CN105254105A - Method and system for preparing salt by using strong brine discharged from seawater desalination plant - Google Patents
Method and system for preparing salt by using strong brine discharged from seawater desalination plant Download PDFInfo
- Publication number
- CN105254105A CN105254105A CN201510751255.6A CN201510751255A CN105254105A CN 105254105 A CN105254105 A CN 105254105A CN 201510751255 A CN201510751255 A CN 201510751255A CN 105254105 A CN105254105 A CN 105254105A
- Authority
- CN
- China
- Prior art keywords
- membrane
- strong brine
- desalinator
- salt
- ionic membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a method and a system for preparing a salt by using strong brine discharged from a seawater desalination plant. The method comprises: a process of decarbonization, namely performing decarbonization on the strong brine discharged by the seawater desalination plant to obtain decarbonized concentrated water; a process of ionic membrane concentration, namely concentrating the decarbonized concentrated water by adopting an ionic membrane to obtain ED strong brine and ED light brine; and a process of evaporation, namely evaporating the ED strong brine to obtain the salt. The invention discloses an economical and reasonable salt preparation method by taking the strong brine discharged by the seawater desalination plant as a raw material to prepare the salt; and compared with the prior salt preparation method, the raw material in the method provided by the invention is industrial wastewater, the recycling of wastes is realized, and wastewater discharge is reduced at the same time, so that the method is environmentally friendly and energy-saving and has very high economic and social benefits.
Description
Technical field
The present invention relates to field of seawater desalination, particularly relate to a kind of method and system of the strong brine salt manufacturing utilizing sea water desaltination to discharge.
Background technology
Along with global water resources shortage is day by day serious, the desalinator (device) of reverse osmosis membrane technology is adopted to increase fast.According to GWIDesalData/IDA statistics, adopt the proportion of desalinator in total sea water desaltination production capacity of reverse osmosis technology to account for 59.85%, close 3,974 ten thousand m3/d.By 2011, sea water desaltination work was carried out in existing more than 150 countries and regions in the world, and within 2010, newly-increased desalinator production capacity of going into operation is 6,270,000 m3/d, newly-increased production capacity 680m3/d in 2011.Wherein 80% of desalination water for tap water, solves the water supply problem of people more than 100,000,000, estimates that in 5-10 from now on, relate to people's actinal surface increases continuation.China current sea water desaltination production capacity 700,000 m3/d, according to National Development and Reform Committee's multipurpose use of sea water planning, will reach the production capacity of 2,600,000 tpds to the year two thousand twenty China, reaches 4%-16% respectively simultaneously to the water resources contribution rate in different coastal cities.
Calculate according to the seawater utilization rate of current reverse osmosis membrane desalination system, can only reach about 25-30%, that is a desalinator is by the strong brine of its production capacity twice of discharge.But, the medial temperature of strong brine is about 40 DEG C, salts contg is more than the twice of former seawater, directly be disposed in seawater, heat and the salt resource of the seawater concentrated solution after desalination just waste, and can the local pollution of the environment be caused, and the eubiosis is impacted, be unfavorable for the Sustainable development of Seawater Desalination Project.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of method and system of the strong brine salt manufacturing utilizing sea water desaltination to discharge.
Technical scheme of the present invention is as follows:
A method for the strong brine salt manufacturing utilizing desalinator to discharge, it comprises
Hard-off operation, the strong brine of desalinator discharge obtains the dense water of hard-off, the COD≤200mg/L of the dense water of wherein said hard-off, hardness≤50mg/L after the process of hard-off operation;
Ionic membrane enrichment process, adopt ionic membrane to carry out concentration to the dense water of described hard-off, the dense water of described hard-off obtains ED strong brine and ED light salt brine after the process of ionic membrane enrichment process; TDS in wherein said ED strong brine is 8000mg/L ~ 12000mg/L, pH is 6.5 ~ 8, COD≤200mg/L, SS≤1mg/L;
Evaporization process, carrying out evaporation process to described ED strong brine can obtain salt.
Wherein, adopt pre-treatment strong brine described in nanofiltration membrane treatment in described hard-off operation, the working pressure of described nanofiltration membrane is 0.5 to 2.0MPa.
Further, described nanofiltration membrane is monovalent ion selective membrane.
Wherein, the ionic membrane adopted in described ionic membrane enrichment process is monovalent ion selective membrane CIMS-ACS.
Wherein, in described hard-off operation, filtrate is 1:4.5 ~ 6.5 with the water yield ratio of the dense water of hard-off.
