A boiler ash removal structure

Abstract

The utility model relates to a boiler technical field discloses a kind of boiler ash removal structure, including boiler body, exhaust pipe is connected to the top of boiler body, and ash collecting box is connected with the ash pipe below boiler body, ash collecting box is pulled in and is equipped with ash collecting box, and ash cleaning assembly is equipped in boiler body, and ash cleaning assembly includes the air pipe one rotationally equipped in boiler body, the air pipe three is connected with the air pipe two by symmetric setting on the air pipe one, multiple injection holes are arranged on the surface of air pipe three, and power assembly for driving air pipe one rotation is equipped on the top of boiler body, air pocket is equipped on the outer wall of boiler body, and air outlet of air pocket is connected with gas delivery pipe, one end of gas delivery pipe is connected with the top of air pipe one by swivel joint, and pulse valve is connected on gas delivery pipe. By adopting the mode that pulse type injection and rotary blowing are combined, ash is cleaned uniformly and completely, and the effect and efficiency of ash cleaning are improved.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a boiler ash removal structure. Background Technology

[0002] In the field of thermal power generation, boilers are the core equipment. When fuels (such as coal and biomass) are burned in the boiler furnace, a large number of combustion products are produced, including water vapor, carbon dioxide, sulfur dioxide, nitrogen oxides, and particulate matter. These dust and other particles will accumulate on the boiler's heating surfaces, and long-term accumulation will affect the boiler's performance.

[0003] Traditional boiler ash removal methods typically use a single mechanical vibration to remove ash and slag from the boiler's inner wall. This method is limited and may not effectively remove fine, sticky, or high-temperature ash adhering to the boiler's interior. It has low ash removal efficiency and is incomplete, thus affecting the boiler's heat exchange efficiency. Utility Model Content

[0004] (I) Technical problems to be solved The technical problem to be solved by this utility model is to overcome the defects of incomplete ash removal that affect the heat exchange efficiency of the boiler, and to provide a boiler ash removal structure.

[0005] (II) Technical Solution To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a boiler ash removal structure, including a boiler body, an exhaust pipe connected to the top of the boiler body, an ash collection box connected to the bottom of the boiler body through an ash discharge pipe, an ash collection box being pulled out inside the ash collection box, an ash cleaning component being provided inside the boiler body, the ash cleaning component including an air pipe 1 rotatably disposed inside the boiler body, an air pipe 3 connected to the air pipe 1 through symmetrically arranged air pipes 2, a plurality of spray holes arrayed on the surface of the air pipe 3, a power component for driving the air pipe 1 to rotate being provided at the top of the boiler body, an air bag being provided on the outer wall of the boiler body, an air supply pipe being connected to the air outlet of the air bag, one end of the air supply pipe being connected to the top of the air pipe 1 through a rotary joint, and a pulse valve being connected to the air supply pipe.

[0006] As an improvement: a fixed tube is provided symmetrically on the air pipe, and a sliding tube is connected to the fixed tube by a spring. A crushing roller is rotatably provided between the two sliding tubes, and multiple crushing blades are arrayed on the surface of the crushing roller.

[0007] As an improvement: the outer side of the fixed tube is provided with a sliding groove, and the inner wall of the sliding tube is provided with a sliding plate that is adapted to the sliding groove, and the sliding plate slides within the sliding groove.

[0008] As an improvement: the third gas pipe has an L-shaped structure, and a fixed frame is provided at the bottom of the boiler body, on which the first gas pipe is rotatably mounted.

[0009] As an improvement: the boiler body is provided with a cover on top, the power unit is located inside the cover, the gas pipe is rotatably located inside the cover and one end extends to the top of the cover, and the gas supply pipe is made of rigid pipe material.

[0010] As an improvement: the power assembly includes a worm gear fixedly mounted on the outer wall of the gas pipe, and the top of the boiler body is symmetrically provided with vertical plates. A worm gear that meshes with the worm gear is rotatably provided between the two vertical plates, and a motor whose output end is connected to one end of the worm gear is fixedly mounted on the vertical plates.

[0011] As an improvement: the bottom of the boiler body is an inverted cone-shaped structure, and a valve is installed inside the ash discharge pipe.

[0012] (III) Beneficial Effects The advantages of this utility model compared with the prior art are as follows: 1. The pulsed airflow jetting method delivers pulsed high-pressure airflow to the inner wall of the boiler, which has a stronger impact force and can effectively break and remove the ash adhering to the inner wall of the boiler, improving the ash removal effect. The pulsed purging also reduces energy consumption. 2. At the same time, the power unit can drive the ash removal unit to rotate inside the boiler, so that the airflow ejected from the nozzle can fully cover the dust deposition area inside the boiler, achieving more uniform ash removal, reducing ash removal dead corners, and improving the ash removal effect and efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a boiler ash removal structure according to the present invention.

[0014] Figure 2 yes Figure 1 A schematic diagram of the explosion structure.

[0015] Figure 3 yes Figure 1 A schematic diagram of a partial cross-sectional structure in front view.

