Multi-channel airflow classification drying device for biomass fuel raw materials

Abstract

The invention discloses a multi-channel airflow classification drying device for biomass fuel raw materials, and relates to the technical field of drying devices. A multi-channel airflow grading drying device for biomass fuel raw materials comprises a drying tower body, supporting legs are annularly distributed and installed on the outer wall of the bottom of the drying tower body, a feeding pipe is installed on the outer wall of one side of the drying tower body, and a coarse discharging opening is formed in the bottom of the drying tower body; the thin discharging pipe and the middle discharging pipe are mounted on the outer wall of the other side of the drying tower body; an air blowing assembly; the drying tower body is provided with the thick discharging port, the thin discharging pipe and the middle discharging pipe, to-be-dried material fuel can be automatically conveyed in a graded mode, the situation that drying is not thorough during drying due to the fact that the granularity of materials is different is avoided, and therefore the drying efficiency of the materials is improved; and the subsequent step of classifying and screening the materials can be omitted, the overall processing efficiency of the materials is improved, and the production cost is saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of drying devices, and in particular relates to a multi-channel airflow classification drying device for biomass fuel raw materials. Background Art

[0002] As an important renewable energy source, biomass fuels (such as wood chips, straw, rice husks, and fruit shells) rely on raw material pretreatment for efficient utilization, with drying being a key step. Biomass raw materials typically have high initial moisture content (often reaching 40%-60% or even higher), wide variations in physical form (size and density), thermal sensitivity (prone to charring or decomposition at high temperatures, resulting in calorific value loss), and stickiness (wet materials tend to agglomerate).

[0003] Existing processes typically employ a mechanical screening and grading process followed by separate drying. This not only increases equipment investment and floor space, but also creates dust and mechanical damage during grading and transport. Furthermore, the graded materials still require their own independent drying systems, resulting in a complex overall process and significant energy consumption. Furthermore, during operation, some single-channel biomass fuel drying equipment suffers from varying particle sizes. Small particles and light materials are easily blown away or over-dried (even charred), while large particles and heavy materials are under-dried. This results in uneven moisture content in the final product, impacting combustion efficiency and storage stability. To address these issues, we propose a multi-channel airflow grading drying device for biomass fuel raw materials to address these issues. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a multi-channel airflow classification drying device for biomass fuel raw materials that can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a multi-channel airflow classification drying device for biomass fuel raw materials, including a drying tower body, the bottom outer wall of the drying tower body is annularly installed with support legs, and also includes: a feed pipe is installed on the outer wall of one side of the drying tower body, and a coarse discharge port is provided at the bottom of the drying tower body; a fine discharge pipe and a medium discharge pipe are installed on the outer wall of the other side of the drying tower body; an air blowing assembly is arranged in the bottom of the drying tower body, and is used to blow and dry the material falling in the drying tower body; a liftable semicircular part is slidably connected to the inner wall of the drying tower body, and a driving part is connected and installed on the top of the semicircular part; a rotating assembly is installed in the drying tower body, and when the rotating assembly rotates, foreign matter stuck on the surface of the semicircular part is cleaned, and at the same time, the material in a rising state by air blowing can be broken up.

[0006] Preferably, the blowing assembly includes a support plate fixed on the inner wall of the drying tower body, a hot air pipe is installed on the support plate, an axial nozzle is fixed at one end of the hot air pipe, a first diversion pipe is installed in an annular distribution on the outer wall of the axial nozzle, and a second diversion pipe is also installed in an annular distribution on the outer wall of the axial nozzle on one side of the first diversion pipe.

[0007] Preferably, the semicircular member includes a semicircular cover arranged in the drying tower body, the right surface of the semicircular cover is provided with a first through hole, the top surface of the semicircular cover is provided with a second through hole, and the left surface of the semicircular cover is provided with an air jet.

[0008] Preferably, the driving member includes a sliding rod fixed on the top of the semicircular cover, one end of the sliding rod passes through the drying tower body and extends to the outside where a connecting plate is fixed, a return spring is sleeved on the surface of the sliding rod, and the two ends of the return spring are respectively fixedly connected to the connecting plate and the outer wall of the drying tower body, an eccentric wheel is attached to the surface of the connecting plate, and one side of the eccentric wheel is fixedly connected to the output end of the first driving part, the first driving part is mounted on a mounting seat, and the mounting seat is fixedly mounted on the outer wall of the drying tower body.

