Built-in concentration device for precursor synthesis

Abstract

The utility model discloses a built-in concentration device for precursor synthesis, and relates to the technical field of concentration, the built-in concentration device comprises a reaction kettle, the top end of the reaction kettle is communicated with a plurality of groups of connecting pipes, the inner wall of the reaction kettle is fixedly connected with a plurality of groups of protective sleeves, the side walls of the protective sleeves are provided with openings, and the openings are communicated with the connecting pipes. And the inner walls of the connecting pipes are sleeved with filtering pipes extending into the protecting sleeves, the top ends of the connecting rods are in threaded connection with sealing covers, and annular pipes are communicated among the multiple sets of connecting pipes. According to the utility model, the sealing cover is opened by rotating, so that the filter pipe can be directly taken out when the filter pipe is blocked and backwashing and back flushing cannot be solved, and then a new filter pipe is inserted into the connecting pipe, so that the problem of blockage of the filter pipe can be solved, and production work does not need to be stopped in the reaction kettle in the process, so that the production efficiency is improved; and the protective sleeve is arranged outside the filter pipe in a sleeving manner, so that the filter pipe cannot be excessively collided, and the service life of the filter pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of concentration, in particular to a built-in concentration device for precursor synthesis. Background Art

[0002] The ternary cathode material used in lithium-ion batteries has the advantages of high capacity, long life, relatively low cost, and good safety. The main method for preparing its precursor is currently to use the coprecipitation method, adding a metal nickel-cobalt-manganese solution to a reactor, mixing it with ammonia and alkali to generate a hydroxide precipitate. During the precursor synthesis process, the solid content of the system has a great influence on the precursor morphology, tap density, and specific surface area, which in turn affects the performance of the cathode material.

[0003] The existing patent (announcement number: CN202222889793.X) discloses a reactor with a built-in concentration device, which belongs to the technical field of positive electrode material precursor preparation. It solves the problem that the concentration outside the reactor easily causes fluctuations in the entire system and inconveniences in production control. The reactor body is provided with a motor connected to a stirring shaft; a stirring shaft and blades thereof are arranged in the reactor body; at least one annular tube is arranged in the reactor body, and a plurality of microporous filters are penetrated through the top of the annular tube. One side of the annular tube is connected to the inner wall of the reactor body through a circulation pipe, and the annular tube is connected with one end of the circulation pipe through the circulation pipe. The other end of the circulation pipe passes through the side wall of the reactor body and is connected to the reactor body through a pipeline. A centrifugal pump and a mother liquor outlet are arranged on the pipeline. The microporous filter has a simple structure and is easy to modify. The microporous filter in the accessories is low in cost as a consumable. The equipment operates reliably after the modification, which provides extremely stable operating conditions for the production control of the original synthesis system.

[0004] However, the above technical solution still has certain defects. The microporous filter is installed as a built-in connection. When it is blocked and cleaning, backflushing or backwashing cannot effectively solve the problem, the production process will be suspended, and the reactor materials may even need to be emptied for maintenance, which seriously affects the production progress and even the product quality. Therefore, a built-in concentration device for precursor synthesis is proposed. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a built-in concentration device for precursor synthesis to solve the technical problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a built-in concentration device for precursor synthesis, comprising a reactor, the top end of the reactor is connected to multiple groups of connecting pipes, the inner wall of the reactor is fixedly connected to multiple groups of protective sleeves, the side wall of the protective sleeve is provided with an opening, the inner wall of the connecting pipe is provided with a filter tube extending to the inside of the protective sleeve, the top end of the connecting pipe is threadedly connected to a sealing cover, and an annular tube is connected between the multiple groups of connecting pipes.

[0007] As a preferred technical solution of a built-in concentration device for precursor synthesis of the utility model, a motor is fixedly connected to the top of the reactor, an output end of the motor is fixedly connected to a rotating shaft extending into the interior of the reactor, and one end of the rotating shaft located inside the reactor is fixedly connected to multiple groups of stirring rods.

[0008] As a preferred technical solution of a built-in concentration device for precursor synthesis of the utility model, a group of side walls of the connecting pipes are connected to a cleaning pipe, the end of the cleaning pipe is connected to the input end of a water pump, and the output end of the water pump is connected to a reflux pipe.

