CN218989354U - Device for extracting lithium from salt lake by electrochemical method - Google Patents
Device for extracting lithium from salt lake by electrochemical method Download PDFInfo
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- CN218989354U CN218989354U CN202223154011.4U CN202223154011U CN218989354U CN 218989354 U CN218989354 U CN 218989354U CN 202223154011 U CN202223154011 U CN 202223154011U CN 218989354 U CN218989354 U CN 218989354U
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Abstract
The application provides a device for extracting lithium from salt lake by an electrochemical method. The device for extracting lithium from the salt lake by the electrochemical method comprises a membrane stack bracket and a lithium extracting unit. The lithium extraction unit comprises N anion exchange membranes and 2N lithium extraction components. The baffle and the electrode plate interval connect in the relative both sides of installing frame and form sealed reaction chamber, conductive support piece sets up in sealed reaction chamber, and conductive support piece is connected with baffle and electrode plate respectively, 2N carries lithium subassembly to stack in proper order and arranges on the membrane heap support, the baffle of two first and last carry lithium subassembly all with membrane heap support connection each anion exchange membrane clamp locate between the electrode plate of two adjacent carry lithium subassembly, and each anion exchange membrane is connected with the periphery of the electrode plate of two adjacent carry lithium subassembly respectively and every adjacent two carry lithium subassembly insert conductive support piece on the baffle be connected. The device for extracting lithium from the salt lake by the electrochemical method has the advantages of simple wiring structure, high current efficiency, small occupied area, high lithium extraction efficiency and higher use safety.
Description
Technical Field
The utility model relates to the technical field of lithium resource extraction, in particular to a device for extracting lithium from salt lake by an electrochemical method.
Background
Lithium metal has the characteristics of light specific gravity, strong chemical activity and the like, and lithium and various compounds thereof have wide application in modern industry, particularly in the high-tech field, are important materials in the high-tech field, and are increasingly widely applied in civil industry besides the applications of atomic energy, aerospace and national defense industry due to the excellent characteristics, and are also called as "energy metal" and "elements pushing the world to advance" once.
Over 70% of the world lithium resource industrial reserves come from salt lakes, and along with the promotion of new energy automobiles, the demand of lithium is accelerated to increase, so that the lithium extraction of the salt lakes is more concerned, and the world lithium resources of the salt lakes are mainly distributed in south america, north america and asia; salt lake regions are often sparsely populated, infrastructure is not perfect, energy supply is insufficient, fresh water resources are insufficient, and therefore serious restrictions are brought to development and utilization of the lithium resources. The method for extracting lithium from the salt lake mainly comprises a plurality of methods such as an evaporation crystallization method, a precipitation method, an extraction method, an adsorption method, a calcination method, a membrane separation method, an electrochemical deintercalation method and the like.
The electrochemical deintercalation method is a currently emerging method for directly extracting lithium from brine, and utilizes the principle of a lithium battery, lithium ions are adsorbed in a cathode chamber by utilizing a cathode, lithium ions are deintercalated in an anode chamber by utilizing an anode, and the lithium ions are prevented from entering the cathode chamber from the anode chamber by utilizing an anion exchange membrane, so that the enrichment of the lithium ions in the anode chamber is achieved, compared with the traditional evaporative crystallization method or precipitation method, the recovery rate is only 40% -50%, the recovery rate is higher and is more than 90%, the production period can be greatly shortened, the enriched lithium chloride can be directly extracted from salt lake brine, the high-concentration lithium-enriched concentrated solution is obtained, other impurities are effectively separated, and the lithium extraction in salt lake in the future is greatly available. The patent CN102049237A discloses an iron phosphate ion sieve for selectively extracting lithium and an application device thereof, wherein iron phosphate is used as a negative electrode, lithium iron phosphate is used as a positive electrode, and lithium ions are directly extracted from salt lake brine by an electrodeintercalation method to obtain a lithium-rich liquid; patent "CN112030007A" discloses an electrochemical deintercalation method salt lake draws lithium with taking off caulking groove cell body structure, has proposed an electric deintercalation method and has carried a structure of lithium device, through the parallelly connected combination of positive negative pole taking off caulking groove and diaphragm, can assemble the large-scale electric deintercalation membrane stack with the electric deintercalation module of single group, area is little, convenient operation, but above patent all is the extraction lithium ion that realizes through the membrane stack of parallelly connected combination, the wiring is complicated, needs to throw into more rectifying device, the current efficiency is low, the heat that produces is also very high, the potential safety hazard is great.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide the device for extracting lithium from the salt lake by an electrochemical method, which has the advantages of simple wiring structure, high current efficiency, small occupied area, high lithium extraction efficiency and high use safety.
