Catalytic combustion exhaust gas treatment device, system, and method

Abstract

A catalytic combustion waste gas treatment device includes a hollow tank and a filter screen. The tank has an air inlet on its bottom side wall and an exhaust outlet on its top wall. The filter screen is positioned between the air inlet and exhaust outlet, with its outer edge movably connected to and sealed to the inner wall of the tank. The filter screen divides the interior of the tank into an upper chamber and a lower chamber. A driving mechanism is provided between the filter screen and the tank to move the filter screen within the tank. This device addresses the problem in existing technologies where a large amount of solid particles adhere to the surface or crevices of the filter screen, clogging the filter pores and hindering the flow of waste gas, thus affecting the waste gas purification effect.

Description

Technical Field

[0001] This invention relates to the field of waste gas purification technology, specifically to a catalytic combustion waste gas treatment device, system, and method. Background Technology

[0002] Organic waste gas refers to waste gas containing volatile organic compounds generated in industrial production and daily life. These waste gases often contain harmful substances such as benzene, toluene, xylene, formaldehyde, and acetone, which not only have irritating odors but also harm the environment and human health.

[0003] In existing technologies, catalytic combustion is commonly used to purify and treat organic waste gas. Catalytic combustion is a highly efficient, energy-saving, and environmentally friendly technology for treating organic waste gas. It utilizes a catalyst to lower the activation energy of the reaction, allowing the organic waste gas to undergo flameless combustion at a relatively low temperature (usually 200–400°C), converting harmful substances into harmless carbon dioxide and water while releasing a large amount of heat energy. Finally, equipment such as filters remove solid particulate matter (such as dust) from the waste gas before it is discharged into the atmosphere.

[0004] However, with prolonged use, a large amount of solid particles adhere to the surface or gaps of the filter screen, clogging the filter pores and making it difficult for exhaust gas to pass through the filter screen, resulting in poor airflow and affecting the exhaust gas purification effect. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a catalytic combustion waste gas treatment device, system, and method to solve the problem in the prior art where a large number of solid particles adhere to the surface or gaps of the filter screen, causing blockage of the filter screen pores, making it difficult for waste gas to pass through the filter screen and resulting in poor flow and affecting the waste gas purification effect.

[0006] This invention is achieved through the following technical solution:

[0007] A catalytic combustion exhaust gas treatment device includes a hollow tank and a filter screen. The bottom side wall of the tank has an air inlet and the top wall has an exhaust outlet. The filter screen is disposed between the air inlet and the exhaust outlet. The outer edge of the filter screen is movably connected to the inner wall of the tank and is sealed. The filter screen divides the interior of the tank into an upper chamber and a lower chamber.

[0008] A drive unit is provided between the filter screen and the tank body to drive the filter screen to move within the tank body.

[0009] Furthermore, the drive unit includes a pressure relief pipe with a hollow structure and an open end. The open end of the pressure relief pipe passes through the exhaust hole and is connected to the middle of the filter screen. The pressure relief pipe and the exhaust hole are slidably and sealingly fitted.

[0010] The pressure relief pipe has a vent hole on its side wall that connects the inside and outside of the pipe, and the vent hole can move with the pressure relief pipe to the outside of the tank.

[0011] Furthermore, an elastic support member is provided below the filter screen to support the filter screen. One end of the elastic support member abuts against the bottom wall of the tank, and the other end abuts against the lower plane of the filter screen.

[0012] The pressure relief pipe has a protrusion at one end facing away from the opening. When the protrusion abuts against the top wall of the tank, the opening end of the pressure relief pipe abuts against the filter screen and the elastic support is squeezed and contracted. When the vent moves outside the tank, the pressure relief pipe and the filter screen are no longer in contact.

[0013] Furthermore, a cleaning strip is provided on the lower plane of the filter screen. One end of the cleaning strip is rotatably connected to the middle of the filter screen about the axis of the filter screen, and the other end extends radially toward the filter screen. The upper surface of the cleaning strip is in contact with the lower plane of the filter screen.

[0014] A linkage component is provided between the cleaning strip and the pressure relief pipe. When the pressure relief pipe slides in the exhaust hole, it drives the cleaning strip to rotate on the filter screen through the linkage component.

[0015] Furthermore, the linkage component includes a rotating rod disposed inside the tank and coaxial with the tank body. One end of the rotating rod is inserted into the bottom wall of the tank body and rotates to engage with it, while the other end passes through the filter screen and extends into the opening of the pressure relief pipe. There is a gap between the outer surface of the rotating rod and the inner wall of the pressure relief pipe.

[0016] One end of the cleaning strip is slidably connected to the rotating rod along the axial direction of the rotating rod with a single degree of freedom;

[0017] The rotating rod has a groove on its outer surface facing the pressure relief pipe, which extends spirally toward the axis of the rotating rod. A slider is slidably fitted in the groove, and one end of the slider protrudes out of the groove and is fixedly connected to the opening end of the pressure relief pipe.

