CN106186607A - Effectively the mud in sewage can be carried out the sewage disposal system of precipitation separation - Google Patents

Abstract

The invention provides a sewage treatment system capable of effectively separating and precipitating sludge in sewage, comprising a sludge separation device, a sludge stirring device, a sewage sedimentation device and a sewage treatment device, one end of the sludge separation device is connected to the sludge stirring device, The other end of the sludge separation device is connected with the sewage sedimentation device, and the sewage sedimentation device is connected with the sewage treatment device. Biotechnology is used to biodegrade sewage, thereby reducing various types of pollution to the environment caused by putting various chemicals into the sewage. There will be some sludge in the sewage, and the sludge will affect the biodegradation process of the sewage. To have a certain impact, first of all, the sewage sludge is effectively separated, and the separated sludge is treated and applied to other fields.

Description

A sewage treatment system that can effectively separate and precipitate sludge in sewage

technical field

The invention relates to the technical field of environmental protection, and more specifically relates to a sewage treatment system capable of effectively separating and precipitating sludge in sewage.

Background technique

Sewage treatment is the process of purifying sewage to meet the water quality requirements of a certain water body for drainage or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and it is also increasingly entering the daily life of ordinary people.

In recent years, the discharge of urban domestic sewage has become the main pollution source of China's urban water. Urban domestic sewage treatment is the top priority of urban water conservation and urban water environment protection at present and in the future. This requires us to deal with domestic sewage facilities. Construction is an important part of urban infrastructure, and it is a matter of urgency. However, the current sewage treatment tanks have high production costs and poor treatment effects.

Contents of the invention

The present invention overcomes the deficiencies in the prior art. The current sewage treatment pool has high production cost and poor treatment effect, and provides a sewage treatment system capable of effectively separating and precipitating sludge in sewage, and adopts biological technology to process sewage Biodegradation treatment, thereby reducing various types of pollution to the environment caused by putting various chemicals into the sewage. There will be some sludge in the sewage, and the sludge will have a certain impact on the biodegradation process of the sewage. First Sewage sludge is effectively separated, and the separated sludge is used in other fields after treatment.

The purpose of the present invention is achieved through the following technical solutions.

A sewage treatment system capable of effectively separating and precipitating sludge in sewage, including a sludge separation device, a sludge stirring device, a sewage sedimentation device and a sewage treatment device, one end of the sludge separation device is connected to the sludge stirring device , the other end of the sludge separation device is connected to the sewage sedimentation device, and the sewage sedimentation device is connected to the sewage treatment device;

The sludge separation device includes a sewage storage tank and a sludge centrifugation device, the sludge centrifugation device is provided at the bottom end of the sewage storage tank, and a sewage discharge pipeline is provided at the bottom end of the sewage storage tank. The sludge centrifugation device includes a centrifugal ball, a water inlet pipe, a main water inlet pipe, a centrifugal base, a centrifugal motor and a sludge discharge pipe. The centrifugal motor is arranged inside, the main water inlet pipe is connected with the centrifugal motor, the sub-water inlet pipes are evenly arranged on the main water inlet pipe, The centrifugal ball, the centrifugal ball adopts a hollow interlaced spherical structure, the sludge discharge pipe is arranged on the bottom side of the main water inlet pipe, and a sewage pump is arranged on the sludge discharge pipe, The top of the main water inlet pipe is connected to the sewage water inlet pipeline through the water inlet pump;

The sludge stirring device includes a sludge storage tank, a stirring shaft, a stirring driver and a stirring component, the sludge storage tank is connected to the sludge centrifugal device through the sludge discharge pipe, and the stirring driver is arranged on the On the inner wall of the sludge storage tank, the two ends of the stirring shaft are connected to the inner wall of the sludge storage tank through the stirring driver, the stirring drive is used to drive the stirring shaft to rotate, and the stirring parts are uniform Set on the stirring shaft, the stirring member includes a vertical stirring rod, a first horizontal stirring rod, a second horizontal stirring rod and a stirring rod, one end of the vertical stirring rod is arranged on the stirring shaft, the The other end of the vertical stirring rod is provided with the first horizontal stirring rod, the middle part of the vertical stirring rod is provided with the second horizontal stirring rod, and the first horizontal stirring rod and the second horizontal stirring rod The stirring rods are arranged evenly and staggeredly;

