Anaerobic biochemical sewage treatment device

Abstract

The utility model relates to the field of sewage treatment, in particular to an anaerobic biochemical sewage treatment device which comprises a main body mechanism, a water distribution mechanism and a filtering mechanism, the water distribution mechanism is fixedly mounted at the bottom of the inner side of the main body mechanism, and the water distribution mechanism is used for uniformly adding biochemical sewage into the main body mechanism; the filtering mechanism is fixedly installed at the top end of the left side of the main body mechanism and used for filtering sewage discharged after treatment, the water distribution mechanism comprises a water distribution cover and a cleaning mechanism, the water distribution cover is fixedly installed at the bottom of the inner side of the main body mechanism, and the cleaning mechanism is fixedly installed at the bottom of the inner side of the main body mechanism. According to the anaerobic biochemical sewage treatment device, through the arrangement of the cleaning mechanism, when sewage enters the shell, a baffle is impacted to drive a stirring shaft to rotate, so that the sewage at the bottom of the inner side of the tower body is stirred, and meanwhile, a cleaning rod is driven to rotate, so that an insertion block is inserted into a water distribution hole, and the water distribution hole is prevented from being blocked; the use effect of the treatment device is improved.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to an anaerobic biochemical sewage treatment device. Background Art

[0002] Anaerobic biochemical treatment is a sewage treatment method that uses anaerobic microorganisms to decompose organic pollutants under anaerobic conditions. The basic principle of anaerobic biochemical treatment is to convert organic pollutants into gases such as methane and carbon dioxide and stable sludge through the metabolism of anaerobic microorganisms in an anaerobic environment. Anaerobic microorganisms mainly include fermentation bacteria, hydrogen-producing and acetic acid-producing bacteria, and methanogenic bacteria. These microorganisms play different roles at different stages and jointly complete the decomposition process of organic pollutants.

[0003] Existing anaerobic biochemical sewage treatment is generally carried out through anaerobic towers. The pretreated sewage will be evenly transported to the inside of the anaerobic tower through a water distributor. Under the action of the first and second level three-phase separators, a certain amount of biogas will be generated and transported to the gas-liquid separator through the gas collecting pipe for biogas discharge. At the same time, the sewage after the sludge and biogas are separated will be discharged after anaerobic operation.

[0004] However, considering that the water distribution holes on the water distributor of the existing anaerobic biochemical sewage treatment device are easily blocked by the sludge in the sewage during use, resulting in uneven water distribution and reduced reaction efficiency, and the sludge in the sewage is easily settled at the bottom of the anaerobic tower, which is not convenient for sufficient mixing of the incoming water, affecting the growth and metabolic efficiency of microorganisms, resulting in reduced sewage treatment effect. Utility Model Content

[0005] The purpose of the utility model is to provide an anaerobic biochemical sewage treatment device.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Provided is an anaerobic biochemical sewage treatment device, comprising a main body mechanism, a water distribution mechanism, and a filtering mechanism. The water distribution mechanism is fixedly mounted on the inner bottom of the main body mechanism, and is used to evenly add biochemical sewage into the main body mechanism. The filtering mechanism is fixedly mounted on the left top of the main body mechanism, and is used to filter the sewage discharged after treatment. The water distribution mechanism comprises a water distribution cover and a cleaning mechanism. The water distribution cover is fixedly mounted on the inner bottom of the main body mechanism, and the cleaning mechanism is fixedly mounted on the inner bottom of the main body mechanism. The cleaning mechanism is used to clean the water distribution cover to prevent the water distribution cover from being blocked. The cleaning mechanism comprises a cleaning rod, a stirring shaft, a shell, an insert, a spring, and a baffle. The shell is fixedly mounted on the inner bottom of the main body mechanism, the stirring shaft penetrates and is rotatably connected to the top inner wall of the shell, the baffle is fixedly mounted on the bottom end of the stirring shaft, the cleaning rod is fixedly mounted on the top end of the stirring shaft, one end of the spring is fixedly connected to the inner side of the cleaning rod, and the other end of the spring is fixedly connected to the outer wall of the insert.

