CN206799345U - A kind of system of high-salt wastewater purified salt - Google Patents
A kind of system of high-salt wastewater purified salt Download PDFInfo
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- CN206799345U CN206799345U CN201720323353.4U CN201720323353U CN206799345U CN 206799345 U CN206799345 U CN 206799345U CN 201720323353 U CN201720323353 U CN 201720323353U CN 206799345 U CN206799345 U CN 206799345U
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- 150000003839 salts Chemical class 0.000 title claims abstract description 84
- 239000002351 wastewater Substances 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000001728 nano-filtration Methods 0.000 claims abstract description 70
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 23
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 23
- 238000002425 crystallisation Methods 0.000 claims abstract description 16
- 230000008025 crystallization Effects 0.000 claims abstract description 16
- 239000011780 sodium chloride Substances 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000000909 electrodialysis Methods 0.000 claims description 43
- 238000001223 reverse osmosis Methods 0.000 claims description 42
- 238000001704 evaporation Methods 0.000 claims description 16
- 230000008014 freezing Effects 0.000 claims description 16
- 238000007710 freezing Methods 0.000 claims description 16
- 230000008020 evaporation Effects 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 150000001450 anions Chemical class 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 10
- 239000013505 freshwater Substances 0.000 claims description 9
- 238000001764 infiltration Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000007865 diluting Methods 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract description 6
- 235000011152 sodium sulphate Nutrition 0.000 abstract description 6
- 238000009941 weaving Methods 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012452 mother liquor Substances 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- PALNZFJYSCMLBK-UHFFFAOYSA-K magnesium;potassium;trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-].[Cl-].[K+] PALNZFJYSCMLBK-UHFFFAOYSA-K 0.000 description 2
- 239000010446 mirabilite Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 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
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model belongs to technical field of industrial sewage treatment in weaving Thermal Power Generation Industry, more particularly, to a kind of system of high-salt wastewater purified salt.System provided by the utility model is by denitration nanofiltration separation and is concentrated into concentration of the sodium sulphate more than 16%, it is then sent to Freeze crystallization, the saltcake that purity is more than 95% is obtained, its yield reaches more than 80%, can reach more than 95% for the relatively low Water Sproading rate of COD contents；Pass through the purification of multistage nanofiltration, further retain sodium sulphate so that the purity of sodium chloride can reach more than more than 95%, and the impurity such as nitrate anion are removed by evaporative crystallization, the reuse value of refined sodium chloride can be further lifted, the overall recovery of sodium chloride can be accomplished to be more than more than 80%.
Description
Technical field
The utility model belongs to technical field of industrial sewage treatment in weaving Thermal Power Generation Industry, is given up more particularly, to a kind of high salt
The system of crystal's salt manufacturing.
Background technology
With industrial expansion, water resource it is in short supply, weaving, the pollution of thermoelectricity and chemical industry are on the rise, logical at present
Cross after being recycled to 75% embrane method of raw water, the concentrated water left is post-processed into current knotty problem, even if by COD etc.
Index, which is costly handled, reaches qualified discharge requirement, but haline water discharge is still made to field irrigation and ecological environment of soil etc.
Into having a strong impact on, so how the salt resource in high-salt wastewater extracts reuse as one of focus of current wastewater treatment.
High-salt wastewater in textile industry derives from the auxiliary agent of fixation, and saltcake or glauber salt and refined salt are wanted to reuse salt
Ask comparison high, separate both main salt in waste water, concentration is refined to reuse requirement, and it could be enterprise to control low reuse cost
Economic benefit is brought, the post processing for developing reverse osmosis concentrated water effectively solves the problems, such as that high-salt wastewater recycling reuse not only reduces carnallite
Solid waste discharge amount, moreover it is possible to solve Xinjiang etc. remote districts auxiliary agent cost of transportation.
At present, the integrated processing high-salt wastewater of film realizes that the technology of emission reduction has also had some similar patents, due to dividing salt
Purity is inadequate, and the integrated salinity of film is relatively low to cause total system energy consumption higher, and can not popularization and application.
The content of the invention
The purpose of this utility model is, for the deficiencies in the prior art, there is provided a kind of high-salt wastewater purified salt
System.
