CN215975452U - Wastewater treatment device adopting membrane structure - Google Patents
Wastewater treatment device adopting membrane structure Download PDFInfo
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- CN215975452U CN215975452U CN202122586885.6U CN202122586885U CN215975452U CN 215975452 U CN215975452 U CN 215975452U CN 202122586885 U CN202122586885 U CN 202122586885U CN 215975452 U CN215975452 U CN 215975452U
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Abstract
The utility model discloses a wastewater treatment device adopting a membrane structure, which comprises a sewage pretreatment system and a membrane filtration system, wherein the membrane filtration system comprises an ultrafiltration membrane filtration device and a reverse osmosis membrane filtration device, and the sewage pretreatment system, the ultrafiltration membrane filtration device and the reverse osmosis membrane filtration device are sequentially connected; the sewage pretreatment system comprises a flocculation tank, an air flotation tank and a degradation tank which are connected in sequence; the degradation pond is connected with milipore filter equipment, and milipore filter equipment connects the equalizing basin, and the inlet of one-level reverse osmosis unit is connected behind the heat exchanger to the equalizing basin, and the clear liquid export of one-level reverse osmosis unit is connected with the inlet of second grade reverse osmosis unit, all is provided with high flux reverse osmosis membrane in one-level reverse osmosis unit and second grade reverse osmosis unit. The utility model can convert sewage into desalted water which is convenient for industrial application, thereby utilizing a large amount of wastewater resources, having obvious resource and environmental protection benefits, and having the advantages of high desalination rate, stable effluent quality and the like.
Description
Technical Field
The utility model relates to the field of wastewater treatment, in particular to a wastewater treatment device adopting a membrane structure.
Background
Water resources are the important foundation of social and economic development and also the important constituent of ecological environment systems. The reasonable allocation of water resources is an extremely important strategic problem, which is related to the healthy development of economy, the stable harmony of society and the balance and stability of ecological environment. At present, in the face of the problems of water resource shortage, water pollution aggravation and water demand increase, waste water is treated, so that the water sources become available resources, the requirements of people on fresh water are met, and the problem to be solved urgently is solved.
At present, the process technologies related to wastewater treatment comprise an ion exchange resin technology, a membrane separation technology, an EDI technology and the like, and although the technologies have the characteristics, the defects exist, for example, the ion exchange resin technology easily generates a large amount of waste acid and waste alkali liquor to cause environmental pollution, the EDI technology has the problems of high cost, unstable effluent quality and the like, and therefore, the main treatment process is realized by orderly and cooperatively matching the technologies for wastewater treatment.
Disclosure of Invention
Based on the technical problem, the utility model provides a wastewater treatment device adopting a membrane structure.
The technical solution adopted by the utility model is as follows:
a wastewater treatment device adopting a membrane structure comprises a wastewater pretreatment system and a membrane filtration system, wherein the membrane filtration system comprises an ultrafiltration membrane filtration device and a reverse osmosis membrane filtration device which are sequentially connected;
the sewage pretreatment system comprises a flocculation tank, an air flotation tank and a degradation tank, wherein an inlet of the flocculation tank is communicated with the sewage tank through a first conveying pipeline, a flocculating agent adding pipeline is arranged above the flocculation tank, and an outlet of the flocculation tank is communicated with an inlet of the air flotation tank through a second conveying pipeline; an aeration pipeline is arranged at the bottom of the air floatation tank and is communicated with a gas conveying pipeline, and an outlet of the air floatation tank is communicated with the degradation tank through a third conveying pipeline; the biological filler is arranged in the degradation tank, and the outlet of the degradation tank is connected with the inlet of the ultrafiltration membrane filtering device through a fourth conveying pipeline;
the export of milipore filter equipment passes through the import of fifth pipeline connection equalizing basin, it adds the pipeline to be provided with the adjusting material in the top of equalizing basin, the export of equalizing basin passes through the tube side access connection of sixth pipeline and heat exchanger, the tube side export of heat exchanger passes through the inlet of seventh pipeline connection one-level reverse osmosis unit, the clear liquid export of one-level reverse osmosis unit is connected with the inlet of second grade reverse osmosis unit through eighth pipeline, all be provided with high flux reverse osmosis membrane in one-level reverse osmosis unit and second grade reverse osmosis unit.
