A coking removal device for a biomass combustion furnace

Abstract

A kind of biomass combustion furnace is with decoking device. It relates to the field of biomass combustion furnace. It is used to remove the coke in the combustion chamber, the combustion chamber includes coaxially arranged shell and combustion pipe, a plurality of support columns are arranged between the combustion pipe and the shell, the combustion pipe can rotate between a plurality of support columns, including scrapers and guard plate, the guard plate is arranged at the front end of the shell, both ends of the scrapers are provided with connecting strips, one of the connecting strips is connected with the outer wall of the guard plate, and the other connecting strip is connected with the rear end of the shell. The present application drives the combustion pipe by lever, and then completes the decoking operation by the mutual friction between the combustion pipe and the scrapers, which is simple to operate, safe and has the characteristics of high decoking efficiency.

Description

Technical Field

[0001] This application relates to the field of biomass combustion furnaces, and more specifically to a decoking device for biomass combustion furnaces. Background Technology

[0002] In the field of energy utilization, the application of biomass fuels is gradually becoming a research hotspot. Biomass fuels primarily use agricultural and forestry waste as raw materials, such as straw, sawdust, bagasse, and rice husks, distinguishing them from traditional fossil fuels. With increasing environmental awareness and the guidance of national policies, biomass fuels, with their advantages of being clean and renewable, are showing enormous application potential in areas such as heating. They not only effectively utilize agricultural and forestry waste and reduce resource waste, but also alleviate energy pressure to a certain extent, playing a significant role in promoting sustainable development. The heat energy generated by their combustion can be widely used in boilers, spraying, die casting, garment manufacturing, hotels, heat treatment, and many other heating equipment, providing new energy options for the production and operation of various industries.

[0003] Regarding the issue of cleaning coke residue inside biomass combustion furnaces, in existing technologies, a thick layer of coke residue forms on the inner wall of the combustion chamber after the furnace has been running for a period of time. To address this problem, the conventional approach is for operators to insert a descaling rake into the combustion chamber after the furnace has stopped operating. The operator manually moves the rake back and forth within the combustion chamber to scrape away the coke residue. This is a common descaling method widely used in many biomass combustion furnaces. In addition, in some cases, auxiliary tools, such as brushes, are used to simply clean the inner wall of the combustion chamber to remove some loosely attached coke residue. In other situations, combustion parameters are adjusted in an attempt to reduce coke residue formation, but this method cannot completely eliminate coke residue production, and ultimately, physical descaling methods are still necessary.

[0004] However, existing coking removal methods have significant drawbacks. Using coking removal rakes is inefficient, requiring operators to spend considerable time and effort to complete the task. Furthermore, operators must stand along the axis of the combustion chamber during the removal process; as coke residue is scraped out, it may fall onto the operator, posing a significant threat to their personal safety and creating a clear safety hazard. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this application provides a decoking device for a biomass combustion furnace.

[0006] This application adopts the following technical solution: a descaling device for a biomass combustion furnace, used to remove coke residue from the combustion chamber, the combustion chamber including a coaxially arranged outer shell and a combustion tube, a plurality of support columns between the combustion tube and the outer shell, the combustion tube being rotatable between the plurality of support columns, including a scraper and a guard plate, the guard plate being located at the front end of the outer shell, and connecting strips being provided at both ends of the scraper, one connecting strip being connected to the outer wall of the guard plate, and the other connecting strip being connected to the rear end of the outer shell.

[0007] The radial cross-section of the scraper is triangular, and the edges of the scraper are in contact with the inner wall of the combustion tube.

[0008] Optionally, the rear end of the combustion tube is flush with the rear end of the outer casing, and the length of the combustion tube is greater than the length of the outer casing; The protective plate is semi-circular, and a stepped groove is provided on the inner wall of the protective plate. When the rear side wall of the protective plate is fixed to the front end of the outer shell, the front end of the combustion tube is adapted to be inserted into the stepped groove.

[0009] Optionally, the protective plate is connected to the upper front end of the outer casing by several bolts, and the combustion tube can rotate within the stepped groove.

[0010] Optionally, the inner wall of the protective plate is further provided with a sliding groove, the sliding groove and the stepped groove are both semi-circular, the sliding groove and the stepped groove are connected and close to the end of the outer shell; The outer wall of the combustion tube is provided with several levers at the front end, and the levers are arranged at intervals along the same circumference. The levers can rotate within the slide groove.

[0011] Optionally, the number of the levers within the slide groove is greater than the number of the levers outside the slide groove.

[0012] Optionally, the scraper strip has several notches on the edge where it fits against the combustion tube, and the notches are spaced apart along the length of the scraper strip.

[0013] Optionally, the top of the housing is provided with a processing window that extends along the length of the housing. The flame nozzle or jet nozzle passes through the processing window to the inside of the housing and heats or purifies the combustion tube.

[0014] Optionally, a sealing strip is adapted to be provided inside the processing window, and a pair of lifting grippers are provided on the top of the sealing strip. Limiting posts are provided on the top of the outer casing and on both sides of the processing window. The limiting posts pass through the lifting grippers, and pins are detachably provided on the limiting posts. The lifting gripper is used to hold and lift the sealing strip upwards, and the pin is used to lock the lifting gripper.