Wherein, in described ionic membrane enrichment process, ED light salt brine is 6 ~ 9:1 with the water yield ratio of ED strong brine.
Wherein, the content of the NaCl in described ED strong brine is greater than 90%.
Accordingly, the present invention also provides a kind of system of the strong brine salt manufacturing utilizing desalinator to discharge, and it comprises the nano-filtration membrane filter, ionic membrane reactor and the vaporizer that connect successively; The rising pipe of described nano-filtration membrane filter is communicated with described ionic membrane reactor, and the dense water pipe of described ionic membrane reactor is communicated with described vaporizer;
Wherein said ionic membrane reactor comprises membrane stack, polar region and hold-down gear, and the anionic membrane that wherein said membrane stack adopts is homogeneous phase ion-selective membrane ACS, and cationic membrane is homogeneous phase monovalent ion selective membrane CIMS.
Wherein, described ionic membrane reactor comprises a hold-down gear and four groups of membrane stacks, and described four groups of membrane stacks are arranged in a hold-down gear.
Wherein, the described fresh water pipe of ionic membrane reactor is connected with the water inlet pipe of the reverse osmosis filter of desalinator.
The invention has the beneficial effects as follows:
(1) strong brine that the present invention discharges using desalinator carrys out salt manufacturing as raw material, proposes a kind of salt extraction process of economical rationality; Compared with existing salt extraction process, raw material of the present invention is trade effluent, achieves refuse reclamation, decreases discharge of wastewater simultaneously, environmental protection and energy saving, has very high economic benefit and social benefit; Have employed membrane process, omnidistance pollution-free, salt manufacturing efficiency is high, the high purity 98% of obtained salt, and whole salt producing craft is zero blowdown technique simultaneously;
(2) the present invention adopts the combination process of nanofiltration membrane+ionic membrane to process the strong brine that desalinator discharges, processed further by the strong brine discharged desalinator and produce fresh water phase (ED light salt brine), wherein fresh water accounts for more than 93% into water mutually, thus the strong brine making desalinator discharge is recycled further, improve the water rate of sea water desaltination; Except fresh water phase, the present invention also produces the ED strong brine of high enrichment, and it is by obtaining salt through evaporative crystallizer crystallisation solidification, moreover the wastewater zero discharge of real desalinator, has good economic benefit and social benefit.
(3) the ED strong brine obtained after adopting ionic membrane reactor for treatment strong brine has the feature of high-cleanness, high, directly can prepare high-quality salt.Adopt method of the present invention that subsequent evaporation device treatment scale can be made to reduce 75%, can reduce the overall investment of more than 20%, after evaporation area significantly reduces, system can save the steam consumption quantity of 60%, reduces by more than 40% operation energy consumption.
Accompanying drawing explanation
Fig. 1 is the water balance figure of the system of the strong brine salt manufacturing utilizing desalinator to discharge of the present invention.
Embodiment
In order to make the object of the method and system of the strong brine salt manufacturing utilizing desalinator to discharge of the present invention, technical scheme and advantage clearly understand, below in conjunction with concrete drawings and the specific embodiments, the present invention is further elaborated.
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
The invention provides a kind of method of the strong brine salt manufacturing utilizing desalinator to discharge, it comprises
S100: hard-off operation, the strong brine of desalinator discharge obtains the dense water of hard-off, the COD≤200mg/L of the dense water of wherein said hard-off, hardness≤50mg/L after the process of hard-off operation; I.e. calcium ions and magnesium ions form A a
2+≤ 25mg/L, Mg
2+≤ 25mg/L; The inflow requirement condition concentrated according to ionic membrane membrane stack high power, must to entering water hardness Ca
2+, Mg
2+content carry out restricted removing, this technique adopts monovalence nanofiltration selective membrane to realize sofening treatment, also has dissolved organic matter in water simultaneously and certain removes ability.Described nanofiltration membrane aperture is 1 ~ 100 nanometer, retains particle diameter 0.001 μm, molecular weight 200 ~ 1000 material.The working pressure of described nanofiltration membrane treatment operation is generally 0.5 ~ 2.0MPa.
