A waste gas purification device for air pollution control

Abstract

The application provides a waste gas purification device for air pollution treatment, and relates to the field of air treatment. The waste gas purification device for air pollution treatment comprises a shell and a filter unit capable of rotating relative to the shell inside the shell, and the inside of the shell is provided with an air inlet unit wrapped outside the filter unit and capable of allowing the filter unit to pass. The waste gas purification device for air pollution treatment is characterized in that clean air enters the inside of the temporary storage air bellow, the back blowing process is to open the baffle to leak out the air return port, the sealing block is moved under the action of the telescopic sleeve A, part of the sealing block overlaps with the air outlet, and then part of the clean air can enter the inside of the back blowing unit from the air return pipe, the filter unit is back blown by the gas discharged from the opposite side of the filter unit, the dust back blown is discharged from the exhaust port, and the effective air discharge area of the air discharge pipe is reduced by controlling the sealing block, so that the air flow rate is increased and the back blowing capacity is increased.

Description

Technical Field

[0001] This invention relates to the field of air pollution control, specifically to a waste gas purification device for air pollution control. Background Technology

[0002] Waste gas purification mainly refers to the treatment of industrial waste gases generated in industrial sites, such as particulate matter, flue gas, odorous gases, and toxic and harmful gases. A crucial step in waste gas purification is filtering particulate matter from the waste gas.

[0003] Existing patent (CN117018768A) discloses a filter device with a backflushing function, comprising a housing, with a partition plate inside the housing dividing the internal space into an upper chamber and a lower chamber. An air inlet is provided on the lower side wall of the lower chamber, and an air outlet pipe is connected to the upper side wall of the upper chamber. A return air pipe is connected to the air outlet pipe and extends into the upper chamber, connecting to an air collection box in the upper chamber. Multiple backflushing mechanisms are connected to the lower end of the air collection box. Multiple filter mechanisms are rotatably connected to the partition plate, with each backflushing mechanism extending into a corresponding filter mechanism. Each backflushing mechanism has a backflushing port along the height direction of the filter mechanism, and the backflushing port of the backflushing mechanism faces the inner side of the filter mechanism. The backflushing mechanism continuously blows air outward through the backflushing port while rotating the filter mechanism. The technical solution provides inspiration for backflushing cleaning, but it requires an additional fan for airflow. The air first needs to drive the blades to rotate, which in turn rotates the filter mechanism, before it can backflush the filter mechanism, reducing the backflushing force. In addition, the solution uses a fan to draw some filtered air from the exhaust, but the amount of air drawn is limited by the fan's power limit. Setting up a separate, larger-power fan would result in energy waste. Therefore, a filter device that can actively improve the backflushing effect is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a waste gas purification device for air pollution control, which solves the problem of low backflushing efficiency mentioned in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a waste gas purification device for air pollution control, comprising a housing and a filter unit rotatable relative to the housing. An air inlet unit is disposed inside the housing, enclosing the filter unit and allowing air to pass through. A backflushing unit is also disposed inside the housing, enclosing the filter unit and allowing air to pass through. An air supply pipe is connected to and extends through the inlet end of the air inlet unit. The air supply pipe is connected to an existing induced draft fan. The induced draft fan needs to circulate air throughout the waste gas purification device, therefore it has high power and provides a high air velocity. An exhaust pipe extending to the outside of the housing is connected to and extends through the outlet end of the air inlet unit. The filter unit passes through a cavity between the air supply pipe and the exhaust pipe. A temporary storage air box is installed on the outer side of the outer casing. A wind-gathering hood is installed on one side of the top of the temporary storage air box, which is connected to and runs through the exhaust pipe. An air outlet is installed on the other side of the top of the temporary storage air box. A sealing block that can seal the air outlet is slidably connected inside the temporary storage air box. A telescopic sleeve A is installed between the sealing block and the temporary storage air box. A return air port is opened on the side of the temporary storage air box away from the sealing block. A baffle covering the return air port is slidably connected inside the temporary storage air box. A return air pipe is connected to and runs through the outer side of the return air port. The return air pipe runs through the outer casing and is connected to and runs through the back-blowing unit. The back-blowing unit is located outside the filter unit and is connected to and runs through the drain port. An air-gathering plate is installed inside the back-blowing unit, which is the inner side of the filter unit. The air-gathering plates are symmetrically arranged at the top and bottom with a gap in the middle. The return air pipe is located on the side where the air-gathering plate is installed.