The aim of the utility model is realized by the following technical scheme:
the device for extracting lithium from salt lake by electrochemical method comprises a membrane stack bracket and a lithium extracting unit, wherein the lithium extracting unit comprises:
n anion exchange membranes;
2N carry lithium subassembly, every carry lithium subassembly includes baffle, installing frame, electrically conductive support piece and electrode plate, the baffle with the electrode plate interval connect in the opposite both sides of installing frame form sealed reaction chamber, electrically conductive support piece sets up in the sealed reaction chamber, just electrically conductive support piece respectively with the baffle with the electrode plate is connected, and electrically conductive support piece inserts in on the baffle, 2N carry lithium subassembly in proper order cascade arrangement in on the membrane pile support, the head and the tail two carry lithium subassembly the baffle all with membrane pile support connection, and the head and the tail two carry lithium subassembly insert in electrically conductive support piece on the baffle is used for respectively with the power electricity is connected, each anion exchange membrane presss from both sides locates adjacent two electrode plates carry lithium subassembly between, and each anion exchange membrane respectively with adjacent two carry lithium subassembly carry the periphery of lithium subassembly to be connected, remaining two adjacent two carry lithium subassembly the baffle corresponds the setting, and each adjacent two carry lithium subassembly insert in on the electrically conductive support piece.
In one embodiment, the membrane stack support comprises a membrane stack seat and a movable supporting seat, the membrane stack seat is movably connected with the movable supporting seat to form a folding area, the movable supporting seat slides towards a direction close to or far away from the membrane stack seat, 2N lithium extraction components and N anion exchange membranes are stacked and arranged in the folding Zhang Ou, the partition board of the first lithium extraction component or the last lithium extraction component is connected with the membrane stack support, and 2N lithium extraction components and N anion exchange membranes are clamped between the membrane stack seat and the movable supporting seat together.
In one embodiment, the separator of each two adjacent lithium extraction components is an integrally formed structure.
In one embodiment, a sealing ring is disposed on the mounting frame of each lithium extraction component, the sealing ring of each lithium extraction component is wound around the periphery of the corresponding electrode plate, and the sealing rings of every two adjacent lithium extraction components are respectively and tightly connected with the corresponding anion exchange membrane.
In one embodiment, at least one cross rod is arranged in the membrane stack bracket, and the cross rod is detachably connected with the membrane stack bracket; at least one hanging piece is arranged on the outer side of the installation frame of each lithium lifting assembly, and the cross rod sequentially penetrates through the hanging pieces of the installation frame of each lithium lifting assembly.
In one embodiment, the mounting frame is an integrally formed corrosion resistant metal frame.
In one embodiment, the mounting frame comprises an integrally formed metal frame and a corrosion-resistant metal coating, and the corrosion-resistant metal coating is coated on the integrally formed metal frame.
In one embodiment, the mounting frame is an integrally formed gold frame.
In one embodiment, the mounting frame is an integrally formed silver frame.
In one embodiment, the mounting frame is an integrally formed nickel frame.
In one embodiment, the mounting frame is an integrally formed titanium frame.
In one embodiment, the mounting frame is a metal frame integrally formed with gold plating on a surface.
In one embodiment, the mounting frame is a silver-plated integrally formed metal frame.
In one embodiment, the mounting frame is a surface nickel plated integrally formed metal frame.
In one embodiment, the mounting frame is a surface titanized integrally formed metal frame.
In one embodiment, N electrode plates in the 2N lithium extraction assemblies include positive electrode metal meshes and first phosphate layers, the periphery of the positive electrode metal mesh of each electrode plate is connected with the mounting frame, and the positive electrode metal mesh of each electrode plate penetrates through the corresponding first phosphate layer;
the rest N electrode plates in the 2N lithium extraction components comprise a negative metal net and a second phosphate layer, the periphery of the negative metal net of each electrode plate is connected with the mounting frame, and the negative metal net of each electrode plate penetrates through the corresponding second phosphate layer;
each anion exchange membrane is clamped between the first phosphate layer of the electrode plate of each lithium extraction component and the second phosphate layer of the electrode plate of the adjacent lithium extraction component, and is respectively connected with the periphery of the positive electrode metal net of the electrode plate of each lithium extraction component and the periphery of the negative electrode metal net of the electrode plate of the adjacent lithium extraction component;
wherein the first phosphate layer is a lithium iron phosphate layer, a lithium vanadium phosphate layer, a lithium manganese phosphate layer or a lithium nickel phosphate layer; the second phosphate layer is an iron phosphate ion screen layer, a nickel phosphate ion screen layer, a manganese phosphate ion screen layer or a nickel phosphate ion screen layer.
