An efficient furnace ash removal device and a method for applying the same to a thermal power boiler

Abstract

This invention discloses a high-efficiency furnace ash removal device and its application in a thermal power boiler, relating to the field of boiler technology. It includes a boiler body and a material discharge mechanism installed inside the boiler body. A heat exchange tube is connected to the boiler body, and a closing assembly is installed between the push plate and the boiler body. A scraping mechanism is connected to the heat exchange tube, and a cleaning mechanism is connected to the scraper. In this invention, after the boiler body has stopped and dissipated heat, the forklift lift is extended, and the first and second rotating plates rotate downwards under gravity, facilitating the discharge of furnace ash from the boiler body through the material discharge port. A connecting rod drives the scraper to move upwards along the heat exchange tube, thereby removing the tar ash adhering to the heat exchange tube. A rubber wheel drives a worm gear to rotate, which in turn drives a cleaning brush to rotate, further cleaning the heat exchange tube and ensuring its heat exchange efficiency.

Description

Technical Field

[0001] This invention relates to the field of boiler technology, and in particular to a high-efficiency furnace ash removal device and its application in thermal power boilers. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. A boiler consists of two main parts: the boiler itself and the furnace. The hot water or steam produced in a boiler can directly provide the heat energy needed for industrial production and daily life, or it can be converted into mechanical energy through a steam power unit, or further converted into electrical energy through a generator. Boilers that provide hot water are called hot water boilers, mainly used for domestic purposes, with some applications in industrial production.

[0003] To ensure efficient heat transfer, manual cleaning of the boiler requires workers to enter the furnace through the boiler manhole to clean the outer walls of the heat exchange tubes. Generally, boilers have good insulation and are quite hot inside, making cleaning difficult. During combustion, the tar released easily combines with coal ash and adheres to the outer walls of the heat exchange tubes, requiring scraping with a scraper. However, heat exchange tubes are generally long, and the higher parts are difficult to scrape. In addition, many heat exchange tubes are close to the furnace wall, with limited space, making it even more difficult for workers to reach and operate. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency furnace ash removal device and its application in thermal power boilers, so as to solve the problem mentioned in the background art that the volatilized tar easily combines with coal ash and adheres to the outer wall of the heat exchange tube, which is difficult to clean and requires laborious manual cleaning.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency furnace ash removal device, comprising a boiler body and a material discharge mechanism installed inside the boiler body. The boiler body is connected to a heat exchange tube. The material discharge mechanism includes a scissor lift, which is installed at the bottom of the boiler body. A push plate is installed at the lifting end of the scissor lift. A closing assembly is installed between the push plate and the boiler body. The bottom of the boiler body has a material discharge port for ash discharge. A scraping mechanism is connected to the heat exchange tube. The scraping mechanism includes a scraper, which is sleeved on the heat exchange tube and abuts against the outer wall of the heat exchange tube. A connecting rod is fixedly connected between the scraper and the push plate. A cleaning mechanism is connected to the scraper.

[0006] As a preferred embodiment of the present invention, the closing assembly includes a first rotating plate and a second rotating plate. Both ends of the push plate are rotatably connected to the first rotating plate. The inner wall of the boiler body is rotatably connected to the end of the first rotating plate. The first rotating plate and the second rotating plate are each provided with a fitting groove. The first rotating plate and the second rotating plate respectively abut against the heat exchange tube through the fitting groove. The boiler body is rotatably connected to a support rod located below the first rotating plate and the second rotating plate. One end of the support rod abuts against the bottom end of the second rotating plate, and the other end of the support rod abuts against the bottom end of the push plate. A stop block is fixedly connected to the side wall of the boiler body, abutting against the bottom end of the first rotating plate.

[0007] By adopting the above technical solution, it is easier to unload the ash inside the boiler body. Generally, the feed inlet of the boiler body is small, making it inconvenient to remove the ash.

[0008] As a preferred embodiment of the present invention, the first rotating plate and the second rotating plate are heat-insulating materials, and the pushing plate is a heat-insulating material.

[0009] By adopting the above technical solution, damage to the scraper, rubber wheel, and cleaning brush under prolonged high temperature can be avoided.

