An internal turbulence boiling dryer and method of using same

Abstract

This invention relates to the field of fluidized bed dryer technology, and discloses an internally turbulent fluidized bed dryer and its method of use, comprising: a drying cylinder including a fluidization chamber for drying materials, wherein an internal heating element is disposed within the fluidization chamber; a storage mechanism connected to the bottom of the drying cylinder, wherein the storage chamber of the storage mechanism is connected to the fluidization chamber; and a hot air conveying mechanism connected to the storage chamber, wherein the hot air conveying mechanism is configured to blow the materials into the fluidization chamber by conveying hot air. By using the internally turbulent fluidized bed dryer and its method of use of this invention, and by setting up the internal heating element, heat is transferred from the interior of the fluidized material layer to each material particle through heat conduction, greatly improving the efficiency and uniformity of material drying; in addition, the material drying time is greatly shortened, the energy consumption of hot air circulation and heating is significantly reduced, and the long-term operating energy consumption is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of fluidized bed dryer technology, and more specifically, to an internal turbulence fluidized bed dryer and its method of use. Background Technology

[0002] Fluidized bed dryers, also known as fluidized bed dryers, are core material drying equipment in industries such as pharmaceuticals, chemicals, and food processing. Leveraging the advantages of uniform fluidized drying and suitability for granular materials, they are widely used for dehydration and drying of various solid materials. Their working principle is as follows: high-temperature hot air is directionally introduced into the equipment from the bottom of the drying cylinder, evenly penetrating the accumulated material layer. Under the action of airflow buoyancy and pressure, the material particles are suspended and tumbled, forming a fluidized state. Through forced convection heat exchange and moisture diffusion mass transfer between the hot air and the material particles, the internal moisture of the material is quickly removed, thus completing the material drying operation.

[0003] Currently, most existing fluidized bed dryers rely solely on bottom-entered hot air as their only heat source. For example, Chinese patent CN220479367U discloses a screening device based on a fluidized bed dryer, where the dryer's heat supply and material heat exchange depend entirely on externally introduced hot airflow. However, hot air can only exchange heat through convection from the outside of the material particles, resulting in slow heat penetration. This prevents the air from quickly penetrating the material accumulation layer and the interior of the particles, limiting the material's drying and heating rate and leading to low overall drying efficiency. This makes it difficult to meet the rapid drying needs of large-volume, high-humidity materials. Furthermore, to ensure the drying effect, the equipment needs to continuously supply high-temperature hot air and extend the fluidized bed drying time, significantly increasing the energy consumption for hot air circulation and heating, resulting in high long-term energy costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects in the prior art and provide an internal turbulent fluidized bed dryer and its method of use, which improves material drying efficiency and reduces energy consumption by setting a heating element in the fluidization chamber.

[0005] To achieve the above objectives, the technical solution of the present invention is to provide an internal turbulence boiling dryer, comprising: A drying cylinder includes a fluidization chamber for drying materials, wherein an internal heating element is provided in the fluidization chamber; A material storage mechanism is connected to the bottom of the drying cylinder, and the material storage chamber of the material storage mechanism is connected to the fluidization chamber; A hot air conveying mechanism is connected to the storage chamber and is configured to blow the material into the fluidization chamber by conveying hot air.

[0006] Preferably, the internal heating element is configured as at least one set of heating coils, which extend in a meandering manner in the horizontal plane, with both the medium inlet pipe and the medium outlet pipe of the heating coils penetrating the side wall of the drying cylinder. This design helps to improve the uniformity of material heating by the internal heating element.

[0007] Preferably, the internal heating element includes a first heating coil, the outer ring of which is provided with a first fin, a second fin and a third fin, the first fin being vertically disposed at the bottom of the first heating coil, and the second fin and the third fin being mirror-displayed at the top of the first heating coil; Both the second and third fins are arc-shaped fins, with their middle portions protruding in mutually distancing directions. Each of the second and third fins has a through-hole at its end closest to the first heating coil. This design significantly increases the effective heat exchange surface area per unit length of the first heating coil, thereby substantially improving the material drying efficiency.

[0008] Preferably, the internal heating element further includes a second heating coil, which is disposed above the first heating coil. The outer ring of the second heating coil is provided with a fourth fin, a fifth fin, and a sixth fin. The fourth fin is vertically disposed at the bottom of the second heating coil, and the fifth and sixth fins are mirror images disposed at the top of the second heating coil. The plane containing the fourth fin is perpendicular to the plane containing the first fin. Both the fifth and sixth fins are arc-shaped, with their central portions protruding in a direction that brings them closer together. This design helps to further improve the heat exchange efficiency of the internal heating element and increase the drying efficiency of the material.

[0009] Preferably, the material storage mechanism includes a hopper, a gas guide plate, a guide component, and a dual-rotation shear-type air distribution assembly. The top of the hopper is in close contact with the bottom of the drying cylinder. The gas guide plate is detachably connected to the bottom of the hopper and has multiple evenly distributed guide holes running through it. The guide component is fixedly connected to the top center of the gas guide plate, and the dual-rotation shear-type air distribution assembly is slidably connected to the guide component. This design facilitates the cutting and breaking down of large material clumps into smaller clumps.

[0010] Preferably, the dual-rotation shear type air distribution assembly includes, from the inside out, a sealed bearing, an inner ring blade, a first ring frame, a rotating ring, an outer ring blade, and a second ring frame. The sealed bearing is slidably connected to the outer ring of the guide member. The two ends of the inner ring blade are fixedly connected to the outer ring of the sealed bearing and the inner ring of the first ring frame, respectively. The rotating ring is rotatably connected to the outer ring of the first ring frame. The two ends of the outer ring blade are fixedly connected to the outer ring of the rotating ring and the inner ring of the second ring frame, respectively. The inner and outer fan blades rotate in opposite directions, and multiple inner and outer fan blades are arranged in a circumferential array around the axis of the guide member. This design helps to ensure the cutting effect of the dual-rotation shear-type air distribution assembly on the material layer of the outer ring.

[0011] Preferably, the guide hole includes a flared hole, a threaded hole, and a constricted hole connected sequentially from bottom to top. This design helps reduce the lateral pressure exerted by the sealed bearing on the guide component, thereby improving the service life of the guide component.

[0012] Preferably, the hot air conveying mechanism includes a filter, a heater, and a lifting assembly connected in sequence. The lifting assembly includes a base and a gas distribution plate. The base is fixedly connected to the support of the drying cylinder and has an air chamber communicating with the storage chamber. The heater is connected to the air chamber via a gas delivery pipe. The gas distribution plate is fixedly connected to the inner wall of the base and has multiple evenly distributed through holes. This design helps improve the uniformity and stability of the hot air flowing into the storage chamber.

[0013] Preferably, the storage mechanism further includes a material cart, and the material cart has U-shaped grooves on both sides, and the rotating shafts on both sides of the hopper are movably connected to the U-shaped grooves on both sides respectively; The lifting assembly also includes a lifting ring and a cylinder. The lifting ring is positioned above the gas distribution plate and is slidably connected vertically to the inner wall of the base. The cylinder is fixedly mounted on the base and is vertically driven by the lifting ring. This design facilitates material discharge.

[0014] A method of using an internal turbulence boiling dryer includes the following steps: S1. Pre-cut the material in the storage chamber; S2. Drying the material in the fluidization chamber; S3. Remove the dried material from the silo.

