Biomass pellet fuel furnace

Abstract

The utility model provides a biomass pellet fuel furnace which comprises a furnace barrel and a feeding device, the lower end of the furnace barrel is communicated with a furnace box, a primary air distribution chamber and a combustion chamber are arranged in the furnace box, the feeding device comprises a first feeding pipe and a second feeding pipe, one end of the first feeding pipe is provided with a first motor, and the other end of the first feeding pipe is communicated with the combustion chamber. A second motor is installed at one end of the second feeding pipe, the other end of the second feeding pipe is communicated with the first feeding pipe, a furnace ring is arranged at the upper end of the furnace barrel, secondary air distribution holes are formed in the surface of the furnace ring, a secondary air distribution chamber is formed between the periphery of the furnace ring and the inner wall of the furnace barrel in a surrounding mode, and an air supplementing pipe is further connected between the secondary air distribution chamber and the first feeding pipe. By the adoption of the technical scheme, air flow also enters the first feeding pipe through the ventilation holes and then flows in the axial direction of the first auger, oxygen is directly supplied into the combustion chamber, sufficient combustion of fuel is promoted, and the fuel and soot are prevented from returning to the first feeding pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of stoves, in particular to a biomass particle fuel stove. Background Art

[0002] A stove is a device that generates heat energy by burning fuel. According to the different types of fuel materials, stoves can be divided into kerosene stoves, gas stoves, wood stoves and other types. In recent years, with the needs of new rural construction and energy conservation and environmental protection, the development and utilization of biomass stoves has attracted more and more attention and has been gradually promoted and applied. Existing biomass pellet stoves generally include a furnace body, a combustion chamber is provided in the furnace body, and the fuel burns in the combustion chamber to generate heat energy. Conventional stoves generally do not have a fuel supply device, and the fuel needs to be added manually at a certain interval. With the development of automation technology, automatic supply devices have gradually developed and are attached to stoves, which improves the convenience of using stoves.

[0003] In the prior art, the patent document with the publication number "CN112833426A" discloses a civilian biomass vertical water-heating stove, which includes a stove base and a stove shell. A flue header is provided at one end of the stove base and a smoke pipe is provided at the other end. An access panel is installed on the stove shell. A gasification partition combustion system, a heat exchange purification system, a feeding backfire prevention system, a combustion-supporting air distribution ignition system and a cooking system are provided inside the stove shell. The gasification partition combustion system includes a volatile combustion chamber, and the feeding backfire prevention system includes a falling material fire prevention cavity. The bottom end of the falling material fire prevention cavity is connected to the volatile combustion chamber through a downwardly inclined feed pipe. A controller system is provided on the stove shell. This patented technology effectively avoids backburning, backfire and backsmoke phenomena caused by conventional operation and shutdown through non-contact feeding of feeding and combustion, combined with suction cooling design.

[0004] In the prior art, in order to facilitate the addition of fuel, the furnace is provided with a feeding device, and in order to promote the full combustion of the fuel, a corresponding ventilation structure is provided. However, the feeding device and the ventilation structure in the prior art are often relatively independently provided. The feeding device in the prior art generally uses an auger to convey the fuel. The surface of the auger is provided with spiral blades. The material is continuously conveyed forward under the squeezing action of the blades. Since the particle sizes of biomass pellet fuel are different, when a single auger conveys biomass pellet fuel, the fuel is very easy to be blocked between the pipe wall and the auger. Once blocked, the torque on the motor output shaft will increase, threatening the safe and stable operation of the motor. In addition, the ventilation structure directly delivers the airflow containing oxygen into the combustion chamber. While the airflow helps combustion, it will also return the soot or a small amount of solid fuel produced by the combustion to the feeding device, affecting the stable operation of the feeding device. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a biomass pellet fuel stove.

[0006] The utility model is realized through the following technical solutions.