[0018] Furthermore, the middle part of the rotating rod is prismatic, and a sliding sleeve is fitted over the middle part of the rotating rod, and the sliding sleeve and the rotating rod slide in a sliding fit along the axial direction of the rotating rod;

[0019] One end of the sliding sleeve is inserted into the filter screen and rotates to engage, while one end of the cleaning strip is fixedly connected to the outer circular surface of the sliding sleeve.

[0020] A catalytic combustion exhaust gas treatment system includes the catalytic combustion exhaust gas treatment device described above, and further includes a collection bottle for collecting solid particles in the lower chamber of a tank. The collection bottle is disposed outside the tank, and the bottom of the collection bottle is connected to the lower chamber of the tank through a pipe.

[0021] A shut-off valve for controlling the opening and closing of the pipeline is installed on the pipeline between the collection bottle and the tank.

[0022] The top side wall of the collection bottle has a first through hole connecting the inside and outside of the collection bottle.

[0023] Furthermore, it also includes an air pump for inputting exhaust gas into the tank, wherein the air outlet of the air pump is connected and communicates with the air inlet.

[0024] The air inlet of the air pump is connected to the top of the collection bottle.

[0025] Furthermore, a dust collection hole is provided on the bottom of the outer circular surface of the tank at a position opposite to the air inlet. One end of the shut-off valve is fixedly connected to and communicates with the dust collection hole on one end of the tank exterior, and the other end is connected to the bottom of the collection bottle.

[0026] A method for treating catalytic combustion waste gas includes using the catalytic combustion waste gas treatment system described above, with the following treatment steps:

[0027] S1. Preparation: Close the shut-off valve, inject solvent into the collection bottle, and ensure that the solvent level is lower than the height of the first through hole. Connect the external waste gas pipeline to the first through hole, and start the vacuum pump to draw the waste gas in the collection bottle into the lower chamber of the tank. The collection bottle will be under negative pressure.

[0028] S2. Filtering solid particles: By using the pressure relief pipe to block the exhaust hole, exhaust gas is continuously input into the tank, making the inside of the tank a high-pressure state. Some of the exhaust gas passes through the filter screen and enters the upper chamber, filtering out solid particles. Until the gas in the upper chamber pushes the pressure relief pipe to slide upward in the exhaust hole, the filtered exhaust gas in the upper chamber is discharged when the vent moves to the outside of the tank.

[0029] S3. Separation of solid particles: The filter screen moves along with the pressure relief pipe. The collision between the filter screen and the inner wall of the tank causes the filter screen to vibrate slightly, shaking and separating the solid particles adhering to the filter screen, which then fall into the lower chamber, reducing the probability of the filter screen pores being blocked.

[0030] S4. Collecting solid particles: Block the external pipeline for transporting waste gas, open the shut-off valve, and connect the lower chamber of the tank with the bottom of the collection bottle. Under the pressure difference between the inside of the tank and the inside of the collection pipe, the solid particles in the lower chamber enter the bottom of the collection bottle along with the waste gas. The solid particles are absorbed and removed by the solvent. The waste gas moves upward to the top of the collection bottle and re-enters the tank under the action of the air pump, so that the waste gas circulates between the inside of the tank and the inside of the collection bottle.

[0031] The beneficial effects of this invention are as follows:

[0032] This catalytic combustion waste gas treatment device connects a filter screen to a tank. During the movement of the filter screen within the tank, the friction and collision between the filter screen and the tank cause the filter screen to vibrate, shaking and separating solid particles adhering to the filter screen. This reduces the probability of the filter screen pores becoming clogged, allowing the waste gas to pass smoothly through the filter screen.

[0033] This catalytic combustion waste gas treatment system and method collects solid particulate matter in the lower chamber of a tank using a collection bottle. Utilizing the pressure difference between the inside of the tank and the inside of the collection bottle, the waste gas in the lower chamber of the tank carries the solid particulate matter into a collection pipe. The solid particulate matter is then absorbed and removed by a solvent, reducing the content of solid particulate matter in the lower chamber of the tank and further reducing the probability of the filter screen becoming clogged.

[0034] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0036] Figure 2 This is an exploded view of the tank in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the planar structure of the tank in an embodiment of the present invention;

[0038] Figure 4 This is a three-dimensional structural diagram of the filter plate in an embodiment of the present invention;

[0039] Figure 5 This is a three-dimensional structural diagram of the pressure relief pipe in an embodiment of the present invention;

[0040] Figure 6 This is a three-dimensional structural diagram of the rotating rod in an embodiment of the present invention;

[0041] Figure 7 This is a three-dimensional structural diagram of the cleaning strip in an embodiment of the present invention;

[0042] Figure 8 for Figure 2 Enlarged view of point A in the middle;

[0043] Figure 9 for Figure 3 Sectional view of BB (State 1);

[0044] Figure 10 for Figure 9 Enlarged view of point C in the middle;

[0045] Figure 11 for Figure 9 Enlarged view of point D in the middle;

[0046] Figure 12 for Figure 3 Sectional view of BB (State 2).

