Smoke filtering structure capable of reducing pressure on filter element

Abstract

The invention relates to the technical field of smoke filtering, in particular to a smoke filtering structure capable of reducing pressure of a filter element. The filter comprises a filter part, the filter part comprises an outer pipe and a filter element cylinder, the filter element cylinder is arranged in the outer pipe, and the bottom of the filter element cylinder is sealed; a first pressurizing part and a second pressurizing part are further included. According to the invention, energy loss caused by transverse expansion of high-speed airflow in the diffusion process is reduced by focusing of narrow gaps, and finally, the high-speed airflow flows out of the gaps in parallel with the axis of the filter element cylinder, so that the high-speed airflow does not apply pressure to the filter element cylinder, thereby reducing the requirement on pressure resistance of the filter element cylinder and improving the filter efficiency. Meanwhile, the service life of the filter element cylinder can be prolonged; besides, the second fan can enable air containing smoke in the cavity to form clean air flow flowing towards the top channel in the filter element cylinder with small suction force after the air is filtered by the filter element cylinder, and finally the clean air flow is efficiently discharged into the top environment through the top channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas filtration, in particular to a flue gas filtration structure with independent air suction and exhaust for reducing pressure on filter element. BACKGROUND

[0002] Nowadays, some flue gas filtration devices are arranged in welding or indoor construction environment, and most of the devices use filter element to filter particles, and flexibility is considered, and the devices are very small, at this time, in order to ensure the collection capacity of flue gas, a high-pressure fan is used to collect and directly blow the collected flue gas into the filter element.

[0003] However, under the continuous high-pressure environment, the physical structure of the filter element may gradually fatigue, thereby shortening the service life. SUMMARY

[0004] The present application aims to provide a flue gas filtration structure for reducing pressure on filter element to solve the problem of short service life caused by high pressure on filter element.

[0005] To achieve the above-mentioned purpose, a flue gas filtration structure for reducing pressure on filter element is provided, which comprises a filter part, the filter part comprises an outer pipe and a filter element cylinder, the filter element cylinder is arranged in the outer pipe, and the bottom of the filter element cylinder is sealed. It also comprises a first booster part and a second booster part, the first booster part and the second booster part are arranged at the bottom and the top of the outer pipe respectively. The first booster part is a high-pressure part or a low-pressure part, which is used to input air flow into the outer pipe. The second booster part is a low-pressure part, which is used to output the air filtered in the filter element cylinder to the outside. Wherein, the first booster part is suspended during use.

[0006] As a further improvement of the technical solution, a bottom channel is arranged in the first booster part along the axial direction thereof and communicates with the outer pipe, and a first fan is arranged in the bottom channel. A top channel is arranged in the second booster part along the axial direction thereof and directly communicates with the filter element cylinder, and a second fan is arranged in the top channel. Wherein, the first fan is a high-pressure fan or a low-pressure fan. The second fan is a low-pressure fan.

[0007] As a further improvement of the technical solution, the air flow blown by the first fan passes between the outer pipe and the filter element cylinder parallel to the axis of the filter element cylinder.

[0008] As a further improvement of the technical solution, the first booster part comprises a base and a bottom cover arranged at the bottom of the base, and the first fan is arranged in the bottom cover. An inner ring plate is arranged in the base, the bottom of the inner ring plate is fixedly connected with the inner wall of the base, and the top of the inner ring plate extends into the cavity between the outer pipe and the filter core cylinder. A supporting plate is arranged outside the bottom cover.

[0009] As a further improvement of the technical solution, the second booster part comprises a top cover and a top cover, and the top cover is arranged at the top of the filter core cylinder, and the second fan is arranged in the top cover. The top cover and the outer pipe are detachably connected.

[0010] As a further improvement of the technical solution, the bottom of the filter core cylinder is provided with a sealing head, and the sealing head is a conical structure with the head downward.

