A cooling and solidification apparatus for processing biomass energy fuel pellets

Abstract

This invention discloses a cooling and solidification device for processing biomass fuel pellets, comprising a base, a reducer and a first motor fixedly mounted on the top of the base, and a cleaning component fixedly mounted on the top of the reducer. The output end of the first motor is connected to the cleaning component via the reducer. This invention relates to the field of biomass dense molding fuel processing technology. In this cooling and solidification device, cold air from the air supply chamber enters the air guide ring assembly through an opening. The circulating airflow exchanges heat with the high-temperature pellets. After cooling and solidification, the airflow flows with the pellets towards the discharge port and is finally discharged from the equipment, carrying away a small amount of debris from the pellet surface. The air guide ring assembly is directly fixed to the molding die, and the cold air path perfectly matches the discharge path of the molded pellets. The cooling process and the molding process are synchronized, eliminating the need for additional pellet transfer and improving the continuous operation efficiency of the equipment.

Description

Technical Field

[0001] This invention relates to the field of biomass compacted fuel processing technology, specifically to a cooling and solidification device for processing biomass fuel pellets. Background Technology

[0002] Biomass fuel pellets, as a clean and renewable new energy source, have become an important alternative to traditional fossil fuels due to their advantages such as wide availability of raw materials, high combustion efficiency, and low pollutant emissions. They are widely used in industrial heating, residential heating, and biomass power generation, and the market's requirements for their processing efficiency and finished product quality are constantly increasing. Cooling and solidification is the core process in biomass fuel pellet processing. Freshly extruded biomass pellets are hot and have a loose structure. If they cannot be cooled and solidified quickly and uniformly, they are prone to cracking, deformation, and clumping. This not only reduces the hardness, density, and combustion performance of the finished pellets but also affects subsequent storage, transportation, and use. Therefore, dedicated cooling and solidification equipment has become an indispensable key device in biomass pellet processing production lines.

[0003] Currently, existing cooling and solidification equipment for biomass fuel pellet processing still suffers from numerous technical shortcomings in practical applications. In some equipment, the forming components and cooling structures are independent, requiring the formed pellets to be transported before entering the cooling stage. During transport, the pellets are easily damaged by collisions, and the uneven heat dissipation of the high-temperature pellets significantly reduces subsequent cooling efficiency. Furthermore, traditional equipment often employs single-sided or direct-blowing cooling methods, resulting in dispersed and undirected cold air, which can easily lead to insufficient or excessive cooling in certain areas, causing pellet cracking and deformation. Summary of the Invention

[0004] To solve the above technical problems, the present invention is achieved through the following technical solution: a cooling and solidification device for processing biomass fuel pellets, comprising: a base, a reducer and a first motor respectively fixedly installed on the top of the base, a cleaning component fixedly installed on the top of the reducer, and the output end of the first motor being connected to the cleaning component through the reducer; A cooling component is fixedly installed on the top of the cleaning component. A feed inlet is threadedly installed in the middle of the top of the cooling component. A second motor is fixedly installed on the side of the top of the cooling component. A discharge outlet is fixedly installed on the surface of the cooling component near the second motor. A forming component is provided inside the cavity of the cooling component. The forming component is connected to the output end of the second motor via a coupling. The cooling assembly includes a cooling chamber with a cover plate fixedly installed on its top. A connecting pipe is threaded onto the side of the top of the cover plate, and an air supply chamber is formed between the connecting pipe and the cooling chamber. An air guide ring assembly is fixedly installed on the surface of the air supply chamber. The cover plate, fixed to the top of the cooling chamber, seals the air supply chamber and provides mounting support for the feed inlet and the second motor. The connecting pipe is connected to a cooler via an external pipe. The cool air generated by the cooler is delivered to the air supply chamber through the connecting pipe. The cool air in the air supply chamber enters the air guide ring assembly through an opening, where it circulates and exchanges heat with the high-temperature particles. After cooling and solidification, the airflow flows with the particles towards the discharge port and is finally discharged from the equipment, carrying away a small amount of debris from the particle surface. The air guide ring assembly is directly fixed to the mold, and the cold air path perfectly matches the discharge path of the formed particles. The cooling process and the forming process are synchronized, eliminating the need for additional particle transfer and improving the continuous operation efficiency of the equipment.

