Chlorine discharging device for ionic liquid low-temperature electrolytic aluminum

Abstract

The invention discloses a chlorine discharging device for ionic liquid low-temperature electrolytic aluminum, and belongs to the technical field of green metallurgy, the chlorine discharging device is used for discharging chlorine separated out from an electrolytic bath, the chlorine discharging device comprises a shell, and the electrolytic bath is arranged in an inner cavity of the shell; the chlorine detector is arranged on the shell and is used for monitoring the chlorine concentration in the shell; and the exhaust pipeline is arranged on one side of the shell and is used for guiding chlorine in the shell to the outside. The negative influence of anode chlorine evolution on the aluminum electrodeposition process is effectively reduced, and then the stability of the aluminum electrolysis process and the product quality are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of green metallurgy, and in particular relates to a chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids. Background Art

[0002] As global climate change becomes increasingly severe, the electrolytic aluminum industry, as a key area of ​​carbon dioxide emissions, faces arduous tasks in energy conservation and emission reduction. The emergence of low-temperature molten salt systems with aluminum chloride as the aluminum source has provided new possibilities for carbon reduction in aluminum electrolysis processes. Among them, ionic liquids have attracted widespread attention from academia and industry because they can exist in liquid form at room temperature or close to room temperature and can directly electrodeposit pure aluminum on the cathode. Studies have shown that chloroaluminate ionic liquids can achieve aluminum electrolysis at 25 to 150°C, and their energy consumption is significantly reduced compared to traditional high-temperature molten salt systems. This low energy consumption characteristic gives this technology great potential in energy conservation and emission reduction, and provides a practical solution for the sustainable development of the electrolytic aluminum industry.

[0003] However, during the low-temperature electrolysis of aluminum in ionic liquids, chlorine is precipitated from the anode. If the exhaust is not smooth, the cell pressure will be unstable, affecting the aluminum deposition rate and causing a loss in production efficiency. Moreover, when chlorine is precipitated, it will gather on the anode surface in the form of bubbles. The coalescence and rupture of the bubbles will damage the anode. In addition, chlorine precipitation will also affect the apparent morphology of the deposited aluminum, thereby affecting the quality of aluminum products.

[0004] Therefore, based on the characteristics of chlorine gas precipitation at the anode during low-temperature aluminum electrolysis in chloroaluminate ionic liquid, it is urgent to design a chlorine removal device suitable for the ionic liquid system. Summary of the invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids, the chlorine removal device is used to discharge chlorine gas precipitated from an electrolytic cell, and the chlorine removal device comprises:

[0007] A shell, wherein the electrolytic cell is arranged in an inner cavity of the shell;

[0008] A chlorine gas detector, which is arranged on the housing and is used to monitor the chlorine gas concentration in the housing;

[0009] An exhaust pipeline is arranged at one side of the shell and is used to guide the chlorine gas in the shell to the outside.

[0010] Furthermore, the shell is a transparent acrylic shell.

[0011] Furthermore, the exhaust pipeline is provided with a blower for rapidly extracting the chlorine gas in the shell.

[0012] Furthermore, a filtering mechanism and a one-way valve for preventing the backflow of chlorine are also provided in the exhaust pipeline. The filtering mechanism is used to ensure that the exhausted chlorine is effectively treated before entering the environment to reduce the impact on the surrounding environment; the one-way valve is used to prevent the backflow of chlorine in the exhaust pipeline and the gas in the external environment.

[0013] Furthermore, the exhaust pipe is made of corrosion-resistant material.

[0014] Furthermore, a first window is provided above the housing, and the chlorine gas detector is installed on the first window; wherein the chlorine gas detector is sealed and connected to the first window;

[0015] A second window is formed on the side wall of the shell, and the exhaust pipe is installed on the second window; wherein the exhaust pipe is sealed and connected to the second window.

[0016] Furthermore, the chlorine gas detector includes a low-level alarm and a high-level alarm, which are used to realize real-time monitoring and intelligent alarm of the chlorine gas concentration in the shell.

[0017] Beneficial effects:

[0018] The present invention improves the exhaust efficiency of the electrolytic cell by providing an exhaust pipeline and a chlorine detector, ensures that the precipitated chlorine can be discharged in time, avoids gas accumulation in the cell, and effectively reduces the negative impact of anode chlorine evolution on the aluminum electrodeposition process, thereby ensuring the stability of the aluminum electrolysis process and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids according to the present invention;

[0020] Explanation of the accompanying drawings: 1. Chlorine gas detector; 2. Shell; 3. Exhaust pipe; 4. Blower. DETAILED DESCRIPTION

[0021] This section will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as limiting the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Example 1

[0026] refer to Figure 1 , a chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids, the chlorine removal device is used to discharge chlorine gas precipitated from the electrolytic cell, and the chlorine removal device comprises:

[0027] A shell 2, wherein the electrolytic cell is arranged in the inner cavity of the shell 2;

[0028] A chlorine gas detector 1 is arranged on the housing 2 and is used to monitor the chlorine gas concentration in the housing 2;

[0029] The exhaust pipe 3 is arranged at one side of the shell 2 and is used to guide the chlorine gas in the shell 2 to the outside.

[0030] Preferably, the housing 2 is a transparent acrylic housing.