[0047] In the diagram: 1. Tank body; 11. Exhaust port; 12. Air inlet; 13. Dust collection port; 14. Strip groove; 141. Groove; 2. Filter screen; 21. Protrusion; 3. Pressure relief pipe; 31. Vent; 4. Compression spring; 5. Cleaning bar; 6. Rotating rod; 61. Slide groove; 62. Sliding block; 63. Sliding sleeve; 7. Collection bottle; 71. First through hole; 8. Shut-off valve; 9. Air pump. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0050] 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, it does not need to be further defined or explained in subsequent drawings.

[0051] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0053] Please see Figure 1-12 The present invention provides a technical solution: a catalytic combustion waste gas treatment device, comprising a hollow tank 1 and a filter screen 2. The bottom side wall of the tank 1 is provided with an air inlet 12 and the top wall is provided with an exhaust 11. The filter screen 2 is disposed between the air inlet 12 and the exhaust 11. The outer edge of the filter screen 2 is movably connected to the inner wall of the tank 1 and is sealed. The filter screen 2 divides the interior of the tank 1 into an upper chamber and a lower chamber.

[0054] A drive unit is provided between the filter screen 2 and the tank 1 to drive the filter screen 2 to move within the tank 1.

[0055] In this solution, by movably connecting the filter screen 2 to the tank 1, the filter screen 2 vibrates due to the friction and collision between the filter screen 2 and the tank 1 during the movement of the filter screen 2 inside the tank 1. This shakes and separates the solid particles adhering to the filter screen 2, reducing the probability of the filter screen 2 becoming clogged, and allowing the exhaust gas to pass smoothly through the filter screen 2.

[0056] The inner circular surface of the tank body 1 has a strip-shaped groove 14 extending axially towards the tank body 1. A protrusion 21, adapted to the strip-shaped groove 14, is fixedly connected to the outer circular surface of the filter screen 2. The protrusion 21 is embedded into the strip-shaped groove 14, with its two sides respectively abutting against the two side walls of the strip-shaped groove 14, thus restricting the filter screen 2 from rotating around the axis of the tank body 1 within the tank body 1. Figure 9 , 11 As shown. Furthermore, the outer circular surface of the filter screen 2 is in contact with the inner circular surface of the tank body 1, allowing the filter screen 2 to move only within the tank body 1 along its axial direction. The bottom of the strip groove 14 is higher than the height of the air inlet 12, ensuring that the air inlet 12 is always located within the lower cavity of the tank body 1.

[0057] Furthermore, the protrusion 21 has a structure that gradually tapers from the end facing the filter screen 2 to the end facing away from the filter screen 2, making the end of the protrusion 21 facing away from the filter screen 2 a pointed tip. Several grooves 141, which are adapted to the tip of the protrusion 21, are formed on a plane of the strip groove 14 facing away from the axis of the tank body 1. These grooves 141 are evenly distributed along the length of the strip groove 14, and are joined together to form a serrated shape. The protrusion 21 can be made of materials such as stainless steel, which has a certain degree of toughness, allowing the tip of the protrusion 21 to bend appropriately and slide over the grooves 141.

[0058] In use, the external exhaust gas pipeline is connected to the air inlet 12 and secured with clamps or other equipment, so that the exhaust port 11 serves as the channel for the gas to flow out of the tank 1; then exhaust gas is injected into the lower chamber of the tank 1, and the exhaust gas passes through the filter screen 2 into the upper chamber of the tank 1 and is finally discharged from the exhaust port 11; the filter screen 2 filters and captures solid particles in the exhaust gas, so that the solid particles are retained in the lower chamber of the tank 1 or adhere to the surface of the filter screen 2, thereby filtering and purifying the exhaust gas.

[0059] When the exhaust volume in the exhaust port 11 decreases, it is necessary to clean the filter screen 2. The external exhaust gas delivery pipe can be closed to stop the input of exhaust gas into the tank 1. The filter plate is driven by the drive unit to slide in the tank 1, so that the protrusion 21 abuts against the inclined surface of the groove 141 and is bent by force until it slides through the groove 141 and enters the next groove 141. When the tip of the protrusion 21 disengages from the inclined surface of the groove 141, it releases energy and swings, thereby causing the filter screen 2 to vibrate. By the protrusion 21 continuously sliding through multiple grooves 141, the filter screen 2 is continuously vibrated, shaking and separating the solid particles adhering to the filter screen 2 and letting them fall into the lower chamber, reducing the probability of the filter screen 2 being blocked.

