A modified plastic particle drying device

Abstract

The utility model discloses a kind of drying device of modified plastic particle, comprising: the drying cylinder of conical structure, the middle part of the drying cylinder is fixedly connected with conveying pipe, the inside rotation of the conveying pipe is connected with the spiral conveying rod for conveying and the material is thrown out conveying pipe, the outside of the conveying pipe is equidistant and a plurality of air inlet through holes are set, the side of the drying cylinder is provided with the circulation material pipe for circulating material, the beneficial effects of the utility model are: through the conveying and tumbling effect of spiral conveying rod, make plastic particles in conveying process with hot air fully contact, improve drying efficiency.The conical structure of drying cylinder and the setting of material from the top of conveying pipe, cooperate the setting of circulation material pipe so that material can be circulated and dried, ensure that material is evenly dried, increase the contact area of material and air, and facilitate circulation heating and discharging, by circulating drying, can make full use of heat energy, reduce energy waste.

Description

Technical Field

[0001] This utility model relates to the field of modified plastic granule processing technology, specifically to a drying device for modified plastic granules. Background Technology

[0002] Modified plastic granules (also called modified plastic pellets) are a type of plastic raw material that improves the properties of ordinary plastics through physical or chemical modification. Through modification, the physical, chemical, and mechanical properties of the plastic are enhanced or adjusted to meet specific application requirements. During the processing of modified plastic granules, drying is necessary to remove moisture and prevent problems such as bubbles, uneven crystallization, and color differences caused by moisture during heating. Currently, this is mostly achieved by evaporating the moisture from the plastic granules using hot air or hot air. The plastic granules are placed in a drying oven or drying chamber and dried by stirring, ensuring they come into contact with hot air. However, because the stirring process cannot guarantee that every granule will have uniform contact with the hot air, especially those at the bottom, some granules may not dry sufficiently due to prolonged exposure to areas with less hot air. This results in varying moisture content among the granules, affecting the quality of the final product. Utility Model Content

[0003] The purpose of this invention is to provide a drying device for modified plastic granules to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a drying device for modified plastic granules, comprising:

[0005] A conical drying cylinder has a conveying pipe fixedly connected to its middle section. Inside the conveying pipe, a spiral conveying rod is rotatably connected for conveying and throwing materials out of the conveying pipe. Multiple air inlet holes are equidistantly opened on the outer side of the conveying pipe. A circulating material pipe for circulating materials is provided on one side of the drying cylinder.

[0006] The heating section is located at the bottom of the drying cylinder. The heating section includes a fan fixed to the bottom of the drying cylinder. A heating pipe for heating air is installed at the output end of the fan. A hot air pipe is fixedly connected to the top of the heating pipe. The hot air pipe is directed to a downward air delivery pipe.

[0007] The dehumidification section is located on one side of the fan and is used to circulate and dehumidify the hot air inside the drying cylinder.

[0008] Preferably, a feed inlet is provided on one side of the bottom of the conveying pipe, and a feed funnel is fixedly connected to the bottom of the conveying pipe on the side of the feed inlet.

[0009] Preferably, the circulating material pipe is located above the feed funnel, and a discharge pipe is fixedly connected to one side of the bottom of the drying cylinder. Both the circulating material pipe and the discharge pipe are equipped with gate valves in the middle.

[0010] Preferably, a motor for driving the spiral conveyor is installed at the bottom of the conveying pipe, the length of the spiral conveyor is greater than the length of the conveying pipe, and the top of the spiral conveyor is rotatably connected to the top of the drying cylinder.

[0011] Preferably, the output end of the fan is connected to the heating tube via a Y-shaped pipe, and an electric heating wire is fixed inside the heating tube.

[0012] Preferably, the dehumidification unit includes a dehumidification box fixed to the bottom of the drying drum. The dehumidification box is connected to the air inlet of the fan through a pipe, and the end of the dehumidification box away from the fan is connected to the inside of the drying drum through an exhaust pipe.

