Coarse indium impurity gas filtration system and gas filtration control method

Abstract

This application discloses a crude indium impurity removal gas filtration system and a gas filtration control method, comprising a vertically arranged tube with an openable and closable dust discharge port at its bottom. The tube contains two sets of opposing filter components and cleaning components. Each filter component includes a rotatably connected filter screen, which automatically resets via a spring guide rail and a return spring. The return guide rail guides the filter screen from a vertical working position to a horizontally downward cleaning position. The cleaning component includes a fixed frame driven by a drive motor, on which multiple cleaning heads are arrayed. The fixed frame is parallel to the filter screen's rotation axis. When it rotates from horizontally upward to horizontally downward, it compresses the filter screen, causing it to rotate synchronously to a horizontal position. Simultaneously, the cleaning heads blow air through the filter screen. After cleaning, the fixed frame resets, and the filter screen returns to vertical under the action of the springs. This application achieves efficient and automated cleaning of the filter screen through mechanical linkage.

Description

Technical Field

[0001] This application relates to the field of gas filtration equipment technology, and more specifically, to a crude indium impurity removal gas filtration system and a gas filtration control method. Background Technology

[0002] In the process of recovering indium from pulverized catalysts, a large amount of dust-laden waste gas is generated. This dust not only contains incompletely pulverized catalyst particles but may also contain small amounts of indium-related impurities. Direct discharge or entry into subsequent treatment stages would not only pollute the environment but also waste indium resources and potentially affect the normal operation of subsequent indium recovery equipment. Therefore, filtering the dust in the waste gas generated from pulverized catalysts is an indispensable step in the indium recovery process. Currently, filtration systems are commonly used to treat this type of waste gas. These systems primarily rely on filter screens to intercept and separate dust. The filter screens trap solid dust particles in the waste gas, allowing the purified waste gas to enter subsequent processes. The trapped dust accumulates on the filter screens and is only processed after reaching a certain amount, ensuring the continuous and stable operation of the filtration system.

[0003] In the actual production process of indium recovery through catalyst crushing, existing filtration systems are unable to efficiently clean the filter screens. Because the dust particles generated during catalyst crushing are fine, and some particles may be adsorbed onto the filter screens due to factors such as exhaust gas humidity, current cleaning methods either involve manually disassembling the filter screens for cleaning, which is not only time-consuming and labor-intensive with extremely low cleaning efficiency, but also requires interrupting the entire indium recovery production process, severely impacting production continuity. Furthermore, it is difficult to completely remove adsorbed dust from the filter screen surface and pores, leading to easy clogging. Clogged filter screens significantly reduce the filtration efficiency of the system, preventing the exhaust gas purification effect from meeting standards. They also increase the operating load of the filtration system, exacerbate equipment wear and tear, increase production and maintenance costs, and may even cause the filtration system to malfunction due to severe clogging. Summary of the Invention

[0004] The purpose of this application is to provide a crude indium impurity removal gas filtration system and a gas filtration control method, which solves the technical problem of not being able to efficiently clean the filter screen and achieves the technical effect of efficiently cleaning the filter screen.

[0005] In a first aspect, embodiments of this application provide a crude indium impurity removal gas filtration system, including a tube body, two filter components, and two cleaning components. The tube body is vertically arranged, and its bottom end has a dust discharge port that can be sealed or opened for dust discharge. The two filter components are arranged opposite each other on a set of opposite inner sidewalls of the tube body, and the two cleaning components are arranged opposite each other on a set of opposite inner sidewalls of the tube body. Each filter component includes a filter screen, a spring guide rail, a return spring, and a return guide rail. The first side of the filter screen is rotatably connected to the first inner sidewall of the tube body. A spring guide post and a return guide post are provided on adjacent sides of the first side of the filter screen. The spring guide rail and the return guide rail are located on adjacent inner sidewalls of the first inner sidewall of the tube body. The return spring and the spring guide post are located within the spring guide rail. The return spring drives the spring guide post to move the filter screen to its reset position along the spring guide rail. The guide post is located on adjacent sides of the first side of the filter screen, and the return guide post is slidably connected within the return guide rail to guide the filter screen. The stroke of the return guide rail covers the filter screen rotating vertically from relative to the inner sidewall of the tube body to relative to the inner sidewall of the tube body. The travel range of the tube body is parallel to and downwardly positioned on the inner sidewall. The cleaning assembly includes a drive motor, a mounting bracket, and multiple cleaning heads. The first side of the mounting bracket is rotatably connected to the first inner sidewall of the tube body. The multiple cleaning heads are arranged in an array on the mounting bracket. The drive motor drives the mounting bracket to rotate along the first side of the mounting bracket. The travel range of the drive motor driving the mounting bracket covers the travel range from the mounting bracket being parallel to and upwardly positioned relative to the inner sidewall of the tube body to the mounting bracket being parallel to and downwardly positioned relative to the inner sidewall of the tube body. The rotation axis of the mounting bracket is parallel to the rotation axis of the filter screen. When the mounting bracket rotates from being parallel to and upwardly positioned relative to the inner sidewall of the tube body to being parallel to and downwardly positioned relative to the inner sidewall of the tube body, the mounting bracket presses the filter screen downwardly to drive the filter screen to rotate from being vertically positioned relative to the inner sidewall of the tube body to being parallel to and downwardly positioned relative to the inner sidewall of the tube body. The multiple cleaning heads are used to blow clean the filter screen when the mounting bracket presses the filter screen downwardly. After the filter screen is blown clean, the drive motor drives the mounting bracket to be parallel to and downwardly positioned relative to the inner sidewall of the tube body to be parallel to and upwardly positioned relative to the inner sidewall of the tube body.

[0006] In one possible implementation, a cleaning control component is also included. An electromagnet assembly is mounted on the mounting bracket, and the electromagnet assembly and the cleaning control component are electrically connected. The filter screen frame is made of iron. When the reset spring drives the filter screen to reset along the spring guide rail, the cleaning control component controls the electromagnet assembly to attract the filter screen to assist in the reset of the filter screen.

[0007] In another possible implementation, a sealing film is provided at the end of the filter screen away from the rotating shaft, which is used to seal between the filter screens of the two filter components.

[0008] In another possible implementation, the mounting bracket is also equipped with a vibration assembly, which is electrically connected to the cleaning control assembly; when multiple cleaning heads blow and clean the filter, the cleaning control assembly controls the vibration assembly to vibrate and assist in cleaning the filter.

[0009] In another possible implementation, the mounting frame is provided with multiple scrapers parallel to the pivot of the mounting frame; the pivot of the mounting frame is located above the pivot of the filter screen. When the mounting frame presses the filter screen downward to drive the filter screen to rotate from vertical relative to the inner wall of the tube to parallel relative to the inner wall of the tube downward, the mounting frame and the filter screen slide relative to each other, so that the multiple scrapers scrape off the dust from the filter screen.

[0010] In another possible implementation, the cleaning assembly further includes a telescopic frame and a telescopic drive assembly. The telescopic frame is equipped with multiple scrapers, and the telescopic drive assembly is used to drive the telescopic frame to extend from or retract from the fixed frame. Before the fixed frame presses down on the filter screen to rotate it from perpendicular to the inner wall of the tube to parallel to and downward relative to the inner wall of the tube, the telescopic drive assembly drives the telescopic frame to extend from the fixed frame. During the process of the fixed frame pressing down on the filter screen to rotate it from perpendicular to the inner wall of the tube to parallel to and downward relative to the inner wall of the tube, the fixed frame and the filter screen slide relative to each other, allowing the multiple scrapers to scrape away dust from the filter screen. After the fixed frame presses down on the filter screen to rotate it from perpendicular to the inner wall of the tube to parallel to and downward relative to the inner wall of the tube, the telescopic drive assembly drives the telescopic frame to retract from the fixed frame to avoid the multiple scrapers interfering with the multiple cleaning heads blowing and cleaning the filter screen.

[0011] In another possible implementation, the cleaning assembly also includes a distance detection assembly for detecting the distance between the mounting bracket and the filter screen. When the mounting bracket presses the filter screen downwards until the mounting bracket and the filter screen come into contact, if the distance between the mounting bracket and the filter screen detected by the distance detection assembly is greater than a preset distance, the vibration assembly is activated to vibrate the filter screen and clean the filter screen by blowing through multiple cleaning heads. After the vibration assembly vibrates the filter screen and the multiple cleaning heads clean the filter screen, the mounting bracket presses the filter screen downwards to drive the filter screen to rotate from being perpendicular to the inner wall of the tube to being parallel to the inner wall of the tube.

[0012] Secondly, embodiments of this application provide a gas filtration control method using the aforementioned crude indium impurity removal gas filtration system. The method includes: an initial position of the fixing frame parallel to and upward relative to the inner wall of the tube; a drive motor driving the fixing frame to rotate along a first side of the fixing frame; during the rotation of the fixing frame from being parallel to and upward relative to the inner wall of the tube to being parallel to the inner wall of the tube, the fixing frame presses the filter screen downward to drive the filter screen to rotate from being vertical relative to the inner wall of the tube to being parallel to and downward relative to the inner wall of the tube; and multiple cleaning heads blowing and cleaning the filter screen while the fixing frame presses the filter screen downward.