[0008] Furthermore, the main structure includes a tower body, a three-phase separator and a gas-liquid separator. The inner bottom of the tower body is fixedly connected to the bottom of the water distribution hood, the inner bottom of the tower body is fixedly connected to the inner bottom of the shell, the three-phase separator is fixedly installed on the inner side of the tower body, and the gas-liquid separator is fixedly installed on the top of the tower body.

[0009] Furthermore, the main structure also includes an air collecting pipe, a water inlet pipe, a sewage pipe and a drain pipe. The right end of the water inlet pipe passes through the inner wall of the left bottom end of the tower body and is fixedly installed on the left end of the shell. The sewage pipe is fixedly installed on the right end of the bottom of the tower body. The drain pipe is fixedly installed on the left top end of the tower body. The air collecting pipe is fixedly installed on the inner wall of the top end of the tower body and passes through the tower body, the gas-liquid separator and the three-phase separator.

[0010] Furthermore, the filtering mechanism includes a filter box, movable plate one, movable plate two, a telescopic rod, a filter plate and an output pipe. The filter box is fixedly installed on the top left side of the tower body, the top right end of the filter box is fixedly connected to the bottom end of the drain pipe, the movable plate one is slidably installed on the inner right end of the filter box, the movable plate two is slidably installed on the inner left end of the filter box, one end of the telescopic rod is hinged to the left end of the movable plate one, the other end of the telescopic rod is hinged to the right end of the movable plate two, the telescopic rod is rotatably installed on the inner side of the filter box, the bottom of the filter plate is plugged into the inner side of the movable plate two, the output pipe is fixedly installed on the left side of the filter box, and the filter plate is plugged into the top inner wall of the filter box.

[0011] Furthermore, the filter mechanism also includes a connecting plate, a wedge, a guide column and a return spring. A groove is provided on the top inner wall of the filter box. The connecting plate can be slidably installed on the inner side of the groove. The wedge is fixedly installed on the front side of the connecting plate. The guide column is fixedly installed on the inner side of the groove. One end of the return spring is fixedly connected to the inner side of the groove. The other end of the return spring is fixedly installed on the back side of the connecting plate. A slot is provided on the top of the outer wall of the filter plate.

[0012] Furthermore, the inner side of the connecting plate is slidably connected to the outer wall of the guide column, the outer wall of the wedge block is slidably connected to the inner side of the groove, and the outer wall of the wedge block is clamped to the inner wall of the clamping groove.

[0013] Furthermore, the water distribution mechanism also includes a delivery pipe, which passes through the gas-liquid separator, tower body, three-phase separator and water distribution cover, and is fixedly installed on the inner walls of the gas-liquid separator, tower body, three-phase separator and water distribution cover.

[0014] Furthermore, the cleaning mechanism also includes a water outlet pipe, which is fixedly installed at the right end of the shell, the stirring shaft and the top inner wall of the water distribution hood are penetrated and rotatably connected, the outer wall of the baffle is slidably connected to the inner side of the shell, and the outer wall of the water distribution hood is provided with multiple groups of water distribution holes, the plug block is slidably connected to the inner side of the cleaning rod, and the plug block is plugged into the inner side of the water distribution hole.

[0015] The beneficial effects of the present invention are as follows: the anaerobic biochemical sewage treatment device, through the setting of the cleaning mechanism, when sewage enters the shell, it will impact the baffle and drive the stirring shaft to rotate, thereby stirring the sewage at the bottom inner side of the tower body, and at the same time drive the cleaning rod to rotate, so that the plug block is plugged into the water distribution hole, avoiding the blockage of the water distribution hole and improving the use effect of the treatment device. In addition, through the setting of the filtering mechanism, the discharged sewage is further filtered and treated, thereby reducing the situation where sludge is discharged with the sewage, and can facilitate the staff to check the filter plate and check the degree of sludge leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the tower body of the utility model in an open state;

[0019] Figure 3 This is a schematic diagram of the main structure of the cleaning mechanism of the present utility model;

[0020] Figure 4 This is a schematic diagram of the disassembled structure of the cleaning rod of the utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the shell of the present utility model;

[0022] Figure 6 This is a schematic structural diagram of the filter box of the utility model in an open state;

[0023] Figure 7This is a schematic diagram of the disassembly structure of the connecting plate and the filter box of the utility model;

[0024] Figure 8 For the utility model Figure 7 A schematic diagram of the enlarged structure of part A.