[0015] The beneficial effects of this invention are as follows: By using the internal turbulence fluidized bed dryer and its operating method described in this invention, an internal heating element is installed. This internal heating element transfers heat from the interior of the fluidized material layer to each material particle through heat conduction, achieving synchronous and rapid heating of all areas of the material layer. This greatly improves the efficiency and uniformity of material drying and can meet the rapid drying production needs of large-volume, high-humidity materials. In addition, the material drying time is greatly shortened, and the energy consumption of hot air circulation and heating is significantly reduced. Although the heating energy consumption of the heating element is increased, the overall energy consumption is still lower, and the long-term operating energy consumption is greatly reduced. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an internal turbulence boiling dryer; Figure 2 This is a partial three-dimensional structural diagram of an internal turbulence fluidized bed dryer; Figure 3 yes Figure 2 Front sectional view; Figure 4 yes Figure 2 A schematic diagram of the left sectional view; Figure 5 yes Figure 2 A top-view sectional diagram; Figure 6 This is a three-dimensional structural diagram of the internal heating element; Figure 7 This is a three-dimensional structural diagram of the first heating coil; Figure 8 yes Figure 7 Enlarged view of the structure at point A in the middle; Figure 9 yes Figure 7 A right-side view (the arrows in the diagram indicate the direction in which the second and third fins of the first heating coil guide the material). Figure 10 yes Figure 7 A front sectional view (the arrows in the figure indicate the direction of material guidance by the adjacent second fins or adjacent third fins of the first heating coil). Figure 11 This is a three-dimensional structural diagram of the second heating coil; Figure 12 yes Figure 11 Enlarged view of the structure at point B; Figure 13 yes Figure 11 A front view diagram (the arrows in the diagram indicate the direction in which the fifth and sixth fins of the second heating coil guide the material). Figure 14 yes Figure 11A left-side sectional view (the arrows in the diagram indicate the direction in which the material is guided by the adjacent fifth or sixth fins of the second heating coil). Figure 15 This is a three-dimensional structural diagram of the filter assembly and the dust removal assembly; Figure 16 This is a three-dimensional structural diagram of the fixed plate and the partition plate; Figure 17 This is a schematic diagram of the three-dimensional structure of the bag frame; Figure 18 This is a three-dimensional structural diagram of the gas guide plate; Figure 19 This is a three-dimensional structural diagram of a dual-rotation shear type wind equalization component; Figure 20 yes Figure 19 Enlarged view of the structure at point C; Figure 21 yes Figure 3 Enlarged view of the structure at point D; Figure 22 This is a three-dimensional structural diagram of the guide component; Figure 23 This is a three-dimensional structural diagram of the first ring frame; Figure 24 This is a schematic diagram of the three-dimensional structure of the rotating ring; Figure 25 yes Figure 3 Enlarged view of the structure at point E in the middle; Figure 26 This is a three-dimensional structural diagram of the lifting ring and the gas distribution plate; Figure 27 This is a structural diagram of the silo installation; Figure 28 yes Figure 27 Enlarged view of the structure at point F; Figure 29 This is a schematic diagram of the three-dimensional structure of the silo; Figure 30 This is a schematic diagram of the vertical movement of the dual-rotation shear type wind equalization component in step S13 of embodiment 10. Figure 31 This is a schematic diagram of the material distribution in step S21 of Example 10.

[0017] In the diagram: 1. Drying cylinder; 11. Fluidized bed; 12. Dust removal chamber; 121. Dust-laden chamber; 122. First chamber; 123. Second chamber; 13. Sealing gasket; 14. Support; 15. Observation window; 16. Feed pipe; 2. Internal heating element; 201. Medium inlet pipe; 202. Medium outlet pipe; 203. Straight pipe section; 204. Arc-shaped pipe section; 21. First heating coil; 211. First fin; 212. Second fin; 213. Third fin; 214. Drain; 22. Second heating coil; 221. Fourth fin; 222. Fifth fin; 223. Sixth fin; 3. Material storage mechanism; 301. Material storage chamber; 31. Hopper; 311. Connecting frame; 32. Gas guide plate; 320. Guide hole; 321. Flared hole; 322. Threaded hole; 323. Shrinking hole; 33. Guide component; 331. Guide groove; 34. Sealed bearing; 341. Raised strip; 35. Inner ring blade; 36. First ring frame; 361. Guide ring; 37. Rotating ring; 371. Ring groove; 38. Outer ring blade; 39. Second ring frame; 4. Hot gas conveying mechanism; 41. Filter; 42. Heater; 43. Base; 431. Gas chamber; 44. Gas distribution plate; 441. Through hole; 45. Gas pipe; 46. Lifting ring; 47. Cylinder; 48. Sealing ring; 5. Filter assembly; 51. Fixing plate; 511. Placement hole; 52. Bag frame; 53. Filter bag; 54. Divider plate; 55. Hose clamp; 61. Y-shaped pipe; 611. First air inlet pipe; 612. Second air inlet pipe; 613. Air outlet pipe; 62. First induced draft fan; 63. Electrically controlled valve; 64. Cyclone separator; 65. Second induced draft fan; 66. Silencer; 7. Dust removal assembly; 71. Air manifold; 72. Solenoid valve; 73. Air jet pipe; 74. Nozzle; 8. Material cart; 81. U-shaped groove; 82. Rotary shaft; 821. Limiting groove; 822. Thin shaft section; 83. Limiting plate; 831. Waist hole; 84. Pin; 9. Materials. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed to enable those skilled in the art to better understand and implement the subject matter described herein. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0020] In the description of this application, the technical terms "first," "second," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0021] In the description of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0022] In the description of this application, the term "multiple" means two or more, and similarly, "multiple sets" means two or more sets, and "multiple pieces" means two or more pieces, unless otherwise expressly and specifically defined.

[0023] In the description of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] In the description of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In the description of this application, unless otherwise expressly specified and limited, the use of terms such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element; if an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Where applicable, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0027] To better understand this invention, the following is combined with... Figures 1-31 The present invention provides a detailed description of an internal turbulence boiling dryer and its method of use.

[0028] Example 1: like Figures 1-4 As shown, an internal turbulence boiling dryer includes: The drying cylinder 1 includes a fluidization chamber 11 for drying material 9, and an internal heating element 2 is provided inside the fluidization chamber 11; The storage mechanism 3 is connected to the bottom of the drying cylinder 1, and the storage chamber 301 of the storage mechanism 3 is connected to the fluidization chamber 11; The hot air conveying mechanism 4 is connected to the storage chamber 301 and is configured to blow the material 9 into the fluidization chamber 11 by conveying hot air.

[0029] It should be noted that when the internal turbulent fluidized bed dryer dries the material 9, the fluidization chamber 11 is located directly above the storage chamber 301. Hot air enters the storage chamber 301 and the fluidization chamber 11 sequentially from the hot air conveying mechanism 4, blowing the material 9 up and causing the material particles to suspend and tumble to form a fluidized state. The material 9 forms a fluidized bed in the fluidization chamber 11. The internal heating element 2 is configured to be completely immersed in the fluidized material 9 when the fluidized bed is formed. The hot air conveying mechanism 4 is mainly used to blow the material 9 into the fluidization chamber 11, so that the material 9 is kept in a fluidized state and provides a small amount of heat required for drying the material 9. During the tumbling process, the fluidized material 9 is in intermittent direct contact with the internal heating element 2, and the internal heating element 2 provides most of the heat required for drying the material 9. By using the internal turbulence fluidized bed dryer of the present invention, and by setting an internal heating element 2, heat is transferred from the interior of the fluidized material layer to each material particle through heat conduction, so as to achieve synchronous and rapid heating of all areas of the material layer (including the inner and outer layers of the material layer), which greatly improves the drying efficiency and uniformity of the material 9, and can meet the production needs of rapid drying of large batches of high-humidity materials 9; in addition, the drying time of the material 9 is greatly shortened, and the energy consumption of hot air circulation and heating is significantly reduced. Although the heating energy consumption of the heating element is increased, the overall energy consumption is still lower, and the long-term operating energy consumption is greatly reduced.

