A device for preparing lithium carbonate in a plateau salt lake and a production device for extracting lithium

Abstract

This utility model relates to an apparatus for preparing lithium carbonate in high-altitude salt lakes and a lithium extraction production device, belonging to the field of lithium extraction technology from salt lakes. It aims to solve at least one of the problems of high cost and long construction period in existing high-altitude salt lake lithium carbonate preparation equipment. The apparatus for preparing lithium carbonate in high-altitude salt lakes includes a third container; the third container houses an extraction lithium extraction system, which is connected to a carbon dioxide back-extraction system, a lithium extraction residue oil removal system, and a lithium extraction back-extraction liquid oil removal system. The lithium extraction back-extraction liquid oil removal system is connected to a pyrolysis system. The third container also houses a third control cabinet. All systems in the lithium carbonate preparation apparatus of this utility model are housed in the third container, resulting in a compact system layout, small footprint, rapid modular factory construction before shipment, convenient transportation, and a mobile production line.

Description

Technical Field

[0001] This utility model relates to the field of lithium extraction technology from salt lakes, and in particular to an apparatus for preparing lithium carbonate in high-altitude salt lakes and a lithium extraction production apparatus. Background Technology

[0002] Salt lakes are rich in resources, and the cost of extracting resources from salt lakes is far lower than that from ore, thus the comprehensive utilization of salt lake resources has a huge market. However, most salt lakes, both domestically and internationally, are located at high altitudes, where environmental conditions are harsh and basic infrastructure is inadequate. Transporting salt lake brine to factories in plains areas would incur substantial transportation costs, further increasing production costs. Therefore, comprehensive utilization production lines for salt lake resources in high-altitude areas are generally built along the lake itself. Existing comprehensive utilization facilities for salt lake resources in high-altitude areas employ construction schemes similar to those in plains areas.

[0003] However, constructing comprehensive salt lake resource utilization production facilities on plateaus faces a series of problems and challenges: ① a lack of supporting public utilities such as freshwater, electricity, and gas; ② low oxygen levels at high altitudes, making them unsuitable for long-term stays by non-plateau residents; ③ the unique geographical location and inconvenient transportation, resulting in extremely high construction and transportation costs and construction difficulties. For these reasons, the construction of comprehensive salt lake resource utilization production facilities in high-altitude areas suffers from high construction costs and long construction periods. Utility Model Content

[0004] Based on the above analysis, this utility model aims to provide an apparatus for preparing lithium carbonate in high-altitude salt lakes and a lithium extraction production apparatus, which is particularly suitable for the comprehensive utilization of salt lake resources in high-altitude areas. It is intended to solve at least one of the problems of high construction cost and long construction period of existing production apparatuses for the comprehensive utilization of salt lake resources in high-altitude areas. It features reasonable space utilization, simple assembly, and the ability to be moved arbitrarily according to production needs.

[0005] In a first aspect, this utility model provides an apparatus for preparing lithium carbonate in a high-altitude salt lake, the apparatus for preparing lithium carbonate including a third container;

[0006] The third container is equipped with an extraction lithium extraction system, a carbon dioxide back-extraction system, a lithium extraction residue oil removal system, a lithium extraction back-extraction liquid oil removal system, a pyrolysis system, a third control cabinet, a lithium extraction extractant transfer tank, a lithium extraction residue storage tank, and a lithium extraction back-extraction agent storage tank.

[0007] The third container is configured in a double-layer structure, with the lithium extraction system, the lithium extraction residual liquid oil removal system, and the lithium extraction back-extraction liquid oil removal system located on the upper layer.

[0008] The lithium extraction system and the lithium extraction back-extraction liquid oil removal system are arranged adjacently above the lithium extraction extractant transfer tank;

[0009] The lithium extraction residue storage tank and the lithium extraction agent transfer tank are located adjacent to each other on the lower floor, and the lithium extraction residue oil removal system is located above the lithium extraction residue storage tank.

[0010] Furthermore, the lithium extraction system is located in the middle of the third container, with a carbon dioxide back-extraction system and a lithium extraction residue oil removal system connected to one side, and a lithium extraction back-extraction liquid oil removal system and a pyrolysis system connected to the other side. The side of the lithium extraction back-extraction liquid oil removal system away from the lithium extraction system is connected to the pyrolysis system.

[0011] Furthermore, the lithium extraction system, the lithium extraction residue oil removal system, and the lithium back-extraction solution oil removal system are all located near the side door of the third container. Furthermore, the carbon dioxide back-extraction system and the third control cabinet are respectively located at opposite ends of the third container, and the lithium extraction residue oil removal system is located between the carbon dioxide back-extraction system and the lithium extraction system.

[0012] Furthermore, the lithium extraction back-extraction liquid oil removal system is located between the lithium extraction system and the third control cabinet, and the pyrolysis system is located between the lithium extraction back-extraction liquid oil removal system and the third control cabinet.

