CN209024328U - It is a kind of can self-cleaning reflux precipitating sewage disposal device - Google Patents

Abstract

The utility model belongs to the technical field of sewage treatment equipment, and in particular relates to a sewage treatment equipment capable of self-purification, backflow and sedimentation, comprising a sedimentation tank and a sewage treatment tank, wherein the sedimentation tank and the sewage treatment tank are connected by a connecting pipe, and the sedimentation tank is provided with a The flocculant stirring device, the bottom end of the sedimentation tank is provided with a sloping plate through the inclined plate fixing frame, the middle of the sewage treatment tank is provided with a filter screen, the side of the filter screen close to the sedimentation tank is provided with a cleaning device, and the filter screen is on the other side. A sponge plate is arranged on one side, an oxygenation device is arranged between the filter screen and the sponge plate, and a return pipe is also arranged between the sewage treatment tank and the sedimentation tank. The utility model can make the sewage in the sedimentation tank fully contact with the flocculant, precipitate the impurities in the sewage to the greatest extent, and improve the working efficiency of sewage sedimentation; the sewage treatment tank can also be cleaned after the work, so as to avoid long-term accumulation The dirt blocks the corresponding equipment and prolongs the service life of the device.

Description

A kind of sewage treatment equipment that can self-purify backflow sedimentation

technical field

The utility model belongs to the technical field of sewage treatment equipment, in particular to a sewage treatment equipment capable of self-purification, backflow and sedimentation.

Background technique

Sewage treatment: The process of purifying sewage in order to make it meet the water quality requirements of a 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. It is also increasingly entering the daily life of ordinary people. According to the nature of sewage, water There are two types of water pollution: one is natural pollution; the other is man-made pollution. At present, man-made pollution is the most harmful to water bodies. Water pollution can be divided into three categories: chemical pollution, physical pollution and biological pollution according to the different pollution impurities. Pollutants mainly include untreated industrial wastewater and untreated domestic sewage; farmland sewage with extensive use of chemical fertilizers, pesticides, and herbicides; industrial waste and domestic garbage piled up by the river; soil erosion; mines sewage.

If these sewage is not properly treated and directly discharged into the environment, it will inevitably pollute the environment. These sewage generally contain a large amount of domestic waste or construction waste, that is, the water body contains a large amount of impurities. These impurities are often the main reason for destroying the ecology of the water body. Therefore, the impurities in these sewage need to be treated. The existing sewage treatment equipment simply adds a flocculant to the sewage to precipitate impurities in the sewage. However, due to the large amount of sewage and a small amount of flocculant, the flocculant cannot be uniformly mixed in the sewage. , directly with the sewage flow away, the precipitation effect is poor. Moreover, there is no cleaning device in the existing sewage treatment equipment, and the sewage treatment equipment that cannot be cleaned will accumulate a large amount of dirt in the long-term operation, which will affect the service life of the equipment.

Utility model content

In order to solve the above-mentioned problems existing in the prior art, the purpose of this utility model is to provide a sewage treatment equipment that can self-purify backflow sedimentation, so as to solve the problem of uneven mixing of flocculant and sewage in the prior art sewage treatment equipment, insufficient precipitation, and There are no technical problems with cleaning the device.

The technical scheme adopted by the utility model is as follows: a sewage treatment equipment capable of self-purification and backflow sedimentation, comprising a sedimentation tank and a sewage treatment tank, one end of the sedimentation tank is provided with a water inlet, and the end of the sewage treatment tank is provided with a drain port, The sedimentation tank and the sewage treatment tank are connected by a connecting pipe, a flocculant stirring device is arranged in the sedimentation tank, a sloping plate fixing frame is arranged on the inner wall of the bottom end of the sedimentation tank, and a sloping plate fixing frame is installed on the sloping plate fixing frame , a filter screen is provided in the middle of the sewage treatment tank, a cleaning device is provided on the side of the filter screen close to the sedimentation tank, a sponge plate is provided on the other side of the filter screen, and an oxygenation device is provided between the filter screen and the sponge plate, The front end of the sewage treatment tank is provided with a clean water inlet, the end of the sewage treatment tank is provided with a disinfectant addition port, and a return pipe is also arranged between the sewage treatment tank and the sedimentation tank.