[0025] In the figure: 1. Main body; 11. Tower body; 12. Three-phase separator; 13. Gas-liquid separator; 14. Gas collecting pipe; 15. Water inlet pipe; 16. Sewage pipe; 17. Drain pipe; 2. Water distribution mechanism; 21. Water distribution cover; 22. Delivery pipe; 23. Cleaning mechanism; 231. Cleaning rod; 232. Agitator shaft; 233. Shell; 234. Water outlet pipe; 235. Insert; 236. Spring; 237. Baffle; 3. Filter mechanism; 31. Filter box; 32. Movable plate 1; 33. Movable plate 2; 34. Telescopic rod; 35. Filter plate; 36. Connecting plate; 37. Wedge; 38. Guide column; 39. Return spring; 310. Output pipe. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0027] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] Reference Figures 1 to 2 , an anaerobic biochemical sewage treatment device shown in FIG, includes a main body mechanism 1, a water distribution mechanism 2, and a filtering mechanism 3. The water distribution mechanism 2 is fixedly installed at the inner bottom of the main body mechanism 1. The water distribution mechanism 2 is used to evenly add biochemical sewage into the main body mechanism 1, and the water distribution mechanism 2 is used to improve the mixing uniformity and reaction efficiency. The filtering mechanism 3 is fixedly installed at the left top of the main body mechanism 1. The filtering mechanism 3 is used to filter the treated sewage, thereby reducing the sludge from being discharged along with the discharged sewage, making it convenient for the staff to check the sludge running situation in time. The water distribution mechanism 2 includes a water distribution cover 21 and a cleaning mechanism 23. The water distribution cover 21 is fixedly installed at the inner bottom of the main body mechanism 1. The water distribution cover 21 is conical. The cleaning mechanism 23 is fixedly installed at the inner bottom of the main body mechanism 1. The cleaning mechanism 23 is used to clean the water distribution cover 21 to prevent the water distribution cover 21 from being blocked, and at the same time, it can stir and mix the substrate of the tower body 11 to prevent the sludge from settling.

[0029] Reference Figures 3 to 5The cleaning mechanism 23 includes a cleaning rod 231, a stirring shaft 232, a shell 233, an insert 235, a spring 236, and a baffle 237. The shell 233 is fixedly installed at the inner bottom of the main body mechanism 1. The stirring shaft 232 penetrates and is rotatably connected to the top inner wall of the shell 233. A plurality of stirring rods are provided on the stirring shaft 232, and the length of the stirring rods gradually decreases from bottom to top. Through the rotation effect of the stirring shaft 232, the plurality of stirring rods are driven to fully stir and mix the substrate of the tower body 11, and the cleaning rod 231 can be driven to rotate. The baffle 237 is fixedly installed at the bottom end of the stirring shaft 232. The baffle 237 is fixedly installed at the bottom end of the stirring shaft 232. There are multiple groups distributed in the annular array. The cleaning rod 231 is fixedly installed on the top of the stirring shaft 232. Through the rotation effect of the cleaning rod 231, the multiple groups of plug blocks 235 are driven to move, so that the multiple groups of plug blocks 235 can correspond to the multiple groups of water distribution holes. One end of the spring 236 is fixedly connected to the inner side of the cleaning rod 231, and the other end of the spring 236 is fixedly connected to the outer wall of the plug block 235. There are multiple groups of springs 236 and plug blocks 235. Through the elastic force of the spring 236, the plug block 235 always maintains the plug-in effect with the water distribution hole without being affected by external force, thereby cleaning the sludge in the water distribution hole.

[0030] Reference Figure 1 and Figure 2 The main body 1 includes a tower body 11, a three-phase separator 12 and a gas-liquid separator 13. The inner bottom of the tower body 11 is fixedly connected to the bottom of the water distribution cover 21. A climbing frame is provided at the left rear end of the tower body 11 to facilitate the staff to climb to the top of the tower body 11 and replace the filter plate 35. The inner bottom of the tower body 11 is fixedly connected to the inner bottom of the shell 233. The three-phase separator 12 is fixedly installed on the inner side of the tower body 11. There are two groups of three-phase separators 12 symmetrically distributed, which are convenient for primary and secondary three-phase separation of sewage, thereby realizing the separation of sewage, sludge and biogas. The gas-liquid separator 13 is fixedly installed on the top of the tower body 11. A biogas discharge pipe is provided on the top of the gas-liquid separator 13. Through the gas-liquid separator 13, it is convenient to separate part of the liquid carried in the biogas, so that the biogas is discharged through the biogas discharge pipe, and the muddy water enters the bottom of the tower body 11 along the delivery pipe 22 and mixes with the inlet water.