[0011] As a further improvement of the technical solution, a plurality of side grooves are arranged outside the outer pipe, a filter plate is arranged in the side groove, and the filter plate is a grid structure.

[0012] As a further improvement of the technical solution, a plurality of accommodating grooves are arranged on the side wall outside the bottom cover, and a connecting block is fixedly connected to the lower wall inside the accommodating groove. A supporting leg is arranged in the accommodating groove, and a sliding groove slidably connected with the connecting block is arranged on the supporting leg in a vertical state in a vertical direction, and the top end of the sliding groove is bent towards the inside of the accommodating groove. In the first attitude, the supporting leg is accommodated in the accommodating groove. In the second attitude, the supporting leg is unfolded to form a supporting leg.

[0013] As a further improvement of the technical solution, a fixing ring is arranged in the filter core cylinder, and the filter core cylinder is attached to the inner ring plate under the support of the fixing ring.

[0014] As a further improvement of the technical solution, a plurality of sliding rods are arranged inside the inner ring plate, a magnetic plate is slidably connected to the sliding rod, the magnetic plate is fixedly connected to the filter core cylinder, and a variable electromagnetic coil is arranged in the inner ring plate. The electromagnetic coil generates a magnetic property different from that of the magnetic plate, so that the magnetic plate drives the filter core cylinder to be close to the inner ring plate. A docking ring is arranged on the sealing head outside the filter core cylinder. The current direction in the electromagnetic coil is changed to generate the same magnetic property, forming a repulsive force to make the magnetic plate away from the inner ring plate, and finally stop above the docking ring and attach to it.

[0015] Compared with the prior art, the beneficial effects of the present application are: The smoke gas filtering structure of the reduced filter core pressure focuses on the narrow gap, reduces the energy loss of high-speed airflow in the diffusion process due to lateral expansion, and finally the high-speed airflow flows out of the gap parallel to the axis of the filter core cylinder, so that the high-speed airflow does not exert pressure on the filter core cylinder, reduces the pressure of the filter core cylinder, and prolongs the service life of the filter core cylinder. At the same time, the air containing smoke gas outside the side groove is pressed into the chamber between the outer pipe and the filter core cylinder by means of the flow rate difference formed by the high-speed airflow and the side groove, and at this time the second fan can make the air containing smoke gas in the chamber pass through the filter core cylinder for filtering to form clean airflow flowing to the top channel in the filter core cylinder, and finally the clean airflow is efficiently discharged to the top environment through the top channel under the action of the second fan. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is an exploded view of the filtering structure of the present application; Figure 3 It is a schematic diagram of the base component structure of the present application; Figure 4 It is a schematic diagram of the bottom cover component structure of the present application; Figure 5 It is a schematic diagram of the connection principle of the top cover, filter core cylinder and sealing head of the present application; Figure 6 It is a schematic diagram of the Figure 5 enlarged view of structure A of the present application; Figure 7 It is a schematic diagram of the Figure 5 enlarged view of structure B of the present application; Figure 8 It is a schematic diagram of the internal structure of the outer pipe and the fan installation position of the present application; Figure 9 It is a schematic diagram of the overall structure working principle of the first embodiment of the present application; Figure 10 It is a schematic diagram of the overall structure working principle of the second embodiment of the present application; Figure 11 It is a schematic diagram of the Figure 10 enlarged view of structure C of the present application; Figure 12 It is a schematic diagram of the overall structure working principle of the third embodiment of the present application; Figure 13 It is a schematic diagram of the working principle of the magnetic plate of the fourth embodiment of the present application; Figure 14 It is a schematic diagram of the arc-shaped plate and guide cover structure of the fifth embodiment of the present application.

