A combustion boiler suitable for biomass pellet fuel

Abstract

The application discloses a biomass pellet fuel combustion boiler and relates to the field of combustion boiler structures.The biomass pellet fuel combustion boiler comprises a boiler box body, an operation panel is installed on the outer side wall of the boiler box body, a feeding port is installed on the top side of the boiler box body, a partition plate is installed on the inner side wall of the boiler box body and divides the inner cavity of the boiler box body into a fuel cabin and a heating cabin.Treatment of the biomass pellet fuel by a crushing unit after the biomass pellet fuel enters a crushing cabin makes the caked fuel separated into granular fuel, which is convenient for fuel combustion.The granular fuel enters a feeding plate through a feeding pipe.In the moving process of the granular fuel on the feeding plate, a fan inhales part of the heat in the heating cabin, conveys the heat into a heat-conducting pipe and releases the heat, the bottom side of the feeding plate is used for drying the granular fuel, the moisture of the granular fuel is reduced, the fuel entering a combustion cabin is in a dry granular state, the fuel combustion is facilitated, a large amount of black smoke is avoided, and the environment is protected.

Description

Technical Field

[0001] This invention relates to the field of combustion boiler structures, and in particular to a combustion boiler suitable for biomass pellet fuel. Background Technology

[0002] A biomass combustion boiler is a type of boiler that uses biomass as fuel. It has a powerful conversion system. Compared with traditional mineral energy fuels, biomass fuel has a very different composition and combustion characteristics. The chemical composition of biomass fuel is a very complex polymer. In engineering applications as fuel, biomass fuel has a low ignition point, is easy to ignite, and has much lower ash, nitrogen, and sulfur content than coal. It has a low sulfur content and burns cleanly and without pollution, making it suitable for boilers, greenhouse heating, large-area heating, and small and medium-sized restaurants.

[0003] In the prior art, in order to facilitate transportation and use, and to prevent biomass pellets from breaking apart and to maintain a certain shape, biomass fuel generally has a high water content, which makes it easy to clump together. At the same time, during combustion, the center of the fuel is difficult to contact with air, which easily leads to incomplete combustion of fuel. The exhaust gas contains a large number of smoke particles, forming a large amount of black smoke, resulting in fuel waste and environmental pollution. Therefore, we disclose a combustion boiler suitable for biomass pellet fuel to meet people's needs. Summary of the Invention

[0004] The purpose of this application is to provide a combustion boiler suitable for biomass pellet fuel, in order to solve the problems mentioned in the background art, which are that in order to facilitate transportation and use and to prevent biomass pellets from loosening and to maintain a certain shape, biomass fuel generally has a high water content and is prone to agglomeration into large lumps. At the same time, during combustion, the central part of the fuel is difficult to contact with air, which easily leads to incomplete combustion of fuel, and the emission gas contains a large amount of smoke particles, forming a large amount of black smoke, resulting in fuel waste and environmental pollution.

[0005] To achieve the above objectives, this application provides the following technical solution: A combustion boiler suitable for biomass pellet fuel, comprising a boiler housing, an operation panel installed on the outer wall of the boiler housing, a feed inlet installed on the top side of the boiler housing, a partition installed on the inner wall of the boiler housing dividing the inner cavity of the boiler housing into a fuel compartment and a heating compartment, a crushing compartment installed near the top side of the fuel compartment via a bracket, a crushing unit rotatably installed in the crushing compartment, the top side of the crushing compartment communicating with the feed inlet, a discharge pipe installed on the bottom side of the crushing compartment, and a sliding unit located near the bottom side of the fuel compartment. A conveyor plate is slidably installed, with guard plates on both sides forming a U-shaped structure. A combustion chamber is installed on the bottom inner wall of the fuel tank, with one end of the combustion chamber extending to one side of the heating chamber. The conveyor plate is at a certain angle to the horizontal direction, and the top side of the higher end of the conveyor plate corresponds to the bottom end of the feed pipe, while the bottom side of the lower end of the conveyor plate corresponds to the top side of the combustion chamber. A fan is installed on the partition plate on one side of the fuel tank, with one end of the fan connected to the heating chamber and the other end equipped with a heat-conducting pipe that matches the bottom side of the conveyor plate.

