A plastic particle drying apparatus

Abstract

This application provides a plastic granule drying device, comprising: a frame; a storage cylinder mounted on the frame; a circulating cylinder coaxially fixed inside the storage cylinder, with its bottom end extending out of the bottom of the storage cylinder; a feed hopper installed at the portion of the circulating cylinder extending out of the storage cylinder; a main shaft coaxially rotatably connected inside the circulating cylinder; spiral blades fixed to the outer periphery of the main shaft; a heating tube for heating the air inside the storage cylinder; a return pipe installed at the bottom of the storage cylinder, with its other end extending into the feed hopper; and a drive motor for controlling the rotation of the main shaft. This application can increase the heating area of ​​the plastic granules, thereby improving the drying effect of the plastic granules.

Description

Technical Field

[0001] This application relates to the field of plastic particle drying technology, and more particularly to a plastic particle drying apparatus. Background Technology

[0002] Plastic granules are a raw material frequently used in the production of plastic products. To improve the quality and strength of plastic products, the plastic granules need to be dried before they are put into use.

[0003] For drying plastic granules, vertical plastic dryers are a common type of drying equipment. For example, Chinese patent CN215943437U discloses a vertical plastic granule dryer that, through the cooperation of a blower ring pipe and a stirring mechanism, can simultaneously deliver warm air from the top and bottom of the drum for drying, and circumferentially stir the plastic granules inside the drum. This allows the plastic granules to move and exchange heat in all directions within the drum, resulting in more uniform heating and higher actual drying efficiency.

[0004] However, the aforementioned patent still has some problems. When the plastic granules are concentrated in the barrel, the heat-receiving area of ​​each granule is reduced due to the stacking of the granules. The evaporation of moisture is mainly achieved by heat transfer between the granules, which reduces the overall efficiency of heat evaporation of moisture on the surface of the plastic granules. Even if there is a stirring structure to stir, it will still affect the overall heat drying effect of the plastic granules in the barrel. Utility Model Content

[0005] In order to solve the technical problems mentioned in the background art, the purpose of this application is to provide a plastic granule drying device that can increase the heating area and heating time of plastic granules, thereby improving the drying effect of plastic granules.

[0006] To achieve the above objectives, this application provides the following technical solution: A plastic pellet drying apparatus, comprising: frame; A storage cylinder, which is mounted on the frame; A circulating material cylinder is coaxially fixed inside the storage cylinder, with the bottom end of the circulating material cylinder extending out of the bottom of the storage cylinder; The feed hopper is equipped with the portion of the circulating material cylinder that extends out of the storage cylinder; The main shaft is coaxially rotatably connected inside the circulating material cylinder; A helical blade, the helical blade being fixed to the outer periphery of the main shaft; A heating element is installed inside the storage cylinder and is used to heat the air inside the storage cylinder. A return pipe is installed at the bottom of the storage cylinder, and the other end of the return pipe extends into the feed hopper; A drive motor is used to control the rotation of the main shaft.

[0007] In one possible implementation, The plastic particle crystallization and drying device also includes: The first guide vane is fixed to the inner wall of the storage cylinder. The first guide vane is in the shape of a first horn, and the top opening size of the first horn is larger than the bottom opening size.

[0008] In one possible implementation, The plastic particle crystallization and drying device also includes: The second guide vane is fixed to the outer wall of the circulating material cylinder. The second guide vane is in the shape of a second horn, and the top opening size of the second horn is smaller than the bottom opening size.

[0009] In one possible implementation, There are multiple first guide vanes and multiple second guide vanes, and the first guide vanes and the second guide vanes are alternately distributed in the vertical direction.

[0010] In one possible implementation, The plastic particle crystallization and drying device also includes: A hopper cover, which is installed on the feed hopper.

[0011] In one possible implementation, The main shaft is a hollow shaft, and the peripheral side of the main shaft is provided with uniform vent holes; The plastic particle crystallization and drying device also includes: A heating fan, the bottom end of which is connected to the bottom of the main shaft.

[0012] In one possible implementation, The plastic particle crystallization and drying device also includes: A gas rotary joint, wherein one end of the gas is fixed to the bottom end of the main shaft, and the other end of the gas rotary joint is connected to the outlet pipe of the heating fan.

