CN221191842U

CN221191842U - Anaerobic tank for sewage treatment

Info

Publication number: CN221191842U
Application number: CN202322659390.0U
Authority: CN
Inventors: 王翔; 王飞; 师震岗; 颜雪苹; 王厚敏
Original assignee: Shandong Haisi Environmental Engineering Co ltd
Current assignee: Shandong Haisi Environmental Engineering Co ltd
Priority date: 2023-10-01
Filing date: 2023-10-01
Publication date: 2024-06-21
Anticipated expiration: 2033-10-01

Abstract

The utility model discloses an anaerobic tank for sewage treatment, which comprises a tank body, a water inlet pipe, a water outlet pipe, an oil-water separator mechanism, a stirring mechanism, an air outlet mechanism, a partition board and a cover board; the baffle plate is fixed in the box body, the box body is divided into an oil-water separation tank and an anaerobic tank, the bottom of the baffle plate is provided with a water pipe, and the water pipe is provided with a valve; the water inlet pipe is connected to the side wall of the tank body at one end of the oil-water separation tank, and the water outlet pipe is arranged on the side wall of the tank body, close to the bottom, of the anaerobic tank; the oil-water separation mechanism and the stirring mechanism are respectively arranged in the oil-water separation tank and the anaerobic tank; the cover plate is fixed at the top end of the box body through bolts, and the air outlet mechanism is arranged on the cover plate at one side of the anaerobic tank. The utility model can thoroughly separate oil from water, improve the fluidity of sewage, make sewage fully contact with anaerobic bacteria and react, and make sewage in the anaerobic tank be quickly and fully purified.

Description

Anaerobic tank for sewage treatment

Technical Field

The utility model belongs to the technical field of sewage treatment, and particularly relates to an anaerobic tank for sewage treatment.

Background

The anaerobic biological treatment technology is an efficient sewage treatment mode that organic matters in sewage are decomposed, metabolized and digested by anaerobic bacteria in an anaerobic state, so that the organic matter content in the sewage is greatly reduced, and methane is generated at the same time; however, in the process of discharging sewage, oil stains which are difficult to remove exist in the water, so that when the sewage is treated by anaerobic bacteria, the treatment efficiency of the anaerobic bacteria and the sewage is reduced, and the sewage treatment in the anaerobic tank is not facilitated.

Through retrieval, the anaerobic tank for sewage treatment with the patent number of CN202223556399.0 comprises an anaerobic tank body, a baffle plate, a water inlet pipe and a discharge pipe, wherein the baffle plate is fixedly arranged on the inner side wall of the anaerobic tank body and divides the inner part of the anaerobic tank body into a separation cavity and an anaerobic cavity, and the water inlet pipe and the discharge pipe are respectively fixedly arranged on the side walls of the two ends of the anaerobic tank body; the anaerobic tank comprises an anaerobic tank body, a separation cavity, a baffle, a cover plate, a communicating pipe, a control valve, an oil removing device and a stirring device, wherein the cover plate is arranged at the top end of the anaerobic tank body; the treatment process has the following defects: 1) In the process of sucking out the oil dirt on the sewage water surface through the water pump, the hose and the oil absorber, when the oil dirt is less, if the water pump is continued to suck out the oil dirt, the sewage and the oil dirt on the lower layer of the oil dirt are sucked out simultaneously; if the oil absorption is stopped, oil and dirt residues in the sewage can be caused, so that the treatment of the sewage in the anaerobic tank is affected; 2) When stirring sewage through multiunit puddler, can only make sewage carry out the flow of equidirectional, lead to sewage and anaerobic bacteria contact insufficient to influence the treatment effect of sewage.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide an anaerobic tank for sewage treatment, which can thoroughly separate oil from water, improve the fluidity of sewage, enable the sewage to fully contact anaerobic bacteria and react, and enable the sewage in the anaerobic tank to be quickly and fully purified.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