[0030] Example 2: As an optimization of Example 1, such as Figure 3 , Figure 7 and Figure 11 As shown, the internal heating element 2 is configured as at least one set of heating coils, which extend in a meandering manner in the horizontal plane. The medium inlet pipe 201 and the medium outlet pipe 202 of the heating coil both pass through the side wall of the drying cylinder 1.

[0031] It should be noted that the medium inlet pipe 201 and the medium outlet pipe 202 are respectively connected to the outlet and inlet of an external heat source (such as a steam boiler or thermal oil boiler, not shown in the figure). The external heat source is used to supply high-temperature heating medium into the heating coil. The high-temperature heating medium circulates between the external heat source and the heating coil. The high-temperature heating medium uses hot steam or thermal oil. Compared with electric heating, hot steam or thermal oil heating is safer. Moreover, it can avoid the risk of combustion and explosion caused by insulation damage or local overheating of electric heating elements in dusty environments. The heating coil extends in a serpentine pattern in the horizontal plane, which helps to increase the coverage area of ​​the heating coil in the horizontal plane and ensure the uniformity of heating. This allows the heating coil to achieve maximum and fullest contact with the violently churning material 9, avoiding heating dead zones. Specifically, the heating coil includes multiple straight pipe sections 203 arranged at intervals. Adjacent straight pipe sections 203 are connected by arc pipe sections 204. Since the cross-section of the drying cylinder 1 is circular, the lengths of the multiple straight pipe sections 203 arranged along the axis away from the drying cylinder 1 decrease sequentially, thereby ensuring the uniformity of heating of the heating coil. The two straight pipe sections 203 located at both ends are connected to the medium inlet pipe 201 and the medium outlet pipe 202, respectively.

[0032] It should be emphasized that the projected area of ​​the internal heating element 2 on the cross-section of the fluidization chamber 11 accounts for 10%-20% of the cross-sectional area of ​​the fluidization chamber. On the basis of ensuring that the internal heating element 2 has a sufficient total heat exchange area, the internal heating element 2 should be prevented from blocking the hot air too much, which would lead to the formation of fluidization dead zones, material channeling, and damage to the boiling state of the fluidized material 9.

[0033] Example 3: As an optimization of Example 2, such as Figures 6-10 As shown, the internal heating element 2 includes a first heating coil 21. The outer ring of the first heating coil 21 is provided with a first fin 211, a second fin 212 and a third fin 213. The first fin 211 is vertically disposed at the bottom of the first heating coil 21, and the second fin 212 is mirror disposed at the top of the first heating coil 21. The second fin 212 and the third fin 213 are both arc-shaped fins. The middle part of the second fin 212 and the third fin 213 protrudes in a direction that is far away from each other. The middle part of the second fin 212 and the third fin 213 near the first heating coil 21 is provided with a through hole 214.

[0034] It should be noted that by setting fins (including the first fin 211, the second fin 212 and the third fin 213), the effective heat exchange surface area per unit length of the first heating coil 21 is greatly increased, so that the heat carried by the high temperature heating medium inside the first heating coil 21 can be transferred to the outside of the first heating coil 21 more quickly and efficiently. Specifically, on the one hand, the fins are an extension of the first heating coil 21. The fins can quickly absorb the heat from the high-temperature heating medium. The direct contact between the tumbling material 9 and the fins can significantly improve the drying efficiency of the material 9. On the other hand, the fins can assist the first heating coil 21 in quickly transferring heat to the drying cylinder 1, rapidly increasing the room temperature of the fluidization chamber 11, greatly shortening the warm-up time, reducing heat loss during the warm-up process, and improving the drying efficiency of the material 9. Existing fluidized bed dryers require a long warm-up time, and hot air continuously flows out of the drying cylinder 1 during the warm-up process, resulting in significant heat loss. The first fin 211 is a flat fin, and multiple first fins 211 are provided, and the multiple first fins 211 are arranged at intervals along the extension direction of the first heating coil 21. In the fluidization chamber 11, the hot air rising through the storage mechanism 3 easily converges into large-diameter "bubbles". The hot air in the center area of ​​these large bubbles is almost isolated from the material 9 outside the large bubbles. After the large bubbles rise rapidly, they are discharged from the drying cylinder 1, but the heat exchange between the hot air in the center area of ​​the large bubbles and the material 9 is very small, resulting in heat energy waste. During the rise of the large bubbles, the vertically arranged first fins 211 can effectively cut the large bubbles into small bubbles, thereby increasing the contact area between the hot air and the material 9, ensuring that the hot air can fully exchange heat with the material 9, thereby improving the utilization rate of heat energy, reducing heat energy loss, and reducing drying costs. The middle part of the second fin 212 protrudes away from the third fin 213, or in other words, the two ends of the second fin 212 are raised towards the third fin 213. Multiple second fins 212 are provided, and the multiple second fins 212 are arranged at intervals along the extension direction of the first heating coil 21. During the tumbling process of the fluidized material 9, the side of two adjacent second fins 212 that are close to each other can guide the flow of the material 9. When the material 9 rises, it guides the direction of the material 9's rise, so that the material 9 collides with each other in the direction of the symmetrical plane of the two adjacent second fins 212. This helps to break up the agglomerated material clumps, increase the contact area between the material 9 and the hot air, and thus improve the drying efficiency and drying effect of the material 9. The middle portion of the third fin 213 protrudes away from the second fin 212, or in other words, both ends of the third fin 213 curve towards the second fin 212. Multiple third fins 213 are provided, spaced apart along the extension direction of the first heating coil 21, with each third fin 213 corresponding to a second fin 212. Two adjacent third fins 213 can serve the same guiding function as two adjacent second fins 212, which will not be elaborated further here. Furthermore, the first heating coil 2... In the two adjacent straight pipe sections 203 of 1, the second fin 212 and the third fin 213 on the pipe wall that are close to each other are inclined upward along the direction of their proximity. The second fin 212 and the third fin 213 can also guide the flow of material 9. When material 9 rises, it guides the upward direction of material 9, so that material 9 collides with each other in the direction of the symmetrical plane of the two adjacent straight pipe sections 203. This is also conducive to breaking up the agglomerated material 9, thereby further improving the drying efficiency and drying effect of material 9. The mirror symmetry planes of the second fin 212 and the third fin 213 are the vertical symmetry planes of the corresponding straight pipe section 203. By setting a drain 214 at the center of the root of the second fin 212 and the third fin 213 (i.e., the connection between the second fin 212 and the third fin 213 and the first heating coil 21), it is possible to facilitate the material particles to fall through the drain 214, and avoid the material 9 from accumulating in the gap between the second fin 212 or the third fin 213 and the first heating coil 21, which would cause the material 9 to become over-dried and deteriorate. If the deteriorated material 9 is continued to be heated at high temperature, it will coke and break, and thus fall into the material layer through the drain 214, contaminating the other material 9. Moreover, the coked and broken material 9 is difficult to separate, which seriously affects the overall quality of the material 9.

