Catalytic combustion waste gas treatment device, system and method

Abstract

A catalytic combustion waste gas treatment device comprises a tank body of a hollow structure and a filter screen, a gas inlet hole is formed in the side wall of the bottom of the tank body, a gas outlet hole is formed in the top wall of the tank body, the filter screen is arranged between the gas inlet hole and the gas outlet hole, and the outer edge of the filter screen is movably connected with the inner wall of the tank body in a sealing fit mode. The interior of the tank body is divided into an upper chamber and a lower chamber through the filter screen; a driving part for driving the filter screen to move in the tank body is arranged between the filter screen and the tank body. The problems that in the prior art, a large number of solid particles adhere to the surface of a filter screen or in gaps, filter holes of the filter screen are blocked, waste gas difficultly penetrates through the filter screen, circulation is not smooth, and the waste gas purification effect is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification, and in particular to a catalytic combustion waste gas treatment device, system and method. Background Art

[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, acetone, etc., which not only have pungent odors, but also cause harm to the environment and human health.

[0003] In the prior art, catalytic combustion is usually used to purify and treat organic waste gas. Catalytic combustion is an efficient, energy-saving and environmentally friendly organic waste gas treatment technology. It uses catalysts to reduce the activation energy of the reaction, so that the organic waste gas can be flamelessly burned 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, a filter screen and other equipment are used to filter out solid particles (such as dust, etc.) in the waste gas until the waste gas is discharged into the atmosphere.

[0004] However, when used for a long time, a large amount of solid particles adhere to the surface of the filter or in the gaps, causing clogging of the filter holes, making it difficult for the exhaust gas to pass through the filter, resulting in poor circulation 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 exhaust gas treatment device, system and method to solve the problem in the prior art that a large amount of solid particulate matter adheres to the surface or gaps of the filter screen, causing blockage of the filter screen holes, making it difficult for the exhaust gas to pass through the filter screen, resulting in poor circulation and affecting the exhaust gas purification effect.

[0006] The present invention is achieved through the following technical solutions:

[0007] A catalytic combustion exhaust gas treatment device, comprising a hollow tank body and a filter screen, wherein the bottom side wall of the tank body is provided with an air inlet hole, the top wall is provided with an air outlet hole, and the filter screen is arranged between the air inlet hole and the air outlet hole, the outer edge of the filter screen is movably connected to the inner wall of the tank body and sealed, and the interior of the tank body is divided into an upper chamber and a lower chamber by the filter screen;

[0008] A driving part for driving the filter screen to move in the tank body is arranged between the filter screen and the tank body.

[0009] Furthermore, the driving part includes a pressure relief pipe with an open end and a hollow structure, the open end of the pressure relief pipe passes through the exhaust hole and is connected to the middle of the filter screen, and the pressure relief pipe and the exhaust hole are slidably and sealedly matched;

[0010] A vent hole connecting the inner and outer sides of the pressure relief pipe is provided on the side wall of the pressure relief pipe, and the vent hole can move with the pressure relief pipe to the outside of the tank body.

[0011] Furthermore, an elastic support member for supporting the filter screen is provided below the filter screen, one end of the elastic support member abuts against the bottom wall of the tank body, and the other end abuts against the lower plane of the filter screen;

[0012] The pressure relief pipe is provided with a protrusion at one end facing away from the opening. When the protrusion abuts against the top wall of the tank body, the open end of the pressure relief pipe abuts against the filter screen and the elastic support is squeezed and contracted. When the vent hole moves outside the tank body, the pressure relief pipe is out of contact with the filter screen.

[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 with the filter screen axis as the center, and the other end extends radially toward the filter screen, and the upper surface of the cleaning strip is in contact with the lower plane of the filter screen;

[0014] A linkage assembly is arranged between the cleaning strip and the pressure relief pipe. When the pressure relief pipe slides in the exhaust hole, the cleaning strip is driven to rotate on the filter screen through the linkage assembly.

[0015] Furthermore, the linkage assembly includes a rotating rod disposed in the tank body and coaxial with the tank body, one end of the rotating rod is inserted into the bottom wall of the tank body and rotated to fit, and the other end penetrates the filter screen and extends into the opening of the pressure relief pipe, and there is a gap between the outer circular surface of the rotating rod and the inner wall of the pressure relief pipe;

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

[0017] The outer circumferential surface of one end of the rotating rod facing the pressure relief pipe is provided with a sliding groove which spirally extends toward the axial direction of the rotating rod. A sliding block is slidably fitted in the sliding groove, and one end of the sliding block protrudes out of the sliding groove and is fixedly connected to the open end of the pressure relief pipe.

