A simple anaerobic bioreactor

Abstract

The present invention discloses a simple anaerobic bioreactor, which relates to the field of environmental bioengineering technology, including a cover plate, a reaction chamber, a water inlet pipe, a fixed chamber, a sealing cover, a fixed pipe, and a nozzle; a suction chamber coaxially connected to the lower end surface of the sealing cover, the lower end of the suction chamber slidingly passes through the bottom of the fixed chamber, and a suction unit is provided in the suction chamber. When the suction chamber rotates, the suction unit is alternately connected with a plurality of the fixed pipes, and generates a suction force on the inside of the fixed pipes connected thereto. In the present invention, by providing a suction unit, the leachate and impurities inside the plurality of nozzles and the fixed pipes can be alternately sucked, so that the nozzles will not be blocked, and then the sucked leachate and impurities can fall into the anaerobic sludge in the reaction chamber through the suction chamber, avoiding the phenomenon of large differences in local spraying volume caused by the blockage of several nozzles.

Description

Technical Field

[0001] The invention relates to the technical field of environmental bioengineering, in particular to a simple anaerobic bioreactor. Background Art

[0002] Anaerobic treatment technology is a biological treatment method for organic waste. With the increasing attention paid to global energy shortages and greenhouse effects, the importance of renewable energy is becoming increasingly apparent. Anaerobic treatment technology can convert wastewater into renewable energy sources such as acetic acid, methane, and hydrogen, which can not only realize resource and energy utilization, but also reduce environmental pollution. Therefore, the development and research of anaerobic treatment technology and anaerobic reactors are becoming more and more numerous. With the continuous deepening of the research on the mechanism of anaerobic digestion and the rapid development of various high-efficiency anaerobic reactors, anaerobic treatment technology for wastewater has become one of the core technologies for resource and environmental protection. At the same time, anaerobic sewage treatment technology has been widely used in the treatment of high-concentration organic wastewater and difficult-to-degrade organic wastewater due to its low cost, stability and high efficiency.

[0003] The current anaerobic biological reaction equipment transports sewage to the water distributor of the equipment through a circulating pump, and multiple nozzles of the water distributor spray the sewage into the anaerobic sludge in the equipment, so that the anaerobic microorganisms in the anaerobic sludge come into contact with the sewage. Since the leachate in the sewage has a relatively complex composition and usually contains solid particles or flocculants, it is easy to clog the nozzles of the water distributor, resulting in large differences in the local sewage spraying amount, which in turn makes the water distribution effect unsatisfactory. Therefore, there is a need for an anaerobic bioreactor that can prevent the nozzles of the water distributor from being clogged. Summary of the invention

[0004] The object of the present invention is to provide a simple anaerobic bioreactor to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A simple anaerobic bioreactor comprises a reaction chamber in which anaerobic sludge is stored and a cover plate is provided on the top, wherein the reaction chamber stores anaerobic sludge and a water inlet pipe is provided on the periphery thereof, and further comprises:

[0007] A fixed bin vertically fixed to one end of the water inlet pipe penetrating into the reaction bin, the top of the fixed bin is open and connected to a sealing cover, the water inlet pipe is in communication with the fixed bin, a plurality of fixed pipes are horizontally fixed to the lower side of the periphery of the fixed bin, the fixed pipes are in communication with the fixed bin, and a plurality of nozzles with downward openings are arranged on the periphery of the fixed pipes;

[0008] A suction bin is coaxially connected to the lower end surface of the sealing cover, and the lower end of the suction bin slides out of the bottom of the fixed bin. A suction unit is provided in the suction bin. When the suction bin rotates, the suction unit is alternately connected with multiple fixed tubes and generates a suction force on the inside of the fixed tubes connected with it.

[0009] Furthermore, a connecting shaft is coaxially fixed to the top of the suction bin, and the upper end of the connecting shaft slides through the sealing cover and the cover plate in sequence, and one end of the connecting shaft passing through the cover plate is fixedly sleeved with a driven pulley, and a motor is installed on the outer wall of the reaction bin, and the motor shaft of the motor is fixedly sleeved with a driving pulley, and the driving pulley and the driven pulley are connected by a V-belt transmission.