[0035] In this embodiment, the number of the first fin 211, the second fin 212, and the third fin 213 are the same and their positions correspond one-to-one. The first fin 211, the second fin 212, and the third fin 213 are all welded and fixed to the outer ring of the first heating coil 21.

[0036] Example 4: As an optimization of Example 3, such as Figure 6 , Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, the internal heating element 2 also includes a second heating coil 22, which is disposed above the first heating coil 21. The outer ring of the second heating coil 22 is provided with a fourth fin 221, a fifth fin 222 and a sixth fin 223. The fourth fin 221 is vertically disposed at the bottom of the second heating coil 22, and the fifth fin 222 and the sixth fin 223 are mirror images disposed at the top of the second heating coil 22. The plane where the fourth fin 221 is located is perpendicular to the plane where the first fin 211 is located. The fifth fin 222 and the sixth fin 223 are both arc-shaped fins, and the middle of the fifth fin 222 and the sixth fin 223 protrudes in the direction of mutual proximity.

[0037] It should be noted that both the first heating coil 21 and the second heating coil 22 are set horizontally. The straight section 203 of the second heating coil 22 is perpendicular to each other. The first fin 211 and the fourth fin 221 form a crisscross cutting mesh, which is beneficial to cutting large bubbles into smaller bubbles and further improving the utilization rate of thermal energy. The fourth fin 221 is also flat. The middle part of the fifth fin 222 protrudes towards the sixth fin 223, or in other words, the two ends of the fifth fin 222 curve away from the sixth fin 223. The middle part of the sixth fin 223 protrudes towards the fifth fin 222, or in other words, the two ends of the sixth fin 223 curve away from the fifth fin 222. Multiple fourth fins 221, fifth fins 222 and sixth fins 223 are provided, and they are all arranged at intervals along the extension direction of the second heating coil 22. The side of two adjacent fifth fins 222 that are close to each other can guide the flow of material 9, guiding material 9 to descend when it rises and guiding the direction of material 9's descent, so that material 9 collides with each other in the direction of the symmetrical plane of the two adjacent fifth fins 222; two adjacent sixth fins 223 can play the same guiding role as the two adjacent fifth fins 222, which will not be described in detail here. Furthermore, the mirror symmetry planes of the fifth fin 222 and the sixth fin 223 are also the vertical symmetry planes of the corresponding straight pipe sections 203. In the two adjacent straight pipe sections 203 of the second heating coil 22, the fifth fin 222 and the sixth fin 223 on the pipe walls that are close to each other are inclined upwards in the direction of approaching each other. The fifth fin 222 and the sixth fin 223 can also guide the flow of the material 9, guiding the upward direction of the material 9 when it rises, so that the material 9 collides with each other in the direction of the symmetry planes of the two adjacent straight pipe sections 203.

[0038] In this embodiment, the second heating coil 22 is located directly above the first heating coil 21. The fourth fin 221, the fifth fin 222 and the sixth fin 223 are the same in number and their positions correspond one-to-one. The fourth fin 221, the fifth fin 222 and the sixth fin 223 are all welded and fixed to the outer ring of the second heating coil 22. The total projection of the first heating coil 21 and the second heating coil 22 on the cross-section of the fluidization chamber 11 accounts for 13%-17% of the cross-sectional area of ​​the fluidization chamber, ensuring that the internal heating element 2 provides most of the heat required for drying the material 9. The fluidization hot air mainly undertakes the function of maintaining the boiling state of the material 9 and carrying the evaporated water vapor, and provides a small part of the heat required for drying the material 9. like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 15 , Figure 16 and Figure 17As shown, the drying cylinder 1 also includes a dust removal chamber 12 located above the fluidization chamber 11. A filter assembly 5 is provided in the dust removal chamber 12. The filter assembly 5 includes a fixed plate 51, a bag frame 52, a filter bag 53, and a partition plate 54. The fixed plate 51 is located above the inner heating element 2. The fixed plate 51 is fixedly connected to the inner wall of the drying cylinder 1 and divides the dust removal chamber 12 into a lower dust-containing chamber 121 and an upper clean air chamber. The dust-containing chamber 121 is located between the fluidization chamber 11 and the clean air chamber. The outer ring of the fixed plate 51 is fitted to the inner wall of the drying cylinder 1. The fixed plate 51 is provided with multiple placement holes 511. The bag frame 52 is inserted through the placement holes 511 and is fixedly connected to the fixed plate 51. The filter bag 53 is fitted on the outer ring of the bag frame 52 and is located in the dust chamber 121. The filter bag 53 is fixed to the bag frame 52 by a hose clamp 55. By setting the filter assembly 5, the filter bag 53 can play a filtering and blocking role, preventing the material 9 in the dust-containing chamber 121 from entering the clean air chamber and escaping, thus reducing the waste of material 9, while the gas can escape through the gaps in the filter bag 53 itself; and by using the fifth fin 222 and the sixth fin 223 to guide the rising material 9 to fall, the probability of material 9 entering the dust-containing chamber 121 can be reduced, which is conducive to further reducing the waste of material 9, and also helps to reduce the probability of material 9 adhering to the outer periphery of the filter bag 53, thus reducing the difficulty of cleaning the filter bag 53. The partition plate 54 is fixedly connected to the top of the fixed plate 51, and the top of the partition plate 54 is fixedly connected to the top inner wall of the drying cylinder 1. The partition plate 54 divides the clean air chamber into a first chamber 122 and a second chamber 123. The drying cylinder 1 is connected to the first induced draft fan 62 through a Y-shaped pipe 61. The first air inlet pipe 611 of the Y-shaped pipe 61 is connected to the first chamber 122, and the second air inlet pipe 612 of the Y-shaped pipe 61 is connected to the second chamber 123. Both the first air inlet pipe 611 and the second air inlet pipe 612 are equipped with an electric control valve 63. The two electric control valves 63 are used to control the opening and closing of the first air inlet pipe 611 and the second air inlet pipe 612, respectively. One end of the air outlet pipe 613 of the Y-shaped pipe 61 is connected to the first induced draft fan 62, and the other end is connected to the first air inlet pipe 611 and the second air inlet pipe 612. like Figure 2 and Figure 15 As shown, a dust removal assembly 7 is installed in the clean air chamber. The dust removal assembly 7 includes an air tank 71, a solenoid valve 72, and a jet pipe 73. The jet pipe 73 passes through the drying cylinder 1. One end of the jet pipe 73 extends out of the drying cylinder 1 and is connected to the air tank 71 through the solenoid valve 72. The other end of the jet pipe 73 extends into the clean air chamber. Multiple jet pipes 73 are arranged along the length of the air tank 71. Each jet pipe 73 is controlled by a solenoid valve 72. The multiple jet pipes 73 are distributed in the first chamber 122 and the second chamber 123. The jet pipes 73 are connected to nozzles 74 facing the bag opening of the filter bag 53. The number of nozzles 74 of the dust removal assembly 7 is the same as the number of filter bags 53 and corresponds one-to-one. The air tank 71 stores high-pressure air. Compressed air is pumped into the air tank 71 by an external air compressor (not shown in the figure) to ensure that there is always enough high-pressure air in the air tank 71. At the same time, only the first chamber 122 or only the second chamber 123 is connected to the outlet pipe 613. When the first chamber 122 is connected to the outlet pipe 613, the filter bag 53 corresponding to the first chamber 122 plays a major filtering role. Hot air enters the first chamber 122 through the filter bag 53 corresponding to the first chamber 122, and then enters the first induced draft fan 62 through the first inlet pipe 611 and the outlet pipe 613 in sequence, and is discharged from the outlet of the first induced draft fan 62. The filter bag 53 corresponding to the second chamber 123 is cleaned, and the corresponding solenoid valve 72 is opened in sequence, allowing high-pressure air to enter the corresponding chamber. High-pressure air is injected into the jet pipe 73 and from the nozzle 74 of the jet pipe 73 into the bag opening of the filter bag 53 corresponding to the second chamber 123. The high-pressure air impacts the inner wall of the filter bag 53, thereby shaking off the material 9 attached to the outer periphery of the filter bag 53, preventing the material 9 from clogging the gaps of the filter bag 53 and affecting the passage of hot air through the filter bag 53; conversely, when the filter bag 53 corresponding to the second chamber 123 plays the main filtration role, the filter bag 53 corresponding to the first chamber 122 is cleaned. The specific process is not described in detail, thus ensuring that the internal turbulence fluidized bed dryer can operate stably for a long time. like Figure 1 As shown, the internal turbulence fluidized bed dryer also includes a cyclone separator 64, a second induced draft fan 65, and a silencer 66. The inlet of the cyclone separator 64 is connected to the outlet of the first induced draft fan 62, the outlet of the cyclone separator 64 is connected to the inlet of the second induced draft fan 65, and the outlet of the second induced draft fan 65 is connected to the inlet of the silencer 66. By setting up the cyclone separator 64, the fine dust material 9 carried by the hot air can be collected for reuse. By setting up the silencer 66, the operating noise of the internal turbulence fluidized bed dryer can be reduced.