[0013] In one possible implementation, the method further includes: a cleaning control component controlling a vibration component to vibrate and assist in cleaning the filter screen; after multiple cleaning heads have finished cleaning the filter screen by blowing, when the reset spring drives the filter screen to reset along the spring guide rail, the cleaning control component controls an electromagnet component to attract the filter screen to assist in the reset of the filter screen.

[0014] In another possible implementation, the method further includes: before the fixed frame presses down on the filter screen to rotate it from perpendicular to the inner wall of the tube to parallel to the inner wall of the tube and downwardly positioned, the telescopic drive assembly drives the telescopic frame to extend from the fixed frame; during the process of the fixed frame pressing down on the filter screen to rotate it from perpendicular to the inner wall of the tube to parallel to the inner wall of the tube, the fixed frame and the filter screen slide relative to each other, allowing multiple scrapers to scrape dust off the filter screen; after the fixed frame presses down on the filter screen to rotate it from perpendicular to the inner wall of the tube to parallel to the inner wall of the tube and downwardly positioned, the telescopic drive assembly drives the telescopic frame to retract from the fixed frame to avoid the multiple scrapers interfering with the multiple cleaning heads blowing and cleaning the filter screen; the multiple cleaning heads blowing and cleaning the filter screen.

[0015] The beneficial effects of the embodiments in this application compared with the prior art are: This application provides a crude indium impurity removal gas filtration system. The rotating shaft of the fixed frame and the rotating shaft of the filter screen are parallel. When the fixed frame rotates from being parallel to the inner wall of the tube and upward to being parallel to the inner wall of the tube and downward, the fixed frame presses the filter screen downward, causing the filter screen to rotate from being vertical to being parallel to the inner wall of the tube and downward. Multiple cleaning heads are used to blow and clean the filter screen when the fixed frame presses the filter screen downward. In this application embodiment, the multiple cleaning heads of the cleaning component are arrayed on the fixed frame. The drive motor drives the fixed frame to rotate and press the filter screen, and the cleaning heads simultaneously blow and clean the impurities on the surface of the filter screen. Cleaning can be completed without disassembling the filter screen, effectively reducing manual maintenance costs. The rotating shaft of the filter screen and the rotating shaft of the fixed frame are parallel. After cleaning, the return spring drives the filter screen to quickly return to its original position. Cleaning and filtration operations can be quickly switched, reducing non-operation waiting time and improving the overall processing efficiency of crude indium impurity removal gas. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of a crude indium impurity removal gas filtration system in the first state provided in an embodiment of this application; Figure 2 This is a partial structural diagram of point A in the first state of a crude indium impurity removal gas filtration system provided in an embodiment of this application; Figure 3 A schematic diagram of the structure of a crude indium impurity removal gas filtration system in a second state, provided in an embodiment of this application; Figure 4 This is a partial structural diagram of point B in the second state of a crude indium impurity removal gas filtration system provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a crude indium impurity removal gas filtration system in a third state, as provided in an embodiment of this application. Figure 6 This is a partial structural diagram of point C of a crude indium impurity removal gas filtration system provided in the third state according to an embodiment of this application; Figure 7 A top view schematic diagram of a crude indium impurity removal gas filtration system provided in an embodiment of this application; Figure 8 This is a partial structural diagram at point D of a crude indium impurity removal gas filtration system provided in an embodiment of this application; Figure 9 This is a schematic diagram of the control structure of a crude indium impurity removal gas filtration system provided in an embodiment of this application; Figure 10 This is a schematic flowchart of a gas filtration control method provided in an embodiment of this application. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0019] It should be noted that when a component or structure is referred to as being "fixed to" or "set on" another component or structure, it can be directly on or indirectly on the other component or structure. When a component or structure is referred to as being "connected to" another component or structure, it can be directly connected to or indirectly connected to the other component or structure.

[0020] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device, component, or structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In the actual production process of indium recovery through catalyst crushing, the existing filtration system cannot efficiently clean the filter screen.

[0023] Based on the above reasons, this application provides a crude indium impurity removal gas filtration system, including a tube body, two filter components, and two cleaning components. The tube body is vertically arranged, and its bottom end has a dust discharge port that can be sealed or opened for dust discharge. The two filter components are arranged opposite each other on a set of opposite inner sidewalls of the tube body, and the two cleaning components are arranged opposite each other on a set of opposite inner sidewalls of the tube body. Each filter component includes a filter screen, a spring guide rail, a return spring, and a return guide rail. The first side of the filter screen is rotatably connected to the first inner sidewall of the tube body. A spring guide post and a return guide post are provided on the adjacent side of the first side of the filter screen. The spring guide rail and the return guide rail are located on the adjacent inner sidewalls of the first inner sidewall of the tube body. The return spring and the spring guide post are located within the spring guide rail. The return spring drives the spring guide post to move the filter screen back along the spring guide rail. The guide post is located on the adjacent side of the first side of the filter screen, and the return guide post is slidably connected within the return guide rail to guide the filter screen. The travel of the reset guide rail covers the range of the filter screen's rotation from perpendicular to the inner wall of the tube to parallel to and downward relative to the inner wall of the tube. The cleaning assembly includes a drive motor, a mounting bracket, and multiple cleaning heads. The first side of the mounting bracket is rotatably connected to the first inner wall of the tube. The multiple cleaning heads are arranged in an array on the mounting bracket. The drive motor drives the mounting bracket to rotate along the first side of the mounting bracket. The travel of the drive motor driving the mounting bracket covers the range of the mounting bracket's rotation from parallel to and upward relative to the inner wall of the tube to parallel to and downward relative to the inner wall of the tube. The rotation axis of the mounting bracket is parallel to the rotation axis of the filter screen. When the mounting bracket rotates from parallel to and upward relative to the inner wall of the tube to parallel to and downward relative to the inner wall of the tube, the mounting bracket presses the filter screen downward to drive the filter screen to rotate from perpendicular to the inner wall of the tube to parallel to and downward relative to the inner wall of the tube. The multiple cleaning heads are used to blow and clean the filter screen when the mounting bracket presses the filter screen downward. In this embodiment, the cleaning component has multiple cleaning head arrays mounted on a fixed frame. The drive motor rotates the fixed frame to squeeze the filter screen, and the cleaning heads simultaneously blow away impurities on the surface of the filter screen. Cleaning can be completed without disassembling the filter screen, effectively reducing manual maintenance costs. The filter screen shaft and the fixed frame shaft are arranged in parallel. After cleaning, the reset spring drives the filter screen to quickly reset. Cleaning and filtration operations can be quickly switched, reducing non-operation waiting time and improving the overall processing efficiency of crude indium impurity removal gas.

[0024] In some scenarios, the crude indium impurity removal gas filtration system of this application embodiment can be applied to equipment for crushing and recovering indium from catalysts, which can efficiently filter exhaust gas and efficiently clean the filter screen.

[0025] The following describes in detail, with specific examples, a crude indium impurity removal gas filtration system provided in the embodiments of this application.

[0026] Figure 1This is a schematic diagram of the structure of a crude indium impurity removal gas filtration system in its first state, as provided in an embodiment of this application. Figure 2 This is a partial structural diagram of point A in the first state of a crude indium impurity removal gas filtration system provided in an embodiment of this application, as shown below. Figure 1 and Figure 2 As shown in the embodiment of this application, a crude indium impurity removal gas filtration system is provided, including a tube body 1, two filter components 2 and two cleaning components 3. The tube body 1 is arranged vertically, and the bottom end of the tube body 1 is provided with a dust discharge port that can be sealed or opened to discharge dust. The two filter components 2 are arranged opposite to each other on a set of opposite inner sidewalls of the tube body 1, and the two cleaning components 3 are arranged opposite to each other on a set of opposite inner sidewalls of the tube body 1.

[0027] In this implementation, a tubular main structure that carries all functional components can be set up, and two sets of symmetrically distributed filter structures and two sets of symmetrically distributed cleaning structures can be configured. The two types of structures are respectively installed on the same set of opposite inner sidewalls of the tubular main body, ensuring a reasonable spatial layout and that they do not interfere with each other's operations.

[0028] It should be noted that the pipe body 1 adopts a vertical structure, and the lower end of the pipe body 1 is provided with an openable dust discharge port. The dust discharge port can be sealed or opened to discharge dust, which facilitates the collection and recycling of dust that falls off during the cleaning process.

[0029] For example, the tube body 1 can be made of stainless steel, and the dust discharge port can be equipped with a sealing cover to keep it sealed when not discharging dust, so as to avoid gas leakage from affecting the filtration effect.