[0015] 1. The lever at the front end of the outer wall of the combustion tube can rotate in the groove on the inner wall of the guard plate, which facilitates the rotation of the combustion tube. Since the edge of the scraper is in contact with the inner wall of the combustion tube, it can automatically remove the coke residue from the inner wall of the combustion chamber when the combustion tube rotates, thereby improving the coke removal efficiency and avoiding the need for operators to manually insert the coke removal tool into the combustion chamber to remove coke, thus eliminating the safety hazard of operators being hit by falling coke residue. 2. The burner nozzle is inserted into the inner side of the outer shell through the treatment window to heat and burn the combustion tube, thereby softening the coke residue. The jet nozzle is also inserted into the inner side of the outer shell through the treatment window to purge the combustion tube, thereby removing the coke residue and greatly improving the coke removal efficiency. Attached Figure Description

[0016] Figure 1 This is an illustrative three-dimensional representation of the present application. Figure 1 ; Figure 2 This is an illustrative three-dimensional representation of the present application. Figure 2 ; Figure 3 This is a reference diagram of the explosion state of this application; Figure 4 This is a reference diagram showing the assembly state of the outer casing and the scraper strip; Figure 5 It is a schematic 3D diagram of the scraper strip; In the diagram: 1. Outer shell; 11. Support column; 12. Processing window; 13. Sealing strip; 14. Lifting grab plate; 15. Limiting column; 16. Pin; 2. Combustion tube; 20. Lever; 3. Slag scraper; 31. Connecting strip; 32. Notch; 4. Protective plate; 41. Step groove; 42. Bolt; 43. Slide groove. Detailed Implementation

[0017] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0018] like Figure 1-5 As shown, a descaling device for a biomass combustion furnace includes a scraper bar 3 and a protective plate 4. The two ends of the scraper bar 3 are connected to the outer wall of the protective plate 4 and the rear end of the outer shell 1 respectively via connecting strips 31. The edges of the scraper bar 3 are in contact with the inner wall of the combustion tube 2, which can rotate between support columns 11. The protective plate 4 is located at the front end of the outer shell 1. Thus, when the combustion tube 2 rotates, the scraper bar 3 can remove the slag from the inner wall of the combustion tube 2, achieving a highly efficient descaling effect and avoiding the problems of low efficiency and safety hazards associated with manual descaling.

[0019] The connecting strip 31 is fixedly connected to the scraper strip 3 and the guard plate 4 by welding. Welding ensures a strong connection. Alternatively, bolts 42 can be used for easy disassembly and replacement. The radial cross-section of the scraper strip 3 is triangular. This shape allows the edges of the scraper strip 3 to better fit the inner wall of the combustion tube 2 when in contact, improving the decoking effect. The scraper strip 3 can be made of wear-resistant alloy material to extend its service life, or it can be made of ceramic material, which has good wear resistance and high temperature resistance. The scraper strip 3 is tightly connected to the connecting strips 31 at both ends to form an integral scraping structure. It can reliably rotate while the outer shell 1 remains stationary and the combustion tube 2 rotates, thereby achieving continuous and automatic decoking of the inner wall of the combustion tube 2.

[0020] A stepped groove 41 is provided on the inner wall of the protective plate 4, and its shape is adapted to the front end of the combustion tube 2. When the rear side wall of the protective plate 4 is fixed to the front end of the outer shell 1, the front end of the combustion tube 2 can be fitted into the stepped groove 41. The machining precision of the stepped groove 41 is required to ensure that the combustion tube 2 can rotate smoothly in the stepped groove 41 and to limit the movement of the combustion tube 2. The length of the combustion tube 2 is greater than the length of the outer shell 1, and the rear end of the combustion tube 2 is flush with the rear end of the outer shell 1. In this way, a space is formed between the bottom of the protective plate 4 and the front end of the outer shell 1. Several levers 20 are provided on the front end of the outer wall of the combustion tube 2. The levers 20 are arranged at intervals along the same circumference, and the number is determined according to actual needs. A sliding groove 43 is also provided on the inner wall of the protective plate 4. The sliding groove 43 and the stepped groove 41 are both semi-circular. The sliding groove 43 is connected to the stepped groove 41 and is closer to the end of the outer shell 1. Since the guard plate 4 is connected to the upper front side of the housing 1 by several bolts 42, and the space is located on the lower front side of the housing 1, a portion of the several levers 20 will be located in the space, and the remaining portion will be located in the slide groove 43.

[0021] When decoking is required on the combustion tube 2, the operator uses a socket wrench or similar tool to move the lever 20, causing it to slide from space into the groove 43. This drives the combustion tube 2. The edge of the scraper 3 contacts the top of the combustion tube 2, and the rotation of the combustion tube 2 interferes with the scraper 3, thus achieving decoking. Furthermore, the scraper 3 has several notches 32 on its contact edge with the combustion tube 2, spaced along the length of the combustion tube 2. When the combustion tube 2 rotates, the notches 32 compress and crush the coke residue, effectively improving decoking efficiency.

