Biomass fuel compression granulator

Abstract

The invention belongs to the technical field of granulators, and particularly relates to a biomass fuel compression granulator which comprises a feeding pipe and a screening treatment box, a discharging plate is fixedly mounted in the screening treatment box, an air inlet fan is arranged on the screening treatment box, a screening plate is fixedly mounted on the discharging plate, and a receiving box is slidably mounted on the screening plate. A material collecting block is fixedly installed at the end, close to the screening plate, of the material collecting box and attached to the screening plate, a feeding port is formed in the end, close to the material collecting block, of the material collecting box, a disturbance ring is rotationally installed at the end, away from the screening plate, of the material collecting box, an air cavity is formed in the inner wall of the disturbance ring, and an air nozzle is fixedly installed on the inner wall of the disturbance ring. By reducing the content of impurities in crushed materials, not only can the abrasion of subsequent mold holes and the surfaces of the compression rollers be protected, but also the bonding effect of lignin can be improved, and thus the quality of fuel particle finished products is improved.

Description

Technical Field

[0001] This invention belongs to the field of pellet mill technology, specifically a biomass fuel compression pellet mill. Background Technology

[0002] A biomass fuel compression pellet mill is a mechanical device that processes agricultural and forestry waste (such as sawdust, straw, rice husks, etc.) into high-density pellet fuel. Its working principle is to soften the lignin in the raw materials by high-pressure extrusion and friction to generate heat, and then form it through a ring die or flat die, and cut it into regular pellets with a diameter of 6-10mm and a length of 15-30mm by a cutter.

[0003] Before biomass fuel can be compressed into pellets, materials such as wood chips and straw need to be crushed and then fed into the pellet mill for processing. However, during the harvesting of crops, impurities such as sand and soil are easily mixed in. The fine silica sand in the sand acts like an abrasive, accelerating the wear of the die holes and the surface of the pressure rollers, shortening their service life. Furthermore, dust lacks the binding effect of lignin, making it brittle and thus reducing the quality of the finished pellets.

[0004] Therefore, the present invention provides a biomass fuel compression pelletizer. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a biomass fuel compression pellet mill according to the present invention, including a feed pipe and a screening and processing box;

[0007] A discharge plate is fixedly installed inside the screening box, an air intake fan is provided on the screening box, and a screening plate is fixedly installed on the discharge plate.

[0008] A receiving box is slidably installed on the screening plate. A collecting block is fixedly installed at one end of the receiving box near the screening plate. The collecting block is in contact with the screening plate. A feeding port is opened at one end of the receiving box near the collecting block.

[0009] The receiving box is rotatably mounted with a disturbance ring at the end away from the screening plate. An air cavity is opened on the inner wall of the disturbance ring, and an air nozzle is fixedly installed on the inner wall of the disturbance ring.

[0010] The discharge plate is provided with a sliding groove, a processing ring is slidably installed on the sliding groove, a discharge pipe is slidably installed at the bottom of the processing ring, the discharge pipe is slidably installed inside the sliding groove, and the disturbance ring is rotatably installed on the processing ring.

[0011] A dust removal ring is fixedly installed at the end of the processing ring away from the disturbance ring. A first filter screen is fixedly installed inside the dust removal ring, and the bottom end of the dust removal ring is open.

[0012] An air pump is fixedly installed at the top of the screening and processing box. An air pipe is fixedly connected to the output end of the air pump. The other end of the air pipe passes through the processing ring and extends to the air cavity opened in the inner wall of the disturbance ring.

[0013] A reciprocating screw is rotatably installed on the inner wall of the screening box. A guide block is threadedly connected to the reciprocating screw. The guide block is fixedly installed on the top of the receiving box. A motor is externally connected to the other end of the reciprocating screw.

[0014] One end of the disturbance ring extends into the inside of the receiving box and is fixedly installed with a toothed ring. A double-headed gear shaft is rotatably installed inside the receiving box. A sliding groove is opened on the inner wall of the screening plate. A second toothed plate is fixedly installed inside the sliding groove. One end of the double-headed gear shaft meshes with the toothed ring, and the other end extends into the inside of the sliding groove and meshes with the second toothed plate.