[0030] In some implementations, the filter assembly 2 includes a filter screen 21, a spring guide rail 22, a reset spring 23, and a reset guide rail 24. The first side of the filter screen 21 is rotatably connected to the first inner wall of the tube body 1. A spring guide post 211 and a reset guide post 212 are provided on adjacent sides of the first side of the filter screen 21. The spring guide rail 22 and the reset guide rail 24 are located on adjacent inner walls of the first inner wall of the tube body 1. The reset spring 23 and the spring guide post 211 are located within the spring guide rail 22. The reset spring 23 drives the spring guide post 211 to reset the filter screen 21 along the spring guide rail 22. A guide post 25 is located on an adjacent side of the first side of the filter screen 21. The reset guide post 212 is slidably connected within the reset guide rail 24 to guide the filter screen 21. The stroke of the reset guide rail 24 covers the range from the filter screen 21 rotating vertically relative to the inner wall of the tube body 1 to rotating parallel to the inner wall of the tube body 1 and downwards.

[0031] In this implementation, the rotating connection structure between the first side of the filter screen 21 and the first inner wall of the tube body 1 can be achieved by setting a coaxial rotating shaft and bushing at the connection position.

[0032] For example, multiple bearing seats can be fixedly installed on the first inner side wall of the tube body 1, and a rotating shaft is fixedly inserted through the first side of the filter screen 21. The two ends of the rotating shaft are embedded in the bearing seats to achieve rotational engagement.

[0033] In this implementation, both the spring guide post 211 and the reset guide post 212 extend outward along the side of the filter screen 21, and the protruding column structure can be embedded in the corresponding guide rail to achieve sliding fit.

[0034] For example, the spring guide post 211 and the reset guide post 212 can be made of cylindrical metal material, with anti-slip limiting protrusions at the ends to prevent the guide post from coming out of the guide rail.

[0035] In this implementation, the spring guide rail 22 adopts an arc-shaped groove structure, and the reset spring 23 is placed along the arc-shaped path of the spring guide rail 22, with one end fixed to the end of the spring guide rail 22 and the other end abutting against the spring guide post 211.

[0036] For example, the arc-shaped groove cross section of the spring guide rail 22 can be set to a circle that matches the diameter of the spring guide post 211, and the groove wall is smoothed to reduce the frictional resistance of the guide post sliding.

[0037] In this implementation, the reset guide rail 24 adopts an arc-shaped groove structure with the same curvature as the spring guide rail 22, and the reset guide post 212 is embedded in the groove of the reset guide rail 24 and can only slide along the groove path.

[0038] The guide post 25 is fixed to the side of the filter screen 21 and works together with the reset guide post 212 to perform the guiding function.

[0039] For example, buffer pads can be provided at both ends of the groove of the reset guide rail 24 to reduce the impact loss when the reset guide post 212 moves to the end of its stroke and extend the service life of the component.

[0040] In this implementation, the stroke length of the reset guide rail can be set to match the maximum rotation angle range of the filter execution component, ensuring that the filter execution component can freely switch between a filtering state perpendicular to the inner wall and a storage state parallel to the inner wall and set downwards.

[0041] It should be noted that the two ends of the arc-shaped path of the reset guide rail 24 correspond to the two extreme working positions of the filter screen 21. When the guide column slides to the two ends, the filter screen 21 is in a state that is perpendicular to and parallel to the inner wall of the tube body 1, respectively. The position of the filter screen 21 inclined downward relative to the inner wall of the tube body 1 and the position that is parallel to the inner wall of the tube body 1 facilitates the removal of dust from the top of the filter screen 21.

[0042] For example, the arc of the reset guide rail 24 can be set to 90 degrees, corresponding to a rotation angle range of 0 to 90 degrees for the filter screen 21, fully covering the switching requirements of the two working states.

[0043] In some implementations, the cleaning assembly 3 includes a drive motor 31, a mounting bracket 32, and multiple cleaning heads 33. The first side of the mounting bracket 32 ​​is rotatably connected to the first inner wall of the tube body 1. The multiple cleaning heads 33 are arrayed on the mounting bracket 32. The drive motor 31 drives the mounting bracket 32 ​​to rotate along its first side. The stroke of the drive motor 31 covers the range from the mounting bracket 32 ​​being parallel upwards relative to the inner wall of the tube body 1 to being parallel downwards relative to the inner wall of the tube body 1. The rotation axis of the mounting bracket 32 ​​is parallel to the rotation axis of the filter screen 21. When the mounting bracket 32 ​​rotates from being parallel to the inner wall of the tube body 1 and upwards to being parallel to the inner wall of the tube body 1 and downwards, the mounting bracket 32 ​​presses downwards on the filter screen 21, causing the filter screen 21 to rotate from being perpendicular to the inner wall of the tube body 1 to being parallel to the inner wall of the tube body 1. The multiple cleaning heads 33 are used to blow and clean the filter screen 21 when the mounting bracket 32 ​​presses downwards on the filter screen 21. After the filter screen 21 is cleaned by blowing, the drive motor 31 drives the fixing frame 32 to be parallel to the inner wall of the tube body 1 and set downwards, and then the fixing frame 32 is parallel to the inner wall of the tube body 1 and set upwards.

[0044] In this implementation, the rotational connection structure between the first side of the fixing frame 32 and the first inner wall of the tube body 1 is also achieved through the cooperation of the rotating shaft and the bearing seat, with the rotating shaft and the rotating shaft of the filter screen 21 in a parallel position.

[0045] For example, the shaft end of the fixed frame 32 is connected to the output end of the drive motor 31, and the drive motor 31 outputs power to directly drive the fixed frame 32 to rotate.

[0046] In this implementation, the drive motor 31 is equipped with a reducer and a stroke control mechanism. The reducer can reduce the output speed and increase the torque, and the stroke control mechanism can limit the rotation range of the fixed frame 32.

[0047] For example, the stroke control mechanism can be implemented using a combination of limit switches. When the fixed frame 32 rotates to the limit position, the limit switch is triggered, and the drive motor 31 automatically stops outputting.

[0048] It should be noted that the mounting bracket 32 ​​adopts a rectangular frame structure, and multiple cross-distributed support rods are set inside the frame for installing and fixing the cleaning head 33.

[0049] For example, multiple cleaning heads 33 are evenly arranged in rows and columns on the support rod of the fixing frame 32, and the spacing between adjacent cleaning heads 33 is set to match the cleaning coverage area to ensure that there are no blind spots in the blowing.

[0050] Figure 3 This is a schematic diagram of the structure of a crude indium impurity removal gas filtration system in the second state, as provided in an embodiment of this application. Figure 4 This is a partial structural diagram of point B in the second state of a crude indium impurity removal gas filtration system provided in an embodiment of this application. Figure 5 This is a schematic diagram of the structure of a crude indium impurity removal gas filtration system in a third state, as provided in an embodiment of this application. Figure 6 This is a partial structural diagram at point C of a crude indium impurity removal gas filtration system provided in the embodiments of this application, in the third state, as shown below. Figures 1 to 6 As shown, Figure 3 The cleaning status of the filter screen 21 corresponding to the cleaning component 3. Figure 5 The state of filter 21 after cleaning by cleaning component 3. Figure 1 The corresponding state is when the mounting bracket 32 ​​of the cleaning component 3 begins to contact the filter screen 21.

[0051] Figure 7 This is a top view schematic diagram of a crude indium impurity removal gas filtration system provided in an embodiment of this application. Figure 8 This is a partial structural diagram at point D of a crude indium impurity removal gas filtration system provided in an embodiment of this application, as shown below. Figure 7 and Figure 8 As shown, in this implementation, the drive motor 31 can drive the rotating shafts of the fixing frame and the filter screen to be in a parallel state, ensuring that the fixing frame can be in close contact with the surface of the filter screen during rotation, and drive the filter screen to rotate synchronously through the squeezing action, without the need to set up an additional drive structure for the filter screen.

[0052] In this implementation, the rotation stroke of the drive motor driving the fixing frame can be set to match the maximum rotation angle range of the fixing frame, ensuring that the fixing frame can freely switch between a storage state parallel to the inner wall and a cleaning state parallel to the filter screen.

[0053] It should be noted that the two trigger points of the stroke control mechanism of the drive motor 31 correspond to the two extreme working positions of the fixed frame 32. When the fixed frame 32 rotates to the two trigger points, it is in the state of being parallel to the inner wall of the tube 1 and facing upwards, and parallel to the inner wall of the tube 1 and facing downwards, respectively.

[0054] For example, the control logic of the drive motor 31 can be set to drive the fixed frame 32 to rotate from the inner wall of the parallel tube 1 upward to the inner wall of the tube 1 downward during a single cleaning operation, stay for a preset time, and then rotate in the opposite direction back to the inner wall of the parallel tube 1 upward.

