A drying apparatus and method for biomass pellet production

Abstract

This invention relates to the field of drying technology and discloses a drying device and method for biomass pellet production, which solves the problem of insufficient utilization of heat in moisture, resulting in resource waste. It includes a base, a drying chamber on top of the base, a tilting mechanism for driving the drying chamber to tilt, a sealing cover at the top of the drying chamber with an air outlet pipe, a lifting component for driving the sealing cover to rise and fall on the base, a drying unit on the sealing cover, a gas collecting box inside the drying chamber, a support ring rotatably connected to the top of the gas collecting box and fixedly connected to the drying chamber, and a first air inlet pipe fixedly connected to the bottom of the gas collecting box, the bottom end of the first air inlet pipe rotatably connected to the bottom inner wall of the drying chamber. It eliminates the need to directly discharge moisture outdoors, avoiding heat loss, improving energy utilization, and facilitating practical use.

Description

Technical Field

[0001] This invention belongs to the field of drying technology, specifically a drying device and method for biomass pellet production. Background Technology

[0002] Biomass pellet fuel is a block-shaped, environmentally friendly new energy source produced through processing of straw, rice straw, rice husks, peanut shells, corn cobs, camellia husks, cottonseed husks, and other "three wastes" (residue, waste materials, and solid waste). The production process of biomass pellets requires the use of drying equipment to dry them, thereby maximizing the utilization of the biomass pellets and extending their shelf life.

[0003] However, it is worth considering that existing drying devices have high humidity inside the drying chamber during the drying process. While the drying efficiency is improved by directly expelling the moisture from the drying chamber, the heat in the moisture is directly released outdoors, which does not make full use of the heat in the moisture, resulting in a waste of resources and making it difficult to promote its use.

[0004] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a drying device and method for biomass pellet production, which effectively solves the problem of not being able to fully utilize the heat in the moisture, resulting in resource waste.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drying device for biomass pellet production, comprising a base, a drying chamber above the base, a flipping mechanism for driving the drying chamber to flip, a sealing cover at the top of the drying chamber, an air outlet pipe on the sealing cover, a lifting component for driving the sealing cover to rise and fall on the base, a drying unit on the sealing cover, a gas collecting box inside the drying chamber, a support ring rotatably connected to the top of the gas collecting box, and the support ring and the drying chamber being fixedly connected, a first air inlet pipe fixedly connected to the bottom of the gas collecting box, the bottom end of the first air inlet pipe being rotatably connected to the bottom inner wall of the drying chamber, a second air inlet pipe adapted to the first air inlet pipe fixedly connected to the bottom of the drying chamber, an air inlet hole adapted to the second air inlet pipe being opened on the bottom inner wall of the drying chamber, and an air outlet stirring structure installed in the gas collecting box.

[0007] Preferably, the gas outlet stirring structure includes at least two support pipes rotatably mounted on the top of the gas collection box, with the bottom end of the support pipe located inside the gas collection box. Several exhaust plates located above the support ring are fixedly installed on the support pipes. The exhaust plates have cavities adapted to the support pipes. Several exhaust ports are opened on the inner wall of the cavities of the exhaust plates. Filter screens are fixedly connected inside the exhaust ports. Several first stirring blades located above the support ring are fixedly installed on the support pipes. The drying box is equipped with a driving component adapted to the first air inlet pipe and a transmission unit adapted to the support pipes.

[0008] Preferably, the driving component includes a first sprocket fixedly sleeved outside the first air inlet pipe, a servo motor fixedly connected to the bottom of the drying chamber, a second sprocket located inside the drying chamber fixedly connected to the output end of the servo motor, and the second sprocket and the first sprocket connected by a chain.

[0009] Preferably, the transmission unit includes a first support frame fixedly installed on the inner wall of the bottom of the drying chamber, and a first air inlet pipe sleeved on the outside of the first support frame. A first gear ring located inside the air collection box is fixedly sleeved on the outside of the first support frame, and a first gear located inside the air collection box is fixedly sleeved on the bottom end of the support pipe, and the first gear and the first gear ring mesh with each other.