Further, the flocculant stirring device includes a rotating shaft, a flocculant bin, a blade and a duct, the rotating shaft is rotatably connected to the inner wall of the sedimentation tank, the flocculant bin is fixedly connected to the rotating shaft, and the flocculant bin is provided with There are blades, and the blades are provided with conduits that communicate with the interior of the flocculant bin. The main purpose of the flocculant stirring device is to improve the mixing uniformity of the flocculant and the sewage. In order to achieve this purpose, a rotating shaft, a flocculant silo, a blade and a duct are set up. The rotating shaft is rotatably connected to the inner wall of the sedimentation tank. Support the flocculant silo, and secondly, it is used to drive the flocculant silo to rotate, and a motor can be set outside the sedimentation tank to provide driving force to the rotating shaft. The flocculant silo is mainly used to store the flocculant, the conduit is used to export the flocculant from the flocculant silo, the blades are used to fix the conduit and can stir the sewage, a plurality of blades and conduits are arranged on the flocculant silo, and the flocculant silo is rotating. The flocculant can be sprinkled from all directions, ensuring the uniformity of the flocculant delivery.

Further, the blades are evenly distributed on the flocculant bin, and a shower nozzle is provided at one end of the conduit exposed to the blades. The blades are evenly arranged on the flocculant silo to ensure the stirring degree of the sewage, so that the sewage and the flocculant are mixed more evenly, and the sedimentation effect of impurities in the sewage is improved. A shower nozzle is arranged at the end of the duct where the blades are exposed. The shower nozzle can allow the flocculant in the duct to be sprinkled into the sewage at multiple angles to further ensure that the flocculant is sprayed evenly.

Further, the cleaning device includes a motor, a rotating rod, a fan blade and a cleaning brush, the motor is fixedly arranged on the outside of the sewage treatment tank, a rotating rod is connected to the motor, and the rotating rod is located inside the sewage treatment tank, The middle part of the rotating rod is provided with a fan blade, and the end of the rotating rod is provided with a cleaning brush. The cleaning device is mainly used to clean the sewage treatment tank. It can be cleaned manually, or it can be automatically cleaned by setting the corresponding equipment. The motor mainly provides power for the rotating rod, the fan blade is used to agitate the clean water and improve the washing effect, and the cleaning brush is used to clean the sewage. Handling the equipment in the pool.

Further, the rotating rod is arranged at the center of the longitudinal section of the sewage treatment tank, and the cleaning brush is in contact with the filter screen. Since the cleaning brush will rotate with the rotating rod in the sewage treatment tank, if the rotating rod is set close to the inner wall of the sewage treatment tank, the cleaning range of the cleaning brush will be greatly limited. In order to ensure better cleaning effect, the rotating rod is set At the center of the longitudinal section of the sewage treatment tank, the cleaning brush can be set longer to improve the cleaning effect of the sewage treatment tank. The contact between the cleaning brush and the filter screen can clean the impurities on the filter screen and prevent impurities from clogging the filter screen.

Further, a water pump is also provided on the return pipe. Since the water after cleaning the sewage treatment tank will also become sewage, if it is directly discharged from the drainage port of the sewage treatment tank, it will pollute the treated water source. In order to treat the cleaned sewage, it is preferable to provide a return pipe. The main purpose of the return pipe is to pump the cleaned sewage back into the sedimentation tank for treatment, and the water pump provides the power to extract the return pipe.

Further, a sludge extraction pump is provided at the bottom of the sedimentation tank, a sludge discharge pipe is provided on one side of the bottom of the sedimentation tank, and the sludge extraction pump is connected with the sludge discharge pipe. Various impurities precipitated in the sedimentation tank will accumulate together to form sludge. If the sludge cannot be treated in time, when the sludge accumulates to a certain extent, it will flow to the sewage treatment tank with the connecting pipe, which will lose the meaning of sedimentation. , A sludge extraction pump is arranged at the bottom of the sedimentation tank. The sludge extraction pump is connected with a sludge discharge pipe. The sludge extraction pump can timely extract the impurities precipitated in the sedimentation tank and discharge it through the sludge discharge pipe.