[0006] Preferably, the filter unit includes a chain plate with a mounting groove in the middle. The filter element is installed inside the mounting groove by screws. Multiple chain plates together form a chain plate. The inner ring of the chain plate is provided with a power sprocket for driving the chain plate to move and a tensioning wheel for keeping the chain plate taut. Both the tensioning wheel and the power sprocket are rotatably connected to the outer shell.

[0007] Preferably, the chain plate composed of the chain plates is supported by the tension wheel and the power sprocket in a right-angled trapezoidal shape, and the air inlet unit and the back-blowing unit are located on the long vertical side and the short vertical side, respectively.

[0008] Preferably, the inlet and outlet of the filter unit of the air inlet unit and the backflushing unit are provided with a cover sleeve that wraps around the outside of the filter unit, and the length of the cover sleeve is at least twice the height of the chain plate.

[0009] Preferably, the interior of the temporary storage air box is provided with a partition, and a connecting groove is provided between the partition and the air outlet. The partition is located above the return air outlet. A piston is slidably connected between the partition and the inner bottom wall of the temporary storage air box. The piston is fixedly connected to the temporary storage air box by a telescopic sleeve B. An exhaust port is opened on the side of the temporary storage air box away from the return air outlet.

[0010] Preferably, an electromagnetic block is fixedly installed inside the temporary storage air box, and limit guide rails are fixedly installed on the upper and lower sides of the return air inlet inside the temporary storage air box. A baffle is slidably connected between the limit guide rails, and the baffle is driven by the electromagnetic block to slide back and forth.

[0011] Preferably, the inner diameter of the air supply duct is the same as the length of the filter element, the cross-sectional shape of the exhaust duct is "Y", the exhaust duct extends from both sides to the outside of the filter unit of the housing, and connects between the filter unit and the temporary storage air box.

[0012] Preferably, the bottom two sides of the outer casing are provided with inspection ports, which are covered by sealing plates.

[0013] Preferably, the cross-sectional shape of the filter element is "convex", and the screws are located on the two short sides of the "convex" shape.

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

[0015] 1. This waste gas purification device for air pollution control uses an air supply duct to pump air from an induced draft fan into the air intake unit, where it is filtered by a filter unit. Dust particles adhere to the outer surface of the filter unit, while clean air passes through and enters the interior of a temporary storage air box. The backflushing process involves opening a baffle to expose a return air inlet. Under the action of the telescopic sleeve A, the sealing block moves, causing part of the sealing block to overlap with the air outlet. This allows some clean air to enter the backflushing unit from the return air duct, and the air discharged from the back of the filter unit backflushes the filter unit. The dust from the backflushing is discharged from the drain outlet. By controlling the sealing block to reduce the effective exhaust area of ​​the exhaust duct, the airflow velocity can be increased, thereby enhancing the backflushing capability.

[0016] 2. The exhaust gas purification device for air pollution control has a chain plate composed of chain plates supported by a tension wheel and a power sprocket in the shape of a right trapezoid. The air inlet unit and the back-blowing unit are located on the long vertical side and the short vertical side, respectively. By setting it as a right trapezoid, the number of filter elements that do not participate in filtration and back-blowing can be reduced. At the same time, the right trapezoid can form two parallel sides, so that the chain plate will not bend when moving at this point, thus making it easier to enter and exit the air inlet unit and the back-blowing unit.

[0017] 3. The exhaust gas purification device for air pollution control has a partition inside the temporary storage air box. A connecting groove is provided between the partition and the air outlet. The partition is located above the return air outlet. A piston is slidably connected between the partition and the inner bottom wall of the temporary storage air box. The piston is fixedly connected to the temporary storage air box by a telescopic sleeve B. An exhaust port is opened on the side of the temporary storage air box away from the return air outlet. This configuration can form a dual-stage backflushing effect. For routine backflushing, the piston can be moved back and forth by the telescopic sleeve B to discharge some air from the return air outlet for backflushing. When continuous cleaning of the device is required, the sealing block needs to be adjusted, making the device more convenient.