[0013] In one embodiment, a discharge pipe is installed at the bottom of the storage cylinder.

[0014] Compared with the prior art, this application has the following advantages: This application heats the storage cylinder with a heating tube, and then uses a high-speed rotating spiral blade to lift the plastic granules from the feed hopper to the top of the circulating cylinder. Centrifugal force is used to scatter the plastic granules at the top of the circulating cylinder, causing them to fall in a dispersed manner and increasing the heating area of ​​each plastic granule. When the plastic granules fall to the bottom of the storage cylinder, they will re-enter the feed hopper through the return pipe, and then be lifted to the top of the circulating cylinder again by the spiral blade and scattered again. This cycle is repeated, which can effectively improve the overall drying efficiency of the plastic granules.

[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0016] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0017] Figure 1 A schematic diagram of the overall structure of an embodiment of this application is shown; Figure 2 A cross-sectional schematic diagram of the overall structure of an embodiment of this application is shown; Figure 3 A schematic diagram of the internal structure of the storage cylinder according to an embodiment of this application is shown.

[0018] Explanation of the labels in the diagram: 100. Rack; 200. Storage cylinder; 300. Circulating feed cylinder; 400. Feed hopper; 500, spindle; 510, vent hole; 600. Spiral blades; 700, heating element; 800, return pipe; 900. Drive motor; 1000, First guide vane; 1100, Second guide vane; 1200, Hopper cover; 1300. Heating fan; 1400, Gas Rotary Joint; 1500, Feed pipe. Detailed Implementation

[0019] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Firstly, existing crystallization and drying devices for plastic granules involve pouring the plastic granules into a drum and then using a stirring structure to tumble and stir the granules inside the drum, causing spatial changes between the granules. This drying method relies on heat transfer between the granules to allow all the granules to dry slowly. However, this method reduces the efficiency of heat evaporation of moisture from the surface of the plastic granules. Even with the stirring structure, the overall heat drying effect of the plastic granules inside the drum will still be affected.

[0021] In contrast, this application provides a plastic granule drying apparatus.

[0022] Among them, the appendix Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; attached. Figure 2 This is a cross-sectional schematic diagram of the overall structure of an embodiment of this application; attached. Figure 3 This is a schematic diagram of the internal structure of the storage cylinder in an embodiment of this application.

[0023] Please refer to the attached document. Figure 1 and attached Figure 2The plastic granule crystallization and drying apparatus of this application includes a frame 100, on which a storage cylinder 200 is mounted. A circulating cylinder 300 is coaxially fixed inside the storage cylinder 200, with the bottom end of the circulating cylinder 300 extending beyond the bottom of the storage cylinder 200. A feed hopper 400 is installed at the portion of the circulating cylinder 300 extending beyond the storage cylinder 200. Specifically, the feed hopper 400 is installed on the side wall of the circulating cylinder 300, and the feed hopper 400 and the circulating cylinder 300 should be in communication. A main shaft 500 is rotatably connected inside the circulating material cylinder 300. The rotation of the main shaft 500 is driven by a drive motor 900. Spiral blades 600 are fixed to the outer circumference of the main shaft 500. A return pipe 800 is installed at the bottom of the storage cylinder 200, with its other end extending into the feed hopper 400. The plastic granules at the bottom of the storage cylinder 200 are reintroduced into the feed hopper 400 through the return pipe 800 to achieve plastic granule circulation. A discharge pipe 1500 is also installed at the bottom of the storage cylinder 200 for discharging the dried plastic granules. In addition, multiple heating tubes 700 are uniformly fixed inside the storage cylinder 200. The heating tubes 700 are mainly used to heat the air inside the storage cylinder 200, thereby causing the surface moisture of the plastic granules to evaporate upon heating. It should be noted that a central control box for controlling the operating status of the drive motor 900 and the heating tube 700 should be installed on the frame 100, and the central control box should have control buttons for adjusting the drive motor 900 and the heating tube 700.

