A filter device for waste gas treatment

Abstract

The present invention discloses a filter device for treating waste gas, comprising a filter box, a filter screen, a reeling and unreeling structure and a guide roller; wherein the filter box is provided with a filter cavity, a first mounting cavity and a second mounting cavity, and the filter cavity and the first mounting cavity, as well as the filter cavity and the second mounting cavity, are connected via two spaced-apart through-scraper holes; the two ends of the filter screen are adapted to pass through the two through-scraper holes in a one-to-one correspondence, and the middle part of the filter screen is adapted to pass through the two through-scraper holes in sequence, and the filter screen has a first filter portion, a conducting hole and a second filter portion; the reeling and unreeling structure is arranged in the first mounting cavity and is connected to the two ends of the filter screen; the guide roller is rotatably arranged in the second mounting cavity and the middle part of the filter screen is movably wound around the guide roller; compared with the prior art, when replaced by the reeling and unreeling structure, the dust adhered to the first filter portion or the second filter portion corresponding to the through-scraper holes can enable the filter device for treating waste gas to operate for a long time and with high efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment equipment, and in particular to a filtering device for waste gas treatment. Background Art

[0002] High-dust exhaust gas usually refers to exhaust gas containing a large amount of solid particulate matter (i.e., smoke). These particulate matter is usually generated during industrial production processes, such as combustion processes, metal processing, cement production, chemical production, etc. High-dust exhaust gas needs to be filtered and adsorbed before discharge to reduce the particulate matter content emitted into the atmosphere by the high-dust exhaust gas in order to meet environmental protection requirements.

[0003] CN118594153A discloses a high smoke and dust exhaust gas filtering and adsorption device, including a circular filter barrel, a filter assembly and a cleaning assembly, including a conical circular filter barrel fixedly connected to the lower surface of the circular filter barrel, the lower surface of the circular filter barrel is fixedly connected to a collecting barrel, the inner cavity of the collecting barrel is fixedly connected to a vortex cover through a fixing rod, the outer surface of the circular filter barrel is connected to an exhaust gas inlet pipe, including a special-shaped cover fixedly connected to the middle position of the inner cavity of the circular filter barrel, the inner cavity of the special-shaped cover is fixedly connected to two filter elements, including a circular collecting barrel located in the inner cavity of the special-shaped cover, the circular collecting barrel is fixedly connected to the inner wall of the special-shaped cover through a mounting rod, a plurality of collecting holes are opened on the upper surface of the circular collecting barrel, a plurality of cleaning rods are evenly interspersed in the inner cavity of the circular collecting barrel, and a delivery pipe is connected to the outer surface of the circular collecting barrel.

[0004] In the above-mentioned high-smoke exhaust gas filtering and adsorption device, the buoyancy of water drives the buoyancy ball, elastic rod and elastic ball to impact the filter cloth, knocking off the particulate impurities on the filter cloth, and generating a certain wind speed and kinetic energy through the exhaust gas flow entering the special-shaped cover to impact the bristles to make them swing, thereby removing the particulate matter on the filter net. The removed particulate matter will fall into the circular collecting bucket through the collecting hole and mix with the water. In this process, it is necessary to constantly change the buoyancy of the water and the exhaust gas flow to generate a certain wind speed and kinetic energy in order to clean the particulate matter on the filter net, resulting in the particulate matter on the filter net being difficult to control, and the filtering effect of the filter net is poor during long-term use. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a filter device for waste gas treatment to solve the problem in the prior art that the filter net has poor filtering effect during long-term use.

[0006] To achieve the above object, the present invention adopts the following technical solution: a filter device for waste gas treatment, comprising:

[0007] A filter box, wherein the filter box has a filter cavity, a first mounting cavity and a second mounting cavity, and further has an air inlet and an air outlet communicated with the filter cavity, and the filter cavity and the first mounting cavity as well as the filter cavity and the second mounting cavity are communicated with each other through two spaced-apart scraping holes;

[0008] A filter screen, wherein two ends of the filter screen are adapted to pass through two scraper holes communicating with the first installation cavity in a one-to-one correspondence, and a middle portion of the filter screen is adapted to pass through two scraper holes communicating with the second installation cavity in sequence, and the filter screen has a first filter portion, a conducting hole, and a second filter portion arranged in sequence along its length direction;

