A drying equipment for producing flame-retardant polystyrene

Abstract

The utility model relates to polystyrene production technical field especially discloses a kind of drying equipment for flame-retardant polystyrene production, including support, two groups of fixed parts are fixed symmetrically on support, fixed column is fixed on each group of fixed part, two fixed columns are commonly supported with drying cylinder, coaxially setting inner tube is provided in drying cylinder, at least two groups of heat conduction fins are fixedly connected symmetrically between inner tube and drying cylinder, hot air blower is also fixedly installed on support, the air outlet of hot air blower is towards the inside of inner tube, hot air is blown into inner tube by hot air blower, hot air directly heats inner tube, the heat of inner tube is conducted to drying cylinder by heat conduction fin, drying cylinder is synchronously heated, form the inner and outer double-layer heating structure of inner tube and drying cylinder, the equipment by the inner and outer double-layer heating structure of inner tube and drying cylinder, flame-retardant polystyrene particles are contacted with inner tube heated directly and drying cylinder heated by heat conduction fin simultaneously, significantly increase the contact area of particle and heat source, substantially improve drying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of polystyrene production technology, and in particular to a drying device for the production of flame-retardant polystyrene. Background Technology

[0002] In the preparation of polystyrene granules, the plasticized raw materials need to be added to a screw extruder for extrusion granulation. The extruded polystyrene granules need to be immersed in water for rapid cooling and shaping. Then, the shaped polystyrene granules are dried. The dried polystyrene granules are transported to a storage tank by a conveyor for storage.

[0003] When drying polystyrene granules, most existing dryers can only heat one side, resulting in only one side of the polystyrene granules being in contact with the heat source against the cylinder wall, while the other side is left unheated, resulting in low drying efficiency. Furthermore, during drying, the polystyrene granules tend to accumulate at the bottom of the cylinder due to gravity, which may cause the outer layer to dry while the inner layer remains undried, leading to uneven drying. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a drying device for the production of flame-retardant polystyrene. It solves the technical problems of low efficiency and uneven drying when drying polystyrene particles in existing dryers. This is because the drying process is mostly done on one side, resulting in poor heat transfer and low efficiency. Furthermore, the particles tend to accumulate at the bottom of the drum due to gravity, causing uneven drying with the outer layer not being dried and the inner layer not being dried.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A drying device for flame-retardant polystyrene production includes a support frame, on which two sets of fixing members are symmetrically fixed. Each set of fixing members is fixed with a fixing column. The two fixing columns jointly support a drying cylinder. An inner cylinder is coaxially arranged inside the drying cylinder. At least two sets of heat-conducting plates are symmetrically fixedly connected between the inner cylinder and the drying cylinder. A hot air blower is also fixedly installed on the support frame, with the air outlet of the hot air blower facing the inside of the inner cylinder.

[0007] Hot air is blown into the inner cylinder by the hot air blower, and the hot air directly heats the inner cylinder. The heat from the inner cylinder is conducted to the drying cylinder through the heat conduction plate, so that the drying cylinder heats up at the same time, forming a double-layer heating structure of the inner cylinder and the drying cylinder. The flame-retardant polystyrene particles put into the drying cylinder are dried by the double-layer heating, so as to achieve a double-layer drying effect.

[0008] Preferably, two sets of first transmission wheels are installed at equal intervals along the length direction on each of the two fixed columns. The four sets of first transmission wheels are divided into front and rear support units. The front support unit and the rear support unit respectively support the two ends of the drying cylinder. The support stability of the drying cylinder in the double-layer drying process is enhanced by multiple sets of first transmission wheels.

[0009] Preferably, the drying cylinder has a feeding port on its side wall that communicates with the interior. The inner wall of the feeding port is symmetrically fixed with screws, and each screw is threaded with a threaded ring. A sealing strip is also inserted into the feeding port. After the particles are put in, the threaded ring is rotated to make the end press against the sealing strip to seal the feeding port and prevent hot air leakage during double-layer drying.

[0010] Preferably, a central shaft extending into the inner wall of the drying cylinder is fixed at the center. Multiple fan blades are equidistantly mounted on the central shaft along its length. The hot air blown out by the hot air blower drives the fan blades to rotate around the central shaft, spreading the hot air evenly to all parts of the inner cylinder, ensuring uniform heating of the inner cylinder and improving the uniformity of double-layer drying.

[0011] Preferably, multiple baffles are fixed at equal intervals along the circumferential and length directions on the outer wall of the inner cylinder, and a connecting groove is opened at one end of each baffle near the inner wall of the drying cylinder; during double-layer drying, the particles roll along the inner wall of the drying cylinder, the stacked particles are intercepted by the baffles, and individual particles move through the connecting groove, so as to avoid accumulation and affect the drying effect.