[0009] Preferably, a lifting rod is fixedly connected to the surface of the connecting plate, a piston is fixed to one end of the lifting rod, the piston is slidably connected in the connecting cylinder, the connecting cylinder is embedded in the drying tower body, a sealing sleeve is fixed between the piston and the inner wall of the connecting cylinder, and the sealing sleeve is arranged on the surface of the lifting rod.

[0010] Preferably, a guide plate is fixed to the inner wall of the drying tower body, an exhaust pipe a is fixed to one end of the connecting tube, one end of the exhaust pipe a passes through the guide plate and extends to the interior of the drying tower body, an exhaust pipe b is fixed to the other end of the connecting tube, the end of the exhaust pipe b passes through the guide plate and extends to the interior of the drying tower body, one end of the connecting tube is located on one side of the exhaust pipe a and is fixed with an exhaust pipe a, and the other end of the connecting tube is located on one side of the exhaust pipe b and is fixed with an exhaust pipe b.

[0011] Preferably, one end of the outlet pipe b is connected to the outlet pipe a, and a one-way valve is provided at the connection between the outlet pipe b, the outlet pipe a, the exhaust pipe a and the exhaust pipe b and the connecting tube, and a dustproof net is provided at the air inlet end of the exhaust pipe b and the exhaust pipe a.

[0012] Preferably, one end of the air outlet pipe a passes through the inner wall of the drying tower body and is fixed with a hose, one end of the hose is fixed with a jet disk, the jet disk is embedded and installed on one side outer wall of the semicircular cover, and the jet disk is connected to the jet port.

[0013] Preferably, the rotating assembly includes a rotating shaft rotatably connected to the inner wall of the drying tower body through a bearing, a second driving part is fixed to one end of the rotating shaft, the second driving part is installed on the outer wall of the drying tower body, and a semicircular plate is fixed to the surface of the rotating shaft.

[0014] Preferably, a groove is provided on the surface of the semicircular plate, a protruding block is slidably connected inside the groove, an extrusion spring is fixed to one end of the protruding block, one end of the extrusion spring is fixed in the groove, and one end of the protruding block is rounded.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention provides a coarse discharge port, a fine discharge pipe and a medium discharge pipe on the drying tower body, so that the material fuel to be dried can be automatically graded and transported, avoiding the occurrence of incomplete drying caused by different particle sizes in the material during drying, thereby improving the drying efficiency of the material, and eliminating the subsequent material classification and screening steps, thereby improving the overall processing efficiency of the material and saving production costs.

[0016] The present invention provides an air blowing component in the drying tower body, and the output air flow inside the drying tower body is transported in a state of gradually weakening from the axis to the outside. At the same time, in conjunction with the semicircular part, the air flow can be used to blow up the material in the drying tower body, and the material with heavier weight falls near the periphery of the air flow conveying channel and falls and is separated from the coarse discharge port. On the other hand, the movable semicircular part is driven by the driving part to reciprocate up and down in the drying tower body, thereby changing the air flow intensity passing through the semicircular part, thereby improving the mixing effect of the material and the pass rate of the fine material. At the same time, part of the collected air flow is used to blow directly from the left side of the semicircular part to transport the medium material to the fine discharge pipe, thereby realizing the re-classification of the material.