[0009] A reeling and unreeling structure, which is disposed in the first installation cavity and connected to both ends of the filter screen, and is used to reel in one end of the filter screen and unreel the other end thereof;

[0010] A guide roller, the guide roller is rotatably arranged in the second installation cavity and the middle part of the filter screen is movably wound around the guide roller;

[0011] During replacement, the retractable and reeling structure is adjusted to arrange the first filter portion and the conducting hole relatively between the air inlet and the air outlet, or the second filter portion and the conducting hole relatively between the air inlet and the air outlet.

[0012] Technical principle:

[0013] When the first filter part and the conducting hole are relatively arranged between the air inlet and the exhaust port, the exhaust gas is introduced into the filter cavity from the air inlet, and the dust in the exhaust gas is filtered through the first filter part. The filtered exhaust gas passes through the conducting hole and enters the exhaust port for discharge. When a large amount of dust adheres to the first filter part, causing the filtering effect of the first filter part to be greatly reduced, the retractable and unreeling structure is adjusted to make the retractable and unreeling structure unreel the second filter part and reel the first filter part. During the reeling process of the first filter part, the dust adhered to the surface of the first filter part is scraped off through the scraping hole and falls to the bottom of the filter cavity. After the adjustment of the retractable and unreeling structure is completed, the second filter part and the conducting hole are relatively arranged between the air inlet and the exhaust port. At this time, the exhaust gas is introduced into the filter cavity from the air inlet, and then passes through the conducting hole, and the dust in the exhaust gas is filtered by the second filter part. The filtered exhaust gas enters the exhaust port for discharge.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The filter device for waste gas treatment cooperates with the winding and unwinding structure and the guide roller to tension the filter screen in the filter chamber to filter the waste gas through the first filter part or the second filter part. When the filtering effect of the first filter part or the second filter part deteriorates, the dust adhering to the first filter part or the second filter part can be replaced by the winding and unwinding structure, which can make the filter device for waste gas treatment operate for a long time and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0017] Figure 2 for Figure 1 A partial cross-sectional view of

[0018] Figure 3 for Figure 1 Schematic diagram of the arrangement of the middle filter when in use;

[0019] Figure 4 for Figure 3 Schematic diagram of the structure of the middle filter;

[0020] Figure 5 for Figure 2 Section view along line AA;

[0021] Figure 6 for Figure 5 A partial enlarged view of part B in the middle.

[0022] The figure marks in the drawings of the specification include: filter box 1, filter cavity 101, first installation cavity 102, second installation cavity 103, filter screen 2, first filter part 201, conducting hole 202, second filter part 203, reeling and unreeling structure 3, reeling roller 301, driver 302, transmission gear 303, guide roller 4, sealing plate 5, top plate assembly 6, top rod 61, adjustment sleeve 62, adjustment rod 63, one-way transmission part 64, one-way bearing 641, drive gear 642, conduction gear 643, movable reset member 65, adjustable transmission part 66, telescope 661, top column 662, adjustment gear 67, limit part 68. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below through specific embodiments:

[0024] like Figure 1-Figure 4As shown, an embodiment of the present invention proposes a filter device for exhaust gas treatment, including a filter box 1, a filter screen 2, a reeling and unreeling structure 3 and a guide roller 4; wherein the filter box 1 has a filter chamber 101, a first installation chamber 102 and a second installation chamber 103, and it also has an air inlet and an exhaust port connected to the filter chamber 101, and the filter chamber 101 and the first installation chamber 102 and the filter chamber 101 and the second installation chamber 103 are connected through two spaced-apart through-scraping holes; the two ends of the filter screen 2 are adapted to pass through the two through-scraping holes connected to the first installation chamber 102, and the middle part of the filter screen 2 is adapted to pass through the through-scraping holes connected to the second installation chamber 103 in sequence. The two scraper holes connected by the cavity 103 pass through the filter 2, and the filter 2 has a first filter part 201, a conducting hole 202 and a second filter part 203 arranged in sequence along its length direction; the reeling and unwinding structure 3 is arranged in the first installation cavity 102 and is connected to both ends of the filter 2, and is used to reel in one end of the filter 2 and unreel the other end; the guide roller 4 is rotatably arranged in the second installation cavity 103 and the middle part of the filter 2 is movably wound on the guide roller 4; when replacing, the reeling and unwinding structure 3 is adjusted to make the first filter part 201 and the conducting hole 202 relatively arranged between the air inlet and the exhaust port, or the second filter part 203 and the conducting hole 202 relatively arranged between the air inlet and the exhaust port.