[0055] It should be noted that the end face of the fixing frame 32 facing the filter screen 21 is flat. During the rotation, after the end face contacts the surface of the filter screen 21, the filter screen 21 is gradually pressed down as the rotation angle increases, causing the filter screen 21 to rotate synchronously.

[0056] For example, a flexible buffer layer may be provided on the end face of the fixing frame 32 to avoid scratching the surface of the filter screen 21 when it is squeezed, thereby extending the service life of the filter screen 21.

[0057] In this implementation, after the filter screen 21 is cleaned by blowing, the drive motor 31 drives the fixing frame 32 to be parallel to the inner wall of the tube body 1 and set downwards, and then the fixing frame 32 is parallel to the inner wall of the tube body 1 and set upwards, so as to avoid the cleaning component 3 affecting the filtration flow of the filter screen 21.

[0058] In this implementation, the cleaning head can be activated while the fixed frame is squeezing the filter screen to blow away the dust and impurities attached to the surface of the filter screen. After the impurities are removed from the filter screen, they fall to the dust discharge port at the bottom of the tube, thus achieving simultaneous cleaning of the filter screen and recovery of impurities.

[0059] It should be noted that all cleaning heads 33 are connected to an external high-pressure air source. During the purging operation, high-pressure gas is ejected from the cleaning head 33, impacting the impurities attached to the surface of the filter screen 21 and causing them to fall off.

[0060] For example, the duration of the purging operation can be adjusted according to the filter clogging situation. All the impurities generated by the purging fall into the dust discharge port at the bottom of the tube 1. After cleaning is completed, the dust discharge port can be opened to complete the impurity recovery, effectively improving the dust removal and recovery efficiency.

[0061] In this implementation, multiple cleaning heads of the cleaning component are arrayed on a fixed frame. A drive motor rotates the fixed frame to compress the filter screen, while the cleaning heads simultaneously blow away impurities from the filter screen surface. Cleaning can be completed without disassembling the filter screen, effectively reducing manual maintenance costs. The filter screen of the crude indium impurity removal gas filtration system is rotatably connected to the inner wall of the tube. Spring guide posts and reset guide posts slide along spring guide rails and reset guide rails respectively, working in conjunction with the reset spring to reset the filter screen. This ensures stable filter screen movement and prevents displacement that could lead to a decrease in filtration accuracy.

[0062] With this implementation, the filter screen shaft and the fixed frame shaft are set in parallel. After cleaning, the reset spring drives the filter screen to quickly reset. Cleaning and filtration operations can be switched quickly, reducing non-operation waiting time and improving the overall processing efficiency of crude indium impurity removal gas.

[0063] Figure 9 This is a schematic diagram of the control structure of a crude indium impurity removal gas filtration system provided in an embodiment of this application, as shown below. Figure 2 and Figure 9As shown, in some implementations, a cleaning control component 4 is also included, and an electromagnet component 321 is provided on the mounting bracket 32. The electromagnet component 321 and the cleaning control component 4 are electrically connected.

[0064] In this implementation, a cleaning control component 4 can be installed on the crude indium impurity removal gas filtration system, and an electromagnet component 321 can be installed at a designated position on the mounting bracket 32. The control terminals of the electromagnet component 321 and the signal output port of the cleaning control component 4 are electrically connected to achieve precise control of the working state of the electromagnet component 321 by the cleaning control component 4.

[0065] It should be noted that the electromagnet assembly 321 can adopt a structure combining a closed iron core and an insulated enameled coil. The coil is evenly wound around the outside of the iron core, and the two conductive ends of the coil are led out to form wiring ports. After the coil is connected to the rated voltage, the iron core can generate a stable magnetic force of corresponding strength.

[0066] For example, the electromagnet assembly 321 can be embedded in the side surface of the bracket 32 ​​facing the filter screen 21, with the installation position corresponding to the position of the outer peripheral frame of the filter screen 21, to ensure that the magnetic force generated by the electromagnet assembly 321 when it is working can be fully applied to the frame area of ​​the filter screen 21.

[0067] In some implementations, the frame of the filter screen 21 is made of iron. When the reset spring 23 drives the filter screen 21 to reset along the spring guide rail 22, the cleaning control component 4 controls the electromagnet component 321 to attract the filter screen 21 to assist the filter screen 21 in resetting.

[0068] In this implementation, the outer peripheral support frame of the filter screen 21 can be made of ferrous metal material. The frame provides fixed support for the internal filter material structure, and the ferrous structure can generate an adsorption force with the magnetic field, providing a structural basis for the realization of electromagnetic assisted reset.

[0069] It should be noted that the iron frame of filter screen 21 can be made of galvanized iron profiles welded together, and the surface of the frame can be sprayed with a corrosion-resistant and rust-proof coating to avoid rusting caused by long-term contact with corrosive gases generated during the crude indium impurity removal process, thus ensuring the stability of the structure for long-term use.

[0070] For example, the cross-sectional dimensions of the filter screen 21 frame can be adapted to the working surface dimensions of the electromagnet assembly 321 to ensure that the electromagnetic attraction force can be evenly applied to multiple points on the frame, avoiding uneven local force that could cause the filter screen 21 to shift during movement.

[0071] In this implementation, the cleaning control component and the electromagnet component mounted on the mounting bracket are electrically connected. The filter screen frame is made of iron. When the reset spring drives the filter screen to reset, the cleaning control component controls the electromagnet component to attract the filter screen to assist in the reset, thereby improving the reset accuracy and speed of the filter screen and avoiding the problem of incomplete reset after the elasticity of the reset spring decays. This reduces the operation and maintenance cost of the crude indium impurity removal gas filtration system.

[0072] With this implementation, the electromagnet assembly can increase the tightness of the fit between the filter and the cleaning head when adsorbing the filter. When the cleaning head blows and cleans the filter, the filter will not shake or shift due to the impact of airflow, thereby improving the cleaning efficiency of the cleaning head and reducing the amount of residual impurities on the surface of the filter.

[0073] like Figure 7 As shown, in some implementations, a sealing film 213 is provided at the end of the filter screen 21 away from the rotating shaft, and the sealing film 213 is used to seal between the filter screens 21 of the two filter components 2.

[0074] In this implementation, a sealing film 213 can be provided at the end of the filter screen 21 away from its own axis of rotation. The length of the sealing film 213 matches the edge length of that end of the filter screen 21. It can be fixed to the frame of the filter screen 21 by means of adhesive or bolt fastening and rotates synchronously with the filter screen 21.

[0075] For example, the sealing film 213 can be made of fluororubber material, with the thickness set to match the size of the filter screen 21 frame, and the surface is treated with anti-sticking to avoid the problem of surface scaling after long-term dust adsorption, and to adapt to the corrosive working conditions of crude indium impurity removal gas.

[0076] In this implementation, the gap between the filter screens 21 of the two filter components 2 when they are joined can be filled by sealing film 213. When both filter screens 21 are in the working state perpendicular to the inner wall of the tube body 1, the joint ends of the two filter screens 21 are tightly fitted, and sealing film 213 fills the joint gap between the two to prevent unfiltered gas from leaking from the gap.

[0077] For example, when the two filters 21 are in working condition, the mating ends of the two filters 21 are respectively attached to the two sides of the sealing film 213. The reset thrust of the reset spring 23 can increase the tightness of the fit between the sealing film 213 and the two filters 21, further improve the sealing performance, and ensure the filtration accuracy of the crude indium impurity removal gas.

[0078] In this implementation, the sealing film 213 is made of a flexible material. When the fixing frame 32 drives the filter screen 21 to a cleaning position parallel to the inner wall of the tube body 1, the sealing film 213 can rotate synchronously with the filter screen 21 and will not rub against or interfere with the inner wall of the tube body 1 or the cleaning component 3, thus ensuring the smooth progress of the cleaning operation.

[0079] In this implementation, a sealing film is provided at the end of the filter screen away from the rotating shaft. When the filter screen of the filter assembly is in working condition, the sealing film is attached to the mating position of the filter screen, filling the mating gap, improving the filtration sealing performance of the coarse indium impurity removal gas filtration system, preventing unfiltered gas leakage, and ensuring filtration accuracy.

[0080] With this implementation, the sealing film is placed at the joint end of the filter screen. When the filter screen is in the working position on the inner side wall of the vertical tube, the sealing film buffers the collision impact of the filter screen joint, reduces the wear of the filter screen during long-term joint operation, extends the service life of the filter screen, and reduces equipment maintenance costs.

[0081] like Figure 2 As shown, in some implementations, the mounting bracket 32 ​​is also provided with a vibration assembly 322, which is electrically connected to the cleaning control assembly 4.

[0082] In this implementation, a vibration component 322 can be installed on the side of the fixed frame 32 facing the filter screen 21. The control line of the vibration component 322 is connected to the control loop of the cleaning control component 4, and the cleaning control component 4 uniformly regulates the operating status, operating parameters and start / stop timing of the vibration component 322.