Further, the connecting pipe is provided with a valve. The valve is mainly used to control the sewage in the sedimentation tank to flow into the sewage treatment tank. When the sewage treatment tank needs to be cleaned, the valve is closed; when it is working normally, the valve is opened.

The beneficial effects of the present utility model are:

1. By setting the flocculant stirring device, the sewage in the sedimentation tank can be fully contacted with the flocculant, the impurities in the sewage are precipitated to the greatest extent, and the working efficiency of sewage sedimentation is improved; by setting the cleaning device in the sewage treatment tank, it can be The sewage treatment tank is cleaned by the cleaning device to ensure the cleanliness of the sewage treatment tank, avoid long-term accumulated dirt from clogging the corresponding equipment, and prolong the service life of the device.

2. By setting the rotating shaft, flocculant silo, blades, ducts and shower head, the shaft drives the flocculant silo to rotate, the flocculant in the flocculant silo flows out from the duct on the blade, and finally sprayed into the sewage through the shower head to ensure flocculation. The spraying of the agent is uniform, and the rotating blades can stir the sewage, so that the flocculant is mixed with the sewage evenly, and the sedimentation effect is improved.

3. By setting the motor, rotating rod, fan blade and cleaning brush, the sewage treatment tank after work is cleaned. The motor drives the rotating rod to rotate, the rotating rod drives the fan blade and the cleaning brush to rotate, and the fan blade on the rotating rod drives the clean water. Rotate to wash the inner wall of the sewage treatment tank, the rotating rod drives the cleaning brush to wash the filter screen, and the impurities on the filter screen are cleaned to prevent the filter screen from being blocked.

4. By setting a return pipe and a water pump, the sewage after cleaning the sewage treatment tank is drawn into the sedimentation tank through the return pipe for sedimentation, and the cleaned sewage is recycled to avoid direct discharge of the cleaned sewage.

5. By setting up a sludge pump and a sludge discharge pipe, the sludge impurities precipitated in the sedimentation tank can be discharged in time to prevent the sludge from flowing into the sewage treatment tank through the connecting pipe.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

In the figure: 1-sedimentation tank; 2-sewage treatment tank; 3-water inlet; 4-rotating shaft; 5-flocculant bin; 6-blade; 7-duct; - inclined plate; 11- sludge extraction pump; 12- sludge discharge pipe; 13- connecting pipe; 14- valve; 15- motor; 16- rotating rod; 17- fan blade; 18- cleaning brush; 19- water pump; 20- Return pipe; 21-filter; 22-oxygenation device; 23-sponge plate; 24-disinfectant addition port; 25-drainage port; 26-clean water inlet.

Detailed ways

The present utility model will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

As shown in FIG. 1 , a sewage treatment equipment capable of self-cleaning and backflow sedimentation includes a sedimentation tank 1 and a sewage treatment tank 2. One end of the sedimentation tank 1 is provided with a water inlet 3, and the end of the sewage treatment tank 2 is provided with a drain outlet. 25. The sedimentation tank 1 and the sewage treatment tank 2 are connected by a connecting pipe 13. A flocculant stirring device is arranged in the sedimentation tank 1. A sloping plate fixing frame 9 is arranged on the inner wall of the bottom end of the sedimentation tank 1. A swash plate 10 is installed on the swash plate fixing frame 9, a filter screen 21 is provided in the middle of the sewage treatment tank 2, a cleaning device is provided on the side of the filter screen 21 close to the sedimentation tank 1, and a cleaning device is provided on the other side of the filter screen 21. The sponge plate 23, an oxygenation device 22 is arranged between the filter screen 21 and the sponge plate 23, a clean water inlet 26 is arranged at the front end of the sewage treatment tank 2, and a disinfectant addition port 24 is arranged at the end of the sewage treatment tank 2. A return pipe 20 is also provided between the sedimentation tank 1 .