[0025] In use: when the first filter part 201 and the conducting hole 202 are arranged relatively between the air inlet and the exhaust port, the exhaust gas is introduced into the filter chamber 101 from the air inlet, and the dust in the exhaust gas is filtered through the first filter part 201. The filtered exhaust gas passes through the conducting hole 202 and enters the exhaust port for discharge; when a large amount of dust adheres to the first filter part 201, causing the filtering effect of the first filter part 201 to be greatly reduced, the retractable and unreeling structure 3 is adjusted to make the retractable and unreeling structure 3 unreel the second filter part 203 and the first filter part 203. The filter part 201 is wound up. During the winding process of the first filter part 201, the dust adhered to the surface of the first filter part 201 is scraped off through the scraping holes and falls to the bottom of the filter chamber 101. After the adjustment of the winding and unwinding structure 3 is completed, the second filter part 203 and the conducting hole 202 are relatively arranged between the air inlet and the exhaust port. At this time, the exhaust gas is introduced into the filter chamber 101 from the air inlet, and then passes through the conducting hole 202. The second filter part 203 filters the dust in the exhaust gas, and the filtered exhaust gas enters the exhaust port for discharge.

[0026] The filter device for waste gas treatment cooperates with the reeling structure 3 and the guide roller 4 to tension the filter net 2 in the filter chamber 101 to filter the waste gas through the first filter part 201 or the second filter part 203. When the filtering effect of the first filter part 201 or the second filter part 203 deteriorates, the dust adhering to the first filter part 201 or the second filter part 203 is replaced by the reeling structure 3, which can make the filter device for waste gas treatment operate for a long time and efficiently.

[0027] In this embodiment:

[0028] The filter net 2 includes a first filter part 201 and a second filter part 203. One end of the first filter part 201 and one end of the second filter part 203 are fixedly connected by two parallel and spaced connecting strips. The first filter part 201, the second filter part 203 and the two connecting strips are used to form the conductive hole 202. When the first filter part 201 is used, the first filter part 201 and the conductive hole 202 are arranged opposite to each other and the second filter part 203 is rolled up on the rewinding and unwinding structure 3; when the second filter part 203 is used, the second filter part 203 and the conductive hole 202 are arranged opposite to each other and the first filter part 201 is rolled up on the rewinding and unwinding structure 3.

[0029] Among them, the filter net 2 will be immersed in a solution of a mixture of sodium dilauryl phosphate and ethanol for 3 days during the preparation process, which can reduce the adhesion of dust on the filter net 2 and extend the single use time of the first filter part 201 or the second filter part 203; the mass percentage of sodium dilauryl phosphate in the solution is 20%; at the same time, the air flow rate at the air inlet is controlled to be no more than 1.0m / s. The inventor discovered during use that when the filter 2 is immersed in a solution consisting of a mixture of sodium dilauryl phosphate and ethanol for 3 days during the preparation process and then used, the single use time of the filter 2 can be extended by 1 times; when only the air flow rate at the air inlet is controlled to be no more than 1.0 m / s, the single use time of the filter 2 can be extended by 0.5 times; and when the filter 2 is immersed in a solution consisting of sodium dilauryl phosphate and ethanol for 3 days during the preparation process and the air flow rate at the air inlet is controlled to be no more than 1.0 m / s, the single use time of the filter 2 can be extended by 3 times.

[0030] A scraper block may be installed at the scraper hole to cooperate with the filter screen 2 to improve the ability to scrape dust on the first filter part 201 and the second filter part 203 .

[0031] In order to better understand this solution, the structures such as the reeling and unreeling structure 3 will be optimized below.

