Integrated MBR membrane tank device for deep total nitrogen removal

Abstract

The utility model relates to a kind of integrated MBR membrane box device of depth total nitrogen, including box, sludge pool, anoxic tank, aerobic tank, membrane pool, water production pool and control cabinet are sequentially arranged in box;First filter is installed in control cabinet, and pump delivery pipeline and first backwash pipeline are arranged between water production pool and first filter;Second filter is installed in control cabinet, and pumping line is arranged in the input end of second filter, and water supply line is arranged between second filter and anoxic tank.The utility model can effectively reduce inorganic pollutants, total nitrogen pollutants into membrane box system by increasing self-cleaning filter in water inlet end, while can protect MBR membrane group, improve service life;Increase activated carbon filter in water outlet end, can further adsorb and remove ammonia nitrogen, total nitrogen and organic matter;Compact overall structure, integrate components in control cabinet, reduce floor area, facilitate later maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and in particular relates to an integrated MBR membrane box device for deep total nitrogen removal. Background Technology

[0002] The integrated MBR membrane tank is a new type of wastewater treatment equipment that combines membrane separation and biological treatment technologies. It has a wide range of applications and is particularly advantageous for emergency treatment scenarios involving surface water pollution such as rivers and lakes with low concentrations of COD, total nitrogen, permanganate, and ammonia nitrogen.

[0003] Currently, integrated MBR membrane tanks mostly adopt a main process combining an aerobic tank (O tank), an anoxic / aerobic tank (AO tank), or an anaerobic / anoxic / aerobic tank (A2O tank) with an MBR membrane system. The O tank and MBR membrane system process has a good effect on COD removal in slightly polluted water bodies, but it cannot effectively remove ammonia nitrogen and total nitrogen in the water. The AO tank and MBR membrane system can remove COD, ammonia nitrogen, and total nitrogen, but the removal effect of total nitrogen is generally only 10 mg / L. The A2O tank and MBR membrane system can remove high concentrations of COD, ammonia nitrogen, and total nitrogen, with better results, but the removal effect of total nitrogen still cannot meet the surface water environmental water quality standards (GB3838-2002).

[0004] Existing conventional MBR membrane boxes have problems such as excessive total nitrogen, large amount of inorganic sludge, high operation and maintenance costs, MBR membrane fiber rupture, and large membrane box size leading to high transportation costs. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an integrated MBR membrane tank device for deep total nitrogen removal that is compact in overall size, effectively removes total nitrogen, and is easy to maintain.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A deep total nitrogen removal integrated MBR membrane box device, comprising: The enclosure contains, in sequence, a sludge tank, an anoxic tank, an aerobic tank, a membrane tank, a permeate tank, and a central control cabinet. The first filter is installed in the central control cabinet, and a pumping pipeline and a first backwashing pipeline are provided between the product water tank and the first filter; The second filter is installed in the central control cabinet. The input end of the second filter is equipped with a water pumping pipe, and a water supply pipe is installed between the second filter and the anoxic tank. An aeration assembly, comprising a blower, a first aeration pipe group, and a second aeration pipe group; the blower is installed in a central control cabinet, and the output end of the blower is connected to the first aeration pipe group and the second aeration pipe group via a vent pipe; the first aeration pipe group and the second aeration pipe group are respectively installed in the aerobic tank and the membrane tank. Sludge pump; the sludge pump is installed in the central control cabinet, the input end of the sludge pump is connected to the membrane tank, and the output end of the sludge pump is connected to the sludge tank. The sludge pump is installed in the central control cabinet. The input end of the sludge pump is equipped with a sludge pipe that extends into the sludge tank, and the output end of the sludge pump is equipped with a sludge discharge pipe.

[0007] Furthermore, a water supply pipeline and a second backwash pipeline are provided between the membrane tank and the product water tank, and a chemical tank is connected to the second backwash pipeline using an ejector.

[0008] Furthermore, a reflux pipeline is provided between the aerobic tank and the anoxic tank, and a reflux pump is installed on the reflux pipeline. The input end of the reflux pump is connected to the aerobic tank.

[0009] Furthermore, an MBR membrane module is installed inside the membrane tank.

[0010] Furthermore, the water production tank is equipped with an external pump that supplies water to the first filter.

[0011] Furthermore, a water production pump for water delivery is installed on the pumping pipeline, and the water production pump is installed in the central control cabinet.