[0010] Furthermore, a containment cover is fixedly connected to the periphery of the lower side of the suction bin, the longitudinal section of the containment cover is U-shaped, and the containment cover, the bottom wall of the inner cavity of the fixed bin, and the periphery of the suction bin form a connecting cavity, the periphery of the suction bin is provided with a suction port that passes through the connecting cavity, and the periphery of the suction bin and the inner cavity wall of the fixed bin form a water inlet cavity.

[0011] Furthermore, the suction unit includes a piston slidably engaged with the inner cavity of the suction bin, and the piston is driven by a lifting assembly to slide in the suction bin. A baffle cover is movably connected to the bottom of the suction bin, and the baffle cover and the piston are connected by a connecting assembly, so that when the piston moves upward, it drives the baffle cover to move upward and closes the lower side opening of the suction bin. A shielding assembly is provided on the upper end surface of the baffle cover, and the shielding assembly is used to shield the suction port after the upper end surface of the baffle cover and the bottom surface of the suction bin are out of contact with each other.

[0012] Furthermore, the lifting assembly includes a cylinder bracket connected to the top surface of the cover plate, a cylinder is vertically installed on the top of the cylinder bracket, a cylinder rod of the cylinder penetrates the connecting shaft and rotates freely, and an end of the cylinder rod of the cylinder is rotationally connected to the piston.

[0013] Furthermore, the shielding assembly includes an arc-shaped plate vertically fixed to the upper end surface of the blocking cover, the outer arc surface of the arc-shaped plate is in sliding contact with the inner cavity wall of the suction bin, and the outer arc surface of the arc-shaped plate is provided with a connecting port adapted to the suction port.

[0014] Furthermore, the connecting assembly includes a connecting rod coaxially connected to the lower end surface of the piston, the lower end of the connecting rod slidably penetrates the block cover, the lower end of the connecting rod is fixedly sleeved with a lower stop ring, and a first spring is wrapped around the periphery of the connecting rod, and the two ends of the first spring in the direction of elastic force elastically press against the lower stop ring and the block cover respectively.

[0015] Furthermore, an upper stop ring is fixedly sleeved on the periphery of the connecting rod, and the upper stop ring is used to limit the upward movement of the blocking cover.

[0016] Furthermore, an adjusting seat is connected to one end of the water inlet pipe away from the fixed bin, and a connecting seat is connected to one end of the adjusting seat facing away from the water inlet pipe. A sliding cavity is provided on an end surface of the adjusting seat facing the water inlet pipe, and a sliding block is coaxially slidably engaged in the sliding cavity. A cone portion is coaxially fixed to one end of the sliding block facing the connecting seat, and a cone groove matching the cone portion is provided in the adjusting seat, and the cone groove is connected to the sliding cavity. An adjusting cavity is enclosed between the periphery of the cone portion and the cone groove, a plurality of notch grooves are provided on the periphery of the sliding block, and an adjusting unit for driving the sliding block to slide in the sliding cavity is provided on the periphery of the suction bin.

[0017] Furthermore, the adjusting unit includes a hollow bracket fixedly installed in the sliding cavity, a push rod is horizontally fixedly connected to the end face of the sliding block, the push rod slidably penetrates the hollow bracket, and the end of the push rod away from the sliding block is inserted into the fixed bin by the water inlet pipe, the end of the push rod inserted into the fixed bin is rotatably connected to a roller, a locking ring is fixedly sleeved on the periphery of the suction bin, a protrusion is fixedly connected to the periphery of the locking ring, the protrusion is used in conjunction with the roller, the end of the push rod passing through the hollow bracket is fixedly sleeved on a limiting ring, a second spring is wrapped around the periphery of the push rod, and the two ends of the second spring in the direction of elastic force elastically press against the limiting ring and the hollow bracket respectively.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, by providing a suction unit, the leachate and impurities in multiple nozzles and fixed pipes can be alternately sucked, so that the nozzles will not be blocked, and then the sucked leachate and impurities can fall into the anaerobic sludge in the reaction chamber through the suction chamber, avoiding the phenomenon of large differences in local spraying volume caused by blockage of several nozzles;

