Automatic ash removal device for rotary air pre-heater

Abstract

The utility model relates to the technical field of rotary air pre-heaters, in particular to an automatic ash cleaning device for a rotary air pre-heater, which is characterized in that an external water pump is matched with a water inlet pipe to work, so that a water source can be conveyed into a cleaning frame, and then the water source is sprayed out through a spray head in the cleaning frame to clean smoke dust on a rotary air pre-heater body. When the water source enters the cleaning frame, the first rotating blade and the second rotating blade are driven to rotate, and the cleaning disc at the bottom of the second rotating blade is further driven to rotate; the rotary air pre-heater body is provided with the cleaning disc, so that the nozzle can be matched with the cleaning disc to work while cleaning the rotary air pre-heater body, viscous substances are prevented from being adhered to the top of the rotor, the first rotating blade can rotate to drive the cleaning roller and the first gear to rotate, and the viscous substances on the outer wall of the rotary air pre-heater body can be cleaned through the cleaning roller.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary air preheaters, in particular to an automatic dust cleaning device for rotary air preheaters. Background Art

[0002] There are two types of air preheaters widely used in power plant boilers: tubular and rotary. The rotary air preheater transfers heat in a regenerative manner, with flue gas and air alternately flowing through the heating surface of the rotor inside the preheater to achieve heat transfer. It is a device used to improve the heat exchange performance of the boiler and reduce energy consumption.

[0003] The public document with publication number CN216307848U discloses an efficient and safe rotary air preheater, including an outer shell, a rotor and an upper guide shaft, the outer wall of the outer shell is symmetrically installed with a metal groove, the inner side of the metal groove is rotatably connected to a screw rod, and guide rods are welded on both sides of the screw rod, and the outer end of the metal groove is installed with a forward and reverse motor, and a slider is installed at the outer wall of the guide rod, and the upper surface of the slider is fixedly connected to the shell, the side wall of the shell is conductively connected to a metal pipe, and the top of the shell is conductively connected to a two-way joint. The utility model adjusts the metal pipe to just above the rotor, and sprays the water inside the metal pipe in the form of water mist under the action of pressure through a fan-shaped high-pressure nozzle, and the sprayed water mist is fan-shaped, thereby cleaning the rotating rotor, eliminating the tedious operation of manual cleaning, which is not only safe but also improves efficiency.

[0004] The above-mentioned document uses high-pressure spray to clean the smoke dust adhering to the rotor, but after the high-pressure water flow is sprayed into the air preheater, the humidity of the flue gas will increase, the dew point of the flue gas will increase, and after the water is vaporized, the exhaust gas temperature will decrease and tend to the water dew point. This increase in humidity may make certain components in the smoke dust (such as certain metal oxides or salts) more easily combine with water to form sticky substances, and these sticky substances will easily adhere to the top and outer wall of the rotor and are not easy to fall off. Utility Model Content

[0005] In response to the above problems, an automatic dust cleaning device for a rotary air preheater is provided. An external water pump cooperates with a water inlet pipe to transport water to the inside of a cleaning frame, and then sprays it out through a nozzle inside the cleaning frame to clean the smoke and dust on the rotary air preheater body. When the water enters the cleaning frame, it drives the first rotating blade and the second rotating blade to rotate, and further drives the cleaning disk at the bottom of the second rotating blade to rotate. Since the bottom of the cleaning disk is a brush surface and conflicts with the rotor in the rotary air preheater body, the nozzle can cooperate with the cleaning disk while cleaning the rotary air preheater body to prevent sticky substances from adhering to the top of the rotor. The rotation of the first rotating blade can drive the cleaning roller and the first gear to rotate.

[0006] In order to solve the problems of the prior art, the utility model provides an automatic dust cleaning device for a rotary air preheater, comprising a shell, a rotary air preheater body is rotatably arranged inside the shell, a cleaning frame is provided on the top of the shell, the top of the cleaning frame is connected to a water inlet pipe, a first rotating blade and a second rotating blade are rotatably arranged inside the cleaning frame, a cleaning disk is rotatably arranged at the bottom of the cleaning frame, and the bottom of the cleaning frame is connected to a nozzle.

[0007] Preferably, the bottom of the cleaning disc is a brush surface and contacts the rotor in the rotary air preheater body.

[0008] Preferably, a connecting rod is provided at the bottom of the first rotating blade, the bottom of the connecting rod extends to the outside of the cleaning frame and is provided with a cleaning roller, and the brush surface of the cleaning roller is in conflict with the outer wall of the rotary air preheater body.

[0009] Preferably, a first gear is rotatably provided at the bottom of the cleaning roller, a gear ring is rotatably provided inside the housing and is meshed with the first gear, and a plurality of scraping blocks are provided inside the gear ring.

[0010] Preferably, the bottom of the shell is provided with through holes for air intake and dust cleaning.

