CN219631035U - Salt lake lithium-titanium adsorbent analysis qualified liquid concentration impurity removal system - Google Patents
Salt lake lithium-titanium adsorbent analysis qualified liquid concentration impurity removal system Download PDFInfo
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- CN219631035U CN219631035U CN202320870084.9U CN202320870084U CN219631035U CN 219631035 U CN219631035 U CN 219631035U CN 202320870084 U CN202320870084 U CN 202320870084U CN 219631035 U CN219631035 U CN 219631035U
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- nanofiltration membrane
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- membrane system
- reverse osmosis
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- 239000007788 liquid Substances 0.000 title claims abstract description 25
- 238000004458 analytical method Methods 0.000 title claims abstract description 20
- 239000012535 impurity Substances 0.000 title abstract description 16
- 239000003463 adsorbent Substances 0.000 title abstract description 10
- SWAIALBIBWIKKQ-UHFFFAOYSA-N lithium titanium Chemical compound [Li].[Ti] SWAIALBIBWIKKQ-UHFFFAOYSA-N 0.000 title abstract description 8
- 239000012528 membrane Substances 0.000 claims abstract description 88
- 238000001728 nano-filtration Methods 0.000 claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 41
- 229920002678 cellulose Polymers 0.000 claims abstract description 8
- 239000001913 cellulose Substances 0.000 claims abstract description 8
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 8
- 239000012141 concentrate Substances 0.000 claims abstract description 4
- 239000012466 permeate Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011575 calcium Substances 0.000 abstract description 6
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 abstract description 5
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 5
- 229910001425 magnesium ion Inorganic materials 0.000 abstract description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 4
- 239000011347 resin Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 17
- 229910052744 lithium Inorganic materials 0.000 description 17
- 238000000926 separation method Methods 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- GCICAPWZNUIIDV-UHFFFAOYSA-N lithium magnesium Chemical compound [Li].[Mg] GCICAPWZNUIIDV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The utility model discloses a salt lake lithium-titanium adsorbent analysis qualified liquid concentration impurity removal system which comprises an analysis qualified liquid tank (1), a cellulose filter (2), an ultrafiltration membrane system (3), a first-stage high-pressure reverse osmosis system (4), a first-stage nanofiltration membrane system (5), a second-stage nanofiltration membrane system (6), a third-stage nanofiltration membrane system (7), a fourth-stage nanofiltration membrane system (9) and a second-stage high-pressure reverse osmosis system (10). The method adopts the mode of pretreatment, cross combination of the reverse osmosis membrane and the nanofiltration membrane to concentrate and remove impurities from the analysis qualified liquid, is easy to realize and has no pollution to the environment, meanwhile, the lithium ion concentration can be concentrated to the required concentration by the connection mode of arranging the cross combination, the calcium and magnesium ion content can be effectively reduced, the pressure is relieved for the subsequent resin impurity removal, the equipment quantity can be effectively reduced, the investment cost is reduced, and the water resource is saved.
Description
Technical Field
The utility model relates to the technical field of lithium extraction equipment of salt lakes, in particular to a system for concentrating and removing impurities from a qualified solution of a lithium-titanium adsorbent extracted from salt lakes.
Background
In recent years, with the development of electric automobiles, lithium products are continuously increasing in demand, and lithium is used as a metal element with the lightest mass, the smallest density and the highest chemical activity in the nature, which is called as 'green high-energy metal' and 'white petroleum' in the 21 st century, and has wide application in a plurality of fields.
