An automatic ash removal device for a biomass boiler

Abstract

This utility model discloses an automatic ash removal device for a biomass boiler, relating to the technical field of biomass boiler ash removal devices. It includes: a boiler body with a combustion chamber; a scraper mounted on the inner wall of the combustion chamber via a moving assembly; and a collection bin fixed to the bottom of the scraper via four connecting columns. An ash suction mechanism is mounted on the collection bin. During the ash removal process, a drive motor rotates a threaded rod, causing the scraper and collection bin to move as a whole. Rollers at the bottom of the collection bin contact and roll against the inner wall of the combustion chamber, driving a worm gear to rotate via a coupling and a synchronous belt, which in turn drives the worm wheel and reciprocating screw. A crushing plate moves up and down inside the cylinder to crush larger coke deposits, which are then sucked away by a fan through the dust suction port. This improves the thoroughness of ash removal.

Description

Technical Field

[0001] This utility model relates to the technical field of biomass boiler ash removal devices, specifically an automatic ash removal device for a biomass boiler. Background Technology

[0002] Biomass energy, as an important renewable energy source, has seen widespread application of its utilization technologies, especially direct-fired biomass boiler technology. However, a significant technical challenge exists in the combustion process of biomass fuels (such as straw, wood chips, rice husks, palm shells, etc.): the complex ash characteristics make it extremely easy for ash and slag to accumulate on the boiler's heating surfaces.

[0003] A search revealed prior art publication number CN218672223U, which discloses an automatic ash removal device for the convection zone of a biomass boiler. The device includes a furnace body, a raw coal burner located near the bottom on one side of the furnace body, a combustion fan located on one side of the raw coal burner, a polymerization and settling chamber located on one side of the furnace body, and a mixing chamber located on the other side of the furnace body. The furnace body is connected to an exhaust pipe via a flue gas inlet on one side of its top. A movable trough is located inside the furnace body corresponding to one side of the mixing chamber. This automatic ash removal device for the convection zone of a biomass boiler, through the design of a compressed air compressor, high-temperature alloy connecting pipes, a high-temperature alloy exhaust pipe, a high-temperature alloy outlet pipe, a movable trough, a high-temperature alloy movable plate, and an exhaust port, can deliver gas through the compressed air compressor and various pipes into the mixing chamber for ash blowing and descaling, extending the boiler shutdown time for ash removal to over 90 days.

[0004] However, current technologies cannot completely remove ash and coke buildup on the inner walls of the combustion chamber. Soot blowing methods often leave behind coke residue and cannot simultaneously collect dust, leading to secondary pollution. This results in reduced boiler operating efficiency, increased energy consumption, higher maintenance costs, and exacerbated environmental pollution. For example, ash and coke buildup in the combustion chamber reduces heat transfer efficiency, preventing the full utilization of heat generated by combustion and thus increasing fuel consumption.

[0005] Therefore, based on the above-mentioned search and combined with existing technologies, an automatic ash removal device for biomass boilers is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an automatic ash removal device for biomass boilers to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An automatic ash removal device for a biomass boiler includes: a boiler body, on which a combustion chamber is provided, and a scraper is provided on the inner wall of the combustion chamber via a movable component, and a collection bin is fixedly installed on the bottom surface of the scraper via four connecting columns; and an ash suction mechanism, which is disposed on the collection bin.

[0009] Preferably, the ash-collecting mechanism includes: a cylinder, which is fixedly installed at the center of the collection bin, and multiple dust-collecting ports are opened on the side wall of the cylinder; a fan is fixedly installed on the top surface of the combustion chamber; a connecting pipe is provided between the fan and the top surface of the cylinder; and the ash-collecting mechanism also includes a crushing component.

[0010] Preferably, the crushing assembly includes: a reciprocating screw, which is rotatably mounted on the inner wall of a cylinder, and a crushing plate connected to the outer surface of the reciprocating screw. The surface of the crushing plate is provided with multiple holes to facilitate the passage of dust. The crushing assembly also includes a driving component.

[0011] Preferably, the moving component includes: a threaded rod rotatably connected to the inner wall of the combustion chamber, a drive motor fixedly mounted on the top surface of the combustion chamber, a fixing plate connected to the outer surface of the drive motor, and the side wall of the fixing plate connected to the inner wall of the scraper.

[0012] Preferably, the driving component includes: a support plate, wherein two support plates are provided and respectively fixedly installed on the side wall of a fixed plate, a worm gear is rotatably connected between the two support plates, a worm wheel is rotatably connected to the top surface of the cylinder, a roller is rotatably connected to the bottom surface of the fixed plate through a fixed column, the roller contacts the inner wall of the combustion chamber, a coupling is provided between the reciprocating screw and the side wall of the support plate, a synchronous belt is provided between the two couplings, and the side wall of one of the couplings is connected to the side wall of the worm gear.