[0031] Reference Figure 1 and Figure 2The main body 1 also includes an air collecting pipe 14, a water inlet pipe 15, a sewage pipe 16 and a drainage pipe 17. The right end of the water inlet pipe 15 passes through the inner wall of the left bottom end of the tower body 11 and is fixedly installed at the left end of the shell 233. Through the water inlet pipe 15, the sewage enters the shell 233 and impacts the multiple groups of baffles 237, thereby driving the stirring shaft 232 to rotate. Then the sewage enters the output pipe 310 through the shell 233. The sewage pipe 16 is fixedly installed at the right end of the bottom of the tower body 11. Pipe 16 is used to discharge the sludge in the tower body 11. The drain pipe 17 is fixedly installed at the top left side of the tower body 11. The treated sewage in the tower body 11 is discharged into the filter box 31 through the drain pipe 17. The gas collecting pipe 14 is fixedly installed on the inner wall of the top of the tower body 11 and passes through the tower body 11, the gas-liquid separator 13 and the three-phase separator 12. When the sewage in the tower body 11 reacts, a large amount of biogas will be generated, thereby generating a gas lift phenomenon, so that the biogas is transported to the gas-liquid separator 13 through the gas collecting pipe 14.

[0032] Reference Figure 1 and 6 The filtering mechanism 3 includes a filter box 31, a movable plate 1 32, a movable plate 2 33, a telescopic rod 34, a filter plate 35 and an output pipe 310. The filter box 31 is fixedly mounted on the left top end of the tower body 11. The discharged sewage is further filtered through the filter box 31. The top right end of the filter box 31 is fixedly connected to the bottom end of the drain pipe 17. The movable plate 1 32 is slidably mounted on the inner right end of the filter box 31, and the movable plate 2 33 is slidably mounted on the inner left end of the filter box 31. The movable plate 1 32 and the movable plate 2 33 are staggered and arranged to fix the filter plate 35. One end of the telescopic rod 34 is hinged to the left end of the movable plate 1 32, and the other end of the telescopic rod 34 is hinged to the right end of the movable plate 2 33. When the movable plate 1 32 or the movable plate 2 33 moves, it can drive the telescopic rod 34 to rotate. The cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam 35 is in the process of being moved, and the cam

[0033] Reference Figures 6 to 8The filter mechanism 3 also includes a connecting plate 36, a wedge 37, a guide column 38 and a reset spring 39. The top inner wall of the filter box 31 is provided with a groove, and the groove is symmetrically distributed in two groups. The connecting plate 36 is slidably installed on the inner side of the groove. The connecting plate 36 is symmetrically distributed in two groups. The sliding effect of the connecting plate 36 drives the wedge 37 to move. The wedge 37 is fixedly installed on the front side of the connecting plate 36. Two groups of wedges 37 are symmetrically distributed on each group of connecting plates 36. The guide column 38 is fixedly installed on the inner side of the groove. Two groups of guide columns 38 are provided in each group of grooves. The connecting plate 3 is adjusted by the guide column 38. 6 plays a guiding role to prevent the connecting plate 36 from deflecting when moving. One end of the return spring 39 is fixedly connected to the inner side of the groove, and the other end of the return spring 39 is fixedly installed on the back of the connecting plate 36. Two groups of return springs 39 are symmetrically distributed on each group of connecting plates 36. Through the elastic force of the return spring 39, the connecting plate 36 always keeps moving in the direction close to the filter plate 35 without being affected by external forces, so that the wedge block 37 always keeps the clamping effect with the clamping groove, thereby limiting the filter plate 35. A clamping groove is opened at the top of the outer wall of the filter plate 35, and there are two groups of clamping grooves symmetrically distributed.

