Drying device and method for biomass particle production

Abstract

The invention relates to the technical field of drying, and discloses a drying device and method for biomass particle production, and solves the problem that heat in moisture cannot be fully utilized to cause waste of resources. The drying device comprises a base, a drying box is arranged above the base, and a turnover mechanism used for driving the drying box to turn over is installed on the base; a sealing cover is arranged at the top end of the drying box, an air outlet pipe is arranged on the sealing cover, a lifting piece used for driving the sealing cover to ascend and descend is installed on the base, a drying unit is installed on the sealing cover, an air collecting box is arranged in the drying box, a supporting ring is rotationally connected to the top end of the air collecting box and fixedly connected with the drying box, and a first air inlet pipe is fixedly connected to the bottom of the air collecting box. The bottom end of the first air inlet pipe is rotationally connected with the bottom inner wall of the drying box. And moisture does not need to be directly discharged outdoors, heat loss is avoided, the energy utilization rate is increased, and actual use is facilitated.

Description

Technical Field

[0001] The invention belongs to the field of drying technology, and specifically relates to a drying device and method for producing biomass particles. Background Art

[0002] Biomass pellet fuel is a block-shaped environmentally friendly new energy source produced by processing straw, rice straw, rice husk, peanut shell, corn cob, tea husk, cottonseed husk and other "three wastes". In the production process of biomass pellets, a drying device is required to dry the biomass pellets, so as to maximize the utilization of biomass pellets and extend the storage period of biomass pellet fuel; However, it is worth considering that during the drying process, the humidity in the drying box of the existing drying device is relatively high. The drying efficiency is improved by directly discharging the moisture in the drying box. However, the heat in the moisture is directly discharged to the outside, which cannot fully utilize the heat in the moisture, resulting in a waste of resources and is not convenient for promotion and use.

[0003] Therefore, in order to solve the above problems, a related facility that better meets the usage requirements is needed. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a drying device and method for producing biomass pellets, which effectively solves the problem that the heat in moisture cannot be fully utilized in the above background technology, resulting in waste of resources.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drying device for producing biomass particles, comprising a base, a drying box is provided above the base, a turning mechanism for driving the drying box to turn over is installed on the base, a sealing cover is provided on the top of the drying box, an air outlet pipe is provided on the sealing cover, a lifting member for driving the sealing cover to lift and lower is installed on the base, a drying unit is installed on the sealing cover, an air collecting box is provided in the drying box, a support ring is rotatably connected to the top of the air collecting box, and the support ring and the drying box are fixedly connected, a first air inlet pipe is fixedly connected to the bottom of the air collecting box, the bottom end of the first air inlet pipe is rotatably connected to the bottom inner wall of the drying box, a second air inlet pipe matched with the first air inlet pipe is fixedly connected to the bottom of the drying box, an air inlet hole matched with the second air inlet pipe is opened on the bottom inner wall of the drying box, and an air outlet stirring structure is installed on the air collecting box.

[0006] Preferably, the air outlet stirring structure includes at least two support tubes rotatably mounted on the top of the air collecting box, and the bottom ends of the support tubes are located in the air collecting box, the support tubes are fixedly mounted with a plurality of exhaust plates located above the support ring, the exhaust plates are provided with cavities matching the support tubes, a plurality of exhaust ports are provided on the inner walls of the cavities of the exhaust plates, filters are fixedly connected in the exhaust ports, the support tubes are fixedly mounted with a plurality of first stirring blades located above the support ring, the drying box is provided with a driving member matching the first air inlet pipe, and the drying box is provided with a transmission unit matching the support tube.

[0007] Preferably, the driving member includes a first sprocket fixedly mounted on the outside of the first air inlet pipe, a servo motor is fixedly connected to the bottom of the drying box, an output end of the servo motor is fixedly connected to a second sprocket located in the drying box, and the second sprocket and the first sprocket are connected by a chain.

