Pneumatic ash conveying pipeline system and control method for thermal power plant

Abstract

This invention discloses a pneumatic ash conveying pipeline system and control method for thermal power plants, relating to the field of pneumatic ash conveying technology. It includes a horizontal plate, an air compressor, a silo pump, a first ash conveying pipe, and a second ash conveying pipe. An air storage tank and an air compressor are installed above the horizontal plate. A first support rod is located on the right side of the horizontal plate. An ash inlet hopper is installed above the silo pump, and a second support rod is located on the right side of the silo pump. The pneumatic ash conveying pipeline system and control method for thermal power plants includes a first ash conveying pipe and a second ash conveying pipe. A first control valve is closed. After the coal ash conveying in the first ash conveying pipe is completed, the first control valve and a fourth control valve are opened. The coal ash in the silo pump is then conveyed through the second ash conveying pipe, subsequently merging into the upper end of the first ash conveying pipe, and then conveyed to the ash collection silo through a feeding mechanism. The system circulates between the first and second ash conveying pipes, reducing wear pressure on both pipes without reducing the coal ash conveying efficiency.

Description

Technical Field

[0001] This invention relates to the field of pneumatic ash conveying technology, specifically to a pneumatic ash conveying pipeline system and control method for thermal power plants. Background Technology

[0002] A thermal power plant, or coal-fired power plant for short, is a factory that uses combustible materials (such as coal) as fuel to produce electricity. Its basic production process is as follows: when fuel is burned, it heats water to generate steam, converting the chemical energy of the fuel into heat energy. The steam pressure drives the turbine to rotate, converting the heat energy into mechanical energy. Then, the turbine drives the generator to rotate, converting the mechanical energy into electrical energy.

[0003] Pneumatic conveying devices are simple in structure and easy to operate. They can convey materials horizontally, vertically, or at an angle. During the conveying process, physical operations such as heating, cooling, drying, and air classification, or certain chemical operations, can be performed simultaneously. Compared with mechanical conveying, this method consumes more energy, particles are more easily damaged, and equipment is more susceptible to abrasion. Materials with high moisture content, adhesive properties, or those prone to generating static electricity at high speeds are not suitable for pneumatic conveying. Pneumatic conveying pipelines are commonly used in thermal power plants for transporting coal ash.

[0004] For example, an energy-saving pneumatic ash conveying pipeline system, disclosed in CN207275738U, can quickly and conveniently convey ash using pneumatics, reducing wear on the pipeline during the conveying process, and treating residual dust and materials inside, thus preventing resource waste. However, this device still has certain shortcomings.

[0005] In the process of conveying coal ash, single-pipeline conveying increases the conveying pressure of the pipeline and the wear rate of the pipeline inner wall. At the same time, in the early conveying process, some coal ash is adsorbed on the inner wall of the pipeline, which can easily cause pipeline blockage over time and reduce the efficiency of pneumatic ash conveying.

[0006] Therefore, we propose a pneumatic ash conveying pipeline system and control method for thermal power plants to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a pneumatic ash conveying pipeline system and control method for thermal power plants, in order to solve the problems mentioned in the background art. In the current pneumatic ash conveying pipeline system on the market, the single-pipe conveying structure increases the conveying pressure and wear rate of the pipeline inner wall. At the same time, in the early conveying structure, some coal ash is adsorbed on the inner wall of the pipeline, which can easily cause pipeline blockage over time and reduce the efficiency of pneumatic ash conveying.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a pneumatic ash conveying pipeline system and control method for a thermal power plant, comprising a horizontal plate, an air compressor, a silo pump, a first ash conveying pipe, and a second ash conveying pipe. An air storage tank and an air compressor are installed above the horizontal plate, with an inlet pipe and an outlet pipe respectively installed on the left and right sides of the air compressor. A first support rod is provided on the right side of the horizontal plate, and a silo pump is installed above the first support rod. A first discharge pipe is installed below the silo pump. An ash inlet hopper is installed above the silo pump. The first ash conveying pipe is connected to the right side of the first discharge pipe. A second ash conveying pipe is installed on the rear side. A second support rod is set on the right side of the silo pump, and an ash collection silo is installed above the second support rod. A support plate is installed on the left side of the ash collection silo. A fixed block is installed above the support plate, and a movable rack is connected inside the fixed block. An elastic block is installed on the left side of the movable rack. A fixed plate is installed on the rear side of the support plate, and a forward and reverse motor is installed on the rear side of the fixed plate. A gear is installed on the front side of the forward and reverse motor through the output shaft. The right sides of the first ash conveying pipe and the second ash conveying pipe are connected by a connecting plate, and fixed balls are installed at equal intervals on the right side of the connecting plate.