[0009] As a preferred technical solution of the built-in concentration device for precursor synthesis of the utility model, the side wall of the reflux pipe is connected to a discharge pipe, a group of valves are connected in series on the discharge pipe, and another group of valves are connected to the clean-out pipe and the reflux pipe respectively.

[0010] As a preferred technical solution of the built-in concentration device for precursor synthesis of the utility model, the side wall of another group of connecting pipes is connected to a cleaning pipe, the end of the cleaning pipe is connected to a diverter plate, the side wall of the diverter plate is connected to an air pipe, and the side wall of the diverter plate is connected to a water pipe located next to the air pipe.

[0011] As a preferred technical solution of a built-in concentration device for precursor synthesis of the utility model, the top end of the reactor is connected with a feed port, and the bottom end of the reactor is connected with a discharge port.

[0012] In summary, the utility model mainly has the following beneficial effects:

[0013] 1. The utility model can solve the problem of filter tube blockage by rotating the sealing cover to open it and removing the filter tube directly when the filter tube is blocked and backwashing and backflushing cannot solve the problem. Then, a new filter tube can be inserted into the connecting tube. In the above process, the production work inside the reactor does not need to be stopped, so that the production efficiency is improved. The protective sleeve is arranged on the outside of the filter tube, so that the filter tube will not be subjected to excessive collision, thereby increasing the service life of the filter tube.

[0014] 2. The utility model uses a water pump to draw the filtered liquid into the reflux pipe, and the discharge flow and the night flow can be conveniently controlled by controlling the valve openings on the reflux pipe and the discharge pipe, making the operation of the concentration device simpler, and the cleaning pipe is connected to the air pipe and the water pipe at the same time, so that a variety of cleaning methods can be selected when cleaning the filter tube, so that the filter tube can be fully cleaned and the service life of the filter tube is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model when viewed from above;

[0018] Figure 4 It is a schematic diagram of the explosion structure of the connecting pipe, the filter pipe and the protective sleeve of the utility model.

[0019] In the figure: 1. Reactor; 2. Connecting pipe; 3. Filter tube; 4. Sealing cover; 5. Protective sleeve; 6. Ring tube; 7. Feeding port; 8. Discharge port; 9. Motor; 10. Rotating shaft; 11. Stirring rod; 12. Cleaning pipe; 13. Water pump; 14. Reflux pipe; 15. Discharge pipe; 16. Cleaning pipe; 17. Air pipe; 18. Water pipe. DETAILED DESCRIPTION

[0020] 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. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0021] The following describes an embodiment of the utility model based on its overall structure.

[0022] A built-in enrichment device for precursor synthesis, such as Figure 1-4 As shown, it includes a reactor 1, the top of the reactor 1 is connected with multiple groups of connecting pipes 2, the inner wall of the reactor 1 is fixedly connected with multiple groups of protective sleeves 5, the side wall of the protective sleeve 5 is provided with an opening, the inner wall of the connecting pipe 2 is provided with a filter tube 3 extending to the inside of the protective sleeve 5, the top of the connecting pipe 2 is threadedly connected with a sealing cover 4, the multiple groups of connecting pipes 2 are connected with an annular tube 6, the top of the reactor 1 is connected with a feeding port 7, and the bottom of the reactor 1 is connected with a discharge port 8.

[0023] When the filter tube 3 is blocked and cannot be treated by backwashing, the sealing cover 4 is rotated to separate the sealing cover 4 from the connecting tube 2, and then the filter tube 3 is pulled out upwards, and then the filter tank is maintained or replaced, and the maintained or replaced filter tube 3 is inserted into the reactor 1 from the inside of the connecting tube 2, so that the filter tube 3 is reinserted into the protective sleeve 5, and then the sealing cover 4 is rotated to reconnect the sealing cover 4 to the connecting tube 2, thereby solving the problem of blockage of the filter tube 3, and the reaction work inside the reactor 1 does not need to be stopped during the above process.

[0024] Please refer to Figure 3 and Figure 4A motor 9 is fixedly connected to the top of the reactor 1, and a rotating shaft 10 extending into the reactor 1 is fixedly connected to the output end of the motor 9. One end of the rotating shaft 10 located inside the reactor 1 is fixedly connected to multiple groups of stirring rods 11.

