A plastic particle integrated deodorization circulating homogenization system

Abstract

This invention discloses an integrated deodorization and circulation homogenization system for plastic granules. The system features a two-stage partition within the post-drying chamber, dividing the chamber into three independent cavities: an outer partition, a middle partition, and an inner partition. Two sets of coils enable differentiated airflow to each zone, creating a tiered temperature field. The middle partition contains multiple spiral tracks, which, along with the V-shaped guide channel and vertical discharge port at the bottom of the outer partition, direct the material flow. The first coil provides lateral airflow, propelling the granules spirally upwards along the tracks, enhancing VOC and odor removal in the high-temperature range near the softening point. The second coil provides tangential airflow along the conical second partition, creating a swirling flow that allows the granules to undergo tiered cooling and deep deodorization in the low-temperature range. This solution solves the problems of traditional equipment, such as single temperature control, uneven material heating, insufficient air-material contact, and easy agglomeration. It ensures orderly material flow, uniform deodorization, and high temperature control accuracy, guaranteeing product quality and production efficiency, and is suitable for large-scale continuous production of various types of plastic granules.

Description

Technical Field

[0001] This invention relates to the field of plastic pellet processing equipment, and more specifically to an integrated deodorization, circulation, and homogenization system for plastic pellets. Background Technology

[0002] In the plastic granule production process, the resulting granules often contain residual low-molecular-weight organic compounds and volatile odor components released during production. Without specialized deodorization treatment, this not only reduces the quality of finished plastic products but also negatively impacts the subsequent processing environment and user experience. Therefore, post-drying deodorization has become an indispensable and crucial step in plastic granulation production lines. Currently, the industry commonly uses traditional hot air post-drying equipment for plastic granule deodorization. This type of equipment relies on a unified air supply and constant temperature heating throughout the entire chamber, using hot air circulation to remove volatile substances escaping from the granules. While it achieves basic deodorization, it exposes many unavoidable problems in actual continuous production.

[0003] Traditional post-drying chambers typically employ a single-chamber structure without internal zoned airflow or layered temperature control. The entire air supply system maintains a uniform hot air temperature, making it impossible to achieve gradient temperature control based on the different stages of material deodorization. To ensure deodorization efficiency, the equipment usually sets the overall chamber temperature close to the softening point of the plastic granules. Materials exposed to a single high-temperature environment for extended periods are prone to uneven heating in certain areas. Some granules soften, stick together, or even melt and clump due to prolonged contact with the high-temperature airflow, damaging the granule shape and causing material loss. If the overall heating temperature is lowered to avoid high-temperature damage to the material, it directly reduces the desorption rate of volatile organic compounds and odor molecules, significantly lengthening the overall processing time and hindering production efficiency.

[0004] From the perspective of airflow and material conveying structure, existing post-drying equipment mostly adopts a direct-blowing airflow layout, resulting in a single airflow direction. Materials within the silo move freely up and down without any constraints on their trajectory. This not only makes it difficult to accurately control the air-material contact time but also easily leads to problems such as material cross-flow, localized material accumulation, and blockage of pipes and air vents, forcing frequent equipment shutdowns for cleaning and affecting the continuous operation of the production line. Furthermore, conventional post-drying silos only have simple exhaust structures at the top, making it difficult for the internal airflow pressure to self-balance. During operation, turbulent air pressure and airflow backflow are prone to occur, further interfering with hot air circulation and normal material flow. Although some equipment is equipped with a cooling structure, the temperature fluctuation within the silo is significant after switching between hot and cold air, making it difficult to achieve a smooth, stepped cooling within the effective deodorization temperature range. During the rapid cooling phase, particles are also prone to re-adsorbing residual volatile components from the environment, significantly reducing the effectiveness of the initial deodorization operation.

[0005] Meanwhile, traditional post-drying deodorization equipment has a relatively limited function, only capable of completing basic processes such as heating, deodorization, and cooling. It cannot simultaneously perform surface modification treatment of plastic granules to meet production needs. Enterprises often need to add independent modification stations and supporting equipment, which not only increases the production line's floor space and equipment investment costs, but also increases material handling losses and labor costs due to the multi-process transfer. In summary, current traditional post-drying deodorization equipment for plastic granules has many shortcomings, such as a single temperature control mode, uneven material heating, insufficient air-material contact, poor operational stability, and low functional integration. It is gradually becoming difficult to adapt to the high-quality, high-efficiency, and integrated production requirements of high-end plastic products. The industry urgently needs a new post-drying deodorization system with more optimized structure and process to solve the various pain points of existing technologies. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated deodorization and circulation homogenization system for plastic granules, addressing the shortcomings of existing technologies.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: An integrated deodorization and circulation homogenization system for plastic granules includes a post-drying chamber, a feeding chamber, a negative pressure system, and an air intake system; The post-drying chamber is a particle deodorization processing chamber with a cylindrical body and a conical bottom. The post-drying chamber is also equipped with an air guide ring and a dispersion plate. The top of the post-drying chamber is equipped with an exhaust port, and a mesh screen is installed inside the exhaust port. The feeding hopper is located at the top of the rear drying chamber, and the lower end of the feeding hopper is connected to the rear drying chamber through a controlled discharge valve; The negative pressure system's negative pressure pipeline is connected to the feed hopper and provides it with negative pressure. The feed hopper has two sets of pipelines connected to its side: the first set is the feeding pipeline and the second set is the homogenization pipeline. Both sets of pipelines are equipped with shut-off valves. By switching the shut-off valves, the negative pressure can be used to attract and feed material particles at different positions. The other end of the homogenization pipeline is connected to the lower end of the conical bottom. When the feeding pipeline is closed and the homogenization pipeline is opened (at this time, the discharge valve is closed in a controlled manner to establish negative pressure), the negative pressure in the feed hopper is used to attract the material in the drying chamber to circulate and feed back into the feed hopper. The air intake system includes a coil section, an air intake pipe, a heating unit, a bypass pipe, and a blower. The rear drying chamber has at least one coil section around its outer perimeter. One end of the air intake pipe is connected to the coil section, and the other end is connected to the blower outlet. The air intake pipe is equipped with a heating unit. The air intake pipe of the heating unit is divided into an upstream pipe and a downstream pipe. The upstream pipe is connected between the blower and the heating unit inlet, and the downstream pipe is connected between the heating unit outlet and the coil section. A bypass pipe is connected in parallel with the heating unit. The inner side of the coil section is connected to the rear drying chamber through multiple evenly distributed inclined pipes.