Preferably, the clear liquid outlet of the second-stage reverse osmosis unit is connected with the inlet of the ion exchange resin treatment unit through a ninth conveying pipeline, the outlet of the ion exchange resin treatment unit is connected with the inlet of the purification unit through a tenth conveying pipeline, and the outlet of the purification unit is connected with the pure water tank.
Preferably, a partition wall is arranged in the sewage tank, the partition wall divides the sewage tank into a sewage storage area and a sewage pre-filtering area, a felt is arranged above the sewage pre-filtering area, a screen for filtering solid waste is arranged at an outlet of the sewage pre-filtering area, and an outlet of the sewage pre-filtering area is connected with the first conveying pipeline.
Preferably, the degradation pond is separated for anaerobic degradation pond and the aerobic degradation pond of intercommunication each other, all is provided with a plurality of baffles in anaerobic degradation pond and the inside in aerobic degradation pond, and adjacent baffle is parallel dislocation arrangement.
Preferably, the ultrafiltration membrane filtering device is a membrane filtering device for filtering out particles with the molecular weight of more than 500 and the particle diameter of more than 10 nm.
Preferably, the adjusting material adding pipeline comprises a reducing agent adding pipeline, a scale inhibitor adding pipeline and an acid solution adding pipeline.
Preferably, the concentrated solution outlet of the second-stage reverse osmosis unit is communicated with the liquid inlet of the first-stage reverse osmosis unit through an eleventh conveying pipeline.
Preferably, the reverse osmosis membrane system is further connected with a backwashing device, the backwashing device comprises a backwashing water pipeline and a filter, and the backwashing water pipeline comprises a first backwashing water input pipeline, a first backwashing water discharge pipeline, a second backwashing water input pipeline and a second backwashing water discharge pipeline;
the reverse osmosis water inlet of first backwash water input pipeline and second grade reverse osmosis unit is linked together, and the reverse osmosis delivery port of second grade reverse osmosis unit is connected with the one end of first backwash water discharge pipeline, and the water inlet of filter is connected to the other end of first backwash water discharge pipeline, and the delivery port of filter is connected with the one end of second backwash water input pipeline, and the reverse osmosis water inlet of one-level reverse osmosis unit is connected to the other end of second backwash water input pipeline, and second backwash water discharge pipeline is connected to the reverse osmosis delivery port of one-level reverse osmosis unit.
Preferably, the ion exchange resin treatment unit adopts sodium ion exchange resin.
Preferably, the purification unit employs an ozone sterilization device or an ultraviolet sterilization device.
The beneficial technical effects of the utility model are as follows:
the utility model combines the sewage pretreatment system and the membrane filtration system, can convert sewage into desalted water which is convenient for industrial application, thereby utilizing a large amount of wastewater resources, and has obvious resource and environmental protection benefits.
In addition, the utility model further combines the reverse osmosis membrane technology and the ion exchange technology, and uses the early-stage ultrafiltration membrane filtration and the two-stage reverse osmosis unit as the pretreatment technology before the ion exchange resin treatment, thereby not only ensuring the stable quality of the effluent water and prolonging the service life of the resin, but also being more environment-friendly.
Drawings
The utility model will be further described with reference to the following detailed description and drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the degradation tank of the present invention.
Detailed Description
Combine the attached drawing, an adopt effluent treatment plant of membrane structure, including sewage pretreatment systems and membrane filtration system, membrane filtration system includes milipore filter equipment 1 and reverse osmosis membrane filter equipment, and sewage pretreatment systems, milipore filter equipment and reverse osmosis membrane filter equipment connect gradually. The sewage pretreatment system comprises a flocculation tank 2, an air flotation tank 3 and a degradation tank 4, wherein an inlet of the flocculation tank 2 is communicated with a sewage tank 6 through a first conveying pipeline 5, and a flocculating agent adding pipeline 33 is arranged above the flocculation tank 2. The outlet of the flocculation tank 2 is communicated with the inlet of the air floatation tank 3 through a second conveying pipeline 7. An aeration pipeline is arranged at the bottom of the air floatation tank 3 and is communicated with a gas conveying pipeline 8, and the outlet of the air floatation tank is communicated with the degradation tank 4 through a third conveying pipeline 9. The biological filler 10 is arranged in the degradation tank 4, and the outlet of the degradation tank 4 is connected with the inlet of the ultrafiltration membrane filtering device 1 through a fourth conveying pipeline 11. The outlet of the ultrafiltration membrane filtering device 1 is connected with the inlet of the regulating tank 13 through a fifth conveying pipeline 12, an adjusting material adding pipeline is arranged above the regulating tank 13, the outlet of the regulating tank is connected with the tube pass inlet of the heat exchanger 15 through a sixth conveying pipeline 14, and the tube pass outlet of the heat exchanger 15 is connected with the liquid inlet of the first-stage reverse osmosis unit 17 through a seventh conveying pipeline 16. The clear liquid outlet of the first-stage reverse osmosis unit 17 is connected with the liquid inlet of the second-stage reverse osmosis unit 19 through an eighth conveying pipeline 18, and high-flux reverse osmosis membranes are arranged in the first-stage reverse osmosis unit 17 and the second-stage reverse osmosis unit 19.