[0007] The utility model provides a biomass particle fuel stove, including a furnace barrel and a feeding device, the lower end of the furnace barrel is connected to the furnace box, a pair of partitions are arranged in the furnace box, the surface of the partitions is provided with primary air distribution holes, and the partitions divide the internal space of the furnace box into a primary air distribution chamber and a combustion chamber, the feeding device includes a first feeding pipe and a second feeding pipe, one end of the first feeding pipe is equipped with a first motor, the other end of the first feeding pipe is connected to the combustion chamber, one end of the second feeding pipe is equipped with a second motor and is provided with a feeding port, the other end of the second feeding pipe is connected to the first feeding pipe, the output shaft of the first motor is fixedly connected to the first auger, the output shaft of the second motor is fixedly connected to the second auger, the upper end of the furnace barrel is provided with a furnace ring, the surface of the furnace ring is provided with secondary air distribution holes, a secondary air distribution chamber is formed around the furnace ring and the inner wall of the furnace barrel, an air supply pipe is also connected between the secondary air distribution chamber and the first feeding pipe, and the surface of the first feeding pipe is also provided with ventilation holes.

[0008] An ash unloading device is also provided below the furnace box. The ash unloading device comprises a furnace plate. The furnace plate and the furnace box are connected together by bolts.

[0009] The furnace box is also fixedly connected to the furnace jacket, and the lower end of the furnace barrel is sleeved in the furnace jacket.

[0010] The feeding device also includes a seat box, one side of the seat box is connected to the furnace box by bolts, and the other side of the seat box is provided with an air inlet, the first feed pipe passes through the seat box, and the ventilation hole is accommodated in the seat box, an air inlet duct is formed around the first feed pipe and the inner wall of the seat box, and the air inlet duct is connected to the primary air distribution chamber.

[0011] The feeding device also includes an electronic ignition rod, one end of which is screwed to the seat box, and the other end of the electronic ignition rod extends into the combustion chamber through the air inlet duct, and the inclination angle between the length direction of the electronic ignition rod and the seat box surface is greater than zero.

[0012] The number of the primary air distribution chambers is 2, and the two primary air distribution chambers are arranged on the left and right sides of the combustion chamber.

[0013] The furnace ring is also fixedly connected with the upper furnace ring and the lower furnace ring respectively. The upper furnace ring covers the upper edge of the furnace barrel, and the lower furnace ring abuts against the inner wall surface of the furnace barrel.

[0014] A material guide plate is also provided in the combustion chamber, and the left and right sides of the material guide plate are respectively fixedly connected to the partition plate, and one end of the material guide plate is also fixedly connected to the lower edge of the inner wall of the furnace box, and an ash unloading hole is formed between the other end of the material guide plate and the inner wall of the furnace box, and the ash unloading hole is close to the upper edge of the inner wall of the furnace box.

[0015] The ash unloading device also includes a cylinder seat, a guide rail box, an ash box and a supporting rod. The furnace plate is fixedly connected to the cylinder seat, the cylinder seat is fixedly connected to the guide rail box, the ash box is inserted into the guide rail box, and the ash box is also fixedly connected to the box cover. A limit pin is also provided on the surface of the guide rail box. The supporting rod is hinged to the box cover, and one end of the supporting rod is fixedly connected to the pull rod, and the other end of the supporting rod is provided with a locking hook. When the supporting rod is rotated and the limit pin is fitted into the locking hook, the surface of the pull rod is in contact with the surface of the box cover.

