Biomass fuel compression granulator based on wood chips
By introducing a spiral coolant channel and heat sink system into the biomass fuel compression pellet mill to recover frictional heat, and by using spiral blades and a return spring to design pre-compress the material, the problems of frictional heat and air discharge are solved, heat reuse and pellet density are achieved, and energy consumption and production stability are reduced.
Patent Information
- Application Number
- CN202511431735.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-09
- Publication Date
- 2025-11-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing biomass fuel compression pellet mills do not recover or utilize the frictional heat and high-temperature pellet heat generated during the extrusion molding process, and it is difficult to effectively remove air from the material, resulting in loose biomass fuel pellets after molding.
The spiral coolant channel recovers the extrusion friction heat, which is converted into hot air through the heat sink in the storage tank for preheating and drying of raw materials. Combined with the pre-compression design of the spiral blades and return spring, the air in the material is effectively discharged.
It enables heat recovery and reuse, reduces production energy consumption, ensures the density and production stability of biomass fuel pellets, and avoids pellet loosening.
Smart Images
Figure CN120966537A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of biomass fuel pellet technology, and more particularly to a wood chip-based biomass fuel compression pellet mill. Background Technology
[0002] Biomass fuel refers to fuel made by burning biomass materials, mainly agricultural and forestry waste (such as straw, sawdust, bagasse, rice husks, etc.). It is mainly different from fossil fuels. According to national policies and environmental protection standards, direct combustion of biomass is considered a high-pollution fuel and is only used in rural stoves, not in cities. The actual application of biomass fuel is mainly biomass briquettes, which are made by crushing, mixing, extruding, drying and other processes to produce various shapes (such as blocks, pellets, etc.) of a new type of clean fuel that can be directly burned.
[0003] Biomass fuel compression pellet mills are key equipment for extruding agricultural and forestry waste such as sawdust and straw into pellet fuel under high pressure. Among them, the ring die-roller pellet mill is the most widely used mainstream model. However, existing equipment of this type has the following problems in actual production: 1. During the process of the material being forcefully extruded and formed between the ring die and the pressure roller, a large amount of frictional heat is generated. At the same time, the high-temperature particles that have just been extruded from the ring die hole need to be cooled by additional cooling equipment, which further increases energy consumption. There is no way to recover and reuse the heat generated by friction and the heat in the high-temperature particles. 2. Conventional screw feeders or simple conical hoppers are unable to effectively remove air from the material, resulting in loose biomass fuel pellets after molding. Summary of the Invention
[0004] This invention provides a wood chip-based biomass fuel compression pelletizer, which solves the problem that existing pelletizers do not recover and reuse the heat generated by friction and the heat in the high-temperature pellets, making it difficult to effectively remove air from the material, resulting in loose biomass fuel pellets after molding.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A wood-based biomass fuel compression pellet mill includes a base with a mounting mechanism on top. The mounting mechanism includes a mounting bracket welded to the outer wall of the base top, a mounting cylinder with a discharge port at the bottom, a cylinder cover connected to the outer wall of the mounting cylinder top via a flange, and a feed hopper connected to the outer wall of the cylinder cover top via a flange. A forming assembly is located inside the mounting cylinder, including a ring die with a spiral guide groove inside. A rotating assembly is located inside the feed hopper, including a main shaft with an air inlet groove on its upper outer wall. The system comprises several stirring tubes welded to the upper outer wall of the main shaft, several connecting rods respectively fixed to the outer walls of the stirring tubes, spiral blades welded to the middle outer wall of the main shaft, a connecting block welded to the bottom of the main shaft, two mounting shafts respectively welded to the outer walls of the connecting block, and two pressure rollers, each with several hemispherical grooves on its outer wall. The stirring tubes are connected to air inlets. A transmission assembly is mounted on the mounting frame. A pre-compression assembly is located at the bottom of the feed hopper. The pre-compression assembly includes four components respectively bolted to the feed hopper. The base includes a fixed rod on the outer wall of the bottom, an extrusion plate slidably sleeved on the outer wall of the four fixed rods, a guide cone welded to the top outer wall of the extrusion plate, four return springs respectively sleeved on the lower outer wall of the four fixed rods, and a fixing ring bolted to the bottom outer wall of the four fixed rods. The top of the base is equipped with a collection mechanism, which includes a collection tank with a mounting groove on one side, a mounting plate welded to the inner wall of one side of the collection tank, two fans bolted to the bottom outer wall of the mounting plate, and a top outer wall bolted to the collection tank. The system includes a box cover, a collection box that is slidably fitted into the mounting groove, and a circulation pump that is bolted to the outer wall of one side of the collection box. A purification component is provided on one side of the collection box, and a heat exchange component is provided inside the collection box. The heat exchange component includes several heat exchange plates that penetrate and are fitted onto the inner wall of one side of the collection box, and several "L"-shaped heat dissipation fins that are welded to one end of several heat exchange plates. An air guide hood is fixed on the bottom outer wall of the box cover, and a return pipe is fixed on the top inner wall of the air guide hood. The top end of the return pipe is connected to the upper inner wall of the air inlet groove through a rotary joint.