The sewage sedimentation device includes a sedimentation tank, a top sludge recovery device and a bottom sludge recovery device. A water inlet is arranged on the top of the sedimentation tank, and the water inlet is connected to the sewage discharge pipeline. A sludge outlet is provided on one side of the bottom end of the tank, and a water outlet is provided on the other side of the sedimentation tank. device, the top sludge recovery device includes a sludge recovery tank, a sludge collection scraper and a scraper sliding guide rail, the scraper sliding guide rail is set on the top of the sedimentation tank, and the sludge collection scraper is movable On the sliding guide rail of the scraper, the sludge recovery tank is arranged on the top side of the sedimentation tank through the sludge recovery guide rail, and the sludge recovery tank adopts an "L" shape structure, and is set at the bottom of the sedimentation tank There is the bottom sludge recovery device, the bottom sludge recovery device includes bottom sludge export tank, export scraper and export scraper slide rail, the sludge export tank is arranged above the sludge discharge port, The export scraper slide rail is set at the bottom of the sedimentation tank, the export scraper is movable on the export scraper slide rail, and the angle between the sludge export groove and the horizontal direction is 10-20° °;

The sewage treatment device includes a degradation tank, a biodegradation device and an agitation device. A water inlet is arranged on the top of the degradation tank, and the water inlet is connected to the communication pipeline through a sewage pump. On the communication pipeline, there is a A water inlet valve is provided with a drain outlet at the bottom of the degradation tank, the drain outlet is connected to the drain pipeline, a drain valve is set on the drain pipeline, and the biodegradation device is vertically and parallelly arranged on the In the degradation tank, the agitation device is provided between the biodegradation devices, the biodegradation device includes a left support plate, a right support plate and a biodegrader, and the left support plate and the right support plate are arranged on the On the inner wall of the degradation tank, a left through hole is provided on the left support plate, a right through hole is provided on the right support plate, and the left through hole and the right through hole are interlaced. The biodegrader is arranged between the left support plate and the right support plate, and the biodegrader includes an active degradation absorber, a filter shell and a filter membrane, the filter shell adopts a rectangular structure, and on the filter shell Filter holes are evenly arranged, the filter membrane is arranged inside the filter shell, and the active degradation absorber is arranged inside the filter membrane.

The stirring device includes a stirring motor, a stirring head and a stirring lifting rod, the stirring motor is arranged at one end of the stirring lifting rod, the stirring head is arranged at the other end of the stirring motor, and the stirring lifting rod includes a first The lifting rod, the second lifting rod, the third lifting rod and the lifting rod casing, the first lifting rod is socketed with the second lifting rod, the second lifting rod is socketed with the third lifting rod, The lifting rod sleeve is arranged outside the stirring lifting rod, and the length of the lifting rod sleeve is equal to the sum of the lengths of the first lifting rod, the second lifting rod and the third lifting rod.

A water level monitor is arranged at the top of the degradation tank, an oxygen content monitoring device is arranged at the bottom of the degradation tank, and the output end of the water level monitor is connected to the water input end of the control system arranged on the outside of the degradation tank, The water output end of the control system is connected to the switch of the water inlet valve, the output end of the oxygen content monitoring device is connected to the drainage input end of the control system, and the drainage output end of the control system is connected to the water inlet valve. The switch of the drain valve is connected.