[0018] Furthermore, the middle portion of the rotating rod is prismatic, a sliding sleeve is provided on the outer sleeve of the middle portion of the rotating rod, and the sliding sleeve and the rotating rod are slidably matched along the axial direction of the rotating rod;

[0019] One end of the sliding sleeve is inserted into the filter screen and rotated to fit, and one end of the cleaning strip is fixedly connected to the outer circumferential surface of the sliding sleeve.

[0020] A catalytic combustion exhaust gas treatment system, comprising the above-mentioned catalytic combustion exhaust gas treatment device, and also comprising a collection bottle for collecting solid particles in the lower chamber of the tank body, the collection bottle is arranged outside the tank body, and the bottom of the collection bottle is connected to the lower chamber of the tank body through a pipeline;

[0021] A stop valve for controlling the on-off of the pipeline is arranged on the pipeline between the collecting bottle and the tank body;

[0022] The top side wall of the collecting bottle is provided with a first through hole communicating with the inner and outer sides of the collecting bottle.

[0023] Furthermore, it also includes an air pump for inputting waste gas into the tank body, and the air outlet end of the air pump is connected and communicated with the air inlet;

[0024] The air inlet end of the air pump is communicated with the top of the collecting bottle.

[0025] Furthermore, a dust collecting hole is opened at the bottom of the outer circular surface of the tank body at a position opposite to the air inlet hole, one end of the stop valve is fixedly connected and communicated with one end of the collecting hole outside the box body, and the other end is communicated with the bottom of the collection bottle.

[0026] A method for treating catalytic combustion exhaust gas includes using the above-mentioned catalytic combustion exhaust gas treatment system, and the treatment steps are as follows:

[0027] S1. Preparation: close the stop valve, inject the solvent into the collection bottle, and the liquid level of the solvent is lower than the height of the first through hole, connect the external exhaust gas pipeline with the first through hole, start the vacuum pump to pump the exhaust gas in the collection bottle into the lower chamber of the tank body, and the collection bottle is in a negative pressure state;

[0028] S2. Filter solid particles: Use the pressure relief pipe to block the exhaust hole, and continuously input exhaust gas into the tank body, so that the inside of the tank body is in a high pressure state. Part of the exhaust gas passes through the filter screen and enters the upper chamber to filter out solid particles until the gas in the upper chamber pushes the pressure relief pipe to slide upward in the exhaust hole. When the vent hole moves to the outside of the tank body, the filtered exhaust gas in the upper chamber is discharged;

[0029] S3, separation of solid particles: The filter moves with the pressure relief pipe, and the filter collides with the inner wall of the tank to make the filter vibrate slightly, so that the solid particles adhering to the filter are shaken and separated, and fall into the lower chamber, reducing the probability of the filter holes being blocked;

[0030] S4. Collect solid particles: block the external pipeline for transporting exhaust gas, open the stop valve, connect the lower chamber of the tank body with the bottom of the collecting bottle. Under the pressure difference between the inside of the tank body and the inside of the collecting pipe, the solid particles in the lower chamber follow the exhaust gas into the bottom of the collecting bottle. The solid particles are absorbed and removed by the solvent, and the exhaust gas moves upward to the top of the collecting bottle and enters the tank body again under the action of the air pump, so that the exhaust gas circulates between the inside of the tank body and the inside of the collecting bottle.

[0031] The beneficial effects of the present invention are:

[0032] The catalytic combustion exhaust gas treatment device movably connects the filter screen with the tank body, utilizes the friction and collision between the filter screen and the tank body when the filter screen moves in the tank body, causes the filter screen to vibrate, shakes and separates the solid particles adhering to the filter screen, reduces the probability of the filter screen holes being blocked, and allows the exhaust gas to pass through the filter screen smoothly.

[0033] The catalytic combustion waste gas treatment system and method collects solid particles in the lower chamber of the tank body through a collecting bottle, utilizes the pressure difference between the inside of the tank body and the inside of the collecting bottle to drive the waste gas inside the lower chamber of the tank body carrying the solid particles into the collecting pipe, and absorbs and removes the solid particles through a solvent, thereby reducing the content of solid particles in the lower chamber of the tank body and further reducing the probability of the filter mesh pores being blocked.

