A boiler fly ash collection device

Abstract

This utility model provides a boiler fly ash collection device, including a housing and an end cap fixed to the top opening of the housing. An air inlet is provided on the lower part of the side wall of the housing, and an air outlet is provided on the end cap. A filter screen capable of longitudinal reciprocating movement is horizontally inserted inside the housing. The filter screen has a downwardly concave arc-shaped portion in the middle, with multiple filter holes evenly distributed on the arc-shaped portion. The filter screen is positioned higher than the air inlet. A cleaning brush capable of rotating along the lower surface of the arc-shaped portion is also provided at the bottom of the arc-shaped portion inside the housing. The advantages of this utility model are: the device can effectively separate fly ash from flue gas, thereby effectively reducing fly ash emissions into the external environment; and the reciprocating filter screen and cleaning brush effectively prevent fly ash from clogging the filter screen.

Description

Technical Field

[0001] This utility model belongs to the field of boiler fly ash treatment technology, and in particular relates to a boiler fly ash collection device. Background Technology

[0002] Boiler combustion generates a large amount of fly ash, which, if directly emitted, causes dust pollution. Existing fly ash collection devices mostly use electrostatic precipitators or bag filters, which suffer from low collection efficiency and are prone to clogging. In addition, traditional devices lack effective control over secondary dust generation during the collection process, further reducing collection efficiency and exacerbating environmental pollution. Utility Model Content

[0003] In view of this, the present invention aims to overcome the shortcomings of the above-mentioned problems in the prior art and proposes a boiler fly ash collection device.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A boiler fly ash collection device includes a box and an end cap fixed to the top opening of the box. An air inlet is provided on the lower part of the side wall of the box, and an air outlet is provided on the end cap. A filter screen that can move longitudinally back and forth is horizontally inserted inside the box. The middle of the filter screen is set with a downwardly concave arc-shaped part. Multiple filter holes are evenly opened on the arc-shaped part. The filter screen is positioned higher than the air inlet. Inside the box, at the bottom of the arc-shaped part of the filter screen, a cleaning brush that can rotate along the lower surface of the arc-shaped part is also provided.

[0006] Furthermore, the filter screen also includes connecting parts horizontally arranged on both sides of the arc-shaped part. On the inner wall of the box, there are strip-shaped movable grooves at the corresponding two connecting parts. The connecting parts are inserted into the corresponding movable grooves, and the width of the movable grooves is greater than the thickness of the connecting parts. Inside the box, there are rotating shafts horizontally arranged below the two connecting parts. Each shaft is fixed with multiple cams, and the cams are in contact with the bottom of the corresponding connecting parts.

[0007] Furthermore, a connecting shaft that can rotate along the central axis is connected to the rear side wall of the housing, and the front end of the connecting shaft extends into the housing. A connecting ring located inside the housing is fixed to the connecting shaft, and an L-shaped connecting rod is fixed to the lower side of the connecting ring. A gap is provided between the filter screen and the rear side wall of the housing. The vertical section of the connecting rod passes through the gap, and the horizontal section of the connecting rod is located below the arc-shaped part and forward. A cleaning brush is fixed to the horizontal section of the connecting rod. The arc-shaped part has a uniform radius structure, and the central axis of the connecting shaft is collinear with the arc center axis of the arc surface.

[0008] Furthermore, the cleaning brush includes a tubular mounting sleeve that is fitted and fixed to the horizontal section of the connecting rod, and the upper surface of the mounting sleeve is set as a semi-circular arc surface structure. Several bristles are uniformly fixed on the upper surface of the mounting sleeve, and the length of the bristles is greater than the maximum radial dimension of the cam.

[0009] Furthermore, a U-shaped connecting frame is fixed to the outer side of the rear side wall of the housing. The rear ends of the rotating shaft and the connecting shaft both extend through the rear side wall of the housing and are connected to the middle section of the connecting frame. A first rotating wheel and a second rotating wheel located on the outer side of the housing are fixed to the connecting shaft. A third rotating wheel aligned with the first rotating wheel is fixed to one of the rotating shafts, and a fourth rotating wheel aligned with the second rotating wheel is fixed to the other rotating shaft. A first belt connects the first rotating wheel and the third rotating wheel, and a second belt connects the second rotating wheel and the fourth rotating wheel. The first rotating wheel, the second rotating wheel, the third rotating wheel, the fourth rotating wheel, the first belt, and the second belt are all located inside the connecting frame. A motor is fixed to the outer side of the connecting frame at the corresponding location of the connecting shaft, and the output shaft of the motor is fixed to the connecting shaft.

[0010] Furthermore, an arc-shaped through groove is provided on the side wall of the air outlet, and a filter screen is inserted into the through groove, with the inner end of the filter screen abutting against the inner wall of the air outlet on the side away from the through groove.

