CN213652010U

CN213652010U - Sewage treatment device

Info

Publication number: CN213652010U
Application number: CN202022551698.XU
Authority: CN
Inventors: 徐云倩
Original assignee: Chengdu Baisen Environmental Protection Technology Co ltd
Current assignee: Chengdu Baisen Environmental Protection Technology Co ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-07-09
Anticipated expiration: 2030-11-06

Abstract

The utility model discloses a sewage treatment device, which relates to the technical field of sewage treatment and comprises a reaction tank, an aeration system and a reflux system; an aerobic reaction zone and an anoxic reaction zone which are communicated with each other are arranged in the reaction tank; the aeration system is arranged at the bottom of the aerobic reaction zone and is used for aerating the aerobic reaction zone; the reflux system comprises a reflux pump, a reflux main pipe and a plurality of first reflux branch pipes, wherein the reflux pump is arranged at the tail part of the aerobic reaction zone, a water outlet of the reflux pump and one end of each first reflux branch pipe are communicated with the reflux main pipe, the other end of each first reflux branch pipe is arranged at the bottom of the tank far away from one end of the first partition plate in the anoxic reaction zone, and a pipe orifice of each first reflux branch pipe is arranged towards the direction of the first partition plate. When the device is used, the returned nitrified liquid directly forms water flow at the bottom of the anoxic reaction zone, so that sludge cannot be accumulated, and meanwhile, dissolved oxygen in the nitrified liquid can supplement oxygen to the part, close to the bottom of the anoxic reaction zone, so that denitrification reaction tends to be balanced, and the effect and efficiency of sewage treatment are improved.

Description

Sewage treatment device

Technical Field

The utility model relates to a sewage treatment technical field specifically is a sewage treatment device.

Background

The existing sewage treatment method mainly comprises the following steps: the oxidation ditch method, the SBR method, the CASS method, the activated sludge method, the anoxic and aerobic process method and the like, wherein the anoxic and aerobic process method has relatively low construction and operation cost and wide application range because the process is relatively simple, a carbon source and a post-aeration tank are not required to be added, and the raw sewage is used as the carbon source. In the AO pond of the prior art, an aerobic reaction zone of the AO pond has aeration airflow to stir the bottom of the AO pond, so that the problem of sludge accumulation at the bottom of the AO pond is not needed to be worried about, but the anoxic reaction zone does not have aeration airflow, and sediments after reaction are often accumulated at the bottom of the AO pond to influence the smooth operation of the reaction, and the AO pond is required to be cleaned regularly. At present, aiming at the problem of sludge accumulation at the bottom of an anoxic reaction zone, stirring equipment is usually added, which undoubtedly increases equipment investment and operation cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a sewage treatment device, the backward flow is to the direct pond bottom that forms rivers in this oxygen deficiency reaction zone of nitrifying liquid in oxygen deficiency reaction zone for mud can't pile up at the oxygen deficiency reaction zone pond bottom, nitrify simultaneously in the liquid dissolved oxygen can be pertinence to the partial oxygenating of oxygen deficiency reaction zone near the pond bottom, make the oxygen deficiency reaction zone pond bottom more tend to the equilibrium with the denitrification of pool face, promote sewage treatment's effect and efficiency.

The purpose of the utility model is realized through the following technical scheme:

a sewage treatment device comprises a reaction tank, an aeration system, a reflux system and a water inlet pipe;

a first partition plate is arranged in the reaction tank, the first partition plate divides the interior of the reaction tank into an aerobic reaction zone and an anoxic reaction zone which are communicated with each other, and an outlet of the water inlet pipe is arranged at the top of one end of the anoxic reaction zone, which is far away from the aerobic reaction zone;

the aeration system comprises an air blower and an aeration disc, the aeration disc is arranged at the bottom of the aerobic reaction zone, and an air outlet of the air blower is communicated with the aeration disc;

the reflux system comprises a reflux pump, a reflux main pipe and a plurality of first reflux branch pipes, wherein the reflux pump is arranged at the tail part of the aerobic reaction zone, a water outlet of the reflux pump and one ends of the first reflux branch pipes are communicated with the reflux main pipe, the other ends of the first reflux branch pipes are arranged at the bottom of the anoxic reaction zone far away from one end of the first partition plate, and pipe orifices of the first reflux branch pipes face towards the direction of the first partition plate.

