Automatic ash discharging device for coal-fired furnace of power plant

Abstract

This invention discloses an automatic ash removal device for a coal-fired power plant furnace, relating to the field of coal-fired power plant ash removal technology. The automatic ash removal device includes an ash hopper with a discharge port fixedly connected to its bottom surface. An installation groove is formed on the side wall of the ash hopper, and an emergency discharge port is formed inside the installation groove. A discharge assembly is installed inside the ash hopper, including a support plate. Both ends of the support plate are fixedly connected to the inner wall of the ash hopper. A through hole is formed on the surface of the support plate, and a rotating shaft is rotatably connected to the through hole. A support column is fixedly connected to the outer wall of the rotating shaft. This automatic ash removal device for a coal-fired power plant furnace uses a scraper that rotates and contacts a protrusion, causing a sealing plate to move and opening the emergency discharge port for ash removal. The ash is collected in a collection hopper and transported to the outside of the ash hopper via an ash removal pipe, improving discharge efficiency and reducing dust pollution.

Description

Technical Field

[0001] This invention relates to the field of coal-fired furnace ash removal technology, specifically to an automatic ash removal device for a coal-fired furnace in a power plant. Background Technology

[0002] The ash conveying system is a crucial component of coal-fired power plants, primarily responsible for transporting the dust separated from the dust collector to the ash silo. However, during operation, ash conveying bottlenecks sometimes occur, leading to elevated ash hopper levels. This problem not only severely impacts the dust collector's efficiency but can also cause the ash hopper to collapse, resulting in serious safety accidents.

[0003] To address this issue, coal-fired power plants can only perform emergency ash removal from the ash hopper. The main solution involves discharging dust from the ash hopper through a discharge pipe into an external ash truck, which then transports the ash, thus lowering the ash level in the ash hopper. However, this ash removal process often suffers from low efficiency and significant dust pollution. Therefore, this application proposes an automatic ash removal device for coal-fired boilers in power plants. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an automatic ash removal device for coal-fired power plant furnaces, which solves the problems of low efficiency and high dust pollution that often occur in the emergency ash removal process of coal-fired power plants in the aforementioned background technologies.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic ash removal device for a coal-fired power plant furnace, comprising an ash hopper, a cover fixedly connected to the surface of the ash hopper, an ash inlet on the surface of the cover, a discharge port fixedly connected to the bottom surface of the ash hopper, an installation groove on the side wall of the ash hopper, an emergency discharge port inside the installation groove, a discharge assembly inside the ash hopper, the discharge assembly comprising a support plate, both ends of the support plate fixedly connected to the inner wall of the ash hopper, a through hole on the surface of the support plate, a rotating shaft rotatably connected in the through hole, a bevel gear fixedly connected to the top end of the rotating shaft, a protective cover fixedly connected to the surface of the support plate, a support column fixedly connected to the outer wall of the rotating shaft, an installation plate fixedly connected to the end of the support column, a telescopic rod fixedly connected to the side wall of the installation plate, and a scraper fixedly connected to the end of the telescopic rod.

[0008] Preferably, a motor is fixedly connected to the side wall of the cover, the output shaft of the motor passes through and is rotatably connected to the inner wall of the cover, the output end of the motor is fixedly connected to a connecting shaft, the connecting shaft passes through and is rotatably connected to the inside of the protective cover, and a second bevel gear is fixedly connected to the end of the connecting shaft, the second bevel gear meshing with the first bevel gear.

[0009] Preferably, the mounting slot is provided with an automatic opening and closing component, which includes an arc-shaped rod. Both ends of the arc-shaped rod are fixedly connected to the inside of the mounting slot. A sealing plate is slidably connected inside the mounting slot, and the arc-shaped rod passes through and is slidably connected to the side wall of the sealing plate.

[0010] Preferably, a support spring is fixedly connected between the sealing plate and the inner wall of the mounting groove, the support spring is sleeved on the outer wall of the arc-shaped rod, and a protrusion is fixedly connected to the side wall of the sealing plate.

[0011] Preferably, the scraper and the mounting plate are elastically connected by a return spring, which is sleeved on the outer wall of the telescopic rod.