[0010] Preferably, the lifting component includes a fixed frame fixedly installed on the top of the base, and a first hydraulic telescopic rod is fixedly installed on the fixed frame. The telescopic end of the first hydraulic telescopic rod is fixedly connected to the top of the sealing cover.

[0011] Preferably, the drying unit includes a vent cover disposed within a sealing cover, and the vent cover is a cavity structure with an open top. The vent cover has several vent holes. The sealing cover is fitted with a disassembly / removal component adapted to the vent cover. A control box is fixedly connected to the bottom of the vent cover. At least two first rotating shafts are rotatably connected to the control box. Several second stirring blades are fixedly connected to the first rotating shafts, and the second stirring blades are located above the vent cover. A second support frame is rotatably connected inside the control box. A second gear ring is fixedly sleeved on the outside of the second support frame. A second gear meshing with the second gear ring is fixedly connected to the bottom end of the first rotating shaft. A first damping disc located below the control box is fixedly connected to the bottom end of the second support frame. A support column is fixedly connected to the top of the air collection box. A sliding groove is formed at the top of the support column. A first prism is provided in the sliding groove. The bottom end of the first prism and the bottom inner wall of the sliding groove are connected by a compression spring. A second damping disc in contact with the bottom of the first damping disc is fixedly connected to the top of the first prism.

[0012] Preferably, the disassembly component includes two piston plates fixedly installed inside the vent cover. The top of the piston plate passes through the sealing cover, and an insert plate located above the sealing cover passes through the piston plate. Support plates are respectively fitted at both ends of the insert plate, and the bottom of the support plate is fixedly connected to the top of the sealing cover. A first stop plate and a second stop plate are respectively provided at both ends of the insert plate. The first stop plate is fixedly connected to the sealing cover, and the second stop plate is fixedly connected to the fixing frame through a connecting frame.

[0013] Preferably, the flipping mechanism includes support boxes respectively disposed on both sides of the drying oven, the support boxes and the base are fixedly connected, a second rotating shaft is rotatably connected to the support box, and the second rotating shaft is fixedly connected to the drying oven, a second hydraulic telescopic rod is fixedly installed on the support box, the telescopic end of the second hydraulic telescopic rod is fixedly connected to a toothed plate located inside the support box, and a third gear located inside the support box is fixedly installed on the second rotating shaft, and the third gear meshes with the toothed plate.

[0014] Preferably, the bottom of the toothed plate is provided with a guide groove, and a second prism is slidably provided in the guide groove, and the bottom of the second prism is fixedly connected to the bottom inner wall of the support box.

[0015] The present invention also provides a drying method for biomass pellet production, using the drying apparatus for biomass pellet production as described above, comprising the following steps:

[0016] Step 1: The exhaust pipe and the second intake pipe are connected to the input and output ends of the external gas heating device through hoses, respectively. The external gas heating device inputs heated air into the gas collection box through the second intake pipe and the first intake pipe.

[0017] Step 2: The heated gas is introduced into the drying chamber through the gas outlet stirring structure, and the gas outlet stirring structure stirs the biomass pellets in the drying chamber. The hot air containing moisture is dried by the drying unit on the drying chamber.

[0018] Step 3: The dried hot air flows back to the external gas heating device through the outlet pipe and hose. The external gas heating device heats the gas to the preset temperature, and the heated air enters the second inlet pipe through the hose again.

