Ash removal device for large coal-fired boiler
By designing a cleaning device for large coal-fired boilers, the cooperation of rotating components and cutting components is used to solve the problems of coal ash residue and dust flying in coal-fired boilers, and the automatic collection and combustion efficiency of coal ash are achieved.
Patent Information
- Application Number
- CN202421690874.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The existing coal-fired boilers cannot effectively clean coal ash during operation, resulting in the problem of coal ash remaining and causing dust flying.
A cleaning device including a furnace body, a rotating assembly, a cutting assembly and ash storage box is designed. The rotating assembly drives the coal in the coal-fired chamber through the rotating assembly, and the cutting assembly is used to control the communication and closure of the coal-fired chamber with the outside, so as to realize the automatic collection of coal ash into the ash storage box after coal combustion.
Automatic collection of coal ash and effective dust suppression are achieved, combustion efficiency is improved and dust flying is reduced.
Smart Images
Figure CN223216314U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of boiler ash removal, in particular to a ash cleaning device for a large coal-fired boiler. Background Art
[0002] As a vital energy source, coal plays a crucial role in industrial production and daily life. Coal-fired boilers, fueled by coal, are a highly utilized type of boiler in my country. They are widely used in industries such as textiles, printing and dyeing, papermaking, and food processing, providing steam for processing and heating, bathing, air conditioning, and domestic hot water for businesses, government agencies, hotels, and schools.
[0003] At present, existing coal-fired boilers cannot avoid coal ash residue during cleaning during operation, and cannot effectively guide the discharge of coal ash to avoid dust flying. Utility Model Content
[0004] In order to solve the problem described in the background art that the existing coal-fired boiler cannot avoid the residual coal ash during cleaning during operation, and cannot effectively guide the coal ash to be discharged to avoid dust flying, the utility model proposes the following technical solutions:
[0005] A ash cleaning device for a large coal-fired boiler comprises: a furnace body, a rotating assembly, a discharge assembly and an ash storage box; the furnace body is installed between a heat conduction plate of the coal boiler and the ash storage box, one side of the furnace body is fixedly connected to the heat conduction plate, and the other side of the furnace body is rotatably connected to the discharge assembly, thereby forming a coal combustion chamber for burning coal between the heat conduction plate and the ash storage box; the rotating assembly is used to drive the coal in the coal combustion chamber to roll in the coal combustion chamber; when the discharge assembly rotates, the coal combustion chamber is connected to the outside or remains closed, and the coal in the coal combustion chamber falls into the ash storage box.
[0006] Wherein, the unloading assembly includes: a first curved plate, a second curved plate, a worm and a plurality of turbines matching the worm; the first curved plate and the second curved plate are relatively arranged in the coal-burning chamber, one end of the first curved plate is coaxial with one of the turbines, and the other end of the first curved plate is abutted against one end of the second curved plate; the other end of the second curved plate is coaxial with the other end of the turbine; the worm is arranged on the outer surface of the furnace body, and the two ends of the worm are respectively rotatably connected to one of the turbines; one of the turbines is rotatably arranged on the narrow surface of the inner wall of one side of the coal-burning chamber, and the other turbine is rotatably arranged on the narrow surface of the inner wall of the other side of the coal-burning chamber.
[0007] Furthermore, the threads on both sides of the worm have opposite rotation directions.
[0008] Furthermore, the rotating assembly includes: a drive motor, a rotating shaft and a plurality of blades; the fixed end of the drive motor is fixedly arranged on the outer surface of the furnace body, and the movable end of the drive motor is rotatably connected to the rotating shaft; the rotating shaft is arranged in the coal combustion chamber, and a plurality of the blades are fixedly arranged at intervals on the outer circumference of the rotating shaft, and each of the blades is distributed on the rotating shaft along the circumference and axial direction of the rotating shaft respectively.
[0009] Furthermore, a protrusion on one side of the furnace body forms a feed port communicating with the coal burning cavity and the outside, and a cover plate is rotatably provided at one end of the feed port.