[0022] The top of the outer casing 1 is provided with a processing window 12, which extends along the length of the outer casing 1. This allows the burner or jet nozzle to pass through the processing window 12 and enter the inner side of the outer casing 1 to heat or purge the combustion tube 2, thereby promoting the removal of coke residue from the combustion tube 2 and maximizing the decoking efficiency. A sealing strip 13 is fitted inside the processing window 12, and a pair of lifting grippers 14 are provided on the top of the sealing strip 13 for easy gripping by the operator. Limiting posts 15 are provided on the top of the outer casing 1 and on both sides of the processing window 12. The limiting posts 15 pass through the lifting grippers 14, and pins 16 are detachably provided on the limiting posts 15. The pins 16 are used to lock the lifting grippers 14 to prevent the sealing strip 13 from falling out of the processing window 12. In this way, when the burner or jet nozzle is not needed for auxiliary decoking, the sealing strip 13 can reliably seal the processing window 12 without affecting the normal use of the combustion chamber.

[0023] The implementation principle of this embodiment is as follows: by the contact between the scraper strip 3 and the inner wall of the combustion tube 2, automatic decoking is achieved when the combustion tube 2 rotates, avoiding the problems of low efficiency and safety hazards associated with manual decoking. The guard plate 4 provides support and protection for the scraper strip 3, and at the same time, provides operating space for the rotation of the lever 20. The lever 20 on the combustion tube 2 cooperates with the sliding groove 43 on the inner wall of the guard plate 4 to ensure the stability of the rotation of the combustion tube 2. The processing window 12 on the top of the outer shell 1 facilitates operations such as heating or purging of the combustion tube 2, playing an auxiliary role in decoking.

[0024] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A descaling device for a biomass combustion furnace, used to remove coke residue from a combustion chamber, the combustion chamber comprising a coaxially arranged outer shell (1) and a combustion tube (2), wherein a plurality of support columns (11) are provided between the combustion tube (2) and the outer shell (1), and the combustion tube (2) is rotatable among the plurality of support columns (11), characterized in that, It includes a scraper (3) and a guard plate (4). The guard plate (4) is located at the front end of the outer shell (1). Both ends of the scraper are provided with connecting strips (31). One connecting strip (31) is connected to the outer wall of the guard plate (4), and the other connecting strip (31) is connected to the rear end of the outer shell (1). The radial cross-section of the scraper (3) is triangular, and the edges of the scraper (3) are in contact with the inner wall of the combustion tube (2).

2. The decoking device for a biomass combustion furnace according to claim 1, characterized in that, The rear end of the combustion tube (2) is flush with the rear end of the outer shell (1), and the length of the combustion tube (2) is greater than the length of the outer shell (1). The protective plate (4) is semi-circular, and the inner wall of the protective plate (4) is provided with a stepped groove (41). When the rear side wall of the protective plate (4) is fixed to the front end of the outer shell (1), the front end of the combustion tube (2) is adapted to be inserted into the stepped groove (41).

3. The decoking device for a biomass combustion furnace according to claim 2, characterized in that, The protective plate (4) is connected to the upper front end of the outer shell (1) by several bolts (42), and the combustion tube (2) can rotate within the stepped groove (41).

4. A decoking device for a biomass combustion furnace according to claim 2, characterized in that, The inner wall of the guard plate (4) is also provided with a sliding groove (43), the sliding groove (43) and the stepped groove (41) are both semi-circular, the sliding groove (43) and the stepped groove (41) are connected and close to the end of the outer shell (1); The outer wall of the combustion tube (2) is provided with a number of levers (20), which are arranged at intervals along the same circumference. The levers (20) can rotate in the slide groove (43).

5. A decoking device for a biomass combustion furnace according to claim 4, characterized in that, The number of the levers (20) inside the groove (43) is greater than the number of the levers (20) outside the groove (43).

6. A decoking device for a biomass combustion furnace according to claim 4, characterized in that, The scraper strip (3) has several notches (32) on the edge where it fits against the combustion tube (2), and the notches (32) are spaced apart along the length of the scraper strip (3).

7. A decoking device for a biomass combustion furnace according to claim 6, characterized in that, The top of the outer casing (1) is provided with a processing window (12), which extends along the length of the outer casing (1). The flame nozzle or jet nozzle passes through the processing window (12) into the inner side of the outer casing (1) and heats or purifies the combustion tube (2).

8. A decoking device for a biomass combustion furnace according to claim 7, characterized in that, A sealing strip (13) is adapted to be provided inside the processing window (12). A pair of lifting grippers (14) are provided on the top of the sealing strip (13). Limiting posts (15) are provided on the top of the outer shell (1) and on both sides of the processing window (12). The limiting posts (15) pass through the lifting grippers (14). A pin (16) is detachably provided on the limiting posts (15). The lifting gripper (14) is used to hold and lift the sealing strip (13) upwards, and the pin (16) is used to lock the lifting gripper (14).

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