Corrosive gas recovery treatment device for indium stripping tank

Abstract

The application discloses a kind of indium back extraction tank corrosion gas recovery processing device, including multiple gas recovery covers being arranged above indium back extraction stirring pool, each gas recovery cover is spaced apart with stirring motor on indium back extraction stirring pool, the top of each gas recovery cover is connected with negative pressure collection pipe, one end of negative pressure collection pipe is connected with waste gas treatment tower by negative pressure fan, the bottom of waste gas treatment tower is connected with lye neutralization pool.Use, in the process of stirring by stirring motor, can start negative pressure fan to produce negative pressure and the volatile gas such as hydrochloric acid produced in the process of hydrochloric acid back extraction enrichment indium is absorbed to waste gas treatment tower by negative pressure collection pipe, after washing by waste gas treatment tower, by lye neutralization pool is handled, effectively solve the volatile gas such as hydrochloric acid environmental pollution and influence staff's health problem, purify working environment.

Description

Technical Field

[0001] This utility model relates to the field of indium preparation process technology, and in particular to a device for recovering and treating corrosion gas from an indium back-extraction box. Background Technology

[0002] Indium is a key material for high-tech industries such as semiconductors, and it has a significant impact on the development of high-tech industries.

[0003] The existing process for preparing crude indium (In > 98.5%) mainly involves purifying and removing impurities from the indium-containing solution (referred to as indium sulfate solution) generated during the preparation of zinc oxide using a sulfuric acid system, followed by P2O4 extraction and separation, hydrochloric acid back-extraction enrichment, zinc powder replacement, and smelting to produce crude indium. However, the indium back-extraction stirring device in the existing hydrochloric acid back-extraction tank is open and lacks sealing facilities for volatile gases such as hydrochloric acid. During the process of hydrochloric acid back-extraction enrichment of indium, a large amount of volatile gases such as hydrochloric acid are released into the working environment, which not only affects the health of workers but also pollutes the environment. Utility Model Content

[0004] The purpose of this application is to provide a corrosion gas recovery and treatment device for an indium back-extraction box, in order to solve the problem that a large amount of volatile gases such as hydrochloric acid will be released into the working environment during the process of indium enrichment by hydrochloric acid back-extraction, which not only affects the health of workers, but also causes environmental pollution.

[0005] To address the aforementioned technical problems, this application provides an indium back-extraction box corrosion gas recovery and treatment device, comprising: Multiple gas recovery hoods are installed above the indium back-extraction stirring tank. Each gas recovery hood is spaced apart from the stirring motor on the indium back-extraction stirring tank. A negative pressure collection pipe is connected to the top of each gas recovery hood. One end of the negative pressure collection pipe is connected to a waste gas treatment tower through a negative pressure fan. An alkaline neutralization tank is connected to the bottom of the waste gas treatment tower.

[0006] In a preferred embodiment, an indium back-extraction box corrosion gas recovery and treatment device is provided, wherein each of the negative pressure collection pipes is equipped with a negative pressure fan, and the other end of each of the negative pressure collection pipes is connected to a negative pressure main pipe, which is connected to the waste gas treatment tower.

[0007] The solution requires detailed explanation of an indium back-extraction box corrosion gas recovery and treatment device, wherein each of the negative pressure collection pipes is equipped with a control valve.

[0008] In a preferred embodiment, an indium back-extraction tank corrosion gas recovery and treatment device is provided, wherein a support plate connected to the gas recovery hood is fixed at the edge of the indium back-extraction stirring tank.

[0009] In a preferred embodiment, an indium back-extraction box corrosion gas recovery and treatment device is provided with baffles on the outside of the gas recovery hood near both ends of the indium back-extraction stirring tank.

[0010] The solution requires detailed explanation of an indium back-extraction box corrosion gas recovery and treatment device, wherein the waste gas treatment tower is equipped with a water spray plate.

[0011] Compared with existing technologies, the indium back-extraction tank corrosion gas recovery and treatment device provided by this utility model includes multiple gas recovery hoods installed above the indium back-extraction stirring tank. Each gas recovery hood is spaced apart from the stirring motor on the indium back-extraction stirring tank. A negative pressure collection pipe is connected to the top of each gas recovery hood, and one end of the negative pressure collection pipe is connected to a waste gas treatment tower via a negative pressure fan. An alkaline neutralization tank is connected to the bottom of the waste gas treatment tower. In use, during the stirring process by the stirring motor, the negative pressure fan can be activated to generate negative pressure, which absorbs volatile gases such as hydrochloric acid generated during the hydrochloric acid back-extraction enrichment of indium through the negative pressure collection pipe into the waste gas treatment tower. After being washed by the waste gas treatment tower, the gases are neutralized by the alkaline neutralization tank, effectively solving the problems of environmental pollution and the impact on the health of workers caused by volatile gases such as hydrochloric acid, and purifying the working environment. Attached Figure Description

[0012] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0013] Figure 1 This is a schematic diagram of a corrosion gas recovery and treatment device for an indium back-extraction box provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of an indium back-extraction box corrosion gas recovery and treatment device from another perspective, provided in an embodiment of this application. In the diagram: 1. Indium back-extraction stirring tank; 2. Gas recovery hood; 3. Stirring motor; 4. Negative pressure collection pipe; 5. Negative pressure fan; 6. Waste gas treatment tower; 7. Alkali neutralization tank; 8. Negative pressure main pipe; 9. Control valve; 10. Support plate; 11. Baffle. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0015] The core of this application is to provide a corrosion gas recovery and treatment device for an indium back-extraction box, in order to solve the problem that a large amount of volatile gases such as hydrochloric acid will be released into the working environment during the process of indium enrichment by hydrochloric acid back-extraction, which not only affects the health of workers, but also causes environmental pollution.