[0024] The following section provides a further explanation based on specific usage scenarios. When drying plastic granules, the drive motor 900 and heating tube 700 are controlled by buttons on the central control box to heat the inside of the storage cylinder 200 and drive the spiral blades 600 to rotate. The plastic granules to be dried are then poured into the feed hopper 400. Under the action of the high-speed rotating spiral blades 600, the plastic granules in the feed hopper 400 are lifted until they reach the highest point of the circulating material cylinder 300. Under centrifugal force, the plastic granules disperse and fall into the storage cylinder 200. Thus, from the top of the circulating material cylinder 300 to the bottom of the storage cylinder 200, the plastic granules are relatively separated and scattered, increasing the contact area between the granules and the hot air, ensuring that each granule is exposed to the hot air and dried inside the storage cylinder 200. After falling to the bottom of the storage cylinder 200, the plastic granules fall back into the feed hopper 400 through the return pipe 800, and are then lifted back to the top from the bottom of the circulating material cylinder and dispersed again, thus completing the cycle. After drying is complete, the discharge pipe 1500 is opened to release the dried plastic granules from the storage cylinder 200 and collect them.

[0025] Overall, this application heats the storage cylinder 200 using heating tube 700, and then uses high-speed rotating spiral blades 600 to lift the plastic granules from the feed hopper 400 to the top of the circulating cylinder 300. Centrifugal force is used to scatter the plastic granules at the top of the circulating cylinder 300, causing them to fall in a dispersed manner and increasing the heating area of ​​each plastic granule. When the plastic granules fall to the bottom of the storage cylinder 200, they will re-enter the feed hopper 400 through the return pipe 800, and then be lifted again by the spiral blades 600 to the top of the circulating cylinder 300 and scattered again. This cycle is repeated, which can effectively improve the overall drying efficiency of the plastic granules.

[0026] Please refer to the attached document. Figure 2 and attached Figure 3 As a specific embodiment of this application, the plastic granule crystallization and drying device of this application further includes a first guide plate 1000 and a second guide plate 1100. The first guide plate 1000 is fixed to the inner wall of the storage cylinder 200 and is in the shape of a first trumpet, with the top opening size of the first trumpet shape being larger than the bottom opening size. The second guide plate 1100 is fixed to the outer wall of the circulating cylinder 300 and is in the shape of a second trumpet, with the top opening size of the second trumpet shape being smaller than the bottom opening size.

[0027] Based on specific application scenarios, by setting the first guide vane 1000 and the second guide vane 1100, after the plastic particles are lifted to the top of the circulating material cylinder 300 and dispersed into the storage cylinder 200 under the action of centrifugal force, they first fall onto the first guide vane 1000 or the second guide vane 1100. This prevents the plastic particles from falling directly to the bottom of the storage cylinder 200 under the action of gravity, thereby increasing the time for the plastic particles to fall in the storage cylinder 200 and thus increasing the drying time of the plastic particles, thereby improving the drying effect of the plastic particles.

[0028] For further details, please refer to the appendix. Figure 2 and attached Figure 3 In this application, there are multiple first guide vanes 1000 and second guide vanes 1100, and the first guide vanes 1000 and second guide vanes 1100 are alternately distributed in the vertical direction.

[0029] Based on specific application scenarios, by setting up multiple first guide vanes 1000 and multiple second guide vanes 1100, and alternating the first guide vanes 1000 and second guide vanes 1100 in the vertical direction, the plastic particles will pass through the first guide vanes 1000 and second guide vanes 1100 in sequence during the falling process, which further increases the falling time of the plastic particles, and further increases the drying time of the plastic particles in the storage cylinder 200, thereby improving the drying effect of the plastic particles.

[0030] Please refer to the appendix. Figure 1 and attached Figure 3 As a specific embodiment of this application, the plastic granule crystallization and drying device of this application further includes a hopper cover 1200, which is installed on the feed hopper 400. During the feeding operation, the feed hopper 400 is opened by opening the hopper cover 1200, allowing material to be poured into the feed hopper 400. After the feeding operation is completed, the feed hopper 400 is closed by the hopper cover 1200, thereby reducing heat loss from the feed hopper 400 and improving the drying efficiency of the plastic granules to a certain extent.