An anaerobic tank for sewage treatment comprises a tank body, a water inlet pipe, a water outlet pipe, an oil-water separator mechanism, a stirring mechanism, an air outlet mechanism, a baffle plate and a cover plate; the baffle plate is fixed in the box body, the box body is divided into an oil-water separation tank and an anaerobic tank, the bottom of the baffle plate is provided with a water pipe, and the water pipe is provided with a valve; the water inlet pipe is connected to the side wall of the tank body at one end of the oil-water separation tank, and the water outlet pipe is arranged on the side wall of the tank body, close to the bottom, of the anaerobic tank; the oil-water separation mechanism and the stirring mechanism are respectively arranged in the oil-water separation tank and the anaerobic tank; the cover plate is fixed at the top end of the box body through bolts, and the air outlet mechanism is arranged on the cover plate at one side of the anaerobic tank; after sewage enters an oil-water separation tank of a box body through a water inlet pipe, firstly standing the sewage to separate oil from water, sucking out upper layer floating oil through an oil-water separation mechanism, discharging lower layer sewage into an anaerobic tank through a water inlet pipe at the bottom end of a partition plate, and then introducing inert gas into the anaerobic tank through a stirring mechanism to discharge oxygen through an air outlet mechanism, thereby being beneficial to the growth of anaerobic bacteria; the anaerobic bacteria of the sewage oil fully contact and react when being stirred by the stirring mechanism, so as to purify the sewage; the purified sewage is discharged through a water outlet pipe.

The oil-water separation mechanism comprises a water pump, an oil suction pipe, a fixed plate, a guide rod, an oil collecting box, an electric push rod, a mounting box, a motor II, a screw rod, an oil suction roller and a motor III; the water pump is fixed on the cover plate at the top of the box body, the oil suction pipe adopts a hose, one end of the oil suction pipe is connected with the water pump, the other end of the oil suction pipe penetrates through the cover plate and enters the oil-water separation tank, and one end of the oil suction pipe positioned in the oil-water separation tank is provided with a funnel shape, so that the oil suction range of the oil suction pipe can be enlarged; the fixed plate is fixedly connected to the end part of the oil suction pipe, which is positioned in the oil-water separation tank, and floating plates are arranged at the two ends of the fixed plate; the guide rod is provided with a pair of box bodies fixed on two sides of the fixed plate, the floating plate is movably connected to the guide rod, and the bottom of the fixed plate is provided with a mounting groove; the oil collecting box is positioned in the mounting groove at the bottom end of the fixed plate, one end of the oil collecting box is provided with an inclined block I, the other end of the oil collecting box is provided with a guide shaft and a telescopic spring, one end of the guide shaft is fixed on the fixed plate and the telescopic spring is fixed on the surface of the oil collecting box, and the telescopic spring is fixed between the fixed plate and the oil collecting box; the top end of the oil collecting box is provided with an oil scraping plate; the oil suction pipe is provided with an oil suction branch pipe which is a hose, and the other end of the oil suction branch pipe is connected with the oil collecting box; the electric push rod is fixed on the fixed plate, the installation box is connected to the output end of the electric push rod, and one end of the installation box, which is close to the oil collecting box, is provided with an inclined block II; the inclined block I corresponds to the inclined block II; the screw rod is provided with a pair, both ends of the mounting box are connected through bearings, the motor III is fixed at one end of the mounting box, and the output shaft is connected with the screw rod; the moving plate is connected to the screw rod through threads, the oil suction roller is fixed on the moving plate, the motor II is fixed on the moving plate, and the output end of the motor II is connected with the oil suction roller; when more oil is in the oil-water separation tank, the oil suction pipe is driven by the water pump to directly suck out the oil; when the oil is less, the electric push rod provides power to drive the mounting box to move downwards, meanwhile, the inclined block II drives the inclined block I to move, the inclined block I drives the oil collecting box to move to one side, and the telescopic spring is compressed; then, a motor III provides power to drive a screw rod to rotate, the screw rod drives a moving plate to move through threads, the moving plate drives an oil suction roller to move, and oil on the upper layer is sucked away through the oil suction roller; then the electric push rod drives the installation box to return, the inclined block II is far away from the inclined block I, and the spring is restored to drive the oil collecting box to move below the oil absorbing roller; the motor II provides power to drive the oil suction roller to rotate, and the oil scraping plate extrudes oil stains in the oil suction roller so that the oil stains fall into the oil collecting box.

