Plastic particle dehumidifying and drying machine and using method thereof

Abstract

The invention discloses a plastic particle dehumidifying and drying machine and a using method thereof, and relates to the technical field of plastic particle drying. The plurality of bearing filter plates are fixedly connected to the inner side of the hollow cylinder at intervals from top to bottom, sieve pores are formed in the surfaces of the bearing filter plates, and the pore diameters of the sieve pores in the bearing filter plates are gradually reduced from top to bottom; and a drying mechanism is arranged in the bearing box body. According to the plastic particle drying device, the rotatable hollow cylinder is arranged in the heat preservation cylinder and matched with the bearing filter plates arranged in the hollow cylinder from top to bottom, plastic particles can be screened and layered, then the drying mechanism is used for providing vertically-upward hot air for the interior of the hollow cylinder, and layered drying of the plastic particles can be achieved; the drying machine can dry the maximum number of plastic particles each time, the cost is reduced, meanwhile, the complexity of re-screening is omitted, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic particle drying, and in particular to a plastic particle dehumidifying dryer and a use method thereof. Background Art

[0002] Plastic particles are one of the raw materials for processing plastic products. During the processing or recycling process, they need to be cleaned to remove surface stains. The cleaned plastic particles need to be dried with a drying rod to eliminate residual moisture.

[0003] In the prior art, the dryer used for drying plastic particles is mainly composed of a cavity for accommodating plastic particles, a heating component and a stirring component. The heating component provides heat to the cavity, and the stirring component cooperates to make the plastic particles evenly heated in the cavity, thereby achieving the purpose of drying.

[0004] However, the dryers currently used do not have the function of classified drying. Plastic particles of different diameters are dried together and then screened by screening according to usage requirements, or are screened in advance and then dried separately, which easily causes a small amount of plastic particles to need to be dried separately, increasing energy consumption, which not only increases the cost of the drying operation, but also increases the operating steps of the plastic particle drying, affecting the overall work efficiency. Therefore, a plastic particle dehumidification dryer and a method for using the same are proposed. Summary of the invention

[0005] The object of the present invention is to provide a plastic particle dehumidification dryer and a method of using the same to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a plastic granule dehumidification dryer, comprising:

[0007] A heat-insulating cylinder, wherein the heat-insulating cylinder is rotatably connected to a hollow cylinder;

[0008] A plurality of supporting filter plates, wherein the plurality of supporting filter plates are fixedly connected to the inner side of the hollow cylinder at intervals from top to bottom, and the surfaces of the plurality of supporting filter plates are provided with sieve holes, and the apertures of the sieve holes on the supporting filter plates are gradually reduced in order from top to bottom;

[0009] The interior of the hollow cylinder is connected with the interior of the carrying box, and a drying mechanism is arranged inside the carrying box, and the drying mechanism is used to transport hot air to the interior of the hollow cylinder.

[0010] Preferably, an outer tube body is provided in the middle of the inner side of the hollow cylinder, the outer wall of the outer tube body is rotatably connected to the middle of the supporting filter plate, and a material discharge mechanism is provided on the outer tube body for assisting in discharging plastic particles in the supporting filter plate.

[0011] Preferably, the unloading mechanism includes a discharge port opened at a corresponding position between the outer wall of the outer tube body and the inner bottom of the supporting filter plate, the inner tube body is rotatably connected to the inner tube body on the inner wall of the outer tube body, and arc through holes are opened at the same horizontal height position of the inner tube body wall corresponding to the discharge port, and the multiple arc through holes located on the outer wall of the inner tube body gradually increase in length from top to bottom.

[0012] Preferably, a material collecting groove is provided at the inner bottom of the supporting filter plate, the wall thickness of the material collecting groove gradually decreases in the direction close to the discharge port, and the material collecting groove is used to guide the plastic particles in the supporting filter plate to gather towards the discharge port.

[0013] Preferably, the inner cavity of the carrying box is provided with a driving assembly for driving the hollow cylinder to rotate, the driving assembly includes a transmission gear fixedly connected to the bottom of the outer wall of the hollow cylinder, the side wall of the transmission gear is meshedly connected with a driving gear, and a driving member for driving the driving gear to rotate is installed in the carrying box.

