Ash removal device for air preheater

Abstract

The utility model discloses a deashing device for an air preheater, which belongs to the technical field of air preheaters and comprises a bottom plate, the air preheater is fixedly mounted at the upper end of the bottom plate, and a rotary deashing mechanism is mounted on the air preheater. The rotary ash removal mechanism comprises a transverse moving assembly and an autorotation ash removal assembly; a plurality of brushes are mounted on the self-rotating ash removal assembly; a reciprocating ash scraping mechanism is mounted at the upper end of the bottom plate; and the scraping plate is mounted on the reciprocating ash scraping mechanism. Through the mode, dust is prevented from being accumulated between the upper heat conduction pipe and the lower heat conduction pipe, the heat exchange efficiency of the heat conduction pipes and air is improved, an additional driving assembly is not needed, and the manufacturing cost is reduced; and dust cleaning is carried out on positions which are difficult to treat, so that the extra workload of workers is reduced, and the practicability of the device is further improved.

Description

Technical Field

[0001] This utility model relates to the field of air preheater technology, and specifically to a dust removal device for air preheaters. Background Technology

[0002] Air preheaters are often installed at the tail end of boilers. These preheaters tend to accumulate ash during operation; this ash, mainly composed of a viscous mixture, can obstruct flue gas flow.

[0003] Chinese patent CN218672257U discloses a dust removal comb for an air preheater and its dust removal device, including a connecting block, a first comb strip, and a second comb strip. The two ends of the first and second comb strips are connected by connecting pieces, which are V-shaped. The connecting block is fixedly connected to the connecting piece located at the upper end. However, this device still has the following problems in use:

[0004] The arc-shaped areas at the top and bottom of the heat pipes are cleaning blind spots. During use, the comb can only clean the dust between adjacent heat pipes. Over time, dust will accumulate between the arc-shaped surfaces of the heat pipes, affecting the use of the air preheater.

[0005] Based on this, the present invention designs a dust removal device for an air preheater to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a dust removal device for an air preheater.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A dust removal device for an air preheater includes a base plate, an air preheater, a rotary dust removal mechanism, a brush, a reciprocating dust scraping mechanism, and a scraper. The air preheater is fixedly installed on the upper end of the base plate, and a rotary dust removal mechanism for cleaning the dust on the heat conduction pipes of the air preheater is installed on the air preheater.

[0009] The rotary cleaning mechanism includes a lateral moving component for controlling the left and right movement of the self-rotating cleaning component and a self-rotating cleaning component for controlling the brush to clean the heat-conducting pipe; the lateral moving component is installed at the top of the air preheater, the self-rotating cleaning component is installed on the air preheater and is connected to the lateral moving component.

[0010] The self-rotating dust removal assembly is equipped with multiple brushes; the upper end of the base plate is equipped with a reciprocating dust scraping mechanism that controls the movement of the scraper to clean the dust on the base plate; the scraper is mounted on the reciprocating dust scraping mechanism.

[0011] Furthermore, the lateral movement assembly includes a support crossbar, a drive assembly, a drive gear, a connecting plate, and a rack. The support crossbar is symmetrically fixedly installed on the front and rear sides of the upper end of the air preheater; the drive assembly is installed on the rear support crossbar and is connected to the drive gear; the lower end of the connecting plate is connected to the self-rotating dust removal assembly; the rack is fixedly installed on the upper end of the connecting plate; and the drive gear meshes with the rack.

[0012] Furthermore, the drive assembly includes a motor and a rotating shaft. The motor is fixedly mounted on the rear end of the rear support crossbar, and the output end of the motor is fixedly connected to the rotating shaft. The two ends of the rotating shaft are rotatably connected to the ends of the two support crossbars that are close to each other. The drive gear is fixedly mounted in the middle of the rotating shaft.

