A feeding device for a three-manganese-tetraoxide reaction bucket

Abstract

The utility model provides a kind of feeding device of four manganese dioxide reaction bucket, comprising: premix barrel, inner bucket, reaction bucket, the premix barrel is installed on reaction bucket upper portion by support frame, the premix barrel lower portion is conical, and premix barrel lower portion is equipped with liquid collecting tank, the liquid collecting tank is connected with the inside of reaction bucket by multiple first liquid inlet pipes;The inner bucket is installed in premix barrel, and inner bucket lower portion is connected with the inner wall of premix barrel by support column;The upper portion of reaction bucket is equipped with circulating pump, and the liquid inlet of circulating pump is connected with the inside of reaction bucket by pumping pipe, and the liquid outlet of circulating pump is connected with inner bucket by second liquid inlet pipe;The inner bucket is connected with alkali bucket by lye pipe.The utility model by the manganese salt solution in reaction bucket is pumped into inner bucket, and after premixing with lye, again by first liquid inlet pipe dispersed and sent into each place of reaction bucket, can improve the diffusion speed of lye in reaction bucket, shorten the lag time of pH monitor reading, to prevent lye excess from leading to pH value overproof.

Description

Technical Field

[0001] This utility model relates to the field of manganese tetroxide production technology, and in particular to a feeding device for a manganese tetroxide reaction tank. Background Technology

[0002] Manganese tetroxide (MTE) is an important industrial raw material, mainly used in the production of lithium manganese oxide for batteries or in the production of manganese-zinc ferrite soft magnetic materials. Therefore, industrial applications have strict requirements regarding the purity and particle size of MTE. Currently, the main industrial process for large-scale production of MTE is wet synthesis. Wet synthesis primarily uses soluble manganese salts such as manganese sulfate as raw materials. Ammonia or sodium hydroxide solution is added to the solution as a precipitant, and the mixture is stirred and air is introduced, resulting in the formation of MTE precipitate in a reaction vessel. After aging, filtration, and drying, the desired MTE product is obtained. In wet synthesis processes, an alkaline precipitant needs to be slowly added to the manganese salt solution to maintain the pH value between 8 and 10. For example, a battery-grade manganese tetroxide preparation system disclosed in Chinese Patent Application No. 202420620757.X directly adds alkali solution to the reaction tank and diffuses it under the agitation of a stirrer, and obtains the pH value through a pH monitor. However, in actual production, the diameter of the reaction tank is 2m to 3m, and the diffusion rate of the alkali solution after entering the tank is slow. Each reaction tank is only equipped with one pH monitor, which causes a certain lag in the pH monitor reading. During the waiting period for the reading to stabilize, it is easy to cause an excess of alkali solution. Therefore, a feeding device for the manganese tetroxide reaction tank is needed, which is equipped with a premixing tank to premix the alkali solution before it enters the reaction tank, thereby improving the diffusion rate of the alkali solution. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes a feeding device for a manganese tetroxide reaction tank, which is equipped with a premixing tank. Before the alkali solution enters the reaction tank, it is premixed to increase the diffusion rate of the alkali solution.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model proposes a feeding device for a manganese tetroxide reaction tank, comprising: a premixing tank, an inner tank, and a reaction tank. The premixing tank is mounted on the upper part of the reaction tank via a support frame. The lower part of the premixing tank is conical, and a liquid collection tank is provided at the lower part of the premixing tank. The liquid collection tank is connected to the interior of the reaction tank via multiple first liquid inlet pipes. The inner tank is installed inside the premixing tank, and the lower part of the inner tank is connected to the inner wall of the premixing tank via a support column. A circulation pump is provided on the upper part of the reaction tank. The inlet of the circulation pump is connected to the interior of the reaction tank via a liquid extraction pipe, and the outlet of the circulation pump is connected to the inner tank via a second liquid inlet pipe. The inner tank is connected to an alkali preparation tank via an alkali solution pipe.

[0006] Furthermore, one end of the second inlet pipe and one end of the alkali pipe pass through the premixing tank and are connected to the inner cavity at the bottom of the inner tank along the tangential direction.

[0007] Furthermore, the bottom of the inner barrel is conical, and the bottom of the inner barrel is provided with a through hole with a diameter of 12mm to 20mm.