[0060] In this embodiment: the driving unit includes a pressure relief pipe 3 with a hollow structure and an open end. The open end of the pressure relief pipe 3 passes through the exhaust hole 11 and is connected to the middle of the filter screen 2. The pressure relief pipe 3 and the exhaust hole 11 are slidably and sealingly fitted.

[0061] The pressure relief pipe 3 has a vent 31 on its side wall that connects the inside and outside of the pressure relief pipe 3, and the vent 31 can move with the pressure relief pipe 3 to the outside of the tank body 1.

[0062] In this design, the vent 31 serves as the only channel for the exhaust gas to flow out of the upper chamber of the tank 1. The pressure relief pipe 3 can exhibit two states when sliding within the exhaust port 11:

[0063] State 1, such as Figure 9 As shown, the vent 31 is located in the upper chamber of the tank 1, blocking the exhaust gas outflow channel in the upper chamber of the tank 1. By continuously injecting exhaust gas into the lower chamber of the tank 1, the internal pressure of the tank 1 can be increased.

[0064] State 2, such as Figure 12 As shown, the vent 31 is located outside the tank 1 and is connected to the exhaust gas outlet channel in the upper chamber of the tank 1, which can discharge the exhaust gas in the upper chamber of the tank 1.

[0065] The pressure relief pipe 3 can be fixedly connected to the filter screen 2, allowing the filter screen 2 to move axially along the tank body 1 along with the pressure relief pipe 3, thereby causing the solid particles adhering to the filter screen 2 to be shaken and separated. That is, as the pressure difference between the inside and outside of the tank body 1 gradually increases, the pressure relief pipe 3 can automatically slide upward within the vent 11, increasing the overall volume of the inside of the tank body 1 and the pressure relief pipe 3, automatically shaking and separating the solid particles adhering to the filter screen 2. If necessary, the pressure relief pipe 3 can be manually pushed up and down to clean the filter screen 2.

[0066] In this embodiment: an elastic support member is provided below the filter screen 2 for supporting the filter screen 2. One end of the elastic support member abuts against the bottom wall of the tank 1, and the other end abuts against the lower plane of the filter screen 2.

[0067] The pressure relief pipe 3 has a protrusion at one end facing away from the opening. When the protrusion abuts against the top wall of the tank 1, the opening end of the pressure relief pipe 3 abuts against the filter screen 2 and the elastic support is squeezed and contracted. When the vent 31 moves outside the tank 1, the pressure relief pipe 3 and the filter screen 2 are no longer in contact.

[0068] In this design, the elastic support is a compression spring 4, whose axis is parallel to the axis of the tank body 1. The compression spring 4 provides elastic support for the filter screen 2. The protruding part at one end of the pressure relief pipe 3 has a larger outer dimension than the vent hole 11, which prevents the pressure relief pipe 3 from completely passing through the vent hole 11 and falling into the tank body 1.

[0069] Additionally, when pressure relief pipe 3 is in state one (e.g.) Figure 9 As shown, the protrusion abuts against the outer top surface of the tank 1, the bottom end of the pressure relief pipe 3 abuts against the middle of the filter screen 2, and the compression spring 4 is squeezed and contracted. That is, the elastic force corresponding to the deformation of the compression spring 4 is less than or equal to the weight of the pressure relief pipe 3 and the filter screen 2 as a whole. When the pressure difference between the inside and outside of the tank 1 is small or equal, the vent 31 is always located inside the tank 1.

[0070] In use, the pressure relief pipe 3 is initially in state one, continuously injecting waste gas into the tank 1, increasing the pressure difference between the inside and outside of the tank 1. The waste gas in the tank 1 exerts upward pressure on the pressure relief pipe 3, reducing the pressure exerted by the pressure relief pipe 3 on the filter screen 2 and compression spring 4, causing the compression spring 4 to freely extend and release energy, pushing the filter screen 2 and pressure relief pipe 3 upward. When the thrust exerted by the waste gas on the pressure relief pipe 3 is greater than the weight of the pressure relief pipe 3, the pressure relief pipe 3 disengages from the filter screen 2 and continues to move upward, allowing the upper chamber of the tank 1 to have the necessary space, until the vent 31 moves out of the tank 1, entering state two (as shown). Figure 12 As shown), exhaust gas is discharged from tank 1.

[0071] In this embodiment: a cleaning strip 5 is provided on the lower plane of the filter screen 2. One end of the cleaning strip 5 is rotatably connected to the middle part of the filter screen 2 with the axis of the filter screen 2 as the center, and the other end extends radially toward the filter screen 2. The upper surface of the cleaning strip 5 is in contact with the lower plane of the filter screen 2.

