Waste gas purification device for air pollution control

Abstract

The invention provides a waste gas purification device for air pollution control, and relates to the field of air control. The waste gas purification device for air pollution control comprises a shell and a filter unit which is arranged in the shell and can rotate relative to the shell, and an air inlet unit which wraps the outer side of the filter unit and enables the filter unit to pass through is arranged in the shell. According to the waste gas purification device for air pollution treatment, clean air enters the temporary storage air box, a back flushing process is that a baffle is opened to leak out of an air return opening, a sealing block is moved under the action of a telescopic sleeve A, and part of the sealing block is overlapped with an air outlet; furthermore, part of clean air can enter the back flushing unit from the air return pipe, air is discharged from the back surface of the filtering unit to perform back flushing on the filtering unit, back flushing dust is discharged from the sewage draining exit, and the effective air exhaust area of the air exhaust pipe is reduced by controlling the sealing block, so that the air velocity can be increased, and the back flushing capability can be improved.

Description

Technical Field

[0001] The present invention relates to the field of air treatment, and particularly to an exhaust gas purification device for air pollution treatment. Background Art

[0002] Exhaust gas purification mainly refers to the work of treating industrial exhaust gases generated in industrial sites, such as dust particles, flue gas soot, odor gases, and toxic and harmful gases. An important process in exhaust gas purification is to filter the particulate matter in the exhaust gas.

[0003] The existing patent (CN117018768A) is a filtering device with a backwashing function, which includes a housing. A partition plate is provided inside the housing, and the partition plate divides the space inside the housing into an upper cavity and a lower cavity. An air inlet is provided at the lower part of the side wall of the lower cavity, and an air outlet pipe is communicated with the upper part of the side wall of the upper cavity. A return air pipe is communicated with the air outlet pipe, and the return air pipe extends into the upper cavity and is communicated with an air collecting box in the upper cavity. The lower end of the air collecting box is communicated with a plurality of backwashing mechanisms. A plurality of filtering mechanisms are rotatably connected to the partition plate. Each backwashing mechanism extends into a corresponding filtering mechanism. Each backwashing mechanism is provided with a backwashing port along the height direction of the filtering mechanism, and the backwashing port of the backwashing mechanism faces the inner side of the filtering mechanism. While the backwashing mechanism continuously blows air out through the backwashing port, the filtering mechanism rotates. This technical solution gives the technical inspiration of backwashing and dust cleaning. However, in this technical solution, an additional fan is required for air diversion. The air first needs to drive the blades to rotate to drive the filtering mechanism to rotate, and then the filtering mechanism can be backwashed, resulting in a reduction in backwashing intensity. At the same time, in this technical solution, a part of the filtered air is diverted from the exhaust by the fan, and the diverted air is limited by the power upper limit of the fan. Setting a larger power fan separately causes waste of energy. Therefore, a filtering device that can actively improve the backwashing effect is needed. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an exhaust gas purification device for air pollution treatment, which solves the problem of low backwashing efficiency mentioned in the above background art.

[0005] To achieve the above object, the present invention is realized by the following technical solutions: An exhaust gas purification device for air pollution control, comprising a housing and a filtering unit that can rotate relative to the housing inside the housing. An air inlet unit is provided inside the housing, which wraps around the outside of the filtering unit and allows the filtering unit to pass through. An air back-blowing unit is provided inside the housing, which also wraps around the outside of the filtering unit and allows the filtering unit to pass through. The inlet end of the air inlet unit is connected and penetrated by an air supply pipe, and the air supply pipe is connected to an existing induced draft fan. Since the induced draft fan needs to make the air flow through the entire exhaust gas purification device, it has a relatively large power and provides a relatively high wind speed. The outlet end of the air inlet unit is connected and penetrated by an exhaust pipe extending outside the housing. The filtering unit passes through the cavity between the air supply pipe and the exhaust pipe. A temporary air storage box is provided outside the housing. One side of the top of the temporary air storage box is provided with a wind gathering hood connected and penetrated with the exhaust pipe. The other side of the top of the temporary air storage box is provided with an air outlet. A sealing block that can seal the air outlet is slidably connected inside the temporary air storage box. A telescopic sleeve A is provided between the sealing block and the temporary air storage box. An air return opening is provided on the side of the temporary air storage box away from the sealing block. A baffle covering the air return opening is slidably connected inside the temporary air storage box. The outside of the air return opening is connected and penetrated by an air return pipe, and the air return pipe penetrates the housing and is connected and penetrated with the air back-blowing unit. The air back-blowing unit is located outside the filtering unit and is connected and penetrated with a sewage discharge port. Inside the air back-blowing unit, a wind gathering plate is provided on the inner side of the filtering unit. The wind gathering plates are symmetrically arranged up and down and have a gap in the middle. The air return pipe is located on the side where the wind gathering plate is installed.

