CN217868329U

CN217868329U - Inside and outside stack combination AO sewage denitrification device

Info

Publication number: CN217868329U
Application number: CN202222319920.2U
Authority: CN
Inventors: 章毅
Original assignee: Suzhou Danlin Environmental Technology Co ltd
Current assignee: Suzhou Danlin Environmental Technology Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-11-22
Anticipated expiration: 2032-09-01

Abstract

The utility model relates to an inside and outside superposition combined AO sewage denitrification device, which belongs to the field of environmental protection equipment and solves the problems of large occupied area and unsuitability for denitrification treatment of industrial and mining enterprise sewage with nervous land; the anaerobic reactor also comprises a wastewater diversion assembly, the wastewater diversion assembly comprises a water inlet pipe, a first water outlet weir channel, a second water outlet weir channel and a drain pipe arranged at the bottom of the second water outlet weir channel, the lower part of the anoxic tank body is provided with a gas stripping return pipe used for conveying sewage in the aerobic reaction cavity into the anoxic tank body, and the gas stripping return pipe is positioned below the second water outlet weir channel; has the effects of compact structure, simple operation and extremely low energy consumption, and can finish denitrification under the condition of small occupied area.

Description

Inside and outside stack combination AO sewage denitrification device

Technical Field

The utility model belongs to the environmental protection equipment field relates to an inside and outside stack combination AO sewage denitrification device.

Background

The treatment process for degrading organic matters by wastewater is various, and the prior industry uses a plurality of denitrification processes such as A/O, A/A/O and the like, namely, the denitrification processes are completed by ammoniation, nitrification and denitrification and then connected with a sedimentation tank;

the existing patent publication No. CN210393892U kilometers opens a multi-stage AO denitrification device which consists of a plurality of stages of anaerobic/aerobic sections and a sedimentation tank, wherein each stage of anaerobic/aerobic section is formed by connecting an anoxic tank and an aerobic tank, adjacent anaerobic/aerobic sections are connected in series, the water outlet of a water inlet pipe is respectively connected with the water inlet of each stage of anoxic tank, a stirrer is arranged in each stage of anoxic tank, each stage of anoxic tank and aerobic tank is respectively provided with a pneumatic butterfly valve, the lower part of the aerobic tank is provided with an aeration pipe, the water outlet of the aerobic tank of the last stage of anaerobic/aerobic section is connected with the water inlet pipe of the sedimentation tank through a biochemical tank water outlet pipe and a pipeline, the water inlet pipe of the sedimentation tank is connected with the water inlet at the bottom of the sedimentation tank through a pipeline, the water outlets at two sides of the upper part of the sedimentation tank are connected with a supernatant water outlet pipe of the sedimentation tank, and the sludge discharge outlet at the bottom is connected with a sludge pipe. The process conditions can be independently and optimally controlled at each stage through multi-stage AO denitrification, and the whole system ensures that the nitrification and denitrification reaction conditions are more stable, so that the efficient operation of nitrification and denitrification is ensured, and the denitrification efficiency of the whole system can reach more than 95 percent.

However, the above description has a problem that when the sewage is subjected to denitrification treatment, since the sewage is composed of a plurality of anaerobic/aerobic stages and a sedimentation tank connected in series, the occupied area is large, and the sewage is not suitable for denitrification treatment of sewage of industrial and mining enterprises with tight land occupation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an inside and outside stack combination AO sewage denitrification device has solved area big, unsuitable problem that is used for the denitrogenation of land shortage's industrial and mining enterprise sewage to handle.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides an inside and outside superposition combined AO sewage denitrification device, including an outer ring tank body and an anoxic tank body arranged in the outer ring tank body, wherein the outer diameter of the anoxic tank body is smaller than the inner diameter of the outer ring tank body, an aerobic reaction chamber is formed between the outer ring tank body and the anoxic tank body, the inner bottom end of the aerobic reaction chamber is provided with a gas distribution system along the circumferential direction, a partition plate is arranged in the aerobic reaction chamber, and the partition plate is arranged at the same height as the outer ring tank body and the anoxic tank body;

the anaerobic tank is characterized by further comprising a wastewater diversion assembly, wherein the wastewater diversion assembly comprises a water inlet pipe, a first water outlet weir channel, a second water outlet weir channel and a water drain pipe arranged at the bottom of the second water outlet weir channel, the water inlet pipe is arranged in the anaerobic tank body, the water outlet end of the water inlet pipe extends to the lower part of the anaerobic tank body, the first water outlet weir channel is arranged at the top of the anaerobic tank body and is positioned on one side of the partition plate, and the second water outlet weir channel is arranged at the upper end of the other side surface of the partition plate;

and a gas stripping return pipe for conveying the sewage in the aerobic reaction cavity into the anoxic tank body is arranged at the lower part of the anoxic tank body, and the gas stripping return pipe is positioned below the second water outlet weir channel.