[0012] Preferably, the sidewall of the scraper is arc-shaped, and the surface of the scraper is inclined.

[0013] Preferably, multiple arrayed triangular plates are fixedly connected to the outer wall of the rotating shaft, and multiple through slots are formed on the surface of the triangular plates.

[0014] Preferably, a collecting hopper is fixedly connected to the outer wall of the ash hopper, the collecting hopper is positioned corresponding to the emergency discharge port, and a discharge pipe is fixedly connected to the bottom of the collecting hopper.

[0015] Preferably, a rim is fixedly connected to the surface of the ash hopper, and four sets of symmetrically arranged support legs are fixedly connected to the bottom surface of the rim.

[0016] Preferably, a connecting seat is fixedly connected to the outer wall of the support leg, and the connecting seat is fixedly connected to the outer wall of the ash hopper.

[0017] (III) Beneficial Effects

[0018] This invention provides an automatic ash removal device for coal-fired boilers in power plants. It has the following beneficial effects:

[0019] (1) The automatic ash removal device of the coal-fired furnace in the power plant is driven by a motor to rotate the connecting shaft. The second bevel gear meshes with the first bevel gear for transmission. The rotating shaft drives the scraper to rotate and contact the protrusion, and drives the protrusion and the sealing plate to move, thereby compressing the support spring and opening the emergency discharge port. Under the action of centrifugal force, the furnace ash is discharged from the emergency discharge port. The furnace ash discharged from the emergency discharge port is collected by the collection hopper and transported to the outside of the ash hopper through the ash discharge pipe. It works in conjunction with the discharge port to discharge ash from the top and bottom, thereby improving the discharge efficiency and reducing dust pollution.

[0020] (2) The automatic ash removal device of the coal-fired furnace in the power plant drives the triangular plate to rotate through the rotating shaft, pushing the furnace ash in the area that the scraper cannot clean to the periphery, thereby increasing the cleaning range of the scraper. Multiple sets of through slots can help to distribute the furnace ash more evenly to the surrounding area.

[0021] (3) When the protrusion of the automatic ash removal device of the coal-fired furnace in the power plant comes into contact with the inner wall of the emergency discharge port, the scraper will cause the telescopic rod to retract under the action of the reaction force, and the reset spring will be compressed, so that the scraper passes through the protrusion. After the protrusion loses the power of the scraper, the support spring rebounds against the sealing plate, thereby closing the emergency discharge port and preventing dust from overflowing.

[0022] (4) The automatic ash removal device of the coal-fired furnace in the power plant provides elastic support for the scraper through the reset spring, so that the scraper fits tightly with the inner wall of the ash hopper. The side wall of the scraper is arc-shaped and better adapts to the shape of the inside of the ash hopper, thereby avoiding gaps between the scraper and the inside of the ash hopper. The inclined scraper surface can push the furnace ash to the edge of the ash hopper from the inside to the outside during rotation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram showing the overall structure of the present invention disassembled.

[0025] Figure 3 This is a schematic diagram of the ash removal component of the present invention;

[0026] Figure 4 This is a schematic diagram of the sealing component of the present invention;

[0027] Figure 5 This is an enlarged schematic diagram of section A of the structure of the present invention.

[0028] In the diagram: 1. Ash hopper; 11. Hopper rim; 12. Support leg; 13. Connecting seat; 14. Discharge port; 2. Cover; 21. Ash inlet; 3. Discharge assembly; 31. Support plate; 301. Protective cover; 32. Rotating shaft; 33. Bevel gear one; 34. Support column; 35. Mounting plate; 36. Telescopic rod; 37. Scraper; 38. Return spring; 39. Triangular plate; 310. Through groove; 311. Motor; 312. Connecting shaft; 313. Bevel gear two; 4. Mounting groove; 5. Emergency discharge port; 6. Collection hopper; 7. Ash discharge pipe; 8. Automatic opening and closing assembly; 81. Arc rod; 82. Sealing plate; 83. Support spring; 84. Protrusion. Detailed Implementation

[0029] 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.

