A cyclone dryer for corn starch kernels

Abstract

The present application relates to the technical field of drying equipment, and particularly relates to a corn starch grain cyclone dryer, which comprises a horizontally arranged spiral channel, one end of the spiral channel is provided with an air inlet pipe for supplying high-temperature airflow into the spiral channel and a feeding pipe for supplying starch grain material into the spiral channel; the high-temperature airflow and the material are made to enter from one end of the spiral channel and to be discharged from the other end of the spiral channel by taking the horizontally arranged spiral channel as a drying main body, so that continuous drying processing of the material can be realized, the material is spirally and unidirectionally moved under the driving of the high-temperature airflow, and drying is completed in the moving process; meanwhile, based on the horizontal arrangement of the spiral channel, the airflow flow direction and the gravity direction have the same or opposite relationship in different areas, the motion track of the material particles is differentiated, the material is reciprocally moved in the radial direction of the spiral channel, and the material is prevented from being concentrated in a single area for a long time.

Description

Technical Field

[0001] This invention relates to the technical field of drying equipment, and in particular to a cyclone dryer for corn starch granules. Background Technology

[0002] Corn starch granules are an important basic raw material in the food, pharmaceutical, and chemical industries. The drying process has a decisive impact on the flowability, solubility, and storage stability of the final product. Most existing starch drying equipment adopts fluidized bed drying technology. Its working principle is to put wet material into a closed container, and pressurize the material layer with high-temperature airflow through the gas distribution plate at the bottom. The airflow blows the material up and disperses it in all directions. The material then moves down along the inner wall of the container to the air outlet. Then the airflow blows the material up again, and so on, so that the material is in a fluidized state. Although this technology can effectively avoid starch gelatinization caused by local overheating, its operation mode has significant limitations: when the equipment is running, a certain amount of material must be put into the drying chamber in advance. After the drying cycle is completed, all the product is discharged, and then the material is fed again for the next batch. This intermittent operation process results in insufficient effective utilization of the equipment's working hours and makes it difficult to form a seamless connection with the upstream continuous centrifugal dehydration process and the downstream automated packaging line. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a cyclone dryer for corn starch granules, the specific technical solution of which is as follows: The present invention discloses a corn starch granule cyclone dryer, comprising a horizontally arranged spiral channel. One end of the spiral channel is provided with an air inlet pipe for supplying high-temperature airflow into the spiral channel and a feed pipe for supplying starch granule material into the spiral channel. The other end of the spiral channel is provided with a discharge port for discharging airflow and starch granule material. At least two sealing plates are provided on the feed pipe, and at least one of the sealing plates blocks the feed pipe. The sealing plates are moved on the feed pipe by a cylinder to open and close.

[0004] Furthermore, the spiral channel includes a number of arc segments and a number of transition segments arranged in a straight line. The arc segments are coaxially arranged with the spiral channel, and the transition segments are inclined along the axial direction of the spiral channel. The transition segments are located on the upper side of the circle where the arc segments are located, and the two ends of the transition segments are respectively connected to the corresponding ends of the two adjacent arc segments. Several push plates are provided within the arc-shaped section for pushing materials into the transition section.

[0005] Furthermore, the dryer also includes a rotating drum coaxially arranged with the spiral channel, and several arc-shaped segments and several transition segments are arranged on the rotating drum. The outer wall portion of the rotating drum that overlaps with the arc-shaped segments and the transition segments serves as the inner wall of the arc-shaped segments and the transition segments. The push plate passes through the rotating drum and slides along the radial direction of the rotating drum, and the push plate rotates synchronously with the rotating drum.

[0006] Furthermore, an auxiliary structure for driving the push plate to move on the rotating cylinder is provided inside the rotating cylinder. The auxiliary structure includes a core column passing through the rotating cylinder. The rotating cylinder is rotatably mounted on the core column. Several fixed disks are provided on the core column. The fixed disks are provided with an auxiliary groove composed of an arc groove one, an arc groove two, and two inclined grooves. The auxiliary groove is arranged in a ring. The radius of the arc groove two is larger than the radius of the arc groove one. A sliding column connected to the push plate is slidably mounted in the auxiliary groove.

