Return type ash discharging device for dry type ash removal system of thermal power plant

Abstract

The utility model relates to the technical field of thermal power plant ash unloading devices, in particular to a material returning type ash unloading device for a thermal power plant dry type ash removal system, which comprises an ash silo, an ash conveying device and a pipeline inner wall ash unloading cleaning device positioned on one side in the ash conveying device, and the ash conveying device comprises an ash falling pipeline, an ash conveying pipeline and a connecting pipeline. The ash conveying pipeline is located between the ash falling pipeline and the connecting pipeline and is a hollow pipe with two through ends, and an anti-escape assembly is arranged on the inner wall of one end of the ash conveying pipeline; the ash conveying device and the pipeline inner wall ash discharging and cleaning device are integrated to achieve a higher-degree synergistic effect, the ash conveying device is connected with the smoke exhaust pipe of the thermal power plant to convey ash, the pipeline inner wall ash discharging and cleaning device conducts ash removal type ash discharging on the inner wall of the ash conveying pipeline of the ash conveying device, the ash conveying pipeline is prevented from being blocked, the maintenance cost is reduced, and the ash conveying efficiency is improved. The equipment utilization rate is improved, and the design is optimized, so that the operation efficiency and reliability of the whole system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ash unloading devices in thermal power plants, in particular to a material-returning ash unloading device for a dry ash removal system in a thermal power plant. Background Art

[0002] The ash and slag formed after burning coal in thermal power plants can be used as ingredients for the production of cement, hollow bricks, and red bricks. They can also be used as road filling materials for road construction, roadbed or paving. They have certain use value, so power plants can sell ash and slag to obtain considerable economic benefits.

[0003] A fly ash unloading device is a device used to treat waste gas containing dust particles (also called "fly ash" or "return ash") generated by coal-fired power plants or industrial boilers. The main purpose of this device is to collect the return ash containing a large amount of dust particles from the chimney or other exhaust pipes and transport it safely to the ground, thereby preventing these particles from entering the atmosphere and causing environmental pollution.

[0004] The prior art proposes a return-type ash unloading device for a dry ash removal system of a thermal power plant, comprising an ash conveying pipeline. The return-type ash unloading device is connected to the ash conveying pipeline of the ash removal system and the top of the ash bin. The return-type ash unloading device is a box body composed of a metal plate and a metal guide pipe. The feed end of the metal guide pipe of the return-type ash unloading device is connected to the ash conveying pipeline by a flange connection, the return end of the metal guide pipe is connected by a flange cover, and the box body outlet is connected to the embedded device on the top of the ash bin by a flange connection.

[0005] However, in the current existing technology, the return-type ash unloading device is a box composed of a metal plate and a metal guide pipe, and the feed end of the metal guide pipe is connected to the ash conveying pipeline. Since there is no ash removal and return component inside the metal guide pipe, the material will stick to the inner wall of the metal guide, and it is entirely up to the material itself to fill the return part of the metal guide pipe first. After the return part is filled with material, the subsequently transported material hits the material at the return part and falls into the ash bin, resulting in poor unloading effect, affecting use and unstable system operation. Utility Model Content

[0006] The utility model aims to provide a return-type ash unloading device for a dry ash removal system of a thermal power plant, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A return-type ash unloading device for a dry ash removal system in a thermal power plant comprises an ash bin, an ash conveying device and an ash unloading and cleaning device for the inner wall of a pipe located on one side of the ash conveying device. The ash conveying device comprises an ash falling pipe, an ash conveying pipe and a connecting pipe. The ash conveying pipe is located between the ash falling pipe and the connecting pipe. The ash conveying pipe is a hollow pipe with two ends connected. An anti-escape component is arranged on the inner wall of one end of the ash conveying pipe.

[0009] As a preferred solution of the utility model, the ash falling pipe is vertically located on the top of the ash bin, the bottom of the ash falling pipe is connected to the top of the ash bin through a first fixed flange, the top of the ash falling pipe is connected to the end of the ash conveying pipe away from the anti-escape component through a second fixed flange, the ash conveying pipe is parallel to the top of the ash bin, one end of the connecting pipe is connected to the top of one end of the ash conveying pipe close to the anti-escape component, and the other end of the connecting pipe is connected to the exhaust pipe of the thermal power plant.

[0010] As a preferred solution of the utility model, the dust unloading and cleaning device for the inner wall of the pipeline includes a fixed box, a fixed rod, a spiral cleaning blade, a conveying motor and a telescopic pushing rod. The fixed rod, spiral cleaning blade, conveying motor and telescopic pushing rod are located inside the fixed box, and the spiral cleaning blades are distributed on the outer wall of the fixed rod. One end of the fixed rod is connected to the output end of the conveying motor through a coupling, and the telescopic pushing rod is located on the side of the conveying motor away from the fixed rod, and the output end of the telescopic pushing rod is fixed to the outer wall of the conveying motor.