The stirring mechanism comprises a central shaft, a helical blade, a water flow channel, an arc-shaped baffle, a motor I, a gear II, a chain wheel and a chain; the inside of the central shaft is hollow, two ends of the central shaft are respectively connected to the side wall of the box body and the partition plate through bearings, and a plurality of evenly distributed air outlets are arranged on the central shaft; the spiral blades are fixed on the outer surface of the central shaft, the water flow channels are provided with a plurality of water outlets, the water flow channels are all fixed on the spiral blades, and one end of each water flow channel, which is close to the central shaft, is provided with a water outlet; the arc-shaped baffle is fixedly connected to one end of the water flow channel, which is far away from the central shaft, and extends to the outer side of the spiral blade; the motor I is fixed on the outer side wall of the box body, the gear I is connected to an output shaft of the motor I, the gear II is connected to one end of the central shaft, and the gear I is meshed with the gear II; the chain wheels are provided with a pair and are respectively connected to the corresponding central shafts, and the chain wheels are connected through chains; the motor I provides power to drive the gear I to rotate, the gear I drives the central shaft to rotate through the gear II, the central shaft drives the other group of central shafts to rotate through the chain wheel and the chain, the central shaft drives the helical blades to rotate, and the helical blades stir sewage; in the rotating process of the spiral blade, water flows towards two sides of the arc-shaped baffle plate through the blocking of the arc-shaped baffle plate, flows into the water flow channel, is discharged from the water outlet after passing through the water flow channel, so that sewage flows transversely along the spiral blade while stirring, the fluidity of the water flow is further improved, sewage and anaerobic bacteria are fully contacted and react, and the sewage in the anaerobic tank is quickly and fully purified.

The air outlet mechanism comprises a sealing cover, a spring guide shaft and a spring; the cover plate is provided with an air outlet and a mounting groove, and the mounting groove is provided with a plurality of air outlets which are arranged around the air outlet by taking the air outlet as the center; the sealing cover is connected to the air outlet, and a sealing strip is arranged on the outer surface of the sealing cover and the air outlet; the spring is fixed in the mounting groove and is connected with the sealing cover; the spring guide shaft passes through the sealing cover and is fixed in the mounting groove; after inert gas enters the box body through the stirring mechanism, oxygen in the anaerobic tank moves upwards to jack up the sealing cover and discharge the oxygen along the air outlet, and after ventilation is stopped, the spring resumes to drive the sealing cover to return to seal the air outlet, so that the survival of anaerobic bacteria in the anaerobic tank is facilitated, and the purification speed of sewage is improved.

The side wall of the box body is provided with an observation window, so that the oil-water separation condition can be observed at any time.

Compared with the prior art, the utility model has the beneficial effects that:

1) When more oil is in the oil-water separation tank, the oil suction pipe is driven by the water pump to directly suck out the oil; when the oil is less, the electric push rod provides power to drive the mounting box to move downwards, meanwhile, the inclined block II drives the inclined block I to move, the inclined block I drives the oil collecting box to move to one side, and the telescopic spring is compressed; then, a motor III provides power to drive a screw rod to rotate, the screw rod drives a moving plate to move through threads, the moving plate drives an oil suction roller to move, and oil on the upper layer is sucked away through the oil suction roller; then the electric push rod drives the installation box to return, the inclined block II is far away from the inclined block I, and the spring is restored to drive the oil collecting box to move below the oil absorbing roller; the motor II provides power to drive the oil suction roller to rotate, and the oil scraping plate extrudes oil stains in the oil suction roller to enable the oil stains to fall into the oil collecting box;

2) The motor I provides power to drive the gear I to rotate, the gear I drives the central shaft to rotate through the gear II, the central shaft drives the other group of central shafts to rotate through the chain wheel and the chain, the central shaft drives the helical blades to rotate, and the helical blades stir sewage; in the rotating process of the spiral blade, water flows towards two sides of the arc-shaped baffle plate through the blocking of the arc-shaped baffle plate, flows into the water flow channel, is discharged from the water outlet after passing through the water flow channel, so that sewage flows transversely along the spiral blade while stirring, the fluidity of the water flow is further improved, sewage and anaerobic bacteria are fully contacted and react, and the sewage in the anaerobic tank is quickly and fully purified.