[0013] Preferably, the bottom surface of the worm gear is connected to the top surface of the reciprocating lead screw, and the worm gear meshes with the worm.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, a dust removal mechanism is incorporated. During the dust removal process, a drive motor rotates a threaded rod, causing the scraper and collection bin to move as a whole. Rollers at the bottom of the collection bin contact and roll against the inner wall of the combustion chamber, driving a worm gear to rotate via a coupling and synchronous belt, which in turn drives the worm wheel and reciprocating screw. A crushing plate moves up and down inside the cylinder, breaking up larger coke deposits. The crushed coke is then sucked away by a fan through the dust inlet. This improves the thoroughness of dust removal. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the combustion chamber of this utility model;

[0018] Figure 3 This is a schematic diagram of the disassembled structure of the crushing component of this utility model;

[0019] Figure 4 This is a schematic diagram of the overall structure of the drive component of this utility model;

[0020] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0021] In the diagram: 1. Boiler body; 2. Combustion chamber; 3. Scraper; 4. Connecting column; 5. Collection bin; 6. Cylindrical column; 7. Dust suction port; 8. Fan; 9. Connecting pipe; 10. Reciprocating screw; 11. Crushing plate; 12. Threaded rod; 13. Drive motor; 14. Fixing plate; 15. Support plate; 16. Worm gear; 17. Worm wheel; 18. Fixing column; 19. Roller; 20. Coupling; 21. Synchronous belt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In one typical implementation of this application, please refer to Figures 1-5 As shown, an automatic ash removal device for a biomass boiler includes: a boiler body 1, a combustion chamber 2 provided on the boiler body 1, a scraper 3 provided on the inner wall of the combustion chamber 2 via a moving component, a collection bin 5 fixedly installed on the bottom surface of the scraper 3 via four connecting columns 4, a heat insulation plate provided on the bottom surface of the collection bin 5, and the collection bin 5 being made of a high-temperature resistant material.

[0024] The dust collection mechanism is installed on the collection bin 5.

[0025] The dust collection mechanism includes: a cylinder 6, which is fixedly installed at the center of the collection bin 5. Multiple dust collection ports 7 are opened on the side wall of the cylinder 6. A fan 8 is fixedly installed on the top surface of the combustion chamber 2. A connecting pipe 9 is provided between the fan 8 and the top surface of the cylinder 6. The dust collection mechanism also includes a crushing component.

[0026] The crushing assembly includes a reciprocating screw 10, which is rotatably mounted on the inner wall of the cylinder 6. A crushing plate 11 is connected to the outer surface of the reciprocating screw 10. The surface of the crushing plate 11 is provided with multiple holes to facilitate the passage of dust. The crushing assembly also includes a drive component.

[0027] The driving component includes: a support plate 15, two support plates 15 are provided, which are respectively fixedly installed on the side wall of the fixed plate 14. A worm gear 16 is rotatably connected between the two support plates 15. A worm wheel 17 is rotatably connected to the top surface of the cylinder 6. A roller 19 is rotatably connected to the bottom surface of the fixed plate 14 through a fixed column 18. The roller 19 contacts the inner wall of the combustion chamber 2. A coupling 20 is provided on both the reciprocating screw 10 and the side wall of the support plate 15. A synchronous belt 21 is provided between the two couplings 20. The side wall of one coupling 20 is connected to the side wall of the worm gear 16. The bottom surface of the worm wheel 17 is connected to the top surface of the reciprocating screw 10. The worm wheel 17 meshes with the worm gear 16.

[0028] Through the above features, it is possible to clean the ash and break up larger coke deposits at the same time. Specifically, the operator moves the scraper 3 on the inner wall of the combustion chamber 2 by moving the component. At the same time, the blower 8 works and the scraper 3 scrapes off the ash and coke inside the combustion chamber 2 and drops it onto the collection bin 5. The ash and coke enter the interior of the cylinder 6 through the dust suction port 7. The ash is directly sucked into the treatment bin by the blower 8 and the connecting pipe 9.

[0029] The larger coke deposits are still inside the cylinder 6. During the movement of the moving assembly, the roller 19 rotates in contact with the inside of the combustion chamber 2. As the roller 19 rotates, the worm gear 16 drives the worm wheel 17 to rotate through the coupling 20 and the synchronous belt 21. When the worm wheel 17 rotates, the reciprocating screw 10 will rotate synchronously, causing the crushing plate 11 to move up and down inside the cylinder 6 to break up the coke deposits. The broken coke deposits then flow into the processing chamber through the blower 8 and the connecting pipe 9.

