CN216687842U

CN216687842U - Integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage

Info

Publication number: CN216687842U
Application number: CN202220049851.5U
Authority: CN
Inventors: 孟宪忠
Original assignee: Beijing Wanquan Qingyuan Technology Co ltd
Current assignee: Beijing Wanquan Qingyuan Technology Co ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-06-07
Anticipated expiration: 2032-01-10

Abstract

The utility model discloses an integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage, which comprises a water inlet grating tank, an adjusting tank, an anoxic A tank, an aerobic tank, an anoxic B tank, an MBR membrane tank, a phosphorus removal tank and a middle water tank which are sequentially communicated, wherein a nitrifying liquid reflux pump is arranged in the aerobic tank, a pipeline of the nitrifying liquid reflux pump is communicated with the anoxic A tank and conveys refluxed nitrifying liquid to the anoxic A tank, a sludge reflux pump for sludge reflux and outward discharge is arranged in the MBR membrane tank, one pipeline of the sludge reflux pump is communicated with the anoxic A tank, and the other pipeline of the sludge reflux pump is communicated with a sludge concentration tank; the device has the advantages that a pipeline for introducing ozone and a phosphorus removing agent is arranged on one side of a water inlet of the phosphorus removing tank, and a pipeline for conveying ozone tail gas is communicated between the phosphorus removing tank and the regulating tank.

Description

Integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage

Technical Field

The utility model relates to a high ammonia nitrogen sewage treatment device, in particular to an integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage.

Background

In the prior art, high ammonia nitrogen sewage is compared with ordinary municipal sewage treatment, mainly has following characteristics: the sewage quality and water quantity change is large, the COD concentration (the content of organic matters in the wastewater) is low, the ammonia nitrogen concentration is high, and the ratio of C to N to P is unreasonable; as no mature engineering application example can be referred to in engineering design, the problems of overproof total nitrogen, high chroma, difficult standard treatment, recycled reclaimed water recycling and the like generally exist in the effluent indexes of the prior high ammonia nitrogen sewage treatment process system. Based on the characteristics and the problems, the treatment of the high ammonia nitrogen sewage needs to find an integrated sewage treatment device and a process technology which have qualified effluent indexes after treatment, small production amount of residual sludge, low investment, low operating cost, short debugging and starting time, simple and convenient operation and suitable recycled water.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the technology, the utility model provides an integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage.

In order to solve the technical problems, the utility model adopts the technical scheme that: an integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage comprises a water inlet grating tank, an adjusting tank, an anoxic A tank, an aerobic tank, an anoxic B tank, an MBR membrane tank, a phosphorus removal tank and a middle water tank which are sequentially communicated, wherein a nitrifying liquid reflux pump is arranged in the aerobic tank, a pipeline of the nitrifying liquid reflux pump is communicated with the anoxic A tank and conveys refluxed nitrifying liquid to the anoxic A tank, a sludge reflux pump for sludge reflux and outward discharge is arranged in the MBR membrane tank, one pipeline of the sludge reflux pump is communicated with the anoxic A tank, and the other pipeline of the sludge reflux pump is communicated with a sludge concentration tank; a pipeline for introducing ozone and a phosphorus removing agent is arranged on one side of a water inlet of the phosphorus removing tank, a pipeline for conveying ozone tail gas is communicated between the phosphorus removing tank and the regulating tank, and a pipeline for communicating the sludge concentration tank to discharge sludge is arranged in the phosphorus removing tank.

Furthermore, a grid for intercepting suspended matters in the sewage is arranged in the water inlet grid pond; be provided with the elevator pump in the equalizing basin, the pipeline intercommunication oxygen deficiency A pond of elevator pump.

Further, a first water inlet is formed in the upper part of the anoxic A tank, and the anoxic A tank is communicated with the regulating tank through the first water inlet; the lower part of the anoxic A tank is communicated with the lower part of the aerobic tank through a first water passing hole, the upper part of the anoxic B tank is provided with a second water inlet, and the anoxic B tank is communicated with the aerobic tank through the second water inlet.

Furthermore, the first water inlet and the second water inlet are both connected with a carbon source dosing device.

Further, the lower part of the anoxic B tank is communicated with the lower part of the MBR membrane tank through a second water passing hole.