Drawings

FIG. 1 is a schematic diagram of an anaerobic tank for sewage treatment according to the present utility model;

FIG. 2 is a schematic diagram showing the internal structure of an anaerobic tank for sewage treatment according to the present utility model;

FIG. 3 is a schematic structural view of a stirring mechanism in an anaerobic tank for sewage treatment according to the present utility model;

FIG. 4 is a schematic diagram of the structure of the air outlet mechanism in the anaerobic tank for sewage treatment;

FIG. 5 is a schematic diagram of the structure of the oil-water separation mechanism in the anaerobic tank for sewage treatment;

FIG. 6 is a schematic diagram II of a mechanism for separating oil from water in an anaerobic tank for sewage treatment according to the present utility model;

FIG. 7 is a schematic diagram III of a mechanism for separating oil from water in an anaerobic tank for sewage treatment;

In the figure: 1. a case; 101. an observation window; 2. a water inlet pipe; 3. a water outlet pipe; 4. an oil-water separation mechanism; 401. a water pump; 402. an oil suction pipe; 4021. an oil suction branch pipe; 403. a fixing plate; 4031. a mounting groove; 4032. a floating plate; 404. a guide rod; 405. an oil collecting box; 4051. oblique block I; 4052. a telescopic spring; 4053. a guide shaft; 4054. a wiper plate; 406. an electric push rod; 407. a mounting box; 4071. oblique block II; 408. a motor II; 409. a screw rod; 4091. a moving plate; 410. an oil suction roller; 411. a motor III; 5. a stirring mechanism; 501. a central shaft; 5011. an air jet; 502. a helical blade; 503. a water flow channel; 5031. a water outlet; 504. an arc baffle; 505. a motor I; 506. a gear I; 507. a gear II; 508. a sprocket; 509. a chain; 6. an air outlet mechanism; 601. sealing cover; 6011. a sealing strip; 602. a spring guide shaft; 603. a spring; 7. a partition plate; 701. a water pipe; 8. a cover plate; 801. an air outlet; 802. and a mounting groove.

Detailed Description

In order to facilitate understanding of those skilled in the art, the technical scheme of the present utility model will be further specifically described below with reference to fig. 1 to 7.

An anaerobic tank for sewage treatment comprises a tank body 1, a water inlet pipe 2, a water outlet pipe 3, an oil-water separation mechanism 4, a stirring mechanism 5, an air outlet mechanism 6, a baffle 7 and a cover plate 8; the baffle 7 is fixed in the box body 1 to divide the box body into an oil-water separation tank and an anaerobic tank, the bottom of the baffle 7 is provided with a water pipe 701, and the water pipe 701 is provided with a valve; the water inlet pipe 2 is connected to the side wall of the box body 1 at one end of the oil-water separation tank, and the water outlet pipe 3 is arranged on the side wall of the box body 1 close to the bottom of the anaerobic tank; the oil-water separation mechanism 4 and the stirring mechanism 5 are respectively arranged in the oil-water separation tank and the anaerobic tank; the cover plate 8 is fixed at the top end of the box body 1 through bolts, and the air outlet mechanism 6 is arranged on the cover plate 8 at one side of the anaerobic tank; after sewage enters an oil-water separation tank of the box body 1 through the water inlet pipe 2, firstly standing the sewage to separate oil from water, sucking out upper layer floating oil through the oil-water separation mechanism 4, discharging lower layer sewage into an anaerobic tank through a water inlet pipe 701 at the bottom end of the partition plate 7, and then introducing inert gas into the anaerobic tank through the stirring mechanism 5 to discharge oxygen through the air outlet mechanism 6, thereby being beneficial to the growth of anaerobic bacteria; the anaerobic bacteria of the sewage oil fully contact and react when being stirred by the stirring mechanism 5, thereby purifying the sewage; the purified sewage is discharged through the water outlet pipe 3.