[0008] Furthermore, the upper surface of the inner barrel is 10cm to 20cm lower than the upper surface of the premix barrel.

[0009] Furthermore, the upper part of the premixing tank is connected to the reaction tank via an overflow pipe. The height of the upper end of the overflow pipe is higher than the upper end of the inner tank but lower than the upper end of the premixing tank.

[0010] Furthermore, the first inlet pipe has 3 to 5 tubes.

[0011] The beneficial effects of this invention are as follows: by pumping the manganese salt solution in the reaction tank into the inner tank, pre-mixing it with the alkali solution, and then dispersing it into various parts of the reaction tank through the first inlet pipe, the diffusion rate of the alkali solution in the reaction tank can be increased, the lag time of the pH monitor reading can be shortened, thereby preventing the pH value from exceeding the standard due to excessive alkali solution. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the overflow pipe of this utility model;

[0014] Figure 3 This is a schematic diagram showing the connection between the second inlet pipe and the alkali pipe of this utility model;

[0015] Figure 4 This is a schematic diagram of the internal structure of the premixing tank of this utility model;

[0016] In the diagram: 1-Premixing tank, 2-Inner tank, 3-Reaction tank, 4-Support frame, 5-Collection tank, 6-First inlet pipe, 7-Circulation pump, 8-Second inlet pipe, 9-Alkali pipe, 10-Overflow pipe. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Throughout the description, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0019] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of the stated features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0020] like Figures 1 to 4 As shown, one embodiment of this utility model provides a feeding device for a manganese tetroxide reaction tank, including: a premixing tank 1, an inner tank 2, and a reaction tank 3. The premixing tank 1 is installed on the upper part of the reaction tank 3 via a support frame 4. The lower part of the premixing tank 1 is conical, and a liquid collection tank 5 is provided at the lower part of the premixing tank 1. The liquid collection tank 5 is connected to the interior of the reaction tank 3 via multiple first liquid inlet pipes 6. The inner tank 2 is installed in the premixing tank 1, and the lower part of the inner tank 2 is connected to the inner wall of the premixing tank 1 via a support column. A circulation pump 7 is provided on the upper part of the reaction tank 3. The liquid inlet of the circulation pump 7 is connected to the interior of the reaction tank 3 via a liquid extraction pipe, and the liquid outlet of the circulation pump 7 is connected to the inner tank 2 via a second liquid inlet pipe 8. The inner tank 2 is connected to an alkali preparation tank via an alkali solution pipe 9.

[0021] The reaction tank 3 contains manganese sulfate solution. During the production of manganese tetroxide, sodium hydroxide solution needs to be continuously added to the reaction tank 3, and continuous stirring and air introduction are required. When adding sodium hydroxide solution, the sodium hydroxide solution is sent from the alkali preparation tank to the inner tank 2 through the alkali pipe 9 by gravity flow or pumping. At the same time, the circulating pump 7 draws manganese sulfate solution from the reaction tank 3 and sends it to the inner tank 2. Since the solutions flowing out of the alkali pipe 9 and the second inlet pipe 8 enter the inner tank 2 tangentially, the solution in the inner tank 2 rotates in the inner tank 2, causing the sodium hydroxide solution to mix with the pumped manganese sulfate solution. Then, it overflows from the top of the inner tank 2 into the premixing tank 1. After being mixed again during the overflow, it flows into the collection tank 5 under the action of gravity and is sent to various parts of the reaction tank 3 through multiple first inlet pipes 6. The flow rate of manganese sulfate solution added to inner tank 2 is 5 to 10 times that of sodium hydroxide solution. Since the sodium hydroxide solution has been premixed in premixing tank 1, it can be quickly dispersed after entering reaction tank 3. Compared with the method of directly adding sodium hydroxide solution, this solution can shorten the lag time of pH monitor reading from 5 minutes to 2 minutes, so that the automatic control system of reaction tank 3 can more quickly determine whether to continue adding sodium hydroxide solution based on pH monitor reading, reducing the excessive addition of sodium hydroxide solution caused by pH monitor reading lag.

[0022] Meanwhile, after premixing, the sodium hydroxide solution can diffuse rapidly even at a low stirring speed, so the stirring speed can be appropriately reduced. Therefore, the newly added circulation pump 7 will not increase the overall power consumption of the reaction tank 3.