[0016] Figure 1 This is a schematic diagram of a corrosion gas recovery and treatment device for an indium back-extraction box provided in an embodiment of this application. Figure 2 For another perspective of the corrosion gas recovery and treatment device for an indium back-extraction box provided in this application embodiment, please refer to the schematic diagram. Figures 1 to 2 As shown.

[0017] Example 1 A corrosion gas recovery and treatment device for an indium back-extraction tank includes multiple gas recovery hoods 2 installed above an indium back-extraction stirring tank 1. After installation, each gas recovery hood 2 is spaced apart from a stirring motor 3 on the indium back-extraction stirring tank 1. The stirring motor 3 is originally installed on the indium back-extraction stirring tank 1. A negative pressure collection pipe 4 is connected to the top of each gas recovery hood 2. One end of the negative pressure collection pipe 4 is connected to a waste gas treatment tower 6 through a negative pressure fan 5. An alkaline neutralization tank 7 is connected to the bottom of the waste gas treatment tower 6. The negative pressure fan 5 is supported and installed by a wall or panel (not shown in the figure). The negative pressure provided by the fan 5 draws volatile gases, such as hydrochloric acid, generated during the hydrochloric acid back-extraction and enrichment of indium. These gases are absorbed into the waste gas treatment tower 6 via gas recovery hoods 2 and negative pressure collection pipes 4. The waste gas treatment tower 6 is equipped with water spray plates (not shown in the figure). These water spray plates wash the incoming gas, and the washing liquid falls into the alkaline neutralization tank 7 for neutralization. This process enables the recovery and treatment of volatile corrosive gases.

[0018] Based on Example 1, an indium back-extraction box corrosive gas recovery and treatment device, in order to improve the absorption effect and efficiency of volatile corrosive gases, preferably has a negative pressure fan 5 installed on each negative pressure collection pipe 4, and the other end of each negative pressure collection pipe 4 is connected to a common negative pressure main pipe 8, which is connected to a waste gas treatment tower 6. Multiple negative pressure fans 5 independently absorb the volatile corrosive gases in their respective areas, which is highly efficient and convenient.

[0019] Based on Example 1, an indium back-extraction box corrosion gas recovery and treatment device is provided, in which each negative pressure collection pipe 4 is equipped with a control valve 9. The control valve 9 can be used to separately close and open the corresponding negative pressure collection pipe 4 to meet the absorption needs of gases in different areas.

[0020] Based on Example 1, in order to improve the stability of the gas recovery hood 2 and block the gas, a support plate 10 connected to the gas recovery hood 2 is preferably fixed at the edge of the indium back-extraction stirring tank 1.

[0021] Based on Example 1, in order to further block the gas, a baffle 11 is preferably provided on the outside of the gas recovery hood 2 near both ends of the indium back-extraction stirring tank 1 for corrosion gas recovery treatment device.

[0022] This utility model provides an indium back-extraction box corrosion gas recovery and treatment device, including multiple gas recovery hoods 2 installed above the indium back-extraction stirring tank 1. Each gas recovery hood 2 is spaced apart from the stirring motor 3 on the indium back-extraction stirring tank 1. A negative pressure collection pipe 4 is connected to the top of each gas recovery hood 2. One end of the negative pressure collection pipe 4 is connected to a waste gas treatment tower 6 through a negative pressure fan 5. An alkaline neutralization tank 7 is connected to the bottom of the waste gas treatment tower 6. In use, during the stirring process by the stirring motor 3, the negative pressure fan 5 can be activated to generate negative pressure, which absorbs volatile gases such as hydrochloric acid generated during the hydrochloric acid back-extraction enrichment of indium through the negative pressure collection pipe 4 into the waste gas treatment tower 6. After being washed by the waste gas treatment tower 6, the gases are neutralized by the alkaline neutralization tank 7, effectively solving the problems of environmental pollution and the impact on the health of workers caused by volatile gases such as hydrochloric acid, and purifying the working environment.

[0023] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and incorporate common knowledge or customary techniques in the art disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0024] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A device for recovering and treating corrosive gases from an indium back-extraction chamber, characterized in that, include: Multiple gas recovery hoods (2) are set above the indium back-extraction stirring tank (1). Each gas recovery hood (2) is spaced apart from the stirring motor (3) on the indium back-extraction stirring tank (1). A negative pressure collection pipe (4) is connected to the top of each gas recovery hood (2). One end of the negative pressure collection pipe (4) is connected to a waste gas treatment tower (6) through a negative pressure fan (5). An alkaline neutralization tank (7) is connected to the bottom of the waste gas treatment tower (6).

2. The indium back-extraction box corrosion gas recovery and treatment device according to claim 1, characterized in that, Each of the negative pressure collection pipes (4) is equipped with a negative pressure fan (5), and the other end of each of the negative pressure collection pipes (4) is connected to a negative pressure main pipe (8), which is connected to the waste gas treatment tower (6).

3. The indium back-extraction box corrosion gas recovery and treatment device according to claim 1, characterized in that, Each of the negative pressure collection pipes (4) is equipped with a control valve (9).

4. The indium back-extraction box corrosion gas recovery and treatment device according to claim 1, characterized in that, The edge of the indium back-extraction stirring tank (1) is also fixed with a support plate (10) connected to the gas recovery hood (2).

5. The indium back-extraction box corrosion gas recovery and treatment device according to claim 1, characterized in that, Baffles (11) are also provided on the outside of the gas recovery hood (2) near both ends of the indium back-extraction stirring tank (1).

6. The indium back-extraction box corrosion gas recovery and treatment device according to claim 1, characterized in that, The waste gas treatment tower (6) is equipped with a water spray plate.

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