CN112358051A - Integrated sewage circulating reflux deoxidation treatment device - Google Patents
Integrated sewage circulating reflux deoxidation treatment device Download PDFInfo
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- CN112358051A CN112358051A CN202011370132.5A CN202011370132A CN112358051A CN 112358051 A CN112358051 A CN 112358051A CN 202011370132 A CN202011370132 A CN 202011370132A CN 112358051 A CN112358051 A CN 112358051A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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Abstract
The invention provides an integrated sewage circulating reflux deoxidation treatment device which comprises a box body, an anoxic tank, an aerobic tank, an MBR (membrane bioreactor) membrane tank, a deoxidation tank, an air stripping reflux device and a deoxidation stirrer, wherein the anoxic tank is arranged in the box body; the anoxic tank, the aerobic tank, the MBR membrane tank and the deoxidation tank are sequentially communicated and arranged in a box body, and the nitrified sewage flows back through the deoxidation tank firstly, so that air in the sewage overflows under the action of a deoxidation stirrer, and the concentration of dissolved oxygen in the sewage is reduced to meet the concentration of dissolved oxygen required by denitrification in the anoxic tank; the whole device is in a complete circulating and communicating state by combining the gas stripping reflux device, so that sufficient nitrification liquid reflux and sludge reflux are ensured, the sludge concentration is higher, and the removal efficiency of each pollutant is greatly improved; the power source of the air stripping reflux device is air, a nitrifying liquid reflux pump and a sludge reflux pump do not need to be installed, the air stripping reflux device is low in manufacturing cost, convenient to install and not prone to damage, maintenance frequency is greatly reduced, and the air stripping reflux device has good practicability.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an integrated sewage circulating reflux deoxidation treatment device.
Background
In a sewage treatment system of a sewage treatment plant in an industrial park, the commonly adopted biological denitrification treatment process is an A/O (anaerobic/oxic) and MBR (membrane bioreactor) tank. In order to ensure the treatment effect of the system, a nitrifying liquid reflux pump and a sludge reflux pump are commonly adopted to provide reflux power at present. The nitrifying liquid reflux is that nitrate nitrogen generated after aerobic nitrification treatment directly flows back to the anoxic tank and is mixed with raw water, total nitrogen in the sewage is removed through denitrification of the anoxic tank, and the reflux ratio of the nitrifying liquid is between 100 and 400 percent; the sludge backflow is that the sludge subjected to mud-water separation flows back to the front end to ensure the sludge concentration of a biochemical system, and the sludge backflow ratio is generally 100%.
However, the return flow of the nitrifying liquid and the sludge is large, each part needs to be arranged dispersedly, a large space is occupied, and the nitrifying liquid and the sludge must be returned by adopting a nitrifying liquid return pump and a sludge return pump, so that the operation energy consumption of the whole system is high, and the nitrifying liquid return pump and the sludge return pump have the defects of high purchase cost, complex installation, easy damage, frequent maintenance and the like; in the reflux process, organic nitrogen in the sewage is oxidized into ammonia nitrogen while the organic matters are oxidized under the condition that the aerobic tank provides sufficient dissolved oxygen, and the organic nitrogen is further oxidized into nitrite and nitrate under the condition that the dissolved oxygen is sufficient and the sludge age is long, so that the concentration of the dissolved oxygen in the sewage containing nitrate nitrogen is high, and the denitrification effect of the anoxic tank is influenced if the sewage directly enters the anoxic tank from the aerobic tank.
Disclosure of Invention
In view of the above, there is a need to provide an integrated sewage recycling and deoxidizing treatment apparatus, which can save the arrangement space and reduce the energy loss of nitrifying liquid reflux and sludge reflux, and can reduce the oxygen content in the reflux liquid.