[0010] In a preferred embodiment of the present invention, the rotating end of the support rod is located below the first rotating plate, the stop block is elongated, and the bottom end of the stop block is used to abut against the first rotating plate.

[0011] By adopting the above technical solution, the stop block is supported, so that when the push plate moves downward to reset, the second rotating plate can be lifted up again, and the first rotating plate is supported at the same time.

[0012] As a preferred embodiment of the present invention, the top of the scraper has an annular frustum-shaped structure, and the connecting rod has an "L"-shaped structure.

[0013] By adopting the above technical solution, it is easy to pull the scraper through the connecting rod. The top of the scraper has a frustum-shaped structure, which can effectively distribute the scraped ash to both ends.

[0014] As a preferred embodiment of the present invention, a plurality of rotating shafts are rotatably connected to the inner side of the bottom end of the scraper, and rubber wheels are mounted on the rotating shafts. The two ends of the rotating shafts extend into the interior of the scraper, and the rims of the rubber wheels are used to roll and rub against the heat exchange tubes.

[0015] By adopting the above technical solution, the force on the scraper is ensured to be uniform, and the uneven force caused by the scraper tilting is avoided, thus preventing damage to the outer wall of the heat exchange tube.

[0016] As a preferred embodiment of the present invention, the cleaning mechanism includes a rotating ring, the bottom end of the scraper is connected to the rotating ring, the bottom end of the rotating ring is provided with a fixed ring, a support plate is fixedly connected between the fixed ring and the rotating ring, an annular cleaning brush is installed on the fixed ring, the bristles of the cleaning brush abut against the outer wall of the heat exchange tube, and a driving component for driving the rotating ring to rotate is connected to the scraper.

[0017] By adopting the above technical solution, it is easier to further clean the outer wall of the heat exchange tube using a cleaning brush.

[0018] As a preferred embodiment of the present invention, the support plate is provided in three parts, and the axis of the fixing ring coincides with the axis of the heat exchange tube.

[0019] By adopting the above technical solution, it is ensured that the cleaning brush can make uniform contact with the outer wall of the heat exchange tube.

[0020] As a preferred embodiment of the present invention, the driving assembly includes an internal gear, the scraper is rotatably connected to the bottom end of the internal gear, the rotating ring is fixedly connected to the bottom end of the internal gear, the rotating ring is rotatably connected to the scraper, and a worm gear meshing with the internal gear is rotatably connected inside the scraper, and the rotating shaft of the worm gear is connected to the rotating shaft through a universal joint.

[0021] By adopting the above technical solution, the cleaning brush can rotate while moving up and down, thereby increasing the cleaning effect.

[0022] As a preferred embodiment of the present invention, after the boiler body has stopped and dissipated heat, the forklift elevator is extended, driving the push plate to move upward. The first and second rotating plates lose their support and thus flip downward, allowing the ash to be discharged. The push plate drives the scraper to move upward along the heat exchange tube, scraping off the tar and ash adhering to the heat exchange tube. The upward movement of the scraper also drives the cleaning brush to rotate, and the cleaning brush further cleans the heat exchange tube.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. This invention, by setting up a scissor lift, a push plate, a first rotating plate, and a second rotating plate, allows the boiler body to stop and dissipate heat. After the boiler body stops, the ash is pushed onto the first rotating plate and the second rotating plate. The scissor lift is then extended, causing the push plate to move upward. As the first rotating plate and the second rotating plate lose their support, they will rotate downward under the action of gravity, thus facilitating the discharge of the ash from the boiler body through the discharge port.

[0025] 2. This invention uses a scraper and rubber wheel. The connecting rod drives the scraper to move upward along the heat exchange tube. The top of the scraper is shaped like a frustum, which helps to remove the tar and ash adhering to the heat exchange tube. The rubber wheel makes the scraper slide more stably, preventing the scraper from deviating and causing damage to the outer wall of the heat exchange tube. Multiple scrapers move at the same time, resulting in high cleaning efficiency.