[0013] Furthermore, the self-rotating ash-cleaning assembly includes bait plates, a lead screw, a sliding plate, a rotating gear, and a driven gear ring. The bait plates are symmetrically fixedly installed on the left and right sides of the front end of the air preheater; the left and right ends of the lead screw are fixedly connected to the bait plates on the left and right sides; the upper and lower ends of the front side of the sliding plate are symmetrically provided with circular sliding grooves that cooperate with the lead screw; the two sliding plates are slidably connected to the heat-conducting pipes on the air preheater; and the lead screw passes through the circular sliding grooves provided on the front side of the sliding plate; the two sliding plates are fixedly connected by a connecting plate; the upper and lower ends of the right front side of the sliding plate are symmetrically rotatably installed with rotating gears, and the middle part of the rotating gears is threadedly connected to the lead screw; multiple driven gear rings are rotatably installed on the right end of the sliding plate, and the inner diameter of the driven gear rings is larger than the outer diameter of the heat-conducting pipes on the air preheater; one rotating gear simultaneously meshes with the foremost driven gear ring in the two rows; and adjacent driven gear rings mesh with each other; the interior of the driven gear ring is fixedly connected to a brush; each heat-conducting pipe on the air preheater has a driven gear ring on its outer wall.

[0014] Furthermore, the inner diameter of the circular sliding groove is larger than the outer diameter of the lead screw;

[0015] Furthermore, the reciprocating scraping mechanism includes a guide rod, a servo motor, a second lead screw, and a fixing plate; fixing plates are symmetrically installed on the front and rear ends and left and right sides of the base plate; the front and rear ends of the guide rod are fixedly connected to the two fixing plates on the right side of the base plate; the front and rear ends of the second lead screw are rotatably connected to the two fixing plates on the left side of the base plate; the servo motor is fixedly installed on the fixing plate on the left side of the rear end of the base plate; and the output end of the servo motor is fixedly connected to the second lead screw; the scraper is threadedly connected to the second lead screw and the scraper is slidably connected to the guide rod.

[0016] Furthermore, the brush is spiral-shaped, with the bristles facing the heat pipe of the air preheater;

[0017] Furthermore, the surface of the scraper that contacts the base plate is made of rubber.

[0018] Compared with the prior art, the advantages of this utility model are as follows: After the air preheater has been working for a period of time, the horizontal moving component drives the self-rotating dust removal component to move left and right. During the movement, the self-rotating dust removal component drives multiple brushes to rotate together, thereby cleaning the dust on the heat dissipation pipes of the air preheater in all directions. This prevents dust from accumulating between the upper and lower heat conduction pipes, ensuring the working environment of the heat conduction pipes on the air preheater, improving the heat exchange efficiency between the heat conduction pipes and the air. Furthermore, the self-rotating dust removal component eliminates the need for additional drive components, reducing manufacturing costs and improving the practicality of the device. After the horizontal moving component and the self-rotating dust removal component have been working for a period of time, the dust will dissipate downwards under its own gravity and eventually fall to the upper end of the bottom plate. The reciprocating dust scraping mechanism then drives the scraper to clean the dust in areas on the upper part of the bottom plate that are difficult for operators to reach, reducing the extra workload of the staff and further improving the practicality of the device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This utility model relates to a three-dimensional dust removal device for an air preheater. Figure 1 ;

[0021] Figure 2 This is a front view of a dust removal device for an air preheater according to the present invention;

[0022] Figure 3 This utility model relates to a three-dimensional dust removal device for an air preheater. Figure 2 ;

[0023] Figure 4 This utility model relates to a three-dimensional dust removal device for an air preheater. Figure 3 ;

[0024] Figure 5 This is a schematic diagram of the driven gear ring and brush structure.

