicability of the device. The first through groove and the second through groove are provided to realize the solid-liquid separation operation of the waste material, thereby facilitating the subsequent crushing and processing operation of the straw waste residues. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a cross-sectional view of the internal structure of the partition mechanism of the present invention;

[0025] Figure 3 It is a cross-sectional view of the combination of the slideway and the connecting rod of the present invention;

[0026] Figure 4 It is a schematic diagram of the combination of the cover plate and the movable block of the present invention;

[0027] Figure 5 An exploded view of the separation mechanism of the present invention;

[0028] Figure 6 It is a cross-sectional view of the combination of the first arc block and the rolling mechanism of the present invention;

[0029] Figure 7 For the present invention Figure 5 A in the figure shows a magnified structural view.

[0030] In the figure: 1, fermentation tank; 11, motor; 12, main rod; 13, stirring rod; 14, screw; 15, storage tank; 16, fixing rod; 17, fixing block; 18, sealing door; 19, through hole;

[0031] 2. Separation mechanism; 21. Fixed ring; 22. Cover plate; 23. Movable block; 24. Slide groove; 25. Connecting rod; 26. Movable ring; 27. Spring; 28. First arc groove; 29. ​​Turn handle; 20. Movable groove; 211. First arc block; 212. First through groove; 213. Second through groove; 214. Second arc block; 215. Second arc groove; 216. Third arc groove; 217. Fourth arc groove;

[0032] 3. Rolling mechanism; 31. Fixed groove; 32. Rotating rod; 33. Ball; 34. Rolling groove. DETAILED DESCRIPTION

[0033] The following is a partial embodiment of the present invention, but not all 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.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figures 1 to 7 The present invention provides a plant straw biogas fermentation system technical solution:

[0037] A plant straw biogas fermentation system, such as Figures 1 to 5 As shown, it includes a fermentation tank 1 and a motor 11, the lower end of the motor 11 passes through the upper end of the fermentation tank 1 and is fixedly connected to a main rod 12, the annular outer surface of the main rod 12 is fixedly connected to a plurality of stirring rods 13, the lower end of the main rod 12 is fixedly connected to a screw rod 14, the lower end outer surface of the fermentation tank 1 is fixedly connected to a storage tank 15, the bottom end of the annular inner surface of the storage tank 15 is fixedly connected to a plurality of fixing rods 16, the fixing rod 16 is fixedly connected to a fixing block 17 on a side away from the storage tank 15, the lower end of the screw rod 14 is movably connected to the fixing block 17 through a bearing, the lower end of the storage tank 15 is hinged with a sealing door 18, and a partition mechanism 2 is provided between the fermentation tank 1 and the storage tank 15;

[0038] The partition mechanism 2 includes a fixed ring 21, a cover plate 22, a movable block 23, a slide 24, a connecting rod 25, a movable ring 26, a spring 27, a first arc-shaped groove 28, a turning handle 29, a movable groove 20 and a first arc-shaped block 211. The upper end of the fixed ring 21 is fixedly connected to the fermentation tank 1, and the lower end of the fixed ring 21 is fixedly connected to the storage tank 15. Two cover plates 22 are symmetrically fixedly connected to the upper and lower ends of the annular inner surface of the fixed ring 21. A plurality of movable blocks 23 are movably connected between the two cover plates 22. The plurality of movable blocks 23 are distributed in an annular structure. The outer surface of the screw 14 fits the movable block 23. A plurality of slide grooves 24 are provided on the annular outer surface of the movable block 23 close to the fixed ring 21. The inner part of the slide groove 24 is slidably connected to a connecting rod 25, the side of the connecting rod 25 away from the slide groove 24 is fixedly connected with a movable ring 26, and the movable ring 26 is movably connected to the fixed ring 21. The outer surface of the connecting rod 25 is sleeved with a spring 27, one side of the spring 27 is fixedly connected to the movable ring 26, and the other side of the spring 27 is fixedly connected to the movable block 23. The upper end outer surface of the movable block 23 is provided with a first arc groove 28 on the side close to the fixed ring 21, and the annular inner surface of the fixed ring 21 is fixedly connected with a plurality of first arc blocks 211. The right side of the annular outer surface of the movable ring 26 is fixedly connected with a turning handle 29, and the side of the turning handle 29 away from the movable ring 26 penetrates the fixed ring 21 and extends to the outside of the fixed ring 21, and the outer surface of the fixed ring 21 is provided with a movable groove 20 near the turning handle 29.