[0013] Preferably, the dehumidification box has multiple partition plates fixedly connected inside, and a heat exchange tube is installed between two connected partition plates. Both ends of the heat exchange tube are equipped with diversion pipes. A sealing cover is fixedly connected to the top of the dehumidification box, and the sealing cover is fixedly connected to the heat exchange tube.

[0014] Compared with existing technologies, the beneficial effects of this invention are as follows: The conveying and tumbling action of the spiral conveyor ensures that the plastic granules are in full contact with the hot air during conveying, improving drying efficiency. The conical structure of the drying drum and the material being thrown from the top of the conveying pipe, combined with the circulating material pipe, allow the material to circulate and dry, ensuring uniform drying, increasing the contact area between the material and air, and facilitating circulating heating and discharge. Circulating drying fully utilizes thermal energy and reduces energy waste. The dehumidification section dehumidifies the hot air through heat exchange pipes, effectively reducing the humidity inside the drying drum, improving drying efficiency, and preventing material sticking or incomplete drying due to excessive humidity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the drying cylinder of this utility model;

[0017] Figure 3 This is a schematic diagram of the heating element of this utility model;

[0018] Figure 4 This is a schematic diagram of the heat exchange tube of this utility model;

[0019] Figure 5 This is a schematic diagram showing the position and structure of the extraction pipe of this utility model;

[0020] Figure 6 This is a schematic diagram of the conveying pipe of this utility model.

[0021] In the diagram: 1. Drying cylinder; 2. Feed hopper; 3. Conveying pipe; 4. Air inlet; 5. Screw conveyor; 6. Motor; 7. Fan; 8. Heating tube; 9. Heating wire; 10. Hot air duct; 11. Exhaust pipe; 12. Dehumidification box; 13. Divider plate; 14. Heat exchange tube; 15. Circulating feed pipe; 16. Discharge pipe; 17. Sealing cover plate; 18. Diverter pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, this utility model provides a technical solution: a drying device for modified plastic granules, comprising: a conical drying cylinder 1, a thermometer and hygrometer installed on the outside of the drying cylinder 1, the measuring end of the thermometer and hygrometer placed inside the drying cylinder 1, a conveying pipe 3 fixedly connected to the middle of the drying cylinder 1, a spiral conveying rod 5 rotatably connected inside the conveying pipe 3 for conveying and throwing materials out of the conveying pipe 3, multiple air inlet holes 4 equidistantly opened on the outside of the conveying pipe 3 for heating the plastic granules inside the conveying pipe 3, a circulating material pipe 15 for circulating materials on one side of the drying cylinder 1; a heating part located at the bottom of the drying cylinder 1, including a fan 7 fixedly connected to the bottom of the drying cylinder 1, a heating pipe 8 for heating air installed at the output end of the fan 7, a hot air pipe 10 fixedly connected to the top of the heating pipe 8, one end of the hot air pipe 10 inserted into the interior of the drying cylinder 1, and the air outlet direction of the hot air pipe 10 facing downward towards the conveying pipe 3; and a dehumidification part located on one side of the fan 7 for circulating and dehumidifying the hot air inside the drying cylinder 1.

[0024] It should be noted that a power distribution box and a corresponding controller are provided in this embodiment, and corresponding operation buttons are provided on the outside of the power distribution box. Plastic granules are fed from the bottom of the drying cylinder 1 into the bottom of the conveying pipe 3. Under the conveying action of the spiral conveyor 5, the spiral conveyor 5 conveys the material upward inside the conveying pipe 3. During the conveying process, the air blown out by the fan 7 is heated by the heating pipe 8 and then blown towards the conveying pipe 3. While the air heats the conveying pipe 3, it enters the conveying pipe 3 through the air inlet 4 and comes into contact with the conveyed material. During the pushing process of the spiral conveyor 5, the material is continuously tumbling, so that it can come into contact with the air and the heated conveying pipe 3, thereby achieving drying. The hot air forms a high-temperature environment in the drying cylinder 1. When the spiral conveyor 5 conveys the material to the top of the conveying pipe 3, the material is thrown outward under the rotation of the spiral conveyor 5, so that it comes into contact with the air during the fall. The dried material enters the bottom of the conveying pipe 3 again from the circulating material pipe 15 for conveying, thereby achieving circulating heating. The hot air is dehumidified by the dehumidification section and then reheated before entering the interior of the drying cylinder 1, thereby reducing the internal humidity.