[0008] Preferably, the transmission unit includes a first support frame fixedly mounted on the bottom inner wall of the drying box, and the first air inlet pipe sleeve is arranged on the outside of the first support frame, the outer fixed sleeve of the first support frame is provided with a first gear ring located in the air collecting box, the bottom end fixed sleeve of the support pipe is provided with a first gear located in the air collecting box, and the first gear and the first gear ring are meshed.

[0009] Preferably, the lifting member includes a fixing frame fixedly mounted on the top of the base, a first hydraulic telescopic rod is fixedly mounted on the fixing frame, and a telescopic end of the first hydraulic telescopic rod is fixedly connected to the top of the sealing cover.

[0010] Preferably, the drying unit includes a breathable cover arranged in the sealing cover, and the breathable cover is a cavity structure with an opening at the top, the breathable cover is provided with a plurality of breathable holes, the sealing cover is installed with a disassembly and assembly part compatible with the breathable cover, the bottom of the breathable cover is fixedly connected to a control box, the control box is rotatably connected to at least two first rotating shafts, the first rotating shaft is fixedly connected to a plurality of second stirring blades, and the second stirring blades are located above the breathable cover, a second support frame is rotatably connected in the control box, the external fixed sleeve of the second support frame is provided with a second gear ring, the bottom end of the first rotating shaft is fixedly connected to a second gear meshing with the second gear ring, the bottom end of the second support frame is fixedly connected to a first damping disk located below the control box, the top of the air collecting box is fixedly connected to a support column, the top of the support column is provided with a slide groove, a first prism is provided in the slide groove, the bottom end of the first prism and the bottom inner wall of the slide groove are connected by a compression spring, and the top of the first prism is fixedly connected to a second damping disk in contact with the bottom of the first damping disk.

[0011] Preferably, the disassembly and assembly parts include two piston plates fixedly installed in the breathable cover, the top end of the piston plate passes through the sealing cover, and a plug plate located above the sealing cover passes through the piston plate, support plates are respectively provided at both ends of the plug 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 plug plate, the first stop plate is fixedly connected to the sealing cover, and the second stop plate is fixedly connected to the fixing frame via a connecting frame.

[0012] Preferably, the flipping mechanism includes support boxes respectively arranged on both sides of the drying box, the support box and the base are fixedly connected, a second rotating shaft is rotatably connected to the support box, and the second rotating shaft and the drying box are fixedly connected, 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 gear plate located in the support box, and a third gear located in the support box is fixedly installed on the second rotating shaft, and the third gear and the gear plate are meshed.

[0013] Preferably, a guide groove is provided at the bottom of the tooth plate, 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.

[0014] The present invention also provides a drying method for producing biomass particles, using the drying device for producing biomass particles as described above, comprising the following steps: Step 1: The air outlet pipe and the second air inlet pipe are respectively connected to the input end and the output end of the external gas heating device through a hose, and the external gas heating device inputs the heated air into the air collecting box through the second air inlet pipe and the first air inlet pipe; Step 2: The heated gas is introduced into the drying box through the gas outlet stirring structure, and the gas outlet stirring structure stirs the biomass particles in the drying box, and the hot air with moisture passes through the drying unit on the drying box for drying; Step 3: The dried hot air flows back to the external gas heating device through the outlet pipe and the hose. The external gas heating device heats the gas to a preset temperature. The heated air enters the second air inlet pipe through the hose again. Step 4: When the biomass particles are dried, the sealing cover is driven upward by the lifting member, and then the drying box is driven to flip through the flip mechanism to dump the biomass particles in the drying box, and the unloading is completed.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The heated gas is introduced into the drying box through the air outlet stirring structure, and the air outlet stirring structure stirs the biomass particles in the drying box. The hot air with moisture is dried through the drying unit on the drying box, and the dried hot air flows back to the external gas heating equipment through the air outlet pipe and the hose. The external gas heating equipment heats the gas to a preset temperature, and the heated air enters the second air inlet pipe through the hose again. During the drying process, the moisture in the humid air can be collected, and there is no need to discharge the moisture directly to the outdoors, which avoids heat loss, improves energy utilization, and is convenient for practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure inside the sealing cover of the present invention; Figure 3 It is a structural schematic diagram of the bottom of the control box of the present invention; Figure 4 It is a schematic diagram of the structure inside the drying box of the present invention; Figure 5 is a schematic structural diagram of the first air intake pipe of the present invention; Figure 6 This is a schematic diagram of the structure of the disassembly and assembly of the first prism and the support column of the present invention; Figure 7 This is a schematic structural diagram of the bottom of the support tube of the present invention; Figure 8 It is a schematic diagram of the structure inside the support box of the present invention; Fig. 9 It is a structural schematic diagram of the bottom of the tooth plate of the present invention.