[0017] The meanings of the various reference numbers in the drawings are as follows: 100, filter part; 200, first booster part; 300, second booster part; 110, outer tube; 111, side groove; 112, filter plate; 120, filter core cylinder; 121, sealing head; 1211, first plug-in groove; 122, fixing ring; 123, magnetic plate; 1231, sliding rod; 1232, clamping plate; 124, butt joint ring; 210, base; 211, outer ring plate; 212, inner ring plate; 220, bottom cover; 221, filter screen; 222, support plate; 223, inner edge; 224, inner cavity; 230, support leg; 231, connecting block; 232, sliding groove; 310, top cover; 311, connecting head; 3111, arc-shaped plate; 3112, guide cover; 3113, matching groove; 320, top cover; 321, second plug-in groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] In order to ensure the filtering effect, the filter core in the purification device needs to have sufficient pressure resistance; and under the working condition of continuous high pressure, the physical structure of the filter core may gradually fatigue, resulting in shortened service life.

[0020] In view of the above problems, the applicant of the present application proposes a flue gas filtering structure for reducing the pressure on the filter core, as shown in Figure 1 The filtering structure in the figure is composed of a filter part 100, a first booster part 200 and a second booster part 300, the first booster part 200 and the second booster part 300 are respectively arranged at the bottom and the top of the filter part 100, specifically: As shown in Figure 2As shown, the filtration section 100 includes an outer tube 110 and a filter cartridge 120. Both the outer tube 110 and the filter cartridge 120 are cylindrical structures. Because the cylindrical structure has a large filtration area, the fluid can pass through the filter medium (i.e., the filter cartridge 120, preferably a PTFE membrane filter cartridge) uniformly. Moreover, the inner diameter of the outer tube 110 is larger than the outer diameter of the filter cartridge 120, so that the filter cartridge 120 can be placed inside it. The first pressurization section 200 has a axially penetrating part connected to the outer tube 110. A bottom channel is provided, but this channel is not connected to the filter cartridge 120. A first fan is installed in the bottom channel, that is, the airflow blown by the first fan passes through the outer pipe 110 and the filter cartridge 120 parallel to the axis of the filter cartridge 120; a top channel is provided inside the second pressurizing part 300 along its axial direction and is connected to the filter cartridge 120, but this channel is not connected to the outer pipe 110. A second fan is installed in the top channel, that is, the second fan blows the air in the filter cartridge 120 towards the top channel, wherein: The second fan directly connected to the filter cartridge 120 is a low-pressure fan; The first fan is either a high-pressure fan or a low-pressure fan.

[0021] In the first embodiment, such as Figure 2 As shown, a top cover 320 is provided on the top of the filter cartridge 120. The outer diameter of the top cover 320 is slightly larger than the outer diameter of the filter cartridge 120. Figure 6 As shown, the bottom of the top cover 320 is provided with a second insertion groove 321 that matches the contour of the filter cartridge 120, and then... Figure 5 As shown, the top of the filter cartridge 120 is inserted into the second insertion slot 321; as Figure 5 As shown, a sealing head 121 is provided at the bottom of the filter cartridge 120. Similarly, the outer diameter of the sealing head 121 is slightly larger than the outer diameter of the filter cartridge 120. Figure 7 As shown, the top of the sealing head 121 has a first insertion groove 1211 that is inserted into the filter cartridge 120.

[0022] Based on the above disclosure, the filter cartridge 120, sealing head 121, and top cover 320 form an integrated filter cartridge structure. The sealing head 121 seals the bottom of the filter cartridge 120, and the channel inside the top cover 320 (i.e., the top channel) directly communicates with the filter cartridge 120. (See [link to relevant documentation]). Figure 2 As shown, a top cover 310 is fixedly connected to the outside of the top cover 320. The top cover 310 and the top cover 320 together constitute the second pressurization part 300. The top cover 310 and the outer tube 110 are detachably connected (the detachable connection methods include threaded connection, magnetic engagement, plug-in and snap-fit, etc.).