[0032] like Figure 2 and Figure 3 As shown, according to another embodiment of the present invention, a filter device for exhaust gas treatment, wherein the reeling and unreeling structure 3 includes two reeling rollers 301 rotatably arranged in the first installation cavity 102, and both ends of the filter net 2 are wound and connected to the two reeling rollers 301 in the same direction, and a driving part is connected between the two reeling rollers 301 to drive them to rotate for reeling or unreeling.

[0033] When the reeling and unreeling structure 3 is adjusted, the driving part specifically causes the two reeling rollers 301 to rotate in the same direction, and cooperates with the arrangement of the two ends of the filter net 2 on the two reeling rollers 301 to make one of the reeling rollers 301 reel up the filter net 2 and the other reeling roller 301 unreel the filter net 2, so that the first filter part 201 or the second filter part 203 is adjusted for use.

[0034] Based on the above scheme:

[0035] The driving unit includes a driver 302 and a transmission gear 303 . There are two transmission gears 303 , which are coaxially connected to the two winding rollers 301 in a one-to-one correspondence. The two transmission gears 303 are meshed and one of the transmission gears 303 is connected to the driver 302 .

[0036] In this embodiment, the driver 302 can be a stepper motor, which drives the transmission gear 303 connected to it to rotate, and the other transmission gear 303 rotates in the opposite direction, so that the two winding rollers 301 rotate in opposite directions. One winding roller 301 unwinds one end of the filter mesh 2 and the other winding roller 301 rewinds the other end of the filter mesh 2, so as to realize the use and replacement between the first filter part 201 and the second filter part 203.

[0037] A reducer may be connected between the driver 302 and the transmission gear 303 connected thereto to adjust the speed of the filter screen 2 during winding and unwinding.

[0038] In order to efficiently and quickly discharge the dust in the filter chamber 101, Figure 2 , Figure 5 as well as Figure 6 As shown, according to another embodiment of the present invention, a filtering device for waste gas treatment, wherein a slag discharge port is opened at the bottom of the filter chamber, a sealing plate 5 for sealing the slag discharge port is rotatably connected to the slag discharge port by rotating a locking piece, a top plate assembly 6 is arranged between the sealing plate 5 and the two transmission gears 303, and the top plate assembly 6 adjusts the sealing plate 5 to close or open the slag discharge port according to the rotation of the two transmission gears 303.

[0039] When the driver 302 is started, during the replacement process between the first filter part 201 and the second filter part 203, the two transmission gears 303 rotate, and the top plate assembly 6 uses the power of the rotation of one of the transmission gears 303 to drive the sealing plate 5 to rotate around the rotating locking piece, the slag discharge port is opened, and the dust in the filter chamber 101 is discharged from the slag discharge port; when the replacement between the first filter part 201 and the second filter part 203 is completed, the driver 302 stops running. At this time, the top plate assembly 6 returns to the initial position, and the sealing plate 5 rotates in the opposite direction under the action of the reset force of the rotating locking piece. The sealing plate 5 closes the slag discharge port again, and the filtering device can continue to work.

[0040] Based on the above scheme:

[0041] The top plate assembly 6 includes a top rod 61, an adjusting sleeve 62 and an adjusting rod 63, wherein one end of the top rod 61 and one end of the sealing plate 5 connected to the rotating locking member are movably abutted against each other; the adjusting sleeve 62 is rotatably arranged in the first mounting cavity 102 and a spiral groove is opened on its inner wall along its length direction, and a one-way transmission part 64 is connected between the adjusting sleeve 62 and the two transmission gears 303; one end of the adjusting rod 63 freely passes through the adjusting sleeve 62 and is connected to the top rod 61 and the other end is connected to a movable reset part 65, a mounting groove is opened on the side wall of the adjusting rod 63, and an adjustable transmission part 66 is arranged in the mounting groove, and the adjustable transmission part 66 has a disengaged state received in the mounting groove or a linkage state sliding against the spiral groove.

[0042] When the first filter part 201 and the second filter part 203 need to be replaced, the driver 302 is started and the adjustable transmission part 66 is adjusted to a linkage state to slide against each other in the spiral groove. The two transmission gears 303 rotate in opposite directions. Only one of the two one-way transmission parts 64 is used for transmission to rotate the adjustment sleeve 62. The adjustment rod 63 is moved on the inner side of the adjustment sleeve 62 toward the sealing plate 5 through the cooperation of the adjustable transmission part 66 and the spiral groove, thereby driving the push rod 61 to move toward the sealing plate 5. The sealing plate 5 is quickly driven to rotate through the cooperation position relationship between the push rod 61 and the sealing plate 5, and the slag discharge port is opened, and the dust in the filter chamber 101 is discharged from the slag discharge port.

