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Double-discharge-pipe vortex sedimentation device

A settling device and double-row pipe technology, which is applied in the direction of separating sediments, structural parts, electrical components, etc. by centrifugal force, can solve problems affecting cycle and rate performance, reduced production capacity, filter element loss, etc., to improve patency and increase production capacity , the effect of reducing overflow loss

Active Publication Date: 2020-12-11
JINCHI ENERGY MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium battery ternary cathode material precursors are usually prepared by a wet method. The common method is the continuous co-precipitation method of controlled crystalline hydroxide. The structure cannot be arranged regularly in a certain direction, and there are many fine powders, which cause lithium ions in the positive electrode material to be difficult to deintercalate and cations to be mixed, which affects the cycle and rate performance, and the electrical performance of the battery cannot be further improved.
[0003] The precursor produced by the batch method using the existing settling equipment only relies on its own gravity to settle to realize the discharge of the supernatant, and some materials are directly discharged with the supernatant, resulting in a decrease in production capacity. Although adding concentration equipment can solve the problem of discharging the material with the supernatant , but the investment is large, the loss of the filter element is serious during use, and it is not easy to clean during the changeover process, which greatly affects the production efficiency

Method used

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  • Double-discharge-pipe vortex sedimentation device
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Provide a double-tube vortex settling device suitable for the preparation of lithium battery ternary cathode material precursor materials, such as figure 1 As shown, it comprises a synthesis tank 1 and a settling tank 2. The synthesis tank 1 is provided with an agitator 3 and two baffles 4 whose sides are respectively connected with the synthesis tank tank wall. The agitator 3 is at the central axis of the synthesis tank 1. The edge of the baffle plate 4 near the bottom of the synthesis tank 1 can be used for the circulation of the solution in the synthesis tank on both sides of the baffle plate 4, that is, the baffle plate divides the synthesis tank into two interconnected spaces at the bottom; A first interface 11 and a second interface 12 are respectively provided on the tank wall, wherein the first interface 11 and the agitator 3 are located on the same side of the baffle plate 4, and the first interface 11 is in front of the stirring direction of the agitator, that ...

Embodiment 2

[0030] The difference between this embodiment and Embodiment 1 is: the cone angle of the conical bottom of the settling tank is 60︒; the pigging pipe is arranged at the 2 / 3 height from the bottom to the top of the cylindrical end of the settling tank; The length of the inner extension is 10% of the radius of the cylinder end; the radius R1 of the first tube and the radius R2 of the second tube satisfy R1=2 / 3R2; the height of the second interface is 5cm below the height of the first interface. figure 2 The good effect of the vortex settling of this embodiment is shown.

Embodiment 3

[0032] The difference between this embodiment and Embodiment 1 is that: the first interface and the second interface are set at the same height and are at the stirring height; The two ends are respectively connected with the second interface and the first inlet; the cone angle of the conical bottom of the settling tank is 65︒; the pigging pipe is set at the 3 / 5 height from the bottom to the top of the cylindrical end of the settling tank; the end of the pigging pipe The protruding length in the settling tank is 50% of the radius of the cylinder end; the radius R1 of the first row pipe and the radius R2 of the second row pipe satisfy R1=4 / 5R2.

[0033] When working, as the liquid level in the synthesis tank rises, the synthesis tank and the settling tank are first connected through the first row of pipes to prevent the liquid level of the synthesis tank from emerging. When the liquid level rises further, the second row of pipes connects the synthesis tank and the settling tank. ...

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Abstract

The invention relates to the technical field of material preparation, and discloses a double-discharge-pipe vortex sedimentation device, which comprises a synthesis tank and a sedimentation tank, wherein a stirrer and a baffle with two side edges connected with the tank wall of the synthesis tank are arranged in the synthesis tank, a first connector and a second connector are arranged on the tankwalls, which are located on the two sides of the baffle, of the synthesis tank respectively, the first connector and the stirrer are located on the same side of the baffle, the edge, which is close tothe bottom of the synthesis tank, of the baffle can allow a solution in the synthesis tank to circulate on the two sides of the baffle, the bottom of the sedimentation tank is a conical bottom, a first inlet and a second inlet with height difference are formed in the conical surface of the conical bottom, the setting height of the first inlet is higher than that of the second interface, the firstconnector and the second connector are communicated with the first inlet and the second inlet through discharge pipes in pairs, and a cleaning pipe is arranged on the groove wall of the non-conical end of the sedimentation tank. According to the device, the precursor material can sink in a vortex manner, the smoothness of the sedimentation tank and the synthesis tank is improved, the overflow loss of the material can be reduced when the supernatant is guided by the clearing pipe, and the productivity is effectively improved.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a double-row tube vortex settling device. Background technique [0002] Lithium battery ternary cathode material precursors are usually prepared by a wet method. The common method is the continuous co-precipitation method of controlled crystalline hydroxide. The structure cannot be arranged regularly in a certain direction, and there are many fine powders, which cause lithium ions in the positive electrode material to be difficult to deintercalate and cations to be easily mixed, which affects the cycle and rate performance, and the electrical performance of the battery cannot be further improved. [0003] The precursor produced by the batch method using the existing settling equipment only relies on its own gravity to settle to realize the discharge of the supernatant, and some materials are directly discharged with the supernatant, resulting in a decrease in product...

Claims

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Application Information

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IPC IPC(8): B01D21/26B01J19/18H01M4/485H01M4/505H01M4/525
CPCB01D21/26B01J19/18H01M4/485H01M4/505H01M4/525Y02E60/10
Inventor 苏帅张海艳胡志兵何绪锋朱璟胡海诗孟立君熊意球张娉婷朱凯刘进周春仙
Owner JINCHI ENERGY MATERIALS CO LTD