[0014] Preferably, the drying mechanism includes a fixed seat fixedly connected to the inner cavity of the carrying box body, the middle part of the fixed seat is fixedly connected to the bottom of the outer wall of the outer tube body, a heating chamber is opened inside the fixed seat, and air holes connected to the heating chamber are opened throughout the top of the fixed seat, and an induced draft fan is fixedly installed on the side wall of the carrying box body, and the induced draft fan is connected to the heating chamber through an air pipe.

[0015] Preferably, a first transmission wheel is fixedly connected to the bottom of the outer wall of the inner tube body, a second transmission wheel is rotatably connected to the inner cavity of the carrying box body, a transmission belt is connected between the second transmission wheel and the first transmission wheel, and a control mechanism is provided at the top of the carrying box body, and the control mechanism is used to control the rotation angle of the second transmission wheel.

[0016] Preferably, the control mechanism includes an adjusting disc, a connecting shaft is fixedly connected to the middle part of the bottom end of the adjusting disc, the bottom of the connecting shaft extends to the inner cavity of the bearing box body and is fixedly connected to the middle part of the second transmission wheel, a convex disc is provided on the side of the bottom end of the adjusting disc, a reset spring is fixedly connected between the convex disc and the adjusting disc, a plurality of positioning grooves are provided at intervals in a circular array at the top of the bearing box body and located on the side below the adjusting disc, one end of the convex disc close to the adjusting disc is slidably inserted into the positioning groove, a pull handle is slidably inserted into the top end of the adjusting disc, and the bottom end of the pull handle extends to the bottom of the adjusting disc and is fixedly connected to the middle of the convex disc.

[0017] Preferably, a top cover is fixedly connected to the top of the heat-insulating cylinder, and an exhaust pipe connected to the inner cavity of the heat-insulating cylinder is fixedly connected to the top of the top cover.

[0018] On the other hand, the present invention also provides a method for using a plastic particle dehumidification dryer, comprising the following steps:

[0019] Step 1: Pour the plastic particles to be dried into the hollow cylinder, and then cover the top of the insulation cylinder with a top cover. The driving component in the bearing box is pneumatically driven to drive the hollow cylinder to rotate reciprocatingly at intervals, so that the plastic particles can roll back and forth on the surface of the bearing filter plate. At the same time, the drying mechanism in the bearing box is pneumatically driven to blow hot air into the hollow cylinder in a vertical upward direction to perform hot air drying on the plastic particles on the bearing filter plate.

[0020] Step 2: The supporting filter plate rotates with the hollow cylinder to drive the plastic particles to roll on it. Since the sieve hole sizes of the multiple supporting filter plates from top to bottom are gradually reduced, the multiple supporting filter plates can be matched to achieve multi-level screening of the plastic particles, so that the plastic particles of the same specification are concentrated on the supporting filter plate at the same position, so that the plastic particles can be classified and dried in the hollow cylinder;

[0021] The third step is to unload the dried plastic particles, and the convex disc is pulled away from the first transmission wheel at the corresponding position by pulling the handle upward, and then the adjusting disc is rotated, and the rotation angle of the inner tube body is controlled by the cooperation of the second transmission wheel, the transmission belt and the first transmission wheel. Since the lengths of the plurality of arc through holes on the outer wall of the inner tube body from top to bottom are gradually shortened, after the inner tube body initially rotates an angle, the arc through holes at the bottom position of the inner tube body wall are connected with the discharge port at the bottom position of the outer tube body wall. At this time, the plastic particles on the supporting filter plate at the bottom position of the outer tube body can flow into the inner tube body through the corresponding arc through holes and the discharge port, and flow downward along the inner tube body to the collection container prepared in advance in the inner cavity of the supporting box. Similarly, after the inner tube body continues to rotate an angle, the plastic particles on the supporting filter plate at the middle position of the outer tube body wall are unloaded. In this way, the inner tube body can be rotated one angle in turn, and multiple groups of plastic particles in the hollow cylinder can be unloaded in turn to meet the needs of classified collection.