[0006] Based on the above mechanism, the boiler operation is controlled via the control panel, and biomass pellet fuel is added to the boiler box through the feed inlet. After entering the crushing chamber, the biomass pellet fuel is crushed by the crushing unit, separating the clumped fuel into pellets for easier combustion. The pellet fuel enters the conveying plate through the feed pipe. The conveying plate moves back and forth in a straight line under the action of the sliding unit, forming an oscillation, so that the pellet fuel falling on the conveying plate is in a flat state. With continuous oscillation, the pellet fuel moves from the higher side of the conveying plate to the lower side and enters the combustion chamber, releasing heat to one side of the heating chamber. After combustion has been going on for a period of time, during the movement of the pellet fuel on the conveying plate, the fan draws in some of the heat from the heating chamber, which is then transported to the heat conduction pipe and released. The pellet fuel is dried from the bottom side of the conveying plate, reducing moisture and ensuring that the fuel entering the combustion chamber is dry pellets, which is conducive to complete combustion, avoids the production of a large amount of black smoke, and is beneficial to environmental protection.

[0007] Preferably, the crushing unit includes a rotating column, on which multiple straight rods are evenly installed, and cutting blades are installed on each of the multiple straight rods. A first motor is installed on the wall of the fuel tank, and one end of the rotating column is fixedly connected to the output shaft of the first motor.

[0008] Furthermore, by setting up a rotating column, the first motor drives the rotating column to rotate, and multiple straight rods collide and knock on the agglomerated fuel during rotation, causing the agglomerated fuel to break up quickly. The setting of the cutting blade makes the agglomerated fuel easier to break up, improving the breaking effect.

[0009] Preferably, the crushing chamber is at a certain angle to the horizontal direction, and the feed inlet is located on the higher side of the crushing chamber, the discharge pipe is located on the lower side of the crushing chamber, one end of the rotating column is equipped with a conveying screw, and the discharge pipe is positioned corresponding to the conveying screw.

[0010] Furthermore, by setting the crushing chamber at a certain angle to the horizontal direction, it is convenient for the fuel to slide from one end of the crushing chamber to the other end. At the same time, the conveying screw and the rotating column rotate synchronously to form a spiral push on the fuel, which facilitates the fuel to move to one side of the feed pipe.

[0011] Preferably, the sliding unit includes multiple sliding rods, which are symmetrically installed on both sides of the conveying plate. Multiple sliding sleeves are installed on the bottom inner wall of the fuel tank via support columns. The sliding rods slide and match with the corresponding sliding sleeves. Each of the multiple sliding rods is equipped with a buffer unit, and a drive unit is installed on one side of the guard plate.

[0012] Furthermore, by setting up a sliding rod, the sliding rod slides along the sliding sleeve, allowing the conveying plate to slide left and right under the action of the drive unit, forming an oscillation, which facilitates fuel movement.

[0013] Preferably, the drive unit includes a second motor, which is mounted on the inner wall of the fuel tank. An extension block is mounted on one side of the guard plate, and a first connecting rod is rotatably mounted on one side of the extension block via a first rotating shaft. A second connecting rod is rotatably mounted on one end of the first connecting rod via a second rotating shaft, and one side of the second connecting rod is fixedly connected to the output shaft of the second motor.

[0014] Furthermore, by setting up a second motor, the first connecting rod, the second connecting rod, and the guard plate form a linkage mechanism. The second motor drives the second connecting rod to rotate, causing the guard plate and the conveyor plate to reciprocate in a straight line, thus forming an oscillation.

[0015] Preferably, the buffer unit includes a spring, which is sleeved on the corresponding sliding rod. One end of the spring is connected to one side of the sliding sleeve, and the other end is connected to one side of the extension block.

[0016] Furthermore, the spring mechanism provides a buffering effect during the left-right sliding motion of the feed plate.

[0017] Preferably, the conveyor plate has a corrugated structure and multiple ventilation holes are provided on the conveyor plate.

[0018] Furthermore, the wave-shaped structure increases the resistance when the fuel slides, prolongs the residence time of the fuel on the conveyor plate, and prevents the fuel from sliding directly and quickly to the bottom and accumulating. The vent holes facilitate the air permeability of the conveyor plate and make it easier to dry the fuel.

[0019] Preferably, a receiving plate is installed at the bottom end of the protective plate, the receiving plate is located on the bottom side of the conveying plate, and the length of the receiving plate is greater than the length of the conveying plate. The heat-conducting pipe is located between the conveying plate and the receiving plate, and multiple air outlet pipes are installed on the heat-conducting pipe.

[0020] Furthermore, the receiving plate can collect some of the fuel that falls through the vent holes, thus serving a collection function. The heat pipe outputs heat from the bottom side of the conveying plate to dry the fuel located on the conveying plate.