[0011] As a preferred solution of the utility model, the fixed box is located outside the ash conveying pipeline close to the anti-escape component, the fixed box is connected with the ash conveying pipeline, the bottom of the telescopic push rod is fixed to the inner wall of the bottom of the fixed box, and the outer circumferential wall of the spiral cleaning blade is abutted against the inner circumferential wall of the fixed box.

[0012] As a preferred solution of the utility model, the anti-escape component includes a check plate, which is located between the fixed box and the end of the ash conveying pipe, one end of the check plate is connected to the inner wall of the connection between the ash conveying pipe and the connecting pipe through a rotating shaft, and the outer circumferential wall of the check plate matches the inner circumferential wall structure of the ash conveying pipe and the connecting pipe.

[0013] As a preferred solution of the utility model, when the pipeline inner wall dust unloading and cleaning device is working, the end of the anti-return plate away from the rotating shaft abuts against the inner wall of the connecting pipeline.

[0014] As a preferred solution of the utility model, the conveying motor and the telescopic pushing rod are connected to an external power supply mechanism through a wire.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In response to the problems raised in the background technology, the present application integrates the ash conveying device and the pipeline inner wall ash unloading and cleaning device to achieve a higher degree of synergy. The ash conveying device is connected to the smoke exhaust pipe of the thermal power plant for ash conveying, and the pipeline inner wall ash unloading and cleaning device performs ash removal on the inner wall of the ash conveying pipeline of the ash conveying device to prevent blockage of the ash conveying pipeline, reduce maintenance costs, improve equipment utilization, optimize the design, and improve the operating efficiency and reliability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side view of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the connection of the overall ash conveying device of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the dust removal and cleaning device for the inner wall of a pipeline of the utility model;

[0020] Figure 4 For this utility model Figure 2 Enlarged view of area A in the middle.

[0021] In the figure: 1. ash bin; 2. ash conveying device; 21. ash falling pipe; 211. first fixed flange; 212. second fixed flange; 22. ash conveying pipe; 23. connecting pipe; 24. anti-escape component; 241. check plate; 3. ash unloading and cleaning device for the inner wall of the pipe; 30. fixed box; 31. fixed rod; 32. spiral cleaning blade; 33. conveying motor; 34. telescopic push rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention.

[0023] Example

[0024] See also Figure 1-4The utility model provides a technical solution: a return-type ash unloading device for a dry ash removal system of a thermal power plant, comprising an ash bin 1, an ash conveying device 2 and a pipeline inner wall ash unloading and cleaning device 3 located on one side of the ash conveying device 2, the ash conveying device 2 comprising an ash falling pipeline 21, an ash conveying pipeline 22 and a connecting pipeline 23, the ash conveying pipeline 22 is located between the ash falling pipeline 21 and the connecting pipeline 23, the ash conveying pipeline 22 is a hollow pipe with two ends connected, and an anti-escape component 24 is arranged on the inner wall of one end of the ash conveying pipeline 22; The ash falling pipe 21 is vertically located at the top of the ash bin 1, and the bottom of the ash falling pipe 21 is connected to the top of the ash bin 1 through a first fixed flange 211, and the top of the ash falling pipe 21 is connected to the end of the ash conveying pipe 22 away from the anti-escape component 24 through a second fixed flange 212. The ash conveying pipe 22 is parallel to the top of the ash bin 1, and one end of the connecting pipe 23 is connected to the top of the end of the ash conveying pipe 22 close to the anti-escape component 24, and the other end of the connecting pipe 23 is connected to the exhaust pipe of the thermal power plant.

[0025] It should be noted that the present application integrates the ash conveying device 2 and the pipeline inner wall ash unloading and cleaning device 3 to achieve a higher degree of synergy. The ash conveying device 2 is connected to the smoke exhaust pipe of the thermal power plant to convey ash, and the pipeline inner wall ash unloading and cleaning device 3 performs ash removal on the inner wall of the ash conveying pipeline 22 of the ash conveying device 2 to prevent the ash conveying pipeline 22 from being blocked, thereby reducing maintenance costs, improving equipment utilization, and optimizing design to improve the operating efficiency and reliability of the entire system.

[0026] Furthermore, by setting an anti-escape component 24 at one end of the ash conveying pipe 22, the dust in the ash conveying pipe 22 is prevented from escaping into the ash unloading and cleaning device 3 on the inner wall of the pipe during transportation, thereby affecting the ash unloading and cleaning device 3 on the inner wall of the pipe, reducing the possibility of dust escaping from the ash unloading and cleaning device 3 on the inner wall of the pipe to the outside, thereby reducing the impact on nature.