[0007] Furthermore, the push plate is densely covered with a number of air holes that penetrate the push plate, and the air holes are curved in shape.

[0008] Furthermore, the dryer also includes a power unit for driving the rotation of the drum. The power unit includes a motor, a drive wheel, and a driven wheel. The motor drives the drive wheel to rotate. The driven wheel is coaxially connected to the drum. The outer walls of the drive wheel and the driven wheel are provided with meshing teeth.

[0009] Furthermore, a gap is provided between two adjacent teeth on the driving wheel and between two adjacent teeth on the driven wheel, allowing the driving wheel and the driven wheel to move relative to each other through the gap; The dryer also includes a locking tooth that engages with the teeth on the driven wheel and an elastic body that provides elastic thrust to the locking tooth. The locking tooth engages with the driving wheel to drive the driven wheel to rotate while vibrating along the circumference of the driven wheel.

[0010] Furthermore, the distance between the two ends of the air hole is greater than the wall thickness of the rotating cylinder; A gas supply pipe is provided on the rotating drum for supplying high-temperature gas into the drum.

[0011] The beneficial effects of this invention are as follows: By using a horizontally arranged spiral channel as the drying body, high-temperature airflow and materials enter from one end of the spiral channel and exit from the other end, thus enabling continuous drying of materials. The materials move in a spiral and unidirectional manner under the drive of the high-temperature airflow, and the drying is completed during the movement, which greatly improves the effective utilization rate of the equipment. At the same time, based on the horizontal arrangement of the spiral channel, the airflow direction and the direction of gravity have the same or opposite relationship in different areas, resulting in different movement trajectories of material particles. This causes the materials to reciprocate in the radial direction of the spiral channel, avoiding long-term concentration of materials in a single area, and significantly improving the fluidization drying effect and heat and mass transfer efficiency of the airflow. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a corn starch granule cyclone dryer. Figure 2 for Figure 1 A schematic diagram of the internal structure of the transfer cylinder; Figure 3 for Figure 2 A schematic diagram of the central fixed plate and its upper structure; Figure 4 for Figure 3 Schematic diagram of the middle push plate; Figure 5 for Figure 1 Schematic diagram of the structure of the power unit; Figure label: 1. Spiral channel; 2. Air inlet pipe; 3. Feed pipe; 4. Sealing plate; 5. Cylinder; 6. Discharge port; 7. Arc-shaped section; 8. Transition section; 9. Push plate; 10. Rotary drum; 11. Core column; 12. Fixed plate; 13. Arc groove one; 14. Arc groove two; 15. Inclined groove; 16. Sliding column; 17. Air hole; 18. Motor; 19. Drive wheel; 20. Driven wheel; 21. Gear; 22. Elastomer; 23. Air supply pipe; 24. Power unit. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0015] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 invention 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 limiting this invention.

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0017] like Figures 1 to 5 As shown, a corn starch granule cyclone dryer of the present invention includes a horizontally arranged spiral channel 1. One end of the spiral channel 1 is provided with an air inlet pipe 2 for supplying high-temperature airflow into the spiral channel 1 and a feed pipe 3 for supplying starch granule material into the spiral channel 1. The other end of the spiral channel 1 is provided with a discharge port 6 for discharging airflow and starch granule material. At least two sealing plates 4 are provided on the feed pipe 3, and at least one sealing plate 4 blocks the feed pipe 3. The sealing plate 4 is pushed on the feed pipe 3 by a cylinder 5 to move and open and close.

[0018] In this invention, the air inlet pipe 2 and the feed pipe 3 are located at one end of the spiral channel 1 and serve as input ends to introduce high-temperature airflow and material into the spiral channel 1. The airflow blows the material along the trajectory of the spiral channel 1 in a spiral flow. Since the spiral channel 1 is horizontally set, the airflow direction is opposite on both sides of the axis of the spiral channel 1, while the direction of gravity on the material is the same. The movement trajectory of the material in these two areas is different. That is, on the side where the airflow and the material gravity are in the same direction, the material falls faster and is closer to the inner wall of the spiral channel 1 and away from the axis of the spiral channel 1. On the side where the airflow and the material gravity are opposite, the material rises slower and is closer to the inner wall of the spiral channel 1 and closer to the axis of the spiral channel 1. Thus, the material generates a reciprocating motion state on the radial section of the spiral channel 1, avoiding the material being concentrated on the inner wall of the spiral channel 1 or away from the axis of the spiral channel 1, which would result in poor material-airflow interaction. This effectively improves the fluidization and drying effect of the airflow on the material and increases the contact rate.

