CN214457217U - High-salinity wastewater zero-discharge treatment system - Google Patents
High-salinity wastewater zero-discharge treatment system Download PDFInfo
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- CN214457217U CN214457217U CN202023276585.XU CN202023276585U CN214457217U CN 214457217 U CN214457217 U CN 214457217U CN 202023276585 U CN202023276585 U CN 202023276585U CN 214457217 U CN214457217 U CN 214457217U
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- 239000002351 wastewater Substances 0.000 title claims abstract description 54
- 208000028659 discharge Diseases 0.000 title claims description 13
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- 150000003839 salts Chemical class 0.000 claims abstract description 46
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 238000000926 separation method Methods 0.000 claims abstract description 23
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 238000001179 sorption measurement Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 238000001223 reverse osmosis Methods 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 229920001429 chelating resin Polymers 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000012466 permeate Substances 0.000 claims description 6
- 239000000701 coagulant Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229910021645 metal ion Inorganic materials 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 229910001425 magnesium ion Inorganic materials 0.000 abstract description 8
- 239000005416 organic matter Substances 0.000 abstract description 7
- 238000002425 crystallisation Methods 0.000 abstract description 6
- 230000008025 crystallization Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 abstract description 3
- 239000013505 freshwater Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
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- 239000011575 calcium Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 229910001424 calcium ion Inorganic materials 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000009287 sand filtration Methods 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model provides a high salt waste water zero release processing system belongs to waste water treatment technical field, include: softening reaction tank, organic tubular nanofiltration membrane, adsorption unit, nanofiltration unit and membrane concentration unit. The utility model provides a pair of high salt waste water zero release processing system carries out two grades of salt through jointly using organic tubular nanofiltration membrane and receive the membrane system, can effectively improve and divide salt efficiency, realizes the high-efficient separation of monovalent salt and divalent salt, has improved the operating efficiency of membrane element. The utility model discloses a cooperation is used the absorption unit to adsorb on the basis of organic tubular nanofiltration membrane, can high-efficiently get rid of the calcium magnesium ion and the organic matter pollution of aquatic, reduces the scale deposit and the pollution risk of follow-up film element, has improved the life of film element, has reduced the content of aquatic organic matter, has guaranteed the purity of crystallization product. Through the optimized system, the desalted fresh water is reused in a factory, and zero discharge and resource recycling production and utilization are achieved comprehensively.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, concretely relates to high salt waste water zero release processing system.
Background
With the rapid development of the urbanization and the industrialization in China, the problem of treating and discharging domestic waste and industrial waste water is increasingly prominent, and the sustainable development and the green development are concerned by the whole society. With the rapid development of industries such as petrifaction, electric power, metallurgy, coal chemical industry and the like, the amount of sewage containing complex components such as reverse osmosis concentrated water, industrial sewage, circulating sewage, partial process drainage and the like generated in the industrial production process is increased year by year, and the sewage discharge becomes an ecological problem to be solved urgently.
The problem that membrane elements are easily scaled in the subsequent membrane concentration and separation process due to overhigh hardness of inlet water exists in the field of high-salinity wastewater treatment at present. The existing softening process mainly removes suspended matters, colloid and silt in water through sand filtration after adding a softening agent. However, because sand filtration is inconvenient to clean and the performance is unstable, if the cleaning is not timely, the subsequent problem of membrane element pollution and scaling still occurs. Therefore, a new softening treatment process is urgently needed to ensure the stability of the water quality of the subsequent produced water, reduce the scaling risk of the subsequent membrane element and prolong the service life of the membrane element.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high salt waste water zero release processing system aims at solving the high salt waste water treatment in-process and produces water quality of water unstable, the problem of the membrane element scale deposit appears in the concentrated separation process of subsequent membrane easily.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a high salt waste water zero release processing system, includes the softening reaction pond, organic tubular nanofiltration membrane, adsorption unit, nanofiltration unit and the concentrated unit of membrane that connect gradually with the help of the pipeline:
the softening reaction tank is provided with a feed inlet for adding a descaling agent, a silicon removing agent and/or a coagulant and a liquid inlet communicated with the wastewater to be treated; the adsorption unit is filled with chelating resin and/or active carbon and is used for removing metal ions and organic matters in the wastewater; the nanofiltration unit is used for carrying out secondary salt separation on the wastewater, and comprises a nanofiltration device and a first evaporator, wherein the wastewater penetrating through the nanofiltration device is discharged into the membrane concentration unit, and the salt concentrated solution not penetrating through the nanofiltration device enters the first evaporator; the membrane concentration unit comprises a reverse osmosis device and a second evaporator, water permeating through the reverse osmosis device enters a plant area water replenishing pool or a water replenishing pipeline, and concentrated solution intercepted by the reverse osmosis device enters the second evaporator.