[0011] Furthermore, the filter screen is fixed with an insertion edge that matches the through groove at the corresponding through groove, and a push-pull block is fixed to the outside of the insertion edge.

[0012] Furthermore, a through groove is provided at the bottom front side of the box, and a collection box is horizontally inserted into the through groove, with the inner end of the collection box abutting against the inner wall of the rear side of the box.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] In use, the boiler fly ash collection device of this utility model has its air inlet connected to the boiler exhaust port. Smoke enters the box through the air inlet and flows towards the exhaust port. During this process, fly ash in the smoke is filtered out by a filter screen, leaving it inside the box. The filter screen is designed with a longitudinally reciprocating moving connection structure, intermittently vibrating the fly ash adhering to the filter screen, causing it to fall to the bottom of the box. Simultaneously, a cleaning brush rotates along the bottom of the arc-shaped part of the filter screen, further cleaning the arc-shaped part to prevent fly ash from clogging the filter holes. This device effectively separates fly ash from the smoke, thereby effectively reducing fly ash emissions into the external environment. The reciprocating moving filter screen and cleaning brush effectively prevent fly ash from clogging the filter screen. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0016] Figure 1This is a schematic diagram of the boiler fly ash collection device according to an embodiment of the present invention;

[0017] Figure 2 This is a left view of the boiler fly ash collection device described in an embodiment of the present invention;

[0018] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0019] Figure 4 This is a front view of the boiler fly ash collection device according to an embodiment of the present utility model;

[0020] Figure 5 for Figure 4 Cross-sectional view along the BB direction;

[0021] Figure 6 This is an exploded view of the connection structure between the filter screen and the air outlet as described in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Housing; 101. Air inlet; 102. Movable slot; 2. End cover; 201. Air outlet; 202. Through slot; 3. Filter screen; 301. Arc-shaped part; 302. Connecting part; 4. Rotating shaft; 5. Cam; 6. Connecting shaft; 7. Connecting rod; 701. Connecting ring; 8. Cleaning brush; 801. Mounting sleeve; 802. Brush bristles; 9. Dust filter screen; 901. Insertion edge; 902. Push-pull block; 10. Connecting frame; 11. Motor; 12. Collection box. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] As shown in the figure, a boiler fly ash collection device includes a box body 1 and an end cap 2 fixed to the top opening of the box body 1. An air inlet 101 is provided on the lower part of the side wall of the box body 1, and an air outlet 201 is provided on the end cap 2. A filter screen 3 that can move longitudinally back and forth is horizontally inserted inside the box body 1. The middle of the filter screen 3 is provided with a downwardly recessed arc-shaped part 301. Multiple filter holes are evenly opened on the arc-shaped part 301. The filter screen 3 is positioned higher than the air inlet 101. Inside the box body 1, at the bottom of the arc-shaped part 301 of the filter screen 3, a cleaning brush 8 that can rotate along the lower surface of the arc-shaped part 301 is also provided. In this embodiment, the air inlet 101 of the housing 1 is connected to the boiler exhaust port. Smoke enters the housing 1 through the air inlet 101 and flows toward the exhaust port 201. During this process, fly ash in the smoke is filtered out by the filter screen 3, so that the fly ash remains in the housing 1. The filter screen 3 is set as a longitudinally reciprocating connecting structure, which intermittently vibrates the fly ash attached to the filter screen 3, so that the fly ash attached to the filter screen 3 falls to the bottom of the housing 1. At the same time, the cleaning brush 8 is controlled to rotate along the bottom of the arc-shaped part 301 of the filter screen 3, and the arc-shaped part 301 is further cleaned by the cleaning brush 8 to prevent fly ash from clogging the filter holes.

[0029] The filter screen 3 also includes connecting portions 302 horizontally arranged on both sides of the arc-shaped portion 301. A strip-shaped movable groove 102 is provided on the inner wall of the housing 1 corresponding to each connecting portion 302. The connecting portion 302 is inserted into the corresponding movable groove 102, and the width of the movable groove 102 is greater than the thickness of the connecting portion 302. Inside the housing 1, a rotatable shaft 4 is horizontally arranged below each connecting portion 302. Multiple cams 5 are fixedly connected to each shaft 4, and the cams 5 contact the bottom of the corresponding connecting portion 302. In this embodiment, rotating the shaft 4 drives the cams 5 to rotate, thereby realizing the longitudinal reciprocating movement of the connecting portion 302 within the movable groove 102, ultimately achieving the longitudinal reciprocating movement of the filter screen 3. In this embodiment, the cams 5 and the shaft 4 are interference-fitted together.