[0008] Furthermore, a phase change energy storage structure is provided, which creates a constant temperature field in the post-drying chamber that is close to the softening temperature of the plastic particles. In actual use, it can be set to 3-10℃ lower than the softening temperature of the plastic particles to be processed. One or more of the post-drying chamber, air inlet pipe, coil section, air guide ring, and dispersion plate are equipped with phase change energy storage structures. The phase change energy storage structure includes an inner layer, a middle layer, and an outer layer. An intermediate layer is provided between the inner layer and the outer layer. The intermediate layer contains at least one sealed pressure-bearing cavity filled with phase change energy storage material. The phase change energy storage material is configured to have a softening critical temperature that matches the plastic particles to be processed.

[0009] Furthermore, the exhaust vent is connected to a heat recovery pipeline; The intermediate layer also includes a sandwich tube, which is coaxially sleeved around the periphery of the sealed pressure-bearing cavity. The phase change energy storage structure forms a multi-layer coaxial composite sleeve structure. The heat recovery pipeline is connected to the interlayer pipe of the phase change energy storage structure. Fresh air enters the inner layer pipe formed by the inner layer, and exhaust gas discharged from the exhaust port enters the interlayer pipe.

[0010] Furthermore, the air inlet pipe is equipped with a vapor phase additive atomization and dispensing unit, and the exhaust port is equipped with a circulation branch, the other end of which is connected to the blower inlet; the vapor phase additive atomization and dispensing unit includes an additive storage tank, a metering and conveying component, and an atomizing nozzle; the additive storage tank contains a plastic particle surface modification additive, and the outlet of the additive storage tank is sequentially equipped with a metering and conveying component and an atomizing nozzle; the metering and conveying component controls the additive flow rate, and the atomizing nozzle sprays the additive into the air inlet system; the exhaust port is switched to the circulation branch, so that the circulating air carrying the additive circulates in the rear drying chamber.

[0011] Furthermore, a zoned temperature field is formed within the rear drying chamber. The number of coils in the coil section corresponds to the number of temperature field zones within the rear drying chamber. Different coil sections have different air supply temperatures. This can be achieved by setting independent heating units or adjusting the hot / cold air ratio, allowing each coil section to supply air to the rear drying chamber at different temperatures. The differentiated air supply enters the corresponding zones within the rear drying chamber, creating a zoned temperature field. The plastic particles circulate between zones with different temperatures within the rear drying chamber, allowing the various differentiated temperatures to act on the plastic particles sequentially within the same rear drying chamber.

[0012] Furthermore, the rear drying chamber is coaxially equipped with a first partition and a second partition. The first partition and the rear drying chamber wall form an annular outer chamber, the first and second partitions form a middle partition, and the inner side of the second partition forms an inner partition. The upper part of the outer partition is open and connected to a dispersing disc through its upper opening. The dispersing disc guides the plastic particles into the outer partition. The bottom of the outer partition is connected to the middle partition through a discharge port. The bottom of the middle partition is separated from the inner partition. The upper opening of the middle partition is located inside the conical opening at the bottom of the dispersing disc. The coil section has two rings, namely a first coil and a second coil. The first coil connects to the bottom of the middle partition to guide the plastic particles... The upward blowing of the particles provides the power, causing the plastic particles to rise, collide with the bottom wall of the dispersion disc, and fall into the inner compartment. The second coil is connected to the inner compartment. The air supply temperature of the second coil is lower than that of the first coil. In actual use, the air supply temperature of the first coil can be close to or slightly higher than the softening point temperature of the plastic particles, so that the particles are heated to near the softening point temperature in the middle compartment, effectively improving the deodorization efficiency. When falling into the inner compartment, since the temperature in this compartment is controlled to be lower than the softening point temperature, a zoned temperature field is formed. This zoned temperature field is used to form a "step-down cooling" effect, and the temperature remains stable after cooling, and the cooling range is not large, still within the effective deodorization temperature range.

[0013] Furthermore, a spiral track is coiled inside the intermediate compartment, and the particles spiral upward in the intermediate compartment along the preset spiral track. Multiple strands of the spiral track are coaxially wound, and the first coil is provided with air outlets corresponding to each spiral track.

[0014] Furthermore, the second partition cylinder is arranged in a conical structure with a smaller upper opening and a larger lower opening, and the air outlet of the second coil is arranged tangentially along the second partition cylinder.

[0015] Furthermore, the dispersion disc is provided with a vent pipe, the lower end of which is formed on the dispersion disc, and a mesh with the same taper as the dispersion disc is provided inside the opening.

[0016] Furthermore, the lower part of the outer compartment is provided with V-shaped guide grooves corresponding to each spiral track, and the bottom of the guide groove is provided with a vertical material drop port. The air outlet is located below the material drop port and is perpendicular to the axis of the material drop port.

[0017] The advantages and beneficial effects of this invention are as follows: 1. Zoned temperature field + stepped cooling design: The chamber is divided into independent temperature zones with differentiated air supply. The material first passes through the high temperature zone to quickly remove VOCs and odors, and then is gradually cooled to the effective deodorization temperature zone. The entire process avoids the critical temperature for material softening, and completely solves the problems of easy clumping and reverse adsorption of odors after cooling in traditional single-temperature zone equipment.

[0018] 2. Material conveying and flow guidance optimization: V-shaped guide troughs and spiral tracks combined with directional air outlets ensure that the material travels in a regular trajectory, without accumulation or jamming, and the material is evenly distributed.

[0019] 3. Excellent gas-material heat exchange effect: The particles spiral upward and swirl, prolonging the gas-material contact time. Combined with the whole-area air distribution, the deodorization is more uniform and thorough, and the finished product quality is highly consistent.

[0020] 4. Strong equipment operation stability: The dispersion disc is equipped with a breathable pipe with a mesh screen to balance the air pressure in the chamber, prevent particles from clogging the pipes, and ensure continuous operation of the production line.

