Efficient drying equipment for modified PP plastic particles and drying method of efficient drying equipment

Abstract

The invention discloses efficient drying equipment for modified PP plastic particles and a drying method thereof, and belongs to the technical field of plastic pretreatment, the efficient drying equipment comprises a drying hopper, the bottom of the drying hopper is connected with a guide part, the bottom of the guide part is provided with a discharge port, and an inner cavity of the drying hopper is rotationally connected with a plurality of storage assemblies. According to the device, different raw material particles can be added into a plurality of charging barrels according to modification requirements through a plurality of designed material storage assemblies, and when the raw material particles are stored in the charging barrels, the charging barrels in a normally closed state can prevent the raw material particles from being affected with damp due to air invasion, so that the storage duration of the particles in the drying hopper is prolonged; and when a certain charging barrel is in a to-be-dried state, a driving part is controlled to drive a driving rod to rotate so as to feed the charging barrel affected with damp into a heating guide assembly, independent drying treatment can be selectively carried out aiming at the immediate damp-proof measures or newly-added particles, and the plastic particle drying effect in the modification process is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic pretreatment, and in particular relates to a high-efficiency drying device and a drying method for modified PP plastic particles. Background Art

[0002] Plastic granules refer to granular plastics. In the production process of polypropylene plastic granules, in order to ensure the quality of the final product, the raw materials need to be dried. Since polypropylene granules have hygroscopic properties, if the surface and internal moisture are not effectively removed before the modification process, it is easy to produce defects such as bubbles and silver streaks during subsequent processing, and at the same time affect the melt flow rate. At present, the industry generally adopts a hopper drying system; A Chinese invention patent with authorization announcement number CN118082036B discloses a plastic particle drying device, which belongs to the field of plastic particle drying processing, including a drying box, a top of which is equipped with an introduction mechanism for introducing plastic particles, a top of which is located on one side of the introduction mechanism and is equipped with a hot air blower for drying plastic particles, a transmission mechanism for moving plastic particles is installed inside the drying box, a gas dehumidification filter unit aligned with one side of the transmission mechanism is installed on one side of the drying box, and a discharge mechanism for outputting dried plastic particles is installed at the bottom of the drying box; the above-mentioned equipment can realize the component processing of a large number of plastic particles and improve the overall heating effect of the plastic particles, but in actual use, plastic particles with different production cycles and modified ratios require different drying temperatures, and additional external different process sections are required for drying treatment, and there is room for improvement. Summary of the invention

[0003] The purpose of the present invention is to propose an efficient drying device and a drying method for modified PP plastic particles in order to solve the problem that plastic particles with different production cycles and modified ratios require different drying temperatures and need additional external different process sections for drying treatment.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: An efficient drying device for modified PP plastic particles, comprising a drying hopper, a guide part connected to the bottom of the drying hopper, a discharge port at the bottom of the guide part, a plurality of material storage components rotatably connected to the inner cavity of the drying hopper, and a protruding cavity on one side of the drying hopper, and a heating guide component slidably connected to the protruding cavity; The heating and guiding assembly includes a guiding cover. A drying medium cavity is provided inside the guiding cover, and a plurality of air outlet nozzles are provided in the drying medium cavity. The air outlet nozzles are connected inside the guiding cover. By transferring the corresponding material storage assembly into the guiding cover for independent drying, one side of the heating and guiding assembly is communicated with a heating and blowing assembly. The heating and blowing assembly is installed outside the drying hopper, and a positioning assembly for driving the guiding cover to reciprocate is provided in the protruding cavity. The movement of the guiding cover is used to avoid interfering with the rotational switching of the material storage assembly.

[0005] As a further description of the above technical solution: The bottom of the drying hopper has a partition board, and a driving part is installed on the top of the partition board. Openings are provided at positions corresponding to the rotation stroke of the material storage assembly on the top of the partition board. After a single rotation, the material storage assembly communicates with at least one opening. The driving rod is rotatably connected to the top of the driving part, and the outer peripheral side of the driving rod is connected to the corresponding material storage assembly through a connecting plate.