[0016] The beneficial effect of the utility model is that: by adopting the technical scheme of the utility model, the air supply pipe connects the first feed pipe and the furnace barrel together, which is equivalent to connecting the feeding device and the ventilation structure as one. When the solid fuel is fed into the combustion chamber through the first feed pipe, the airflow also enters the first feed pipe through the ventilation hole, and the airflow then flows along the axial direction of the first auger. On the one hand, oxygen is directly supplied to the combustion chamber, which promotes the full combustion of the fuel. On the other hand, under the blowing action of the airflow, the fuel is prevented from returning to the first feed pipe, thereby ensuring the overall stable operation of the furnace. In addition, the feeding device adopts two augers to convey the biomass pellet fuel at the same time, which not only extends the conveying stroke of the biomass pellet fuel, but also reduces the probability of fuel blockage. The two motors work independently of each other to avoid mutual interference, thereby ensuring the continuous safe and stable operation of the motors, and also increasing the fuel supply flow rate, thereby meeting the demand for timely addition of fuel to the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axonometric drawing of the utility model;

[0018] Figure 2 It is the front view of the utility model;

[0019] Figure 3 The utility model is along Figure 2 Sectional view cut along the AA plane;

[0020] Figure 4 The utility model is along Figure 3 Sectional view of the BB plane;

[0021] Figure 5 The utility model is along Figure 3 Sectional view of the CC plane;

[0022] Figure 6 The utility model is along Figure 3 Sectional view of the middle DD plane;

[0023] Figure 7 It is an axonometric diagram of the feeding device of the utility model;

[0024] Figure 8 It is a top view of the feeding device of the utility model;

[0025] Fig. 9 It is a left view of the feeding device of the utility model;

[0026] Fig.10 This is a front view of the feeding device of the utility model;

[0027] Fig.11 It is an axonometric drawing of the seat box of the utility model;

[0028] Fig.12 It is an axonometric view of the furnace ring of the utility model;

[0029] Fig.13 It is an axonometric drawing of the material guide plate of the utility model;

[0030] Fig.14 It is an axonometric diagram of the utility model dust discharge device;

[0031] Fig.15 This is the front view of the ash unloading device of the utility model;

[0032] Fig.16 This utility model Fig.15 A partial enlarged view of point Ⅰ in the middle;

[0033] Fig.17 It is an axonometric drawing of the support rod of the utility model.

[0034] In the figure: 1-furnace drum, 2-feeding device, 3-furnace box, 4-partition, 5-primary air distribution hole, 6-primary air distribution chamber, 7-combustion chamber, 8-first feeding pipe, 9-second feeding pipe, 10-first motor, 11-second motor, 12-feeding port, 13-first auger, 14-second auger, 15-furnace ring, 16-secondary air distribution hole, 17-secondary air distribution chamber, 18-air supply pipe, 19-ventilation hole, 20-ash unloading device, 21-furnace plate, 2 2-furnace sleeve, 23-hopper, 24-seat box, 25-air inlet, 26-air inlet duct, 27-electronic ignition rod, 28-locking nut, 29-fan, 30-end connecting plate, 31-upper furnace ring, 32-lower furnace ring, 33-guide plate, 34-ash unloading hole, 35-ash leakage hole, 37-ash unloading frame, 38-cylinder seat, 39-guide rail box, 40-ash box, 41-support rod, 42-box cover, 43-limit pin, 44-pull rod, 45-lock hook. DETAILED DESCRIPTION

[0035] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0036] The utility model provides a biomass pellet fuel stove. Figures 1 to 17 As shown, it includes a furnace drum 1 and a feeding device 2, the lower end of the furnace drum 1 is connected to the furnace box 3, a pair of partitions 4 are arranged in the furnace box 3, the surface of the partition 4 is provided with a primary air distribution hole 5, and the partition 4 divides the internal space of the furnace box 3 into a primary air distribution chamber 6 and a combustion chamber 7, the feeding device 2 includes a first feeding pipe 8 and a second feeding pipe 9, one end of the first feeding pipe 8 is installed with a first motor 10, the other end of the first feeding pipe 8 is connected to the combustion chamber 7, and one end of the second feeding pipe 9 is installed with a second motor 11 and is provided with a feeding port 12. The other end of the second feeding pipe 9 is connected to the first feeding pipe 8. The output shaft of the first motor 10 is fixedly connected to the first auger 13. The output shaft of the second motor 11 is fixedly connected to the second auger 14. A furnace ring 15 is provided at the upper end of the furnace drum 1. Secondary air distribution holes 16 are provided on the surface of the furnace ring 15. A secondary air distribution chamber 17 is formed around the furnace ring 15 and the inner wall of the furnace drum 1. An air supply pipe 18 is also connected between the secondary air distribution chamber 17 and the first feeding pipe 8. Ventilation holes 19 are also provided on the surface of the first feeding pipe 8.