[0023] In a specific embodiment, such as Figure 3 , Figure 4 As shown, one end of the second inlet pipe 8 and one end of the alkali pipe 9 pass through the premixing tank 1 and are connected to the inner cavity of the lower part of the inner tank 2 along the tangential direction. Sodium hydroxide solution and manganese sulfate solution enter the inner tank 2 along the tangential direction, causing the solution to rotate in the inner tank 2 due to inertia, so that the two solutions are mixed evenly in the inner tank 2.

[0024] In a specific embodiment, such as Figure 4 As shown, the bottom of the inner tank 2 is conical, and the bottom of the inner tank 2 has a through hole with a diameter of 12mm to 20mm. The solution in the inner tank 2 mainly flows into the premixing tank 1 through overflow. The purpose of setting the through hole is to allow the residual solution in the inner tank 2 to flow into the premixing tank 1 through the through hole when the machine is stopped, so as to avoid the solution remaining in the inner tank 2 after the machine is stopped.

[0025] Specifically, the upper end of the inner tank 2 is 10cm to 20cm lower than the upper end of the premixing tank 1. After the sodium hydroxide solution and manganese sulfate solution are mixed in the inner tank 2, they overflow from the upper part of the inner tank 2 into the premixing tank 1, and are mixed again as they overflow and fall.

[0026] In a preferred embodiment, such as Figure 2 As shown, the upper part of the premixing tank 1 is connected to the reaction tank 3 via an overflow pipe 10. The height of the upper end of the overflow pipe 10 is higher than the upper end of the inner tank 2 but lower than the upper end of the premixing tank 1. The overflow pipe 10 can prevent the solution from draining too slowly after the first inlet pipe 6 becomes blocked, which would result in an excessively high solution level in the premixing tank 1. Excess solution can flow directly into the reaction tank 3 through the overflow pipe 10.

[0027] Preferably, there are 3 to 5 first inlet pipes 6. The premixed solution is sent to various parts of the reaction tank 3 through multiple first inlet pipes 6 to increase the diffusion rate of sodium hydroxide solution in the reaction tank 3.

[0028] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A feeding device for a manganese tetroxide reaction tank, characterized in that, include: The premixing tank (1), inner tank (2), and reaction tank (3) are provided. The premixing tank (1) is installed on the upper part of the reaction tank (3) by a support frame (4). The lower part of the premixing tank (1) is conical, and a liquid collection tank (5) is provided at the lower part of the premixing tank (1). The liquid collection tank (5) is connected to the interior of the reaction tank (3) through multiple first liquid inlet pipes (6). The inner tank (2) is installed in the premixing tank (1). The lower part of the inner tank (2) is connected to the inner wall of the premixing tank (1) through a support column. A circulation pump (7) is provided on the upper part of the reaction tank (3). The liquid inlet of the circulation pump (7) is connected to the interior of the reaction tank (3) through a liquid extraction pipe. The liquid outlet of the circulation pump (7) is connected to the inner tank (2) through a second liquid inlet pipe (8). The inner tank (2) is connected to the alkali preparation tank through an alkali pipe (9).

2. The feeding device for a manganese tetroxide reaction tank according to claim 1, characterized in that, After passing through the premixing tank (1), one end of the second liquid inlet pipe (8) and one end of the alkali pipe (9) are connected to the inner cavity of the lower part of the inner tank (2) in a tangential direction.

3. The feeding device for a manganese tetroxide reaction tank according to claim 1, characterized in that, The bottom of the inner barrel (2) is conical, and the bottom of the inner barrel (2) is provided with a through hole with a diameter of 12mm to 20mm.

4. The feeding device for a manganese tetroxide reaction tank according to claim 3, characterized in that, The upper end of the inner barrel (2) is 10cm to 20cm lower than the upper end of the premix barrel (1).

5. The feeding device for a manganese tetroxide reaction tank according to claim 4, characterized in that, The upper part of the premixing tank (1) is connected to the reaction tank (3) through an overflow pipe (10). The height of the upper end of the overflow pipe (10) is higher than the upper end of the inner tank (2) and lower than the upper end of the premixing tank (1).

6. The feeding device for a manganese tetroxide reaction tank according to claim 1, characterized in that, The first inlet pipe (6) has 3 to 5 tubes.

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