CN111099793A

CN111099793A - Domestic sewage denitrification treatment device

Info

Publication number: CN111099793A
Application number: CN202010040740.3A
Authority: CN
Inventors: 陈俊敏; 聂贤文; 时任辉; 秦骐瑞; 邓捷航
Original assignee: Chengdu Yida Environment Protection Detection Co ltd; Southwest Jiaotong University
Current assignee: Chengdu Yida Environment Protection Detection Co ltd; Southwest Jiaotong University
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-05-05

Abstract

The invention discloses a domestic sewage denitrification treatment device, which comprises an aeration tank and a percolation tank, wherein the aeration tank is communicated with the upper part of the percolation tank through a pipe body, the upper part of the aeration tank is also provided with a water inlet pipe and an air inlet pipe, the free end of the air inlet pipe is provided with a nano aerator, the nano aerator is arranged in the aeration tank, a filter medium is arranged in the percolation tank, the filter medium is divided into three layers, a first filter layer, a second filter layer and a third filter layer are sequentially arranged from top to bottom, and the bottom of the percolation tank is provided with a drain pipe. The device can effectively solve the problems of large occupied area, more required artificial filter materials and poor aerobic treatment effect of the existing treatment system.

Description

Domestic sewage denitrification treatment device

Technical Field

The invention belongs to the technical field of sewage treatment devices, and particularly relates to a domestic sewage denitrification treatment device.

Background

The traditional constructed rapid infiltration system (CRI system for short) is a novel sewage treatment technology with own characteristics developed gradually by taking the advantages of a sewage rapid infiltration land treatment system and an artificial wetland system as a reference on the basis of research and summary of various land treatment and rapid infiltration systems. The technology has the advantages of low construction and operation cost, high pollutant removal rate, zero-yield activated sludge, simple operation and operation mode, short construction period and the like, can effectively solve the problem of low sewage treatment capacity caused by the limitation of capital, technology, talents and other factors in the current rural areas, and is a sewage treatment technology which is very suitable for the rural areas in China. However, the existing rapid infiltration system has large occupied area, more artificial filter materials are needed, and the aerobic treatment efficiency is low.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a domestic sewage denitrification treatment device which can effectively solve the problems of large occupied area, more required artificial filter materials and poor aerobic treatment effect of the conventional treatment system.

In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a domestic sewage denitrification processing apparatus, includes aeration tank and infiltration pond, and the aeration tank passes through the body intercommunication with infiltration pond upper portion, and aeration tank upper portion still is provided with inlet tube and intake pipe, and the free end of intake pipe is provided with nanometer aeration machine, and nanometer aeration machine sets up in the aeration tank bottom, is provided with filter media in the infiltration pond, and filter media divide into the three-layer, and from the top down is first filter layer, second filter layer and third filter layer in proper order, and infiltration pond bottom is provided with the drain pipe.

The beneficial effect that above-mentioned scheme produced does: after sewage enters an aeration tank, micro-nano bubbles are produced into the aeration tank through a nano aerator, the particle size of the micro-nano bubbles is smaller than 3 mu m, the rising speed of the micro-nano bubbles in a water body is slow, the content of the bubbles in the water body is gradually increased in the process that the water body in the aeration tank gradually rises, high pressure is generated instantly after the bubbles are broken, the content of dissolved oxygen and high-concentration oxygen anions in the water body are increased, and the efficient decomposition of various organic waste gases and organic waste water and the breaking of organic matter molecular chain structures are realized; when the water level in the aeration tank rises to the body position, the higher water of dissolved oxygen content flows into the infiltration pond through the body, passes through first filter layer, second filter layer and third filter layer in proper order, can fully carry out ammoniation, nitration and denitrification reaction, realizes the purification of water, improves the ammonia nitrogen clearance. The aeration tank and the infiltration tank are closely adjacent, so that the device has smaller volume.

Furthermore, the first filter layer is a fine sand layer, the second filter layer is a coarse sand layer, and the third filter layer is a gravel layer.

Further, the height of the first filter layer was 30cm, the height of the second filter layer was 50cm, and the height of the third filter layer was 10 cm.