The beneficial effects of the present invention are: the sludge separation device is provided with a sludge centrifugation device at the bottom of the sewage storage tank, and the sludge centrifugation device effectively separates the sludge in the sewage from the sewage through centrifugal action, thereby Avoid the impact of sludge on the subsequent sewage treatment process, improve the efficiency of sewage treatment, and discharge the sludge in the sludge centrifuge device through the sludge discharge pipe, so as to avoid the sludge blocking the main water inlet pipe and affecting the relationship between sludge and sewage Separation effect; the setting of the sludge recovery device enables the sludge floating on the upper layer of sewage to be collected by the top layer of sludge recovery device in advance, so that the sludge floating on the upper layer of sewage will not affect the aeration of sewage, and at the same time reduces the The content of sludge in the sewage; the sludge in the sludge centrifuge device is discharged to the sludge storage tank through the sludge discharge pipe, and the sludge in the sludge storage tank is cleaned by the stirring device installed in the sludge storage tank Continuous stirring and crushing operations are carried out, so that large pieces of sludge can be turned into small pieces of sludge, so that subsequent operations can be carried out, so that the sludge in the sewage can be effectively used, and waste products in sewage treatment can be reduced. amount; a sewage sedimentation device is installed, through which the sludge and insoluble matter in the sewage can be recovered in the early stage, and the top sludge recovery tank and the bottom sludge recovery tank can simultaneously treat the top and bottom sludge in the sedimentation tank The mud is recycled, so as to ensure that the content of sludge and insoluble matter in the sewage entering the sewage treatment device is greatly reduced, improve the efficiency of subsequent sewage treatment, and also prevent the sludge from blocking the biodegradation device, resulting in a decrease in the efficiency of the subsequent biodegradation process; Through the biodegradation device installed in the degradation tank, various pollutants in the sewage that can be degraded and treated by microbial degradation are biologically degraded, thus effectively avoiding the use of chemical substances in the sewage to degrade the pollution There are water inlet valves and drain valves on the sewage discharge pipeline and drainage pipeline respectively, and a water level monitor and an oxygen content monitoring device are installed at the bottom of the degradation tank to automatically control the sewage content in the degradation tank. When the sewage content is too high, the control system controls the water inlet valve to close, so that the biodegradation device can degrade the sewage in the main body of the device. When the standard value is reached, the control system controls the drain valve to open to drain outwards, so that the sewage on the left side can effectively flow to the lower right side of the degradation tank, effectively monitoring the efficiency of sewage treatment.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of biodegradation device among the present invention;

In the figure: 1 is the degradation tank, 2 is the sewage pump, 3 is the biodegradation device, 4 is the sewage storage tank, 5 is the centrifugal ball, 6 is the water inlet pipe, 7 is the main water inlet pipe, 8 is the centrifugal base, 9 is the sludge discharge pipe, 10 is the sludge storage tank, 11 is the stirring shaft, 12 is the stirring driver, 13 is the vertical stirring rod, 14 is the first horizontal stirring rod, 15 is the second horizontal stirring rod, 16 is the stirring rod , 17 is a sewage discharge pipeline, 18 is a drainage pipeline, 19 is a water inlet valve, 20 is a drain valve, 21 is a left support plate, 22 is a right support plate, 23 is a left through hole, 24 is a right through hole, 25 26 is the filter shell, 27 is the stirring motor, 28 is the stirring head, 29 is the stirring lifting rod, 30 is the water level monitor, 31 is the oxygen content monitoring device, 32 is the control system, 33 is the sedimentation tank , 34 is a sludge recovery tank, 35 is a sludge collection scraper, 36 is a scraper slide guide, 37 is a bottom sludge export groove, 38 is an export scraper, and 39 is an export scraper slide rail.

detailed description

The technical solutions of the present invention will be further described below through specific examples.

As shown in Figure 1 and Figure 2, 1 is the degradation tank, 2 is the sewage pump, 3 is the biodegradation device, 4 is the sewage storage tank, 5 is the centrifugal ball, 6 is the water inlet pipe, and 7 is the main water inlet Pipe fittings, 8 is the centrifugal base, 9 is the sludge discharge pipe, 10 is the sludge storage tank, 11 is the stirring shaft, 12 is the stirring drive, 13 is the vertical stirring rod, 14 is the first horizontal stirring rod, 15 is the second Horizontal stirring rod, 16 is a stirring rod, 17 is a sewage discharge pipeline, 18 is a drainage pipeline, 19 is a water inlet valve, 20 is a drain valve, 21 is a left support plate, 22 is a right support plate, and 23 is a left through hole , 24 is the right through hole, 25 is the active degradation absorber, 26 is the filter shell, 27 is the stirring motor, 28 is the stirring head, 29 is the stirring lifting rod, 30 is the water level monitor, 31 is the oxygen content monitoring device, 32 is the control system, 33 is the sedimentation tank, 34 is the sludge recovery tank, 35 is the sludge collection scraper, 36 is the sliding guide rail of the scraper, 37 is the bottom sludge export tank, 38 is the export scraper, 39 is the export scraper rails.