[0006] Preferably, the filtering unit includes chain plates. An installation groove is provided in the middle of the chain plates. The filter element is installed inside the installation groove by screws. A plurality of chain plates together form a chain plate assembly. A driving sprocket for driving the movement of the chain plate assembly is provided on the inner circle of the chain plate assembly, and a tensioning wheel for keeping the chain plate assembly taut is provided. Both the tensioning wheel and the driving sprocket are rotatably connected to the housing.

[0007] Preferably, the chain plate assembly formed by the chain plates is supported by the tensioning wheel and the driving sprocket as a right trapezoid, and the air inlet unit and the air back-blowing unit are respectively located on the long vertical side and the short vertical side.

[0008] Preferably, wrapping sleeves are provided at the inlets and outlets of the filtering unit of the air inlet unit and the air back-blowing unit, and the length of the wrapping sleeves is at least twice the height of the chain plates.

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

[0010] Preferably, an electromagnetic block is fixedly installed inside the temporary air box. Limiting guide rails are fixedly installed on the upper and lower sides of the air return opening inside the temporary air box. The baffle is slidably connected between the limiting guide rails and is driven by the electromagnetic block to slide reciprocally.

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

[0012] Preferably, maintenance openings are provided on both sides of the bottom end of the housing and are covered by sealing plates.

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

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

[0015] 1. For the waste gas purification device for air pollution control, the air supply pipe pumps the air introduced by the induced draft fan into the inside of the air inlet unit and filters it through the filter unit. Dust particles adhere to the outer surface of the filter unit, and the clean air passes through and enters the inside of the temporary air box. During the backwashing process, the baffle is opened to expose the air return opening, and under the action of the telescopic sleeve A, the sealing block moves, so that part of the sealing block overlaps with the air outlet, and then part of the clean air can enter the inside of the backwashing unit from the air return pipe and discharge gas from the reverse side of the filter unit to backwash the filter unit. The backwashed dust is discharged from the sewage outlet. By controlling the sealing block to reduce the effective exhaust area of the exhaust pipe, the air flow rate can be increased to enhance the backwashing ability.

[0016] 2. For the waste gas purification device for air pollution control, the chain plate composed of chain plates is supported by the tensioning wheel and the driving sprocket into a right trapezoid. The air inlet unit and the backwashing unit are respectively located on the long vertical side and the short vertical side. By setting it as a right trapezoid, the number of filter elements that do not participate in filtering and backwashing 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 place, and thus it is more convenient to enter and exit the air inlet unit and the backwashing unit.

[0017] 3. In the waste gas purification device for air pollution control, a partition is provided inside the temporary storage air box. A communication groove is provided between the partition, the air collecting hood and the air outlet. The partition is located above the air return port. 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 through a telescopic sleeve B. An exhaust port is provided on one side of the temporary storage air box away from the air return port. Through such a setting, a double-stage backwashing effect can be formed. When only daily backwashing is required, the piston can be driven to reciprocate through the telescopic sleeve B, so that a part of the air can be discharged from the air return port for backwashing. When continuous cleaning of the device is required, the sealing block needs to be adjusted, making the device more convenient.

[0018] 4. In the waste gas purification device for air pollution control, wrapping sleeves are provided at the inlets and outlets of the filtration units of the air inlet unit and the backwashing unit, which are wrapped around the outside of the filtration units. The length of the wrapping sleeves is at least twice the height of the chain plates. Through such a setting, air leakage from the gaps can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0021] Figure 3 is a schematic view of the air inlet unit of the present invention;

[0022] Figure 4 is a schematic view of the filtration unit of the present invention;

[0023] Figure 5 is a schematic half-sectional view of the backwashing unit of the present invention;

[0024] Figure 6 is a schematic half-sectional view of the temporary storage air box of the present invention;

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

[0026] Figure 8 is the present invention Figure 6 magnified schematic view at A in.