[0013] Furthermore, the lithium extraction system includes two rows of centrifugal extractors, each row consisting of multiple centrifugal extractors connected in series.

[0014] Furthermore, the lithium extraction system also includes a centrifugal extractor with two outlets. One outlet of the centrifugal extractor is connected to the lithium extraction back-extraction liquid degreasing system, and the other outlet is connected to the lithium extraction extractant transfer tank.

[0015] Furthermore, the lithium extraction back-extraction liquid de-oiling system is also connected to a lithium extraction back-extraction agent storage tank and the extraction lithium extraction system, the lithium extraction residual liquid de-oiling system is connected to a lithium extraction residual liquid storage tank, and the extraction lithium extraction system is connected to a lithium extraction extractant transfer tank.

[0016] Furthermore, the carbon dioxide back-extraction system is also connected to a power generation system.

[0017] Secondly, this utility model provides a production device for lithium extraction from high-altitude salt lakes, the production device including the above-mentioned device for preparing lithium carbonate in high-altitude salt lakes.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] (1) In the device for preparing lithium carbonate from high-altitude salt lakes of this utility model, each system is set in the third container. The layout of each system is compact and reasonable, with a small footprint. It can quickly build a modular factory before leaving the factory and quickly complete the installation work during project implementation. It is convenient to transport and can realize the mobility of the production line. The location of the production line can be changed at any time according to the salt lake mining situation.

[0020] (2) This utility model adopts a double-layer setting to fix each system or component, which improves the utilization rate of container space and reduces the total area of ​​equipment installation. For example, the lithium extraction system and the lithium extraction residue oil removal system are respectively set above the lithium extractant transfer tank and the lithium extraction residue storage tank. With this layout, when recovering the liquid, the material can be collected by gravity flow of the liquid, without the need to set up other power equipment. This not only reduces the number of pumps and components, saving container space, but also reduces costs.

[0021] (3) The lithium extraction residue oil removal system in this utility model is located in the middle of the third container and near one of the side doors of the third container. This makes it convenient for staff to open the door of the third container to perform regular maintenance, inspection and repair of each system or component. It also reduces the length of the connecting pipes. The above-mentioned arrangement of each system or component in the third container can avoid excessive weight at one end of the third container and ensure stable operation during the hoisting process.

[0022] (4) In this utility model, the extraction lithium extraction system is set in the middle of the third container. One end of the extraction lithium extraction system is equipped with a carbon dioxide back-extraction system and the other end is equipped with a lithium extraction back-extraction liquid de-oiling system and a pyrolysis system. This allows the connection between the carbon dioxide back-extraction system and the extraction lithium extraction system, the lithium extraction back-extraction liquid de-oiling system and the pyrolysis system to avoid the pipes between the components from turning back again. Compared with the conventional extraction lithium extraction system and the carbon dioxide back-extraction system, the lithium extraction back-extraction liquid de-oiling system and the pyrolysis system are connected one by one, the pipe length is shorter.

[0023] (5) In the device for preparing lithium carbonate from high-altitude salt lakes of this utility model, each system is modular, which is convenient to transport and enables the production line to be mobile. The location of the production line can be changed at any time according to the salt lake mining situation. The assembly and disassembly are simple and can quickly realize the assembly and disassembly of each skid, with a very short construction period.

[0024] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0025] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0026] Figure 1 This is a schematic diagram of the structure of a first container in this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of a second container in this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of a third container in this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of a fourth container in this utility model;

[0030] Figure 5 This invention relates to a lithium extraction production device from a high-altitude salt lake.

[0031] Figure label:

[0032] 1-First Container, 101-Brine Tank, 102-Filtration System, 103-Extraction and Impurity Removal System, 104-Impurity Residue and Oil Removal System, 105-Impurity Removal and Back-extraction Liquid and Oil Removal System, 106-First Control Cabinet, 107-Filtrate Tank, 108-Precision Filter, 109-Brine Transfer Tank, 2-Second Container, 201-Pretreatment System, 202-Control System, 3-Third Container, 301-Lithium Extraction System, 302-Carbon Dioxide Back-Extraction System, 303-Lithium Extraction Residue and Oil Removal System, 304-Lithium Extraction Back-extraction Liquid and Oil Removal System, 305-Pyrolysis System, 306-Third Control Cabinet, 307-Lithium Extraction Agent Transfer Tank, 308-Lithium Extraction Residue Storage Tank, 309-Lithium Extraction Back-extraction Agent Storage Tank, 4-Fourth Container, 401-Automatic Packaging System, 402-Washing, Filtration and Drying System, 403-Ultra-fine Grinding System, 5-Fifth Container. Detailed Implementation

[0033] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0034] A specific embodiment of this utility model is as follows: Figure 3As shown, an apparatus for preparing lithium carbonate in a high-altitude salt lake is disclosed. The apparatus includes a third container 3, which is equipped with an extraction lithium extraction system 301, a carbon dioxide back-extraction system 302, a lithium extraction residue oil removal system 303, a lithium back-extraction liquid oil removal system 304, a pyrolysis system 305, a third control cabinet 306, a lithium extraction extractant transfer tank 307, a lithium extraction residue storage tank 308, and a lithium extraction back-extraction agent storage tank 309.

