Purifying device for electrolysis system and electrolysis system with same

Abstract

The utility model discloses a purification device for electrolyzing system and electrolyzing system with the same, the purification device for electrolyzing system comprises a recovery articulated chute, the recovery articulated chute is provided with an air inlet, an air outlet and a feed opening, the feed opening is located between the air inlet and the air outlet, the height of the recovery articulated chute is gradually reduced from the air inlet to the air outlet; the fan is used for guiding the flow direction of gas in the recovery elephant trunk; the filtering piece is arranged between the air inlet and the discharging opening; the flue is provided with a feeding port, and the feeding port is located below the discharging port; the blanking pipe is respectively communicated with the feeding hole and the blanking hole; the valve body is arranged on the discharging pipe and used for controlling the discharging amount of the discharging pipe. According to the purification device disclosed by the embodiment of the utility model, secondary purification of the electrolysis flue gas can be realized, on one hand, the purification degree of the electrolysis flue gas is high, the purification efficiency is improved, and on the other hand, the consumption of fluoride salt in the electrolysis bath is reduced, and the electrolysis production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electrolysis technology, and in particular to a purification device for an electrolysis system and an electrolysis system having the same. Background Technology

[0002] Electrolytic production generates electrolytic flue gas. For example, in the process of electrolytic aluminum production, the electrolytic flue gas mainly contains hydrogen fluoride, sulfur dioxide, and dust. The electrolysis system is equipped with a purification device to purify the electrolytic flue gas, but the utilization efficiency of adsorbents such as alumina in the purification device is low. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, the purification device can achieve secondary purification of electrolytic flue gas, resulting in a high degree of purification and increased purification efficiency, while simultaneously reducing the consumption of fluoride salts in the electrolytic cell and lowering the cost of electrolytic production.

[0004] To achieve the above objectives, a purification device for an electrolysis system is proposed according to a first aspect embodiment of the present invention, comprising: a recovery chute, the recovery chute having an air inlet, an air outlet, and a discharge port, the discharge port being located between the air inlet and the air outlet, and the height of the recovery chute gradually decreasing from the air inlet to the air outlet; a fan, the fan being used to guide the gas flow direction within the recovery chute; a filter element, the filter element being located between the air inlet and the discharge port; a flue, the flue having a feed inlet, the feed inlet being located below the discharge port; a discharge pipe, the discharge pipe being connected to both the feed inlet and the discharge port; and a valve body, the valve body being located on the discharge pipe, for controlling the discharge amount of the discharge pipe.

[0005] The purification device according to the first aspect of the present invention can achieve secondary purification of electrolytic flue gas. On the one hand, the purification degree of electrolytic flue gas is high, increasing the purification efficiency; on the other hand, it reduces the consumption of fluoride salts in the electrolytic cell, thereby reducing the electrolytic production cost.

[0006] According to some embodiments of the present invention, the purification device for the electrolysis system further includes: a first concentration sensor, which is disposed in the recovery chute and located between the air outlet and the filter element; and a controller, which controls the opening degree of the valve body according to the detection result of the concentration sensor.

[0007] According to some embodiments of the present invention, the purification device for the electrolysis system further includes: a second concentration sensor, which is disposed in the flue; and a controller, which controls the opening degree of the valve body according to the detection result of the concentration sensor.

[0008] According to some embodiments of this utility model, the recovery chute is provided with an observation port, which is located between the air outlet and the filter element, and is used to observe the accumulation state of particles inside the recovery chute.

[0009] According to some embodiments of the present invention, the purification device for the electrolysis system further includes: a transparent component, which is disposed on the recovery chute and blocks the observation port.

[0010] According to some embodiments of this utility model, the flue is located below the recovery chute.

[0011] According to some embodiments of the present invention, the air inlet is located on the lower side of the recovery chute; and / or the air outlet is located on the lower side of the recovery chute.

[0012] According to some embodiments of this utility model, the observation port is located horizontally on the side of the recovery chute.