[0018] 4. The exhaust gas purification device for air pollution control has a cover on the outside of the filter unit of the air inlet unit and the filter unit of the backflushing unit. The length of the cover is at least twice the height of the chain plate. This setting can prevent air leakage from the gaps. Attached Figure Description

[0019] Figure 1 This is a half-sectional schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the outer shell of the present invention;

[0021] Figure 3 This is a schematic diagram of the air intake unit of the present invention;

[0022] Figure 4 This is a schematic diagram of the filtering unit of the present invention;

[0023] Figure 5 This is a half-sectional schematic diagram of the backflush unit of the present invention;

[0024] Figure 6 This is a half-sectional schematic diagram of the temporary storage bellows of the present invention;

[0025] Figure 7 This is a half-sectional schematic diagram of the chain plate of the present invention;

[0026] Figure 8 For the present invention Figure 6 Enlarged diagram of point A in the middle.

[0027] In the diagram: 1. Outer shell; 2. Filter unit; 3. Air inlet unit; 4. Backflush unit; 5. Air supply duct; 6. Air exhaust duct; 7. Sealing plate; 8. Temporary storage air box; 9. Air collector hood; 10. Air outlet; 11. Sealing block; 12. Telescopic sleeve; 13. Return air outlet; 14. Baffle; 15. Return air duct; 16. Drain outlet; 17. Air collector plate; 18. Mounting groove; 19. Filter element; 20. Screw; 21. Drive sprocket; 22. Tensioner wheel; 23. Enclosure sleeve; 24. Partition plate; 25. Connecting groove; 26. Piston; 27. Telescopic sleeve; 28. Exhaust port; 29. ​​Electromagnetic block; 30. Limiting guide rail; 31. Inspection port; 32. Chain plate. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0032] like Figure 1-8As shown, a waste gas purification device for air pollution control includes a housing 1 and a filter unit 2 that can rotate relative to the housing 1 inside the housing 1. An air inlet unit 3 is disposed inside the housing 1, enclosing the filter unit 2 and allowing it to pass through. A backflushing unit 4 is also disposed inside the housing 1, enclosing the filter unit 2 and allowing it to pass through. An air supply pipe 5 is connected to and passes through the inlet end of the air inlet unit 3, and an exhaust pipe 6 extends to the outside of the housing 1, passing through the cavity between the air supply pipe 5 and the exhaust pipe 6. A temporary air storage box 8 is disposed on the outside of the housing 1. An air collection hood 9, connected to and passing through the exhaust pipe 6, is disposed on one side of the top of the temporary air storage box 8. An air outlet 10 is provided on the other side. A sealing block 11 that can seal the air outlet 10 is slidably connected inside the temporary storage air box 8. A telescopic sleeve A12 is provided between the sealing block 11 and the temporary storage air box 8. A return air port 13 is opened on the side of the temporary storage air box 8 away from the sealing block 11. A baffle 14 covering the return air port 13 is slidably connected inside the temporary storage air box 8. A return air pipe 15 is connected and passes through the outside of the return air port 13. The return air pipe 15 passes through the outer shell 1 and is connected and passes through the back-blowing unit 4. The back-blowing unit 4 is located outside the filter unit 2 and is connected and passes through the drain port 16. An air-gathering plate 17 is provided inside the back-blowing unit 4, which is the inside of the filter unit 2. The air-gathering plates 17 are symmetrically arranged on the top and bottom and have a gap in the middle. The return air pipe 15 is located on the side where the air-gathering plate 17 is installed. By opening the baffle 14 covering the return air inlet 13 and adjusting the overlapping area of ​​the sealing block 11 and the air outlet 10, the amount of clean gas entering the return air inlet 13 can be changed, thereby adjusting the cleaning intensity.

[0033] The filter unit 2 includes a chain plate 32, with a mounting groove 18 in the middle of the chain plate 32. The filter element 19 is installed inside the mounting groove 18 by screws 20. Multiple chain plates 32 together form a chain plate. The inner ring of the chain plate is provided with a power sprocket 21 for driving the chain plate to move, and a tensioning wheel 22 for keeping the chain plate tensioned. Both the tensioning wheel 22 and the power sprocket 21 are rotatably connected to the outer shell 1. The chain plate is tensioned by the tensioning wheel 22, and the chain plate 32 is driven to move by the power sprocket 21, thereby enabling the filter element 19 of the chain plate 32 to move, thus allowing switching between filtration and backflushing.