[0019] Step 4: After the biomass pellets have finished drying, the sealing cover is moved upward by the lifting mechanism, and then the drying box is flipped by the flipping mechanism to pour out the biomass pellets inside the drying box, thus completing the feeding process.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] Heated gas is introduced into the drying chamber through an exhaust stirring structure, which agitates the biomass pellets inside. The hot air containing moisture is dried by the drying unit on the drying chamber. The dried hot air then flows back to the external gas heating device through the exhaust pipe and hose. The external gas heating device heats the gas to a preset temperature. The heated air then enters the second intake pipe through the hose again. During the drying process, moisture in the air can be collected, eliminating the need to directly discharge moisture outdoors, thus avoiding heat loss, improving energy utilization, and facilitating practical use. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0023] In the attached diagram:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the sealing cap of the present invention;

[0026] Figure 3 This is a schematic diagram of the bottom structure of the control box of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the drying oven of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the first air intake pipe of the present invention;

[0029] Figure 6 This is a schematic diagram of the disassembly and assembly of the first prism and the support column of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure at the bottom of the support tube of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal structure of the support box of the present invention;

[0032] Figure 9 This is a schematic diagram of the bottom structure of the toothed plate of the present invention.

[0033] In the diagram: 1. Base; 2. Drying oven; 3. Sealing cover; 4. Air outlet pipe; 5. Air collection box; 6. Support ring; 7. First air inlet pipe; 8. Second air inlet pipe; 9. Air inlet hole; 10. Support pipe; 11. Exhaust plate; 12. Filter screen; 13. First sprocket; 14. Servo motor; 15. Second sprocket; 16. Chain; 17. First gear; 18. First support frame; 19. First gear ring; 20. First stirring blade; 21. Fixing frame; 22. First hydraulic telescopic rod; 23. Vent cover; 24. First rotating shaft; 25. Second... 26. Stirring blade; 27. Control box; 28. Second support frame; 29. ​​Second gear; 30. Second gear ring; 31. First damping disc; 32. Support column; 33. Second damping disc; 34. First prism; 35. Slide groove; 36. Compression spring; 37. Piston plate; 38. Support plate; 39. Insert plate; 40. First stop plate; 41. Second stop plate; 42. Connecting frame; 43. Second rotating shaft; 44. Support box; 45. Third gear; 46. Second hydraulic telescopic rod; 47. Gear plate; 48. Second prism; 49. Guide groove. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] Example 1, by Figure 1 , Figure 4 and Figure 5The present invention includes a base 1, a drying chamber 2 on top of the base 1, a flipping mechanism for driving the drying chamber 2 to flip, a sealing cover 3 at the top of the drying chamber 2, an air outlet pipe 4 on the sealing cover 3, a lifting component for driving the sealing cover 3 to rise and fall on the base 1, a drying unit on the sealing cover 3, a gas collecting box 5 inside the drying chamber 2, a support ring 6 rotatably connected to the top of the gas collecting box 5, and the support ring 6 fixedly connected to the drying chamber 2, a first air inlet pipe 7 fixedly connected to the bottom of the gas collecting box 5, the bottom end of the first air inlet pipe 7 rotatably connected to the bottom inner wall of the drying chamber 2, a second air inlet pipe 8 adapted to the first air inlet pipe 7 fixedly connected to the bottom of the drying chamber 2, and an opening in the bottom inner wall of the drying chamber 2. An air inlet 9 is adapted to the second air inlet pipe 8, and an air collection box 5 is equipped with an exhaust stirring structure. The heated gas is introduced into the drying box 2 through the exhaust stirring structure, which stirs the biomass pellets in the drying box 2. The hot air containing moisture is dried by the drying unit on the drying box 2. The dried hot air flows back to the external gas heating device through the exhaust pipe 4 and the hose. The external gas heating device heats the gas to a preset temperature. The heated air then enters the second air inlet pipe 8 through the hose again. During the drying process, the moisture in the air can be collected, eliminating the need to directly discharge the moisture outdoors, avoiding heat loss, improving energy utilization, and facilitating practical use.