[0005] Preferably, the connecting pipe is connected to the air cooler via a pipe, the molding component is driven and installed in the middle of the cooling chamber, and the air guide ring is sleeved on the outer surface of the molding component.

[0006] Preferably, the air guide ring assembly includes connecting plates, and two connecting plates are provided. Both connecting plates are fixedly installed on the surface of the air supply cavity. A curved ring is fixedly installed on the surface of the connecting plate. The curved ring is sleeved on the outer surface of the forming component, and an air guide wall is formed between the curved ring and the forming component. The cold air first contacts the connecting plates of the air guide ring assembly and is guided to the air guide wall between the curved ring and the die. The curved ring wraps around the outside of the die, so that the cold air forms a surrounding airflow along the air guide wall, which fully covers the high-temperature fuel particles that have just been formed on the outside of the die. The curved ring and the air guide wall of the air guide ring assembly form a wrapping air path, so that the cold air is concentrated on the high-temperature particle area, reducing the cold air dispersion loss. At the same time, the flow path of the surrounding airflow is long, and the heat exchange time with the particles is sufficient. The cold air can cover all particles on the outside of the die without dead angles, avoiding particle cracking and deformation caused by insufficient local cooling, and greatly improving the appearance and structural integrity of the finished particles.

[0007] Preferably, the molding assembly includes a mounting ring, a pressure mold is fixedly mounted on the bottom of the mounting ring, and a pressure roller is driven inside the pressure mold. The mounting ring is fixed in the middle position inside the cooling cavity, serving as a support structure for the pressure mold. The top of the pressure mold is connected to the mounting ring, while its outer side is fixed to the curved ring of the cooling assembly, forming a stable molding cavity.

[0008] Preferably, the mounting ring is fixedly installed in the middle of the cooling cavity, the pressure mold is fixedly connected to the curved ring, the pressure roller is driven to the output end of the second motor through a coupling, and the pressure roller is adapted to the pressure mold.

[0009] Preferably, the pressure roller component includes a main shaft, on the surface of which a cross-shaped protective cover is fixedly mounted. Shafts are rotatably mounted on both sides of the bottom of the cross-shaped protective cover, and saw gears are fixedly mounted on the outer surface of the shafts. Power from the second motor is transmitted to the main shaft of the pressure roller component via a coupling, causing the main shaft to rotate within the cooling chamber. As the main shaft rotates, the cross-shaped protective cover on its surface rotates synchronously, and the shafts at the bottom of the cross-shaped protective cover rotate accordingly, thereby causing the saw gears on the outer surface of the shafts to rotate within the internal cavity of the mold. The two saw gears mesh with each other. When biomass raw material falls from the feed inlet into the gap between the mold and the saw gears, the meshing saw gears squeeze the raw material towards the mold hole. After being squeezed, the raw material passes through the mold hole, forming cylindrical fuel particles, and is discharged from the outside of the mold. The cross-shaped protective cover covers the top of the saw gears, preventing raw material debris from entering the rotation gap of the shafts, reducing component wear, and preventing raw material from splashing during the forming process, thus ensuring the cleanliness of the cooling chamber.

[0010] Preferably, the main shaft is connected to the output end of the second motor via a coupling, and the saw gears are rotatably mounted inside the die via a shaft, with the saw gears meshing properly. The pressure roller adopts a double saw gear meshing structure, which, combined with the precise die holes of the die, ensures uniform force on the raw material during extrusion, resulting in highly consistent particle diameter and length after forming, avoiding the particle deformation problem that is prone to occur in traditional single pressure roller structures. The tooth shape design and meshing transmission method of the saw gears can be adapted to biomass raw materials of different hardness. Softer raw materials can be formed by the extrusion force of the meshing gap, while harder raw materials can be pelletized by the combined shearing and extrusion action of the saw gears, thus broadening the application range.