[0034] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0036] Figure 2 An exploded view of a tank body in an embodiment of the present invention;

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

[0038] Figure 4 Schematic diagram of the three-dimensional structure of the filter plate in an embodiment of the present invention;

[0039] Figure 5 Schematic diagram of the three-dimensional structure of the pressure relief pipe in an embodiment of the present invention;

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

[0041] Figure 7 Schematic diagram of the three-dimensional structure of the cleaning strip in the embodiment of the present invention;

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

[0043] Fig. 9 for Figure 3 Sectional view of BB (state 1);

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

[0045] Fig.11 for Fig. 9 The enlarged view of point D in the middle;

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

[0047] In the figure: 1, tank body; 11, exhaust hole; 12, air inlet hole; 13, dust collecting hole; 14, strip groove; 141, groove; 2, filter screen; 21, bump; 3, pressure relief pipe; 31, vent hole; 4, compression spring; 5, cleaning strip; 6, rotating rod; 61, slide groove; 62, slider; 63, sleeve; 7, collecting bottle; 71, first through hole; 8, stop valve; 9, vacuum pump. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present 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, further definition and explanation thereof is not required 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 usually placed when in use, which is only for the convenience of describing the present invention 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 operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0052] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0053] See also Figure 1-12 The present invention provides a technical solution: a catalytic combustion exhaust gas treatment device, comprising a hollow tank body 1 and a filter screen 2, wherein the bottom side wall of the tank body 1 is provided with an air inlet hole 12, the top wall is provided with an air outlet hole 11, and the filter screen 2 is arranged between the air inlet hole 12 and the air outlet hole 11, the outer edge of the filter screen 2 is movably connected to the inner wall of the tank body 1, and is sealed, and the interior of the tank body 1 is divided into an upper chamber and a lower chamber by the filter screen 2;

[0054] A driving unit for driving the filter screen 2 to move in the tank body 1 is provided between the filter screen 2 and the tank body 1 .

[0055] In this solution, the filter screen 2 is movably connected to the tank body 1, and the friction and collision between the filter screen 2 and the tank body 1 are utilized during the movement of the filter screen in the tank body 1, so that the filter screen 2 vibrates, and the solid particles adhering to the filter screen 2 are shaken and separated, thereby reducing the probability of the filter screen 2 pores being blocked, and allowing the exhaust gas to pass through the filter screen 2 smoothly.

[0056] Among them, the inner circumferential surface of the tank body 1 is provided with a strip groove 14 extending axially toward the tank body 1, and the outer circumferential surface of the filter screen 2 is fixedly connected with a protrusion 21 adapted to the strip groove 14, and the protrusion 21 is embedded in the strip groove 14 so that the two side surfaces of the protrusion 21 are respectively attached to the two side walls of the strip groove 14, so as to limit the filter screen 2 from rotating around the axis of the tank body 1 in the tank body 1, such as Fig. 9 , 11 Moreover, the outer surface of the filter screen 2 is attached to the inner surface of the tank body 1, so that the filter screen 2 can only move in the tank body 1 along the axial direction of the tank body 1. The bottom end height of the strip groove 14 is higher than the height of the air inlet 12, so that the air inlet 12 is always located in the lower chamber of the tank body 1.

[0057] In addition, the shape of the protrusion 21 is a structure that gradually tapers from the end facing the filter screen 2 to the end facing away from the filter screen 2, so that the end of the protrusion 21 facing away from the filter screen 2 is a sharp tip, and the strip groove 14 is provided with a plurality of grooves 141 that match the tip of the protrusion 21 on a plane facing away from the axis of the tank body 1, and the plurality of grooves 141 are evenly arranged along the length direction of the strip groove 14, and the plurality of grooves 141 are spliced ​​to form a sawtooth shape. The protrusion 21 can be made of materials such as stainless steel, which has a certain toughness, so that the tip of the protrusion 21 can be appropriately bent and then slide through the groove 141.

[0058] When in use, the external exhaust gas delivery pipe is connected to the air inlet 12, and is locked and fixed using a clamp or other equipment, so that the exhaust hole 11 serves as a channel for the gas in the tank body 1 to flow out; then the exhaust gas is injected into the lower chamber of the tank body 1, and the exhaust gas passes through the filter 2 into the upper chamber of the tank body 1 and is finally discharged from the exhaust hole 11; the filter 2 filters and captures solid particles in the exhaust gas, so that the solid particles are retained in the lower chamber of the tank body 1, or adhere to the surface of the filter 2, to filter and purify the exhaust gas.

