Ash removal device of air pre-heater

Abstract

The utility model provides a dust removal device of an air pre-heater, and relates to the field of dust removal equipment, the dust removal device of the air pre-heater comprises two guide rails and two mounting racks, the two guide rails are both installed between two flue walls, the two mounting racks are both movably connected to the two guide rails, and the mounting racks can move along the guide rails under the action of a driving device. Connecting plates are fixedly connected to the two ends of the two mounting frames, vibration devices are mounted at the two ends of the tops of the mounting frames, a mounting frame is jointly connected to the tops of the two vibration devices, lifting devices are fixedly connected to the two ends of the top of the mounting frame, and a top plate is mounted between the two lifting devices. According to the dust removal device of the air pre-heater, the scraping plates move up and down in a reciprocating mode and vibrate while moving along the guide rails, impurities are more prone to falling off through shaking when making contact with the vibrating scraping plates, and the impurities attached to the scraping plates are prone to falling off.

Description

Technical Field

[0001] The utility model relates to the field of dust removal equipment, in particular to a dust removal device for an air preheater. Background Art

[0002] Air preheater is a preheating device that improves the heat exchange performance of steam boilers and reduces heat loss. It uses the flue gas discharged from the tail flue of the boiler to preheat the air before entering the boiler to a certain temperature through the internal heat sink, helping the boiler to improve combustion efficiency. Air preheaters are generally divided into three types: plate type, rotary type and tube type.

[0003] As boiler emission requirements become increasingly stringent, low-nitrogen combustion in circulating fluidized beds is becoming more and more popular. Since low-nitrogen combustion requires improving the separator efficiency of the boiler separator, the ash particle size in the boiler tail flue is getting smaller and smaller. At low load, due to the low flue gas flow rate, fine ash is very easy to precipitate in the air preheater. Therefore, for the normal use of the air preheater, the air preheater needs to be deashed.

[0004] When the existing dust removal device is in use, the driving device drives the mounting frame to move on the guide rail, and the multiple scrapers installed on the mounting frame are used to clean the impurities at the intervals between the heat exchange tubes. However, the scraper only moves in a linear manner, which has a poor cleaning effect on impurities. Therefore, when the existing dust removal device is in use, the lifting device generally drives the scraper to move up and down, so that the scraper moves up and down while moving along the guide rail. The scraper with this movement method improves the cleaning effect to a certain extent. However, for some impurities with strong adhesion, the cleaning effect still does not meet expectations, and the scraped impurities are easily attached to the scraper.

[0005] Therefore, it is necessary to provide a new dust removal device for air preheater to solve the above technical problems. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a dust removal device for an air preheater.

[0007] The utility model provides an air preheater ash removal device, which is installed on two flue walls and includes two guide rails and two mounting frames, the two guide rails are installed between the two flue walls, the two mounting frames are movably connected to the two guide rails, and the mounting frames can move along the guide rails under the action of a driving device, the two ends of the two mounting frames are fixedly connected with connecting plates, the top ends of the mounting frames are installed with vibration devices, the tops of the two vibration devices are commonly connected with a mounting frame, the top ends of the mounting frames are fixedly connected with lifting devices, a top plate is installed between the two lifting devices, and a plurality of scrapers for ash removal are fixedly connected to the bottom of the top plate;

[0008] The vibration device includes a first motor, an eccentric wheel and two elastic members. The first motor is fixedly installed on the top of the mounting frame, and the output end of the first motor is fixedly connected to the eccentric wheel. The two elastic members are respectively arranged on both sides of the first motor, and the two ends of the elastic members are respectively fixedly connected to the mounting frame and the mounting frame.

[0009] Preferably, the elastic member includes a telescopic rod and a spring, one end of the telescopic rod is fixedly connected to the top of the mounting frame, the telescopic end of the telescopic rod is fixedly connected to the bottom of the mounting frame, the spring is movably mounted on the telescopic rod, and both ends of the spring are respectively fixedly connected to the top of the mounting frame and the bottom of the mounting frame.

[0010] Preferably, the lifting device includes a second motor, a rotating plate, a movable frame and two guide frames, the bottom of the second motor is fixedly connected to the top of the mounting frame, the output end of the second motor is fixedly connected to one end of the rotating plate, the other end of the rotating plate is fixedly connected to a connecting rod, one end of the connecting rod is movably arranged in the inner cavity of the movable frame, the two guide frames are respectively fixedly connected to the two ends of the movable frame, and the guide frames are movably inserted into the through holes opened in the mounting frame.

