Self-cleaning air preheater

Abstract

The utility model belongs to the technical field of air pre-heaters, in particular to a self-cleaning air pre-heater, which comprises an air pre-heater and a cleaning device, the inner surface of the air pre-heater is communicated with a plurality of guide pipes, the two sides of the air pre-heater are fixedly connected with air circulation parts, and the upper end and the lower end of the air pre-heater are fixedly connected with smoke circulation parts; a cleaning device is arranged on the surface of the air pre-heater and comprises two containing plates, the side walls of the two containing plates are fixedly connected with the two sides of the air pre-heater correspondingly, threaded rods are rotationally connected to the inner surfaces of the containing plates, and a sealing device is arranged at the bottom end of the air pre-heater and comprises two containing blocks. The upper surfaces of the two placing blocks are fixedly connected with the bottom end of the air pre-heater, the inner walls of the two placing blocks are slidably connected with a sealing plate, and the sealing plate is located at the bottom end of the air pre-heater; by arranging the whole device, the air pre-heater can be cleaned, the situation that smoke residues are attached to the air pre-heater and the guide pipe is reduced, and therefore the influence on the heat exchange efficiency is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air preheater technical field, concretely is self -cleaning air preheater. BACKGROUND

[0002] The working principle of the air preheater is based on the heat conduction principle, and the system temperature is improved by controlling the transmission and storage of heat. When the heat exchange element of the air preheater passes through the flue gas side, part of the heat carried by the flue gas is transferred to the heat exchange element; and when the heat exchange element passes through the air side, the heat is transferred to the air.

[0003] For the above and the prior art related, the inventor believes that the following defects often exist: in the boiler operation, in order to increase the efficiency, the air preheater is installed on the flue gas exhaust equipment, because most of the air preheaters lack self-cleaning mechanism, the duct in the air preheater is contaminated with a large amount of smoke debris in a long time, which is easy to affect the heat efficiency; therefore, the self-cleaning air preheater is proposed for the above problems. CONTENT OF THE UTILITY MODEL

[0004] In order to make up for the deficiencies of the prior art, at least one technical problem proposed in the background art is solved.

[0005] The utility model solves the technical scheme that the utility model discloses a self -cleaning air preheater, including air preheater and cleaning device, the inner surface of air preheater is connected with a plurality of pipes, both sides of air preheater are fixedly connected with air flow department, and the upper and lower ends of air preheater are fixedly connected with flue gas flow department;The surface of air preheater is equipped with cleaning device, the side wall of two placing plates is fixedly connected with air preheater on both sides respectively, the inner surface of placing plate is rotatably connected with screw rod, the surface of two screw rods is threadedly connected with scraper, and the inner surface of air preheater is slidably connected with the surface of scraper, the position of the surface of scraper close to pipe is equipped with scraper hole, and the inner wall of scraper hole is slidably connected with the surface of pipe, and the scraper moves on the surface of pipe through the scraper hole, and the pipe can be cleaned by setting placing plate, screw rod, scraper and scraper hole.

[0006] Preferably, the side wall of the placing plate is fixedly connected with a fixing belt, and the inner surface of the fixing belt is fixedly connected with a motor. The motor is located on the side wall of the placing plate. The fixing belt is fixed on the surface of the motor and the side wall of the placing plate. The motor is fixed by the fixing belt.

[0007] Preferably, the output end of the motor is fixedly connected with a turntable, and the surface of the turntable and the screw rod is engaged with a belt. The turntable drives the belt to move, and the belt drives the screw rod to rotate. The screw rod is driven to rotate by the motor, the turntable and the belt.

[0008] Preferably, the surface of the placement plate is provided with a movable hole near the position of the threaded rod, the movable hole inner wall of the placement plate is rotationally connected with the surface of the threaded rod, when the threaded rod rotates, the threaded rod rotates in the movable hole inner wall of the placement plate, and the movable hole is provided to facilitate the rotation of the threaded rod.