[0015] A baffle plate is rotatably installed inside the discharge pipe. The side wall of the baffle plate extends to the inner wall of the processing ring via a rotating shaft and is fixedly installed with a rotating gear. A first toothed plate is fixedly installed on the inner wall of the processing ring. A baffle plate for blocking the feed inlet on the receiving box is fixedly installed on the discharge pipe via a connecting rod.

[0016] The inner wall of the chute is provided with a guide groove, and a guide rod is fixedly installed on the outer wall of the discharge pipe. One end of the guide rod extends into the interior of the guide groove. Both ends of the guide groove are inclined. Both ends of the interior of the chute are provided with a winding net, and the other ends of the two winding nets are fixedly connected to the discharge pipe respectively.

[0017] A second filter screen is slidably installed inside the dust removal ring. The second filter screen and the first filter screen are attracted or repelled by an electromagnet. The mesh openings of the second filter screen and the first filter screen are misaligned.

[0018] A guide brush is rotatably mounted on one end of the receiving box, and a transmission gear that meshes with a gear ring is fixedly mounted on one end of the guide brush. There are two guide brushes, which are symmetrically arranged on both sides of the receiving box.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The biomass fuel compression pellet mill of the present invention achieves preliminary and efficient screening of crushed materials through the cooperation of an air intake fan and a screening plate. The airflow generated by the air intake fan blows the lighter crushed materials toward the screening plate, while dust particles pass through the screening plate first, while heavier stones, soil clods and metal fragments fall to the discharge plate under the action of gravity. This effectively reduces the impurity content in the crushed materials, not only reducing the risk of wear on the die holes and pressure roller surfaces in subsequent processes, but also significantly improving the binding effect of lignin, thereby improving the finished quality of fuel pellets.

[0021] 2. The biomass fuel compression pellet mill of the present invention, through the sliding of the receiving box, drives the turbulence ring to rotate, and the air pump supplies air to the air chamber through the air pipe, so that the air nozzle surrounds and blows the crushed material. The airflow drives the material to continuously change its posture, so that the fine particles mixed in pass through the first filter screen and are discharged from the dust removal ring, while the purified material is output through the discharge pipe. This dynamic blowing and filtering mechanism can thoroughly remove the fine impurities in the material, further protect the mold and the pressure roller, and optimize the lignin bonding performance, ultimately greatly improving the finished quality of the fuel pellets. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a perspective view of the present invention;

[0024] Figure 2 This is a cross-sectional view of the screening and processing box in this invention;

[0025] Figure 3 In this invention Figure 2 Enlarged view of point A in the image;

[0026] Figure 4 This is a schematic diagram of the structure of the roll-up barrier net in this invention;

[0027] Figure 5 In this invention Figure 4 Enlarged view of point B in the image;

[0028] Figure 6 This is a schematic diagram of the structure of the aggregate block in this invention;

[0029] Figure 7 This is a schematic diagram of the installation of the guide brush in this invention;

[0030] Figure 8 This is a schematic diagram of the barrier plate in this invention;

[0031] Figure 9 This is a cross-sectional view of the disturbance ring in this invention.

[0032] In the diagram: 1. Feed pipe; 2. Screening box; 3. Air intake fan; 4. Discharge plate; 5. Screening plate; 6. Air pump; 7. Air pipe; 8. Reciprocating screw; 9. Slide chute; 10. Rewinding net; 11. Guide groove; 12. Guide rod; 13. Receiving box; 14. Guide brush; 15. Collecting block; 16. Guide block; 17. Disturbance ring; 18. Double-headed gear shaft; 19. Gear ring; 20. Air nozzle; 21. Processing ring; 22. Dust removal ring; 23. Transmission gear; 24. Discharge pipe; 25. First toothed plate; 26. Baffle plate; 27. First filter screen; 28. Second filter screen; 29. ​​Second toothed plate; 30. Rotating gear; 31. Baffle plate. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] like Figures 1 to 9 As shown in the figure, a biomass fuel compression pellet mill according to an embodiment of the present invention includes a feed pipe 1 and a screening and processing box 2;

[0035] A discharge plate 4 is fixedly installed inside the screening box 2. An air intake fan 3 is installed on the screening box 2. A screening plate 5 is fixedly installed on the discharge plate 4.