[0021] 5. Good expandability: It is compatible with functional modules such as phase change energy storage, additive atomization, and hot air circulation, and has energy-saving and surface modification capabilities, making it suitable for processing various types of plastic granules. Attached Figure Description

[0022] Figure 1 This is a perspective view of an integrated deodorization and circulation homogenization system for plastic granules according to the present invention. Figure 2 This is a schematic diagram of the internal cross-section of the rear drying chamber in this invention; Figure 3 This is one of the schematic diagrams of the integrated deodorization and homogenization system in this invention; Figure 4 This is the second schematic diagram of the integrated deodorization and homogenization system in this invention; Figure 5 This is a schematic diagram of the multi-stage partition structure formed in the rear drying chamber of the present invention; Figure 6 This is a planar unfolded schematic diagram of the first partition cylinder and the second partition cylinder in this invention; In the diagram: 1. Rear drying chamber; 2. Feed hopper; 3. Negative pressure system; 4. Air inlet system; 5. Air guide ring; 6. Dispersion disc; 7. Exhaust outlet; 8. Partition screen; 9. Material discharge valve; 10. Negative pressure pipeline; 11. Feeding pipeline; 12. Homogenization pipeline; 13. Shut-off valve; 14. Coil section; 15. Air inlet pipe; 16. Heating unit; 17. Bypass pipe; 18. Blower; 19. Upstream pipeline; 20. Downstream pipeline; 21. Inner layer; 22. Outer layer; 23. 24. Sealed pressure-bearing cavity; 25. Jacketed pipe; 26. Intermediate layer; 27. Heat recovery pipeline; 28. Circulation branch; 29. ​​Additive storage tank; 30. Metering and conveying assembly; 31. Atomizing nozzle; 32. First partition cylinder; 33. Second partition cylinder; 34. Outer compartment; 35. Intermediate compartment; 36. Inner compartment; 37. Material discharge port; 38. First coil; 39. Second coil; 40. Spiral track; 41. V-shaped guide channel; 42. Inclined pipe; 43. Vent pipe. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described below with reference to examples. These examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] Example 1: An integrated deodorization and circulation homogenization system for plastic granules, such as Figure 1 As shown, it includes a rear drying chamber 1, a feeding chamber 2, a negative pressure system 3, and an air intake system 4; The post-drying chamber 1 is a particle deodorization processing chamber with a cylindrical body and a conical bottom. The post-drying chamber 1 is generally cylindrical, with plastic particles inside and hot air circulating at a preset temperature, thereby achieving the deodorization effect on the plastic particles within the post-drying chamber 1; Figure 2 As shown, the rear drying chamber 1 is also equipped with an air guide ring 5 and a dispersion disc 6. The air guide ring 5 is a conical ring set at the bottom of the rear drying chamber 1. Its upper opening is large and its lower opening is small. Its upper opening is attached to the inner wall of the rear drying chamber 1, and its lower opening forms a downward-opening air guide cavity between the outer side and the inner wall of the rear drying chamber 1. A coil section 14 is fitted on the outer wall of the rear drying chamber 1. The coil section 14 is an annular pipe for the air intake system 4 to evenly distribute the air intake in the rear drying chamber 1. The coil is branched with multiple inclined pipes 41. The inclined pipes 41 open downward and enter the air guide cavity, thereby forming a downwardly evenly distributed guide air intake for the fresh air entering the rear drying chamber 1. The guide air intake is directed towards the center of the conical bottom. The fresh air introduced towards the center of the conical bottom blows onto the falling granular material, which can heat the granular material to remove odor or cool it down.

[0025] The air intake system 4 includes a coil section 14, an air intake pipe 15, a heating unit 16, a bypass pipe 17, and a blower 18. The rear drying chamber 1 has at least one ring of coil sections 14 around its outer periphery. Based on the aforementioned analysis, the annular coil sections 14 are used to uniformly distribute the circumferential airflow into the rear drying chamber 1, making the internal airflow distribution more uniform. In actual use, the number of coil sections 14 is not limited, but at least one ring is required. The attached drawings of this embodiment show two rings as an example, forming a distribution pattern where they are coaxially nested within the rear drying chamber 1. Each coil section 14 has a ring of inclined pipes 41 communicating with the rear drying chamber 1. One end of the air intake pipe 15 connects to the coil section 14, and the other end connects to the outlet of the blower 18. In actual use, the blower 18 can be selected according to the actual airflow and pressure requirements. A positive displacement blower 18, such as a Roots blower 18 or a screw blower 18, can be selected. The blower 18 is a blade type, such as a centrifugal blower 18 or an axial flow blower 18. In this embodiment, a Roots blower 18 is used as an example. A heating unit 16 is provided on the air inlet pipe 15. The heating unit 16 can be electrically heated. Fresh air is drawn in by the blower 18 and enters the heating unit 16. After heating, the hot air is sent into the coil section 14 and finally evenly distributed into the rear drying chamber 1. The air inlet pipe 15 of the heating unit 16 is divided into an upstream pipe 19 and a downstream pipe 20. The upstream pipe 19 connects the blower 18 and the inlet of the heating unit 16, and the downstream pipe connects the outlet of the heating unit 16 and the coil section 14. A bypass pipe 17 is connected in parallel with the heating unit 16. The two ends of the bypass pipe 17 are connected to the upstream pipe 19 and the downstream pipe 20 respectively, forming a parallel structure with the heating unit 16. In actual use, such as... Figure 1 , 3 As shown, a control valve is installed at the front end of the heating unit 16, and a similar control valve is installed on the bypass pipe 17 to switch the parallel pipeline. When the heating unit 16 is in use, it performs hot drying operation on the rear drying chamber 1; when switching to the bypass pipe 17, the heating unit 16 stops operating, and cold air can be quickly switched to be sent into the rear drying chamber 1 to form a cooling cycle for the plastic particles. The rear drying chamber 1 is provided with an exhaust port 7 at the top, and a mesh 8 is provided inside the exhaust port 7. In order to form a circulation of drying air inside the rear drying chamber 1, the hot drying air in this embodiment is designed for single use. After hot drying, the exhaust gas containing VOCs is directly discharged to the exhaust gas treatment equipment through the pipeline. In order to prevent the airflow from blowing the plastic particles upward and blowing them out of the exhaust port 7, a mesh 8 is set to separate the plastic particles. The mesh size of the mesh 8 is smaller than the particle size. In this way, the fresh air drawn in from the outside can be continuously heated and enter the rear drying chamber 1 to perform hot drying and deodorization of the materials inside, and the exhaust gas is discharged from the exhaust port 7.

[0026] It is understood that the control valve on the bypass pipe 17 can be used to regulate the temperature at the rear of the heating unit 16. When the outlet temperature of the heating unit 16 exceeds the limit, the bypass pipe 17 can be opened to a certain degree so that the cold air can neutralize and cool the hot air to a suitable temperature.

[0027] The above describes the airflow circulation within the rear drying chamber 1. To further optimize the circulation of particles, a feeding chamber 2 is provided at the top of the rear drying chamber 1. The lower end of the feeding chamber 2 is connected to the rear drying chamber 1 through a controlled discharge valve 9. The discharge valve 9 can be automatically controlled, automatically opening to discharge when a certain preset condition is met, or it can be manually and remotely controlled to open.

