Lithium hydroxide spraying carbonization device

Abstract

The utility model discloses a lithium hydroxide jet carbonization device, including raw material mechanism, conversion mechanism, reaction mechanism and control mechanism, the conversion mechanism is vertically installed in the raw material mechanism and is used for converting the raw material in the raw material mechanism, the reaction mechanism is vertically installed in the conversion mechanism and is used for converting the raw material in the raw material mechanism, and the control mechanism is used for controlling the reaction mechanism. The reaction mechanism is used for reacting raw materials converted by the conversion mechanism, the control mechanism is vertically mounted on the reaction mechanism and is used for controlling the interior of the reaction mechanism, the raw material mechanism comprises a lithium hydroxide solution storage tank and a carbon dioxide storage tank, the lithium hydroxide solution storage tank is mounted at one end of the conversion mechanism, and the carbon dioxide storage tank is mounted at the other end of the conversion mechanism. The lithium hydroxide solution storage tank is connected with the conversion mechanism, the carbon dioxide storage tank is mounted at one end of the reaction mechanism, the carbon dioxide storage tank is connected with the reaction mechanism, and the device realizes efficient mixing of a lithium hydroxide solution and carbon dioxide gas-liquid by introducing a rotary jet carbonizer.

Description

Technical Field

[0001] The utility model relates to the field of the development of spraying technology, in particular to a lithium hydroxide spraying carbonization device. Background Art

[0002] With the booming development of the new energy industry, especially the rapid growth of the lithium-ion battery market, the demand for high-quality battery-grade lithium carbonate is increasing day by day. As one of the key raw materials for lithium-ion batteries, the purity and quality of lithium carbonate directly affect the performance, safety and service life of the batteries. Therefore, how to efficiently and stably produce high-purity battery-grade lithium carbonate has become the focus of attention in the industry;

[0003] At present, the methods for purifying and preparing battery-grade lithium carbonate from crude lithium carbonate include: lithium carbonate recrystallization method, causticization method, electrolysis method, carbonization precipitation method, carbonization decomposition method, etc. The recrystallization method has low production cost but long production cycle; the causticization method is simple in operation and widely used in industry but cannot accurately control the reaction end point; the electrolysis method can prepare high-purity lithium carbonate but chlorine gas will be released during the production process, deteriorating the environment, and has high requirements for ion exchange membranes, making it difficult to industrialize; the carbonization precipitation method has strong operability but high cost due to the use of a large amount of lithium hydroxide, and the filtrate cannot be recycled; the carbonization decomposition method is simple in operation, has simple equipment and easily available raw materials, but has a slow carbonization reaction rate, low CO2 utilization rate, and unsatisfactory removal effect on impurities calcium and magnesium. Therefore, it is urgently needed to be improved;

[0004] The reaction of lithium hydroxide with carbon dioxide mainly involves dissolving lithium hydroxide and simultaneously using food-grade carbon dioxide for carbonization reaction. During this process, relevant parameters such as the carbonization duration, pressure and temperature must be well controlled. After separation by a centrifuge, a raw material slurry is obtained, and the highest purity is achieved after drying. The product purity is greatly affected by the purity of LiOH. This method is prone to wall sticking problems during preparation, and the reaction time and end point are not easy to control. The carbonization reaction rate is relatively slow and the CO2 absorption rate is relatively low, resulting in waste of carbon dioxide. To solve this problem, the inventor of the present application has proposed a lithium hydroxide spraying carbonization device. Summary of the Invention

[0005] In view of the deficiencies in the above technologies, the utility model provides a lithium hydroxide spraying carbonization device.

[0006] To achieve the above object, the present utility model adopts the following technical solution: A lithium hydroxide jet carbonization device, comprising a raw material mechanism, a conversion mechanism, a reaction mechanism, and a control mechanism. The conversion mechanism is vertically installed on the raw material mechanism for converting the raw materials inside the raw material mechanism. The reaction mechanism is vertically installed on the conversion mechanism for reacting to the raw materials converted by the conversion mechanism. The control mechanism is vertically installed on the reaction mechanism for controlling the inside of the reaction mechanism. The raw material mechanism includes a lithium hydroxide solution storage tank and a carbon dioxide storage tank. The lithium hydroxide solution storage tank is installed at one end of the conversion mechanism and is connected to the conversion mechanism. The carbon dioxide storage tank is installed at one end of the reaction mechanism and is connected to the reaction mechanism.