[0011] Preferably, a second gear meshing with the gear ring is rotatably provided inside the shell, a rotating rod is provided on the top of the second gear, a plurality of sleeves are provided on the outside of the rotating rod, a spring is provided inside the sleeve, and a resistance rod is provided at the other end of the spring.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The water source can be transported to the interior of the cleaning frame through the external water pump in conjunction with the water inlet pipe, and then sprayed out through the nozzle inside the cleaning frame to clean the smoke and dust on the rotary air preheater body. When the water source enters the interior of the cleaning frame, it will drive the first rotating blade and the second rotating blade to rotate, and further drive the cleaning disk at the bottom of the second rotating blade to rotate. Since the bottom of the cleaning disk is a brush surface and conflicts with the rotor in the rotary air preheater body, the nozzle can cooperate with the cleaning disk while cleaning the rotary air preheater body to prevent sticky substances from adhering to the top of the rotor. The rotation of the first rotating blade can drive the cleaning roller and the first gear to rotate. The cleaning roller can be used to clean the sticky substances on the outer wall of the rotary air preheater body. The rotation of the first gear can drive the gear ring and the scraper inside it to rotate. The scraper can be used to remove the sticky substances that fall into the cleaning frame and discharge them from the interior of the shell through the through hole.

[0014] 2. The rotation of the gear ring can drive the second gear to rotate, and further drive the rotating rod and sleeve on the top of the second gear to rotate. While the sleeve is rotating, it will also drive the resistance rod to knock on the outer wall of the rotary air preheater body. Since the resistance rod is arranged inside the sleeve through the activity of a spring, the rotating rod will continuously drive the resistance rod to knock on the outer wall of the rotary air preheater body when it rotates. Through continuous knocking, it is easier to clean some smoke and dust on the outer wall of the rotary air preheater body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of the overall structure of an automatic dust cleaning device for a rotary air preheater.

[0016] Figure 2 The diagram is a top view of the structure of an automatic dust cleaning device for a rotary air preheater.

[0017] Figure 3 The present invention is a schematic diagram of the internal structure of the shell of an automatic dust cleaning device for a rotary air preheater.

[0018] Figure 4 The present invention is a structural diagram of the gear ring and scraper block in an automatic dust cleaning device for a rotary air preheater.

[0019] Figure 5 The present invention is a schematic diagram of the internal structure of a cleaning frame in an automatic dust cleaning device for a rotary air preheater.

[0020] Figure 6 The present invention is a structural diagram of a spring and a resistance rod in an automatic dust cleaning device for a rotary air preheater.

[0021] The numbers in the figure are: 1. Shell; 2. Rotary air preheater body; 3. Cleaning frame; 4. Water inlet pipe; 5. First gear; 6. Cleaning roller; 7. Connecting rod; 8. Nozzle; 9. Cleaning disc; 10. Gear ring; 11. Scraper; 12. Second gear; 13. Rotating rod; 14. First rotating blade; 15. Second rotating blade; 16. Sleeve; 17. Resistance rod; 18. Spring. DETAILED DESCRIPTION

[0022] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figures 1 to 6 As shown, the utility model provides:

[0024] An automatic dust cleaning device for a rotary air preheater includes a shell 1, a rotary air preheater body 2 is rotatably provided inside the shell 1, a cleaning frame 3 is provided on the top of the shell 1, the top of the cleaning frame 3 is connected to a water inlet pipe 4, a first rotating blade 14 and a second rotating blade 15 are rotatably provided inside the cleaning frame 3, a cleaning disc 9 is rotatably provided at the bottom of the cleaning frame 3, and the bottom of the cleaning frame 3 is connected to a nozzle 8.

[0025] By using an external water pump, coupled with the operation of the water inlet pipe 4, water can be effectively transported to the interior of the cleaning frame 3. Once the water enters the cleaning frame 3, the internal nozzle 8 begins spraying, effectively cleaning the accumulated soot on the rotary air preheater body 2. During this process, as the water enters the cleaning frame 3, it triggers the rotation of the first and second rotating blades 14, 15. This rotational movement further prompts the cleaning disc 9 at the bottom of the second rotating blade 15 to begin rotating. The coordinated operation of the nozzle 8 and the cleaning disc 9 effectively prevents sticky substances from adhering to the top of the rotor, ensuring the cleanliness and efficient operation of the equipment.

[0026] like Figure 4 As shown, the bottom of the cleaning disc 9 is a brush surface, and it conflicts with the rotor in the rotary air preheater body 2.

[0027] During rotor cleaning with cleaning disc 9, the brush surface on its bottom effectively protects the rotor surface, minimizing wear and tear during the cleaning process. This ensures the rotor remains in excellent condition after cleaning, extending its service life. The soft material and rational structural design of the brush surface ensure efficient and gentle cleaning, preventing scratches or damage to the rotor surface that could be caused by hard materials. In this way, cleaning disc 9 not only improves cleaning effectiveness but also ensures rotor integrity and stable performance.