[0034] Reference Figures 6 to 8 When the filter plate 35 is replaced, the filter box 35 is fixed to the movable plate 1 32 or the movable plate 2 33 through the top opening of the filter box 31, so that one set of wedges 37 are squeezed, thereby causing the connecting plate 36 to drive the other set of wedges 37 to release the limiting effect of the filter plate 35 to be removed, and at the same time, the filter plate 35 to be replaced is moved downward, so that the filter plate 35 to be removed is moved upward, which is convenient for the worker to remove. When the removal is completed, the wedge block 37 releases the squeezing effect, limits the replaced filter plate 35, and completes the replacement of the filter plate 35.

[0035] Reference Figure 3 and Figure 5The water distribution mechanism 2 also includes a delivery pipe 22, which passes through the gas-liquid separator 13, the tower body 11, the three-phase separator 12 and the water distribution cover 21, and is fixedly installed on the inner wall of the gas-liquid separator 13, the tower body 11, the three-phase separator 12 and the water distribution cover 21. The muddy water after separation in the gas-liquid separator 13 is delivered to the bottom of the tower body 11 through the delivery pipe 22, and is fully mixed with the incoming water to form an internal circulation. The cleaning mechanism 23 also includes a water outlet pipe 234, which is fixedly installed at the right end of the shell 233, and the sewage in the shell 233 is discharged to the tower body through the water outlet pipe 234. 11, the bottom of the stirring shaft 232 and the top inner wall of the water distribution cover 21 pass through and are rotatably connected, the outer wall of the baffle 237 is slidably connected to the inner side of the shell 233, and the sliding effect of multiple groups of baffles 237 drives the stirring shaft 232 to form a rotation effect. The outer wall of the water distribution cover 21 is provided with multiple groups of water distribution holes, and the plug block 235 is slidably connected to the inner side of the cleaning rod 231. The plug block 235 is plugged into the inner side of the water distribution hole. When the cleaning rod 231 rotates, it can drive multiple groups of plug blocks 235 to rotate at the same time, so that the plug block 235 is reciprocated and plugged into the multiple groups of water distribution holes, thereby preventing the water distribution holes from being blocked by sludge.

[0036] The anaerobic biochemical sewage treatment device is provided with a cleaning mechanism. When sewage enters the shell, it will impact the baffle and drive the stirring shaft to rotate, thereby stirring the sewage at the bottom of the inner side of the tower body, and at the same time drive the cleaning rod to rotate, so that the plug block is plugged into the water distribution hole, avoiding the water distribution hole from being blocked, and improving the use effect of the treatment device. In addition, the setting of the filtering mechanism allows the discharged sewage to be further filtered, thereby reducing the situation where sludge is discharged with the sewage, and making it convenient for staff to check the filter plate and the degree of sludge leakage.

[0037] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting but are provided for ease of description only.

Claims

1. An anaerobic biochemical sewage treatment device, characterized in that: The invention comprises a main body (1), a water distribution mechanism (2), and a filtering mechanism (3). The water distribution mechanism (2) is fixedly mounted on the inner bottom of the main body (1). The water distribution mechanism (2) is used to uniformly add biochemical sewage into the main body (1). The filtering mechanism (3) is fixedly mounted on the left top of the main body (1). The filtering mechanism (3) is used to filter the sewage discharged after treatment. The water distribution mechanism (2) comprises a water distribution cover (21) and a cleaning mechanism (23). The water distribution cover (21) is fixedly mounted on the inner bottom of the main body (1). The cleaning mechanism (23) is fixedly mounted on the inner bottom of the main body (1). The cleaning mechanism (23) is used to clean the water distribution cover (21) to avoid The cloth-free water cover (21) is clogged, and the cleaning mechanism (23) includes a cleaning rod (231), a stirring shaft (232), a shell (233), an insert (235), a spring (236), and a baffle (237). The shell (233) is fixedly mounted on the inner bottom of the main body mechanism (1), the stirring shaft (232) and the top inner wall of the shell (233) penetrate and are rotatably connected, the baffle (237) is fixedly mounted on the bottom end of the stirring shaft (232), the cleaning rod (231) is fixedly mounted on the top end of the stirring shaft (232), one end of the spring (236) is fixedly connected to the inner side of the cleaning rod (231), and the other end of the spring (236) is fixedly connected to the outer wall of the insert (235).