The utility model combines the sewage pretreatment system and the membrane filtration system, can convert sewage into desalted water which is convenient for industrial application, thereby utilizing a large amount of wastewater resources, and has obvious resource and environmental protection benefits.
As a further design of the utility model, the clear liquid outlet of the secondary reverse osmosis unit 19 is connected with the inlet of the ion exchange resin treatment unit 21 through a ninth conveying pipeline 20, the outlet of the ion exchange resin treatment unit 21 is connected with the inlet of the purification unit 23 through a tenth conveying pipeline 22, and the outlet of the purification unit 23 is connected with the pure water tank 24. The ion exchange resin treatment unit 21 employs sodium ion exchange resin. The purification unit 23 employs an ozone sterilization device or an ultraviolet sterilization device.
The utility model further combines the reverse osmosis membrane technology and the ion exchange technology, and uses the early-stage ultrafiltration membrane filtration and the two-stage reverse osmosis unit as the pretreatment technology before the ion exchange resin treatment, thereby not only ensuring the stable quality of the effluent water and prolonging the service life of the resin, but also being more environment-friendly. Then the ultrapure water is sterilized by an ozone sterilization device or an ultraviolet sterilization device, and the clean ultrapure water can be obtained.
Furthermore, a partition wall is arranged in the sewage tank 6, the partition wall divides the sewage tank into a sewage storage area and a sewage pre-filtering area, a felt is arranged above the sewage pre-filtering area, a screen mesh for filtering solid waste is arranged at an outlet of the sewage pre-filtering area, and an outlet of the sewage pre-filtering area is connected with the first conveying pipeline 5. Through the separated sewage pre-filtering area, oil stains in the sewage can be adsorbed and removed by using a degreasing felt, and solid particles of waste residues in the sewage can be removed.
Further, the degradation tank 4 is divided into an anaerobic degradation tank 401 and an aerobic degradation tank 402 which are communicated with each other, a plurality of partition plates 403 are arranged in the anaerobic degradation tank and the aerobic degradation tank, and the adjacent partition plates are arranged in a parallel staggered manner. Through the arrangement mode of the partition plates, water flow passing through the anaerobic degradation tank and the aerobic degradation tank can move in an S shape and pass through the filler, so that good anaerobic and aerobic treatment effects are achieved, and organic matters and the like in water are effectively removed.
The ultrafiltration membrane filtering device is used for filtering particles with the molecular weight more than 500 and the particle diameter more than 10 nm.
The adjusting body adding pipeline comprises a reducing agent adding pipeline 34, a scale inhibitor adding pipeline 35 and an acid solution adding pipeline 36, and is respectively used for adding a reducing agent for neutralization to the adjusting tank when needed, a scale inhibitor for preventing scale formation in the reverse osmosis membrane treatment in the later period and an acid solution for adjusting the pH value in the adjusting tank.
Furthermore, the concentrated solution outlet of the secondary reverse osmosis unit is communicated with the solution inlet of the primary reverse osmosis unit 17 through an eleventh delivery pipeline 25. The first-stage reverse osmosis unit is also provided with a concentrated solution outlet. This structure setting mode can carry out the concentrated processing with liquid, effectively avoids the waste of water resource.