[0028] The negative pressure pipeline 10 of the negative pressure system 3 is connected to the feed hopper 2 and provides negative pressure to it. The feed hopper 2 is connected to two sets of pipelines on its side. The first set is the feeding pipeline 11 and the second set is the homogenization pipeline 12. Both sets of pipelines are equipped with shut-off valves 13. By switching the shut-off valves 13, the negative pressure of the material particles at different positions is used to attract the material. The other end of the homogenization pipeline 12 is connected to the lower end of the conical bottom. When the feeding pipeline 11 is closed and the homogenization pipeline 12 is opened (at this time, the discharge valve 9 is closed in a controlled manner to establish negative pressure in the feed hopper 2), the negative pressure in the feed hopper 2 is used to attract the material in the drying chamber 1 to circulate and feed to the feed hopper 2. The feed hopper 2 and the drying chamber 1 are connected by a soft connection and weighing and discharging.

[0029] Specifically, when the first set of pipelines is in use, the plastic granules to be processed are fed into the feed hopper 2. At this time, the homogenization pipeline 12 of the second set is closed, the discharge valve 9 is closed, and the negative pressure system 3 establishes negative pressure on the feed hopper 2. When the negative pressure reaches the required level, the shut-off valve 13 on the feed pipeline 11 is opened, so that the feed pipeline 11 sucks up the plastic granules to be processed into the feed hopper 2, and then the feed pipeline 11 is closed.

[0030] After feeding is completed, the plastic granules are circulated in the rear drying chamber 1 by controlling the discharge valve 9. Specifically, after the discharge valve 9 is closed, the feed chamber 2 gradually establishes negative pressure. At this time, the shut-off valve 13 of the homogenization pipeline 12 is opened, so that the plastic granules accumulated in the conical bottom can be drawn into the upper feed chamber 2 through the homogenization pipeline 12. When the feed chamber 2 accumulates to a certain amount, the discharge valve 9 is opened to allow the plastic granules to fall from the top of the rear drying chamber 1 and be evenly dispersed to the inside periphery through the dispersion disc 6. At the same time, the hot air blown in by the coil section 14 flows upward and exchanges heat with the falling plastic granules in a countercurrent manner, so that the heat drying and deodorization can be carried out more evenly. After this feeding is completed, the discharge valve 9 is closed again to establish negative pressure in the feed chamber 2, thus forming a cycle of plastic granules. This cycle can be repeated several times to form "circulating homogenization", which can then completely deodorize the plastic granules.

[0031] Example 2: In the aforementioned embodiments, a coil + fixed air guide ring 5 structure is used to homogenize the hot air distribution. However, it relies on the heating unit 16 to heat the air, resulting in large temperature fluctuations and potentially large temperature differences in the material layer within the chamber. Local overheating can easily cause the plastic particles to soften, stick together, and melt. Furthermore, relying solely on continuous electric heating for supplemental heating of the hot air leads to uneven and transient heat supply. To address this issue, this embodiment further incorporates a phase change energy storage structure. This structure creates a constant temperature field within the post-drying chamber 1 that is close to the softening point of the plastic particles. In actual use, it can be set and controlled to be 3-10°C below the softening point of the plastic particles to be processed, while maintaining a continuously stable temperature within the post-drying chamber 1. Specifically, a phase change energy storage structure is provided in one or more of the following components: post-drying chamber 1, air inlet pipe 15, coil section 14, air guide ring 5, and dispersion plate 6. The phase change energy storage structure includes an inner layer 21, a middle layer 25, and an outer layer 22, forming a sleeve-like structure. The middle layer 25 is disposed between the inner layer 21 and the outer layer 22. The middle layer 25 contains at least one sealed pressure-bearing cavity 23 filled with phase change energy storage material. The phase change material can be graded according to the softening point of the plastic to suit different types of plastics. The phase change temperature is matched according to the softening critical temperature of the plastic particles to ensure that "the constant temperature range falls exactly in the VOC high-efficiency desorption temperature range and is lower than the softening temperature". For example: 1. General-purpose polyolefins (PE / PP): phase change temperature 70~75℃; 2. ABS / PS general-purpose modified materials: phase change temperature 80~85℃; 3. Low-melting-point soft plastics / recycled materials: phase change temperature 60~65℃; 4. Engineering plastics (PA / POM): phase change temperature 90~95℃. The phase change energy storage material is configured to have a softening critical temperature that matches the plastic particles to be processed.

[0032] Taking a simple example of setting a phase change energy storage structure in the air inlet duct 15 and the coil section 14, when the temperature detection of the heating unit 16 exceeds the limit after heating the fresh air, its temperature equalization is delayed in detection. The overheated material will irreversibly enter the post-drying chamber 1, thereby raising the temperature inside the chamber and easily causing the plastic particles to soften and stick together. In this embodiment, a phase change energy storage structure can be set in the air inlet system 4 pipeline between the outlet of the heating unit 16 and the post-drying chamber 1. Utilizing the physical properties of phase change energy storage materials such as constant temperature heat storage, heat release, and waste heat recovery, the overheated gas that has been sent out from the heating unit 16 is heat-absorbing, and the excess heat is transferred to the phase change energy storage material for storage. Specifically: 1. Heat absorption stage: The hot air temperature is slightly higher than the phase change temperature. The PCM absorbs and stores heat to suppress the temperature rise of the components and surrounding areas, thus achieving passive constant temperature. 2. Heat release stage: The power of heating unit 16 fluctuates, the fresh air temperature decreases and falls below the phase change temperature, the PCM slowly releases latent heat, and maintains a constant temperature throughout the entire area for a long time. In practical implementation, the composite sleeve structure of the phase change energy storage structure can have the following characteristics: the inner layer 21 can be made of 304 stainless steel ventilation pipe (the inner layer 21 forms the inner layer 21 pipe, used for hot air circulation, retaining the original air duct flow capacity, and the air resistance remains unchanged); the middle layer 25 is a sealed pressure-bearing cavity 23, filled with phase change energy storage material (the main heat storage layer, used for heat storage; it can be understood that the sealed pressure-bearing cavity 23 is equipped with inlet and outlet valves, through which the liquefied phase change energy storage material can be replaced to adapt to different types of plastic particle deodorization); the outer layer 22 can be made of 304 stainless steel ventilation pipe. In actual use, the inner diameter of the outer layer 22 pipe is larger than that of the inner layer 21 pipe, so that the sandwich between the two forms the sealed pressure-bearing cavity 23 of the middle layer 25, which is used to fill the phase change energy storage material.

[0033] In this embodiment, the air inlet duct 15 can be formed into a phase change energy storage structure using a straight pipe sleeve structure, while the coil section 14 can be formed into a sleeve structure using a circular annular tube. Furthermore, the entire outer wall of the rear drying chamber 1 can be processed into a sleeve structure for phase change energy storage. Similarly, the conical air guide ring 5 and the dispersion disc 6 can also be made in a sleeve form, thereby forming a phase change energy storage structure throughout the interior of the rear drying chamber 1, thus creating a relatively constant temperature field inside and effectively preventing the softening and adhesion of plastic particles.