[0083] In some implementations, while multiple cleaning heads 33 are blowing and cleaning the filter screen 21, the cleaning control component 4 controls the vibration component 322 to vibrate and assist in cleaning the filter screen 21.

[0084] In this implementation, a linkage triggering logic for cleaning operations can be set. When the cleaning control component 4 sends a blowing start command to the cleaning head 33, a start command is simultaneously sent to the vibration component 322, so that the vibration force output by the vibration component 322 acts on the filter screen 21, and completes the cleaning of impurities in conjunction with the blowing action.

[0085] It should be noted that during the vibration-assisted cleaning process, the vibration force can loosen and remove stubborn impurities stuck in the pores of the filter screen 21. Combined with the blowing airflow, the impurities are completely removed from the surface of the filter screen 21, effectively reducing the probability of clogging of the filter screen 21 and improving the efficiency of dust removal and impurity recovery.

[0086] For example, during the cleaning operation, the cleaning head 33 first starts to output a blowing airflow with a preset pressure. After a preset time interval, the vibration component 322 starts and outputs a vibration force of a preset frequency to act on the filter screen 21. After running synchronously for a preset time, the vibration component 322 stops running, and the cleaning head 33 continues to blow for a preset time before stopping, thus completing the entire cleaning operation.

[0087] With this implementation, when the cleaning head blows and cleans the filter screen, the cleaning control component controls the vibration component to vibrate and assist in cleaning the filter screen. The two cleaning methods work simultaneously, which can effectively remove stubborn impurities attached to the filter screen and improve the overall cleaning effect.

[0088] This method combines vibration-assisted cleaning and purging cleaning, which reduces the gas pressure required for single purging cleaning, reduces the amount of cleaning gas consumed, and reduces the impact force on the filter screen during the cleaning process, thus extending the service life of the filter screen. After the vibration component works with the cleaning head to complete the cleaning, it can reduce the probability of filter screen clogging, reduce the frequency of cleaning operations, reduce the frequency of manual inspection and maintenance, and ensure the long-term stable operation of the coarse indium impurity removal gas filtration system.

[0089] like Figure 2 and Figure 6 As shown, in some implementations, the mounting bracket 32 ​​is provided with a plurality of scrapers 323 parallel to the axis of rotation of the mounting bracket 32.

[0090] In this implementation, multiple scrapers 323 can be provided on the side of the fixed frame 32 facing the filter screen 21. The extension direction of all scrapers 323 is parallel to the rotation axis of the fixed frame 32. Each scraper 323 can be arranged at equal intervals along the width direction of the fixed frame 32. It can complete the rotation action synchronously with the fixed frame 32 without the need for additional independent drive structure.

[0091] It should be noted that the scraper 323 can be made of wear-resistant and flexible material to avoid scratching and damaging the filter pore structure on the surface of the filter screen 21 during the dust removal process, and to ensure that the filtration performance of the filter screen 21 is not affected by the cleaning operation.

[0092] For example, the scraper 323 can be fixed in the mounting groove of the fixing frame 32 by bolt locking structure, the extension length of each scraper 323 is consistent, and the coverage of all scrapers 323 is completely matched with the effective filtration area of ​​the filter screen 21.

[0093] In some implementations, the pivot of the fixing frame 32 is located above the pivot of the filter screen 21. When the fixing frame 32 presses the filter screen 21 downward to drive the filter screen 21 to rotate from vertical relative to the inner wall of the tube body 1 to parallel relative to the inner wall of the tube body 1 downward, the fixing frame 32 and the filter screen 21 slide relative to each other, so that multiple scrapers 323 scrape the dust off the filter screen 21.

[0094] In this implementation, the rotating shaft of the fixing frame 32 can be set above the rotating shaft of the filter screen 21. During the process of the fixing frame 32 rotating downward and squeezing the filter screen 21 driven by the drive motor 31, there is a height difference between the rotation centers of the two. The contact position of the fixing frame 32 and the filter screen 21 slides relative to each other along the surface of the filter screen 21, which drives multiple scrapers 323 to scrape off the dust attached to the surface of the filter screen 21 layer by layer.

[0095] It should be noted that the dust removal operation of the scraper 323 can be carried out simultaneously with the blowing cleaning of the cleaning head 33 and the vibration-assisted cleaning of the vibration component 322. The different cleaning methods work together to cover the dust cleaning needs of different adhesion strengths without additional energy consumption.

[0096] For example, when the fixing frame 32 rotates from a position perpendicular to the inner wall of the tube body 1 to a position parallel to the inner wall of the tube body 1, the scraper 323 can completely sweep across the entire effective filtration area of ​​the filter screen 21, scraping the dust attached to the surface of the filter screen 21 to the bottom of the tube body 1, and completing the unified recycling of dust in conjunction with the dust discharge port.

[0097] In this implementation, the mounting frame is equipped with multiple scrapers parallel to the rotating shaft of the mounting frame. The rotating shaft of the mounting frame is located above the rotating shaft of the filter screen. As the mounting frame presses the filter screen downwards and rotates, the mounting frame and the filter screen slide relative to each other. The multiple scrapers scrape away dust from the filter screen, greatly improving the cleaning efficiency of the filter screen, reducing stubborn dust residue, and lowering the probability of filter screen clogging.

[0098] With this implementation, the dust removal operation of the scraper can be carried out simultaneously with the cleaning head's blowing and the vibration-assisted cleaning of the vibration component. This allows for multi-mode cleaning without the need for an additional independent drive structure, covering the dust cleaning needs of different adhesion intensities, improving the thoroughness of cleaning, and without increasing the system's operating energy consumption.

[0099] like Figure 2 and Figure 6 As shown, in some implementations, the cleaning component 3 also includes a telescopic frame 34 and a telescopic drive component 35. The telescopic frame 2 is provided with multiple scrapers 323, and the telescopic drive component 35 is used to drive the telescopic frame 2 to extend out of the fixed frame 32 or retract the fixed frame 32.

[0100] In this implementation, a telescopic frame 34 and a telescopic drive assembly 35 are added to the original structure of the cleaning component 3. Multiple scrapers 323 are integrated and set on the bearing end face of the telescopic frame 34. Through the power output of the telescopic drive assembly 35, the telescopic frame 34 is controlled to extend or retract along the preset receiving groove of the fixed frame 32, thereby realizing the adjustment of the working position of multiple scrapers 323.

[0101] It should be noted that the telescopic drive assembly 35 can adopt a scissor telescopic structure driven by a telescopic rod. The fixed end of the scissor telescopic structure is hinged to the inner mounting position of the fixed frame 32, and the movable end is fixedly connected to the back of the telescopic frame 34. The two ends of the telescopic rod are respectively hinged to two corresponding hinge nodes of the scissor telescopic structure.

[0102] For example, when the telescopic rod extends, it can cause the cross bar of the scissor telescopic structure to unfold, thereby pushing the telescopic frame 34 outward to extend into the receiving groove of the fixed frame 32; when the telescopic rod retracts, it can cause the cross bar of the scissor telescopic structure to fold, thereby pulling the telescopic frame 34 inward to retract into the receiving groove of the fixed frame 32.

[0103] In some implementations, before the fixed frame 32 presses down on the filter screen 21 to cause the filter screen 21 to rotate from being perpendicular to the inner wall of the tube body 1 to being parallel to the inner wall of the tube body 1 and downwardly positioned, the telescopic drive assembly 35 drives the telescopic frame 2 to extend out of the fixed frame 32. During the process of the fixed frame 32 pressing down on the filter screen 21 to cause the filter screen 21 to rotate from being perpendicular to the inner wall of the tube body 1 to being parallel to the inner wall of the tube body 1 and downwardly positioned, the fixed frame 32 and the filter screen 21 slide relative to each other, causing multiple scraper blades 323 to scrape away dust from the filter screen 21.

[0104] In this implementation, before the drive frame 32 starts to press the filter screen 21 downwards, an extension control signal can be output to the telescopic drive assembly 35. The telescopic drive assembly 35 outputs power to extend the telescopic frame 34 from the receiving groove of the frame 32, so that the multiple scrapers 323 on the telescopic frame 34 protrude from the surface of the frame 32, and have the working conditions to contact the surface of the filter screen 21.

[0105] For example, the timing of the operation can be preset in the control program. When the system receives the cleaning start command, it first triggers the telescopic drive component 35 to perform the extension action. After the position detection element reports that the telescopic frame 34 has reached the preset extension position, it outputs a rotation control signal to the drive motor 31 to start the downward rotation operation of the fixed frame 32.

[0106] In this implementation, during the downward rotation of the fixed frame 32 and the simultaneous rotation of the filter screen 21, the height difference between the rotating shaft of the fixed frame 32 and the rotating shaft of the filter screen 21 is used to make the bearing surface of the fixed frame 32 and the surface of the filter screen 21 form a relative sliding displacement. At this time, the multiple scrapers 323 protruding from the surface of the fixed frame 32 are in close contact with the surface of the filter screen 21, and the surface dust is scraped off by the relative sliding.