Further, a membrane tank self-priming pump is arranged on a pipeline between the MBR membrane tank and the phosphorus removal tank, an inlet for introducing ozone and an inlet for introducing a phosphorus removal agent are arranged on a pipeline between the MBR membrane tank and the phosphorus removal tank, and the inlet for the phosphorus removal agent is connected with a phosphorus removal agent dosing device.

Furthermore, the water distributors arranged on the pipelines of the nitrifying liquid reflux pump comprise a first water distributor and a second water distributor, the first water distributor and the second water distributor are positioned in the anoxic A tank, and the anoxic A tank is stirred through the first water distributor and the second water distributor.

Furthermore, a circulating stirring pump is arranged in the anoxic B tank, and the anoxic B tank is stirred by a third water distributor arranged on a pipeline of the circulating stirring pump.

Furthermore, the integrated device also comprises an aeration fan, wherein a fourth water distributor and a fifth water distributor are arranged on the pipeline of the aeration fan, the fourth water distributor is positioned in the aerobic tank, and the fifth water distributor is positioned in the MBR membrane tank; a pipeline for conveying ozone tail gas is communicated between the dephosphorization tank and the regulating reservoir, and a number six water distributor is arranged on the pipeline and is positioned in the regulating reservoir.

Furthermore, maintenance access holes are formed above the anoxic tank A, the aerobic tank and the anoxic tank B.

The utility model discloses an integrated treatment device for deeply removing total nitrogen from high-ammonia nitrogen sewage, which has the advantages of high biochemical treatment efficiency, low energy consumption, stable effluent quality, strong impact load resistance, compact structure, small volume, high activated sludge concentration, less generated residual sludge, no need of adding biological filler, difficult blockage and quite simple maintenance and management; the equipment is integrated, standardized and modularized, the bottleneck problem of large-scale application is solved, the equipment is particularly suitable for emergency treatment of high ammonia nitrogen sewage and upgrading and capacity expansion transformation of small municipal sewage treatment plants (stations), and the equipment has wide application prospect.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic structural diagram of an anoxic A tank, an aerobic tank and an anoxic B tank of the utility model.

In the figure: 1. a water inlet grille pool; 2. a regulating tank; 3. a lift pump; 4. an anoxic A pool; 5. an aerobic tank; 6. a nitrifying liquid reflux pump; 7. an anoxic B tank; 8. a circulating stirring pump; 9. an MBR membrane tank; 10. a sludge reflux pump; 11. a phosphorus removal tank; 12. a middle water pool; 13. a membrane pool self-priming pump; 14. a phosphorus removing agent adding device; 15. a carbon source dosing device; 16. an aeration fan; 17. a first water inlet; 18. a water distributor I; 19. a manhole is overhauled; 20. a second water distributor; 21. a second water inlet; 22. a third water distributor; 23. a second water passing hole; 24. a grid; 25. a first water passing hole; 26. a fourth water distributor; 27. a fifth water distributor; 28. a sixth water distributor; 29. sludge thickening tank.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage as shown in fig. 1 and fig. 2 comprises a water inlet grating tank 1, an adjusting tank 2, an anoxic A tank 4, an aerobic tank 5, an anoxic B tank 7, an MBR membrane tank 9, a dephosphorization tank 11 and a middle water tank 12 which are sequentially communicated, wherein a grating 24 for intercepting suspended matters in the sewage is arranged in the water inlet grating tank 1, the suspended matters in the sewage are intercepted by the grating and then flow into the adjusting tank 2, a lifting pump 3 is arranged in the adjusting tank 2, a pipeline of the lifting pump 3 is communicated with the anoxic A tank 4, when the liquid level of the sewage collected by the adjusting tank 2 reaches a set water level, the lifting pump 3 is started to lift the high ammonia nitrogen sewage into the anoxic A tank 4 for biochemical treatment, the upper part of the anoxic A tank 4 is provided with a first water inlet 17, the sludge in the MBR membrane tank 9 flows back to the first water inlet 117 of the anoxic A tank, and the anoxic A tank 4 is communicated with the adjusting tank 2 through the first water inlet 17; the lower part of the anoxic A tank 4 is communicated with the lower part of the aerobic tank 5 through a first water through hole 25, the water inlet mode of the anoxic A tank 4 is that water enters from the top and flows out from the bottom, sewage of the anoxic A tank 4 automatically flows into the aerobic tank 5, a nitrified liquid reflux pump 6 is arranged in the aerobic tank 5, a pipeline of the nitrified liquid reflux pump 6 is communicated with the anoxic A tank 4 and conveys refluxed nitrified liquid to the anoxic A tank 4, the nitrified liquid reflux pump 6 is arranged at a position 2.0 meters below the highest water level in the tank so as to be beneficial to increasing the water head pressure of a reflux pump outlet and enhancing the stirring effect on the anoxic A tank 4, a water distributor arranged on the pipeline of the nitrified liquid reflux pump 6 comprises a first water distributor 18 and a second water distributor 20, the first water distributor 18 and the second water distributor 20 are positioned in the anoxic A tank 4, and the anoxic A tank 4 is stirred through the first water distributor 18 and the second water distributor 20.