[0020] 2. In the present invention, when the piston moves upward and drives the connecting rod to move upward, the blocking cover can block and seal the lower opening of the suction bin, so that the interior of the suction bin is a closed environment, so that the leachate and impurities in the fixed pipe and the nozzle can be sucked out better, and then the piston moves downward to make the blocking cover break away from the blocking and sealing state of the lower opening of the suction bin, so that the sucked leachate and impurities can fall into the anaerobic sludge from the opening of the suction bin;

[0021] 3. In the present invention, when the suction bin rotates, the roller contacts the protrusion, and the protrusion drives the push rod to move and drives the sliding block to move toward the connecting seat, thereby reducing the gap in the regulating cavity surrounded by the cone and the cone groove, so that when suction is performed on the inside of any fixed pipe, the sewage flow rate entering the water inlet cavity from the water inlet pipe is reduced, thereby avoiding that when one of the fixed pipes is suctioned, the sewage flow rate in other fixed pipes is large, thereby resulting in a large spraying amount of the nozzle, increasing the impact force on the anaerobic sludge, and affecting the contact between the anaerobic sludge and the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a simple anaerobic bioreactor in the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the positional relationship after the middle part of the structure is cut open;

[0024] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0025] Figure 4 This is a schematic diagram of the positional relationship among the fixed bin, the fixed pipe and the water inlet pipe after assembly in the present invention;

[0026] Figure 5 for Figure 4 Schematic diagram of the positional relationship after the middle part of the structure is cut open;

[0027] Figure 6 for Figure 5 A magnified schematic diagram of the local structure at B in the middle;

[0028] Figure 7 for Figure 4 Schematic diagram of the explosion decomposition of the structure;

[0029] Figure 8 It is a schematic diagram of the positional relationship between the push rod and the adjustment seat after assembly in the present invention;

[0030] Fig. 9 for Figure 8 Schematic diagram of the explosion decomposition of the structure;

[0031] Fig.10 for Figure 8 Schematic diagram of the positional relationship of some structures after being cut open from another perspective.

[0032] In the figure, the description of each figure mark is as follows: 1. reaction chamber; 2. motor; 3. cylinder; 4. cover plate; 5. push rod; 6. adjustment seat; 7. connecting seat; 8. suction chamber; 9. fixed chamber; 10. fixed pipe; 11. nozzle; 12. first spring; 13. water inlet pipe; 14. cone; 15. locking ring; 16. bump; 17. roller; 18. lower stop ring; 19. sealing cover; 20. piston; 21. connecting rod; 22. baffle cover; 23. upper stop ring; 24. connecting port; 25. suction port; 26. connecting cavity; 27. enclosure cover; 28. arc plate; 29. ​​water inlet cavity; 30. sliding cavity; 31. limit ring; 32. hollow bracket; 33. second spring; 34. sliding block; 35. notch groove; 36. adjusting cavity. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1 - Fig.10 The present invention provides a technical solution: a simple anaerobic bioreactor, comprising a reaction bin 1 with an open top, a cover plate 4 is installed on the top of the reaction bin 1, the cover plate 4 seals the inside of the reaction bin 1, and anaerobic sludge is stored inside the reaction bin 1, a water inlet pipe 13 is horizontally penetrated on the upper side of the periphery of the reaction bin 1, one end of the water inlet pipe 13 penetrating into the reaction bin 1 is vertically fixedly connected to a fixed bin 9, the top of the fixed bin 9 is open and connected with a sealing cover 19, the water inlet pipe 13 is connected to the fixed bin 9, four fixed pipes 10 are horizontally fixedly connected to the lower side of the periphery of the fixed bin 9, the four fixed pipes 10 are arranged in an axial array along the fixed bin 9, and the fixed pipes 10 are connected to the fixed bin 9, and a plurality of nozzles 11 with downward openings are evenly spaced along a straight line on the periphery of the fixed pipe 10;