[0011] Preferably, a sleeve is movably mounted on one end of the connecting rod away from the rotating plate, and the sleeve is arranged in the inner cavity of the movable frame.

[0012] Preferably, two ends of the top plate are respectively fixedly connected to the side walls of the two movable frames.

[0013] Preferably, one end of the scraper has a serrated structure.

[0014] Compared with the related art, the dust removal device of the air preheater provided by the utility model has the following beneficial effects:

[0015] By setting up a lifting device, the top plate and multiple scrapers on the top plate can move up and down, and the eccentric wheel is driven to rotate by the first motor, and the elastic member is extended and retracted, so that the eccentric wheel continuously knocks the installation frame to achieve the vibration of the installation frame, thereby causing the multiple scrapers to vibrate. When the device is used for dust removal, the scraper moves along the guide rail and reciprocates up and down and vibrates at the same time. When impurities come into contact with the vibrating scraper, they are more likely to fall off due to shaking, and due to the continuous vibration of the scraper, the impurities attached to the scraper are easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the dust removal device for the air preheater provided by the utility model;

[0017] Figure 2 for Figure 1 A schematic structural diagram of the structure shown from another angle;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the mounting frame, the vibrating device, the lifting device, the top plate and the plurality of scrapers shown;

[0019] Figure 4 for Figure 3 Schematic diagram of the structure at A shown.

[0020] Numbers in the figure: 1. flue wall; 2. mounting frame; 3. connecting plate; 4. first motor; 5. eccentric wheel; 6. telescopic rod; 7. spring; 8. scraper; 9. mounting frame; 10. second motor; 11. rotating plate; 12. connecting rod; 13. sleeve; 14. movable frame; 15. top plate; 16. guide frame; 17. guide rail. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A schematic diagram of the structure of the dust removal device for the air preheater provided by the utility model; Figure 2 for Figure 1 A schematic structural diagram of the structure shown from another angle; Figure 3 for Figure 1 A schematic diagram of the structure of the mounting frame, the vibrating device, the lifting device, the top plate and the plurality of scrapers shown; Figure 4 for Figure 3 Schematic diagram of the structure at A shown.

[0023] In the specific implementation process, Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the device is installed on two flue walls 1, including two guide rails 17 and two mounting frames 2, the two guide rails 17 are installed between the two flue walls 1, the two mounting frames 2 are movably connected to the two guide rails 17, and the mounting frames 2 can move along the guide rails 17 under the action of the driving device, the two ends of the two mounting frames 2 are fixedly connected with connecting plates 3, the top ends of the mounting frames 2 are installed with vibration devices, the tops of the two vibration devices are commonly connected with a mounting frame 9, the top ends of the mounting frame 9 are fixedly connected with a lifting device, a top plate 15 is installed between the two lifting devices, and a plurality of scrapers 8 for ash removal are fixedly connected to the bottom of the top plate 15, one end of the scraper 8 is a serrated structure, and the vibration device includes a first motor 4, an eccentric wheel 5 and two Elastic member, the first motor 4 is fixedly mounted on the top of the mounting frame 2, the output end of the first motor 4 is fixedly connected to the eccentric wheel 5, two elastic members are respectively arranged on both sides of the first motor 4, and the two ends of the elastic member are respectively fixedly connected to the mounting frame 2 and the mounting frame 9, the elastic member includes a telescopic rod 6 and a spring 7, one end of the telescopic rod 6 is fixedly connected to the top of the mounting frame 2, and the telescopic end of the telescopic rod 6 is fixedly connected to the bottom of the mounting frame 9, the spring 7 is movably sleeved on the telescopic rod 6, and the two ends of the spring 7 are respectively fixedly connected to the top of the mounting frame 2 and the bottom of the mounting frame 9, the eccentric wheel 5 is driven to rotate by the first motor 4, and the telescopic rod 6 and the spring 7 are extended and retracted, so that the eccentric wheel 5 continuously knocks the mounting frame 9, so as to realize the vibration of the mounting frame 9, thereby causing the multiple scrapers 8 to vibrate;