[0012] Furthermore, a first backwash pump is installed on the first backwash pipeline, and the input end of the first backwash pump is connected to the pipeline of the first filter; a second backwash pump is installed on the second backwash pipeline, and the input end of the second backwash pump is connected to the product water tank; the first backwash pump and the second backwash pump are installed in the central control cabinet.

[0013] Furthermore, a water pump is installed on the water pumping pipeline, and the input end of the water pump is connected to an external water source.

[0014] Furthermore, the first filter is an activated carbon filter, and the second filter is a self-cleaning filter.

[0015] Compared with the prior art, this utility model has the following advantages: This invention effectively reduces the entry of inorganic and total nitrogen pollutants into the membrane tank system by adding a self-cleaning filter at the water inlet, while protecting the MBR membrane module and extending its service life. An activated carbon filter at the water outlet further adsorbs and removes ammonia nitrogen, total nitrogen, and organic matter. The overall structure is compact, integrating all components into a central control box, reducing floor space and facilitating future maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] In the diagram: 1. Tank; 2. Sludge tank; 3. Anoxic tank; 4. Aerobic tank; 5. Membrane tank; 6. Permeate tank; 7. Control cabinet; 8. First filter; 9. Pumping pipeline; 10. First backwash pipeline; 11. Second filter; 12. Pumping pipeline; 13. Water supply pipeline; 14. Blower; 15. First aeration pipe assembly; 16. Second aeration pipe assembly; 17. Vent pipe; 18. Sludge pump; 19. Sludge pipe; 20. Sludge discharge pipe; 21. Water supply pipeline; 22. Second backwash pipeline; 23. Ejector; 24. Return pipeline; 25. Return pump; 26. MBR membrane module; 27. External pump; 28. Permeate pump; 29. ​​First backwash pump; 30. Second backwash pump; 31. Pumping pump; 32. Chemical tank; 33. Sludge pump. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1 As shown, this embodiment proposes an integrated MBR membrane box device for deep total nitrogen removal, which includes a box body 1, a first filter 8, a second filter 11, an aeration assembly, and a sludge pump 18; the box body 1 is used to provide installation space for each component; the first filter 8, the second filter 11, the aeration assembly, and the sludge pump 18 work together with each component to complete the wastewater treatment work. like Figure 1 As shown, the enclosure 1 contains, in sequence, a sludge tank 2, an anoxic tank 3, an aerobic tank 4, a membrane tank 5, a permeate tank 6, and a control cabinet 7. The sludge tank 2 is used to store sludge. The anoxic tank 3 is used to draw water, and the stored water flows into the aerobic tank 4 by gravity. The aerobic tank 4 is mainly used for nitrification by microorganisms and aerobic degradation of COD. The membrane tank 5 is used to intercept activated sludge, microorganisms, and suspended solids in the aerobic tank, replacing the sedimentation tank in traditional sewage treatment, achieving complete separation of water and sludge, resulting in extremely low turbidity and more stable water quality. The first filter 8 is installed in the central control cabinet 7. A pumping pipeline 9 and a first backwashing pipeline 10 are provided between the product water tank 6 and the first filter 8. After the water in the product water tank 6 is filtered by the first filter 8, it can adsorb pollutants such as small molecule organic matter, pigments, ammonia nitrogen, and total nitrogen remaining in the water. On the other hand, through the bio-adhesion effect on the surface of activated carbon, it can assist in the degradation of some recalcitrant nitrogen, and synergistically improve the total nitrogen removal efficiency. The backwash water flow of the first backwashing pipeline 10 restores the adsorption capacity of the filter media, and finally achieves the effect of deep treatment. The second filter 11 is installed in the central control cabinet 7. The input end of the second filter 11 is provided with a water pumping pipe 12. A water supply pipe 13 is provided between the second filter 11 and the anoxic tank 3. The water source to be treated enters the second filter 11 through the water pumping pipe 12, and after filtration, it enters the anoxic tank through the water supply pipe 13. The aeration assembly includes a blower 14, a first aeration pipe group 15, and a second aeration pipe group 16. The blower 14 is installed in the central control cabinet 7. The output end of the blower 14 is connected to the first aeration pipe group 15 and the second aeration pipe group 16 via a vent pipe 17. The first aeration pipe group 15 and the second aeration pipe group 16 are respectively installed in the aerobic tank 4 and the membrane tank 5. The aeration assembly is used to increase the oxygen concentration in the aerobic tank 4 and the membrane tank 5, which is beneficial to the growth of microorganisms. The sludge pump 33 is installed in the central control cabinet 7. The input end of the sludge pump 33 is connected to the membrane tank 5, and the output end of the sludge pump 33 is connected to the sludge tank 2. The sludge pump 33 can send the sludge in the membrane tank 5 into the sludge tank 2. The sludge pump 18 is installed in the central control cabinet 7. The input end of the sludge pump 18 is provided with a sludge pipe 19 that extends into the sludge tank 2, and the output end of the sludge pump 18 is provided with a sludge discharge pipe 20. The sludge pump 18 can discharge the sludge in the sludge tank 2.