S200: ionic membrane enrichment process, ionic membrane is adopted to carry out concentration to the dense water of described hard-off, the dense water of described hard-off obtains ED (Electrodialysis electrodialysis, hereinafter referred ED) strong brine and ED light salt brine after the process of ionic membrane enrichment process; TDS in wherein said ED strong brine is 8000mg/L ~ 12000mg/L, pH is 6.5 ~ 8, COD≤200mg/L, SS≤1mg/L; ED light salt brine can be back to the water inlet as reverse osmosis operation in the reverse osmosis operation of sea water desaltination production, through test, ED fresh water accounts for more than 85% of the flooding quantity of whole technique mutually, and this part ED fresh water phase reuse can make the water use efficiency of desalinator improve about 40%.The ED strong brine simultaneously produced can be used for the refined brine of direct evaporative crystallizer or PVC industrial caustic soda electrolyzer.
S300: evaporization process, carrying out evaporation process to described ED strong brine can obtain salt.Carrying out evaporation process to ED strong brine and controlling final temperature when normal pressure is 105.5-107.0 DEG C, solid sodium chloride and concentration and evaporation liquid can be obtained, keep input and output material balance and control the mass percentage 8% ~ 11% of sodium-chlor in concentration and evaporation liquid, the mass percentage 12% ~ 15% of Repone K simultaneously; Here the numerical value of final temperature is under true pressure, and actual temperature is converted into the numerical value under normal pressure according to Charles law; Preferably, evaporation mode is forced evaporation or multiple-effect evaporation, final temperature is 106.3 DEG C, this process preferably uses MVR steam thermocompression evaporator or multiple-effect evaporator, optimum is MVR steam thermocompression evaporator, improve heat utilization rate, decrease steam consumption, thus consequently reduce CO2 emissions; By the described solid sodium chloride that obtains through dehydration, dry, purified salt can also be obtained.
The present invention first proposed the method for the strong brine of a kind of Appropriate application desalinator discharge, avoids this part strong brine and enters the energy dissipation caused in sea; Have employed the ED strong brine that strong brine that suitable technique makes desalinator discharge becomes high-cleanness, high simultaneously, then adopt ED strong brine to prepare salt, because the cleanliness factor of ED strong brine is high, and the content of NaCl is high, the cleanliness factor of therefore obtained salt is high, quality better.Therefore, the invention provides a kind of method of Appropriate application trade effluent, turn waste into wealth, meet the requirement of national energy-saving environmental protection.
Water inlet of the present invention is the strong brine of desalinator discharge, and the water quality of water inlet is generally: TDS:30000 ~ 70000, hardness: 500 ~ 800, COD:300 ~ 500, and the TDS content of this part water inlet is very high.In order to Appropriate application desalinator discharge dense smoke with, present invention employs ionic membrane method process.Ionic membrane method is a kind of technological line adopting special concentrated ionic membrane in electroosmose process, its technical characterstic carries out high power simmer down to object to dissolved salt in water, its principle be ion-exchange membrane under DC electric field to solution in electrolytical zwitterion select through, namely positively charged ion can through anode membrane, and negatively charged ion can through cavity block.The compartment be made up of dividing plate and film is generally included in ionic membrane reactor, negatively charged ion anode direction in its dense room migrates across former and by the anode membrane detention in light room in light room, positively charged ion then migrates across anode membrane and by the cavity block detention in dense room in dense room to cathode direction, solution thus in light room can be desalinated, solution in dense room then increases concentration, thus cross desalination, concentrated, refining object.Ion-exchange membrane is the most critical part of ion-exchange membrane facility.It is generally acknowledged that practical ion-exchange membrane should possess: selective penetrated property is good, and membrane resistance is little, good chemical stability, higher physical strength and good dimensional stability, lower diffusion and low price etc.The general conventional fresh water of ionic membrane reactor is not more than about 6 with the salt solution concentration difference multiple ratio of dense aqueous phase, this technique combines the process characteristic of water inlet, have employed monovalent ion selective membrane CIMS-ACS, make that there is between the ED light salt brine of this technique and ED strong brine very high concentration difference ratio, under steady-working state, two-phase concentration difference multiple can reach 10-20 doubly, and therefore its processing efficiency is very high with recovery waste water ability.In addition, the overall energy consumption level of technique of the present invention is low, the process energy consumption of ionic membrane reactor depends on the degree that the electric current in membrane stack intermediate ion migration course utilizes, it directly affects electrodialysis and current efficiency and desalting effect, membrane stack average current efficiency >=85% in this technique after tested, far above the current efficiency level of general electrodialysis unit.
The strong brine that the present invention mainly adopts ionic membrane desalination/concentration technique process desalinator to discharge, the operational condition of ionic membrane can be carried out under normal temperature, normal pressure, and its environmental friendliness, operational process is shockproof, no waste discharge, and operational condition as mild as a dove, the strong brine produced is the salt solution of high-cleanness, high, COD≤50, can direct high-quality Industrial Salt processed, ionic membrane system is to the better tolerance of influent quality, water yield change simultaneously, has the wide advantage of applicable elements.