[0011] Preferably, the cleaning assembly includes a bearing housing, which is fixedly installed at the bottom of the cooling chamber. The bearing inside the bearing housing is connected to the first motor via a reducer. A rotating seat is rotatably installed on the top of the bearing housing, and a scraper is fixedly installed on the top of the rotating seat. The bearing housing of the cleaning assembly is fixedly installed at the bottom of the cooling chamber of the cooling assembly, providing basic support for the operation of the assembly. After the equipment starts the cleaning program, the first motor outputs power, which is transmitted to the bearing inside the bearing housing after being speed-adjusted and torque-increased by the reducer, thus completing the precise input and transmission connection of power and ensuring stable rotation speed during the cleaning operation. When the bearing inside the bearing housing rotates, it directly drives the rotating seat mounted on its top to perform a circumferential rotation, which in turn drives the scraper to rotate in a ring around the outside of the mold of the forming assembly.

[0012] Preferably, the scraper includes a fixing block, and a mounting plate is fixedly installed on the top of the fixing block. A trapezoidal scraper head and a protective extension block are respectively provided on both sides of the outer surface of the mounting plate. During the rotation of the scraper around the die, the trapezoidal scraper head maintains frictional fit with the outer side of the die, directly scraping and peeling off residual fuel particles that are not discharged in time from the outer side of the die, achieving precise cleaning. The scraper is mounted on the rotating base surface via four circumferentially distributed fixing blocks, driving the trapezoidal scraper head to rotate in a ring around the die. The trapezoidal scraper head adopts a trapezoidal structure adapted to the outer side of the die, resulting in surface contact friction with the die, rather than point or line contact. This ensures uniform scraping force and avoids damage to the die or scraper head due to excessive localized force.

[0013] Preferably, four fixing blocks are provided, arranged in a circumferential shape on the surface of the rotary base. The trapezoidal scraper head is rotatably mounted on the outside of the mold via the rotary base, and the trapezoidal scraper head is frictionally adapted to the mold. The residual particles scraped off by the trapezoidal scraper head move towards the discharge port of the cooling component under the combined action of their own gravity and the airflow inside the equipment, and are finally discharged from the equipment from the discharge port together with the cooled and solidified finished particles, achieving a seamless connection between cleaning and discharge.

[0014] This invention provides a cooling and solidification device for processing biomass fuel pellets. It has the following beneficial effects: (i) The cooling and solidification equipment for processing biomass fuel pellets uses two meshing saw gears. When the biomass raw material falls from the feed inlet into the gap between the die and the saw gears, the meshing saw gears squeeze the raw material towards the die hole. After being squeezed, the raw material passes through the die hole, forming cylindrical fuel pellets, which are then discharged from the outside of the die. A cross-shaped protective cover covers the top of the saw gears, preventing raw material debris from entering the rotation gap of the shaft, reducing component wear, and preventing raw material from splashing during the forming process, thus ensuring the cleanliness of the cooling chamber.

[0015] (II) The cooling and solidification equipment for processing biomass fuel pellets utilizes a double saw gear meshing structure in the pressure rollers, combined with precise die holes. This ensures uniform stress on the raw materials during extrusion, resulting in highly consistent pellet diameter and length after forming, thus avoiding pellet deformation problems common in traditional single-pressure roller structures. The saw gear tooth design and meshing transmission method are adaptable to biomass raw materials of varying hardness. Softer raw materials can be formed through the extrusion force of the meshing gap, while harder raw materials can be pelletized through a combination of shearing and extrusion actions of the saw gears, thus broadening its applicability.

[0016] (III) The cooling and solidification equipment for biomass fuel pellet processing uses a cooler to deliver cold air to the air supply chamber via a connecting pipe. The cold air in the air supply chamber enters the air guide ring assembly through an opening, where it circulates and exchanges heat with the high-temperature pellets. After cooling and solidification, the airflow flows with the pellets towards the discharge port and is finally discharged from the equipment, carrying away a small amount of debris from the pellet surface. The air guide ring assembly is directly fixed to the mold, and the cold air path perfectly matches the discharge path of the formed pellets. The cooling process and the forming process are carried out simultaneously, eliminating the need for additional pellet transfer and improving the continuous operation efficiency of the equipment.

[0017] (iv) The cooling and solidification equipment for processing biomass fuel pellets forms an enveloping airflow path through the curved ring and airflow wall of the air guide ring group, so that the cold air is concentrated on the high-temperature pellet area, reducing the cold air dispersion loss. At the same time, the flow path of the surrounding airflow is long, and the heat exchange time with the pellets is sufficient. The cold air can cover all the pellets outside the mold without dead angles, avoiding pellet cracking and deformation caused by insufficient local cooling, and greatly improving the appearance and structural integrity of the finished pellets.