In one embodiment, the aperture of the organic tubular nanofiltration membrane is selected to be 1-2 nm.
In one embodiment, the concentrated solution which does not permeate through the organic tubular nanofiltration membrane is communicated with the liquid inlet of the softening reaction tank through a pipeline.
In one embodiment, the adsorption unit adopts an absorption tower, and the chelating resin and/or the activated carbon are filled in the absorption tower.
In one embodiment, the absorption tower is filled with a mixture of chelating resin and activated carbon.
In one embodiment, a stirring device is arranged in the softening reaction tank.
In one embodiment, the aperture of the reverse osmosis membrane of the reverse osmosis device is 0.1-1 nm.
In one embodiment, a wastewater buffer tank is arranged before the softening reaction tank and used for collecting and storing high-salinity wastewater to be treated.
The utility model provides a pair of high salt waste water zero release processing system's beneficial effect lies in: compared with the prior art, the organic tubular nanofiltration membrane replaces the original sand filtration device and is matched with the nanofiltration unit for use, on one hand, the problem of effluent water quality stability is solved by utilizing the characteristics of large flux, pollution resistance and cleaning resistance of the organic tubular nanofiltration membrane, the scaling risk of a subsequent membrane element is reduced, and the service life of the membrane element is prolonged; on the other hand, devices such as ultrafiltration and primary nanofiltration are omitted, equipment investment and process complexity are reduced, on the other hand, salt in the high-salinity wastewater passes through a primary salt separation of the organic tubular nanofiltration membrane and a secondary salt separation of the nanofiltration unit, salt separation efficiency can be effectively improved, the average retention rate of divalent salt is 98.5%, high-efficiency separation of monovalent salt and divalent salt is realized, and operation efficiency of the membrane element is improved. Namely the utility model discloses a cooperation is used the absorption unit to adsorb on the basis of organic tubular nanofiltration membrane, can high-efficiently get rid of the calcium magnesium ion and the organic matter pollution of aquatic, reduces the scale deposit and the pollution risk of follow-up film element, has improved the life of film element, has reduced the content of aquatic organic matter, has guaranteed the purity of the crystallization product in first evaporimeter and the second evaporimeter. Through the optimized system, the desalted fresh water is reused in a factory, and zero discharge and resource recycling production and utilization are achieved comprehensively.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of a connection structure of a high-salinity wastewater zero-discharge treatment system provided by an embodiment of the utility model.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a high-salinity wastewater zero-discharge treatment system provided by the present invention will now be described. A high-salinity wastewater zero-discharge treatment system comprises a softening reaction tank, an organic tubular nanofiltration membrane, an adsorption unit, a nanofiltration unit and a membrane concentration unit which are sequentially connected by means of pipelines.
The softening reaction tank is provided with a feeding port for adding a descaling agent, a silicon removing agent and/or a coagulant and a liquid inlet communicated with the wastewater to be treated. The wastewater to be treated enters a softening reaction tank, and a scale remover, such as acetic acid and the like, is added according to the property of the wastewater and is used for removing Ca and Mg ions in the water; silica removers, such as sodium metaaluminate; for better flocculation, a flocculant may also be added, such as a PAV flocculant (the main chemical component is polyacrylamide). The organic tubular nanofiltration membrane is used for separating mud and water. The adsorption unit is filled with chelating resin and/or activated carbon and is used for removing metal ions and organic matters in the wastewater. The nanofiltration unit is used for carrying out secondary salt separation on the wastewater, the nanofiltration unit comprises a nanofiltration device and a first evaporator, wherein monovalent salt permeates the nanofiltration device, along with the discharge of the wastewater into the membrane concentration unit, divalent salt does not permeate the nanofiltration device and enters the first evaporator as a salt concentrated solution, and the main product of the first evaporator is Na2SO4. The membrane concentration unit comprises a reverse osmosis device and a second evaporator, water penetrating through the reverse osmosis device enters a plant water replenishing pool or a water replenishing pipeline, concentrated solution intercepted by the reverse osmosis device enters the second evaporator, and a main product in the second evaporator is sodium chloride.
According to the technical scheme, high-salinity wastewater firstly enters a softening reaction tank through a liquid inlet, calcium, magnesium, silicon and part of suspended solids in the water are converted into precipitates by adding drugs at a feeding port, then mud-water separation and primary salt separation are carried out on the wastewater through an organic tubular nanofiltration membrane, the wastewater penetrating through the organic tubular nanofiltration membrane enters an adsorption unit to further remove calcium and magnesium ions and organic matters in the wastewater, then secondary salt separation is carried out through a nanofiltration unit to improve the salt separation effect and improve the salt purity, the wastewater penetrating through the nanofiltration device is discharged into a membrane concentration unit, salt concentrate not penetrating through the nanofiltration device enters a first evaporator, wherein the first evaporator evaporates and crystallizes salt, and the sodium sulfate purity reaches more than 95%; and the water penetrating through the reverse osmosis device enters a plant water replenishing pool or a water replenishing pipeline to realize zero emission, the concentrated solution intercepted by the reverse osmosis device enters a second evaporator, and the purity of sodium chloride in the evaporated and crystallized salt is improved to 98.5%.