[0019] To prevent high-temperature airflow from flowing out through feed pipe 3, the feeding method of feed pipe 3 needs to be specially set, such as... Figure 1 As shown, taking two sealing plates 4 as an example, when the upper sealing plate 4 blocks the feed pipe 3, the material can fall onto the upper sealing plate 4. When the upper sealing plate 4 is pushed by the corresponding cylinder 5 to slide and open on the feed pipe 3, the lower sealing plate 4 closes, and the material falls onto the lower sealing plate 4. When the upper sealing plate 4 closes again, the lower sealing plate 4 opens, and the material between the two sealing plates 4 can fall naturally into the spiral channel 1, thereby realizing a closed feeding mode and preventing the high-pressure gas in the spiral channel 1 from leaking out through the feed pipe 3. The dried starch granules and airflow can be discharged through the discharge port 6, thereby realizing a continuous fluidized drying mode.

[0020] In some embodiments, in order to improve the multidirectional flow of materials in the spiral channel 1 and improve the fluidization effect of materials, a plurality of spiral guide grooves can be opened on the inner wall of the spiral channel 1, and the spiral direction of the guide grooves is along the trajectory of the spiral channel 1.

[0021] By using the horizontally arranged spiral channel 1 as the drying body, high-temperature airflow and material enter from one end of the spiral channel 1 and exit from the other end, continuous drying processing of materials can be achieved. The material moves in a spiral and unidirectional manner under the drive of the high-temperature airflow, and completes the drying process during the movement, which greatly improves the effective utilization rate of the equipment. At the same time, based on the horizontal arrangement of the spiral channel 1, the airflow direction and the gravity direction have the same or opposite relationship in different areas, resulting in different movement trajectories of material particles. This causes the material to reciprocate in the radial direction of the spiral channel 1, avoiding the material from being concentrated in a single area for a long time, and significantly improving the fluidization drying effect of the airflow on the material and the heat and mass transfer efficiency.

[0022] Furthermore, the spiral channel 1 includes several arc segments 7 arranged in a straight line and several transition segments 8. The arc segments 7 are coaxially arranged with the spiral channel 1, and the transition segments 8 are inclined along the axial direction of the spiral channel 1. The transition segments 8 are located on the upper side of the circle where the arc segments 7 are located, and the two ends of the transition segments 8 are respectively connected to the corresponding ends on the two adjacent arc segments 7. Several push plates 9 are provided in the arc section 7 to push materials into the transition section 8.

[0023] When the material flows counterclockwise in the spiral channel 1, the transition section 8 is located on the upper left side of the arc section 7. When the material flows clockwise in the spiral channel 1, the transition section 8 is located on the upper right side of the arc section 7, thus tilting the installation position of the transition section 8. Because the installation position of the transition section 8 is tilted, the two ends of the transition section 8 are distributed vertically. The two ends of the arc section 7 also have a height difference in the vertical direction. The top of the transition section 8 is connected to the upper end of one arc section 7, and the bottom of the transition section 8 is connected to the lower end of another arc section 7, thus tilting the installation direction of the transition section 8. This allows the material in one arc section 7 to naturally slide into another arc section 7 when passing through the transition section 8, while avoiding the deposition of material in the transition section 8.

[0024] When the material flows spirally in the spiral channel 1, it tends to accumulate on the lower side of the spiral channel 1 due to its own gravity. This prevents the airflow from providing effective propulsion for the material. As the material gradually accumulates, it can easily cause blockage in the spiral channel 1. The pusher plate 9 can provide auxiliary propulsion for the material on the lower side of the spiral channel 1, allowing the material to flow spirally in the spiral channel 1. Specifically, the pusher plate 9 is used in conjunction with the corresponding arc segment 7. The shape characteristics of the arc segment 7 allow the pusher plate 9 to only perform arc-shaped movements, without having to perform spiral movements along the trajectory of the spiral channel 1. That is, the intersection of the plane on which the movement trajectory of the pusher plate 9 lies with the axis of the spiral channel 1 is fixed.