[0009] Preferably, the surface of the air preheater is provided with a placement groove, the placement groove inner wall of the air preheater is slidingly connected with the surface of the scraper, when the scraper moves, the scraper slides in the placement groove inner wall of the air preheater, and the placement groove is provided to facilitate the movement of the scraper.

[0010] Preferably, the bottom end of the air preheater is provided with a sealing device, the sealing device comprises two placement blocks, the upper surfaces of the two placement blocks are fixedly connected with the bottom end of the air preheater, sealing plates are slidingly connected with the inner walls of the two placement blocks, and the sealing plates are located at the bottom end of the air preheater.

[0011] Preferably, the bottom end of the air preheater is fixedly connected with a support strip, and the support strip is inserted into the inner wall of the sealing plate.

[0012] Preferably, the bottom end of the sealing plate is fixedly connected with a push strip, a plurality of springs are fixedly connected between the inner surface of the sealing plate and the side wall of the placement block, and after cleaning, the spring of the push strip is released and rebounds.

[0013] The utility model discloses the beneficial effect lies in:

[0014] 1. When the air preheater needs to be cleaned, the motor in the fixed belt is started, the motor output end drives the rotating disc to rotate, the rotating disc drives the belt to move, the belt drives the threaded rod to rotate, the threaded rod rotates in the movable hole inner wall of the placement plate, and the threaded rod also rotates in the inner wall of the scraper, the scraper is moved by the threaded rod, the scraper slides on the inner surface of the air preheater, and the scraper also moves on the surface of the guide pipe through the scraping hole.

[0015] 2. When cleaning the air preheater and duct, this utility model pushes the push bar to move the sealing plate. The sealing plate slides on the inner surface of the placement block. When the sealing plate moves, it will cause the spring to stretch. After the sealing plate moves to the appropriate position, the cleaning device is activated and the dust will fall from the opening of the air preheater. After cleaning is completed, the push bar spring is released and rebounds. The spring drives the sealing plate to move. The sealing plate is fitted onto the surface of the support bar. By setting the entire device, the air preheater can be sealed, and at the same time, it is convenient for the air preheater to discharge flue gas. Attached Figure Description

[0016] 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.

[0017] Figure 1 A three-dimensional structural diagram of the hollow preheater in a self-cleaning air preheater;

[0018] Figure 2 For self-cleaning air preheaters Figure 1 A schematic diagram of the structure at point A;

[0019] Figure 3 A cross-sectional structural diagram of the hollow preheater in a self-cleaning air preheater;

[0020] Figure 4 For self-cleaning air preheaters Figure 3 A schematic diagram of the structure at point B;

[0021] Figure 5 A bottom view of the hollow preheater in a self-cleaning air preheater;

[0022] Figure 6 For self-cleaning air preheaters Figure 5 A schematic diagram of the structure at point C.

[0023] In the diagram: 1. Air preheater; 2. Conduit; 3. Air circulation section; 4. Flue gas circulation section; 5. Cleaning device; 51. Placement plate; 52. Threaded rod; 53. Scraper; 54. Scraping hole; 55. Fixing belt; 56. Motor; 57. Turntable; 58. Belt; 59. Movable hole; 6. Sealing device; 61. Placement block; 62. Sealing plate; 63. Support bar; 64. Push bar; 65. Spring. Detailed Implementation

[0024] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0025] Please refer to Figures 1-6 As shown in the drawings, the self-cleaning air preheater comprises an air preheater 1 and a cleaning device 5, the inner surface of the air preheater 1 is communicated with a plurality of pipes 2, the two sides of the air preheater 1 are fixedly connected with air flow passages 3, and the upper and lower ends of the air preheater 1 are fixedly connected with flue gas flow passages 4; the surface of the air preheater 1 is provided with the cleaning device 5, the cleaning device 5 comprises two placement plates 51, the side walls of the two placement plates 51 are fixedly connected with the two sides of the air preheater 1 respectively, the inner surface of the placement plate 51 is rotatably connected with a threaded rod 52, the surface of the two threaded rods 52 is threadedly connected with scrapers 53, the surface of the scraper 53 is slidably connected with the inner surface of the air preheater 1, and the scraper 53 is provided with a scraping hole 54 close to the position of the pipe 2; and the inner wall of the scraping hole 54 of the scraper 53 is slidably connected with the surface of the pipe 2. When working, the two threaded rods 52 are rotated on the inner surface of the placement plate 51 and the inner wall of the scraper 53, and the scraper 53 moves on the surface of the pipe 2 through the scraping hole 54, so that the pipe 2 can be cleaned through the placement plate 51, the threaded rod 52, the scraper 53 and the scraping hole 54.