In one embodiment, a sealing ring is disposed on the mounting frame of each lithium extraction component, the sealing ring of each lithium extraction component is wound around the periphery of the corresponding electrode plate, and the sealing rings of every two adjacent lithium extraction components are respectively and tightly connected with the corresponding anion exchange membrane.
In one embodiment, at least one first diversion hole and at least one second diversion hole are respectively formed on two opposite sides of the installation frame of each lithium extraction component, and the first diversion hole and the second diversion hole are communicated with the sealed reaction chamber.
In one embodiment, the number of the first diversion holes of the mounting frame of each lithium extraction component is not more than 10, and the plurality of the first diversion holes of the mounting frame of each lithium extraction component are all arranged on one side of the corresponding mounting frame;
the number of the second guide holes of the mounting frame of each lithium extraction component is not more than 10, and the second guide holes of the mounting frame of each lithium extraction component are formed in one side of the corresponding mounting frame.
In one embodiment, the inner diameter of the first and second guide holes of the mounting frame of each lithium extraction assembly is 0.3cm to 0.5cm.
Compared with the prior art, the utility model has at least the following advantages:
according to the device for extracting lithium from the salt lake by the electrochemical method, the separation plates of the first and the last lithium extraction components are connected with the membrane pile support, the separation plates of the other two adjacent lithium extraction components are correspondingly arranged, the conductive support pieces embedded on the separation plates of the other two adjacent lithium extraction components are respectively connected with the power supply, each anion exchange membrane is clamped between the electrode plates of the other two lithium extraction components, each anion exchange membrane is respectively connected with the periphery of the electrode plates of the other two lithium extraction components, namely, the even and the odd lithium extraction components and the anion exchange membranes between the even and the odd lithium extraction components form a lithium extraction unit together, the distance between the electrode plates is only the thickness of the anion exchange membrane, the lithium ion migration efficiency is higher, the energy consumption of extracting lithium is reduced, in addition, the conductive support pieces embedded on the separation plates of the first and the last lithium extraction components are respectively connected with the power supply, namely, each lithium extraction unit is connected in series through the conductive support pieces, so that the device for extracting lithium from the salt lake is simple, the lithium extraction efficiency is high, the current occupation ratio is small, and the safety is high, and the safety is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electrochemical salt lake lithium extraction device according to an embodiment of the present utility model;
FIG. 2 is a partial view of the apparatus for extracting lithium from the electrochemical salt lake shown in FIG. 1;
FIG. 3 is another partial view of the electrochemical salt lake lithium extraction of FIG. 1;
FIG. 4 is a partial view of the electrochemical salt lake lithium extraction shown in FIG. 3;
fig. 5 is another partial view of the electrochemical salt lake lithium extraction shown in fig. 3.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The application provides a device for extracting lithium from salt lake by an electrochemical method. The device for extracting lithium from the salt lake by the electrochemical method comprises a membrane stack bracket and a lithium extracting unit, wherein the lithium extracting unit comprises N anion exchange membranes and 2N lithium extracting components. Each lithium lifting component comprises a partition plate, a mounting frame, conductive supporting pieces and electrode plates, wherein the partition plate and the electrode plates are connected to the two opposite sides of the mounting frame at intervals to form a sealed reaction chamber, the conductive supporting pieces are arranged in the sealed reaction chamber and are respectively connected with the partition plate and the electrode plates, the conductive supporting pieces are embedded on the partition plate, 2N lithium lifting components are sequentially arranged on a membrane stack support in a stacked mode, the partition plates of the first lithium lifting component and the second lithium lifting component are connected with the membrane stack support, the conductive supporting pieces of the first lithium lifting component and the second lithium lifting component are respectively used for being electrically connected with a power supply, each anion exchange membrane is clamped between the electrode plates of the two adjacent lithium lifting components, each anion exchange membrane is respectively connected with the peripheries of the electrode plates of the two adjacent lithium lifting components, the rest partition plates of the two adjacent lithium lifting components are correspondingly arranged, and the conductive supporting pieces of the two adjacent lithium lifting components are embedded on the partition plates.