[0031] Please refer to the appendix. Figure 2 As a specific implementation of this application, the main shaft 500 of this application is a hollow shaft, and uniform exhaust holes 510 are provided on the peripheral side of the main shaft 500. Furthermore, the plastic granule crystallization drying apparatus of this application also includes a heating fan 1300, the bottom end of which is connected to the bottom end of the main shaft 500. Here, the heating fan 1300 refers to a device capable of heating gas and supplying high-heat gas.

[0032] Furthermore, the plastic particle crystallization drying device of this application also includes a gas rotary joint 1400, with one end of the gas rotary joint fixed to the bottom end of the main shaft 500, and the other end of the gas rotary joint 1400 connected to the outlet pipe of the heating fan 1300. The main purpose of installing the gas rotary joint 1400 is to ensure that the rotation of the main shaft 500 is not affected and that high-temperature air can be supplied normally to the cavity of the main shaft 500.

[0033] Depending on the specific application scenario, when drying plastic granules, the high-speed rotating spiral blades 600 will lift the plastic granules upward from the feed hopper 400. During the process of the plastic granules being lifted by the spiral, the heating fan 1300 will supply heated high-temperature gas into the main shaft 500, and release the high-temperature gas to the outside through the exhaust port 510 on the main shaft 500. This allows the plastic granules to be dried while being lifted in the circulating material cylinder 300, thereby improving the drying efficiency of the plastic granules.

[0034] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A plastic granule drying device, characterized in that, include: Rack (100); A storage cylinder (200) is mounted on the frame (100); A circulating material cylinder (300) is coaxially fixed inside the storage cylinder (200), and the bottom end of the circulating material cylinder (300) extends out of the bottom of the storage cylinder (200); Feed hopper (400), wherein the feed hopper (400) is installed at the part of the circulating material cylinder (300) that extends out of the storage cylinder (200); Main shaft (500), which is coaxially rotatably connected inside the circulating material cylinder (300); A helical blade (600) is fixed to the outer periphery of the main shaft (500); A heating tube (700) is installed inside the storage cylinder (200) and is used to heat the air inside the storage cylinder (200); A return pipe (800) is installed at the bottom of the storage cylinder (200), and the other end of the return pipe (800) extends into the feed hopper (400); A drive motor (900) is used to control the rotation of the spindle (500).

2. The plastic granule drying device according to claim 1, characterized in that, The plastic particle crystallization and drying device also includes: The first guide vane (1000) is fixed to the inner wall of the storage cylinder (200). The first guide vane (1000) is in the shape of a first horn, and the top opening size of the first horn is larger than the bottom opening size.

3. The plastic granule drying apparatus according to claim 2, characterized in that, The plastic particle crystallization and drying device also includes: The second guide vane (1100) is fixed to the outer wall of the circulating material cylinder (300). The second guide vane (1100) is in the shape of a second horn, and the top opening size of the second horn is smaller than the bottom opening size.

4. The plastic granule drying apparatus according to claim 3, characterized in that, There are multiple first guide vanes (1000) and second guide vanes (1100), and the first guide vanes (1000) and second guide vanes (1100) are alternately distributed in the vertical direction.

5. The plastic granule drying apparatus according to claim 1, characterized in that, The plastic particle crystallization and drying device also includes: A hopper cover (1200) is installed on the feed hopper (400).

6. The plastic granule drying apparatus according to claim 1, characterized in that, The main shaft (500) is a hollow shaft, and the peripheral side of the main shaft (500) is provided with uniform exhaust holes (510). The plastic particle crystallization and drying device also includes: A heating fan (1300) is provided, the bottom end of which is connected to the main shaft (500).

7. The plastic granule drying apparatus according to claim 6, characterized in that, The plastic particle crystallization and drying device also includes: A gas rotary joint (1400) is provided, with one end of the gas rotary joint fixed to the bottom end of the main shaft (500), and the other end of the gas rotary joint (1400) connected to the outlet pipe of the heating fan (1300).

8. The plastic granule drying apparatus according to claim 1, characterized in that, The bottom of the storage cylinder (200) is equipped with a discharge pipe (1500), which is connected to the storage cylinder (200).

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