CN220723878U

CN220723878U - Short-cut nitration reactor

Info

Publication number: CN220723878U
Application number: CN202322352223.1U
Authority: CN
Inventors: 申朝阳; 陈梦雪; 黄勇; 陈道康
Original assignee: Nanjing Gaoke Environmental Technology Co ltd
Current assignee: Nanjing Gaoke Environmental Technology Co ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-04-05
Anticipated expiration: 2033-08-31

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a short-cut nitrification reactor; the anaerobic treatment device comprises a feeding box, an anoxic tank, an aerobic tank, a secondary sedimentation tank and a hydrocyclone, wherein the anoxic tank is communicated with the feeding box, the aerobic tank is respectively communicated with the anoxic tank and the secondary sedimentation tank, the secondary sedimentation tank is respectively communicated with the anoxic tank and the hydrocyclone, the hydrocyclone is communicated with the anoxic tank, the hydrocyclone is provided with a sludge discharge port and an overflow port, activated sludge with larger mass can be recovered by adding the hydrocyclone after the secondary sedimentation tank, and activated sludge with relatively smaller mass flows out upwards along a middle overflow pipeline, so that the sludge loss caused by the expansion of filamentous fungi is reduced, and the biochemical performance is improved.

Description

Short-cut nitration reactor

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to a short-cut nitrification reactor.

Background

Short-cut nitrification, also called nitrosation, is the first step of the nitrification process, and in the nitrification stage, ammonia nitrogen is only oxidized into nitrite nitrogen, so that the nitrite nitrogen is accumulated, and then the denitrification effect can be achieved by processes such as denitrification or anaerobic ammoxidation. The dissolved oxygen concentration is usually controlled to be 0.3-1.0 mg/L in the short-cut nitrification stage, and the activity of nitrite oxidizing bacteria can be inhibited under the lower dissolved oxygen concentration, so that ammonia oxidizing bacteria become a dominant population in nitrifying bacteria group, thereby achieving the accumulation of nitrite nitrogen, and the low DO running condition reduces the aeration energy consumption of a biological denitrification system by 50-60%.

When the sewage treatment device is operated under the condition of low DO for a long time, filamentous bacteria are expanded, so that floccules are loosened, the sedimentation performance of sludge is deteriorated, a large amount of sludge is lost, and the biochemical treatment effect is affected.

Disclosure of Invention

The utility model aims to provide a short-cut nitrification reactor, which solves the problems that the sedimentation performance of sludge is deteriorated, a large amount of sludge is lost, and the biochemical treatment effect is affected.

In order to achieve the aim, the short-cut nitrification reactor comprises a feeding box, an anoxic tank, an aerobic tank, a secondary sedimentation tank and a hydrocyclone, wherein the anoxic tank is communicated with the feeding box, the aerobic tank is respectively communicated with the anoxic tank and the secondary sedimentation tank, the secondary sedimentation tank is respectively communicated with the anoxic tank and the hydrocyclone, the hydrocyclone is communicated with the anoxic tank, and the hydrocyclone is provided with a mud discharge port and an overflow port.

The short-cut nitrification reactor further comprises a lifting pump, and the lifting pump is arranged between the feeding box and the anoxic tank.

Wherein, short-cut nitration reactor still includes the oxygen deficiency agitator, the inside in oxygen deficiency pond is provided with the oxygen deficiency agitator.

The short-cut nitrification reactor further comprises an air compressor, an aeration disc, a submersible stirrer, a dissolved oxygen monitor, a pH monitor, an internal reflux pump and a PLC control cabinet, wherein the aeration disc, the dissolved oxygen monitor and the pH monitor are respectively arranged in the aerobic tank, the air compressor is connected with the aeration disc, the submersible stirrer is connected with the anoxic tank, the internal reflux pump is arranged between the anoxic tank and the aerobic tank, and the air compressor, the dissolved oxygen monitor and the pH monitor are respectively connected with the PLC control cabinet.