[0012] Preferably, a drive motor is fixedly mounted on the bracket, and a second transmission wheel is fixed on the output shaft of the drive motor. A transmission belt is sleeved between the second transmission wheel and one of the first transmission wheels. When the drive motor is started, the first transmission wheel is driven to rotate through the second transmission wheel and the transmission belt, providing rotational power to the drying cylinder.

[0013] Preferably, the two sets of first drive wheels located in the middle are both roller structures, and the two ends of the drying cylinder are respectively placed on the top of the two sets of roller structures; when the first drive wheel rotates, the drying cylinder is driven to rotate around the axis by the friction between the roller and the drying cylinder, so that the particles are in full contact with the inner wall and the outer wall of the inner cylinder, thereby enhancing the double-layer drying effect.

[0014] Preferably, the air outlet of the hot air blower is connected to an air guide duct, the end of the air guide duct away from the hot air blower extends to the end of the drying cylinder and communicates with the inside of the inner cylinder, and the outlet of the air guide duct is directly opposite the middle area of ​​the central axis, ensuring that the hot air is accurately applied to the fan blades.

[0015] Preferably, a connecting plate is fixed to the end of the drying cylinder away from the air guide duct, and an air outlet is fixed to the connecting plate.

[0016] Preferably, a feeding tray is installed in the middle of the support, located below the drying cylinder, and a control panel for controlling the hot air blower and drive motor is installed on the side wall of the support.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The double-layer heating structure of the inner and outer cylinders allows the flame-retardant polystyrene particles to simultaneously contact the directly heated inner cylinder and the drying cylinder heated by heat conduction through heat-conducting plates. This significantly increases the contact area between the particles and the heat source, greatly improving drying efficiency. Furthermore, the heat is evenly conducted through the heat-conducting plates, and the stable heat source, combined with the hot air blower supplying air to the inner cylinder, effectively avoids problems such as insufficient drying or overheating of the particles in certain areas. The core achievement is to achieve a highly efficient and uniform double-layer drying effect for the particles, ensuring the moisture-proof performance and quality stability of the dried particles. Attached Figure Description

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is an exploded structural diagram of the drying cylinder connection of this utility model;

[0022] Figure 3 This is an exploded view of the sealing strip connection of this utility model;

[0023] Figure 4 This is an exploded view of the heat-conducting sheet connection of this utility model;

[0024] Figure 5 This is an exploded view of the fan blade connection structure of this utility model;

[0025] Figure 6 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0026] Legend: 1. Bracket; 2. Fixing component; 3. Fixing column; 4. First transmission wheel; 5. Drive motor; 6. Second transmission wheel; 7. Transmission belt; 8. Feeding tray; 9. Control panel; 10. Drying cylinder; 11. Feeding port; 12. Screw; 13. Threaded ring; 14. Sealing strip; 15. Central shaft; 16. Fan blade; 17. Connecting plate; 18. Air outlet; 19. Inner cylinder; 20. Baffle strip; 21. Connecting groove; 22. Heat-conducting plate; 23. Hot air blower. Detailed Implementation

[0027] This application provides a drying device for the production of flame-retardant polystyrene, which effectively solves the problems of low efficiency in existing dryers when drying polystyrene particles. These problems are caused by single-sided heating, resulting in particles only contacting the cylinder wall on one side, poor heat transfer, and particles tending to accumulate at the bottom of the cylinder due to gravity, leading to uneven drying where the outer layer is dried while the inner layer remains undried. This device uses a double-layer heating structure for the inner and drying cylinders, allowing the flame-retardant polystyrene particles to contact both the directly heated inner cylinder and the drying cylinder heated by heat conduction through heat-conducting plates. This significantly increases the contact area between the particles and the heat source, greatly improving drying efficiency.

[0028] Example

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the technical solution in this application embodiment effectively solves the technical problems of low efficiency and uneven drying when drying polystyrene particles in existing dryers. This is because most dryers use single-sided heating, resulting in particles only contacting the cylinder wall on one side, leading to poor heat transfer. Furthermore, the particles tend to accumulate at the bottom of the cylinder due to gravity, causing uneven drying with the outer layer not being dried and the inner layer remaining un-dried. The overall concept is as follows: A drying device for flame-retardant polystyrene production includes a support frame 1. Two sets of fixing members 2 are symmetrically fixed on the support frame 1. Each set of fixing members 2 has a fixing column 3 fixed on it. The two fixing columns 3 jointly support a drying cylinder 10, which is coaxially arranged inside the drying cylinder 10. There is an inner cylinder 19, and at least two sets of heat-conducting plates 22 are symmetrically fixedly connected between the inner cylinder 19 and the drying cylinder 10. A hot air blower 23 is also fixedly installed on the bracket 1. The air outlet of the hot air blower 23 faces the inside of the inner cylinder 19. Hot air is blown into the inner cylinder 19 through the hot air blower 23, and the hot air directly heats the inner cylinder 19. The heat of the inner cylinder 19 is conducted to the drying cylinder 10 through the heat-conducting plates 22, so that the drying cylinder 10 is heated synchronously, forming a double-layer heating structure of the inner cylinder 19 and the drying cylinder 10. The flame-retardant polystyrene particles put into the drying cylinder 10 are dried using the double-layer heating, so as to achieve a double-layer drying effect.