[0027] In the figure: 1. Outer shell; 2. Filter unit; 3. Air inlet unit; 4. Back-blowing unit; 5. Air supply pipe; 6. Exhaust pipe; 7. Sealing plate; 8. Temporary air box; 9. Wind gathering hood; 10. Air outlet; 11. Sealing block; 12. Telescopic sleeve; 13. Air return port; 14. Baffle; 15. Air return pipe; 16. Sewage outlet; 17. Wind gathering plate; 18. Installation groove; 19. Filter element; 20. Screw; 21. Driving sprocket; 22. Tensioning wheel; 23. Wrapping sleeve; 24. Partition board; 25. Connecting groove; 26. Piston; 27. Telescopic sleeve; 28. Exhaust port; 29. Electromagnetic block; 30. Limit guide rail; 31. Maintenance port; 32. Chain plate. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

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

[0030] In the present application, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0031] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0032] Such as Figures 1-8As shown in the figure, an exhaust gas purification device for air pollution control includes a housing 1 and a filtering unit 2 that can rotate relative to the housing 1 inside the housing 1. An air inlet unit 3 that wraps around the outside of the filtering unit 2 and allows the filtering unit 2 to pass through is provided inside the housing 1. An air backwashing unit 4 that wraps around the outside of the filtering unit 2 and allows the filtering unit 2 to pass through is provided inside the housing 1. The inlet end of the air inlet unit 3 is connected and penetrated by an air supply pipe 5, and the outlet end of the air inlet unit 3 is connected and penetrated by an exhaust pipe 6 that extends outside the housing 1. The filtering unit 2 passes through the cavity between the air supply pipe 5 and the exhaust pipe 6. A temporary storage air box 8 is provided outside the housing 1. A wind collecting hood 9 that is connected and penetrated with the exhaust pipe 6 is provided on one side of the top of the temporary storage air box 8. An air outlet 10 is provided on the other side of the top of the temporary storage air box 8. A sealing block 11 that can seal the air outlet 10 is slidably connected inside the temporary storage air box 8. An expansion sleeve A12 is provided between the sealing block 11 and the temporary storage air box 8. An air return opening 13 is provided on the side of the temporary storage air box 8 away from the sealing block 11. A baffle 14 that covers the air return opening 13 is slidably connected inside the temporary storage air box 8. An air return pipe 15 that is connected and penetrated outside the air return opening 13 is provided. The air return pipe 15 penetrates the housing 1 and is connected and penetrated with the air backwashing unit 4. A sewage discharge port 16 is connected and penetrated on the outside of the air backwashing unit 4 where it is located on the inner side of the filtering unit 2. A wind collecting plate 17 is provided inside the air backwashing unit 4 on the inner side of the filtering unit 2. The wind collecting plates 17 are symmetrically arranged up and down and have a gap in the middle. The air return pipe 15 is located on the side where the wind collecting plate 17 is installed. By opening the baffle 14 that covers the air return opening 13 and adjusting the overlapping area between the sealing block 11 and the air outlet 10, the amount of clean gas entering the air return opening 13 can be changed, and thus the cleaning intensity can be adjusted.

[0033] The filtering unit 2 includes chain plates 32. An installation groove 18 is provided in the middle of the chain plates 32. The filter core 19 is installed inside the installation groove 18 by screws 20. A plurality of chain plates 32 together form a chain plate. A driving sprocket 21 for driving the movement of the chain plate and a tensioning wheel 22 for keeping the chain plate taut are provided on the inner circle of the chain plate. Both the tensioning wheel 22 and the driving sprocket 21 are rotatably connected to the housing 1. The chain plate is tensioned by the tensioning wheel 22, and the chain plates 32 are driven to move by the driving sprocket 21. Furthermore, the filter cores 19 of the chain plates 32 can be moved, so that the filtering unit 2 can be switched between filtering and backwashing.