A sewage treatment system capable of effectively separating and sedimenting sludge in sewage, including a sludge separation device, a sludge stirring device, a sewage sedimentation device, and a sewage treatment device. One end of the sludge separation device is connected to the sludge stirring device, and the sludge is separated The other end of the device is connected to the sewage sedimentation device, and the sewage sedimentation device is connected to the sewage treatment device;

The sludge separation device includes a sewage storage tank and a sludge centrifugation device. A sludge centrifugation device is provided at the bottom of the sewage storage tank, and a sewage discharge pipeline is provided at the bottom of the sewage storage tank. The sludge centrifugation device includes a centrifugal ball, a separator Water pipe fittings, main water inlet pipe fittings, centrifugal base, centrifugal motor and sludge discharge pipe, a centrifugal base is arranged at the bottom of the sewage storage tank, a centrifugal motor is arranged in the centrifugal base, and the main water inlet pipe is connected with the centrifugal motor. The main water inlet pipe is evenly equipped with sub-inlet pipes, and centrifugal balls are arranged on the sub-inlet pipes. The centrifugal balls adopt a hollow and interlaced spherical structure, and the sludge discharge pipe is arranged on the bottom side of the main water inlet. In addition, a sewage pump is installed on the sludge discharge pipe, and the top of the main water inlet pipe is connected to the sewage water inlet pipe through the water inlet pump;

The sludge stirring device includes a sludge storage tank, a stirring shaft, a stirring driver and a stirring component. The sludge storage tank is connected to the sludge centrifugal device through a sludge discharge pipe. The stirring drive is arranged on the inner wall of the sludge storage tank. The two stirring shafts The end is connected with the inner wall of the sludge storage tank through the stirring driver. The stirring driver is used to drive the stirring shaft to rotate. The stirring parts are evenly arranged on the stirring shaft. The stirring parts include a vertical stirring rod, a first horizontal stirring rod, a second horizontal stirring rod Rod and stirring rod, one end of the vertical stirring rod is set on the stirring shaft, the other end of the vertical stirring rod is provided with the first horizontal stirring rod, the middle part of the vertical stirring rod is provided with the second horizontal stirring rod, and the first horizontal stirring rod Stirring rods are arranged evenly and alternately on the second horizontal stirring rod;

The sewage sedimentation device includes a sedimentation tank, a top sludge recovery device and a bottom sludge recovery device. There is a water inlet on the top of the sedimentation tank, which is connected to the sewage discharge pipeline, and a sludge discharge outlet is set on the bottom side of the sedimentation tank. , there is a water outlet on the other side of the sedimentation tank, the water outlet is connected to the communication pipeline, and a top-layer sludge recovery device is installed on the top of the sedimentation tank. The top-layer sludge recovery device includes a sludge recovery tank, a sludge collection scraper and Scraper sliding guide rail, the scraper sliding guide rail is set on the top of the sedimentation tank, the sludge collection scraper is set on the scraper sliding guide rail, the sludge recovery tank is set on the top side of the sedimentation tank through the sludge recovery guide rail, and the sludge recovery The tank adopts an "L"-shaped structure, and a bottom sludge recovery device is installed at the bottom of the sedimentation tank. The bottom sludge recovery device includes the bottom sludge export tank, the export scraper and the export scraper slide rail. Above the outlet, the export scraper slide rail is set at the bottom of the sedimentation tank, and the export scraper is movable on the export scraper slide rail, and the angle between the sludge export tank and the horizontal direction is 10-20°;

The sewage treatment device includes a degradation tank, a biodegradation device and an agitation device. A water inlet is arranged on the top of the degradation tank, and the water inlet is connected to a communication pipeline through a sewage pump. A water inlet valve is arranged on the communication pipeline. The end is provided with a drain port, the drain port is connected to the drain pipeline, and a drain valve is set on the drain pipeline, and the biodegradation device is vertically and parallelly arranged in the degradation tank, and a stirring device is provided between the biodegradation devices, and the biodegradation device includes The left support plate, the right support plate and the biodegrader, the left support plate and the right support plate are arranged on the inner wall of the degradation tank, the left through hole is arranged on the left support plate, the right through hole is arranged on the right support plate, the left The through holes and the right through holes are arranged alternately, and a biodegrader is arranged between the left support plate and the right support plate. The biodegrader includes an active degradation absorber, a filter shell and a filter membrane. The filter shell adopts a rectangular structure. On the filter shell Filter holes are evenly arranged, a filter membrane is arranged inside the filter shell, and an active degradation absorber is arranged inside the filter membrane.

The stirring device includes a stirring motor, a stirring head and a stirring lifting rod, the stirring motor is arranged at one end of the stirring lifting rod, the stirring head is arranged at the other end of the stirring motor, and the stirring lifting rod includes a first lifting rod, a second lifting rod, and a third lifting rod And the lifting rod sleeve, the second lifting rod is socketed in the first lifting rod, the third lifting rod is socketed in the second lifting rod, the lifting rod sleeve is arranged on the outside of the stirring lifting rod, and the length of the lifting rod sleeve is equal to the first The sum of the lengths of the first lifting rod, the second lifting rod and the third lifting rod.

