An industrial waste gas filtering and separating device

Abstract

The application relates to an industrial waste gas filtering and separating device and relates to the field of environmental protection equipment. The device comprises a box body, a first filtering assembly, a second filtering assembly and a linkage driving mechanism. The linkage driving mechanism comprises a driving shaft, a driving gear, a first gear rack and a second gear rack. The first gear rack and the second gear rack are arranged in parallel and oppositely on the radial sides of the driving gear, so that when the driving shaft rotates, the first frame and the second frame synchronously slide in opposite directions. The application simultaneously drives the two reverse motion gear racks through a driving gear, realizes synchronous control of the two filtering assemblies, greatly simplifies the maintenance operation, improves the equipment maintenance efficiency, is compact in structure, stable in transmission and achieves better cooperation.

Description

Technical Field

[0001] This application relates to the field of environmental protection equipment technology, and in particular to a filtration and separation device for treating industrial waste gas. Background Technology

[0002] Industrial waste gas treatment is an important part of environmental protection. Production processes in industries such as spraying, chemicals, metallurgy, and power generation generate large amounts of waste gas containing dust, particulate matter, and harmful components. Waste gas filtration and separation equipment, such as bag filters, cartridge filters, or plate filters, are the core treatment units. The core function of these devices is to trap solid particles in the waste gas through filter media (such as filter cloth or filter screens), allowing clean gas to be discharged.

[0003] In existing technologies, to achieve ideal purification results, a single piece of equipment often incorporates multiple stages of filtration components. For example, a coarse filter is installed at the air inlet to intercept large dust particles, while a medium- or high-efficiency filter is installed at the air outlet to intercept fine particles. This gradient filtration structure can extend the lifespan of the high-efficiency filter and improve overall filtration efficiency. However, after long-term operation, these filter components accumulate a large amount of dust on their surfaces, leading to increased filtration resistance and energy consumption, requiring regular cleaning or replacement. Traditional cleaning methods typically involve opening the equipment's access door and manually disassembling, cleaning, or replacing each stage of the filter. When the internal space of the equipment is limited or there are many filters, this maintenance method is not only cumbersome and labor-intensive but also time-consuming, requiring prolonged equipment downtime and disrupting the normal operation of the production line.

[0004] Therefore, how to simplify the maintenance of multi-stage filtration components, improve maintenance efficiency, and reduce downtime is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To improve product quality and production efficiency, this invention provides an industrial waste gas filtration and separation device.

[0006] This application provides an industrial waste gas filtration and separation device, including: a housing, on which an air inlet and an air outlet are respectively provided on opposite sides; The first filter assembly is disposed in the housing near the air inlet, and includes a first filter screen and a first frame for mounting the first filter screen, wherein the first frame is slidably connected to the housing. The second filter assembly is disposed in the housing near the air outlet, and includes a second filter screen and a second frame for mounting the second filter screen, wherein the second frame is slidably connected to the housing. The linkage drive mechanism includes: a drive shaft rotatably supported on the housing, one end of which is provided with an operating handle or connected to an external power source; a drive gear fixedly mounted on the drive shaft; a first rack fixed on the first frame and meshing with one side of the drive gear; and a second rack fixed on the second frame and meshing with the other side of the drive gear. The first rack and the second rack are parallel to each other and arranged opposite to each other on the radial sides of the drive gear, such that when the drive shaft rotates, the first frame and the second frame slide synchronously in opposite directions.

[0007] Preferably, the linkage drive mechanism further includes: an auxiliary transmission shaft arranged perpendicularly to the drive shaft; a first bevel gear fixed to the drive shaft; a second bevel gear fixed to one end of the auxiliary transmission shaft and meshing with the first bevel gear; an auxiliary gear fixed to the other end of the auxiliary transmission shaft; and an auxiliary rack meshing with the auxiliary gear on the first frame and / or the second frame to enhance the smoothness of the frame movement.

[0008] By adopting the above technical solution, when the drive shaft rotates, the power is transmitted to the auxiliary transmission shaft through the first and second bevel gears, driving the auxiliary gear to rotate, and in turn driving the auxiliary rack and the frame connected to it to move. This provides additional support and driving force to the main drive gear-rack mechanism, making the long-stroke or heavy frame slide more smoothly and less prone to jamming or deflection.

[0009] Preferably, the mesh diameter of the first filter screen is larger than that of the second filter screen, forming a gradient filtration structure from the air inlet to the air outlet.

[0010] By adopting the above technical solution, the exhaust gas first passes through a first filter with larger mesh size to intercept large dust particles, and then passes through a second filter with smaller mesh size to intercept fine dust particles. This gradient filtration method can effectively prevent the second filter from being quickly clogged by large dust particles, extending its service life, while improving the overall filtration accuracy.

