CN107235554B

CN107235554B - Oxygen deficiency pond for sewage treatment

Info

Publication number: CN107235554B
Application number: CN201710433856.1A
Authority: CN
Inventors: 杨庆彬; 杨红军; 唐辛亮; 王贵题; 彭军山; 刘金亮; 陈国超; 瓮文国; 朱长军; 董凤杰; 屈国园; 邵毅; 王逊
Original assignee: Tangshan Shougang Jingtang Xishan Coking Co ltd; Shougang Jingtang United Iron and Steel Co Ltd
Current assignee: Tangshan Shougang Jingtang Xishan Coking Co ltd; Shougang Jingtang United Iron and Steel Co Ltd
Priority date: 2017-06-09
Filing date: 2017-06-09
Publication date: 2021-01-26
Anticipated expiration: 2037-06-09
Also published as: CN107235554A

Abstract

The invention belongs to the technical field of sewage treatment, and discloses an anoxic tank for sewage treatment, which comprises: an anoxic tank body and a tank bottom stirring unit; the tank bottom stirring unit is arranged at the bottom of the anoxic tank body. The invention provides an anoxic tank for sewage treatment, which can improve the mixing degree of biochemical sludge and sewage in the anoxic tank.

Description

Oxygen deficiency pond for sewage treatment

Technical Field

The invention relates to the technical field of sewage treatment, in particular to an anoxic tank for sewage treatment.

Background

In conventional wastewater treatment systems, anoxic tanks are an important treatment environment. The device is mainly used for loading fillers to realize mud-water mixing, and aims to increase the contact time and contact area between biochemical sludge for sewage treatment and water.

The applicant finds that a large amount of mud is easy to be hung due to long-term operation of the filler, the mud in the filler is difficult to directly contact with return water or incoming water along with increase of the mud hanging amount, and the mud and the water are difficult to be fully mixed, so that short flow or dead mud accumulation is caused, and the denitrification effect is seriously influenced; and the risk of collapse is generated due to the increase of the load of the filler support.

Disclosure of Invention

The invention provides an anoxic tank for sewage treatment, which solves the technical problems that biochemical sludge for sewage treatment and sewage are difficult to be fully mixed and have safety risk in the prior art.

In order to solve the technical problem, the invention provides an anoxic tank for sewage treatment, which comprises: an anoxic tank body and a tank bottom stirring unit; the tank bottom stirring unit is arranged at the bottom of the anoxic tank body.

Furthermore, a water inlet pipe is arranged on one side of the anoxic tank body, and the pipe orifice of the water inlet pipe is positioned at the bottom of the anoxic tank body; a water outlet is formed in the upper part of the anoxic tank body;

the tank bottom stirring unit is arranged on two sides of the pipe orifice of the water inlet pipe.

Furthermore, the water outlet is arranged at the upper part of the anoxic pond body and is farthest away from the pipe orifice of the water inlet pipe.

Furthermore, the pool bottom stirring unit is arranged on two sides of a connecting line between the pipe orifice of the water inlet pipe and the water outlet.

Further, the water outlet includes: a plurality of outlet nozzles having different heights;

the plurality of water outlet ports are arranged on the side wall of the anoxic pond body, and the height of the plurality of water outlet ports is gradually increased from far to near according to the distance from the pipe orifice of the water inlet pipe.

Furthermore, the pool bottom stirring units arranged at the two sides of the connecting line of the pipe orifice of the water inlet pipe and the water outlet are arranged in a staggered manner.

Further, the oxygen deficiency pond body is the rectangle cell body, includes: a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall;

the first side wall and the third side wall are arranged oppositely, and the second side wall and the fourth side wall are arranged oppositely; the second sidewall is connected between the first sidewall and the third sidewall, and the fourth sidewall is connected between the first sidewall and the third sidewall.

Furthermore, a water inlet pipe is arranged at the connecting part of the first side wall and the second side wall, and the pipe orifice of the water inlet pipe is positioned at the bottom of the anoxic pond body;

the upper part of the third side wall is provided with a plurality of water outlets with different heights, and the heights of the water outlets are gradually increased from far to near according to the distance from the pipe orifice of the water inlet pipe.

Further, the bottom of the pool agitator set includes: a first row of stirrers arranged at the lower part of the first side wall and a second row of stirrers arranged at the lower part of the third side wall;

the first row of stirrers and the second row of stirrers are arranged in a staggered manner.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

the anoxic tank for sewage treatment provided by the embodiment of the application reforms the anoxic tank structure at the anoxic section for sewage treatment, and adopts the structural form that the anoxic tank with the tank bottom stirring unit arranged at the lower part of the anoxic tank is used for replacing the filler anoxic tank, so that on one hand, the defect of insufficient mixing of biochemical sludge and sewage caused by excessive filler sludge hanging can be avoided, and the problems of formation of a local anoxic zone, low water flow disturbance and insufficient mixing of drowned water can also be avoided; on the other hand, through setting up bottom of the pool stirring unit in oxygen deficiency pond body bottom, can strengthen the removal of pond sewage and biochemical mud to make biochemical mud and sewage can the intensive mixing, thereby strengthen sewage treatment efficiency.