[0013] According to some embodiments of this utility model, an inspection hole is provided on the upper side of the recovery chute, and the inspection hole is located between the air inlet and the material outlet.

[0014] An electrolysis system is provided according to a second aspect of the present invention, including a purification device for the electrolysis system according to a second aspect of the present invention.

[0015] According to a second aspect of the present invention, an electrolysis system is provided. By utilizing the purification device according to the first aspect of the present invention, secondary purification of electrolysis flue gas can be achieved. On the one hand, the purification degree of electrolysis flue gas is high, increasing the purification efficiency; on the other hand, the consumption of fluoride salts in the electrolytic cell is reduced, thereby lowering the electrolysis production cost.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is one of the structural schematic diagrams of the purification device according to an embodiment of the present utility model;

[0019] Figure 2 This is a second schematic diagram of the purification device according to an embodiment of the present utility model;

[0020] Figure label:

[0021] Purification device 1, recovery chute 100, air inlet 110, air outlet 120, discharge port 130, observation port 140, inspection hole 150, filter element 300, flue 400, feed inlet 410, valve body 500, first concentration sensor 610, second concentration sensor 620, discharge pipe 900. Detailed Implementation

[0022] The embodiments of this application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of this application are described in detail below.

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] In the description of this application, "multiple" means two or more.

[0025] The electrolysis system according to an embodiment of the present invention includes a purification device 1 for the electrolysis system according to the following embodiments of the present invention.

[0026] For example, the electrolysis system also includes an electrolytic cell and a desulfurization absorption tower. The electrolytic cell is upstream of the purification device 1, and the desulfurization absorption tower is downstream of the purification device 1. The electrolytic flue gas generated by the electrolytic cell first flows to the purification device 1, and then flows to the desulfurization absorption tower. The purification device 1 adsorbs and filters the dust and hydrogen fluoride in the electrolytic flue gas, and the desulfurization absorption tower desulfurizes the filtered electrolytic flue gas.

[0027] The purification device 1 for an electrolysis system according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown, the purification device 1 for an electrolysis system according to this utility model includes a recovery chute 100, a fan (not shown in the figure), a filter element 300, a flue 400, a feed pipe 900, and a valve body 500.

[0029] The recovery chute 100 is provided with an air inlet 110, an air outlet 120, and a discharge port 130. The discharge port 130 is located between the air inlet 110 and the air outlet 120. The height of the recovery chute 100 gradually decreases from the air inlet 110 to the air outlet 120. A fan is used to guide the gas flow within the recovery chute 100. A filter element 300 is located between the air inlet 110 and the discharge port 130. The flue 400 is provided with a feed inlet 410, which is located below the discharge port 130. The discharge pipe 900 is connected to both the feed inlet 410 and the discharge port 130. A valve body 500 is located on the discharge pipe 900 and is used to control the discharge rate of the discharge pipe 900.

[0030] According to the purification device 1 of this utility model embodiment, by operating the fan, the electrolytic flue gas generated in the electrolysis production can be guided into the recovery chute 100 through the air inlet 110. The recovery chute 100 can be provided with an adsorbent for adsorbing hydrogen fluoride in the electrolytic flue gas, such as alumina.

[0031] After passing through the adsorbent, the gas moves towards the outlet 120 under the guidance of the fan. When passing through the filter element 300, the particles in the gas and the adsorbent after adsorbing hydrogen fluoride will adhere to the filter element 300, realizing the separation of gas and solid and reducing the dust content in the flue gas. The filter element 300 can be a filter screen structure. The filtered gas is discharged from the outlet 120 into the recovery chute 100 and then continues to flow into the flue 400.