The lithium resource reserves in China are rich, and are mainly concentrated in Qinghai and Tibet in western regions, and are most prominent by salt lake resources. However, these areas are often fragile in environment, the economy and technology are relatively lagged, the development difficulty of extracting lithium resources from salt lake brine resources is high, and the lithium extraction from salt lakes is the key point of the current lithium extraction technology. Through years of exploration, china enterprises have developed various lithium extraction technical routes including an adsorption method (adsorption+membrane integration method), a membrane method, an electrodialysis method (one of membrane methods), a calcination method, a solvent extraction method and the like, and a solar pond crystallization method developed for Tibet zabuyer salt lake. The technology mainly adopted for the sulfite type salt lake of the Tibet is an adsorption coupling membrane method lithium extraction technology, wherein a continuous ion exchange device is used for adsorbing lithium in raw halogen by using a titanium adsorbent, and hydrochloric acid is used for resolving the saturated adsorption. The analysis qualified liquid is large in liquid quantity, contains a large amount of calcium and magnesium ions, insoluble matters and the like, and can enter the subsequent resin impurity removal process after effective concentration impurity removal treatment, but the current concentration impurity removal has the problems of more equipment, high investment cost, large occupied area, water resource waste and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a system for concentrating and removing impurities from a qualified solution of a salt lake lithium-titanium adsorbent.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a system for concentrating and removing impurities from a qualified solution of a salt lake lithium-titanium adsorbent comprises a qualified solution tank, a cellulose filter, an ultrafiltration membrane system, a first-stage high-pressure reverse osmosis system, a first-stage nanofiltration membrane system, a second-stage nanofiltration membrane system, a third-stage nanofiltration membrane system, a fourth-stage nanofiltration membrane system and a second-stage high-pressure reverse osmosis system;
the analysis qualified liquid tank, the cellulose filter, the ultrafiltration membrane system and the first-stage high-pressure reverse osmosis system are sequentially communicated along the flow direction of the analysis qualified liquid; the produced water outlet of the first-stage high-pressure reverse osmosis system is communicated with the inlet of the second-stage high-pressure reverse osmosis system, and the concentrated water outlet is communicated with the first-stage nanofiltration membrane system; the concentrated water outlet of the first-stage nanofiltration membrane system is communicated with the inlet of the fourth-stage nanofiltration membrane system, and the permeate outlet is communicated with the inlet of the second-stage nanofiltration membrane system; the permeate outlet of the secondary nanofiltration membrane system is communicated with the inlet of the tertiary nanofiltration membrane system, and the concentrated water outlet is communicated with the inlet of the primary nanofiltration membrane system; the concentrated water outlet of the three-stage nanofiltration membrane system is communicated with the inlet of the two-stage nanofiltration membrane system; the concentrated water outlet of the second-stage high-pressure reverse osmosis system is communicated with the inlet of the first-stage high-pressure reverse osmosis system, and the produced water outlet is communicated with the inlet of the fourth-stage nanofiltration membrane system; and a permeate outlet of the four-stage nanofiltration membrane system is communicated with an inlet of the first-stage high-pressure reverse osmosis system.
Further, a permeate outlet of the three-stage nanofiltration membrane system is communicated with a three-stage nanofiltration water production tank.
Further, a concentrated water outlet of the four-stage nanofiltration membrane system is communicated with a concentrated water tank.
Further, the water outlet of the second-stage high-pressure reverse osmosis system is respectively communicated with the inlet of the fourth-stage nanofiltration membrane system and the water producing tank.
The utility model has the beneficial effects that: the method adopts the mode of pretreatment, cross combination of the reverse osmosis membrane and the nanofiltration membrane to concentrate and remove impurities from the analysis qualified liquid, is easy to realize and has no pollution to the environment, meanwhile, the lithium ion concentration can be concentrated to the required concentration by the connection mode of arranging the cross combination, the calcium and magnesium ion content can be effectively reduced, the pressure is relieved for the subsequent resin impurity removal, the equipment quantity can be effectively reduced, the investment cost is reduced, and the water resource is saved.
Drawings
Fig. 1 is a schematic connection diagram of a system for concentrating and removing impurities from a qualified solution of a salt lake lithium-titanium adsorbent in an embodiment of the utility model.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings, and it should be noted that, while the present embodiment provides a detailed implementation and a specific operation process on the premise of the present technical solution, the protection scope of the present utility model is not limited to the present embodiment.