[0006] Preferably, a fixing plate is welded to the inner wall of the middle part of the mounting frame, and the mounting cylinder passes through and is fixed to the outer wall of the fixing plate. A humidity sensor and a temperature sensor are installed in the feed hopper.
[0007] Preferably, the ring mold is bolted to the inner wall of the bottom of the mounting cylinder, a connecting pipe is fixed on the inner wall of the top of the guide channel, and the connecting pipe is connected to the liquid inlet pipe through a flexible hose. One end of the liquid inlet pipe passes through and is fixed on the inner wall of one side of the mounting cylinder, and a liquid outlet pipe is fixed on the inner wall of the bottom of the guide channel.
[0008] Preferably, a driven gear is connected to the upper outer wall of the main shaft by a pin, two mounting rings are fixed on the upper outer wall of the main shaft, and one end of several connecting rods is welded to the outer wall of the two mounting rings respectively, and the two pressure rollers are respectively connected to the outer walls of the two mounting shafts by bearings.
[0009] Preferably, the transmission assembly includes a geared motor bolted to the top outer wall of the mounting bracket and a drive gear connected to the lower outer wall of the output shaft of the geared motor via a flat key. The drive gear and the driven gear mesh with each other to form a transmission engagement.
[0010] Preferably, the outer wall of the extrusion plate has four circumferentially distributed leakage holes, the guide cone is slidably sleeved on the lower inner wall of the feed hopper and the guide cone is slidably sleeved on the outer wall of the main shaft, and the top and bottom ends of the four reset springs respectively abut against the outer wall of the extrusion plate and the fixing ring on opposite sides.
[0011] Preferably, the collection tank is bolted to the top outer wall of the base, and several support plates are welded to the bottom inner wall of the collection tank below the mounting groove. A partition is welded to the inner wall of the collection tank, and one side of the mounting plate is welded to the outer wall of the partition. The circulation pump is connected to the inside of the collection tank through a hose, and one end of the circulation pump is connected to the outer wall of the inlet pipe through a delivery hose.
[0012] Preferably, the purification component includes a mounting frame welded to the lower outer wall of one side of the collection tank, a zeolite molecular sieve embedded in the mounting frame, and a filter screen embedded in the mounting frame.
[0013] Preferably, the bottom of several heat sinks abuts against the inner wall of the bottom of the liquid collection tank, and several heat sinks abut against the outer wall of the top of the partition. A connecting plate is bolted to one outer wall of the liquid collection tank, and the connecting plate is welded to the outer wall of one end of several heat sinks respectively.
[0014] The beneficial effects of this invention are as follows: 1. The spiral coolant channel inside the ring die efficiently absorbs the heat of extrusion friction, and the heat sink in the storage tank recovers the sensible heat of the high-temperature particles. These two waste heats are converted into hot air through heat exchange plates and sent back to the feed hopper for preheating and drying of the raw materials. This forms a closed-loop system that reduces heat loss during production, reduces dependence on external drying equipment, and significantly reduces overall energy consumption. It can recover the heat generated during friction and the heat in the high-temperature particles, and use the recovered heat for preheating and drying of the raw materials.
[0015] 2. The combination of spiral blades, return springs, and extrusion plates forms a dense and uniform material plug, effectively expelling air from the material. This not only makes the subsequent main pressing process more stable and efficient, reducing the load and energy consumption fluctuations of the main motor, but its intermittent pushing action also prevents the material from "bridging" and clogging at the discharge port, ensuring the stability of continuous production. The adjustable spring preload design also enhances the adaptability to different materials, enabling pre-compression of the raw materials during feeding to remove air from the raw materials and prevent the material from becoming loose and causing the biomass fuel pellets to become scattered.