[0016] Figure 4 yes Figure 2 A schematic diagram of the connection structure between the dust removal component and the power component.

[0017] Figure 5 yes Figure 4 A schematic diagram of the structure of one of the crushing rollers is removed.

[0018] Figure 6 yes Figure 5 A magnified schematic diagram of part A in the middle.

[0019] Figure 7 yes Figure 4 A schematic diagram of the connection structure between the crushing roller and the slide tube.

[0020] Figure 8 yes Figure 7 A magnified schematic diagram of part B in the middle section.

[0021] [Explanation of Labels in the Attached Image] 1. Boiler body; 2. Ash discharge pipe; 3. Ash collection box; 4. Ash collection container; 5. Gas pipe one; 6. Gas pipe two; 7. Gas pipe three; 8. Nozzle; 9. Air manifold; 10. Air supply pipe; 11. Pulse valve; 12. Fixed pipe; 13. Sliding pipe; 14. Spring; 15. Crushing roller; 16. Slide groove; 17. Slide plate; 18. Fixing frame; 19. Cover; 20. Worm gear; 21. Worm; 22. Motor. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.

[0023] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0024] To make the content of this utility model easier to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0025] Combined with appendix Figure 1 and Figure 2 As shown, a boiler ash removal structure includes a boiler body 1, an exhaust pipe connected to the top of the boiler body 1, and an ash collection box 3 connected to the bottom of the boiler body 1 via an ash discharge pipe 2. An ash collection box 4 is pulled out inside the ash collection box 3. The bottom of the boiler body 1 has an inverted conical structure, and a valve is installed inside the ash discharge pipe 2. The valve is used to control the opening and closing of the ash discharge channel. It is opened during ash removal to allow the removed ash to smoothly enter the ash collection box 4 along the bottom of the inverted conical structure of the boiler body 1, making it easy to remove the ash collection box 4 for subsequent emptying. It is closed after ash removal or when the boiler body 1 is in use to seal the ash and prevent fuel inside the boiler body 1 from falling into the ash collection box 4.

[0026] Combined with appendix Figure 3 and Figure 4 As shown, the boiler body 1 is equipped with a ash removal assembly. The ash removal assembly includes an air pipe 5 that is rotatably installed inside the boiler body 1. An air pipe 7 is connected to the air pipe 5 through a symmetrically arranged air pipe 6. Multiple spray holes 8 are arrayed on the surface of the air pipe 7. The air pipe 7 has an L-shaped structure. A fixing frame 18 is provided at the bottom inside the boiler body 1. The air pipe 5 is rotatably installed on the fixing frame 18. With the above structure, the section of the air tube 3 7 that is parallel to the fixed frame 18 can periodically eject airflow to clean the dust accumulated on the fixed frame 18 and reduce the dust residue on the fixed frame 18. Combined with appendix Figure 2 As shown, the top of the boiler body 1 is provided with a power assembly that drives the gas pipe 5 to rotate. The outer wall of the boiler body 1 is provided with a gas chamber 9. The gas outlet of the gas chamber 9 is connected to a gas supply pipe 10. One end of the gas supply pipe 10 is connected to the top of the gas pipe 5 through a rotary joint. This design can ensure that the gas supply pipe 10 is stationary when the gas pipe 5 rotates. A pulse valve 11 is connected to the gas supply pipe 10. Combined with appendix Figure 1 and Figure 4 As shown, the top of the boiler body 1 is provided with a cover 19, and the power assembly is located inside the cover 19. The cover 19 is used to protect the power assembly and reduce the damage caused by the external environment. The gas pipe 5 is rotatably located inside the cover 19 and one end extends to the top of the cover 19. The gas supply pipe 10 is made of rigid pipe material. The power assembly includes a worm gear 20 fixedly installed on the outer wall of the gas pipe 5. The top of the boiler body 1 is symmetrically provided with vertical plates. A worm 21 that meshes with the worm gear 20 is rotatably provided between the two vertical plates. A motor 22 whose output end is connected to one end of the worm 21 is fixedly installed on the vertical plate. With the above structure, the specific steps of the soot blowing are as follows: First, ensure that the ash collection box 4 is empty to facilitate the collection of ash and slag. Open the valve on the ash discharge pipe 2 to establish an ash discharge channel and ensure that the cleaned ash and slag can smoothly enter the ash collection box 4. Pressurize the air tank 9 to the set value and put the pulse valve 11 in the ready-to-trigger state. The motor 22 is started, and the motor 22 drives the worm gear 21 to rotate, thereby driving the worm wheel 20 (which meshes with the worm gear 21 and the air pipe 5, air pipe 6 and air pipe 7 connected to it) to rotate. The pulse valve 11 can periodically send the compressed air in the air tank 9 into the air pipe 5 through the air supply pipe 10, and spray it out at high speed through the nozzle 8. The impact force and shear force of the airflow are used to peel off the ash from the inner wall of the boiler body 1 and blow it off. During the rotation, a pulse airflow in an annular area can be generated, thereby achieving uniform and thorough cleaning of the ash on the inner wall of the boiler body 1. Finally, the ash and slag that are stripped off fall off under the action of gravity and enter the ash collection box 3 along the bottom wall of the inverted cone-shaped boiler body 1, where they are collected in the ash collection box 4.