[0036] The discharge plate 4 is inclined, and the screening plate 5 is positioned away from the air intake fan 3. When the feed pipe 1 sends the crushed material into the screening box 2, the air intake fan 3 blows the external airflow toward the screening plate 5. At this time, the lighter crushed material will flow toward the screening plate 5 under the action of the airflow. In this process, the lighter dust particles in the crushed material will be separated from the crushed material and pass through the screening plate 5 first under the action of the airflow. The heavier stones, soil and metal fragments cannot be carried away by the airflow and will fall onto the discharge plate 4 under the action of gravity, completing the preliminary filtration of the crushed material, reducing the impurities in the crushed material as much as possible, reducing the wear of the mold hole and the surface of the pressure roller due to impurities, and increasing the adhesion effect of lignin, thereby improving the quality of the finished fuel pellets.

[0037] A receiving box 13 is slidably installed on the screening plate 5. A collecting block 15 is fixedly installed on one end of the receiving box 13 near the screening plate 5. The collecting block 15 is in contact with the screening plate 5. A feeding port is opened on one end of the receiving box 13 near the collecting block 15.

[0038] The material collection block 15 is inclined inward at one end near the receiving box 13. Under the action of airflow, the crushed material cannot pass through the screen plate 5, so a large amount of crushed material will stick to the surface of the screen plate 5 under the action of airflow. At this time, when the receiving box 13 slides on the screen plate 5, the crushed material sticking to the screen plate 5 can be scraped off by the material collection block 15. And by the obstruction of airflow by the receiving box 13, the crushed material will fall under the action of gravity and enter the interior of the receiving box 13 through the inclined surface set on the material collection block 15.

[0039] A disturbance ring 17 is rotatably installed at the end of the receiving box 13 away from the screening plate 5. An air cavity is opened on the inner wall of the disturbance ring 17, and an air nozzle 20 is fixedly installed on the inner wall of the disturbance ring 17.

[0040] A chute 9 is provided on the discharge plate 4. A processing ring 21 is slidably installed on the chute 9. A discharge pipe 24 is slidably installed at the bottom of the processing ring 21. The discharge pipe 24 is slidably installed inside the chute 9. A disturbance ring 17 is rotatably installed on the processing ring 21.

[0041] A dust removal ring 22 is fixedly installed at the end of the processing ring 21 away from the disturbance ring 17. A first filter screen 27 is fixedly installed inside the dust removal ring 22, and the bottom end of the dust removal ring 22 is open.

[0042] The inner cavities of the receiving box 13, the disturbance ring 17, the processing ring 21, and the dust removal ring 22 are all connected. When the receiving box 13 slides on the screening plate 5, it can simultaneously drive the disturbance ring 17, the processing ring 21, and the dust removal ring 22 to move. Only the disturbance ring 17 can rotate.

[0043] The inner cavity of the disturbance ring 17 is connected to the receiving box 13, so the crushed material entering the receiving box 13 will also occupy the space of the disturbance ring 17. The air nozzle 20 is partially installed; when the air nozzle 20 rotates, it can perform annular blowing on the crushed material located in the receiving box 13 and the disturbance ring 17. When the air nozzle 20 rotates downwards and the air jet direction is from bottom to top, the crushed material can be blown upwards. As the disturbance ring 17 drives the air nozzle 20 to rotate and blow air simultaneously, the posture of the crushed material inside the disturbance ring 17 and the receiving box 13 can be continuously changed. After the airflow is ejected, it will pass through the first filter screen 27 and be discharged from the bottom of the dust removal ring 22. The disturbance ring 17 drives the air nozzle 20 to rotate and spray air in a circular motion, changing the attitude of the crushed material in the air. This removes the fine particles mixed in with the crushed material and, under the flow of air, passes through the first filter screen 27 and is discharged from the dust removal ring 22, thus achieving secondary purification of the crushed material. The treated crushed material can then be discharged through the discharge pipe 24 set on the treatment ring 21, facilitating the subsequent pelleting process. By treating the crushed material multiple times, impurities inside the crushed material are removed as much as possible. This not only protects the wear of the subsequent mold holes and pressure roller surfaces but also improves the adhesion effect of lignin, thereby improving the quality of the finished fuel pellets.