[0017] The present invention can utilize the rotating component provided to rotate in the drying tower body by using the semicircular plate, scrape and clean the inner wall of the semicircular part, dredge the material stuck on the semicircular part, improve the classification effect of fine material, and avoid blockage. At the same time, as the semicircular plate continues to rotate, the material rising with the air flow can be broken up, avoiding the concentrated accumulation of material in the semicircular part, and also assisting the conveying and classification effect of medium material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached figure: Figure 1 This is a schematic diagram of the overall structure of a multi-channel airflow classification drying device for biomass fuel raw materials proposed by the present invention; Figure 2 This is a schematic diagram of the top view of a multi-channel airflow classification drying device for biomass fuel raw materials proposed by the present invention; Figure 3This is a schematic side cross-sectional structural diagram of a multi-channel airflow classification drying device for biomass fuel raw materials proposed by the present invention; Figure 4 The present invention proposes Figure 3 Schematic diagram of the enlarged structure of area A in the middle; Figure 5 The present invention proposes Figure 3 Schematic diagram of the enlarged structure of the middle B area; Figure 6 This is a schematic diagram of the partial three-dimensional structure of a semicircular component in a multi-channel airflow classification drying device for biomass fuel raw materials proposed by the present invention; Figure 7 This is a schematic diagram of a partial cross-sectional structure of a drying tower in a multi-channel airflow classification drying device for biomass fuel raw materials proposed by the present invention; Figure 8 This is a schematic diagram of the partial cross-sectional structure of the rotating component in a multi-channel airflow classification drying device for biomass fuel raw materials proposed by the present invention.

[0019] In the figure: 1. Drying tower body; 11. Feed pipe; 12. Support leg; 13. Coarse discharge port; 14. Fine discharge pipe; 15. Medium discharge pipe; 21. Support plate; 22. Hot air pipe; 23. Axial nozzle; 24. First diverter pipe; 25. Second diverter pipe; 3. Semicircular cover; 31. First through hole; 32. Second through hole; 33. Air jet; 41. Mounting seat; 42. First drive unit; 43. Eccentric wheel; 44. Connecting plate; 45. Sliding rod; 46. Return spring; 51. Lifting rod; 52. Piston; 53. Connecting tube; 54. Sealing sleeve; 55. Guide plate; 56. Exhaust pipe a; 57. Exhaust pipe b; 58. Exhaust pipe a; 581. Hose; 59. Exhaust pipe b; 591. Jet disc; 61. Rotating shaft; 62. Second driving part; 63. Semicircular plate; 64. Raised block; 65. Groove; 66. Extrusion spring. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0021] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0022] In the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] Example 1: Reference Figures 1-8 A multi-channel airflow classification drying device for biomass fuel raw materials includes a drying tower body 1, and the bottom outer wall of the drying tower body 1 is annularly installed with supporting legs 12. It also includes: a feed pipe 11 is installed on the outer wall of one side of the drying tower body 1, and a coarse discharge port 13 is provided at the bottom of the drying tower body 1; a fine discharge pipe 14 and a medium discharge pipe 15 are installed on the outer wall of the other side of the drying tower body 1; a blowing assembly is arranged in the bottom of the drying tower body 1, for blowing and drying the material falling in the drying tower body 1; a liftable semicircular part is slidably connected to the inner wall of the drying tower body 1, and a driving part is connected and installed on the top of the semicircular part; a rotating assembly is installed in the drying tower body 1, and when the rotating assembly rotates, it cleans foreign matter stuck on the surface of the semicircular part, and at the same time, it can break up the material that is in a rising state by blowing air.

[0024] In the present invention, when in use, one end of the feed pipe 11 is connected to the screw conveying device, and the screw is used to slowly convey the material to the inside of the drying tower body 1. Before conveying the material, one end of the blowing component is connected to the hot blast furnace system. The hot blast furnace system includes a high-pressure blower device and a combustion chamber. The combustion chamber heats the air, and then the hot air is conveyed to the blowing component, and the hot air is conveyed to the inside of the drying tower body 1, and blown upward from the bottom of the drying tower body 1, thereby blowing the material falling from the feed pipe 11 up inside the drying tower body 1. Due to the setting of the blowing component, the airflow blowing state gradually weakens from the axis to the outside. Therefore, the material with a larger dead weight is blown to the semicircular part, blocked, and then dispersed in the drying tower body 1, falling along the inner walls around it, to achieve coarse screening of the material. During the operation, the semicircular part is driven by the driving part to reciprocate up and down, thereby changing the airflow intensity passing through the semicircular part, improving The smoothness of material passing through is high. On the other hand, when the semicircular part reciprocates up and down, the airflow after passing through the semicircular part can be collected and then transported to the left side of the semicircular part for blowing out. In this way, as the airflow changes conveniently in the semicircular part, the medium material in the material is screened out along the right side of the semicircular part and transported out through the medium discharge pipe 15, and the fine material is guided after passing through the semicircular part and then transported out through the fine discharge pipe 14. In this way, the coarse, medium and fine grading, screening and drying operations of the material are realized. During the material drying operation, the rotating component is operated and rotated around the axis of the semicircular part. On the one hand, the material stuck in the semicircular part can be dredged and cleaned to avoid the situation where the airflow becomes smaller. On the other hand, as the semicircular plate 63 continues to rotate, the material rising with the airflow can be broken up to avoid the concentrated accumulation of material in the semicircular part, which can also assist in the conveying and grading effect of the medium material.