The oil-water separator comprises a water pump 401, an oil suction pipe 402, a fixing plate 403, a guide rod 404, an oil collecting box 405, an electric push rod 406, an installation box 407, a motor II 408, a screw 409, an oil suction roller 410 and a motor III 411; the water pump 401 is fixed on the cover plate 8 at the top of the box body 1, the oil suction pipe 402 adopts a hose, one end of the oil suction pipe 402 is connected with the water pump 401, the other end of the oil suction pipe 402 penetrates through the cover plate 8 to enter the oil-water separation tank, and one end of the oil suction pipe 402 positioned in the oil-water separation tank is provided with a funnel shape, so that the oil suction range of the oil suction pipe 402 can be enlarged; the fixed plate 403 is fixedly connected to the end part of the oil suction pipe 402 positioned in the oil-water separation tank, and floating plates are arranged at two ends of the fixed plate 403; The guide rod 404 is provided with a pair of box bodies 1 fixed on two sides of the fixed plate 403, the floating plate 4032 is movably connected to the guide rod 404, and the bottom of the fixed plate 403 is provided with a mounting groove 4031; the oil collecting box 405 is positioned in the mounting groove 4031 at the bottom end of the fixing plate 403, one end of the oil collecting box 405 is provided with an inclined block I4051, the other end of the oil collecting box 405 is provided with a guide shaft 4053 and a telescopic spring 4052, one end of the guide shaft 4053 is fixed on the fixing plate 403 and the telescopic spring 4052 is fixed on the surface of the oil collecting box 405, and the telescopic spring 4052 is fixed between the fixing plate 403 and the oil collecting box 405; the top end of the oil collecting box 405 is provided with an oil scraping plate 4054; An oil suction branch pipe 4021 is arranged on the oil suction pipe 402, the oil suction branch pipe 4021 is a hose, and the other end of the oil suction branch pipe 4021 is connected with an oil collecting box 405; the electric push rod 406 is fixed on the fixed plate 403, the installation box 407 is connected to the output end of the electric push rod 406, and one end of the installation box 407, which is close to the oil collecting box 405, is provided with an inclined block II 4071; the inclined block I4051 corresponds to the inclined block II 4071; the lead screw 409 is provided with a pair, both ends of the mounting box 407 are connected through bearings, the motor III 411 is fixed at one end of the mounting box 407, and the output shaft is connected with the lead screw 409; the moving plate 4091 is connected to the screw 409 through threads, the oil suction roller 410 is fixed on the moving plate 4091, the motor II 408 is fixed on the moving plate 4091, and the output end is connected with the oil suction roller 410; When more oil is in the oil-water separation tank, the water pump 401 drives the oil suction pipe 402 to directly suck out the oil; when the oil is less, the electric push rod 406 provides power to drive the mounting box 407 to move downwards, meanwhile, the inclined block II 4071 drives the inclined block I4051 to move, the inclined block I4051 drives the oil collecting box 405 to move to one side, and the telescopic spring 4052 is compressed; then, a motor III 411 provides power to drive a screw rod 409 to rotate, the screw rod 409 drives a moving plate 4091 to move through threads, the moving plate 4091 drives an oil suction roller 410 to move, and oil on the upper layer is sucked away through the oil suction roller 410; then the electric push rod 406 drives the mounting box 407 to return, the inclined block II 4071 is far away from the inclined block I4051, and the spring is recovered to drive the oil collecting box 405 to move below the oil absorbing roller 410; The motor II 408 provides power to drive the oil suction roller 410 to rotate, and the oil scraping plate extrudes the oil stain in the oil suction roller 410 so that the oil stain falls into the oil collecting box 405.