General, ionic membrane is separated for high salt has higher efficiency, but run unstable, higher to inflow requirement, therefore the present invention carries out the process of water demineralization and organics removal to the mode of hydromining nanofiltration membrane in the front end of ionic membrane enrichment process (S300), thus realizes the real efficient process of ionic membrane operation.
In order to make the treatment effect of ionic membrane reactor good in the present invention, long service life, is provided with the water quality parameter of the water inlet entering ionic membrane reactor, i.e. COD≤the 200mg/L of hard-off strong brine, hardness≤50mg/L, SS≤1.Such flow condition can improve the work-ing life of ionic membrane reactor to greatest extent, thus reduces working cost.
The present invention adopts hard-off operation and ionic membrane enrichment process to organically combine, and farthest improves the processing efficiency of strong brine, makes the degree of crystallinity of the ED strong brine obtained high simultaneously, is applicable to very much salt manufacturing and uses.Adopt method of the present invention the water inlet of of the present invention more than 90% can be purified as fresh water, the very high salt manufacturing raw material of purity can be obtained simultaneously.
Wherein in an embodiment, adopt pre-treatment strong brine described in nanofiltration membrane treatment in described hard-off operation, the working pressure of described nanofiltration membrane is 0.5 to 2.0MPa.Described nanofiltration membrane aperture is nano level, can retain particle diameter 0.001 μm, molecular weight 200 ~ 1000 material.
More excellent, the nanofiltration membrane in the present embodiment is monovalent ion selective membrane.Monovalent ion in the present embodiment selects nanofiltration membrane only to allow ion to pass through, thus make to retain into the equal nanofiltration membrane of other ions except monovalent ion in water (i.e. the strong brine of desalinator discharge), such setting is the cleanliness factor in order to improve follow-up ED strong brine, alleviate the processing pressure of follow-up ionic membrane reactor simultaneously, extend the work-ing life of ionic membrane reactor.
Wherein in an embodiment, in described hard-off operation, filtrate and the water yield of the dense water of hard-off are than being 1:4.5 ~ 6.5.Such setting can take into account processing efficiency and working cost simultaneously.
Wherein in an embodiment, in described ionic membrane enrichment process, ED light salt brine is 6 ~ 9:1 with the water yield ratio of ED strong brine.Present invention employs monovalent ion selective membrane CIMS-ACS, and take into account economy and efficiency simultaneously, it is 6 ~ 9:1 that the present invention sets ED light salt brine with the water yield ratio of ED strong brine.
Wherein in an embodiment, the content of the NaCl in described ED strong brine is greater than 90%.The NaCl content of the ED strong brine that the present invention produces is high, adopt method of the present invention that subsequent evaporation device treatment scale can be made to reduce 75%, the overall investment of more than 20% can be reduced, after evaporation area significantly reduces, system can save the steam consumption quantity of 60%, reduces by more than 40% operation energy consumption.
Based on same inventive concept, see Fig. 1 (the dotted line frame in Fig. 1 is system of the present invention), the present invention also provides a kind of system of the strong brine salt manufacturing utilizing desalinator to discharge, and it comprises the nano-filtration membrane filter, ionic membrane reactor and the vaporizer that connect successively; The rising pipe of described nano-filtration membrane filter is communicated with described ionic membrane reactor, and the dense water pipe of described ionic membrane reactor is communicated with described vaporizer; Wherein said ionic membrane reactor comprises membrane stack, polar region and hold-down gear, and the anionic membrane that wherein said membrane stack adopts is homogeneous phase ion-selective membrane ACS, and cationic membrane is homogeneous phase monovalent ion selective membrane CIMS.
Monovalent ion permselectivity membrane (the positive and negative adopted in the present invention, hereinafter referred to as monovalence permselective membrane) refer in electrodialysis process, preferential through monovalence (positive and negative) ion, and stop the film of divalence (positive and negative) ion.
Monovalent ion nano-filtration membrane filter is have employed as preprocessor in the system of the strong brine salt manufacturing utilizing desalinator to discharge of the present invention, the requirement making the water inlet of ionic membrane reactor meet ionic membrane reactor on the one hand, thus extend the life-span of ionic membrane reactor, most of non-monovalent ion can be retained on the other hand, thus alleviate the processing pressure of follow-up ionic membrane reactor, improve processing efficiency and the work-ing life of subsequent ion membrane reactor.