[0010] Furthermore, the ash cleaning device also includes: a filtering device; the filtering device includes: a smoke inlet pipe, an ash removal box, a smoke exhaust pipe and a filter; the smoke inlet pipe connects the coal combustion chamber and the ash removal box, and the smoke exhaust pipe connects the ash removal box and the outside; the filter is arranged in the ash removal box, and the filter is located between the smoke inlet pipe and the smoke exhaust pipe to divide the interior of the ash removal box into a contaminated area and a purified area.
[0011] Furthermore, the filtering device also includes an activated carbon plate arranged below the filter screen; the activated carbon plate is fixedly connected to the filter screen.
[0012] Furthermore, at least one of the outer peripheral surfaces of the dust removal box is a transparent glass plate.
[0013] Beneficial effect: The utility model cleans and collects ash in the coal combustion chamber through the rotation of the rotating component. Under the rotation of the feeding component, the coal combustion chamber can be intermittently connected with the outside, so that the coal ash formed after the coal combustion can directly fall into the ash storage box. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic structural diagram of a ash cleaning device for a large coal-fired boiler according to an embodiment of the present utility model;
[0015] Figure 2 This is a schematic diagram of the back structure of a ash cleaning device for a large coal-fired boiler according to an embodiment of the utility model;
[0016] Figure 3 Schematic diagram of the internal structure of the coal burning chamber according to an embodiment of the present utility model. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solutions and advantages of this application more clear, the present invention will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0018] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.
[0019] Figure 1 The figure is a schematic diagram of the mechanism of a ash cleaning device for a large coal-fired boiler according to an embodiment of the present utility model.
[0020] Reference Figure 1 According to an embodiment of the present invention, an ash cleaning device for a large coal-fired boiler comprises a furnace body 1, a rotating assembly 2, a discharge assembly 3, and an ash storage box 4. The furnace body 1 is installed between the heat conducting plate 5 and the ash storage box 4 of the coal-fired boiler. One side of the furnace body 1 is fixedly connected to the heat conducting plate 5, and the other side of the furnace body 1 is rotatably connected to the discharge assembly 3, thereby forming a coal combustion chamber 11 for burning coal between the heat conducting plate 5 and the ash storage box 4. The rotating assembly 2 is used to drive the coal in the coal combustion chamber 11 to roll within the coal combustion chamber 11.
[0021] The evaporation chamber within the boiler, located above the heat conducting plate 5, is regularly filled with a constant amount of liquid water. During combustion, the furnace body 1 beneath the heat conducting plate 5 heats and evaporates the liquid water in the evaporation chamber, generating steam that drives the devices connected to the boiler. The rotating assembly 2 within the furnace body 1 continuously tumbles the coal within the coal combustion chamber 11, further improving its combustion efficiency. When the unloading assembly 3 rotates, the coal combustion chamber 11 is either connected to the outside or remains sealed, and the coal in the combustion chamber 11 falls into the ash storage box 4.
[0022] Figure 2 This is a schematic diagram of the back structure of a ash cleaning device for a large coal-fired boiler according to an embodiment of the present utility model.
[0023] Refer to Figure 1 and Figure 2Specifically, the unloading assembly 3 comprises a first curved plate 31, a second curved plate 32, a worm 33, and multiple turbines 34 corresponding to the worm 33. The first and second curved plates 31, 32 are respectively positioned within the coal combustion chamber 11 and together form a closed semicircular baffle. When the worm 33 is stationary, the first and second curved plates 31, 32 jointly support the combustion of coal within the coal combustion chamber 11. One end of the first curved plate 31 is rotatably connected to the narrow surface of the inner wall of the coal combustion chamber 11 via a turbine 34, while the other end of the first curved plate 31 abuts against one end of the second curved plate 32. The other end of the second curved plate 32 is rotatably connected to the narrow surface of the other inner wall of the coal combustion chamber 11 via another turbine 34. The worm 33 is rotatably mounted outside the furnace body 1 via a stopper, and the threads on the outer circumferential surfaces of the two ends of the worm 33 have opposite rotation directions. When the worm 33 rotates, the first curved plate 31 and the second curved plate 32 move relative to or toward each other to complete the corresponding dust removal action.