[0035] A bearing is embedded in the lower end surface of the sealing cover 19, and a suction bin 8 is inserted in the inner ring of the bearing, so that the suction bin 8 is coaxially connected to the sealing cover 19, and the lower end of the suction bin 8 slides through the bottom of the fixed bin 9, and a connecting shaft is coaxially fixed to the top of the suction bin 8. The upper end of the connecting shaft slides through the sealing cover 19 and the cover plate 4 in turn, and one end of the connecting shaft that passes through the cover plate 4 is fixedly sleeved with a driven pulley, and a motor 2 is installed on the outer wall of the reaction bin 1. The motor shaft of the motor 2 is fixedly sleeved with a driving pulley, and the driving pulley and the driven pulley are connected through a V-belt transmission. The motor shaft of the motor 2 rotates, thereby driving the driving pulley to rotate. When the driving pulley rotates, it will be driven by the V-belt to drive the driven pulley to rotate, so that the connecting shaft can rotate and drive the suction bin 8 to rotate in the fixed bin 9;

[0036] The lower periphery of the suction bin 8 is fixedly connected with a baffle cover 27 (such as Figure 7 As shown in the figure, the longitudinal section of the enclosure cover 27 is U-shaped, and the enclosure cover 27 (three inner cavity walls) and the inner cavity bottom wall of the fixed bin 9 and the periphery of the suction bin 8 form a connecting cavity 26, and the periphery of the suction bin 8 is provided with a suction port 25 that penetrates the connecting cavity 26. The periphery of the suction bin 8 and the inner cavity wall of the fixed bin 9 form a water inlet cavity 29. The sewage that enters the fixed bin 9 through the water inlet pipe 13 will be stored in the water inlet cavity 29, and then flow into the multiple fixed pipes 10 respectively, and finally sprayed out by the multiple nozzles 11;

[0037] The inner cavity of the suction bin 8 is slidably engaged with a piston 20, the top surface of the cover plate 4 is connected to a cylinder bracket by screws, a cylinder 3 is vertically installed on the top of the cylinder bracket, the cylinder rod of the cylinder 3 penetrates the connecting shaft and rotates freely, the end of the cylinder rod of the cylinder 3 is rotatably connected to the piston 20, and then the cylinder rod of the cylinder 3 is extended and retracted, thereby driving the piston 20 to move up and down, and a stop cover 22 is movably connected to the bottom of the suction bin 8, and an arc plate 28 is vertically fixed to the upper end surface of the stop cover 22;

[0038] The outer arc surface of the arc plate 28 is in sliding contact with the inner cavity wall of the suction bin 8, and a connecting port 24 adapted to the suction port 25 is provided on the outer arc surface of the arc plate 28. In addition, a rubber layer can be provided on the outer surface of the arc plate 28 to improve the sealing performance between the outer arc surface of the arc plate 28 and the inner cavity wall of the suction bin 8. The lower end surface of the piston 20 is coaxially connected to a connecting rod 21, and a baffle 22 is slidably mounted on the lower end of the connecting rod 21. In addition, a plane is provided on the periphery of the connecting rod 21, and an anti-rotation portion adapted to the plane is provided on the inner hole of the baffle 22, so that the baffle 22 will not rotate on the connecting rod 21. A lower stop ring 18 is fixedly sleeved on the lower end of the connecting rod 21, and a first spring is sleeved around the periphery of the connecting rod 21. 12, the two ends of the first spring 12 in the elastic direction elastically press against the lower stop ring 18 and the stop cover 22 respectively, and the upper stop ring 23 is fixedly sleeved on the periphery of the connecting rod 21, and the upper stop ring 23 is used to limit the upward movement of the stop cover 22. When the piston 20 moves upward, it will drive the connecting rod 21 to move upward, and then the first spring 12 will generate an elastic pressing force on the stop cover 22, thereby driving the stop cover 22 to move upward until its upper end surface presses against the lower end surface of the suction bin 8, so that the interior of the suction bin 8 can be sealed, and as the piston 20 continues to move upward, the first spring 12 is compressible, so that the stop cover 22 will not interfere with the movement of the piston 20;