[0025] In use, the pusher plate 9 moves within the arc-shaped section 7 and pushes the material on the lower side of the arc-shaped section 7 upward. When the material moves to the highest point of the arc-shaped section 7, it naturally slides down due to gravity and enters the adjacent arc-shaped section 7 through the transition section 8. When the pusher plate 9 moves to the position of the transition section 8, the pusher plate 9 avoids the transition section 8. The avoidance method here can be that the pusher plate 9 moves towards the axis of the spiral channel 1, or other methods can be used. When the pusher plate 9 moves back to the area where the arc-shaped section 7 is located, the pusher plate 9 re-enters the arc-shaped section 7 and provides auxiliary pushing force to the material in the arc-shaped section 7. Using the above structure, the continuous pushing of the material can be achieved based on the rotational motion of the pusher plate 9.

[0026] Furthermore, the dryer also includes a rotating drum 10 coaxially arranged with the spiral channel 1. Several arc-shaped sections 7 and several transition sections 8 are arranged on the rotating drum 10, and the outer wall portion of the rotating drum 10 that overlaps with the arc-shaped sections 7 and transition sections 8 serves as the inner wall of the arc-shaped sections 7 and transition sections 8. The push plate 9 passes through the rotating drum 10 and slides along the radial direction of the rotating drum 10, and the push plate 9 rotates synchronously with the rotating drum 10.

[0027] Both the arc-shaped segment 7 and the transition segment 8 can have an arc-shaped cross section, which, together with the outer wall of the rotating cylinder 10, can form a complete spiral channel 1. That is, the outer wall of the rotating cylinder 10 is used as part of the spiral channel 1. The spiral channel 1 is fixed in position, and the rotating cylinder 10 can rotate relative to the spiral channel 1. Thus, the rotating cylinder 10 provides rotational power for several push plates 9. When the push plate 9 moves in the area where the arc-shaped segment 7 is located, the push plate 9 slides on the rotating cylinder 10 and inserts into the arc-shaped segment 7. When the push plate 9 moves to the position of the transition segment 8, the push plate 9 slides into the rotating cylinder 10 and avoids the transition segment 8. When the push plate 9 moves back to the area where the arc-shaped segment 7 is located, the push plate 9 slides into the arc-shaped segment 7 again. Thus, the continuous rotational motion of the rotating cylinder 10 provides moving power for several push plates 9.

[0028] Furthermore, an auxiliary structure for driving the push plate 9 to move on the rotating cylinder 10 is provided inside the rotating cylinder 10. The auxiliary structure includes a core column 11 passing through the rotating cylinder 10. The rotating cylinder 10 is rotatably mounted on the core column 11. Several fixed disks 12 are provided on the core column 11. The fixed disks 12 are provided with an auxiliary groove composed of an arc groove 13, an arc groove 2 14 and two inclined grooves 15. The auxiliary groove is arranged in a ring. The radius of the arc groove 2 14 is larger than the radius of the arc groove 13. A sliding column 16 connected to the push plate 9 is slidably mounted in the auxiliary groove.

[0029] The core column 11 can be used to support the rotating drum 10 and several fixed disks 12. When the rotating drum 10 rotates, it will drive several push plates 9 to move synchronously. The push plates 9 can drive the sliding column 16 to move in the auxiliary groove. When the sliding column 16 moves in the first arc groove 13, the push plate 9 is close to the axis of the spiral channel 1. At this time, the push plate 9 avoids the transition section 8. When the sliding column 16 moves in the second arc groove 14, the push plate 9 is away from the axis of the spiral channel 1. At this time, the push plate 9 moves in the area where the arc section 7 is located. Thus, the fixed disks 12 and their auxiliary grooves can provide power for the movement of the push plate 9, and this power is mainly based on the rotational movement of the rotating drum 10. The inclined groove 15 can be used to transition the movement of the sliding column 16 between the first arc groove 13 and the second arc groove 14.

