Waste gas purification device

Abstract

The waste gas purification device comprises a tank body and a tank cover detachably connected with the tank body, a gas inlet pipe, a gas outlet pipe and a discharge pipe are arranged on the tank body, the waste gas purification device further comprises a scraping rod, a filter screen plate and an elastic piece, the scraping rod is rotatably installed in the tank body through a driving assembly and used for pushing and scraping the cavity wall of the tank body, the filter screen plate is arranged in the tank body, and the elastic piece is arranged on the tank cover. The elastic piece is located below the filter screen plate, a protrusion is formed on the scraping rod, and an inclined groove allowing the protrusion to stretch into is formed in the filter screen plate. According to the waste gas purification device, the scraping rod can push and scrape particulate matters accumulated on the cavity wall of the tank body through the driving assembly, so that the cavity wall of the tank body is cleaned, and the waste gas purification effect is improved; the filter screen plate can be automatically cleaned through a scraping rod, and the cleaning efficiency of the filter screen plate is improved; particulate matters accumulated on the filter screen plate can be shaken off through the elastic piece, and water or other liquid media do not need to be used for washing the filter screen plate, so that the cleaning cost of the filter screen plate is saved, and the waste of resources is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas purification device. Background Art

[0002] RTO is a regenerative thermal oxidizer. Its working principle is to convert volatile organic compounds (VOCs) in exhaust gas into carbon dioxide and water under high temperature environment, so as to purify the exhaust gas; at the same time, the process can also recover the heat released when the exhaust gas is decomposed. Specifically, the exhaust gas decomposition efficiency of the three-chamber RTO is as high as over 99%, and the heat recovery efficiency is also over 95%. Compared with catalytic combustion and direct-fired thermal oxidizers, regenerative thermal oxidizers have the characteristics of high thermal efficiency (at least 95%), low operating cost, and the ability to efficiently handle large air volumes and medium and low concentration exhaust gases.

[0003] The applicant disclosed an RTO thermal storage oxidizer in the patent with the announcement number CN214370260U, which includes a shell and a pipe system connected to the inside of the shell, wherein a combustion chamber is arranged in the middle of the shell, an oxidation chamber is arranged on one side of the combustion chamber, and a first thermal storage chamber and a second thermal storage chamber are arranged on the other side, the first thermal storage chamber and the second thermal storage chamber are separated by a spacer, and thermal storage bodies are arranged in the oxidation chamber, the first thermal storage chamber and the second thermal storage chamber respectively, and the pipe system exhausts and supplies gas to the first thermal storage chamber, the second thermal storage chamber and the oxidation chamber. The RTO thermal storage oxidizer arranges the oxidation chamber and the thermal storage chamber on both sides of the combustion chamber respectively, simplifies the processing flow of the thermal storage bodies in the oxidation chamber and the two thermal storage chambers, thereby simplifying the control method of the valves for controlling the opening and closing of each gas flow pipeline, and also reduces the energy consumption of repeatedly heating the thermal storage bodies in the thermal storage chambers.

[0004] It can be seen from the above patent that although the RTO thermal storage oxidation furnace simplifies the processing flow of the heat storage body in the oxidation chamber and the two heat storage chambers, simplifies the control method of the valves that control the opening and closing of each gas flow pipe, and reduces the energy consumption of repeated heating of the heat storage body in the heat storage chamber, in actual use, since no relevant exhaust gas filtration system is set inside the shell and the pipeline system, it is impossible to filter the exhaust gas, resulting in the heat storage holes on the heat storage body being easily blocked by impurities in the exhaust gas, which not only easily affects the normal operation of the device and reduces the working efficiency of the device, but also requires frequent maintenance by the staff, increasing the labor intensity of the staff; at the same time, the existing exhaust gas purification device can usually only clean the filter screen, but cannot effectively clean the shell or tank wall of the device, which easily causes the accumulation of particulate matter in the device, reducing the purification effect of the exhaust gas particulate matter. Utility Model Content

[0005] The main purpose of the utility model is to provide a waste gas purification device, aiming to solve the problem that the existing RTO thermal storage oxidation furnace cannot filter the waste gas, which easily affects the normal operation of the device, reduces the work efficiency, increases the labor intensity of the staff, and cannot effectively clean the shell or tank wall of the device, thereby reducing the purification effect of the waste gas particulate matter.