[0032] The fan can reverse direction, meaning that the fan guides the gas from the recovery chute 100 from the direction of the outlet 120 to the direction of the inlet 110, blowing the particles attached to the filter element 300 onto the wall of the recovery chute 100. Since the inlet 110 is higher than the outlet 120, the particles on the wall slide towards the outlet 120. When passing through the discharge port 130, they can move along the discharge pipe 900 towards the flue 400 and into the flue 400. Thus, the adsorbent can perform secondary adsorption on the filtered gas in the flue 400. On the one hand, this can improve the cleanliness of the gas discharged into the air, and on the other hand, it has a high recovery efficiency for hydrogen fluoride, which is beneficial for the production of fluoride salts, thereby reducing the consumption of fluoride salts in the electrolytic cell and lowering costs.

[0033] In addition, valve body 500 is located in feed pipe 900 to control the feed rate of feed pipe 900. Valve body 500 can be controlled manually or electrically. By controlling the feed rate of feed pipe 900, it is possible to ensure sufficient adsorbent material in recovery chute 100 and flue 400, thereby achieving thorough cleaning of electrolytic flue gas. On the other hand, it is possible to control the replenishment rate of adsorbent material, reduce costs, and avoid waste.

[0034] Thus, the purification device 1 according to the present invention can achieve secondary purification of electrolytic flue gas. On the one hand, the purification degree of electrolytic flue gas is high, increasing the purification efficiency; on the other hand, it reduces the consumption of fluoride salts in the electrolytic cell, thereby reducing the electrolytic production cost.

[0035] According to the electrolysis system of the present invention, by utilizing the purification device 1 of the above embodiment of the present invention, secondary purification of electrolysis flue gas can be achieved. On the one hand, the purification degree of electrolysis flue gas is high, increasing the purification efficiency; on the other hand, the consumption of fluoride salt in the electrolytic cell is reduced, thereby lowering the electrolysis production cost.

[0036] like Figure 1 As shown, the purification device 1 also includes a first concentration sensor 610 and a controller. The first concentration sensor 610 is located inside the recovery chute 100 and between the air outlet 120 and the filter element 300. The controller controls the opening degree of the valve body 500 based on the detection result of the first concentration sensor 610.

[0037] Specifically, the controller is connected to the first concentration sensor 610 and the valve body 500. Since the first concentration sensor 610 is located downstream of the filter element 300, the flue gas filtered by the filter element 300 comes into contact with the first concentration sensor 610. The first concentration sensor 610 can detect the content of gases such as hydrogen fluoride in the filtered flue gas, thereby determining whether the filtered flue gas has been effectively filtered. When the concentration of hydrogen fluoride in the filtered flue gas is high, the controller increases the opening of the valve body 500 to increase the amount of alumina falling into the flue 400, thereby... Increasing the contact area between the filtered flue gas and alumina allows for more thorough secondary filtration, effectively reducing the content of gases such as hydrogen fluoride in the flue gas. This further reduces the consumption of fluoride salts in electrolytic production and results in more environmentally friendly exhaust gas. When the concentration of alumina in the filtered flue gas is low, the opening of the control valve 500 is reduced to decrease the amount of alumina falling into the flue 400, ensuring sufficient alumina content in the recovery chute 100. This reduces the frequency of alumina replenishment and cleaning of the alumina in the flue 400.

[0038] Furthermore, since the controller controls the opening of the valve body 500 based on the detection results of the first concentration sensor 610, there is no need for manual control of the valve body 500 opening, resulting in a high degree of automation, which can reduce costs and improve work efficiency.

[0039] In addition, by placing the first concentration sensor 610 inside the recovery chute 100, the filtered flue gas can come into contact with the first concentration sensor 610 in a timely manner, thereby detecting the content of gases such as hydrogen fluoride in the filtered flue gas more accurately.

[0040] like Figure 2As shown, the purification device 1 also includes a second concentration sensor 620 and a controller. The second concentration sensor 620 is located inside the flue 400. The controller controls the opening of the valve body 500 based on the detection result of the second concentration sensor 620. The second concentration sensor 620 is located downstream of the feed inlet 410, thus allowing for a more accurate determination of the hydrogen fluoride concentration in the flue gas after secondary filtration.