[0018] (v) The cooling and solidification equipment for processing biomass fuel pellets has a scraper mounted on the surface of the rotating base by four fixed blocks arranged in a circular pattern, which drives the platform scraper to rotate around the die. The platform scraper adopts a platform structure that is compatible with the outer side of the die, and the scraper has surface contact friction with the die, rather than point contact or line contact. This ensures the uniformity of scraping force and avoids damage to the die or scraper caused by excessive local force. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle; Figure 3 This is a schematic cross-sectional view of the feed inlet of the present invention; Figure 4 This is a schematic cross-sectional view of the internal structure of the cooling component of the present invention; Figure 5 This is a cross-sectional view of the disassembled cooling assembly of the present invention; Figure 6 This is an enlarged structural schematic diagram of invention A; Figure 7 This is a schematic diagram of the molding component and cleaning component of the present invention; Figure 8 This is a schematic diagram of the disassembled structure of the pressure roller component of the present invention; Figure 9 This is a schematic diagram of the cleaning component and air guide ring assembly of the present invention; Figure 10 This is a schematic diagram of the scraper component of the present invention.

[0020] In the diagram: 1. Base; 2. First motor; 3. Cooling assembly; 31. Connecting pipe; 32. Cover plate; 33. Air supply chamber; 34. Cooling chamber; 35. Air guide ring assembly; 351. Connecting piece; 352. Air guide wall; 353. Curved ring; 4. Inlet; 5. Second motor; 6. Outlet; 7. Reducer; 8. Cleaning assembly; 81. Rotary seat; 82. Bearing chamber; 83. Scraper; 831. Mounting plate; 832. Fixing block; 833. Protective extension block; 834. Table-shaped scraper head; 9. Forming assembly; 91. Press mold; 92. Press roller; 921. Main shaft; 922. Shaft; 923. Cross protective cover; 924. Saw gear; 93. Mounting ring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] First embodiment, such as Figures 1 to 10 As shown, the present invention provides a technical solution: a cooling and solidification device for processing biomass energy fuel pellets, comprising: a base 1, a reducer 7 and a first motor 2 respectively fixedly installed on the top of the base 1, a cleaning component 8 fixedly installed on the top of the reducer 7, and the output end of the first motor 2 being connected to the cleaning component 8 through the reducer 7. A cooling component 3 is fixedly installed on the top of the cleaning component 8. A feed inlet 4 is threadedly installed in the middle of the top of the cooling component 3. A second motor 5 is fixedly installed on the side of the top of the cooling component 3. A discharge outlet 6 is fixedly installed on the surface of the cooling component 3 near the second motor 5. A forming component 9 is provided inside the cavity of the cooling component 3. The forming component 9 is connected to the output end of the second motor 5 through a coupling. The cooling assembly 3 includes a cooling chamber 34, with a cover plate 32 fixedly installed on the top of the cooling chamber 34. A connecting pipe 31 is threaded onto the side of the top of the cover plate 32. An air supply chamber 33 is formed between the connecting pipe 31 and the cooling chamber 34. An air guide ring assembly 35 is fixedly installed on the surface of the air supply chamber 33. The cover plate 32 is fixed to the top of the cooling chamber 34, sealing the air supply chamber 33 and providing installation support for the feed inlet 4 and the second motor 5. The connecting pipe 31 is connected to a cold air blower through an external pipe. The cold air generated by the cold air blower is delivered to the air supply chamber 33 through the connecting pipe 31. The cold air in the air supply chamber 33 enters the air guide ring assembly 35 through the opening, and the airflow exchanges heat with the high-temperature particles. After cooling and solidification, the airflow flows with the particles toward the discharge port 6 and is finally discharged from the equipment from the discharge port 6, while carrying away a small amount of debris from the surface of the particles. The air guide ring assembly 35 is directly fixed to the mold 91, and the cold air path is perfectly matched with the discharge path of the formed particles. The cooling process is carried out synchronously with the forming process, eliminating the need for additional particle transfer and improving the continuous operation efficiency of the equipment.

