Device for preparing ternary material precursor by intermittently combining discharging and separating kettles

Abstract

The utility model discloses a device for preparing a ternary material precursor by intermittently combining discharging and separating kettles, and relates to the technical field of battery production. The device comprises a storage tank, a transfer cavity, a growth kettle and a conveying auger, the bottom end of the storage tank is fixedly communicated with a conveying pipe, the bottom end of the conveying pipe is fixedly communicated with a conveying pump, the bottom end of the conveying pump is fixedly communicated with a bottom pipe, the bottom end of the bottom pipe is fixedly communicated with the transfer cavity, and the periphery of the transfer cavity is fixedly communicated with six fixing pipes in an annular array mode. The ends, away from the transfer cavity, of the six fixing pipes fixedly communicate with growth kettles, the ends, away from the growth kettles, of the three-way pipes fixedly communicate with material conveying augers, and a weighing platform is arranged below each growth kettle. According to the device, the storage tank, the transfer cavity, the growth kettle and the conveying auger are arranged, so that the problems that when a plurality of reaction kettles are used together, the growth of particles is not uniform enough, and the mixing sufficiency of seed crystals and a growing solution is not good enough are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, in particular to a device for preparing a ternary material precursor by intermittently combining discharge and separate kettles. Background Art

[0002] Ternary material precursor (ternary precursor for short) is the main raw material for preparing ternary positive electrode materials, and it is generally prepared by precipitation method. In the lithium battery positive electrode industry chain, the final performance of the positive electrode material will inherit the morphological and structural characteristics of its precursor. The quality of the precursor (morphology, particle size, particle size distribution, specific surface area, impurity content, tap density, etc.) directly determines the physical and chemical indicators of the positive electrode sintering product. The common industrial crystallization methods for preparing narrow particle sizes include single-pot intermittent method, multi-stage series intermittent method, mother-child semi-continuous semi-intermittent method, etc., which can well eliminate the need to use different methods to control the growth of particles, but the device for preparing ternary material precursors still has the following disadvantages in actual use:

[0003] In the process of preparing the ternary material precursor, in order to increase the production efficiency, multiple reactors are usually used for growth. During the operation, the particles grown in different reactors have slightly different components when the growth solution is mixed, and the particle sizes of the particles grown in the same batch are different, which affects the uniformity of the produced particles.

[0004] During the operation of the device for preparing the ternary material precursor, the seeds and the growth solution are directly mixed to grow the particles. During the operation, the seeds and the growth solution of the seeds are directly transported and then mixed. The seeds and the growth solution are not mixed sufficiently, resulting in uneven particle growth during operation. Utility Model Content

[0005] The purpose of the utility model is to provide a device for preparing a ternary material precursor by intermittently combining discharge and separate kettles. By arranging a storage tank, a transfer chamber, a growth kettle and a feeding auger, the problems of uneven particle growth and insufficient mixing of seed crystals and growing solution when multiple reactors are used together in the device for preparing a ternary material precursor are solved.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a device for preparing a ternary material precursor by intermittently combining discharge and separation, comprising a storage tank, a transfer chamber, a growth kettle and a feeding auger, wherein the bottom end of the storage tank is fixedly connected with a delivery pipe, the bottom end of the delivery pipe is fixedly connected with a delivery pump, the bottom end of the delivery pump is fixedly connected with a bottom pipe, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the outer periphery of the transfer chamber is fixedly connected with six fixed pipes in an annular array, the ends of the six fixed pipes away from the transfer chamber are all fixedly connected with the growth kettle, ... bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixedly connected with the transfer chamber, the bottom end of the bottom pipe is fixed A three-way pipe is fixedly connected to the lower sides of the two growth kettles on one side of the tank, and a feeding auger is fixedly connected to the end of the three-way pipe away from the growth kettle. A weighing platform is arranged under each growth kettle. When working, the mixture of the growing seeds and the slurry is temporarily stored in the storage tank, and the slurry formed by the mixture of the seeds and the growth solution transported by the delivery pump is transferred through the transfer chamber. After the slurry is contained in the growth kettle, the seeds are grown, and the seeds and the growth solution of the seeds are transported to the growth kettle through the feeding auger.

[0008] Furthermore, a ventilation pipe is fixedly connected to the top of the storage tank, a ventilation valve is fixed on the peripheral side of the ventilation pipe, and the storage tank controls the high pressure and low pressure in the storage tank through the ventilation pipe and the ventilation valve.