The stirring mechanism 5 comprises a central shaft 501, a helical blade 502, a water flow channel 503, an arc-shaped baffle 504, a motor I505, a gear I506, a gear II 507, a sprocket 508 and a chain 509; the inside of the central shaft 501 is hollow, two ends of the central shaft 501 are respectively connected to the side wall of the box body 1 and the partition plate 7 through bearings, and a plurality of evenly distributed air nozzles 5011 are arranged on the central shaft 501; the spiral blade 502 is fixed on the outer surface of the central shaft 501, the water flow channel 503 is provided with a plurality of water outlets 5031 which are all fixed on the spiral blade 502, and one end of the water flow channel 503 close to the central shaft 501 is provided with a water outlet 5031; the arc-shaped baffle 504 is fixedly connected to one end of the water flow channel far away from the central shaft 501 and extends to the outer side of the spiral blade 502; the motor I505 is fixed on the outer side wall of the box body 1, the gear I506 is connected to the output shaft of the motor I505, the gear II 507 is connected to one end of the central shaft 501, and the gear I506 is in meshed connection with the gear II 507; the chain wheels 508 are provided with a pair and are respectively connected to the corresponding central shafts 501, and the chain wheels 508 are connected through a chain 509; the motor I505 provides power to drive the gear I506 to rotate, the gear I506 drives the central shaft 501 to rotate through the gear II 507, the central shaft 501 drives the other group of central shafts 501 to rotate through the chain wheel 508 and the chain 509, the central shaft 501 drives the helical blades 502 to rotate, and the helical blades 502 stir sewage; in the rotation process of the spiral blade 502, water flows to two sides of the arc-shaped baffle 504 through the blocking of the arc-shaped baffle 504, flows into the water flow channel 503, and then is discharged from the water outlet 5031 after passing through the water flow channel 503, so that sewage is stirred and flows transversely along the spiral blade 502, the fluidity of the water flow is further improved, the sewage is fully contacted with anaerobic bacteria and reacts, and the sewage in the anaerobic tank is quickly and fully purified.

The air outlet mechanism 6 comprises a sealing cover 601, a spring guide shaft 602 and a spring 603; the cover plate 8 is provided with an air outlet 801 and a mounting groove 802, and the mounting groove 802 is provided with a plurality of air outlets 801 which are arranged around the air outlet 801; the sealing cover 601 is connected to the air outlet 801, and the sealing cover 601 and the air outlet 801 are connected to the outer surface of the air outlet and provided with sealing strips 6011; the spring 603 is fixed in the mounting groove 802 and is connected with the sealing cover 601; the spring guide shaft 602 is fixed in the mounting groove 802 through the sealing cover 601; after inert gas enters the box body 1 through the stirring mechanism 5, oxygen in the anaerobic tank moves upwards to jack up the sealing cover 601 and discharge the inert gas along the air outlet 801, and after ventilation is stopped, the spring 603 resumes driving the sealing cover 601 to return to seal the air outlet 801, so that survival of anaerobic bacteria in the anaerobic tank is facilitated, and the sewage purification speed is improved.

The side wall of the box body 1 is provided with an observation window 101, so that the oil-water separation condition can be observed at any time.

An anaerobic tank for sewage treatment, which has the following working process: after sewage enters an oil-water separation tank of the box body 1 through the water inlet pipe 2, firstly standing the sewage to separate oil from water, sucking out upper layer floating oil through the oil-water separation mechanism 4, discharging lower layer sewage into an anaerobic tank through a water inlet pipe 701 at the bottom end of the partition plate 7, and then introducing inert gas into the anaerobic tank through the stirring mechanism 5 to discharge oxygen through the air outlet mechanism 6, thereby being beneficial to the growth of anaerobic bacteria; the anaerobic bacteria of the sewage oil fully contact and react when being stirred by the stirring mechanism 5, thereby purifying the sewage; the purified sewage is discharged through the water outlet pipe 3.

The foregoing is merely illustrative and explanatory of the utility model, as it is well within the scope of the utility model as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. An anaerobic tank for sewage treatment comprises a tank body, a water inlet pipe, a water outlet pipe, an oil-water separator mechanism, a stirring mechanism, an air outlet mechanism, a baffle plate and a cover plate; the device is characterized in that a baffle plate is fixed in the box body, the box body is divided into an oil-water separation tank and an anaerobic tank, a water pipe is arranged at the bottom of the baffle plate, and a valve is arranged on the water pipe; the water inlet pipe is connected to the side wall of the tank body at one end of the oil-water separation tank, and the water outlet pipe is arranged on the side wall of the tank body, close to the bottom, of the anaerobic tank; the oil-water separation mechanism and the stirring mechanism are respectively arranged in the oil-water separation tank and the anaerobic tank; the cover plate is fixed at the top end of the box body through bolts, and the air outlet mechanism is arranged on the cover plate at one side of the anaerobic tank;