[0026] 3. This invention, by setting up a worm gear and internal gear, drives the rotating shaft to rotate when the rubber wheel rotates. This changes the direction of rotation through the universal joint, driving the worm gear to rotate and driving the cleaning brush to rotate. This achieves the simultaneous upward movement of the scraper and the rotation of the cleaning brush. After the scraper removes the tar and ash adhering to the heat exchange tube, a thorough cleaning is performed again, thus ensuring the heat exchange effect of the heat exchange tube. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a partial structural schematic diagram of the first rotating plate and the second rotating plate of the present invention;

[0029] Figure 3 This is a partial structural schematic diagram of the push plate of the present invention;

[0030] Figure 4 This is a partial structural schematic diagram of the scraper of the present invention;

[0031] Figure 5 This is a partial structural schematic diagram of the rotating ring of the present invention;

[0032] Figure 6 This is a partial structural diagram of the worm gear of the present invention.

[0033] In the diagram: 1. Boiler body; 2. Unloading mechanism; 21. First rotating plate; 22. Second rotating plate; 23. Fitting groove; 24. Push plate; 25. Stop block; 26. Unloading port; 27. Forklift scissor lift; 28. Support rod; 3. Scraping mechanism; 31. Connecting rod; 32. Scraper; 33. Rubber wheel; 34. Rotating shaft; 4. Cleaning mechanism; 41. Rotating ring; 42. Support plate; 43. Fixed ring; 44. Cleaning brush; 45. Internal gear; 46. Worm gear; 47. Universal joint; 5. Heat exchange tube. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-6 This invention provides a technical solution for a high-efficiency furnace ash removal device and its application in thermal power boilers:

[0036] according to Figure 1 , Figure 2 and Figure 3 As shown, a high-efficiency furnace ash removal device includes a boiler body 1 and a material discharge mechanism 2 installed inside the boiler body 1. A heat exchange tube 5 is connected to the boiler body 1. The material discharge mechanism 2 includes a fork-scissor lift 27. The fork-scissor lift 27 is installed at the bottom of the boiler body 1. A push plate 24 is installed at the lifting end of the fork-scissor lift 27. A closing component is installed between the push plate 24 and the boiler body 1. The bottom of the boiler body 1 is provided with a material discharge port 26 for discharging furnace ash, so as to facilitate the discharge of furnace ash from the material discharge port 26.

[0037] The closing assembly includes a first rotating plate 21 and a second rotating plate 22. Both ends of the push plate 24 are rotatably connected to the first rotating plate 21. The inner wall of the boiler body 1 is rotatably connected to the second rotating plate 22 near the end of the first rotating plate 21. Both the first rotating plate 21 and the second rotating plate 22 are provided with fitting grooves 23. The first rotating plate 21 and the second rotating plate 22 respectively abut against the heat exchange tube 5 through the fitting grooves 23. The boiler body 1 is rotatably connected to a support rod 28 below the first rotating plate 21 and the second rotating plate 22. One end of the support rod 28 abuts against the bottom end of the second rotating plate 22, and the other end of the support rod 28 abuts against the bottom end of the push plate 24. A stop block 25 that abuts against the bottom end of the first rotating plate 21 is fixedly connected to the side wall of the boiler body 1.

[0038] The first rotating plate 21 and the second rotating plate 22 are made of heat-insulating material, and the push plate 24 is also made of heat-insulating material, thereby preventing the rubber wheel 33, scraper 32 and cleaning brush 44 from being damaged by high temperature for a long time.

[0039] The rotating end of the strut 28 is located below the first rotating plate 21, and the stop block 25 is elongated, with its bottom end used to abut against the first rotating plate 21.

[0040] according to Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, a scraping mechanism 3 is connected to the heat exchange tube 5. The scraping mechanism 3 includes a scraper 32. The scraper 32 is sleeved on the heat exchange tube 5. The scraper 32 abuts against the outer wall of the heat exchange tube 5. A connecting rod 31 is fixedly connected between the scraper 32 and the push plate 24.

[0041] The top of the scraper 32 has a frustum-shaped structure, and the connecting rod 31 has an "L"-shaped structure, which makes it easy to pull the scraper 32 upward and disperse the scraped furnace ash at the same time.