[0043] When the replacement between the first filter part 201 and the second filter part 203 is completed, the driver 302 stops and the adjustable transmission part 66 is adjusted to the disengaged state to be stored in the installation groove, and the reset part 65 is moved to move the adjustment rod 63 away from the sealing plate 5 until the top rod 61 is reset. After that, the sealing plate 5 rotates in the opposite direction under the reset force of the rotating locking part, and the sealing plate 5 closes the slag discharge port again.

[0044] In this embodiment:

[0045] The one-way transmission part 64 includes a one-way bearing 641 and a driving gear 642. The inner ring of the one-way bearing 641 is coaxially connected with a transmission gear 643, and the transmission gear 643 is meshed with the corresponding transmission gear 303; the driving gear 642 is fixedly sleeved on the outer ring of the one-way bearing 641 and is also connected to the adjustment sleeve 62.

[0046] When the first filter part 201 is replaced by the second filter part 203, the driver 302 is started to rotate in the reverse direction and the adjustable transmission part 66 is adjusted to the linkage state to slide against the spiral groove. The two transmission gears 303 rotate in opposite directions, which drives the transmission gears 643 in the two one-way transmission parts 64 to rotate in opposite directions; for example, one of the transmission gears 643 rotates forward and the other transmission gear 643 rotates reversely. The transmission gear 643 that rotates forward drives the one-way bearing 641 connected to it to transmit, and the transmission gear 643 that rotates reversely is driven by the one-way bearing 641 connected to it. If the connected one-way bearing 641 is transmitted in one direction, no transmission will be performed; therefore, the one-way bearing 641 connected only by the forward rotating transmission gear 643 drives the adjusting sleeve 62 to rotate through the matching driving gear 642, and the adjusting rod 63 is moved on the inner side of the adjusting sleeve 62 toward the sealing plate 5 through the matching of the adjustable transmission part 66 and the spiral groove, thereby driving the push rod 61 to move toward the sealing plate 5, and the sealing plate 5 is quickly driven to rotate through the matching position relationship between the push rod 61 and the sealing plate 5, so as to open the slag discharge port, and the dust in the filter chamber 101 is discharged from the slag discharge port.

[0047] When the second filter part 203 is replaced by the first filter part 201, the driver 302 is started to rotate forwardly and the adjustable transmission part 66 is adjusted to a linkage state to slide against the spiral groove. The two transmission gears 303 rotate in opposite directions, which drives the transmission gears 643 in the two one-way transmission parts 64 to rotate in opposite directions; for example, one of the transmission gears 643 rotates forwardly and the other transmission gear 643 rotates reversely. The transmission gear 643 that rotates forwardly drives the one-way bearing 641 connected thereto to transmit, and the transmission gear 643 that rotates reversely will not transmit because the one-way bearing 641 connected thereto transmits in one direction (the one-way bearing 641 that transmits here is the same as the one-way bearing 641 that transmits above). 41 is different, the inner ring and the outer ring of the one-way bearing 641 that does not transmit the transmission rotate in opposite directions due to the transmission gear 643 and the driving gear 642 connected thereto, so that no transmission is performed and the transmission will not get stuck); therefore, the one-way bearing 641 connected only by the transmission gear 643 that rotates in the forward direction drives the adjustment sleeve 62 to rotate through the matching driving gear 642, and the adjustment rod 63 is moved on the inner side of the adjustment sleeve 62 toward the sealing plate 5 through the matching of the adjustable transmission part 66 and the spiral groove, thereby driving the push rod 61 to move toward the sealing plate 5, and the sealing plate 5 is quickly driven to rotate through the matching position relationship between the push rod 61 and the sealing plate 5, so that the slag discharge port is opened, and the dust in the filter chamber 101 is discharged from the slag discharge port.