[0026] The side wall of the placement plate 51 is fixedly connected with a fixing belt 55, the inner surface of the fixing belt 55 is fixedly connected with a motor 56, and the motor 56 is located on the side wall of the placement plate 51. When working, the motor 56 is attached to the placement plate 51, and then the fixing belt 55 is fixed on the surface of the motor 56 and the side wall of the placement plate 51, so that the motor 56 can be fixed through the fixing belt 55.

[0027] The output end of the motor 56 is fixedly connected with a rotating disc 57, and the surface of the rotating disc 57 and the threaded rod 52 is engaged with a belt 58. When working, the motor 56 drives the rotating disc 57 to rotate, the rotating disc 57 drives the belt 58 to move, and the belt 58 drives the threaded rod 52 to rotate, so that the threaded rod 52 can be driven to rotate through the motor 56, the rotating disc 57 and the belt 58.

[0028] The surface of the placement plate 51 is provided with a movable hole 59 close to the position of the threaded rod 52, and the inner wall of the movable hole 59 of the placement plate 51 is rotatably connected with the surface of the threaded rod 52. When working, the threaded rod 52 rotates on the inner wall of the movable hole 59 of the placement plate 51, and the movable hole 59 can facilitate the rotation of the threaded rod 52.

[0029] The surface of the air preheater 1 is provided with a placing groove, and the inner wall of the placing groove of the air preheater 1 is slidably connected with the surface of the scraper 53; during operation, the scraper 53 slides on the inner wall of the placing groove of the air preheater 1, and the placing groove can facilitate the movement of the scraper 53.

[0030] The bottom end of the air preheater 1 is provided with a sealing device 6, the sealing device 6 comprises two placing blocks 61, the upper surfaces of the two placing blocks 61 are fixedly connected with the bottom end of the air preheater 1, the inner walls of the two placing blocks 61 are slidably connected with sealing plates 62, and the sealing plates 62 are located at the bottom end of the air preheater 1; during operation, the sealing plates 62 are pushed to slide on the inner surfaces of the placing blocks 61, the sealing plates 62 are moved to appropriate positions to clean the air preheater 1, the sealing plates 62 are pushed after cleaning, the sealing plates 62 slide on the inner walls of the placing blocks 61, and the sealing plates 62 slide to the original positions, so that the placing blocks 61 and the sealing plates 62 can facilitate the discharge of the slag and seal the air preheater 1.

[0031] The bottom end of the air preheater 1 is fixedly connected with a supporting strip 63, and the supporting strip 63 is inserted into the inner wall of the sealing plate 62; during operation, the sealing plate 62 is sleeved on the surface of the supporting strip 63, and the supporting strip 63 can support the sealing plate 62.

[0032] The bottom end of the sealing plate 62 is fixedly connected with a pushing strip 64, and the inner surface of the sealing plate 62 and the side wall of the placing block 61 are fixedly connected with a plurality of springs 65; during operation, the pushing strip 64 is pushed to move the sealing plate 62, and the sealing plate 62 stretches the springs 65, after cleaning, the springs 65 will rebound when the pushing strip 64 is released, and the springs 65 can drive the sealing plate 62 to move.