[0059] When the exhaust volume in the exhaust hole 11 decreases, the filter 2 needs to be dusted, the external exhaust gas delivery pipe can be closed, and the exhaust gas input into the tank body 1 can be stopped. The filter plate is driven to slide in the tank body 1 through the driving unit, so that the protrusion 21 is against an inclined surface of the groove 141, and then bent by force until it slides through the groove 141 and enters the next groove 141. When the tip of the protrusion 21 is out of contact with the inclined surface of the groove 141, the energy is released instantaneously to swing, thereby causing the filter 2 to vibrate. The protrusion 21 continuously slides through multiple grooves 141 to achieve the purpose of continuous vibration of the filter 2, and the solid particles adhering to the filter 2 are shaken and separated and fall into the lower chamber, thereby reducing the probability of the filter holes on the filter 2 being blocked.

[0060] In this embodiment: the driving part includes a pressure relief pipe 3 with an open end and a hollow structure, 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, and the pressure relief pipe 3 and the exhaust hole 11 are slidably and sealedly matched;

[0061] A vent hole 31 communicating with the inside and outside of the pressure relief pipe 3 is provided on the side wall of the pressure relief pipe 3 , and the vent hole 31 can move along with the pressure relief pipe 3 to the outside of the tank body 1 .

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

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

[0064] State 2, such as Fig.12 As shown, the vent hole 31 is located outside the tank body 1 and is connected to the exhaust gas outflow channel in the upper chamber of the tank body 1 , so as to discharge the exhaust gas in the upper chamber of the tank body 1 .

[0065] The pressure relief pipe 3 and the filter screen 2 can be fixedly connected together, so that the filter screen 2 can move along the axial direction of the tank body 1 together 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 in the exhaust hole 11, increasing the overall volume of the inside of the tank body 1 and the pressure relief pipe 3, and 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 for supporting the filter screen 2 is provided below the filter screen 2, one end of the elastic support member abuts against the bottom wall of the tank body 1, and the other end abuts against the lower plane of the filter screen 2;

[0067] The pressure relief pipe 3 is provided with a protrusion at the end facing away from the opening. When the protrusion abuts against the top wall of the tank body 1, the open end of the pressure relief pipe 3 abuts against the filter screen 2 and the elastic support is squeezed and contracted. When the vent hole 31 moves to the outside of the tank body 1, the pressure relief pipe 3 loses contact with the filter screen 2.

[0068] In this solution, the elastic support member is a compression spring 4, the axis of which is parallel to the axis of the tank body 1, and the filter screen 2 is elastically supported by the compression spring 4. The outer dimensions of the protrusion at one end of the pressure relief pipe 3 are larger than the dimensions of the exhaust hole 11, which can limit the pressure relief pipe 3 from completely passing through the exhaust hole 11 and falling into the tank body 1.

[0069] In addition, the pressure relief pipe 3 is in a state of Fig. 9 As shown in the figure, the protrusion abuts against the outer top surface of the tank body 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 overall gravity of the pressure relief pipe 3 and the filter screen 2, so that when the pressure difference between the inside and outside of the tank body 1 is small or equal, the vent hole 31 is always located inside the tank body 1.

[0070] When in use, the pressure relief pipe 3 is initially in state one, and exhaust gas is continuously injected into the tank body 1 to increase the pressure difference between the inside and outside of the tank body 1. The exhaust gas in the tank body 1 applies upward pressure to the pressure relief pipe 3, reducing the pressure applied by the pressure relief pipe 3 to the filter screen 2 and the compression spring 4, causing the compression spring 4 to freely stretch and release energy to push the filter screen 2 and the pressure relief pipe 3 to move upward. When the thrust applied by the exhaust gas to the pressure relief pipe 3 is greater than the gravity of the pressure relief pipe 3, the pressure relief pipe 3 breaks away from the contact with the filter screen 2 and continues to move upward, so that the upper chamber of the tank body 1 can leave the necessary space, until the vent hole 31 moves out of the tank body 1, and the state is two (such as Fig.12 As shown), exhaust gas in the tank body 1 is discharged.