[0011] Preferably, the assembly further includes a dust removal component, comprising: a first scraper disposed on the first frame and closely attached to the windward side of the first filter screen; a second scraper disposed on the second frame and closely attached to the windward side of the second filter screen; a rotating screw rotatably disposed within the first frame and the second frame, the rotating screw being threadedly connected to the first scraper and the second scraper; and a movable wheel coaxially fixedly connected to the top end of the rotating screw, the movable wheel being slidably connected to the inner wall of the housing; when the first frame and the second frame slide in opposite directions, the friction between the movable wheel and the inner wall of the housing drives the rotating screw to rotate, thereby driving the first scraper and the second scraper to move axially along the rotating screw, moving relative to the corresponding filter screen surface, and scraping off the dust adhering to the filter screen.

[0012] By adopting the above technical solution, while the frame is driven to slide for maintenance, the friction between the moving wheels and the inner wall of the housing is converted into the rotational power of the screw, which in turn drives the scraper to move along the surface of the filter screen. This interlocks the cleaning and sliding actions, enabling automatic dust removal without additional power sources or manual operation, greatly improving the convenience and thoroughness of cleaning.

[0013] Preferably, the bottom of the housing is provided with a dust collection hopper, and below the dust collection hopper is an openable and closable ash discharge valve.

[0014] By adopting the above technical solution, the dust cleaned by the scraper falls into the dust collection hopper under gravity. The accumulated dust can be discharged outside the equipment by periodically opening the ash discharge valve, which avoids secondary dust and keeps the working environment clean.

[0015] In summary, the present invention has at least the following beneficial effects: 1. Because the present invention uses a single driving gear to simultaneously drive two parallel and oppositely arranged racks, the first filter assembly and the second filter assembly can slide synchronously in opposite directions, achieving the effect of moving both filters to the maintenance position with a single operation. Compared with the traditional method of operating separately, the maintenance time is reduced by more than 50%, achieving a significant efficiency improvement.

[0016] 2. In this invention, a dust removal assembly consisting of a moving wheel, a rotating screw, and a scraper is preferably used. During the sliding maintenance of the filter screen, the kinetic energy of the frame movement automatically drives the scraper to clean the surface of the filter screen, achieving a synergistic effect that combines the two actions of "movement" and "cleaning" into one. No additional power is required, the operation is simple, and the cleaning is thorough. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an industrial waste gas filtration and separation device.

[0018] Figure 2 This is a cross-sectional structural diagram of an industrial waste gas filtration and separation device.

[0019] Figure 3 A cross-sectional structural diagram of an industrial waste gas filtration and separation device from another angle.

[0020] Figure 4 This is a schematic diagram of the internal structure of an industrial waste gas filtration and separation device.

[0021] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Air inlet; 12. Air outlet; 2. First filter assembly; 21. First filter screen; 22. First frame; 3. Second filter assembly; 31. Second filter screen; 32. Second frame; 4. Linkage drive mechanism; 41. Drive shaft; 42. Handle; 43. Drive gear; 44. First rack; 45. Second rack; 46. Auxiliary transmission shaft; 47. First bevel gear; 48. Second bevel gear; 49. Auxiliary gear; 5. Dust removal assembly; 51. First scraper; 52. Second scraper; 53. Rotating screw; 54. Moving wheel; 6. Dust collection hopper; 7. Ash discharge valve. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to all the accompanying drawings.

[0023] Example 1

[0024] This embodiment discloses an industrial waste gas filtration and separation device, including a housing 1, a first filter component 2, a second filter component 3, a linkage drive mechanism 4, a dust removal component 5, a dust collection hopper 6, and a dust discharge valve 7.

[0025] Reference Figures 1-4 The housing 1 is a hollow rectangular shell structure with an air inlet 11 on its left side wall and an air outlet 12 on its right side wall. Exhaust gas enters through the left air inlet 11, is filtered, and exits through the right air outlet 12. The first filter assembly 2 is located inside the housing 1 near the air inlet 11. It includes a first filter screen 21 and a first frame 22. The first filter screen 21 is embedded and fixed at the central opening of the first frame 22. The first filter screen 21 is a coarse filter with a relatively large mesh diameter, such as a metal wire mesh with a mesh side length of 5mm.

[0026] Reference Figures 1-4The second filter assembly 3 is located inside the housing 1 near the air outlet 12. Its structure is similar to that of the first filter assembly 2, including a second filter screen 31 and a second frame 32. The second filter screen 31 is a high-efficiency filter screen with a mesh diameter smaller than that of the first filter screen 21, for example, a non-woven fabric filter material with a mesh side length of 1mm. The mesh diameter of the first filter screen 21 is larger than that of the second filter screen 31, thus forming a gradient filtration structure from the air inlet 11 to the air outlet 12. Its purpose is to first intercept large dust particles and protect the subsequent high-efficiency filter screen.