[0020] Furthermore, a water supply pipeline 21 and a second backwash pipeline 22 are provided between the membrane tank 5 and the product water tank 6, and the treated water in the membrane tank 5 enters the product water tank 6 through the water supply pipeline 21. The second backwash line 22 is connected to a chemical tank 32 via an ejector 23. The ejector 23 replaces the dosing pump, saving costs (the ejector is connected to an external air source, replacing the vacuum system); the chemical tank 32 is used to store acid and alkali washing materials.

[0021] Furthermore, a return pipeline 24 is provided between the aerobic tank 4 and the anoxic tank 3. A return pump 25 is provided on the return pipeline 24. The input end of the return pump 25 is connected to the aerobic tank 4. The nitrified liquid from the aerobic tank enters the anoxic tank 3 through the return pipeline 24, which facilitates the denitrification of the water in the anoxic tank 3.

[0022] Furthermore, the membrane tank 5 is equipped with an MBR membrane module 26. The retention effect of the MBR membrane module 26 can maintain an extremely high concentration of microorganisms in the aerobic tank, improve the degradation efficiency of organic pollutants, and reduce the footprint of the sewage treatment facility.

[0023] Furthermore, the water production tank 6 is equipped with an external pump 27 that supplies water to the first filter 8. The water in the water production tank 6 is pumped to the first filter 8 by the external pump 27 for filtration.

[0024] Furthermore, a water production pump 28 for water delivery is installed on the pumping pipeline 9, and the water production pump 28 is installed in the central control cabinet 7.

[0025] Furthermore, a first backwash pump 29 is installed on the first backwash pipeline 10, and the input end of the first backwash pump 29 is connected to the pipeline of the first filter 8; a second backwash pump 30 is installed on the second backwash pipeline 22, and the input end of the second backwash pump 30 is connected to the product water tank 6. The first backwash pump 29 and the second backwash pump 30 are installed in the central control cabinet 7.

[0026] Furthermore, a water pump 31 is installed on the water pumping pipeline 12. The input end of the water pump 31 is connected to an external water source, and the water pumping pipeline 12 is used to pump sewage.

[0027] Furthermore, the first filter 8 is an activated carbon filter, which can better achieve efficient interception and treatment of pollutants; The second filter 11 is a self-cleaning filter used to remove suspended inorganic solids and total nitrogen pollutants from the water, thereby reducing some total nitrogen organic pollutants at the source, protecting the subsequent biological system and MBR membrane system, reducing sludge load and the introduction of total nitrogen pollutants. Its filtration accuracy reaches the micron level and can maintain filtration efficiency through automatic backwashing function.

[0028] Working principle: In use, the water to be treated enters the second filter 11 through the pumping pipe 12, and after filtration, it enters the anoxic tank 3 through the water delivery pipe 13. The second filter 11 is a self-cleaning filter, which reduces some total nitrogen organic pollutants at the source and has an automatic backwashing function to maintain the filtration effect. The anoxic tank 3 is used to receive water. The water in the anoxic tank 3 flows into the aerobic tank 4 by gravity. In the aerobic tank 4, the water mainly undergoes nitrification by microorganisms and aerobic degradation of COD. Nitrifying bacteria convert ammonia nitrogen in the sewage into nitrate. A return pipe 24 is installed between the aerobic tank 4 and the anoxic tank 3. The treated water in the aerobic tank 4 can be transported to the anoxic tank 3 through the return pipe 24. The anoxic tank 3 mainly carries out the denitrification reaction of microorganisms. Using denitrifying bacteria, the various nitrates returned from the aerobic tank 4 are converted into nitrogen gas, achieving the effect of denitrification (at the same time, this process can also treat some organic matter and reduce the COD water quality index). The treated water in the aerobic tank 4 can enter the membrane tank 5, which is equipped with an MBR membrane module 26. The MBR membrane module 26 uses hollow fiber membranes or flat sheet membranes with micron-sized pores to intercept activated sludge, microorganisms and suspended solids in the aerobic tank 4, replacing the sedimentation tank in traditional sewage treatment, achieving complete separation of water and sludge, with extremely low turbidity and more stable water quality. Afterward, the water enters the product water tank 6 through the pump pipeline 9, and is then sent to the first filter 8 for filtration by the external pump 27. The first filter 8 is an activated carbon filter, which can better achieve efficient interception and treatment of pollutants, and can restore the adsorption capacity of the filter media through the backwash water flow of the first backwash pipeline 10, achieving the effect of deep treatment of sewage. The sludge produced in membrane tank 5 can be pumped into sludge tank 1 by sludge pump 33 and then discharged by sludge pump 18. The aerobic tank 4 and the membrane tank 5 are equipped with a first aeration pipe group 15 and a second aeration pipe group 16, which can better facilitate biological reactions.

