CN216918668U - Solar low-temperature evaporation system for salt lake water - Google Patents
Solar low-temperature evaporation system for salt lake water Download PDFInfo
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- CN216918668U CN216918668U CN202220418992.XU CN202220418992U CN216918668U CN 216918668 U CN216918668 U CN 216918668U CN 202220418992 U CN202220418992 U CN 202220418992U CN 216918668 U CN216918668 U CN 216918668U
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- 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
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
Abstract
The utility model provides a solar low-temperature evaporation system for salt lake water, which comprises: a refrigeration device, a solar heating device and a low-temperature evaporation device; the solar low-temperature evaporation system uses solar energy as a heat source for low-temperature evaporation, so that carbon emission can be effectively reduced, and the cost is reduced; the low-temperature evaporation technology is used, the concentration speed of the salt lake old brine is artificially improved, and the production period can be shortened by over 70 percent; the salt lake water can separate out crystal salt in the evaporation concentration process, and the crystal salt with higher purity can be collected through accurate adjustment due to different salt content and different solubility of different salts in the salt lake water, so that the comprehensive utilization of byproducts is realized.
Description
Technical Field
The utility model relates to the field of water treatment, in particular to a solar low-temperature evaporation system for salt lake water.
Background
Lithium mineral resources in China mainly exist in the form of salt lake brine, and compared with the extraction of lithium from ores, the extraction of lithium from salt lakes has the advantages of low cost, small influence on the environment, relatively simple process and the like, and the development of the technology for extracting lithium from salt lakes is very important.
The concentration of lithium ions in the salt lake water is relatively low, and the operations of impurity removal, lithium precipitation and the like can be further carried out after enrichment through the steps of evaporation, concentration and the like; in the prior art, the evaporation pond is mainly used for evaporation concentration of lake water, and taking the Qinghai area as an example, the aged brine needs years for sunning, so that the efficiency is low, the time consumption is long, the evaporation process cannot be accurately controlled, and the by-products of evaporation crystallization cannot be effectively recovered; the traditional low-temperature evaporation equipment has high energy consumption, and the heat source can bring carbon emission, so the low-temperature evaporation equipment is not friendly to the environment.
Therefore, there is a need for a solar low temperature evaporation system for salt lake water.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a solar low-temperature evaporation system for salt lake water, which aims at overcoming the defects in the prior art and uses solar energy as a heat source to evaporate and concentrate the salt lake water by using low-temperature evaporation equipment.
In order to achieve the purpose, the utility model adopts the technical scheme that:
provided is a solar low temperature evaporation system for salt lake water, comprising: a refrigeration device, a solar heating device and a low-temperature evaporation device; wherein the content of the first and second substances,
the freezing device includes: the system comprises a first heat exchanger, a second heat exchanger, a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; the liquid inlet end of the first pipeline is connected with the liquid outlet end of the salt lake water tank, and the liquid outlet end of the first pipeline is connected with the first liquid inlet end of the first heat exchanger; the liquid inlet end of the third pipeline is connected with the second liquid outlet end of the first heat exchanger, and the liquid outlet end of the third pipeline is connected with the first liquid inlet end of the second heat exchanger; an expansion valve is arranged on the third pipeline; a liquid inlet end of the fourth pipeline is connected with a first liquid outlet end of the second heat exchanger, and a liquid outlet end of the fourth pipeline is connected with a second liquid inlet end of the first heat exchanger; a compressor is arranged on the fourth pipeline; refrigerants are arranged in the third pipeline and the fourth pipeline;
the solar heating apparatus includes: the system comprises a third heat exchanger, a heat conduction oil cache tank, a solar heat collector, a sixth pipeline, a seventh pipeline, an eighth pipeline and a ninth pipeline; the liquid inlet end of the sixth pipeline is connected with the liquid outlet end of the heat conduction oil cache tank, and the liquid outlet end of the sixth pipeline is connected with the liquid inlet end of the solar heat collector; the liquid inlet end of the seventh pipeline is connected with the liquid outlet end of the solar heat collector, and the liquid outlet end of the seventh pipeline is connected with the first liquid inlet end of the third heat exchanger; the liquid inlet end of the eighth pipeline is connected with the first liquid outlet end of the third heat exchanger, and the liquid outlet end of the eighth pipeline is connected with the liquid inlet end of the heat conduction oil cache tank;
the low-temperature evaporation device comprises: the system comprises an evaporation kettle, a blower, a tenth pipeline, an eleventh pipeline, a twelfth pipeline and a thirteenth pipeline; the air inlet end of the tenth pipeline is connected with the air outlet end of the blower, and the air outlet end of the tenth pipeline is connected with the air inlet end of the evaporation kettle; the feed end of the eleventh pipeline is connected with the discharge end of the evaporation kettle; the liquid inlet end of the twelfth pipeline is connected with the liquid outlet end of the evaporation kettle, and the liquid outlet end of the twelfth pipeline is connected with the water inlet end of the brine pool;
the liquid inlet end of the second pipeline is connected with the first liquid outlet end of the first heat exchanger, and the liquid outlet end of the second pipeline is connected with the second liquid inlet end of the third heat exchanger; the liquid inlet end of the ninth pipeline is connected with the second liquid outlet end of the third heat exchanger, and the liquid outlet end of the ninth pipeline is connected with the liquid inlet end of the evaporation kettle; and the gas outlet end of the thirteenth pipeline is connected with the second gas inlet end of the second heat exchanger.