The embodiment provides a salt lake lithium-titanium adsorbent analysis qualified liquid concentration impurity removal system, which is shown in fig. 1, and comprises an analysis qualified liquid tank 1, a cellulose filter 2, an ultrafiltration membrane system 3, a first-stage high-pressure reverse osmosis system 4, a first-stage nanofiltration membrane system 5, a second-stage nanofiltration membrane system 6, a third-stage nanofiltration membrane system 7, a third-stage nanofiltration water production tank 8, a fourth-stage nanofiltration membrane system 9, a second-stage high-pressure reverse osmosis system 10, a water production tank 12 and a concentrated water tank 11;
the analysis qualified liquid tank 1, the cellulose filter 2, the ultrafiltration membrane system 3 and the first-stage high-pressure reverse osmosis system 4 are sequentially communicated along the flow direction of the analysis qualified liquid; the produced water outlet of the primary high-pressure reverse osmosis system 4 is communicated with the inlet of the secondary high-pressure reverse osmosis system 10, and the concentrated water outlet is communicated with the primary nanofiltration membrane system 5; the concentrated water outlet of the first-stage nanofiltration membrane system 5 is communicated with the inlet of the fourth-stage nanofiltration membrane system 9, and the permeate outlet is communicated with the inlet of the second-stage nanofiltration membrane system 6; the permeate outlet of the secondary nanofiltration membrane system 6 is communicated with the inlet of the tertiary nanofiltration membrane system 7, and the concentrated water outlet is communicated with the inlet of the primary nanofiltration membrane system 5; the permeate outlet of the three-stage nanofiltration membrane system 7 is communicated with the three-stage nanofiltration water production tank 8, and the concentrated water outlet is communicated with the inlet of the second-stage nanofiltration membrane system 6; the concentrated water outlet of the second-stage high-pressure reverse osmosis system 10 is communicated with the inlet of the first-stage high-pressure reverse osmosis system 4, and the produced water outlet is respectively communicated with the inlet of the fourth-stage nanofiltration membrane system 9 and the produced water tank 12; the concentrated water outlet of the four-stage nanofiltration membrane system 9 is communicated with the concentrated water tank 11, and the permeate outlet is communicated with the inlet of the primary high-pressure reverse osmosis system 4.
The working principle of the system is as follows:
pretreatment of qualified liquid: the adsorption analysis qualified liquid is conveyed to a cellulose filter 2 and an ultrafiltration membrane system 3 from an analysis qualified liquid tank 1 through a pump and a pipeline, and is pretreated to remove insoluble impurities in the adsorption analysis qualified liquid, including insoluble substances after titanium adsorbent solid crushing and titanium dissolving loss.
First-stage concentration: and the pretreated adsorption analysis qualified liquid is conveyed to a first-stage high-pressure reverse osmosis system 4 for concentration, so that the concentration of lithium and magnesium (calcium) in the liquid and the magnesium-lithium ratio are improved, and the separation performance of the nanofiltration membrane is improved while the water quantity and the treatment scale are reduced. The produced water of the first-stage high-pressure reverse osmosis system 4 enters the second-stage high-pressure reverse osmosis system 10 for further concentration, and the concentrated water of the second-stage high-pressure reverse osmosis system 10 returns to the first-stage high-pressure reverse osmosis system 4 for continuous concentration.
Primary separation: the concentrated water of the first-stage high-pressure reverse osmosis system 4 enters the first-stage nanofiltration membrane system 5 to intercept calcium and magnesium ions, lithium ions permeate, the first-stage separation is realized, then the concentrated water of the first-stage nanofiltration membrane system 5 enters the fourth-stage nanofiltration membrane system 9, the concentration of magnesium (calcium) in the concentrated water of the first-stage nanofiltration membrane system 5 is far higher than that of lithium, and the produced water of the second-stage high-pressure reverse osmosis system 10 is adopted for dialysis, so that the proportion of magnesium and lithium can be improved, the osmotic pressure can be reduced, and the system lithium yield can be provided. The permeate of the four-stage nanofiltration membrane system 9 flows back to the first-stage high-pressure reverse osmosis system 4 through a pipeline to continue concentration and separation treatment, and magnesium (calcium) in the concentrated water of the four-stage nanofiltration membrane system 9 reaches the limit concentration allowed by the nanofiltration membrane, so that the concentrated water is collected to the concentrated water tank 11 and discharged, and the concentration and separation of the first stage are completed.
Secondary separation: the permeate of the primary nanofiltration membrane system 5 enters the secondary nanofiltration membrane system 6 to remove calcium and magnesium, the permeate output by the secondary nanofiltration membrane system 6 enters the tertiary nanofiltration membrane system 7 to further remove calcium and magnesium ions, lithium in the product liquid can be concentrated to a certain concentration, and meanwhile, the concentration of magnesium (calcium) is reduced to a required concentration, so that the product liquid with high concentration enters the tertiary nanofiltration water production tank 8.