Further, the reaction tank comprises a front side wall and a rear side wall which are oppositely arranged, the bottom end of the first partition plate is fixedly connected with the bottom of the reaction tank, one side of the first partition plate is fixedly connected with the rear side wall, and a circulation channel is formed between the other side of the first partition plate and the front side wall;

the bottom end of the second partition plate is fixedly connected with the bottom of the reaction tank, one side of the second partition plate is fixedly connected with the front side wall, and a circulation channel is formed between the other side of the second partition plate and the rear side wall;

the first partition plates are arranged alternately with the second partition plates.

Further, the aeration disc is arranged between the first partition plate and the second partition plate, aeration branch pipes are communicated with the aeration disc, and the air outlet of the air blower and the aeration branch pipes are communicated with the aeration main pipe.

Furthermore, the bottom of the anoxic reaction zone is provided with a first inclined plane, the height of the first inclined plane is gradually reduced towards the first partition plate, and the pipe orifice of the first return branch pipe inclines towards the first partition plate along the first inclined plane.

Further, the bottom of the pool in oxygen deficiency reaction zone is close to the one end of first baffle is provided with the second inclined plane, the height on second inclined plane is less than the height on first inclined plane, the second inclined plane to the high one end top that circulates the passageway direction height reduces gradually, the high one end top in second inclined plane position is provided with second backward flow branch pipe, the mouth of pipe of second backward flow branch pipe is followed the slope of second inclined plane is towards the circulation passageway, the other end of second backward flow branch pipe with the backward flow is responsible for the intercommunication.

Furthermore, a plurality of the first backflow branch pipes are arranged side by side at equal intervals.

The utility model has the advantages that:

the sewage treatment device comprises a reaction tank, an aeration device, a reflux system and a water inlet pipe, wherein the reaction tank is divided into an anoxic reaction zone and an aerobic reaction zone which are communicated with each other, the aeration device is arranged below the aerobic reaction zone, and sludge accumulation can not occur under the disturbance of aeration airflow. The nitrified liquid after the aerobic reaction returns to the anoxic reaction zone for circular treatment under the action of a reflux system, and a nitrified liquid outlet is arranged at the bottom of the anoxic reaction zone and faces the aerobic reaction zone during reflux, so that on one hand, the refluxed nitrified liquid forms a flowing liquid layer at the bottom of the anoxic reaction zone, and sludge is prevented from accumulating at the bottom of the anoxic reaction zone; on the other hand, the dissolved oxygen contained in the reflux digestive juice carries out targeted oxygen supplementation on the water body at the bottom of the anoxic reaction zone, so that the reaction process of the anoxic reaction zone tends to be balanced, and the reaction efficiency is favorably improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a sewage treatment apparatus of the present invention;

FIG. 2 is a schematic diagram of the internal structure of a reaction tank in a sewage treatment plant.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

As shown in fig. 1 to 2, a sewage treatment apparatus includes a reaction tank 100, an aeration system, a reflux system, and a water inlet pipe 400. The reaction tank 100 is provided therein with a first partition plate 101, and the first partition plate 101 partitions the inside of the reaction tank into an aerobic reaction zone 120 and an anoxic reaction zone 110 which are communicated with each other. The outlet of the water inlet pipe 400 is arranged at the top of one end of the anoxic reaction zone 110 far away from the aerobic reaction zone 120, and is used for introducing sewage to be treated into the reaction tank 100. The aeration system comprises an air blower 200 and an aeration disc 220, the aeration disc 220 is arranged at the bottom of the aerobic reaction zone 120, and an air outlet of the air blower 200 is communicated with the aeration disc 220. The reflux system comprises a reflux pump 300, a reflux main pipe 310 and a plurality of first reflux branch pipes 330, wherein the reflux pump 300 is arranged at the tail part of the aerobic reaction zone 120, the water outlet of the reflux pump 300 and one end of each first reflux branch pipe 330 are both communicated with the reflux main pipe 310, the other end of each first reflux branch pipe 330 is arranged at the bottom of the tank at one end, far away from the first partition plate 101, of the anoxic reaction zone 110, and the pipe orifices of the first reflux branch pipes 330 are arranged towards the direction of the first partition plate 101.