[0039] Since the stirring range of the heat exchange stirring device is limited, the fermentation raw materials in the fermentation tank 1 will settle and accumulate at the bottom of the tank due to gravity, making it difficult for the raw materials accumulated at the bottom of the tank to fully contact with the microorganisms, affecting the production yield of biogas. Since the waste liquid and waste residue after fermentation can be used as fertilizers in agriculture, but the fermented straw waste residue is not convenient to discharge, and after discharge, the staff must carry it to other devices for crushing and processing, which is time-consuming and labor-intensive, reducing the practicality of the device. The present invention provides a stirring rod 13, firstly adds the straw raw materials and other fermentation raw materials into the fermentation tank 1 through the feed inlet, starts the motor 11, and the motor 11 The rotation drives the main rod 12 and the stirring rod 13 to rotate. Under the stirring action of the stirring rod 13, the microorganisms are fully in contact with the straw raw materials, thereby improving the biogas production yield. When the main rod 12 rotates, it drives the screw 14 to rotate, so that the raw materials accumulated at the bottom of the tank move upward along the screw groove. By setting the separation mechanism 2, after the fermentation is completed, when the waste residue needs to be discharged, the motor 11 is turned off, and the movable ring 26 is rotated by turning the handle 29, thereby driving the connecting rod 25 to rotate, and at the same time, the movable block 23 is rotated. When the movable block 23 rotates to the first arc groove 28 and the first arc block 2 When the positions of the movable block 23 and the movable groove 20 correspond, the movable block 23 moves toward the movable ring 26 under the action of the spring 27, and the movable ring 26 is rotated until the movable block 23 and the movable groove 20 are fitted together, and the movable block 23 and the screw 14 are separated from each other, so that the fitting part of the movable block 23 and the screw 14 is opened, and the motor 11 is started and the direction of the motor 11 is changed, so that the screw 14 rotates in another direction, so that the waste residue moves downward along the screw groove and enters the storage tank 15. After the waste residue is crushed by the screw 14 in the storage tank 15, the sealing door 18 is opened, and the screw 14 continues to rotate so that the crushed waste residue moves out of the storage tank 15 along the screw groove. To complete the discharging operation, the present invention cooperates with the screw 14 and the motor 11. The screw 14 rotates to drive the straw raw materials accumulated at the bottom of the fermentation tank 1 to move upward, so that the raw materials accumulated at the bottom of the tank can fully contact with the microorganisms, thereby improving the production yield of biogas. The separation mechanism 2 cooperates with the screw 14 to facilitate the transfer of waste residues in the fermentation tank 1 into the storage tank 15 and to crush and process it, thereby facilitating the discharging operation of the fermented straw waste residues. There is no need for the staff to transport the waste residues to other devices for crushing and processing, thereby saving labor and improving the practicability of the device.

[0040] As an embodiment of the present invention, Figure 5 As shown, a plurality of first through slots 212 are formed inside the cover plate 22, and a plurality of second through slots 213 are formed inside the movable block 23. The first through slots 212 and the second through slots 213 have the same inner diameter, and the first through slots 212 and the second through slots 213 are alternately arranged.

[0041] During operation, when the handle 29 is turned to open the joint between the movable block 23 and the screw 14, the waste liquid will flow into the storage tank 15, and the straw waste residue will flow out of the storage tank 15 together with the waste liquid. The waste liquid and the waste residue are mixed with each other, which makes it inconvenient to crush the straw waste residue. The present invention sets a first through groove 212 and a second through groove 213. After the fermentation is completed, the sealing door 18 is opened, and the handle 29 is turned to drive the movable block 23 to rotate to the position where the second through groove 213 corresponds to the first through groove 212, so that the waste liquid in the fermentation tank 1 flows out of the storage tank 15 through the first through groove 212 and the second through groove 213 to achieve solid-liquid separation. The present invention sets a first through groove 212 and a second through groove 213 to achieve solid-liquid separation of the waste, thereby facilitating the subsequent crushing of the straw waste residue.