[0039] Example 5: As an optimization of Example 4, such as Figure 2 , Figure 3 , Figure 4 , Figure 18 , Figure 19 , Figure 20 As shown, the storage mechanism 3 includes a hopper 31, a gas guide plate 32, a guide member 33, and a dual-rotation shear type air distribution assembly. The top of the hopper 31 is in contact with the bottom of the drying cylinder 1. The gas guide plate 32 is detachably connected to the bottom of the hopper 31. The gas guide plate 32 is provided with a plurality of evenly distributed guide holes 320. The guide member 33 is fixedly connected to the top center of the gas guide plate 32. The dual-rotation shear type air distribution assembly is slidably connected to the guide member 33. The dual-rotation shear type air distribution assembly includes a sealed bearing 34, an inner ring blade 35, a first ring frame 36, a rotating ring 37, an outer ring blade 38, and a second ring frame 39 arranged sequentially from the inside out. The sealed bearing 34 is slidably connected to the outer ring of the guide member 33. The two ends of the inner ring blade 35 are fixedly connected to the outer ring of the sealed bearing 34 and the inner ring of the first ring frame 36, respectively. The rotating ring 37 is rotatably connected to the outer ring of the first ring frame 36. The two ends of the outer ring blade 38 are fixedly connected to the outer ring of the rotating ring 37 and the inner ring of the second ring frame 39, respectively. When hot air blows vertically upwards onto the dual-rotation shear-type air distribution component, the inner fan blade 35 and the outer fan blade 38 rotate in opposite directions, and multiple inner fan blades 35 and outer fan blades 38 are arranged in a circumferential array around the axis of the guide member 33.

[0040] It should be noted that, as Figure 21 As shown, the drying cylinder 1 and the hopper 31 are sealed by an annular sealing gasket 13. The sealing gasket 13 is fixedly connected to the bottom surface of the drying cylinder 1. Openings are provided at the top and bottom of the hopper 31. The gas guide plate 32 is detachably connected to the bottom of the hopper 31 by bolts and nuts. In a clockwise direction, the inner fan blade 35 and the outer fan blade 38 are tilted in opposite directions. The tilt directions of the inner fan blade 35 and the outer fan blade 38 include the following two methods: Method 1: In a clockwise direction, the inner fan blade 35 is inclined upwards and the outer fan blade 38 is inclined downwards. When hot air blows from bottom to top onto the dual-rotation shear type air distribution component, the dual-rotation shear type air distribution component moves upwards along the guide 33 by one distance. At the same time, under the blowing of hot air, the inner fan blade 35 rotates counterclockwise and the outer fan blade 38 rotates clockwise. Method 2: In a clockwise direction, the inner fan blade 35 is inclined downwards and the outer fan blade 38 is inclined upwards. When hot air blows from bottom to top onto the dual-rotation shear type air distribution component, the dual-rotation shear type air distribution component moves upwards along the guide 33 by one distance. At the same time, under the blowing of hot air, the inner fan blade 35 rotates clockwise and the outer fan blade 38 rotates counterclockwise. Regardless of the method used, the inner fan blade 35 and the outer fan blade 38 rotate in opposite directions. By designing a dual-rotation shear-type air distribution component, the inner fan blade 35 and the outer fan blade 38 can pre-cut the material 9. During the pre-cutting process, the material 9 is mainly located in the storage chamber 301. The suction force of the first induced draft fan 62 is relatively small. During the rotation, the inner fan blade 35 and the outer fan blade 38 cut or break up the larger material clumps formed by agglomeration, cutting the large material clumps into smaller material clumps. This allows the smaller material clumps to collide with each other and form smaller material particles under the guidance of the fins of the internal heating element 2, which is beneficial to improving the drying efficiency and drying effect of the material 9. The number of outer ring blades 38 is greater than the number of inner ring blades 35, thus ensuring that the density of outer ring blades 38 is appropriate, thereby ensuring the cutting effect of outer ring blades 38. If only one ring of blades is set, the cutting effect of the outer ring material layer is poor, the pre-cutting time is longer, and the drying efficiency of material 9 will be reduced; the second ring frame 39 is used to improve the rotation stability of outer ring blades 38. By adjusting the suction force of the first induced draft fan 62, the dual-rotation shear type air distribution component can slide up and down along the guide 33, thereby cutting material layers of different heights and ensuring the cutting effect and uniformity of the material layers. In addition, by designing a dual-rotation shear-type air distribution component, the inner fan blade 35 and the outer fan blade 38 can also cut the bubbles during the drying process of material 9, cutting large bubbles into small bubbles. Even if the small bubbles subsequently converge into larger bubbles, they will be cut into small bubbles again by the fins. Through the dual cutting action of the dual-rotation shear-type air distribution component and the fins, it is greatly ensured that the hot air can have sufficient heat exchange with material 9. Moreover, when hot air passes through the guide hole 320, the airflow is not completely uniform and may form channel (local airflow short circuit). The fan blades corresponding to the channel will obtain greater thrust due to the concentrated airflow and rotate faster, thereby disrupting the channel and redistributing the concentrated airflow to the surrounding area, thereby improving the uniformity of hot airflow in the fluidization chamber 11, which is beneficial to improving the uniformity of drying of material 9. Furthermore, the dual-rotation shear type air distribution unit does not require an external drive source and is driven only by hot air, which helps to reduce energy consumption.

[0041] It is important to emphasize that the dual-rotation shear-type air distribution assembly is made of lightweight and high-strength materials to facilitate the blowing of hot air. Preferably, all structures of the dual-rotation shear-type air distribution assembly are made of 30wt% carbon fiber reinforced polyetheretherketone (CF30 / PEEK) composite material to meet the requirements of lightweight and high strength. Polyetheretherketone has good heat resistance, which can be adapted to the long-term high-temperature environment inside the dryer. Polyetheretherketone has good self-lubricating properties and a low coefficient of friction, which can ensure the smooth relative rotation between the first ring frame 36 and the rotating ring 37, ensuring the stability and reliability of the dual-rotation shear-type air distribution assembly, and helping to reduce frictional heat generation and improve the service life of the dual-rotation shear-type air distribution assembly. The 30% carbon fiber reinforcement greatly improves the resistance to material impact and deformation of the dual-rotation shear-type air distribution assembly, which helps to reduce the maintenance cost of the dual-rotation shear-type air distribution assembly.