[0007] As a further elaboration, a circulation pump extends outward from the lithium hydroxide solution storage tank. The circulation pump is installed at one end of the lithium hydroxide solution storage tank and is connected to the lithium hydroxide solution storage tank. A heat exchanger extends outward from the circulation pump. The heat exchanger is installed at one end of the circulation pump and is connected to the circulation pump for cooling the lithium hydroxide solution by heat exchange. The lithium hydroxide solution storage tank is located at one end of the circulation pump.

[0008] As a further elaboration, the reaction mechanism includes a housing and a first rotary jet carbonizer. The first rotary jet carbonizer is vertically installed on the housing for shearing the lithium hydroxide solution and carbon dioxide gas-liquid to form a pseudo-homogeneous gas-liquid foam flow. The carbon dioxide storage tank is located at one end of the housing.

[0009] As a further elaboration, a first nozzle extends outward from the first rotary jet carbonizer. The first nozzle is vertically installed on the first rotary jet carbonizer. A first mixing chamber extends outward from the first nozzle. The first mixing chamber is vertically installed on the first nozzle for forming a gas-liquid mixture of carbon dioxide gas and lithium hydroxide solution. A first pipe extends outward from the first mixing chamber. The first pipe is horizontally installed on the first mixing chamber.

[0010] As a further elaboration, a jacket extends outward from the first pipe. The jacket is vertically installed on the housing for cooling and freezing the reacted raw materials. A carbonization reaction tower extends outward from the jacket. The carbonization reaction tower is vertically installed on the jacket for carrying out a carbonization reaction between carbon dioxide gas and lithium hydroxide solution.

[0011] As a further elaboration, a second rotary jet carbonator is provided extending outward from the housing. The second rotary jet carbonator is vertically installed on the housing and is used to shear the lithium hydroxide solution and carbon dioxide gas-liquid to form a pseudo-homogeneous gas-liquid foam flow. A second nozzle is provided extending outward from the second rotary jet carbonator, and the second nozzle is vertically installed on the second rotary jet carbonator.

[0012] As a further elaboration, a second mixing chamber is provided extending outward from the second nozzle. The second mixing chamber is vertically installed on the second nozzle and is used to form a gas-liquid mixture of carbon dioxide gas and lithium hydroxide solution. A second pipeline is provided extending outward from the second mixing chamber. The second pipeline is horizontally installed on the carbonation reaction tower and penetrates through it.

[0013] As a further elaboration, the control mechanism includes a first transfer pipeline and a second transfer pipeline. The first transfer pipe is installed at one end of the lithium hydroxide solution storage tank and is used to transfer the lithium hydroxide solution inside the lithium hydroxide solution storage tank. The second transfer pipe is vertically installed on the carbon dioxide storage tank and is used to transfer the carbon dioxide gas inside the carbon dioxide storage tank.

[0014] As a further elaboration, an electric control valve is provided extending outward from the second transfer pipe. The electric control valve is vertically installed on the second transfer pipe. A pressure measuring gauge is provided extending outward from the electric control valve. The pressure measuring gauge is vertically installed on the electric control valve. The electric control valve and the pressure measuring gauge are used to keep the pressure inside the carbonation reaction tower constant.

[0015] In summary, the present utility model has the following beneficial effects: The lithium hydroxide jet carbonation device of the present utility model realizes the efficient mixing of the lithium hydroxide solution and carbon dioxide gas-liquid by introducing a rotary jet carbonator, forming a pseudo-homogeneous gas-liquid foam flow, which greatly increases the gas-liquid contact area and thus significantly improves the efficiency of the carbonation reaction. Compared with the traditional process, this device can achieve a higher reaction conversion rate in a shorter time, improving the production efficiency. By setting the jacket, the problem of product sticking to the wall during the carbonation reaction is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a lithium hydroxide jet carbonation device of the present utility model;

[0017] Figure 2 is an enlarged schematic diagram of part A of a lithium hydroxide jet carbonation device of the present utility model;

[0018] Figure 3 is an enlarged schematic diagram of part B of a lithium hydroxide jet carbonation device of the present utility model.