[0030] Furthermore, the push plate 9 is densely covered with a number of air holes 17 that penetrate the push plate 9, and the air holes 17 are curved in shape.

[0031] Since the pusher plate 9 needs to push the material within the arc-shaped section 7 to move and thus assist in pushing the material upward, the material will be displaced in the radial direction of the spiral channel 1 during this process. Therefore, if the pusher plate 9 simply provides a pushing effect, it will isolate and block the interior of the arc-shaped section 7, causing poor airflow. To avoid this phenomenon, the air holes 17 on the pusher plate 9 can be used to connect the interior spaces of the arc-shaped section 7 on both sides of the pusher plate 9, thereby ensuring that the airflow is normal within the arc-shaped section 7. At the same time, the shape of the air holes 17 can also prevent the material from flowing from one side of the pusher plate 9 to the other side, thereby achieving the effect of allowing airflow while blocking material flow.

[0032] In some embodiments, the diameter of the air hole 17 can be reduced so that only part of the airflow is allowed to pass through the air hole 17. In this way, the airflow will generate a thrust on one side of the push plate 9, causing the push plate 9 to move and thereby drive the rotating drum 10 to rotate. In this way, the airflow can be used to provide power for the rotating drum 10. The arrangement of multiple push plates 9 on each arc segment 7 can ensure that when one push plate 9 moves to the position of the transition segment 8, the other push plates 9 can still be moved by the airflow.

[0033] Furthermore, the dryer also includes a power unit 24 for driving the rotating drum 10 to move. The power unit 24 includes a motor 18, a drive wheel 19 and a driven wheel 20. The motor 18 drives the drive wheel 19 to rotate. The driven wheel 20 is coaxially connected to the rotating drum 10. The outer walls of both the drive wheel 19 and the driven wheel 20 are provided with meshing teeth.

[0034] The motor 18 can be mounted on an external frame. The motor 18 provides rotational power to the drum 10 through the drive wheel 19 and the driven wheel 20, thereby driving the equipment to operate.

[0035] Furthermore, a gap is provided between two adjacent teeth on the driving wheel 19 and between two adjacent teeth on the driven wheel 20, through which the driving wheel 19 and the driven wheel 20 can move relative to each other; The dryer also includes a locking tooth 21 that engages with the teeth on the driven wheel 20 and an elastic body 22 that provides elastic thrust to the locking tooth 21. The locking tooth 21 engages with the driving wheel 19 to drive the driven wheel 20 to rotate while vibrating along the circumference of the driven wheel 20.

[0036] Both the locking tooth 21 and the elastic body 22 are mounted on the external frame. The empty area between two adjacent teeth allows for a certain distance between them. When one tooth on the driving wheel 19 pushes the driven wheel 20 to rotate through one tooth on the driven wheel 20, the driven wheel 20 can push the locking tooth 21 to move away from the axis of the spiral channel 1 through its tooth. At this time, the elastic body 22 undergoes elastic deformation. When the locking tooth 21 moves from one side of the corresponding tooth on the driven wheel 20 to the other side, the elastic thrust provided by the elastic body 22 to the locking tooth 21 can assist in pushing the driven wheel 20 to rotate and move by an angle. At this time, the driven wheel 20, due to inertia... The driven wheel 20 will generate a small-angle relative motion with the driving wheel 19, that is, the teeth on the driving wheel 19 will move in the empty area between two adjacent teeth on the driven wheel 20. When the next tooth on the driving wheel 19 moves to the position where it meshes with the corresponding tooth on the driven wheel 20, the driving wheel 19 will push the driven wheel 20 to rotate again, thereby causing the driven wheel 20 to rotate continuously in one direction. And every time the driven wheel 20 rotates by a certain angle, it will generate a small range of vibration in its own circumferential direction, which can drive the push plate 9 to vibrate in a small range while rotating continuously, so as to facilitate the dispersal of the material on the push plate 9 and prevent the material from depositing on the push plate 9.