[0018] In the figure: 1, base; 2, drying box; 3, sealing cover; 4, air outlet pipe; 5, air collecting 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, fixed frame; 22, first hydraulic telescopic rod; 23, breathable cover; 24, first rotating shaft; 25, second Stirring blade; 26, control box; 27, second support frame; 28, second gear; 29, second gear ring; 30, first damping disk; 31, support column; 32, second damping disk; 33, first prism; 34, slide groove; 35, compression spring; 36, piston plate; 37, support plate; 38, plug plate; 39, first stop plate; 40, second stop plate; 41, connecting frame; 42, second rotating shaft; 43, support box; 44, third gear; 45, second hydraulic telescopic rod; 46, gear plate; 47, second prism; 48, guide groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Embodiment 1, by Figure 1 , Figure 4 and Figure 5The present invention includes a base 1, a drying box 2 is provided above the base 1, a turning mechanism for driving the drying box 2 to turn over is installed on the base 1, a sealing cover 3 is provided on the top of the drying box 2, an air outlet pipe 4 is provided on the sealing cover 3, a lifting member for driving the sealing cover 3 to rise and fall is installed on the base 1, a drying unit is installed on the sealing cover 3, an air collecting box 5 is provided in the drying box 2, a support ring 6 is rotatably connected to the top of the air collecting box 5, and the support ring 6 is fixedly connected to the drying box 2, a first air inlet pipe 7 is fixedly connected to the bottom of the air collecting box 5, the bottom end of the first air inlet pipe 7 is rotatably connected to the bottom inner wall of the drying box 2, a second air inlet pipe 8 matched with the first air inlet pipe 7 is fixedly connected to the bottom of the drying box 2, and a bottom inner wall of the drying box 2 is provided with The air collecting box 5 is equipped with an air outlet stirring structure, and the air inlet hole 9 is matched with the second air inlet pipe 8. The heated gas is introduced into the drying box 2 through the air outlet stirring structure, and the biomass particles in the drying box 2 are stirred by the air outlet stirring structure. The hot air with moisture is dried by the drying unit on the drying box 2, and the dried hot air flows back to the external gas heating equipment through the air outlet pipe 4 and the hose. The external gas heating equipment heats the gas to a preset temperature, and the heated air enters the second air inlet pipe 8 through the hose again. During the drying process, the moisture in the wet air can be collected, and there is no need to discharge the moisture directly to the outdoors, which avoids heat loss, improves energy utilization, and is convenient for practical use.