[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 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, and the upper surface of the cleaning strip 5 is in contact with the lower plane of the filter screen 2;

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

[0073] In this scheme, if Figure 4 As shown, a brush or a silicone strip can be arranged on the upper plane of the cleaning strip 5, and the brush or the silicone strip can be used to contact the lower plane of the filter screen 2. The cleaning strip 5 can be made of hard materials (metal, plastic, etc.) and can support the brush or the silicone strip. The middle part of the filter screen 2 is made of hard materials. By rotating one end of the cleaning strip 5 with the middle part of the filter screen 2, the cleaning strip 5 can move relative to the filter screen 2, and the lower plane of the filter screen 2 can be scraped and cleaned, and the solid particles adhering to the filter screen 2 can be further separated.

[0074] In this embodiment: the linkage assembly includes a rotating rod 6 disposed in the tank body 1 and coaxial with the tank body 1, one end of the rotating rod 6 is inserted into the bottom wall of the tank body 1 and rotated to fit, and the other end penetrates the filter screen 2 and extends into the opening of the pressure relief pipe 3, and there is a gap between the outer circumferential 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 connected to the rotating rod 6 in a single degree of freedom sliding manner along the axial direction of the rotating rod 6;

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

[0077] In this solution, the diameter of the rotating rod 6 is smaller than the aperture of the opening end 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 body 1 can flow normally into the pressure relief pipe 3 and finally be discharged to the outside of the tank body 1 from the vent hole 31.

[0078] The diameter of a section of the rotating rod 6 inserted into the bottom wall of the tank body 1 is larger than the diameter of the middle portion of the rotating rod 6, which can limit the axial movement of the rotating rod 6 so that the rotating rod 6 can only rotate in the tank body 1. Figure 6 The middle part of the pressure relief pipe 3 is prismatic, and the exhaust hole 11 is matched with 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 in FIG. Figure 5 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, so that the rotating rod 6 rotates.

[0079] In addition, one end of the cleaning strip 5 and the rotating rod 6 slide with a single degree of freedom along the axial direction of the rotating rod 6 (the axial direction of the tank body 1 ), and the cleaning strip 5 can rotate along with the rotating rod 6 .

[0080] Moreover, the cleaning strip 5 is rotatably connected to the filter screen 2, and the cleaning strip 5 and the filter screen 2 can be moved axially in the tank body 1 as a whole, so that the upper surface of the cleaning strip 5 and the lower plane of the filter screen 2 are kept in contact with each other, such as Figure 4 Moreover, the filter screen 2 can only move axially along the tank body 1, so that the cleaning strip 5 can rotate relative to the filter screen 2.

[0081] Therefore, when the filter screen 2 remains in the tank body 1, the pressure relief pipe 3 moves through the slider 62 and the slide groove 61 to drive the rotating rod 6 to rotate, so that the cleaning bar 5 rotates on the filter screen 2 to perform cleaning work. When the pressure relief pipe 3 moves to move the filter screen 2 in the tank body 1, the cleaning bar 5 rotates on the filter screen 2 to perform cleaning work, and at the same time, the filter screen 2 slides in the strip groove 14, and the cleaning bar 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 outer cover of the middle part of the rotating rod 6, and the sliding sleeve 63 and the rotating rod 6 slide in cooperation 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 rotated to fit, and one end of the cleaning strip 5 is fixedly connected to the outer circumferential 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 adapting the inner hole of the sliding sleeve 63, the sliding sleeve 63 can only slide on the rotating rod 6 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 with the rotating rod 6.

[0085] In addition, an annular groove is opened in the middle of the filter screen 2, and a convex ring matched with the annular groove is set on one end face of the sliding sleeve 63. By embedding the convex ring into the annular groove and rotating it, the sliding sleeve 63 is restricted from moving axially along 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, comprising the above-mentioned catalytic combustion exhaust gas treatment device, and also comprising a collecting bottle 7 for collecting solid particles in the lower chamber of the tank body 1, wherein the collecting bottle 7 is arranged outside the tank body 1, and the bottom of the collecting bottle 7 is connected to the lower chamber of the tank body 1 through a pipeline;

[0087] A stop valve 8 for controlling the on-off of the pipeline is provided on the pipeline between the collecting bottle 7 and the tank body 1;

[0088] The top side wall of the collecting bottle 7 is provided with a first through hole 71 communicating with the inner and outer sides of the collecting bottle 7 .