[0036] Example 2, based on Example 1, is... Figure 4 , Figure 5 and Figure 7 The exhaust stirring structure includes at least two support pipes 10 rotatably mounted on the top of the gas collection box 5, with the bottom end of the support pipe 10 located inside the gas collection box 5. Several exhaust vanes 11 are fixedly installed on the support pipes 10 above the support ring 6. Each exhaust vane 11 has a cavity adapted to the support pipe 10, and several exhaust ports are opened on the inner wall of the cavity. A filter screen 12 is fixedly connected to each exhaust port. Several first stirring blades 20 are fixedly installed on the support pipes 10 above the support ring 6. The drying chamber 2 is equipped with a drive unit adapted to the first air inlet pipe 7, and a transmission unit adapted to the support pipes 10. The drive unit includes a fixed... A first sprocket 13 is sleeved on the outside of the first air inlet pipe 7. A servo motor 14 is fixedly connected to the bottom of the drying chamber 2. The output end of the servo motor 14 is fixedly connected to a second sprocket 15 located inside the drying chamber 2. The second sprocket 15 and the first sprocket 13 are connected by a chain 16. The transmission unit includes a first support frame 18 fixedly installed on the inner wall of the bottom of the drying chamber 2. The first air inlet pipe 7 is sleeved on the outside of the first support frame 18. A first gear ring 19 located inside the air collection box 5 is fixedly sleeved on the outside of the first support frame 18. A first gear 17 located inside the air collection box 5 is fixedly sleeved on the bottom end of the support pipe 10. The first gear 17 and the first gear ring 19 mesh with each other.

[0037] An external gas heating device inputs heated air into the gas collection box 5 through the second air inlet pipe 8 and the first air inlet pipe 7. The hot air enters the exhaust plate 11 through the support pipe 10 and is discharged into the drying chamber 2 through the exhaust port on the exhaust plate 11. The design of the filter screen 12 prevents biomass pellets from entering the exhaust plate 11 through the exhaust port. The second sprocket 15 is driven to rotate by the servo motor 14. The second sprocket 15 drives the first sprocket 13 and the first air inlet pipe 7 to rotate through the chain 16. The first air inlet pipe 7 drives the gas collection box 5 to rotate relative to the support ring 6 and the drying chamber 2, changing the position of the support pipe 10 in the drying chamber 2. The gas collection box 5 drives the first gear 17 to roll on the first gear ring 19 through the support pipe 10, so that the support pipe 10 rotates relative to the gas collection box 5. The support pipe 10 drives the exhaust plate 11 and the first stirring blade 20 to rotate, stirring the biomass pellets in the drying chamber 2. At the same time, the position of the exhaust port on the exhaust plate 11 is changed so that the hot air dries the biomass pellets at different positions in the drying chamber 2.

[0038] Example 3, based on Example 1, is... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6The lifting unit includes a fixed frame 21 fixedly installed on the top of the base 1. A first hydraulic telescopic rod 22 is fixedly installed on the fixed frame 21. The telescopic end of the first hydraulic telescopic rod 22 is fixedly connected to the top of the sealing cover 3. The drying unit includes a vent cover 23 disposed inside the sealing cover 3. The vent cover 23 is a cavity structure with an open top. Several vent holes are provided on the vent cover 23. The sealing cover 3 is equipped with a disassembly and assembly part adapted to the vent cover 23. A control box 26 is fixedly connected to the bottom of the vent cover 23. At least two first rotating shafts 24 are rotatably connected to the control box 26. Several second stirring blades 25 are fixedly connected to the first rotating shafts 24, and the second stirring blades 25 are located above the vent cover 23. A second support frame 27 is rotatably connected inside the control box 26. A second gear ring 29 is fixedly sleeved on the outside of the second support frame 27. A second gear 28 that meshes with the second gear ring 29 is fixedly connected to the bottom end of the first rotating shafts 24. The bottom end of the second support frame 27... A first damping disc 30 is fixedly connected below the control box 26. A support column 31 is fixedly connected to the top of the air collection box 5. A slide groove 34 is opened on the top of the support column 31. A first prism 33 is provided in the slide groove 34. The bottom end of the first prism 33 and the bottom inner wall of the slide groove 34 are connected by a compression spring 35. A second damping disc 32 that contacts the bottom of the first damping disc 30 is fixedly connected to the top of the first prism 33. The disassembly and assembly parts include two piston plates 36 fixedly installed in the vent cover 23. The top end of the piston plate 36 passes through the sealing cover 3. An insert plate 38 located above the sealing cover 3 passes through the piston plate 36. Support plates 37 are respectively sleeved on both ends of the insert plate 38. The bottom of the support plate 37 and the top of the sealing cover 3 are fixedly connected. A first stop plate 39 and a second stop plate 40 are respectively provided on both ends of the insert plate 38. The first stop plate 39 and the sealing cover 3 are fixedly connected. The second stop plate 40 and the fixing frame 21 are fixedly connected by a connecting frame 41.