[0009] Preferably, the air storage tank is located on the left side of the air compressor, and the air inlet pipe on the left side of the air compressor is connected to the air storage tank, while the air outlet pipe on the right side of the air compressor is connected to the first discharge pipe.

[0010] With the above structural design, when the air compressor is started, air is drawn in through the air inlet pipe and discharged into the first discharge pipe through the air outlet pipe, thereby providing pneumatic power for the ash conveying operation.

[0011] Preferably, the ash inlet hopper is connected to the silo pump via a second discharge pipe, and a first control valve and a second control valve are respectively installed on the first discharge pipe and the second discharge pipe.

[0012] With the above structural design, when the second control valve and the first control valve are opened, the coal ash in the ash hopper can enter the silo pump through the second discharge pipe, and then be transported through the first discharge pipe below the silo pump.

[0013] Preferably, both ends of the second ash conveying pipe are connected to the first ash conveying pipe, and a third control valve and a fourth control valve are respectively installed on the first ash conveying pipe and the second ash conveying pipe. The third control valve, the fourth control valve and the first control valve are all digitally controlled timed valves.

[0014] With the above structural design, the first control valve is closed. After the coal ash is conveyed through the first ash conveying pipe, the first control valve and the fourth control valve are opened. The coal ash in the silo pump is then conveyed through the second ash conveying pipe, and then merged into the upper end of the first ash conveying pipe. It is then conveyed to the ash collection silo through the feeding mechanism. The material is circulated through the first and second ash conveying pipes, which reduces the wear pressure on the first and second ash conveying pipes, and does not reduce the conveying efficiency of coal ash.

[0015] Preferably, the ash collection silo is equipped with a feeding mechanism, and the end of the first ash conveying pipe is connected to the ash collection silo.

[0016] With the above structural design, the first ash conveying pipe transports the coal ash to the ash collection silo through the feeding mechanism, thereby completing the collection of coal ash.

[0017] Preferably, the fixed block has a sliding groove inside, and the sliding groove and the movable rack form a sliding connection structure.

[0018] The above structural design ensures that when the movable rack moves up and down under force, it moves along the groove in the fixed block, making the up and down movement of the movable rack more stable and preventing deviation.

[0019] Preferably, the elastic blocks are equidistantly distributed on the movable rack, and the elastic blocks are designed with an arc-shaped structure, so that the elastic blocks and the fixed ball can be interlocked.

[0020] With the above structural design, the up-and-down movement of the movable rack can drive the elastic block to move up and down, thereby causing the elastic block to scrape back and forth against the connecting plate and the fixed ball, causing the connecting plate to vibrate. Through the connecting plate, the first ash conveying pipe and the second ash conveying pipe vibrate, so that coal ash will not adhere to the inside of the first ash conveying pipe and the second ash conveying pipe during ash conveying, thereby preventing blockage inside the first ash conveying pipe and the second ash conveying pipe.

[0021] Preferably, the gear and the movable rack can mesh with each other, and the gear can rotate intermittently in the forward and reverse directions under the action of the forward and reverse motor.

[0022] With the above structural design, when the forward and reverse motors are started, the forward and reverse motors drive the gears to rotate forward and reverse through the output shaft, and then the gears drive the movable rack to move up and down.

[0023] A control method for a pneumatic ash conveying pipeline system in a thermal power plant, the control method specifically includes the following steps:

[0024] S1. Start the air compressor and the forward and reverse motors, open the first control valve, the second control valve and the third control valve. The coal ash in the ash hopper enters the silo pump through the second discharge pipe, and then through the first discharge pipe below the silo pump.