Compared with the prior art, the method has the advantages of simple treatment process, small system floor area, low operating cost and stable water outlet. The average retention rate of the divalent salt is 98.5 percent, and the high-efficiency separation of the monovalent salt and the divalent salt is realized; salt in the high-salinity wastewater passes through the organic tubular nanofiltration membrane first-stage salt separation unit and then passes through the nanofiltration unit second-stage salt separation unit, so that the salt separation efficiency can be effectively improved, and the operation efficiency of the membrane element is improved. And through the cooperation of using the absorption unit to adsorb on the basis of organic tubular nanofiltration membrane, can get rid of the calcium magnesium ion in water and organic matter pollution with high efficiency, reduce the scale deposit and the pollution risk of follow-up film element, improved the life of film element, reduced the content of organic matter in the water, guaranteed the purity of crystallization product. Through the optimized system, the desalted fresh water is reused in a factory, and zero discharge and resource recycling production and utilization are achieved comprehensively.
In this embodiment, the pore diameter of the organic tubular nanofiltration membrane is selected to be 1-2 nm. The organic tubular nanofiltration membrane replaces the original sand filtration device, so that on one hand, the defects of sand filtration in the prior art are overcome, the problem of effluent quality stability is solved by utilizing the characteristics of large flux, pollution resistance and washing resistance of the organic tubular nanofiltration membrane, the scaling risk of a subsequent membrane element is reduced, and the service life of the membrane element is prolonged; on the other hand, the characteristic that the organic tubular nanofiltration membrane has good interception effect on divalent ions is utilized, devices such as ultrafiltration and primary nanofiltration are omitted in the process, the equipment investment and the process complexity are reduced, the salt separation effect is obviously improved, and the operation efficiency of the membrane element is improved.
In order to comprehensively achieve zero emission and recycling production utilization, the concentrated solution which does not penetrate through the organic tubular nanofiltration membrane flows back to the liquid inlet of the softening reaction tank. The aperture of the organic tubular nanofiltration membrane is 1-2 nm, water which does not penetrate through the organic tubular nanofiltration membrane and silt flow back to the liquid inlet of the softening reaction tank together, wastewater which does not fully react can react with the medicine again to generate precipitate, and the silt and the precipitate are discharged by the softening reaction tank regularly.
In order to efficiently remove calcium and magnesium ions and organic pollution in water, the adsorption unit adopts an absorption tower, and chelate resin and/or active carbon are filled in the absorption tower.
In one embodiment, the absorption tower is preferably filled with a mixture of chelating resin and activated carbon, or a mixture of chelating resin and coconut shell activated carbon adsorption balls as adsorption resin. According to the content of organic matters in inlet water, the adsorption effect on different pollutants is enhanced through reasonable addition of the filler, so that the wastewater is better softened and the organic matters are removed. By using the adsorption unit to adsorb the wastewater, the calcium and magnesium ions and organic pollution in the water can be efficiently removed, the scaling and pollution risks of subsequent membrane elements are reduced, the service life of the membrane elements is prolonged, the content of the organic matters in the water is reduced, and the purity of a crystallization product is ensured.
In order to promote the dissolution and the rapid reaction of the softening medicament and the silicon removing medicament, a stirring device is arranged in the softening reaction tank. According to the speed of the sedimentation or flocculation reaction, the stirring intensity is adjusted to provide proper hydraulic conditions, thereby achieving the optimal sedimentation or flocculation effect.
The aperture of the reverse osmosis membrane of the reverse osmosis device can be selected to be 0.1-1 nm. The reverse osmosis apparatus can effectively remove charged ions, inorganic substances, colloidal particles, bacteria, organic substances and the like in water, and brine which does not permeate the reverse osmosis membrane is further concentrated. The recovery rate of the reverse osmosis device can reach 75 percent.
In order to buffer the wastewater flow for subsequent treatment, a wastewater buffer tank is arranged in front of the softening reaction tank and used for collecting and storing high-salinity wastewater to be treated.