[0089] In this solution, the collecting bottle 7 is used to store a solvent (water, acid and alkali solution, etc.) that can dissolve and absorb solid particles. An air inlet connector is provided at the bottom of the side wall of the collecting bottle 7, which is connected and communicated with one end of the stop valve 8 through the air inlet connector, so that the gas flowing out of the lower chamber of the tank body 1 enters the bottom of the collecting bottle 7 and is fully mixed with the solvent, so as to dissolve and absorb the solid particles in the exhaust gas.

[0090] Because the solvent is exposed to the air for a long time, there is a phenomenon of volatilization loss and reaction with substances in the air. For example, some acidic solvents (such as carbonic acid solutions) may react with carbon dioxide in the air to generate carbonates or other compounds, thereby changing the composition and properties of the solvent. Therefore, it is difficult to use the solvent for long-term filtration and purification work.

[0091] During use, when it is necessary to collect the solid particles in the lower chamber of the tank body 1, the interior of the tank body 1 is in a high pressure state, and a dissolving agent is injected into the collecting bottle 7 through the first through hole 71 and the first through hole 71 is kept open. The interior of the collecting tube is in a normal pressure state, and the stop valve 8 is opened to connect the lower chamber of the tank body 1 and the interior of the collecting bottle 7. Under the action of the pressure difference between the interior of the tank body 1 and the interior of the collecting bottle 7, an airflow is formed from the lower chamber of the tank body 1 to the bottom of the collecting bottle 7, and the solid particles in the lower chamber of the tank body 1 follow the airflow and enter the collecting bottle 7. After being dissolved and absorbed by the dissolving agent, the waste gas moves upward and is finally discharged from the first through hole 71. The solid particles in the lower chamber of the tank body 1 are collected by the collecting bottle 7, reducing the probability of the filter mesh 2 being blocked. At the same time, clean air can be injected at the air inlet 12 to fully take out the solid particles in the lower chamber of the tank body 1 and clean the tank body 1.

[0092] In this embodiment: it also includes an air pump 9 for inputting waste gas into the tank body 1, and the air outlet end of the air pump 9 is connected and communicated with the air inlet 12;

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

[0094] In this scheme, if Figure 1 As shown, a gas outlet joint is provided on the top side wall of the collecting bottle 7, which is connected to the gas inlet end of the air pump 9 through the gas outlet joint. The air pump 9 is used to pump the gas in the collecting bottle 7 into the lower chamber of the tank body 1. When the first through hole 71 on the collecting bottle 7 is closed and the vent hole 31 is located in the tank body 1, the interior of the tank body 1 and the interior of the collecting bottle 7 are in a closed state as a whole, and the air inside the tank body 1 and the air inside the collecting bottle 7 can be circulated by the air pump 9.

[0095] Among them, the vacuum pump can be selected as Qingdao Maihe FY-1H-N.

[0096] When in use, when using the filter 2 to filter solid particles in the exhaust gas, close the stop valve 8, connect and communicate the external exhaust gas pipeline with the first through hole 71, start the vacuum pump 9, and use the vacuum pump 9 to draw the exhaust gas entering the collection bottle 7 into the lower chamber of the tank body 1, increase the internal pressure of the tank body 1, and the filter 2 starts filtering solid particles.

[0097] When it is necessary to clean the inside of the tank body 1, remove the external exhaust gas delivery pipeline, and inject the solvent into the collection bottle 7 through the first through hole 71, and the liquid level is lower than the height of the air outlet joint, and then block the first through hole 71. Manually press the pressure relief pipe 3 up and down to vibrate or scrape the solid particles adhering to the filter screen 2, and the solid particles fall into the lower chamber of the tank body 1. Start the vacuum pump 9 to pump the exhaust gas in the collection bottle 7 into the tank body 1. The inside of the collection bottle 7 is negative pressure. Open the stop valve 8 to circulate the exhaust gas in the tank body 1 and the exhaust gas in the collection bottle 7. The solid particles in the tank body 1 are fully taken away by the airflow, and are dissolved and absorbed by the solvent and collected in the collection bottle 7.

[0098] In this embodiment: a dust collecting hole 13 is opened at the bottom of the outer cylindrical surface of the tank body 1 at a position opposite to the air inlet hole 12, one end of the stop valve 8 is fixedly connected and communicated with one end of the dust collecting hole 13 outside the box body, and the other end is communicated with the bottom of the collection bottle 7.