[0035] The third container 3 is configured in a double-layer structure, with the lithium extraction system 301, the lithium extraction residual liquid oil removal system 303, and the lithium extraction back-extraction liquid oil removal system 304 located on the upper layer.

[0036] The lithium extraction system 301 and the lithium extraction back-extraction liquid oil removal system 304 are arranged adjacently above the lithium extraction extractant transfer tank 307.

[0037] The lithium extraction residue storage tank 308 and the lithium extraction agent transfer tank 307 are located adjacent to each other on the lower layer, and the lithium extraction residue oil removal system 303 is located above the lithium extraction residue storage tank 308.

[0038] Compared with the prior art, each system in the device of this utility model is set in the third container 3. The layout of each system is compact and reasonable, with a small footprint. It can quickly build a modular factory before leaving the factory, and quickly complete the installation work during project implementation. It is convenient to transport and can realize the mobility of the production line, and the position of the production line can be changed at any time according to the salt lake mining situation.

[0039] Specifically, the carbon dioxide back-extraction system 302 and the third control cabinet 306 are respectively located at both ends of the third container 3, the lithium extraction residue oil removal system 303 is located between the carbon dioxide back-extraction system 302 and the extraction lithium extraction system 301, and the extraction lithium extraction system 301, the lithium extraction residue oil removal system 303 and the lithium extraction back-extraction liquid oil removal system 304 are all located near the side door of the third container 3.

[0040] Specifically, the lithium extraction back-extraction liquid oil removal system 304 is located between the lithium extraction system 301 and the third control cabinet 306, and the pyrolysis system 305 is located between the lithium extraction back-extraction liquid oil removal system 304 and the third control cabinet 306.

[0041] It should be noted that the lithium extraction system 301, the lithium extraction residue oil removal system 303, and the lithium extraction back-extraction solution oil removal system 304 are located in the middle of the third container 3, and close to the side door (or, for example, the same side door) of the third container 3. This facilitates the opening of the door of the third container 3 by personnel to perform regular maintenance, inspection, and repair of each system or component. The above-mentioned arrangement of the systems or components in the third container 3 avoids excessive weight at one end of the third container 3, ensuring stable operation during hoisting.

[0042] In addition, the lithium extraction system 301 is located in the middle of the third container 3. One end of the lithium extraction system 301 is equipped with a carbon dioxide back-extraction system 302, and the other end is equipped with a lithium extraction back-extraction liquid de-oiling system 304 and a pyrolysis system 305. Since the carbon dioxide back-extraction system 302 is connected to the lithium extraction system 301, the lithium extraction back-extraction liquid de-oiling system 304 and the pyrolysis system 305 in sequence, this arrangement can avoid the pipes between the components from turning back again. Compared with the conventional method where the lithium extraction system 301 is connected to the carbon dioxide back-extraction system 302, the lithium extraction back-extraction liquid de-oiling system 304 and the pyrolysis system 305 one by one, the pipe length is shorter.

[0043] The carbon dioxide back-extraction system 302 in this invention is used to extract lithium. It extracts lithium from the loaded organic phase using carbon dioxide to form an oil-water mixture.

[0044] Specifically, a lithium extraction agent transfer tank 307 is connected below the lithium extraction system 301.

[0045] Specifically, the lithium extraction residual liquid oil removal system 303 is connected to a lithium extraction residual liquid storage tank 308 for storing lithium extraction residual liquid.

[0046] It should be noted that the lithium extraction system 301 and the lithium extraction residue oil removal system 303 are respectively located above the lithium extractant transfer tank 307 and the lithium extraction residue storage tank 308. This double-layer arrangement secures each system or component, improving container space utilization and reducing the total area of ​​installed equipment. Furthermore, during liquid recovery, gravity flow is sufficient for material collection, eliminating the need for additional power equipment. This not only reduces the number of pumps and components, saving container space, but also lowers costs.

[0047] In a further embodiment, the lithium extraction system 301 includes two rows of centrifugal extractors, each row consisting of multiple centrifugal extractors connected in series.

[0048] In a further embodiment, the lithium extraction system 301 also includes a centrifugal extractor with two outlets. One outlet of the centrifugal extractor is connected to the lithium extraction back-extraction liquid degreasing system 304, and the other outlet is connected to the lithium extraction extractant transfer tank 307.

[0049] The centrifugal extractor is used to separate the oil-water mixture inside the carbon dioxide back-extraction system 302. After oil-water separation, the oil phase is the lithium extraction extractant, which is returned to the lithium extraction extractant transfer tank 307 for recycling. The aqueous phase is the pyrolysis product (lithium carbonate), which enters the lithium extraction back-extraction agent storage tank 309.