The invention provides an integrated sewage circulating reflux deoxidation treatment device, which comprises:
the water inlet and the water outlet are formed in the box body, and a middle partition plate, a first partition wall and a second partition wall are formed in the box body; the middle partition plate divides the box body into a first chamber and a second chamber; the first cavity is divided by the first partition wall, and a first circulation hole is formed in the first partition wall; the second partition wall partitions the second cavity, and a second circulation hole is formed in the second partition wall; the middle partition plate is provided with a third circulating hole and a fourth circulating hole;
the anoxic tank is arranged on one side of the first partition wall, and the water inlet is communicated with the anoxic tank;
the aerobic tank is arranged on the other side of the first partition wall and is communicated with the anoxic tank through a first circulation hole;
the MBR membrane tank is arranged on one side of the second partition wall, the water outlet is communicated with the MBR membrane tank, and the MBR membrane tank is communicated with the aerobic tank through a third circulation hole;
the deoxidation tank is arranged on the other side of the second partition wall and is communicated with the MBR membrane tank through a second circulation hole; the deoxidation tank is communicated with the anoxic tank through a fourth circulation hole;
a reflux pipeline of the gas stripping reflux device penetrates through the middle partition plate, a sludge outlet of the gas stripping reflux device is communicated with the anoxic tank, and a sludge inlet of the gas stripping reflux device is communicated with the deoxidation tank;
and the deoxidation stirrer is arranged in the deoxidation tank.
Optionally, the integrated sewage circulating reflux deoxidation treatment device further comprises a mixing stirrer, and the mixing stirrer is installed in the anoxic tank.
Optionally, the integrated sewage circulating reflux deoxidation treatment device further comprises a plurality of microporous aeration pipes, and the microporous aeration pipes are all installed in the aerobic tank.
Optionally, the plurality of microporous aeration pipes are evenly divided into at least three groups, and the at least three groups of microporous aeration pipes are sequentially arranged in the aerobic tank at equal intervals from top to bottom.
Optionally, the distance from the first circulation hole to the middle partition plate is greater than the distance from each microporous aeration pipe to the middle partition plate.
Optionally, a plurality of MBR membrane modules are arranged in the MBR membrane pool, and the plurality of MBR membrane modules are sequentially arranged at intervals.
Optionally, each of the MBR membrane modules is a flat membrane module.
The invention has the beneficial effects that:
according to the integrated sewage circulating reflux deoxidation treatment device, the anoxic tank, the aerobic tank, the MBR membrane tank and the deoxidation tank are sequentially communicated and arranged in one box body, so that the arrangement space is saved; the sewage after nitrification treatment flows back to the deoxidation tank, and the air in the sewage overflows under the action of the deoxidation stirrer arranged in the deoxidation tank, so that the dissolved oxygen concentration in the sewage is reduced, the dissolved oxygen concentration required by denitrification in the anoxic tank is met, and the denitrification and denitrification effects in the anoxic tank are greatly improved; the whole device is in a complete circulating and communicating state by combining the gas stripping reflux device, so that sufficient nitrification liquid reflux and sludge reflux are ensured, the sludge concentration is higher, and the removal efficiency of each pollutant is greatly improved; the power source of the air stripping reflux device is air, a nitrifying liquid reflux pump and a sludge reflux pump do not need to be installed, the air stripping reflux device is low in manufacturing cost, convenient to install and not prone to damage, maintenance frequency is greatly reduced, and the air stripping reflux device has good practicability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a top view of the integrated wastewater recycling deoxidation treatment apparatus of the present invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.
Example one
Referring to fig. 1, the integrated sewage recycling and refluxing deoxidation treatment device disclosed in this embodiment includes a box 1, an anoxic tank 2, an aerobic tank 3, an MBR membrane tank 4, a deoxidation tank 5, a gas stripping reflux unit 6, and a deoxidation agitator 7. Wherein, be provided with median septum, first partition wall and second partition wall in the box 1 to divide into four parts with the space of box 1 inside, be used for corresponding depositing foretell oxygen deficiency pond 2, good oxygen pond 3, MBR membrane cisterna 4, deoxidation tank 5 respectively. And the box body 1 is provided with a water inlet and a water outlet, the water inlet is communicated with the anoxic tank 2, and the water outlet is communicated with the MBR membrane tank 4.