[0022] Technical effects and advantages of the present invention:

[0023] The present invention arranges a rotatable hollow cylinder in the heat-insulating cylinder, and cooperates with a plurality of supporting filter plates arranged from top to bottom in the hollow cylinder, so as to realize screening and stratification of plastic particles. Then, a drying mechanism is utilized to provide vertically upward hot air in the hollow cylinder, so as to achieve stratified drying of the plastic particles, so that the dryer can maintain the drying of a maximum amount of plastic particles each time, thereby reducing costs and eliminating the tediousness of re-screening, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a front cross-sectional structural schematic diagram of the heat preservation cylinder of the present invention.

[0026] Figure 3It is a schematic diagram of the three-dimensional cross-sectional structure of the carrying box of the present invention.

[0027] Figure 4 It is a schematic diagram of the upward sectional structure of the bearing box of the present invention.

[0028] Figure 5 It is a schematic diagram of a top-down stereoscopic cross-sectional structure of the regulating disc of the present invention.

[0029] Figure 6 It is a schematic diagram of the three-dimensional cross-sectional structure of the outer tube body of the present invention.

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the inner tube body of the present invention.

[0031] In the figure: 100, bearing box; 101, fixing seat; 102, heating chamber; 103, air vent; 104, induced draft fan; 200, insulation cylinder; 201, hollow cylinder; 202, outer tube body; 203, bearing filter plate; 204, material collection slot; 205, inner tube body; 206, material discharge port; 207, arc through hole; 208, first transmission wheel; 209, second transmission wheel; 210, transmission belt; 211, connecting shaft; 212, adjusting disc; 213, convex disc; 214, reset spring; 215, pull handle; 216, top cover; 217, exhaust pipe; 218, positioning groove; 219, transmission gear; 220, driving gear. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides Figure 1-Figure 7The plastic granule dehumidification dryer shown in the figure comprises a heat preservation cylinder 200, a plurality of supporting filter plates 203 and a supporting box 100, wherein the heat preservation cylinder 200 is rotatably connected with a hollow cylinder 201, the interior of the hollow cylinder 201 is connected with the interior of the supporting box 100, a plurality of supporting filter plates 203 are fixedly connected to the inner side of the hollow cylinder 201 at intervals from top to bottom, a plurality of supporting filter plates 203 are provided with sieve holes all over the surfaces, and the sieve holes on the supporting filter plates 203 are gradually reduced in size from top to bottom, a drying mechanism is provided inside the supporting box 100, and the drying mechanism is used to transport hot air into the hollow cylinder 201, and the hot air poured into the hollow cylinder 201 is made hot by arranging the supporting filter plates 203 with gradually reduced sieve holes from top to bottom in the hollow cylinder 201. The plastic particles in 201 can be screened, so that the plastic particles can be placed in layers in the hollow cylinder 201, and then the hot air is blown vertically upward into the hollow cylinder 201 through the drying mechanism to achieve the drying operation of the plastic particles. In addition, since the hollow cylinder 201 can rotate inside the heat-insulating cylinder 200, with the power provided by the rotating drive source, the hollow cylinder 201 applies centrifugal force to the plastic particles through the supporting filter plate 203 while drying, which not only allows the plastic particles to be fully screened on the supporting filter plate 203, but also allows the plastic particles to roll during the drying process, so that the hot air contact is more sufficient and the heating is more uniform, thereby improving the effect and efficiency of drying the plastic particles.