[0042] As an embodiment of the present invention, Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the first arc block 211 is movably connected to a rolling mechanism 3 on one side close to the movable block 23;

[0043] The rolling mechanism 3 includes a fixed groove 31, a rotating rod 32, a ball 33 and a rolling groove 34. The fixed groove 31 is opened on the arc-shaped outer surface of the first arc block 211 close to the movable block 23. The rotating rod 32 is fixedly connected to the upper and lower ends of the inner surface of the fixed groove 31. The annular outer surface of the rotating rod 32 is movably connected to the ball 33. The rolling groove 34 is opened on the arc-shaped outer surface of the movable block 23 close to the first arc block 211. The ball 33 is rollingly connected to the rolling groove 34.

[0044] During operation, as the turning handle 29 drives the movable ring 26 and the movable block 23 to rotate, the movable block 23 and the first arc block 211 move relative to each other, thereby generating friction with the first arc block 211, making it difficult for the staff to turn the turning handle 29, and the first arc block 211 and the movable block 23 will be worn due to friction, affecting the normal use of the device. The present invention sets a rolling mechanism 3 and utilizes the rolling connection of the ball 33 and the rolling groove 34, thereby reducing the friction generated by the relative movement of the movable block 23 and the first arc block 211, making it easier for the staff to operate, and reducing the wear of the movable block 23 and the first arc block 211, thereby increasing the service life of the device.

[0045] As an embodiment of the present invention, Figures 5 to 7As shown, a second arc block 214 is fixedly connected to the center position of the upper end of the outer surface of one side of the first arc block 211 close to the movable block 23, a second arc groove 215 is provided at the connection between the two movable blocks 23 close to the second arc block 214, the second arc block 214 and the second arc groove 215 fit each other, a third arc groove 216 is provided on the outer surface of the upper end of the movable block 23 in the clockwise direction of the second arc groove 215, a fourth arc groove 217 is provided at the center position of the upper end of the arc inner surface of the first arc groove 28, and the third arc groove 216 and the fourth arc groove 217 are both matched with the second arc block 214.

[0046] Since the movable block 23 and the cover plate 22 are located inside the device, it is not convenient for the operator to observe, and it is difficult to improve the rotation of the handle 29 so that the first through groove 212 corresponds to the second through groove 213, thereby affecting the normal solid-liquid separation operation. In addition, due to the lack of a fixing mechanism between the movable block 23 and the first arc-shaped groove 28, it is easy for the movable block 23 to be affected by the screw 14 and rotate, thereby affecting the normal operation of the device. The present invention fixes the movable block 23 by fitting the second arc-shaped block 214 and the second arc-shaped groove 215 together, rotates the handle 29 to rotate the movable block 23, separates the second arc-shaped groove 215 from the second arc-shaped block 214, and continues to rotate the movable block 23 to make the third arc-shaped groove 216 and the second arc-shaped groove 216 fit together. The blocks 214 are engaged with each other, at this time, the first through groove 212 and the second through groove 213 correspond to each other, and when the movable block 23 continues to be rotated to make the fourth arc groove 217 and the second arc block 214 engage with each other, the first arc block 211 and the first arc groove 28 fit each other, and the connection between the movable block 23 and the screw 14 is open. The present invention fixes the movable block 23 by the mutual engagement of the second arc block 214 and the second arc groove 215 to prevent the movable block 23 from rotating due to the influence of the screw 14 and affecting the normal operation of the device. The second arc block 214 and the third arc groove 216 are engaged with each other to make the first through groove 212 and the second through groove 213 correspond to each other, so that the waste liquid can flow out, ensuring the normal solid-liquid separation operation.

[0047] As an embodiment of the present invention, Figure 3 and Figure 7 As shown, the corners on both sides of the first arc groove 28, the second arc groove 215, the third arc groove 216 and the fourth arc groove 217 are all designed with arc structures, and the annular outer surface of each movable block 23 is fixedly connected with three connecting rods 25, and the three connecting rods 25 are symmetrically distributed with the center of the annular outer surface of the movable block 23 as the midpoint.