[0006] As a further description of the above technical solution: The material storage assembly includes a material cylinder. The top of the material cylinder has a feed inlet, and the bottom of the material cylinder has a quantitative discharging assembly. A plurality of heat exchange grooves are circumferentially provided along the axis on the outer peripheral side of the material cylinder, and a receiving groove is provided at the bottom of the heat exchange groove. A shielding block is provided in the receiving groove, and the shielding block is configured to be slidably connected in the heat exchange groove. The ventilation volume of the material cylinder is controlled by closing the heat exchange groove with the shielding block.

[0007] As a further description of the above technical solution: The top of the shielding block is connected with a filling pad. The width and length of the filling pad are greater than the width and length of the shielding block. The closing effect is improved by closing the gap of the receiving groove with the filling pad.

[0008] As a further description of the above technical solution: Sliding holes are provided between the longitudinally arranged heat exchange grooves, and a guiding rod is slidably connected in the sliding holes. The two ends of the guiding rod are connected to the adjacent shielding blocks, and a support ring is connected between the guiding rods at the top. The support ring is located at the top of the material cylinder. Pressing parts are connected to both sides of the inner cavity of the guiding cover corresponding to the material cylinder. The front cross-sectional shape of the pressing part is conical, and the support ring moves downward through the conical contact on the front side of the pressing part.

[0009] As a further description of the above technical solution: A plurality of second springs are connected to the bottom of the support ring corresponding to the positions of the guiding rods. The two ends of the second springs are respectively connected to the support ring and the corresponding positions on one side of the material cylinder. The rear side of the guiding cover is connected with a telescopic rod. The other end of the telescopic rod is connected to one side inside the protruding cavity of the drying hopper. A first spring is sleeved outside the telescopic rod, and the two ends of the first spring are respectively connected to the guiding cover and one side inside the protruding cavity.

[0010] As a further description of the above technical solution: The rear side of the guiding cover is connected to the heating and blowing assembly through a pipeline. The front side of the guiding cover has an arc portion, and the air outlet nozzle is connected to the inner side of the arc portion. The positioning assembly includes a control board and a driven gear. The driven gear is rotatably connected to the top of the partition plate. Both sides of the driven gear are engaged with racks, and one of the racks is connected to one side of the control board, and the other rack is connected to the bottom of the guiding cover. The rack connected to the bottom of the guiding cover passes through a hole opened in the side wall of the drying hopper and extends outside the drying hopper. By pressing the control board, the other rack and the guiding cover are driven to move to the drying position.

[0011] As a further description of the above technical solution: The front end of the control board has an inclined surface, and one side of the inclined surface of the control board is in contact with a pressing wedge plate. The pressing wedge plate is connected to the outside of the driving rod through a connecting rod. By rotating the driving rod, the inclined surface of the pressing wedge plate presses the control board to move outward. One side of the control board is connected to a sliding rod. A sliding sleeve is sleeved outside the sliding rod. The sliding cylinder is connected to the top of the partition plate. A third spring is sleeved outside the sliding rod, and both ends of the third spring are respectively connected to corresponding positions of the sliding sleeve and one side of the control board.

[0012] As a further description of the above technical solution: A cover body is provided at the top of the drying hopper. The top of the cover body has a corresponding feeding pipeline. An exhaust pipeline is provided at the top of the cover body, and the exhaust pipeline is located at the top of the heating and guiding assembly at the corresponding position for heating and drying.

[0013] An efficient drying method for modified PP plastic particles specifically includes the following steps: Add different plastic particles into the corresponding storage components according to process requirements. When the storage components rotate in the drying hopper, the rotation of the storage components can adjust the position corresponding to the guiding cover. After the storage component to be dried rotates to one side of the guiding cover at the corresponding position, the guiding cover can spray out the gas sent by the external heating and blowing assembly after blowing and heating the air. The raw materials corresponding in the storage component can be dried through the sprayed gas.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, through a plurality of designed material storage components, different raw material particles can be added into a plurality of barrels according to the modification requirements. When the raw material particles are stored in the barrels, the barrels in a normally closed state can prevent air intrusion from causing the raw material particles to get damp, prolonging the storage time of the particles in the drying hopper. And when a certain barrel is in a state to be dried, by controlling the driving part to drive the driving rod to rotate, the damp barrel can be sent into the heating and guiding component, and independent drying treatment can be selectively carried out for the moisture-proof measures that are approaching the expiration date or newly added granular materials, improving the drying effect of the plastic particles during the modification process.