Working principle: When the utility model is working, the sewage is first discharged into the sedimentation tank 1 from the water inlet 3, and the flocculant stirring device in the sedimentation tank 1 is turned on, and the flocculant stirring device evenly sprinkles the flocculant into the sewage. , and stir the sewage and the flocculant evenly, so that the impurities in the sewage are continuously adsorbed on the flocculant, and then form large particles, and then settle to the bottom of the sedimentation tank 1 through the inclined plate 10, and the sewage after sedimentation flows through the connecting pipe 13. In the sewage treatment tank 2, the water in the sewage treatment tank 2 is further filtered by the filter screen 21 and the sponge plate 23 after treatment, and the oxygenation device 22 provides sufficient oxygen for the sewage in the sewage treatment tank 2 to oxidize the sewage. Treat and ensure the oxygen content in the sewage, add disinfectant to the sewage from the disinfectant addition port 24 at the end of the sewage treatment tank 2, disinfect the sewage and perform deodorization treatment, and the treated sewage is discharged through the drain port 25. in nature. When the sewage treatment tank needs to be cleaned, close the connecting pipe 13 and the drain port 25, then add clean water to the sewage treatment tank through the clean water inlet 26, start the cleaning device, and clean the sewage treatment tank 2. After cleaning, the return pipe 20 will clean The last sewage is pumped into the sedimentation tank 1 for treatment, and then the connecting pipe 13 and the drain port 25 are opened to resume normal operation.

Example 2:

As a preferred solution of the present utility model, on the basis of Example 1, the flocculant stirring device includes a rotating shaft 4, a flocculant bin 5, a blade 6 and a conduit 7, and the rotating shaft 4 is rotatably connected to the inner wall of the sedimentation tank, The flocculant bin 5 is fixedly connected to the rotating shaft 4 , the flocculant bin 5 is provided with a blade 6 , and the blade 6 is provided with a conduit 7 communicating with the interior of the flocculant bin 5 . The main purpose of the flocculant stirring device is to improve the mixing uniformity of the flocculant and the sewage. In order to achieve this purpose, a rotating shaft 4, a flocculant silo 5, a blade 6 and a conduit 7 are provided, and the rotating shaft 4 is rotatably connected to the inner wall of the sedimentation tank 1. On the one hand, it is used to support the flocculant bin 5 , and the other is to drive the flocculant bin 5 to rotate. A motor can be provided outside the sedimentation tank 1 to provide driving force to the rotating shaft 4 . The flocculant bin 5 is mainly used to store the flocculant, the conduit 7 is used to guide the flocculant from the flocculant bin 5, the vane 6 is used to fix the conduit 7 and can stir the sewage, and a plurality of vanes 6 and The conduit 7 and the flocculant bin 5 can sprinkle the flocculant from all directions when rotating, and the flocculant is mixed with the sewage evenly by the stirring of the blade 6, which ensures the uniformity of the flocculant injection.

The blades 6 are evenly distributed on the flocculant bin 5 , and a shower head 8 is provided at one end of the conduit 7 exposed to the blades 6 . The blades 6 are evenly arranged on the flocculant bin 5, which ensures the stirring degree of the sewage, makes the mixing of the sewage and the flocculant more uniform, and improves the sedimentation effect of impurities in the sewage. The end of the conduit 7 exposed to the blade 6 is provided with a shower head 8. The shower head 8 can allow the flocculant in the conduit 7 to be sprinkled into the sewage at multiple angles to further ensure that the flocculant is sprayed evenly.