[0025] Example 2: Reference Figure 3 , which is basically the same as Example 1, and further: the blowing component includes a support plate 21 fixed to the inner wall of the drying tower body 1, a hot air pipe 22 is installed on the support plate 21, an axial nozzle 23 is fixed to one end of the hot air pipe 22, and a first diversion pipe 24 is installed in an annular distribution on the outer wall of the axial nozzle 23, and a second diversion pipe 25 is also installed in an annular distribution on the outer wall of the axial nozzle 23 on one side of the first diversion pipe 24.

[0026] One end of the hot air pipe 22 of the blowing component is connected to the hot air furnace system to transport the hot air flow to the interior of the drying tower body 1. The hot air furnace system is not shown in the figure and is a prior art and will not be described here. After the hot air is transported into the hot air pipe 22, an axial nozzle 23 is provided at the air outlet at one end of the hot air pipe 22, and a first diversion pipe 24 distributed in an annular manner is provided around the outside of the axial nozzle 23. A second diversion pipe 25 is also distributed around the first diversion pipe 24, and the diameter of the second diversion pipe 25 is smaller than the first diversion pipe 24. The diameter of the first diversion pipe 24 is smaller than the axial nozzle 23, so that an air flow conveying mode with high axial air flow intensity and gradually weakening at the periphery is achieved. In this case, when the material falls from the feed pipe 11, the material can be blown up by the blowing conveying of the blowing component, and the hot air can be used to dry the material and at the same time, the material can be coarsely screened. The material with a larger weight falls around the inner wall of the drying tower body 1 when the peripheral air flow intensity is weak, so that the coarse material can be collected separately.

[0027] Example 3: Reference Figure 5 、 Figure 6 and Figure 7 , which is basically the same as Example 2, further: the semicircular member includes a semicircular cover 3 arranged in the drying tower body 1, the right side surface of the semicircular cover 3 is provided with a first through hole 31, the top surface of the semicircular cover 3 is provided with a second through hole 32, and the left surface of the semicircular cover 3 is provided with an air jet port 33, and the driving member includes a sliding rod 45 fixed to the top of the semicircular cover 3, one end of the sliding rod 45 passes through the drying tower body 1 and extends to the outside where a connecting plate 44 is fixed, and a return spring 46 is sleeved on the surface of the sliding rod 45, and the two ends of the return spring 46 are respectively fixedly connected to the connecting plate 44 and the outer wall of the drying tower body 1, and an eccentric wheel 43 is attached to the surface of the connecting plate 44, and one side of the eccentric wheel 43 is fixedly connected to the output end of the first driving part 42, and the first driving part 42 is mounted on the mounting seat 41, and the mounting seat 41 is fixedly mounted on the outer wall of the drying tower body 1.

[0028] The bottom edge of the semicircular cover 3 fits with the inner wall of the drying tower body 1, which can limit the semicircular cover 3 while preventing the material rising by the air from escaping from the connection between the drying tower body 1 and the semicircular cover 3. A second through hole 32 is provided on the top surface of the semicircular cover 3, and a first through hole 31 is provided on the right surface of the semicircular cover 3. The aperture of the first through hole 31 is larger than the aperture of the second through hole 32. Therefore, when the material is blown to the semicircular cover 3 by the air flow, the fine material runs out after passing through the second through hole 32, and then is transported out through the fine discharge pipe 14 through the diversion, thereby realizing the screening of the fine material.