[0030] Two sets of first drive wheels 4 are installed at equal intervals along the length direction on each of the two fixed columns 3. The four sets of first drive wheels 4 are divided into front and rear support units. The front support unit and the rear support unit respectively support the two ends of the drying cylinder 10. The support stability of the drying cylinder 10 in the double-layer drying process is enhanced by multiple sets of first drive wheels 4.

[0031] The drying cylinder 10 has a feeding port 11 on its side wall that communicates with the interior. Screws 12 are symmetrically fixed on the inner wall of the feeding port 11. Each screw 12 is threaded with a threaded ring 13. A sealing strip 14 is also inserted into the feeding port 11. After the particles are put in, the threaded ring 13 is rotated to make the end press against the sealing strip 14 to seal the feeding port 11 and prevent hot air leakage during double-layer drying.

[0032] A central shaft 15 extending into the inner cylinder 19 is fixed at the center of the inner wall of the drying cylinder 10. Multiple fan blades 16 are equidistantly mounted on the central shaft 15 along its length. The hot air blown out by the hot air blower 23 drives the fan blades 16 to rotate around the central shaft 15, so as to evenly diffuse the hot air to all parts of the inner cylinder 19, ensuring that the inner cylinder 19 is heated evenly and improving the uniformity of double-layer drying.

[0033] Multiple baffles 20 are fixed at equal intervals along the circumferential and length directions on the outer wall of the inner cylinder 19. Each baffle 20 has a connecting groove 21 at one end near the inner wall of the drying cylinder 10. During double-layer drying, the particles roll along the inner wall of the drying cylinder 10. Stacked particles are intercepted by the baffles 20, and individual particles move through the connecting groove 21 to avoid accumulation and affect the drying effect.

[0034] A drive motor 5 is fixedly installed on the bracket 1. A second transmission wheel 6 is fixed on the output shaft of the drive motor 5. A transmission belt 7 is sleeved between the second transmission wheel 6 and one of the first transmission wheels 4. When the drive motor 5 is started, the first transmission wheel 4 is driven to rotate through the second transmission wheel 6 and the transmission belt 7, providing rotational power to the drying cylinder 10.

[0035] The two sets of first drive wheels 4 located in the middle are both roller structures, and the two ends of the drying cylinder 10 are respectively placed on the top of the two sets of roller structures. When the first drive wheel 4 rotates, the drying cylinder 10 is driven to rotate around the axis by the friction between the roller and the drying cylinder 10, so that the particles are in full contact with the inner wall of the drying cylinder 10 and the outer wall of the inner cylinder 19, thereby enhancing the double-layer drying effect.

[0036] The outlet of the hot air blower 23 is connected to an air guide duct. The end of the air guide duct away from the hot air blower 23 extends to the end of the drying cylinder 10 and communicates with the interior of the inner cylinder 19. The outlet of the air guide duct is directly opposite the central area of ​​the central axis 15, ensuring that the hot air is precisely applied to the fan blades 16. A connecting plate 17 is fixed to the end of the drying cylinder 10 away from the air guide duct, and an air outlet 18 is fixed to the connecting plate 17. A feeding tray 8 located below the drying cylinder 10 is installed in the middle of the support 1. A control panel 9 for controlling the hot air blower 23 and the drive motor 5 is installed on the side wall of the support 1. During use, flame-retardant polystyrene granules can be evenly fed into the drying cylinder 10 through the feeding port 11. Then, the sealing strip 14 can be installed in the feed port 11, and the threaded ring 13 can be rotated on the screw 12 to complete the fixing operation. The hot air blower 23 can be started, and hot air will be blown into the inner cylinder 19 under the action of the hot air blower 23. The hot air acts on the inner cylinder 19 to raise its temperature, and then the temperature will be conducted to the drying cylinder 10 through the two heat conduction plates 22, raising the temperature of the drying cylinder 10. The flame-retardant polystyrene particles are dried under the joint action of the inner cylinder 19 and the drying cylinder 10, forming a sandwich drying structure with simultaneous heating of the upper and lower layers. This design doubles the contact area between the flame-retardant polystyrene particles and the heat source, and improves the heat conduction efficiency.