[0023] The connecting pipe 31 is connected to the air cooler through a pipe, the molding component 9 is installed in the middle of the cooling chamber 34, and the air guide ring 35 is sleeved on the outer surface of the molding component 9.

[0024] The air guide ring assembly 35 includes a connecting piece 351. Two connecting pieces 351 are provided. Both connecting pieces 351 are fixedly installed on the surface of the air supply cavity 33. A curved ring 353 is fixedly installed on the surface of the connecting piece 351. The curved ring 353 is sleeved on the outer surface of the forming component 9, and an air guide wall 352 is formed between the curved ring 353 and the forming component 9.

[0025] The cold air first contacts the connecting piece 351 of the air guide ring assembly 35 and is guided to the air guide wall 352 between the curved ring 353 and the die 91. The curved ring 353 wraps around the outside of the die 91, causing the cold air to form a surrounding airflow along the air guide wall 352, fully covering the newly formed high-temperature fuel pellets on the outside of the die 91. The curved ring 353 and the air guide wall 352 of the air guide ring assembly 35 form a wrapping airflow path, which concentrates the cold air on the high-temperature pellet area, reducing cold air dispersion loss. At the same time, the long flow path of the surrounding airflow provides sufficient heat exchange time with the pellets. The cold air can cover all the pellets on the outside of the die 91 without dead angles, avoiding pellet cracking and deformation caused by insufficient local cooling, and greatly improving the appearance and structural integrity of the finished pellets.

[0026] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 7 to 8As shown, the molding assembly 9 includes a mounting ring 93, with a pressure mold 91 fixedly mounted on the bottom of the mounting ring 93. A pressure roller 92 is installed inside the pressure mold 91. The mounting ring 93 is fixed in the middle position inside the cooling cavity 34, serving as a support structure for the pressure mold 91. The top of the pressure mold 91 is connected to the mounting ring 93, while its outer side is fixed to the curved ring 353 of the cooling assembly 3, forming a stable molding cavity.

[0027] The mounting ring 93 is fixedly installed in the middle of the cooling cavity 34. The pressure mold 91 is fixedly connected to the curved ring 353. The pressure roller 92 is connected to the output end of the second motor 5 through a coupling, and the pressure roller 92 is compatible with the pressure mold 91.

[0028] The pressure roller component 92 includes a main shaft 921. A cross-shaped protective cover 923 is fixedly mounted on the surface of the main shaft 921. Shafts 922 are rotatably mounted on both sides of the bottom of the cross-shaped protective cover 923. A saw gear 924 is fixedly mounted on the outer surface of the shaft 922. The power of the second motor 5 is transmitted to the main shaft 921 of the pressure roller component 92 through a coupling, driving the main shaft 921 to rotate in the cooling chamber 34. When the main shaft 921 rotates, it synchronously drives the cross-shaped protective cover 923 on its surface to rotate. The shaft 922 at the bottom of the cross-shaped protective cover 923 rotates together, thereby driving the saw gear 924 on the outer surface of the shaft 922 to rotate in the internal cavity of the pressure mold 91. Two sawing gears 924 mesh with each other. When biomass feedstock falls from the feed inlet 4 into the gap between the die 91 and the sawing gears 924, the meshing sawing gears 924 squeeze the feedstock towards the die hole of the die 91. After being squeezed, the feedstock passes through the die hole, forming cylindrical fuel pellets, and is discharged from the outside of the die 91. A cross-shaped protective cover 923 covers the top of the sawing gears 924, which can prevent feedstock debris from entering the rotation gap of the shaft 922, reduce component wear, and prevent feedstock from splashing during the molding process, ensuring the cleanliness of the inside of the cooling chamber 34.

[0029] The main shaft 921 is connected to the output end of the second motor 5 via a coupling. The saw gears 924 are rotatably mounted inside the compression mold 91 via shaft 922, and the saw gears 924 mesh with each other. The compression roller 92 adopts a double saw gear 924 meshing structure, which, combined with the precise die holes of the compression mold 91, ensures uniform force on the raw material during extrusion, resulting in consistent particle diameter and length after forming, avoiding the particle deformation problem that is prone to occur in traditional single compression roller structures. The tooth shape design and meshing transmission method of the saw gears 924 can be adapted to biomass raw materials of different hardness. Softer raw materials can be formed by the extrusion force of the meshing gap, while harder raw materials can be pelletized by the combined shearing and extrusion action of the saw gears 924, thus broadening the application range.