The flocculant bin 5 is installed on the rotating shaft 4, and the rotating shaft 4 can be set to be hollow and communicated with the flocculant bin 5 to continuously provide the flocculant to the flocculant bin 5, and the flocculant in the flocculant bin 5 can also be used for As a working cycle, the water inlet 3 is closed first after each working cycle, and then the flocculant in the flocculant bin 5 is filled up and continues to work. When the flocculant bin 5 rotates, the internal flocculant will be sprinkled into the sewage along the conduit 7 due to the centrifugal force. Of course, for better effect, a flocculant bin 5 can also be provided with an inflator to inflate the flocculant bin 5. A device that sprays the flocculant into the water in a high-pressure manner, the aeration device can directly adopt the existing technology, and those skilled in the art can decide whether to install the aeration device according to actual needs. In order to prevent the sewage from flowing back into the flocculant bin 5 during operation, a one-way valve can be installed on the conduit 7, and the one-way valve can use the existing technology, because the centrifugal force of the device will cause the flocculant to continuously flow to the flocculant during operation. Therefore, it is difficult for the sewage to enter the flocculant bin 5. Those skilled in the art can decide whether to add a one-way valve on the conduit 7 according to the actual situation.

Example 3:

As a preferred solution of the present invention, on the basis of Embodiment 1, the cleaning device includes a motor 15, a rotating rod 16, a fan blade 17 and a cleaning brush 18, and the motor 15 is fixedly arranged on the outside of the sewage treatment tank 2, A rotating rod 16 is connected to the motor, the rotating rod 16 is located inside the sewage treatment tank 2 , a fan blade 16 is provided in the middle of the rotating rod 16 , and a cleaning brush 18 is provided at the end of the rotating rod 16 . The cleaning device is mainly used to clean the sewage treatment tank 2. It can be cleaned manually or set up corresponding equipment for automatic cleaning. The motor 15 mainly provides power for the rotating rod 16. 18 is used to clean the equipment in the sewage treatment tank 2.

The rotating rod 16 is arranged at the center of the longitudinal section of the sewage treatment tank 2 , and the cleaning brush 18 is in contact with the filter screen 21 . Since the cleaning brush 18 will rotate in the sewage treatment tank 2 along with the rotating rod 16, if the rotating rod 16 is set close to the inner wall of the sewage treatment tank 2, the cleaning range of the cleaning brush 18 will be greatly restricted. To improve the cleaning effect, the rotating rod 16 is arranged at the center of the longitudinal section of the sewage treatment tank 2, so that the cleaning brush 18 can be set longer, and the cleaning effect of the sewage treatment tank 2 is improved. The contact between the cleaning brush 18 and the filter screen 21 can clean the impurities on the filter screen 21 and prevent the impurities from clogging the filter screen 21 .

Example 4:

As shown in FIG. 1 , a sewage treatment equipment capable of self-cleaning and backflow sedimentation includes a sedimentation tank 1 and a sewage treatment tank 2. One end of the sedimentation tank 1 is provided with a water inlet 3, and the end of the sewage treatment tank 2 is provided with a drain outlet. 25. The sedimentation tank 1 and the sewage treatment tank 2 are connected by a connecting pipe 13. A flocculant stirring device is arranged in the sedimentation tank 1. A sloping plate fixing frame 9 is arranged on the inner wall of the bottom end of the sedimentation tank 1. A swash plate 10 is installed on the swash plate fixing frame 9, a filter screen 21 is provided in the middle of the sewage treatment tank 2, a cleaning device is provided on the side of the filter screen 21 close to the sedimentation tank 1, and a cleaning device is provided on the other side of the filter screen 21. The sponge plate 23, an oxygenation device 22 is arranged between the filter screen 21 and the sponge plate 23, a clean water inlet 26 is arranged at the front end of the sewage treatment tank 2, and a disinfectant addition port 24 is arranged at the end of the sewage treatment tank 2. A return pipe 20 is also provided between the sedimentation tank 1 .

The flocculant stirring device includes a rotating shaft 4, a flocculant bin 5, a blade 6 and a conduit 7. The rotating shaft 4 is rotatably connected to the inner wall of the sedimentation tank, and the flocculant bin 5 is fixedly connected to the rotating shaft 4. The agent silo 5 is provided with a vane 6 , and a conduit 7 communicated with the inside of the flocculant silo 5 is arranged in the vane 6 .