[0025] The labels in the diagram represent:

[0026] 1. Base plate; 2. Air preheater; 3. Rotary dust removal mechanism; 31. Lateral movement assembly; 311. Support crossbar; 312. Rotating shaft; 313. Drive gear; 314. Connecting plate; 315. Rack; 316. Motor; 32. Self-rotating dust removal assembly; 321. Bait plate; 322. Lead screw; 323. Sliding plate; 324. Self-rotating gear; 325. Driven gear ring; 326. Circular sliding groove; 4. Brush; 5. Reciprocating dust scraping mechanism; 51. Guide rod; 52. Servo motor; 53. Second lead screw; 54. Fixing plate; 6. Scraper. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0029] In some embodiments, please refer to the accompanying drawings. Figures 1-5 A dust removal device for an air preheater includes a base plate 1, an air preheater 2, a rotary dust removal mechanism 3, a brush 4, a reciprocating dust scraping mechanism 5, and a scraper 6. The air preheater 2 is fixedly installed on the upper end of the base plate 1. The rotary dust removal mechanism 3 is installed on the air preheater 2 for cleaning the dust on the heat conduction pipes of the air preheater 2 from all directions. The rotary dust removal mechanism 3 includes a lateral movement component 31 for controlling the left and right movement of the self-rotating dust removal component 32 and a self-rotating dust removal component 32 for controlling the brush 4 to clean the heat conduction pipes. The lateral moving component 31 is installed at the top of the air preheater 2, and the self-rotating dust removal component 32 is installed on the air preheater 2 and connected to the lateral moving component 31. The self-rotating dust removal component 32 is equipped with multiple brushes 4, and the brushes 4 are spiral-shaped with the bristles facing the heat conduction pipe of the air preheater 2. The upper end of the base plate 1 is equipped with a reciprocating dust removal mechanism 5 that controls the movement of the scraper 6 to clean the dust on the base plate 1. The scraper 6 is installed on the reciprocating dust removal mechanism 5. The contact surface between the scraper 6 and the base plate 1 is made of rubber.

[0030] In this invention, after the air preheater 2 has been working for a period of time, the lateral moving component 31 drives the self-rotating dust removal component 32 to move left and right. During the movement, the self-rotating dust removal component 32 drives multiple brushes 4 to rotate together, thereby cleaning the dust on the heat dissipation pipes of the air preheater 2 from all directions. This prevents dust from accumulating between the upper and lower heat conduction pipes, ensuring the working environment of the heat conduction pipes on the air preheater 2, improving the heat exchange efficiency between the heat conduction pipes and the air. Furthermore, the self-rotating dust removal component 32 eliminates the need for additional drive components in the dust removal device, reducing manufacturing costs and improving the practicality of the device. After the lateral moving component 31 and the self-rotating dust removal component 32 have been working for a period of time, the dust will dissipate downwards under its own gravity and eventually fall to the upper end of the bottom plate 1. The reciprocating dust scraping mechanism 5 then works, driving the scraper 6 to clean the dust in areas on the upper end of the bottom plate 1 that are difficult for operators to reach, reducing the extra workload for the staff and further improving the practicality of the device.

[0031] The lateral movement assembly 31 includes a support crossbar 311, a rotating shaft 312, a drive gear 313, a connecting plate 314, a rack 315, and a motor 316. The support crossbar 311 is symmetrically fixedly installed on the front and rear sides of the upper end of the air preheater 2. The motor 316 is fixedly installed at the rear end of the rear support crossbar 311, and the output end of the motor 316 is fixedly connected to the rotating shaft 312. The two ends of the rotating shaft 312 are rotatably connected to the ends of the two support crossbars 311 that are close to each other. The drive gear 313 is fixedly installed in the middle of the rotating shaft 312. The lower end of the connecting plate 314 is connected to the self-rotating dust removal assembly 32. The rack 315 is fixedly installed at the upper end of the connecting plate 314. The drive gear 313 and the rack 315 are meshed together.