[0019] Reference numerals in the figure: 10, raw material mechanism, 101, lithium hydroxide solution storage tank; 102, carbon dioxide storage tank; 20, conversion mechanism, 201, circulation pump; 202, heat exchanger; 30, reaction mechanism, 301, first rotary jet carbonator; 302, first nozzle; 303, first mixing chamber; 304, first pipeline; 305, second rotary jet carbonator; 306, second nozzle; 307, second mixing chamber; 308, second pipeline; 309, jacket; 310, carbonation reaction tower; 311, housing; 40, control mechanism, 401, pressure gauge; 402, electric control valve; 403, first transmission pipeline; 404, second transmission pipeline. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figures 1-3 shown, a lithium hydroxide jet carbonation device includes a raw material mechanism, a conversion mechanism, a reaction mechanism and a control mechanism. The conversion mechanism is vertically installed on the raw material mechanism for converting the raw materials inside the raw material mechanism. The reaction mechanism is vertically installed on the conversion mechanism for reacting the raw materials converted by the conversion mechanism. The control mechanism is vertically installed on the reaction mechanism for controlling the inside of the reaction mechanism. The raw material mechanism includes a lithium hydroxide solution storage tank 101 and a carbon dioxide storage tank 102. The lithium hydroxide solution storage tank 101 is installed at one end of the conversion mechanism, and the lithium hydroxide solution storage tank 101 is connected to the conversion mechanism. The carbon dioxide storage tank 102 is installed at one end of the reaction mechanism, and the carbon dioxide storage tank 102 is connected to the reaction mechanism.

[0022] A circulation pump 201 extends outward from the lithium hydroxide solution storage tank 101. The circulation pump 201 is installed at one end of the lithium hydroxide solution storage tank 101, and the circulation pump 201 is connected to the lithium hydroxide solution storage tank 101. A heat exchanger 202 extends outward from the circulation pump 201. The heat exchanger 202 is installed at one end of the circulation pump 201, and the heat exchanger 202 is connected to the circulation pump 201 for cooling the lithium hydroxide solution by heat exchange. The lithium hydroxide solution storage tank 101 is located at one end of the circulation pump 201.

[0023] Specifically, lithium hydroxide solution and carbon dioxide are stored in a lithium hydroxide solution storage tank 101 and a carbon dioxide storage tank 102 respectively. When production starts, the lithium hydroxide solution is pumped out by a circulation pump 201 in the raw material mechanism and sent to a heat exchanger 202 for temperature reduction treatment. The cooled lithium hydroxide solution is then transported to the conversion mechanism.

[0024] The reaction mechanism includes a housing 311 and a first rotary jet carbonator 301. The first rotary jet carbonator 301 is vertically installed in the housing 311 and is used to shear the lithium hydroxide solution and carbon dioxide gas-liquid mutually to form a quasi-homogeneous gas-liquid foam flow. The carbon dioxide storage tank 102 is located at one end of the housing 311.

[0025] The first rotary jet carbonator 301 extends outwardly with a first nozzle 302. The first nozzle 302 is vertically installed on the first rotary jet carbonator 301. The first nozzle 302 extends outwardly with a first mixing chamber 303. The first mixing chamber 303 is vertically installed on the first nozzle 302 and is used to form a gas-liquid mixture of carbon dioxide gas and lithium hydroxide solution. The first mixing chamber 303 extends outwardly with a first pipe 304. The first pipe 304 is horizontally installed on the first mixing chamber 303.

[0026] Specifically, when the lithium hydroxide solution enters the first rotary jet carbonator 301, the carbonator uses the shearing force generated by high-speed rotation to mix the lithium hydroxide solution with the carbon dioxide gas that comes from the carbon dioxide storage tank 102 and is precisely controlled by a second transmission pipe 404, an electric control valve 402, and a pressure gauge 401. During the mixing process, the two form a quasi-homogeneous gas-liquid foam flow, greatly increasing the gas-liquid contact area and promoting the progress of the carbonization reaction. The mixed gas-liquid mixture enters the first mixing chamber 303, and after further uniform mixing, it enters the jacket 309 through the first pipe 304.

[0027] The first pipe 304 extends outwardly with a jacket 309. The jacket 309 is vertically installed in the housing 311 and is used to cool and freeze the reacted raw materials to solve the problem of lithium carbonate product sticking to the wall. The jacket 309 extends outwardly with a carbonization reaction tower 310. The carbonization reaction tower 310 is vertically installed on the jacket 309 and is used to carry out the carbonization reaction of carbon dioxide gas and lithium hydroxide solution.