[0037] By adopting the technical solution of the utility model, the air supply pipe connects the first feed pipe and the furnace barrel together, which is equivalent to connecting the feeding device and the ventilation structure as one. When the solid fuel is fed into the combustion chamber through the first feed pipe, the airflow also enters the first feed pipe through the ventilation hole, and the airflow then flows along the axial direction of the first auger. On the one hand, oxygen is directly supplied to the combustion chamber, which promotes the full combustion of the fuel. On the other hand, under the blowing action of the airflow, the fuel is prevented from returning to the first feed pipe, thereby ensuring the overall stable operation of the furnace. In addition, the feeding device adopts two augers to transport the biomass pellet fuel at the same time, which not only extends the transportation stroke of the biomass pellet fuel, but also reduces the probability of fuel blockage. The two motors work independently of each other to avoid mutual interference, thereby ensuring the continuous safe and stable operation of the motors, and also increasing the fuel supply flow rate, thereby meeting the demand for timely addition of fuel to the combustion chamber.

[0038] Specifically, an ash unloading device 20 is further provided below the furnace box 3, and the ash unloading device 20 includes a furnace plate 21, and the furnace plate 21 and the furnace box 3 are connected together by bolts. The furnace box 3 is also fixedly connected to the furnace jacket 22, and the lower end of the furnace barrel 1 is sleeved in the furnace jacket 22. With the technical solution of the utility model, the ash unloading device 20, the feeding device 2 and the electronic ignition rod 27 are respectively integrated into various functional modules, which not only facilitates the rapid assembly of these functional modules into a furnace, but also helps to improve the production efficiency of the furnace. In addition, the lower end of the furnace barrel 1 is sleeved in the furnace jacket 22, and when the furnace barrel 1 is damaged and needs to be replaced, it is convenient to replace the furnace barrel 1.

[0039] In addition, the edge of the feed port 12 is also fixedly connected to the hopper 23. The hopper 23 is in the shape of a cone with a large upper end and a small lower end. The length direction of the first auger 13 is parallel to the length direction of the second auger 14. The technical solution of the utility model is adopted, so that when the amount of fuel in the hopper is large, because two augers are running at the same time and delivering fuel at the same time, the probability of fuel blockage is reduced while meeting the demand for adding fuel to the furnace combustion chamber, ensuring the stable operation of the feeding device.

[0040] In addition, the feeding device 2 also includes a seat box 24, one side of the seat box 24 is connected to the furnace box 3 by bolts, the other side of the seat box 24 is provided with an air inlet 25, the first feeding pipe 8 passes through the seat box 24, and the ventilation hole 19 is accommodated in the seat box 24, the first feeding pipe 8 and the inner wall of the seat box 24 form an air inlet duct 26 around, and the air inlet duct 26 is connected to the primary air distribution chamber 6. With the technical solution of the utility model, the seat box supports the first feeding pipe, the second feeding pipe and other components, and all these components are assembled together to form an integral functional module, so that the feeding device can be installed on various types of stoves by bolts for use, which is conducive to expanding the application range of the feeding device and improving convenience.