[0039] A desiccant is placed inside the vent cover 23. Moisture enters the vent cover 23 through the vent holes and is absorbed by the desiccant. Meanwhile, the compression spring 35 is compressed, applying pressure to the first prism 33 and the second damping disc 32 to ensure they are in close contact. As the air collection box 5 rotates, it drives the second damping disc 32 to rotate via the support column 31 and the first prism 33. The second damping disc 32, through friction, drives the first damping disc 30 and the second support frame 27 to rotate synchronously. The second support frame 27 drives the second gear 28 to rotate via the second gear ring 29. The second gear 28 drives the second stirring blade 25 to rotate via the first rotating shaft 24. The second stirring blade 25 stirs the desiccant inside the vent cover 23, changing its position and ensuring even moisture absorption at different locations within the vent cover 23. When the desiccant needs to be replaced... The sealing cover 3 is driven upward by the first hydraulic telescopic rod 22, and the sealing cover 3 is no longer in contact with the top of the drying chamber 2. The sealing cover 3 drives the insert plate 38, piston plate 36 and vent cover 23 to move upward synchronously through the support plate 37. The position of the insert plate 38 is limited by the first stop plate 39 and the second stop plate 40 to prevent the insert plate 38 from disengaging from the support plate 37 and piston plate 36. When the sealing cover 3 moves to the preset height, the second stop plate 40 no longer blocks the horizontal movement of the insert plate 38. The operator drives the insert plate 38 to move away from the first stop plate 39 so that the insert plate 38 disengages from the support plate 37 and piston plate 36, thereby releasing the restriction on the position of the piston plate 36 and vent cover 23. The operator drives the piston plate 36 downward so that the vent cover 23 slides out from the sealing cover 3. Finally, the piston plate 36 disengages from the sealing cover 3, completing the removal of the vent cover 23. The operator can then replace the desiccant inside the vent cover 23.

[0040] Example 4, based on Example 1, is... Figure 1 , Figure 8 and Figure 9 The flipping mechanism includes support boxes 43 respectively disposed on both sides of the drying oven 2. The support boxes 43 are fixedly connected to the base 1. A second rotating shaft 42 is rotatably connected to the support box 43 and is fixedly connected to the drying oven 2. A second hydraulic telescopic rod 45 is fixedly installed on the support box 43. A toothed plate 46 located inside the support box 43 is fixedly connected to the telescopic end of the second hydraulic telescopic rod 45. A third gear 44 located inside the support box 43 is fixedly installed on the second rotating shaft 42 and meshes with the toothed plate 46. A guide groove 48 is opened at the bottom of the toothed plate 46. A second prism 47 is slidably disposed in the guide groove 48 and the bottom of the second prism 47 is fixedly connected to the bottom inner wall of the support box 43.

[0041] The design of the second rotating shaft 42 and the support box 43 allows the drying box 2 to be rotatably connected relative to the base 1. The toothed plate 46 is driven to move by the second hydraulic telescopic rod 45. The toothed plate 46 can then drive the third gear 44 and the second rotating shaft 42 to rotate. The second rotating shaft 42 can then drive the drying box 2 to flip. When the toothed plate 46 moves vertically, the toothed plate 46 and the guide groove 48 slide relative to the second prism 47. The design of the second prism 47 and the guide groove 48 reduces the possibility of the toothed plate 46 tilting and wobbling.