According to the device for extracting lithium from the salt lake by the electrochemical method, the separation plates of the first lithium extraction component and the second lithium extraction component are connected with the membrane pile support, the separation plates of the remaining adjacent two lithium extraction components are correspondingly arranged, the conductive support pieces embedded on the separation plates of the adjacent two lithium extraction components are respectively connected with the power supply, each anion exchange membrane is clamped between the electrode plates of the adjacent two lithium extraction components, each anion exchange membrane is respectively connected with the periphery of the electrode plates of the adjacent two lithium extraction components, namely, the even number and the odd number of lithium extraction components and the anion exchange membranes between the even number and the odd number of lithium extraction components form lithium extraction units together, the distance between the electrode plates is only the thickness of the anion exchange membranes, the lithium ion migration efficiency is higher, the energy consumption of extracting lithium is reduced, in addition, the conductive support pieces embedded on the separation plates of the first lithium extraction component and the second lithium extraction component are respectively connected with the power supply, namely, each lithium extraction unit is connected in series through the conductive support pieces, and the lithium extraction units of the adjacent two lithium extraction components are simple in the salt lake, the device has high current extraction efficiency, small occupied area and high safety.
In order to better understand the device for extracting lithium from the electrochemical salt lake of the application, the device for extracting lithium from the electrochemical salt lake of the application is further explained as follows:
referring to fig. 1 to 3, an apparatus 10 for extracting lithium from a salt lake by an electrochemical method according to an embodiment includes a membrane stack support 100 and a lithium extracting unit 200, wherein the lithium extracting unit 200 includes N anion exchange membranes 210 and 2N lithium extracting components 220. Each lithium extraction component 220 comprises a partition plate 221, a mounting frame 222, conductive supporting pieces 223 and electrode plates 224, wherein the partition plates 221 and the electrode plates 224 are connected to opposite sides of the mounting frame 222 at intervals to form a sealed reaction chamber 201, the conductive supporting pieces 223 are arranged in the sealed reaction chamber 201 and are respectively connected with the partition plates 221 and the electrode plates 224, the conductive supporting pieces 223 are embedded on the partition plates 221, 2N lithium extraction components 220 are sequentially stacked and arranged on the membrane stack bracket 100, the partition plates 221 of the first and the last lithium extraction components 220 are connected with the membrane stack bracket 100, the conductive supporting pieces 223 of the first and the last lithium extraction components 220 embedded on the partition plates 221 are respectively used for being electrically connected with a power supply, each anion exchange membrane 210 is clamped between the electrode plates 224 of the adjacent two lithium extraction components 220, each anion exchange membrane 210 is respectively connected with the periphery of the electrode plates 224 of the adjacent two lithium extraction components 220, the partition plates 221 of the rest of the adjacent two lithium extraction components 220 are correspondingly arranged, and the conductive supporting pieces 223 embedded on the partition plates 221 of the adjacent two lithium extraction components 220 are connected.
According to the device 10 for extracting lithium from a salt lake by the electrochemical method, the separator plates 221 of the first and second lithium extraction assemblies 220 are connected with the membrane stack support 100, the separator plates 221 of the remaining two adjacent lithium extraction assemblies 220 are correspondingly arranged, the conductive support members 223 of the two adjacent lithium extraction assemblies 220 embedded on the separator plates 221 are connected, each anion exchange membrane 210 is clamped between the electrode plates 224 of the two adjacent lithium extraction assemblies 220, each anion exchange membrane 210 is respectively connected with the peripheral edges of the electrode plates 224 of the two adjacent lithium extraction assemblies 220, namely, the even and odd lithium extraction assemblies 220 and the anion exchange membranes 210 between the even and odd lithium extraction assemblies form a lithium extraction unit together, the distance between the electrode plates 224 is only the thickness of the anion exchange membrane 210, the lithium ion migration efficiency is higher, the energy consumption for extracting lithium is reduced, in addition, the conductive support members 223 of the first and the tail lithium extraction assemblies 220 embedded on the separator plates 221 are respectively used for being electrically connected with a power supply, the conductive support members 223 of the two adjacent lithium extraction assemblies 220 are connected with the periphery of the electrode plates 224, namely, the lithium extraction unit is formed by the method, and the lithium extraction unit has high current extraction efficiency and the advantages of simple and the electrochemical method, and the device is realized by using the lithium extraction unit.
Referring to fig. 1 to 3, in one embodiment, the membrane stack support 100 includes a membrane stack seat 110 and a movable top seat 120, the membrane stack seat 110 and the movable top seat 120 are movably connected to form a receiving and expanding region 101, the movable top seat 120 slides towards a direction close to or far away from the membrane stack seat 110, 2N lithium extraction components 220 and N anion exchange membranes 210 are stacked and arranged in the receiving and expanding region 101, a separator 221 of the first or last lithium extraction component 220 is connected with the membrane stack support 100, the 2N lithium extraction components 220 and the N anion exchange membranes 210 are clamped between the membrane stack seat 110 and the movable top seat 120, that is, the anion exchange membranes 210 are clamped between electrode plates 224 of the lithium extraction components 220 by the membrane stack seat 110 and the movable top seat 120, so that the structure of the device 10 for extracting lithium from an electrochemical salt lake is further simplified, and the occupation area of the device 10 for extracting lithium from an electrochemical salt lake is small, but the lithium extraction efficiency is high, and the use safety is high.