[0042] In this embodiment, as Figure 20 and Figure 22As shown, the guide 33 is a hollow tube, and the outer ring of the guide 33 has multiple vertical guide grooves 331. The inner ring of the sealed bearing 34 is fixedly connected with multiple vertical protrusions 341. The protrusions 341 are slidably connected to the guide grooves 331 and correspond one to one. In the natural state, the bottom end face of the protrusion 341 is in contact with the bottom inner wall of the guide groove 331. There is a gap between the dual-rotation shear type air distribution component and the gas guide plate 32. In the extreme state of the dual-rotation shear type air distribution component rising, the top end face of the protrusion 341 is in contact with the top inner wall of the guide groove 331, thereby preventing the dual-rotation shear type air distribution component from detaching from the guide 33. like Figure 19 , Figure 23 and Figure 24 As shown, a guide ring 361 is fixedly connected to the center of the outer ring of the first ring frame 36, and an annular groove 371 is provided on the inner ring of the rotating ring 37 to rotate and cooperate with the guide ring 361, thereby ensuring the stability and reliability of the rotational connection between the rotating ring 37 and the first ring frame 36.

[0043] It should be emphasized that, under actual working conditions, the outer ring of the guide member 33 can also be provided with an outwardly protruding guide strip. In this case, the inner ring of the sealed bearing 34 is provided with a groove that slides and connects with the guide strip, and the top and bottom of the guide strip are provided with limiting blocks to prevent the sealed bearing 34 from detaching from the guide member 33 during the up and down sliding process. This design can effectively prevent the material 9 from getting stuck in the guide fit structure between the sealed bearing 34 and the guide member 33, thereby preventing the material 9 from affecting the up and down sliding of the dual-rotation shear type air distribution component on the guide member 33.

[0044] Example 6: As an optimization of Example 5, such as Figure 19 As shown, the inner fan blade 35 protrudes along its rotation direction, while the outer fan blade 38 protrudes away from its rotation direction.

[0045] It should be noted that the inner fan blade 35 protrudes along its rotation direction to form an arc-shaped fan blade, and the outer fan blade 38 protrudes in the direction opposite to its rotation direction to form an arc-shaped fan blade. For example, when the inner fan blade 35 rotates counterclockwise, the middle part of the inner fan blade 35 protrudes counterclockwise, and when the outer fan blade 38 rotates clockwise, the middle part of the outer fan blade 38 protrudes counterclockwise. With this design, when the inner fan blade 35 rotates, the inner fan blade 35 will push the inner layer of material 9 outward, and the outer fan blade 38 will push the outer layer of material 9 inward, so that the inner and outer layers of material 9 collide with each other. This helps to break up large material clumps into smaller material clumps and also helps to drive the material 9 piled up in the dead zone (such as the material 9 on the outer edge of the guide 33 and the material 9 on the inner edge of the bottom of the hopper 31) to move towards the middle layer, so that the material 9 in the dead zone can also be blown up and dried, ensuring the overall drying effect of the material 9.

[0046] Example 7: As an optimization of Example 6, such as Figure 3 , Figure 18 and Figure 25 As shown, the guide hole 320 includes a flared hole 321, a threaded hole 322, and a constricted hole 323 connected sequentially from bottom to top.

[0047] It should be noted that the flared hole 321, the threaded hole 322 and the constricted hole 323 are coaxially arranged. Along the direction away from the threaded hole 322, the radial dimension of the flared hole 321 gradually increases and the radial dimension of the constricted hole 323 gradually decreases. By setting the flared hole 321, it is beneficial for hot air to pass through the guide hole 320. By setting the threaded hole 322, the threaded groove of the threaded hole 322 will comb the hot air entering from the flared hole 321 into an airflow that rotates around the hole axis and is symmetrical as a whole. This makes the vector sum of the lateral forces on the inner fan blade 35 and the outer fan blade 38 approach zero. The resultant force of the hot air blown through the guide hole 320 on the dual-rotation shear type air distribution component tends to be vertically upward. This helps to reduce the lateral extrusion force of the sealed bearing 34 on the guide member 33 and avoid the situation where the sealed bearing 34 gets stuck on the guide member 33 and cannot move up and down. Moreover, the radial dimension of the guide member 33 cannot be too large, which leads to a reduction in the bending strength of the guide member 33. By reducing the lateral extrusion force on the guide member 33, it is beneficial to improve the service life of the guide member 33 and reduce maintenance costs. The design of the constriction hole 323 helps to increase the air pressure of the airflow blown out from the constriction hole 323, thereby ensuring sufficient buoyancy for the dual-rotation shear type air distribution component, ensuring the rotation of the inner fan blade 35 and the outer fan blade 38. Moreover, the design of the constriction hole 323 also helps to reduce the probability of material 9 falling from the constriction hole 323 to below the gas guide plate 32, which helps to reduce the waste of material 9.

[0048] It should be emphasized that the spiral direction of the threaded hole 322 of the guide hole 320 corresponding to the inner ring fan blade 35 is the same as the rotation direction of the inner ring fan blade 35, and the spiral direction of the threaded hole 322 of the guide hole 320 corresponding to the outer ring fan blade 38 is the same as the rotation direction of the outer ring fan blade 38. This ensures that the hot air blown out through the guide hole 320 has a beneficial driving effect on the rotation of the inner ring fan blade 35 and the outer ring fan blade 38. For example, when the inner ring fan blade 35 rotates counterclockwise, the spiral direction of the threaded hole 322 of the guide hole 320 within the projection range of the first ring frame 36 on the gas guide plate 32 is counterclockwise, the outer ring fan blade 38 rotates clockwise, and the spiral direction of the threaded hole 322 of the remaining guide holes 320 is clockwise.

[0049] Example 8: As an optimization of Example 7, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 26 As shown, the hot gas conveying mechanism 4 includes a filter 41, a heater 42, and a lifting assembly connected in sequence. The lifting assembly includes a base 43 and a gas distribution plate 44. The base 43 is fixedly connected to the support 14 of the drying cylinder 1. The base 43 is provided with a gas chamber 431 that communicates with the storage chamber 301. The heater 42 is connected to the gas chamber 431 through a gas delivery pipe 45. The gas distribution plate 44 is fixedly connected to the inner wall of the base 43. The gas distribution plate 44 is provided with a plurality of evenly distributed through holes 441.