A circulating stirring pump 8 is arranged in the anoxic B tank 7, and the anoxic B tank 7 is stirred by a third water distributor 22 arranged on a pipeline of the circulating stirring pump 8. The upper part of the anoxic B tank 7 is provided with a second water inlet 21, the anoxic B tank 7 is communicated with the aerobic tank 5 through the second water inlet 21, and the lower part of the anoxic B tank 7 is communicated with the lower part of the MBR membrane tank 9 through a second water passing hole 23. The water inlet mode of the anoxic B tank 7 is upper water inlet and lower water outlet. The first water inlet 17 and the second water inlet 21 are both connected with a carbon source dosing device 15, the carbon source dosing device 15 provides a carbon source, and the carbon source is preferably sodium acetate, methanol, glucose, starch or flour.

A sludge reflux pump 10 for sludge reflux and outward discharge is arranged in the MBR membrane tank 9, one path of a pipeline of the sludge reflux pump 10 is communicated with the anoxic A tank 4, the total amount of sludge refluxed to the anoxic A tank 4 in the MBR membrane tank 9 is required to be adjusted according to the running condition, the reflux amount and reflux ratio of the sludge are controlled by a valve, and the DO in the anoxic A tank is kept to be optimal between 0.1 mg/L and 0.3 mg/L; the other path of the pipeline of the sludge reflux pump 10 is communicated with a sludge concentration tank 29; a pipeline for introducing ozone and a phosphorus removing agent is arranged on one side of a water inlet of the phosphorus removing tank 11, a membrane tank self-sucking pump 13 is arranged on the pipeline between the MBR membrane tank 9 and the phosphorus removing tank 11, an inlet for introducing ozone and an inlet for introducing the phosphorus removing agent are arranged on the pipeline between the MBR membrane tank 9 and the phosphorus removing tank 11, the inlet for the phosphorus removing agent is connected with a phosphorus removing agent dosing device 14, the phosphorus removing agent is an inorganic salt coagulant (PAC), and specifically is polymeric ferric sulfate, aluminum sulfate, polymeric aluminum chloride, polymeric aluminum ferric, aluminum potassium sulfate (alum), sodium aluminate and the like. The dephosphorization tank 11 communicates with the equalizing basin 2 between have the pipeline of carrying ozone tail gas, is used for the equalizing basin deodorization to remove the flavor and clear up of ozone tail gas, lets in ozone tail gas at equalizing basin 2 and is used for the stirring homogeneity of sewage and removes the flavor deodorization, and the dephosphorization retort adopts leading ozone disinfection, oxidizes the phosphorous acid that the MBR membrane goes out the water in that the solubility is high into orthophosphoric acid, can improve the dephosphorization rate of dephosphorization agent to reduce the medicament consumption. A pipeline for conveying ozone tail gas is communicated between the phosphorus removal tank 11 and the regulating tank 2, a sixth water distributor 28 is arranged on the pipeline, the sixth water distributor 28 is positioned in the regulating tank 2, a pipeline communicated with a sludge concentration tank 29 for sludge discharge is arranged in the phosphorus removal tank 11, biochemical excess sludge and phosphorus removal sludge can be periodically discharged into the sludge concentration tank for temporary storage, then sludge dewatering is carried out through a sludge dewatering machine, the water content of the sludge is reduced to below 80%, and the treated sludge cake is transported outside for disposal.