[0025] S2. The air compressor takes in air through the intake pipe and discharges air into the first discharge pipe through the outlet pipe. Then, it blows the coal ash in the first discharge pipe to the first ash conveying pipe. The coal ash is transported to the feeding mechanism through the first ash conveying pipe and enters the ash collection silo.

[0026] S3. Close the first control valve. After the coal ash is conveyed through the first ash conveying pipe, open the first control valve and the fourth control valve. The coal ash in the silo pump is conveyed through the second ash conveying pipe, then merged into the upper end of the first ash conveying pipe, and then conveyed to the ash collection silo through the feeding mechanism. The coal ash is then circulated through the first ash conveying pipe and the second ash conveying pipe.

[0027] S4. While conveying ash, the forward and reverse motors drive the gears to rotate forward and reverse through the output shaft. Then, the gears drive the movable rack to move up and down, and the movable rack drives the elastic block on the left side to move up and down. This causes the elastic block to scrape back and forth against the connecting plate and the fixed ball, causing the connecting plate to vibrate. The connecting plate then drives the first and second ash conveying pipes to vibrate.

[0028] Compared with the prior art, the beneficial effects of the present invention are: the pneumatic ash conveying pipeline system and control method for thermal power plants:

[0029] 1. The system is equipped with a first ash conveying pipe and a second ash conveying pipe. After the first control valve is closed and the coal ash conveying in the first ash conveying pipe is completed, the first control valve and the fourth control valve are opened. The coal ash in the silo pump is then conveyed through the second ash conveying pipe and then merged into the upper end of the first ash conveying pipe. It is then conveyed to the ash collection silo through the feeding mechanism. The system circulates through the first and second ash conveying pipes to reduce the wear pressure on the first and second ash conveying pipes without reducing the conveying efficiency of the coal ash.

[0030] 2. Equipped with a movable rack, elastic block, gear, and fixed ball, the forward and reverse motor is started. The motor drives the gear to rotate forward and reverse through the output shaft. Then, the gear drives the movable rack to move up and down, which in turn drives the elastic block to move up and down. This causes the elastic block to scrape back and forth against the connecting plate and the fixed ball, causing the connecting plate to vibrate. The connecting plate then drives the first and second ash conveying pipes to vibrate, preventing coal ash from adhering to their interiors during ash conveying, thus preventing blockage inside the first and second ash conveying pipes. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0033] Figure 3 This is a schematic diagram of the position structure of the elastic block and the fixed ball in this invention;

[0034] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point B;

[0035] Figure 5This is a top view schematic diagram of the connection structure between the first ash conveying pipe and the second ash conveying pipe of the present invention;

[0036] Figure 6 This is a schematic diagram of the main structure of the second ash conveying pipe of the present invention;

[0037] Figure 7 This is a schematic diagram of the connection structure between the fixing plate and the forward and reverse motors of the present invention.

[0038] In the diagram: 1. Horizontal plate; 2. Air tank; 3. Air compressor; 4. Inlet pipe; 5. Outlet pipe; 6. First support rod; 7. Silo pump; 8. First discharge pipe; 9. First control valve; 10. Ash hopper; 11. Second discharge pipe; 12. Second control valve; 13. First ash conveying pipe; 14. Second ash conveying pipe; 15. Third control valve; 16. Fourth control valve; 17. Second support rod; 18. Ash collection silo; 19. Feeding mechanism; 20. Support plate; 21. Fixed block; 22. Slide groove; 23. Movable rack; 24. Elastic block; 25. Fixed plate; 26. Forward and reverse motor; 27. Gear; 28. Connecting plate; 29. ​​Fixed ball. Detailed Implementation

[0039] 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.