[0107] In some implementations, after the fixing frame 32 presses down on the filter screen 21 to cause the filter screen 21 to rotate from being perpendicular to the inner wall of the tube body 1 to being parallel to the inner wall of the tube body 1 and set downwards, the telescopic drive assembly 35 drives the telescopic frame 2 to retract the fixing frame 32, so as to avoid multiple scrapers 323 interfering with multiple cleaning heads 33 blowing and cleaning the filter screen 21.

[0108] In this implementation, after the fixed frame 32 rotates to a position parallel to and downwardly positioned on the inner sidewall of the tube body 1, and the filter screen 21 rotates synchronously to a parallel position and downwardly positioned, a retraction control signal is output to the telescopic drive assembly 35. The telescopic drive assembly 35 then drives the telescopic frame 34 to retract into the receiving slot of the fixed frame 32, so that the multiple scrapers 323 are completely housed inside the fixed frame 32, without obstructing the air outlet path of the cleaning head 33, thus avoiding interference with subsequent blowing and cleaning operations.

[0109] For example, when the travel detection mechanism detects that the fixed frame 32 has reached a preset position parallel to the inner wall of the tube body 1, it first triggers the telescopic drive assembly 35 to perform a retraction action. After the position detection element reports that the telescopic frame 34 has been completely retracted into the fixed frame 32, the cleaning head 33's air supply passage and the vibration assembly 322's vibration operation are then started to ensure that the airflow can directly act on the surface of the filter screen 21 and will not be blocked by the scraper 323.

[0110] By means of this implementation, the cleaning component is equipped with a telescopic frame and a telescopic drive component. Before the fixed frame squeezes the filter screen downward to rotate, the telescopic drive component drives the telescopic frame to extend out of the fixed frame. Subsequently, when the fixed frame and the filter screen slide relative to each other, multiple scrapers scrape off the dust from the filter screen, effectively improving the dust removal efficiency and ensuring that stubborn dust is thoroughly cleaned.

[0111] With this implementation, after the dust scraping operation is completed, the telescopic drive assembly drives the telescopic frame to retract to the fixed frame, avoiding interference from multiple scrapers on multiple cleaning heads to blow and clean the filter screen, improving the coverage of the blowing and cleaning, and at the same time preventing the scrapers from being eroded by airflow and extending the service life of the components; the telescopic drive assembly, in conjunction with the rotation process of the fixed frame, controls the timing of the telescopic frame's extension and retraction, so that the two cleaning processes of scraping and blowing are smoothly connected, without the need for additional adjustments to the layout of the cleaning components, simplifying the cleaning control logic of the coarse indium impurity removal gas filtration system and reducing operation and maintenance costs.

[0112] like Figure 3 and Figure 6 As shown, in some implementations, the cleaning component 3 also includes a distance detection component 36, which is used to detect the distance from the fixture 32 to the filter screen 21.

[0113] In this implementation, a distance detection component 36 can be added to the supporting components of the cleaning component. The distance detection component 36 collects the distance data between the fixing frame 32 and the filter screen 21, providing accurate data source support for the triggering judgment of subsequent cleaning operations.

[0114] It should be noted that the distance detection component 36 can be a non-contact detection device, which can complete the distance detection without contacting the filter screen 21, thus avoiding interference with the position of the filter screen 21 during the detection process.

[0115] For example, the distance detection component 36 can be an infrared ranging sensor, which is fixed on the side surface of the mounting bracket 32 ​​facing the filter screen 21. The detection end of the sensor is arranged in the direction of the filter screen 21. After being powered on, the distance value between the mounting bracket 32 ​​and the filter screen 21 can be output in real time.

[0116] In some implementations, when the fixing frame 32 presses down on the filter screen 21 until the fixing frame 32 and the filter screen 21 come into contact, and the distance between the fixing frame 32 and the filter screen 21 detected by the distance detection component 36 is greater than a preset distance, the vibration component 322 is activated to vibrate the filter screen 21, and multiple cleaning heads 33 blow clean the filter screen 21. After the vibration component 322 vibrates the filter screen 21 and the multiple cleaning heads 33 blow clean the filter screen 21, the fixing frame 32 presses down on the filter screen 21 to drive the filter screen 21 to rotate from being perpendicular to the inner wall of the tube body 1 to being parallel to the inner wall of the tube body 1.

[0117] In this implementation, the detection data of the distance detection component 36 can be compared with the preset distance threshold. When the fixed frame 32 moves downward to contact the filter screen 21, if the detection value is higher than the preset threshold, the vibration component 322 and the cleaning head 33 can be triggered to perform synchronous cleaning operations to specifically treat the residual impurities on the surface of the filter screen 21.

[0118] It should be noted that starting the pre-cleaning operation in this state can loosen the large particles of impurities and some of the accumulated dust attached to the surface of the filter screen 21, reduce the resistance of the subsequent scraping operation, prevent the impurities from being too hard and damaging the filter screen 21, and improve the effect of the subsequent multiple scrapers 323 on the dust removal of the filter screen 21.

[0119] For example, the preset distance can be preset according to the thickness of the filter screen 21. When the fixing frame 32 abuts against the filter screen 21 and the detection distance exceeds the preset distance, it can be determined that there is a dust layer on the surface of the filter screen 21 that exceeds the allowable thickness. At this time, the vibration component 322 is activated to generate high-frequency vibration to loosen the dust, and at the same time, multiple cleaning heads 33 spray high-pressure gas to blow away the loose impurities on the surface.

[0120] In this implementation, after all the pre-cleaning work is completed, the fixing frame 32 can be controlled to continue to apply downward pressure, causing the filter screen 21 to rotate around its own axis, rotating from the working state perpendicular to the inner wall of the tube body 1 to the storage and cleaning state parallel to the inner wall of the tube body 1, so that the scraping operation can be carried out smoothly.

[0121] For example, the operation time of vibration and blowing can be preset. After the set time is reached, the pre-cleaning is determined to be completed. At this time, the drive motor 31 outputs power to drive the fixed frame 32 to continue to rotate downward. The filter screen 21 is subjected to the squeezing force and rotates synchronously along the path of the spring guide rail 22 and the reset guide rail 24 until it is adjusted to a position parallel to the inner wall of the tube body 1.

[0122] This method allows the distance detection component to detect the distance between the fixed frame and the filter screen in real time. After the fixed frame presses the filter screen downwards until the two come into contact, if the detected distance is greater than the preset distance, the vibration component is activated to vibrate the filter screen. At the same time, the cleaning head blows and cleans the filter screen. After the operation is completed, the filter screen is rotated, which effectively avoids direct rotation and scraping damage to the screen surface when a large amount of impurities remain, thus improving the service life of the filter screen.

[0123] With this implementation, the distance detection component can accurately identify the thickness of impurities remaining on the filter screen and trigger cleaning operations based on the amount of residue. This eliminates the need to start the cleaning process at a fixed frequency, effectively reducing unnecessary energy consumption, improving the targeting of cleaning, and reducing the proportion of ineffective cleaning operations.

[0124] Figure 10 This is a schematic flowchart of a gas filtration control method provided in an embodiment of this application, as shown below. Figure 10 As shown in the embodiments of this application, a gas filtration control method is also provided, which uses the crude indium impurity removal gas filtration system described above. The method includes steps S110 to S120, which are described in detail below.

[0125] S110, the initial position of the fixing bracket 32 ​​is parallel to and upward relative to the inner wall of the tube body 1. The drive motor 31 drives the fixing bracket 32 ​​to rotate along the first side of the fixing bracket 32.

[0126] In this implementation, the above-mentioned crude indium impurity removal gas filtration system can be used to execute this gas filtration control process. The crude indium impurity removal gas filtration system can adjust the parameters of the corresponding pipe body 1, filter component 2 and cleaning component 3 according to the gas processing volume of the crude indium production workshop. The control method can be directly adapted to the adjusted system parameters.

[0127] In this implementation, the initial position of the fixing bracket 32 ​​can be set to be parallel to the inner wall of the tube body 1 and upward. In this state, the fixing bracket 32 ​​is arranged to fit the inner wall of the tube body 1 as a whole, without occupying the internal gas flow space of the tube body 1, thus avoiding obstruction of the flow channel for normal gas filtration operations.

[0128] For example, when the mounting bracket 32 ​​is in the initial position, the cleaning head 33 arranged on its surface faces the inner wall of the tube body 1, and the gap between it and the inner wall of the tube body 1 can be set to less than 1 cm, completely avoiding the gas flow path of the tube body 1, and will not affect the wind pressure stability of the normal filtration process.

