CN218709421U - Device for refining salt water from lake brine by non-chemical method - Google Patents
Device for refining salt water from lake brine by non-chemical method Download PDFInfo
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- CN218709421U CN218709421U CN202222974163.2U CN202222974163U CN218709421U CN 218709421 U CN218709421 U CN 218709421U CN 202222974163 U CN202222974163 U CN 202222974163U CN 218709421 U CN218709421 U CN 218709421U
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Abstract
The utility model discloses a device for refining salt water from lake brine by a non-chemical method, which comprises a regulating tank (1), a resin column (2), a nanofiltration device (3), a reverse osmosis device (4) and a refined salt water tank (5); the adjusting tank (1), the resin column (2) and the nanofiltration device (3) are sequentially communicated, a water production outlet of the nanofiltration device (3) is communicated with an inlet of the reverse osmosis device (4), and a concentrated water outlet of the reverse osmosis device (4) is communicated with the refined salt water tank (5). The utility model discloses a combination of resin column, nanofiltration device, reverse osmosis unit to salt lake brine adopts the non-chemical method to prepare and obtains refined salt solution as the raw materials, and the flow is short, efficient, impurity is few, thereby can reduce the salt lake and carry lithium cost.
Description
Technical Field
The utility model relates to a salt lake utilizes technical field, concretely relates to device of refined salt solution in non-chemical method follow lake bittern.
Background
At present, lithium-containing salt lakes in the world are mainly chlorinated salt lakes and carbonic acid salt lakes, the chlorinated salt lakes are mainly distributed in Qinghai regions, the Tibet regions are mainly sodium sulfate subtype carbonate alkaline salt lakes, and an adsorption method is the mainstream lithium extraction process, particularly in remote mining areas. The ion sieve adsorption method needs acid desorption, acid belongs to dangerous chemicals, the transportation cost is high, the environmental impact is large, in order to solve the problem of acid, the acid-base is prepared on site by a bipolar membrane method in the mainstream at present, and the raw material is inorganic salt (sodium chloride or sodium sulfate). Although inorganic salts are not hazardous chemicals, the problem of high transportation cost also exists. The traditional brine refining adopts a double-alkali method to remove impurities and then carries out deep refining by chelating resin, so that a large amount of chemical agents are consumed; however, a large amount of inorganic salt exists in the salt lake, but the salt lake is not well utilized due to the problems of complex components, high impurities and the like.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a device for refining salt water from lake brine by a non-chemical method.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a device for refining salt water from lake brine by a non-chemical method comprises a regulating tank, a resin column, a nanofiltration device, a reverse osmosis device and a refined salt water tank; the adjusting tank, the resin column and the nanofiltration device are sequentially communicated, a water production outlet of the nanofiltration device is communicated with an inlet of the reverse osmosis device, and a concentrated water outlet of the reverse osmosis device is communicated with a refined salt water tank.
Further, a water production outlet of the reverse osmosis device is communicated with the regulating reservoir.
Further, the resin column adopts a softening ion exchange resin column.
The beneficial effects of the utility model reside in that: the utility model discloses a combination of resin column, nanofiltration device, reverse osmosis unit to salt lake brine adopts the non-chemical method to prepare and obtains refined salt solution as the raw materials, and the flow is short, efficient, impurity is few, thereby can reduce the salt lake and carry lithium cost.
Drawings
FIG. 1 is a schematic diagram of an apparatus for non-chemical purification of brine from lake brine according to example 1 of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the present embodiment.
Example 1
The embodiment provides a device for refining salt water from lake brine by a non-chemical method, which is shown in figure 1 and comprises a regulating tank 1, a resin column 2, a nanofiltration device 3, a reverse osmosis device 4 and a refined salt water tank 5; the adjusting tank 1, the resin column 2 and the nanofiltration device 3 are communicated in sequence, a water production outlet of the nanofiltration device 3 is communicated with an inlet of the reverse osmosis device 4, and a concentrated water outlet of the reverse osmosis device 4 is communicated with a refined salt water tank 5.
In the embodiment, the produced water outlet of the reverse osmosis device 4 is communicated with the regulating reservoir 1.
In this embodiment, the resin column 2 is a softened ion exchange resin column.