[0009] Furthermore, support rods are fixed in a circular array at the bottom edge of the storage tank, and the support rods are arranged between the fixed pipes. The storage tank is supported on the ground by the support rods.

[0010] Furthermore, an electric control valve is fixed on the circumference of each of the fixed pipes, and the electric control valve is arranged in the middle of the fixed pipe, and the fixed pipe is controlled to be on and off by the electric control valve.

[0011] Furthermore, an output pipe is fixedly connected to the center of the bottom end of the growth kettle, and fixed rods are fixed in a circular array at the bottom end of the growth kettle outside the output pipe. All the fixed rods at the bottom end of each growth kettle are fixed together to the top of the scale platform at the bottom thereof. The growth kettle outputs the particles that have completed growth therein through the output pipe and is supported on the top of the scale platform by the fixed rods.

[0012] Furthermore, a material pipe 1 is fixed to one end of the upper part of the feed auger away from the storage tank, and a material pipe 2 is fixedly connected to the lower part of the feed auger at a position symmetrical to the material pipe 1. The feed auger transports the seeds and the solution for seed growth into the seeds through the material pipes 1 and 2.

[0013] The utility model has the following beneficial effects:

[0014] The utility model solves the problem of uneven particle growth when a plurality of reactors are used together in a device for preparing a ternary material precursor by arranging a storage tank, a transfer chamber and a growth kettle. During operation, after the storage of slurry in the storage tank is completed, the delivery pump is started to suck the slurry in the storage tank, and the slurry is delivered to the transfer chamber through the bottom pipe, and then delivered to the remaining four fixed pipes through the transfer chamber, and then delivered to the remaining four growth kettles through the remaining four fixed pipes. The reading on the scale is observed, and the switches of the various electric control valves are adjusted at the same time until the readings on the scales below the various growth kettles are consistent, thereby completing the batching work and making the growth of particles in the various growth kettles more uniform during operation.

[0015] The utility model solves the problem of insufficient mixing of the crystal seed and the growth solution in the device of the ternary material precursor by arranging a growth kettle and a feeding auger. When working, the feeding pipe 1 is connected with the aging kettle for conveying the crystal seed, and the connecting pipe 2 is connected with the pipeline for conveying the crystal seed growth solution, so that when working, the crystal seed and the crystal seed growth solution are conveyed to the feeding auger, continuously mixed in the feeding auger and conveyed to the single-way pipe, and then conveyed to the two growth kettles through the three-way pipe, so that the crystal seed and the growth solution in the device of the ternary material precursor are better mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a stereoscopic diagram of the assembly structure of a device for preparing a ternary material precursor by combining intermittent discharge and separate kettles;

[0018] Figure 2 It is a three-dimensional diagram of the storage tank structure;

[0019] Figure 3 It is a three-dimensional diagram of the transfer cavity structure;

[0020] Figure 4 It is a three-dimensional diagram of the growth kettle structure;

[0021] Figure 5 This is a three-dimensional diagram of the feed auger structure.

[0022] Reference numerals:

[0023] 1. Storage tank; 101. Delivery pipe; 102. Delivery pump; 103. Bottom pipe; 104. Support rod; 105. Ventilation pipe; 106. Ventilation valve; 2. Transfer chamber; 201. Fixed pipe; 202. Electric control valve; 3. Growth kettle; 301. Fixed rod; 302. Scale platform; 303. Output pipe; 304. Three-way pipe; 4. Feeding auger; 401. Material pipe one; 402. Material pipe two. DETAILED DESCRIPTION

[0024] 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 of 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. Specific embodiment 1