A water level monitor is set at the top of the degradation tank, and an oxygen content monitoring device is set at the bottom of the degradation tank. It is connected with the switch of the water inlet valve, the output end of the oxygen content monitoring device is connected with the drain input end of the control system, and the drain output end of the control system is connected with the switch of the drain valve.

The filter membranes in the embodiments all adopt existing materials that only allow water to pass through and prevent solid matter from passing through.

The sludge separation device is installed at the bottom of the sewage storage tank with a sludge centrifugation device, which effectively separates the sludge in the sewage from the sewage through centrifugal action, thereby preventing the sludge from affecting the subsequent sewage treatment. The impact of the process, improve the efficiency of sewage treatment, discharge the sludge in the sludge centrifuge device through the sludge discharge pipe, so as to avoid the sludge blocking the main water inlet pipe, and affect the separation effect of sludge and sewage; sludge recovery device The setting enables the sludge floating on the upper layer of sewage to be collected by the top sludge recovery device in advance, so that the sludge floating on the upper layer of sewage will not affect the aeration of sewage, and at the same time reduce the sludge content in sewage again; The sludge in the sludge centrifuge is discharged to the sludge storage tank through the sludge discharge pipe, and the sludge in the sludge storage tank is continuously stirred and beaten by the stirring device installed in the sludge storage tank. Crushing operation, so that large pieces of sludge can be turned into small pieces of sludge, so that the follow-up operation can be carried out, so that the sludge in the sewage can be effectively used, and the amount of waste products in sewage treatment can be reduced; sewage sedimentation The sewage sedimentation device can recycle the sludge and insoluble matter in the sewage in the early stage. The top sludge recovery tank and the bottom sludge recovery tank can simultaneously recycle the top and bottom sludge in the sedimentation tank, so as to ensure that the sludge entering The content of sludge and insoluble matter in the sewage in the sewage treatment device is greatly reduced, which improves the efficiency of subsequent sewage treatment, and can also prevent the sludge from blocking the biodegradation device, resulting in a decrease in the efficiency of the subsequent biodegradation process; The degradation device is used to biodegrade various pollutants in the sewage that can be degraded and treated by microbial degradation, thus effectively avoiding the use of chemical substances in the sewage to degrade the pollutants; in the sewage discharge pipeline Water inlet valves and drain valves are installed on the drainage and drainage pipelines, and water level monitors and oxygen content monitoring devices are installed at the bottom of the degradation tank to automatically control the sewage content in the degradation tank. When the sewage content is too high, the control The system controls the water inlet valve to close, so that the biodegradation device degrades the sewage in the main body of the device. When the oxygen content monitoring device sends a signal to the control system, that is, when the oxygen content of the sewage on the far right side of the degradation tank has reached the standard value, the control system Control the opening of the drain valve to drain outwards, so that the sewage on the left can effectively flow to the lower layer on the right of the degradation tank, and effectively monitor the efficiency of sewage treatment.

The present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (3)