Preferably, a conveying pump and a cartridge filter are sequentially arranged on the first pipeline from the liquid outlet end of the salt lake water tank to the first liquid inlet end of the first heat exchanger.
Preferably, the freezing apparatus further comprises: a fifth pipeline and a fourteenth pipeline; the air inlet end of the fifth pipeline is connected with the second air outlet end of the second heat exchanger, and the air outlet end of the fifth pipeline is connected with the air inlet end of the blower; the liquid inlet end of the fourteenth pipeline is connected with the middle part of the fifth pipeline, and the liquid outlet end of the fourteenth pipeline is connected with the water inlet end of the condensed water cache tank.
Preferably, a heat conduction oil pump is arranged on the sixth pipeline; and the seventh pipeline is provided with a regulating valve.
Preferably, the solar collector is selected from a trough tracking collector, a evacuated tube collector, a linear fresnel concentrator, a fixed CPC collector or a flat panel collector.
Preferably, the first heat exchanger, the second heat exchanger and the third heat exchanger are independently selected from a plate heat exchanger or a shell and tube heat exchanger.
Preferably, an electric valve is arranged on the eleventh pipeline.
Preferably, a drain pump is arranged on the twelfth pipeline.
Preferably, a medium is arranged in the evaporation kettle, and the medium is selected from a cloth curtain or a paper core.
By adopting the technical scheme, compared with the prior art, the utility model has the following technical effects:
firstly, solar energy is used as a heat source for low-temperature evaporation, so that carbon emission can be effectively reduced, and the cost is reduced;
secondly, a low-temperature evaporation technology is used, the concentration speed of the old brine of the salt lake is artificially improved, and the production period can be shortened by over 70 percent;
and thirdly, the salt lake water can separate out crystal salt in the evaporation concentration process, and because the content of different salts in the salt lake water is different, and the solubility of different salts is different, the crystal salt with higher purity can be collected through accurate adjustment, and the comprehensive utilization of byproducts is realized.