[0021] Embodiment 2, based on embodiment 1, Figure 4 , Figure 5 and Figure 7 It is given that the air outlet stirring structure includes at least two support tubes 10 rotatably mounted on the top of the air collecting box 5, and the bottom end of the support tube 10 is located in the air collecting box 5, the support tube 10 is fixedly mounted with a plurality of exhaust plates 11 located above the support ring 6, the exhaust plates 11 are provided with cavities adapted to the support tube 10, a plurality of exhaust ports are provided on the inner wall of the cavity of the exhaust plates 11, a filter screen 12 is fixedly connected to the exhaust port, the support tube 10 is fixedly mounted with a plurality of first stirring blades 20 located above the support ring 6, the drying box 2 is provided with a driving member adapted to the first air inlet pipe 7, the drying box 2 is provided with a transmission unit adapted to the support tube 10, and the driving member 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 box 2, an output end of the servo motor 14 is fixedly connected to a second sprocket 15 located in the drying box 2, the second sprocket 15 and the first sprocket 13 are connected by a chain 16, a transmission unit comprises a first support frame 18 fixedly mounted on the inner wall of the bottom of the drying box 2, and the first air inlet pipe 7 is sleeved on the outside of the first support frame 18, a first gear ring 19 located in the air collecting box 5 is fixedly sleeved on the outside of the first support frame 18, a first gear 17 located in the air collecting box 5 is fixedly sleeved on the bottom end of the support pipe 10, and the first gear 17 is meshed with the first gear ring 19; The external gas heating device inputs the heated air into the air collecting box 5 through the second air inlet pipe 8 and the first air inlet pipe 7, and the hot air enters the exhaust plate 11 through the support pipe 10, and the hot air is discharged into the drying box 2 through the exhaust port on the exhaust plate 11. The design of the filter 12 prevents the biomass particles from entering the exhaust plate 11 through the exhaust port. The second sprocket 15 is driven to rotate by the servo motor 14, and 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 air collecting box 5 to rotate relative to the support ring 6 and the drying box 2, and changes the position of the support pipe 10 in the drying box 2. The air collecting 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 air collecting box 5, and drives the exhaust plate 11 and the first stirring blade 20 to rotate through the support pipe 10, so as to stir the biomass particles in the drying box 2, and at the same time, changes the position of the exhaust port on the exhaust plate 11, so that the hot air dries the biomass particles at different positions in the drying box 2.

[0022] Embodiment 3, based on embodiment 1, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6The lifting member includes a fixed frame 21 fixedly mounted on the top of the base 1, and a first hydraulic telescopic rod 22 is fixedly mounted 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 breathable cover 23 arranged in the sealing cover 3, and the breathable cover 23 is a cavity structure with an opening at the top. The breathable cover 23 is provided with a plurality of breathable holes. The sealing cover 3 is provided with a disassembly and assembly part adapted to the breathable cover 23. The bottom of the breathable cover 23 is fixedly connected to a control box 26, and at least two first rotating shafts 24 are rotatably connected to the control box 26. A plurality of second stirring blades 25 are fixedly connected to the first rotating shaft 24, and the second stirring blades 25 are located above the breathable cover 23. A second supporting frame 27 is rotatably connected in the control box 26, and an external fixed sleeve of the second supporting frame 27 is provided with a second gear ring 29. The bottom end of the first rotating shaft 24 is fixedly connected to a second gear 28 meshing with the second gear ring 29. The bottom end of the second supporting frame 27 A first damping disc 30 located below the control box 26 is fixedly connected, a support column 31 is fixedly connected to the top of the air collecting box 5, a slide groove 34 is opened on the top of the support column 31, a first prism 33 is arranged 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, the top end of the first prism 33 is fixedly connected to the second damping disc 32 in contact with the bottom of the first damping disc 30, the disassembly and assembly parts include two piston plates 36 fixedly installed in the air permeable cover 23, the top end of the piston plate 36 passes through the sealing cover 3, the piston plate 36 is penetrated by a plug plate 38 located above the sealing cover 3, the two ends of the plug plate 38 are respectively sleeved with support plates 37, and the bottom of the support plate 37 is fixedly connected to the top of the sealing cover 3, the two ends of the plug plate 38 are respectively provided with a first stop plate 39 and a second stop plate 40, the first stop plate 39 is fixedly connected to the sealing cover 3, and the second stop plate 40 is fixedly connected to the fixing frame 21 through the connecting frame 41; A desiccant is placed in the air permeable cover 23, and moisture enters the air permeable cover 23 through the air holes on the air permeable cover 23. The moisture in the moisture is absorbed by the desiccant, and the compression spring 35 is in a compressed state. The compression spring 35 applies pressure to the first prism 33 and the second damping disk 32 to make the second damping disk 32 and the first damping disk 30 fit tightly. While the air collecting box 5 rotates, the air collecting box 5 drives the second damping disk 32 to rotate through the support column 31 and the first prism 33. The second damping disk 32 drives the first damping disk 30 and the second support frame 27 to rotate synchronously through friction. The second support frame 27 drives the second gear 28 to rotate through the second gear ring 29. The second gear 28 drives the second stirring blade 25 to rotate through the first rotating shaft 24. The second stirring blade 25 stirs the desiccant in the air permeable cover 23 to change the position of the desiccant so that the moisture of the desiccant at different positions in the air permeable cover 23 is evenly absorbed. When the desiccant needs to be replaced , the sealing cover 3 is driven to move up 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, and the sealing cover 3 drives the plug plate 38, the piston plate 36 and the breathable cover 23 to move up synchronously through the support plate 37, and the position of the plug plate 38 is limited by the first stop plate 39 and the second stop plate 40 to prevent the plug plate 38 from separating from the support plate 37 and the piston plate 36. When the sealing cover 3 moves up to a preset height, the second stop plate 40 no longer blocks the horizontal movement of the plug plate 38, and the staff drives the plug plate 38 to move in a direction away from the first stop plate 39 to separate the plug plate 38 from the support plate 37 and the piston plate 36, thereby releasing the limitation on the position of the piston plate 36 and the breathable cover 23, and the staff drives the piston plate 36 to move downward to make the breathable cover 23 slide out of the sealing cover 3, and finally the piston plate 36 separates from the sealing cover 3, completing the removal of the breathable cover 23, and the staff can replace the desiccant in the breathable cover 23.