[0006] To achieve the above-mentioned purpose, the utility model provides an exhaust gas purification device, which is used to be connected with the air intake pipeline of the RTO thermal storage oxidation furnace and filter out particulate matter in the exhaust gas, including a tank body and a tank cover detachably connected to the tank body, the tank body is provided with an air inlet pipe, an air outlet pipe and a discharge pipe, and also includes a scraper rod, a filter screen plate and an elastic member, the scraper rod is rotatably installed in the tank body through a driving assembly and is used to push and scrape the cavity wall of the tank body, the filter screen plate is arranged in the tank body, the elastic member is located below the filter screen plate and is used to drive the filter screen plate to abut against the scraper rod, a protrusion is formed on the scraper rod, and an inclined groove for the protrusion to extend into is opened on the filter screen plate.

[0007] Preferably, the tank body comprises an upper tank body and a lower tank body, the lower tank body is detachably connected to the upper tank body, an annular flange for mounting the filter screen is formed near the tank mouth in the inner cavity of the lower tank body, a plurality of mounting holes are formed on the side of the annular flange facing the upper tank body, the plurality of mounting holes are evenly and spaced apart along the circumference of the annular flange, an elastic member is fixedly mounted in each of the plurality of mounting holes, and one end of any elastic member away from the annular flange extends out of the mounting hole and is connected to the filter screen.

[0008] Preferably, the driving assembly includes a motor and a transmission shaft, the motor is vertically arranged on the tank cover, the output shaft of the motor extends into the tank body and is detachably connected to the transmission shaft, the extension direction of the transmission shaft is consistent with the extension direction of the motor output shaft, and the scraper rod is detachably mounted on the transmission shaft.

[0009] Preferably, the scraper rod includes two mutually perpendicular cross bars and vertical bars, the two cross bars are arranged at intervals on the transmission shaft and are detachably connected to the transmission shaft, the two ends of the two vertical bars are respectively connected to the two ends of the two cross bars in a one-to-one correspondence, the two vertical bars are used to abut against the cavity wall of the upper tank body, and the cross bar away from the tank cover is used to abut against the filter screen.

[0010] Preferably, at least two inclined grooves are provided on the filter screen plate, any of the inclined grooves extend along the circumferential direction of the filter screen plate, a first slope is formed from top to bottom in any of the inclined grooves, and a protrusion is formed at a position corresponding to any of the inclined grooves on the cross bar away from the tank cover, and any of the protrusions has a guide slope along the circumferential direction of the filter screen plate.

[0011] Preferably, a second slope is formed on one side of any one of the horizontal rod and the vertical rod along their respective extending directions.

[0012] Preferably, a collecting cylinder is detachably mounted on the discharge pipe, a window is provided on the outer wall of the collecting cylinder, and a transparent baffle is provided at the window.

[0013] Preferably, a support frame is arranged on the outer wall of the tank body, and the support frame comprises a plurality of support legs evenly and spaced apart along the circumference of the tank body.

[0014] Beneficial effects:

[0015] 1. In an exhaust gas purification device of the utility model, a scraper rod is rotatably installed in a tank body through a driving assembly, so that the scraper rod can rotate relative to the tank body under the action of the driving assembly and thereby push and scrape the particulate matter accumulated on the cavity wall of the tank body, thereby achieving cleaning of the cavity wall of the tank body, which not only improves the purification effect of the utility model on the exhaust gas particulate matter, but also prevents the tank body from being corroded due to the long-term adhesion and accumulation of acidic substances in the exhaust gas, thereby extending the service life of the utility model, and there is no need for the staff to manually clean the cavity wall of the tank body, which reduces the labor intensity of the staff and is reliable to use.

[0016] 2. In an exhaust gas purification device of the utility model, impurities, particulate matter, etc. in the exhaust gas can be filtered through a filter mesh plate, thereby reducing the particulate matter content in the exhaust gas, and effectively preventing the particulate matter in the exhaust gas from entering the RTO thermal storage oxidizer and causing blockage of the heat storage body. This not only reduces the probability of failure of the RTO thermal storage oxidizer, but also extends the maintenance cycle of the RTO thermal storage oxidizer and improves the exhaust gas treatment efficiency.

[0017] 3. In an exhaust gas purification device of the utility model, the filter screen is always in contact with the scraper rod through the rebound effect of the elastic member. At the same time, because the scraper rod can rotate relative to the tank body through the driving assembly, the scraper rod can push and scrape the impurities, particulate matter, etc. adhered and accumulated on the filter screen, thereby realizing automatic cleaning of the filter screen without the need for staff to manually clean the filter screen, thereby reducing the labor intensity of the staff, improving the cleaning efficiency of the filter screen, and facilitating use.