[0032] The self-rotating ash-removing assembly 32 includes a bait plate 321, a lead screw 322, a sliding plate 323, a self-rotating gear 324, and a driven gear ring 325. The bait plates 321 are symmetrically fixedly installed on the left and right sides of the front end of the air preheater 2. The left and right ends of the lead screw 322 are fixedly connected to the bait plates 321 on the left and right sides. The upper and lower ends of the front side of the sliding plate 323 are symmetrically provided with circular sliding grooves 326 that cooperate with the lead screw 322. The inner diameter of the circular sliding grooves 326 is larger than the outer diameter of the lead screw 322. The two sliding plates 323 are slidably connected to the heat conduction pipes on the air preheater 2. The lead screw 322 passes through the circular sliding grooves 326 provided on the front side of the sliding plate 323. The moving plate 323 is fixedly connected by the connecting plate 314; a rotating gear 324 is symmetrically mounted on the upper and lower sides of the right front end of the sliding plate 323, and the middle part of the rotating gear 324 is threadedly connected to the lead screw 322; multiple driven gear rings 325 are rotatably mounted on the right end of the sliding plate 323, and the inner diameter of the driven gear ring 325 is larger than the outer diameter of the heat conduction pipe on the air preheater 2; one rotating gear 324 simultaneously meshes with the foremost driven gear ring 325 in the two rows; and adjacent driven gear rings 325 mesh with each other; the inside of the driven gear ring 325 is fixedly connected to the brush 4; each heat conduction pipe on the air preheater 2 is provided with a driven gear ring 325 on its outer wall;

[0033] In this invention, the motor 316 drives the rotating shaft 312 to rotate, and the drive gear 313 rotates together with the rotating shaft 312. The rotation of the drive gear 313 drives the rack 315 to move, so that the connecting plate 314 drives the two sliding plates 323 to slide together along the heat conduction pipe on the air preheater 2. During the movement of the sliding plates 323, the lead screw 322 causes the two rotating gears 324 to rotate simultaneously. The rotation of the rotating gears 324 drives the driven gear ring 32 meshing with the rotating gear 324. 5. Rotate, and then the front driven gear ring 325 drives the rear driven gear ring 325 to rotate, so that all the driven gear rings 325 installed on the sliding plate 323 drive the brush 4 to rotate and clean the surface of the heat pipe; when the brush 4 on the right sliding plate 323 touches the right end of the air preheater 2, the motor 316 reverses, so that the drive gear 313 drives the two sliding plates 323 to return to their original position following the rack 315. Repeat the above operation to perform a comprehensive cleaning operation on the heat pipe of the air preheater 2.

[0034] The reciprocating scraping mechanism 5 includes a guide rod 51, a servo motor 52, a second lead screw 53, and a fixing plate 54. Fixing plates 54 are symmetrically installed on the front and rear ends and left and right sides of the base plate 1. The front and rear ends of the guide rod 51 are fixedly connected to the two fixing plates 54 on the right side of the base plate 1. The front and rear ends of the second lead screw 53 are rotatably connected to the two fixing plates 54 on the left side of the base plate 1. The servo motor 52 is fixedly installed on the fixing plate 54 on the left side of the rear end of the base plate 1. The output end of the servo motor 52 is fixedly connected to the second lead screw 53. The scraper 6 is threadedly connected to the second lead screw 53 and the scraper 6 is limited and slidably connected to the guide rod 51.

[0035] In this invention, the servo motor 52 drives the second lead screw 53 to rotate, causing the scraper 6 to move back and forth along the guide rod 51 to clean the dust on the upper surface of the base plate 1 and prevent dust accumulation.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dust removal device for an air preheater, comprising a base plate (1), characterized in that: It also includes an air preheater (2), a rotary dust removal mechanism (3), a brush (4), a reciprocating dust scraping mechanism (5) and a scraper (6). An air preheater (2) is fixedly installed on the upper end of the base plate (1). A rotary dust removal mechanism (3) for cleaning the dust on the heat pipe of the air preheater (2) is installed on the air preheater (2). The rotary cleaning mechanism (3) includes a lateral moving component (31) for controlling the left and right movement of the self-rotating cleaning component (32) and a self-rotating cleaning component (32) for controlling the brush (4) to clean the heat-conducting pipe; the lateral moving component (31) is installed at the top of the air preheater (2), the self-rotating cleaning component (32) is installed on the air preheater (2) and the self-rotating cleaning component (32) is connected to the lateral moving component (31); Multiple brushes (4) are installed on the self-rotating dust removal assembly (32); a reciprocating dust removal mechanism (5) is installed on the upper end of the base plate (1) to control the movement of the scraper (6) to clean the dust on the base plate (1); the scraper (6) is installed on the reciprocating dust removal mechanism (5).