[0034] Example 3: This embodiment is a further improvement on the phase change energy storage structure of the aforementioned embodiment 2. Specifically, a heat recovery pipeline 26 is connected to the exhaust port 7. As we know from embodiment 1, the hot air for the post-drying chamber 1 is for single use. The exhaust air discharged from the exhaust port 7 contains volatile organic compounds (VOCs) and cannot be recycled for heat treatment. The exhaust air has a relatively suitable temperature. If the heat is not utilized and is directly discharged to the exhaust gas treatment system, it will result in serious heat waste.

[0035] Specifically, in Embodiment 2, a phase change energy storage structure with a sleeve-type structure is designed. In this embodiment, the intermediate layer 25 is further improved to include a sandwich tube 24, such as... Figure 3As shown, the interlayer tube 24 is coaxially sleeved around the outer periphery of the sealed pressure-bearing cavity 23. The phase change energy storage structure forms a multi-layer coaxial composite sleeve structure, which is actually an additional interlayer tube 24 outside the sealed pressure-bearing cavity 23. Thus, an inner tube and an outer tube for airflow are formed on the inner and outer sides of the cavity containing the phase change energy storage structure, respectively. The inner tube is attached to the inner side of the sealed pressure-bearing cavity 23, while the interlayer tube 24 on the outer side of the sealed pressure-bearing cavity 23 is used to circulate the hot exhaust gas sent out by the exhaust port 7. The heat energy recovery pipeline 26 is connected to the interlayer tube 24 of the phase change energy storage structure. Fresh air enters the inner layer 21 tube formed by the inner layer 21, and the exhaust gas discharged from the exhaust port 7 enters the interlayer tube 24. This allows the phase change energy storage structure to absorb and store heat from the outer layer of the interlayer tube 24, supplementing the heat of the fresh air in the inner tube. The two are separated by the phase change energy storage structure and do not directly contact each other, thus preventing volatile organic compounds in the exhaust gas from re-entering the post-drying chamber 1. Furthermore, it can absorb and utilize the heat from the exhaust gas. Due to the supplementary heat from the exhaust gas, the heating power of the heating unit 16 can be appropriately reduced to save energy. (This embodiment is attached...) Figure 3 In this example, the heat recovery pipeline 26 is set on the downstream pipeline 20. In actual use, it is preferable to connect the heat recovery pipeline to the interlayer pipe 24 of the upstream pipeline 19, so that the unheated fresh air can be preheated and the heat of the exhaust gas can be utilized in a tiered manner, that is, it first enters the downstream pipeline 20 for primary heat utilization and then enters the upstream pipeline 19 for secondary heat utilization.

[0036] Example 4: This embodiment further optimizes and upgrades upon the aforementioned Embodiment 3, adding a vapor-phase additive atomization and dispensing unit and an exhaust gas recirculation branch 27 to achieve simultaneous deodorization and surface modification of plastic granules, while also improving hot air utilization and enhancing the deodorization effect. After pelletizing, low-temperature surface polarity control is required (to improve the bonding force between the granules and the additives and matrix, or to control hydrophobic / hydrophilic properties). Traditionally, this involves offline plasma treatment and chemical spraying and drying, a cumbersome process. This solution utilizes a phase change isothermal field + hot air atmosphere + trace amounts of functional vapor-phase additives to complete in-situ vapor-phase surface modification of the granules while simultaneously performing post-drying deodorization.

[0037] The vapor phase additive atomization and dispensing unit includes an additive storage tank 28, a metering and delivery assembly 29, and an atomizing nozzle 30, such as Figure 4 As shown, the unit is assembled on the air inlet pipe 15, and the upstream pipe 19 section is located between the blower 18 and the heating unit 16. It mainly consists of three parts: the additive storage tank 28, the metering and conveying component 29, and the atomizing nozzle 30, so as to realize the quantitative, atomized, and uniform mixing of the additive into the fresh air. The additive storage tank 28 contains plastic particle surface modification additives. The additives can be selected according to the type of plastic and production needs, such as deodorizing and enhancing additives, surface compatibility additives, antistatic additives, toughening additives, etc. The tank is equipped with a feeding port and a pressure relief valve to ensure continuous production and safe use.

[0038] The outlet of the additive storage tank 28 is sequentially equipped with a metering conveying component 29 and an atomizing nozzle 30. The metering conveying component 29 is connected between the outlet of the additive storage tank 28 and the atomizing nozzle 30, and adopts a combination structure of a precision metering pump and a flow regulating valve. The additive conveying flow rate can be set according to the total amount of material in the post-drying chamber 1 and the air volume of the inlet, so as to accurately control the additive addition ratio, avoid excessive or insufficient additive residue, and adapt to the production requirements of different specifications of plastic granules.

[0039] Atomizing nozzle 30: Fixedly installed on the inner side of the air inlet pipe 15. The atomizing agent delivered by the metering and conveying assembly 29 is dispersed into micron-sized droplets by the high-pressure atomizing structure and completely dispersed in the fresh air flow delivered by the blower 18 to form a mixed air flow containing the agent; the mixed air flow then enters the heating unit 16 for heating and finally enters the rear drying chamber 1 along with the hot air; This embodiment can be used in the cooling stage after hot drying and deodorization. By modifying the surface of the particles with additives, a protective film structure can be formed to prevent the particles from being contaminated by volatile organic compounds again. In this embodiment, on the one hand, high-temperature hot air removes VOCs and odor molecules from inside the granules to complete the deodorization process; on the other hand, after deodorization, the atomized additive comes into full contact with the surface of the plastic granules with the airflow, and the temperature state of the granules enhances the adhesion and penetration of the additive, effectively improves the cooling efficiency, and simultaneously completes the surface modification of the granules, realizing the integrated processing of deodorization and modification in the same equipment.

[0040] The exhaust vent 7 is switched to the circulation branch 27, so that the circulating air with the additives circulates in the rear drying chamber 1. In the aforementioned embodiment, the exhaust gas should not be directly circulated into the rear drying chamber 1. However, in this embodiment, since it is in the cooling stage after the hot drying and deodorization is completed, the VOCs and odor molecules in the exhaust gas have been completely removed by the hot drying, so it can meet the standard for recycling. The advantage of recycling the exhaust gas at this time is that it can reduce the loss of additives and can form a recycling process during circulation.