[0018] 4. In an exhaust gas purification device of the utility model, the rebound vibration of the filter screen is achieved by an elastic member, which can cooperate with the scraper rod to shake off the particulate matter accumulated on the filter screen, further improving the cleaning effect of the filter screen. The structural design is simple and reasonable, and there is no need to use water or other liquid media to flush the filter screen, which saves the cleaning cost of the filter screen, avoids waste of resources, and is reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a structural schematic diagram of an exhaust gas purification device in one embodiment of the utility model at a viewing angle;

[0021] Figure 2 This is an exploded view of an exhaust gas purification device according to an embodiment of the utility model;

[0022] Figure 3 This is a partial structural schematic diagram of an exhaust gas purification device according to an embodiment of the utility model;

[0023] Figure 4 This is a top view of an exhaust gas purification device according to an embodiment of the utility model;

[0024] Figure 5 yes Figure 4 Cross-sectional view at AA in the middle;

[0025] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0026] Figure 7 It is a structural schematic diagram of a filter screen plate in an exhaust gas purification device according to an embodiment of the utility model.

[0027] In the figure: 1-inlet pipe; 2-outlet pipe; 3-discharge pipe; 4-scraper rod; 5-filter screen; 6-elastic member; 7-protrusion; 8-slanted groove; 9-upper tank body; 10-lower tank body; 11-annular flange; 12-mounting hole; 13-motor; 14-drive shaft; 15-cross bar; 16-vertical bar; 17-first slope; 18-second slope; 19-collecting cylinder; 20-window; 21-support frame. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Embodiment 1:

[0035] The utility model provides an exhaust gas purification device.

[0036] In one embodiment of the utility model, an exhaust gas purification device is used to communicate with the air intake pipeline of the RTO thermal storage oxidation furnace and filter out particulate matter in the exhaust gas, including a tank body and a tank cover detachably connected to the tank body, the tank body is provided with an air intake pipe 1, an air outlet pipe 2 and a discharge pipe 3, and also includes a scraper rod 4, a filter screen plate 5 and an elastic member 6. The scraper rod 4 is rotatably installed in the tank body through a driving assembly and is used to push and scrape the cavity wall of the tank body. The filter screen plate 5 is arranged in the tank body. The elastic member 6 is located below the filter screen plate 5 and is used to drive the filter screen plate 5 to abut against the scraper rod 4. A protrusion 7 is formed on the scraper rod 4, and an inclined groove 8 for the protrusion 7 to extend into is opened on the filter screen plate 5.

[0037] Specifically, Figures 1 to 7 As shown, in an exhaust gas purification device of the utility model, since the tank cover and the tank body are detachably connected, the detachable connection method can be a threaded connection, and the threaded connection is convenient for disassembly and assembly, so it is convenient to open or close the tank cover to disassemble and replace the scraper, filter screen plate 5 and other components inside the tank body, which is conducive to maintenance; at the same time, by connecting the air inlet pipe 1 on the tank body with the air supply pipeline in the exhaust gas treatment system, and connecting the air outlet pipe 2 with the air inlet pipe 1 of the RTO thermal storage oxidation furnace, the exhaust gas enters the tank body through the air inlet pipe 1, and the impurities and particulate matter are filtered, and the filtered exhaust gas is transported to the RTO thermal storage oxidation furnace by the air outlet pipe 2, thereby realizing the purification of the exhaust gas, and the structural design is simple and reasonable.

[0038] Furthermore, since the scraper rod 4 is rotatably installed in the tank body through the driving assembly, the scraper rod 4 can rotate relative to the tank body under the action of the driving assembly and thereby push and scrape the particulate matter accumulated on the tank body cavity wall, thereby achieving the cleaning of the tank body cavity wall, which not only improves the purification effect of the utility model on the exhaust gas particulate matter, but also prevents the tank body from being corroded due to the long-term adhesion and accumulation of acidic substances in the exhaust gas, thereby extending the service life of the utility model, and there is no need for the staff to manually clean the tank body cavity wall, which reduces the labor intensity of the staff and is reliable to use.