[0023] Embodiment 4, based on embodiment 1, Figure 1 , Figure 8 and Fig. 9 It is given that the flip mechanism includes support boxes 43 respectively arranged on both sides of the drying box 2, the support box 43 is fixedly connected to the base 1, 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, and the telescopic end of the second hydraulic telescopic rod 45 is fixedly connected to a toothed plate 46 located in the support box 43, and the second rotating shaft 42 is fixedly installed with a third gear 44 located in the support box 43, and the third gear 44 and the toothed plate 46 are meshed, and a guide groove 48 is opened at the bottom of the toothed plate 46, 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; The second rotating shaft 42 and the supporting box 43 are designed so that the drying box 2 can be rotatably connected relative to the base 1. The second hydraulic telescopic rod 45 drives the tooth plate 46 to move, and the tooth plate 46 can drive the third gear 44 and the second rotating shaft 42 to rotate. The second rotating shaft 42 can drive the drying box 2 to flip. When the tooth plate 46 moves in the vertical direction, the tooth 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 can reduce the possibility of tilting and shaking of the tooth plate 46.

[0024] A drying method for producing biomass pellets in this embodiment uses the drying device for producing biomass pellets as described above, and includes the following steps: Step 1: The air outlet pipe 4 and the second air inlet pipe 8 are respectively connected to the input end and the output end of the external gas heating device through a hose, and the external gas heating device inputs the heated air into the air collecting box 5 through the second air inlet pipe 8 and the first air inlet pipe 7; Step 2: The heated gas is introduced into the drying box 2 through the gas outlet stirring structure, and the gas outlet stirring structure stirs the biomass particles in the drying box 2, and the hot air with moisture is dried through the drying unit on the drying box 2; Step 3: The dried hot air flows back to the external gas heating device through the gas outlet pipe 4 and the hose. The external gas heating device heats the gas to a preset temperature. The heated air enters the second gas inlet pipe 8 through the hose again. Step 4: After the biomass particles are dried, the sealing cover 3 is driven upward by the lifting member, and then the drying box 2 is driven to flip through the flip mechanism to dump the biomass particles in the drying box 2, thereby completing the unloading.