[0021] Preferably, multiple clearance openings are provided on the outer side walls of the multiple air outlet pipes to form air outlets, and a cover plate is installed on the end of the multiple air outlet pipes away from the heat conduction pipe.

[0022] Furthermore, by setting up the clearance opening and installing the cover plate, the air outlet pipe can maintain an air outlet to dissipate heat. The cover plate can prevent fuel particles from entering the heat conduction pipe and prevent the heat conduction pipe from becoming blocked.

[0023] Preferably, the cover plate has an arc-shaped structure.

[0024] Furthermore, the arc-shaped structure makes it difficult for fuel to accumulate on one side of the cover, allowing fuel to slide directly off the cover surface.

[0025] In summary, the technical effects and advantages of this invention are as follows:

[0026] 1. In this invention, after the biomass pellet fuel enters the crushing chamber, it is crushed by the crushing unit to separate the agglomerated fuel into pellets, making it easier to burn. The pellet fuel enters the conveying plate through the feeding pipe. During the movement of the pellet fuel on the conveying plate, the fan draws in some of the heat from the heating chamber, which is then transported to the heat conduction pipe and released. The pellet fuel is dried from the bottom side of the conveying plate to reduce moisture, so that the fuel entering the combustion chamber is dry pellets, which is conducive to complete combustion of the fuel, avoids the generation of a large amount of black smoke, and is beneficial to environmental protection.

[0027] 2. In this invention, by setting up a rotating column, the first motor drives the rotating column to rotate, and multiple straight rods collide and knock on the agglomerated fuel when rotating, so that the agglomerated fuel is quickly broken up. The setting of the cutting blade makes the agglomerated fuel easier to break up and improves the crushing effect. By setting the crushing chamber at a certain angle to the horizontal direction, it is easy for the fuel to slide from one end of the crushing chamber to the other end. At the same time, the conveying screw and the rotating column rotate synchronously to form a spiral push on the fuel, which makes it easy for the fuel to move to one side of the feed pipe.

[0028] 3. In this invention, the wave-shaped structure increases the resistance when the fuel slides, prolongs the residence time of the fuel on the conveying plate, and prevents the fuel from sliding directly and quickly to the bottom and accumulating. The ventilation holes facilitate the air permeability of the conveying plate and make it easier to dry the fuel. The receiving plate can receive some of the fuel that falls through the ventilation holes, thus playing a collection role. The heat pipe outputs heat from the bottom side of the conveying plate to dry the fuel on the conveying plate. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0032] Figure 3 This is a partial three-dimensional structural diagram of the crushing unit region in this invention;

[0033] Figure 4 This is a schematic diagram of a partial three-dimensional structure of the protective plate area in this invention;

[0034] Figure 5 This is a schematic diagram of a partial three-dimensional structure of the driving unit region in this invention;

[0035] Figure 6 This is a schematic diagram of a partial cross-sectional structure of the heat pipe region in this invention.

[0036] In the diagram: 1. Boiler housing; 2. Control panel; 3. Feed inlet; 4. Crushing chamber; 5. First motor; 6. Partition plate; 7. Straight rod; 8. Conveying screw; 9. Feed pipe; 10. Protective plate; 11. Conveying plate; 12. Combustion chamber; 13. Support column; 14. Fan; 15. Heat pipe; 16. Receiving plate; 17. Rotating column; 18. Cutting blade; 19. Sliding rod; 20. Sliding sleeve; 21. Spring; 22. Extension block; 23. Second motor; 24. Second connecting rod; 25. Second rotating shaft; 26. First rotating shaft; 27. First connecting rod; 28. Vent hole; 29. ​​Air outlet pipe; 30. Cover plate; 31. Circumvention opening. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] It should also be noted that all standard parts used in this application are commercially available, and can be custom-made according to the description and drawings. Unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances, and unless explicitly limited, machinery, parts, and equipment can all adopt conventional models in the prior art.