[0031] Preferably, the exhaust pipe 3 is provided with a blower 4 for rapidly extracting the chlorine gas in the shell 2 .

[0032] In this embodiment, the blower 4 is a small blower. During the exhaust process, the operation of the blower 4 is based on the Bernoulli principle. By forming a negative pressure in the shell 2, the chlorine in the electrolytic cell is quickly extracted. The formation of negative pressure not only improves the exhaust efficiency, but also effectively prevents the backflow of external air, avoiding possible secondary pollution and safety hazards. When the chlorine concentration in the electrolytic cell environment exceeds the set safety threshold, the blower 4 will automatically start to force exhaust, thereby realizing real-time control of the chlorine concentration in the electrolytic cell environment.

[0033] Preferably, a filtering mechanism and a one-way valve for preventing the backflow of chlorine are also provided in the exhaust pipeline 3. The filtering mechanism is used to ensure that the exhausted chlorine is effectively treated before entering the environment to reduce the impact on the surrounding environment; the one-way valve is used to prevent the backflow of chlorine in the exhaust pipeline and the gas in the external environment.

[0034] Preferably, the exhaust pipe 3 is made of corrosion-resistant material.

[0035] In this embodiment, the exhaust pipe 3 has good sealing properties to prevent chlorine gas leakage; at the same time, the connection points are equipped with sealing devices to further enhance safety and avoid any accidental leakage of chlorine gas.

[0036] Preferably, a first window is provided above the housing 2, and the chlorine gas detector 1 is installed on the first window; wherein the chlorine gas detector 1 is sealed and connected to the first window;

[0037] A second window is provided on the side wall of the housing 2, and the exhaust pipe 3 is installed on the second window; wherein the exhaust pipe 3 is sealedly connected to the second window.

[0038] Preferably, the chlorine gas detector 1 includes a low-level alarm and a high-level alarm, which are used to realize real-time monitoring and intelligent alarm of the chlorine gas concentration in the shell.

[0039] In this embodiment, the chlorine gas detector 1 can monitor the chlorine gas concentration in the electrolytic cell environment in real time, and perform data analysis and processing through a built-in processing unit; the chlorine gas detector 1 can set multiple alarm thresholds.

[0040] In this embodiment, a control system is also included, and the control system is connected to the chlorine gas detector 1, the blower 4, and the filtering mechanism respectively.

[0041] Working principle: In the initial state of the device, a chlorine detector is connected to the top of the shell to ensure that it can accurately monitor the chlorine concentration in the electrolytic cell. One side of the shell is connected to the exhaust pipe to ensure smooth exhaust. The exhaust pipe is equipped with a small blower that can be quickly started when needed to exhaust excess chlorine. In order to ensure safety and prevent gas leakage, all interfaces are strictly sealed to ensure that the entire device remains closed during operation.

[0042] Before the official operation, carefully monitor whether the display value of the chlorine gas detector is within the normal range, and ensure that the detector is in good working condition; in addition, it is necessary to check the operation of the small blower to ensure that it can start smoothly and work normally to avoid any failure in subsequent operations.

[0043] After completing the above inspection, turn on the power switch, start the working program of the electrolytic cell, and conduct real-time monitoring and automatic control of the chlorine concentration in the electrolytic cell environment; when the chlorine concentration exceeds the alarm threshold, the low alarm or high alarm of the chlorine detector sounds an alarm, and at the same time, the control system receives a signal and starts a small blower to force the chlorine out of the electrolytic cell, thereby effectively controlling the chlorine concentration in the electrolytic environment within the range set by the program.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids, the chlorine removal device being used to discharge chlorine gas precipitated from an electrolytic cell, characterized in that: The chlorine removal device comprises: A shell, wherein the electrolytic cell is arranged in an inner cavity of the shell; A chlorine gas detector, which is arranged on the housing and is used to monitor the chlorine gas concentration in the housing; An exhaust pipeline is arranged at one side of the shell and is used to guide the chlorine gas in the shell to the outside.

2. The chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids according to claim 1, characterized in that: The shell is a transparent acrylic shell.

3. The chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids according to claim 1, characterized in that: The exhaust pipeline is provided with a blower for rapidly extracting the chlorine gas in the shell.

4. The chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids according to claim 3, characterized in that: A filtering mechanism and a one-way valve for preventing chlorine backflow are also provided in the exhaust pipeline. The filtering mechanism is used to ensure that the exhausted chlorine is effectively treated before entering the environment to reduce the impact on the surrounding environment; the one-way valve is used to prevent the backflow of chlorine in the exhaust pipeline and the gas in the external environment.

5. The chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids according to claim 1, characterized in that: The exhaust pipe is made of corrosion-resistant material.

6. The chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids according to claim 1, characterized in that: A first window is provided on the top of the shell, and the chlorine gas detector is installed on the first window; wherein the chlorine gas detector is sealed and connected to the first window; a second window is provided on the side wall of the shell, and the exhaust pipe is installed on the second window; wherein the exhaust pipe is sealed and connected to the second window.

7. The chlorine removal device for low-temperature electrolysis of aluminum using ionic liquids according to claim 1, characterized in that: The chlorine gas detector comprises a low-level alarm and a high-level alarm, which are used to realize real-time monitoring and intelligent alarm of the chlorine gas concentration in the shell.

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