Therefore, above-mentioned purpose of the present utility model is achieved through the following technical solutions：
A kind of system of high-salt wastewater purified salt, the system include：
- pretreatment system, the pretreatment system are used to pre-process high-salt wastewater, and by pretreated
Waste water meets to enter the water quality requirement that one-level nanofiltration divides salt system；
The nanofiltration of-one-level divides salt system, and the one-level nanofiltration point salt system is used to divide at salt pretreatment system progress nanofiltration
Reason, concentrated water enter the progress nanofiltration of high pressure nanofiltration point salt system and divide salt treatment, and production water is carried out at concentration into first-stage reverse osmosis system
Reason；
The nanofiltration of-high pressure divides salt system, and the high pressure nanofiltration point salt system is used to enter the concentrated water of one-level nanofiltration point salt system
Nanofiltration divides salt treatment to row again, and high pressure nanofiltration divides the concentrated water of salt system to enter freezing and crystallizing system progress freezing and crystallizing, and production water enters
Enter first-stage reverse osmosis system and carry out concentration；
- first-stage reverse osmosis system, the first-stage reverse osmosis system are used to divide one-level nanofiltration salt system and high pressure nanofiltration point
The production water that salt system respectively obtains carries out reverse osmosis concentration processing, and the concentrated water of first-stage reverse osmosis system divides salt system into two level nanofiltration
System carries out nanofiltration and divides salt treatment；
The nanofiltration of-two level divides salt system, and the two level nanofiltration divides salt system to be used for the concentrated water progress to first-stage reverse osmosis system
Nanofiltration divides salt treatment again, and two level nanofiltration divides the concentrated water of salt system to enter the diluting compartment of anion detachable film electrodialysis system,
Produce water and enter two-stage reverse osmosis system progress reverse osmosis concentration processing；
- two-stage reverse osmosis system, the two-stage reverse osmosis system are used to divide two level nanofiltration the production water of salt system to carry out instead
Osmosis concentration processing, the part concentrated water of two-stage reverse osmosis system enter the enriched chamber of anion detachable film electrodialysis system；
- anion detachable film electrodialysis system, it is passed through in the diluting compartment of the anion detachable film electrodialysis system
Two level nanofiltration divides the concentrated water of salt system, and the part concentrated water of two-stage reverse osmosis system is passed through in enriched chamber；
- electrodialysis concentration systems, dilute side is passed through the remaining dense of two-stage reverse osmosis system in the electrodialysis concentration systems
Water, concentrated water side are passed through the concentrated water of anion detachable film electrodialysis system, and the concentrated water that electrodialysis concentration systems obtain enters evaporation
Crystal system；
- freezing and crystallizing system, the freezing and crystallizing system divide salt system for Freeze crystallization from high pressure nanofiltration
Concentrated water simultaneously obtains saltcake；And
- evaporation and crystallization system, the evaporation and crystallization system are used for evaporative crystallization processing and obtained from electrodialysis concentration systems
Concentrated water, and by evaporating isolated purer sodium chloride.
While using above-mentioned technical proposal, the utility model can also be used or combined using further below
Technical scheme：
The system also includes bipolar membrane electrodialysis system, and it is anti-to be passed through one-level in the salt room of the bipolar membrane electrodialysis system
The part concentrated water of osmosis system.
The pretreatment system includes：Dosing settling system, filtering oxidative system and softening dealkalize system, to remove color
The impurity such as degree, hardness, basicity and silicon, meet the requirement of salt manufacturing.
The fresh water reuse of the anion detachable film electrodialysis system to the entrance of one-level nanofiltration point salt system is received
Filter divides salt.
The fresh water reuse of the electrodialysis concentration systems to the entrance of two-stage reverse osmosis system carries out reverse osmosis concentration processing.
Most of mother liquor reuse of the freezing and crystallizing system carries out nanofiltration to the entrance of high pressure nanofiltration point salt system and divides salt.
System provided by the utility model is not only suitable for, in the northern area compared with water shortage, also being adapted for environmental emission requirement
The southern area of strict control salinity discharge, especially the weaving garden such as the more flourishing Zhejiang of textile industry, Guangdong, Shandong,
The water of recovery can meet the process water requirement of weaving Thermal Power Generation Industry, not only reclaimed water and also reclaimed the heat carried in waste water
Can, reduce generating and steam cost.Saltcake obtained by point salt and sodium chloride salt is completely available makees textile auxiliary, has saved original
Material cost, solves bottleneck problem existing for high-salt wastewater processing, Ye Wei industry parks or enterprise bring preferably society and
Economic benefit.