And (3) three-stage separation: in order to improve the yield of lithium, the concentrated water of the secondary nanofiltration membrane system is returned to the primary nanofiltration membrane system 5 for water inflow, the concentrated water of the tertiary nanofiltration membrane system 7 is returned to the secondary nanofiltration membrane system 6 for water inflow, and the cyclic separation and passivation are performed. In addition, since the concentrated water of the second-stage high-pressure reverse osmosis system 10 also contains a part of lithium ions, the water flows back to the first-stage high-pressure reverse osmosis system 4 for water inflow, and the recovery improves the lithium yield.
In addition, part of the produced water of the second-stage high-pressure reverse osmosis system 10 enters the four-stage nanofiltration membrane system 9 for nanofiltration of dialysis water, and the rest of the produced water enters the produced water tank 12.
Various modifications and variations of the present utility model will be apparent to those skilled in the art in light of the foregoing teachings and are intended to be included within the scope of the following claims.
Claims (4)
1. The system is characterized by comprising an analysis qualified liquid tank (1), a cellulose filter (2), an ultrafiltration membrane system (3), a first-stage high-pressure reverse osmosis system (4), a first-stage nanofiltration membrane system (5), a second-stage nanofiltration membrane system (6), a third-stage nanofiltration membrane system (7), a fourth-stage nanofiltration membrane system (9) and a second-stage high-pressure reverse osmosis system (10);
the analysis qualified liquid tank (1), the cellulose filter (2), the ultrafiltration membrane system (3) and the first-stage high-pressure reverse osmosis system (4) are sequentially communicated along the flow direction of the analysis qualified liquid; the produced water outlet of the first-stage high-pressure reverse osmosis system (4) is communicated with the inlet of the second-stage high-pressure reverse osmosis system (10), and the concentrated water outlet is communicated with the first-stage nanofiltration membrane system (5); the concentrated water outlet of the first-stage nanofiltration membrane system (5) is communicated with the inlet of the fourth-stage nanofiltration membrane system (9), and the permeate outlet is communicated with the inlet of the second-stage nanofiltration membrane system (6); the permeate outlet of the secondary nanofiltration membrane system (6) is communicated with the inlet of the tertiary nanofiltration membrane system (7), and the concentrated water outlet is communicated with the inlet of the primary nanofiltration membrane system (5); the concentrated water outlet of the three-stage nanofiltration membrane system (7) is communicated with the inlet of the second-stage nanofiltration membrane system (6); the concentrated water outlet of the second-stage high-pressure reverse osmosis system (10) is communicated with the inlet of the first-stage high-pressure reverse osmosis system (4), and the produced water outlet is communicated with the inlet of the fourth-stage nanofiltration membrane system (9); the permeate outlet of the four-stage nanofiltration membrane system (9) is communicated with the inlet of the first-stage high-pressure reverse osmosis system (4).
2. The system according to claim 1, characterized in that the permeate outlet of the three-stage nanofiltration membrane system (7) is connected with a three-stage nanofiltration water production tank (8).
3. The system according to claim 1, characterized in that the concentrate outlet of the four-stage nanofiltration membrane system (9) is connected with a concentrate tank (11).
4. The system according to claim 1, characterized in that the produced water outlet of the second-stage high-pressure reverse osmosis system (10) is respectively connected to the inlet of the fourth-stage nanofiltration membrane system (9) and the produced water tank (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320870084.9U CN219631035U (en) | 2023-04-11 | 2023-04-11 | Salt lake lithium-titanium adsorbent analysis qualified liquid concentration impurity removal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320870084.9U CN219631035U (en) | 2023-04-11 | 2023-04-11 | Salt lake lithium-titanium adsorbent analysis qualified liquid concentration impurity removal system |
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| Publication Number | Publication Date |
|---|---|
| CN219631035U true CN219631035U (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320870084.9U Active CN219631035U (en) | 2023-04-11 | 2023-04-11 | Salt lake lithium-titanium adsorbent analysis qualified liquid concentration impurity removal system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219631035U (en) |
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2023
- 2023-04-11 CN CN202320870084.9U patent/CN219631035U/en active Active
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