[0040] In this document, the term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Example: Reference Figure 1-6The boiler shown is suitable for biomass pellet fuel combustion and includes a boiler body 1. An operation panel 2 is installed on the outer wall of the boiler body 1. A feed inlet 3 is installed on the top side of the boiler body 1. A partition 6 is installed on the inner wall of the boiler body 1, dividing the inner cavity of the boiler body 1 into a fuel compartment and a heating compartment. A crushing compartment 4 is installed near the top of the fuel compartment via a bracket. A crushing unit is rotatably installed inside the crushing compartment 4. The top of the crushing compartment 4 is connected to the feed inlet 3. A discharge pipe 9 is installed on the bottom side of the crushing compartment 4. A conveying plate 11 is slidably installed near the bottom of the fuel compartment via a sliding unit. The conveying plate 11, discharge pipe 9, crushing unit, crushing compartment 4, operation panel 2, and boiler body 1 can be existing... In any of the technologies, protective plates 10 are installed on both sides of the conveying plate 11 to form a U-shaped structure. A combustion chamber 12 is installed on the bottom inner wall of the fuel tank. One end of the combustion chamber 12 extends to one side of the heating chamber. The conveying plate 11 is at a certain angle to the horizontal direction. The top side of the higher end of the conveying plate 11 corresponds to the bottom end of the feed pipe 9. The bottom side of the lower end of the conveying plate 11 corresponds to the top side of the combustion chamber 12. A fan 14 is installed on the partition 6 on one side of the fuel tank. One end of the fan 14 is connected to the heating chamber, and the other end is equipped with a heat conduction pipe 15. The heat conduction pipe 15, the fan 14, and the combustion chamber 12 can be any of the prior art. The heat conduction pipe 15 is matched with the bottom side of the conveying plate 11.

[0042] Based on the above mechanism, the boiler operation is controlled by the operation panel 2, and biomass pellet fuel is added to the boiler box 1 through the feed inlet 3. After entering the crushing chamber 4, the biomass pellet fuel is crushed by the crushing unit, separating the clumped fuel into pellets for easier combustion. The pellet fuel enters the conveying plate 11 through the feed pipe 9. The conveying plate 11 moves back and forth in a straight line under the action of the sliding unit, forming an oscillation, so that the pellet fuel falling on the conveying plate 11 is in a flat state. With continuous oscillation, the pellet fuel moves from the higher side to the lower side of the conveying plate 11 and enters the combustion chamber 12, releasing heat to one side of the heating chamber. After combustion has been going on for a period of time, during the movement of the pellet fuel on the conveying plate 11, the fan 14 draws in some of the heat from the heating chamber, which is then transported to the heat conduction pipe 15 and released. The pellet fuel is dried from the bottom side of the conveying plate 11, reducing moisture, so that the fuel entering the combustion chamber 12 is dry pellets, which is conducive to complete combustion of fuel, avoids the generation of a large amount of black smoke, and is beneficial to environmental protection.

[0043] like Figure 2 and 3As shown, the crushing unit includes a rotating column 17, on which multiple straight rods 7 are evenly installed. Each of the multiple straight rods 7 is equipped with a cutting blade 18. A first motor 5 is installed on the wall of the fuel tank. The first motor 5, the cutting blade 18, the straight rods 7, and the rotating column 17 can be any of the existing technologies. One end of the rotating column 17 is fixedly connected to the output shaft of the first motor 5. Through the setting of the rotating column 17, the first motor 5 drives the rotating column 17 to rotate. When the multiple straight rods 7 rotate, they collide and knock on the agglomerated fuel, causing the agglomerated fuel to break up quickly. The setting of the cutting blade 18 makes the agglomerated fuel easier to break up, improving the crushing effect.

[0044] like Figure 2 As shown, the crushing chamber 4 is at a certain angle to the horizontal direction, and the feed inlet 3 is located on the higher side of the crushing chamber 4, while the discharge pipe 9 is located on the lower side of the crushing chamber 4. A conveying screw 8 is installed at one end of the rotating column 17. The conveying screw 8 can be any of the existing technologies. The discharge pipe 9 is positioned corresponding to the conveying screw 8. By setting the crushing chamber 4 at a certain angle to the horizontal direction, it is convenient for the fuel to slide from one end of the crushing chamber 4 to the other end. At the same time, the conveying screw 8 and the rotating column 17 rotate synchronously, forming a spiral push on the fuel, which facilitates the fuel to move to one side of the discharge pipe 9.

[0045] like Figure 4 As shown, the sliding unit includes multiple sliding rods 19, which are symmetrically installed on both sides of the conveying plate 11. Multiple sliding sleeves 20 are installed on the bottom inner wall of the fuel tank via support columns 13. The sliding rods 19 slide and match with the corresponding sliding sleeves 20. Each of the multiple sliding rods 19 is equipped with a buffer unit. A drive unit is installed on one side of the guard plate 10. The drive unit, buffer unit, sliding sleeves 20, and sliding rods 19 can be any of the prior art. By setting the sliding rods 19, the sliding rods 19 slide along the sliding sleeves 20, so that the conveying plate 11 can slide left and right under the action of the drive unit, forming a swing, which facilitates the movement of fuel.