[0072] A linkage component is provided between the cleaning strip 5 and the pressure relief pipe 3. When the pressure relief pipe 3 slides in the exhaust hole 11, it drives the cleaning strip 5 to rotate on the filter screen 2 through the linkage component.

[0073] In this plan, such as Figure 4 As shown, a brush or silicone strip can be installed on the upper surface of the cleaning strip 5, and the brush or silicone strip contacts the lower surface of the filter screen 2. The cleaning strip 5 can be made of a rigid material (metal, plastic, etc.) to support the brush or silicone strip. The middle part of the filter screen 2 is made of a rigid material. By rotating one end of the cleaning strip 5 to the middle part of the filter screen 2, the cleaning strip 5 can move relative to the filter screen 2, which can scrape and clean the lower surface of the filter screen 2, further separating the solid particles adhering to the filter screen 2.

[0074] In this embodiment: the linkage component includes a rotating rod 6 disposed inside the tank 1 and coaxial with the tank 1. One end of the rotating rod 6 is inserted into the bottom wall of the tank 1 and rotates to engage, and the other end passes through the filter screen 2 and extends into the opening of the pressure relief pipe 3. There is a gap between the outer circular surface of the rotating rod 6 and the inner wall of the pressure relief pipe 3.

[0075] One end of the cleaning strip 5 is slidably connected to the rotating rod 6 along the axial direction of the rotating rod 6 with a single degree of freedom;

[0076] The rotating rod 6 has a groove 61 that extends spirally toward the axial direction of the rotating rod 6 on the outer circular surface of one end facing the pressure relief pipe 3. A slider 62 is slidably fitted in the groove 61, and one end of the slider 62 protrudes out of the groove 61 and is fixedly connected to the open end of the pressure relief pipe 3.

[0077] In this scheme, the diameter of the rotating rod 6 is smaller than the opening diameter of the pressure relief pipe 3. After one end of the rotating rod 6 is inserted into the opening of the pressure relief pipe 3, the exhaust gas in the upper chamber of the tank 1 can flow normally into the pressure relief pipe 3 and finally be discharged from the vent 31 to the outside of the tank 1.

[0078] The diameter of the section of the rotating rod 6 inserted into the bottom wall of the tank 1 is larger than the diameter of the middle part of the rotating rod 6, which restricts the axial movement of the rotating rod 6, so that the rotating rod 6 can only rotate inside the tank 1. Figure 6 As shown. The middle part of the pressure relief pipe 3 is prismatic, and the vent 11 is adapted to the middle part of the pressure relief pipe 3, so that the pressure relief pipe 3 can only move along the axial direction of the tank body 1, as shown. Figure 5 As shown. Therefore, when the pressure relief pipe 3 drives the slider 62 to move axially along the tank body 1, the slider 62 slides in the slide groove 61, which can give a thrust to the side wall of the slide groove 61, causing the rotating rod 6 to rotate.

[0079] Additionally, one end of the cleaning strip 5 slides along the axis of the rotating rod 6 (the axis of the tank 1) with a single degree of freedom, and the cleaning strip 5 can rotate together with the rotating rod 6.

[0080] Furthermore, the cleaning strip 5 is rotatably connected to the filter screen 2, allowing the cleaning strip 5 and the filter screen 2 to move together as a whole within the tank 1 along the axial direction of the tank 1, so that the upper surface of the cleaning strip 5 remains in contact with the lower surface of the filter screen 2, such as... Figure 4 As shown. Furthermore, the filter screen 2 can only move along the axial direction of the tank body 1, allowing the cleaning strip 5 to rotate relative to the filter screen 2.

[0081] Therefore, when the filter screen 2 remains in the same position within the tank 1, the movement of the pressure relief pipe 3 drives the rotating rod 6 to rotate via the slider 62 and the sliding groove 61, causing the cleaning strip 5 to rotate on the filter screen 2 for cleaning. When the pressure relief pipe 3 moves, causing the filter screen 2 to move within the tank 1, the cleaning strip 5 rotates on the filter screen 2 for cleaning, while simultaneously the filter screen 2 slides within the strip groove 14, and the cleaning strip 5 slides on the rotating rod 6.

[0082] In this embodiment: the middle part of the rotating rod 6 is prismatic, and a sliding sleeve 63 is provided on the middle part of the rotating rod 6, and the sliding sleeve 63 and the rotating rod 6 slide in a sliding fit along the axial direction of the rotating rod 6;

[0083] One end of the sliding sleeve 63 is inserted into the filter screen 2 and rotates to engage with it, while one end of the cleaning strip 5 is fixedly connected to the outer circular surface of the sliding sleeve 63.

[0084] In this solution: by setting the middle part of the rotating rod 6 into a prism shape and matching the inner hole of the sliding sleeve 63, the sliding sleeve 63 can only slide along the axial direction of the rotating rod 6, and the cleaning strip 5 is fixedly connected to the sliding sleeve 63, so that the cleaning strip 5 can rotate together with the rotating rod 6.