2. The ash removal device for an air preheater according to claim 1, characterized in that, The lateral movement assembly (31) includes a support crossbar (311), a drive assembly, a drive gear (313), a connecting plate (314), and a rack (315). The support crossbar (311) is symmetrically fixedly installed on the front and rear sides of the upper end of the air preheater (2). The drive assembly is installed on the rear support crossbar (311) and is connected to the drive gear (313). The lower end of the connecting plate (314) is connected to the self-rotating dust removal assembly (32). The rack (315) is fixedly installed on the upper end of the connecting plate (314). The drive gear (313) is meshed with the rack (315).

3. The air preheater cleaning device according to claim 2, characterized in that, The drive assembly includes a motor (316) and a rotating shaft (312). The motor (316) is fixedly installed at the rear end of the rear support crossbar (311), and the output end of the motor (316) is fixedly connected to the rotating shaft (312). The two ends of the rotating shaft (312) are rotatably connected to the ends of the two support crossbars (311) that are close to each other. The drive gear (313) is fixedly installed in the middle of the rotating shaft (312).

4. The air preheater cleaning device according to claim 3, characterized in that, The self-rotating ash removal assembly (32) includes a bait plate (321), a lead screw (322), a sliding plate (323), a self-rotating gear (324), and a driven gear ring (325). The bait plates (321) are symmetrically fixedly installed on the left and right sides of the front end of the air preheater (2). The left and right ends of the lead screw (322) are fixedly connected to the bait plates (321) on the left and right sides. The upper and lower ends of the front side of the sliding plate (323) are symmetrically provided with circular sliding grooves (326) that cooperate with the lead screw (322). The two sliding plates (323) are slidably connected to the heat conduction pipes on the air preheater (2). The lead screw (322) passes through the front side of the sliding plate (323). A circular sliding groove (326) is provided; two sliding plates (323) are fixedly connected by a connecting plate (314); a self-rotating gear (324) is symmetrically installed on the upper and lower sides of the right front side of the sliding plate (323), and the middle part of the self-rotating gear (324) is threadedly connected to the lead screw (322); multiple driven gear rings (325) are rotatably installed on the right end of the sliding plate (323), and the inner diameter of the driven gear ring (325) is larger than the outer diameter of the heat conduction pipe on the air preheater (2); one self-rotating gear (324) simultaneously meshes with the foremost driven gear ring (325) in the two rows; and adjacent driven gear rings (325) mesh with each other; The driven gear ring (325) is fixedly connected to the brush (4) inside; each heat pipe on the air preheater (2) is provided with a driven gear ring (325) on its outer wall.

5. The air preheater cleaning device according to claim 4, characterized in that, The inner diameter of the circular sliding groove (326) is larger than the outer diameter of the lead screw (322).

6. The ash removal device for an air preheater according to claim 1, characterized in that, The reciprocating scraping mechanism (5) includes a guide rod (51), a servo motor (52), a second lead screw (53), and a fixing plate (54); the fixing plates (54) are symmetrically installed on the front and rear ends and left and right sides of the base plate (1); the front and rear ends of the guide rod (51) are fixedly connected to the two fixing plates (54) on the right side of the base plate (1); the front and rear ends of the second lead screw (53) are rotatably connected to the two fixing plates (54) on the left side of the base plate (1); the servo motor (52) is fixedly installed on the fixing plate (54) on the left side of the rear end of the base plate (1); and the output end of the servo motor (52) is fixedly connected to the second lead screw (53); the scraper (6) is threadedly connected to the second lead screw (53) and the scraper (6) is limited and slidably connected to the guide rod (51).

7. The air preheater cleaning device according to claim 1, characterized in that, The brush (4) is spiral-shaped with the bristles facing the heat pipe of the air preheater (2).

8. The ash removal device for an air preheater according to claim 1, characterized in that, The contact surface between the scraper (6) and the base plate (1) is made of rubber.

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