[0016] In summary, this invention can recover the heat generated during friction and the heat in the high-temperature particles, and use the recovered heat for preheating and drying of raw materials. It can also pre-compress the raw materials during feeding to remove air from the materials and prevent the materials from becoming loose and causing the biomass fuel particles to become scattered. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall main structure of the wood chip-based biomass fuel compression pelletizer proposed in this invention.
[0018] Figure 2 This is a schematic diagram of the front cross-sectional structure of the wood chip-based biomass fuel compression pelletizer proposed in this invention.
[0019] Figure 3 The present invention proposes Figure 2 Enlarged structural diagram at point A in the middle.
[0020] Figure 4 This is a front cross-sectional view of the installation mechanism of the wood chip-based biomass fuel compression pelletizer proposed in this invention.
[0021] Figure 5 This is a schematic diagram of the main structure of the molding component of the wood chip-based biomass fuel compression pelletizer proposed in this invention.
[0022] Figure 6 This is a schematic diagram of the main structure of the rotating component of the wood chip-based biomass fuel compression pelletizer proposed in this invention.
[0023] Figure 7 This is a schematic diagram of the main structure of the transmission component of the wood chip-based biomass fuel compression pelletizer proposed in this invention.
[0024] Figure 8 This is a schematic diagram of the main structure of the pre-compression component of the wood chip-based biomass fuel compression pelletizer proposed in this invention.
[0025] Figure 9 This is a front cross-sectional view of the collection mechanism of the wood chip-based biomass fuel compression pelletizer proposed in this invention.
[0026] Figure 10 This is a side view of the collection mechanism of the wood chip-based biomass fuel compression pellet mill proposed in this invention.
[0027] Figure 11 The present invention proposes Figure 9 Enlarged structural diagram at point B.
[0028] Figure 12 This is a schematic diagram of the main structure of the heat exchange component of the wood chip-based biomass fuel compression pelletizer proposed in this invention.
[0029] In the diagram: 1. Base; 2. Mounting mechanism; 201. Mounting bracket; 202. Fixing plate; 203. Mounting cylinder; 204. Cylinder cover; 205. Feed hopper; 3. Molding assembly; 301. Ring die; 302. Liquid inlet pipe; 303. Liquid outlet pipe; 4. Rotating assembly; 401. Main shaft; 402. Driven gear; 403. Stirring tube; 404. Connecting rod; 405. Spiral blade; 406. Connecting block; 407. Mounting shaft; 408. Pressure roller; 5. Transmission assembly; 501. Gear motor; 502. Drive gear; 6. Preheating... Compression assembly; 601, fixing rod; 602, extrusion plate; 603, guide cone; 604, return spring; 605, fixing ring; 7, collection mechanism; 701, liquid collection tank; 702, partition plate; 703, mounting plate; 704, fan; 705, tank cover; 706, collection box; 707, circulating pump; 8, purification assembly; 801, mounting frame; 802, zeolite molecular sieve; 803, filter screen; 9, heat exchange assembly; 901, heat exchange plate; 902, heat sink; 903, connecting plate; 10, air guide hood; 11, return pipe. Detailed Implementation
[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0031] Example 1, referring to Figure 1-5A biomass fuel compression pellet mill based on wood chips includes a base 1. A mounting mechanism 2 is located on the top of the base 1. The mounting mechanism 2 includes a mounting frame 201 welded to the outer wall of the top of the base 1, a mounting cylinder 203 with a discharge port at the bottom, a cylinder cover 204 connected to the outer wall of the top of the mounting cylinder 203 via a flange, and a feed hopper 205 connected to the outer wall of the top of the cylinder cover 204 via a flange. A fixing plate 202 is welded to the inner wall of the middle section of the mounting frame 201. The mounting cylinder 203 passes through and is fixed to the outer wall of the fixing plate 202. A humidity sensor and a temperature sensor are installed inside the feed hopper 205. Humidity and temperature sensors can monitor the humidity of sawdust in the feed hopper in real time and adjust the hot air delivery volume and temperature accordingly to achieve intelligent pre-drying. The installation cylinder 203 is equipped with a molding component 3, which includes a ring mold 301 with a spiral guide groove inside. The ring mold 301 is bolted to the inner wall of the bottom of the installation cylinder 203. A connecting pipe is fixed on the inner wall of the top of the guide groove. The connecting pipe is connected to a liquid inlet pipe 302 through a hose. One end of the liquid inlet pipe 302 passes through and is fixed on the inner wall of one side of the installation cylinder 203. A liquid outlet pipe 303 is fixed on the inner wall of the bottom of the guide groove.