[0085] Furthermore, an annular groove is provided in the middle of the filter screen 2, and a convex ring adapted to the annular groove is provided on one end face of the sliding sleeve 63. By inserting the convex ring into the annular groove and rotating it, the sliding sleeve 63 is restricted from moving along the axial direction of the filter screen 2 on the filter screen 2, and can only rotate relative to the filter screen 2.

[0086] A catalytic combustion exhaust gas treatment system includes the catalytic combustion exhaust gas treatment device described above, and further includes a collection bottle 7 for collecting solid particles in the lower chamber of a tank 1. The collection bottle 7 is disposed outside the tank 1, and the bottom of the collection bottle 7 is connected to the lower chamber of the tank 1 through a pipe.

[0087] A shut-off valve 8 is installed on the pipeline between the collection bottle 7 and the tank 1 to control the opening and closing of the pipeline;

[0088] The top side wall of the collection bottle 7 has a first through hole 71 that connects the inner and outer sides of the collection bottle 7.

[0089] In this design, the collection bottle 7 is used to store solvents (water, acid or alkaline solutions, etc.) that can dissolve and absorb solid particles. An air inlet connector is located at the bottom of the side wall of the collection bottle 7. This connector is connected to one end of the shut-off valve 8, allowing gas flowing from the lower chamber of the tank 1 to enter the bottom of the collection bottle 7 and mix thoroughly with the solvent, facilitating the dissolution and absorption of solid particles in the waste gas.

[0090] Because solvents exposed to air for extended periods can evaporate, deteriorate, or react with substances in the air, they are susceptible to degradation. For example, some acidic solvents (such as carbonate solutions) may react with carbon dioxide in the air to form carbonates or other compounds, thereby altering the solvent's composition and properties. Therefore, it is difficult to use solvents for prolonged filtration and purification.

[0091] During use, when it is necessary to collect solid particles from the lower chamber of tank 1, the inside of tank 1 is under high pressure. A solvent is injected into the collection bottle 7 through the first through-hole 71, and the first through-hole 71 is kept open. The inside of the collection tube is under normal pressure. The shut-off valve 8 is opened, connecting the lower chamber of tank 1 and the inside of the collection bottle 7. Under the pressure difference between the inside of tank 1 and the inside of collection bottle 7, an airflow is formed from the lower chamber of tank 1 to the bottom of collection bottle 7. Solid particles from the lower chamber of tank 1 enter the collection bottle 7 along with the airflow. After being dissolved and absorbed by the solvent, the exhaust gas moves upward and is finally discharged from the first through-hole 71. Collecting solid particles from the lower chamber of tank 1 through the collection bottle 7 reduces the probability of the filter screen 2 becoming clogged. Simultaneously, clean air can be injected through the air inlet 12 to fully carry out the solid particles from the lower chamber of tank 1, cleaning tank 1.

[0092] In this embodiment, a vacuum pump 9 for inputting waste gas into the tank 1 is also included. The outlet end of the vacuum pump 9 is connected to and communicates with the air inlet 12.

[0093] The air inlet of the air pump 9 is connected to the top of the collection bottle 7.

[0094] In this plan, such as Figure 1 As shown, a gas outlet connector is provided on the top side wall of the collection bottle 7, which is connected to the air inlet of the vacuum pump 9. The vacuum pump 9 is used to draw gas from the collection bottle 7 into the lower chamber of the tank 1. When the first through hole 71 on the collection bottle 7 is closed and the vent 31 is located inside the tank 1, the interior of the tank 1 and the interior of the collection bottle 7 are completely sealed, and the air inside the tank 1 and the air inside the collection bottle 7 can be circulated by the vacuum pump 9.

[0095] The air pump can be selected as Qingdao Maihe FY-1H-N.

[0096] When using filter screen 2 to filter solid particles in exhaust gas, close shut-off valve 8, connect and connect the external exhaust gas pipeline to the first through hole 71, start vacuum pump 9, and use vacuum pump 9 to draw the exhaust gas entering the collection bottle 7 into the lower chamber of tank 1, increasing the internal pressure of tank 1, and filter screen 2 to filter solid particles.

[0097] When cleaning the inside of tank 1 is required, remove the external exhaust gas delivery pipe and inject solvent into collection bottle 7 through the first through hole 71, ensuring the liquid level is below the height of the exhaust connector. Then, seal the first through hole 71. Manually press the pressure relief pipe 3 up and down to vibrate or scrape away the solid particles adhering to the filter screen 2. The solid particles fall into the lower chamber of tank 1. Start the vacuum pump 9 to draw the exhaust gas from collection bottle 7 into tank 1, creating a negative pressure inside collection bottle 7. Open the shut-off valve 8 to allow the exhaust gas inside tank 1 and collection bottle 7 to circulate. The airflow thoroughly carries away the solid particles inside tank 1, which are then dissolved and absorbed by the solvent and collected in collection bottle 7.