[0039] It can be understood that since the filter mesh plate 5 is provided in the tank body, impurities, particulate matter, etc. in the exhaust gas can be filtered through the filter mesh plate 5, thereby reducing the particulate matter content in the exhaust gas, and effectively preventing the particulate matter in the exhaust gas from entering the RTO thermal storage oxidizer and causing blockage of the thermal storage body. This not only reduces the probability of failure of the RTO thermal storage oxidizer, but also extends the maintenance cycle of the RTO thermal storage oxidizer and improves the exhaust gas treatment efficiency. When the filter screen plate 5 needs to be cleaned, since the elastic member 6 is located below the filter screen plate 5, the elastic member 6 can be selected as a spring in the prior art, which has the characteristics of compact structure, large elastic deformation force and easy material acquisition. The filter screen plate 5 is always in contact with the scraper rod 4 through the rebound effect of the elastic member 6. At the same time, since the scraper rod 4 can rotate relative to the tank body through the driving assembly, the scraper rod 4 can push and scrape the impurities, particulate matter, etc. attached and accumulated on the filter screen plate 5, thereby realizing automatic cleaning of the filter screen plate 5 without the need for the staff to manually clean the filter screen plate 5, thereby reducing the labor intensity of the staff, improving the cleaning efficiency of the filter screen plate 5, and being easy to use.

[0040] In addition, since the scraper rod 4 is provided with a protrusion 7 and the filter screen plate 5 is provided with an inclined groove 8 for the protrusion 7 to extend into, the inclined groove 8, i.e., the bottom of the groove is a groove inclined from top to bottom along its extension direction, when the scraper rod 4 is driven by the driving assembly to rotate relative to the tank body, the protrusion 7 extends out of the inclined groove 8 along the extension direction of the inclined groove 8. At this time, the top end of the protrusion 7 abuts against the top surface of the filter screen plate 5, so that the filter screen plate 5 moves downward and compresses the elastic member 6. When the scraper rod 4 continues to rotate, the protrusion 7 re-extends into the inclined groove 8. At this time, the top of the protrusion 7 is out of contact with the top surface of the filter screen plate 5, the elastic member 6 rebounds and lifts the filter screen plate 5 upward, and then the elastic member 6 realizes the rebound vibration of the filter screen plate 5, thereby cooperating with the scraper rod 4 to shake off the particulate matter accumulated on the filter screen plate 5, further improving the cleaning effect of the filter screen plate 5. The structural design is simple and reasonable, and there is no need to use water or other liquid media to flush the filter screen plate 5, which saves the cleaning cost of the filter screen plate 5, avoids the waste of resources, and is reliable to use.

[0041] In one embodiment, the tank body includes an upper tank body 9 and a lower tank body 10, and the lower tank body 10 is detachably connected to the upper tank body 9. An annular flange 11 for mounting the filter screen 5 is formed near the tank mouth of the inner cavity of the lower tank body 10. The annular flange 11 is provided with a plurality of mounting holes 12 on the side facing the upper tank body 9. The plurality of mounting holes 12 are evenly and spaced apart along the circumference of the annular flange 11. An elastic member 6 is fixedly installed in each of the plurality of mounting holes 12, and one end of any elastic member 6 away from the annular flange 11 extends out of the mounting hole 12 and is connected to the filter screen 5.

[0042] Specifically, Figure 1 , Figure 2 and Figure 6 As shown, the detachable connection between the lower tank body 10 and the upper tank body 9 can be achieved by threaded connection, and by installing the filter screen plate 5 on the annular flange 11 near the tank mouth of the lower tank body 10, it is convenient to replace the filter screen plate 5, and the operation is convenient. Furthermore, since the top surface of the annular flange 11 is evenly and spaced along its circumference and a plurality of mounting holes 12 are provided, and an elastic member 6 is fixedly installed in each of the plurality of mounting holes 12, the filter screen plate 5 can be lifted at multiple points, thereby improving the rebound vibration effect and cleaning efficiency of the filter screen plate 5. It can be understood that by fixing the elastic member 6 in the mounting hole 12, it is possible to prevent the elastic member 6 from being displaced during compression or rebound, and the elastic member 6 plays a limiting role, thereby ensuring the stability of the filter screen plate 5 moving up and down.