Further, through setting up the bottom of the pool stirring unit in the orificial both sides of inlet tube for sewage just can stir the removal under the effect of mixer after getting into the oxygen deficiency pond, thereby makes mixing efficiency higher, mixes more fully.

Further, the moving path of sewage in the anoxic tank can be prolonged by arranging the water outlet at the farthest end of the anoxic tank body away from the pipe orifice of the water inlet pipe, so that the mixing reaction time is prolonged, and good treatment efficiency is achieved. Furthermore, a plurality of water outlets with height steps are arranged, and the height of the water outlets is gradually increased from far to near, so that the drainage end is always at the farthest end, the reaction time is ensured, and the treatment effect is improved; the overflow weir in the existing structure can be replaced, and the problem of uneven drainage is solved.

Drawings

Fig. 1 is a schematic structural diagram of an anoxic tank for sewage treatment according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1 according to an embodiment of the present invention;

fig. 3 is a schematic view of a water outlet structure provided in the embodiment of the present invention.

Detailed Description

The embodiment of the application provides the anoxic tank for sewage treatment, and solves the technical problems that biochemical sludge for sewage treatment and sewage are difficult to fully mix and have safety risks in the prior art; the technical effects of improving the muddy water mixing degree and avoiding safety risks are achieved.

In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.

In the prior art, in the sewage treatment process, the main link of the anoxic section is the sludge-water mixing treatment process in the anoxic tank; the method mainly comprises the steps of attaching biochemical sludge through a filler in an anoxic tank, and then introducing sewage to be treated for full mixing, and the method mainly aims at increasing the contact time and contact area of the biochemical sludge and the sewage. However, due to the long-term operation of the filler, a large amount of mud is easy to hang, the internal mud is difficult to directly contact with backflow water or incoming water along with the increase of the mud amount, the sufficient mixing of the mud and the water is difficult to realize only through stirring, the short flow or dead mud accumulation phenomenon is caused, the denitrification effect is seriously influenced, and meanwhile, the problem of collapse is caused due to the increase of the load of the filler support.

In view of this, this embodiment proposes a new anoxic tank structure for sewage treatment, and innovations of the anoxic tank structure and process.

Example one

Referring to fig. 1, an anoxic tank for sewage treatment includes: an anoxic tank body 1 and tank bottom stirring units (5, 6); the tank bottom stirring unit is arranged at the bottom of the anoxic tank body 1.

Particularly, bottom of the pool stirring unit (5, 6) sets up in 1 bottom of oxygen deficiency pond body, will get into pending sewage in the oxygen deficiency pond and biochemical mud and stir together to promote mixed degree between them, enlarge area of contact, thereby promote sewage treatment efficiency. Compared with the prior art that the filler in the anoxic tank is used as a medium, the problem that the filler is difficult to fully contact and mix due to mud hanging is solved; meanwhile, the problem that denitrification effect is influenced by short flow or dead sludge accumulation is solved, and the safety risk is relatively low.

Wherein, one side of the anoxic tank body 1 is provided with a water inlet pipe 4, and the pipe orifice of the water inlet pipe 4 is positioned at the bottom of the anoxic tank body 1; a water outlet 7 is arranged at the upper part of the anoxic tank body 1; thereby forming a fluid path with a lower inlet and a higher outlet, namely, the sewage to be treated enters the anoxic tank from the bottom of the anoxic tank body 1, and can be discharged after the anoxic tank is filled with enough mud-water mixture and reaches the height of the water outlet. Thereby prolonging the moving path of the sewage, prolonging the contact reaction time of the biochemical sludge and the sewage to be treated and improving the treatment efficiency.

It should be noted that the pool bottom stirring unit is arranged on two sides of the pipe orifice of the water inlet pipe 4; thereby the pending sewage of outflow inlet tube 4 can obtain the stirring rapidly, mixes with biochemical mud, promotes the mixed degree.

Furthermore, the pool bottom stirring units are divided into two rows which are respectively arranged at two sides of the pipe orifice of the water inlet pipe 4 and are arranged in a staggered manner, namely a first row of stirrers 5 is arranged at one side of the pipe orifice of the water inlet pipe 4, and a second row of stirrers 6 is arranged at the other side of the pipe orifice of the water inlet pipe 4; wherein, any mixer in the second row of mixers 6 all is located between two adjacent mixers in the first row of mixers 5 to make the rivers that pass through can form continuous S-shaped removal route, prolong rivers route, thereby make the mixture more abundant, extension mixing time promotes the treatment effect.

In order to prolong the flow path of sewage, the water outlet 7 is arranged at the upper part of the anoxic pond body 1 and is farthest from the pipe orifice of the water inlet pipe 4. Namely, the water flow flowing into the water inlet pipe 4 can flow in the anoxic tank to the farthest path and then is discharged out of the anoxic tank, so that the biochemical sludge and the sewage to be treated have longer contact mixing time, and a better treatment effect is achieved. Under the conditions, the pool bottom stirring unit is arranged at two sides of the connecting line of the pipe orifice of the water inlet pipe 4 and the water outlet 7; thereby making the S-shaped moving path also can be greatly prolonged, thereby further improving the sewage treatment effect.