[0044] An air pump 6 is fixedly installed at the top of the screening and processing box 2. An air pipe 7 is fixedly connected to the output end of the air pump 6. The other end of the air pipe 7 passes through the processing ring 21 and extends to the air cavity opened in the inner wall of the disturbance ring 17.

[0045] The air pump 6 can be used to introduce gas into the air chamber inside the disturbance ring 17, so that the gas is ejected from the air nozzle 20. In conjunction with the rotation of the disturbance ring 17, the gas is sprayed around the crushed material, which changes the posture of the crushed material in the air, making it easier to remove the fine particles mixed in the crushed material, further improving the processing effect of the crushed material, and thus improving the quality of the finished fuel pellets.

[0046] A reciprocating screw 8 is rotatably installed on the inner wall of the screening and processing box 2. A guide block 16 is threadedly connected to the reciprocating screw 8. The guide block 16 is fixedly installed on the top of the receiving box 13. The other end of the reciprocating screw 8 is connected to an external motor.

[0047] One end of the disturbance ring 17 extends into the interior of the receiving box 13 and is fixedly installed with a toothed ring 19. A double-headed gear shaft 18 is rotatably installed inside the receiving box 13. A sliding groove is provided on the inner wall of the screening plate 5. A second toothed plate 29 is fixedly installed inside the sliding groove. One end of the double-headed gear shaft 18 meshes with the toothed ring 19, and the other end extends into the interior of the sliding groove and meshes with the second toothed plate 29.

[0048] The reciprocating screw 8 is driven by a motor to rotate, which in turn drives the guide block 16 and the receiving box 13 to slide back and forth on the surface of the reciprocating screw 8. At this time, the receiving box 13 drives the double-headed gear shaft 18 to slide inside the sliding groove. Under the action of the second toothed plate 29, the double-headed gear shaft 18 rotates. Under the action of the gear ring 19, the disturbance ring 17 rotates. With the air delivery of the air pump 6, the effect of air jetting around the crushed material is achieved, which changes the posture of the crushed material in the air, making it easier to remove the fine particles mixed in the crushed material, further improving the processing effect of the crushed material, and thus improving the quality of the finished fuel pellets.

[0049] In a preferred embodiment of the present invention, a baffle plate 26 is rotatably installed inside the discharge pipe 24. The side wall of the baffle plate 26 extends to the inner wall of the processing ring 21 via a rotating shaft and is fixedly installed with a rotating gear 30. A first toothed plate 25 is fixedly installed on the inner wall of the processing ring 21. A baffle plate 31 for blocking the feed inlet on the receiving box 13 is fixedly installed on the discharge pipe 24 via a connecting rod.

[0050] The baffle plate 26 can be rotated inside the discharge pipe 24 by external force. When the baffle plate 26 rotates to the horizontal position, it can block the inner diameter of the discharge pipe 24. At this time, neither the airflow nor the crushed material can be discharged from the discharge pipe 24. When the baffle plate 26 rotates to the vertical position, it will not block the inner diameter of the discharge pipe 24, and the airflow can carry the crushed material out of the discharge pipe 24.

[0051] The discharge pipe 24 is rigidly connected to the baffle plate 31 via a connecting rod. When the baffle plate 26 is in a horizontal state, the baffle plate 31 will not block the feed port on the receiving box 13. When the baffle plate 26 is in a vertical state, the baffle plate 31 will block the feed port on the receiving box 13.

[0052] When the feed inlet is not blocked, the crushed material can enter the inside of the receiving box 13 through the feed inlet. At this time, the baffle plate 26 is in a horizontal state, and the airflow can only pass through the first filter screen 27 and be discharged from the bottom opening of the dust removal ring 22. Therefore, when the disturbance ring 17 drives the air nozzle 20 to spray the crushed material in a circumferential manner, the airflow can carry away the fine particles carried in the crushed material and be discharged from the dust removal ring 22. When the baffle plate 31 blocks the feed inlet, the baffle plate 26 rotates to a vertical state, the discharge pipe 24 is opened, and the airflow can carry the cleaned crushed material out of the discharge pipe 24.

[0053] In a preferred embodiment of the present invention, the inner wall of the chute 9 is provided with a guide groove 11, and the outer wall of the discharge pipe 24 is fixedly installed with a guide rod 12. One end of the guide rod 12 extends into the interior of the guide groove 11, and both ends of the guide groove 11 are inclined.