The working principle of the device for refining the brine from the lake brine by the non-chemical method is as follows: the lake brine is pumped into a regulating tank 1, pure water is added to dilute the lake brine initially to reduce the salinity of the lake brine, and the produced water of a reverse osmosis device 4 is used for dilution subsequently (if the produced water is insufficient, the pure water can be supplemented). After being mixed evenly, the mixture enters a softening ion exchange resin column at the flow rate of 1-5BV/h, calcium, magnesium and other ions are deeply removed, and the content of calcium and magnesium is reduced to be less than 0.05mg/L. And (3) after removing impurities by the softened ion exchange resin column, pumping the liquid into a nanofiltration device 3, discharging concentrated water (with the salinity of 70-100 g/L) obtained by nanofiltration into a salt lake, pumping the obtained produced water into a reverse osmosis device 4 to be concentrated to the required concentration, and returning the produced water of the reverse osmosis device 4 to a regulating tank 1. A small part of the concentrated water of the reverse osmosis device 4 can be used as a desorbent of the softened ion exchange resin column, and most of the concentrated water is pumped into a refined brine tank 5 to obtain qualified refined brine, wherein the content of calcium and magnesium is lower than 0.5mg/L, and the requirement of bipolar membrane feeding standard is met.
Example 2
A sodium sulfate subtype salt lake in Tibet has the chloride ion content of 20g/L, the sulfate radical content of 15g/L, the lithium content of 0.45g/L, the calcium and magnesium content of 0.12g/L and the pH value of 9.8.
Pumping lake brine into a regulating tank 1, adding produced water of a reverse osmosis device 4 and externally-supplied pure water into the regulating tank to dilute the lake brine to the salinity of 18g/L, uniformly mixing the water and the externally-supplied pure water, then feeding the mixture into a softened ion exchange resin column, wherein the flow rate of pumping the lake brine into the softened ion exchange resin column is 2BV/h, and the concentration of calcium and magnesium in effluent is 0.04mg/L. And (3) after removing impurities from the softened ion exchange resin column, pumping the liquid into a nanofiltration device 3, discharging concentrated water obtained by nanofiltration to a salt lake, pumping the obtained produced water into a reverse osmosis device 4, concentrating the obtained produced water to 80g/L, and returning the produced water of the reverse osmosis device 4 to the regulating tank 1. A small part of the concentrated water obtained by the reverse osmosis device is used as a desorbent of the softened resin, and most of the concentrated water is pumped into a refined brine tank 5 to obtain qualified refined brine. Meets the feeding standard requirement of the bipolar membrane. The indexes in this example are shown in table 1.
TABLE 1
Example 3
35g/L of chloride ions, 10g/L of sulfate radicals, 0.78g/L of lithium, 0.06g/L of calcium and magnesium and 9.5 of pH in a certain carbonate type salt lake in Xinjiang.
Pumping lake brine into a regulating tank 1, adding produced water of a reverse osmosis device 4 and externally-supplied pure water into the regulating tank to dilute the lake brine to 18g/L of salinity, uniformly mixing the water and the externally-supplied pure water, and then feeding the mixture into a softened ion exchange resin column, wherein the pumping flow rate is 5BV, and the calcium and magnesium concentration of effluent is 0.02mg/L. And (3) after removing impurities from the softened ion exchange resin column, pumping the liquid into a nanofiltration device 3, discharging concentrated water obtained by nanofiltration to a salt lake, pumping the obtained produced water into a reverse osmosis device 4, concentrating to 95g/L, and returning the produced water of the reverse osmosis device 4 to the regulating tank 1. A small part of the concentrated water of the reverse osmosis device is used as a desorbent of the softened ion exchange resin column, and most of the concentrated water is pumped into the refined brine tank 5 to obtain qualified refined brine. Meets the feeding standard requirement of the bipolar membrane. The indexes of the present embodiment are shown in table 2.
TABLE 2
Various corresponding changes and modifications can be made by those skilled in the art according to the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (3)
1. A device for refining salt water from lake brine by a non-chemical method is characterized by comprising a regulating tank (1), a resin column (2), a nanofiltration device (3), a reverse osmosis device (4) and a refined salt water tank (5); the adjusting tank (1), the resin column (2) and the nanofiltration device (3) are sequentially communicated, a water production outlet of the nanofiltration device (3) is communicated with an inlet of the reverse osmosis device (4), and a concentrated water outlet of the reverse osmosis device (4) is communicated with the refined salt water tank (5).
2. The apparatus for non-chemical purification of brine from lake brine according to claim 1, wherein the water production outlet of the reverse osmosis device (4) is connected to the conditioning tank (1).
3. The apparatus for non-chemical purification of brine from lake brine according to claim 1, wherein the resin column (2) is a softened ion exchange resin column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222974163.2U CN218709421U (en) | 2022-11-09 | 2022-11-09 | Device for refining salt water from lake brine by non-chemical method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222974163.2U CN218709421U (en) | 2022-11-09 | 2022-11-09 | Device for refining salt water from lake brine by non-chemical method |
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| CN218709421U true CN218709421U (en) | 2023-03-24 |
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| CN202222974163.2U Active CN218709421U (en) | 2022-11-09 | 2022-11-09 | Device for refining salt water from lake brine by non-chemical method |
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| CN (1) | CN218709421U (en) |
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- 2022-11-09 CN CN202222974163.2U patent/CN218709421U/en active Active
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