[0029] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and this utility model is not limited thereto. Those skilled in the art can make various modifications and improvements without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. An integrated MBR membrane reactor for deep total nitrogen removal, characterized in that, include: The box (1) contains, in sequence, a sludge tank (2), an anoxic tank (3), an aerobic tank (4), a membrane tank (5), a product water tank (6), and a central control cabinet (7). The first filter (8) is installed in the central control cabinet (7), and a pumping pipeline (9) and a first backwashing pipeline (10) are provided between the water production tank (6) and the first filter (8). The second filter (11) is installed in the central control cabinet (7). The input end of the second filter (11) is provided with a water pumping pipe (12). A water supply pipe (13) is provided between the second filter (11) and the anoxic tank (3). The aeration assembly includes a blower (14), a first aeration pipe group (15), and a second aeration pipe group (16). The blower (14) is installed in the central control cabinet (7). The output end of the blower (14) is connected to the first aeration pipe group (15) and the second aeration pipe group (16) via a ventilation pipe (17). The first aeration pipe group (15) and the second aeration pipe group (16) are respectively installed in the aerobic tank (4) and the membrane tank (5). Sludge pump (33); The sludge pump (33) is installed in the central control cabinet (7). The input end of the sludge pump (33) is connected to the membrane tank (5), and the output end of the sludge pump (33) is connected to the sludge tank (2). The sludge pump (18) is installed in the central control cabinet (7). The input end of the sludge pump (18) is provided with a sludge pipe (19) that extends into the sludge tank (2), and the output end of the sludge pump (18) is provided with a sludge discharge pipe (20).

2. The integrated MBR membrane reactor for deep total nitrogen removal according to claim 1, characterized in that, A water supply pipeline (21) and a second backwash pipeline (22) are provided between the membrane tank (5) and the product water tank (6). A medicine tank (32) is connected to the second backwash pipeline (22) by a jet nozzle (23).

3. The integrated MBR membrane reactor for deep total nitrogen removal according to claim 1, characterized in that, A return pipeline (24) is provided between the aerobic tank (4) and the anoxic tank (3), and a return pump (25) is provided on the return pipeline (24). The input end of the return pump (25) is connected to the aerobic tank (4).

4. The integrated MBR membrane reactor for deep total nitrogen removal according to claim 1, characterized in that, The membrane tank (5) is equipped with an MBR membrane module (26).

5. The integrated MBR membrane reactor for deep total nitrogen removal according to claim 1, characterized in that, The water production tank (6) is equipped with an external pump (27) that supplies water to the first filter (8).

6. The integrated MBR membrane reactor for deep total nitrogen removal according to claim 1, characterized in that, The pumping pipeline (9) is equipped with a water production pump (28) for water delivery, and the water production pump (28) is installed in the central control cabinet (7).

7. The integrated MBR membrane reactor for deep total nitrogen removal according to claim 2, characterized in that, A first backwash pump (29) is installed on the first backwash pipeline (10), and the input end of the first backwash pump (29) is connected to the pipeline of the first filter (8); a second backwash pump (30) is installed on the second backwash pipeline (22), and the input end of the second backwash pump (30) is connected to the product water tank (6). The first backwash pump (29) and the second backwash pump (30) are installed in the central control cabinet (7).

8. The integrated MBR membrane reactor for deep total nitrogen removal according to claim 1, characterized in that, A water pump (31) is installed on the water pumping pipeline (12), and the input end of the water pump (31) is connected to an external water source.

9. The integrated MBR membrane unit for deep total nitrogen removal according to claim 1, characterized in that, The first filter (8) is an activated carbon filter, and the second filter (11) is a self-cleaning filter.

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