[0050] It should be noted that the lithium extraction system 301 includes two sections: extraction and washing. Extraction and washing are performed by two rows of centrifugal extractors, respectively. The lithium-rich solution (aqueous phase) and lithium extraction extractant (oil phase) after being treated by the impurity removal device enter from both ends of the first row of centrifugal extractors, i.e., the inlet of the centrifugal extractor, and are subjected to countercurrent extraction. The two ends of the first row of centrifugal extractors, i.e., the outlet of the centrifugal extractor, respectively obtain the lithium extraction raffinate (i.e., lithium extraction raffinate) and the lithium-rich extract. The lithium extraction raffinate enters the lithium extraction raffinate oil removal system 303 for oil removal treatment (recovering the lithium extraction extractant).

[0051] The lithium-rich extract and washing water enter from the inlets of the first and last centrifugal extractors in the second row for washing. The outlets of the first and last centrifugal extractors at both ends of the second row yield washing water and a loaded organic phase (lithium-rich), respectively. The loaded organic phase enters the carbon dioxide back-extraction system 302, and the washing water is returned to the second row of centrifugal extractors. The washing water can be recycled repeatedly.

[0052] The washing water washes out impurities from the lithium-rich extract, and may also wash out some lithium. Since the washing water also contains lithium, it is recycled, which causes some of the lithium in the washing water to dissolve into the lithium-rich extract.

[0053] It should be noted that this solution does not limit the specific arrangement of the centrifugal extractors; it can also be three or four rows. Alternatively, the centrifugal extractors can be placed near the lithium extraction residue oil removal system 303 for extraction, and near the lithium extraction back-extraction liquid oil removal system 304 for washing. The specific solution can be set according to actual needs and is not limited here.

[0054] Specifically, the lithium extraction back-extraction liquid de-oiling system 304 is also connected to a lithium extraction back-extraction agent storage tank 309.

[0055] Specifically, the carbon dioxide back-extraction system 302 is also connected to the power generation system.

[0056] The carbon dioxide in the carbon dioxide back-extraction system 302 of this invention is provided by the power generation system and is carbon dioxide after the exhaust gas generated by the power generation system is treated.

[0057] In this invention, lithium is converted into solid or solid-liquid mixture lithium carbonate within the pyrolysis system 305. The lithium in the pyrolysis system 305 is also connected to the lithium extraction agent storage tank 309. The third control cabinet 306 controls the operation of each system in the third container 3.

[0058] A specific embodiment of this utility model is as follows: Figure 1 and 2 As shown, a device for removing impurities from brine in high-altitude salt lakes is disclosed, comprising a first container 1 and a second container 2 connected to each other;

[0059] The first container 1 is equipped with a brine tank 101 and a first control cabinet 106. The brine tank 101 is connected to a filtration system 102 and an extraction and impurity removal system 103. The extraction and impurity removal system 103 is connected to an impurity removal residual liquid oil removal system 104 and an impurity removal back-extraction liquid oil removal system 105.

[0060] The second container 2 is equipped with a pretreatment system 201 and a control system 202.

[0061] Compared with the prior art, the impurity removal device of this utility model is set in two containers, which can quickly realize the construction of a modular factory before leaving the factory and quickly complete the installation work during project implementation. The impurity removal device of this utility model has high space utilization, small footprint, cost savings, and can operate continuously.

[0062] Specifically, the filtration system 102 is a plate and frame filter press.

[0063] Specifically, a filtrate tank 107 is connected below the filtration system 102, and the filtrate tank 107 is connected to the pretreatment system 201. A precision filter 108 is installed below the brine tank 101.

[0064] Specifically, a heat exchanger is also provided below the brine tank 101, and the two ends of the heat exchanger are respectively connected to the precision filter 108 and the extraction and impurity removal system 103.

[0065] An alternative solution is to also install a heat exchanger in the second container 2, with both ends of the heat exchanger connected to the pretreatment system 201 and the precision filter 108, respectively.

[0066] It should be noted that multiple brine tanks 101 can be provided in this utility model. This utility model uses two brine tanks 101 as an example for explanation. The brine tanks 101 are connected to the plate and frame filter press through pipes. The filtrate after being processed by the plate and frame filter press enters the filtrate tank 107. The filtrate enters the pretreatment system 201 for pretreatment. After sedimentation to remove impurities, it enters the precision filter 108 for further filtration. After the brine is purified to meet the requirements, it enters the extraction and impurity removal system 103. In a further embodiment, the filtrate after being filtered by the precision filter 108 is heat-exchanged through a heat exchanger before entering the extraction and impurity removal system 103. The heat medium of the heat exchanger comes from the generator.

[0067] Specifically, the extraction and impurity removal system 103 is provided with a brine transfer tank 109, an impurity removal extractant tank, and a back-extraction agent transfer tank below it. The brine transfer tank 109, the impurity removal extractant tank, and the back-extraction agent transfer tank are all connected to the extraction and impurity removal system 103.