[0033] The working principle is that when the air preheater 1 needs to be cleaned, the motor 56 in the fixed belt 55 is started, the motor 56 drives the rotating disc 57 to rotate, the rotating disc 57 drives the belt 58 to move, the belt 58 drives the threaded rod 52 to rotate, the threaded rod 52 rotates in the movable hole 59 of the placing plate 51 and also rotates in the scraper 53, the scraper 53 is moved by the threaded rod 52, the scraper 53 slides on the inner surface of the air preheater 1, and the scraper 53 also moves on the surface of the duct 2 through the scraping hole 54, after cleaning, the scraper 53 is moved to the original position, the whole device is arranged to clean the air preheater 1, reduce the situation that flue gas residues are attached to the air preheater 1 and the duct 2, and thus reduce the influence on the heat exchange efficiency; when the air preheater 1 and the duct 2 are cleaned, the push bar 64 is pushed to drive the sealing plate 62 to move, the sealing plate 62 slides on the inner surface of the placing block 61, and the sealing plate 62 drives the spring 65 to stretch when moving, after the sealing plate 62 moves to the appropriate position, the cleaning device 5 is started, dust falls from the opening of the air preheater 1, after cleaning, the push bar 64 is loosened, the spring 65 rebounds, the spring 65 drives the sealing plate 62 to move, and the sealing plate 62 is sleeved on the surface of the supporting bar 63, the whole device is arranged to seal the air preheater 1, and the air preheater 1 is convenient to discharge dust.

[0034] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does 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.

[0035] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A self-cleaning air preheater, comprising an air preheater (1) and a cleaning device (5), the inner surface of the air preheater (1) is communicated with a plurality of pipes (2), both sides of the air preheater (1) are fixedly connected with air flow passages (3), and the upper and lower ends of the air preheater (1) are fixedly connected with flue gas flow passages (4); characterized in that: The surface of the air preheater (1) is provided with a cleaning device (5), the cleaning device (5) comprises two placing plates (51), the side walls of the two placing plates (51) are fixedly connected with the two sides of the air preheater (1) respectively, the inner surfaces of the placing plates (51) are rotatably connected with threaded rods (52), the surfaces of the two threaded rods (52) are threadedly connected with scrapers (53), the surfaces of the scrapers (53) are slidably connected with the inner surfaces of the air preheater (1), the surfaces of the scrapers (53) are provided with scraping holes (54) near the positions of the ducts (2), and the inner walls of the scraping holes (54) of the scrapers (53) are slidably connected with the surfaces of the ducts (2). ​ 2. The self-cleaning air preheater of claim 1, wherein: The side walls of the placing plates (51) are fixedly connected with fixing bands (55), the inner surfaces of the fixing bands (55) are fixedly connected with motors (56), and the motors (56) are located on the side walls of the placing plates (51).

3. The self-cleaning air preheater of claim 2, wherein: The output ends of the motors (56) are fixedly connected with rotating discs (57), and the surfaces of the rotating discs (57) and the threaded rods (52) are engaged with belts (58).

4. The self-cleaning air preheater of claim 1, wherein: The surfaces of the placing plates (51) are provided with movable holes (59) near the positions of the threaded rods (52), and the inner walls of the movable holes (59) of the placing plates (51) are rotatably connected with the surfaces of the threaded rods (52).

5. The self-cleaning air preheater of claim 1, wherein: The surface of the air preheater (1) is provided with a placing groove, and the inner wall of the placing groove of the air preheater (1) is slidably connected with the surface of the scraper (53).

6. The self-cleaning air preheater of claim 1, wherein: The bottom end of the air preheater (1) is provided with a sealing device (6), the sealing device (6) comprises two placing blocks (61), the upper surfaces of the two placing blocks (61) are fixedly connected with the bottom end of the air preheater (1), the inner walls of the two placing blocks (61) are slidably connected with sealing plates (62), and the sealing plates (62) are located at the bottom end of the air preheater (1).

7. The self-cleaning air preheater of claim 6, wherein: The bottom end of the air preheater (1) is fixedly connected with a supporting strip (63), and the supporting strip (63) is inserted into the inner wall of the sealing plate (62).

8. The self-cleaning air preheater of claim 6, wherein: The bottom end of the sealing plate (62) is fixedly connected with a pushing strip (64), and the inner surface of the sealing plate (62) and the side wall of the placing block (61) are fixedly connected with a plurality of springs (65).

Images