[0034] Furthermore, an outer tube body 202 is provided in the middle of the inner side of the hollow cylinder 201, and the outer wall of the outer tube body 202 is rotatably connected to the middle of the supporting filter plate 203, and a material discharge mechanism is provided on the outer tube body 202, and the material discharge mechanism is used to assist in discharging the plastic particles in the supporting filter plate 203; wherein the material discharge mechanism includes a material discharge port 206 opened at the outer wall of the outer tube body 202 and the inner bottom of the supporting filter plate 203 corresponding to the position, the inner wall of the outer tube body 202 is rotatably connected to the inner tube body 205, and the outer wall of the inner tube body 205 is provided with arc through holes 207 at the same horizontal height position corresponding to the material discharge port 206, and the inner The length of the multiple arc through holes 207 on the outer wall of the tube body 205 increases step by step from top to bottom. The supporting filter plate 203 and the outer tube body 202 can be rotatably connected by a bearing, so that the outer tube body 202 can be guaranteed not to rotate with the supporting filter plate 203. After the plastic particles are dried, only the inner tube body 205 needs to be rotated. Since the length of the multiple arc through holes 207 on the outer wall of the inner tube body 205 increases step by step from top to bottom, when the inner tube body 205 rotates step by step at a preset angle, the arc through holes 207 on the outer wall of the inner tube body 205 are connected with the supporting filter plate 203 in sequence from bottom to top. The outer wall of the outer tube 202 is connected with the discharge port 206 from bottom to top, so that the plastic particles in the supporting filter plate 203 can be discharged downward from the inner cavity of the inner tube 205 in batches in a bottom-up order, so as to achieve the purpose of loading and unloading the plastic particles from the supporting filter plate 203, and the batch unloading can be carried out, so as to achieve the batch unloading of plastic particles of different sizes to meet the individual reception below, thereby eliminating the trouble of re-screening and classification, improving the functionality of the dryer, and also improving the convenience of plastic particle drying processing; the bottom of the outer wall of the inner tube 205 is fixedly connected There is a first transmission wheel 208, and the inner cavity of the carrying box 100 is rotatably connected with a second transmission wheel 209, and a transmission belt 210 is connected between the second transmission wheel 209 and the first transmission wheel 208. A control mechanism is provided at the top of the carrying box 100, and the control mechanism is used to control the rotation angle of the second transmission wheel 209. The control mechanism can achieve the purpose of driving the inner tube body 205 to rotate through the transmission cooperation of the first transmission wheel 208, the second transmission wheel 209 and the transmission belt 210, wherein the diameter of the second transmission wheel 209 is smaller than the diameter of the first transmission wheel 208;

[0035] In a preferred embodiment, the control mechanism includes an adjusting disc 212, a connecting shaft 211 is fixedly connected to the middle of the bottom end of the adjusting disc 212, the bottom of the connecting shaft 211 extends to the inner cavity of the bearing box 100 and is fixedly connected to the middle of the second transmission wheel 209, a convex disc 213 is provided on the side of the bottom end of the adjusting disc 212, a reset spring 214 is fixedly connected between the convex disc 213 and the adjusting disc 212, a plurality of positioning grooves 218 are arranged in a circular array at intervals at the top of the bearing box 100 and located on the side below the adjusting disc 212, one end of the convex disc 213 close to the adjusting disc 212 is slidably plugged into the positioning groove 218, a pull handle 215 is slidably plugged into the top of the adjusting disc 212, the bottom end of the pull handle 215 extends to the bottom of the adjusting disc 212 and is connected to the convex disc 21 3 is fixedly connected in the middle, and the pull handle 215 is manually lifted up to drive the convex disc 213 to move up and separate from the positioning groove 218 at the corresponding position, contacting the locking state between the adjustment disc 212 and the carrying box 100, and then the adjustment disc 212 is driven by the pull handle 215 to rotate a preset angle, so that the convex disc 213 moves to the next positioning groove 218 position, and the pulling force on the pull handle 215 is removed. The elastic thrust provided by the return spring 214 can be used to insert the convex disc 213 into the positioning groove 218 at the corresponding position, and the radial locking of the adjustment disc 212 is performed, so that the inner tube 205 is locked, so that the inner tube 205 can drive the opening and closing of the discharge ports 206 at different positions on the outer tube 202 to control the batch discharge of plastic particles;

[0036] In addition, a material collecting groove 204 is provided at the bottom inner side of the supporting filter plate 203, and the wall thickness of the material collecting groove 204 gradually decreases in the direction approaching the discharge port 206. The material collecting groove 204 is used to guide the plastic particles in the supporting filter plate 203 to gather at the discharge port 206. The area inside the supporting filter plate 203 for accommodating the plastic particles is in the shape of a truncated cone that is wide at the top and narrow at the bottom. With the setting of the material collecting groove 204, the plastic particles located in the material collecting groove 204 can be concentratedly guided to the discharge port 206 of the outer tube body 202, so that the plastic particles can automatically gather at the discharge port 206 on the supporting filter plate 203 for efficient discharge, thereby ensuring the complete discharge of the plastic particles.