[0039] The end of the water inlet pipe 13 away from the fixed bin 9 is connected to the adjusting seat 6, and the end of the adjusting seat 6 facing away from the water inlet pipe 13 is connected to the connecting seat 7. A sliding cavity 30 is provided on the end surface of the adjusting seat 6 facing the water inlet pipe 13, and a sliding block 34 is coaxially slidably engaged in the sliding cavity 30. The end of the sliding block 34 facing the connecting seat 7 is coaxially fixed with the cone 14. A cone groove adapted to the cone 14 is provided in the adjusting seat 6, and the cone groove is connected with the sliding cavity 30. An adjusting cavity 36 is formed between the periphery of the cone 14 and the cone groove. A plurality of notch grooves 35 are provided on the periphery of the sliding block 34. The sewage entering the adjusting seat 6 from the connecting seat 7 will enter the notch groove 35 from the adjusting cavity 36, and then enter the sliding cavity 30 from the notch groove 35, and then enter the sliding cavity 30 by the sliding The cavity 30 enters the water inlet pipe 13, and a hollow bracket 32 ​​is fixedly installed in the sliding cavity 30. The end face of the sliding block 34 is horizontally fixedly connected with a push rod 5. The push rod 5 slidably penetrates the hollow bracket 32, and the end of the push rod 5 away from the sliding block 34 is inserted into the fixed bin 9 through the water inlet pipe 13. The end of the push rod 5 inserted into the fixed bin 9 is rotatably connected with the roller 17. The periphery of the suction bin 8 is fixedly sleeved with a locking ring 15, and the periphery of the locking ring 15 is fixedly connected with a protrusion 16, and the protrusion 16 is used in conjunction with the roller 17. The end of the push rod 5 that passes through the hollow bracket 32 ​​is fixedly sleeved with a limiting ring 31, and the periphery of the push rod 5 is sleeved with a second spring 33, and the two ends of the second spring 33 in the elastic force direction elastically press against the limiting ring 31 and the hollow bracket 32 ​​respectively.

[0040] Working principle of the present invention:

[0041] The external circulation pump transports the sewage containing leachate and impurities to the connecting seat 7, and then enters the inner cavity of the adjusting seat 6 from the inner cavity of the connecting seat 7, and then enters the adjusting cavity 36, and then enters the notched groove 35 and the sliding cavity 30 from the adjusting cavity 36 in sequence, and then enters the water inlet pipe 13 from the sliding cavity 30. The sewage entering the water inlet pipe 13 will be stored in the water inlet cavity 29 and enter the four fixed pipes 10, and then sprayed into the anaerobic sludge in the reaction chamber 1 by the nozzles 11 on the fixed pipes 10;

[0042] Start the motor 2, the motor shaft of the motor 2 rotates slowly, driving the active pulley to rotate. When the active pulley rotates, it will drive the driven pulley to rotate through the transmission of the V-belt, so that the connecting shaft can rotate and drive the suction bin 8 to rotate in the fixed bin 9, so that the enclosure cover 27 rotates alternately to each fixed pipe 10. When the three inner cavity walls of the enclosure cover 27 and the inner cavity bottom wall of the fixed bin 9 and the peripheral edge of the suction bin 8 form a connecting cavity 26 that is connected to the interior of one of the fixed pipes 10, the enclosure cover 27 can prevent the sewage in the water inlet cavity 29 from entering the fixed pipe 10. At this time, the interior of the fixed pipe 10 is only connected to the connecting cavity 26;