Further, the reverse osmosis membrane system is further connected with a backwashing device, which includes a backwashing water pipe line including a first backwashing water input pipe line 26, a first backwashing water discharge pipe line 27, a second backwashing water input pipe line 28, and a second backwashing water discharge pipe line 29, and a filter 30. The first backwashing water input pipeline 26 is communicated with a reverse osmosis water inlet of the second-stage reverse osmosis unit 19, a reverse osmosis water outlet of the second-stage reverse osmosis unit 19 is connected with one end of a first backwashing water discharge pipeline 27, the other end of the first backwashing water discharge pipeline 27 is connected with a water inlet of a filter 30, a water outlet of the filter 30 is connected with one end of a second backwashing water input pipeline 28, the other end of the second backwashing water input pipeline 28 is connected with a reverse osmosis water inlet of the first-stage reverse osmosis unit 17, and a reverse osmosis water outlet of the first-stage reverse osmosis unit is connected with a second backwashing water discharge pipeline 29. The two-stage reverse osmosis unit is connected with the back washing device in a matched mode, so that the desalination rate is further improved, the performance of the high-flux reverse osmosis membrane is guaranteed to be maintained through periodical back washing, and the service life is prolonged.
Further, the first backwashing water input pipeline is also connected with a sodium hypochlorite solution adding pipeline 31, and a sodium hypochlorite solution can be added into the backwashing water to inhibit bacteria breeding in the membrane module.
Furthermore, the ninth pipeline 20 is connected to an ammonia-containing solution adding pipeline 32, and ammonia can be added as required to remove CO in the water2And other acidic materials.
The operation process of the utility model is roughly as follows:
waste water in the sewage tank is subjected to oil removal and slag removal through the sewage pre-filtering area, then enters the flocculation tank, is subjected to flocculation and precipitation through adding a flocculating agent, and can further remove fine particles in the water. The water after flocculation and precipitation in the flocculation tank enters the air floatation tank, and uniform aeration is carried out in the air floatation tank, so that more tiny particles can be conveniently removed on one hand, and the subsequent degradation treatment is facilitated on the other hand. The water treated by the air floatation tank enters a degradation tank, passes through a filler in an S-shaped trend in the degradation tank, and is subjected to anaerobic treatment and aerobic treatment in sequence, so that the pretreatment of the wastewater is completed. Through the pretreatment of the wastewater, the components such as particles, organic matters and the like in the wastewater can be effectively removed.
Then the water enters an ultrafiltration membrane filtering device, particles with the molecular weight larger than 500 and the particle diameter larger than 10nm are filtered by the ultrafiltration membrane filtering device, the water filtered by the ultrafiltration membrane filtering device enters an adjusting tank, and the water component, the pH value and the like in the adjusting tank can be adjusted by adding a reducing agent, a scale inhibitor, an acid solution and the like into the adjusting tank. If the reducing agent is added, the oxidizing substances in the water can be neutralized, and the added scale inhibitor can disperse the insoluble inorganic salt in the water, so that the precipitation and scaling functions of the insoluble inorganic salt on the metal surface are prevented or interfered. The raw water adjusted by the adjusting tank enters a reverse osmosis system after being subjected to heat exchange and temperature rise by a heat exchanger. And filtering the wastewater by high-flux reverse osmosis membranes of the first-stage reverse osmosis unit and the second-stage reverse osmosis unit in sequence to obtain desalted water. The desalted water can be directly used in factories. The water can also further enter an ion exchange resin processing unit to perform sufficient ion exchange with sodium ion exchange resin, and then enter a purification unit to be sterilized, disinfected and purified by an ozone sterilization device or an ultraviolet sterilization device, so that a purer water source is obtained, and the application is wider.
Parts not described in the above modes can be realized by adopting or referring to the prior art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an adopt effluent treatment plant of membrane structure which characterized in that: the sewage pretreatment system, the ultrafiltration membrane filtering device and the reverse osmosis membrane filtering device are sequentially connected;
the sewage pretreatment system comprises a flocculation tank, an air flotation tank and a degradation tank, wherein an inlet of the flocculation tank is communicated with the sewage tank through a first conveying pipeline, a flocculating agent adding pipeline is arranged above the flocculation tank, and an outlet of the flocculation tank is communicated with an inlet of the air flotation tank through a second conveying pipeline; an aeration pipeline is arranged at the bottom of the air floatation tank and is communicated with a gas conveying pipeline, and an outlet of the air floatation tank is communicated with the degradation tank through a third conveying pipeline; the biological filler is arranged in the degradation tank, and the outlet of the degradation tank is connected with the inlet of the ultrafiltration membrane filtering device through a fourth conveying pipeline;
the export of milipore filter equipment passes through the import of fifth pipeline connection equalizing basin, it adds the pipeline to be provided with the adjusting material in the top of equalizing basin, the export of equalizing basin passes through the tube side access connection of sixth pipeline and heat exchanger, the tube side export of heat exchanger passes through the inlet of seventh pipeline connection one-level reverse osmosis unit, the clear liquid export of one-level reverse osmosis unit is connected with the inlet of second grade reverse osmosis unit through eighth pipeline, all be provided with high flux reverse osmosis membrane in one-level reverse osmosis unit and second grade reverse osmosis unit.