[0028] Specifically, the jacket 309, as a cooling device, cools the reacted raw materials to prevent the product from sticking to the wall in the subsequent process. The cooled raw materials then enter the carbonization reaction tower 310 to complete the final carbonization reaction in the tower.

[0029] The housing 311 is externally provided with a second rotary jet carbonator 305, which is vertically installed on the housing 311 and is used to shear the lithium hydroxide solution and carbon dioxide gas-liquid to form a pseudo-homogeneous gas-liquid foam flow. The second rotary jet carbonator 305 is externally provided with a second nozzle 306, and the second nozzle 306 is vertically installed on the second rotary jet carbonator 305.

[0030] The second nozzle 306 is externally provided with a second mixing chamber 307, which is vertically installed on the second nozzle 306 and is used to form a gas-liquid mixture of carbon dioxide gas and lithium hydroxide solution. The second mixing chamber 307 is externally provided with a second pipeline 308, and the second pipeline 308 is horizontally installed on the carbonation reaction tower 310 and penetrates through it.

[0031] Specifically, in order to further improve the reaction efficiency and uniformity, the reaction mechanism is also equipped with a second rotary jet carbonator 305. This carbonator works in a similar way, mixing more lithium hydroxide solution with carbon dioxide gas, and sending the mixture to different positions of the carbonation reaction tower 310 through the second mixing chamber 307 and the second pipeline 308 to ensure that the carbonation reaction can be fully carried out in each area of the reaction tower.

[0032] The control mechanism includes a first transfer pipeline 403 and a second transfer pipeline 404. The first transfer pipe is installed at one end of the lithium hydroxide solution storage tank 101 and is used to transfer the lithium hydroxide solution inside the lithium hydroxide solution storage tank 101. The second transfer pipe is vertically installed on the carbon dioxide storage tank 102 and is used to transfer the carbon dioxide gas inside the carbon dioxide storage tank 102.

[0033] Specifically, the first transfer pipeline 403 is responsible for transporting the lithium hydroxide solution from the storage tank to the reaction mechanism, while the second transfer pipeline 404 is responsible for transporting the carbon dioxide gas from the storage tank to the reaction mechanism, and keeping the pressure in the reaction tower constant through the electric control valve 402 and the pressure measuring instrument 401. This automatic control ensures the stability and reliability of the reaction process.

[0034] The second transfer pipe is externally provided with an electric control valve 402, which is vertically installed on the second transfer pipe. The electric control valve 402 is externally provided with a pressure measuring instrument 401, which is vertically installed on the electric control valve 402. The electric control valve 402 and the pressure measuring instrument 401 are used to control the pressure in the carbonation reaction tower 310 to remain constant.

[0035] Specifically, by adjusting control elements such as the electric control valve 402 and the pressure measuring instrument 401, the operator can easily adjust the process parameters to meet different production requirements.

[0036] When producing lithium carbonate, first, carbon dioxide gas is filled into a container to make the container in a carbon dioxide atmosphere. The lithium hydroxide solution in the lithium hydroxide storage tank is input into the circulation pump 201 through the circulation pump 201. After heat exchange and cooling in the heat exchanger 202, the lithium hydroxide solution falls into the first rotary jet carbonator 301 by itself from a high position and generates negative pressure, and then is sprayed out at high speed through a nozzle to generate vacuum. The carbon dioxide gas is sucked into the first mixing chamber 303 by using the vacuum. The sucked carbon dioxide gas and the lithium hydroxide solution form a gas-liquid mixture, and the gas-liquid mixture is sprayed into the carbonization reaction tower 310 through the first pipeline 304 for carbonization reaction; an electric control valve 402 is arranged on the carbon dioxide inlet pipeline of the carbonization reaction tower 310, and the electric control valve 402 and the pressure gauge 401 are interlocked and controlled through a control system (not shown). The pressure in the carbonization reaction tower 310 is controlled to be constant, so that the use of carbon dioxide is not wasted. After the reaction is completed, cooling and freezing are carried out through the jacket 309, or intermittent freezing is carried out during the reaction process to solve the problem of the lithium carbonate product sticking to the wall, which is applicable to different working conditions and brings a better application prospect.