Drawings
FIG. 1 is a schematic structural diagram of a solar low-temperature evaporation system according to the present invention;
the reference numerals in the figures include:
a delivery pump 1; a cartridge filter 2; a refrigerating device 3; a first heat exchanger 31; a second heat exchanger 32; a compressor 33; an expansion pump 34; a first pipe 35; a second conduit 36; a third line 37; a fourth line 38; a fifth pipeline 39; a fourteenth line 310; a solar heating device 4; a third heat exchanger 41; a conduction oil buffer tank 42; a solar heat collector 43; a heat-conductive oil pump 44; an adjusting valve 45; a sixth pipeline 46; a seventh pipe 47; an eighth conduit 48; a ninth conduit 49; a low-temperature evaporation device 5; an evaporation vessel 51; a blower 52; an electrically operated valve 53; a tenth conduit 54; an eleventh line 55; a twelfth line 56; a thirteenth line 57; and a liquid discharge pump 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The utility model is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Example 1
As shown in fig. 1, the present embodiment provides a solar low temperature evaporation system for salt lake water, comprising: a refrigeration device 3, a solar heating device 4, and a low-temperature evaporation device 5; wherein the content of the first and second substances,
the refrigerating apparatus 3 includes: a first heat exchanger 31, a second heat exchanger 32, a first pipe 35, a second pipe 36, a third pipe 37, and a fourth pipe 38; the liquid inlet end of the first pipeline 35 is connected with the liquid outlet end of the salt lake water tank, and the liquid outlet end of the first pipeline 35 is connected with the first liquid inlet end of the first heat exchanger 31; a conveying pump 1 and a security filter 2 are sequentially arranged on the first pipeline 35 from the liquid outlet end of the salt lake water tank to the first liquid inlet end of the first heat exchanger 31; the liquid inlet end of the third pipeline 37 is connected with the second liquid outlet end of the first heat exchanger 31, and the liquid outlet end of the third pipeline 37 is connected with the first liquid inlet end of the second heat exchanger 32; an expansion valve 34 is arranged on the third pipeline 37; the liquid inlet end of the fourth pipeline 38 is connected with the first liquid outlet end of the second heat exchanger 32, and the liquid outlet end of the fourth pipeline 38 is connected with the second liquid inlet end of the first heat exchanger 31; a compressor 33 is arranged on the fourth pipeline 38; refrigerants are arranged in the third pipeline 37 and the fourth pipeline 38;
the refrigerating apparatus 3 further includes: fifth and fourteenth lines 39, 310; an air inlet end of the fifth pipeline 39 is connected with a second air outlet end of the second heat exchanger 32, and an air outlet end of the fifth pipeline 39 is connected with an air inlet end of the blower 52; the liquid inlet end of the fourteenth pipeline 310 is connected with the middle part of the fifth pipeline 39, and the liquid outlet end of the fourteenth pipeline 310 is connected with the water inlet end of the condensed water cache tank;
the solar heating device 4 comprises: a third heat exchanger 41, a conduction oil cache tank 42, a solar heat collector 43, a sixth pipeline 46, a seventh pipeline 47, an eighth pipeline 48 and a ninth pipeline 49; the solar thermal collector 43 is a trough-type tracking thermal collector; the liquid inlet end of the sixth pipeline 46 is connected with the liquid outlet end of the heat conduction oil cache tank 42, and the liquid outlet end of the sixth pipeline 46 is connected with the liquid inlet end of the solar heat collector 43; a heat-conducting oil pump 44 is arranged on the sixth pipeline 46; the liquid inlet end of the seventh pipeline 47 is connected with the liquid outlet end of the solar heat collector 43, and the liquid outlet end of the seventh pipeline 47 is connected with the first liquid inlet end of the third heat exchanger 41; the seventh pipeline 47 is provided with an adjusting valve 45; a liquid inlet end of the eighth pipeline 48 is connected with a first liquid outlet end of the third heat exchanger 41, and a liquid outlet end of the eighth pipeline 48 is connected with a liquid inlet end of the heat transfer oil cache tank 42;
the low-temperature evaporation device 5 includes: an evaporator 51, a blower 52, a tenth pipe 54, an eleventh pipe 55, a twelfth pipe 56, and a thirteenth pipe 57; a medium is arranged in the evaporation kettle 51, and the medium is a cloth curtain; the gas inlet end of the tenth pipeline 54 is connected with the gas outlet end of the blower 52, and the gas outlet end of the tenth pipeline 54 is connected with the gas inlet end of the evaporation kettle 51; the feed end of the eleventh pipeline 55 is connected with the discharge end of the evaporation kettle 51; an electric valve 53 is arranged on the eleventh pipeline 55; a liquid inlet end of the twelfth pipeline 56 is connected with a liquid outlet end of the evaporation kettle 51, and a liquid outlet end of the twelfth pipeline 56 is connected with a water inlet end of a brine pool; a liquid discharge pump 6 is arranged on the twelfth pipeline 56;
the liquid inlet end of the second pipeline 36 is connected with the first liquid outlet end of the first heat exchanger 31, and the liquid outlet end of the second pipeline 36 is connected with the second liquid inlet end of the third heat exchanger 41; a liquid inlet end of the ninth pipeline 49 is connected with a second liquid outlet end of the third heat exchanger 41, and a liquid outlet end of the ninth pipeline 49 is connected with a liquid inlet end of the evaporation kettle 51; the gas inlet end of the thirteenth pipeline 57 is connected with the gas outlet end of the evaporation kettle 51, and the gas outlet end of the thirteenth pipeline 57 is connected with the second gas inlet end of the second heat exchanger 32; the first heat exchanger 31, the second heat exchanger 32, and the third heat exchanger 41 are all plate heat exchangers.