Specifically, the middle partition plate is vertically fixed in the case 1, and the middle partition plate divides the case 1 into a first chamber and a second chamber. The first partition wall horizontally connects the middle partition plate and the side plate of the box body 1, so that the first chamber is divided into two spaces, and the two spaces are used for storing the anoxic tank 2 and the aerobic tank 3 respectively. It is easily understood that the anoxic tank 2 and the aerobic tank 3 both refer to the packing containing the corresponding microorganisms. A first circulation hole is formed in the first partition wall, and the first circulation hole enables water bodies of the anoxic tank 2 and the aerobic tank 3 to be communicated with each other. The second partition plate of this embodiment horizontally connects the middle partition plate and the side plate of the box body 1, thereby dividing the second chamber into two other spaces, and the two other spaces respectively store the MBR membrane tank 4 and the deoxygenating tank 5. It is also easily understood that the MBR membrane tank 4 and the deoxygenation tank 5 are also referred to as packing containing the corresponding microorganisms. And a second circulating hole is formed in the second partition wall, and the water bodies of the MBR membrane tank 4 and the deoxidation tank 5 are communicated with each other through the second circulating hole. MBR membrane cisterna 4 is located the one side of good oxygen pond 3, and deoxidation pond 5 then is located the one side of oxygen deficiency pond 2, through set up third circulation hole and fourth circulation hole on the median septum, the third circulation hole will be good oxygen pond 3 and MBR membrane cisterna 4 intercommunication, and the fourth circulation hole will deoxidize 5 ponds and oxygen deficiency pond 2 and be linked together.
It is to be noted that the deoxidation agitator 7 of this embodiment is installed in the deoxidation tank 5. The deoxidation agitator 7 is used to agitate the sewage in the deoxidation tank 5. It is easy to understand that, under the condition that the aerobic tank 3 provides sufficient dissolved oxygen, organic nitrogen in the sewage is oxidized into ammonia nitrogen while organic matters are oxidized, and under the condition that the dissolved oxygen is sufficient and the sludge age is long, the organic nitrogen is further oxidized into nitrite and nitrate, at the moment, the concentration of the dissolved oxygen in the sewage containing nitrate nitrogen is high, and if the sewage directly enters the anoxic tank 2, the denitrification effect of the anoxic tank 2 is affected. Therefore, sewage subjected to nitrification treatment needs to pass through the deoxidation tank 5, and the air in the sewage is stirred by the deoxidation stirrer 7 arranged in the deoxidation tank 5 to overflow, so that the dissolved oxygen concentration in the sewage is reduced, the dissolved oxygen concentration required by denitrification in the anoxic tank 2 is met, the reflux of nitrified liquid is ensured, and the denitrification and denitrification effects are greatly improved.
The reflux pipeline of the gas stripping reflux device 6 in the embodiment penetrates through the middle partition plate, the sludge outlet of the gas stripping reflux device 6 is communicated with the anoxic tank 2, and the sludge inlet of the gas stripping reflux device 6 is communicated with the deoxidation tank 5. The gas stripping reflux device 6 is used for lifting the sludge in the deoxidation tank 5 to the anoxic tank 2, thereby ensuring the sludge concentration of the whole integrated sewage circulating reflux deoxidation treatment device. The power source of the air stripping reflux device 6 is air, and a nitrifying liquid reflux pump and a sludge reflux pump do not need to be installed, so that the manufacturing cost and the energy loss of the whole device are reduced, the installation is convenient, the damage is not easy to damage, and the maintenance frequency is greatly reduced.
Further, the integrated sewage circulating reflux deoxidation treatment device of the embodiment further comprises a mixing stirrer 8, and the mixing stirrer 8 is installed in the anoxic tank 2. The mixing stirrer 8 is used for uniformly stirring the returned nitrification liquid, returned sludge and raw water in the anoxic tank 2, so that the nitrification effect is not ideal due to the fact that the returned nitrification liquid and returned sludge are deposited in the anoxic tank 2.
Furthermore, the integrated sewage recycling and deoxidizing device of this embodiment further includes a plurality of microporous aeration pipes 9, and the microporous aeration pipes 9 are all installed in the aerobic tank 3. Specifically, the microporous aeration pipes 9 of the present embodiment are equally divided into five groups, each group has ten microporous aeration pipes 9, the five groups of microporous aeration pipes 9 are sequentially arranged in the aerobic tank 3 at equal intervals from top to bottom, and the microporous aeration pipes 9 in the group are also sequentially arranged in the horizontal direction. It is noted that the distance from the first circulation hole to the middle partition is greater than the distance from each micro-porous aeration tube 9 to the middle partition. That is, the sewage flowing from the first circulation hole to the aerobic tank 3 is impacted by the gas exposed from the microporous aeration pipe 9 to increase the oxygen content in the sewage.