[0037] Furthermore, the inner cavity of the carrying box 100 is provided with a driving component for driving the hollow cylinder 201 to rotate, and the driving component includes a transmission gear 219 fixedly connected to the bottom of the outer wall of the hollow cylinder 201, and the side wall of the transmission gear 219 is meshingly connected with a driving gear 220. A driving member for driving the driving gear 220 to rotate is installed in the carrying box 100. The driving member can adopt a stepping motor, a three-phase asynchronous motor or the like, which can cooperate with a controller to meet the requirements of forward and reverse drive. The driving member can achieve the drive of the hollow cylinder 201 to rotate intermittently forward and reverse through the transmission action of the driving gear 220 and the transmission gear 219, so that the plastic particles can intermittently generate centrifugal force on the carrying filter plate 203, so that the plastic particles diverge outward and then use the slope of the carrying filter plate 203 to reflux and gather and then disperse again, which not only helps to improve the screening effect of the plastic particles, but also ensures that the plastic particles are heated evenly and comprehensively, thereby improving the drying effect of the plastic particles.

[0038] The drying mechanism includes a fixed seat 101 fixedly connected to the inner cavity of the carrying box 100, the middle part of the fixed seat 101 is fixedly connected to the bottom of the outer wall of the outer tube body 202, a heating chamber 102 is opened inside the fixed seat 101, and air holes 103 connected to the heating chamber 102 are opened all over the top of the fixed seat 101, and an induced draft fan 104 is fixedly installed on the side wall of the carrying box 100, and the induced draft fan 104 is connected to the heating chamber 102 through an air pipe. An electric heating pipe or a heating resistance wire is arranged in the heating chamber 102, so that the induced draft fan 104 can introduce external air into the heating chamber 102 to be heated, and then vertically from the air holes 103 to the heating chamber 102. The hot air is discharged upward and blown into the hollow cylinder 201, so that the plastic particles on the supporting filter plate 203 can be dried by the hot air. In addition, the setting of the fixed seat 101 can also play a bearing role for the outer tube body 202 to ensure the stability of the placement of the outer tube body 202. The top of the insulation cylinder 200 is fixedly connected with a top cover 216, and the top of the top cover 216 is fixedly connected with an exhaust pipe 217 connected to the inner cavity of the insulation cylinder 200. The top cover 216 cooperates with the exhaust pipe 217 to meet the discharge of hot air. In order to meet the energy-saving and environmental protection requirements, the exhaust pipe 217 can be connected to an external air supply pipe to transmit the hot air to the heat exchange equipment for heat recovery and utilization.

[0039] A method for using a plastic particle dehumidification dryer comprises the following steps:

[0040] Step 1: Pour the plastic particles to be dried into the hollow cylinder 201, and then cover the top cover 216 on the top of the heat preservation cylinder 200. The driving component in the carrying box 100 is pneumatically driven to drive the hollow cylinder 201 to rotate reciprocatingly at intervals, so that the plastic particles can roll back and forth on the surface of the carrying filter plate 203. At the same time, the drying mechanism in the carrying box 100 is pneumatically driven to blow hot air into the hollow cylinder 201 in a vertically upward direction to perform hot air drying operation on the plastic particles on the carrying filter plate 203.

[0041] Step 2: The supporting filter plate 203 rotates with the hollow cylinder 201 to drive the plastic particles to roll on it. Since the sieve hole sizes of the multiple supporting filter plates 203 from top to bottom are gradually reduced, the multiple supporting filter plates 203 can cooperate to achieve multi-level screening of the plastic particles, so that the plastic particles of the same specification are concentrated on the supporting filter plates 203 at the same position, so that the plastic particles can be classified and dried in the hollow cylinder 201;