[0042] This embodiment provides a drying method for biomass pellet production, using the drying apparatus for biomass pellet production as described above, and includes the following steps:

[0043] Step 1: The exhaust pipe 4 and the second intake pipe 8 are connected to the input and output ends of the external gas heating device through hoses, respectively. The external gas heating device inputs heated air into the gas collection box 5 through the second intake pipe 8 and the first intake pipe 7.

[0044] Step 2: The heated gas is introduced into the drying chamber 2 through the gas outlet stirring structure, and the gas outlet stirring structure stirs the biomass particles in the drying chamber 2. The hot air with moisture is dried by the drying unit on the drying chamber 2.

[0045] Step 3: The dried hot air flows back to the external gas heating device through the outlet pipe 4 and the hose. The external gas heating device heats the gas to the preset temperature. The heated air then enters the second inlet pipe 8 through the hose again.

[0046] Step 4: After the biomass pellets are dried, the sealing cover 3 is moved upward by the lifting component, and then the drying box 2 is flipped by the flipping mechanism to pour out the biomass pellets in the drying box 2, thus completing the feeding process.

[0047] Working principle: During operation, the exhaust pipe 4 and the second intake pipe 8 are connected to the input and output ends of an external gas heating device via flexible hoses, respectively. The external gas heating device introduces heated air into the gas collection box 5 through the second intake pipe 8 and the first intake pipe 7. The heated gas is then introduced into the drying chamber 2 through the exhaust stirring structure, which stirs the biomass pellets in the drying chamber 2. The hot air containing moisture is dried by the drying unit on the drying chamber 2. The dried hot air then flows back to the external gas heating device through the exhaust pipe 4 and the flexible hose. The external gas heating device heats the gas to a preset temperature. The heated air then enters the second intake pipe 8 through the flexible hose again. After the biomass pellets are dried, the sealing cover 3 is moved upward by the lifting component, and then the drying chamber 2 is flipped by the flipping mechanism to pour out the biomass pellets in the drying chamber 2, thus completing the unloading process. During the drying process, the moisture in the air can be collected, eliminating the need to directly discharge the moisture outdoors, avoiding heat loss, improving energy utilization, and facilitating practical use.

[0048] An external gas heating device inputs heated air into the gas collection box 5 through the second air inlet pipe 8 and the first air inlet pipe 7. The hot air enters the exhaust plate 11 through the support pipe 10 and is discharged into the drying chamber 2 through the exhaust port on the exhaust plate 11. The design of the filter screen 12 prevents biomass pellets from entering the exhaust plate 11 through the exhaust port. The second sprocket 15 is driven to rotate by the servo motor 14. The second sprocket 15 drives the first sprocket 13 and the first air inlet pipe 7 to rotate through the chain 16. The first air inlet pipe 7 drives the gas collection box 5 to rotate relative to the support ring 6 and the drying chamber 2, changing the position of the support pipe 10 in the drying chamber 2. The gas collection box 5 drives the first gear 17 to roll on the first gear ring 19 through the support pipe 10, so that the support pipe 10 rotates relative to the gas collection box 5. The support pipe 10 drives the exhaust plate 11 and the first stirring blade 20 to rotate, stirring the biomass pellets in the drying chamber 2. At the same time, the position of the exhaust port on the exhaust plate 11 is changed so that the hot air dries the biomass pellets at different positions in the drying chamber 2.