The integrated device also comprises an aeration fan 16, preferably a spiral-flow type aerator, wherein a fourth water distributor 26 and a fifth water distributor 27 are arranged on the aeration fan 16 through a pipeline, the fourth water distributor 26 is positioned in the aerobic tank 5, the fifth water distributor 27 is positioned in the MBR membrane tank 9, sewage automatically flows into the anoxic B tank 7 after being aerated and oxidized, and in order to prevent the problem of sludge floating or clogging caused by overhigh sludge concentration, biological fillers are not arranged in the anoxic A tank 4, the anoxic B tank 7 and the aerobic tank 5, when the system runs, the sludge concentration in the anoxic tank and the aerobic tank can be kept between 50 and 90 percent by adjusting the sludge reflux quantity of the MBR tank 9, the higher sludge concentration can maintain the DO in the anoxic tank to be less than 0.3mg/L stably, and the denitrification efficiency is improved; meanwhile, the high activated sludge concentration is kept in the aerobic tank 5, the iterative proliferation effect of microorganisms is enhanced, DO can be stably controlled to be 2.0-3.0 mg/L, the utilization rate of oxygen is improved, and the reduction of the aeration quantity of a fan is facilitated. The aerobic activated sludge in the MBR membrane tank has high concentration, is beneficial to the reproduction of nitrifying microbial flora, converts ammonia nitrogen into nitrate nitrogen, and has excellent effect on removing the ammonia nitrogen.

In addition, the upper parts of the anoxic A tank 4, the aerobic tank 5 and the anoxic B tank 7 are all provided with maintenance access holes 19.

The integrated treatment device for deeply removing the total nitrogen from the high ammonia nitrogen sewage adopts an AOA activated sludge process and MBR membrane combined process, and has the remarkable advantages of high ammonia nitrogen load impact resistance, long sludge age and less excess sludge. Ammonia nitrogen and refractory organics can be removed, and the ammonia nitrogen load is high; because the microorganism is completely intercepted in the bioreactor, the interception and growth of the microorganism with slow proliferation, such as nitrobacteria, are facilitated, and the nitrification efficiency of the biochemical system is improved. Meanwhile, the hydraulic retention time of some refractory organics in the system can be prolonged, which is beneficial to improving the degradation efficiency of the refractory organics.

The utility model discloses an integrated treatment device for deeply removing total nitrogen from high-ammonia nitrogen sewage, which is characterized in that a pump power stirring and pipeline water distributor mode is adopted in an anoxic A pool and an anoxic B pool, so that the defects that sludge is easy to silt and float and a stirring dead zone exists in the anoxic pool adopting a common submersible stirrer are overcome, the sludge concentration in the anoxic pool of the system is 5-10 times that of the sludge in the anoxic pool adopting the common stirrer, the total concentration can reach 50-100 g/L, the growth of denitrifying bacteria is facilitated, the denitrifying denitrification effect is enhanced, and the total nitrogen removal rate is greatly improved. The stirring mode of the submersible sewage pump and the water distributor can create an even anoxic environment in the anoxic tank, and solves the defects that sludge floats upwards and deposits due to uneven stirring of the submerged stirrer in the anoxic tank and the problems that the submerged sludge stirrer has stirring dead angles.

The operation management is convenient, and the automatic control is easy to realize: the integrated treatment device for deeply removing the total nitrogen from the high-ammonia nitrogen sewage adopts an MBR membrane process to realize the complete separation of Hydraulic Retention Time (HRT) and Sludge Retention Time (SRT), the operation control is more flexible and stable, and the microcomputer automatic control can be realized, so that the operation management is more convenient.

The integrated treatment device for deeply removing the total nitrogen from the high-ammonia nitrogen sewage has the advantages of high biochemical treatment efficiency, low energy consumption, stable effluent quality, strong impact load resistance, compact structure, small volume, high activated sludge concentration, less generated residual sludge, no need of adding biological filler, difficulty in blockage and quite simple maintenance and management; the equipment is integrated, standardized and modularized, the bottleneck problem of large-scale application is solved, the equipment is particularly suitable for emergency treatment of high ammonia nitrogen sewage and upgrading and capacity expansion transformation of small municipal sewage treatment plants (stations), and the equipment has wide application prospect.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.