[0030] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figures 9 to 10As shown, the cleaning assembly 8 includes a bearing chamber 82, which is fixedly installed at the bottom of the cooling chamber 34. The bearing inside the bearing chamber 82 is connected to the first motor 2 via a reducer 7. A rotating base 81 is rotatably mounted on the top of the bearing chamber 82, and a scraper 83 is fixedly mounted on the top of the rotating base 81. The bearing chamber 82 of the cleaning assembly 8 is fixedly installed at the bottom of the cooling chamber 34 of the cooling assembly 3, providing basic support for the operation of the assembly. After the equipment starts the cleaning program, the first motor 2 outputs power, which is transmitted to the bearing inside the bearing chamber 82 after being speed-adjusted and torque-increased by the reducer 7, thus completing the precise input and transmission connection of power and ensuring the stable rotation speed of the cleaning operation. When the bearing inside the bearing chamber 82 rotates, it directly drives the rotating base 81 mounted on its top to perform a circular rotation, which in turn drives the scraper 83 to rotate in a ring around the outside of the mold 91 of the forming assembly 9.

[0031] The scraper component 83 includes a fixing block 832, on the top of which a mounting plate 831 is fixedly installed. A trapezoidal scraper head 834 and a protective extension block 833 are respectively provided on both sides of the outer surface of the mounting plate 831. During the rotation of the scraper component 83 around the mold 91, the trapezoidal scraper head 834 maintains frictional fit with the outer side of the mold 91, directly scraping and peeling off residual fuel particles that are not discharged in time from the outer side of the mold 91, achieving precise cleaning. The scraper component 83 is mounted on the surface of the rotating base 81 via four circumferentially distributed fixing blocks 832, driving the trapezoidal scraper head 834 to rotate in a ring around the mold 91. The trapezoidal scraper head 834 adopts a trapezoidal structure adapted to the outer side of the mold 91, resulting in surface contact friction with the mold 91 rather than point or line contact. This ensures uniform scraping force and avoids damage to the mold 91 or scraper head due to excessive localized force.

[0032] Four fixing blocks 832 are provided, and the four fixing blocks 832 are distributed in a circumferential shape on the surface of the rotating base 81. The trapezoidal scraper head 834 is rotatably mounted on the outside of the pressing mold 91 through the rotating base 81, and the trapezoidal scraper head 834 is frictionally adapted to the pressing mold 91. The residual particles scraped off by the trapezoidal scraper head 834 move towards the discharge port 6 of the cooling component 3 under the combined action of its own gravity and the airflow inside the equipment, and are finally discharged from the equipment from the discharge port 6 together with the cooled and solidified finished particles, realizing a seamless connection between cleaning and discharge.

[0033] In use, the mounting ring 93 is fixed in the middle position inside the cooling cavity 34 as a support structure for the mold 91. The top of the mold 91 is connected to the mounting ring 93, and its outer side is fixed to the curved ring 353 of the cooling assembly 3 to form a stable molding cavity.

[0034] The power of the second motor 5 is transmitted to the main shaft 921 of the pressure roller 92 via a coupling, causing the main shaft 921 to rotate within the cooling chamber 34. As the main shaft 921 rotates, it synchronously rotates the cross-shaped protective cover 923 on its surface. The shaft 922 at the bottom of the cross-shaped protective cover 923 rotates along with it, thereby causing the saw gears 924 on the outer surface of the shaft 922 to rotate within the internal cavity of the mold 91. The two saw gears 924 mesh with each other. When biomass raw material falls from the feed port 4 into the gap between the mold 91 and the saw gears 924, the meshing saw gears 924 squeeze the raw material towards the die hole of the mold 91. After being squeezed, the raw material passes through the die hole, forming cylindrical fuel pellets, which are then discharged from the outside of the mold 91. The cross-shaped protective cover 923 covers the top of the saw gears 924, preventing raw material debris from entering the rotation gap of the shaft 922, reducing component wear, and preventing raw material from splashing during the molding process, thus ensuring the cleanliness of the cooling chamber 34.

