Gas-making reactor for lithium hexafluorophosphate

Abstract

A gas-making reactor for lithium hexafluorophosphate comprises a gas-making reaction tank and a gear motor, a rotating shaft is rotatably mounted in the gas-making reaction tank and arranged along the axis of the gas-making reaction tank, a spindle of the gear motor is connected with the end of the rotating shaft through a coupler, and a helical ribbon is arranged on the rotating shaft; in conclusion, liquid is dispersed by the liquid distributors and enters the gas-making reaction tank, the concentration distribution is more uniform, the contact area of a liquid phase and a solid material is maximized through the two groups of liquid distributors, a good mass transfer effect is achieved, and the reaction is more sufficient.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium hexafluorophosphate production equipment, and in particular relates to a gasification reactor used for lithium hexafluorophosphate. Background Art

[0002] Lithium hexafluorophosphate is an electrolyte with good comprehensive performance and is the main component of lithium-ion battery electrolyte. It can make lithium batteries have higher energy density and cycle capacity, lower self-discharge rate and longer warranty period. It is a key material that affects various performance indicators of lithium batteries. However, lithium-ion batteries have very high requirements for the purity of lithium hexafluorophosphate. The electrolyte made of lithium hexafluorophosphate containing impurities will cause the internal resistance of lithium batteries to increase and the battery capacity to decay too quickly, and the safety of the battery cannot be guaranteed. Therefore, the purity of lithium hexafluorophosphate determines the quality of lithium-ion batteries. However, lithium hexafluorophosphate has low thermal stability, high hygroscopicity and easy hydrolysis, which greatly increases the difficulty and uncertainty of obtaining high-purity lithium hexafluorophosphate. Therefore, the preparation of high-purity lithium hexafluorophosphate depends on the preparation process of lithium hexafluorophosphate and the control of the preparation process.

[0003] At present, the synthesis methods of lithium hexafluorophosphate mainly include gas-solid phase reaction method, organic solvent method, hydrofluoric acid solvent method, etc. Most domestic and foreign manufacturers of lithium hexafluorophosphate adopt hydrofluoric acid solvent method. From a process point of view, the hydrofluoric acid solvent method for producing lithium hexafluorophosphate mostly adopts an intermittent process. Compared with the continuous process, the intermittent process has the defects of low raw material utilization rate, long single batch production cycle, difficult to judge the reaction endpoint, large equipment investment, easy blockage of phosphorus pentafluoride feed conduit, and high safety risk of clearing blockage. In addition, the preparation process of hydrofluoric acid solvent method is mostly connected by pipelines or pipelines filled with fillers, and the uniform distribution of liquid materials is not considered. The reaction between liquid and solid is insufficient, the equipment synthesis efficiency is low, and the industrial application is difficult. Utility Model Content

[0004] The utility model aims to provide a gasification reactor for lithium hexafluorophosphate, which solves the technical problems of not considering uniform distribution of liquid phase materials, insufficient reaction between liquid phase and solid, and low synthesis efficiency of equipment in the existing hydrofluoric acid solvent preparation process.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A gasification reactor for lithium hexafluorophosphate, comprising a gasification reaction tank and a reduction motor, wherein a rotating shaft is rotatably installed in the gasification reaction tank, the rotating shaft is arranged along the axis of the gasification reaction tank, the main shaft of the reduction motor is connected to the end of the rotating shaft through a coupling, and a spiral belt is arranged on the rotating shaft;

[0007] A solid feeding port and a reaction gas outlet are arranged at the top of the gasification reaction tank, a slag discharge port is arranged at the bottom of the gasification reaction tank, and two groups of liquid distributors are also arranged at the top of the gasification reaction tank. The liquid distributors are connected to external interfaces, and the bottom of the liquid distributors are connected to a plurality of liquid adding pipes, which all extend into the gasification reaction tank.

[0008] Furthermore, the bottom of the liquid adding pipe is in a blocked shape, and a liquid outlet hole is provided on the side wall of the lower end of the liquid adding pipe, and the liquid outlet hole faces the inner wall of the gas making reaction tank.