[0042] Multiple rotating shafts 34 are rotatably connected to the inner side of the bottom end of the scraper 32. Rubber wheels 33 are installed on the rotating shafts 34. Both ends of the rotating shafts 34 extend into the interior of the scraper 32. The rims of the rubber wheels 33 are used to roll and contact with the heat exchange tube 5, thereby ensuring that the scraper 32 is subjected to uniform force and avoiding uneven force due to the scraper 32 tilting, thus preventing damage to the outer wall of the heat exchange tube 5.

[0043] according to Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, a cleaning mechanism 4 is connected to the scraper 32. The cleaning mechanism 4 includes a rotating ring 41. The bottom end of the scraper 32 is connected to the rotating ring 41. The bottom end of the rotating ring 41 is provided with a fixed ring 43. A support plate 42 is fixedly connected between the fixed ring 43 and the rotating ring 41. An annular cleaning brush 44 is installed on the fixed ring 43. The bristles of the cleaning brush 44 abut against the outer wall of the heat exchange tube 5. A drive assembly for driving the rotating ring 41 to rotate is connected to the scraper 32, so as to facilitate further cleaning of the outer wall of the heat exchange tube 5 by the cleaning brush 44.

[0044] The support plate 42 is provided with three rings, and the axis of the fixing ring 43 coincides with the axis of the heat exchange tube 5, thereby ensuring that the cleaning brush 44 can make uniform contact with the outer wall of the heat exchange tube 5.

[0045] The drive assembly includes an internal gear 45. The scraper 32 is rotatably connected to the bottom end of the internal gear 45. A rotating ring 41 is fixedly connected to the bottom end of the internal gear 45 and is rotatably connected to the scraper 32. A worm gear 46 that meshes with the internal gear 45 is rotatably connected inside the scraper 32. The rotating shaft of the worm gear 46 is connected to the rotating shaft 34 through a universal joint 47, which facilitates the cleaning brush 44 to rotate while moving up and down, thereby increasing the cleaning effect.

[0046] During operation, the material burns inside the boiler body 1. Some ash, along with tar, adheres to the heat exchange tubes 5, affecting heat exchange. After the boiler body 1 stops and dissipates heat, the ash is pushed onto the first rotating plate 21 and the second rotating plate 22. The forklift scissor lift 27 is extended, causing the push plate 24 to move upward. The first rotating plate 21 follows the push plate 24 and rotates downward under gravity. Simultaneously, the push plate 24 disengages from the support rod 28, and the second rotating plate 22 loses its support. The second rotating plate 22 will then rotate downward under gravity, facilitating the discharge of ash from the boiler body 1 through the discharge port 26. At the same time, the connecting rod 31 drives the scraper 32 to move upward along the heat exchange tubes 5. The top of the scraper 32 is shaped like a frustum. This effectively removes the tar and ash adhering to the heat exchange tube 5. The rubber wheel 33 stabilizes the sliding of the scraper 32, preventing it from shifting and damaging the outer wall of the heat exchange tube 5. As the rubber wheel 33 rotates, it drives the rotating shaft 34 to rotate, which in turn changes the direction of rotation via the universal joint 47, causing the worm gear 46 to rotate. The worm gear 46 drives the internal gear 45 to rotate, causing the rotating ring 41 at the bottom of the internal gear 45 to rotate, which in turn drives the cleaning brush 44 on the fixed ring 43 to rotate. This achieves the simultaneous upward movement of the scraper 32 and the rotation of the cleaning brush 44, allowing for a thorough cleaning after the scraper 32 has removed the tar and ash adhering to the heat exchange tube 5, thus ensuring the heat exchange efficiency of the heat exchange tube 5.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency furnace ash removal device, comprising a boiler body (1) and a material unloading mechanism (2) installed inside the boiler body (1), wherein a heat exchange tube (5) is connected to the boiler body (1), characterized in that: The unloading mechanism (2) includes a fork-scissor lift (27). The fork-scissor lift (27) is installed at the bottom of the boiler body (1). A push plate (24) is installed at the lifting end of the fork-scissor lift (27). A closing assembly is installed between the push plate (24) and the boiler body (1). The bottom of the boiler body (1) is provided with an unloading port (26) for discharging ash. A scraping mechanism (3) is connected to the heat exchange tube (5). The scraping mechanism (3) includes a scraper (32). The scraper (32) is sleeved on the heat exchange tube (5). The scraper (32) abuts against the outer wall of the heat exchange tube (5). A connecting rod (31) is fixedly connected between the scraper (32) and the push plate (24). A cleaning mechanism (4) is connected to the scraper (32). The cleaning mechanism (4) includes a rotating ring (41), the bottom end of the scraper (32) is connected to the rotating ring (41), the bottom end of the rotating ring (41) is provided with a fixed ring (43), a support plate (42) is fixedly connected between the fixed ring (43) and the rotating ring (41), an annular cleaning brush (44) is installed on the fixed ring (43), the bristles of the cleaning brush (44) abut against the outer wall of the heat exchange tube (5), and a drive assembly for driving the rotating ring (41) to rotate is connected to the scraper (32).