In one embodiment, described ionic membrane reactor comprises a hold-down gear and four groups of membrane stacks, and described four groups of membrane stacks are arranged in a hold-down gear.Ionic membrane membrane stack is adopted in ionic membrane reactor; As the ionic membrane membrane stack of nucleus equipment, be made up of 4 groups of membrane stacks in 1 hold-down gear, its a whole set of size is only 2.5m × 0.8m × 1.6m, and complete assembly structure is compact, a people can complete and disassembles and install, be convenient to field management and maintenance during cleaning.(conversion of ton salt power consumption)≤160kWh/tNaCl of ionic membrane reactor of the present invention, convert≤3kWh/t in amount of inlet water (ton), energy consumption and performance reaches domestic (world) advanced level.
Ionic membrane reactor utilizes ion-exchange membrane to the selective penetrated property energy of zwitterion, under the effect of DC electric field, makes zwitterion generation directional migration, thus reach solution separating, purification and concentrated object.
In one embodiment, the water inlet pipe of reverse osmosis filter that the fresh water pipe of described ionic membrane reactor adopts with desalinator is connected.ED light salt brine in the fresh water pipe of ionic membrane reactor can carry out filtering thus being purified further mutually by this part fresh water as the water inlet of reverse osmosis filter again.Such setting can improve the water rate of fresh water, achieves zero blowdown simultaneously.
Further illustrate below by way of specific embodiment.
Embodiment one
See Fig. 1, the system of the strong brine salt manufacturing utilizing desalinator to discharge of the present embodiment comprises:
Nano-filtration membrane filter; The water inlet of nano-filtration membrane filter is that (in the present embodiment, the water yield of the strong brine of desalinator discharge is 1.912m3/h for the strong brine of desalinator discharge, the filtrate of 0.28m3/h and the dense water of hard-off of 1.625m3/h can be obtained after nano-filtration membrane filter process, the aperture of the nanofiltration membrane in the present embodiment is 10 nanometers, and working pressure is generally 1.0MPa;
Ionic membrane reactor; The water inlet of ionic membrane reactor is the dense water of hard-off, can obtain the ED strong brine (TDS is 228820mg/L) of 0.2m3/h and the ED light salt brine (TDS is 27061mg/L) of 1.43m3/h after ionic membrane reactor for treatment;
Vaporizer, adopts vaporizer to carry out evaporative crystallization process to ED strong brine and can obtain salt.
Ionic membrane reactor in the present embodiment adopts anion/cation film to be respectively monovalent ion selective membrane CIMS-ACS composition ionic membrane device, four membrane stacks are the arrangement of one-level one-part form, under steady-working state, two-phase concentration difference multiple can reach 15 times, membrane stack average current efficiency >=85% in this technique, far above the current efficiency level of general electrodialysis unit.The ionic membrane adopted in ionic membrane reactor is Japan's product homogeneous phase ionic membrane diaphragm, and four membrane stacks are the arrangement of one-level one-part form.
Water inlet in the present embodiment is the strong brine that desalinator is discharged, and the water quality of strong brine is in table 1.
Table 1 influent quality
| Index | Unit | Water quality |
| K | mg/L | 1.283 |
| Na | mg/L | 17.840 |
| Mg | mg/L | 629 |
| Ca | mg/L | 387 |
| HCO3 | mg/L | 7 |
| NO3 | mg/L | 0 |
| Cl | mg/L | 31.016 |
| SO4 | mg/L | 110 |
| TDS | mg/L | 51272 |
| Total-C | 629 | |
| COD | <200 |
The water quality of the ED strong brine that the present embodiment obtains is in table 2.
| Index | Unit | Water quality |
| K | mg/L | 7.773 |
| Na | mg/L | 83.143 |
| Mg | mg/L | 293 |
| Ca | mg/L | 541 |
| HCO3 | mg/L | 13 |
| NO3 | mg/L | 0 |
| Cl | mg/L | 137.050 |
| SO4 | mg/L | 7 |
| TDS | mg/L | 228820 |
| Total-C | 293 | |
| COD | 5 |
The TDS of the ED strong brine that the present embodiment obtains is 228820mg/L, and wherein 93% is NaCl, and each proportion of composing is more stable.The ED strong brine (bittern) of the present invention's discharge is also called " liquid salt ", raw material for soda industry supplements, with reference to QB/T1879-2001 industry standard, this standard specifies soda industry salt, the liquid salt meeting this standard can be directly used in the material inlet producing caustic soda, soda industry device, and technical indicator is as shown in table 3.