[0129] S120. When the fixing frame 32 rotates from being parallel to and upward relative to the inner wall of the tube 1 to being parallel to the inner wall of the tube 1, the fixing frame 32 presses the filter screen 21 downward, causing the filter screen 21 to rotate from being vertical relative to the inner wall of the tube 1 to being parallel to and downward relative to the inner wall of the tube 1. Multiple cleaning heads 33 blow and clean the filter screen 21 while the fixing frame 32 presses it downward. After the filter screen 21 is blown and cleaned, the drive motor 31 drives the fixing frame 32 to be parallel to and downward relative to the inner wall of the tube 1, and then back to being parallel to and upward relative to the inner wall of the tube 1.

[0130] In this implementation, the drive motor 31 can output torque to drive the fixed frame 32 to rotate along the first side connected to the inner wall of the pipe body 1. The rotation speed and start / stop timing during the rotation process can be controlled by the control logic of the drive motor 31 to adapt to different cleaning operation needs.

[0131] For example, the drive motor 31 can be configured with a corresponding speed control module to adjust the rotation speed according to the amount of dust attached to the filter screen 21. When the amount of dust attached is large, the rotation speed is reduced to prolong the cleaning operation time, and when the amount of dust attached is small, the rotation speed is increased to shorten the cleaning time.

[0132] In this implementation, during the process of the fixed frame 32 rotating from vertical to parallel relative to the inner wall of the tube body 1, the fixed frame 32 can use its own weight and rotational force to squeeze the filter screen 21 downward, causing the filter screen 21 to rotate synchronously along its own axis. The position switching of the filter screen can be completed without adding an independent drive structure to the filter screen 21.

[0133] For example, the rotation stroke of the fixing frame 32 and the rotation stroke of the filter screen 21 are perfectly matched. When the fixing frame 32 rotates to a position parallel to the inner wall of the tube body 1, the filter screen 21 rotates synchronously to a position parallel to the inner wall of the tube body 1. The two remain in contact throughout the entire process to avoid relative slippage.

[0134] In this implementation, while the fixed frame 32 is pressing the filter screen 21 and rotating synchronously, multiple cleaning heads 33 can be activated to output a blowing airflow, which directly acts on the surface of the filter screen 21 to blow away the coarse indium dust adhering to the surface of the filter screen 21, thus completing the filter screen cleaning operation. After the filter screen 21 is cleaned by blowing, the drive motor 31 drives the fixed frame 32 to be parallel to the inner wall of the tube body 1 and set downwards, and then to be parallel to the inner wall of the tube body 1 and set upwards. At this time, the filter screen 21 returns to a position perpendicular to the tube body 1 to continue gas filtration.

[0135] For example, the purge airflow output by the cleaning head 33 can be filtered clean and impurity-removed gas. The airflow carrying dust after purge can be directly collected at the dust outlet at the bottom of the tube body 1, without causing secondary pollution, and at the same time improving the dust recovery efficiency.

[0136] With this implementation, the drive motor drives the fixed frame to rotate along the side. When the fixed frame rotates, it squeezes the filter screen downwards, causing the filter screen to rotate synchronously. During the process, multiple cleaning heads blow and clean the filter screen. The filter screen can be cleaned without interrupting the gas filtration operation, which improves the continuity of the crude indium impurity removal gas filtration operation and reduces equipment downtime losses.

[0137] With this method, the mounting bracket and filter screen are completely fitted during cleaning operations, and the cleaning head's blowing range covers the entire effective filtration area of ​​the filter screen, eliminating cleaning dead corners. Cleaning can be completed without manual disassembly of the filter screen, significantly reducing manual cleaning costs and avoiding the risk of structural damage during filter screen disassembly and assembly. The initial position of the mounting bracket is parallel to the inner wall of the tube, so it will not block the normal filtration gas flow channel or interfere with the normal filtration gas throughput, ensuring stable air pressure during the filtration process and improving the uniformity and filtration accuracy of the gas treatment for coarse indium impurity removal.

[0138] In some implementations, the above method also includes S130 to S140, which are described in detail below.

[0139] S130, the cleaning control component 4 controls the vibration component 322 to perform vibration-assisted cleaning of the filter screen 21.

[0140] In this implementation, the cleaning control component 4 can send control commands to the vibration component 322. During the synchronous phase of the cleaning head 33 performing the blowing cleaning operation, the vibration component 322 is started to provide high-frequency vibration force to the filter screen 21, which accelerates the removal of impurities attached to the surface and pores of the filter screen 21 and enhances the overall cleaning effect.

[0141] For example, the vibration frequency of the vibration component 322 can be adapted and adjusted according to the adhesion strength of the impurities attached to the filter screen 21. During the vibration process, the relative position of the filter screen 21 is not changed. The impurities are detached from the screen surface only by high-frequency oscillation, which can avoid causing rigid damage to the structure of the filter screen 21.

[0142] After the multiple cleaning heads 33 have finished cleaning the filter screen 21 by blowing, when the reset spring 23 drives the filter screen 21 to reset along the spring guide rail 22, the cleaning control component 4 controls the electromagnet component 321 to attract the filter screen 21 to assist the filter screen 21 in resetting.

[0143] In this implementation, after the multiple cleaning heads 33 have completed all the blowing and cleaning operations on the filter screen 21, the operation of the vibration component 322 and the cleaning head 33 can be stopped first, and then the reset process can be triggered.

[0144] In this implementation, the reset driving force can be provided by the reset spring 23, which drives the filter screen 21 to move along the spring guide rail 22 to the working position. At the same time, the cleaning control component 4 outputs a conducting current to the electromagnet component 321, so that the electromagnet component 321 generates a magnetic attraction force that acts on the iron filter screen 21 frame, helping the filter screen 21 overcome the jamming resistance during the movement and quickly and accurately return to the preset working position.

[0145] For example, the magnitude of the attraction force of the electromagnet assembly 321 can be dynamically adjusted according to the attenuation of the elastic force of the reset spring 23. When the elastic force of the reset spring 23 decreases due to the increase in the length of time it has been used, the conduction current of the electromagnet can be appropriately increased to increase the attraction force and ensure that the reset action is completed stably.

[0146] Through this implementation, the cleaning control component controls the vibration component to perform vibration-assisted cleaning of the filter screen. While the cleaning head blows and cleans the filter screen, the vibration can shake off stubborn impurities attached to the pores of the filter screen, preventing impurities from being stuck in the gaps of the filter screen and difficult to be blown away by the airflow. This greatly improves the thoroughness of a single cleaning, reduces the impurities remaining on the filter screen, and extends the single-use time of the filter screen.

[0147] With this implementation, after the purging and cleaning is completed, when the reset spring drives the filter screen to reset along the spring guide rail, the cleaning control component controls the electromagnet component to attract the iron-structured filter screen, offsetting any possible filter screen jamming resistance during the reset process. This assists the filter screen in smoothly completing the reset action, avoiding leakage problems in the filtration path caused by incomplete filter screen reset, and ensuring the sealing and filtration effect of subsequent filtration processes. The entire cleaning process does not require disassembling the tube to remove the filter screen. The entire process of vibration cleaning, purging cleaning, and filter screen reset is completed online without interrupting the gas filtration process of coarse indium impurity removal. This effectively reduces the operational complexity of the cleaning process, reduces downtime for cleaning, and improves the overall operating efficiency of the gas filtration operation.

[0148] In some implementations, the above method also includes S210 to S220, which will be described in detail below.

[0149] S210. Before the fixed frame 32 presses down on the filter screen 21 to cause the filter screen 21 to rotate from being perpendicular to the inner wall of the tube body 1 to being parallel to the inner wall of the tube body 1 and positioned downwards, the telescopic drive assembly 35 drives the telescopic frame 2 to extend out of the fixed frame 32. During the process of the fixed frame 32 pressing down on the filter screen 21 to cause the filter screen 21 to rotate from being perpendicular to the inner wall of the tube body 1 to being parallel to the inner wall of the tube body 1, the fixed frame 32 and the filter screen 21 slide relative to each other, so that multiple scrapers 323 scrape off the dust from the filter screen 21.

[0150] In this implementation, before the drive frame 32 starts to press the filter screen 21 downwards, an extension control signal can be output to the telescopic drive assembly 35. The telescopic drive assembly 35 outputs power to extend the telescopic frame 34 from the receiving groove of the frame 32, so that the multiple scrapers 323 on the telescopic frame 34 protrude from the surface of the frame 32, and have the working conditions to contact the surface of the filter screen 21.

[0151] In this implementation, during the downward rotation of the fixed frame 32 and the simultaneous rotation of the filter screen 21, the height difference between the rotating shaft of the fixed frame 32 and the rotating shaft of the filter screen 21 is used to make the bearing surface of the fixed frame 32 and the surface of the filter screen 21 form a relative sliding displacement. At this time, the multiple scrapers 323 protruding from the surface of the fixed frame 32 are in close contact with the surface of the filter screen 21, and the surface dust is scraped off by the relative sliding.