the oil-water separator comprises a water pump, an oil suction pipe, a fixed plate, a guide rod, an oil collecting box, an electric push rod, a mounting box, a motor II, a screw rod, an oil suction roller and a motor III; the water pump is fixed on the cover plate at the top of the box body, the oil suction pipe adopts a hose, one end of the oil suction pipe is connected with the water pump, the other end of the oil suction pipe penetrates through the cover plate and enters the oil-water separation tank, and one end of the oil suction pipe positioned in the oil-water separation tank is provided with a funnel shape, so that the oil suction range of the oil suction pipe can be enlarged; the fixed plate is fixedly connected to the end part of the oil suction pipe, which is positioned in the oil-water separation tank, and floating plates are arranged at the two ends of the fixed plate; the guide rod is provided with a pair of box bodies fixed on two sides of the fixed plate, the floating plate is movably connected to the guide rod, and the bottom of the fixed plate is provided with a mounting groove; the oil collecting box is positioned in the mounting groove at the bottom end of the fixed plate, one end of the oil collecting box is provided with an inclined block I, the other end of the oil collecting box is provided with a guide shaft and a telescopic spring, one end of the guide shaft is fixed on the fixed plate and the telescopic spring is fixed on the surface of the oil collecting box, the telescopic spring is fixed between the fixed plate and the oil collecting box, and the top end of the oil collecting box is provided with an oil scraping plate; the oil suction pipe is provided with an oil suction branch pipe which is a hose, and the other end of the oil suction branch pipe is connected with the oil collecting box; the electric push rod is fixed on the fixed plate, the installation box is connected to the output end of the electric push rod, and one end of the installation box, which is close to the oil collecting box, is provided with an inclined block II; the inclined block I corresponds to the inclined block II; the screw rod is provided with a pair, both ends of the mounting box are connected through bearings, the motor III is fixed at one end of the mounting box, and the output shaft is connected with the screw rod; the moving plate is connected to the screw rod through threads, the oil suction roller is fixed on the moving plate, the motor II is fixed on the moving plate, and the output end of the motor II is connected with the oil suction roller;

The stirring mechanism comprises a central shaft, a helical blade, a water flow channel, an arc-shaped baffle, a motor I, a gear II, a chain wheel and a chain; the inside of the central shaft is hollow, two ends of the central shaft are respectively connected to the side wall of the box body and the partition plate through bearings, and a plurality of evenly distributed air outlets are arranged on the central shaft; the spiral blades are fixed on the outer surface of the central shaft, the water flow channels are provided with a plurality of water outlets, the water flow channels are all fixed on the spiral blades, and one end of each water flow channel, which is close to the central shaft, is provided with a water outlet; the arc-shaped baffle is fixedly connected to one end of the water flow channel, which is far away from the central shaft, and extends to the outer side of the spiral blade; the motor I is fixed on the outer side wall of the box body, the gear I is connected to an output shaft of the motor I, the gear II is connected to one end of the central shaft, and the gear I is meshed with the gear II; the chain wheels are provided with a pair and are respectively connected to the corresponding central shafts, and the chain wheels are connected through chains.

2. An anaerobic tank for sewage treatment according to claim 1, wherein the air outlet mechanism comprises a sealing cover, a spring guide shaft and a spring; the cover plate is provided with an air outlet and a mounting groove, and the mounting groove is provided with a plurality of air outlets which are arranged around the air outlet by taking the air outlet as the center; the sealing cover is connected to the air outlet, and a sealing strip is arranged on the outer surface of the sealing cover and the air outlet; the spring is fixed in the mounting groove and is connected with the sealing cover; the spring guide shaft passes through the sealing cover and is fixed in the mounting groove.

3. An anaerobic tank for sewage treatment according to claim 1, wherein the side wall of the tank body is provided with an observation window.