[0041] Specifically, the feeding device 2 also includes an electronic ignition rod 27, one end of which is screwed to the seat box 24, and the other end of the electronic ignition rod 27 extends into the combustion chamber 7 through the air inlet duct 26, and the inclination angle between the length direction of the electronic ignition rod 27 and the surface of the seat box 24 is greater than zero. The electronic ignition rod 27 is also screwed to the locking nut 28. Preferably, the inclination angle between the length direction of the electronic ignition rod 27 and the surface of the seat box 24 is 20° to 40°. A fan 29 is also provided at the air inlet 25. By adopting the technical solution of the utility model, when the locking nut is in contact with the surface of the seat box, the relative position between the electronic ignition rod and the seat box is kept stable, preventing the electronic ignition rod from falling off when the feeding device is running or moving. On the other hand, at the moment of ignition through the electronic ignition rod, the airflow from the first feeding pipe blows the flame into the combustion chamber, prompting the solid fuel to ignite quickly.

[0042] In addition, there are two primary air distribution chambers 6, which are arranged on the left and right sides of the combustion chamber 7. With the technical solution of the utility model, the biomass particle solid fuel is fed into the combustion chamber via the first feeding pipe. Since the primary air distribution chambers are arranged on the left and right sides of the combustion chamber, the airflows from the primary air distribution chambers blow against each other, which can prevent the solid fuel from being locally accumulated into a mass, so that the solid fuel is evenly spread on the surface of the guide plate, and then the solid fuel is fully burned to release the maximum heat energy. In addition, the airflow can also be fed into the combustion chamber via the first feeding pipe, which directly produces a combustion-supporting effect on the solid fuel on the one hand, and on the other hand, as the solid fuel burns, the burned fuel is lighter in weight and is blown to the tail end of the guide plate by the airflow, so that the solid fuel is evenly spread on the surface of the guide plate, further making the fuel fully burned. When the solid fuel is finally burned into ash, the ash can fall out of the combustion chamber from the ash discharge hole.

[0043] Specifically, the first feeding pipe 8 and the second feeding pipe 9 are also fixedly connected together through the end connecting plate 30, and the first motor 10 and the second motor 11 are both mounted on the surface of the end connecting plate 30. Thus, each component is highly integrated in the feeding device, which improves the integration and modularity of the feeding device and facilitates maintenance or replacement.

[0044] Further, the furnace ring 15 is also fixedly connected to the upper furnace ring 31 and the lower furnace ring 32 respectively, the upper furnace ring 31 covers the upper edge of the furnace drum 1, and the lower furnace ring 32 abuts against the inner wall surface of the furnace drum 1. Preferably, the furnace ring 15, the upper furnace ring 31, and the lower furnace ring 32 are integrally manufactured. The inclination angle between the surface of the lower furnace ring 32 and the axial direction of the furnace drum 1 is greater than zero. The number of primary air distribution holes 5 is multiple, and the multiple primary air distribution holes 5 are arranged on the surface of the partition 4 in a linear array. The number of secondary air distribution holes 16 is multiple, and the multiple secondary air distribution holes 16 are arranged around the furnace ring 15 in a circular array. By adopting the technical solution of the utility model, the solid fuel is first burned for the first time in the combustion chamber. Since the primary air distribution chamber is arranged on the left and right sides of the combustion chamber, the airflows from the primary air distribution chamber blow against each other, which can avoid local accumulation of solid fuel and make the solid fuel evenly spread on the surface of the guide plate, and then make the solid fuel burn fully for the first time. The high-temperature flue gas after the first combustion enters the furnace ring, and the airflow from the external environment is evenly distributed in the secondary air distribution chamber, and then enters the furnace ring from all directions, so that the high-temperature flue gas in the furnace barrel can be fully burned for the second time everywhere. Since the inclination angle between the surface of the lower furnace ring and the axial direction of the furnace barrel 1 is greater than zero, the high-temperature flue gas can gather and enter the furnace ring, and further make the high-temperature flue gas fully burn for the second time.