[0023] Based on the above structure, the process of disassembling and assembling the filter cartridge 120 is as follows: When disassembling, lay the filter structure horizontally, first make the top cover 310 separate from the outer tube 110 according to the connection mode of the top cover 310 and the outer tube 110, take out the integrated filter core structure (filter core barrel 120, sealing head 121 and top cover 320) from the outer tube 110 in a vertical manner through the top cover 310, then disassemble the top cover 320 and the sealing head 121 from the filter core barrel 120, and replace the old filter core barrel 120.

[0024] When assembling, as shown in Figure 2 and Figure 5 , connect the new filter core barrel 120 with the top cover 320 and the sealing head 121, then insert the integrated filter core structure into the outer tube 110 in a vertical manner (the filter core barrel 120 is coaxially arranged with the outer tube 110), and fix the top cover 310 with the outer tube 110, so that the fixed top cover 310 blocks the gap between the outer tube 110 and the top cover 320 at the top, thereby completing the replacement of the filter core barrel 120.

[0025] It should be emphasized that, in order to ensure the stability of the connection between the second plug-in groove 321 and the first plug-in groove 1211 and the filter core barrel 120, engaging members (such as buckles, screws, etc.) are usually arranged at both ends of the filter core barrel 120 to connect with the top cover 320 and the sealing head 121.

[0026] In addition, as shown in Figure 2 , the bottom of the base 210 is provided with a bottom cover 220, and the base 210 and the bottom cover 220 jointly constitute the first booster part 200, wherein: Referring to Figure 3 , the top of the base 210 is provided with an outer ring plate 211, which is detachably connected with the bottom of the outer tube 110 (the detachable connection modes include threaded connection, magnetic attraction cooperation, plug-in and clamping, etc.), and the channel (i.e. the bottom channel) jointly formed by the inner cavity of the base 210 and the inner cavity 224 of the bottom cover 220 is in communication with the outer tube 110, because the sealing head 121 blocks the bottom of the filter core barrel 120, so the bottom channel will not be in communication with the filter core barrel 120.

[0027] In specific implementation, an inner edge 223 is arranged in the inner cavity 224 of the bottom cover 220 for supporting the base 210, because the base 210 is detachably connected with the bottom cover 220 (the detachable connection modes include threaded connection, magnetic attraction cooperation, plug-in and clamping, etc.), and a supporting plate 222 is arranged outside the bottom cover 220, in this embodiment, the filter structure is used on the workbench, and a plurality of through holes with an outer diameter matching that of the bottom cover 220 are arranged on the workbench adjacent to the electric welding equipment, as shown in Figure 9 , the bottom cover 220 is placed in the through hole, and the supporting plate 222 is supported by the workbench, so that the bottom cover 220 is suspended on the bottom of the workbench, and the bottom channel is in communication with the environment of the bottom of the workbench.

[0028] AsFigure 8 As shown, the bottom space a is provided with the first fan in the bottom channel, and the top space b is provided with the second fan in the top channel, see Figure 2 As shown, the outer tube 110 is provided with a plurality of side grooves 111, and the filter plate 112 is installed in the side groove 111. The filter plate 112 is a grid structure, which protects the inner filter cartridge 120, as shown in Figure 9 As shown, the electric welding equipment works, and the first fan (denoted by a) and the second fan (denoted by b) are running. The second fan b is a high-pressure fan, and when the second fan b is running, the air in the table bottom environment (because it is isolated by the table top, there is no welding generated smoke) is sucked into the bottom channel to form an air flow e. Combined with Figure 3 As shown, the inner ring plate 212 is provided in the base 210, the bottom of the inner ring plate 212 is outwardly bent and fixedly connected with the inner wall of the base 210, and the top of the inner ring plate 212 extends into the cavity between the outer tube 110 and the filter cartridge 120. Here, the sealing head 121 is a conical structure with the head downward. When the air flow e passes through the gap between the inner ring plate 212 and the sealing head 121, the speed of the air flow e increases due to the restriction of the gap, and a high-speed air flow is obtained (the solid arrow in the middle). Figure 9 According to Bernoulli's principle, as the speed increases, the dynamic pressure also increases. The dynamic pressure is a manifestation of the kinetic energy of the air flow e. Higher dynamic pressure means that the high-speed air flow has greater kinetic energy, which enables the high-speed air flow to travel faster and longer distances. In addition, the high-speed air flow is focused by the narrow gap, reducing the energy loss of the high-speed air flow due to lateral expansion during diffusion. Finally, the high-speed air flow flows out of the gap parallel to the axis of the filter cartridge 120. In this way, the high-speed air flow does not exert pressure on the filter cartridge 120, but can use the flow rate difference formed by the high-speed air flow and the side groove 111 to press the air g outside the side groove 111 into the cavity between the outer tube 110 and the filter cartridge 120. Because the side groove 111 is exposed to the welding environment, the air outside the side groove 111 contains smoke. At this time, the second fan b can use a smaller suction force to make the air containing smoke in the cavity pass through the filter cartridge 120 for filtration, and then form a clean air flow f in the filter cartridge 120 flowing to the top channel. Finally, the clean air flow f is discharged to the top environment through the top channel under the action of the second fan b.