Furthermore, the diameter of the fine sand particles of the fine sand layer is 0.1-0.5mm, the diameter of the coarse sand particles of the coarse sand layer is 0.2-25mm, and the diameter of the gravel layer is 4-40 mm.

The beneficial effect that above-mentioned scheme produced does: the particle size of first filter layer, second filter layer and third filter layer increases gradually, ammoniation and nitration weaken gradually in first filter layer and second filter layer, and denitrification strengthens gradually in second filter layer and the third filter layer, sets up first filter layer to 30cm, can satisfy the high efficiency effect of aerobic segment, sets up the second filter layer to 50cm for the length of anaerobic segment increases, is favorable to further reducing the concentration of anaerobic segment dissolved oxygen, creates the condition for denitrification reaction. The purpose of improving the filtering effect is achieved by controlling the heights and the particle diameters of the first filtering layer, the second filtering layer and the third filtering layer. The particle size of the fine sand layer particles is set to be 0.1-0.5nm, the particle size of the coarse sand layer particles is set to be 0.2-2.5mm, and the particle size of the crushed stone layer is set to be 4-40mm, so that the stable water outlet effect can be still achieved when the hydraulic load and the environment are changed.

Furthermore, the free end of the pipe body is provided with a sprinkler head, and the sprinkler head is arranged on the upper portion of the first filter layer.

The beneficial effect that above-mentioned scheme produced does: the diameter of the sprinkler head is equal to that of the infiltration tank, and the sprinkler head is arranged, so that the water body uniformly falls on the first filter layer, and the filtering effect can be improved.

Further, the distance from the upper surface of the filter medium to the top of the infiltration pond is more than 30 cm.

The beneficial effect that above-mentioned scheme produced does: the water body enters the percolation layer and falls for a certain time, and a certain distance is reserved for caching the water body, so that the water body is prevented from overflowing.

Further, a rotor flow meter is arranged on the pipe body.

The beneficial effect that above-mentioned scheme produced does: the flow speed of the water body can be observed through the rotameter so as to be adjusted in time.

Further, the device also comprises a pre-settling tank, and the pre-settling tank is communicated with the aeration tank through a water inlet pipe.

The beneficial effect that above-mentioned scheme produced does: the pre-settling tank is used for settling water bodies, settling large-particle pollutants in the water bodies, and pre-treating the water bodies to improve the treatment effect of subsequent water bodies.

The beneficial effects produced by the invention are as follows:

1. the nano aerator is arranged in the aeration tank, so that the dissolved oxygen content and high-concentration oxygen anions in the water body can be increased, the high-efficiency decomposition of various organic waste gases and organic waste water and the breaking of organic matter molecular chain structures are realized, and the denitrification effect is further improved.

2. The aeration tank upper portion is through body and infiltration pond intercommunication, and the storage time of multiplicable water in the aeration tank, and then increases the oxygen content in the water through nanometer aeration machine, improves the denitrogenation effect.

3. The denitrification treatment device has the advantages of simple structure, simple and convenient operation and use and less filter medium usage in the filter layer.

Drawings

FIG. 1 is a schematic structural view of the present invention;

reference numerals: 1. an aeration tank; 2. a percolation pool; 3. a pipe body; 4. a water inlet pipe; 5. an air inlet pipe; 6. a nano aerator; 7. a first filter layer; 8. a second filter layer; 9. a third filter layer; 10. a drain pipe; 11. A sprinkler head; 12. a rotameter; 13. a preliminary sedimentation tank.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

In one embodiment of the present invention, as shown in fig. 1, a domestic sewage treatment apparatus is provided, which comprises an aeration tank 1 and a percolating tank 2, wherein the aeration tank 1 is communicated with the upper part of the percolating tank 2 through a pipe 3, optimally, a spray head 11 is arranged at the free end of the pipe 3, and the spray head 11 is arranged on the upper part of a first filter layer 7. Preferably, a rotameter 12 is arranged on the tubular body 3.