[0099] In this embodiment, the dust collecting hole 13 and the air inlet hole 12 are arranged opposite to each other, so that the air in the tank body 1 forms an airflow flowing in the same direction, so as to take away the solid particles in the lower chamber of the tank body 1.

[0100] A method for treating catalytic combustion waste gas includes using the above-mentioned catalytic combustion waste gas treatment system, and the treatment steps are as follows:

[0101] S1. Preparation: close the stop valve 8, inject the solvent into the collection bottle 7, and the liquid level of the solvent is lower than the height of the first through hole 71, connect the external exhaust gas pipeline with the first through hole 71, start the vacuum pump 9 to pump the exhaust gas in the collection bottle 7 into the lower chamber of the tank body 1, and the collection bottle 7 is in a negative pressure state;

[0102] S2. Filtering solid particles: Use the pressure relief pipe 3 to block the exhaust hole 11, and continuously input exhaust gas into the tank body 1, so that the inside of the tank body 1 is in a high pressure state, and part of the exhaust gas passes through the filter screen 2 into the upper chamber to filter out solid particles until the gas in the upper chamber pushes the pressure relief pipe 3 to slide upward in the exhaust hole 11, and when the vent hole 31 moves to the outside of the tank body 1, the filtered exhaust gas in the upper chamber is discharged;

[0103] S3, separation of solid particles: the filter screen 2 moves with the pressure relief pipe 3, and the filter screen 2 is collided with the inner wall of the tank body 1 to make the filter screen 2 vibrate slightly, so that the solid particles adhering to the filter screen 2 are shaken and separated, and fall into the lower chamber, thereby reducing the probability of the filter holes on the filter screen 2 being blocked;

[0104] S4. Collect solid particles: block the external pipeline for transporting exhaust gas, open the stop valve 8, connect the lower chamber of the tank body 1 with the bottom of the collecting bottle 7, and under the pressure difference between the inside of the tank body 1 and the inside of the collecting pipe, the solid particles in the lower chamber follow the exhaust gas into the bottom of the collecting bottle 7, and the solid particles are absorbed and removed by the solvent, and the exhaust gas moves upward to the top of the collecting bottle 7 and enters the tank body 1 again under the action of the air pump, so that the exhaust gas circulates between the inside of the tank body 1 and the inside of the collecting bottle 7.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A catalytic combustion exhaust gas treatment device, comprising a hollow tank body (1) and a filter screen (2), wherein the bottom side wall of the tank body (1) is provided with an air inlet hole (12), the top wall is provided with an exhaust hole (11), and the filter screen (2) is arranged between the air inlet hole (12) and the exhaust hole (11), characterized in that: The outer edge of the filter screen (2) is movably connected to the inner wall of the tank body (1) and is sealed, and the interior of the tank body (1) is divided into an upper chamber and a lower chamber by the filter screen (2); A driving unit for driving the filter screen (2) to move within the tank body (1) is provided between the filter screen (2) and the tank body (1).

2. The catalytic combustion exhaust gas treatment device according to claim 1, characterized in that: The driving part comprises a pressure relief pipe (3) with an open end and a hollow structure, 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), and the pressure relief pipe (3) and the exhaust hole (11) are slidably and sealingly matched; A vent hole (31) is provided on the side wall of the pressure relief pipe (3) and connects the inside and outside of the pressure relief pipe (3), and the vent hole (31) can move along with the pressure relief pipe (3) to the outside of the tank body (1).

3. The catalytic combustion exhaust gas treatment device according to claim 2, characterized in that: An elastic support member for supporting the filter screen (2) is provided below the filter screen (2), one end of the elastic support member abuts against the bottom wall of the tank body (1), and the other end abuts against the lower plane of the filter screen (2); The pressure relief pipe (3) is provided with a protruding portion at one end facing away from the opening. When the protruding portion abuts against the top wall of the tank body (1), the open end of the pressure relief pipe (3) abuts against the filter screen (2) and the elastic support member is squeezed and contracted. When the vent hole (31) moves outside the tank body (1), the pressure relief pipe (3) is out of contact with the filter screen (2).

4. The catalytic combustion exhaust gas treatment device according to claim 2, characterized in that: 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 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), and the upper surface of the cleaning strip (5) is in contact with the lower plane of the filter screen (2); A linkage assembly 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 cleaning strip (5) is driven to rotate on the filter screen (2) through the linkage assembly.