Table 3 liquid salt technical indicator
This technique continuous and stable production, the steady quality of product liquid salt.Electrodialysis preparing salt by concentrating sea water process current efficiency 80 ~ 84%, ratio of desalinization is 20 ~ 30%, and in obtained liquid salt, the content of NaCl can reach 200g/L, and the direct current consumption of NaCl per ton is 160 ~ 180kWh.
Data as can be seen from above:
(1) ED light salt brine and the salt solution concentration difference multiple of ED strong brine are than >=10, and for the important indicator characterizing ionic membrane material characteristics, it is poor that concentration difference ratio embodies ionic membrane gegenion rate of migration.
(2) dispose through ionic membrane (electricity drives ionic membrane) device brine concentration, produce ED light salt brine and the two kinds of water outlets of ED strong brine respectively, the wherein ED light salt brine water outlet water yield: account for 85% into water total amount, TDS≤27061mg/L, the ED strong brine water outlet water yield accounts for into water total amount 15%, TDS >=228820mg/L, system water utilization ratio >=93%.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claim.
Claims (10)
1. a method for the strong brine salt manufacturing utilizing desalinator to discharge, is characterized in that, comprise
Hard-off operation, the strong brine of desalinator discharge obtains the dense water of hard-off, the COD≤200mg/L of the dense water of wherein said hard-off, hardness≤50mg/L after the process of hard-off operation;
Ionic membrane enrichment process, adopt ionic membrane to carry out concentration to the dense water of described hard-off, the dense water of described hard-off obtains ED strong brine and ED light salt brine after the process of ionic membrane enrichment process; TDS in wherein said ED strong brine is 8000mg/L ~ 12000mg/L, pH is 6.5 ~ 8, COD≤200mg/L, SS≤1mg/L;
Evaporization process, carrying out evaporation process to described ED strong brine can obtain salt.
2. the method for the strong brine salt manufacturing utilizing desalinator to discharge according to claim 1, is characterized in that, adopts pre-treatment strong brine described in nanofiltration membrane treatment in described hard-off operation, and the working pressure of described nanofiltration membrane is 0.5 to 2.0MPa.
3. the method for the strong brine salt manufacturing utilizing desalinator to discharge according to claim 2, is characterized in that, described nanofiltration membrane is monovalent ion selective membrane.
4. the method for the strong brine salt manufacturing utilizing desalinator to discharge according to claim 1, is characterized in that, the ionic membrane adopted in described ionic membrane enrichment process is monovalent ion selective membrane CIMS-ACS.
5. the method for the strong brine salt manufacturing utilizing desalinator to discharge according to claim 1, is characterized in that, in described hard-off operation, filtrate and the water yield of the dense water of hard-off are than being 1:4.5 ~ 6.5.
6. the method for the strong brine salt manufacturing utilizing desalinator to discharge according to claim 1, is characterized in that, in described ionic membrane enrichment process, ED light salt brine is 6 ~ 9:1 with the water yield ratio of ED strong brine.
7. the method for the strong brine salt manufacturing utilizing desalinator to discharge according to claim 1, is characterized in that, the content of the NaCl in described ED strong brine is greater than 90%.
8. a system for the strong brine salt manufacturing utilizing desalinator to discharge, is characterized in that, comprises the nano-filtration membrane filter, ionic membrane reactor and the vaporizer that connect successively; The rising pipe of described nano-filtration membrane filter is communicated with described ionic membrane reactor, and the dense water pipe of described ionic membrane reactor is communicated with described vaporizer;
Wherein said ionic membrane reactor comprises membrane stack, polar region and hold-down gear, and the anionic membrane that wherein said membrane stack adopts is homogeneous phase ion-selective membrane ACS, and cationic membrane is homogeneous phase monovalent ion selective membrane CIMS.
9. the system of the strong brine salt manufacturing utilizing desalinator to discharge according to claim 8, is characterized in that, described ionic membrane reactor comprises a hold-down gear and four groups of membrane stacks, and described four groups of membrane stacks are arranged in a hold-down gear.