[0030] The moving component includes: a threaded rod 12, which is rotatably connected to the inner wall of the combustion chamber 2. A drive motor 13 is fixedly installed on the top surface of the combustion chamber 2. A fixing plate 14 is connected to the outer surface of the drive motor 13. The side wall of the fixing plate 14 is connected to the inner wall of the scraper 3.

[0031] Based on the above features, when the staff turns on the drive motor 13, the fixed plate 14 can be moved, and at the same time the scraper 3, the connecting column 4 and the collection chamber 5 will move synchronously.

[0032] Working principle:

[0033] In operation, the drive motor 13 is started, which drives the threaded rod 12 to rotate. Due to the threaded connection between the fixed plate 14 and the threaded rod 12, the fixed plate 14 moves on the surface of the threaded rod 12, thereby driving the scraper 3 to move along the inner wall of the combustion chamber 2. When the scraper 3 moves, the collection chamber 5 moves synchronously with it. At the same time, the blower 8 is turned on, and the blower 8 sucks the dust in the collection chamber 5 into the cylinder 6 through the connecting pipe 9. The dust enters the cylinder 6 through the dust suction port 7. Smaller dust particles are directly sucked away by the blower 8, while larger coke particles remain inside the cylinder 6. As the scraper 3 moves, the roller 19 at the bottom of the collection chamber 5 contacts and rolls against the inner wall of the combustion chamber 2. The rolling of the roller 19 drives the support plate 15 to rotate through the fixed column 18, and the rotation of the support plate 15 drives the worm gear 16 to rotate. Due to the meshing of the worm gear 16 and the worm wheel 17, the worm wheel 17 rotates accordingly, thereby driving the reciprocating screw 10 to rotate. The rotation of the reciprocating screw 10, driven by the coupling 20 and the synchronous belt 21, causes the crushing plate 11 to move up and down inside the cylinder 6, crushing larger coke deposits. The crushed coke deposits are then sucked away by the fan 8 through the dust suction port 7.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic ash cleaning device for a biomass boiler, characterized in that: include: The boiler body (1) is provided with a combustion chamber (2). The inner wall of the combustion chamber (2) is provided with a scraper (3) through a moving component. The bottom surface of the scraper (3) is fixedly installed with a collection bin (5) through four connecting columns (4). The dust collection mechanism is installed on the collection bin (5).

2. The automatic ash removal device for a biomass boiler according to claim 1, characterized in that: The dust collection mechanism includes: A cylinder (6) is fixedly installed at the center of the collection bin (5). Multiple dust suction ports (7) are opened on the side wall of the cylinder (6). A fan (8) is fixedly installed on the top surface of the combustion chamber (2). A connecting pipe (9) is provided between the fan (8) and the top surface of the cylinder (6). The dust suction mechanism also includes a crushing component.

3. The automatic ash removal device for a biomass boiler according to claim 2, characterized in that: The crushing components include: A reciprocating screw (10) is rotatably mounted on the inner wall of a cylinder (6). A crushing plate (11) is connected to the outer surface of the reciprocating screw (10). The surface of the crushing plate (11) is provided with multiple holes to facilitate the passage of dust. The crushing assembly also includes a drive component.

4. The automatic ash removal device for a biomass boiler according to claim 1, characterized in that: The mobile components include: A threaded rod (12) is rotatably connected to the inner wall of the combustion chamber (2). A drive motor (13) is fixedly installed on the top surface of the combustion chamber (2). A fixing plate (14) is connected to the outer surface of the drive motor (13). The side wall of the fixing plate (14) is connected to the inner wall of the scraper (3).

5. The automatic ash removal device for a biomass boiler according to claim 3, characterized in that: The driving components include: Support plate (15), two support plates (15) are provided and fixedly installed on the side wall of fixed plate (14). A worm gear (16) is rotatably connected between the two support plates (15). A worm wheel (17) is rotatably connected to the top surface of the cylinder (6). A roller (19) is rotatably connected to the bottom surface of the fixed plate (14) through a fixed column (18). The roller (19) contacts the inner wall of the combustion chamber (2). A coupling (20) is provided on both the reciprocating screw (10) and the side wall of the support plate (15). A synchronous belt (21) is provided between the two couplings (20). The side wall of one of the couplings (20) is connected to the side wall of the worm gear (16).

6. The automatic ash removal device for a biomass boiler according to claim 5, characterized in that: The bottom surface of the worm wheel (17) is connected to the top surface of the reciprocating lead screw (10), and the worm wheel (17) meshes with the worm (16).

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