Example 2
The embodiment provides specific implementation steps of a solar low-temperature evaporation system for salt lake water, which comprise the following steps:
(1) the pretreated salt lake water enters the first heat exchanger 31 through the first pipeline 35, and the refrigerant is driven by the compressor 33 to release heat at the first heat exchanger 31 to primarily heat the salt lake water, and meanwhile, the salt lake water is primarily heated into medium-temperature salt lake water;
(2) solar energy is used as a heat source, heat conducting oil is continuously circulated under the driving of a heat conducting oil pump 44, and enters a third heat exchanger 41 after the temperature of the interior of the groove type tracking heat collector is raised, so that the water of the medium-temperature salt lake is heated; the medium temperature salt lake water enters a third heat exchanger 41 to exchange heat with high temperature heat conduction oil, and the salt lake water is heated into high temperature salt lake water; the temperature of the high-temperature salt lake water is kept between 60 and 80 ℃;
(3) the high-temperature salt lake water enters from the liquid inlet end at the upper part of the evaporation kettle 51, drops on the cloth curtain and slowly flows downwards on the cloth curtain, and the cloth curtain can greatly increase the evaporation area of the high-temperature salt lake water and accelerate the evaporation speed; the dry air is blown into the evaporation kettle 51 under the drive of the blower 52 and flows from bottom to top, the dry air flows through the surface of the cloth curtain and takes away a large amount of water vapor, the water is led out from the air outlet end at the upper part of the evaporation kettle 51, and the salt lake water is evaporated at low temperature in the process;
(4) after the high-temperature salt lake water is evaporated, partial crystallized salt is separated out, the electric valve 53 is opened according to set time, and the crystallized salt with higher purity can be discharged from the discharge end at the bottom of the evaporation kettle 51, and the process can be accurately controlled, so that the recovery of the crystallized salt at different evaporation stages is realized; the concentration of lithium ions in the concentrated brine is greatly increased, and the brine after evaporation and concentration is conveyed to the next process of lithium extraction by a liquid discharge pump 6;
(5) the air rich in water vapor is led out from the air outlet end at the upper part of the evaporation kettle 51, enters the second heat exchanger 32 for heat exchange and temperature reduction, the refrigerant enters the second heat exchanger 32 after passing through the expansion valve 34, is gasified to absorb heat, reduces the temperature of the air carrying a large amount of water vapor, and the water vapor is condensed into condensed water to be recycled for later use; the dried air re-enters the air inlet end of the blower 52 for recycling.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (9)
1. A solar cryogenic evaporation system for salt lake water, comprising: a refrigeration device (3), a solar heating device (4) and a low-temperature evaporation device (5); wherein the content of the first and second substances,
the freezing device (3) comprises: a first heat exchanger (31), a second heat exchanger (32), a first conduit (35), a second conduit (36), a third conduit (37) and a fourth conduit (38); the liquid inlet end of the first pipeline (35) is connected with the liquid outlet end of the salt lake water tank, and the liquid outlet end of the first pipeline (35) is connected with the first liquid inlet end of the first heat exchanger (31); the liquid inlet end of the third pipeline (37) is connected with the second liquid outlet end of the first heat exchanger (31), and the liquid outlet end of the third pipeline (37) is connected with the first liquid inlet end of the second heat exchanger (32); an expansion valve (34) is arranged on the third pipeline (37); the liquid inlet end of the fourth pipeline (38) is connected with the first liquid outlet end of the second heat exchanger (32), and the liquid outlet end of the fourth pipeline (38) is connected with the second liquid inlet end of the first heat exchanger (31); a compressor (33) is arranged on the fourth pipeline (38); refrigerants are arranged in the third pipeline (37) and the fourth pipeline (38);