10. the system of the strong brine salt manufacturing utilizing desalinator to discharge according to claim 8, is characterized in that, the described fresh water pipe of ionic membrane reactor is connected with the water inlet pipe of the reverse osmosis filter of desalinator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510751255.6A CN105254105A (en) | 2015-11-06 | 2015-11-06 | Method and system for preparing salt by using strong brine discharged from seawater desalination plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510751255.6A CN105254105A (en) | 2015-11-06 | 2015-11-06 | Method and system for preparing salt by using strong brine discharged from seawater desalination plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105254105A true CN105254105A (en) | 2016-01-20 |
Family
ID=55094110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510751255.6A Pending CN105254105A (en) | 2015-11-06 | 2015-11-06 | Method and system for preparing salt by using strong brine discharged from seawater desalination plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105254105A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109650608A (en) * | 2017-10-12 | 2019-04-19 | 华东理工大学 | It is a kind of using chemical method-nanofiltration-it is reverse osmosis-electrodialysis integrate concentrated seawater softening and concentration technology |
| CN109650607A (en) * | 2017-10-12 | 2019-04-19 | 华东理工大学 | A kind of reverse osmosis integrated concentrated seawater softening of chemical method-electrodialysis-and concentration technology |
| CN113233662A (en) * | 2021-05-31 | 2021-08-10 | 南开大学 | Integrated membrane process treatment system and method for seawater desalination concentrated seawater |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683289A (en) * | 2004-03-15 | 2005-10-19 | 住友化学株式会社 | Process for ionic compound water soluble liquid |
| CN101397152A (en) * | 2007-09-28 | 2009-04-01 | 旭化成化学株式会社 | Brine treatment method |
| CN101693564A (en) * | 2009-10-20 | 2010-04-14 | 葛文宇 | Circulating extraction processing combined production technique for realizing comprehensive seawater utilization |
| CN101878187A (en) * | 2007-11-30 | 2010-11-03 | 西门子水处理技术公司 | Systems and methods for water treatment |
| CN102633389A (en) * | 2012-03-28 | 2012-08-15 | 中国人民解放军军事医学科学院卫生装备研究所 | Method and device for getting fresh water by treating reverse osmosis concentrated water |
| CN102774994A (en) * | 2011-05-13 | 2012-11-14 | 周健 | Combined new process for recovery of salt-containing wastewater through membrane separation |
| CN102942279A (en) * | 2012-10-12 | 2013-02-27 | 江苏华晖环保科技有限公司 | Treatment method for circulating water sewerage and reverse osmosis concentrated water and equipment thereof |
| CN103443172A (en) * | 2011-03-29 | 2013-12-11 | 株式会社亚斯通 | Ion-exchange membrane |
| JP2015029931A (en) * | 2013-07-31 | 2015-02-16 | 三菱重工業株式会社 | Desalination apparatus and desalination method, method for producing fresh water, and method for co-producing fresh water, salt and valuable-material |
| CN104370405A (en) * | 2014-10-27 | 2015-02-25 | 浙江开创环保科技有限公司 | Treatment method for zero discharge of high-hardness high-salinity wastewater |
| CN104370396A (en) * | 2014-10-26 | 2015-02-25 | 中盐工程技术研究院有限公司 | Zero-emission treatment method and device for desalinating strong brine by using seawater |
| US20150251137A1 (en) * | 2011-07-18 | 2015-09-10 | Hl Seawater Holdings, Llc | Membrane and electrodialysis based seawater desalination with salt, boron and gypsum recovery |
| CN205151982U (en) * | 2015-11-06 | 2016-04-13 | 北京津工海水科技有限公司 | System for utilize strong brine salt manufacturing of seawater desalination mill emission |
-
2015
- 2015-11-06 CN CN201510751255.6A patent/CN105254105A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683289A (en) * | 2004-03-15 | 2005-10-19 | 住友化学株式会社 | Process for ionic compound water soluble liquid |
| CN101397152A (en) * | 2007-09-28 | 2009-04-01 | 旭化成化学株式会社 | Brine treatment method |
| CN101878187A (en) * | 2007-11-30 | 2010-11-03 | 西门子水处理技术公司 | Systems and methods for water treatment |
| CN101693564A (en) * | 2009-10-20 | 2010-04-14 | 葛文宇 | Circulating extraction processing combined production technique for realizing comprehensive seawater utilization |
| CN103443172A (en) * | 2011-03-29 | 2013-12-11 | 株式会社亚斯通 | Ion-exchange membrane |
| CN102774994A (en) * | 2011-05-13 | 2012-11-14 | 周健 | Combined new process for recovery of salt-containing wastewater through membrane separation |
| US20150251137A1 (en) * | 2011-07-18 | 2015-09-10 | Hl Seawater Holdings, Llc | Membrane and electrodialysis based seawater desalination with salt, boron and gypsum recovery |