[0043] When the cylinder 3 is started, the cylinder rod of the cylinder 3 is shortened, and the piston 20 is driven to slide upward in the suction bin 8, so that the piston 20 drives the connecting rod 21 to move upward, and the first spring 12 generates an elastic force against the blocking cover 22, thereby driving the blocking cover 22 to move upward until its upper end surface abuts against the lower end surface of the suction bin 8, so that the interior of the suction bin 8 can be sealed, and at the same time, the connecting port 24 on the arc plate 28 coincides with and is connected with the suction port 25 on the outer wall of the suction bin 8. As the piston 20 continues to move upward, since the first spring 12 is compressible, the blocking cover 22 will not interfere with the movement of the piston 20, and the piston 20 moves upward and After the baffle 22 seals the lower opening of the suction bin 8, the air inside the fixed pipe 10 will enter the suction bin 8, thereby generating a negative pressure airflow. Under the action of the negative pressure airflow, the impurities originally blocked in the nozzle 11 will flow back to the fixed pipe 10 with the negative pressure airflow, and then enter the suction bin 8. Since the resistance of the impurities flowing back into the fixed pipe 10 is much smaller than the resistance of the nozzle 11 being ejected, the impurities blocked at the nozzle 11 can basically flow back to the suction bin 8. Since the top view structure of the enclosure cover 27 is fan-shaped, the connecting cavity 26 can still maintain communication with the inside of the fixed pipe 10 when the suction bin 8 rotates slowly.

[0044] At the same time, when the suction bin 8 rotates, the protrusion 16 rotates to contact the roller 17 and generates a thrust on the roller 17, so that the roller 17 drives the push rod 5 to move away from the reaction bin 1, and then the cone 14 moves toward the connecting seat 7, so that the gap of the adjustment chamber 36 is reduced, so that the sewage flow from the connecting seat 7 into the adjustment seat 6 is reduced, and at the same time, the limit ring 31 compresses the second spring 33 and makes the second spring 33 accumulate elastic potential energy, so that when one of the fixed pipes 10 is performing impurity suction, the sewage flow in the other three fixed pipes 10 will not suddenly increase, thereby causing a spray impact on the anaerobic sludge;

[0045] When the suction bin 8 rotates to the state where the connecting chamber 26 is disconnected from the fixed pipe 10, the cylinder rod of the cylinder 3 extends and causes the piston 20 to move in the opposite direction, thereby causing the baffle 22 to move downward. When the baffle 22 moves downward, the connecting port 24 and the suction port 25 are offset until the baffle 22 moves down into place, so that the arc plate 28 closes the suction port 25. At this time, the lower side opening of the suction bin 8 is open, and the leachate and impurities in the suction bin 8 will fall into the reaction bin 1 from the lower side opening of the suction bin 8. At this time, the protrusion 16 is separated from the rolling contact with the roller 17. Under the action of the elastic potential energy of the second spring 33, the push rod 5 drives the cone 14 to move in the opposite direction, so that the gap of the adjusting chamber 36 increases, so that the sewage in the water inlet chamber 29 can be sprayed out from the nozzles 11 on the four fixed pipes 10.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A simple anaerobic bioreactor, comprising a reaction chamber in which anaerobic sludge is stored and a cover plate is provided on the top, and a water inlet pipe is provided around the periphery of the reaction chamber, characterized in that: Also includes: A fixed bin is vertically fixed to one end of the water inlet pipe that penetrates into the reaction bin, the top of the fixed bin is open and connected to a sealing cover, the water inlet pipe is in communication with the fixed bin, a plurality of fixed pipes are horizontally fixed to the lower side of the periphery of the fixed bin, the fixed pipes are in communication with the fixed bin, and a plurality of nozzles with downward openings are arranged on the periphery of the fixed pipes; A suction bin is coaxially connected to the lower end surface of the sealing cover, and the lower end of the suction bin slides through the bottom of the fixed bin. A suction unit is arranged in the suction bin. When the suction bin rotates, the suction unit is alternately connected to a plurality of fixed pipes and generates a suction force on the inside of the fixed pipes connected thereto; A connecting shaft is coaxially fixedly connected to the top of the suction bin, and the upper end of the connecting shaft slides through the sealing cover and the cover plate in sequence, and one end of the connecting shaft passing through the cover plate is fixedly sleeved with a driven pulley, and a motor is installed on the outer wall of the reaction bin, and the motor shaft of the motor is fixedly sleeved with a driving pulley, and the driving pulley and the driven pulley are connected through a V-belt transmission; A baffle cover is fixedly connected to the periphery of the lower side of the suction bin, the longitudinal section of the baffle cover is U-shaped, and the baffle cover, the bottom wall of the fixed bin cavity, and the periphery of the suction bin form a connecting cavity, the periphery of the suction bin is provided with a suction port that passes through the connecting cavity, and the periphery of the suction bin and the inner cavity wall of the fixed bin form a water inlet cavity; The suction unit includes a piston that is slidably engaged with the inner cavity of the suction bin. The piston is driven by a lifting assembly to slide in the suction bin. A baffle cover is movably connected to the bottom of the suction bin. The baffle cover and the piston are connected by a connecting assembly, so that when the piston moves upward, it drives the baffle cover to move upward and closes the lower side opening of the suction bin. A shielding assembly is provided on the upper end surface of the baffle cover. The shielding assembly is used to shield the suction port after the upper end surface of the baffle cover and the bottom surface of the suction bin are out of contact with each other.