[0024] The lifting device includes a second motor 10, a rotating plate 11, a movable frame 14 and two guide frames 16. The bottom of the second motor 10 is fixedly connected to the top of the installation frame 9, the output end of the second motor 10 is fixedly connected to one end of the rotating plate 11, and the other end of the rotating plate 11 is fixedly connected to a connecting rod 12. One end of the connecting rod 12 is movably arranged in the inner cavity of the movable frame 14, and the end of the connecting rod 12 away from the rotating plate 11 is movably sleeved with a sleeve 13, and the sleeve 13 is arranged in the inner cavity of the movable frame 14. The two guide frames 16 are respectively fixedly connected to the two ends of the movable frame 14, and the guide frames 16 are movably inserted into the through holes provided in the installation frame 9. The two ends of the top plate 15 are respectively fixedly connected to the side walls of the two movable frames 14. The rotating plate 11 is driven to rotate by the second motor 10, and the rotating plate 11 drives the connecting rod 12 and the sleeve 13 to rotate. The sleeve 13 moves in the inner cavity of the movable frame 14. Under the action of the two guide frames 16, the movable frame 14 realizes reciprocating up and down movement;

[0025] The working principle provided by the utility model is as follows: when the device is used, the rotating plate 11 is driven to rotate by the second motor 10, and the rotating plate 11 drives the connecting rod 12 and the sleeve 13 to rotate, and the sleeve 13 moves in the inner cavity of the movable frame 14. Under the action of the two guide frames 16, the movable frame 14 is made to move up and down reciprocatingly, and the top plate 15 and the multiple scrapers 8 on the top plate 15 are driven by the movable frame 14 to move up and down. At the same time, the eccentric wheel 5 is driven to rotate by the first motor 4, and the telescopic rod 6 and the spring 7 are telescoped, so that the eccentric wheel 5 continuously knocks the mounting frame 9 to achieve the vibration of the mounting frame 9, thereby causing the multiple scrapers 8 to vibrate. When the device is used for dust removal, the scraper 8 moves along the guide rail 17 while reciprocating up and down and vibrating. When impurities contact the vibrating scraper 8, they are more likely to fall off through shaking, and due to the continuous vibration of the scraper 8, the impurities attached to the scraper 8 are easy to fall off.

[0026] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0027] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An air preheater dust removal device, the device is installed on two flue walls (1), comprising two guide rails (17) and two mounting frames (2), the two guide rails (17) are installed between the two flue walls (1), the two mounting frames (2) are movably connected to the two guide rails (17), and the mounting frames (2) can move along the guide rails (17) under the action of a driving device, and the two ends of the two mounting frames (2) are fixedly connected with a connecting plate (3), characterized in that: Vibration devices are installed at both ends of the top of the mounting frame (2); the tops of the two vibration devices are commonly connected to a mounting frame (9); both ends of the top of the mounting frame (9) are fixedly connected to lifting devices; a top plate (15) is installed between the two lifting devices; and a plurality of scrapers (8) for dust removal are fixedly connected to the bottom of the top plate (15); The vibration device comprises a first motor (4), an eccentric wheel (5) and two elastic members, wherein the first motor (4) is fixedly mounted on the top of the mounting frame (2), the output end of the first motor (4) is fixedly connected to the eccentric wheel (5), the two elastic members are respectively arranged on both sides of the first motor (4), and the two ends of the elastic members are respectively fixedly connected to the mounting frame (2) and the mounting frame (9).

2. The dust removal device for air preheater according to claim 1 is characterized in that: The elastic member comprises a telescopic rod (6) and a spring (7); one end of the telescopic rod (6) is fixedly connected to the top of the mounting frame (2); the telescopic end of the telescopic rod (6) is fixedly connected to the bottom of the mounting frame (9); the spring (7) is movably sleeved on the telescopic rod (6); and the two ends of the spring (7) are respectively fixedly connected to the top of the mounting frame (2) and the bottom of the mounting frame (9).

3. The dust removal device of the air preheater according to claim 2 is characterized in that: The lifting device comprises a second motor (10), a rotating plate (11), a movable frame (14) and two guide frames (16); the bottom of the second motor (10) is fixedly connected to the top of the mounting frame (9); the output end of the second motor (10) is fixedly connected to one end of the rotating plate (11); the other end of the rotating plate (11) is fixedly connected to a connecting rod (12); one end of the connecting rod (12) is movably arranged in the inner cavity of the movable frame (14); the two guide frames (16) are respectively fixedly connected to the two ends of the movable frame (14); and the guide frames (16) are movably inserted into through holes provided in the mounting frame (9).

4. The dust removal device for air preheater according to claim 3 is characterized in that: A sleeve (13) is movably sleeved on one end of the connecting rod (12) away from the rotating plate (11), and the sleeve (13) is arranged in the inner cavity of the movable frame (14).

5. The dust removal device for air preheater according to claim 4 is characterized in that: The two ends of the top plate (15) are respectively fixedly connected to the side walls of the two movable frames (14).

6. The dust removal device for air preheater according to claim 5, characterized in that: One end of the scraper (8) has a sawtooth structure.

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