[0015] 2. In the present invention, through the designed support ring and pressing part, after the barrel to be dried moves to one side of the guiding cover, the guiding cover can be sleeved outside the barrel to be dried under the control of the positioning component. At this time, the front conical part of the pressing part can squeeze the support ring, and the support ring can drive the guiding rod to move downward under the extrusion, and the downward movement of the guiding rod can make the blocking block enter the accommodating groove to open the heat exchange groove gap. The air outlet nozzle in the guiding cover can spray heated air to heat the internal particles. Through the cooperated heat exchange groove that can be closed and the pressing trigger of the support ring, heat exchange drying is realized after triggering, and there is no hot air exchange between multiple barrels, preventing the damp water vapor from drying from invading other barrels and maintaining the independent storage stability of the particles in each barrel.

[0016] 3. In the present invention, when the driving part drives the driving rod and the barrel to rotate, the driving rod can synchronously drive the extrusion wedge plate to move through the outer peripheral connecting rod. The movement of the extrusion wedge plate can squeeze the control plate through the front inclined surface. When the control plate is squeezed, it can drive the driven gear to rotate through the rack, and the rotation of the driven gear can drive the other rack and the guiding cover to move inward. The guiding cover moving inward can be sleeved outside the barrel at the corresponding position. While the barrel rotates into the corresponding position, the positioning of the guiding cover is triggered to output drying air, which is beneficial to avoiding interference with the rotation of the barrel through the retractable guiding cover. Through the guiding cover sleeved outside the barrel, a plurality of air outlet nozzles arranged oppositely on the circumference can improve the convective heating effect on the materials in the barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of an efficient drying device for modified PP plastic particles proposed by the present invention; Figure 2 is the top view structural schematic diagram of an efficient drying device for modified PP plastic particles proposed by the present invention; Figure 3 is the side view structural schematic diagram of the drying hopper of an efficient drying device for modified PP plastic particles proposed by the present invention; Figure 4 is the structural schematic diagram of the material storage component of an efficient drying device for modified PP plastic particles proposed by the present invention; Figure 5 Proposed by the present invention Figure 4 Schematic diagram of the enlarged structure of part A in Figure 6 Schematic diagram of the assembly structure of the storage component of an efficient drying device for modified PP plastic particles proposed by the present invention Figure 7 Proposed by the present invention Figure 6 Schematic diagram of the enlarged structure of part B in Figure 8 Schematic diagram of the positioning component structure of an efficient drying device for modified PP plastic particles proposed by the present invention Figure 9 Schematic diagram of the disassembly structure of the storage component of an efficient drying device for modified PP plastic particles proposed by the present invention Figure 10 Schematic diagram of a partial side structure of an efficient drying device for modified PP plastic particles proposed by the present invention Figure 11 Schematic diagram of the disassembly structure of an efficient drying device for modified PP plastic particles proposed by the present invention