[0025] Working principle: during operation, the air outlet pipe 4 and the second air inlet pipe 8 are respectively connected to the input end and the output end of the external gas heating device through a hose, and the external gas heating device inputs the heated air into the air collecting box 5 through the second air inlet pipe 8 and the first air inlet pipe 7, and the heated gas is passed into the drying box 2 through the air outlet stirring structure, and the air outlet stirring structure stirs the biomass particles in the drying box 2, and the hot air with moisture is dried through the drying unit on the drying box 2, and the dried hot air flows back to the external gas heating device through the air outlet pipe 4 and the hose again, and the external gas heating device heats the gas to a preset temperature, and the heated air enters the second air inlet pipe 8 through the hose again, when the drying of the biomass particles is completed, the sealing cover 3 is driven to move up by the lifting member, and then the drying box 2 is driven to flip by the flip mechanism, and the biomass particles in the drying box 2 are dumped out, and the unloading is completed. In the drying process, the moisture in the moisture can be collected, and there is no need to discharge the moisture directly to the outdoors, thereby avoiding heat loss, improving energy utilization, and facilitating practical use; The external gas heating device inputs the heated air into the air collecting box 5 through the second air inlet pipe 8 and the first air inlet pipe 7, and the hot air enters the exhaust plate 11 through the support pipe 10, and the hot air is discharged into the drying box 2 through the exhaust port on the exhaust plate 11. The design of the filter screen 12 prevents the biomass particles from entering the exhaust plate 11 through the exhaust port, and the second sprocket 15 is driven to rotate by the servo motor 14, and the second sprocket 15 drives the first sprocket 13 and the first air inlet pipe 7 to rotate through the chain 16, and the first air inlet pipe 7 drives the air collecting box 5 to rotate relative to the support ring 6 and the drying box 2, and changes the position of the support pipe 10 in the drying box 2, and the air collecting 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 air collecting box 5, and drives the exhaust plate 11 and the first stirring blade 20 to rotate through the support pipe 10, so as to stir the biomass particles in the drying box 2, and at the same time, changes the position of the exhaust port on the exhaust plate 11, so that the hot air dries the biomass particles at different positions in the drying box 2; A desiccant is placed in the air permeable cover 23, and moisture enters the air permeable cover 23 through the air holes on the air permeable cover 23. The moisture in the moisture is absorbed by the desiccant, and the compression spring 35 is in a compressed state. The compression spring 35 applies pressure to the first prism 33 and the second damping disk 32 to make the second damping disk 32 and the first damping disk 30 fit tightly. While the air collecting box 5 rotates, the air collecting box 5 drives the second damping disk 32 to rotate through the support column 31 and the first prism 33. The second damping disk 32 drives the first damping disk 30 and the second support frame 27 to rotate synchronously through friction. The second support frame 27 drives the second gear 28 to rotate through the second gear ring 29. The second gear 28 drives the second stirring blade 25 to rotate through the first rotating shaft 24. The second stirring blade 25 stirs the desiccant in the air permeable cover 23 to change the position of the desiccant so that the moisture of the desiccant at different positions in the air permeable cover 23 is evenly absorbed. 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, and the sealing cover 3 drives the plug plate 38, the piston plate 36 and the breathable cover 23 to move upward synchronously through the support plate 37, and the position of the plug plate 38 is limited by the first stop plate 39 and the second stop plate 40 to prevent the plug plate 38 from separating from the support plate 37 and the piston plate 36. When the sealing cover 3 moves up to a preset height, the second stop plate 40 no longer blocks the horizontal movement of the plug plate 38, and the staff drives the plug plate 38 to move in a direction away from the first stop plate 39 to separate the plug plate 38 from the support plate 37 and the piston plate 36, thereby releasing the limitation on the position of the piston plate 36 and the breathable cover 23, and the staff drives the piston plate 36 to move downward to make the breathable cover 23 slide out of the sealing cover 3, and finally the piston plate 36 separates from the sealing cover 3, completing the removal of the breathable cover 23, and the staff can replace the desiccant in the breathable cover 23; The second rotating shaft 42 and the supporting box 43 are designed so that the drying box 2 can be rotatably connected relative to the base 1. The second hydraulic telescopic rod 45 drives the tooth plate 46 to move, and the tooth plate 46 can drive the third gear 44 and the second rotating shaft 42 to rotate. The second rotating shaft 42 can drive the drying box 2 to flip. When the tooth plate 46 moves in the vertical direction, the tooth 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 can reduce the possibility of tilting and shaking of the tooth plate 46.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drying device for producing biomass pellets, comprising a base (1), characterized in that: A drying box (2) is provided above the base (1), and a turning mechanism for driving the drying box (2) to turn is installed on the base (1). A sealing cover (3) is provided at the top of the drying box (2), and an air outlet pipe (4) is provided on the sealing cover (3). A lifting member for driving the sealing cover (3) to rise and fall is installed on the base (1), and a drying unit is installed on the sealing cover (3). An air collecting box (5) is provided in the drying box (2), and a support ring (6) is rotatably connected to the top of the air collecting box (5), and the support ring (6) and the drying box (2) are fixedly connected. A first air inlet pipe (7) is fixedly connected to the bottom of the air collecting box (5), and the bottom end of the first air inlet pipe (7) is rotatably connected to the bottom inner wall of the drying box (2). A second air inlet pipe (8) matched with the first air inlet pipe (7) is fixedly connected to the bottom of the drying box (2), and an air inlet hole (9) matched with the second air inlet pipe (8) is opened on the bottom inner wall of the drying box (2). The air collecting box (5) is equipped with an air outlet stirring structure.