The upper portion of the aeration tank 1 is further provided with a water inlet pipe 4 and an air inlet pipe 5, the free end of the air inlet pipe 5 is provided with a nano aerator 6, the nano aerator 6 is arranged at the bottom of the aeration tank 1, a filter medium is arranged in the percolation tank 2, and optimally, the distance from the upper surface of the filter medium to the top of the percolation tank 2 is greater than 30 cm. The filter medium is divided into three layers, namely a first filter layer 7, a second filter layer 8 and a third filter layer 9 from top to bottom in sequence, optimally, the first filter layer 7 is a fine sand layer, the second filter layer 8 is a coarse sand layer, and the third filter layer 9 is a gravel layer. Preferably, the height of the first filter layer 7 is 30cm, the height of the second filter layer 8 is 50cm and the height of the third filter layer 9 is 10 cm. Optimally, the diameter of fine sand particles of the fine sand layer is 0.1-0.5mm, the fine sand layer also contains marble sand with the mass of 5% of the fine sand, the marble sand is uniformly mixed in the fine sand layer, the diameter of coarse sand particles of the coarse sand layer is 0.2-25mm, the fine sand layer also contains marble sand with the mass of 5% of the coarse sand, the marble sand is uniformly mixed in the coarse sand, the diameter of crushed stone layer crushed stone is 4-40mm, the fine sand layer also contains marble sand with the mass of 5% of crushed stone, the marble sand is uniformly mixed and crushed stone, the particle size of the marble sand is 5cm, and the marble sand plays a role in supporting a bone beam.

The bottom of the infiltration tank 2 is provided with a drain pipe 10. Optimally, the device also comprises a pre-settling tank 13, and the pre-settling tank 13 is communicated with the aeration tank 1 through a water inlet pipe 4.

The use process of the device is as follows: sewage in the pre-settling tank 13 is pumped into the aeration tank 1 through a water pump and the like, then the nano aerator 6 is started to aerate the water body, the water body gradually increases in the aeration process, the oxygen content in the water body gradually increases, when the water level reaches the height of the pipe body 3, the water body passes through the pipe body 3 and the sprinkler head 11 and is sprayed on the first filter layer 7, and the water body sequentially passes through the first filter layer 7, the second filter layer 8 and the third filter layer 9, so that the water body flows out through the drain pipe 10 after denitrification is realized.

Claims

1. The utility model provides a domestic sewage denitrification processing apparatus, its characterized in that, includes aeration tank (1) and infiltration pond (2), aeration tank (1) with body (3) intercommunication is passed through on infiltration pond (2) upper portion, aeration tank (1) upper portion still is provided with inlet tube (4) and intake pipe (5), the free end of intake pipe (5) is provided with nanometer aeration machine (6), nanometer aeration machine (6) set up in aeration tank (1), be provided with filter media in infiltration pond (2), filter media divide into the three-layer, from the top down is first filter layer (7), second filter layer (8) and third filter layer (9) in proper order, infiltration pond (2) bottom is provided with drain pipe (10).

2. The denitrification facility for domestic sewage according to claim 1, wherein the first filter layer (7) is a fine sand layer, the second filter layer (8) is a coarse sand layer, and the third filter layer (9) is a gravel layer.

3. The denitrification facility for domestic sewage according to claim 1, wherein the first filter layer (7) has a height of 30cm, the second filter layer (8) has a height of 50cm, and the third filter layer (9) has a height of 10 cm.

4. The denitrification unit for domestic sewage according to claim 2, wherein the fine sand particles of the fine sand layer have a diameter of 0.1-0.5mm, the coarse sand particles of the coarse sand layer have a diameter of 0.2-25mm, and the crushed stones of the gravel layer have a diameter of 4-40 mm.

5. The denitrification treatment apparatus for domestic sewage according to claim 1, wherein the free end of the pipe body (3) is provided with a sprinkler head (11), and the sprinkler head (11) is arranged on the upper part of the first filter layer (7).

6. The denitrification facility for domestic sewage according to claim 1, wherein the distance from the upper surface of the filter medium to the top of the diafiltration chamber (2) is greater than 30 cm.

7. The denitrification facility for domestic sewage according to claim 1, wherein a rotameter (12) is provided on the pipe body (3).

8. The denitrification treatment device for domestic sewage according to claim 1, further comprising a pre-settling tank (13), wherein the pre-settling tank (13) is communicated with the aeration tank (1) through the water inlet pipe (4).