[0030] Please see Figures 1-5 This invention provides an automatic ash discharge device for a coal-fired power plant furnace, comprising an ash hopper 1. A hopper rim 11 is fixedly connected to the surface of the ash hopper 1, and four symmetrically arranged support legs 12 are fixedly connected to the bottom surface of the hopper rim 11. The hopper rim 11 increases the area of ​​the top of the ash hopper 1, thereby facilitating the fixing of the four support legs 12. The four support legs 12 support the hopper rim 11, creating a certain distance between the bottom of the ash hopper 1 and the bottom surface, providing space for material discharge. A connecting seat 13 is fixedly connected to the outer wall of the support legs 12. The connecting seat 13 connects the support legs 12 to the outer wall of the ash hopper 1, thereby improving the supporting effect of the support legs 12 on the ash hopper 1. A cover 2 is fixedly connected to the surface of the ash hopper 1. An ash inlet 21 is provided on the surface of the cover 2. The cover 2 is fixed to the top of the ash hopper 1 by bolts. By setting the cover 2 and the ash inlet 21, the area of ​​the opening at the top of the ash hopper 1 is reduced, thus preventing the ash from floating out after it enters through the ash inlet 21. A discharge port 14 is fixedly connected to the bottom surface of the ash hopper 1. A valve is provided on the outer wall of the discharge port 14 for opening and closing the discharge port 14, thereby facilitating the discharge of materials.

[0031] Please see Figures 1-5The ash hopper 1 is equipped with a discharge assembly 3, which is used to discharge excess ash that exceeds the material level of the ash hopper 1. The discharge assembly 3 includes a support plate 31, both ends of which are fixedly connected to the inner wall of the ash hopper 1. A through hole is opened on the surface of the support plate 31, and a rotating shaft 32 is rotatably connected in the through hole. The support plate 31 is used to support and position the rotating shaft 32. A bevel gear 33 is fixedly connected to the top of the rotating shaft 32. The bevel gear 33 and the bevel gear 313 cooperate with each other to drive the rotating shaft 32 to rotate. A protective cover 301 is fixedly connected to the surface of the support plate 31. The protective cover 301 is used to cover the bevel gear 33 and the bevel gear 313, thereby preventing the transmission between the bevel gear 33 and the bevel gear 313 from being affected. A support column 34 is fixedly connected to the outer wall of the rotating shaft 32. A mounting plate 35 is fixedly connected to the end of the support column 34. The support column 34 is used to fix the mounting plate 35 to the outer wall of the rotating shaft 32, so that the rotating shaft 32 can drive the mounting plate 35 to rotate synchronously during rotation. A telescopic rod 36 is fixedly connected to the side wall of the mounting plate 35. A scraper 37 is fixedly connected to the end of the telescopic rod 36. The scraper 37 and the mounting plate 35 are elastically connected by a return spring 38. The return spring 38 is sleeved on the outer wall of the telescopic rod 36. The telescopic rod 36 is used to... The scraper 37 is fixed to the mounting plate 35, and the telescopic rod 36 can extend and retract. A return spring 38 provides elastic support to the scraper 37, ensuring a tight fit between the scraper 37 and the inner wall of the ash hopper 1. The sidewalls of the scraper 37 are arc-shaped, and its surface is inclined. The arc-shaped sidewalls of the scraper 37 better adapt to the shape of the ash hopper 1, thus avoiding gaps between the scraper 37 and the ash hopper 1. During rotation, the inclined surface of the scraper 37 pushes the ash from the inside out towards the edge of the ash hopper 1. Multiple arrays of triangular plates 39 are fixedly connected to the outer wall of the rotating shaft 32. Multiple through grooves 310 are formed on the surface of the triangular plates 39. The rotating shaft 32 drives the triangular plates 39 to rotate, pushing the ash in areas inaccessible to the scraper 37 to the periphery, thereby increasing the cleaning range of the scraper 37. The multiple through grooves 310 help to distribute the ash more evenly to the surrounding area.

[0032] Please see Figures 1-5 A motor 311 is fixedly connected to the side wall of the cover 2. The output shaft of the motor 311 passes through and is rotatably connected to the inner wall of the cover 2. A connecting shaft 312 is fixedly connected to the output end of the motor 311. The connecting shaft 312 is driven to rotate by the motor 311. The connecting shaft 312 passes through and is rotatably connected to the inside of the protective cover 301. A bevel gear 313 is fixedly connected to the end of the connecting shaft 312. The bevel gear 313 meshes with the bevel gear 33. The connecting shaft 312 is used to drive the bevel gear 313 to rotate, thereby driving the bevel gear 33 to rotate, and causing the rotating shaft 32 to rotate.