[0037] Furthermore, the distance between the two ends of the vent 17 is greater than the wall thickness of the rotating cylinder 10; A gas supply pipe 23 is provided on the rotating drum 10 for supplying high-temperature gas into the rotating drum 10.

[0038] Since the distance between the two ends of the air hole 17 is greater than the wall thickness of the rotating drum 10, when one end of the air hole 17 is located inside the rotating drum 10, the other end can be located inside the arc section 7. At this time, the high-temperature gas supplied by the air supply pipe 23 to the rotating drum 10 can keep the inside of the rotating drum 10 under high pressure. The high-temperature gas inside the rotating drum 10 can be introduced into the arc section 7 through the air hole 17, thereby making it convenient to blow the small amount of material stored in the air hole 17 into the arc section 7 and prevent this part of the material from entering the rotating drum 10.

[0039] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cyclone dryer for corn starch granules, characterized in that, The device includes a horizontally arranged spiral channel. One end of the spiral channel is provided with an air inlet pipe for supplying high-temperature airflow into the spiral channel and a feed pipe for supplying starch granules into the spiral channel. The other end of the spiral channel is provided with a discharge port for discharging the airflow and starch granules. At least two sealing plates are provided on the feed pipe, and at least one of the sealing plates blocks the feed pipe. The sealing plates are moved on the feed pipe by a cylinder to open and close.

2. The corn starch granule cyclone dryer according to claim 1, characterized in that, The spiral channel includes several arc segments and several transition segments arranged in a straight line. The arc segments are coaxially arranged with the spiral channel, and the transition segments are inclined along the axis of the spiral channel. The transition segments are located on the upper side of the circle where the arc segments are located, and the two ends of the transition segments are respectively connected to the corresponding ends of the two adjacent arc segments. Several push plates are provided within the arc-shaped section for pushing materials into the transition section.

3. A cyclone dryer for corn starch granules according to claim 2, characterized in that, The dryer also includes a rotating drum coaxially arranged with the spiral channel. Several arc-shaped segments and several transition segments are arranged on the rotating drum, and the outer wall portion of the rotating drum that overlaps with the arc-shaped segments and the transition segments serves as the inner wall of the arc-shaped segments and the transition segments. The push plate passes through the rotating drum and slides along the radial direction of the rotating drum, and the push plate rotates synchronously with the rotating drum.

4. A cyclone dryer for corn starch granules according to claim 3, characterized in that, An auxiliary structure for driving the push plate to move on the rotating cylinder is provided inside the rotating cylinder. The auxiliary structure includes a core column passing through the rotating cylinder. The rotating cylinder is rotatably mounted on the core column. Several fixed disks are provided on the core column. The fixed disks are provided with auxiliary grooves composed of an arc groove one, an arc groove two, and two inclined grooves. The auxiliary grooves are arranged in a ring. The radius of the arc groove two is larger than the radius of the arc groove one. A sliding column connected to the push plate is slidably mounted in the auxiliary groove.

5. A cyclone dryer for corn starch granules according to claim 3, characterized in that, The push plate is densely covered with a number of air holes that penetrate the push plate, and the air holes are curved in shape.

6. A cyclone dryer for corn starch granules according to claim 3, characterized in that, The dryer also includes a power unit for driving the rotating drum. The power unit includes a motor, a drive wheel, and a driven wheel. The motor drives the drive wheel to rotate. The driven wheel is coaxially connected to the rotating drum. The outer walls of the drive wheel and the driven wheel are provided with meshing teeth.

7. A cyclone dryer for corn starch granules according to claim 6, characterized in that, An empty area is provided between two adjacent teeth on the driving wheel and between two adjacent teeth on the driven wheel, and the driving wheel and the driven wheel can move relative to each other through the empty area; The dryer also includes a locking tooth that engages with the teeth on the driven wheel and an elastic body that provides elastic thrust to the locking tooth. The locking tooth engages with the driving wheel to drive the driven wheel to rotate while vibrating along the circumference of the driven wheel.

8. A cyclone dryer for corn starch granules according to claim 5, characterized in that, The distance between the two ends of the air hole is greater than the wall thickness of the rotating cylinder; A gas supply pipe is provided on the rotating drum for supplying high-temperature gas into the drum.

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