[0040] Please see Figure 1-7This invention provides a technical solution: a pneumatic ash conveying pipeline system and control method for a thermal power plant, comprising a horizontal plate 1, an air storage tank 2, an air compressor 3, an air inlet pipe 4, an air outlet pipe 5, a first support rod 6, a silo pump 7, a first discharge pipe 8, a first control valve 9, an ash inlet hopper 10, a second discharge pipe 11, a second control valve 12, a first ash conveying pipe 13, a second ash conveying pipe 14, a third control valve 15, a fourth control valve 16, a second support rod 17, an ash collection silo 18, a feeding mechanism 19, a support plate 20, a fixed block 21, a slide 22, a movable rack 23, an elastic block 24, a fixed plate 25, a forward and reverse motor 26, a gear 27, a connecting plate 28, and a fixed ball 29. The air storage tank 2 and the air compressor 3 are installed above the horizontal plate 1. The air storage tank 2 is located to the left of the air compressor 3, and the air inlet pipe 4 on the left side of the air compressor 3 is connected to the air storage tank 2. The air outlet pipe 4 on the right side of the air compressor 3... Air pipe 5 is connected to the first discharge pipe 8. When the air compressor 3 is started, air is introduced into the air compressor 3 through the air inlet pipe 4 and discharged into the first discharge pipe 8 through the air outlet pipe 5, thereby providing air power for the ash conveying operation. The air compressor 3 is equipped with air inlet pipe 4 and air outlet pipe 5 on its left and right sides, respectively. A first support rod 6 is set on the right side of the horizontal plate 1, and a silo pump 7 is installed above the first support rod 6. The first discharge pipe 8 is installed below the silo pump 7, and an ash hopper 10 is installed above the silo pump 7. The ash hopper 10 and the silo pump 7 are connected by a second discharge pipe 11. A first control valve 9 and a second control valve 12 are installed on the first discharge pipe 8 and the second discharge pipe 11, respectively. When the second control valve 12 and the first control valve 9 are opened, the coal ash in the ash hopper 10 can enter the silo pump 7 through the second discharge pipe 11, and then be conveyed through the first discharge pipe 8 below the silo pump 7.

[0041] The right side of the first discharge pipe 8 is connected to the first ash conveying pipe 13, and the rear side of the first ash conveying pipe 13 is equipped with the second ash conveying pipe 14. Both the upper and lower ends of the second ash conveying pipe 14 are connected to the first ash conveying pipe 13. The first ash conveying pipe 13 and the second ash conveying pipe 14 are respectively equipped with a third control valve 15 and a fourth control valve 16. The third control valve 15, the fourth control valve 16 and the first control valve 14 are all digitally controlled timed valves. When the first control valve 9 is closed and the coal ash conveying in the first ash conveying pipe 13 is completed, the first control valve 9 and the fourth control valve 16 are opened. The coal ash in the silo pump 7 is conveyed through the second ash conveying pipe 14, and then merged into the upper end of the first ash conveying pipe 13. Then it is conveyed to the ash collection silo 18 through the feeding mechanism 19. The first ash conveying pipe 13 and the second ash conveying pipe 14 are used for cyclic conveying. The first ash conveying pipe 13 and the second ash conveying pipe 14 are lowered. 4. Wear pressure, without reducing the conveying efficiency of coal ash. A second support rod 17 is set on the right side of the silo pump 7, and an ash collection silo 18 is installed above the second support rod 17. A feeding mechanism 19 is installed on the ash collection silo 18, and the end of the first ash conveying pipe 13 is connected to the ash collection silo 18. The first ash conveying pipe 13 conveys coal ash into the ash collection silo 18 through the feeding mechanism 19, thereby completing the collection of coal ash. A support plate 20 is installed on the left side of the ash collection silo 18, and a fixed block 21 is installed above the support plate 20. A sliding groove 22 is opened inside the fixed block 21, and a sliding connection structure is formed between the sliding groove 22 and the movable rack 23. When the movable rack 23 moves up and down under force, the movable rack 23 moves up and down along the sliding groove 22 in the fixed block 21, thereby making the up and down movement of the movable rack 23 more stable and preventing deviation.