[0152] S220. When the fixing frame 32 presses down on the filter screen 21 to cause the filter screen 21 to rotate from being perpendicular to the inner wall of the tube body 1 to being parallel to the inner wall of the tube body 1 and set downwards, the telescopic drive assembly 35 drives the telescopic frame 2 to retract the fixing frame 32, so as to avoid the multiple scrapers 323 interfering with the multiple cleaning heads 33 in blowing and cleaning the filter screen 21. The multiple cleaning heads 33 blow and clean the filter screen 21.

[0153] In this implementation, after the fixed frame 32 rotates to a position parallel to and downwardly positioned on the inner sidewall of the tube body 1, and the filter screen 21 rotates synchronously to a parallel position and downwardly positioned, a retraction control signal is output to the telescopic drive assembly 35. The telescopic drive assembly 35 then drives the telescopic frame 34 to retract into the receiving slot of the fixed frame 32, so that the multiple scrapers 323 are completely housed inside the fixed frame 32, without obstructing the air outlet path of the cleaning head 33, thus avoiding interference with subsequent blowing and cleaning operations.

[0154] By means of this implementation, the cleaning component is equipped with a telescopic frame and a telescopic drive component. Before the fixed frame squeezes the filter screen downward to rotate, the telescopic drive component drives the telescopic frame to extend out of the fixed frame. Subsequently, when the fixed frame and the filter screen slide relative to each other, multiple scrapers scrape off the dust from the filter screen, effectively improving the dust removal efficiency and ensuring that stubborn dust is thoroughly cleaned.

[0155] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A crude indium impurity removal gas filtration system, characterized by, It includes a tube body, two filter components and two cleaning components. The tube body is arranged vertically and has a dust discharge port at the bottom end that can be sealed or opened to discharge dust. The two filter components are arranged opposite each other on a set of opposite inner sidewalls of the tube body, and the two cleaning components are arranged opposite each other on a set of opposite inner sidewalls of the tube body. The filter assembly includes a filter screen, a spring guide rail, a reset spring, and a reset guide rail. The first side of the filter screen is rotatably connected to the first inner wall of the tube. A spring guide post and a reset guide post are provided on the adjacent side of the first side of the filter screen. The spring guide rail and the reset guide rail are located on the adjacent inner walls of the first inner wall of the tube. The reset spring and the spring guide post are located inside the spring guide rail. The reset spring is used to drive the spring guide post to move the filter screen to reset along the spring guide rail. The guide post is located on the adjacent side of the first side of the filter screen. The reset guide post is slidably connected to the reset guide rail to guide the filter screen. The stroke of the reset guide rail covers the range of the filter screen from rotating vertically relative to the inner wall of the tube to rotating parallel to the inner wall of the tube and downward. The cleaning assembly includes a drive motor, a mounting bracket, and multiple cleaning heads. A first side of the mounting bracket is rotatably connected to the first inner wall of the tube. An array of cleaning heads is arranged on the mounting bracket. The drive motor drives the mounting bracket to rotate along the first side of the mounting bracket. The stroke of the drive motor driving the mounting bracket covers the range from the mounting bracket being parallel to and upward relative to the inner wall of the tube to the mounting bracket being parallel to and downward relative to the inner wall of the tube. The rotation axis of the mounting bracket is parallel to the rotation axis of the filter screen. When the mounting bracket rotates from being parallel to and upward relative to the inner wall of the tube to being parallel to and downward relative to the inner wall of the tube, the mounting bracket presses the filter screen downward, causing the filter screen to rotate from being perpendicular to the inner wall of the tube to being parallel to and downward relative to the inner wall of the tube. The multiple cleaning heads are used to blow clean the filter screen when the mounting bracket presses the filter screen downward. After blowing clean the filter screen, the drive motor drives the mounting bracket to rotate from being parallel to and downward relative to the inner wall of the tube to being parallel to and upward relative to the inner wall of the tube.

2. The crude indium impurity removal gas filtration system of claim 1, wherein, It also includes a cleaning control component, and an electromagnet assembly is provided on the mounting bracket. The electromagnet assembly and the cleaning control component are electrically connected. The filter screen frame is made of iron. When the reset spring drives the filter screen to reset along the spring guide rail, the cleaning control component controls the electromagnet component to attract the filter screen to assist in the reset of the filter screen.

3. The crude indium impurity removal gas filtration system according to claim 2, characterized in that, A sealing film is provided at the end of the filter screen away from the rotating shaft. The sealing film is used to seal between the filter screens of the two filter components.

4. The crude indium impurity removal gas filtration system according to claim 3, characterized in that, The mounting bracket is also equipped with a vibration assembly, which is electrically connected to the cleaning control assembly; While multiple cleaning heads are blowing and cleaning the filter, the cleaning control component controls the vibration component to vibrate the filter to assist in cleaning.

5. The crude indium impurity removal gas filtration system according to claim 4, characterized in that, The mounting bracket is equipped with multiple scrapers that are parallel to the rotating shaft of the mounting bracket; The rotating shaft of the fixed frame is located above the rotating shaft of the filter screen. When the fixed frame presses the filter screen downward to drive the filter screen to rotate from vertical relative to the inner wall of the tube to parallel relative to the inner wall of the tube downward, the fixed frame and the filter screen slide relative to each other, so that multiple scrapers scrape off the dust from the filter screen.

6. The crude indium impurity removal gas filtration system according to claim 4, characterized in that, The cleaning assembly also includes a telescopic frame and a telescopic drive assembly. The telescopic frame is equipped with multiple scrapers, and the telescopic drive assembly is used to drive the telescopic frame to extend out of the fixed frame or retract the fixed frame. Before the fixed frame presses the filter screen downward to drive the filter screen to rotate from vertical relative to the inner wall of the tube to parallel and downward relative to the inner wall of the tube, the telescopic drive assembly drives the telescopic frame to extend out of the fixed frame; during the process of the fixed frame pressing the filter screen downward to drive the filter screen to rotate from vertical relative to the inner wall of the tube to parallel and downward relative to the inner wall of the tube, the fixed frame and the filter screen slide relative to each other, so that multiple scrapers scrape off the dust from the filter screen. When the fixed frame presses the filter screen downwards to rotate it from being perpendicular to the inner wall of the tube to being parallel to the inner wall of the tube and set downwards, the telescopic drive assembly drives the telescopic frame to retract the fixed frame to avoid multiple scrapers interfering with multiple cleaning heads blowing and cleaning the filter screen.

7. The crude indium impurity removal gas filtration system according to claim 6, characterized in that, The cleaning components also include a distance detection component, which is used to detect the distance between the mounting bracket and the filter screen; When the mounting bracket presses the filter screen downwards until the mounting bracket and the filter screen come into contact, and the distance between the mounting bracket and the filter screen detected by the distance detection component is greater than the preset distance, the vibration component is activated to vibrate the filter screen, and multiple cleaning heads are used to blow and clean the filter screen. After the vibration component vibrates the filter screen and the multiple cleaning heads blow and clean the filter screen, the mounting bracket presses the filter screen downwards to drive the filter screen to rotate from being perpendicular to the inner wall of the tube to being parallel to the inner wall of the tube.

8. A gas filtration control method, characterized in that, The crude indium impurity removal gas filtration system according to any one of claims 1 to 7, the method comprising: The initial position of the fixing bracket is parallel to and upward relative to the inner wall of the tube; the drive motor drives the fixing bracket to rotate along the first side of the fixing bracket; As the fixing frame rotates from being parallel to and upward relative to the inner wall of the tube to being parallel to the inner wall of the tube, the fixing frame presses the filter screen downward, causing the filter screen to rotate from being vertical relative to the inner wall of the tube to being parallel to and downward relative to the inner wall of the tube; multiple cleaning heads blow and clean the filter screen while the fixing frame presses the filter screen downward.

9. The gas filtration control method according to claim 8, characterized in that, The method further includes: The cleaning control component controls the vibration component to vibrate the filter screen for cleaning assistance. After multiple cleaning heads have finished blowing and cleaning the filter screen, when the reset spring drives the filter screen to reset along the spring guide rail, the cleaning control component controls the electromagnet component to attract the filter screen to assist in the reset of the filter screen.

10. The gas filtration control method according to claim 9, characterized in that, The method further includes: Before the fixed frame presses the filter screen downward to drive the filter screen to rotate from vertical relative to the inner wall of the tube to parallel relative to the inner wall of the tube and set downward, the telescopic drive assembly drives the telescopic frame to extend out of the fixed frame; during the process of the fixed frame pressing the filter screen downward to drive the filter screen to rotate from vertical relative to the inner wall of the tube to parallel relative to the inner wall of the tube, the fixed frame and the filter screen slide relative to each other, so that multiple scrapers scrape off the dust from the filter screen. When the fixed frame presses the filter screen downwards to cause the filter screen to rotate from being vertical relative to the inner wall of the tube to being parallel to the inner wall of the tube and set downwards, the telescopic drive assembly drives the telescopic frame to retract the fixed frame, so as to avoid multiple scrapers interfering with multiple cleaning heads blowing and cleaning the filter screen; multiple cleaning heads blow and clean the filter screen.

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