[0018] Legend: 1. Drying hopper; 2. Guide part; 3. Heating and blowing component; 4. Heating and guiding component; 401. Guide cover; 402. Air outlet nozzle; 403. Pressing part; 404. Telescopic rod; 405. First spring; 5. Storage component; 501. Barrel; 502. Blocking block; 503. Guide rod; 504. Second spring; 505. Support ring; 506. Filling pad; 507. Accommodation groove; 6. Positioning component; 601. Control board; 602. Driven gear; 603. Rack; 604. Extrusion wedge plate; 605. Connecting rod; 606. Slide bar; 607. Third spring; 608. Slide sleeve; 7. Driving part; 8. Driving rod; 9. Exhaust pipe. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] Please refer to Figures 1 - 11, the present invention provides a technical solution: an efficient drying device for modified PP plastic particles, including a drying hopper 1. The bottom of the drying hopper 1 is connected to a guiding part 2, and the bottom of the guiding part 2 has a discharge port. A plurality of material storage components 5 are rotatably connected in the inner cavity of the drying hopper 1, and there is a protruding cavity on one side of the drying hopper 1. A heating and guiding component 4 is slidably connected in the protruding cavity. The heating and guiding component 4 includes a guiding cover 401. There is a drying medium cavity in the guiding cover 401, and a plurality of air outlet nozzles 402 are provided in the drying medium cavity. The air outlet nozzles 402 are connected in the guiding cover 401, and the corresponding material storage component 5 is transferred into the guiding cover 401 for independent drying; A positioning component 6 for driving the guiding cover 401 to reciprocate is provided in the protruding cavity, and the movement of the guiding cover 401 is used to avoid interfering with the rotational switching of the material storage component 5; One side of the heating and guiding component 4 is communicated with a heating and blowing component 3, and the heating and blowing component 3 is installed outside the drying hopper 1.

[0021] Among them, the heating and blowing component 3 includes a blower and corresponding electric heating sources, such as thermocouples, etc. When the heating and blowing component 3 sucks air and enters the pipeline, the thermocouple heats the air and then transports it to the inner heating and guiding component 4 to heat the corresponding material storage component 5. Heating air is blown into the heating and guiding component 4 through the blowing component.

[0022] Please refer to Figures 4 - 5 and Figure 9 , the bottom of the drying hopper 1 has a partition, and a driving part 7 is installed on the top of the partition. Openings are provided at the positions corresponding to the rotation stroke of the material storage component 5 on the top of the partition. After a single rotation of the material storage component 5, it is communicated with at least one opening. The top of the driving part 7 is rotatably connected to a driving rod 8, and the outer peripheral side of the driving rod 8 is connected to the corresponding material storage component 5 through a connecting plate; The material storage component 5 includes a material cylinder 501. The top of the material cylinder 501 has a feed port, and the bottom of the material cylinder 501 has a quantitative discharge component. A plurality of heat exchange grooves are circumferentially arranged along the axis on the outer peripheral side of the material cylinder 501, and a receiving groove 507 is provided at the bottom of the heat exchange groove. A shielding block 502 is provided in the receiving groove 507. The shielding block 502 is configured to be slidably connected in the heat exchange groove, and the ventilation volume of the material cylinder 501 is controlled by closing the heat exchange groove with the shielding block 502; The top of the shielding block 502 is connected to a filling pad 506. The width and length of the filling pad 506 are greater than the width and length of the shielding block 502. The gap of the receiving groove 507 is closed by the filling pad 506 to improve the closing effect; Among them, the material cylinder 501 is filled with plastic particles to be modified or modified plastic particles according to the process stage; Among them, the quantitative discharge component adopts a gate valve driven by electricity, and the discharge amount is controlled by adjusting the opening of the gate. This part belongs to the conventional technology in the field and will not be elaborated. Among them, the driving part 7 can be a motor and the corresponding transmission belt or gear set for transmission cooperation. This part is common knowledge in the field and will not be elaborated further.