[0043] In one embodiment, if Figures 1 to 3 As shown, the drive assembly includes a motor 13 and a transmission shaft 14, the motor 13 is vertically arranged on the tank cover, the output shaft of the motor 13 extends into the tank body and is detachably connected to the transmission shaft 14, the extension direction of the transmission shaft 14 is consistent with the extension direction of the output shaft of the motor 13, and the scraper rod 4 is detachably mounted on the transmission shaft 14. Specifically, when the motor 13 is running, the motor 13 synchronously drives the scraper rod 4 to rotate through the transmission shaft 14, so that the scraper rod 4 can push and scrape the cavity wall of the tank body to clean, and the structural design is simple and reasonable. In addition, the scraper rod 4 can be replaced or repaired by removing the tank cover, which is simple to operate and convenient to use.

[0044] In one embodiment, the scraper rod 4 includes two mutually perpendicular cross bars 15 and a vertical bar 16. The two cross bars 15 are spaced apart on the transmission shaft 14 and are detachably connected to the transmission shaft 14. The two ends of the two vertical bars 16 are respectively connected to the two ends of the two cross bars 15 in a one-to-one correspondence. The two vertical bars 16 are both used to abut against the cavity wall of the upper tank body 9, and the cross bar 15 away from the tank cover is used to abut against the filter screen plate 5.

[0045] Specifically, Figures 1 to 6As shown, the two cross bars 15 are arranged at intervals along the extension direction of the transmission shaft 14 and are detachably connected to the transmission shaft 14, so that the two ends of the two vertical bars 16 can be connected to the two ends of the two cross bars 15 in a one-to-one correspondence, and the structural design is simple and reasonable. Further, when the motor 13 drives the scraper 4 to rotate, the two vertical bars 16 in the scraper 4 abut against the cavity wall of the upper tank body 9, so that the two vertical bars 16 can push and scrape the particles attached and accumulated on the cavity wall of the tank body, and the two vertical bars 16 can achieve multi-point pushing and scraping, thereby improving the cleaning efficiency of the tank body cavity wall; at the same time, because the cross bar 15 in the scraper 4 away from the tank cover is used to abut against the filter screen 5, the filter screen 5 can be pushed and scraped for cleaning, and a brush can be installed on the cross bar 15, and the particles in the mesh of the filter screen 5 can be brushed by the brush, thereby further improving the cleaning effect of the filter screen 5. It is worth noting that the brush and its installation method are both mature existing technologies and will not be described in detail here, and the drawings in the specification do not show their specific composition structure.

[0046] In one embodiment, at least two inclined grooves 8 are provided on the filter screen plate 5, and any inclined groove 8 extends along the circumferential direction of the filter screen plate 5, and a first slope 17 is formed from top to bottom in any inclined groove 8, and a protrusion 7 is formed at a position corresponding to any inclined groove 8 on the cross bar 15 away from the tank cover, and any protrusion 7 has a guide slope along the circumferential direction of the filter screen plate 5. Figures 2 to 7 As shown, it can be understood that since at least two inclined grooves 8 are provided on the filter screen plate 5, and a protrusion 7 is formed at a position corresponding to any inclined groove 8 on the cross bar 15 away from the tank cover, when the motor 13 drives the scraper rod 4 to rotate, a plurality of protrusions 7 are respectively plugged into a plurality of inclined grooves 8 in sequence, thereby increasing the rebound vibration frequency of the filter screen plate 5 and greatly improving the vibration cleaning effect of the filter screen plate 5. Furthermore, since any protrusion 7 is provided with a guide slope along the circumferential direction of the filter screen plate 5, the guide slope can play a guiding role when the protrusion 7 moves, thereby improving the smoothness of the protrusion 7 when it extends into or out of the inclined groove 8.

[0047] In one embodiment, specifically, Figure 3 As shown, a second slope 18 is formed on one side of any horizontal bar 15 and vertical bar 16 along their respective extension directions, thereby reducing the contact area between the horizontal bar 15 and vertical bar 16 and the accumulated particles, improving the scraping and removing effect of the horizontal bar 15 and vertical bar 16 on the particles, and ensuring reliable use.

[0048] In one embodiment, a collecting cylinder 19 is detachably mounted on the discharge pipe 3, a window 20 is provided on the outer wall of the collecting cylinder 19, and a transparent baffle is provided at the window 20. Figure 1 and Figure 2As shown, the particles scraped off by the filter screen plate 5 can be collected by the collection barrel 19, which is convenient for subsequent centralized processing. Furthermore, the window 20 allows the staff to visually view the collection of particles in the collection barrel 19, which is convenient for replacing the collection barrel 19 and cleaning the particles in the collection barrel 19, and the window 20 can be shielded by a transparent baffle, which can be a transparent glass plate, thereby ensuring the sealing of the collection barrel 19 without affecting the staff's viewing, and the structural design is simple and reasonable.

