Biomass fuel boiler with deslagging function

Abstract

The invention discloses a biomass fuel boiler with a slag removal function, and relates to the technical field of biomass fuel smelting furnaces, the biomass fuel boiler comprises a boiler body, a double helix tube is arranged in the boiler body, a limiting column is arranged at the bottom of the boiler body, a baffle ring is arranged on the surface of the top of the limiting column, a movable bin sleeves the outer side of the limiting column, and the movable bin is clamped with the limiting column through the baffle ring; the cooler covers a pipeline, matched with the exhaust end of the double-spiral pipe, of the limiting column and the exhaust end of the double-spiral pipe, a connecting rod is arranged between the movable bin and the double-spiral pipe, the movable bin can rise under the influence of air pressure under external gas transmission equipment in the mode that the limiting column is connected with the movable bin, and meanwhile gas can be injected into the double-spiral pipe; when air flow rapidly passes through the double-spiral pipe, the temperature of the double-spiral pipe is rapidly reduced, the slag condensed on the surface of the double-spiral pipe is pre-cooled to accelerate condensation, so that the hardness of the slag is increased, the slag is embrittled, at the moment, the moving bin pushes the double-spiral pipe to deform through the connecting rod in the moving process, and the slag on the surface of the double-spiral pipe cracks and falls down during deformation.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass fuel furnaces, and particularly to a biomass fuel boiler with slag removal function. Background Art

[0002] Biomass fuel boilers use straw, crop waste, wood chips, etc. as raw materials, and the pellet fuels formed after compression and other treatments are mostly used for large-scale heating or daily household use.

[0003] During the long-term use process, the combustion of biomass will produce slag. The slag generally accumulates in the combustion chamber and the flue. Most of the slag in the flue is the particles in the smoke during the combustion process, with loose texture and relatively easy to clean. However, the slag in the combustion chamber is hard under the long-term high-temperature state, and the slag condensed on the surface of the grate for holding biomass fuel in the combustion chamber is particularly hard, which requires manual cleaning by operators. However, the space in the combustion chamber is small, and it is difficult for operators to manually clean the slag. Summary of the Invention

[0004] Aiming at the above problems, the purpose of the present invention is to provide a biomass fuel boiler with slag removal function, which solves the problem that a large amount of slag will condense on the surface of the furnace chamber during the combustion process of biomass in the combustion chamber, resulting in increased subsequent cleaning difficulty.

[0005] The technical solution of the present invention is as follows: A biomass fuel boiler with slag removal function includes a furnace body. A double helix tube is arranged inside the furnace body. Both ends of the double helix tube pass through the furnace body and extend to the outside respectively. The two ends of the double helix tube are respectively an air injection end and an exhaust end. A limiting column is arranged at the bottom of the furnace body. A retaining ring is arranged on the top surface of the limiting column. A moving chamber is sleeved outside the limiting column. The moving chamber is clamped with the limiting column through the retaining ring.

[0006] The limiting column is a tubular structure with a hollow interior and is connected to the moving chamber. Pipes extending to the outside of the furnace body and adapted to the two ends of the double helix tube are respectively arranged on both sides of the limiting column. The limiting column is connected to the air injection end of the double helix tube through the pipe and is externally connected to an air conveying device through the pipe. A cooler is arranged on the surface of the furnace body. The cooler covers the pipe of the limiting column adapted to the exhaust end of the double helix tube and the exhaust end.

[0007] A connecting rod is arranged between the moving chamber 5 and the double helix tube 2. A support plate 8 connected to the furnace body 1 is sleeved outside the connecting rod 7. The diameter of the support plate 8 and the double helix tube 2 form a waste area. A sleeve 9 close to the bottom of the support plate 8 is arranged on the surface of the connecting rod 7. A hammer 10 is hinged on the surface of the sleeve 9. A spring 11 is arranged between the hammer 10 and the sleeve 9. The spring 11 pushes the hammer 10 close to the support plate 8.

[0008] Further, guiding blocks are evenly distributed on the inner wall of the furnace body. A limiting groove adapted to the guiding blocks is provided on the surface of the moving bin. The moving bin is slidably and adaptively connected to the furnace body through the limiting groove and the guiding blocks, ensuring that the moving bin will not shift under normal and moving states.

[0009] Further, the moving bin has a circular cake-like structure with a hollow interior and an open bottom. The limiting column extends into the interior of the moving bin through the open bottom of the moving bin, and there is an airtight fit between the limiting column and the moving bin, ensuring that the moving bin can rise under the action of air pressure.