[0023] Specifically: through a plurality of designed material storage components 5, different raw material particles can be added into a plurality of barrels 501 according to the modification requirements. When the raw material particles are stored in the barrels 501, the barrels 501 in a normally closed state can prevent air intrusion from causing the raw material particles to get damp, which can extend the storage time of the particles in the drying hopper 1. And when a certain barrel 501 is in a state to be dried, the driving part 7 can be controlled to drive the driving rod 8 to rotate, so as to send the damp barrel 501 into the heating and guiding component 4, and independent drying treatment can be selectively carried out for the moisture-proof measures that are approaching the expiration date or newly added granular materials, improving the drying effect of the plastic particles in the modification process. Moreover, no hot air exchange occurs between the plurality of barrels 501, preventing the damp water vapor from drying from invading other barrels 501 and maintaining the independent storage stability of the particles in each barrel 501; Sliding holes are provided between a plurality of longitudinal heat exchange grooves, and a guide rod 503 is slidably connected in the sliding holes. Both ends of the guide rod 503 are connected to the adjacent shielding blocks 502, and a support ring 505 is connected between the guide rods 503 at the top. The support ring 505 is located at the top of the barrel 501. Pressing members 403 are connected to both sides of the inner cavity of the guiding cover 401 corresponding to the barrel 501. The front cross-sectional shape of the pressing member 403 is conical, and the support ring 505 moves downward through the contact of the front conical shape of the pressing member 403; A plurality of second springs 504 are connected to the position of the support ring 505 corresponding to the guide rod 503 at the bottom. Both ends of the second springs 504 are respectively connected to the corresponding positions of the support ring 505 and one side of the barrel 501; Furthermore, through the designed support ring 505 and pressing member 403, after the barrel 501 to be dried moves to one side of the guiding cover 401, the guiding cover 401 can be sleeved outside the barrel 501 to be dried under the control of the positioning component 6. At this time, the front conical part of the pressing member 403 can squeeze the support ring 505, and the support ring 505 can drive the guide rod 503 to move downward when being squeezed. The downward movement of the guide rod 503 can make the shielding block 502 enter the accommodating groove 507, thereby opening the gap of the heat exchange groove. At this time, the air outlet nozzle 402 in the guiding cover 401 can spray heated air to heat the internal particles, and realize heat exchange drying after triggering through the cooperation of the closable heat exchange groove and the pressing of the support ring 505.

[0024] Please refer to Figure 2 and Figures 6 - 8, the rear side of the guiding cover 401 is connected to the heating and blowing assembly 3 through a pipeline. The front side of the guiding cover 401 has an arc-shaped part, and the air outlet nozzle 402 is connected to the inner side of the arc-shaped part. The positioning assembly 6 includes a control board 601 and a driven gear 602. The driven gear 602 is rotatably connected to the top of the partition board. Rack bars 603 are engaged on both sides of the driven gear 602. One of the rack bars 603 is connected to one side of the control board 601, and the other rack bar 603 is connected to the bottom of the guiding cover 401. The rack bar 603 connected to the bottom of the guiding cover 401 passes through a hole opened on the side wall of the drying hopper 1 and extends outside the drying hopper 1. By pressing the control board 601, the other rack bar 603 and the guiding cover 401 are driven to move to the drying position; The front end of the control board 601 has an inclined surface, and an extrusion wedge plate 604 is in contact with one side of the inclined surface of the control board 601. The extrusion wedge plate 604 is connected to the outside of the driving rod 8 through a connecting rod 605. By rotating the driving rod 8, the inclined surface of the extrusion wedge plate 604 is driven to press the control board 601 to move outward; A sliding rod 606 is connected to one side of the control board 601. A sliding sleeve 608 is sleeved on the sliding rod 606. The sliding cylinder is connected to the top of the partition board. A third spring 607 is sleeved on the outside of the sliding rod 606. The two ends of the third spring 607 are respectively connected to the corresponding positions of the sliding sleeve 608 and one side of the control board 601; A telescopic rod 404 is connected to the rear side of the guiding cover 401. The other end of the telescopic rod 404 is connected to one side inside the protruding cavity of the drying hopper 1. A first spring 405 is sleeved on the outside of the telescopic rod 404. The two ends of the first spring 405 are respectively connected to the guiding cover 401 and one side inside the protruding cavity; Among them, a plurality of air outlet nozzles 402 can be arranged in an arc shape on the arc-shaped part of the guiding cover 401, and the cross-air outlet of the plurality of air outlet nozzles 402 can improve the drying contact uniformity.