2. The simple anaerobic bioreactor according to claim 1, characterized in that: The lifting assembly comprises a cylinder bracket connected to the top surface of the cover plate, a cylinder is vertically installed on the top of the cylinder bracket, a cylinder rod of the cylinder penetrates the connecting shaft and rotates freely, and the end of the cylinder rod of the cylinder is rotationally connected to the piston.

3. The simple anaerobic bioreactor according to claim 1, characterized in that: The shielding component includes an arc-shaped plate vertically fixed to the upper end surface of the blocking cover, the outer arc surface of the arc-shaped plate is in sliding contact with the inner cavity wall of the suction bin, and the outer arc surface of the arc-shaped plate is provided with a connecting port adapted to the suction port.

4. The simple anaerobic bioreactor according to claim 1, characterized in that: The connecting assembly includes a connecting rod coaxially connected to the lower end surface of the piston, the lower end of the connecting rod slidably penetrates the baffle cover, the lower end of the connecting rod is fixedly sleeved with a lower stop ring, and a first spring is sleeved around the periphery of the connecting rod. The two ends of the first spring in the direction of elastic force elastically press against the lower stop ring and the baffle cover respectively.

5. The simple anaerobic bioreactor according to claim 4, characterized in that: An upper stop ring is fixedly sleeved on the periphery of the connecting rod, and the upper stop ring is used to limit the upward movement of the blocking cover.

6. The simple anaerobic bioreactor according to claim 1, characterized in that: An adjusting seat is connected to the end of the water inlet pipe away from the fixed bin, and a connecting seat is connected to the end of the adjusting seat facing away from the water inlet pipe. A sliding cavity is provided on the end face of the adjusting seat facing the water inlet pipe, and a sliding block is coaxially slidably engaged in the sliding cavity. A cone portion is coaxially fixed to the end of the sliding block facing the connecting seat, and a cone groove matching the cone portion is provided in the adjusting seat. The cone groove is connected to the sliding cavity, and the adjusting cavity is surrounded by the periphery of the cone portion and the cone groove. A plurality of notch grooves are provided on the periphery of the sliding block, and an adjusting unit for driving the sliding block to slide in the sliding cavity is provided on the periphery of the suction bin.

7. The simple anaerobic bioreactor according to claim 6, characterized in that: The adjusting unit includes a hollow bracket fixedly installed in the sliding cavity, a push rod is horizontally fixedly connected to the end face of the sliding block, the push rod slidably penetrates the hollow bracket, and the end of the push rod away from the sliding block is inserted into the fixed bin by the water inlet pipe, the end of the push rod inserted into the fixed bin is rotatably connected to the roller, a locking ring is fixedly sleeved on the periphery of the suction bin, a protrusion is fixedly connected to the periphery of the locking ring, the protrusion is used in conjunction with the roller, one end of the push rod passing through the hollow bracket is fixedly sleeved on a limiting ring, a second spring is wrapped around the periphery of the push rod, and the two ends of the second spring in the direction of elastic force elastically press against the limiting ring and the hollow bracket respectively.

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