[0027] Reference Figures 1-4 The linkage drive mechanism 4 is used to drive the first frame 22 and the second frame 32 to slide synchronously in opposite directions. It includes a drive shaft 41, a drive gear 43, a first rack 44, and a second rack 45. The drive shaft 41 is rotatably supported on the front or rear wall of the housing 1 by bearings, and one end of it extends outside the housing 1 and is fixedly connected to an operating handle 42, which can be manually cranked by the operator. In some embodiments, the position of the operating handle 42 can also be connected to a motor as an external power source. The drive gear 43 is fixedly mounted on the drive shaft 41 located inside the housing 1 by a key connection. The first rack 44 is fixedly mounted on the side of the first frame 22, with its tooth surface facing the drive gear 43 and meshing with one side of the drive gear 43. The second rack 45 is fixedly mounted on the side of the second frame 32, with its tooth surface also facing the drive gear 43, but meshing with the other side of the drive gear 43. Importantly, the first rack 44 and the second rack 45 are parallel to each other and are located on opposite radial sides of the drive gear 43. Therefore, when the drive shaft 41 drives the drive gear 43 to rotate clockwise, the first rack 44 (located above) is driven to move to the right, thereby pushing the first frame 22 to slide to the right; at the same time, the second rack 45 (located below) is driven to move to the left, thereby pushing the second frame 32 to slide to the left. Conversely, when the handle is rotated counterclockwise, the two frames slide towards each other.

[0028] Reference Figures 1-4The dust removal assembly 5 is used to automatically clean the filter screen when the frame slides. It includes a first scraper 51, a second scraper 52, a rotating screw 53, and a moving wheel 54. The first scraper 51 is installed inside the first frame 22, with its blade in close contact with the windward side (i.e., the air intake side surface) of the first filter screen 21. The second scraper 52 is installed in the same manner inside the second frame 32, in close contact with the windward side of the second filter screen 31. A rotating screw 53 is vertically and rotatably installed in each frame (22, 32). The rotating screw 53 passes through the corresponding scraper (51, 52) and forms a helical drive engagement with the threaded hole on the scraper. A moving wheel 54 is coaxially fixedly connected to the top of the rotating screw 53. The moving wheel 54 extends out of the top of the frame, and its rim elastically contacts the inner top wall of the housing 1 and can roll. When the frame is pushed horizontally by the linkage drive mechanism 4, the moving wheel 54 begins to roll due to the static friction with the inner wall of the housing 1, thereby driving the rotating screw 53, which is coaxial with it, to rotate together. The rotating screw 53 drives the scraper to move along the axial direction (i.e., vertical direction) of the screw through the thread. Therefore, when the frame moves horizontally for maintenance, the scraper moves vertically on the surface of the filter screen at the same time, realizing the cleaning of the entire screen surface. The scraped dust falls into the dust collection hopper 6 at the bottom of the housing 1 under the action of gravity. A closable dust discharge valve 7 is provided below the dust collection hopper 6. The collected dust can be discharged by periodically opening the dust discharge valve 7.

[0029] The implementation principle of Example 1 is as follows: During normal operation, both the first filter assembly 2 and the second filter assembly 3 are located inside the housing 1 and are in the working position, with exhaust gas being purified by passing through the two-stage filter screens sequentially. When maintenance is required, the operator only needs to turn an operating handle 42. The rotational movement of the handle 42 is converted into linear motion of the first rack 44 and the second rack 45 via the drive shaft 41 and the drive gear 43. Since the two racks are located on opposite sides of the gear, their directions of motion are opposite. This allows the first frame 22 and the second frame 32 to be pushed to the left and right sides of the housing 1 with a single action, exposing them for easy inspection and maintenance. Simultaneously, the sliding motion of the frames triggers the dust removal assembly 5: the friction between the moving wheel 54 and the inner wall of the housing 1 causes the rotating screw 53 to rotate, which in turn drives the scraper to move vertically across the filter screen surface, scraping the accumulated dust into the dust collection hopper 6 below. The entire maintenance process, including "removal" and "cleaning," is completed through a continuous mechanical linkage, greatly improving efficiency.

[0030] Example 2

[0031] The difference in this embodiment lies in the further optimization of the linkage drive mechanism 4. Based on embodiment 1, in order to increase the smoothness of the long-stroke frame sliding, the linkage drive mechanism 4 in this embodiment also includes an auxiliary transmission shaft 46, a first bevel gear 47, a second bevel gear 48, an auxiliary gear 49, and an auxiliary rack 50.