[0010] Further, there is a gap between the pipe bodies of the double spiral pipe along the spiral direction, ensuring that the ash and residue of the biomass contained in the double spiral pipe can naturally fall during the combustion process.

[0011] Further, the connecting rod is composed of a support rod and connecting rings at both ends of the support rod. The connecting ring located at the top of the support rod is sleeved outside the double spiral pipe, and the connecting ring located at the bottom of the support rod is connected to the moving bin through a hanging ear, enabling the connecting rod to have a margin of movement while connecting the moving bin and the double spiral pipe.

[0012] Further, the guiding block is flush with the retaining ring of the limiting column, and the height of the guiding block is greater than the height of the limiting column inside the moving bin, restricting the maximum movement path of the moving bin.

[0013] Further, a pipe clamp is provided between the outer pipe of the double spiral pipe and the furnace body to ensure the stable installation of the double spiral pipe.

[0014] Further, a perforation is provided at the center of the support plate. The connecting rod passes through the support plate through the perforation, and the diameter of the perforation is greater than the diameter of the connecting rod, preventing the connecting rod from being restricted by the support plate during movement.

[0015] Further, there are several striking hammers, and the several striking hammers are radially arranged on the surface of the sleeve. The length of the striking hammer is greater than the radius of the support plate, ensuring that the striking hammer can effectively strike the support plate to cause the support plate to vibrate.

[0016] Further, the striking hammer includes a hammer handle hinged to the sleeve and a hammer head at the end of the rod. One end of the spring is connected to the sleeve and the other end is connected to the hammer handle of the striking hammer. The spring always remains in a relaxed state to push the striking hammer.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention forms a grate in the furnace body through a double - helix tube to hold biomass fuel. At the same time, when the double - helix tube is affected by an external force, it will deform downward to form a conical holding area, which can hold more fuel. During the combustion process, the ashes can fall downward through the gaps between the tube bodies of the double - helix tube, ensuring that while the fuel is burning normally, more fuel can be held to obtain a higher combustion temperature and duration.

[0019] 2. The present invention enables the moving bin to rise under the influence of air pressure by the connection of the limiting column to the moving bin. At the same time, when the gas - conveying device injects gas into the limiting column, it also injects gas into the double - helix tube. When there is a rapid flow of air in the double - helix tube, its temperature drops rapidly, and the slag condensed on the surface of the double - helix tube is pre - cooled and accelerates condensation, thereby increasing its hardness and embrittlement. At this time, during the movement of the moving bin, the double - helix tube is deformed by the connecting rod. The slag on the surface of the double - helix tube breaks and falls downward during the deformation. The operator only needs to uniformly clean up the ashes and slag that fall on the surface of the pallet.

[0020] 3. The present invention forms a holding area for ash impurities through the pallet outside the connecting rod. At the same time, when the connecting rod moves, it drives the hammers arranged on its surface to shake. The shaking hammers strike the pallet, preventing the slag that falls on the surface of the pallet from being softened by the warm ashes and adhering to the surface of the pallet, and ensuring that the ashes deposited on the surface of the pallet are loosened, which is convenient for the operator to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic cross - sectional view of the overall structure of the present invention;

[0022] Figure 2 is a schematic view of the internal structure of the furnace body of the present invention;

[0023] Figure 3 is a schematic view of the position of the limiting column structure of the present invention;

[0024] Figure 4 is a schematic cross - sectional view of the moving bin structure of the present invention;

[0025] Figure 5 is a schematic view of the connection state between the double - helix tube and the moving bin of the present invention;

[0026] Figure 6 is a schematic view of the pallet structure of the present invention.

[0027] Reference numerals: 1. Furnace body; 2. Double - helix tube; 3. Limiting column; 4. Retaining ring; 5. Moving bin; 6. Cooler; 7. Connecting rod; 8. Pallet; 9. Sleeve; 10. Hammer; 11. Spring; 101. Guide block; 102. Limiting groove. DETAILED DESCRIPTION OF THE INVENTION