[0025] See also Figure 1-5The utility model is a device for preparing a ternary material precursor by intermittently combining discharge and separation, comprising a storage tank 1, a transfer chamber 2, a growth kettle 3 and a feeding auger 4. The bottom end of the storage tank 1 is fixedly connected with a delivery pipe 101. The storage tank 1 temporarily stores the slurry required for the growth action in the growth kettle 3 and delivers it to a delivery pump 102 through the delivery pipe 101. The bottom end of the delivery pipe 101 is fixedly connected with a delivery pump 102. The bottom end of the delivery pump 102 is fixedly connected with a bottom pipe 103. The bottom end of the bottom pipe 103 is fixedly connected with a transfer chamber 2. The outer periphery of the transfer chamber 2 is fixedly connected with six The fixed pipe 201, one end of the six fixed pipes 201 away from the transfer chamber 2 is fixedly connected to the growth kettle 3, the lower peripheral side of the two growth kettles 3 on one side of the storage tank 1 is fixedly connected to a three-way pipe 304, and the end of the three-way pipe 304 away from the growth kettle 3 is fixedly connected to a feeding screw 4, and the growing solution and crystal seeds are transported to the three-way pipe 304 through the feeding screw 4. A weighing platform 302 is arranged under each growth kettle 3. When the slurry is transported, it is necessary to input the slurry in the two growth kettles 3 connected with the three-way pipe 304 into the storage tank 1, and the two growth kettles 3 connected with the three-way pipe 304 are opened. The electric control valve 202 on the side fixed pipe 201 is closed, and the electric control valve 202 on the other fixed pipes 201 is closed, and the delivery pump 102 is started. The input end of the delivery pump 102 generates negative pressure, and the negative pressure will generate negative pressure in the fixed pipe 201, sucking the slurry in the growth kettle 3 into the transfer chamber 2, and then inputting it into the delivery pump 102 through the bottom pipe 103, inputting it into the delivery pipe 101 through the delivery pump 102, and outputting it to the storage tank 1 through the delivery pipe 101. When the slurry is stored in the storage tank 1, observe the readings on each scale 302, and close the output end of the aging kettle connected to the delivery auger 4. Valve, close the electric control valve 202 on the two outer fixed pipes 201 of the growth kettle 3 connected to the three-way pipe 304, open the remaining electric control valves 202, start the delivery pump 102, suck the slurry in the storage tank 1, and deliver it to the transfer chamber 2 through the bottom pipe 103, and deliver it to the remaining four fixed pipes 201 through the transfer chamber 2, and deliver it to the remaining four growth kettles 3 through the remaining four fixed pipes 201, observe the reading of the scale 302, and adjust the switches of each electric control valve 202 at the same time, until the readings on the scales 302 under each growth kettle 3 are consistent, and the batching work is completed.

[0026] Specifically, the top of the storage tank 1 is fixedly connected to a vent pipe 105, and a vent valve 106 is fixed around the vent pipe 105. The top of the storage tank 1 is connected to the atmosphere through the vent pipe 105, and the on and off of the storage tank 1 is controlled by the vent valve 106.

[0027] Furthermore, support rods 104 are fixed in a circular array at the bottom edge of the storage tank 1 . The support rods 104 are arranged between the fixed pipes 201 . The storage tank 1 is supported on the ground by the support rods 104 .

[0028] Furthermore, an electric control valve 202 is fixed on the circumference of each fixed pipe 201 . The electric control valve 202 is arranged in the middle of the fixed pipe 201 . The fixed pipe 201 is controlled to be on and off by the electric control valve 202 .

[0029] Furthermore, an output pipe 303 is fixedly connected to the center of the bottom end of the growth kettle 3, and the bottom end of the output pipe 303 is connected to the input end of the equipment for processing the reactants in the next step. Fixed rods 301 are fixed in a circular array at the bottom end of the growth kettle 3 outside the output pipe 303. All the fixed rods 301 at the bottom end of each growth kettle 3 are fixed together on the top of the scale platform 302 at the bottom thereof. The growth kettle 3 outputs the grown particles together with the slurry through the output pipe 303, and the growth kettle 3 is supported on the scale platform 302 by the fixed rods 301.

[0030] The operation process of this embodiment is as follows: during operation, firstly, the slurry raw material and the seed crystal are input into the three-way pipe 304 through the feeding auger 4, then the electric control valve 202 on the two outer fixed pipes 201 of the growth kettle 3 connected with the three-way pipe 304 is opened, and the electric control valve 202 on the other fixed pipes 201 is closed, and the delivery pump 102 is started, and the input end of the delivery pump 102 generates a negative pressure, and the negative pressure will generate a negative pressure in the fixed pipe 201, so that the slurry in the growth kettle 3 is sucked into the transfer chamber 2, and then input into the delivery pump 102 through the bottom pipe 103, and then input into the delivery pipe 101 through the delivery pump 102, and output to the storage tank 1 through the delivery pipe 101. When the slurry is stored in the storage tank 1, , observe the readings on each scale 302, close the valve at the output end of the aging kettle connected to the feeding auger 4, close the electric control valve 202 on the two outer fixed pipes 201 of the growth kettle 3 connected to the three-way pipe 304, open the remaining electric control valves 202, start the delivery pump 102, suck the slurry in the storage tank 1, and deliver it to the transfer chamber 2 through the bottom pipe 103, deliver it to the remaining four fixed pipes 201 through the transfer chamber 2, and deliver it to the remaining four growth kettles 3 through the remaining four fixed pipes 201, observe the readings on the scale 302, and adjust the switches of each electric control valve 202 at the same time, until the readings on the scales 302 under each growth kettle 3 are consistent, and the batching work is completed. Specific embodiment 2