[0024] When the first curved plate 31 and the second curved plate 32 move relative to each other, the coal combustion chamber 11 is connected to the outside, and the coal in the coal combustion chamber 11 falls into the ash storage box 4. When the first curved plate 31 and the second curved plate 32 move toward each other, the coal combustion chamber 11 is isolated from the outside, and the coal continues to be filled and burned to provide heat energy for the moisture in the evaporation chamber.
[0025] Furthermore, the rotating assembly 2 includes: a drive motor 21, a rotating shaft 22 and a plurality of blades 23. The housing (i.e., the fixed end) of the drive motor 21 is fixed on the outer surface of the furnace body 1 on the side opposite to the runner, and the rotor part (i.e., the movable end) of the drive motor 21 is coaxial with the rotating shaft 22 and is rotatably connected, and the two remain in a relatively static state. The rotating shaft 22 is rotatably arranged in the coal combustion chamber 11, and the axial direction of the rotating shaft 22 is the same as the axial direction of the first baffle or the second baffle. Each blade 23 is distributed along the circumference of the rotating shaft 22 and the axial direction of the rotating shaft 22. Preferably, in this embodiment, in the circumference of the rotating shaft 22, the plurality of blades 23 together form a cross-shaped structure. When the drive motor 21 is started, the rotating shaft 22 drives each blade 23 to rotate along the circumference of the first curved plate 31 or the second curved plate 32, thereby rolling the coal in the coal combustion chamber 11 to promote complete combustion of the coal.
[0026] To facilitate quick filling of the coal after the coal is ashed, in this embodiment, the outer peripheral surface of one side of the furnace body 1 is inclined and convex upward, thereby forming a feed port connecting the outside and the coal combustion chamber 11. One end of the feed port is hingedly connected to the cover plate, so that the feed port is blocked when the furnace body 1 is burning normally to prevent temperature loss.
[0027] Figure 3 Schematic diagram of the internal structure of the coal combustion chamber according to an embodiment of the present utility model.
[0028] Reference Figure 3 Preferably, in order to further process the coal ash generated during the combustion process, in this embodiment, the ash cleaning device also includes a filter device 6. The filter device 6 includes: a smoke inlet pipe 61, an ash removal box 62, a smoke exhaust pipe 63 and a filter 64. Among them, the smoke inlet pipe 61 connects the coal combustion chamber 11 and the inside of the ash removal box 62, and the ash removal box 62 is connected to the outside through the smoke exhaust pipe 63. The filter 64 is fixed in the ash removal box 62, and the filter 64 is located between the smoke inlet pipe 61 and the smoke exhaust pipe 63. The smoke generated by the combustion in the coal combustion chamber 11 enters the ash removal box 62 along the smoke inlet pipe 61, and is discharged to the outside through the smoke exhaust pipe 63 after being filtered by the filter 64.
[0029] To further enhance the filtering effect, the filter device 6 in this embodiment further includes an activated carbon plate 65. The activated carbon plate 65 is fixedly mounted below the filter screen 64. The soot adhering to the flue gas flowing out of the ash removal box 62 is adsorbed by the activated carbon plate, thereby ensuring that the soot mixed in the flue gas is removed. To facilitate observation of the service life of the activated carbon plate 65, in another embodiment, at least one of the outer peripheral surfaces of the ash removal box 62 is a transparent glass plate. The color of the activated carbon plate 65 in the ash removal box 62 can be observed through the transparent glass plate, making it easier to replace the activated carbon plate 65 in a timely manner after it reaches the end of its service life.
[0030] In summary, the utility model cleans and collects ash in the coal combustion chamber through the rotation of the rotating component. Under the rotation of the feeding component, the coal combustion chamber can be intermittently connected with the outside, so that the coal ash formed after the coal combustion can directly fall into the ash storage box.
[0031] While the foregoing description describes certain embodiments of the invention, other embodiments are within the scope of the following claims.
[0032] Throughout this specification, the terms "exemplary," "example," and the like are used to mean "serving as an example, instance, or illustration" and do not imply "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described embodiments.
[0033] The above describes in detail the optional implementation methods of the embodiments of the present invention in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details of the above implementation methods. Within the technical concept of the embodiments of the present invention, the technical solutions of the embodiments of the present invention can be modified in a variety of simple ways, and these simple modifications all fall within the scope of protection of the embodiments of the present invention.