[0041] Specifically, an independent circulation branch 27 is added at the exhaust vent 7 at the top of the rear drying chamber 1. The end of the branch is connected to the inlet of the blower 18. A switching butterfly valve is installed at the exhaust vent 7 to allow free switching between two airflow modes: direct exhaust mode and circulation mode.

[0042] Airflow switching logic: Conventional direct discharge mode: Close the valve of circulation branch 27, and the exhaust gas containing VOCs is transported to the exhaust gas treatment equipment along the original path. It is suitable for the initial drying stage where the VOCs concentration is high and the exhaust gas needs to be discharged quickly.

[0043] Circulating operation mode: Close the original direct discharge pipeline valve and open the circulation branch valve 27. The air that has completed heat exchange in the rear drying chamber 1 and carries the atomizing agent flows back from the exhaust port 7 through the circulation branch 27 to the blower 18 inlet, is drawn back by the blower 18, and re-enters the air intake system 4 to form a closed-loop circulating air path.

[0044] Working principle of circulating air path: After switching to circulation mode, the airflow carrying additives and residual heat continuously flows back and forth between the rear drying chamber 1, circulation branch 27, and air intake system 4. The circulating airflow significantly prolongs the contact time between the additives and plastic particles, allowing the modified additives to fully act on the particle surface, improving the uniformity of modification and the quality of the finished product. Understandably, in order to achieve the ideal cooling rate, the fresh air inlet of the original blower 18 can be opened appropriately to supplement fresh air.

[0045] Example 5: This embodiment modifies the internal cavity structure and coil air supply system of the post-drying chamber 1 by layering and partitioning. By partitioning the chamber with partition cylinders and using multiple sets of coils for differentiated temperature control and air supply, a multi-level zoned temperature field is constructed inside the post-drying chamber 1. This allows the plastic particles to pass through different temperature zones sequentially to achieve stepped heating and gradient temperature control for deodorization. The post-drying chamber 1 forms a zoned temperature field. The number of coils in the coil section 14 corresponds to the number of temperature field partitions in the post-drying chamber 1. The air supply temperature of different coil sections 14 is different (by setting independent heating units 16 or adjusting the hot / cold air ratio), so that each coil section 14 provides differentiated air supply to the post-drying chamber 1. The differentiated air supply enters the corresponding zone of the post-drying chamber 1, thus forming a zoned temperature field within the post-drying chamber 1. The plastic particles circulate between different temperature zones within the post-drying chamber 1, allowing the differentiated temperatures to act on the plastic particles sequentially within the same post-drying chamber 1.

[0046] The warehouse's partitioned structural design, specifically, such as... Figure 5 As shown, the first partition cylinder 31 and the second partition cylinder 32 are coaxially mounted inside the rear drying chamber 1, dividing the chamber space into three independent yet interconnected cavity areas from the outside to the inside (the number of partition cylinders is not limited in actual use and can be increased or decreased as needed), namely the outer partition chamber 33, the middle partition chamber 34, and the inner partition chamber 35. The connection method of each cavity is integrated with the material flow direction. Outer compartment 33: An annular cavity formed by the rear drying chamber 1 cylinder wall and the first compartment 31. The upper part of the cavity is open and directly connects to the top dispersion disc 6. After the plastic granules are fed into the feed hopper 2, they are guided by the dispersion disc 6 and fall entirely into the outer compartment 33. The bottom of the outer compartment 33 has a discharge port 36, through which the material can enter the next stage cavity (i.e., the intermediate compartment 34).

[0047] The intermediate compartment 34 is formed by the first compartment 31 and the second compartment 32. Its bottom receives material falling from the outer compartment 33, and its bottom connects to the air supply channel of the first coil 37. The upper part of the intermediate compartment 34 has an opening located inside the conical opening at the bottom of the dispersing disc 6. This opening serves as a turning channel for the material after it is conveyed upwards. Plastic particles collide with the tilted dispersing disc 6 and enter the inner compartment 35. The intermediate compartment 34 and the bottom inner compartment 35 are separated, allowing the material to be conveyed upwards and deodorized during this upward conveying process.

[0048] Inner compartment 35: The central cavity formed by the inner side of the second compartment 32 serves as the area where materials finally reside, and where gradient cooling and deodorization take place. The side wall / bottom of the cavity is connected to the air supply channel of the second coil 38.

[0049] The coil section 14 is provided with two coils, namely a first coil 37 and a second coil 38. The first coil 37 is connected to the bottom of the middle compartment 34 to provide power for blowing the plastic particles upward. The plastic particles rise and collide with the bottom wall of the dispersing disk 6, turn and fall into the inner compartment 35. The second coil 38 is connected to the inner compartment 35. The entire diaphragm structure enables the directional flow of materials from top to bottom, then from bottom to top, and finally down again, ensuring that the particles move in an orderly manner between the three chambers.

[0050] The coil's zoned air supply and temperature control, specifically: Combining the three-zone structure of the chamber, two independent coil sections 14, namely the first coil 37 and the second coil 38, are installed. The number of coil coils corresponds one-to-one with the temperature zone level within the chamber. The two sets of coils are equipped with independent temperature control systems to achieve differentiated air supply. 1. Temperature control implementation method The two sets of coils can each be equipped with an independent heating unit 16 and have their own air supply temperature set; or they can share the main air duct and precisely control their respective air supply temperature by adjusting the ratio of hot air and bypass cold air. Both methods can stably achieve temperature difference air supply.

[0051] 2. First coil 37 (corresponding to intermediate partition 34) The coil air duct connects to the bottom of the middle compartment 34, with the airflow direction upward. On one hand, the airflow acts as a driving force, blowing the plastic granules falling from the outer compartment 33 upward; on the other hand, it provides high-temperature air, with the supply air temperature controlled to be close to or slightly higher than the softening point of the plastic granules. During the upward conveying process, the granules are in a high-temperature environment close to the softening point, and the VOCs and odor molecules inside the granules will quickly migrate and volatilize outward, significantly improving the deodorization rate.

[0052] 3. Second coil 38 (corresponding to inner compartment 35) The air duct of this coil is connected to the inner compartment 35. The supply air temperature is significantly lower than that of the first coil 37, and the overall temperature is still maintained within the effective desorption range of VOCs. The temperature of the inner compartment 35 should be lower than the softening point of plastic. After the plastic particles have been deodorized by the relatively high temperature of the middle compartment 34, in order to avoid them being close to the softening point for a long time and thus "softening", when the particles enter the inner compartment 35, the temperature is slightly lower than that of the middle compartment 34. This can relatively cool down the plastic particles and keep them in a better deodorization temperature range, so as to avoid softening of the particles while effectively deodorizing them. The air supply temperature of the second coil 38 is lower than that of the first coil 37. In actual use, the air supply temperature of the first coil 37 can be close to or slightly higher than the softening point temperature of the plastic particles, so that the particles are heated to near the softening point temperature in the middle compartment 34, effectively improving the deodorization efficiency. When falling into the inner compartment 35, since the temperature in this compartment is lower than the softening point temperature, a zoned temperature field is formed. This zoned temperature field is used to form a "step-down cooling" effect, and the temperature remains stable after cooling, and the cooling range is not large, still within the effective deodorization temperature range.