[0009] Compared with the prior art, the beneficial effects of the utility model are: the liquid of the utility model is dispersed into the gasification reaction tank through the liquid distributor, the concentration distribution is more uniform, and the contact area between the liquid phase and the solid material is maximized through two groups of liquid distributors, which has a good mass transfer effect and a more complete reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0011] Figure 1 This is a schematic structural diagram of a gasification reactor for lithium hexafluorophosphate according to the utility model;

[0012] Figure 2 This is a top view of a gasification reactor for lithium hexafluorophosphate according to the utility model;

[0013] Figure 3 is a cross-sectional view of a gasification reactor for lithium hexafluorophosphate;

[0014] Figure 4 It is a schematic diagram of the structure of the liquid adding tube. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] The present invention is further described in detail below in conjunction with the embodiments.

[0017] like Figure 1-4 As shown, a specific embodiment of a gasification reactor for lithium hexafluorophosphate provided by the utility model:

[0018] A gasification reactor for lithium hexafluorophosphate, comprising a gasification reaction tank 1 and a reduction motor 2, wherein a rotating shaft 3 is rotatably installed in the gasification reaction tank 1, and the rotating shaft 3 is arranged along the axis of the gasification reaction tank 1, and the main shaft of the reduction motor 2 is connected to the end of the rotating shaft 3 through a coupling 4, and a screw belt 5 is arranged on the rotating shaft 3;

[0019] The top of the gasification reaction tank 1 is provided with a solid feeding port 6 and a reaction gas outlet 7, the bottom of the gasification reaction tank 1 is provided with a slag discharge port 8, and two groups of liquid distributors 9 are also provided on the top of the gasification reaction tank 1. The liquid distributor 9 is connected to an external interface 10, and the bottom of the liquid distributor 9 is connected to a plurality of liquid adding pipes 11, and the liquid adding pipes 11 are all extended into the gasification reaction tank 1, such as Figure 4 As shown, the bottom of the liquid adding pipe 11 is in a blocked shape, and a liquid outlet 12 is provided on the side wall of the lower end of the liquid adding pipe 11 , and the liquid outlet 12 faces the inner wall of the gas generating reaction tank 1 .

[0020] The working process of the gasification reactor for lithium hexafluorophosphate of this embodiment is as follows: first, the external interface 10 of the liquid distributor 9 is connected to the liquid source, and then the solid material is added to the gasification reaction tank 1 from the solid feeding port 6, and the reduction motor 2 is started to drive the screw belt 5 to rotate and stir, and then the liquid flows out from the liquid source and flows into each liquid adding pipe 11 through the liquid distributor 9, and then is sprayed out from the liquid outlet and added to the gasification reaction tank 1 evenly and continuously, and the liquid reacts with the solid material, and the produced gas is discharged from the reaction gas outlet 7. After the reaction is completed, the remaining residue is discharged from the slag discharge port 8.

[0021] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0022] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gasification reactor for lithium hexafluorophosphate, characterized in that: It includes a gas-making reaction tank and a reduction motor. A rotating shaft is rotatably installed in the gas-making reaction tank. The rotating shaft is arranged along the axis of the gas-making reaction tank. The main shaft of the reduction motor is connected to the end of the rotating shaft through a coupling. A spiral belt is arranged on the rotating shaft. A solid feeding port and a reaction gas outlet are arranged at the top of the gasification reaction tank, a slag discharge port is arranged at the bottom of the gasification reaction tank, and two groups of liquid distributors are also arranged at the top of the gasification reaction tank. The liquid distributors are connected to external interfaces, and the bottom of the liquid distributors are connected to a plurality of liquid adding pipes, which all extend into the gasification reaction tank.

2. A gasification reactor for lithium hexafluorophosphate according to claim 1, characterized in that: The bottom of the liquid adding pipe is in a blocked shape, and a liquid outlet hole is provided on the side wall of the lower end of the liquid adding pipe, and the liquid outlet hole faces the inner wall of the gas making reaction tank.

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