[0025] Specifically: when the driving part 7 drives the driving rod 8 and the barrel 501 to rotate, the driving rod 8 can synchronously drive the extrusion wedge plate 604 to move through the connecting rod 605 on the outer peripheral side. The movement of the extrusion wedge plate 604 can press the control board 601 through the front inclined surface. When the control board 601 is pressed, it can drive the driven gear 602 to rotate through the rack bar 603. The rotation of the driven gear 602 can drive the other rack bar 603 and the guiding cover 401 to move inward. The guiding cover 401 moving inward can be sleeved on the outside of the barrel 501 at the corresponding position. Thus, when the barrel 501 is screwed into the corresponding position, the guiding cover 401 can be triggered to be positioned to output drying air. It is beneficial to avoid interfering with the rotation of the barrel 501 through the retractable guiding cover 401. At the same time, through the guiding cover 401 sleeved on the outside of the barrel 501, a plurality of air outlet nozzles 402 arranged opposite to each other on the circumferential side can improve the convective heating effect on the materials in the barrel 501; The top of the drying hopper 1 is provided with a cover body. The top of the cover body has a corresponding feeding pipeline. The top of the cover body is provided with an exhaust pipeline 9, and the exhaust pipeline 9 is located at the top of the heating and guiding component 4 at the corresponding heating and drying position. Furthermore, the heated water-containing air can be sucked and discharged through the corresponding exhaust pipeline 9 at the top, avoiding the spillage of the water-vapor-containing dry air in the drying hopper 1, preventing the particles in other cartridges 501 from being affected by the humid air and extending the storage duration.

[0026] Specifically, it includes the following steps: An efficient drying method for modified PP plastic particles. Different plastic particles are added to the corresponding storage component 5 according to the process requirements. When the storage component 5 rotates in the drying hopper 1, the rotation of the storage component 5 can adjust its position corresponding to the guiding cover 401. After the storage component 5 to be dried rotates to one side of the guiding cover 401 at the corresponding position, the guiding cover 401 can eject the gas sent by the external heating and blowing component 3 after blowing and heating the air, and the raw materials corresponding in the storage component 5 can be dried by the ejected gas.

[0027] In the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An efficient drying device for modified PP plastic particles, including a drying hopper (1), characterized in that, A guiding part (2) is connected to the bottom of the drying hopper (1). The bottom of the guiding part (2) has a discharge port. A plurality of material storage components (5) are rotatably connected to the inner cavity of the drying hopper (1). One side of the drying hopper (1) has a protruding cavity, and a heating guiding component (4) is slidably connected in the protruding cavity. The heating guiding component (4) includes a guiding cover (401). A drying medium cavity is provided in the guiding cover (401), and a plurality of air outlet nozzles (402) are provided in the drying medium cavity. The air outlet nozzles (402) are connected inside the guiding cover (401). By transferring the corresponding material storage component (5) into the guiding cover (401) for independent drying. One side of the heating guiding component (4) is communicated with a heating and blowing component (3). The heating and blowing component (3) is installed outside the drying hopper (1). A positioning component (6) for driving the guiding cover (401) to reciprocate is provided in the protruding cavity. The movement of the guiding cover (401) is used to avoid interfering with the rotation and switching of the material storage component (5).

2. The high-efficiency drying equipment for modified PP plastic particles according to claim 1, wherein, The bottom of the drying hopper (1) has a partition board, and a driving part (7) is installed on the top of the partition board. Openings are provided at the positions corresponding to the rotation strokes of the material storage components (5) on the top of the partition board. After a single rotation, the material storage component (5) is communicated with at least one opening. A driving rod (8) is rotatably connected to the top of the driving part (7). The outer peripheral side of the driving rod (8) is connected to the corresponding material storage component (5) through a connecting plate.

3. The high-efficiency drying equipment for modified PP plastic particles according to claim 1, characterized in that, The material storage component (5) includes a material cylinder (501). The top of the material cylinder (501) has a feed inlet, and the bottom of the material cylinder (501) has a quantitative discharging component. A plurality of heat exchange grooves are circumferentially formed along the axis on the outer peripheral side of the material cylinder (501). A receiving groove (507) is provided at the bottom of the heat exchange groove. A shielding block (502) is provided in the receiving groove (507). The shielding block (502) is configured to be slidably connected in the heat exchange groove. The ventilation volume of the material cylinder (501) is controlled by closing the heat exchange groove with the shielding block (502).

4. An efficient drying device for modified PP plastic particles according to claim 3, characterized in that, A filling pad (506) is connected to the top of the shielding block (502). The width and length of the filling pad (506) are greater than the width and length of the shielding block (502). The gap of the receiving groove (507) is closed by the filling pad (506) to improve the closing effect.