[0029] The first driving part 42 is driven by a reduction motor instead. When in use, the first driving part 42 is started to drive the eccentric wheel 43 to rotate, and the elastic force of the return spring 46 is used to make the slide rod 45 drive the semicircular cover 3 to move back and forth up and down. In this way, the airflow passing through the second through hole 32 generates a certain impact force, which changes the strength of the airflow, improves the smoothness of material transportation, and reduces the occurrence of material jamming.

[0030] The surface of the connecting plate 44 is fixedly connected to a lifting rod 51, one end of the lifting rod 51 is fixed with a piston 52, the piston 52 is slidably connected to the connecting cylinder 53, the connecting cylinder 53 is embedded and installed in the drying tower body 1, a sealing sleeve 54 is fixed between the piston 52 and the inner wall of the connecting cylinder 53, the sealing sleeve 54 is sleeved on the surface of the lifting rod 51, the inner wall of the drying tower body 1 is fixed with a guide plate 55, one end of the connecting cylinder 53 is fixed with an exhaust pipe a56, one end of the exhaust pipe a56 passes through the guide plate 55 and extends to the interior of the drying tower body 1, the other end of the connecting cylinder 53 is fixed with an exhaust pipe b57, the end of the exhaust pipe b57 passes through the guide plate 55 and extends to the interior of the drying tower body 1, the connecting cylinder 53 is fixed with an exhaust pipe b57, the end of the exhaust pipe b57 passes through the guide plate 55 and extends to the interior of the drying tower body 1, One end of the air outlet pipe a58 is fixed to one side of the exhaust pipe a56, and the other end of the connecting tube 53 is fixed to one side of the exhaust pipe b57. One end of the air outlet pipe b59 is connected to the air outlet pipe a58. A one-way valve is provided at the connection between the air outlet pipe b59, the air outlet pipe a58, the exhaust pipe a56 and the exhaust pipe b57 and the connecting tube 53. The air inlet ends of the exhaust pipe b57 and the exhaust pipe a56 are provided with a dustproof net. One end of the air outlet pipe a58 passes through the inner wall of the drying tower body 1 and is fixed with a hose 581. One end of the hose 581 is fixed with a jet disk 591. The jet disk 591 is embedded and installed on the outer wall of one side of the semicircular cover 3, and the jet disk 591 is connected to the jet port 33.

[0031] When the lifting rod 51 is fixedly connected to the connecting plate 44, the lifting rod 51 is driven to run synchronously when the connecting plate 44 reciprocates up and down. With the setting of the gas collecting structure, when the piston 52 moves down, the exhaust pipe a56 extracts the hot air flow from the drying tower body 1. At this time, the air in the rodless cavity in the connecting tube 53 is transported through the outlet pipe b59 to the outlet pipe a58 and finally enters the hose 581 to be diverted and ejected from the jet port 33. When the piston 52 moves up, the rod cavity air in the connecting tube 53 is transported out through the outlet pipe a58. At this time, the exhaust pipe b57 extracts the hot air flow in the drying tower body 1, thereby realizing the sustainable jetting at the jet disk 591. The jet port 33 is continuous and points to the first through hole 31, so that the medium material can be screened from the first through hole 31 and then transported out through the medium discharge pipe 15. The connection between the medium discharge pipe 15, the fine discharge pipe 14 and the drying tower body 1 is trumpet-shaped, which facilitates the transportation of materials and prevents the materials from getting stuck and accumulating. Moreover, with the continuous blowing of the airflow, the materials are prevented from staying. Through the above scheme, not only the coarseness of the materials can be screened, but also the medium materials can be screened, transported and dried separately, eliminating the trouble of subsequent grading. At the same time, better drying measures can be provided while grading materials of different coarsenesses to avoid the occurrence of phenomena such as coking of fine materials.