[0035] The pressure roller 92 employs a double saw gear 924 meshing structure, which, combined with the precise die holes of the pressure mold 91, ensures uniform force on the raw material during extrusion, resulting in highly consistent particle diameter and length after forming. This avoids the particle deformation problems that are prone to occur in traditional single pressure roller structures. The tooth profile design and meshing transmission method of the saw gear 924 can adapt to biomass raw materials of different hardness. Softer raw materials can be formed through the extrusion force of the meshing gap, while harder raw materials can be pelletized through the combined shearing and extrusion action of the saw gear 924, thus broadening its applicability.

[0036] The cover plate 32 is fixed to the top of the cooling chamber 34, sealing the air supply chamber 33 and providing installation support for the feed inlet 4 and the second motor 5. The connecting pipe 31 is connected to the air cooler through an external pipe. The cold air generated by the air cooler is delivered to the air supply chamber 33 through the connecting pipe 31. The cold air in the air supply chamber 33 enters the air guide ring assembly 35 through the opening. The airflow and the high-temperature particles exchange heat. After cooling and solidification, the airflow flows with the particles to the discharge port 6 and is finally discharged from the equipment from the discharge port 6, while carrying away a small amount of debris from the particle surface. The air guide ring assembly 35 is directly fixed to the mold 91. The cold air path is perfectly matched with the discharge path of the formed particles. The cooling process and the forming process are carried out simultaneously, eliminating the need for additional particle transfer and improving the continuous operation efficiency of the equipment.

[0037] The cold air first contacts the connecting piece 351 of the air guide ring assembly 35 and is guided to the air guide wall 352 between the curved ring 353 and the die 91. The curved ring 353 wraps around the outside of the die 91, causing the cold air to form a surrounding airflow along the air guide wall 352, fully covering the newly formed high-temperature fuel pellets on the outside of the die 91. The curved ring 353 and the air guide wall 352 of the air guide ring assembly 35 form a wrapping airflow path, which concentrates the cold air on the high-temperature pellet area, reducing cold air dispersion loss. At the same time, the long flow path of the surrounding airflow provides sufficient heat exchange time with the pellets. The cold air can cover all the pellets on the outside of the die 91 without dead angles, avoiding pellet cracking and deformation caused by insufficient local cooling, and greatly improving the appearance and structural integrity of the finished pellets.

[0038] The bearing chamber 82 of the cleaning component 8 is fixedly installed at the bottom of the cooling cavity 34 of the cooling component 3, providing basic support for the operation of the component. After the equipment starts the cleaning program, the first motor 2 outputs power, which is then transmitted to the bearing inside the bearing chamber 82 after being adjusted and increased in torque by the reducer 7. This completes the precise input and transmission connection of power, ensuring stable rotation speed during the cleaning operation. When the bearing inside the bearing chamber 82 rotates, it directly drives the rotating seat 81 mounted on its top to rotate in a circular motion, which in turn drives the scraper 83 to rotate in a ring around the outside of the mold 91 of the forming component 9.

[0039] During the rotation of the scraper component 83 around the die 91, the trapezoidal scraper head 834 maintains frictional fit with the outer side of the die 91, directly scraping and peeling off residual fuel particles that are not discharged in time and adhering to the outer side of the die 91, thus completing precise cleaning. The scraper component 83 is mounted on the surface of the rotating base 81 through four circumferentially distributed fixing blocks 832, which drive the trapezoidal scraper head 834 to rotate in a ring around the die 91. The trapezoidal scraper head 834 adopts a trapezoidal structure that fits the outer side of the die 91, and has surface contact friction with the die 91, rather than point contact or line contact. This ensures the uniformity of scraping force and avoids damage to the die 91 or scraper head caused by excessive local force.