2. A drying device for producing biomass particles according to claim 1, characterized in that: The air outlet stirring structure comprises at least two support tubes (10) rotatably mounted on the top of the air collecting box (5), and the bottom end of the support tube (10) is located in the air collecting box (5); the support tube (10) is fixedly mounted with a plurality of exhaust plates (11) located above the support ring (6); a cavity matching the support tube (10) is provided in the exhaust plate (11); a plurality of exhaust ports are provided on the inner wall of the cavity of the exhaust plate (11); a filter screen (12) is fixedly connected in the exhaust port; a plurality of first stirring blades (20) located above the support ring (6) are fixedly mounted on the support tube (10); a driving member matching the first air inlet pipe (7) is installed in the drying box (2); and a transmission unit matching the support tube (10) is installed in the drying box (2).

3. A drying device for producing biomass particles according to claim 2, characterized in that: The driving member comprises a first sprocket (13) fixedly sleeved on the outside of the first air inlet pipe (7); a servo motor (14) is fixedly connected to the bottom of the drying box (2); an output end of the servo motor (14) is fixedly connected to a second sprocket (15) located in the drying box (2); and the second sprocket (15) and the first sprocket (13) are connected via a chain (16).

4. A drying device for producing biomass particles according to claim 2, characterized in that: The transmission unit comprises a first support frame (18) fixedly mounted on the inner wall of the bottom of the drying box (2), and the first air inlet pipe (7) is sleeved on the outside of the first support frame (18), the outside of the first support frame (18) is fixedly sleeved with a first gear ring (19) located in the air collecting box (5), the bottom end of the support pipe (10) is fixedly sleeved with a first gear (17) located in the air collecting box (5), and the first gear (17) and the first gear ring (19) are meshed.

5. A drying device for producing biomass particles according to claim 1, characterized in that: The lifting member comprises a fixing frame (21) fixedly mounted on the top of the base (1); a first hydraulic telescopic rod (22) is fixedly mounted on the fixing frame (21); and a telescopic end of the first hydraulic telescopic rod (22) is fixedly connected to the top of the sealing cover (3).