[0025] In one embodiment, a feed inlet is provided on one side of the bottom of the conveying pipe 3, and a feed funnel 2 is fixedly connected to the bottom of the conveying pipe 3 on one side of the feed inlet. The circulating material pipe 15 is located above the feed funnel 2, and a discharge pipe 16 is fixedly connected to one side of the bottom of the drying cylinder 1. Both the circulating material pipe 15 and the discharge pipe 16 are equipped with gate valves in the middle.

[0026] It should be noted that in this embodiment, the modified plastic granules are poured into the inside of the feeding funnel 2, which is inclined downwards. The modified plastic granules enter the feed inlet on one side of the conveying pipe 3 along the bottom slope of the feeding funnel 2. The screw conveyor 5 conveys them upwards by rotating. When the material is scattered inside the drying cylinder 1, the valve of the circulating material pipe 15 is opened, and the modified plastic granules re-enter the inside of the feeding funnel 2 from the circulating material pipe 15, thereby achieving circulating drying. After drying is completed, the valve of the circulating material pipe 15 is closed, and the valve of the discharge pipe 16 is opened, thereby discharging the modified plastic granules accumulated inside the drying cylinder 1 from the discharge pipe 16.

[0027] In one embodiment, a motor 6 for driving the spiral conveying rod 5 is installed at the bottom of the conveying pipe 3. The length of the spiral conveying rod 5 is greater than the length of the conveying pipe 3, and the top of the spiral conveying rod 5 is rotatably connected to the top of the drying cylinder 1.

[0028] It should be noted that in this embodiment, a reducer is fixedly connected to the output end of the motor 6. The reducer is fixedly connected to the bottom of the conveying pipe 3 and its output end is fixed to the spiral conveying rod 5. The motor 6 drives the spiral conveying rod 5 to rotate and convey the material. Because the spiral conveying rod 5 is relatively long, the material is thrown outward from the top of the conveying pipe 3.

[0029] In one embodiment, the output end of the fan 7 is connected to the heating tube 8 through a Y-shaped pipe, and an electric heating wire 9 is fixed inside the heating tube 8.

[0030] It should be noted that in this embodiment, the outer side of the heating tube 8 is wrapped with glass wool, which is a heat insulation layer made of fine glass fibers. The fan 7 blows air through the heating tube 8 and the hot air pipe 10 to the air inlet 4. The air is heated by the heating wire 9 inside the heating tube 8. While heating the air inlet 4, the hot air also heats the inside of the drying cylinder 1.

[0031] In one embodiment, the dehumidification unit includes a dehumidification box 12 fixed to the bottom of the drying cylinder 1. A drain pipe is installed at the bottom of the dehumidification box 12, and a valve is installed in the middle of the drain pipe to facilitate the discharge of water inside the dehumidification box 12. The dehumidification box 12 is connected to the air inlet of the fan 7 through a pipe. The end of the dehumidification box 12 away from the fan 7 is connected to the inside of the drying cylinder 1 through an exhaust pipe 11. Multiple partition plates 13 are fixed inside the dehumidification box 12. A heat exchange tube 14 is installed between two connected partition plates 13. Both ends of the heat exchange tube 14 are equipped with diverter pipes 18. A sealing cover plate 17 is fixed to the top of the dehumidification box 12 and is fixed to the heat exchange tube 14.