[0048] During operation, the present invention designs the corners on both sides of the first arc groove 28, the second arc groove 215, the third arc groove 216 and the fourth arc groove 217 into an arc structure to prevent the first arc block 211 and the first arc groove 28 from being interlocked when the movable block 23 rotates. Similarly, the second arc block 214 and the second arc groove 215, the third arc groove 216, and the fourth arc groove 217 can also be prevented from being interlocked.

[0049] As an embodiment of the present invention, Figure 1 and Figure 4 As shown, a plurality of through holes 19 are provided inside the sealing door 18 , and filter screens are provided on the upper ends of the annular inner surfaces of the through holes 19 and the first through groove 212 .

[0050] During operation, by opening a through hole 19 inside the sealing door 18, the juice generated when the screw 14 crushes the straw waste can be filtered out, and by arranging a filter on the upper end of the annular inner surface of the through hole 19 and the first through groove 212, it can prevent the straw waste from entering the through hole 19 or the first through groove 212 and causing blockage.

[0051] Working principle: The present invention provides a stirring rod 13, firstly adds straw raw materials and other fermentation raw materials into the fermentation tank 1 through the feed port, starts the motor 11, and the motor 11 rotates to drive the main rod 12 and the stirring rod 13 to rotate. Under the stirring action of the stirring rod 13, the microorganisms are fully in contact with the straw raw materials, thereby improving the biogas production yield. While the main rod 12 rotates, it drives the screw 14 to rotate, so that the raw materials accumulated at the bottom of the tank move upward along the screw groove. By providing a separation mechanism 2, after the fermentation is completed, the sealing door 18 is opened, and the handle 29 is rotated to drive the movable block 23 to rotate to the position corresponding to the second through groove 213 and the first through groove 212, so that the waste liquid in the fermentation tank 1 flows out of the storage tank 15 through the first through groove 212 and the second through groove 213, so as to achieve solid-liquid separation. When it is necessary to discharge the waste residue, the motor 11 is turned off, and the sealing door 18 is closed at the same time. The movable ring 26 is rotated by turning the handle 29, thereby driving the connecting rod 25 to rotate and the movable block 23 to rotate at the same time. When the movable block 23 rotates to the position where the first arc groove 28 corresponds to the first arc block 211, the movable block 23 moves toward the movable ring 26 under the action of the spring 27, and the movable ring 26 is rotated until the movable block 23 and the movable groove 20 are in contact with each other. The movable block 23 and the screw 14 are separated from each other, so that the contact between the movable block 23 and the screw 14 is opened, the motor 11 is started and the direction of the motor 11 is changed, so that the screw 14 rotates in the other direction, so that the waste residue moves downward along the screw groove and enters the storage tank 15. After the waste residue is crushed by the screw 14 in the storage tank 15, the sealing door 18 is opened, and the screw 14 continues to rotate so that the crushed waste residue moves out of the storage tank 15 along the screw groove, completing the discharging operation. The model of the motor 11 is: Y80M1-2.