| CN102633389A (en) * | 2012-03-28 | 2012-08-15 | 中国人民解放军军事医学科学院卫生装备研究所 | Method and device for getting fresh water by treating reverse osmosis concentrated water |
| CN102942279A (en) * | 2012-10-12 | 2013-02-27 | 江苏华晖环保科技有限公司 | Treatment method for circulating water sewerage and reverse osmosis concentrated water and equipment thereof |
| JP2015029931A (en) * | 2013-07-31 | 2015-02-16 | 三菱重工業株式会社 | Desalination apparatus and desalination method, method for producing fresh water, and method for co-producing fresh water, salt and valuable-material |
| CN104370396A (en) * | 2014-10-26 | 2015-02-25 | 中盐工程技术研究院有限公司 | Zero-emission treatment method and device for desalinating strong brine by using seawater |
| CN104370405A (en) * | 2014-10-27 | 2015-02-25 | 浙江开创环保科技有限公司 | Treatment method for zero discharge of high-hardness high-salinity wastewater |
| CN205151982U (en) * | 2015-11-06 | 2016-04-13 | 北京津工海水科技有限公司 | System for utilize strong brine salt manufacturing of seawater desalination mill emission |
Non-Patent Citations (5)
| Title |
|---|
| 张芳等: "《电厂水处理技术》", 30 September 2014, 中国电力出版社 * |
| 涂丛慧等: "电渗析法去除水体中无机盐的研究进展", 《水处理技术》 * |
| 苏威: "膜分离技术的应用及前景", 《广东化工》 * |
| 苏山: "《海洋开发技术》", 30 April 2013, 北京工业大学出版社 * |
| 陈学雷: "《海洋资源开发与管理》", 30 September 2000, 科学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109650608A (en) * | 2017-10-12 | 2019-04-19 | 华东理工大学 | It is a kind of using chemical method-nanofiltration-it is reverse osmosis-electrodialysis integrate concentrated seawater softening and concentration technology |
| CN109650607A (en) * | 2017-10-12 | 2019-04-19 | 华东理工大学 | A kind of reverse osmosis integrated concentrated seawater softening of chemical method-electrodialysis-and concentration technology |
| CN113233662A (en) * | 2021-05-31 | 2021-08-10 | 南开大学 | Integrated membrane process treatment system and method for seawater desalination concentrated seawater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104445755B (en) | A kind of method for ammonium chloride waste-water recycling treatment | |
| Chen et al. | Conversion and pre-concentration of SWRO reject brine into high solubility liquid salts (HSLS) by using electrodialysis metathesis | |
| CN104370394B (en) | A kind of processing method of surface water desalter by-product brine waste | |
| CN107398181B (en) | Electrodialysis device for quality-based concentration of strong brine in coal chemical industry | |
| CN107265734B (en) | Reverse osmosis concentrated seawater treatment system and method | |
| CN101928088B (en) | Method for treating reverse osmosis concentrated water of petrochemical enterprises | |
| CN103723799A (en) | Electrodialyzer and near-zero-release industrial wastewater recycling technique | |
| CN103073131A (en) | Process for treating amantadine bromination waste water and mineral acid and alkali recycling through bipolar membrane electrodialysis process | |
| CN102295392A (en) | Method for treating and reusing calcium chloride wastewater | |
| CN105254083A (en) | Process and system for treating high salinity wastewater in coal chemical industry | |
| CN110818192A (en) | Industrial park mixed wastewater desalination process | |
| CN102267747B (en) | Electrodialysis concentration salt-making device | |
| CN110451707A (en) | A kind of waste water of mine Zero discharge treatment method | |
| WO2021036406A1 (en) | Zero liquid discharge systems and processes for high-salinity wastewater treatment | |
| CN109534568A (en) | Integrated seawater resources utilization system | |
| CN114849478B (en) | Asymmetric bipolar membrane electrodialysis device and acid-base preparation method | |
| CN105254105A (en) | Method and system for preparing salt by using strong brine discharged from seawater desalination plant | |
| CN101935111A (en) | Wastewater recycling preparation system with low energy consumption | |
| CN1850645A (en) | Combined production process technology for low-cost zero-emission sea water desalination comprehensive utilization | |
| CN103508603B (en) | Hot-membrane co-production sea water desalination method | |
| CN205151982U (en) | System for utilize strong brine salt manufacturing of seawater desalination mill emission | |
| CN109574366B (en) | High-salinity waste water salt concentration treatment system and process | |
| CN204569566U (en) | A kind of sea water desaltination utilization system | |
| CN105236658A (en) | Method and system for preparing salt from seawater | |
| CN207259308U (en) | Integrated seawater resources utilization system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160120 |