[0053] The workflow is as follows: 1. Feeding and Discharging: Plastic granules fall through the top feeding bin 2 and the discharge valve 9, and are evenly guided to the outer compartment 33 by the dispersing disc 6. The granules slide down to the bottom discharge port 36 of the outer compartment 33 under the action of gravity.

[0054] 2. High-temperature enhanced deodorization: The particles enter the bottom of the intermediate compartment 34 from the discharge port 36. The first coil 37 sends out a high-temperature airflow, which carries the particles upward. The high-temperature environment accelerates the precipitation of odor substances inside the particles, completing high-intensity deodorization. After the particles rise to the upper opening of the intermediate compartment 34, they hit the bottom wall of the dispersion disc 6 and change direction, and fall into the central inner compartment 35.

[0055] 3. Stepped Temperature Stabilization Deodorization: The particles entering the inner compartment 35 come into contact with the low-temperature airflow from the second coil 38, creating a stepped cooling effect. This cooling process is gradual, keeping the temperature inside the compartment stable. This avoids problems such as softening, sticking, and melting of the particles due to continuous high temperatures, while also preventing the interruption of VOCs desorption due to excessively low temperatures. The particles complete deep deodorization within this temperature range.

[0056] 4. Circulating operation: The particles can rely on the chamber structure and homogenization pipeline 12 to repeatedly circulate between the three temperature zones of outer chamber 33, middle chamber 34 and inner chamber 35, alternately undergoing high temperature enhanced deodorization and medium and low temperature stable deodorization until the VOCs and odor indicators meet the standards.

[0057] This embodiment utilizes temperature zones in a tiered manner, balancing efficiency and safety. It departs from the traditional single-temperature mode for the entire warehouse, using a high-temperature zone to quickly remove most odor substances, followed by deep purification through a gradient low-temperature zone. This process avoids material damage caused by localized overheating and is suitable for processing various easily softened plastic granules. Each coil has independent temperature control, allowing for flexible adjustment of the two-stage air supply temperature difference and temperature values ​​based on different plastic materials and VOC content, resulting in greater equipment adaptability.

[0058] Example 6: Based on the partitioned silo and differentiated temperature control air supply in Example 5, this embodiment further optimizes the material movement path, air outlet form, flow guide structure, and ventilation protection. Through structural designs such as spiral track 39, tangential air supply, flow guide groove, and ventilation pipe 42, the uniformity of material movement, air-material contact efficiency, and equipment operation stability are further improved.

[0059] Specifically, such as Figure 5 As shown, a spiral track 39 is coiled within the intermediate compartment 34. The particles spiral upward within the intermediate compartment 34 along the preset spiral track 39. Multiple spiral tracks 39 are coaxially arranged, and the first coil 37 is provided with air outlets corresponding to each spiral track 39. Multiple spiral tracks 39 are coaxially arranged within the intermediate compartment 34. After entering from the bottom discharge port 36 of the outer compartment 33, the particles do not rise in a straight line, but rather spiral upward along the spiral tracks 39 under the action of airflow. The tracks limit the material's trajectory, extending the residence time of the particles in the high-temperature range, allowing more time for VOCs and odor substances to be released, thus enhancing the high-temperature deodorization effect; at the same time, it avoids particle clumping and local accumulation, ensuring that each particle is heated evenly. The air outlets of the first coil 37 are arranged one-to-one with each spiral track 39, with the air outlet facing the direction of material movement along the track. The directional airflow lifts and pushes the particles along the track throughout the process, and the airflow and particles make full countercurrent contact, which greatly improves the efficiency of hot air heat exchange and deodorization; the layout of multiple tracks and multiple air outlets achieves full-area air supply without dead corners in the middle compartment.

[0060] Furthermore, the lower part of the outer compartment 33 is provided with V-shaped guide grooves 40 corresponding to each spiral track 39. Utilizing the converging and guiding effect of the V-shaped structure, the scattered particles in the outer compartment 33 are accurately collected to the bottom of the groove. A vertical discharge port 36 is opened at the bottom of the groove, through which the particles fall vertically to the middle compartment 34; Figure 6The diagram shows the planar unfolded view of the first partition cylinder 31 and the second partition cylinder 32. It can be seen that the solid lines represent multiple sequentially connected inner V-shaped guide channels 40 formed after the outer outer compartment 33 is flattened. When particles fall, they are evenly distributed within each V-shaped guide channel 40, ensuring that the material falling from the bottom of each guide channel's discharge port 36 is uniformly delivered to the middle compartment 34. The inclined air inlets 41 of the first coil 37 are arranged below the discharge ports 36, and the inclined air inlets 41 are perpendicular to the axis of the discharge ports 36. Vertically falling particles are smoothly redirected upon encountering lateral airflow and smoothly enter the corresponding spiral track 39, achieving integrated directional material guidance and airflow propulsion, preventing material blockage and deviation, and ensuring balanced feed rate across each track. Figure 6 The spiral tracks 39 shown are all local structures at the starting end.

[0061] Furthermore, the second partition cylinder 32 is configured with a conical structure that is smaller at the top and larger at the bottom (not shown in the figure, but can be referenced). Figure 5 (Understanding) The conical, inclined sidewall structure prevents plastic particles from being blown upwards and backflowing into the intermediate compartment 34 by the second coil 38. If particles are blown upwards, they will collide with the inclined conical wall with a smaller opening and fall back down. Furthermore, the air outlet of the second coil 38 is arranged tangentially along the second partition 32, and the airflow will form a swirling airflow field along the wall of the partition after it is ejected. The swirling airflow carries the particles and continuously tumbles and flows in the inner compartment 35. Combined with the relatively low constant temperature environment in this area, the particles are in full contact with the airflow, completing gradient cooling and deep deodorization. The swirling structure also prevents local particle deposition and improves the consistency of the entire batch of materials being processed.