[0027] In order to further improve the effect and efficiency of dust removal, combined with the attached Figures 4 to 6As shown, the first air pipe 5 is symmetrically provided with fixed pipes 12, which are set at a 90-degree angle to the third air pipe 7. A sliding pipe 13 is sleeved on the fixed pipe 12 through a spring 14. This setting has strong self-adaptability and can adapt to the complex ash accumulation inside the boiler body 1, thereby improving the crushing efficiency and effect. At the same time, it can protect the crushing roller 15 and reduce its damage probability. A crushing roller 15 is rotatably provided between the two sliding pipes 13. The surface of the crushing roller 15 is provided with multiple crushing blades arranged in an array. The blade direction of the crushing blades is consistent with the rotation direction of the crushing roller 15. Among them, the combination of appendix Figures 5 to 8 As shown, the outer side of the fixed tube 12 is provided with a sliding groove 16, and the inner wall of the sliding tube 13 is provided with a sliding plate 17 adapted to the sliding groove 16. The sliding plate 17 slides within the sliding groove 16, and the sliding groove 16 restricts the range of motion of the sliding plate 17, thereby restricting the movement of the sliding tube 13 and preventing the sliding tube 13 from detaching from the fixed tube 12. With the above structure, the crushing blades on the crushing roller 15 come into contact with the ash accumulation on the inner wall of the boiler body 1 via the spring 14, and can be adjusted according to the ash accumulation state. During the rotation of the air pipe 5, the moving crushing roller 15 can rotate, thereby directly and physically crushing the ash accumulation on the inner wall of the boiler body 1, breaking the ash into smaller particles so that they can be stripped off by the subsequently sprayed pulse airflow. The two work together to realize a composite ash removal mode of crushing and blowing at the same time, which improves the ash blowing effect and efficiency.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A boiler ash removal structure, comprising a boiler body (1), wherein an exhaust pipe is connected to the top of the boiler body (1), characterized in that: The boiler body (1) is connected to an ash collection box (3) via an ash discharge pipe (2) at the bottom. An ash collection box (4) is pulled out inside the ash collection box (3). A ash cleaning component is installed inside the boiler body (1). The ash removal assembly includes a first gas pipe (5) rotatably disposed inside the boiler body (1), and a third gas pipe (7) is connected to the first gas pipe (5) by a second gas pipe (6) symmetrically arranged, and a plurality of spray holes (8) are arrayed on the surface of the third gas pipe (7). The top of the boiler body (1) is equipped with a power assembly that drives the gas pipe (5) to rotate; The boiler body (1) has an air tank (9) on its outer wall. An air supply pipe (10) is connected to the air outlet of the air tank (9). One end of the air supply pipe (10) is connected to the top of the air pipe (5) through a rotary joint. A pulse valve (11) is connected to the air supply pipe (10).

2. The boiler ash removal structure according to claim 1, characterized in that: The air pipe (5) is provided with a fixed pipe (12) symmetrically arranged on the upper and lower sides. A sliding pipe (13) is sleeved on the fixed pipe (12) by a spring (14). A crushing roller (15) is rotatably arranged between the two sliding pipes (13). Multiple crushing blades are arranged on the surface of the crushing roller (15).

3. The boiler ash removal structure according to claim 2, characterized in that: The outer side of the fixed tube (12) is provided with a sliding groove (16), and the inner wall of the sliding tube (13) is provided with a sliding plate (17) that is adapted to the sliding groove (16). The sliding plate (17) slides within the sliding groove (16).

4. The boiler ash removal structure according to claim 1, characterized in that: The gas pipe three (7) has an L-shaped structure. The bottom of the boiler body (1) is provided with a fixed frame (18), and the gas pipe one (5) is rotatably mounted on the fixed frame (18).

5. The boiler ash removal structure according to claim 1, characterized in that: The boiler body (1) is provided with a cover (19) on the top, the power assembly is located inside the cover (19), the gas pipe (5) is rotatably located inside the cover (19) and one end extends to the top of the cover (19), and the gas supply pipe (10) is made of rigid pipe material.

6. The boiler ash removal structure according to claim 5, characterized in that: The power assembly includes a worm gear (20) fixed on the outer wall of the gas pipe (5), and the top of the boiler body (1) is symmetrically provided with vertical plates. A worm (21) that meshes with the worm gear (20) is rotatably provided between the two vertical plates. A motor (22) whose output end is connected to one end of the worm (21) is fixed on the vertical plate.

7. The boiler ash removal structure according to claim 1, characterized in that: The bottom of the boiler body (1) is an inverted cone-shaped structure, and a valve is installed inside the ash discharge pipe (2).

Images