[0098] In this embodiment: a dust collection hole 13 is provided at the bottom of the outer circular surface of the tank body 1 at the position opposite to the air inlet hole 12. One end of the shut-off valve 8 is fixedly connected to and communicates with the dust collection hole 13 at one end of the outer surface of the tank body 1, and the other end is connected to the bottom of the collection bottle 7.

[0099] In this design, the dust collection hole 13 and the air inlet 12 are arranged opposite to each other so that the air inside the tank 1 can form an airflow that flows in the same direction, so as to remove solid particles from the lower chamber of the tank 1.

[0100] A method for treating catalytic combustion waste gas includes using the catalytic combustion waste gas treatment system described above, with the following treatment steps:

[0101] S1. Preparation: Close the shut-off valve 8, inject solvent into the collection bottle 7, and make sure the solvent level is lower than the height of the first through hole 71. Connect the external waste gas pipeline to the first through hole 71, and start the vacuum pump 9 to draw the waste gas in the collection bottle 7 into the lower chamber of the tank 1. The collection bottle 7 is under negative pressure.

[0102] S2. Filtering solid particles: By using the pressure relief pipe 3 to block the exhaust hole 11, exhaust gas is continuously input into the tank 1, making the inside of the tank 1 a high-pressure state. Some of the exhaust gas passes through the filter screen 2 and enters the upper chamber, filtering out solid particles. Until the gas in the upper chamber pushes the pressure relief pipe 3 to slide upward in the exhaust hole 11, the filtered exhaust gas in the upper chamber is discharged when the vent 31 moves to the outside of the tank 1.

[0103] S3. Separating solid particles: The filter screen 2 moves together with the pressure relief pipe 3. The filter screen 2 is made to vibrate slightly by colliding with the inner wall of the tank 1. The solid particles adhering to the filter screen 2 are shaken and separated and fall into the lower chamber, reducing the probability of the filter screen 2 being blocked.

[0104] S4. Collecting solid particles: Block the external pipeline for transporting waste gas, open the shut-off valve 8, and connect the lower chamber of tank 1 with the bottom of collection bottle 7. Under the pressure difference between the inside of tank 1 and the inside of the collection pipe, the solid particles in the lower chamber enter the bottom of collection bottle 7 along with the waste gas. The solid particles are absorbed and removed by the solvent. The waste gas moves upward to the top of collection bottle 7 and re-enters tank 1 under the action of the air pump, so that the waste gas circulates between the inside of tank 1 and the inside of collection bottle 7.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A catalytic combustion waste gas treatment device, comprising a hollow tank (1) and a filter screen (2), wherein the bottom side wall of the tank (1) is provided with an air inlet (12) and the top wall is provided with an exhaust outlet (11), and the filter screen (2) is disposed between the air inlet (12) and the exhaust outlet (11), characterized in that: The outer edge of the filter screen (2) is movably connected to the inner wall of the tank (1) and is sealed together. The filter screen (2) divides the inside of the tank (1) into an upper chamber and a lower chamber. A drive unit is provided between the filter screen (2) and the tank (1) for driving the filter screen (2) to move within the tank (1); The drive unit includes a pressure relief pipe (3) with a hollow structure and an open end. The open end of the pressure relief pipe (3) passes through the exhaust hole (11) and is connected to the middle of the filter screen (2). The pressure relief pipe (3) and the exhaust hole (11) are slidably and sealingly fitted. The pressure relief pipe (3) has a vent hole (31) on its side wall that connects the inside and outside of the pressure relief pipe (3), and the vent hole (31) can move with the pressure relief pipe (3) to the outside of the tank (1). A cleaning strip (5) is provided on the lower plane of the filter screen (2). One end of the cleaning strip (5) is rotatably connected to the middle part of the filter screen (2) with the axis of the filter screen (2) as the center, and the other end extends radially toward the filter screen (2). The upper surface of the cleaning strip (5) is in contact with the lower plane of the filter screen (2). A linkage component is provided between the cleaning strip (5) and the pressure relief pipe (3). When the pressure relief pipe (3) slides in the exhaust hole (11), the linkage component drives the cleaning strip (5) to rotate on the filter screen (2). The linkage component includes a rotating rod (6) that is coaxial with the tank (1) inside the tank body (1). One end of the rotating rod (6) is inserted into the bottom wall of the tank body (1) and rotates to engage with it. The other end passes through the filter screen (2) and extends into the opening of the pressure relief pipe (3). There is a gap between the outer surface of the rotating rod (6) and the inner wall of the pressure relief pipe (3). One end of the cleaning strip (5) is slidably connected to the rotating rod (6) along the axial direction of the rotating rod (6) with a single degree of freedom; The rotating rod (6) has a groove (61) that spirally extends toward the axial direction of the rotating rod (6) on the outer circular surface of one end facing the pressure relief pipe (3). A slider (62) is slidably fitted in the groove (61), and one end of the slider (62) protrudes out of the groove (61) and is fixedly connected to the open end of the pressure relief pipe (3). The rotating rod (6) is prismatic in the middle, and a sliding sleeve (63) is provided on the middle of the rotating rod (6), and the sliding sleeve (63) and the rotating rod (6) slide in a sliding fit along the axial direction of the rotating rod (6); One end of the sliding sleeve (63) is inserted into the filter screen (2) and rotates to engage, while one end of the cleaning strip (5) is fixedly connected to the outer surface of the sliding sleeve (63).