The short-cut nitrification reactor further comprises a sludge reflux pump, and the sludge reflux pump is arranged between the secondary sedimentation tank and the anoxic tank.

The short-cut nitrification reactor further comprises an electric ball valve and a sludge recovery pump, the sludge recovery pump is arranged between the hydrocyclone and the anoxic tank, and the electric ball valve is arranged on the hydrocyclone.

According to the shortcut nitrification reactor disclosed by the utility model, sewage enters the anoxic tank from the feeding box, the sewage after anoxic treatment overflows into the aerobic tank, the effluent of the aerobic tank enters the secondary sedimentation tank, sludge flows back to the anoxic tank, the effluent of the secondary sedimentation tank flows into the hydrocyclone, the activated sludge with larger specific gravity is discharged from the sludge discharge port, the treated sewage is discharged from the overflow port, and the hydrocyclone is added after the secondary sedimentation tank, so that the activated sludge with larger mass can be recovered, and the activated sludge with smaller mass flows upwards along the middle overflow pipeline, thereby reducing the sludge loss caused by filamentous bacteria expansion and improving the biochemical performance.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the short-cut nitration reactor according to the utility model.

1-feeding box, 2-anoxic tank, 3-aerobic tank, 4-secondary sedimentation tank, 5-hydrocyclone, 6-PLC control cabinet, 11-lift pump, 21-anoxic stirrer, 31-air compressor, 32-aeration disc, 33-submerged stirrer, 34-dissolved oxygen monitor, 35-pH monitor, 36-internal reflux pump, 41-sludge reflux pump, 51-sludge discharge port, 52-overflow port, 53-electric ball valve and 54-sludge recovery pump.

Detailed Description

Referring to fig. 1, fig. 1 is a schematic structural diagram of a short-cut nitrification reactor.

The utility model provides a short-cut nitrification reactor: the anaerobic treatment device comprises a feeding box 1, an anoxic tank 2, an aerobic tank 3, a secondary sedimentation tank 4 and a hydrocyclone 5, wherein the anoxic tank 2 is communicated with the feeding box 1, the aerobic tank 3 is respectively communicated with the anoxic tank 2 and the secondary sedimentation tank 4, the secondary sedimentation tank 4 is respectively communicated with the anoxic tank 2 and the hydrocyclone 5, the hydrocyclone 5 is communicated with the anoxic tank 2, and the hydrocyclone 5 is provided with a mud discharge port 51 and an overflow port 52.

In this embodiment, sewage enters the anoxic tank 2 from the feed tank 1, the sewage after anoxic treatment overflows into the aerobic tank 3, the effluent of the aerobic tank 3 enters the secondary sedimentation tank 4, sludge flows back to the anoxic tank 2, the effluent of the secondary sedimentation tank 4 flows into the hydrocyclone 5, activated sludge with larger specific gravity is discharged from the sludge discharge port 51, treated sewage is discharged from the overflow port 52, and after the secondary sedimentation tank 4, the hydrocyclone 5 is added, so that activated sludge with larger mass can be recovered, and activated sludge with smaller mass flows upwards along the middle overflow pipeline, thereby reducing sludge loss caused by filamentous bacterium expansion and improving biochemical performance.

Further, the short-cut nitrification reactor further comprises a lift pump 11, and the lift pump 11 is arranged between the feeding box 1 and the anoxic tank 2.

Further, the short-cut nitrification reactor further comprises an anoxic stirrer 21, and the anoxic stirrer 21 is arranged inside the anoxic tank 2.

Further, the short-cut nitrification reactor further comprises an air compressor 31, an aeration disc 32, a submersible stirrer 33, a dissolved oxygen monitor 34, a pH monitor 35, an internal reflux pump 36 and a PLC control cabinet 6, wherein the aeration disc 32, the dissolved oxygen monitor 34 and the pH monitor 35 are respectively arranged in the aerobic tank 3, the air compressor 31 is connected with the aeration disc 32, the submersible stirrer 33 is connected with the anoxic tank 2, the internal reflux pump 36 is arranged between the anoxic tank 2 and the aerobic tank 3, and the air compressor 31, the dissolved oxygen monitor 34 and the pH monitor 35 are respectively connected with the PLC control cabinet 6.