the solar heating device (4) comprises: the system comprises a third heat exchanger (41), a heat conduction oil cache tank (42), a solar heat collector (43), a sixth pipeline (46), a seventh pipeline (47), an eighth pipeline (48) and a ninth pipeline (49); the liquid inlet end of the sixth pipeline (46) is connected with the liquid outlet end of the heat conduction oil cache tank (42), and the liquid outlet end of the sixth pipeline (46) is connected with the liquid inlet end of the solar heat collector (43); the liquid inlet end of the seventh pipeline (47) is connected with the liquid outlet end of the solar heat collector (43), and the liquid outlet end of the seventh pipeline (47) is connected with the first liquid inlet end of the third heat exchanger (41); the liquid inlet end of the eighth pipeline (48) is connected with the first liquid outlet end of the third heat exchanger (41), and the liquid outlet end of the eighth pipeline (48) is connected with the liquid inlet end of the heat conduction oil cache tank (42);
the low-temperature evaporation device (5) comprises: an evaporation kettle (51), a blower (52), a tenth pipeline (54), an eleventh pipeline (55), a twelfth pipeline (56) and a thirteenth pipeline (57); the gas inlet end of the tenth pipeline (54) is connected with the gas outlet end of the blower (52), and the gas outlet end of the tenth pipeline (54) is connected with the gas inlet end of the evaporation kettle (51); the feed end of the eleventh pipeline (55) is connected with the discharge end of the evaporation kettle (51); the liquid inlet end of the twelfth pipeline (56) is connected with the liquid outlet end of the evaporation kettle (51), and the liquid outlet end of the twelfth pipeline (56) is connected with the water inlet end of the brine pool;
the liquid inlet end of the second pipeline (36) is connected with the first liquid outlet end of the first heat exchanger (31), and the liquid outlet end of the second pipeline (36) is connected with the second liquid inlet end of the third heat exchanger (41); the liquid inlet end of the ninth pipeline (49) is connected with the second liquid outlet end of the third heat exchanger (41), and the liquid outlet end of the ninth pipeline (49) is connected with the liquid inlet end of the evaporation kettle (51); the gas inlet end of the thirteenth pipeline (57) is connected with the gas outlet end of the evaporation kettle (51), and the gas outlet end of the thirteenth pipeline (57) is connected with the second gas inlet end of the second heat exchanger (32).
2. The solar low-temperature evaporation system as claimed in claim 1, wherein a transfer pump (1) and a security filter (2) are sequentially arranged on the first pipeline (35) from the liquid outlet end of the salt lake water tank to the first liquid inlet end of the first heat exchanger (31).
3. Solar cryogenic evaporation system according to claim 1, characterized in that the freezing device (3) further comprises: a fifth line (39) and a fourteenth line (310); the air inlet end of the fifth pipeline (39) is connected with the second air outlet end of the second heat exchanger (32), and the air outlet end of the fifth pipeline (39) is connected with the air inlet end of the blower (52); the liquid inlet end of the fourteenth pipeline (310) is connected with the middle part of the fifth pipeline (39), and the liquid outlet end of the fourteenth pipeline (310) is connected with the water inlet end of the condensed water cache tank.
4. The solar cryogenic evaporation system of claim 1, wherein a heat conducting oil pump (44) is provided on the sixth pipeline (46); and the seventh pipeline (47) is provided with a regulating valve (45).
5. Solar cryogenic evaporation system according to claim 1, characterized in that the solar collector (43) is selected from trough tracking collectors, evacuated tube collectors, linear fresnel concentrators, fixed CPC collectors or flat plate collectors.
6. Solar cryogenic evaporation system according to claim 1, characterised in that the first heat exchanger (31), the second heat exchanger (32) and the third heat exchanger (41) are independently selected from a plate heat exchanger or a shell and tube heat exchanger.
7. Solar cryogenic evaporation system according to claim 1, characterised in that an electrically operated valve (53) is provided on the eleventh pipe (55).
8. Solar cryogenic evaporation system according to claim 1, characterised in that a drain pump (6) is provided on the twelfth pipe (56).
9. The solar cryogenic evaporation system of claim 1, wherein a medium is provided in the evaporation kettle (51), and the medium is selected from a cloth curtain or a paper core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220418992.XU CN216918668U (en) | 2022-02-28 | 2022-02-28 | Solar low-temperature evaporation system for salt lake water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220418992.XU CN216918668U (en) | 2022-02-28 | 2022-02-28 | Solar low-temperature evaporation system for salt lake water |
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| CN216918668U true CN216918668U (en) | 2022-07-08 |
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| CN202220418992.XU Active CN216918668U (en) | 2022-02-28 | 2022-02-28 | Solar low-temperature evaporation system for salt lake water |
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- 2022-02-28 CN CN202220418992.XU patent/CN216918668U/en active Active
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