Referring to fig. 3 to 5, in one embodiment, the separators 221 of each two adjacent lithium extraction assemblies 220 are integrally formed, so that the structure of the device 10 for extracting lithium from the salt lake by electrochemical method is simplified, the connection stability between the lithium extraction assemblies 220 is improved, and the small occupied area of the device 10 for extracting lithium from the salt lake by electrochemical method is ensured, but the lithium extraction efficiency is high, and the use safety is high.
Referring to fig. 3 and 4, in one embodiment, at least one cross bar (not shown) is disposed in the membrane stack support 100, and the cross bar is detachably connected to the membrane stack support 100; the outside of the installation frame 222 of each lithium extraction component 220 is provided with at least one hanging piece 225, and the cross rod sequentially penetrates through the hanging pieces 225 of the installation frame 222 of each lithium extraction component 220, so that the flush stacking setting stability of 2N lithium extraction components 220 is better realized, and the lithium extraction stability of the device 10 for extracting lithium from salt lakes by an electrochemical method is better ensured.
In one embodiment, the mounting frame is an integrally formed corrosion-resistant metal frame, so that the purpose of reducing resistance is achieved, and the structural stability of the mounting frame is ensured.
In one embodiment, the mounting frame comprises an integrally formed metal frame and a corrosion-resistant metal coating, and the corrosion-resistant metal coating is coated on the integrally formed metal frame, so that the purpose of reducing resistance is achieved, and the structural stability of the mounting frame is ensured.
In one embodiment, the mounting frame is an integrally formed gold frame.
In one embodiment, the mounting frame is an integrally formed silver frame.
In one embodiment, the mounting frame is an integrally formed nickel frame.
In one embodiment, the mounting frame is an integrally formed titanium frame.
In one embodiment, the mounting frame is a surface gold plated integrally formed metal frame.
In one embodiment, the mounting frame is a surface silver plated integrally formed metal frame.
In one embodiment, the mounting frame is a surface nickel plated integrally formed metal frame.
In one embodiment, the mounting frame is a surface titanized integrally formed metal frame.
Referring to fig. 4 and fig. 5 together, in one embodiment, N electrode plates 224 in 2N lithium extraction modules 220 include positive electrode metal mesh 2241 and first phosphate layers 2242, the periphery of the positive electrode metal mesh 2241 of each electrode plate 224 is connected with the mounting frame 222, and the positive electrode metal mesh 2241 of each electrode plate 224 is disposed through the corresponding first phosphate layer 2242. Further, the remaining N electrode plates 224 in the 2N lithium extraction assemblies 220 include a negative electrode metal mesh 2243 and a second phosphate layer 2244, the periphery of the negative electrode metal mesh 2243 of each electrode plate 224 is connected with the mounting frame 222, and the negative electrode metal mesh 2243 of each electrode plate 224 is penetrated through the corresponding second phosphate layer 2244. Further, each anion exchange membrane 210 is sandwiched between the first phosphate layer 2242 of the electrode plate 224 of each lithium extraction module 220 and the second phosphate layer 2244 of the electrode plate 224 of the adjacent lithium extraction module 220, and each anion exchange membrane 210 is respectively connected with the periphery of the positive electrode metal mesh 2241 of the electrode plate 224 of each lithium extraction module 220 and the periphery of the negative electrode metal mesh 2243 of the electrode plate 224 of the adjacent lithium extraction module 220. Wherein the first phosphate layer 2242 is a lithium iron phosphate layer, a lithium vanadium phosphate layer, a lithium manganese phosphate layer or a lithium nickel phosphate layer; the second phosphate layer 2244 is an iron phosphate ion sieve layer, a nickel phosphate ion sieve layer, a manganese phosphate ion sieve layer or a nickel phosphate ion sieve layer, and preferably ensures the effectiveness of the even and odd lithium extraction components 220 and the anion exchange membrane 210 between them to form a unit for extracting lithium together. The lithium iron phosphate layer, the lithium vanadium phosphate layer, the lithium manganese phosphate layer or the lithium nickel phosphate layer is a layer structure of common lithium iron phosphate, lithium vanadium phosphate, lithium manganese phosphate or lithium nickel phosphate with a lithium deintercalation function in an electrochemical system; the ferric phosphate ion screen layer is a layer structure formed by oxidizing positive ferrous iron in the lithium iron phosphate into positive ferric iron in an electrochemical system after the potential of the system is regulated by the common lithium iron phosphate, and similarly, the vanadium phosphate ion screen layer, the manganese phosphate ion screen layer or the nickel phosphate ion screen layer are all layer structures formed by oxidizing metal ions of the vanadium phosphate ion screen layer from low valence state to high valence state metal ions in the electrochemical system.