[0028] like Figure 3 and Figure 4 As shown, a connecting rod 7 is provided at the bottom of the first rotating blade 14 , and the bottom of the connecting rod 7 extends to the outside of the cleaning frame 3 and is provided with a cleaning roller 6 , and the brush surface of the cleaning roller 6 contacts the outer wall of the rotary air preheater body 2 .

[0029] The rotation of the first rotating blade 14 can effectively drive the cleaning roller 6 and the first gear 5 to rotate accordingly, so that the cleaning roller 6 can fully exert its cleaning function and thoroughly clean the sticky substances attached to the outer wall of the rotary air preheater body 2.

[0030] like Figure 4As shown, a first gear 5 is rotatably provided at the bottom of the cleaning roller 6 , a gear ring 10 is rotatably provided inside the housing 1 and is meshed with the first gear 5 , and a plurality of scrapers 11 are provided inside the gear ring 10 .

[0031] The rotation of the first gear 5 effectively drives the gear ring 10 and its internal scraper 11 to rotate accordingly. This allows the scraper 11 to perform its cleaning function, effectively removing sticky substances that have fallen into the cleaning frame 3. As the scraper 11 continues to move, this sticky substance is gradually scraped off and discharged through the through-holes in the cleaning frame 3, ultimately smoothly exiting the interior of the housing 1, thereby maintaining the cleanliness of the device and ensuring smooth operation.

[0032] like Figure 5 and Figure 3 As shown, the bottom of the housing 1 is provided with through holes for air intake and dust cleaning.

[0033] The through hole allows easy discharge of dropped sticky material.

[0034] like Figure 4 and Figure 6 As shown, a second gear 12 is rotatably provided inside the housing 1 and is meshed with the gear ring 10. A rotating rod 13 is provided on the top of the second gear 12. Several sleeves 16 are provided on the outside of the rotating rod 13. A spring 18 is provided inside the sleeve 16, and a resisting rod 17 is provided on the other end of the spring 18.

[0035] The rotational movement of the gear ring 10 can effectively drive the second gear 12 to rotate accordingly. As the second gear 12 rotates, the rotating rod 13 and sleeve 16 on its top will also rotate accordingly. During the rotation of the sleeve 16, the interference rod 17 is driven to knock the outer wall of the rotary air preheater body 2. Since the interference rod 17 is flexibly arranged inside the sleeve 16 by the spring 18, when the rotating rod 13 continues to rotate, the interference rod 17 will also continuously knock the outer wall of the rotary air preheater body 2. This continuous knocking action makes it easier to clean the smoke and dust on the outer wall of the rotary air preheater body 2, thereby improving the cleaning efficiency.

[0036] The above embodiments merely illustrate one or several implementations of the automatic dust cleaning device for a rotary air preheater of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art will be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An automatic dust cleaning device for a rotary air preheater, characterized in that: The invention comprises a shell (1), wherein a rotary air preheater body (2) is rotatably provided inside the shell (1), a cleaning frame (3) is provided on the top of the shell (1), the top of the cleaning frame (3) is connected to a water inlet pipe (4), a first rotating blade (14) and a second rotating blade (15) are rotatably provided inside the cleaning frame (3), a cleaning disc (9) is rotatably provided at the bottom of the cleaning frame (3), and the bottom of the cleaning frame (3) is connected to a nozzle (8).

2. The automatic dust cleaning device for a rotary air preheater according to claim 1, characterized in that: The bottom of the cleaning disc (9) is a brush surface and contacts the rotor in the rotary air preheater body (2).

3. The automatic dust cleaning device for a rotary air preheater according to claim 1, characterized in that: A connecting rod (7) is provided at the bottom of the first rotating blade (14), the bottom of the connecting rod (7) extends to the outside of the cleaning frame (3) and is provided with a cleaning roller (6), and the brush surface of the cleaning roller (6) contacts the outer wall of the rotary air preheater body (2).

4. The automatic dust cleaning device for a rotary air preheater according to claim 3, characterized in that: A first gear (5) is rotatably provided at the bottom of the cleaning roller (6), a gear ring (10) meshingly connected with the first gear (5) is rotatably provided inside the housing (1), and a plurality of scraping blocks (11) are provided inside the gear ring (10).

5. The automatic dust cleaning device for a rotary air preheater according to claim 1, characterized in that: The bottom of the housing (1) is provided with through holes for air intake and smoke cleaning.

6. The automatic dust cleaning device for a rotary air preheater according to claim 1, characterized in that: A second gear (12) meshing with the gear ring (10) is rotatably provided inside the housing (1), a rotating rod (13) is provided on the top of the second gear (12), a plurality of sleeves (16) are provided on the outside of the rotating rod (13), a spring (18) is provided inside the sleeve (16), and a resisting rod (17) is provided at the other end of the spring (18).

Images