[0048] It should be noted that during the process of replacing the first filter part 201 with the second filter part 203 and during the process of replacing the second filter part 203 with the first filter part 201 , the adjustment sleeve 62 is driven to rotate in the same direction to open the slag discharge port.

[0049] The adjusting sleeve 62 is fixed with an adjusting gear 67, which is meshed with the driving gear 642. The driving gear 642 drives the adjusting sleeve 62 to rotate through the adjusting gear 67, and the adjusting rod 63 moves toward the sealing plate 5 on the inner side of the adjusting sleeve 62 through the cooperation of the adjustable transmission part 66 and the spiral groove, thereby driving the push rod 61 to move toward the sealing plate 5, and the sealing plate 5 is quickly driven to rotate through the cooperation position relationship between the push rod 61 and the sealing plate 5, so as to open the slag discharge port, and the dust in the filter chamber 101 is discharged from the slag discharge port.

[0050] The adjustable transmission part 66 described above includes a retractor 661 and a top column 662. The retractor 661 is arranged in the installation groove and is linked to the driver 302 for control; one end of the top column 662 is connected to the retractor 661 and the other end is received in the installation groove or slidably abuts against the spiral groove.

[0051] The retractor 661 may be a cylinder, and a switch is used to simultaneously control the operation of the cylinder and the driver 302. When the driver 302 is controlled to start rotating by the switch, the cylinder operates to drive the top column 662 to extend into the spiral groove and slide against each other, so that when the adjustment sleeve 62 rotates, the adjustment rod 63 moves. The end of the top column 662 away from the retractor 661 may be a smooth arc surface to perform a good sliding fit with the inner wall of the spiral groove without getting stuck.

[0052] Furthermore, one end of the adjusting rod 63 connected to the movable reset member 65 is formed with a positioning protrusion extending outward thereof, and a limiting portion 68 is fixedly arranged in the first installation cavity 102, and the limiting portion 68 has a limiting notch that abuts against the positioning protrusion after the adjusting rod 63 is reset. In this embodiment, the limiting portion 68 is composed of two "L"-shaped blocks arranged opposite to each other and at intervals, and the notch sides of the two "L"-shaped blocks are arranged toward the adjusting rod 63 to form the limiting notch; when the cylinder is operated to shrink its piston rod, the top column 662 is received in the installation groove and disengaged from the spiral groove, and the movable reset member 65 is used to move the adjusting rod 63 away from the sealing plate 5 to reset until it abuts against the limiting notch, so as to improve the movement accuracy of the adjusting rod 63. Among them, the movable reset member 65 can be a spring connected between the inner wall of the first installation cavity 102 and the adjusting rod 63.

[0053] In order to enable the slag discharge port to be opened quickly and to discharge the dust quickly; the sealing plates 5 have two ends and one end of the two sealing plates 5 is in active contact, and the other ends of the two sealing plates 5 are connected to the slag discharge port through a rotating locking piece. The middle part of the push rod 61 is connected to the adjustment rod 63, and the two ends of the push rod 61 and the ends of the two sealing plates 5 connected to the corresponding rotating locking piece are in a one-to-one correspondence and movably abut against each other. When the adjustment sleeve 62 rotates, the adjustment rod 63 moves toward the sealing plate 5 through the cooperation of the push column 662 and the spiral groove, thereby driving the push rod 61 to move toward the sealing plate 5. The two ends of the push rod 61 are in a one-to-one correspondence with the two sealing plates 5 to drive the two sealing plates 5 to rotate around their respective matching rotating locking pieces, open the slag discharge port, and the dust in the filter chamber 101 is discharged from the slag discharge port. Among them, the rotating locking part is an existing structure, which can be a matching rotating shaft and torsion spring, connected between the inner wall of the slag discharge port and the sealing plate 5, to ensure that the sealing plate 5 stably maintains the sealing of the slag discharge port in the absence of external force; and after the external force disappears, the sealing plate 5 is reset to continue to stably maintain the sealing of the slag discharge port; the push rod 61 is "U" shaped.

[0054] A first flow meter may be installed on the air inlet side of the filter box 1, and a second flow meter may be installed on the air outlet side of the filter box 1. When the controller detects that the flow rate detected by the second flow meter is a preset value of the flow rate detected by the first flow meter, the controller controls the driver 302 to start. For example, the preset value is 50%, and this preset value can be adjusted according to actual conditions.