Furthermore, a water distributor is arranged at the water outlet end of the water inlet pipe.

Further, the water outlet end of the gas stripping return pipe extends to the water outlet end of the water inlet pipe.

Further, the outer ring tank body and the oxygen-deficient tank body are both made of 304 stainless steel or carbon steel coated with coal tar pitch epoxy.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model discloses an inside and outside stack combination AO sewage denitrification device, through the outer lane jar body, the stack of the oxygen deficiency jar body forms an aerobic reaction chamber, when handling sewage, it overflows into the aerobic reaction intracavity to enter into the internal sewage of oxygen deficiency jar, take place nitration formation nitrate nitrogen in the aerobic reaction intracavity afterwards, the sewage that contains a large amount of nitrate nitrogen passes through the air stripping back flow and flows into the internal denitrification that takes place of oxygen deficiency jar once more and turn into nitrate nitrogen and discharge, thereby accomplish the purpose of denitrogenation, this device compact structure, denitrogenation is accomplished under the area's of the minimum as far as possible condition to this device, the volume load is high, the operation is simple, the energy consumption is extremely low, especially adapted contains the denitrogenation processing of the nervous industrial and mining enterprise of high ammonia nitrogen waste water land used simultaneously.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a top view of the overall structure of the preferred embodiment of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken at A-A of FIG. 1;

fig. 3 is a cross-sectional view at B-B in fig. 1.

Wherein the reference numerals are as follows:

1. an outer ring tank body; 2. an anoxic tank body; 3. an aerobic reaction chamber; 4. a gas distribution system; 5. a partition plate; 6. a wastewater diversion assembly; 61. a water inlet pipe; 62. a first effluent weir channel; 63. a second effluent weir channel; 64. a drain pipe; 7. a gas stripping return pipe; 8. a water distributor.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, fig. 2 and fig. 3, for the utility model provides an inside and outside superposition combined AO sewage denitrification device, an outer ring tank body 1 and an anoxic tank body 2 arranged in the outer ring tank body 1, the outer diameter of the anoxic tank body 2 is smaller than the inner diameter of the outer ring tank body 1, an aerobic reaction chamber 3 is formed between the outer ring tank body 1 and the anoxic tank body 2, the inner bottom end of the aerobic reaction chamber 3 is provided with a gas distribution system 4 along the circumferential direction thereof, a partition plate 5 is arranged in the aerobic reaction chamber 3, and the partition plate 5 is arranged at equal height with the outer ring tank body 1 and the anoxic tank body 2; wherein, the anoxic tank body 2 and the aerobic reaction cavity 3 are both inoculated with sludge for degrading organic matters in the sewage, the sludge in the anoxic tank body 2 is attached with anaerobic denitrifying bacteria, and the sludge in the aerobic reaction cavity 3 is attached with aerobic nitrifying bacteria; the gas distribution system 4 at the bottom of the aerobic reaction cavity 3 supplies oxygen required by the microbial reaction to the aerobic reaction cavity 3, fully mixes the sewage and the sludge, and provides certain power for the flowing of the sewage;

the anaerobic tank further comprises a wastewater diversion assembly 6, the wastewater diversion assembly 6 comprises a water inlet pipe 61, a first water outlet weir channel 62, a second water outlet weir channel 63 and a water outlet pipe 64 arranged at the bottom of the second water outlet weir channel 63, the water inlet pipe 61 is arranged in the anoxic tank body 2, the water outlet end of the water inlet pipe extends to the lower part of the anoxic tank body 2, the first water outlet weir channel 62 is arranged at the top of the anoxic tank body 2 and is positioned at one side of the partition plate 5, and the second water outlet weir channel 63 is arranged at the upper end of the other side surface of the partition plate 5;

the lower part of the anoxic tank body 2 is provided with a gas stripping return pipe 7 for conveying sewage in the aerobic reaction cavity 3 into the anoxic tank body 2, the gas stripping return pipe 7 is positioned below the second water outlet weir channel 63, and the water outlet end of the gas stripping return pipe 7 extends to the water outlet end of the water inlet pipe 61.