[0041] Specifically, the controller is connected to the second concentration sensor 620 and the valve body 500 respectively. Since the second concentration sensor 620 is located downstream of the filter element 300, the flue gas filtered by the filter element 300 comes into contact with the second concentration sensor 620. The second concentration sensor 620 can detect the content of gases such as hydrogen fluoride in the filtered flue gas, thereby determining whether the filtered flue gas has been effectively filtered. When the concentration in the filtered flue gas is high, the opening of the control valve body 500 is increased to increase the amount of alumina falling into the flue 400, thereby increasing the contact area between the filtered flue gas and alumina again, making the secondary filtration of the flue gas more thorough, effectively reducing the content of gases such as hydrogen fluoride in the flue gas, further reducing the consumption of fluoride salts in electrolysis production, and making the discharged flue gas more environmentally friendly.

[0042] Furthermore, since the controller controls the opening of the valve body 500 based on the detection results of the second concentration sensor 620, there is no need for manual control of the valve body 500 opening, resulting in a high degree of automation, which can reduce costs and improve work efficiency.

[0043] In addition, the second concentration sensor 620 is installed inside the flue 400, and the flue gas inside the flue 400 is the gas to be discharged. Therefore, the opening of the valve body 500 can be controlled more accurately based on the content of gases such as hydrogen fluoride in the flue gas inside the flue 400.

[0044] like Figure 1 and Figure 2 As shown, the aforementioned recovery chute 100 is equipped with an observation port 140, located between the air outlet 120 and the filter element 300, for observing the accumulation state of particles within the recovery chute 100. For example, the observation port 140 can observe the distance between the particles within the recovery chute 100 and the observation port 140. If the distance between the particles within the recovery chute 100 and the observation port 140 is no greater than 1 / 3 to 1 / 2 of the distance between the observation port 140 and the discharge port 130, it indicates that the content of gases such as hydrogen fluoride in the flue gas is high, and the flue gas needs secondary filtration. Therefore, the opening degree of the control valve body 500 is increased to increase the amount of alumina falling into the flue 400, thereby increasing the contact area between the filtered flue gas and the alumina again, making the secondary filtration of the flue gas more thorough, effectively reducing the content of gases such as hydrogen fluoride in the flue gas, further reducing the consumption of fluoride salts in electrolytic production, and making the discharged flue gas more environmentally friendly.

[0045] The purification device 1 also includes a transparent element (not shown in the figure), which is disposed in the recovery chute 100 and blocks the observation port 140. The transparent element can be transparent glass or transparent plastic, and it can be bonded to the recovery chute 100 to ensure a tight seal, or it can be detachably connected to the recovery chute 100 for greater transparency and better observation. By providing the transparent element, the device ensures that the contents of the recovery chute 100 can be observed through the observation port 140 while simultaneously sealing the observation port 140 to prevent leakage of flue gas or particles from the recovery chute 100.

[0046] like Figure 1 and Figure 2 As shown, the flue 400 is located below the recovery chute 100. The central axis of the feed pipe 900 can extend vertically, or it can be inclined relative to the vertical direction. This makes it easier for particles in the recovery chute 100 to move from the feed pipe 900 to the flue 400. Furthermore, the movement speed of the particles in the feed pipe 900 can be adjusted by changing the inclination angle of the central axis of the feed pipe 900 relative to the vertical direction. Combined with the valve body 500, this results in a wider range of adjustable feed volume, making it suitable for different production scenarios and improving applicability.

[0047] like Figure 1 and Figure 2 As shown, the air inlet 110 is located on the lower side of the recovery chute 100. Thus, the dust-laden gas needs to be bent at the air inlet 110, and since the density of the dust-laden gas is greater than that of air, placing the air inlet 110 on the lower side of the recovery chute 100 slows down the flow rate of the dust-laden gas under the influence of gravity. This increases the contact time between the dust-laden gas and the adsorbent, enhancing the adsorption effect and more effectively removing impurities such as hydrogen fluoride from the dust-laden gas.