[0068] It should be noted that the positions of the brine transfer tank 109, the impurity removal extractant tank, and the back-extraction agent transfer tank below the extraction and impurity removal system 103 can be adjusted according to the actual layout. However, they are located below the extraction and impurity removal system 103. This saves space within the first container 1, improves the space utilization of the first container 1, reduces the distance between the brine transfer tank 109, the impurity removal extractant tank, and the back-extraction agent transfer tank and the extraction and impurity removal system 103, reduces the length of pipelines between the components, saves costs, and reduces the failure rate. In addition, the extraction and impurity removal system 103 is positioned above because the liquid from the centrifugal extractor, due to gravity, can directly enter the brine transfer tank 109, the impurity removal extractant tank, or the back-extraction agent transfer tank without the need for a pump.

[0069] In addition, the brine transfer tank 109 is set up to ensure the continuous operation of the extraction and impurity removal system 103. The brine after being processed by the heat exchanger enters the brine transfer tank 109 for storage, and then enters the extraction and impurity removal system 103, thereby achieving continuous operation.

[0070] Specifically, the impurity removal residual liquid oil removal system 104 and the impurity removal back-extraction liquid oil removal system 105 are respectively arranged on both sides of the extraction impurity removal system 103.

[0071] Specifically, the extraction residue and oil removal system 104 is connected to a storage tank for the extraction residue below, and the extraction residue and oil removal system 105 is connected to a transfer tank for the extraction residue below.

[0072] It should be noted that the positions of the impurity removal residual liquid oil removal system 104 and the impurity removal back-extraction liquid oil removal system 105 can be interchanged. In this utility model, the impurity removal residual liquid oil removal system 104 is set between the brine tank 101 and the extraction impurity removal system 103, and the impurity removal back-extraction liquid oil removal system 105 is set between the extraction impurity removal system 103 and the first control cabinet 106 as an example for explanation.

[0073] Specifically, the extraction and impurity removal system 103 includes two rows of centrifugal extractors, each row of which consists of multiple centrifugal extractors connected in series.

[0074] It should be noted that the arrangement of two rows of centrifugal extractors in this utility model can improve space utilization, facilitate maintenance and repair, and facilitate the pipeline arrangement between centrifugal extractors. Multiple rows can also be arranged, as long as they can achieve the purpose of the two stages of impurity removal extraction and impurity removal extractant recovery in this utility model.

[0075] The extraction and impurity removal system 103 of this invention includes two sections: impurity removal extraction and impurity removal extractant recovery. These two functions are achieved by two rows of centrifugal extractors. First, the brine after heat exchange and the impurity removal extractant (stored in the impurity removal extractant tank) are respectively introduced into the first centrifugal extractor and the last centrifugal extractor of the first row of centrifugal extractors through their respective inlets. The extraction is carried out in a countercurrent manner. The outlet of the first centrifugal extractor is the impurity removal extractant containing impurities, and the outlet of the last centrifugal extractor is the raffinate (i.e., lithium-rich solution).

[0076] It should be noted that, in this invention, the impurity removal extraction refers to extracting impurities in the brine into the impurity removal extractant.

[0077] The raffinate first enters the impurity removal and oil removal system 104 for oil removal treatment (the oil phase is the impurity removal extractant, which can be recycled and reused) before entering the next process, namely the lithium extraction system 301. In a further embodiment, the raffinate after oil removal treatment enters the third container 3, which can realize continuous production of the entire process.

[0078] The impurity-removing extractant and back-extraction agent (stored in a back-extraction agent transfer tank) containing impurities are processed in a second-row centrifugal extractor to obtain a purified extractant (free of impurities) and a back-extraction liquid (containing impurities, such as salt from the salt lake). The purified extractant enters a purified extractant tank, which is connected to the first-row centrifugal extractor for recycling. The back-extraction liquid enters a purified back-extraction liquid oil removal system 105 for oil removal treatment to obtain an oil-removed back-extraction liquid and a purified back-extraction agent. Since the oil-removed back-extraction liquid meets discharge standards, it can be directly returned to the salt lake or salt flat. The purified extractant enters the purified extractant tank for recycling.

[0079] It should be noted that this scheme does not limit the specific arrangement of centrifuges; it can also be three or four rows. Alternatively, centrifugal extractors can be placed near the impurity removal and oil removal system 104 for impurity removal and extraction, while centrifuges near the impurity removal and oil removal system 105 can be placed near the impurity removal and back-extraction system 105 for impurity removal and extraction agent recovery. The specific scheme can be set according to actual needs and is not limited here.

[0080] In a further embodiment, before the raffinate enters the extraction and lithium extraction system 301, it first enters the raffinate storage tank to store the raffinate, and then the raffinate enters the extraction and lithium extraction system 301 through a pump.