[0049] A desiccant is placed inside the vent cover 23. Moisture enters the vent cover 23 through the vent holes and is absorbed by the desiccant. Meanwhile, the compression spring 35 is compressed, applying pressure to the first prism 33 and the second damping disc 32 to ensure they are in close contact. As the air collection box 5 rotates, it drives the second damping disc 32 to rotate via the support column 31 and the first prism 33. The second damping disc 32, through friction, drives the first damping disc 30 and the second support frame 27 to rotate synchronously. The second support frame 27 drives the second gear 28 to rotate via the second gear ring 29. The second gear 28 drives the second stirring blade 25 to rotate via the first rotating shaft 24. The second stirring blade 25 stirs the desiccant inside the vent cover 23, changing its position and ensuring even moisture absorption at different locations within the vent cover 23. When the desiccant needs to be replaced... The sealing cover 3 is driven to move upward by the first hydraulic telescopic rod 22, and the sealing cover 3 is no longer in contact with the top of the drying box 2. The sealing cover 3 drives the insert plate 38, piston plate 36 and vent cover 23 to move upward synchronously through the support plate 37. The position of the insert plate 38 is limited by the first stop plate 39 and the second stop plate 40 to prevent the insert plate 38 from disengaging from the support plate 37 and piston plate 36. When the sealing cover 3 moves to the preset height, the second stop plate 40 no longer blocks the horizontal movement of the insert plate 38. The operator drives the insert plate 38 to move away from the first stop plate 39 so that the insert plate 38 disengages from the support plate 37 and piston plate 36, thereby releasing the restriction on the position of the piston plate 36 and vent cover 23. The operator drives the piston plate 36 to move downward so that the vent cover 23 slides out from the sealing cover 3. Finally, the piston plate 36 disengages from the sealing cover 3, completing the removal of the vent cover 23. The operator can then replace the desiccant inside the vent cover 23.

[0050] The design of the second rotating shaft 42 and the support box 43 allows the drying box 2 to be rotatably connected relative to the base 1. The toothed plate 46 is driven to move by the second hydraulic telescopic rod 45. The toothed plate 46 can then drive the third gear 44 and the second rotating shaft 42 to rotate. The second rotating shaft 42 can then drive the drying box 2 to flip. When the toothed plate 46 moves vertically, the toothed plate 46 and the guide groove 48 slide relative to the second prism 47. The design of the second prism 47 and the guide groove 48 reduces the possibility of the toothed plate 46 tilting and wobbling.

[0051] 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 process, method, article, or apparatus.

[0052] 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 drying device for biomass pellet production, comprising a base (1), characterized in that: A drying chamber (2) is provided above the base (1). The base (1) is equipped with a flipping mechanism for driving the drying chamber (2) to flip. A sealing cover (3) is provided at the top of the drying chamber (2). An air outlet pipe (4) is provided on the sealing cover (3). A lifting component for driving the sealing cover (3) to rise and fall is provided on the base (1). A drying unit is provided on the sealing cover (3). A gas collection box (5) is provided inside the drying chamber (2). A support ring (6) is rotatably connected to the top of the gas collection box (5). The support ring (6) and the drying chamber (2) are fixedly connected. A first air inlet pipe (7) is fixedly connected to the bottom of the gas collection box (5). The bottom end of the first air inlet pipe (7) is rotatably connected to the bottom inner wall of the drying chamber (2). A second air inlet pipe (8) adapted to the first air inlet pipe (7) is fixedly connected to the bottom of the drying chamber (2). An air inlet hole (9) adapted to the second air inlet pipe (8) is opened on the bottom inner wall of the drying chamber (2). An air outlet stirring structure is installed in the gas collection box (5). The drying unit includes a vent cover (23) disposed inside the sealing cover (3), and the vent cover (23) is a cavity structure with an open top. The vent cover (23) has several vent holes. The sealing cover (3) is equipped with a disassembly and assembly part that is compatible with the vent cover (23). The bottom of the vent cover (23) is fixedly connected to a control box (26). At least two first rotating shafts (24) are rotatably connected to the control box (26). Several second stirring blades (25) are fixedly connected to the first rotating shafts (24), and the second stirring blades (25) are located above the vent cover (23). A second support frame (27) is rotatably connected inside the control box (26). A second gear ring (29) is fixedly sleeved on the outside of the second support frame (27). A second gear (28) that meshes with the second gear ring (29) is fixedly connected to the bottom end of the first rotating shaft (24). The driving component includes a first sprocket (13) fixedly sleeved outside the first air inlet pipe (7), a servo motor (14) fixedly connected to the bottom of the drying box (2), a second sprocket (15) fixedly connected to the output end of the servo motor (14) inside the drying box (2), the second sprocket (15) and the first sprocket (13) are connected by a chain (16), the drying box (2) is equipped with a transmission unit adapted to the support pipe (10), the transmission unit includes a first support frame (18) fixedly installed on the inner wall of the bottom of the drying box (2), and the first air inlet pipe (7) sleeved outside the first support frame (18), the first gear ring (19) fixedly sleeved outside the first support frame (18) inside the air collection box (5), the bottom end of the support pipe (10) fixedly sleeved with a first gear (17) inside the air collection box (5), and the first gear (17) and the first gear ring (19) mesh with each other.