[0033] Please see Figures 1-5 The ash hopper 1 has an installation groove 4 on its side wall, and an emergency discharge port 5 is provided inside the installation groove 4. The installation groove 4 is used to install the automatic opening and closing component 8. During the rotation of the scraper 37, excess furnace ash is scraped off, and the furnace ash is rotated. Under the action of centrifugal force, the furnace ash is discharged from the emergency discharge port 5. A collection hopper 6 is fixedly connected to the outer wall of the ash hopper 1. The collection hopper 6 is positioned corresponding to the emergency discharge port 5. An ash discharge pipe 7 is fixedly connected to the bottom of the collection hopper 6. The collection hopper 6 is used to collect the furnace ash discharged from the emergency discharge port 5 and transport it to the outside of the ash hopper 1 through the ash discharge pipe 7.

[0034] Please see Figures 1-5 An automatic opening and closing assembly 8 is installed inside the mounting groove 4. This assembly is used to block the emergency discharge port 5. The automatic opening and closing assembly 8 includes an arc-shaped rod 81, both ends of which are fixedly connected to the inside of the mounting groove 4. A sealing plate 82 is slidably connected inside the mounting groove 4. The sealing plate 82 is used to block the emergency discharge port 5 and the gap between the mounting groove 4 and the collection hopper 6. The arc-shaped rod 81 passes through and is slidably connected to the side wall of the sealing plate 82. The arc-shaped rod 81 positions the sealing plate 82, preventing it from falling out of the mounting groove 4 and making the sealing plate 82 more stable during movement. A support spring 83 is fixedly connected between the sealing plate 82 and the inner wall of the mounting groove 4. The support spring 83 is sleeved on the outer wall of the arc-shaped rod 81. The support spring 83 provides elastic support to the sealing plate 82, so that the end of the sealing plate 82 fits tightly against the inside of the mounting groove 4, thereby sealing the emergency discharge port 5. A protrusion 84 is fixedly connected to the side wall of the sealing plate 82. The protrusion 84 is located inside the emergency discharge port 5, and the end of the protrusion 84 is arc-shaped and partially extends beyond the range of the emergency discharge port 5, thereby preventing the scraper from... During the rotation of scraper 37, it contacts the protrusion 84 and drives the protrusion 84 and the sealing plate 82 to move, thereby compressing the support spring 83 and opening the emergency discharge port 5 to discharge ash. When the protrusion 84 contacts the inner wall of the emergency discharge port 5, the scraper 37, under the action of the reaction force, causes the telescopic rod 36 to retract and the return spring 38 to compress, so that the scraper 37 passes through the protrusion 84. After the protrusion 84 loses the power of the scraper 37, the support spring 83 rebounds against the sealing plate 82, thereby closing the emergency discharge port 5.

[0035] In this invention, during use, the motor 311 drives the connecting shaft 312 to rotate, which in turn drives the second bevel gear 313 to rotate, thereby driving the first bevel gear 33 to rotate. This causes the rotating shaft 32 to drive the support column 34 and the mounting plate 35 to rotate synchronously. The protective cover 301 encloses the first bevel gear 33 and the second bevel gear 313, thus preventing the transmission between the first bevel gear 33 and the second bevel gear 313 from being affected. The return spring 38 provides elastic support for the scraper 37, ensuring that the scraper 37 and the ash hopper 1 are in contact. The inner walls are tightly fitted together, and the arc-shaped scraper 37 on the side wall better adapts to the shape of the inside of the ash hopper 1, thus avoiding gaps between the scraper 37 and the inside of the ash hopper 1. The inclined surface of the scraper 37 can push the furnace ash from the inside to the edge of the inside of the ash hopper 1 during rotation. The rotating shaft 32 drives the triangular plate 39 to rotate, pushing the furnace ash in the area that the scraper 37 cannot clean to the periphery, thereby increasing the cleaning range of the scraper 37. Multiple sets of through grooves 310 can help to distribute the furnace ash more evenly to the surrounding area.