Further, the short-cut nitrification reactor further comprises a sludge reflux pump 41, and the sludge reflux pump 41 is arranged between the secondary sedimentation tank 4 and the anoxic tank 2.

Further, the short-cut nitrification reactor further comprises an electric ball valve 53 and a sludge recovery pump 54, the sludge recovery pump 54 is arranged between the hydrocyclone 5 and the anoxic tank 2, and the electric ball valve 53 is arranged on the hydrocyclone 5.

In this embodiment, sewage enters the anoxic tank 2 from the feed tank 1 through the lift pump 11, the anoxic stirrer 21 is disposed in the anoxic tank 2, and the sewage after anoxic treatment overflows into the aerobic tank 3; the aeration disc 32, the submersible stirrer 33, the dissolved oxygen monitor 34 and the pH monitor 35 are arranged in the aerobic tank 3, the internal reflux pump 36 is directly arranged in the anoxic tank 2 and the aerobic tank 3, the dissolved oxygen monitor 34 is connected with the PLC control cabinet 6, the running state of the air compressor 31 is adjusted according to the dissolved oxygen data output signal monitored in real time, the frequency of the air compressor 31 is reduced when the dissolved oxygen concentration is more than 1.0mg/L, and the frequency of the air compressor 31 is increased when the dissolved oxygen concentration is less than 0.3mg/L so as to maintain the low DO state in a short-range nitration system; the effluent of the aerobic tank 3 enters the secondary sedimentation tank 4, and the bottom of the secondary sedimentation tank 4 is provided with the sludge reflux pump 41 for refluxing the sludge to the anoxic tank 2; the effluent of the secondary sedimentation tank 4 flows into the hydrocyclone 5, activated sludge with larger specific gravity is discharged from the sludge discharge port 51 and is recycled to the anoxic tank 2 through the sludge recycling pump 54, the electric ball valve 53 is arranged at the sludge discharge port 51, excess sludge is discharged periodically, nitrous acid oxidizing bacteria can be elutriated out of the system, ammonia oxidizing bacteria gradually take the dominant role, short-cut nitrification starting is realized, and treated sewage is discharged from the overflow port 52; the hydrocyclone 5 is added behind the secondary sedimentation tank 4, so that the activated sludge with larger mass can be recovered, and the activated sludge with smaller mass flows out upwards along the middle overflow pipeline, thereby reducing the sludge loss caused by the expansion of the filamentous bacteria and improving the biochemical performance.

The above disclosure is only a preferred embodiment of the present utility model, and it should be understood that the scope of the utility model is not limited thereto, and those skilled in the art will appreciate that all or part of the procedures described above can be performed according to the equivalent changes of the claims, and still fall within the scope of the present utility model.

Claims

1. A short-cut nitrification reactor is characterized in that,

the anaerobic tank is communicated with the feeding tank, the aerobic tank is respectively communicated with the anaerobic tank and the secondary sedimentation tank, the secondary sedimentation tank is respectively communicated with the anaerobic tank and the hydrocyclone, the hydrocyclone is communicated with the anaerobic tank, and the hydrocyclone is provided with a mud discharge port and an overflow port.

2. A short-cut nitration reactor according to claim 1, characterized in that,

3. A short-cut nitration reactor according to claim 1, characterized in that,

the short-cut nitrification reactor further comprises an anoxic stirrer, and the anoxic stirrer is arranged in the anoxic tank.

4. A short-cut nitration reactor according to claim 1, characterized in that,

5. A short-cut nitration reactor according to claim 1, characterized in that,

6. A short-cut nitration reactor according to claim 1, characterized in that,