[0052] The electrical components appearing in this article are all connected to the external main controller and 220V AC power through a transformer, and the main controller can be a conventional known device that controls a computer, etc. The product model provided by the present invention is only used for the technical solution according to the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more matching and consistent with the technical solution of the present invention. It is a technical solution for the best application of the technical solution. The model of its product can be replaced and modified according to the required technical parameters, which is well known to technical personnel in this field. Therefore, technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plant straw biogas fermentation system, comprising a fermentation tank (1) and a motor (11), characterized in that: The lower end of the motor (11) passes through the upper end of the fermentation tank (1) and is fixedly connected to a main rod (12); a plurality of stirring rods (13) are fixedly connected to the annular outer surface of the main rod (12); a screw rod (14) is fixedly connected to the lower end of the main rod (12); a storage tank (15) is fixedly connected to the lower outer surface of the fermentation tank (1); a plurality of fixing rods (16) are fixedly connected to the bottom end of the annular inner surface of the storage tank (15); a fixing block (17) is fixedly connected to the side of the fixing rod (16) away from the storage tank (15); the lower end of the screw rod (14) is movably connected to the fixing block (17) via a bearing; a sealing door (18) is hingedly connected to the lower end of the storage tank (15); a partition mechanism (2) is provided between the fermentation tank (1) and the storage tank (15); The partition mechanism (2) comprises a fixed ring (21), a cover plate (22), a movable block (23), a slide groove (24), a connecting rod (25), a movable ring (26), a spring (27), a first arc-shaped groove (28), a turning handle (29), a movable groove (20) and a first arc-shaped block (211); the upper end of the fixed ring (21) is fixedly connected to the fermentation tank (1); the lower end of the fixed ring (21) is fixedly connected to the storage tank (15); two cover plates (22) are symmetrically fixedly connected at the upper and lower ends of the annular inner surface of the fixed ring (21); a plurality of movable blocks (23) are movably connected between the two cover plates (22); the plurality of movable blocks (23) are distributed in an annular structure; the outer surface of the screw rod (14) and the movable block (23) are in contact with each other; a plurality of slide grooves (24) are provided on the annular outer surface of the movable block (23) on one side close to the fixed ring (21); the inner part of the slide groove (24) is slidably connected with a connecting member. A rod (25), a side of the connecting rod (25) away from the slide groove (24) is fixedly connected with a movable ring (26), the movable ring (26) is movably connected to the fixed ring (21), the outer surface of the connecting rod (25) is sleeved with a spring (27), one side of the spring (27) is fixedly connected to the movable ring (26), the other side of the spring (27) is fixedly connected to the movable block (23), the upper end outer surface of the movable block (23) is provided with a first arc groove (28) on the side close to the fixed ring (21), the annular inner surface of the fixed ring (21) is fixedly connected with a plurality of first arc blocks (211), the right side of the annular outer surface of the movable ring (26) is fixedly connected with a turning handle (29), the side of the turning handle (29) away from the movable ring (26) passes through the fixed ring (21) and extends to the outside of the fixed ring (21), and the outer surface of the fixed ring (21) is provided with a movable groove (20) at a position close to the turning handle (29); The cover plate (22) is provided with a plurality of first through slots (212) inside, and the movable block (23) is provided with a plurality of second through slots (213) inside. The first through slots (212) and the second through slots (213) have the same inner diameter, and the first through slots (212) and the second through slots (213) are arranged alternately.

2. A plant straw biogas fermentation system according to claim 1, characterized in that: A rolling mechanism (3) is movably connected to one side of the first arc block (211) close to the movable block (23); the rolling mechanism (3) comprises a fixed groove (31), a rotating rod (32), a ball (33) and a rolling groove (34); the fixed groove (31) is provided on an arc-shaped outer surface of the first arc block (211) close to the movable block (23); the rotating rod (32) is fixedly connected to the inner surface of the fixed groove (31) at both upper and lower ends; the annular outer surface of the rotating rod (32) is movably connected to the ball (33); a rolling groove (34) is provided on an arc-shaped outer surface of the movable block (23) close to the first arc block (211); the ball (33) is rollingly connected to the rolling groove (34).

3. A plant straw biogas fermentation system according to claim 2, characterized in that: A second arc block (214) is fixedly connected to the center position of the upper end of the outer surface of one side of the first arc block (211) close to the movable block (23); a second arc groove (215) is provided at a position close to the second arc block (214) at the connection between the two movable blocks (23); the second arc block (214) and the second arc groove (215) are fitted with each other; a third arc groove (216) is provided on the outer surface of the upper end of the movable block (23) in the clockwise direction of the second arc groove (215); a fourth arc groove (217) is provided at the center position of the upper end of the arc inner surface of the first arc groove (28); the third arc groove (216) and the fourth arc groove (217) are matched with the second arc block (214).

4. A plant straw biogas fermentation system according to claim 3, characterized in that: The corners on both sides of the first arc groove (28) and the second arc groove (215) are both designed as arc structures, and the annular outer surface of each movable block (23) is fixedly connected to three connecting rods (25), and the three connecting rods (25) are symmetrically distributed with the center of the annular outer surface of the movable block (23) as the midpoint.

5. A plant straw biogas fermentation system according to claim 1, characterized in that: A plurality of through holes (19) are provided inside the sealing door (18), and filter screens are provided on the upper ends of the annular inner surfaces of the through holes (19) and the first through groove (212).

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