Referring to fig. 1 and fig. 2 together, in one embodiment, a sealing ring (not shown) is disposed on the mounting frame 222 of each lithium extraction component 220, the sealing ring of each lithium extraction component 220 is wound around the periphery of the corresponding electrode plate 224, and the sealing rings of every two adjacent lithium extraction components 220 are respectively tightly connected with the corresponding anion exchange membranes 210, so that the insulating connection of the electrode plates 224 of the two adjacent lithium extraction components 220 is better ensured, the sealing effect of the sealing reaction chamber 201 is better realized, and the lithium extraction effect of the device 10 for extracting lithium from salt lakes by electrochemical methods is better ensured.
Referring to fig. 3 to 5, in one embodiment, at least one first diversion hole 202 and at least one second diversion hole 203 are respectively formed on two opposite sides of the mounting frame 222 of each lithium extraction component 220, and the first diversion hole 202 and the second diversion hole 203 are both communicated with the sealed reaction chamber 201 to dynamically extract lithium from salt lake brine, so as to better ensure the concentration of lithium ions in the salt lake brine in the sealed reaction chamber 201, and further improve the lithium extraction efficiency of the electrochemical salt lake lithium extraction device 10.
Referring to fig. 3 to 5, in one embodiment, the number of the first diversion holes 202 of the mounting frame 222 of each lithium extraction component 220 is not more than 10, and the first diversion holes 202 of the mounting frame 222 of each lithium extraction component 220 are all opened at one side of the corresponding mounting frame 222. Further, the number of the second diversion holes 203 of the mounting frame 222 of each lithium extraction component 220 is not more than 10, and the plurality of the second diversion holes 203 of the mounting frame 222 of each lithium extraction component 220 are all arranged on one side of the corresponding mounting frame 222, so that the lithium extraction efficiency of the device 10 for extracting lithium from salt lakes by electrochemical methods is better ensured under the condition of reducing the cycle energy consumption.
Referring to fig. 3 to 5 together, in one embodiment, the number of the first diversion holes 202 of the mounting frame 222 of each lithium extraction component 220 is 4 to 6, so as to better ensure the lithium extraction efficiency of the device 10 for extracting lithium from the salt lake by the electrochemical method under the condition of reducing the cycle energy consumption.
Referring to fig. 3 to 5 together, in one embodiment, the number of the second diversion holes 203 of the mounting frame 222 of each lithium extraction component 220 is 4 to 6, so as to better ensure the lithium extraction efficiency of the device 10 for extracting lithium from the salt lake by the electrochemical method under the condition of reducing the cycle energy consumption.
In one embodiment, the inner diameter of the first and second guide holes of the mounting frame of each lithium extraction assembly is 0.3cm to 0.5cm.
In one embodiment, the first phosphate layer and the second phosphate layer are each 0.4cm thick.
In one embodiment, the mounting frame is 22cm long by 14cm wide by 2cm thick.
In one embodiment, the thickness of the separator is 0.1cm.
In one embodiment, the positive electrode metal mesh is 20cm long and 12cm wide.
In one embodiment, the anode metal mesh is 20cm long and 12cm wide.
In one embodiment, the sealed reaction chamber width is 0.5cm.
In one embodiment, the seal ring has a thickness of less than 0.1cm.
In one embodiment, the pressure of the movable supporting seat for pressing the membrane stack seat is 4 tons/square meter to 5 tons/square meter, so that the clamping stability of the anion exchange membrane clamped between the electrode plates of the lithium extraction component is well ensured, the sealing effect of the sealing reaction chamber is further well ensured, and the lithium extraction effect of the device for extracting lithium from the salt lake by an electrochemical method is well ensured.
In one embodiment, the negative electrode metal net and the separator are connected to the sealed reaction chambers formed on two opposite sides of the mounting frame for containing the conductive liquid; the positive metal net and the partition plate are connected to the sealed reaction chambers formed on two opposite sides of the mounting frame and used for containing salt lake brine.