[0081] It should be noted that the raffinate storage tank is set up to ensure the continuous operation of the lithium extraction system 301. The raffinate after oil removal is stored in the raffinate storage tank and then enters the lithium extraction system 301, thereby achieving continuous and stable operation.

[0082] Specifically, the filtration system 102 and the first control cabinet 106 are respectively located at both ends of the first container 1, the extraction and impurity removal system 103 is located in the middle of the first container 1, and the brine tank 101 is located between the filtration system 102 and the extraction and impurity removal system 103.

[0083] Specifically, the impurity removal device for high-altitude salt lake brine is also connected to the power generation system.

[0084] It should be noted that the first control cabinet 106 is located away from the chemical raw materials and is independent of the equipment installation space. It is separated by a partition and located near one end of the first container 1, which facilitates the operation and control of the various systems in the first container. The control system 202 controls the operation of the various systems in each container.

[0085] Another specific embodiment of this utility model is as follows: Figure 5 As shown, a lithium extraction production device from a high-altitude salt lake is disclosed, which, according to the production process flow, includes the above-mentioned impurity removal device for high-altitude salt lake brine, the device for preparing lithium carbonate, the fourth container 4, and the fifth container 5.

[0086] Among them, such as Figure 4 As shown, the fourth container is equipped with an automatic packaging system 401, a washing, filtering and drying system 402 and an ultra-fine pulverizing system 403 in sequence according to the production process.

[0087] Specifically, the lithium extraction production unit from the high-altitude salt lake also includes a fifth container 5, which is equipped with a power generation system. The power generation system is connected to the impurity removal device for the high-altitude salt lake brine, the lithium carbonate preparation device, and the fourth container.

[0088] It should be noted that in this utility model, the hot water generated by the power generation system is used as a heat medium to heat the various systems that need to be heated, and the generated carbon dioxide is used in the carbon dioxide back-extraction system 302.

[0089] Specifically, each of the first container 1, second container 2, third container 3, fourth container 4, and fifth container 5 has openings on two opposite sides to facilitate maintenance of the systems inside the containers and to connect pipes for convenient transport of liquid materials. The remaining two sides of each of the five containers are equipped with detachable side doors, and the top is equipped with a detachable roof for easy equipment maintenance and repair. The first control cabinet 106, the control system 202, and the third control cabinet 306 are located at one end of their respective containers for easy operation by staff.

[0090] Specifically, the control system 202 is electrically connected to the first container 1, the second container 2, the third container 3, the fourth container 4, and the fifth container 5, and controls the operation of each system in each container.

[0091] It should be noted that the various devices in this utility model are connected by pipes. The reasonable spatial layout of each system or component in each container can also avoid excessive weight at one end of each container, ensuring stable operation during hoisting.

[0092] The unique energy comprehensive utilization technology of the lithium extraction production device in the high-altitude salt lake of this utility model can convert the exhaust gas of the power generation system into process gas, and at the same time, it can make full use of the heat energy generated by the power generation system to realize the heat exchange process. This not only reduces the adverse impact of the exhaust gas of the power generation system on the high-altitude environment, but also significantly saves the consumption of public works, making it green and energy-saving.

[0093] This invention relates to a lithium extraction production device for high-altitude salt lakes. Different systems are housed within different containers, maximizing space utilization and facilitating maintenance. While fully utilizing the limited space of the containers, it also adheres to chemical engineering design standards and ergonomic principles. This high-altitude salt lake lithium extraction production device integrates a complete lithium extraction production line into a skid-mounted structure, completed within five containers. Each container requires only simple pipe connections to form a stable and fully operational production line. This allows for rapid modular factory construction before shipment and quick installation during project implementation. This invention uses the gas source (carbon dioxide) generated by the power generation system as the gas source in the carbon dioxide back-extraction system 302.

[0094] The lithium extraction production unit of this invention, located in a high-altitude salt lake, has a compact layout and occupies a small area. For example, a conventional plant with an annual production capacity of 2500 tons of lithium carbonate, using the same technology and equipment, occupies approximately 1200 square meters. 2The skid-mounted factory of this utility model has a building area of ​​250m². 2 When arranged in layers, the minimum floor area is only 150m². 2 about.

[0095] In addition, the device of this utility model is easy to transport, enabling the production line to be mobile and its location to be changed at any time according to the salt lake mining situation; it is simple to assemble and disassemble, and can quickly assemble and disassemble the various skids, with a very short construction period.

[0096] The technical solution of this utility model will be further explained below with reference to specific embodiments.

[0097] Example 1

[0098] like Figure 1 and Figure 2 As shown in the figure, this embodiment of a device for removing impurities from brine in a high-altitude salt lake includes a first container 1 and a second container 2 connected to each other.

[0099] The first container 1 is equipped with a brine tank 101 and a first control cabinet 106. The brine tank 101 is connected to a filtration system 102 and an extraction and impurity removal system 103. The extraction and impurity removal system 103 is connected to an impurity removal residual liquid oil removal system 104 and an impurity removal back-extraction liquid oil removal system 105.