[0037] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0038] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lithium hydroxide jet carbonization device, characterized in that: Including raw material institutions; A transformation mechanism, which is vertically mounted on the raw material mechanism and is used to transform the raw materials inside the raw material mechanism; A reaction mechanism, the reaction mechanism is vertically mounted on the conversion mechanism and is used to react the raw materials converted by the conversion mechanism; A control mechanism, which is vertically mounted on the reaction mechanism and is used to control the interior of the reaction mechanism; The raw material mechanism includes a lithium hydroxide solution storage tank and a carbon dioxide storage tank, the lithium hydroxide solution storage tank is installed at one end of the conversion mechanism, the lithium hydroxide solution storage tank is connected to the conversion mechanism, the carbon dioxide storage tank is installed at one end of the reaction mechanism, the carbon dioxide storage tank is connected to the reaction mechanism, the lithium hydroxide solution storage tank is provided with a circulation pump extending outward, the circulation pump is installed at one end of the lithium hydroxide solution storage tank, the circulation pump is connected to the lithium hydroxide solution storage tank, the circulation pump is provided with a heat exchanger extending outward, the heat exchanger is installed at one end of the circulation pump, the heat exchanger is connected to the circulation pump, and is used to perform heat exchange and cooling of the lithium hydroxide solution, the lithium hydroxide solution storage tank is located at one end of the circulation pump; The reaction mechanism comprises a shell and a first rotary jet carbonizer, wherein the first rotary jet carbonizer is vertically mounted on the shell and is used to shear the lithium hydroxide solution and the carbon dioxide gas and liquid against each other to form a quasi-homogeneous gas-liquid foam flow, and the carbon dioxide storage tank is located at one end of the shell; The first rotary jet carbonizer is provided with a first nozzle extending outwardly, the first nozzle is vertically mounted on the first rotary jet carbonizer, the first nozzle is provided with a first mixing chamber extending outwardly, the first mixing chamber is vertically mounted on the first nozzle, and is used to mix carbon dioxide gas and lithium hydroxide solution to form a gas-liquid mixture, the first mixing chamber is provided with a first pipeline extending outwardly, the first pipeline is horizontally mounted on the first mixing chamber; The first pipeline is extended outwardly to be provided with a jacket, the jacket is vertically installed on the shell, and is used to cool and freeze the raw materials after the reaction. The jacket is extended outwardly to be provided with a carbonization reaction tower, the carbonization reaction tower is vertically installed on the jacket, and is used to carbonize carbon dioxide gas with lithium hydroxide solution.

2. A lithium hydroxide jet carbonization device according to claim 1, characterized in that: A second rotary jet carbonizer is provided outwardly from the shell, and the second rotary jet carbonizer is vertically installed on the shell, and is used to shear the lithium hydroxide solution and the carbon dioxide gas and liquid against each other to form a quasi-homogeneous gas-liquid foam flow. A second nozzle is provided outwardly from the second rotary jet carbonizer, and the second nozzle is vertically installed on the second rotary jet carbonizer.

3. A lithium hydroxide injection carbonization device according to claim 2, characterized in that A second mixing chamber is provided outwardly from the second nozzle, and the second mixing chamber is vertically installed on the second nozzle for mixing carbon dioxide gas with lithium hydroxide solution to form a gas-liquid mixture. A second pipe is provided outwardly from the second mixing chamber, and the second pipe is horizontally installed on the carbonization reaction tower and passes through it.

4. A lithium hydroxide jet carbonization device according to claim 1, characterized in that: The control mechanism includes a first transmission pipe and a second transmission pipe. The first transmission pipe is installed at one end of the lithium hydroxide solution storage tank for transmitting the lithium hydroxide solution inside the lithium hydroxide solution storage tank. The second transmission pipe is vertically installed on the carbon dioxide storage tank for transmitting the carbon dioxide gas inside the carbon dioxide storage tank.

5. A lithium hydroxide jet carbonization device according to claim 4, characterized in that: An electric regulating valve is provided outwardly from the second transmission pipe, and the electric regulating valve is vertically installed on the second transmission pipe. A pressure measuring gauge is provided outwardly from the electric regulating valve, and the pressure measuring gauge is vertically installed on the electric regulating valve. The electric regulating valve and the pressure measuring gauge are used to control the pressure in the carbonization reaction tower to remain constant.

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