[0029] Preferably, as shown in Figure 4 As shown, the filter screen 221 is provided in the bottom of the bottom cover 220, which filters the air entering the bottom channel and prevents large particles from blocking the gap between the inner ring plate 212 and the sealing head 121.

[0030] The second embodiment, as shown in Figure 10 As shown, a plurality of accommodation grooves are provided on the side wall of the bottom cover 220, and a recess is provided at the top of the accommodation groove. Combined with Figure 11As shown, the lower wall of the inner side of the accommodating groove is fixedly connected with a connecting block 231, and a supporting leg 230 is arranged in the accommodating groove. The supporting leg 230 in the vertical state is provided with a sliding groove 232 in the vertical direction, and the sliding groove 232 is slidably connected with the connecting block 231. The top end of the sliding groove 232 is bent towards the inner side of the accommodating groove. The supporting leg 230 has two postures, which are as follows. In the first posture, the supporting leg 230 is vertically inserted into the groove and is accommodated in the accommodating groove. In the second posture, the supporting leg 230 is pulled out of the groove and is moved downward, so that the bottom end of the supporting leg 230 is located below the bottom cover 220. At this time, the connecting block 231 slides to the end of the bent part of the sliding groove 232, and then the supporting leg 230 is rotated outward. When all the supporting legs 230 around the bottom cover 220 are unfolded, a supporting leg is formed, and under the support of the supporting leg, the filter structure can be placed on the workbench d (at this time, the included angle between the supporting leg 230 and the workbench d is equal to the included angle of the bent part), and the bottom cover 220 is suspended. The second posture can return to the first posture through the reverse operation of the above process.

[0031] Different from the first embodiment, in the present embodiment, the filter structure is placed on the workbench d, and the suspended bottom cover 220 can suck the smoke on the workbench d when the first fan a operates, especially the particles falling on the workbench d.

[0032] It should be emphasized that in the above two embodiments, the filter screen 221 at the bottom can also play a role in receiving the aggregates filtered out by the filter core cylinder 120, but most of the aggregates are still in the cavity between the outer pipe 110 and the filter core cylinder 120.

[0033] The third embodiment is as shown in the following figure: Figure 12 On the basis of the second embodiment, a fixed ring 122 is arranged in the filter core cylinder 120, and the filter core cylinder 120 is attached to the inner ring plate 212 under the support of the fixed ring 122. For the star-shaped section of the filter core cylinder 120, the folded part will be unfolded or stacked under the support of the fixed ring 122, so as to ensure the tightness of the attachment of the filter core cylinder 120 to the inner ring plate 212. Different from the second embodiment, in the present embodiment, the part of the filter core cylinder 120 supported by the fixed ring 122 protrudes outward and is attached to the inner ring plate 212. In this way, the airflow flowing through the gap between the inner ring plate 212 and the sealing head 121 passes through the filter core cylinder 120 and enters the inside. At this time, part of the force exerted on the filter core cylinder 120 by the airflow is shared by the fixed ring 122, which reduces the impact of the high-pressure fan (i.e. the first fan a) on the filter core cylinder 120. Finally, the clean airflow in the filter core cylinder 120 is discharged to the top environment through the top channel under the action of the second fan b.