[0030] A connecting shaft 6, rotatable along the central axis, is connected to the rear wall of the housing 1. The front end of the connecting shaft 6 extends into the housing 1. A connecting ring 701, located inside the housing 1, is fixed to the connecting shaft 6. An L-shaped connecting rod 7 is fixed to the lower side of the connecting ring 701. A gap is provided between the filter screen 3 and the rear wall of the housing 1. The vertical section of the connecting rod 7 passes through the gap, and the horizontal section of the connecting rod 7 is located below the arc-shaped part 301 and forward-facing. A cleaning brush 8 is fixed to the horizontal section of the connecting rod 7. The arc-shaped part 301 has a uniform radius structure. The central axis of the connecting shaft 6 is collinear with the arc center axis of the arc surface, ensuring that the connecting shaft 6 rotates, driving the cleaning brush 8 to rotate, and that the cleaning brush 8 can clean the arc-shaped part 301 during rotation. In this embodiment, the rear end of the movable groove 102 corresponds to the rear end of the filter screen 3, minimizing or avoiding the possibility of the filter screen 3 shifting back and forth. In this embodiment, the connecting ring 701 and the connecting shaft 6 are interference-fitted together.

[0031] The cleaning brush 8 includes a tubular mounting sleeve 801 that is sleeved and fixed to the horizontal section of the connecting rod 7. The upper surface of the mounting sleeve 801 is set as a semi-circular arc surface structure. A number of flexible bristles 802 are uniformly fixed on the upper surface of the mounting sleeve 801. The length of the bristles 802 is greater than the maximum radial dimension of the cam 5 (i.e., the distance from the far end of the cam 5 profile to the rotation axis of the cam 5). This ensures that when the filter screen 3 moves longitudinally back and forth under the action of the cam 5, the bristles 802 can touch the arc-shaped part 301 in a deformed state, thereby effectively cleaning the arc-shaped part 301.

[0032] A U-shaped connecting frame 10 is fixed to the outer side of the rear side wall of the housing 1. The rear ends of the rotating shaft 4 and the connecting shaft 6 both extend out of the rear side wall of the housing 1 and are connected to the middle section of the connecting frame 10. A first rotating wheel and a second rotating wheel located on the outer side of the housing 1 are fixed to the connecting shaft 6. A third rotating wheel aligned with the first rotating wheel is fixed to one of the rotating shafts 4, and a fourth rotating wheel aligned with the second rotating wheel is fixed to the other rotating shaft 4. A first belt connects the first rotating wheel and the third rotating wheel, and a second belt connects the second rotating wheel and the fourth rotating wheel. The first rotating wheel, the second rotating wheel, the third rotating wheel, the fourth rotating wheel, the first belt, and the second belt are all located inside the connecting frame 10. A motor 11 is fixed to the outer side of the connecting frame 10 corresponding to the connecting shaft 6. The output shaft of the motor 11 is fixed to the connecting shaft 6. The motor 11 drives the connecting shaft 6 to rotate, which in turn drives the two rotating shafts 4 to rotate through the transmission action of the rotating wheels and belts. Finally, the cleaning brush 8 rotates along the connecting shaft 6, and the cam 5 rotates along the rotating shaft 4. In this embodiment, the first rotating wheel is located in front of the second rotating wheel, and the outer diameters of the first rotating wheel, the second rotating wheel, the third rotating wheel, and the fourth rotating wheel are the same.

[0033] An arc-shaped through groove 202 is provided on the side wall of the air outlet 201. A dust filter 9 is inserted into the through groove 202, and the inner end of the dust filter 9 abuts against the inner wall of the air outlet 201 on the side away from the through groove 202.

[0034] A connecting edge 901, matching the through groove 202, is fixedly connected to the filter screen 9 at the corresponding location. A push-pull block 902 is fixedly connected to the outer side of the connecting edge 901 for pulling or pushing the filter screen 9 from the through groove 202. In this embodiment, the filter screen 9 has a circular structure that matches the inner diameter of the air outlet 201, and the connecting edge 901 and the filter screen 9 are welded together. In this embodiment, an anti-slip layer is provided on the inner wall of the through groove 202 to prevent the connecting edge 901 from easily detaching from the through groove 202 when inserted.

[0035] A through groove is provided at the bottom front side of the box 1, and a collection box 12 is horizontally inserted into the through groove. The inner end of the collection box 12 abuts against the inner wall of the rear side of the box 1. The collection box 12 is set to collect the falling coal ash.