[0032] Example 4: Reference Figure 4 and Figure 8 , which is basically the same as Example 3, and furthermore, the rotating assembly includes a rotating shaft 61 rotatably connected to the inner wall of the drying tower body 1 through a bearing, and one end of the rotating shaft 61 is fixed with a second driving part 62, and the second driving part 62 is installed on the outer wall of the drying tower body 1, and a semicircular plate 63 is fixed to the surface of the rotating shaft 61, and a groove 65 is provided on the surface of the semicircular plate 63. A protruding block 64 is slidably connected to the inside of the groove 65, and one end of the protruding block 64 is fixed with an extrusion spring 66, and one end of the extrusion spring 66 is fixed in the groove 65, and one end of the protruding block 64 is rounded.

[0033] The second drive unit 62 is replaced by a reduction motor. When the device is started, the second drive unit 62 drives the rotating shaft 61 to rotate counterclockwise, and the rotation of the rotating shaft 61 drives the semicircular plate 63 to rotate. The inner wall of the semicircular plate 63 is provided with a protruding block 64. When the side of the semicircular plate 63 contacts the inner arc surface of the semicircular cover 3 as it rotates, the protruding block 64 is used to contact the second through hole 32 and the inner hole of the first through hole 31 on the semicircular cover 3 to dredge the material stuck in the hole, improve the passing efficiency of the material, and prevent blockage. Since the semicircular cover 3 itself can move back and forth, the protruding block 64 at the semicircular plate 63 is in contact with the inner wall of the semicircular cover 3 for a short time, which effectively reduces friction damage between components and extends the service life of the device. When the semicircular plate 63 is aligned with the axis of the rotating shaft 61 when rotating, the inner arc surface of the semicircular cover 3 is The material in the inner air flow mixture has a partial interception effect, which facilitates the mixing of the air jet at the air jet port 33 and the rising air flow so that the middle material is screened out from the first through hole 31, and at the same time, the material can be mixed and rolled, which has a certain stirring effect and breaks up some knotted materials. When the semicircular plate 63 rotates about 60 degrees, it has a certain shielding effect on the blowing of the air flow at the first through hole 31 on the right side, so that the air flow ejected from the second through hole 32 obtains more strength changes, and the material dispersion effect is good while improving the stability of material classification. As the semicircular plate 63 continues to rotate, the material under the semicircular cover 3 can be lifted up and re-enter the inner arc surface of the semicircular cover 3 for screening and grading. In this state of continuous rotation, the material rising with the air flow can be broken up to avoid the concentrated accumulation of materials in the semicircular member, and it can also assist in the conveying and grading effect of the middle material.

[0034] The above embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patented invention. It should be noted that those skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention. These variations and improvements are equivalent modifications and improvements to the above embodiments based on the essential technology of the present invention and fall within the scope of protection of the present invention.

Claims

1. A multi-channel airflow classification drying device for biomass fuel raw materials, comprising a drying tower body (1), wherein the bottom outer wall of the drying tower body (1) is provided with support legs (12) distributed in an annular manner, characterized in that: Also includes: A feed pipe (11) is installed on one side outer wall of the drying tower body (1), and a coarse material discharge port (13) is provided at the bottom of the drying tower body (1); The thin discharge pipe (14) and the medium discharge pipe (15) are installed on the outer wall of the other side of the drying tower body (1); An air blowing assembly is arranged in the bottom of the drying tower body (1) and is used to blow and dry the material falling in the drying tower body (1); A semicircular member that can be lifted and lowered is slidably connected to the inner wall of the drying tower body (1), and a driving member is connected and installed on the top of the semicircular member; The rotating assembly is installed in the drying tower body (1). When the rotating assembly rotates, foreign matter stuck on the surface of the semicircular part is cleaned, and at the same time, the material in the rising state of the air flow blowing is dispersed.

2. A multi-channel airflow classification drying device for biomass fuel raw materials according to claim 1, characterized in that: The air blowing assembly comprises a support plate (21) fixed to the inner wall of the drying tower body (1), a hot air pipe (22) is installed on the support plate (21), an axial nozzle (23) is fixed to one end of the hot air pipe (22), a first diversion pipe (24) is annularly installed on the outer wall of the axial nozzle (23), and a second diversion pipe (25) is annularly installed on the outer wall of the axial nozzle (23) on one side of the first diversion pipe (24).