[0034] The chain plate formed by the chain plates 32 is supported by the tensioning wheel 22 and the driving sprocket 21 into a right trapezoid. The air inlet unit 3 and the air backwashing unit 4 are respectively located on the long vertical side and the short vertical side. By setting it as a right trapezoid, the number of filter cores 19 that do not participate in filtering and backwashing can be reduced. At the same time, the right trapezoid can form two parallel sides, so that the chain plates 32 will not bend when moving at this place, and thus it is more convenient to enter and exit the air inlet unit 3 and the air backwashing unit 4.

[0035] At both the inlet and outlet of the filter unit 2 of the air inlet unit 3 and the backwashing unit 4, there is a wrapping sleeve 23 wrapped around the outside of the filter unit 2. The length of the wrapping sleeve 23 is at least twice the height of the chain plate 32. Such a setting can prevent air leakage from the gaps.

[0036] Inside the temporary air box 8, there is a partition plate 24. Between the air gathering hood 9 and the air outlet 10, there is a communication groove 25 provided on the partition plate 24. The partition plate 24 is located above the air return port 13. A piston 26 is slidably connected between the partition plate 24 and the inner bottom wall of the temporary air box 8. The piston 26 is fixedly connected to the temporary air box 8 through a telescopic sleeve B27. An exhaust port 28 is opened on one side of the temporary air box 8 away from the air return port 13. Such a setting can form a two-stage backwashing effect. When only daily backwashing is needed, the piston 26 can be driven to reciprocate through the telescopic sleeve B27, so that a part of the air can be discharged from the air return port 13 for backwashing. And when continuous cleaning of the device is required, the sealing block 11 needs to be adjusted, making the device more convenient.

[0037] An electromagnetic block 29 is fixedly installed inside the temporary air box 8. Inside the temporary air box 8, limiting guide rails 30 are fixedly installed on the upper and lower sides of the air return port 13. The baffle 14 is slidably connected between the limiting guide rails 30. The baffle 14 is driven by the electromagnetic block 29 to reciprocate. Such a setting can facilitate the control of the baffle 14 and thus conveniently open and close the air return port 13.

[0038] The inner diameter of the air supply pipe 5 is the same as the length of the filter element 19. Such a setting can increase the filtration area and ensure the air supply volume at the same time. The cross-sectional shape of the exhaust pipe 6 is "Y" - shaped. The exhaust pipe 6 extends from both sides to the outside of the filter unit 2 of the housing 1 and is connected between the filter unit 2 and the temporary air box 8. Such a setting can increase the ventilation efficiency of the exhaust pipe 6.

[0039] On both sides of the bottom end of the housing 1, there are maintenance openings 31, which are covered by the sealing plates 7. Such a setting can facilitate the replacement of the filter element 19 and the cleaning of the interior.

[0040] The cross-sectional shape of the filter element 19 is "convex" - shaped, and the screws 20 are arranged on the two short sides of the "convex" shape. Such a setting can more conveniently install the filter element 19.

[0041] During use, the air supply duct 5 passes the air pumped by the induced draft fan into the interior of the air inlet unit 3 and filters it through the filter unit 2. Dust particles adhere to the outer surface of the filter unit 2, and the clean air passes through and enters the interior of the temporary air box 8. The backwashing process is to open the baffle 14 to expose the air return port 13. Under the action of the telescopic sleeve A12, the sealing block 11 moves, so that part of the sealing block 11 overlaps with the air outlet 10. As a result, part of the clean air can enter the interior of the backwashing unit 4 from the air return pipe 15, and the gas is discharged from the reverse side of the filter unit 2 to backwash the filter unit 2. The backwashed dust is discharged from the sewage outlet 16. By controlling the sealing block 11, the effective exhaust area of the exhaust pipe 6 is reduced, so that the air flow rate can be increased to enhance the backwashing ability.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0043] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