[0036] The working process of this embodiment is as follows:

[0037] In use, the air inlet 101 of the housing 1 is connected to the boiler exhaust port, and the air outlet 201 of the housing 1 is connected to the negative pressure fan through a pipe, so that the smoke can flow from the air inlet 101 to the air outlet 201. Smoke enters the housing 1 through the air inlet 101 and flows towards the air outlet 201. During this process, fly ash in the smoke is filtered out by the filter screen 3, leaving the fly ash inside the housing 1. In addition, when the smoke filtered by the filter screen 3 passes through the air outlet 201, it will be filtered again by the ash filter screen 9. The motor 11 is started to control the cleaning brush 8 to rotate along the connecting shaft 6 at a certain angle, and drive the cam 5 to rotate along the rotating shaft 4 at a certain angle, so that the cam 5 and the cleaning brush 8 swing back and forth. The cam 5 realizes the longitudinal reciprocating movement of the filter screen 3, intermittently vibrating the fly ash attached to the filter screen 3, so that the fly ash attached to the filter screen 3 falls to the bottom of the housing 1. At the same time, the cleaning brush 8 rotates along the bottom of the arc-shaped part 301 of the filter screen 3, and the cleaning brush 8 further cleans the arc-shaped part 301 to prevent fly ash from clogging the filter holes.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A boiler fly ash collection device, characterized in that: The device includes a housing and an end cap fixed to the opening at the top of the housing. An air inlet is provided on the lower part of the side wall of the housing, and an air outlet is provided on the end cap. A filter screen that can move longitudinally back and forth is horizontally inserted inside the housing. The filter screen has a downwardly concave arc-shaped part in the middle, and multiple filter holes are evenly opened on the arc-shaped part. The filter screen is positioned higher than the air inlet. Inside the housing, at the bottom of the arc-shaped part of the filter screen, there is also a cleaning brush that can rotate along the lower surface of the arc-shaped part.

2. The boiler fly ash collection device according to claim 1, characterized in that: The filter screen also includes connecting parts horizontally arranged on both sides of the arc-shaped part. On the inner wall of the box, there are strip-shaped movable grooves at the corresponding two connecting parts. The connecting parts are inserted into the corresponding movable grooves, and the width of the movable grooves is greater than the thickness of the connecting parts. Inside the box, there are horizontally rotatable shafts located below the two connecting parts. Each shaft is fixed with multiple cams, and the cams are in contact with the bottom of the corresponding connecting parts.

3. The boiler fly ash collection device according to claim 2, characterized in that: A connecting shaft that can rotate along the central axis is connected to the rear side wall of the housing, and the front end of the connecting shaft extends into the housing. A connecting ring located inside the housing is fixed to the connecting shaft. An L-shaped connecting rod is fixed to the lower side of the connecting ring. A gap is provided between the filter screen and the rear side wall of the housing. The vertical section of the connecting rod passes through the gap, and the horizontal section of the connecting rod is located below the arc-shaped part and forward. A cleaning brush is fixed to the horizontal section of the connecting rod. The arc-shaped part has a uniform radius structure, and the central axis of the connecting shaft is collinear with the arc center axis of the arc surface.

4. A boiler fly ash collection device according to claim 3, characterized in that: The cleaning brush includes a tubular mounting sleeve that is fitted and fixed to the horizontal section of the connecting rod. The upper surface of the mounting sleeve is set as a semi-circular arc structure. Several bristles are uniformly fixed on the upper surface of the mounting sleeve, and the length of the bristles is greater than the maximum radial dimension of the cam.

5. A boiler fly ash collection device according to claim 3, characterized in that: A U-shaped connecting frame is fixed to the outer side of the rear side wall of the housing. The rear ends of the rotating shaft and the connecting shaft both extend out of the rear side wall of the housing and are connected to the middle section of the connecting frame. A first rotating wheel and a second rotating wheel located on the outer side of the housing are fixed to the connecting shaft. A third rotating wheel aligned with the first rotating wheel is fixed to one of the rotating shafts, and a fourth rotating wheel aligned with the second rotating wheel is fixed to the other rotating shaft. A first belt connects the first rotating wheel and the third rotating wheel, and a second belt connects the second rotating wheel and the fourth rotating wheel. The first rotating wheel, the second rotating wheel, the third rotating wheel, the fourth rotating wheel, the first belt, and the second belt are all located inside the connecting frame. A motor is fixed to the outer side of the connecting frame at the corresponding position of the connecting shaft, and the output shaft of the motor is fixed to the connecting shaft.

6. A boiler fly ash collection device according to claim 1, characterized in that: An arc-shaped through groove is provided on the side wall of the air outlet, and a filter screen is inserted into the through groove, with the inner end of the filter screen abutting against the inner wall of the air outlet on the side away from the through groove.

7. A boiler fly ash collection device according to claim 6, characterized in that: The filter screen has an insertion edge that matches the through groove, and a push-pull block is fixed to the outside of the insertion edge.

8. A boiler fly ash collection device according to claim 1, characterized in that: A through groove is provided at the bottom front side of the box, and a collection box is horizontally inserted into the through groove, with the inner end of the collection box abutting against the inner wall of the rear side of the box.

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