3. The multi-channel airflow classification drying device for biomass fuel raw materials according to claim 1, characterized in that: The semicircular member comprises a semicircular cover (3) arranged in a drying tower body (1), a first through hole (31) being provided on the right surface of the semicircular cover (3), a second through hole (32) being provided on the top surface of the semicircular cover (3), and an air jet (33) being provided on the left surface of the semicircular cover (3).

4. The multi-channel airflow classification drying device for biomass fuel raw materials according to claim 1, characterized in that: The driving member includes a slide rod (45) fixed on the top of the semicircular cover (3), one end of the slide rod (45) passes through the drying tower body (1) and extends to the outside where a connecting plate (44) is fixed, a return spring (46) is sleeved on the surface of the slide rod (45), and the two ends of the return spring (46) are fixedly connected to the connecting plate (44) and the outer wall of the drying tower body (1), respectively, an eccentric wheel (43) is attached to the surface of the connecting plate (44), and one side of the eccentric wheel (43) is fixedly connected to the output end of the first driving part (42), the first driving part (42) is mounted on the mounting seat (41), and the mounting seat (41) is fixedly mounted on the outer wall of the drying tower body (1).

5. The multi-channel airflow classification drying device for biomass fuel raw materials according to claim 4, characterized in that: A lifting rod (51) is fixedly connected to the surface of the connecting plate (44), a piston (52) is fixed to one end of the lifting rod (51), the piston (52) is slidably connected in a connecting cylinder (53), and the connecting cylinder (53) is embedded in the drying tower body (1). A sealing sleeve (54) is fixed between the piston (52) and the inner wall of the connecting cylinder (53), and the sealing sleeve (54) is sleeved on the surface of the lifting rod (51).

6. The multi-channel airflow classification drying device for biomass fuel raw materials according to claim 5, characterized in that: A guide plate (55) is fixed to the inner wall of the drying tower body (1), an exhaust pipe a (56) is fixed to one end of the connecting tube (53), one end of the exhaust pipe a (56) passes through the guide plate (55) and extends to the interior of the drying tower body (1), an exhaust pipe b (57) is fixed to the other end of the connecting tube (53), an end of the exhaust pipe b (57) passes through the guide plate (55) and extends to the interior of the drying tower body (1), one end of the connecting tube (53) is located on one side of the exhaust pipe a (56) and an exhaust pipe a (58) is fixed thereto, and the other end of the connecting tube (53) is located on one side of the exhaust pipe b (57) and an exhaust pipe b (59) is fixed thereto.

7. The multi-channel airflow classification drying device for biomass fuel raw materials according to claim 6, characterized in that: One end of the air outlet pipe b (59) is connected to the air outlet pipe a (58), and a one-way valve is provided at the connection between the air outlet pipe b (59), the air outlet pipe a (58), the air extraction pipe a (56), the air extraction pipe b (57) and the connecting tube (53), and a dustproof net is provided at the air inlet end of the air extraction pipe b (57) and the air extraction pipe a (56).

8. The multi-channel airflow classification drying device for biomass fuel raw materials according to claim 7, characterized in that: One end of the air outlet pipe a (58) passes through the inner wall of the drying tower body (1) and is fixed with a hose (581). One end of the hose (581) is fixed with an air jet disc (591). The air jet disc (591) is embedded and installed on one side outer wall of the semicircular cover (3). The air jet disc (591) is connected to the air jet port (33).

9. The multi-channel airflow classification drying device for biomass fuel raw materials according to claim 1, characterized in that: The rotating assembly comprises a rotating shaft (61) rotatably connected to the inner wall of the drying tower body (1) via a bearing, a second driving part (62) being fixed to one end of the rotating shaft (61), the second driving part (62) being mounted on the outer wall of the drying tower body (1), and a semicircular plate (63) being fixed to the surface of the rotating shaft (61).

10. The multi-channel airflow classification drying device for biomass fuel raw materials according to claim 9, characterized in that: A groove (65) is provided on the surface of the semicircular plate (63), and a protruding block (64) is slidably connected inside the groove (65). An extrusion spring (66) is fixed to one end of the protruding block (64), and one end of the extrusion spring (66) is fixed in the groove (65). One end of the protruding block (64) is rounded.

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