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] As Figures 1-4 shown, a biomass fuel boiler with slag removal function includes a furnace body 1. A double spiral tube 2 is arranged inside the furnace body 1. A pipe clamp is arranged between the outer tube of the double spiral tube 2 and the furnace body 1 to ensure the stable installation of the double spiral tube 2. Both ends of the double spiral tube 2 respectively pass through the furnace body 1 and extend to the outside. The two ends of the double spiral tube 2 are respectively an air injection end and an exhaust end. There is a gap between the tube bodies of the double spiral tube 2 along the spiral direction to ensure that the ash and residue of the biomass contained in the double spiral tube 2 can naturally fall during the combustion process. A limiting column 3 is arranged at the bottom of the furnace body 1. A retaining ring 4 is arranged on the top surface of the limiting column 3. A moving bin 5 is sleeved outside the limiting column 3. Guide blocks 101 are evenly distributed on the inner wall of the furnace body 1. Limiting grooves 102 adapted to the guide blocks 101 are arranged on the surface of the moving bin 5. The moving bin 5 is slidably adapted to the furnace body 1 through the limiting grooves 102 and the guide blocks 101 and is clamped to ensure that the moving bin 5 does not shift in the normal state and the moving state. The guide blocks 101 are flush with the retaining ring 4 of the limiting column 3. The height of the guide blocks 101 is greater than the height of the limiting column 3 inside the moving bin 5 to limit the maximum moving path of the moving bin 5;

[0030] The moving bin 5 is a circular cake-like structure with a hollow interior and an open bottom. The limiting column 3 extends into the moving bin 5 through the open bottom of the moving bin 5. The limiting column 3 and the moving bin 5 are airtight to ensure that the moving bin 5 can rise under the action of air pressure. The moving bin 5 is clamped to the limiting column 3 through the retaining ring 4;

[0031] The limiting column 3 is a tubular structure with a hollow interior and communicating with the moving bin 5. Pipes extending to the outside of the furnace body 1 and adapted to the two ends of the double spiral tube 2 are respectively arranged on both sides of the limiting column 3. The limiting column 3 is communicated with the air injection end of the double spiral tube 2 through the pipe and is externally connected to a gas transmission device through the pipe. A cooler 6 is arranged on the surface of the furnace body 1. The cooler 6 covers the pipe of the limiting column 3 adapted to the exhaust end of the double spiral tube 2 and the exhaust end;

[0032] A connecting rod 7 is arranged between the moving bin 5 and the double helix tube 2. The connecting rod 7 is composed of a support rod and connecting rings at both ends of the support rod. The connecting ring located at the top of the support rod is sleeved outside the double helix tube 2, and the connecting ring located at the bottom of the support rod is connected to the moving bin 5 through a hanging ear, so that the connecting rod 7 has a margin for movement while connecting the moving bin 5 and the double helix tube 2. A support plate 8 connected to the furnace body 1 is sleeved outside the connecting rod 7. A perforation is provided at the central position of the support plate 8. The connecting rod 7 passes through the support plate 8 through the perforation. The diameter of the perforation is larger than the diameter of the connecting rod 7. The diameter of the support plate 8 and the double helix tube 2 form a waste area. A sleeve 9 close to the bottom of the support plate 8 is arranged on the surface of the connecting rod 7. A hammer 10 is hinged on the surface of the sleeve 9. There are several hammers 10, and several hammers 10 are radially arranged on the surface of the sleeve 9. The length of the hammer 10 is greater than the radius of the support plate 8. A spring 11 is arranged between the hammer 10 and the sleeve 9. The spring 11 pushes the hammer 10 close to the support plate 8. The hammer 10 includes a hammer handle hinged to the sleeve 9 and a hammer head at the end of the rod. One end of the spring 11 is connected to the sleeve 9 and the other end is connected to the hammer handle of the hammer 10. The spring 11 always maintains a relaxed state to push the hammer 10.

[0033] Working principle of the present invention:

[0034] When the present invention is in use, fuel is placed on the surface of the double helix tube 2, and the fuel burns on the top of the double helix tube 2. The ashes and residues generated during combustion will pass through the double helix tube 2 and fall downward;

[0035] When slag needs to be removed after long-term use, the operator intermittently supplies gas to the double helix tube 2 and the limiting column 3 through an external gas supply device. When the gas passes through the double helix tube 2, the double helix tube 2 is cooled, and the slag condensed on the surface of the double helix tube 2 will follow the cooling and condense, harden and embrittle. At the same time, the gas enters the limiting column 3. The limiting column 3 is communicated with the moving bin 5, and the air pressure in the limiting column 3 and the moving bin 5 increases. The pressure pushes the moving bin 5 to move upward. During the movement, the connecting rod 7 is pushed. The connecting rod 7 moves upward to push the double helix tube 2, and the double helix tube 2 is pushed to deform. The slag condensed on the surface of the deformed double helix tube 2 cannot follow the deformation and breaks, and the broken slag falls downward;

[0036] The slag and ashes falling downward fall on the surface of the support plate 8. At this time, the moving connecting rod 7 drives the hammer 10 through the sleeve 9. The hammer 10 repeatedly contacts the support plate 8 to make the support plate 8 vibrate. At this time, the slag returns to softness under the action of the residual temperature of the ashes. Under the action of the vibration, it repeatedly shakes in the ashes, cannot contact the support plate 8 for a long time to avoid adhesion to the support plate 8, and can make the ashes wrap the slag, which is convenient for the transportation after the slag is cleaned.