[0032] It should be noted that in this embodiment, one of the branch pipes 18 is connected to the cold water pipe, and the other branch pipe 18 is connected to the circulating water tank through a pipe. During the operation of the fan 7, the fan 7 introduces the air inside the drying cylinder 1 into the dehumidification box 12 through the exhaust pipe 11. The partition plate 13 divides the inside of the dehumidification box 12 into an S-shaped path. The hot air is connected to the copper heat exchange tube 14 during its travel along the S-shaped path. The water temperature inside the heat exchange tube 14 is lower than the temperature of the hot air. Under the action of liquefaction, the water in the hot air is compressed and drips down along the heat exchange tube 14, thereby dehumidifying the hot air. The dehumidified hot air is reheated by the heating pipe 8 and enters the drying cylinder 1 again.

[0033] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first," "second," "third," and "fourth" 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," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying apparatus for modified plastic granules, characterized in that: include: A conical drying cylinder (1) has a conveying pipe (3) fixedly connected to the middle of the drying cylinder (1). The conveying pipe (3) is rotatably connected to a spiral conveying rod (5) for conveying and throwing materials out of the conveying pipe (3). Multiple air inlet holes (4) are equidistantly opened on the outer side of the conveying pipe (3). A circulating material pipe (15) for circulating materials is provided on one side of the drying cylinder (1). The heating section is located at the bottom of the drying cylinder (1). The heating section includes a fan (7) fixedly connected to the bottom of the drying cylinder (1). The output end of the fan (7) is equipped with a heating pipe (8) for heating air. The top of the heating pipe (8) is fixedly connected to a hot air pipe (10). The air outlet direction of the hot air pipe (10) is downward conveying pipe (3). The dehumidification section is located on one side of the fan (7) and is used to circulate and dehumidify the hot air inside the drying cylinder (1).

2. The drying apparatus for modified plastic granules according to claim 1, characterized in that: A feed inlet is provided on one side of the bottom of the conveying pipe (3), and a feed funnel (2) is fixedly connected to the bottom of the conveying pipe (3) on the side of the feed inlet.

3. The drying apparatus for modified plastic granules according to claim 1, characterized in that: The circulating material pipe (15) is located above the feeding funnel (2), and a discharge pipe (16) is fixedly connected to one side of the bottom of the drying cylinder (1). Both the circulating material pipe (15) and the discharge pipe (16) are equipped with gate valves in the middle.

4. The drying apparatus for modified plastic granules according to claim 1, characterized in that: The bottom of the conveying pipe (3) is equipped with a motor (6) that drives the spiral conveying rod (5). The length of the spiral conveying rod (5) is greater than the length of the conveying pipe (3), and the top of the spiral conveying rod (5) is rotatably connected to the top of the drying cylinder (1).

5. The drying apparatus for modified plastic granules according to claim 1, characterized in that: The output end of the fan (7) is connected to the heating tube (8) through a Y-shaped pipe, and an electric heating wire (9) is fixed inside the heating tube (8).

6. The drying apparatus for modified plastic granules according to claim 1, characterized in that: The dehumidification unit includes a dehumidification box (12) fixed to the bottom of the drying cylinder (1). The dehumidification box (12) is connected to the air inlet of the fan (7) through a pipe. The end of the dehumidification box (12) away from the fan (7) is connected to the inside of the drying cylinder (1) through an exhaust pipe (11).

7. The drying apparatus for modified plastic granules according to claim 6, characterized in that: The dehumidification box (12) has multiple partition plates (13) fixedly connected inside. A heat exchange tube (14) is installed between two connected partition plates (13). A diversion pipe (18) is installed at both ends of the heat exchange tube (14). A sealing cover plate (17) is fixedly connected to the top of the dehumidification box (12). The sealing cover plate (17) is fixedly connected to the heat exchange tube (14).

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