[0048] like Figure 1 and Figure 2 As shown, the air outlet 120 is located on the lower side of the recovery chute 100. Since the flue 400 is located below the recovery chute 100, placing the air outlet 120 on the lower side of the recovery chute 100 shortens the movement path of the filtered gas, which helps to shorten the pipe length between the recovery chute 100 and the flue 400, reduce costs, and save the space required for layout.

[0049] like Figure 1 and Figure 2As shown, the observation port 140 is horizontally located on the side of the recovery chute 100. This allows the operator to observe the inside of the recovery chute 100 from a level position without needing to look up or down, making the operator's working posture more comfortable.

[0050] like Figure 1 and Figure 2 As shown, the recovery chute 100 is provided with an inspection hole 150 on its upper side, located between the air inlet 110 and the discharge port 130. Since the particles formed from the absorption of hydrogen fluoride mainly accumulate between the air inlet 110 and the discharge port 130, the inspection hole 150, situated between these two locations, allows for maintenance of the area where particles accumulate, preventing particle leakage and ensuring smooth particle movement. Furthermore, the location of the inspection hole 150 on the upper side of the recovery chute 100 prevents it from being obstructed by particles, ensuring a clear view during maintenance, resulting in better maintenance performance, and preventing particle leakage from the inspection hole 150.

[0051] The purification device 1 for an electrolysis system according to the embodiments of the present invention, and other components and operations of the electrolysis system having the same, are known to those skilled in the art and will not be described in detail here.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0053] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A purification device for an electrolysis system, characterized in that, The application relates to a purification device for an electrolysis system, comprising: a recovery chute, the recovery chute being provided with an air inlet, an air outlet and a discharge port, the discharge port being located between the air inlet and the air outlet, the height of the recovery chute gradually decreasing from the air inlet to the air outlet; a fan, the fan being used for guiding the gas flow in the recovery chute; a filter, the filter being arranged between the air inlet and the discharge port; a flue, the flue being provided with a feeding port, the feeding port being located below the discharge port; a discharge pipe, the discharge pipe being in communication with the feeding port and the discharge port respectively; a valve body, the valve body being arranged in the discharge pipe and being used for controlling the discharging amount of the discharge pipe.

2. The purification device for an electrolysis system according to claim 1, characterized in that, The recovery chute is provided with an observation port, the observation port being located between the air outlet and the filter and being used for observing the stacking state of the particles in the recovery chute.

3. The purification device for an electrolysis system according to claim 2, characterized in that, Further comprising: a transparent member, the transparent member being arranged in the recovery chute and shielding the observation port.

4. The purification device for electrolysis systems of claim 2, wherein, The observation port is arranged on the side of the recovery chute in the horizontal direction.

5. The purification device for electrolysis systems of claim 1, wherein, The flue is located below the recovery chute.

6. The purification device for an electrolysis system of claim 5, wherein, The air inlet is arranged on the lower side of the recovery chute; and / or The air outlet is arranged on the lower side of the recovery chute.

7. The purification device for electrolysis systems of claim 1, wherein, Further comprising: a first concentration sensor, the first concentration sensor being arranged in the recovery chute and being located between the air outlet and the filter; a controller, the controller being used for controlling the opening degree of the valve body according to the detection result of the concentration sensor.

8. The purification device for electrolysis systems of claim 1, wherein, Further comprising: a second concentration sensor, the second concentration sensor being arranged in the flue; a controller, the controller being used for controlling the opening degree of the valve body according to the detection result of the concentration sensor.

9. The purification device for electrolysis systems of claim 1, wherein, The upper side of the recovery chute is provided with an access hole, the access hole being arranged between the air inlet and the discharge port.

10. An electrolysis system characterized in that, The application further relates to a purification device for an electrolysis system, comprising the purification device according to any one of claims 1-9.

Images