[0032] Example 2, refer to Figure 6-7 The wood chip-based biomass fuel compression pellet mill also includes a rotating assembly 4. The rotating assembly 4 includes a main shaft 401 with an air inlet groove on its upper outer wall, several stirring tubes 403 welded to the upper outer wall of the main shaft 401, several connecting rods 404 respectively fixed to the outer walls of the stirring tubes 403, spiral blades 405 welded to the middle outer wall of the main shaft 401, a connecting block 406 welded to the bottom end of the main shaft 401, two mounting shafts 407 respectively welded to the outer walls on both sides of the connecting block 406, and two pressure rollers 408, each with several hemispherical grooves on its outer wall. The stirring tubes 403 are connected to the air inlet groove... The main shaft 401 is connected to the upper outer wall via a pin, and two mounting rings are fixed on the upper outer wall of the main shaft 401. Several connecting rods 404 are welded to the outer walls of the two mounting rings at one end. Two pressure rollers 408 are connected to the outer walls of the two mounting shafts 407 via bearings. The mounting frame 201 is equipped with a transmission assembly 5, which includes a geared motor 501 bolted to the top outer wall of the mounting frame 201 and a drive gear 502 connected to the lower outer wall of the output shaft of the geared motor 501 via a key. The drive gear 502 and the driven gear 402 mesh with each other to form a transmission engagement.
[0033] Example 3, referring to Figure 8The wood chip-based biomass fuel compression pellet mill also includes a pre-compression assembly 6. The pre-compression assembly 6 includes four fixing rods 601 that are bolted to the bottom outer wall of the feed hopper 205, an extrusion plate 602 that is slidably sleeved on the outer wall of the four fixing rods 601, a guide cone 603 welded to the top outer wall of the extrusion plate 602, four return springs 604 that are respectively sleeved on the lower outer wall of the four fixing rods 601, and a fixing ring 605 that is bolted to the bottom outer wall of the four fixing rods 601. The extrusion plate 602 has four circumferentially distributed leakage holes on its outer wall. The guide cone 603 is slidably sleeved on the lower inner wall of the feed hopper 205 and on the outer wall of the main shaft 401. The top and bottom ends of the four return springs 604 abut against the outer walls of the extrusion plate 602 and the fixing ring 605 on opposite sides, respectively.
[0034] Example 4, refer to Figure 9-12 The wood chip-based biomass fuel compression pellet mill also includes a collection mechanism 7. The collection mechanism 7 includes a liquid collection tank 701 with a mounting groove on one side, a mounting plate 703 welded to the inner wall of one side of the liquid collection tank 701, two fans 704 bolted to the bottom outer wall of the mounting plate 703, a cover 705 bolted to the top outer wall of the liquid collection tank 701, a collection box 706 slidably fitted into the mounting groove, and a circulation pump 70 bolted to the outer wall of one side of the liquid collection tank 701. 7. The collection tank 701 is bolted to the top outer wall of the base 1. Several support plates are welded to the bottom inner wall of the collection tank 701 below the mounting groove. A partition 702 is welded to the inner wall of the collection tank 701. One side of the mounting plate 703 is welded to the outer wall of the partition 702. The circulation pump 707 is connected to the inside of the collection tank 701 through a hose. One end of the circulation pump 707 is connected to the outer wall of one end of the inlet pipe 302 through a delivery hose. A purification component 8 is provided on one side of the collection tank 701. The purification component 8 includes... The fan 704 includes a mounting frame 801 welded to the lower outer wall of one side of the collection tank 701, a zeolite molecular sieve 802 embedded in the mounting frame 801, and a filter screen 803 embedded in the mounting frame 801, used to prevent dust and moisture in the outside air from affecting the fan 704. The collection tank 701 is equipped with a heat exchange assembly 9, which includes several heat exchange plates 901 that penetrate and are sleeved on one side of the inner wall of the collection tank 706, and several "L"-shaped heat sinks 9 respectively welded to one end of the heat exchange plates 901. 02. Several heat sinks 902 are abutted against the bottom inner wall of the liquid collection tank 701. Several heat sinks 902 are abutted against the top outer wall of the partition 702. A connecting plate 903 is bolted to one outer wall of the liquid collection tank 701. The connecting plate 903 is welded to one end of the outer wall of several heat sinks 902. An air guide shroud 10 is fixed on the bottom outer wall of the box cover 705. A return pipe 11 is fixed on the top inner wall of the air guide shroud 10. The top end of the return pipe 11 is connected to the upper inner wall of the air inlet slot through a rotary joint.