[0062] Furthermore, the dispersing disc 6 is provided with a vent pipe 42, the lower end of which is opened on the dispersing disc 6, and a mesh 8 with the same taper as the dispersing disc 6 is provided inside the opening. The vent pipe 42 allows the airflow blown from the first coil 37 and the second coil 38 to pass upward through the dispersing disc 6 and be discharged from the top exhaust port 7, thereby facilitating airflow circulation in the rear drying chamber 1. The mesh 8 on the vent pipe 42 serves the same purpose as the mesh 8 at the exhaust port 7, which is to intercept plastic particles and prevent the particles from passing through the dispersing disc 6. It can be understood that the upper conical surface of the dispersing disc 6 is used to disperse the particles falling from the feed hopper 2, and the lower surface of the dispersing disc 6 is used to prevent the particles in the middle compartment 34 from flowing back to the upper surface and guide them into the inner compartment 35.

[0063] In this embodiment, the spiral track 39+V-shaped guide trough enables directional material movement, preventing accumulation and jamming, and resulting in a more balanced material distribution. The two motion modes—track-type climbing and tangential swirling—extend the air-material contact time, further enhancing the deodorization effect.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made 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. An integrated deodorization and circulation homogenization system for plastic granules, characterized in that, Includes a rear drying chamber, a feeding hopper, a negative pressure system, and an air intake system; The rear drying chamber is a chamber with a cylindrical body and a conical bottom. The rear drying chamber is also equipped with an air guide ring and a dispersion plate. The top of the rear drying chamber is equipped with an exhaust port. The feeding hopper is located at the top of the rear drying chamber, and the lower end of the feeding hopper is connected to the rear drying chamber through a controlled discharge valve; The negative pressure pipeline of the negative pressure system is connected to the feed hopper and provides negative pressure to it. Two sets of pipelines are connected to the side of the feed hopper. The first set is the feeding pipeline and the second set is the homogenization pipeline. The other end of the homogenization pipeline is connected to the lower end of the conical bottom. The air intake system includes a coil section, an air intake pipe, a heating unit, a bypass pipe, and a blower. The rear drying chamber is provided with at least one coil section around its outer perimeter. One end of the air intake pipe is connected to the coil section, and the other end is connected to the blower outlet. The air intake pipe is provided with a heating unit, and a bypass pipe is provided in parallel with the heating unit. The coil section evenly delivers air into the rear drying chamber.

2. The integrated deodorization and circulation homogenization system for plastic granules according to claim 1, characterized in that, A phase change energy storage structure is provided, which creates a constant temperature field in the post-drying chamber that is close to the softening temperature of plastic particles. One or more of the post-drying chamber, air inlet pipe, coil section, air guide ring, and dispersion plate are equipped with a phase change energy storage structure. The phase change energy storage structure includes an inner layer, a middle layer, and an outer layer. An intermediate layer is provided between the inner layer and the outer layer. The intermediate layer contains at least one sealed pressure-bearing cavity filled with phase change energy storage material. The phase change energy storage material is configured to have a softening critical temperature that matches the plastic particles to be processed.

3. The integrated deodorization and circulation homogenization system for plastic granules according to claim 2, characterized in that, The exhaust vent is connected to a heat recovery pipeline; The intermediate layer also includes a sandwich tube, which is coaxially sleeved around the periphery of the sealed pressure-bearing cavity. The phase change energy storage structure forms a multi-layer coaxial composite sleeve structure. The heat recovery pipeline is connected to the interlayer pipe of the phase change energy storage structure. Fresh air enters the inner layer pipe formed by the inner layer, and exhaust gas discharged from the exhaust port enters the interlayer pipe.

4. The integrated deodorization and homogenization system for plastic granules according to any one of claims 1-3, characterized in that, The air inlet pipe is equipped with a vapor phase additive atomization and dispensing unit, and the exhaust port is equipped with a circulation branch, the other end of which is connected to the blower inlet. The vapor phase additive atomization and dispensing unit includes an additive storage tank, a metering and conveying component, and an atomizing nozzle. The additive storage tank contains a plastic particle surface modification additive. The outlet of the additive storage tank is sequentially equipped with a metering and conveying component and an atomizing nozzle. The metering and conveying component controls the additive flow rate, and the atomizing nozzle sprays the additive into the air inlet system. The exhaust port is switched to the circulation branch, so that the circulating air carrying the additive circulates in the rear drying chamber.

5. The integrated deodorization and circulation homogenization system for plastic granules according to claim 1, characterized in that, The rear drying chamber forms a zoned temperature field. The number of coils in the coil section corresponds to the number of temperature field zones in the rear drying chamber. Different coil sections have different air supply temperatures, resulting in differentiated air supply to the rear drying chamber. The differentiated air supply enters the corresponding zone of the rear drying chamber, thus forming a zoned temperature field. The plastic particles circulate between zones with different temperatures in the rear drying chamber, allowing the differentiated temperatures to act on the plastic particles sequentially within the same rear drying chamber.

6. The integrated deodorization and circulation homogenization system for plastic granules according to claim 5, characterized in that, The rear drying chamber is coaxially equipped with a first partition and a second partition. The first partition and the rear drying chamber wall form an annular outer partition, the first partition and the second partition form a middle partition, and the inner side of the second partition forms an inner partition. The dispersing disc guides the plastic particles into the outer partition. The bottom of the outer partition is connected to the middle partition through a discharge port. The bottom of the middle partition is separated from the inner partition. The upper opening of the middle partition is located inside the conical opening at the bottom of the dispersing disc. The coil section has two coils, namely a first coil and a second coil. The first coil is connected to the bottom of the middle partition to provide power for blowing the plastic particles upward. The plastic particles rise, collide with the bottom wall of the dispersing disc, and fall into the inner partition. The second coil is connected to the inner partition. The air temperature of the second coil is lower than that of the first coil.

7. The integrated deodorization and circulation homogenization system for plastic granules according to claim 6, characterized in that, The intermediate compartment is equipped with a spiral track, and the particles rise spirally within the intermediate compartment along the preset spiral track. Multiple strands of the spiral track are coaxially wound, and the first coil is equipped with air outlets corresponding to each spiral track.

8. The integrated deodorization and homogenization system for plastic granules according to claim 6, characterized in that, The second partition cylinder has a conical structure with a smaller top opening and a larger bottom opening.

9. The integrated deodorization and circulation homogenization system for plastic granules according to claim 6, characterized in that, The dispersion disc is provided with a vent pipe, the lower end of which is formed on the dispersion disc, and a mesh with the same taper as the dispersion disc is provided inside the opening.

10. The integrated deodorization and homogenization system for plastic granules according to claim 7, characterized in that, The lower part of the outer compartment is provided with V-shaped guide grooves corresponding to each spiral track. The bottom of the guide groove is provided with a vertical material drop port. The air outlet is located below the material drop port and is perpendicular to the axis of the material drop port.

Images