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

Claims

1. An exhaust gas purification device for air pollution control, comprising a housing (1) and a filtration unit (2) that can rotate relative to the housing (1) inside the housing (1), characterized in that: Inside the housing (1), there is an air inlet unit (3) that wraps around the outside of the filter unit (2) and allows the filter unit (2) to pass through. Inside the housing (1), there is a backwashing unit (4) that wraps around the outside of the filter unit (2) and allows the filter unit (2) to pass through. The inlet end of the air inlet unit (3) is connected and penetrated by an air supply pipe (5). The outlet end of the air inlet unit (3) is connected and penetrated by an exhaust pipe (6) that extends outside the housing (1). The filter unit (2) passes through the cavity between the air supply pipe (5) and the exhaust pipe (6). On the outside of the housing (1), there is a temporary air storage bellows (8). On one side of the top of the temporary air storage bellows (8), there is a wind gathering hood (9) that is connected and penetrated with the exhaust pipe (6). On the other side of the top of the temporary air storage bellows (8), there is an air outlet (10). Inside the temporary air storage bellows (8), there is a sealing block (11) that can slide and seal the air outlet (10). Between the sealing block (11) and the temporary air storage bellows (8), there is a telescopic sleeve A (12). On the side of the temporary air storage bellows (8) away from the sealing block (11), there is an air return opening (13). Inside the temporary air storage bellows (8), there is a baffle (14) that slides and covers the air return opening (13). On the outside of the air return opening (13), there is an air return pipe (15) that is connected and penetrated. The air return pipe (15) penetrates the housing (1) and is connected and penetrated with the backwashing unit (4). The backwashing unit (4) is located on the outside of the filter unit (2) and is connected and penetrated with a sewage discharge port (16). Inside the backwashing unit (4) and on the inner side of the filter unit (2), there is a wind gathering plate (17). The wind gathering plates (17) are symmetrically arranged up and down and have a gap in the middle. The air return pipe (15) is located on the side where the wind gathering plate (17) is installed.

2. The waste gas purification device for air pollution control according to claim 1, characterized in that: The filter unit (2) includes a chain plate (32). In the middle of the chain plate (32), there is an installation groove (18). The filter core (19) is installed inside the installation groove (18) by screws (20). Multiple chain plates (32) together form a chain plate. Inside the inner circle of the chain plate, there is a power sprocket (21) that drives the movement of the chain plate, and a tensioning wheel (22) that keeps the chain plate taut. Both the tensioning wheel (22) and the power sprocket (21) are rotatably connected to the housing (1).

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

4. An exhaust gas purification device for air pollution control according to claim 3, characterized in that: At the inlet and outlet of the filter unit (2) of the air inlet unit (3) and the backwashing unit (4), there is a wrapping sleeve (23) that wraps around the outside of the filter unit (2). The length of the wrapping sleeve (23) is at least twice the height of the chain plate (32).

5. An exhaust gas purification device for air pollution control according to claim 4, characterized in that: A partition plate (24) is arranged inside the temporary air bellows (8). A communication groove (25) is arranged between the partition plate (24) located between the air collecting hood (9) and the air outlet (10). The partition plate (24) is located above the air return opening (13). A piston (26) is slidably connected between the partition plate (24) and the inner bottom wall of the temporary air bellows (8). The piston (26) is fixedly connected to the temporary air bellows (8) through a telescopic sleeve B (27). An exhaust port (28) is arranged on one side of the temporary air bellows (8) away from the air return opening (13).

6. An exhaust gas purification device for air pollution control according to claim 5, characterized in that: An electromagnetic block (29) is fixedly installed inside the temporary air bellows (8). Limiting guide rails (30) are fixedly installed on the upper and lower sides of the air return opening (13) inside the temporary air bellows (8). A baffle plate (14) is slidably connected between the limiting guide rails (30). The baffle plate (14) is driven by the electromagnetic block (29) to slide reciprocally.

7. An exhaust gas 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 element (19). The cross-sectional shape of the exhaust pipe (6) is "Y" shaped. The exhaust pipe (6) extends from both sides to the outside of the filter unit (2) of the housing (1) and is communicated between the filter unit (2) and the temporary air bellows (8).

8. An exhaust gas purification device for air pollution control according to claim 7, characterized in that: Maintenance openings (31) are arranged on both sides of the bottom end of the housing (1). The maintenance openings (31) are covered by sealing plates (7).

9. An exhaust gas purification device for air pollution control according to claim 8, characterized in that: The cross-sectional shape of the filter element (19) is "convex" shaped. Screws (20) are arranged on the two short sides of the "convex" shape.

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