[0035] At startup, external drying equipment dries the wood chips. The raw material is fed into the mounting cylinder 203 via the feed hopper 205. The geared motor 501 drives the main shaft 401 to rotate. The spiral blades 405 on the main shaft 401 convey the material to the lower part of the feed hopper 205. The extrusion plate 602 blocks the wood chips, while the spiral blades 405 continuously convey them, causing the wood chips to be compressed above the extrusion plate 602. When the pressure on the extrusion plate 602 exceeds the tension of the return spring 604, the guide cone 603 guides the wood chips, allowing them to evenly enter the mounting cylinder 201 through the discharge holes on the extrusion plate 602. The main shaft 401 drives two mounting shafts 407 and two pressure rollers 408 to rotate. The two pressure rollers 408 revolve around the main shaft 401 while simultaneously moving along... Two mounting shafts 407 rotate to extrude and granulate the raw material on the ring die 301. At this time, the circulating pump 707 delivers the coolant in the liquid collection tank 701 to the liquid inlet pipe 302. The coolant flows in the spiral guide groove in the ring die 301 to recover the heat on the ring die 301. The high-temperature coolant enters the liquid collection tank 701 to exchange heat with the heat sink 902. The high-temperature particles exchange heat with the heat exchange plate 901 in the material collection box 706. The heat exchange plate 901 transfers heat to the heat sink 902. Two sets of fans operate to deliver the heat from the heat sink 902 to the air guide shroud 10. The hot air is delivered to the air inlet groove on the main shaft 401 through the return pipe 11. Then the hot air enters the stirring pipe 403. The stirring pipe 403 stirs the wood chips while preheating and drying them.
[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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 limitations on this invention.
[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A wood chip-based biomass fuel compression pellet mill, comprising a base (1), characterized in that, The base (1) is provided with an installation mechanism (2) on the top. The installation mechanism (2) includes an installation bracket (201) welded to the outer wall of the top of the base (1), an installation cylinder (203) with a discharge port at the bottom, a cylinder cover (204) connected to the outer wall of the top of the installation cylinder (203) by a flange, and a feed hopper (205) connected to the outer wall of the top of the cylinder cover (204) by a flange. The mounting cylinder (203) is provided with a molding component (3), which includes a ring mold (301) with a spiral guide groove inside. The feed hopper (205) is provided with a rotating assembly (4). The rotating assembly (4) includes a main shaft (401) with an air inlet groove on its upper outer wall, several stirring tubes (403) welded to the upper outer wall of the main shaft (401), several connecting rods (404) respectively fixed to the outer walls of the stirring tubes (403), spiral blades (405) welded to the middle outer wall of the main shaft (401), connecting blocks (406) welded to the bottom end of the main shaft (401), two mounting shafts (407) respectively welded to the outer walls on both sides of the connecting blocks (406), and two pressure rollers (408) with several hemispherical grooves on their outer walls. The stirring tubes (403) are respectively connected to the air inlet groove. The mounting bracket (201) is provided with a transmission assembly (5); The bottom end of the feed hopper (205) is provided with a pre-compression assembly (6). The pre-compression assembly (6) includes four fixing rods (601) that are respectively bolted to the outer wall of the bottom of the feed hopper (205), an extrusion plate (602) that is slidably sleeved on the outer wall of the four fixing rods (601), a guide cone (603) welded to the outer wall of the top of the extrusion plate (602), four return springs (604) that are respectively sleeved on the lower outer wall of the four fixing rods (601), and a fixing ring (605) that is bolted to the outer wall of the bottom end of the four fixing rods (601). The base (1) is provided with a collection mechanism (7) on the top. The collection mechanism (7) includes a liquid collection tank (701) with an installation groove on one side, an installation plate (703) welded to the inner wall of one side of the liquid collection tank (701), two fans (704) respectively bolted to the bottom outer wall of the installation plate (703), a box cover (705) bolted to the top outer wall of the liquid collection tank (701), a material collection box (706) slidably sleeved in the installation groove, and a circulation pump (707) bolted to the outer wall of one side of the liquid collection tank (701). The liquid collection tank (701) is equipped with a purification component (8) on one side; The liquid collection tank (701) is provided with a heat exchange assembly (9), which includes a number of heat exchange plates (901) that penetrate and are sleeved on one side of the inner wall of the collection tank (706) and a number of "L"-shaped heat sinks (902) that are respectively welded to one end of the number of heat exchange plates (901). The bottom outer wall of the box cover (705) is fixedly provided with an air guide hood (10), and the top inner wall of the air guide hood (10) is fixedly provided with a return pipe (11). The top end of the return pipe (11) is connected to the upper inner wall of the air inlet groove through a rotary joint.