[0054] The guide groove 11 has a parallelogram cross-section. When the receiving box 13 slides from the left side to the right side of the discharge plate 4 (in the left-right direction), Figure 6 (For reference), the guide rod 12 slides from the bottom of the guide groove 11. Under the action of the inclined surface, it slides to the top of the guide groove 11. At the same time, the discharge pipe 24 slides upward inside the processing ring 21. At this time, the baffle plate 26 is in a horizontal state, and the baffle plate 31 does not block the feed inlet. The airflow can only pass through the first filter screen 27 and be discharged from the bottom opening of the dust removal ring 22. Therefore, when the disturbance ring 17 drives the air nozzle 20 to spray the crushed material in a circumferential manner, the airflow can carry away the fine particles carried in the crushed material and discharge them from the dust removal ring 22. Until it slides to the rightmost side and is ready to slide to the left, the guide rod 12 slides down and to the bottom of the guide groove 11 through the inclined surface of the guide groove 11. The baffle plate 26 is in a vertical state, and the baffle plate 31 blocks the feed inlet. The airflow can then carry the cleaned crushed material out of the discharge pipe 24.

[0055] Both ends of the inside of the chute 9 are provided with a winding barrier 10, and the other ends of the two winding barriers 10 are fixedly connected to the discharge pipe 24 respectively.

[0056] The retractable roll-up net 10 can block the gaps in the slide 9 in real time. This solution is a well-known technical means in the art, and will not be described in detail here.

[0057] In a preferred embodiment of the present invention, a second filter 28 is slidably installed inside the dust removal ring 22. The second filter 28 and the first filter 27 are attracted or repelled by an electromagnet, and the mesh openings on the second filter 28 and the first filter 27 are misaligned.

[0058] When the second filter screen 28 is attached to the first filter screen 27, it can block the passage between the dust removal ring 22 and the processing ring 21. When the baffle plate 26 is in a vertical state and the baffle plate 31 blocks the feed inlet, the airflow direction is more stable and can only be discharged through the discharge pipe 24, thereby improving the efficiency of the airflow driving the cleaned crushed material to be discharged from the discharge pipe 24.

[0059] In a preferred embodiment of the present invention, a guide brush 14 is rotatably mounted on one end of the receiving box 13. A transmission gear 23 that meshes with the gear ring 19 is fixedly mounted on one end of the guide brush 14. There are two guide brushes 14, which are symmetrically arranged on both sides of the receiving box 13.

[0060] When the receiving box 13 slides back and forth on the surface of the screening plate 5, the receiving box 13 will drive the double-headed gear shaft 18 to slide inside the sliding groove. Under the action of the second toothed plate 29, the double-headed gear shaft 18 will rotate, which will drive the gear ring 19 to rotate. At this time, the two guide brushes 14 will rotate and, in coordination with the movement of the receiving box 13, sweep the crushed material adhering to the screening plate 5 into the inside of the receiving box 13, so as to facilitate the auxiliary disturbance ring 17 to process the material inside the receiving box 13.

[0061] Working principle: The feed pipe 1 sends the crushed material into the screening box 2. The airflow generated by the intake fan 3 blows the light material toward the screening plate 5. During this process, fine particles such as dust pass through the screening plate 5 first and complete the initial separation, while heavier impurities such as stones and metal fragments slide down and are discharged along the inclined discharge plate 4. The crushed material adhering to the surface of the screening plate 5 is collected by the reciprocating receiving box 13. Its collection block 15 scrapes the material into the box. When the receiving box 13 moves, it drives the disturbance ring 17 to rotate through the double-headed gear shaft 18. Pump 6 supplies air to the inner cavity of the disturbance ring 17 through air pipe 7, causing the air nozzle 20 to form a surrounding jet airflow that continuously throws and disperses the material. During this process, fine impurities pass through the first filter screen 27 with the airflow and are discharged from the dust removal ring 22, while the purified material is discharged through the discharge pipe 24. Throughout the process, the linkage design of the baffle plate 26 and the barrier plate 31 realizes the automatic switching between purification and discharge modes. The movement of the second filter screen 28 further optimizes the airflow distribution, thereby improving the lignin bonding effect and thus improving the quality of the finished fuel pellets.