[0042] Step three, when the dried plastic particles are unloaded, the convex disc 213 is pulled away from the first transmission wheel 208 at the corresponding position by pulling up the pull handle 215, and then the adjusting disc 212 is rotated to control the rotation angle of the inner tube body 205 through the cooperation of the second transmission wheel 209, the transmission belt 210 and the first transmission wheel 208. Since the length of the plurality of arc through holes 207 from top to bottom on the outer wall of the inner tube body 205 is gradually shortened, after the inner tube body 205 initially rotates an angle, the arc through hole 207 at the bottom position of the outer wall of the inner tube body 205 is connected with the discharge port 206 at the bottom of the outer wall of the outer tube body 202. At this time, the plastic particles on the supporting filter plate 203 located at the bottom of the outer tube body 202 can flow into the inner tube body 205 through the corresponding arc through holes 207 and the discharge port 206, and flow downward along the inner tube body 205 to the collection container prepared in advance in the inner cavity of the supporting box body 100. Similarly, after continuing to rotate the inner tube body 205 by an angle, the plastic particles on the supporting filter plate 203 located in the middle of the outer wall of the outer tube body 202 are discharged. By rotating the inner tube body 205 by an angle in turn, multiple groups of plastic particles located in the hollow cylinder 201 can be discharged in turn to meet the needs of classified collection.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic granule dehumidification dryer, characterized in that: include: A heat-insulating cylinder (200), wherein the heat-insulating cylinder (200) is rotatably connected to a hollow cylinder (201); A plurality of supporting filter plates (203), wherein the plurality of supporting filter plates (203) are fixedly connected to the inner side of the hollow cylinder (201) at intervals from top to bottom, and sieve holes are arranged all over the surfaces of the plurality of supporting filter plates (203), and the apertures of the sieve holes on the supporting filter plates (203) are gradually reduced in order from top to bottom; The carrying box (100) is connected to the interior of the hollow cylinder (201). A drying mechanism is provided inside the carrying box (100) and is used to transport hot air to the interior of the hollow cylinder (201).

2. A plastic granule dehumidification dryer according to claim 1, characterized in that: An outer tube body (202) is provided in the middle of the inner side of the hollow cylinder (201); the outer wall of the outer tube body (202) is rotatably connected to the middle of the supporting filter plate (203); a material discharge mechanism is provided on the outer tube body (202); the material discharge mechanism is used to assist in discharging plastic particles in the supporting filter plate (203).

3. A plastic granule dehumidification dryer according to claim 2, characterized in that: The unloading mechanism comprises a discharge port (206) provided at corresponding positions of the outer wall of the outer tube body (202) and the inner bottom of the supporting filter plate (203); the inner wall of the outer tube body (202) is rotatably connected to the inner tube body (205); arc through holes (207) are provided on the outer wall of the inner tube body (205) at the same horizontal height position corresponding to the discharge port (206); and the multiple arc through holes (207) located on the outer wall of the inner tube body (205) gradually increase in length from top to bottom.

4. A plastic granule dehumidification dryer according to claim 3, characterized in that: A material collecting groove (204) is provided at the inner bottom of the supporting filter plate (203), and the wall thickness of the material collecting groove (204) gradually decreases in the direction approaching the discharge port (206). The material collecting groove (204) is used to guide the plastic particles in the supporting filter plate (203) to gather towards the discharge port (206).

5. A plastic granule dehumidification dryer according to claim 4, characterized in that: The inner cavity of the bearing box (100) is provided with a driving assembly for driving the hollow cylinder (201) to rotate, the driving assembly comprising a transmission gear (219) fixedly connected to the bottom of the outer wall of the hollow cylinder (201), the side wall of the transmission gear (219) being meshingly connected with a driving gear (220), and a driving member for driving the driving gear (220) to rotate is installed in the bearing box (100).

6. A plastic granule dehumidification dryer according to claim 5, characterized in that: The drying mechanism comprises a fixing seat (101) fixedly connected to the inner cavity of the carrying box (100); the middle portion of the fixing seat (101) is fixedly connected to the bottom of the outer wall of the outer tube (202); a heating chamber (102) is provided inside the fixing seat (101); air holes (103) connected to the heating chamber (102) are provided throughout the top of the fixing seat (101); an induced draft fan (104) is fixedly installed on the side wall of the carrying box (100); and the induced draft fan (104) is connected to the heating chamber (102) through an air pipe.