2. The wood chip-based biomass fuel compression pelletizer according to claim 1, characterized in that, A fixing plate (202) is welded to the inner wall of the middle part of the mounting frame (201), and the mounting cylinder (203) passes through and is fixed to the outer wall of the fixing plate (202). A humidity sensor and a temperature sensor are installed in the feed hopper (205).
3. The wood chip-based biomass fuel compression pelletizer according to claim 1, characterized in that, The ring mold (301) is bolted to the inner wall of the bottom of the mounting cylinder (203). A connecting pipe is fixed on the inner wall of the top of the guide channel, and the connecting pipe is connected to the liquid inlet pipe (302) through a flexible hose. One end of the liquid inlet pipe (302) passes through and is fixed on the inner wall of one side of the mounting cylinder (203). A liquid outlet pipe (303) is fixed on the inner wall of the bottom of the guide channel.
4. The wood chip-based biomass fuel compression pelletizer according to claim 1, characterized in that, A driven gear (402) is connected to the upper outer wall of the main shaft (401) by a pin. Two mounting rings are fixed on the upper outer wall of the main shaft (401), and one end of several connecting rods (404) is welded to the outer wall of the two mounting rings respectively. The two pressure rollers (408) are respectively connected to the outer wall of the two mounting shafts (407) by bearings.
5. The wood chip-based biomass fuel compression pelletizer according to claim 4, characterized in that, The transmission assembly (5) includes a geared motor (501) bolted to the top outer wall of the mounting bracket (201) and a drive gear (502) connected to the lower outer wall of the output shaft of the geared motor (501) by a key. The drive gear (502) and the driven gear (402) mesh with each other to form a transmission engagement.
6. The wood chip-based biomass fuel compression pelletizer according to claim 1, characterized in that, The extrusion plate (602) has four circumferentially distributed leakage holes on its outer wall. The guide cone (603) is slidably sleeved on the lower inner wall of the feed hopper (205) and slidably sleeved on the outer wall of the main shaft (401). The top and bottom ends of the four reset springs (604) respectively abut against the outer walls of the extrusion plate (602) and the fixing ring (605) on opposite sides.
7. The wood chip-based biomass fuel compression pelletizer according to claim 3, characterized in that, The collection tank (701) is bolted to the top outer wall of the base (1), and several support plates are welded to the bottom inner wall of the collection tank (701) below the mounting groove. A partition (702) is welded to the inner wall of the collection tank (701), and the mounting plate (703) is welded to the partition (702) on one side and the outer wall on the other side. The circulation pump (707) is connected to the inside of the collection tank (701) through a hose, and one end of the circulation pump (707) is connected to the outer wall of one end of the inlet pipe (302) through a delivery hose.
8. The wood chip-based biomass fuel compression pelletizer according to claim 1, characterized in that, The purification component (8) includes a mounting frame (801) welded to the lower outer wall of one side of the collection tank (701), a zeolite molecular sieve (802) embedded in the mounting frame (801), and a filter screen (803) embedded in the mounting frame (801).
9. The wood chip-based biomass fuel compression pelletizer according to claim 7, characterized in that, The bottom of several heat sinks (902) abuts against the inner wall of the bottom of the liquid collection tank (701), and several heat sinks (902) abut against the outer wall of the top of the partition (702). A connecting plate (903) is bolted to one side of the outer wall of the liquid collection tank (701), and the connecting plate (903) is welded to one end of the outer wall of several heat sinks (902).