[0034] The chain plate composed of chain plates 32 is supported by tension wheel 22 and drive sprocket 21 in a right-angled trapezoidal shape. The air inlet unit 3 and the back-blowing unit 4 are located on the long vertical side and the short vertical side, respectively. By setting it as a right-angled trapezoid, the number of filter elements 19 that do not participate in filtration and back-blowing can be reduced. At the same time, the right-angled trapezoid can form two parallel sides, so that the chain plate 32 will not bend when moving at this point, thus making it easier to enter and exit the air inlet unit 3 and the back-blowing unit 4.

[0035] The inlet and outlet of the filter unit 2 of the air inlet unit 3 and the back-blowing unit 4 are both equipped with a cover 23 that wraps around the outside of the filter unit 2. The length of the cover 23 is at least twice the height of the chain plate 32. This arrangement can prevent air leakage from the gaps.

[0036] The temporary storage air box 8 has a partition 24 inside. The partition 24 is located between the air collecting hood 9 and the air outlet 10 and has a connecting groove 25. The partition 24 is located above the return air outlet 13. A piston 26 is slidably connected between the partition 24 and the inner bottom wall of the temporary storage air box 8. The piston 26 is fixedly connected to the temporary storage air box 8 by a telescopic sleeve B27. An exhaust port 28 is opened on the side of the temporary storage air box 8 away from the return air outlet 13. This configuration can form a dual-stage back-blowing effect. When it is just a daily back-blowing, the piston 26 can be moved back and forth by the telescopic sleeve B27, so that a part of the air can be discharged from the return air outlet 13 for back-blowing. When it is necessary to continuously clean the device, the sealing block 11 needs to be adjusted, which makes the device more convenient.

[0037] An electromagnetic block 29 is fixedly installed inside the temporary storage air box 8. Limiting guide rails 30 are fixedly installed on the upper and lower sides of the return air vent 13 inside the temporary storage air box 8. The baffle 14 is slidably connected between the limiting guide rails 30. The baffle 14 is driven by the electromagnetic block 29 to slide back and forth. This setting makes it easy to control the baffle 14 and thus conveniently open and close the return air vent 13.

[0038] The inner diameter of the air supply duct 5 is the same as the length of the filter element 19. This arrangement increases the filtration area while ensuring the air supply volume. The cross-sectional shape of the exhaust duct 6 is "Y". The exhaust duct 6 extends from both sides to the outside of the filter unit 2 of the outer shell 1 and connects between the filter unit 2 and the temporary air box 8. This arrangement increases the ventilation efficiency of the exhaust duct 6.

[0039] The bottom of the outer casing 1 has two access ports 31, which are covered by a sealing plate 7. This arrangement makes it easy to replace the filter element 19 and clean the inside.

[0040] The filter element 19 has a "convex" cross-sectional shape, and the screws 20 are located on the two short sides of the "convex" shape. This arrangement makes it easier to install the filter element 19.