Furthermore, in the MBR membrane tank 4 of the present embodiment, a plurality of MBR membrane modules 10 are disposed, and the plurality of MBR membrane modules 10 are sequentially disposed at intervals. Each of the MBR membrane modules 10 is a flat membrane module. Suspended solid in the sewage can be filtered in sequence by the flat membrane component, solid-liquid separation is carried out efficiently, the separation effect is far better than that of the traditional sedimentation tank, the effluent quality is good, and the effluent suspended solid and turbidity are close to zero.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention.
Claims (7)
1. The utility model provides an integration sewage circulation backward flow deoxidation treatment device which characterized in that includes:
the water inlet and the water outlet are formed in the box body, and a middle partition plate, a first partition wall and a second partition wall are formed in the box body; the middle partition plate divides the box body into a first chamber and a second chamber; the first partition wall divides the first cavity, and a first circulation hole is formed in the first partition wall; the second partition wall partitions the second cavity, and a second circulation hole is formed in the second partition wall; the middle partition plate is provided with a third circulation hole and a fourth circulation hole;
the anoxic tank is arranged on one side of the first partition wall, and the water inlet is communicated with the anoxic tank;
the aerobic tank is arranged on the other side of the first partition wall and communicated with the anoxic tank through the first circulation hole;
the MBR membrane tank is arranged on one side of the second partition wall, the water outlet is communicated with the MBR membrane tank, and the MBR membrane tank is communicated with the aerobic tank through the third circulation hole;
the deoxidation tank is arranged on the other side of the second partition wall and communicated with the MBR membrane tank through the second circulation hole; the deoxidation tank is communicated with the anoxic tank through the fourth circulation hole;
a reflux pipeline of the gas stripping reflux device penetrates through the middle partition plate, a sludge outlet of the gas stripping reflux device is communicated with the anoxic tank, and a sludge inlet of the gas stripping reflux device is communicated with the deoxidation tank;
and the deoxidation stirrer is arranged in the deoxidation pool.
2. The integrated sewage recirculating and deoxygenating treatment device of claim 1, further comprising a mixing agitator installed in the anoxic tank.
3. The integrated sewage circulating and refluxing deoxidation treatment device according to claim 1, further comprising a plurality of microporous aeration pipes, wherein the microporous aeration pipes are all installed in the aerobic tank.
4. The integrated sewage circulating reflux deoxygenation treatment device of claim 3, wherein the plurality of microporous aeration pipes are divided into at least three groups, and at least three groups of microporous aeration pipes are sequentially arranged in the aerobic tank at equal intervals from top to bottom.
5. The integrated sewage recirculating and deoxygenating apparatus of claim 3, wherein the distance from the first recirculating hole to the middle partition is greater than the distance from each of the microporous aeration pipes to the middle partition.
6. The integrated sewage circulating and refluxing deoxidation treatment device as claimed in any one of claims 1 to 5, wherein a plurality of MBR membrane modules are arranged in the MBR membrane tank, and the plurality of MBR membrane modules are sequentially arranged at intervals.
7. The integrated sewage recycling and deoxygenation device of claim 6, wherein each MBR membrane module is a flat membrane module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370132.5A CN112358051A (en) | 2020-11-30 | 2020-11-30 | Integrated sewage circulating reflux deoxidation treatment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011370132.5A CN112358051A (en) | 2020-11-30 | 2020-11-30 | Integrated sewage circulating reflux deoxidation treatment device |
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| CN112358051A true CN112358051A (en) | 2021-02-12 |
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| CN202011370132.5A Pending CN112358051A (en) | 2020-11-30 | 2020-11-30 | Integrated sewage circulating reflux deoxidation treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353205A (en) * | 2022-10-21 | 2022-11-18 | 北京博汇特环保科技股份有限公司 | Biochemical reaction system and sewage treatment method |
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2020
- 2020-11-30 CN CN202011370132.5A patent/CN112358051A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353205A (en) * | 2022-10-21 | 2022-11-18 | 北京博汇特环保科技股份有限公司 | Biochemical reaction system and sewage treatment method |
| CN115353205B (en) * | 2022-10-21 | 2023-02-17 | 北京博汇特环保科技股份有限公司 | Biochemical reaction system and sewage treatment method |
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