[0055] When using this solution:

[0056] When the controller detects that the flow detected by the second flow meter is a preset value of the flow detected by the first flow meter, and the first filter part 201 is replaced by the second filter part 203, the controller controls the driver 302 to start and rotate in the opposite direction, one of the winding rollers 301 winds up the first filter part 201, and the other winding roller 301 unwinds the second filter part 203, and the dust adhered to the surface of the first filter part 201 is scraped off onto the sealing plate 5 through the corresponding scraping holes; when the driver 302 is started, the telescopic device 661 is also started to drive the top column 662 to slide against the spiral groove, and one of the one-way transmission parts 64 is transmitted to drive the adjustment sleeve 62 to rotate in the opposite direction, and the adjustment rod 63 moves toward the sealing plate 5, driving the top rod 61 to move toward the sealing plate 5. , the two ends of the push rod 61 are against the two sealing plates 5 one by one, to drive the two sealing plates 5 to rotate around their respective matching rotating locking pieces, open the slag discharge port, and the dust in the filter chamber 101 is discharged from the slag discharge port; after the replacement is completed, the driver 302 stops running, and the telescopic device 661 drives the push column 662 to shrink in the installation groove. At this time, the spring causes the adjusting rod 63 to drive the push rod 61 to move in the opposite direction to reset, until one end of the adjusting rod 63 is against the limiting notch, and the two sealing plates 5 are reversely rotated and reset under the action of their respective matching rotating locking pieces to close the slag discharge port; at the same time, the replacement is also completed, and the exhaust gas can be introduced into the filter chamber 101 from the air inlet, through the conducting hole 202, and the dust in the exhaust gas is filtered by the second filter unit 203, and the filtered exhaust gas enters the exhaust port for discharge.

[0057] When the controller detects that the flow detected by the second flow meter is a preset value of the flow detected by the first flow meter, and the first filter part 201 is replaced by the second filter part 203, the controller controls the driver 302 to start and rotate forward, one of the winding rollers 301 winds up the first filter part 201, and the other winding roller 301 unwinds the second filter part 203, and the dust adhered to the surface of the second filter part 203 is scraped off onto the sealing plate 5 through the corresponding scraping holes; when the driver 302 is started, the telescopic device 661 is also started to drive the top column 662 to slide against the spiral groove, and the other one-way transmission part 64 is transmitted to drive the adjustment sleeve 62 to rotate in the opposite direction, and the adjustment rod 63 moves toward the sealing plate 5, driving the top rod 61 toward the sealing plate 5. The two ends of the push rod 61 are pressed against the two sealing plates 5 one by one to drive the two sealing plates 5 to rotate around their respective matching rotating locking pieces, open the slag discharge port, and discharge the dust in the filter chamber 101 from the slag discharge port; after the replacement is completed, the driver 302 stops running, and the telescopic device 661 drives the push column 662 to shrink in the installation groove. At this time, the spring causes the adjusting rod 63 to drive the push rod 61 to move in the opposite direction to reset, until one end of the adjusting rod 63 is pressed against the limiting notch, and the two sealing plates 5 are reversely rotated and reset under the action of their respective matching rotating locking pieces to close the slag discharge port; at the same time, the replacement is also completed, and the exhaust gas can be introduced into the filter chamber 101 from the air inlet, and the dust in the exhaust gas is filtered through the first filter part 201, and then passes through the conducting hole 202 to enter the exhaust port for discharge.

[0058] It needs to be further explained that: the first installation cavity 102 is divided by a first partition to form an upper chamber and a lower chamber arranged in an upper and lower manner, and the lower chamber is divided by a second partition to form a front chamber and a rear chamber distributed front to back, the front chamber is located between the rear chamber and the filter cavity 101, the two conduction gears 643 and the two transmission gears 303 are arranged in the upper chamber, the top rod 61, the adjustment sleeve 62 and the adjustment rod 63 are arranged in the rear chamber, and the winding roller 301 is arranged in the front chamber.