2. The catalytic combustion waste gas treatment device according to claim 1, characterized in that: Below the filter screen (2), there is an elastic support member for supporting the filter screen (2). One end of the elastic support member abuts against the bottom wall of the tank (1), and the other end abuts against the lower plane of the filter screen (2). The pressure relief pipe (3) has a protrusion at one end facing away from the opening. When the protrusion abuts against the top wall of the tank (1), the opening end of the pressure relief pipe (3) abuts against the filter screen (2) and the elastic support is squeezed and contracted. When the vent (31) moves outside the tank (1), the pressure relief pipe (3) and the filter screen (2) are no longer in contact.

3. A catalytic combustion waste gas treatment system, comprising the catalytic combustion waste gas treatment device as described in claim 1 or 2, characterized in that: It also includes a collection bottle (7) for collecting solid particles in the lower chamber of the tank (1), the collection bottle (7) being disposed outside the tank (1), and the bottom of the collection bottle (7) being connected to the lower chamber of the tank (1) via a pipe; A shut-off valve (8) for controlling the opening and closing of the pipeline is installed on the pipeline between the collection bottle (7) and the tank (1); The top side wall of the collection bottle (7) is provided with a first through hole (71) connecting the inside and outside of the collection bottle (7).

4. The catalytic combustion waste gas treatment system according to claim 3, characterized in that: It also includes a vacuum pump (9) for inputting exhaust gas into the tank (1), wherein the outlet end of the vacuum pump (9) is connected to and communicates with the air inlet (12); The air inlet of the air pump (9) is connected to the top of the collection bottle (7).

5. The catalytic combustion waste gas treatment system according to claim 4, characterized in that: The bottom of the outer circular surface of the tank (1) is provided with a dust collection hole (13) at the position opposite to the air inlet (12). One end of the shut-off valve (8) is fixedly connected to the dust collection hole (13) at one end of the tank (1) and communicates with it. The other end is connected to the bottom of the collection bottle (7).

6. A method for treating catalytic combustion waste gas, comprising using the catalytic combustion waste gas treatment system of claim 5, characterized in that: The processing steps are as follows: S1. Preparation: Close the shut-off valve (8), inject solvent into the collection bottle (7), and the solvent level is lower than the height of the first through hole (71). Connect the external waste gas pipeline to the first through hole (71), start the vacuum pump (9) to draw the waste gas in the collection bottle (7) into the lower chamber of the tank (1), and the collection bottle (7) is under negative pressure. S2. Filtering solid particles: By using the pressure relief pipe (3) to block the exhaust hole (11), waste gas is continuously input into the tank (1), so that the inside of the tank (1) is in a high-pressure state. Some of the waste gas passes through the filter screen (2) and enters the upper chamber, filtering out solid particles. Until the gas in the upper chamber pushes the pressure relief pipe (3) to slide upward in the exhaust hole (11), the filtered waste gas in the upper chamber is discharged when the vent (31) moves to the outside of the tank (1). S3. Separating solid particles: The filter screen (2) moves together with the pressure relief pipe (3). The friction between the outer surface of the filter screen (2) and the inner wall of the tank (1) causes the filter screen (2) to vibrate slightly, shaking and separating the solid particles adhering to the filter screen (2) and letting them fall into the lower chamber, reducing the probability of the filter holes on the filter screen (2) being blocked. S4. Collect solid particles: Block the external pipeline for transporting waste gas, open the shut-off valve (8), connect the lower chamber of the tank (1) with the bottom of the collection bottle (7), and under the pressure difference between the inside of the tank (1) and the inside of the collection pipe, the solid particles in the lower chamber enter the bottom of the collection bottle (7) along with the waste gas. The solid particles are absorbed and removed by the solvent, and the waste gas moves upward to the top of the collection bottle (7). Under the action of the air pump, it re-enters the tank (1), so that the waste gas circulates between the inside of the tank (1) and the inside of the collection bottle (7).

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