[0040] The residual particles scraped off by the platform scraper 834 move towards the discharge port 6 of the cooling component 3 under the combined action of their own gravity and the airflow inside the equipment. Finally, they are discharged from the equipment from the discharge port 6 together with the cooled and solidified finished particles, achieving a seamless connection between cleaning and discharge.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling and solidification device for processing biomass fuel pellets, characterized in that, include: The base (1) is fixedly mounted with a reducer (7) and a first motor (2) on its top. The top of the reducer (7) is fixedly mounted with a cleaning component (8). The output end of the first motor (2) is connected to the cleaning component (8) through the reducer (7). A cooling component (3) is fixedly installed on the top of the cleaning component (8). A feed inlet (4) is threadedly installed in the middle of the top of the cooling component (3). A second motor (5) is fixedly installed on the side of the top of the cooling component (3). A discharge port (6) is fixedly installed on the surface of the cooling component (3) near the second motor (5). A forming component (9) is provided inside the cavity of the cooling component (3). The forming component (9) is connected to the output end of the second motor (5) through a coupling. The cooling assembly (3) includes a cooling chamber (34), a cover plate (32) is fixedly installed on the top of the cooling chamber (34), a connecting pipe (31) is threaded on the side of the top of the cover plate (32), an air supply chamber (33) is opened between the connecting pipe (31) and the cooling chamber (34), and an air guide ring assembly (35) is fixedly installed on the surface of the air supply chamber (33).

2. The cooling and solidification equipment for processing biomass fuel pellets according to claim 1, characterized in that: The connecting pipe (31) is connected to the air cooler through a pipe, the molding component (9) is installed in the middle of the cooling chamber (34), and the air guide ring (35) is sleeved on the outer surface of the molding component (9).

3. The cooling and solidification equipment for processing biomass fuel pellets according to claim 2, characterized in that: The air guide ring assembly (35) includes a connecting piece (351), and there are two connecting pieces (351). Both connecting pieces (351) are fixedly installed on the surface of the air supply cavity (33). A curved ring (353) is fixedly installed on the surface of the connecting piece (351). The curved ring (353) is sleeved on the outer surface of the molding component (9), and an air guide wall (352) is formed between the curved ring (353) and the molding component (9).

4. The cooling and solidification equipment for processing biomass fuel pellets according to claim 1, characterized in that: The molding component (9) includes a mounting ring (93), a pressure mold (91) is fixedly mounted on the bottom of the mounting ring (93), and a pressure roller (92) is installed inside the pressure mold (91).

5. The cooling and solidification equipment for processing biomass fuel pellets according to claim 4, characterized in that: The mounting ring (93) is fixedly installed in the middle of the cooling cavity (34). The mold (91) is fixedly connected to the curved ring (353). The pressure roller (92) is connected to the output end of the second motor (5) through a coupling. The pressure roller (92) is compatible with the mold (91).

6. The cooling and solidification equipment for processing biomass fuel pellets according to claim 5, characterized in that: The pressure roller component (92) includes a main shaft (921), a cross protective cover (923) is fixedly installed on the surface of the main shaft (921), and a shaft (922) is rotatably installed on both sides of the bottom of the cross protective cover (923). A saw gear (924) is fixedly installed on the outer surface of the shaft (922).

7. The cooling and solidification equipment for processing biomass fuel pellets according to claim 6, characterized in that: The main shaft (921) is connected to the output end of the second motor (5) via a coupling. The saw gear (924) is rotatably mounted inside the mold (91) via a shaft (922), and the saw gears (924) mesh with each other.

8. The cooling and solidification equipment for processing biomass fuel pellets according to claim 1, characterized in that: The cleaning assembly (8) includes a bearing chamber (82), which is fixedly installed at the bottom of the cooling chamber (34). The bearing inside the bearing chamber (82) is connected to the first motor (2) via a reducer (7). A rotatable seat (81) is rotatably installed on the top of the bearing chamber (82), and a scraper (83) is fixedly installed on the top of the rotatable seat (81).

9. The cooling and solidification equipment for processing biomass fuel pellets according to claim 8, characterized in that: The scraper (83) includes a fixing block (832), and a mounting plate (831) is fixedly installed on the top of the fixing block (832). A table-shaped scraper head (834) and a protective extension block (833) are respectively provided on both sides of the outer surface of the mounting plate (831).

10. A cooling and solidification device for processing biomass fuel pellets according to claim 9, characterized in that: Four fixing blocks (832) are provided, and the four fixing blocks (832) are distributed in a circumferential shape on the surface of the rotating base (81). The trapezoidal scraper (834) is rotatably installed on the outside of the mold (91) through the rotating base (81), and the trapezoidal scraper (834) is frictionally adapted to the mold (91).

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