2. The high-efficiency furnace ash removal device according to claim 1, characterized in that: The closing assembly includes a first rotating plate (21) and a second rotating plate (22). The first rotating plate (21) is rotatably connected to both ends of the push plate (24). The second rotating plate (22) is rotatably connected to one end of the inner wall of the boiler body (1) near the first rotating plate (21). The first rotating plate (21) and the second rotating plate (22) are provided with fitting grooves (23). The first rotating plate (21) and the second rotating plate (22) respectively abut against the heat exchange tube (5) through the fitting grooves (23). The boiler body (1) is rotatably connected to a support rod (28) below the first rotating plate (21) and the second rotating plate (22). One end of the support rod (28) abuts against the bottom end of the second rotating plate (22). The other end of the support rod (28) abuts against the bottom end of the push plate (24). A stop block (25) that abuts against the bottom end of the first rotating plate (21) is fixedly connected to the side wall of the boiler body (1).

3. The high-efficiency furnace ash removal device according to claim 2, characterized in that: The first rotating plate (21) and the second rotating plate (22) are heat-insulating materials, and the push plate (24) is a heat-insulating material.

4. The high-efficiency furnace ash cleaning device according to claim 2, characterized in that: The rotating end of the support rod (28) is located below the first rotating plate (21), and the stop block (25) is elongated. The bottom end of the stop block (25) is used to abut against the first rotating plate (21).

5. The high-efficiency furnace ash cleaning device according to claim 1, characterized in that: The top of the scraper (32) has an annular frustum structure, and the connecting rod (31) has an "L" shaped structure.

6. The high-efficiency furnace ash cleaning device according to claim 1, characterized in that: Multiple rotating shafts (34) are rotatably connected to the inner side of the bottom end of the scraper (32). Rubber wheels (33) are installed on the rotating shafts (34). Both ends of the rotating shafts (34) extend into the interior of the scraper (32). The rim of the rubber wheels (33) is used to roll against the heat exchange tube (5).

7. The high-efficiency furnace ash cleaning device according to claim 6, characterized in that: The support plate (42) is provided in three parts, and the axis of the fixing ring (43) coincides with the axis of the heat exchange tube (5).

8. The high-efficiency furnace ash cleaning device according to claim 7, characterized in that: The drive assembly includes an internal gear (45), the scraper (32) is rotatably connected to the bottom end of the internal gear (45), the rotating ring (41) is fixedly connected to the bottom end of the internal gear (45), the rotating ring (41) is rotatably connected to the scraper (32), the scraper (32) is rotatably connected to the inside of the scraper (32) and a worm (46) meshing with the internal gear (45), and the rotating shaft of the worm (46) is connected to the rotating shaft (34) through a universal joint (47).

9. A method for applying a high-efficiency furnace ash removal device in a thermal power boiler, comprising the high-efficiency furnace ash removal device as described in any one of claims 2-4, characterized in that: After the boiler body (1) stops and dissipates heat, the forklift elevator (27) is extended, which drives the push plate (24) to move upward. The first rotating plate (21) and the second rotating plate (22) lose their support and thus flip downward, allowing the furnace ash to be discharged. The push plate (24) drives the scraper (32) to move upward along the heat exchange tube (5) to scrape off the tar and furnace ash adhering to the heat exchange tube (5). The upward movement of the scraper (32) also drives the cleaning brush (44) to rotate. The cleaning brush (44) will further clean the heat exchange tube (5).

Images