[0046] like Figure 4 and 5 As shown, the drive unit includes a second motor 23, which is mounted on the inner wall of the fuel tank. An extension block 22 is mounted on one side of the guard plate 10. A first connecting rod 27 is rotatably mounted on one side of the extension block 22 via a first rotating shaft 26. A second connecting rod 24 is rotatably mounted on one end of the first connecting rod 27 via a second rotating shaft 25. The second connecting rod 24, the first connecting rod 27, the extension block 22, and the second motor 23 can be any of the prior art. One side of the second connecting rod 24 is fixedly connected to the output shaft of the second motor 23. Through the arrangement of the second motor 23, the first connecting rod 27, the second connecting rod 24, and the guard plate 10 form a linkage mechanism. The second motor 23 drives the second connecting rod 24 to rotate, causing the guard plate 10 and the conveyor plate 11 to form a linear reciprocating motion, thus creating an oscillation.

[0047] like Figure 4 As shown, the buffer unit includes a spring 21, which can be any type of existing technology. The spring 21 is sleeved on the corresponding sliding rod 19. One end of the spring 21 is connected to one side of the sliding sleeve 20, and the other end is connected to one side of the extension block 22. Through the setting of the spring 21, the elastic force of the spring 21 plays a certain buffering role during the left and right sliding of the conveyor plate 11.

[0048] like Figure 6 As shown, the conveying plate 11 has a corrugated structure and multiple ventilation holes 28 are provided on the conveying plate 11. The corrugated structure can increase the resistance when the fuel slides, prolong the residence time of the fuel on the conveying plate 11, and prevent the fuel from sliding directly and quickly to the bottom and forming an accumulation. The ventilation holes 28 facilitate the ventilation of the conveying plate 11 and make it easier to dry the fuel.

[0049] like Figure 2 and 6 As shown, a receiving plate 16 is installed at the bottom of the protective plate 10. The receiving plate 16 is located on the bottom side of the conveying plate 11, and the length of the receiving plate 16 is greater than the length of the conveying plate 11. The heat-conducting pipe 15 is located between the conveying plate 11 and the receiving plate 16. Multiple air outlet pipes 29 are installed on the heat-conducting pipe 15. The receiving plate 16 and the air outlet pipes 29 can be any of the prior art. Through the setting of the receiving plate 16, the receiving plate 16 can receive part of the fuel that falls through the vent hole 28, and play a collection role. The heat-conducting pipe 15 outputs heat from the bottom side of the conveying plate 11 to dry the fuel located on the conveying plate 11.

[0050] like Figure 6 As shown, multiple clearance openings 31 are provided on the outer side walls of multiple air outlet pipes 29 to form air outlets. A cover plate 30 is installed on the end of each air outlet pipe 29 away from the heat conduction pipe 15. The cover plate 30 can be any of the prior art. By setting the clearance openings 31, after installing the cover plate 30, the air outlet pipe 29 can maintain an air outlet to dissipate heat. The cover plate 30 can prevent fuel particles from entering the heat conduction pipe 15 and prevent the heat conduction pipe 15 from becoming blocked.

[0051] like Figure 6 As shown, the cover plate 30 has an arc-shaped structure. The arc-shaped structure makes it difficult for fuel to be stored on one side of the cover plate 30, and the fuel will slide off directly when it falls on the surface of the cover plate 30.

[0052] Working principle of this invention:

