CN212924552U

CN212924552U - Circular anoxic tank with slag skimming function

Info

Publication number: CN212924552U
Application number: CN202020964795.9U
Authority: CN
Inventors: 张显忠; 张伟; 丁蓟羽; 张扬
Original assignee: Shanghai Urban Construction Design Research Institute Group Co Ltd
Current assignee: Shanghai Urban Construction Design Research Institute Group Co Ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-04-09
Anticipated expiration: 2030-06-01

Abstract

The utility model discloses a circular anoxic tank with a skimming function, which at least comprises an anoxic tank, a water inlet pipe, a return sludge pipe, a mixed liquid return pipe, a water outlet pipe, a slag discharge pipe, a blow-down pipe, a flow impeller, a water outlet weir, a driving motor, a floating screw, a scum collecting hopper, a steady flow cylinder and a reverse hanging membrane; the water inlet pipe, the return sludge pipe and the mixed liquid return pipe are communicated with the anoxic tank through the flow stabilizing cylinder, the flow impeller is arranged in the anoxic tank, the driving motor is connected with the scum collecting hopper through the floating screw rod, and the reverse hanging membrane is arranged on the upper portion of the anoxic tank. The utility model discloses not only can realize quick and efficient automatic slag removal, reduce personnel working strength and clear away the blind area, can also reduce the operating cost of sewage factory.

Description

Circular anoxic tank with slag skimming function

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a take circular oxygen deficiency pond of skimming function.

Background

In recent years, with the rapid development of urbanization in China, the water environment problem is increasingly prominent. In order to improve the surface water environmental quality of China, related departments of China and places successively produce a series of guiding documents, and partial regions require pollutant discharge standards of urban sewage treatment plants to reach the surface water environmental quality III-class water quality. The anoxic tank is used as a key process for sewage denitrification treatment, and the operation condition of the anoxic tank has important influence on whether the effluent water quality of the sewage treatment plant reaches the standard. In the sewage treatment process, if a large amount of floating slag appears on the surface of the anoxic tank, the problems of inspection, equipment maintenance, a series of environmental sanitation and the like are influenced, and the effluent quality is deteriorated due to the increase of the content of suspended matters in the effluent. In order to solve the scum on the surface of the anoxic pond, the main countermeasure adopted in various regions of China at present is manual dredging. The mode is time-consuming and labor-consuming, and is very difficult to remove the scum far away from the position of the routing inspection walkway, and the operating cost of a sewage plant can be increased.

How to play the water distribution flow state and uniform reaction of the circular anoxic tank, quickly and efficiently remove scum on the surface of the anoxic tank, reduce the working strength of personnel and remove blind areas is one of the important subjects to be solved at present.

The person skilled in the art is dedicated to solving the above technical drawbacks.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, the technical purpose of the present invention is to solve the problems mentioned in the background art.

In order to realize the technical purpose, the utility model provides a circular anoxic tank with a skimming function, which at least comprises an anoxic tank, a water inlet pipe, a return sludge pipe, a mixed liquid return pipe, a water outlet pipe, a slag discharge pipe, an emptying pipe, a flow pushing device, a water outlet weir, a driving motor, a floating screw, a scum collecting hopper, a flow stabilizing cylinder and a reverse hanging membrane;

the water inlet pipe, the return sludge pipe and the mixed liquid return pipe are communicated with the anoxic tank through the flow stabilizing cylinder, the flow impeller is arranged in the anoxic tank, the driving motor is connected with the scum collecting hopper through the floating screw rod, and the reverse hanging membrane is arranged on the upper portion of the anoxic tank.

Preferably, the shape of the anoxic tank is circular.

Preferably, the floating screw and the scum collecting hopper are of an integrated structure.

Preferably, the floating screw can automatically skim at regular time.

Preferably, the flow pusher can run automatically at regular time.

The utility model has the advantages that:

the utility model discloses because above-mentioned structural design not only can realize quick and efficient automatic slag removal, reduce personnel working strength and clear away the blind area, can also reduce the operating cost of sewage factory.

Drawings

Fig. 1 is a schematic plan view of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic cross-sectional view taken along line B-B in fig. 1.

In the figure: the device comprises an anoxic tank 1, a water inlet pipe 2, a return sludge pipe 3, a mixed liquid return pipe 4, a water outlet pipe 5, a slag discharge pipe 6, a vent pipe 7, a flow impeller 8, a water outlet weir 9, a driving motor 10, a floating screw rod 11, a scum collecting hopper 12, a flow stabilizing cylinder 13 and a reverse hanging membrane 14.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Example (b):

as shown in fig. 1-3, a circular anoxic tank with a skimming function comprises an anoxic tank 1, a water inlet pipe 2, a return sludge pipe 3, a mixed liquid return pipe 4, a water outlet pipe 5, a slag discharge pipe 6, an emptying pipe 7, a flow pushing device 8, a water outlet weir 9, a driving motor 10, a floating screw 11, a scum collecting hopper 12, a flow stabilizing cylinder 13 and a reverse hanging membrane 14.

The sewage, the return mixed liquor and the return sludge enter the anoxic tank 1 after being respectively rectified by the water inlet pipe 2, the mixed liquor return pipe 4 and the return sludge pipe 3 through the flow stabilizing cylinder 13, and nitrate nitrogen in the sewage is reduced into nitrogen under the action of heterotrophic denitrifying bacteria, so that the denitrification of the sewage is realized; the denitrified sewage enters the water outlet pipe 5 through the water outlet weir 9 and then enters the subsequent reaction tank to further reduce other pollutants; in order to ensure that the sewage, the mixed liquid and the return sludge are fully mixed and avoid the return sludge from depositing at the bottom of the tank, a flow impeller 8 is arranged inside the anoxic tank 1; if scum appears on the surface of the anoxic tank 1 in the operation process, the floating screw 11 can bring the scum into a scum collecting hopper 12 under the action of a driving motor 10 and then discharge the scum out through a scum pipe 6; if the interior of the anoxic tank 1 needs to be overhauled and maintained, the internal sewage and sludge can be discharged outside through the emptying pipe 7; in order to prevent the bad smell generated during the operation of the anoxic tank 1 from affecting the environment, a reverse hanging membrane 14 is provided at the upper part of the anoxic tank 1.

Specifically, the anoxic tank 1 is circular, and a good hydraulic flow state can be formed.

In particular, the floating screw 11 is capable of timed automatic skimming.

Specifically, the floating screw 11 and the scum collecting hopper 12 are of an integral structure.

In particular, the flow pusher 8 is capable of automatic operation at regular times.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a take circular oxygen deficiency pond of skimming function which characterized in that: the device at least comprises an anoxic tank, a water inlet pipe, a return sludge pipe, a mixed liquid return pipe, a water outlet pipe, a slag discharge pipe, an emptying pipe, a flow impeller, a water outlet weir, a driving motor, a floating screw, a scum collecting hopper, a flow stabilizing cylinder and a reverse hanging membrane; the water inlet pipe, the return sludge pipe and the mixed liquid return pipe are communicated with the anoxic tank through the flow stabilizing cylinder, the flow impeller is arranged in the anoxic tank, the driving motor is connected with the scum collecting hopper through the floating screw rod, and the reverse hanging membrane is arranged on the upper portion of the anoxic tank.

2. The circular anoxic tank with a skimming function according to claim 1, characterized in that: the shape of the anoxic pond is circular.

3. The circular anoxic tank with a skimming function according to claim 1, characterized in that: the floating screw and the scum collecting hopper are of an integrated structure.