Claims

1. The utility model provides an integrated device that total nitrogen was handled is removed to high ammonia nitrogen sewage degree of depth which characterized in that: the device comprises a water inlet grille pool (1), a regulating pool (2), an anoxic A pool (4), an aerobic pool (5), an anoxic B pool (7), an MBR membrane pool (9), a dephosphorization tank (11) and a reclaimed water pool (12) which are sequentially communicated, wherein a nitrifying liquid reflux pump (6) is arranged in the aerobic pool (5), a pipeline of the nitrifying liquid reflux pump (6) is communicated with the anoxic A pool (4) and conveys refluxed nitrifying liquid to the anoxic A pool (4), a sludge reflux pump (10) for sludge reflux and outward discharge is arranged in the MBR membrane pool (9), one pipeline of the sludge reflux pump (10) is communicated with the anoxic A pool (4), and the other pipeline is communicated with a sludge concentration pool (29); a pipeline for introducing ozone and a phosphorus removing agent is arranged on one side of a water inlet of the phosphorus removing tank (11), a pipeline for conveying ozone tail gas is communicated between the phosphorus removing tank (11) and the regulating tank (2), and a pipeline for communicating the sludge concentration tank (29) to discharge sludge is arranged in the phosphorus removing tank (11).

2. The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage according to claim 1, characterized in that: a grid (24) for intercepting suspended matters in the sewage is arranged in the water inlet grid pool (1); a lifting pump (3) is arranged in the adjusting tank (2), and a pipeline of the lifting pump (3) is communicated with the anoxic A tank (4).

3. The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage according to claim 2, which is characterized in that: the upper part of the anoxic A tank (4) is provided with a first water inlet (17), and the anoxic A tank (4) is communicated with the regulating tank (2) through the first water inlet (17); the lower part of the anoxic A tank (4) is communicated with the lower part of the aerobic tank (5) through a first water passing hole (25), the upper part of the anoxic B tank (7) is provided with a second water inlet (21), and the anoxic B tank (7) is communicated with the aerobic tank (5) through the second water inlet (21).

4. The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage according to claim 3, which is characterized in that: the first water inlet (17) and the second water inlet (21) are both connected with a carbon source dosing device (15).

5. The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage according to claim 4, which is characterized in that: the lower part of the anoxic B tank (7) is communicated with the lower part of the MBR membrane tank (9) through a second water passing hole (23).

6. The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage according to claim 5, which is characterized in that: be provided with membrane cisterna self priming pump (13) on the pipeline between MBR membrane cisterna (9) and dephosphorization tank (11), be provided with the entry that lets in ozone and the entry of dephosphorization agent on the pipeline between MBR membrane cisterna (9) and dephosphorization tank (11), the entry linkage of dephosphorization agent has dephosphorization agent charge device (14).

7. The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage according to claim 6, which is characterized in that: the water distributors arranged on the pipelines of the nitrifying liquid reflux pump (6) comprise a first water distributor (18) and a second water distributor (20), the first water distributor (18) and the second water distributor (20) are located in the anoxic A tank (4), and the anoxic A tank (4) is stirred through the first water distributor (18) and the second water distributor (20).

8. The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage according to claim 7, which is characterized in that: a circulating stirring pump (8) is arranged in the anoxic B tank (7), and the anoxic B tank (7) is stirred by a third water distributor (22) arranged on a pipeline of the circulating stirring pump (8).

9. The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage according to claim 8, which is characterized in that: the integrated device also comprises an aeration fan (16), wherein the aeration fan (16) is provided with a fourth water distributor (26) and a fifth water distributor (27) through pipelines, the fourth water distributor (26) is positioned in the aerobic tank (5), and the fifth water distributor (27) is positioned in the MBR membrane tank (9); a pipeline for conveying ozone tail gas is communicated between the phosphorus removal tank (11) and the regulating tank (2), and a number six water distributor (28) is arranged on the pipeline, and the number six water distributor (28) is positioned in the regulating tank (2).

10. The integrated device for deep total nitrogen removal treatment of high ammonia nitrogen sewage according to claim 9, which is characterized in that: and the upper parts of the anoxic A tank (4), the aerobic tank (5) and the anoxic B tank (7) are provided with access holes (19).