[0100] The second container 2 is equipped with a pretreatment system 201 and a control system 202.

[0101] The filtration system 102 and the first control cabinet 106 are respectively located at both ends of the first container 1, the extraction and impurity removal system 103 is located in the middle of the first container 1, the brine tank 101 is located between the filtration system 102 and the extraction and impurity removal system 103, and both are close to one side door of the first container, the impurity removal residual liquid oil removal system 104 is located between the brine tank 101 and the extraction and impurity removal system 103, and the impurity removal back-extraction liquid oil removal system 105 is located between the extraction and impurity removal system 103 and the first control cabinet 106.

[0102] In this embodiment, the filtration system 102 is a plate and frame filter press. A filtrate tank 107 is connected below the plate and frame filter press, and the filtrate tank 107 is connected to the pretreatment system 201. A precision filter 108 and a heat exchanger are installed below the brine tank 101. The precision filter 108 is connected to the pretreatment system 201, and both ends of the heat exchanger are connected to the precision filter 108 and the extraction and impurity removal system 103, respectively.

[0103] In a further embodiment, the extraction and impurity removal system 103 is provided with a brine transfer tank 109, an impurity removal extractant tank, and a back-extraction agent transfer tank below it.

[0104] The heat exchanger is connected in sequence to the brine transfer tank 109 and the extraction and impurity removal system 103. Both the impurity removal extractant tank and the back-extraction agent transfer tank are connected to the extraction and impurity removal system 103.

[0105] In a further embodiment, the extraction and impurity removal system 103 includes two rows of centrifugal extractors, each row of which consists of multiple centrifugal extractors connected in series.

[0106] Specifically, the first control cabinet 106 is located away from the chemical raw materials and is independent of the equipment installation space, separated by a partition, and is located near one end of the first container 1.

[0107] Example 1-1

[0108] The impurity removal device for high-altitude salt lake brine in this embodiment is the same as that in Embodiment 1, except that the heat exchanger is installed in the second container 2, and the two ends of the heat exchanger are respectively connected to the pretreatment system 201 and the precision filter 108.

[0109] Example 2

[0110] like Figure 3 As shown, an apparatus for preparing lithium carbonate in a high-altitude salt lake includes a third container 3, which houses an extraction lithium extraction system 301. The extraction lithium extraction system 301 is connected to a carbon dioxide back-extraction system 302, a lithium extraction residue oil removal system 303, and a lithium extraction back-extraction liquid oil removal system 304. The lithium extraction back-extraction liquid oil removal system 304 is connected to a pyrolysis system 305. The third container 3 also houses a third control cabinet 306. The carbon dioxide back-extraction system 302 is also connected to a power generation system.

[0111] The carbon dioxide back-extraction system 302 and the third control cabinet 306 are respectively located at both ends of the third container 3. The lithium extraction residue oil removal system 303 is located between the carbon dioxide back-extraction system 302 and the extraction lithium extraction system 301. The extraction lithium extraction system 301, the lithium extraction residue oil removal system 303, and the lithium extraction back-extraction liquid oil removal system 304 are all located near the side door of the third container 3. The lithium extraction back-extraction liquid oil removal system 304 is located between the extraction lithium extraction system 301 and the third control cabinet 306. The pyrolysis system 305 is located between the lithium extraction back-extraction liquid oil removal system 304 and the third control cabinet 306.

[0112] In a further embodiment, the brine treated in Example 1 is fed into the lithium extraction system 301 for further processing. A lithium extraction agent transfer tank 307 is located below the lithium extraction system 301, and a lithium extraction residue storage tank 308 is connected below the lithium extraction residue degreasing system 303. The lithium extraction system 301 includes two rows of centrifugal extractors, each row consisting of multiple centrifugal extractors connected in series. The lithium extraction back-extraction liquid degreasing system 304 is also connected to a lithium extraction back-extraction agent storage tank 309.

[0113] Example 2-1

[0114] The apparatus for preparing lithium carbonate in a high-altitude salt lake in this embodiment is the same as that in Embodiment 2, except that the lithium extraction system 301 further includes a centrifugal extractor with two outlets. One outlet of the centrifugal extractor is connected to the carbon dioxide back-extraction system 302, and the other outlet is connected to the lithium extraction agent transfer tank 307.

[0115] Example 3

[0116] A lithium extraction production device from a high-altitude salt lake, such as Figure 1-5 As shown, the production process includes, in sequence, the impurity removal device for high-altitude salt lake brine of Example 1, the lithium carbonate preparation device of Example 2, and the fourth container 4.

[0117] The fourth container is equipped with an automatic packaging system 401, a washing, filtering and drying system 402 and an ultra-fine pulverizing system 403 in sequence according to the production process.