[0037] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A biomass fuel boiler with slag removal function, comprising a furnace body (1), characterized in that: Inside the furnace body (1), a double - spiral tube (2) is provided. Both ends of the double - spiral tube (2) pass through the furnace body (1) and extend to the outside. The two ends of the double - spiral tube (2) are respectively an air - injection end and an exhaust end. At the bottom of the furnace body (1), a limiting column (3) is provided. On the top surface of the limiting column (3), a retaining ring (4) is provided. A moving chamber (5) is sleeved outside the limiting column (3), and the moving chamber (5) is clamped with the limiting column (3) through the retaining ring (4). The limiting column (3) is a tubular structure with a hollow interior and is connected to the moving chamber (5). On both sides of the limiting column (3), pipes extending outside the furnace body (1) and adapted to the two ends of the double - spiral tube (2) are provided. The limiting column (3) is connected to the air - injection end of the double - spiral tube (2) through the pipe and is externally connected to a gas - transmission device through the pipe. On the surface of the furnace body (1), a cooler (6) is provided. The cooler (6) covers the pipe of the limiting column (3) adapted to the exhaust end of the double - spiral tube (2) and the exhaust end. A connecting rod (7) is provided between the moving chamber (5) and the double - spiral tube (2). A support plate (8) connected to the furnace body (1) is sleeved outside the connecting rod (7). The support plate (8) and the diameter of the double - spiral tube (2) form a waste area. On the surface of the connecting rod (7), a sleeve (9) near the bottom of the support plate (8) is provided. A hammer (10) is hinged on the surface of the sleeve (9). A spring (11) is provided between the hammer (10) and the sleeve (9), and the spring (11) pushes the hammer (10) close to the support plate (8).

2. A biomass fuel boiler with slag removal function according to claim 1, characterized in that: Guide blocks (101) are evenly distributed on the inner wall of the furnace body (1). On the surface of the moving chamber (5), limiting grooves (102) adapted to the guide blocks (101) are provided. The moving chamber (5) is slidably adapted to the guide blocks (101) through the limiting grooves (102) and is clamped to the furnace body (1).

3. A biomass fuel boiler with slag removal function according to claim 1, characterized in that: The moving chamber (5) is a circular cake - like structure with a hollow interior and an open bottom. The limiting column (3) extends into the moving chamber (5) through the open bottom of the moving chamber (5), and an air - tight fit is formed between the limiting column (3) and the moving chamber (5).

4. A biomass fuel boiler with a slag removal function according to claim 1, characterized in that: There is a gap between the tube bodies of the double - spiral tube (2) along the spiral direction.

5. The biomass fuel boiler with slag removal function according to claim 1, characterized in that: The connecting rod (7) is composed of a support rod and connecting rings at both ends of the support rod. The connecting ring at the top of the support rod is sleeved outside the double - spiral tube (2), and the connecting ring at the bottom of the support rod is connected to the moving chamber (5) through a hanging ear.

6. A biomass fuel boiler with a slag removal function according to claim 2, characterized in that: The guide blocks (101) are flush with the retaining ring (4) of the limiting column (3), and the height of the guide blocks (101) is greater than the height of the limiting column (3) inside the moving chamber (5).

7. A biomass fuel boiler with slag removal function according to claim 1, characterized in that: A pipe clamp is provided between the outer tube of the double - spiral tube (2) and the furnace body (1).

8. A biomass fuel boiler with slag removal function according to claim 1, characterized in that: A perforation is provided at the central position of the support plate (8). The connecting rod (7) passes through the support plate (8) through the perforation, and the diameter of the perforation is greater than the diameter of the connecting rod (7).

9. The biomass fuel boiler with slag removal function according to claim 1, characterized in that: There are several hammers (10), and the several hammers (10) are radially arranged on the surface of the sleeve (9). The length of the hammer (10) is greater than the radius of the support plate (8).

10. A biomass fuel boiler with a slag removal function according to claim 1, characterized in that: The striker (10) includes a hammer handle hinged to the sleeve (9) and a hammer head at the end of the rod. One end of the spring (11) is connected to the sleeve (9) and the other end is connected to the hammer handle of the striker (10). The spring (11) always remains in a relaxed state to push the striker (10).

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