[0053] The boiler is controlled via the control panel 2, and biomass pellet fuel is added to the boiler housing 1 through the feed inlet 3. After entering the crushing chamber 4, the biomass pellet fuel is crushed by the crushing unit, separating the clumped fuel into pellets for easier combustion. The pellet fuel enters the conveying plate 11 through the feed pipe 9. The conveying plate 11 moves back and forth in a straight line under the action of the sliding unit, forming an oscillation, so that the pellet fuel falling on the conveying plate 11 is in a flat state. With continuous oscillation, the pellet fuel moves from the higher side to the lower side of the conveying plate 11 and enters the combustion chamber 12, releasing heat to one side of the heating chamber. After combustion has been going on for a period of time, during the movement of the pellet fuel on the conveying plate 11, the fan 14 draws in some of the heat from the heating chamber, which is then transported to the heat conduction pipe 15 and released. The pellet fuel is dried from the bottom side of the conveying plate 11, reducing moisture, so that the fuel entering the combustion chamber 12 is dry pellets, which is conducive to complete combustion of fuel, avoids the production of a large amount of black smoke, and is environmentally friendly.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A combustion boiler suitable for biomass pellet fuel, comprising a boiler housing (1), characterized in that: An operation panel (2) is installed on the outer wall of the boiler box (1). A feed inlet (3) is installed on the top side of the boiler box (1). A partition (6) is installed on the inner wall of the boiler box (1) and divides the inner cavity of the boiler box (1) into a fuel compartment and a heating compartment. A crushing compartment (4) is installed near the top of the fuel compartment via a bracket. A crushing unit is rotatably installed in the crushing compartment (4). The top of the crushing compartment (4) is connected to the feed inlet (3). A discharge pipe (9) is installed on the bottom side of the crushing compartment (4). A conveying plate (11) is slidably installed near the bottom of the fuel compartment via a sliding unit. Guard plates (10) are installed on both sides of the conveying plate (11). The fuel tank is arranged in a U-shape. A combustion chamber (12) is installed on the inner wall of the bottom side of the fuel tank. One end of the combustion chamber (12) extends to one side of the heating chamber. The conveying plate (11) is at a certain angle to the horizontal direction. The top side of the higher end of the conveying plate (11) corresponds to the bottom end of the feed pipe (9). The bottom side of the lower end of the conveying plate (11) corresponds to the top side of the combustion chamber (12). A fan (14) is installed on the partition plate (6) on one side of the fuel tank. One end of the fan (14) is connected to the heating chamber. A heat-conducting pipe (15) is installed on the other end. The heat-conducting pipe (15) matches the bottom side of the conveying plate (11). The crushing unit includes a rotating column (17), and multiple straight rods (7) are evenly installed on the outer side wall of the rotating column (17). Cutting blades (18) are installed on each of the multiple straight rods (7). A first motor (5) is installed on the wall of the fuel tank. One end of the rotating column (17) is fixedly connected to the output shaft of the first motor (5). The crushing chamber (4) is at a certain angle to the horizontal direction, and the feed inlet (3) is located on the higher side of the crushing chamber (4), the discharge pipe (9) is located on the lower side of the crushing chamber (4), and a conveying screw (8) is installed at one end of the rotating column (17), and the discharge pipe (9) is located corresponding to the position of the conveying screw (8). The sliding unit includes multiple sliding rods (19), which are symmetrically installed on both sides of the conveying plate (11). Multiple sliding sleeves (20) are installed on the bottom inner wall of the fuel tank via support columns (13). The sliding rods (19) slide and match with the corresponding sliding sleeves (20). Each of the multiple sliding rods (19) is equipped with a buffer unit. A drive unit is installed on one side of the guard plate (10). The drive unit includes a second motor (23), which is mounted on the inner wall of the fuel tank. An extension block (22) is mounted on one side of the guard plate (10). A first connecting rod (27) is rotatably mounted on one side of the extension block (22) via a first rotating shaft (26). A second connecting rod (24) is rotatably mounted on one end of the first connecting rod (27) via a second rotating shaft (25). One side of the second connecting rod (24) is fixedly connected to the output shaft of the second motor (23).

2. A combustion boiler suitable for biomass pellet fuel according to claim 1, characterized in that: The buffer unit includes a spring (21), which is sleeved on the corresponding sliding rod (19). One end of the spring (21) is connected to one side of the sliding sleeve (20), and the other end is connected to one side of the extension block (22).

3. A combustion boiler suitable for biomass pellet fuel according to claim 1, characterized in that: The conveying plate (11) has a wavy structure and multiple ventilation holes (28) are provided on the conveying plate (11).

4. A combustion boiler suitable for biomass pellet fuel according to claim 1, characterized in that: A receiving plate (16) is installed at the bottom end of the guard plate (10). The receiving plate (16) is located on the bottom side of the conveying plate (11), and the length of the receiving plate (16) is greater than the length of the conveying plate (11). The heat-conducting pipe (15) is located between the conveying plate (11) and the receiving plate (16). Multiple air outlet pipes (29) are installed on the heat-conducting pipe (15).

5. A combustion boiler suitable for biomass pellet fuel according to claim 4, characterized in that: Multiple clearance openings (31) are provided on the outer side walls of the multiple air outlet pipes (29) to form air outlets, and a cover plate (30) is installed on the end of the multiple air outlet pipes (29) away from the heat conduction pipe (15).

6. A combustion boiler suitable for biomass pellet fuel according to claim 5, characterized in that: The cover plate (30) has an arc-shaped structure.

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