[0034] In the present embodiment, the first fan a can also be a low-pressure fan.

[0035] In addition, asFigure 12 As shown, the height of the bottom edge h1 in the side groove 111 is higher than the height of the top edge h2 of the inner ring plate 212, so that the aggregates are guided into the cavity between the inner ring plate 212 and the outer tube 110 through the inclined outer surface of the filter cartridge 120 for storage.

[0036] The fourth embodiment, see Figure 13 As shown, this embodiment is a parallel implementation of the third embodiment, and the inner side of the inner ring plate 212 is provided with a plurality of sliding rods 1231, and the sliding rods 1231 are slidingly connected with magnetic plates 123, so that the inner ring plate 212 is provided with a variable electromagnetic coil, and in the first attitude, the electromagnetic coil generates a magnetic property different from that of the magnetic plate 123, so that the magnetic plate 123 drives the filter cartridge 120 to be close to the inner ring plate 212 (the filter cartridge 120 is fixedly connected with the magnetic plate 123 through the extrusion of the clamp plate 1232), at this time, the working mode is formed which is the same as that of the third embodiment; in the second attitude, the current direction in the electromagnetic coil is changed, and the same magnetic property is generated, so that a repulsive force is generated to make the magnetic plate 123 away from the inner ring plate 212, and finally stop above the abutting ring 124 and abut with it, and the abutting ring 124 is specifically arranged on the sealing head 121 and located on the outer side of the filter cartridge 120, at this time, the working mode is formed which is the same as that of the second embodiment, and after the abutting of the magnetic plate 123 and the abutting ring 124, the gap between the inner ring plate 212 and the sealing head 121 is extended, and the longer gap can better focus the airflow, so that the airflow is more concentrated, reducing the turbulence in the airflow, thereby ensuring that the airflow can be as parallel as possible to the axis of the filter cartridge 120 to flow out, so as to reduce the acting force of the airflow on the filter cartridge 120.

[0037] The fifth embodiment, in any one of the above embodiments, as Figure 5 and Figure 14 As shown, the top of the top cover 310 is provided with a connecting head 311 with a flow channel inside, and the connecting head 311 can be connected with an arc-shaped plate 3111 outside, so that the airflow discharged from the flow channel of the connecting head 311 is guided through the arc-shaped plate 3111 and flows towards the lower flow channel of the periphery, so as to use the filtered airflow to press down the smoke as much as possible, so that the smoke is within the inhalable range of the side groove 111.

[0038] Alternatively, a guide cover 3112 is arranged on the top of the connecting head 311, a plurality of openings are arranged on the top of the guide cover 3112 and inclined upward, and the openings are in communication with a matching groove 3113, so that the airflow discharged from the flow channel of the connecting head 311 is discharged from the openings after passing through the matching groove 3113, and the matching groove 3113 can be provided with a condensing device or filled with air purification particles (such as activated carbon, flavoring particles, etc.), so as to perform secondary utilization or secondary purification treatment on the discharged airflow.

[0039] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A flue gas filtration structure for reducing filter element pressure, comprising a filter section (100), the filter section (100) comprising an outer tube (110) and a filter element cylinder (120), the filter element cylinder (120) being disposed within the outer tube (110), characterized in that, The bottom of the filter cartridge (120) is sealed; It also includes a first pressurizing section (200) and a second pressurizing section (300), which are respectively disposed at the bottom and top of the outer tube (110); The first pressurization section (200) is a high-pressure section or a low-pressure section, used to input airflow into the outer pipe (110); The second pressurization section (300) is a low-pressure section used to output the air filtered by it inside the filter cartridge (120) to the outside; The first booster unit (200) is suspended during use.