[0032] Specifically, an auxiliary transmission shaft 46, spatially perpendicular to the drive shaft 41, is added to the top or bottom of the housing 1. A first bevel gear 47 is fixedly mounted on the drive shaft 41, and a second bevel gear 48 is fixedly mounted on one end of the auxiliary transmission shaft 46, with the first bevel gear 47 and the second bevel gear 48 meshing with each other. An auxiliary gear 49 is fixedly mounted on the other end of the auxiliary transmission shaft 46. Correspondingly, an auxiliary rack 50 is fixedly mounted on the top (or bottom) of both the first frame 22 and the second frame 32, and the auxiliary rack 50 meshes with the auxiliary gear 49.

[0033] When the drive shaft 41 rotates, the power is transmitted not only to the main rack via the drive gear 43, but also vertically to the auxiliary drive shaft 46 through the meshing of the first bevel gear 47 and the second bevel gear 48, causing it to rotate synchronously. The auxiliary drive shaft 46 drives the auxiliary gear 49 to rotate, thereby driving the auxiliary rack 50. In this way, both the upper and lower ends of the first frame 22 and the second frame 32 are subjected to synchronous driving force, effectively preventing deflection or jamming that may occur due to unilateral drive, making the frame sliding more smoothly. This dual-sided or synchronous drive effect is particularly significant for heavy filter components or scenarios requiring long-distance sliding.

[0034] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An industrial waste gas filtration and separation device, characterized in that, It includes a housing (1), with an air inlet (11) and an air outlet (12) on opposite sides. The first filter assembly (2) is disposed inside the housing (1) on the side near the air inlet (11), and includes a first filter screen (21) and a first frame (22) for mounting the first filter screen (21), wherein the first frame (22) is slidably connected to the housing (1); The second filter assembly (3) is disposed inside the housing (1) on the side near the air outlet (12), and includes a second filter screen (31) and a second frame (32) for mounting the second filter screen (31), wherein the second frame (32) is slidably connected to the housing (1); The linkage drive mechanism (4) includes: a drive shaft (41) rotatably supported on the housing (1), one end of which is provided with an operating handle (42) or connected to an external power source; a drive gear (43) fixedly mounted on the drive shaft (41); a first rack (44) fixed on the first frame (22) and meshing with one side of the drive gear (43); a second rack (45) fixed on the second frame (32) and meshing with the other side of the drive gear (43); the first rack (44) and the second rack (45) are parallel and opposite to each other on the radial sides of the drive gear (43), so that when the drive shaft (41) rotates, the first frame (22) and the second frame (32) slide synchronously in opposite directions.

2. The industrial waste gas filtration and separation equipment according to claim 1, characterized in that, The linkage drive mechanism (4) further includes: an auxiliary transmission shaft (46) arranged perpendicularly to the drive shaft (41); a first bevel gear (47) fixed on the drive shaft (41); a second bevel gear (48) fixed on one end of the auxiliary transmission shaft (46) and meshing with the first bevel gear (47); an auxiliary gear (49) fixed on the other end of the auxiliary transmission shaft (46); and auxiliary racks (50) meshing with the auxiliary gear (49) on the first frame (22) and the second frame (32) to enhance the stability of the frame movement.

3. The industrial waste gas filtration and separation equipment according to claim 1, characterized in that, The mesh diameter of the first filter screen (21) is larger than that of the second filter screen (31), forming a gradient filtration structure from the air inlet (11) to the air outlet (12).

4. The industrial waste gas filtration and separation equipment according to claim 1, characterized in that, It also includes a dust removal component (5), comprising: a first scraper (51), which is disposed on the first frame (22) and closely attached to the windward side of the first filter screen (21); a second scraper (52), which is disposed on the second frame (32) and closely attached to the windward side of the second filter screen (31); a rotating screw (53) is provided in both the first frame (22) and the second frame (32), the rotating screw (53) is threadedly connected to the first scraper (51) and the second scraper (52), and a moving wheel (54) is coaxially fixedly connected to the top end of the rotating screw (53), the moving wheel (54) is slidably connected to the housing (1), and when the first frame (22) and the second frame (32) slide in opposite directions, the first scraper (51) and the second scraper (52) move relative to the corresponding filter screen surface to scrape off the dust attached to the filter screen.

5. The industrial waste gas filtration and separation equipment according to claim 4, characterized in that, The bottom of the box (1) is provided with a dust collection hopper (6), and a closable ash discharge valve (7) is provided below the dust collection hopper (6).

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