5. The high-efficiency drying equipment for modified PP plastic particles according to claim 2, characterized in that, Sliding holes are provided between a plurality of vertically arranged heat exchange grooves. A guiding rod (503) is slidably connected in the sliding holes. The two ends of the guiding rod (503) are connected to the adjacent shielding blocks (502). A support ring (505) is connected between the guiding rods (503) at the top. The support ring (505) is located at the top of the material cylinder (501). Pressing parts (403) are connected to both sides of the guiding cover (401) corresponding to the material cylinder (501). The front cross-sectional shape of the pressing part (403) is conical. The support ring (505) moves downward by the conical contact of the front side of the pressing part (403).

6. The high-efficiency drying equipment for modified PP plastic particles according to claim 5, characterized in that, A plurality of second springs (504) are connected to the bottom of the support ring (505) corresponding to the position of the guide rod (503). The two ends of the second spring (504) are respectively connected to the corresponding positions of the support ring (505) and one side of the barrel (501). An expansion rod (404) is connected to the rear side of the guide cover (401). The other end of the expansion rod (404) is connected to one side inside the protruding cavity of the drying hopper (1). A first spring (405) is sleeved outside the expansion rod (404), and the two ends of the first spring (405) are respectively connected to the guide cover (401) and one side inside the protruding cavity.

7. An efficient drying device for modified PP plastic particles according to claim 1, characterized in that, The rear side of the guide cover (401) is connected to the heating and air blowing assembly (3) through a pipeline. The front side of the guide cover (401) has an arc portion, and the air outlet nozzle (402) is connected to the inner side of the arc portion. The positioning assembly (6) includes a control board (601) and a driven gear (602). The driven gear (602) is rotatably connected to the top of the partition plate. Rack bars (603) are engaged on both sides of the driven gear (602). One of the rack bars (603) is connected to one side of the control board (601), and the other rack bar (603) is connected to the bottom of the guide cover (401). The rack bar (603) connected to the bottom of the guide cover (401) passes through a hole formed in the side wall of the drying hopper (1) and extends outside the drying hopper (1). By pressing the control board (601), the other rack bar (603) and the guide cover (401) are driven to move to the drying position.

8. The high-efficiency drying equipment for modified PP plastic particles according to claim 7, characterized in that, The front end of the control board (601) has an inclined surface, and an extrusion wedge plate (604) is in contact with one side of the inclined surface of the control board (601). The extrusion wedge plate (604) is connected to the outside of the driving rod (8) through a connecting rod (605). By rotating the driving rod (8), the inclined surface of the extrusion wedge plate (604) squeezes the control board (601) to move outward. One side of the control board (601) is connected to a sliding rod (606). A sliding sleeve (608) is sleeved outside the sliding rod (606). The sliding cylinder is connected to the top of the partition plate. A third spring (607) is sleeved outside the sliding rod (606). The two ends of the third spring (607) are respectively connected to the corresponding positions of the sliding sleeve (608) and one side of the control board (601).

9. An efficient drying device for modified PP plastic particles according to claim 8, characterized in that, A cover body is provided at the top of the drying hopper (1). The top of the cover body has a corresponding feeding pipeline. An exhaust pipeline (9) is provided at the top of the cover body, and the exhaust pipeline (9) is located at the top of the heating and guiding assembly (4) at the corresponding heating and drying position.

10. An efficient drying method for modified PP plastic particles, applied to the efficient drying equipment for modified PP plastic particles according to any one of claims 1-9, characterized in that, Specifically, it includes the following steps: Add different plastic particles into the corresponding storage component (5) according to the process requirements. When the storage component (5) rotates in the drying hopper (1), the rotation of the storage component (5) can adjust the position corresponding to the guide cover (401). After the storage component (5) to be dried rotates to one side of the guide cover (401) at the corresponding position, the guide cover (401) can spray the gas sent after blowing and heating the air by the external heating and air blowing assembly (3). The raw materials corresponding in the storage component (5) can be dried by the sprayed gas.

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