[0050] It should be noted that, along the vertical direction, at least one layer of gas distribution plate 44 is provided inside the base 43. The outer ring of the gas distribution plate 44 is attached to the inner wall of the base 43. Under the suction of the first blower 62, the outside air passes through the filter 41 and is filtered to ensure that the hot air entering the drying cylinder 1 is clean and to avoid contamination of the material 9, which would affect the performance and quality of the material 9. The clean air then enters the heater 42 and is heated. Hot air enters the air chamber 431 through the air pipe 45 and flows upward. The gas distribution plate 44, through its own plate body, makes the gas pressure at the same height in the air chamber 431 more uniform. At the same time, the gas distribution plate 44 guides the upward hot air to be evenly distributed in the horizontal plane through its evenly distributed through holes 441. By designing the gas distribution plate 44, the hot air flowing to the storage chamber 301 is rectified and pressure equalized in advance, which helps to improve the uniformity and stability of the hot air flowing into the storage chamber 301. This makes the resultant force of the hot air on the dual-rotation shear-type air distribution component more vertically upward, further reducing the lateral extrusion force of the sealed bearing 34 on the guide component 33. This ensures the stable operation of the dual-rotation shear-type air distribution component and further improves the service life of the guide component 33. Preferably, the through holes 441 and the guide holes 320 are staggered. With this design, the airflow flowing up through the through holes 441 will impact the plate of the gas guide plate 32. Thus, the gas guide plate 32 can rectify and equalize the hot airflow between itself and the gas distribution plate 44, further improving the uniformity and stability of the hot air blowing up through the guide holes 320 onto the dual-rotation shear type air distribution component.

[0051] Example 9: As an optimization of Example 8, such as Figure 1 , Figure 4 , Figure 26 , Figure 27 and Figure 28 As shown, the storage mechanism 3 also includes a material cart 8, and U-shaped grooves 81 are provided on both sides of the material cart 8. The rotating shafts 82 on both sides of the hopper 31 are movably connected to the U-shaped grooves 81 on both sides respectively. The lifting assembly also includes a lifting ring 46 and a cylinder 47. The lifting ring 46 is positioned above the gas distribution plate 44 and is slidably connected to the inner wall of the base 43. The cylinder 47 is fixedly mounted on the base 43 and is driven vertically by the lifting ring 46.

[0052] It should be noted that, as Figure 28 and Figure 29 As shown, the outer ring of the rotating shaft 82 is provided with a ring-shaped limiting groove 821. The rotating shaft 82 forms a thin shaft section 822 at the limiting groove 821. The thin shaft section 822 is movably connected to the U-shaped groove 81. Specifically, the thin shaft section 822 can rotate in the U-shaped groove 81 and can also move up and down in the U-shaped groove 81. The rotating shaft 82 is fixedly connected to the hopper 31, and the hopper 31 moves synchronously with the rotating shaft 82. A limiting plate 83 is fixedly connected to one of the rotating shafts 82. The limiting plate 83 is provided with a waist hole 831 extending in the vertical direction. A pin 84 is inserted into the material cart 8. The other end of the pin 84 is inserted into the waist hole 831, thereby restricting the rotation of the rotating shaft 82 and the hopper 31, but not affecting the up and down movement of the thin shaft section 822 in the U-shaped groove 81. When the pin 84 is pulled out and the pin 84 is disengaged from the waist hole 831, the hopper 31 can rotate, thereby facilitating the pouring out of the material 9 in the hopper 31. Before drying, the moving trolley 8 moves the hopper 31 between the lifting ring 46 and the drying cylinder 1. Then, the cylinder 47 drives the lifting ring 46 to rise, and the lifting ring 46 pushes the hopper 31 to rise until the top of the hopper 31 presses against the sealing gasket 13 to ensure the sealing performance of the internal turbulent fluidized bed dryer. During this process, the pin 84 remains inserted into the waist hole 831. After material 9 is dried, both the first induced draft fan 62 and the second induced draft fan 65 stop sucking air. After standing still for a period of time, the moving material cart 8 moves the hopper 31 to the outside of the internal turbulent fluidized bed dryer, pulls out the pin 84, slowly rotates the hopper 31, and pours the material 9 into the collection container.

[0053] It needs to be emphasized that, such as Figure 2 As shown, the state of the material 9 inside the drying cylinder 1 and the hopper 31 can be observed through the observation window 15. The material 9 is poured out only after it has completely fallen into the hopper 31, thus avoiding the situation where the material 9 is poured out before it has completely fallen into the hopper 31, which would result in waste of the material 9.

[0054] In this embodiment, as Figure 4As shown, the hopper 31 is fixedly connected to the bracket 14 via the connecting frames 311 on both sides. The fixed end of the cylinder 47 is fixedly connected to the connecting frame 311. The telescopic end of the cylinder 47 is fixedly connected to the lifting ring 46. The lifting ring 46 and the base 43 are sealed by a sealing ring 48. The sealing ring 48 is fixedly installed in the base 43. The inner ring of the sealing ring 48 slides against the bottom outer ring of the lifting ring 46. The gas distribution plate 44 is fixedly connected to the bottom of the lifting ring by screws. The top outer ring of the lifting ring 46 is provided with a relief groove corresponding to the bolt and nut to avoid interference between the bolt and nut used to connect the gas guide plate 32 and the hopper 31 and the lifting ring 46, and to ensure the overall airtightness of the internal turbulent fluidized bed dryer. In addition, an elastic sealing ring (not shown in the figure) can also be provided between the outer ring of the lifting ring 46 and the gas guide plate 32 for sealing. The sealing ring can be fixedly installed on the top of the lifting ring 46. like Figure 2 As shown, a feed pipe 16 communicating with a fluidization chamber 11 is fixedly connected to the outer wall of the drying cylinder 1. The feed pipe 16 is inclined downward along the axis near the drying cylinder 1. The material 9 is conveyed into the feed pipe 16 by an external conveying mechanism (not shown in the figure). For example, the conveying mechanism includes a feeder, a star feeder and a feed hopper connected in sequence. The feeder feeds the material 9 into the star feeder, and the star feeder conveys the material 9 into the drying cylinder 1 through the feed hopper and the feed pipe 16.

[0055] Example 10: A method of using an internal turbulence boiling dryer includes the following steps: S1. Pre-cut the material 9 in the storage chamber 301; S2. The material 9 is dried in the fluidization chamber 11; S3. Remove the dried material 9 from the silo 31.

[0056] It should be noted that S1 includes the following steps: S11. Start the first induced draft fan 62 and the second induced draft fan 65, and start the internal heating element 2; S12. The material to be dried 9 is conveyed from the feed pipe 16 into the drying cylinder 1; S13. The material 9 to be dried falls into the storage chamber 301, and the inner fan blade 35 and the outer fan blade 38 pre-cut the material 9.

[0057] Specifically, in S11, starting the internal heating element 2 means starting the external heat source to circulate the high-temperature heating medium to the first heating coil 21 and the second heating coil 22, thereby preheating the fluidization chamber 11. In S13, the suction force of the first induced draft fan 62 changes periodically, causing the dual-rotation shear type air distribution component to move up and down on the guide 33, pre-cutting the material 9 at different heights in the storage chamber 301, ensuring the uniformity and reliability of the pre-cutting.

[0058] S2 includes the following steps: S21, the suction force of the first induced draft fan 62 and the second induced draft fan 65 is adjusted to the preset value, and the hot air blows the material 9 in the storage chamber 301 into the fluidization chamber 11; S22, the dust removal component 7 intermittently and alternately performs dust removal treatment on the filter bags 53 corresponding to the first chamber 122 and the second chamber 123 respectively.

[0059] Specifically, in S22, when the first chamber 122 is connected to the outlet duct 613, the filter bag 53 corresponding to the first chamber 122 filters the material 9, and the hot air in the dust-containing chamber 121 enters the first induced draft fan 62 through the first chamber 122 and the first inlet duct 611. The second inlet duct 612 is closed, and the nozzle 74 in the second chamber 123 sprays air to clean the corresponding filter bag 53. When the second chamber 123 is connected to the outlet duct 613, the filter bag 53 corresponding to the second chamber 123 filters the material 9, and the hot air in the fluidization chamber 11 and the dust-containing chamber 121 enters the first induced draft fan 62 through the second chamber 123 and the second inlet duct 612. The first inlet duct 611 is closed, and the nozzle 74 in the first chamber 122 sprays air to clean the corresponding filter bag 53.