The blades 6 are evenly distributed on the flocculant bin 5 , and a shower head 8 is provided at one end of the conduit 7 exposed to the blades 6 .

The cleaning device includes a motor 15, a rotating rod 16, a fan blade 17 and a cleaning brush 18. The motor 15 is fixedly arranged on the outside of the sewage treatment tank 2, and a rotating rod 16 is connected to the motor. Inside the sewage treatment tank 2 , a fan blade 16 is provided in the middle of the rotating rod 16 , and a cleaning brush 18 is provided at the end of the rotating rod 16 .

The rotating rod 16 is arranged at the center of the longitudinal section of the sewage treatment tank 2 , and the cleaning brush 18 is in contact with the filter screen 21 .

The return pipe 20 is also provided with a water pump 19 . Since the water after cleaning the sewage treatment tank 2 will also become sewage, if it is directly discharged from the drain port 25 of the sewage treatment tank 2, the treated water source will be polluted. A return pipe 20 is provided, and the return pipe 20 is mainly for pumping the cleaned sewage back into the sedimentation tank 1 for processing, and the water pump 19 provides the return pipe 20 with the power to extract.

A sludge extraction pump 11 is arranged at the bottom of the sedimentation tank 1 , a sludge discharge pipe 12 is arranged on one side of the bottom of the sedimentation tank 1 , and the sludge extraction pump 11 is connected with the sludge discharge pipe 12 . Various impurities precipitated in the sedimentation tank 1 will accumulate together to form sludge. If these sludges cannot be treated in time, when they accumulate to a certain extent, they will flow to the sewage treatment tank 2 along with the connecting pipe 13, thus losing the sedimentation. Meaning, preferably, a sludge extraction pump 11 is arranged at the bottom of the sedimentation tank 1, and a sludge discharge pipe 12 is connected to the sludge extraction pump 11. The sludge extraction pump 11 can timely extract the impurities deposited in the sedimentation tank 1 and pass the sludge. The discharge pipe 12 discharges.

The connecting pipe 13 is provided with a valve 14 . The valve 14 is mainly used to control the sewage in the sedimentation tank 1 to flow into the sewage treatment tank 2. When the sewage treatment tank 2 needs to be cleaned, the valve 14 is closed; during normal operation, the valve 14 is opened.

The device is provided with a flocculant stirring device to ensure that the sewage in the sedimentation tank 1 can be fully contacted with the flocculant, and the impurities in the sewage are precipitated to the greatest extent, and the working efficiency of sewage sedimentation is improved; The cleaning device can clean the sewage treatment tank after work through the cleaning device to ensure the cleanliness of the sewage treatment tank, avoid long-term accumulated dirt from clogging the corresponding equipment, and prolong the service life of the device.

In this device, the rotating shaft 4, the flocculant silo 5, the blade 6, the duct 7 and the shower head 8 are arranged. The rotating shaft 4 drives the flocculant silo 5 to rotate, and the flocculant in the flocculant silo 5 flows out from the duct 7 on the blade 6, and finally passes through the flocculant silo 5. The shower head 8 sprays the sewage to ensure the uniform spraying of the flocculant, and the rotating blades 6 can stir the sewage, so that the flocculant and the sewage are mixed evenly, and the sedimentation effect is improved.

The device cleans the sewage treatment tank after work by setting the motor 15, the rotating rod 16, the fan blade 14 and the cleaning brush 18. The motor 15 drives the rotating rod 16 to rotate, and the rotating rod 16 drives the fan blade 17 and the cleaning brush 18 to rotate. , the fan blade 17 on the rotating rod 16 drives the clean water to rotate to wash the inner wall of the sewage treatment tank 2, the rotating rod 16 drives the cleaning brush 18 to wash the filter screen 21, and cleans the impurities on the filter screen 21 to prevent the filter screen 21 blocked.

The device is provided with a return pipe 20 and a water pump 19, and the sewage after cleaning the sewage treatment tank is pumped into the sedimentation tank 1 through the return pipe 20 for sedimentation, and the cleaned sewage is recycled to avoid direct discharge of the cleaned sewage.