[0025] The motor 9 drives the rotating shaft 10 to rotate, so that the rotating shaft 10 drives the stirring rod 11 to rotate, so that the precipitant and the metal salt solution in the reactor 1 are fully stirred and evenly dispersed, so that the particle size of the precursor generated by the reaction is more uniform.

[0026] Please refer to Figure 2 The side wall of one group of connecting pipes 2 is connected with a cleaning pipe 12, the end of the cleaning pipe 12 is connected to the input end of a water pump 13, the output end of the water pump 13 is connected with a return pipe 14, the side wall of the return pipe 14 is connected with a discharge pipe 15, a group of valves are connected in series on the discharge pipe 15, the cleaning pipe 12 and the return pipe 14 are respectively connected with another group of valves, the side wall of another group of connecting pipes 2 is connected with a cleaning pipe 16, the end of the cleaning pipe 16 is connected with a diverter plate, the side wall of the diverter plate is connected with an air pipe 17, and the side wall of the diverter plate is connected with a water pipe 18 located next to the air pipe 17.

[0027] When the filter tube 3 is initially blocked, the valves on the return pipe 14 and the cleaning pipe 12 are closed, and then gas or water is injected into the cleaning pipe 16 through the air pipe 17 or the water pipe 18. The gas or water enters a group of connecting pipes 2 through the cleaning pipe 16, and then enters each group of connecting pipes 2 through the annular pipe 6, and then enters multiple groups of filter tubes 3 through these connecting pipes 2, thereby backwashing the filter tube 3, so that the solid particles attached to the outside of the filter tube 3 are washed down.

[0028] When in use, the sealing cover 4 is rotated to open, so that when the filter tube 3 is blocked and backwashing and backflushing cannot solve the problem, the filter tube 3 can be directly taken out, and then a new filter tube 3 is inserted into the connecting tube 2 to solve the problem of filter tube 3 being blocked. In the above process, there is no need to stop production work inside the reactor 1, so that the production efficiency is improved, and the protective sleeve 5 is sleeved on the outside of the filter tube 3, so that the filter tube 3 will not be subjected to excessive collision, thereby increasing the service life of the filter tube 3. The parts not involved in the device are the same as the prior art or can be implemented by the prior art.

[0029] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A built-in concentration device for precursor synthesis, comprising a reaction kettle (1), characterized in that: The top end of the reactor (1) is connected to a plurality of connecting pipes (2), the inner wall of the reactor (1) is fixedly connected to a plurality of protective sleeves (5), the side wall of the protective sleeve (5) is provided with an opening, the inner wall of the connecting pipe (2) is provided with a filter pipe (3) extending into the interior of the protective sleeve (5), the top end of the connecting pipe is threadedly connected to a sealing cover (4), and an annular pipe (6) is connected between the plurality of connecting pipes (2).

2. The built-in concentration device for precursor synthesis according to claim 1, characterized in that: The top of the reactor (1) is fixedly connected to a motor (9), the output end of the motor (9) is fixedly connected to a rotating shaft (10) extending into the interior of the reactor (1), and one end of the rotating shaft (10) located inside the reactor (1) is fixedly connected to a plurality of stirring rods (11).

3. The built-in concentration device for precursor synthesis according to claim 1, characterized in that: The side walls of a group of the connecting pipes (2) are connected to a cleaning pipe (12), the end of the cleaning pipe (12) is connected to the input end of a water pump (13), and the output end of the water pump (13) is connected to a return pipe (14).

4. The built-in concentration device for precursor synthesis according to claim 3, characterized in that: The side wall of the reflux pipe (14) is connected to a discharge pipe (15), a group of valves are connected in series to the discharge pipe (15), and another group of valves are respectively connected to the clean-out pipe (12) and the reflux pipe (14).

5. The built-in concentration device for precursor synthesis according to claim 1, characterized in that: The side wall of another group of connecting pipes (2) is connected to a cleaning pipe (16), the end of the cleaning pipe (16) is connected to a diverter plate, the side wall of the diverter plate is connected to an air pipe (17), and the side wall of the diverter plate is connected to a water pipe (18) located next to the air pipe (17).

6. The built-in concentration device for precursor synthesis according to claim 1, characterized in that: The top end of the reaction kettle (1) is connected to a feeding port (7), and the bottom end of the reaction kettle (1) is connected to a discharging port (8).

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