2. The drying apparatus for biomass pellet production according to claim 1, characterized in that: The gas-discharging stirring structure includes at least two support pipes (10) rotatably mounted on the top of the gas collection box (5), and the bottom end of the support pipe (10) is located inside the gas collection box (5). The support pipe (10) is fixedly mounted with a number of exhaust plates (11) located above the support ring (6). The exhaust plates (11) have cavities adapted to the support pipe (10) and a number of exhaust ports are opened on the inner wall of the cavity of the exhaust plates (11). A filter screen (12) is fixedly connected inside the exhaust port. The support pipe (10) is fixedly mounted with a number of first stirring blades (20) located above the support ring (6). The drying box (2) is equipped with a driving component adapted to the first air inlet pipe (7).

3. The drying apparatus for biomass pellet production according to claim 1, characterized in that: The lifting component includes a fixed frame (21) fixedly installed on the top of the base (1), and a first hydraulic telescopic rod (22) fixedly installed on the fixed frame (21). The telescopic end of the first hydraulic telescopic rod (22) is fixedly connected to the top of the sealing cover (3).

4. A drying apparatus for biomass pellet production according to claim 3, characterized in that: The bottom end of the second support frame (27) is fixedly connected to the first damping disc (30) located below the control box (26). The top of the air collection box (5) is fixedly connected to the support column (31). The top of the support column (31) is provided with a sliding groove (34). The sliding groove (34) is provided with a first prism (33). The bottom end of the first prism (33) and the bottom inner wall of the sliding groove (34) are connected by a compression spring (35). The top end of the first prism (33) is fixedly connected to the second damping disc (32) that contacts the bottom of the first damping disc (30).

5. A drying apparatus for biomass pellet production according to claim 4, characterized in that: The assembly includes two piston plates (36) fixedly installed inside the vent cover (23). The top of the piston plate (36) passes through the sealing cover (3). An insert plate (38) located above the sealing cover (3) passes through the piston plate (36). Support plates (37) are respectively fitted at both ends of the insert plate (38). The bottom of the support plate (37) is fixedly connected to the top of the sealing cover (3). A first stop plate (39) and a second stop plate (40) are respectively provided at both ends of the insert plate (38). The first stop plate (39) is fixedly connected to the sealing cover (3). The second stop plate (40) and the fixing bracket (21) are fixedly connected through the connecting bracket (41).

6. A drying apparatus for biomass pellet production according to claim 1, characterized in that: The flipping mechanism includes support boxes (43) respectively disposed on both sides of the drying box (2). The support boxes (43) and the base (1) are fixedly connected. A second rotating shaft (42) is rotatably connected to the support box (43), and the second rotating shaft (42) is fixedly connected to the drying box (2). A second hydraulic telescopic rod (45) is fixedly installed on the support box (43). A toothed plate (46) located inside the support box (43) is fixedly connected to the telescopic end of the second hydraulic telescopic rod (45). A third gear (44) located inside the support box (43) is fixedly installed on the second rotating shaft (42), and the third gear (44) and the toothed plate (46) mesh with each other.

7. A drying apparatus for biomass pellet production according to claim 6, characterized in that: The bottom of the toothed plate (46) is provided with a guide groove (48), and a second prism (47) is slidably provided in the guide groove (48), and the bottom of the second prism (47) is fixedly connected to the bottom inner wall of the support box (43).

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