2. The apparatus for treating wastewater using membrane structure according to claim 1, wherein: the clear liquid outlet of the second-stage reverse osmosis unit is connected with the inlet of the ion exchange resin treatment unit through a ninth conveying pipeline, the outlet of the ion exchange resin treatment unit is connected with the inlet of the purification unit through a tenth conveying pipeline, and the outlet of the purification unit is connected with the pure water tank.
3. The apparatus for treating wastewater using membrane structure according to claim 1, wherein: the sewage tank is characterized in that a partition wall is arranged in the sewage tank, the partition wall divides the sewage tank into a sewage storage area and a sewage pre-filtering area, a felt removing device is arranged above the sewage pre-filtering area, a screen used for filtering solid waste residues is arranged at an outlet of the sewage pre-filtering area, and an outlet of the sewage pre-filtering area is connected with a first conveying pipeline.
4. The apparatus for treating wastewater using membrane structure according to claim 1, wherein: the degradation pond is separated for anaerobic degradation pond and the aerobic degradation pond of intercommunication each other, all is provided with a plurality of baffles in the inside in anaerobic degradation pond and aerobic degradation pond, and adjacent baffle is parallel dislocation arrangement.
5. The apparatus for treating wastewater using membrane structure according to claim 1, wherein: the ultrafiltration membrane filtering device is a membrane filtering device for filtering particles with the molecular weight more than 500 and the particle diameter more than 10 nm.
6. The apparatus for treating wastewater using membrane structure according to claim 1, wherein: the adjusting material adding pipeline comprises a reducing agent adding pipeline, a scale inhibitor adding pipeline and an acid solution adding pipeline.
7. The apparatus for treating wastewater using membrane structure according to claim 1, wherein: and a concentrated solution outlet of the second-stage reverse osmosis unit is communicated with a liquid inlet of the first-stage reverse osmosis unit through an eleventh conveying pipeline.
8. The apparatus for treating wastewater using membrane structure according to claim 1, wherein: the reverse osmosis membrane system is also connected with a back washing device, the back washing device comprises a back washing water pipeline and a filter, and the back washing water pipeline comprises a first back washing water input pipeline, a first back washing water discharge pipeline, a second back washing water input pipeline and a second back washing water discharge pipeline;
the reverse osmosis water inlet of first backwash water input pipeline and second grade reverse osmosis unit is linked together, and the reverse osmosis delivery port of second grade reverse osmosis unit is connected with the one end of first backwash water discharge pipeline, and the water inlet of filter is connected to the other end of first backwash water discharge pipeline, and the delivery port of filter is connected with the one end of second backwash water input pipeline, and the reverse osmosis water inlet of one-level reverse osmosis unit is connected to the other end of second backwash water input pipeline, and second backwash water discharge pipeline is connected to the reverse osmosis delivery port of one-level reverse osmosis unit.
9. The apparatus for treating wastewater using membrane structure according to claim 2, wherein: the ion exchange resin treatment unit adopts sodium ion exchange resin.
10. The apparatus for treating wastewater using membrane structure according to claim 2, wherein: the purification unit adopts an ozone sterilization device or an ultraviolet sterilization device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122586885.6U CN215975452U (en) | 2021-10-26 | 2021-10-26 | Wastewater treatment device adopting membrane structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122586885.6U CN215975452U (en) | 2021-10-26 | 2021-10-26 | Wastewater treatment device adopting membrane structure |
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| CN215975452U true CN215975452U (en) | 2022-03-08 |
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| CN202122586885.6U Active CN215975452U (en) | 2021-10-26 | 2021-10-26 | Wastewater treatment device adopting membrane structure |
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