[0042] The fixed block 21 is internally connected to a movable rack 23, and an elastic block 24 is installed on the left side of the movable rack 23. The elastic blocks 24 are evenly distributed on the movable rack 23 and have an arc-shaped structure design. The elastic blocks 24 and the fixed ball 29 can be interlocked. The up and down movement of the movable rack 23 can drive the elastic blocks 24 to move up and down, so that the elastic blocks 24 scrape back and forth against the connecting plate 28 and the fixed ball 29, causing the connecting plate 28 to vibrate. Through the connecting plate 28, the first ash conveying pipe 13 and the second ash conveying pipe 14 vibrate, so that coal ash will not adhere to the inside of the first ash conveying pipe 13 and the second ash conveying pipe 14 during ash conveying, thereby preventing the first ash conveying pipe 13 from being used for ash conveying. The pipe 13 and the second ash conveying pipe 14 are blocked. A fixing plate 25 is installed on the rear side of the support plate 20, and a forward and reverse motor 26 is installed on the rear side of the fixing plate 25. A gear 27 is installed on the front side of the forward and reverse motor 26 through the output shaft. The gear 27 can mesh with the movable rack 23. The gear 27 can rotate forward and reverse intermittently under the action of the forward and reverse motor 26. When the forward and reverse motor 26 is started, the forward and reverse motor 26 drives the gear 27 to rotate forward and reverse through the output shaft. Then the gear 27 drives the movable rack 23 to move up and down. The right sides of the first ash conveying pipe 13 and the second ash conveying pipe 14 are connected by a connecting plate 28, and a fixing ball 29 is installed at equal intervals on the right side of the connecting plate 28.

[0043] A control method for a pneumatic ash conveying pipeline system in a thermal power plant, the control method specifically includes the following steps:

[0044] S1. Start the air compressor 3 and the forward and reverse motor 26, open the first control valve 9, the second control valve 12 and the third control valve 15, and the coal ash in the ash hopper 10 enters the silo pump 7 through the second discharge pipe 11, and then through the first discharge pipe 8 below the silo pump 7.

[0045] S2. The air compressor 3 takes in air through the air inlet pipe 4 and discharges air into the first discharge pipe 8 through the air outlet pipe 5. Then, it blows the coal ash in the first discharge pipe 8 to the first ash conveying pipe 13. The coal ash is conveyed to the feeding mechanism 19 through the first ash conveying pipe 13 and enters the ash collection silo 18.

[0046] S3. Close the first control valve 9. After the coal ash is conveyed through the first ash conveying pipe 13, open the first control valve 9 and the fourth control valve 16. The coal ash in the silo pump 7 is conveyed through the second ash conveying pipe 14, and then merged into the upper end of the first ash conveying pipe 13. Then it is conveyed to the ash collection silo 18 through the feeding mechanism 19 and circulated through the first ash conveying pipe 13 and the second ash conveying pipe 14.

[0047] S4. While conveying ash, the forward and reverse motor 26 drives the gear 27 to rotate forward and reverse through the output shaft. Then, the gear 27 drives the movable rack 23 to move up and down. The movable rack 23 drives the elastic block 24 on the left to move up and down, so that the elastic block 24 scrapes back and forth against the connecting plate 28 and the fixed ball 29, causing the connecting plate 28 to vibrate. Through the connecting plate 28, the first ash conveying pipe 13 and the second ash conveying pipe 14 vibrate.

[0048] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pneumatic ash conveying pipeline system for a thermal power plant, comprising a horizontal plate (1), an air compressor (3), a silo pump (7), a first ash conveying pipe (13), and a second ash conveying pipe (14), characterized in that: An air storage tank (2) and an air compressor (3) are installed above the horizontal plate (1). An air inlet pipe (4) and an air outlet pipe (5) are installed on the left and right sides of the air compressor (3), respectively. A first support rod (6) is provided on the right side of the horizontal plate (1). A silo pump (7) is installed above the first support rod (6). A first discharge pipe (8) is installed below the silo pump (7). An ash hopper (10) is installed above the silo pump (7). A first ash conveying pipe (13) is connected to the right side of the first discharge pipe (8). A second ash conveying pipe (14) is installed on the rear side of the first ash conveying pipe (13). A second support rod (17) is provided on the right side of the silo pump (7). An air inlet pipe (4) and an air outlet pipe (5) are installed above the second support rod (17). The ash collection silo (18) is equipped with a support plate (20) on the left side of the ash collection silo (18). A fixing block (21) is installed above the support plate (20), and a movable rack (23) is connected inside the fixing block (21). An elastic block (24) is installed on the left side of the movable rack (23). A fixing plate (25) is installed on the rear side of the support plate (20), and a forward and reverse motor (26) is installed on the rear side of the fixing plate (25). A gear (27) is installed on the front side of the forward and reverse motor (26) through the output shaft. The right sides of the first ash conveying pipe (13) and the second ash conveying pipe (14) are connected by a connecting plate (28), and a fixing ball (29) is installed at equal intervals on the right side of the connecting plate (28).