[0118] In a further embodiment, the lithium extraction production unit from the high-altitude salt lake also includes a fifth container 5, which is equipped with a power generation system. The power generation system is electrically connected to the impurity removal device for the high-altitude salt lake brine, the lithium carbonate preparation device, and the fourth container.

[0119] The first container 1, the second container 2, the third container 3, the fourth container 4, and the fifth container 5 are provided with openings on two opposite sides, and the remaining two sides of the five containers are provided with detachable side doors, and the tops are provided with detachable roofs, which facilitates equipment maintenance and repair.

[0120] Those skilled in the art will understand that the programs / software involved in the first control cabinet 106, the third control cabinet 306, and the control system 202 in the above embodiments are common methods in the prior art, and this utility model does not involve any software improvements. This utility model only requires connecting the various devices with corresponding functions through the connection relationships given in the embodiments of this utility model, which does not involve any program or software improvements. As for the connection methods between the various hardware devices with corresponding functions, they can all be implemented by those skilled in the art using existing technology, and will not be described in detail here.

[0121] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for producing lithium carbonate from a high-altitude salt lake, characterized in that, The apparatus for preparing lithium carbonate includes a third container (3); the third container (3) is equipped with an extraction lithium extraction system (301), a carbon dioxide back-extraction system (302), a lithium extraction residue oil removal system (303), a lithium extraction back-extraction liquid oil removal system (304), a pyrolysis system (305), a third control cabinet (306), a lithium extraction extractant transfer tank (307), a lithium extraction residue storage tank (308), and a lithium extraction back-extraction agent storage tank (309); The third container (3) is configured in a double-layer structure, wherein the lithium extraction system (301), the lithium extraction residue oil removal system (303), and the lithium extraction back-extraction liquid oil removal system (304) are located in the upper layer; The lithium extraction system (301) and the lithium extraction back-extraction liquid oil removal system (304) are arranged adjacently above the lithium extraction extractant transfer tank (307); The lithium extraction residue storage tank (308) and the lithium extraction extractant transfer tank (307) are located adjacent to each other on the lower layer, and the lithium extraction residue oil removal system (303) is located above the lithium extraction residue storage tank (308).

2. The device for preparing lithium carbonate from plateau salt lake according to claim 1, characterized in that, The lithium extraction system (301) is located in the middle of the third container. On one side, a carbon dioxide back-extraction system (302) and a lithium extraction residue oil removal system (303) are connected respectively. On the other side, a lithium extraction back-extraction liquid oil removal system (304) and a pyrolysis system (305) are connected. The side of the lithium extraction back-extraction liquid oil removal system (304) away from the lithium extraction system (301) is connected to the pyrolysis system (305).

3. The device for preparing lithium carbonate from highland salt lake according to claim 1, characterized in that, The lithium extraction system (301), the lithium extraction residue oil removal system (303), and the lithium extraction back-extraction liquid oil removal system (304) are all located near the side door of the third container (3).

4. The device for preparing lithium carbonate from highland salt lake according to claim 1, characterized in that, The carbon dioxide back-extraction system (302) and the third control cabinet (306) are respectively located at both ends of the third container (3), and the lithium extraction residue oil removal system (303) is located between the carbon dioxide back-extraction system (302) and the lithium extraction system (301).

5. The device for preparing lithium carbonate from highland salt lake according to claim 1, characterized in that, The lithium extraction back-extraction liquid oil removal system (304) is located between the lithium extraction system (301) and the third control cabinet (306), and the pyrolysis system (305) is located between the lithium extraction back-extraction liquid oil removal system (304) and the third control cabinet (306).

6. The device for preparing lithium carbonate from plateau salt lake according to any one of claims 1-5, characterized in that, The lithium extraction system (301) includes two rows of centrifugal extractors, each row consisting of multiple centrifugal extractors connected in series.

7. The device for preparing lithium carbonate from high-salinity salt lakes according to claim 6, characterized in that, The lithium extraction system (301) further includes a centrifugal extractor with two outlets, one outlet of which is connected to the lithium extraction back-extraction liquid de-oiling system (304), and the other outlet is connected to the lithium extraction extractant transfer tank (307).

8. The device for preparing lithium carbonate from high-salinity salt lakes according to any one of claims 1-5, characterized in that, The lithium extraction back-extraction liquid de-oiling system (304) is also connected to the lithium extraction back-extraction agent storage tank (309) and the lithium extraction extraction system (301). The lithium extraction residual liquid de-oiling system (303) is connected to the lithium extraction residual liquid storage tank (308). The lithium extraction extraction system (301) is connected to the lithium extraction extractant transfer tank (307).

9. The device for preparing lithium carbonate from high-salinity salt lakes according to any one of claims 1-5, characterized in that, The carbon dioxide back extraction system (302) is also connected to a power generation system.

10. A production device for extracting lithium from plateau salt lake, characterized in that, The production device comprises the device for preparing lithium carbonate from plateau salt lake in any one of claims 1-9.

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