[0045] In addition, a guide plate 33 is provided in the combustion chamber 7, and the left and right sides of the guide plate 33 are respectively fixedly connected to the partition 4, one end of the guide plate 33 is also fixedly connected to the lower edge of the inner wall of the furnace box 3, and the other end of the guide plate 33 and the inner wall of the furnace box 3 are surrounded by an ash discharge hole 34, and the ash discharge hole 34 is close to the upper edge of the inner wall of the furnace box 3. Preferably, the projection of the guide plate 33 on the surface of the partition 4 is S-shaped. The surface of the guide plate 33 is also provided with a plurality of ash leakage holes 35. The number of the ash leakage holes 35 is multiple, and the plurality of ash leakage holes 35 are arranged on the surface of the guide plate 33 in a linear array. With the technical solution of the utility model, since the airflow is also sent into the combustion chamber through the first feed pipe, on the one hand, it has a combustion-supporting effect on the solid fuel in the combustion chamber, and on the other hand, it also makes the solid fuel evenly spread along the surface of the guide plate, so that the solid fuel is fully burned for the first time in an aerobic environment, and the ash formed by the combustion is timely discharged through the ash discharge hole and the ash leakage hole to avoid the ash affecting the combustion effect.

[0046] In addition, the furnace box 3 is also fixedly connected to the ash unloading frame 37, and the ash unloading frame 37 is arranged below the guide plate 33. The ash unloading device 20 also includes a cylinder seat 38, a guide rail box 39, an ash box 40 and a support rod 41. The furnace plate 21 is fixedly connected to the cylinder seat 38, the cylinder seat 38 is fixedly connected to the guide rail box 39, the ash box 40 is sleeved in the guide rail box 39, and the ash box 40 is also fixedly connected to the box cover 42. The surface of the guide rail box 39 is also provided with a limit pin 43. The support rod 41 is hinged to the box cover 42, and one end of the support rod 41 is fixedly connected to the pull rod 44. The other end of the support rod 41 is provided with a lock hook 45. When the support rod 41 is rotated and the limit pin 43 is sleeved in the lock hook 45, the surface of the pull rod 44 is close to the surface of the box cover 42.

[0047] Specifically, the four edges of the guide rail box 39 are also fixedly connected to the furnace plate 21. There are two support rods 41, which are arranged on the left and right sides of the box cover 42. The two support rods 41 are connected as a whole by a pull rod 44. The pull rod 44 can be replaced by a round steel pipe. The support rod 41 is an S-shaped thin plate as a whole. By adopting the technical solution of the utility model, ashes are collected by an ash box. After the ashes are collected enough, when the user applies force to the pull rod, the support rod rotates relative to the box cover, and the outer surface of the locking hook slides along the surface of the box cover, so that the box cover has a reverse assisting effect on the support rod, so that the operator can easily pull out the ash box. During the process of the ash box collecting ashes, the ash box is still set at the bottom of the stove, and the pull rod is attached to the surface of the box cover. The limit pin is fitted into the locking hook, which can lock the relative position between the pull rod and the box cover to prevent the pull rod from shaking, reduce the probability of pedestrians near the stove touching the pull rod with their feet, and reduce the probability of nearby pedestrians being injured. The guide box and the furnace plate are welded as a whole, which can prevent ashes from flying out from the edge of the ash box to avoid affecting the surrounding environment.