[0041] During use, the air supply duct 5 introduces the air pumped in by the induced draft fan into the air intake unit 3 and filters it through the filter unit 2. Dust particles adhere to the outer surface of the filter unit 2, and clean air passes through and enters the interior of the temporary storage air box 8. The back-blowing process involves opening the baffle 14 to expose the return air port 13. Under the action of the telescopic sleeve A12, the sealing block 11 moves, causing part of the sealing block 11 to overlap with the air outlet 10. This allows some clean air to enter the interior of the back-blowing unit 4 from the return air duct 15. The gas discharged from the back of the filter unit 2 back-blown the filter unit 2, and the dust back-blown out is discharged from the drain port 16. By controlling the sealing block 11 to reduce the effective exhaust area of ​​the exhaust duct 6, the air velocity can be increased, thereby increasing the back-blowing capacity.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0043] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste gas purification device for air pollution control, comprising a housing (1) and a filter unit (2) inside the housing (1) which can rotate relative to the housing (1), characterized in that: The inside of the shell (1) is provided with an air inlet unit (3) wrapped outside the filter unit (2) and capable of passing the filter unit (2), the inside of the shell (1) is provided with a back flushing unit (4) wrapped outside the filter unit (2) and passing the filter unit (2), the inlet end of the air inlet unit (3) is connected and penetrated by the air supply pipe (5), the outlet end of the air inlet unit (3) is connected and penetrated by the exhaust pipe (6) extending to the outside of the shell (1), the filter unit (2) passes through the cavity between the air supply pipe (5) and the exhaust pipe (6); The outside of the shell (1) is provided with a temporary storage air tank (8), the top end of the temporary storage air tank (8) is provided with a wind cover (9) connected and penetrated by the exhaust pipe (6), the other side of the top end of the temporary storage air tank (8) is provided with an air outlet (10), the inside of the temporary storage air tank (8) is slidably connected with a sealing block (11) capable of sealing the air outlet (10), a telescopic sleeve A (12) is arranged between the sealing block (11) and the temporary storage air tank (8), the temporary storage air tank (8) is provided with a return air outlet (13) away from the sealing block (11), the inside of the temporary storage air tank (8) is slidably connected with a baffle (14) covering the return air outlet (13); The outside of the return air outlet (13) is connected and penetrated by the return air pipe (15), the return air pipe (15) penetrates the shell (1) and is connected and penetrated by the back flushing unit (4), the back flushing unit (4) is connected and penetrated by the exhaust port (16) outside the filter unit (2), the inside of the back flushing unit (4) is provided with a wind board (17) for the inside of the filter unit (2), the wind board (17) is symmetrically arranged up and down and provided with a gap in the middle, the return air pipe (15) is located on one side of the installation of the wind board (17).

2. The exhaust purification device for air pollution control according to claim 1, characterized in that: The filter unit (2) comprises a chain plate (32), the middle of the chain plate (32) is provided with a mounting groove (18), the filter core (19) is mounted in the inside of the mounting groove (18) by a screw (20), a plurality of chain plates (32) jointly constitute a chain plate, the inner circle of the chain plate is provided with a power sprocket (21) for driving the chain plate to move, and a tensioning wheel (22) for keeping the chain plate tensioned, the tensioning wheel (22) and the power sprocket (21) are rotatably connected with the shell (1).

3. The exhaust purification device for air pollution control according to claim 2, characterized in that: The chain plate (32) is supported by the tensioning wheel (22) and the power sprocket (21) to be a right trapezoid, the air inlet unit (3) and the back flushing unit (4) are respectively located on the long vertical side and the short vertical side.

4. The exhaust purification device for air pollution control according to claim 3, characterized in that: The filter unit (2) inlet and outlet of the air inlet unit (3) and the back flushing unit (4) are provided with a wrapping sleeve (23) wrapped outside the filter unit (2), the length of the wrapping sleeve (23) is at least twice the height of the chain plate (32).

5. The exhaust purification device for air pollution control according to claim 4, characterized in that: The inside of the temporary storage air box (8) is provided with a partition (24), a communication groove (25) is arranged between the air cover (9) and the air outlet (10), the partition (24) is located above the air return port (13), a piston (26) is slidably connected between the partition (24) and the inner bottom wall of the temporary storage air box (8), the piston (26) is fixedly connected with the temporary storage air box (8) through an extension sleeve B (27), and an exhaust port (28) is arranged on the side of the temporary storage air box (8) away from the air return port (13).

6. The exhaust purification device for air pollution control according to claim 5, characterized in that: The inside of the temporary storage air box (8) is fixedly provided with an electromagnetic block (29), and the inside of the temporary storage air box (8) is fixedly provided with a limiting guide rail (30) on the upper and lower sides of the air return port (13), the baffle (14) is slidably connected between the limiting guide rails (30), and the baffle (14) is driven by the electromagnetic block (29) to reciprocate.

7. The exhaust purification device for air pollution control according to claim 6, characterized in that: The inner diameter of the air supply pipe (5) is the same as the length of the filter core (19), the cross section of the air exhaust pipe (6) is "Y" type, the air exhaust pipe (6) extends from both sides to the outside of the filter unit (2) of the shell (1), and communicates between the filter unit (2) and the temporary storage air box (8).

8. The exhaust purification device for air pollution control according to claim 7, characterized in that: The bottom end of the shell (1) is provided with an access hole (31) on both sides, and the access hole (31) is covered by a sealing plate (7).

9. The exhaust purification device for air pollution control according to claim 8, characterized in that: The cross section of the filter core (19) is "convex" type, and the screws (20) are arranged on both short sides of the "convex" type.

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