6. A drying device for producing biomass particles according to claim 5, characterized in that: The drying unit comprises a breathable cover (23) arranged in the sealing cover (3), and the breathable cover (23) is a cavity structure with an opening at the top, and a plurality of breathable holes are formed on the breathable cover (23). The sealing cover (3) is provided with a disassembly component adapted to the breathable cover (23). A control box (26) is fixedly connected to the bottom of the breathable cover (23), and at least two first rotating shafts (24) are rotatably connected to the control box (26). A plurality of second stirring blades (25) are fixedly connected to the first rotating shafts (24), and the second stirring blades (25) are located above the breathable cover (23). A second support frame (27) is rotatably connected to the control box (26), and an external fixed sleeve of the second support frame (27) is provided. A second gear ring (29) is provided, the bottom end of the first rotating shaft (24) is fixedly connected to a second gear (28) meshing with the second gear ring (29), the bottom end of the second support frame (27) is fixedly connected to a first damping plate (30) located below the control box (26), the top of the air collecting box (5) is fixedly connected to a support column (31), a slide groove (34) is provided at 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), and the top end of the first prism (33) is fixedly connected to a second damping plate (32) in contact with the bottom of the first damping plate (30).

7. A drying device for producing biomass particles according to claim 6, characterized in that: The disassembly and assembly parts include two piston plates (36) fixedly installed in the breathable cover (23), the top end of the piston plate (36) passes through the sealing cover (3), and a plug plate (38) located above the sealing cover (3) passes through the piston plate (36), and support plates (37) are respectively sleeved on both ends of the plug plate (38), and the bottom of the support plate (37) and the top of the sealing cover (3) are fixedly connected, and a first stop plate (39) and a second stop plate (40) are respectively provided on both ends of the plug plate (38), the first stop plate (39) and the sealing cover (3) are fixedly connected, and the second stop plate (40) and the fixing frame (21) are fixedly connected via a connecting frame (41).

8. A drying device for producing biomass particles according to claim 1, characterized in that: The turning mechanism comprises support boxes (43) respectively arranged on both sides of the drying box (2); the support box (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) and the drying box (2) are fixedly connected; a second hydraulic telescopic rod (45) is fixedly installed on the support box (43); a telescopic end of the second hydraulic telescopic rod (45) is fixedly connected to a toothed plate (46) located in the support box (43); a third gear (44) located in the support box (43) is fixedly installed on the second rotating shaft (42); and the third gear (44) and the toothed plate (46) are meshed.

9. A drying device for producing biomass particles according to claim 8, characterized in that: A guide groove (48) is provided at the bottom of the tooth plate (46), a second prism (47) is slidably arranged 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).

10. A drying method for producing biomass pellets, using the drying device for producing biomass pellets as claimed in claim 1, characterized in that: The following steps are involved: Step 1: The air outlet pipe (4) and the second air inlet pipe (8) are respectively connected to the input end and the output end of the external gas heating device through a hose, and the external gas heating device inputs the heated air into the air collecting box (5) through the second air inlet pipe (8) and the first air inlet pipe (7); Step 2: The heated gas is introduced into the drying box (2) through the gas outlet stirring structure, and the gas outlet stirring structure stirs the biomass particles in the drying box (2), and the hot air with moisture is dried through the drying unit on the drying box (2); Step 3: The dried hot air flows back to the external gas heating device through the gas outlet pipe (4) and the hose. The external gas heating device heats the gas to a preset temperature. The heated air flows into the second gas inlet pipe (8) through the hose again. Step 4: When the biomass particles are dried, the sealing cover (3) is driven upward by the lifting member, and then the drying box (2) is driven to flip through the flip mechanism to pour out the biomass particles in the drying box (2), thereby completing the unloading.

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