2. The pneumatic ash conveying pipeline system for thermal power plants according to claim 1, characterized in that: The air storage tank (2) is located on the left side of the air compressor (3), and the air inlet pipe (4) on the left side of the air compressor (3) is connected to the air storage tank (2), and the air outlet pipe (5) on the right side of the air compressor (3) is connected to the first discharge pipe (8).

3. The pneumatic ash conveying pipeline system for thermal power plants according to claim 1, characterized in that: The ash hopper (10) is connected to the silo pump (7) through a second discharge pipe (11), and a first control valve (9) and a second control valve (12) are respectively installed on the first discharge pipe (8) and the second discharge pipe (11).

4. The pneumatic ash conveying pipeline system for thermal power plants according to claim 1, characterized in that: The upper and lower ends of the second ash conveying pipe (14) are connected to the first ash conveying pipe (13), and the first ash conveying pipe (13) and the second ash conveying pipe (14) are respectively equipped with a third control valve (15) and a fourth control valve (16). The third control valve (15), the fourth control valve (16) and the first control valve (9) are all digitally controlled timed valves.

5. The pneumatic ash conveying pipeline system for thermal power plants according to claim 1, characterized in that: The ash collection silo (18) is equipped with a feeding mechanism (19), and the end of the first ash conveying pipe (13) is connected to the ash collection silo (18).

6. The pneumatic ash conveying pipeline system for thermal power plants according to claim 1, characterized in that: The fixed block (21) has a sliding groove (22) inside, and the sliding groove (22) and the movable rack (23) form a sliding connection structure.

7. The pneumatic ash conveying pipeline system for thermal power plants according to claim 1, characterized in that: The elastic blocks (24) are evenly distributed on the movable rack (23), and the elastic blocks (24) are designed with an arc shape. The elastic blocks (24) and the fixed ball (29) can be engaged with each other.

8. A pneumatic ash conveying pipeline system for a thermal power plant according to claim 1, characterized in that: The gear (27) and the movable rack (23) can mesh with each other, and the gear (27) can rotate intermittently in the forward and reverse directions under the action of the forward and reverse motor (26).

9. A control method for a pneumatic ash conveying pipeline system in a thermal power plant according to any one of claims 1-8, characterized in that: The control method specifically includes the following steps: S1. Start the air compressor (3) and the forward and reverse motor (26), open the first control valve (9), the second control valve (12) and the third control valve (15), and the coal ash in the ash hopper (10) enters the silo pump (7) through the second discharge pipe (11), and then through the first discharge pipe (8) below the silo pump (7); S2. The air compressor (3) takes in air through the air inlet pipe (4) and discharges air into the first discharge pipe (8) through the air outlet pipe (5). Then, the coal ash in the first discharge pipe (8) is blown to the first ash conveying pipe (13). The coal ash is conveyed to the feeding mechanism (19) through the first ash conveying pipe (13) and enters the ash collection silo (18). S3. Close the first control valve (9). After the coal ash is conveyed through the first ash conveying pipe (13), open the first control valve (9) and the fourth control valve (16). The coal ash in the silo pump (7) is conveyed through the second ash conveying pipe (14), and then merged into the upper end of the first ash conveying pipe (13). It is then conveyed to the ash collection silo (18) through the feeding mechanism (19) and circulated through the first ash conveying pipe (13) and the second ash conveying pipe (14). S4. While conveying ash, the forward and reverse motor (26) drives the gear (27) to rotate forward and reverse through the output shaft. Then the gear (27) drives the movable rack (23) to move up and down. The movable rack (23) drives the elastic block (24) on the left side to move up and down, so that the elastic block (24) scrapes back and forth against the connecting plate (28) and the fixed ball (29), causing the connecting plate (28) to vibrate. Through the connecting plate (28), the first ash conveying pipe (13) and the second ash conveying pipe (14) vibrate.

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