When the device is used for sewage treatment, sewage flows into the anoxic reaction zone 110 from the water inlet pipe 400 and is treated by anoxic microorganisms, then flows into the aerobic reaction zone 120 and is treated by aerobic microorganisms, nitrified liquid subjected to aerobic treatment is pumped back to the anoxic reaction zone 110 by the return pump 300, and the sewage can achieve a better treatment effect under the circulation. In the treatment process, the blower 200 sends the outside air into the bottom of the aerobic reaction zone 120 through the aeration plate 220 to provide sufficient dissolved oxygen for the aerobic reaction, and meanwhile, the aeration air flow can stir the bottom of the aerobic reaction zone 120 to prevent sludge from accumulating at the bottom of the aerobic reaction zone. The reflux pump 300 is a submersible pump, which is disposed at the tail of the aerobic reaction zone 120, and pumps the nitrified liquid treated by aerobic microorganisms back to the anoxic reaction zone for circular treatment. When the pump returns, the nitrified liquid flows to the first return branch pipe 330 through the return main pipe 310 and is discharged from the bottom pipe orifice of the first return branch pipe 330, and the discharged nitrified liquid forms a flowing layer at the bottom of the anoxic reaction area, so that the phenomenon of sludge deposition in the anoxic reaction area can be effectively avoided. Through research, the anoxic reaction needs to achieve a better reaction effect, the dissolved oxygen content needs to be maintained at 1.2-2.5mg/L, the water body at the top part of the pool can be supplemented by the oxygen in the air on the water surface, and the dissolved oxygen content of the water body at the bottom part of the pool is often insufficient. By adopting the arrangement, the returned nitrified liquid contains certain dissolved oxygen, and certain dissolved oxygen can be supplemented to the water body at the bottom of the tank in a targeted manner, so that the reaction of the top and the bottom of the tank in the anoxic reaction zone is relatively balanced, and the reaction efficiency is more favorably improved.

During specific implementation, a plurality of first return branch pipes 330 are equidistantly arranged at the end part of the anoxic reaction zone 110 far away from the aerobic reaction zone 120 in parallel, and are distributed at equal intervals, so that nitrified liquid flows back more evenly, sludge is further prevented from being accumulated at the bottom of the anoxic reaction zone 110, dissolved oxygen in returned digestive juice is fully utilized, and the sewage treatment efficiency is improved.

In implementation, the reaction tank 100 includes a front side wall and a rear side wall which are oppositely disposed, the bottom end of the first partition plate 101 is fixedly connected to the bottom of the reaction tank 100, one side of the first partition plate 101 is fixedly connected to the rear side wall, and a flow channel is formed between the other side of the first partition plate 101 and the front side wall, so that the anoxic reaction 110 is communicated with the aerobic reaction zone 120.

The first inclined plane 111 is arranged at the bottom of the anoxic reaction zone 110, the height of the first inclined plane 111 gradually decreases towards the first partition board 101, and the pipe orifice of the first return branch pipe 330 inclines towards the first partition board 101 along the first inclined plane 111. By arranging the first inclined plane 111, even if the water flow discharged from the outlet of the first return branch pipe 330 is not enough to prevent the sediment from falling, the sediment falling on the inclined plane 111 will move towards the aerobic reaction zone 120 along the inclined plane under the driving of the water flow, thereby further ensuring that the sludge is not accumulated at the bottom of the anoxic reaction zone 110.

The second inclined plane 112 is arranged at one end of the bottom of the anoxic reaction zone 110 close to the first partition 101, the height of the second inclined plane 112 is lower than that of the first inclined plane 111, and when the water flow discharged from the outlet of the first return branch pipe 330 is insufficient, the sediments guided by the first inclined plane 111 will move towards the second inclined plane 112. The height of the second inclined plane 112 gradually decreases towards the direction of the flow channel, a second return branch pipe 320 is arranged above the high end of the second inclined plane 112, the pipe orifice of the second return branch pipe 320 inclines towards the flow channel along the second inclined plane 112, and the other end of the second return branch pipe 320 is communicated with the return main pipe 310. Similarly, the second inclined plane 112 and the second backflow branch pipe 320 are both arranged to further ensure that the sediments possibly occurring in the anoxic reaction zone 110 flow into the aerobic reaction zone 120, so as to solve the trouble of the accumulation at the bottom of the reaction tank 100.