This embodiment also proposes a structure of ladder delivery port, specifically, delivery port 7 includes: a plurality of outlet nozzles having different heights; namely, a row of water outlet ports with the height increasing according to the step trend are arranged on the basis of the bottom of the anoxic pond body 1.

Wherein, a plurality of expenditure mouth of a river set up on the lateral wall of oxygen deficiency pond body 1, and according to the distance to the mouth of pipe of inlet tube 4, from far away to near, the height of a plurality of expenditure mouth of a river progressively increases.

That is, the farther from the nozzle of the water outlet pipe 4, the lower the height of the water outlet, and the closer to the nozzle of the water outlet pipe, the higher the height of the water outlet, so that the sewage can always have a sufficiently long moving path and reaction time, a fully mixed state can be maintained, and the sewage treatment effect can be improved.

The oxygen deficiency pond body 1 still set up nitrify liquid back flow 2 and biochemical mud back flow 3 with the inlet tube cooperation, the mouth of pipe sets up in oxygen deficiency pond body 1 bottom to can be convenient for backward flow liquid, biochemical mud and sewage inflow back rapid mixing, promoted reaction efficiency.

Example two

On the basis of the first embodiment, a specific scheme is given for the shape of the anoxic pond body 1.

In the first embodiment, the shape of the anoxic tank body is not particularly limited, and the anoxic tank body may have a special structure such as a circle, an ellipse, and a triangle.

Referring to fig. 1, 2 and 3, the present embodiment shows an anoxic pond body based on a conventional rectangular structure, and based on this, shows the arrangement scheme of each structure thereon.

Specifically speaking, oxygen deficiency pond body 1 is the rectangle cell body, includes: a first sidewall ADFG, a second sidewall ABHG, a third sidewall BCEH, and a fourth sidewall DCEF.

The first side wall ADFG and the third side wall BCEH are oppositely arranged, and the second side wall ABHG and the fourth side wall DCEF are oppositely arranged; the second sidewall ABHG is connected between the first sidewall ADFG and the third sidewall BCEH, and the fourth sidewall DCEF is connected between the first sidewall ADFG and the third sidewall BCEH.

A water inlet pipe 4 is arranged at the connecting part of the first side wall ADFG and the second side wall ABHG, and the pipe orifice of the water inlet pipe 4 is positioned at the bottom of the anoxic tank body 1;

the upper part of the third side wall BCEH is provided with a plurality of water outlets 7 with different heights, and the heights of the water outlets 7 are gradually increased from far to near according to the distance from the pipe orifice of the water inlet pipe 4.

The bottom of the pool agitator set includes: a first row of blenders 5 disposed below the first sidewall ADFG and a second row of blenders 6 disposed below the third sidewall BCEH;

the first row of stirrers 5 and the second row of stirrers 6 are arranged in a staggered manner.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. An oxygen-deficient pond for sewage treatment, characterized by comprising: an anoxic tank body and a tank bottom stirring unit; the tank bottom stirring unit is arranged at the bottom of the anoxic tank body;

a water inlet pipe is arranged on one side of the anoxic tank body, and the pipe orifice of the water inlet pipe is positioned at the bottom of the anoxic tank body; a water outlet is formed in the upper part of the anoxic tank body;

the pool bottom stirring unit is arranged on two sides of the pipe orifice of the water inlet pipe;

the water outlet includes: a plurality of outlet nozzles having different heights;

the plurality of water outlet ports are arranged on the side wall of the anoxic pond body, and the heights of the plurality of water outlet ports are gradually increased from far to near according to the distance from the water inlet pipe to the pipe orifice of the water inlet pipe;

the water outlet is arranged on the upper part of the anoxic pond body and is farthest from the pipe orifice of the water inlet pipe.

2. The anoxic tank for sewage treatment as set forth in claim 1, wherein: the pool bottom stirring unit is arranged on two sides of a connecting line between the pipe orifice of the water inlet pipe and the water outlet.

3. The anoxic tank for sewage treatment as set forth in claim 2, wherein: the pool bottom stirring units arranged at the two sides of the connecting line of the pipe orifice of the water inlet pipe and the water outlet are arranged in a staggered manner.

4. The anoxic tank for sewage treatment according to claim 1, wherein the anoxic tank body is a rectangular tank body comprising: a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall;

the first side wall and the third side wall are arranged oppositely, and the second side wall and the fourth side wall are arranged oppositely; the second sidewall is connected between the first sidewall and the third sidewall, and the fourth sidewall is connected between the first sidewall and the third sidewall;

a water inlet pipe is arranged at the connecting part of the first side wall and the second side wall, and the pipe orifice of the water inlet pipe is positioned at the bottom of the anoxic pond body;

a plurality of water outlet ports with different heights are arranged at the upper part of the third side wall, and the heights of the water outlet ports are gradually increased from far to near according to the distance from the water inlet pipe to the pipe orifice of the water inlet pipe;

the bottom of the pool agitator set includes: a first row of stirrers arranged at the lower part of the first side wall and a second row of stirrers arranged at the lower part of the third side wall;