Claims

1. A biomass pellet fuel stove, characterized in that: The invention comprises a furnace drum (1) and a feeding device (2), wherein the lower end of the furnace drum (1) is connected to a furnace box (3), a pair of partitions (4) are arranged in the furnace box (3), the surface of the partitions (4) is provided with primary air distribution holes (5), and the partitions (4) divide the internal space of the furnace box (3) into a primary air distribution chamber (6) and a combustion chamber (7), and the feeding device (2) comprises a first feeding pipe (8) and a second feeding pipe (9), one end of the first feeding pipe (8) is provided with a second air distribution hole (5), and the first air distribution hole (5) is provided on the surface of the partitions (4). a motor (10), the other end of the first feed pipe (8) is connected to the combustion chamber (7), one end of the second feed pipe (9) is equipped with a second motor (11) and is provided with a feed port (12), the other end of the second feed pipe (9) is connected to the first feed pipe (8), the output shaft of the first motor (10) is fixedly connected to the first auger (13), the output shaft of the second motor (11) is fixedly connected to the second auger (14), and the upper end of the furnace drum (1) is provided with A furnace ring (15) is provided, and a secondary air distribution hole (16) is provided on the surface of the furnace ring (15); a secondary air distribution chamber (17) is formed around the furnace ring (15) and the inner wall of the furnace barrel (1); an air supply pipe (18) is also connected between the secondary air distribution chamber (17) and the first feeding pipe (8); and a ventilation hole (19) is also provided on the surface of the first feeding pipe (8); the feeding device (2) also includes a seat box (24), and one side of the seat box (24) is connected to the The furnace boxes (3) are connected together by bolts, and an air inlet (25) is provided on the other side of the seat box (24). The first feed pipe (8) passes through the seat box (24), and the ventilation hole (19) is accommodated in the seat box (24). An air inlet duct (26) is formed around the first feed pipe (8) and the inner wall of the seat box (24), and the air inlet duct (26) is connected to the primary air distribution chamber (6); a fan (29) is also provided at the air inlet (25).

2. A biomass pellet fuel stove as claimed in claim 1, characterized in that: An ash unloading device (20) is also provided below the furnace box (3). The ash unloading device (20) comprises a furnace plate (21). The furnace plate (21) and the furnace box (3) are connected together by bolts.

3. A biomass pellet fuel stove as claimed in claim 1, characterized in that: The furnace box (3) is also fixedly connected to the furnace jacket (22), and the lower end of the furnace barrel (1) is sleeved in the furnace jacket (22).

4. A biomass pellet fuel stove as claimed in claim 1, characterized in that: The feeding device (2) also includes an electronic ignition rod (27), one end of which is screwed to the seat box (24), and the other end of the electronic ignition rod (27) extends into the combustion chamber (7) through the air inlet duct (26), and the inclination angle between the length direction of the electronic ignition rod (27) and the surface of the seat box (24) is greater than zero.

5. A biomass pellet fuel stove as claimed in claim 1, characterized in that: The number of the primary air distribution chambers (6) is two, and the two primary air distribution chambers (6) are arranged on the left and right sides of the combustion chamber (7).

6. A biomass pellet fuel stove as claimed in claim 1, characterized in that: The furnace ring (15) is also fixedly connected to an upper furnace ring (31) and a lower furnace ring (32) respectively. The upper furnace ring (31) covers the upper edge of the furnace barrel (1), and the lower furnace ring (32) abuts against the inner wall surface of the furnace barrel (1).

7. A biomass pellet fuel stove as claimed in claim 1, characterized in that: A guide plate (33) is also provided in the combustion chamber (7), and the left and right sides of the guide plate (33) are respectively fixedly connected to the partition plate (4), and one end of the guide plate (33) is also fixedly connected to the lower edge of the inner wall of the furnace box (3), and an ash discharge hole (34) is formed between the other end of the guide plate (33) and the inner wall of the furnace box (3), and the ash discharge hole (34) is close to the upper edge of the inner wall of the furnace box (3).

8. A biomass pellet fuel stove as claimed in claim 2, characterized in that: The ash unloading device (20) also includes a cylinder seat (38), a guide rail box (39), an ash box (40) and a support rod (41). The furnace plate (21) is fixedly connected to the cylinder seat (38), the cylinder seat (38) is fixedly connected to the guide rail box (39), the ash box (40) is inserted into the guide rail box (39), the ash box (40) is also fixedly connected to the box cover (42), a limit pin (43) is also provided on the surface of the guide rail box (39), the support rod (41) is hinged to the box cover (42), and one end of the support rod (41) is fixedly connected to the pull rod (44), and the other end of the support rod (41) is provided with a locking hook (45). When the support rod (41) is rotated and the limit pin (43) is fitted into the locking hook (45), the surface of the pull rod (44) is in contact with the surface of the box cover (42).

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