1. A sewage treatment system capable of effectively separating and precipitating sludge in sewage, characterized in that it includes a sludge separation device, a sludge stirring device, a sewage sedimentation device and a sewage treatment device, one end of the sludge separation device is connected to the The sludge stirring device is connected, the other end of the sludge separation device is connected to the sewage sedimentation device, and the sewage sedimentation device is connected to the sewage treatment device; The sludge separation device includes a sewage storage tank and a sludge centrifugation device, the sludge centrifugation device is provided at the bottom end of the sewage storage tank, and a sewage discharge pipeline is provided at the bottom end of the sewage storage tank. The sludge centrifugation device includes a centrifugal ball, a water inlet pipe, a main water inlet pipe, a centrifugal base, a centrifugal motor and a sludge discharge pipe. The centrifugal motor is arranged inside, the main water inlet pipe is connected with the centrifugal motor, the sub-water inlet pipes are evenly arranged on the main water inlet pipe, The centrifugal ball, the centrifugal ball adopts a hollow interlaced spherical structure, the sludge discharge pipe is arranged on the bottom side of the main water inlet pipe, and a sewage pump is arranged on the sludge discharge pipe, The top of the main water inlet pipe is connected to the sewage water inlet pipeline through the water inlet pump; The sludge stirring device includes a sludge storage tank, a stirring shaft, a stirring driver and a stirring component, the sludge storage tank is connected to the sludge centrifugal device through the sludge discharge pipe, and the stirring driver is arranged on the On the inner wall of the sludge storage tank, the two ends of the stirring shaft are connected to the inner wall of the sludge storage tank through the stirring driver, the stirring drive is used to drive the stirring shaft to rotate, and the stirring parts are uniform Set on the stirring shaft, the stirring member includes a vertical stirring rod, a first horizontal stirring rod, a second horizontal stirring rod and a stirring rod, one end of the vertical stirring rod is arranged on the stirring shaft, the The other end of the vertical stirring rod is provided with the first horizontal stirring rod, the middle part of the vertical stirring rod is provided with the second horizontal stirring rod, and the first horizontal stirring rod and the second horizontal stirring rod The stirring rods are arranged evenly and staggeredly; The sewage sedimentation device includes a sedimentation tank, a top sludge recovery device and a bottom sludge recovery device. A water inlet is arranged on the top of the sedimentation tank, and the water inlet is connected to the sewage discharge pipeline. A sludge outlet is provided on one side of the bottom end of the tank, and a water outlet is provided on the other side of the sedimentation tank. device, the top sludge recovery device includes a sludge recovery tank, a sludge collection scraper and a scraper sliding guide rail, the scraper sliding guide rail is set on the top of the sedimentation tank, and the sludge collection scraper is movable On the sliding guide rail of the scraper, the sludge recovery tank is arranged on the top side of the sedimentation tank through the sludge recovery guide rail, and the sludge recovery tank adopts an "L" shape structure, and is set at the bottom of the sedimentation tank There is the bottom sludge recovery device, the bottom sludge recovery device includes bottom sludge export tank, export scraper and export scraper slide rail, the sludge export tank is arranged above the sludge discharge port, The export scraper slide rail is set at the bottom of the sedimentation tank, the export scraper is movable on the export scraper slide rail, and the angle between the sludge export groove and the horizontal direction is 10-20° °; The sewage treatment device includes a degradation tank, a biodegradation device and an agitation device. A water inlet is arranged on the top of the degradation tank, and the water inlet is connected to the communication pipeline through a sewage pump. On the communication pipeline, there is a A water inlet valve is provided with a drain outlet at the bottom of the degradation tank, the drain outlet is connected to the drain pipeline, a drain valve is set on the drain pipeline, and the biodegradation device is vertically and parallelly arranged on the In the degradation tank, the agitation device is provided between the biodegradation devices, the biodegradation device includes a left support plate, a right support plate and a biodegrader, and the left support plate and the right support plate are arranged on the On the inner wall of the degradation tank, a left through hole is provided on the left support plate, a right through hole is provided on the right support plate, and the left through hole and the right through hole are interlaced. The biodegrader is arranged between the left support plate and the right support plate, and the biodegrader includes an active degradation absorber, a filter shell and a filter membrane, the filter shell adopts a rectangular structure, and on the filter shell Filter holes are evenly arranged, the filter membrane is arranged inside the filter shell, and the active degradation absorber is arranged inside the filter membrane. 2. The sewage treatment system capable of effectively separating and precipitating sludge in sewage according to claim 1, characterized in that: the stirring device includes a stirring motor, a stirring head and a stirring lifting rod, and the stirring motor is arranged on One end of the stirring lifting rod, the stirring head is arranged at the other end of the stirring motor, the stirring lifting rod includes a first lifting rod, a second lifting rod, a third lifting rod and a lifting rod sleeve, the first lifting rod The second lifting rod is socketed in a lifting rod, the third lifting rod is socketed in the second lifting rod, the lifting rod casing is arranged on the outside of the stirring lifting rod, and the lifting rod sleeve The length of the tube is equal to the sum of the lengths of the first lifting rod, the second lifting rod and the third lifting rod. 3. The sewage treatment system capable of effectively separating and precipitating sludge in sewage according to claim 1, wherein a water level monitor is provided at the top of the degradation tank, and a water level monitor is provided at the bottom of the degradation tank. An oxygen content monitoring device, the output end of the water level monitor is connected to the water volume input end of the control system arranged outside the degradation tank, the water volume output end of the control system is connected to the switch of the water inlet valve, and the water volume output end of the control system is connected to the switch of the water inlet valve. The output end of the oxygen monitoring device is connected with the drainage input end of the control system, and the drainage output end of the control system is connected with the switch of the drainage valve.