[0062] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0063] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biomass fuel compression pellet mill, comprising a feed pipe (1) and a screening and processing box (2); Its features are: The screening processing box (2) is fixedly installed with a discharge plate (4), the screening processing box (2) is equipped with an air intake fan (3), and the discharge plate (4) is fixedly installed with a screening plate (5). A receiving box (13) is slidably installed on the screening plate (5). A collecting block (15) is fixedly installed on one end of the receiving box (13) near the screening plate (5). The collecting block (15) is in contact with the screening plate (5). An inlet is opened on one end of the receiving box (13) near the collecting block (15). The receiving box (13) is rotatably mounted with a disturbance ring (17) at the end away from the screening plate (5). An air cavity is opened on the inner wall of the disturbance ring (17), and an air nozzle (20) is fixedly installed on the inner wall of the disturbance ring (17). The discharge plate (4) is provided with a groove (9), a processing ring (21) is slidably installed on the groove (9), a discharge pipe (24) is slidably installed at the bottom of the processing ring (21), the discharge pipe (24) is slidably installed inside the groove (9), and the disturbance ring (17) is rotatably installed on the processing ring (21). A dust removal ring (22) is fixedly installed at one end of the processing ring (21) away from the disturbance ring (17). A first filter screen (27) is fixedly installed inside the dust removal ring (22), and the bottom end of the dust removal ring (22) is open.

2. The biomass fuel compression pelletizer according to claim 1, characterized in that: An air pump (6) is fixedly installed at the top of the screening and processing box (2). An air pipe (7) is fixedly connected to the output end of the air pump (6). The other end of the air pipe (7) passes through the processing ring (21) and extends to the air cavity opened in the inner wall of the disturbance ring (17).

3. The biomass fuel compression pelletizer according to claim 2, characterized in that: The inner wall of the screening and processing box (2) is rotatably mounted with a reciprocating screw (8), and a guide block (16) is threadedly connected to the reciprocating screw (8). The guide block (16) is fixedly installed on the top of the receiving box (13), and the other end of the reciprocating screw (8) is connected to an external motor.

4. A biomass fuel compression pelletizer according to claim 3, characterized in that: One end of the disturbance ring (17) extends into the inside of the receiving box (13) and is fixedly installed with a toothed ring (19). A double-headed gear shaft (18) is rotatably installed inside the receiving box (13). A sliding groove is provided on the inner wall of the screening plate (5). A second toothed plate (29) is fixedly installed inside the sliding groove. One end of the double-headed gear shaft (18) meshes with the toothed ring (19), and the other end extends into the inside of the sliding groove and meshes with the second toothed plate (29).

5. A biomass fuel compression pelletizer according to claim 4, characterized in that: The discharge pipe (24) is rotatably mounted with a baffle plate (26). The side wall of the baffle plate (26) extends to the inner wall of the processing ring (21) via a rotating shaft and is fixedly mounted with a rotating gear (30). The inner wall of the processing ring (21) is fixedly mounted with a first toothed plate (25). The discharge pipe (24) is fixedly mounted with a baffle plate (31) for blocking the feed inlet of the receiving box (13) via a connecting rod.

6. A biomass fuel compression pelletizer according to claim 5, characterized in that: The inner wall of the chute (9) is provided with a guide groove (11), and the outer wall of the discharge pipe (24) is fixedly installed with a guide rod (12). One end of the guide rod (12) extends into the interior of the guide groove (11). Both ends of the guide groove (11) are inclined. Both ends of the interior of the chute (9) are provided with a winding net (10), and the other ends of the two winding nets (10) are fixedly connected to the discharge pipe (24).

7. A biomass fuel compression pelletizer according to claim 6, characterized in that: The dust removal ring (22) has a second filter screen (28) slidably installed inside. The second filter screen (28) and the first filter screen (27) are attracted or repelled by an electromagnet. The mesh openings on the second filter screen (28) and the first filter screen (27) are misaligned.

8. A biomass fuel compression pelletizer according to claim 7, characterized in that: The receiving box (13) is rotatably mounted with a guide brush (14) at one end. A transmission gear (23) that meshes with a gear ring (19) is fixedly mounted at one end of the guide brush (14). There are two guide brushes (14), which are symmetrically arranged on both sides of the receiving box (13).

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