System provided by the utility model is by denitration nanofiltration separation and is concentrated into concentration of the sodium sulphate more than 16%, so
After deliver to Freeze crystallization, obtain purity be more than 95% saltcake, its yield reaches more than 80%, relatively low for COD contents
Water Sproading rate can reach more than 95%；By the purification of multistage nanofiltration, sodium sulphate is further retained so that the purity of sodium chloride
It can reach more than more than 95%, the impurity such as nitrate anion are removed by evaporative crystallization, can further lift returning for refined sodium chloride
With value, the overall recovery of sodium chloride can be accomplished to be more than more than 80%.
System provided by the utility model make use of the advantage of each workshop section stage by stage, carry out most rational combination, whole
Individual technique, which has lacked a certain workshop section, can all cause the reduction of reuse effect and the rise of energy consumption, but because system size differs, water
Matter is different, for mini-system, to reduce investment outlay, can reduce energy consumption by the method to strong brine direct reuse, also reduce
Evaporation and the cost of investment of freezing and crystallizing part, producer can need to carry out process combination simplification according to actual reuse, by efficient
The Integrated Films process route of rate realizes the abundant reuse of waste water resource.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the system of high-salt wastewater purified salt provided by the utility model；
In figure：101- dosing settling systems；102- filters oxidative system；103- softens dealkalize system；201- low pressure nanofiltrations
Concentration systems；202- high pressure nanofiltration concentration systems；203- two level nanofiltration systems；301- first-stage reverse osmosis systems；302- two levels are anti-
Osmosis system；303- three-level counter-infiltration systems；401- anion detachable film electrodialysis systems；402- electrodialysis concentration systems；
403- bipolar membrane electrodialysis systems；501- freezing and crystallizing systems；502- evaporation and crystallization systems.
Embodiment
The utility model is described in further detail with specific embodiment referring to the drawings.
A kind of system of high-salt wastewater purified salt, nanofiltration concentration systems concentrate for sodium sulphate, and press the pressure-resistant difference of film,
Divide low pressure nanofiltration concentration systems 201 and high pressure nanofiltration concentration systems 202, low pressure nanofiltration concentration systems 201 have from anion and can divided
The light liquid internal circulating load come is circulated throughout from EDBM system 401, the water inlet of high pressure nanofiltration concentration systems 202 includes freezing and crystallizing
The mother liquor reflux of system 501 and the concentrated water of low pressure nanofiltration concentration systems 201, when system is larger, the nanofiltration that mother liquor can be concentrated again
Concentration systems are separately provided, and are more beneficial for the control of product quality to freezing and crystallizing system.The NF membrane of selection is used to sulphur
The higher denitration film of sour sodium rejection.
The pretreatment system of the system of high-salt wastewater purified salt is dosing settling system 101, filtering oxidative system 102 and soft
Change dealkalize system 103, its purpose is exactly to remove colourity, hardness, basicity, silicon and part organic impurities, meets saltcake and chlorine
Change the requirement of sodium salt, and ensure the safe and stable operation of film combined system.Regeneration salt solution needed for pretreatment can utilize one-level anti-
The part concentrated water of osmosis system 301 or two-stage reverse osmosis system 302, and required acid solution and alkali lye are from bipolar membrane electrodialysis system
403 produce.
Separation to multivalent salts is completed by nanofiltration system, by high pressure nanofiltration separation and is concentrated into sodium sulphate about 16%
Concentration send freezing and crystallizing system 501, wherein being more beneficial for improving the yield of sodium chloride crystal product containing a certain amount of sodium chloride salt.
Suggest that again supporting evaporation drying equipment obtains glauber salt for southern area, be advantageous to deposit.
303 be three-level counter-infiltration system, it will usually determines whether the system needs to add three-level according to the conductance of recycle-water
Counter-infiltration system, as the production water and evaporation condensed water of two-stage reverse osmosis system 302 need to take off again by three-level counter-infiltration system 303 again
Salt, to control recycle-water electric conductivity value to be less than 200 μ s/cm, comply fully with each process point of textile industry with water requirement, total Water circulation
Rate can reach more than more than 95%.