2. The flue gas filtration structure for reducing filter element pressure according to claim 1, characterized in that, The first pressurization unit (200) has a bottom channel that communicates with the outer pipe (110) through its axial direction, and a first fan is installed in the bottom channel; The second pressurization section (300) has a top channel that runs through its axial direction and is directly connected to the filter cartridge (120). A second fan is installed in the top channel. The first fan is either a high-pressure fan or a low-pressure fan; The second fan is a low-pressure fan.

3. The flue gas filtration structure for reducing filter element pressure according to claim 1 or 2, characterized in that, The airflow entering the outer tube (110) passes through the outer tube (110) and the filter cartridge (120) parallel to the axis of the filter cartridge (120).

4. The flue gas filtration structure for reducing filter element pressure according to claim 3, characterized in that, The first booster unit (200) includes a base (210) and a bottom cover (220) disposed at the bottom of the base (210), and the first fan is disposed inside the bottom cover (220); The base (210) is provided with an inner ring plate (212), the bottom of the inner ring plate (212) is bent outward and fixedly connected to the inner wall of the base (210), and the top of the inner ring plate (212) extends into the cavity between the outer tube (110) and the filter cartridge (120); A support plate (222) is provided outside the bottom cover (220).

5. The flue gas filtration structure for reducing filter element pressure according to claim 2, characterized in that, The second pressurization unit (300) includes a top cover (310) and a top cover (320), the top cover (320) being disposed on the top of the filter cartridge (120), and the second fan being disposed inside the top cover (320); The top cover (310) and the outer tube (110) are detachably connected.

6. The flue gas filtration structure for reducing filter element pressure according to claim 4, characterized in that, The bottom of the filter cartridge (120) is provided with a sealing head (121), which is a cone-shaped structure with the head facing downward.

7. The flue gas filtration structure for reducing filter element pressure according to claim 6, characterized in that, The outer tube (110) is provided with a plurality of side grooves (111), and a filter plate (112) is installed in the side grooves (111). The filter plate (112) is a grid structure.

8. The flue gas filtration structure for reducing filter element pressure according to claim 6, characterized in that, Multiple receiving slots are provided on the side wall outside the bottom cover (220), and a connecting block (231) is fixedly connected to the lower inner wall of the receiving slot. The receiving groove is provided with a support leg (230). The vertical support leg (230) has a sliding groove (232) that is slidably connected to the connecting block (231) along the vertical direction. The top of the sliding groove (232) bends inward toward the receiving groove. The support leg (230) has two postures, as follows: In the first posture, the support leg (230) is retracted into the receiving groove; In the second posture, the outrigger (230) unfolds to form a supporting leg.

9. The flue gas filtration structure for reducing filter element pressure according to claim 8, characterized in that, A fixing ring (122) is provided inside the filter cartridge (120), and the filter cartridge (120) is in contact with the inner ring plate (212) under the support of the fixing ring (122).

10. The flue gas filtration structure for reducing filter element pressure according to claim 8, characterized in that, The inner ring plate (212) is provided with a plurality of slide rods (1231) on the inner side, and a magnetic plate (123) is slidably connected on the slide rods (1231). The magnetic plate (123) is fixedly connected to the filter cartridge (120). A variable electromagnetic coil is provided inside the inner ring plate (212). Among them, the electromagnetic coil generates a magnetism that is different from that of the magnetic plate (123), causing the magnetic plate (123) to drive the filter cartridge (120) to come close to the inner ring plate (212). A docking ring (124) is provided on the outer side of the filter element cylinder (120) on the sealing head (121). The direction of the current in the electromagnetic coil changes, generating the same magnetism, forming a repulsive force, causing the magnetic plate (123) to move away from the inner ring plate (212), and finally stop above the docking ring (124) and fit against it.

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