Referring to fig. 1, 2 and 3, in operation, high ammonia nitrogen-containing sewage enters an anoxic tank body 2 from top to bottom through a water inlet pipe, dissolved oxygen is kept in the anoxic tank body 2 at 0.2 to 0.5mg/L, when the water amount in the anoxic tank body 2 reaches a certain amount, the high ammonia nitrogen-containing sewage overflows to an aerobic reaction chamber 3 from the top of a first water outlet weir channel 62, ammonia nitrogen in the sewage is nitrified into nitrate nitrogen by aerobic nitrifying bacteria under the condition that the aerobic reaction chamber 3 is oxygenated, then a large amount of nitrate nitrogen flows back to the anoxic tank body 2 through a gas stripping return pipe 7 again, under the condition that the anoxic tank body 2 is anoxic, the nitrate nitrogen is reduced into pollution-free nitrogen through the action of anaerobic denitrifying bacteria and escapes into the external atmosphere, so that the purpose of denitrification is achieved, and then the sewage after denitrification overflows to the aerobic reaction chamber 3 through the first water outlet weir channel 62 again and flows into a second water outlet weir channel 63, and is discharged through a drain pipe connected with the second water outlet weir channel 63;

further, referring to fig. 1, fig. 2 and fig. 3, the water outlet end of the water inlet pipe 61 is provided with a water distributor 8, and water is uniformly distributed by the water distributor 8, so that wastewater to be treated uniformly and stably enters the treatment system, and the influence of large inlet water fluctuation on the microbial treatment effect is prevented.

Further, referring to fig. 1, 2 and 3, the outer ring tank 1 and the anoxic tank 2 are both made of 304 stainless steel or carbon steel coated with coal tar pitch epoxy, and the material has corrosion resistance, so that the service lives of the outer ring tank and the anoxic tank can be prolonged.

In summary, the following steps: an aerobic reaction chamber 3 is formed by overlapping an outer ring tank body 1 and an anoxic tank body 2, when sewage is treated, the sewage entering the anoxic tank body 2 overflows into the aerobic reaction chamber 3, then nitrification reaction is carried out in the aerobic reaction chamber 3 to generate nitrate nitrogen, then the sewage containing a large amount of nitrate nitrogen flows into the anoxic tank body 2 again through a gas stripping return pipe 7 to generate denitrification reaction to convert the nitrate nitrogen into nitrogen and discharge the nitrogen, thereby the aim of denitrification is fulfilled.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An internal and external overlapping combined AO sewage denitrification device is characterized by comprising an outer ring tank body (1) and an anoxic tank body (2) arranged in the outer ring tank body (1), wherein the outer diameter of the anoxic tank body (2) is smaller than the inner diameter of the outer ring tank body (1), an aerobic reaction chamber (3) is formed between the outer ring tank body (1) and the anoxic tank body (2), a gas distribution system (4) is arranged at the inner bottom end of the aerobic reaction chamber (3) along the circumferential direction of the aerobic reaction chamber, a partition plate (5) is arranged in the aerobic reaction chamber (3), and the partition plate (5) is arranged at the same height as the outer ring tank body (1) and the anoxic tank body (2);

the anaerobic tank further comprises a wastewater diversion assembly (6), the wastewater diversion assembly (6) comprises a water inlet pipe (61), a first water outlet weir channel (62), a second water outlet weir channel (63) and a water outlet pipe (64) arranged at the bottom of the second water outlet weir channel (63), the water inlet pipe (61) is arranged in the anaerobic tank body (2) and the water outlet end of the water inlet pipe extends to the lower part of the anaerobic tank body (2), the first water outlet weir channel (62) is arranged at the top of the anaerobic tank body (2) and is positioned on one side of the partition plate (5), and the second water outlet weir channel (63) is arranged at the upper end of the other side surface of the partition plate (5);

the lower part of the anoxic tank body (2) is provided with a gas stripping return pipe (7) for conveying the sewage in the aerobic reaction cavity (3) to the anoxic tank body (2), and the gas stripping return pipe (7) is positioned below the second water outlet weir channel (63).

2. The inside and outside superimposed and combined AO sewage denitrogenation apparatus of claim 1, wherein the water outlet end of the water inlet pipe (61) is provided with a water distributor (8).

3. The inside-outside superimposed AO sewage denitrogenation apparatus according to claim 1 or 2, characterized in that the water outlet end of the gas stripping return pipe (7) extends to the water outlet end of the water inlet pipe (61).

4. The inside and outside superimposed and combined AO sewage denitrogenation apparatus of claim 3, wherein the outer ring tank (1) and the anoxic tank (2) are both made of 304 stainless steel or carbon steel coated with coal tar pitch epoxy.