As a preferred embodiment, the specific process flow is as follows:
the high-salinity wastewater is firstly lifted to a wastewater buffer tank by a raw water pump, enters a softening reaction tank through a liquid inlet, is firstly added with a softening medicament and a silicon removing medicament at a feed inlet, and is added with a coagulant and a flocculant after full reaction. Adding medicine to convert calcium, magnesium, silicon and partial solid suspended matters in water into sediment, then carrying out mud-water separation and first-stage salt separation on the wastewater through the organic tubular nanofiltration membrane, and passing through the produced water of the organic tubular nanofiltration membrane, wherein the solid suspended matters are less than or equal to 0.5NTU, the total hardness is less than or equal to 50mg/L, the sludge density index is less than or equal to 4, the silicon is less than or equal to 1mg/L, the sulfate ion rejection rate (%) is more than or equal to 80, the water which does not pass through the organic tubular nanofiltration membrane and silt flow back to the softening reaction tank through a liquid inlet, the wastewater which does not fully react with the medicine again to generate sediment, and the silt and the sediment are discharged from the softening reaction tank periodically.
The wastewater penetrating through the organic tubular nanofiltration membrane enters an absorption tower to further remove calcium and magnesium ions and organic matters, and the absorption tower produces water: the total hardness is less than or equal to 0.1mg/L, and the organic matter is less than or equal to 25 mg/L. The water produced by the absorption tower is subjected to secondary salt separation through the nanofiltration device, the salt separation effect is improved, the salt purity is improved, the water produced by the nanofiltration device enters the reverse osmosis device for concentration, the concentrated water which does not pass through the nanofiltration device enters the first evaporator for crystallization treatment, and the concentrated water of the nanofiltration unit is evaporated and crystallized through the first evaporator, so that the water content of sodium sulfate is less than or equal to 0.50%. The nanofiltration device can improve the purity of the sodium sulfate in the concentrated water which does not penetrate through the nanofiltration unit to 95 percent. And discharging the water filtered by the reverse osmosis device into a membrane concentration water producing tank, wherein the water in the membrane concentration water producing tank is used for supplying water to a plant area, the concentrated water which does not permeate through the reverse osmosis device enters a second evaporator for crystallization, and the water content of the sodium chloride is less than or equal to 0.20 percent after the membrane concentration concentrated water is evaporated and crystallized by the second evaporator.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a high salt waste water zero release processing system which characterized in that includes and receives filter membrane, absorption unit, receive filter unit and the concentrated unit of membrane with the help of softening reaction tank, organic tubular that the pipeline connects gradually:
the softening reaction tank is provided with a feeding port for adding a descaling agent, a silicon removing agent or a coagulant and a liquid inlet communicated with the wastewater to be treated;
the adsorption unit is filled with chelating resin or activated carbon and is used for removing metal ions and organic matters in the wastewater;
the nanofiltration unit is used for carrying out secondary salt separation on the wastewater, and comprises a nanofiltration device and a first evaporator, wherein the wastewater penetrating through the nanofiltration device is discharged into the membrane concentration unit, and the salt concentrated solution not penetrating through the nanofiltration device enters the first evaporator;
the membrane concentration unit comprises a reverse osmosis device and a second evaporator, water permeating through the reverse osmosis device enters a plant area water replenishing pool or a water replenishing pipeline, and concentrated solution intercepted by the reverse osmosis device enters the second evaporator.
2. The high-salinity wastewater zero-emission treatment system of claim 1, wherein the pore size of the organic tubular nanofiltration membrane is 1-2 nm.
3. The high-salinity wastewater zero-emission treatment system of claim 1, wherein the concentrated solution which does not permeate through the organic tubular nanofiltration membrane is communicated with the liquid inlet of the softening reaction tank through a pipeline.
4. The high-salinity wastewater zero-discharge treatment system according to claim 1, wherein the adsorption unit adopts an absorption tower.
5. The high-salinity wastewater zero-discharge treatment system according to claim 1, wherein a stirring device is arranged in the softening reaction tank.
6. The high-salinity wastewater zero-discharge treatment system according to claim 1, wherein the reverse osmosis membrane of the reverse osmosis device has a pore diameter of 0.1-1 nm.
7. The high-salinity wastewater zero-discharge treatment system according to claim 1, characterized in that a wastewater buffer tank is arranged before the softening reaction tank and used for collecting and storing the high-salinity wastewater to be treated.
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| CN202023276585.XU CN214457217U (en) | 2020-12-29 | 2020-12-29 | High-salinity wastewater zero-discharge treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116119792A (en) * | 2022-12-26 | 2023-05-16 | 江苏鑫林环保设备有限公司 | Hard removing method and device for mixed salt of coking wastewater evaporation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116119792A (en) * | 2022-12-26 | 2023-05-16 | 江苏鑫林环保设备有限公司 | Hard removing method and device for mixed salt of coking wastewater evaporation system |
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