7. A plastic granule dehumidification dryer according to claim 6, characterized in that: A first transmission wheel (208) is fixedly connected to the bottom of the outer wall of the inner tube body (205); a second transmission wheel (209) is rotatably connected to the inner cavity of the carrying box body (100); a transmission belt (210) is connected between the second transmission wheel (209) and the first transmission wheel (208); and a control mechanism is provided at the top of the carrying box body (100), and the control mechanism is used to control the rotation angle of the second transmission wheel (209).

8. A plastic granule dehumidification dryer according to claim 7, characterized in that: The control mechanism comprises an adjusting disc (212), a connecting shaft (211) is fixedly connected to the middle of the bottom end of the adjusting disc (212), the bottom of the connecting shaft (211) extends to the inner cavity of the bearing box (100) and is fixedly connected to the middle of the second transmission wheel (209), a convex disc (213) is provided on the side of the bottom end of the adjusting disc (212), a return spring (214) is fixedly connected between the convex disc (213) and the adjusting disc (212), and the A plurality of positioning grooves (218) are provided at intervals in a circular array at the top of the supporting box (100) and at the side position below the adjusting disc (212); one end of the convex disc (213) close to the adjusting disc (212) is slidably plugged into the positioning groove (218); a pull handle (215) is slidably plugged into the top of the adjusting disc (212); the bottom end of the pull handle (215) extends to the bottom of the adjusting disc (212) and is fixedly connected to the middle of the convex disc (213).

9. A plastic granule dehumidification dryer according to claim 8, characterized in that: The top end of the heat-insulating cylinder (200) is fixedly connected to a top cover (216), and the top end of the top cover (216) is fixedly connected to an exhaust pipe (217) that is in communication with the inner cavity of the heat-insulating cylinder (200).

10. The method for using the plastic granule dehumidification dryer according to claim 9, characterized in that: The following steps are involved: Step 1: Pour the plastic particles to be dried into the hollow cylinder (201), and then cover the top of the heat preservation cylinder (200) with a top cover (216). The driving component in the carrying box (100) is pneumatically driven to drive the hollow cylinder (201) to rotate reciprocatingly at intervals, so that the plastic particles can roll back and forth on the surface of the carrying filter plate (203). At the same time, the drying mechanism in the carrying box (100) is pneumatically driven to blow hot air into the hollow cylinder (201) in a vertically upward direction, and the plastic particles on the carrying filter plate (203) are dried with hot air; Step 2: The supporting filter plate (203) rotates with the hollow cylinder (201) to drive the plastic particles to roll thereon. Since the sizes of the sieve holes on the surfaces of the multiple supporting filter plates (203) decrease step by step from top to bottom, the multiple supporting filter plates (203) cooperate to achieve multi-stage screening of the plastic particles, so that the plastic particles of the same specification are concentrated on the supporting filter plates (203) at the same position, so that the plastic particles can be classified and dried in the hollow cylinder (201); Step 3: When the dried plastic particles are unloaded, the convex disc (213) is driven to be pulled away from the first transmission wheel (208) at the corresponding position by pulling up the pull handle (215), and then the adjustment disc (212) is rotated to control the rotation angle of the inner tube body (205) through the cooperation of the second transmission wheel (209), the transmission belt (210) and the first transmission wheel (208). Since the lengths of the plurality of arc through holes (207) on the outer wall of the inner tube body (205) from top to bottom are gradually shortened, after the inner tube body (205) initially rotates an angle, the arc through holes (207) at the bottom of the outer wall of the inner tube body (205) are aligned with the discharge port (206) at the bottom of the outer wall of the outer tube body (202). The plastic particles on the supporting filter plate (203) at the bottom of the outer tube body (202) can flow into the inner tube body (205) through the corresponding arc through holes (207) and the discharge port (206), and flow downward along the inner tube body (205) to the collection container prepared in advance in the inner cavity of the supporting box body (100). Similarly, after the inner tube body (205) is rotated by an angle, the plastic particles on the supporting filter plate (203) at the middle position of the outer wall of the outer tube body (202) are discharged. In this way, by rotating the inner tube body (205) by an angle in turn, multiple groups of plastic particles located in the hollow cylinder (201) can be discharged in turn to meet the needs of classified collection.

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