2. The anaerobic biochemical sewage treatment device according to claim 1, characterized in that: The main structure (1) includes a tower body (11), a three-phase separator (12), and a gas-liquid separator (13); the inner bottom of the tower body (11) is fixedly connected to the bottom of the water distribution cover (21); the inner bottom of the tower body (11) is fixedly connected to the inner bottom of the shell (233); the three-phase separator (12) is fixedly installed on the inner side of the tower body (11); and the gas-liquid separator (13) is fixedly installed on the top of the tower body (11).

3. The anaerobic biochemical sewage treatment device according to claim 2, characterized in that: The main structure (1) further includes an air collecting pipe (14), a water inlet pipe (15), a sewage pipe (16) and a drainage pipe (17). The right end of the water inlet pipe (15) passes through the inner wall of the left bottom end of the tower body (11) and is fixedly installed on the left end of the shell (233). The sewage pipe (16) is fixedly installed on the right end of the bottom of the tower body (11). The drainage pipe (17) is fixedly installed on the left top end of the tower body (11). The air collecting pipe (14) is fixedly installed on the inner wall of the top end of the tower body (11) and passes through the tower body (11), the gas-liquid separator (13) and the three-phase separator (12).

4. The anaerobic biochemical sewage treatment device according to claim 1, characterized in that: The filter mechanism (3) includes a filter box (31), a movable plate 1 (32), a movable plate 2 (33), a telescopic rod (34), a filter plate (35) and an output pipe (310). The filter box (31) is fixedly mounted on the top left side of the tower body (11). The top right end of the filter box (31) is fixedly connected to the bottom end of the drain pipe (17). The movable plate 1 (32) is slidably mounted on the inner right end of the filter box (31). The movable plate 2 (33) is slidably mounted on the filter box. (31), one end of the telescopic rod (34) is hinged to the left end of the movable plate 1 (32), and the other end of the telescopic rod (34) is hinged to the right end of the movable plate 2 (33). The telescopic rod (34) is rotatably installed on the inner side of the filter box (31), and the bottom of the filter plate (35) is plugged into the inner side of the movable plate 2 (33). The output pipe (310) is fixedly installed on the left side of the filter box (31), and the filter plate (35) is plugged into the top inner wall of the filter box (31).

5. The anaerobic biochemical sewage treatment device according to claim 4, characterized in that: The filter mechanism (3) further comprises a connecting plate (36), a wedge (37), a guide post (38) and a return spring (39). A groove is provided on the top inner wall of the filter box (31). The connecting plate (36) is slidably mounted on the inner side of the groove. The wedge (37) is fixedly mounted on the front side of the connecting plate (36). The guide post (38) is fixedly mounted on the inner side of the groove. One end of the return spring (39) is fixedly connected to the inner side of the groove. The other end of the return spring (39) is fixedly mounted on the back side of the connecting plate (36). A slot is provided on the top of the outer wall of the filter plate (35).

6. The anaerobic biochemical sewage treatment device according to claim 5, characterized in that: The inner side of the connecting plate (36) is slidably connected to the outer wall of the guide column (38), the outer wall of the wedge block (37) is slidably connected to the inner side of the groove, and the outer wall of the wedge block (37) is clamped to the inner wall of the clamping groove.

7. The anaerobic biochemical sewage treatment device according to claim 1, characterized in that: The water distribution mechanism (2) further includes a delivery pipe (22), which passes through the gas-liquid separator (13), the tower body (11), the three-phase separator (12), and the water distribution cover (21), and is fixedly mounted on the inner walls of the gas-liquid separator (13), the tower body (11), the three-phase separator (12), and the water distribution cover (21).

8. The anaerobic biochemical sewage treatment device according to claim 1, characterized in that: The cleaning mechanism (23) further includes a water outlet pipe (234), which is fixedly mounted on the right end of the shell (233), the stirring shaft (232) penetrates and is rotatably connected to the top inner wall of the water distribution cover (21), the outer wall of the baffle (237) is slidably connected to the inner side of the shell (233), the outer wall of the water distribution cover (21) is provided with a plurality of water distribution holes, the plug block (235) is slidably connected to the inner side of the cleaning rod (231), and the plug block (235) is plugged into the inner side of the water distribution hole.

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