5. The catalytic combustion exhaust gas treatment device according to claim 4, characterized in that: The linkage assembly comprises a rotating rod (6) which is arranged inside the tank body (1) and is coaxial with 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 fit; the other end of the rotating rod (6) penetrates the filter screen (2) and extends into the opening of the pressure relief pipe (3); and a gap exists between the outer cylindrical 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 axis of the rotating rod (6) with a single degree of freedom; The outer circumferential surface of one end of the rotating rod (6) facing the pressure relief pipe (3) is provided with a sliding groove (61) which spirally extends toward the axial direction of the rotating rod (6), and a sliding block (62) is slidably matched in the sliding groove (61), and one end of the sliding block (62) protrudes out of the sliding groove (61) and is fixedly connected to the open end of the pressure relief pipe (3).

6. The catalytic combustion exhaust gas treatment device according to claim 5, characterized in that: The middle part of the rotating rod (6) is prism-shaped, a sliding sleeve (63) is provided on the outer cover of the middle part of the rotating rod (6), and the sliding sleeve (63) and the rotating rod (6) are slidably matched along the axial direction of the rotating rod (6); One end of the sliding sleeve (63) is inserted into the filter screen (2) and rotated to fit, and one end of the cleaning strip (5) is fixedly connected to the outer cylindrical surface of the sliding sleeve (63).

7. A catalytic combustion exhaust gas treatment system, comprising the catalytic combustion exhaust gas treatment device according to any one of claims 2 to 6, characterized in that: It also includes a collecting bottle (7) for collecting solid particles in the lower chamber of the tank body (1), the collecting bottle (7) is arranged outside the tank body (1), and the bottom of the collecting bottle (7) is connected to the lower chamber of the tank body (1) through a pipeline; A stop valve (8) for controlling the on-off of the pipeline is provided on the pipeline between the collecting bottle (7) and the tank body (1); The top side wall of the collecting bottle (7) is provided with a first through hole (71) communicating with the inside and outside of the collecting bottle (7).

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

9. The catalytic combustion exhaust gas treatment system according to claim 7, characterized in that: The outer bottom of the tank body (1) is provided with a dust collecting hole (13) at a position opposite to the air inlet hole (12); one end of the stop valve (8) is fixedly connected and communicated with one end of the collecting hole outside the box body, and the other end is communicated with the bottom of the collecting bottle (7).

10. A method for treating catalytic combustion exhaust gas, comprising using the catalytic combustion exhaust gas treatment system according to claim 8, characterized in that: The processing steps are as follows: S1. Preparation: close the stop valve (8), inject a solvent into the collection bottle (7), and make sure that the liquid level of the solvent is lower than the height of the first through hole (71), connect the external pipe for conveying waste gas to the first through hole (71), start the vacuum pump (9) to pump the waste gas in the collection bottle (7) into the lower chamber of the tank body (1), and the collection bottle (7) is in a negative pressure state; S2. Filtering solid particles: Using the pressure relief pipe (3) to block the exhaust hole (11), exhaust gas is continuously input into the tank body (1), so that the inside of the tank body (1) is in a high pressure state, and part of the exhaust gas passes through the filter screen (2) into 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), and when the vent hole (31) moves to the outside of the tank body (1), the filtered exhaust gas in the upper chamber is discharged; S3, separation of solid particles: the filter (2) moves along with the pressure relief pipe (3), and the friction between the outer cylindrical surface of the filter (2) and the inner wall of the tank body (1) causes the filter (2) to vibrate slightly, thereby shaking off the solid particles adhering to the filter (2) and causing them to fall into the lower chamber, thereby reducing the probability of the filter holes on the filter (2) being blocked; S4. Collecting solid particles: Block the external pipeline for conveying waste gas, open the stop valve (8), connect the lower chamber of the tank body (1) with the bottom of the collecting bottle (7), and under the action of the pressure difference between the inside of the tank body (1) and the inside of the collecting pipe, the solid particles in the lower chamber follow the waste gas into the bottom of the collecting bottle (7), and are removed by absorption by the solvent. The waste gas moves upward to the top of the collecting bottle (7) and enters the tank body (1) again under the action of the air pump, so that the waste gas circulates between the inside of the tank body (1) and the inside of the collecting bottle (7).

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