[0027] See also Figure 2 and 3 The pipeline inner wall ash unloading and cleaning device 3 includes a fixed box 30, a fixed rod 31, a spiral cleaning blade 32, a conveying motor 33 and a telescopic pushing rod 34. The fixed rod 31, the spiral cleaning blade 32, the conveying motor 33 and the telescopic pushing rod 34 are located inside the fixed box 30, and the spiral cleaning blade 32 is distributed on the outer wall of the fixed rod 31. One end of the fixed rod 31 is connected to the output end of the conveying motor 33 through a coupling. The telescopic pushing rod 34 is located on the side of the conveying motor 33 away from the fixed rod 31, and the output end of the telescopic pushing rod 34 is fixed to the outer wall of the conveying motor 33; the fixed box 30 is located outside the ash conveying pipeline 22 close to the anti-escape component 24, the fixed box 30 is connected with the ash conveying pipeline 22 through, the bottom of the telescopic pushing rod 34 is fixed to the inner wall of the bottom of the fixed box 30, and the outer circumferential wall of the spiral cleaning blade 32 abuts against the inner circumferential wall of the fixed box 30; the conveying motor 33 and the telescopic pushing rod 34 are connected to an external power supply mechanism through a wire.

[0028] It should be noted that, in this embodiment, by arranging a pipeline inner wall ash removal and cleaning device 3 on one side of the ash conveying pipeline 22 in the horizontal direction, the inside and inner wall of the ash conveying pipeline 22 are ash removed to prevent the ash conveying pipeline 22 from being blocked, which affects the ash removal of the ash conveying pipeline 22, reduces maintenance costs, improves equipment utilization, and has high operating efficiency and reliability;

[0029] Furthermore, when it is necessary to perform ash removal on the ash conveying pipe 22, start the conveying motor 33 and the telescopic pushing rod 34, the telescopic pushing rod 34 pushes the conveying motor 33 to move forward slowly, the conveying motor 33 drives the fixed rod 31 to rotate, and the spiral cleaning blades 32 on the fixed rod 31 perform ash removal conveying on the inside of the ash conveying pipe 22. When the dust reaches the top of the ash falling pipe 21, it enters the ash bin 1 through the ash falling pipe 21 for unified collection.

[0030] See also Figure 2 and 4 The anti-escape component 24 includes a check plate 241, which is located between the fixed box 30 and the end of the ash conveying pipe 22. One end of the check plate 241 is connected to the inner wall of the connection between the ash conveying pipe 22 and the connecting pipe 23 through a rotating shaft, and the outer circumferential wall of the check plate 241 matches the inner circumferential wall structure of the ash conveying pipe 22 and the connecting pipe 23; when the pipeline inner wall ash unloading and cleaning device 3 is working, the end of the check plate 241 away from the rotating shaft abuts against the inner wall of the connecting pipe 23.

[0031] It should be noted that, in the present embodiment, one end of the check plate 241 is connected to the inner wall of the connection between the ash conveying pipe 22 and the connecting pipe 23 through a rotating shaft. When the check plate 241 is closed, the check plate 241 is located in the ash conveying pipe 22 and abuts against the inner wall of the ash conveying pipe 22. When the ash conveying pipe 22 is unloaded by ash removal, the conveying motor 33 and the telescopic push rod 34 are started, and the telescopic push rod 34 pushes the conveying motor 33 to move forward slowly, and the thrust check plate 241 is opened. At this time, the check plate 241 is located in the connecting pipe 23 and abuts against the inner wall of the connecting pipe 23, preventing smoke and dust from entering the fixed box 30 and affecting the internal equipment of the fixed box 30, reducing the possibility of dust escaping from the ash unloading and cleaning device 3 on the inner wall of the pipe to the outside, and reducing the impact on nature.

[0032] The utility model workflow:

[0033] When it is necessary to perform ash removal unloading on the ash conveying pipeline 22, the conveying motor 33 and the telescopic pushing rod 34 are started. The telescopic pushing rod 34 pushes the conveying motor 33 to move forward slowly, and the thrust check plate 241 is opened. At this time, the check plate 241 is located in the connecting pipeline 23 and abuts against the inner wall of the connecting pipeline 23 to prevent smoke and dust from entering the fixed box 30. The conveying motor 33 drives the fixed rod 31 to rotate, and the spiral cleaning blade 32 on the fixed rod 31 performs ash removal unloading on the inside of the ash conveying pipeline 22. When the dust reaches the top of the ash falling pipeline 21, it enters the ash bin 1 through the ash falling pipeline 21 for unified collection. When the ash removal unloading is completed, the telescopic pushing rod 34 drives the conveying motor 33 to move forward slowly, and the thrust check plate 241 is opened. At this time, the check plate 241 is located in the connecting pipeline 23 and abuts against the inner wall of the connecting pipeline 23 to prevent smoke and dust from entering the fixed box 30. The conveying motor 33 drives the fixed rod 31 to rotate, and the spiral cleaning blade 32 on the fixed rod 31 performs ash removal unloading on the inside of the ash conveying pipeline 22. When the dust reaches the top of the ash falling pipeline 21, it enters the ash bin 1 through the ash falling pipeline 21 for unified collection. 33 is slowly retracted and reset. When it passes the connection between the ash conveying pipeline 22 and the connecting pipeline 23, the non-return plate 241 is reset and closed. The non-return plate 241 is located in the ash conveying pipeline 22 and abuts against the inner wall of the ash conveying pipeline 22, and the ash conveying pipeline 22 conveys ash. The present application integrates the ash conveying device 2 and the pipeline inner wall ash unloading and cleaning device 3 to achieve a higher degree of synergy. The ash conveying device 2 is connected to the exhaust pipe of the thermal power plant for ash conveying. The pipeline inner wall ash unloading and cleaning device 3 performs ash removal on the inner wall of the ash conveying pipeline 22 of the ash conveying device 2 to prevent the ash conveying pipeline 22 from being blocked, reduce maintenance costs, improve equipment utilization, optimize design, and improve the operating efficiency and reliability of the entire system.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A return-type ash unloading device for a dry ash removal system of a thermal power plant, comprising an ash bin (1), an ash conveying device (2), and an ash unloading and cleaning device (3) for the inner wall of a pipeline located on one side of the ash conveying device (2), characterized in that: The ash conveying device (2) comprises an ash falling pipe (21), an ash conveying pipe (22) and a connecting pipe (23); the ash conveying pipe (22) is located between the ash falling pipe (21) and the connecting pipe (23); the ash conveying pipe (22) is a hollow pipe with two ends connected; an anti-escape component (24) is provided on the inner wall of one end of the ash conveying pipe (22).

2. The return-type ash unloading device for a dry ash removal system of a thermal power plant according to claim 1, characterized in that: The ash falling pipe (21) is vertically located at the top of the ash bin (1); the bottom of the ash falling pipe (21) is connected to the top of the ash bin (1) via a first fixed flange (211); the top of the ash falling pipe (21) is connected to the end of the ash conveying pipe (22) away from the anti-escape component (24) via a second fixed flange (212); the ash conveying pipe (22) is parallel to the top of the ash bin (1); one end of the connecting pipe (23) is connected to the top of one end of the ash conveying pipe (22) close to the anti-escape component (24); and the other end of the connecting pipe (23) is connected to the smoke exhaust pipe of the thermal power plant.

3. The return-type ash unloading device for a dry ash removal system of a thermal power plant according to claim 1, characterized in that: The dust removal and cleaning device (3) for the inner wall of a pipeline comprises a fixed box (30), a fixed rod (31), a spiral cleaning blade (32), a conveying motor (33) and a telescopic pushing rod (34); the fixed rod (31), the spiral cleaning blade (32), the conveying motor (33) and the telescopic pushing rod (34) are located inside the fixed box (30); the spiral cleaning blade (32) is distributed on the outer wall of the fixed rod (31); one end of the fixed rod (31) is connected to the output end of the conveying motor (33) through a coupling; the telescopic pushing rod (34) is located on a side of the conveying motor (33) away from the fixed rod (31); and the output end of the telescopic pushing rod (34) is fixed to the outer wall of the conveying motor (33).

4. The return-type ash unloading device for a dry ash removal system of a thermal power plant according to claim 3, characterized in that: The fixed box (30) is located outside the ash conveying pipeline (22) near the anti-escape component (24), the fixed box (30) is connected to the ash conveying pipeline (22), the bottom of the telescopic push rod (34) is fixed to the inner wall of the bottom of the fixed box (30), and the outer circumferential wall of the spiral cleaning blade (32) is in contact with the inner circumferential wall of the fixed box (30).

5. The return-type ash unloading device for a dry ash removal system of a thermal power plant according to claim 3, characterized in that: The anti-escape component (24) includes a check plate (241), and the check plate (241) is located between the fixed box (30) and the end of the ash conveying pipe (22). One end of the check plate (241) is connected to the inner wall of the connection between the ash conveying pipe (22) and the connecting pipe (23) through a rotating shaft. The outer circumferential wall of the check plate (241) matches the inner circumferential wall structure of the ash conveying pipe (22) and the connecting pipe (23).

6. The return-type ash unloading device for a dry ash removal system of a thermal power plant according to claim 5, characterized in that: When the pipeline inner wall dust removal and cleaning device (3) is in operation, the end of the anti-return plate (241) away from the rotating shaft abuts against the inner wall of the connecting pipeline (23).

7. The return-type ash unloading device for a dry ash removal system of a thermal power plant according to claim 3, characterized in that: The conveying motor (33) and the telescopic pushing rod (34) are connected to an external power supply mechanism via a wire.

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