For electrodialysis system, this technique second ion detachable film electrodialysis system 401 and electrodialysis concentration systems 402
Two kinds of concentration process, the fresh water that detachable film electrodialysis system 401 enters is that purifying again for the sulfur-bearing acid sodium-salt through purifying again is de-
Nitre nanofiltration concentrated water, and the concentrated water of detachable film electrodialysis system 401 is a part of concentrated water of two-stage reverse osmosis system 302, when can
When salinity in the fresh water of seperation film electrodialysis system 401 is taken off to low concentration, its fresh water is allowed to be back to low pressure nanofiltration concentration systems
201 water inlet；And the concentrated water side that its concentrated water enters electrodialysis concentration systems 402 further concentrates, electrodialysis concentration systems 402
Fresh water is remaining concentrated water to come from two-stage reverse osmosis system 302, when the fresh water of electrodialysis concentration systems 402 is taken off to 2 ~ 3%,
The water inlet of two-stage reverse osmosis system 302 is returned, and the concentrated water of electrodialysis concentration systems 402 is concentrated into sodium chloride by constantly circulation
Concentration is delivered to evaporation and crystallization system 502 or direct reuse when reaching 18 ~ 20%.Bipolar membrane electrodialysis system 403 is for producing
Pre-process the alkali needed for dosing and the acid needed for regeneration.The salt solution that enters of bipolar membrane electrodialysis system 403 is only needed from one-level reverse osmosis
Appropriate salt solution is separated in reverse osmosis concentrated water after the concentration of permeable system 301, the light salt brine of bipolar membrane electrodialysis system 403 is back to
First-stage reverse osmosis system 301 is concentrated again.
The system of high-salt wastewater purified salt provided by the utility model passes through nanofiltration and the equal combined energy of counter-infiltration system
Recovery process realizes the reclaiming system of low energy consumption.Using the self-priming backwash principle of haline water, block up, reduce clear to reduce the dirt of film
Wash frequency.
, it is necessary to arrange in right amount during the Recycling Mother Solution of freezing and crystallizing system 501 to the impurity level of unmanageable COD and monovalent salt
Put, to ensure the product quality of saltcake and sodium chloride salt, the member of 98% precision can be obtained by evaporating again for southern area saltcake
Bright powder, product are more beneficial for depositing.What evaporation and crystallization system 502 was selected is MVR evaporations, multiple-effect evaporation group technology, except output
Outside can be with the purified salt of reuse, still there is a small amount of carnallite to discharge.
Above-mentioned embodiment is used for illustrating the utility model, preferred embodiment only of the present utility model, and
It is not that the utility model is limited, it is new to this practicality in spirit of the present utility model and scope of the claims
Any modification, equivalent substitution and improvements that type is made etc., both fall within the scope of protection of the utility model.
Claims (6)
1. a kind of system of high-salt wastewater purified salt, it is characterised in that the system includes：
- pretreatment system, the pretreatment system is used to pre-process high-salt wastewater, and expires by pretreated waste water
Foot enters the water quality requirement that one-level nanofiltration divides salt system；
The nanofiltration of-one-level divides salt system, and the one-level nanofiltration point salt system is used to divide salt treatment to pretreatment system progress nanofiltration, dense
Water enters the progress nanofiltration of high pressure nanofiltration point salt system and divides salt treatment, and production water enters first-stage reverse osmosis system and carries out concentration；
The nanofiltration of-high pressure divides salt system, and the high pressure nanofiltration point salt system is used to divide one-level nanofiltration the concentrated water of salt system to carry out again
Secondary nanofiltration divides salt treatment, and high pressure nanofiltration divides the concentrated water of salt system to enter freezing and crystallizing system progress freezing and crystallizing, and production water enters one
Level counter-infiltration system carries out concentration；
- first-stage reverse osmosis system, the first-stage reverse osmosis system are used to divide salt system to one-level nanofiltration point salt system and high pressure nanofiltration
The production water respectively obtained of uniting carries out reverse osmosis concentration processing, and the concentrated water of first-stage reverse osmosis system is entered into two level nanofiltration point salt system
Row nanofiltration divides salt treatment；
The nanofiltration of-two level divides salt system, and the two level nanofiltration divides salt system to be used to carry out again the concentrated water of first-stage reverse osmosis system
Nanofiltration divides salt treatment, and two level nanofiltration divides the concentrated water of salt system to enter the diluting compartment of anion detachable film electrodialysis system, produces water
Reverse osmosis concentration processing is carried out into two-stage reverse osmosis system；
- two-stage reverse osmosis system, the two-stage reverse osmosis system are used to divide two level nanofiltration the production water of salt system to carry out counter-infiltration
Concentration, the part concentrated water of two-stage reverse osmosis system enter the enriched chamber of anion detachable film electrodialysis system；
- anion detachable film electrodialysis system, two level is passed through in the diluting compartment of the anion detachable film electrodialysis system
Nanofiltration divides the concentrated water of salt system, and the part concentrated water of two-stage reverse osmosis system is passed through in enriched chamber；
- electrodialysis concentration systems, dilute side is passed through the remaining concentrated water of two-stage reverse osmosis system in the electrodialysis concentration systems, dense
Water side is passed through the concentrated water of anion detachable film electrodialysis system, and the concentrated water that electrodialysis concentration systems obtain enters evaporative crystallization system
System；
- freezing and crystallizing system, the freezing and crystallizing system are used for the concentrated water that Freeze crystallization divides salt system from high pressure nanofiltration
And obtain saltcake；And
- evaporation and crystallization system, the evaporation and crystallization system obtain dense for evaporative crystallization processing from electrodialysis concentration systems
Water, and by evaporating isolated purer sodium chloride.