[0031] See also Figure 1 , 4On the basis of the specific embodiment 1, a material pipe 1 401 is fixed at one end of the upper part of the feeding auger 4 away from the storage tank 1, and a material pipe 2 402 is fixedly connected to the lower part of the feeding auger 4 at a position symmetrical to the material pipe 1 401. When working, the feeding pipe 1 401 is connected to the aging kettle for conveying crystal seeds, and the connecting pipe 2 is connected to the pipeline for conveying crystal seed growth solution, so that when working, the crystal seeds and the crystal seed growth solution are conveyed to the feeding auger 4, continuously mixed in the feeding auger 4 and conveyed to the single-way pipe, and then conveyed to the two growth kettles 3 through the three-way pipe 304.

[0032] The operation process of this embodiment is: when working, the feed pipe 1 401 is connected to the aging kettle for conveying seed crystals, and the connecting pipe 2 is connected to the pipeline for conveying seed crystal growth solution, so that when working, the seed crystals and the seed crystal growth solution are conveyed to the feed auger 4, continuously mixed in the feed auger 4 and conveyed to the single-way pipe, and then conveyed to the two growth kettles 3 through the three-way pipe 304.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for preparing a ternary material precursor by combining intermittent discharge and separate kettles, comprising a storage tank (1), a transfer chamber (2), a growth kettle (3) and a feeding auger (4), characterized in that: The bottom end of the storage tank (1) is fixedly connected to a delivery pipe (101), the bottom end of the delivery pipe (101) is fixedly connected to a delivery pump (102), the bottom end of the delivery pump (102) is fixedly connected to a bottom pipe (103), the bottom end of the bottom pipe (103) is fixedly connected to a transfer chamber (2), the outer periphery of the transfer chamber (2) is fixedly connected to six fixed pipes (201) in a circular array, the ends of the six fixed pipes (201) away from the transfer chamber (2) are all fixedly connected to a growing kettle (3), the lower periphery of two growing kettles (3) on one side of the storage tank (1) are commonly fixedly connected to a three-way pipe (304), the end of the three-way pipe (304) away from the growing kettle (3) is fixedly connected to a feeding auger (4), and a weighing platform (302) is provided below each growing kettle (3).

2. The device for preparing ternary material precursor by combining intermittent discharge and separate kettles according to claim 1, characterized in that: The top end of the material storage tank (1) is fixedly connected to a ventilation pipe (105), and a ventilation valve (106) is fixed on the circumference of the ventilation pipe (105).

3. The device for preparing ternary material precursor by combining intermittent discharge and separate kettle according to claim 1, characterized in that: Support rods (104) are fixed in a circular array at the bottom edge of the storage tank (1), and the support rods (104) are arranged between the fixed pipes (201).

4. The device for preparing ternary material precursor by combining intermittent discharge and separate kettle according to claim 1, characterized in that: An electric control valve (202) is fixed on the circumference of each fixed tube (201), and the electric control valve (202) is arranged in the middle of the fixed tube (201).

5. The device for preparing ternary material precursor by combining intermittent discharge and separate kettle according to claim 1, characterized in that: An output pipe (303) is fixedly connected to the center of the bottom end of the growth kettle (3), and fixing rods (301) are fixed in a circular array at the bottom end of the growth kettle (3) outside the output pipe (303), and all the fixing rods (301) at the bottom end of each growth kettle (3) are fixed together to the top of the scale platform (302) at the bottom thereof.

6. The device for preparing ternary material precursor by combining intermittent discharge and separate kettles according to claim 1, characterized in that: A material pipe 1 (401) is fixed to one end of the upper part of the material conveying auger (4) away from the material storage tank (1), and a material pipe 2 (402) is fixedly connected to the lower part of the material conveying auger (4) at a position symmetrical to the material pipe 1 (401).

Images