[0060] It should be emphasized that in process S1, hot air and internal heating element 2 perform preliminary drying treatment on material 9; in the drying of material 9 in S2, internal heating element 2 provides more than 90% of the heat required for drying of material 9, while hot air provides no more than 10% of the heat required for drying of material 9. The main function of hot air is to maintain the fluidized state of material 9, so that material 9 can circulate and fully contact internal heating element 2, thereby greatly improving the drying efficiency and uniformity of material 9; in S21, although most of material 9 is located in fluidization chamber 11, a small portion of material 9 will fall into hopper 31 during the falling process and be blown back into fluidization chamber 11.

[0061] S3 includes the following steps: S31. Turn off the first induced draft fan 62, the second induced draft fan 65 and the internal heating element 2; S32. After a preset set time of settling, the hopper 31 is moved out by the moving material cart 8; S33. Pull out the pin 84, rotate the hopper 31, and pour the material 9 into the collection device; S34, hopper 31, pin 84 and trolley 8 are reset.

[0062] Specifically, in S32, after confirming through the observation window 15 that all materials 9 have fallen into the hopper 31, the cylinder 47 drives the lifting ring 46 to descend, and the hopper 31 descends synchronously with the lifting ring 46 and separates from the drying cylinder 1. In S34, first rotate the hopper 31 to restore its axis to a vertical state, then insert the pin 84 into the waist hole 831, and then push the trolley 8 to move the hopper 31 between the lifting ring 46 and the drying cylinder 1, with the lifting ring 46, hopper 31 and drying cylinder 1 coaxial. After that, the cylinder 47 drives the lifting ring 46 to rise, and the lifting ring 46 pushes the hopper 31 to rise until the top of the hopper 31 presses against the sealing gasket 13.

[0063] The embodiments of the invention have been described above with reference to the accompanying drawings. However, the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments without departing from the spirit of the embodiments and the scope of protection of the claims, and all of these forms are within the protection scope of the embodiments.

Claims

1. An internal turbulence boiling drier characterized by, include: The drying cylinder (1) includes a fluidization chamber (11) for drying materials (9), and an internal heating element (2) is provided in the fluidization chamber (11). The storage mechanism (3) is connected to the bottom of the drying cylinder (1), and the storage chamber (301) of the storage mechanism (3) is connected to the fluidization chamber (11); A hot air conveying mechanism (4) is connected to the storage chamber (301) and is configured to blow the material (9) into the fluidization chamber (11) by conveying hot air.

2. The internal turbulent flow boiling dryer according to claim 1, wherein The internal heating element (2) is configured as at least one set of heating coils, which extend in a meandering manner in the horizontal plane. The medium inlet pipe (201) and the medium outlet pipe (202) of the heating coils both pass through the side wall of the drying cylinder (1).

3. The internal turbulent flow boiling dryer according to claim 2, wherein The internal heating element (2) includes a first heating coil (21), the outer ring of which is provided with a first fin (211), a second fin (212) and a third fin (213). The first fin (211) is vertically disposed at the bottom of the first heating coil (21), and the second fin (212) is mirror disposed at the top of the first heating coil (21). The second fin (212) and the third fin (213) are both arc-shaped fins. The middle part of the second fin (212) and the third fin (213) protrudes in a direction away from each other. The middle part of the second fin (212) and the third fin (213) near the first heating coil (21) is provided with a hole (214).

4. The internal turbulence boiling dryer according to claim 3, characterized in that, The internal heating element (2) further includes a second heating coil (22), which is disposed above the first heating coil (21). The outer ring of the second heating coil (22) is provided with a fourth fin (221), a fifth fin (222), and a sixth fin (223). The fourth fin (221) is vertically disposed at the bottom of the second heating coil (22), and the fifth fin (222) and the sixth fin (223) are mirror images disposed at the top of the second heating coil (22). The plane where the fourth fin (221) is located is perpendicular to the plane where the first fin (211) is located. The fifth fin (222) and the sixth fin (223) are both arc-shaped fins. The middle part of the fifth fin (222) and the sixth fin (223) protrudes in a direction that is close to each other.

5. An internal turbulence boiling dryer according to claim 1 or 4, characterized in that, The storage mechanism (3) includes a hopper (31), a gas guide plate (32), a guide member (33), and a dual-rotation shear type air distribution assembly. The top of the hopper (31) is in contact with the bottom of the drying cylinder (1). The gas guide plate (32) is detachably connected to the bottom of the hopper (31). The gas guide plate (32) is provided with a plurality of evenly distributed guide holes (320). The guide member (33) is fixedly connected to the top center of the gas guide plate (32). The dual-rotation shear type air distribution assembly is slidably connected to the guide member (33) up and down.

6. The internal turbulence boiling dryer according to claim 5, characterized in that, The dual-rotation shear type air distribution assembly includes, from the inside out, a sealed bearing (34), an inner ring blade (35), a first ring frame (36), a rotating ring (37), an outer ring blade (38), and a second ring frame (39). The sealed bearing (34) is slidably connected to the outer ring of the guide member (33). The two ends of the inner ring blade (35) are fixedly connected to the outer ring of the sealed bearing (34) and the inner ring of the first ring frame (36), respectively. The rotating ring (37) is rotatably connected to the outer ring of the first ring frame (36). The two ends of the outer ring blade (38) are fixedly connected to the outer ring of the rotating ring (37) and the inner ring of the second ring frame (39), respectively. The inner fan blade (35) and the outer fan blade (38) rotate in opposite directions. Both the inner fan blade (35) and the outer fan blade (38) are arranged in a circumferential array around the axis of the guide member (33).

7. The internal turbulence boiling dryer according to claim 5, characterized in that, The guide hole (320) includes a flared hole (321), a threaded hole (322), and a constricted hole (323) connected sequentially from bottom to top.

8. The internal turbulence boiling dryer according to claim 5, characterized in that, The hot gas conveying mechanism (4) includes a filter (41), a heater (42) and a lifting assembly connected in sequence. The lifting assembly includes a base (43) and a gas distribution plate (44). The base (43) is fixedly connected to the support (14) of the drying cylinder (1). The base (43) is provided with a gas chamber (431) that communicates with the storage chamber (301). The heater (42) is connected to the gas chamber (431) through a gas delivery pipe (45). The gas distribution plate (44) is fixedly connected to the inner wall of the base (43). The gas distribution plate (44) is provided with a plurality of uniformly distributed through holes (441).

9. The internal turbulence boiling dryer according to claim 8, characterized in that, The storage mechanism (3) also includes a material cart (8), and both sides of the material cart (8) are provided with U-shaped grooves (81). The rotating shafts (82) on both sides of the hopper (31) are movably connected to the U-shaped grooves (81) on both sides respectively. The lifting assembly also includes a lifting ring (46) and a cylinder (47). The lifting ring (46) is disposed above the gas distribution plate (44), and the lifting ring (46) is slidably connected to the inner wall of the base (43). The cylinder (47) is fixedly installed on the base (43), and the cylinder (47) is driven to move up and down with the lifting ring (46).

10. A method of using an internal turbulence boiling dryer, comprising using an internal turbulence boiling dryer as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Pre-cut the material (9) in the storage chamber (301); S2. The material (9) is dried in the fluidization chamber (11); S3. Take the dried material (9) out of the silo (31).

Images