By setting the sludge extraction pump 11 and the sludge discharge pipe 12, the device can discharge the sludge impurities precipitated in the sedimentation tank in time to prevent the sludge from flowing into the sewage treatment tank 2 through the connecting pipe 13.

The suspended matter in the wastewater treated by the device of the utility model is lower than 70 mg/L, which meets the requirements of the national first-level discharge standard, and the detection of other corresponding indicators meets the requirements of the national second-level discharge standard.

The present utility model is not limited to the above-mentioned optional embodiments, and anyone can draw other various forms of products under the inspiration of the present utility model. The technical solutions within the scope defined by the claims all fall within the protection scope of the present invention.

Claims (8)

1. one kind can self-cleaning reflux precipitating sewage disposal device, including sedimentation basin (1) and treatment tank (2), feature exists In: described sedimentation basin (1) one end is provided with water inlet (3), and treatment tank (2) end is provided with discharge outlet (25), institute It states sedimentation basin (1) and treatment tank (2) to connect by connecting tube (13), flocculant stirring is provided in the sedimentation basin (1) Device is provided with inclined plate fixed frame (9) on the inner wall of sedimentation basin (1) bottom end, is equipped with inclined plate on the inclined plate fixed frame (9) (10), it is provided with filter screen (21) in the middle part of the treatment tank (2), side of the filter screen (21) close to sedimentation basin (1) It is provided with cleaning device, filter screen (21) other side is provided with sponge plate (23), sets between filter screen (21) and sponge plate (23) It is equipped with oxygenate apparatus (22), treatment tank (2) front end is provided with clear water entrance (26), and treatment tank (2) end is provided with Disinfectant adding mouth (24) is additionally provided with return pipe (20) between the treatment tank (2) and sedimentation basin (1).

2. one kind according to claim 1 can self-cleaning reflux precipitating sewage disposal device, it is characterised in that: the flocculation Agent agitating device includes shaft (4), flocculant storehouse (5), blade (6) and conduit (7), and the shaft (4) is rotatably connected on precipitating On the inner wall in pond, the flocculant storehouse (5) is fixedly connected on shaft (4), is provided with blade (6) on the flocculant storehouse (5), The conduit (7) for being provided in the blade (6) and being connected to inside flocculant storehouse (5).

3. one kind according to claim 2 can self-cleaning reflux precipitating sewage disposal device, it is characterised in that: the blade (6) it is evenly distributed on flocculant storehouse (5), one end that the conduit (7) exposes blade (6) is provided with seedpod of the lotus spray head (8).

4. one kind according to claim 1 can self-cleaning reflux precipitating sewage disposal device, it is characterised in that: the cleaning Device includes motor (15), rotating bar (16), flabellum (17) and cleaning brush (18), and the motor (15) is fixed at sewage The outside of pond (2) to be managed, is connected with rotating bar (16) on the motor, the rotating bar (16) is located at treatment tank (2) inside, It is provided with flabellum (16) in the middle part of the rotating bar (16), rotating bar (16) end is provided with cleaning brush (18).

5. one kind according to claim 4 can self-cleaning reflux precipitating sewage disposal device, it is characterised in that: the rotation Bar (16) is set at the center for the treatment of tank (2) longitudinal section, and the cleaning brush (18) is in contact with filter screen (21).

6. one kind according to claim 1 can self-cleaning reflux precipitating sewage disposal device, it is characterised in that: the reflux Water pump (19) are additionally provided on pipe (20).

7. one kind according to claim 1 can self-cleaning reflux precipitating sewage disposal device, it is characterised in that: the precipitating Pond (1) bottom is provided with sludge extraction pump (11), and sedimentation basin (1) bottom side is provided with mud delivery pipe (12), described Sludge extraction pump (11) is connect with mud delivery pipe (12).

8. one kind according to claim 1 can self-cleaning reflux precipitating sewage disposal device, it is characterised in that: the connection Valve (14) are provided on pipe (13).