[0034] The foregoing description of this specification is provided to enable any person skilled in the art to implement or use the present disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but is intended to be consistent with the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A ash cleaning device for a large coal-fired boiler, characterized in that: include: A furnace body (1), a rotating assembly (2), a feeding assembly (3) and an ash storage box (4); the furnace body (1) is installed between a heat conducting plate (5) of a coal boiler and the ash storage box (4); one side of the furnace body (1) is fixedly connected to the heat conducting plate (5), and the other side of the furnace body (1) is rotatably connected to the feeding assembly (3), thereby forming a coal combustion chamber (11) for burning coal between the heat conducting plate (5) and the ash storage box (4); the rotating assembly (2) is used to drive the coal in the coal combustion chamber (11) to roll in the coal combustion chamber (11); when the feeding assembly (3) rotates, the coal combustion chamber (11) is communicated with the outside or remains closed, and the coal in the coal combustion chamber (11) falls into the ash storage box (4).
2. A ash cleaning device for a large coal-fired boiler according to claim 1, characterized in that: The blanking assembly (3) comprises: a first curved plate (31), a second curved plate (32), a worm (33) and a plurality of turbines (34) matched with the worm (33); the first curved plate (31) and the second curved plate (32) are arranged relative to each other in the coal combustion chamber (11); one end of the first curved plate (31) is coaxial with one of the turbines (34), and the other end of the first curved plate (31) abuts against one end of the second curved plate (32); the other end of the second curved plate (32) is coaxial with the other end of the turbine (34); the worm (33) is arranged on the outer surface of the furnace body (1), and the two ends of the worm (33) are respectively rotatably connected to one of the turbines (34); one of the turbines (34) is rotatably arranged on the narrow surface of the inner wall of one side of the coal combustion chamber (11), and the other turbine (34) is rotatably arranged on the narrow surface of the inner wall of the other side of the coal combustion chamber (11).
3. The ash cleaning device for a large coal-fired boiler according to claim 2, characterized in that: The threads on both sides of the worm (33) have opposite rotation directions.
4. The ash cleaning device for a large coal-fired boiler according to claim 2, characterized in that: The rotating assembly (2) comprises: a driving motor (21), a rotating shaft (22) and a plurality of blades (23); the fixed end of the driving motor (21) is fixedly arranged on the outer surface of the furnace body (1), and the movable end of the driving motor (21) is rotatably connected to the rotating shaft (22); the rotating shaft (22) is arranged in the coal combustion chamber (11), and a plurality of blades (23) are fixedly arranged at intervals on the outer peripheral surface of the rotating shaft (22), and each blade (23) is distributed on the rotating shaft (22) along the circumference of the rotating shaft (22) and the axial direction of the rotating shaft (22).
5. A ash cleaning device for a large coal-fired boiler according to any one of claims 1 to 4, characterized in that: One side of the furnace body (1) is raised to form a feed port (12) communicating with the coal burning cavity (11) and the outside, and a cover plate (13) is rotatably provided at one end of the feed port (12).
6. A ash cleaning device for a large coal-fired boiler according to any one of claims 1 to 4, characterized in that: The ash cleaning device further comprises: a filter device (6); the filter device (6) comprises: a smoke inlet pipe (61), an ash removal box (62), a smoke exhaust pipe (63) and a filter screen (64); the smoke inlet pipe (61) is connected to the coal combustion chamber (11) and the ash removal box (62), and the smoke exhaust pipe (63) is connected to the ash removal box (62) and the outside; the filter screen (64) is arranged in the ash removal box (62), and the filter screen (64) is located between the smoke inlet pipe (61) and the smoke exhaust pipe (63) to divide the interior of the ash removal box (62) into a polluted area and a purified area.
7. The ash cleaning device for a large coal-fired boiler according to claim 6, characterized in that: The filtering device (6) further comprises an activated carbon plate (65) disposed below the filter screen (64); the activated carbon plate (65) is fixedly connected to the filter screen (64).
8. The ash cleaning device for a large coal-fired boiler according to claim 7, characterized in that: At least one of the outer peripheral surfaces of the dust removal box (62) is a transparent glass plate.