[0036] During rotation, scraper 37 contacts protrusion 84, causing protrusion 84 and sealing plate 82 to move. This compresses support spring 83, opening emergency discharge port 5. Ash is discharged from emergency discharge port 5 under centrifugal force and collected by collection hopper 6, then transported to the outside of ash hopper 1 via ash discharge pipe 7. When protrusion 84 contacts the inner wall of emergency discharge port 5, scraper 37, under reaction force, causes telescopic rod 36 to retract, compressing return spring 38. This allows scraper 37 to pass through protrusion 84. After protrusion 84 loses the power of scraper 37, support spring 83 rebounds against sealing plate 82, closing emergency discharge port 5.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic ash discharge device for a coal-fired boiler in a power plant, comprising an ash hopper (1), a cover (2) fixedly connected to the surface of the ash hopper (1), an ash inlet (21) provided on the surface of the cover (2), and a discharge port (14) fixedly connected to the bottom surface of the ash hopper (1), characterized in that: The ash hopper (1) has an installation groove (4) on its side wall. An emergency discharge port (5) is provided inside the installation groove (4). A discharge assembly (3) is provided inside the ash hopper (1). The discharge assembly (3) includes a support plate (31). Both ends of the support plate (31) are fixedly connected to the inner wall of the ash hopper (1). A through hole is provided on the surface of the support plate (31). A rotating shaft (32) is rotatably connected in the through hole. A bevel gear (33) is fixedly connected to the top of the rotating shaft (32). A protective cover (301) is fixedly connected to the surface of the support plate (31). A support column (34) is fixedly connected to the outer wall of the rotating shaft (32). An installation plate (35) is fixedly connected to the end of the support column (34). A telescopic rod (36) is fixedly connected to the side wall of the installation plate (35). A scraper (37) is fixedly connected to the end of the telescopic rod (36). A motor (311) is fixedly connected to the side wall of the cover (2). The output shaft of the motor (311) passes through and is rotatably connected to the inner wall of the cover (2). A connecting shaft (312) is fixedly connected to the output end of the motor (311). The connecting shaft (312) passes through and is rotatably connected to the inside of the protective cover (301). A bevel gear two (313) is fixedly connected to the end of the connecting shaft (312). The bevel gear two (313) meshes with bevel gear one (33). An automatic opening and closing assembly (8) is provided inside the mounting slot (4). The automatic opening and closing assembly (8) includes an arc rod (81). Both ends of the arc rod (81) are fixedly connected to the inside of the mounting slot (4). A sealing plate (82) is slidably connected inside the mounting slot (4). The arc rod (81) passes through and is slidably connected to the side wall of the sealing plate (82). A support spring (83) is fixedly connected between the sealing plate (82) and the inner wall of the mounting groove (4). The support spring (83) is sleeved on the outer wall of the arc rod (81). A protrusion (84) is fixedly connected to the side wall of the sealing plate (82). The scraper (37) and the mounting plate (35) are elastically connected by a return spring (38), which is sleeved on the outer wall of the telescopic rod (36). The sidewall of the scraper (37) is arc-shaped, and the surface of the scraper (37) is inclined. Multiple arrays of triangular plates (39) are fixedly connected to the outer wall of the rotating shaft (32), and multiple through slots (310) are formed on the surface of the triangular plates (39). A collection hopper (6) is fixedly connected to the outer wall of the ash hopper (1). The collection hopper (6) is positioned opposite to the emergency discharge port (5). A discharge pipe (7) is fixedly connected to the bottom of the collection hopper (6).

2. The automatic ash removal device for a coal-fired boiler in a power plant according to claim 1, characterized in that: The ash hopper (1) has a hopper rim (11) fixedly connected to its surface, and four sets of symmetrically arranged support legs (12) are fixedly connected to the bottom surface of the hopper rim (11).

3. The automatic ash removal device for a coal-fired boiler in a power plant according to claim 2, characterized in that: The outer wall of the support leg (12) is fixedly connected to a connecting seat (13), which is fixedly connected to the outer wall of the ash hopper (1).

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