[0049] In one embodiment, specifically, Figure 1 As shown, a support frame 21 is arranged on the outer wall of the tank body, and the support frame 21 includes a plurality of support legs evenly and spaced apart along the circumference of the tank body, so that the tank body can be supported at multiple points by the plurality of support legs, thereby improving the placement stability of the tank body.

[0050] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An exhaust gas purification device, used to communicate with the air inlet pipeline of an RTO regenerative thermal oxidizer and filter out particulate matter in the exhaust gas, comprising a tank body and a tank cover detachably connected to the tank body, wherein the tank body is provided with an air inlet pipe (1), an air outlet pipe (2) and an exhaust pipe (3), characterized in that: The invention also comprises a scraper rod (4), a filter screen plate (5) and an elastic member (6); the scraper rod (4) is rotatably mounted in the tank body through a driving assembly and is used to push and scrape the cavity wall of the tank body; the filter screen plate (5) is arranged in the tank body; the elastic member (6) is located below the filter screen plate (5) and is used to drive the filter screen plate (5) to abut against the scraper rod (4); a protrusion (7) is formed on the scraper rod (4), and an inclined groove (8) is provided on the filter screen plate (5) for the protrusion (7) to extend into.

2. The exhaust gas purification device according to claim 1, characterized in that: The tank body comprises an upper tank body (9) and a lower tank body (10), the lower tank body (10) being detachably connected to the upper tank body (9), an annular flange (11) for mounting the filter screen plate (5) being formed at a position near the tank mouth of the inner cavity of the lower tank body (10), a plurality of mounting holes (12) being formed on a side of the annular flange (11) facing the upper tank body (9), the plurality of mounting holes (12) being evenly and spacedly arranged along the circumference of the annular flange (11), an elastic member (6) being fixedly mounted in each of the plurality of mounting holes (12), an end of any of the elastic members (6) away from the annular flange (11) extending out of the mounting hole (12) and being connected to the filter screen plate (5).

3. The exhaust gas purification device according to claim 2, characterized in that: The driving assembly comprises a motor (13) and a transmission shaft (14); the motor (13) is vertically arranged on the tank cover; the output shaft of the motor (13) extends into the tank body and is detachably connected to the transmission shaft (14); the extension direction of the transmission shaft (14) is consistent with the extension direction of the output shaft of the motor (13); and the scraper rod (4) is detachably mounted on the transmission shaft (14).

4. The exhaust gas purification device according to claim 3, characterized in that: The scraper rod (4) comprises two mutually perpendicular cross bars (15) and a vertical bar (16); the two cross bars (15) are arranged on the transmission shaft (14) at intervals and are detachably connected to the transmission shaft (14); the two ends of the two vertical bars (16) are respectively connected to the two ends of the two cross bars (15) in a one-to-one correspondence; the two vertical bars (16) are used to abut against the cavity wall of the upper tank body (9); and the cross bar (15) away from the tank cover is used to abut against the filter screen plate (5).

5. The exhaust gas purification device according to claim 4, characterized in that: At least two inclined grooves (8) are provided on the filter screen plate (5), and any of the inclined grooves (8) extend along the circumferential direction of the filter screen plate (5). A first slope (17) is formed from top to bottom in any of the inclined grooves (8), and a protrusion (7) is formed at a position corresponding to any of the inclined grooves (8) on the cross bar (15) away from the tank cover, and any of the protrusions (7) is provided with a guide slope along the circumferential direction of the filter screen plate (5).

6. The exhaust gas purification device according to claim 5, characterized in that: A second slope (18) is formed on one side of any one of the horizontal rods (15) and the vertical rods (16) along their respective extension directions.

7. An exhaust gas purification device according to any one of claims 1 to 6, characterized in that: A collecting cylinder (19) is detachably mounted on the discharge pipe (3), a window (20) is provided on the outer wall of the collecting cylinder (19), and a transparent baffle is provided at the window (20).

8. An exhaust gas purification device according to any one of claims 1 to 6, characterized in that: A support frame (21) is arranged on the outer wall of the tank body, and the support frame (21) comprises a plurality of support legs which are evenly and spaced apart along the circumference of the tank body.

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