In one embodiment, the device for extracting lithium from salt lakes by an electrochemical method further comprises a first circulating pump which is respectively communicated with the first diversion holes on two opposite sides of the mounting frame.
In one embodiment, the device for extracting lithium from the salt lake by the electrochemical method further comprises a second circulating pump which is respectively communicated with the second diversion holes on two opposite sides of the mounting frame.
Compared with the prior art, the utility model has at least the following advantages:
according to the device 10 for extracting lithium from the salt lake by the electrochemical method, the separation plates 221 of the first and second lithium extraction assemblies 220 are connected with the membrane stack support 100, the separation plates 221 of the other two adjacent lithium extraction assemblies 220 are correspondingly arranged, the conductive support pieces 223 embedded on the separation plates 221 of the other two adjacent lithium extraction assemblies 220 are connected, each anion exchange membrane 210 is clamped between the electrode plates 224 of the other two lithium extraction assemblies 220, each anion exchange membrane 210 is respectively connected with the periphery of the electrode plates 224 of the other two lithium extraction assemblies 220, namely, the even and odd lithium extraction assemblies 220 and the anion exchange membranes 210 between the even and odd lithium extraction assemblies form a lithium extraction unit together, the distance between the electrode plates 224 is only the thickness of the anion exchange membrane 210, the lithium ion migration efficiency is higher, the energy consumption for extracting lithium is reduced, in addition, the conductive support pieces 223 embedded on the separation plates 221 of the first and the tail lithium extraction assemblies 220 are respectively used for being electrically connected with a power supply, the conductive support pieces 223 embedded on the separation plates 221 of the other two adjacent lithium extraction assemblies 220 are respectively connected, namely, the lithium extraction units are connected with the lithium extraction unit in series by the simple manner, and the lithium extraction unit has high current extraction efficiency and the safety, and the lithium extraction unit is formed by the method, and the electrochemical method has high current extraction efficiency and the lithium extraction device is realized, and the lithium extraction device is more than a simple and the device.
The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The utility model provides a device of electrochemical method salt lake lithium extraction, includes membrane heap support and draws lithium unit, its characterized in that, draw lithium unit includes:
n anion exchange membranes;
the lithium ion battery pack comprises 2N lithium ion battery packs, each lithium ion battery pack comprises a partition plate, a mounting frame, conductive supporting pieces and electrode plates, wherein the partition plates and the electrode plates are connected to the two opposite sides of the mounting frame at intervals to form a sealed reaction chamber, the conductive supporting pieces are arranged in the sealed reaction chamber and are respectively connected with the partition plates and the electrode plates, the conductive supporting pieces are embedded on the partition plates, 2N lithium ion battery packs are sequentially arranged on a membrane stack support in a stacked mode, the partition plates of the lithium ion battery packs are connected with the membrane stack support in an end-to-end mode, the conductive supporting pieces of the lithium ion battery packs are embedded on the partition plates and are respectively used for being electrically connected with a power supply, each anion exchange membrane is clamped between the electrode plates of the adjacent two lithium ion battery packs, each anion exchange membrane is respectively connected with the periphery of the adjacent two lithium ion battery packs, the rest of the adjacent two lithium ion battery packs are correspondingly arranged on the partition plates of the lithium ion battery packs, and each lithium ion battery pack is embedded on the adjacent lithium ion battery packs, and the rest is connected with the partition plates in a mode that the lithium ion battery pack is more than or equal to 1.
2. The device for extracting lithium from salt lake by electrochemical method according to claim 1, wherein the membrane stack bracket comprises a membrane stack seat and a movable supporting seat, the membrane stack seat is movably connected with the movable supporting seat to form a folding area, the movable supporting seat slides towards a direction close to or far away from the membrane stack seat, 2N lithium extracting components and N anion exchange membranes are stacked and arranged in the folding Zhang Ou, the partition plates of the first lithium extracting component or the last lithium extracting component are connected with the membrane stack bracket, and 2N lithium extracting components and N anion exchange membranes are clamped between the membrane stack seat and the movable supporting seat together; and/or the number of the groups of groups,
and the rest separator plates of every two adjacent lithium extraction assemblies are of an integrated structure.
3. The device for extracting lithium from salt lake by an electrochemical method according to claim 1, wherein at least one cross rod is arranged in the membrane stack bracket, and the cross rod is detachably connected with the membrane stack bracket; at least one hanging piece is arranged on the outer side of the installation frame of each lithium lifting assembly, and the cross rod sequentially penetrates through the hanging pieces of the installation frame of each lithium lifting assembly.