[0059] 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 filter device for waste gas treatment, characterized in that: include: A filter box, wherein the filter box has a filter cavity, a first mounting cavity and a second mounting cavity, and further has an air inlet and an air outlet communicated with the filter cavity, and the filter cavity and the first mounting cavity as well as the filter cavity and the second mounting cavity are communicated with each other through two spaced-apart scraping holes; A filter screen, wherein two ends of the filter screen are adapted to pass through two scraper holes communicating with the first installation cavity in a one-to-one correspondence, and a middle portion of the filter screen is adapted to pass through two scraper holes communicating with the second installation cavity in sequence, and the filter screen has a first filter portion, a conducting hole, and a second filter portion arranged in sequence along its length direction; A reeling and unreeling structure, which is disposed in the first installation cavity and connected to both ends of the filter screen, and is used to reel in one end of the filter screen and unreel the other end thereof; A guide roller, the guide roller is rotatably arranged in the second installation cavity and the middle part of the filter screen is movably wound around the guide roller; When replacing, the retractable and reeling structure is adjusted so that the first filter part and the conducting hole are relatively arranged between the air inlet and the air outlet, or the second filter part and the conducting hole are relatively arranged between the air inlet and the air outlet; The reeling and unreeling structure comprises two reeling rollers rotatably arranged in the first mounting cavity, the two ends of the filter screen are connected to the two reeling rollers in the same direction, and a driving part is connected between the two reeling rollers to drive them to rotate for reeling or unreeling; The driving unit comprises: Driver; There are two transmission gears, which are coaxially connected to the two winding rollers in a one-to-one correspondence, the two transmission gears are meshed and one of the transmission gears is connected to the driver; A slag discharge port is provided at the bottom of the filter chamber, and a sealing plate is rotatably connected to the slag discharge port through a rotating locking piece. A top plate assembly is provided between the sealing plate and the two transmission gears. The top plate assembly adjusts the sealing plate to close or open the slag discharge port according to the rotation of the two transmission gears.

2. A filter device for waste gas treatment according to claim 1, characterized in that: The top plate assembly comprises: A push rod, one end of which movably abuts against an end of the sealing plate connected to the rotating locking member; An adjusting sleeve, which is rotatably arranged in the first mounting cavity and has an inner wall with a spiral groove along its length direction, and a one-way transmission part is connected between the adjusting sleeve and the two transmission gears; An adjusting rod, one end of which freely passes through the adjusting sleeve and is connected to the top rod, and the other end of which is connected to a movable reset member. A mounting groove is opened on the side wall of the adjusting rod, and an adjustable transmission part is arranged in the mounting groove. The adjustable transmission part has a disengaged state received in the mounting groove or a linkage state in which it slides against the spiral groove.

3. A filter device for waste gas treatment according to claim 2, characterized in that: Each of the one-way transmission parts comprises: A one-way bearing, wherein the inner ring of the one-way bearing is coaxially connected with a transmission gear, and the transmission gear is meshed with a corresponding transmission gear; A driving gear, wherein the driving gear fixing sleeve is arranged on the outer ring of the one-way bearing and the driving gear is also connected with the adjusting sleeve.

4. A filter device for waste gas treatment according to claim 3, characterized in that: The fixing sleeve on the adjusting sleeve is provided with an adjusting gear, and the adjusting gear is meshed with the driving gear.

5. The filter device for waste gas treatment according to claim 2, characterized in that: The adjustable transmission part comprises: An expander, which is arranged in the mounting slot and is linked with the driver for control; A top column, one end of which is connected to the telescoping device and the other end of which is received in the mounting groove or slidably abuts against the spiral groove.

6. The filter device for waste gas treatment according to claim 2, characterized in that: A positioning protrusion extending outward is formed at one end of the adjusting rod connected to the movable reset member, and a limiting portion is fixedly arranged in the first installation cavity, and the limiting portion has a limiting notch that abuts against the positioning protrusion after the adjusting rod is reset.

7. The filter device for waste gas treatment according to claim 2, characterized in that: There are two sealing plates and one end of the two sealing plates is in movable contact, and the other ends of the two sealing plates are connected to the slag discharge port through a rotating locking piece. The middle part of the push rod is connected to the adjusting rod, and the two ends of the push rod and the ends of the two sealing plates connected to the corresponding rotating locking pieces are movably opposed to each other.

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