The sewage treatment device also comprises a plurality of second partition plates 102, the bottom ends of the second partition plates 102 are fixedly connected with the bottom of the reaction tank 100, one side of each second partition plate 102 is fixedly connected with the front side wall, and a circulation channel is formed between the other side of each second partition plate 102 and the rear side wall. The first partition boards 101 are arranged alternately with the second partition boards 102, and a zigzag sewage flow passage is formed in the aerobic reaction zone 120 to lengthen the flow path of the sewage during aerobic treatment, so that the whole device has a more compact structure, and the volume and the floor area are reduced. In practice, the aeration discs 220 are arranged between the first partition plate 101 and the second partition plate 102, the aeration discs 220 are communicated with the aeration branch pipes 230, the aeration main pipe 210 is further included, the air outlet of the air blower 200 and the aeration branch pipes 230 are communicated with the aeration main pipe 210, and each area of the zigzag sewage flow passage is aerated to provide sufficient oxygen and ensure the effect of sewage aerobic treatment.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A sewage treatment device is characterized by comprising a reaction tank (100), an aeration system, a reflux system and a water inlet pipe (400);

a first partition plate (101) is arranged in the reaction tank (100), the first partition plate (101) divides the inner part of the reaction tank into an aerobic reaction zone (120) and an anoxic reaction zone (110) which are communicated with each other, and an outlet of the water inlet pipe (400) is arranged at the top of one end, far away from the aerobic reaction zone (120), of the anoxic reaction zone (110);

the aeration system comprises a blower (200) and an aeration disc (220), the aeration disc (220) is arranged at the bottom of the aerobic reaction zone (120), and an air outlet of the blower (200) is communicated with the aeration disc (220);

the return-flow system includes that backwash pump (300), backward flow are responsible for (310), a plurality of first backward flow branch pipe (330), backwash pump (300) set up in the afterbody of aerobic reaction district (120), the delivery port of backwash pump (300) with the one end of first backward flow branch pipe (330) all with backward flow is responsible for (310) intercommunication, the other end of first backward flow branch pipe (330) set up in anoxic reaction district (110) is kept away from the bottom of the pool of first baffle (101) one end, the mouth of pipe orientation of first backward flow branch pipe (330) first baffle (101) direction sets up.

2. The sewage treatment device according to claim 1, wherein the reaction tank (100) comprises a front side wall and a rear side wall which are oppositely arranged, the bottom end of the first partition plate (101) is fixedly connected with the bottom of the reaction tank (100), one side of the first partition plate (101) is fixedly connected with the rear side wall, and a flow passage is formed between the other side of the first partition plate (101) and the front side wall;

the reaction tank also comprises a plurality of second partition plates (102), the bottom ends of the second partition plates (102) are fixedly connected with the bottom of the reaction tank (100), one side of each second partition plate (102) is fixedly connected with the front side wall, and a flow channel is formed between the other side of each second partition plate (102) and the rear side wall;

the number of the first partition plates (101) is several, and the first partition plates (101) and the second partition plates (102) are alternately arranged.

3. The sewage treatment device according to claim 2, wherein the aeration disc (220) is disposed between the first partition (101) and the second partition (102), the aeration disc (220) is provided with a branch aeration pipe (230) in communication, and the sewage treatment device further comprises a main aeration pipe (210), and the air outlet of the blower (200) and the branch aeration pipe (230) are both in communication with the main aeration pipe (210).

4. The sewage treatment device according to claim 2, wherein the bottom of the anoxic reaction zone (110) is provided with a first inclined plane (111), the height of the first inclined plane (111) gradually decreases towards the first partition (101), and the pipe orifice of the first return branch pipe (330) inclines towards the first partition (101) along the first inclined plane (111).

5. The sewage treatment device according to claim 4, wherein a second inclined plane (112) is arranged at one end of the bottom of the anoxic reaction zone (110) close to the first partition plate (101), the height of the second inclined plane (112) is lower than that of the first inclined plane (111), the height of the second inclined plane (112) is gradually reduced towards the direction of the flow channel, a second return branch pipe (320) is arranged above one end of the second inclined plane (112) at a high position, the pipe orifice of the second return branch pipe (320) is inclined towards the flow channel along the second inclined plane (112), and the other end of the second return branch pipe (320) is communicated with the return main pipe (310).

6. The wastewater treatment plant according to claim 1, wherein said first return branches (330) are arranged side by side at equal distances.