4. The device for extracting lithium from salt lake by an electrochemical method according to claim 1, wherein the mounting frame is an integrally formed corrosion-resistant metal frame; or (b)
The mounting frame comprises an integrated metal frame and a corrosion-resistant metal coating, and the corrosion-resistant metal coating is coated on the integrated metal frame.
5. The device for extracting lithium from salt lake by an electrochemical method according to claim 1, wherein the mounting frame is an integrally formed gold frame; or alternatively, the first and second heat exchangers may be,
the mounting frame is an integrally formed silver frame; or alternatively, the first and second heat exchangers may be,
the mounting frame is an integrally formed nickel frame; or alternatively, the first and second heat exchangers may be,
the mounting frame is an integrally formed titanium frame; or alternatively, the first and second heat exchangers may be,
the mounting frame is a metal frame with the surface plated with gold integrally formed; or alternatively, the first and second heat exchangers may be,
the mounting frame is a metal frame with a silver-plated surface and integrally formed; or alternatively, the first and second heat exchangers may be,
the mounting frame is a metal frame integrally formed by nickel plating on the surface; or alternatively, the first and second heat exchangers may be,
the mounting frame is an integrally formed metal frame with the surface plated with titanium.
6. The device for extracting lithium from salt lake by an electrochemical method according to claim 1, wherein N electrode plates in 2N lithium extracting assemblies comprise positive metal meshes and first phosphate layers, the periphery of the positive metal mesh of each electrode plate is connected with the mounting frame, and the positive metal mesh of each electrode plate penetrates through the corresponding first phosphate layer;
the rest N electrode plates in the 2N lithium extraction components comprise a negative metal net and a second phosphate layer, the periphery of the negative metal net of each electrode plate is connected with the mounting frame, and the negative metal net of each electrode plate penetrates through the corresponding second phosphate layer;
each anion exchange membrane is clamped between the first phosphate layer of the electrode plate of each lithium extraction component and the second phosphate layer of the electrode plate of the adjacent lithium extraction component, and is respectively connected with the periphery of the positive electrode metal net of the electrode plate of each lithium extraction component and the periphery of the negative electrode metal net of the electrode plate of the adjacent lithium extraction component;
wherein the first phosphate layer is a lithium iron phosphate layer, a lithium vanadium phosphate layer, a lithium manganese phosphate layer or a lithium nickel phosphate layer; the second phosphate layer is an iron phosphate ion screen layer, a nickel phosphate ion screen layer, a manganese phosphate ion screen layer or a nickel phosphate ion screen layer.
7. The device for extracting lithium from salt lake by electrochemical method according to claim 1, wherein a sealing ring is arranged on the installation frame of each lithium extracting component, the sealing ring of each lithium extracting component is wound around the periphery of the corresponding electrode plate, and the sealing rings of every two adjacent lithium extracting components are respectively and tightly connected with the corresponding anion exchange membrane.
8. The device for extracting lithium from a salt lake by an electrochemical method according to claim 1, wherein at least one first guide hole and at least one second guide hole are respectively formed on two opposite sides of the installation frame of each lithium extraction assembly, and the first guide hole and the second guide hole are communicated with the sealed reaction chamber.
9. The device for extracting lithium from a salt lake by an electrochemical method according to claim 8, wherein the number of the first diversion holes of the installation frame of each lithium extraction component is not more than 10, and the plurality of the first diversion holes of the installation frame of each lithium extraction component are all arranged on one side of the corresponding installation frame;
the number of the second guide holes of the mounting frame of each lithium extraction component is not more than 10, and the second guide holes of the mounting frame of each lithium extraction component are formed in one side of the corresponding mounting frame.
10. The apparatus for extracting lithium from a salt lake by an electrochemical method according to claim 8, wherein the inner diameter of the first and second guide holes of the mounting frame of each of the lithium extraction modules is 0.3cm to 0.5cm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223154011.4U CN218989354U (en) | 2022-11-25 | 2022-11-25 | Device for extracting lithium from salt lake by electrochemical method |
| CL2023003468U CL2023003468U1 (en) | 2022-11-25 | 2023-11-22 | Apparatus for the extraction of lithium from a saline lake through the electrochemical method |
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|---|---|---|---|
| CN202223154011.4U CN218989354U (en) | 2022-11-25 | 2022-11-25 | Device for extracting lithium from salt lake by electrochemical method |
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| CN218989354U true CN218989354U (en) | 2023-05-09 |
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| CN202223154011.4U Active CN218989354U (en) | 2022-11-25 | 2022-11-25 | Device for extracting lithium from salt lake by electrochemical method |
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| CL (1) | CL2023003468U1 (en) |
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