2. the system of high-salt wastewater purified salt according to claim 1, it is characterised in that the system also includes Bipolar Membrane
Electrodialysis system, the part concentrated water of first-stage reverse osmosis system is passed through in the salt room of the bipolar membrane electrodialysis system.
3. the system of high-salt wastewater purified salt according to claim 1, it is characterised in that the pretreatment system includes：
Dosing settling system, filtering oxidative system and softening dealkalize system, to remove colourity, hardness, basicity and silicon impurities, meet salt manufacturing
Requirement.
4. the system of high-salt wastewater purified salt according to claim 1, it is characterised in that the anion detachable film electricity
The fresh water reuse of electrodialysis system carries out nanofiltration to the entrance of one-level nanofiltration point salt system and divides salt.
5. the system of high-salt wastewater purified salt according to claim 1, it is characterised in that the electrodialysis concentration systems
Fresh water reuse to the entrance of two-stage reverse osmosis system carries out reverse osmosis concentration processing.
6. the system of high-salt wastewater purified salt according to claim 1, it is characterised in that the freezing and crystallizing system it is big
Partial mother liquid reuse carries out nanofiltration to the entrance of high pressure nanofiltration point salt system and divides salt.
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| CN108658345A (en) * | 2017-03-30 | 2018-10-16 | 杭州水处理技术研究开发中心有限公司 | A kind of method and system of high-salt wastewater purified salt |
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| CN116514348A (en) * | 2023-06-21 | 2023-08-01 | 北京百灵天地环保科技股份有限公司 | High salinity wastewater treatment process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108658345A (en) * | 2017-03-30 | 2018-10-16 | 杭州水处理技术研究开发中心有限公司 | A kind of method and system of high-salt wastewater purified salt |
| CN108658345B (en) * | 2017-03-30 | 2024-01-02 | 杭州水处理技术研究开发中心有限公司 | Method and system for refining salt from high-salt wastewater |
| CN108275817A (en) * | 2018-01-22 | 2018-07-13 | 浙江开创环保科技股份有限公司 | A kind of processing method of the high salinity waste water reclaiming of high rigidity |
| CN108423903A (en) * | 2018-02-27 | 2018-08-21 | 四川美富特水务有限责任公司 | Dyeing waste water zero-discharge treatment system |
| CN110272061A (en) * | 2018-03-14 | 2019-09-24 | 国家能源投资集团有限责任公司 | A kind of salt extraction process |
| CN110272061B (en) * | 2018-03-14 | 2022-03-22 | 国家能源投资集团有限责任公司 | Salt production method |
| CN108529802A (en) * | 2018-04-03 | 2018-09-14 | 山东玉鑫环保科技股份有限公司 | Titanium white production discharges high slat-containing wastewater zero-emission technique |
| CN108529802B (en) * | 2018-04-03 | 2020-10-30 | 山东玉鑫环保科技股份有限公司 | Zero-discharge process for discharging high-salt-content wastewater in titanium dioxide production |
| CN110734178A (en) * | 2018-07-18 | 2020-01-31 | 宝武炭材料科技有限公司 | coking wastewater membrane concentration salt separation zero-discharge treatment system and method |
| CN115321559A (en) * | 2022-08-26 | 2022-11-11 | 山东泉益环保科技有限公司 | Device and method for producing high-concentration sodium sulfate solution by adopting nanofiltration membrane concentration technology |
| CN115321559B (en) * | 2022-08-26 | 2024-04-05 | 山东泉益环保科技有限公司 | Device and method for producing high-concentration sodium sulfate solution by nanofiltration membrane concentration technology |
| CN116514348A (en) * | 2023-06-21 | 2023-08-01 | 北京百灵天地环保科技股份有限公司 | High salinity wastewater treatment process |
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