[0037] The second step involves simultaneously starting the drive motor 5. Under the action of the drive motor 5, the second transmission wheel 6 will rotate, which in turn will drive the transmission belt 7. The transmission belt 7 will then drive the first transmission wheel 4 connected to it to rotate on the fixed column 3. The first transmission wheel 4 connected to the transmission belt 7 will drive the other first transmission wheels 4 to rotate, which will in turn drive the drying cylinder 10 to rotate. Under the action of gravity, the flame-retardant polystyrene particles will roll along the inner wall of the drying cylinder 10. When the flame-retardant polystyrene particles come into contact with the baffle 20, only flame-retardant polystyrene particles that have not been stacked can pass through the baffle 20. Stacked flame-retardant polystyrene particles will be intercepted by the baffle 20 and will later roll to the bottom of the drying cylinder 10. This allows the equipment to spread the flame-retardant polystyrene particles evenly during use, effectively preventing the problem of accumulation during the drying process.

[0038] To address the problems existing in the prior art, this utility model provides a drying device for the production of flame-retardant polystyrene. This device uses a double-layer heating structure of inner and outer cylinders and drying cylinders to allow flame-retardant polystyrene particles to simultaneously contact the directly heated inner cylinder and the drying cylinder heated by heat conduction through heat-conducting plates, significantly increasing the contact area between the particles and the heat source and greatly improving the drying efficiency.

[0039] Working principle:

[0040] First, during use, flame-retardant polystyrene granules can be evenly fed into the drying cylinder 10 through the feeding port 11. Then, the sealing strip 14 can be installed in the feeding port 11, and the threaded ring 13 on the screw 12 can be rotated to fix it. The hot air blower 23 can be started, and hot air will be blown into the inner cylinder 19 under the action of the hot air blower 23. The hot air acts on the inner cylinder 19 to raise its temperature, and then the temperature will be conducted to the drying cylinder 10 through the two heat conduction plates 22, raising the temperature of the drying cylinder 10. The flame-retardant polystyrene granules are dried by the combined action of the inner cylinder 19 and the drying cylinder 10, forming a sandwich drying structure with simultaneous heating of the upper and lower layers. This design doubles the contact area between the flame-retardant polystyrene granules and the heat source, and improves the heat transfer efficiency.

[0041] The second step involves simultaneously starting the drive motor 5. Under the action of the drive motor 5, the second transmission wheel 6 will rotate, which in turn will drive the transmission belt 7. The transmission belt 7 will then drive the first transmission wheel 4 connected to it to rotate on the fixed column 3. The first transmission wheel 4 connected to the transmission belt 7 will drive the other first transmission wheels 4 to rotate, which will in turn drive the drying cylinder 10 to rotate. Under the action of gravity, the flame-retardant polystyrene particles will roll along the inner wall of the drying cylinder 10. When the flame-retardant polystyrene particles come into contact with the baffle 20, only flame-retardant polystyrene particles that have not been stacked can pass through the baffle 20. Stacked flame-retardant polystyrene particles will be intercepted by the baffle 20 and will later roll to the bottom of the drying cylinder 10. This allows the flame-retardant polystyrene particles to be laid flat during use, effectively preventing the problem of accumulation during the drying process.

[0042] Third, when the hot air enters the inner cylinder 19, it will act on the fan blades 16. At this time, the fan blades 16 will rotate on the central shaft 15. The rotation of the fan blades 16 will diffuse the hot air, further enhancing the drying effect of the equipment on the flame-retardant polystyrene particles.

[0043] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A drying device for flame-retardant polystyrene production, comprising a support frame (1), wherein two sets of fixing members (2) are symmetrically fixed on the support frame (1), and each set of fixing members (2) is fixed with a fixing column (3), and the two fixing columns (3) jointly support a drying cylinder (10), characterized in that, The drying cylinder (10) has an inner cylinder (19) coaxially arranged inside. At least two sets of heat-conducting plates (22) are symmetrically fixedly connected between the inner cylinder (19) and the drying cylinder (10). A hot air blower (23) is also fixedly installed on the bracket (1). The air outlet of the hot air blower (23) faces the inside of the inner cylinder (19). Hot air is blown into the inner cylinder (19) by the hot air blower (23), and the hot air directly heats the inner cylinder (19). The heat of the inner cylinder (19) is conducted to the drying cylinder (10) through the heat-conducting plate (22), so that the drying cylinder (10) heats up synchronously, forming a double-layer heating structure of the inner cylinder (19) and the drying cylinder (10). The flame-retardant polystyrene particles put into the drying cylinder (10) are dried by the double-layer heating.

2. The drying equipment for flame-retardant polystyrene production as described in claim 1, characterized in that, Two sets of first transmission wheels (4) are installed at equal intervals along the length direction on the two fixed columns (3). The four sets of first transmission wheels (4) are divided into front and rear support units, with the front support unit and the rear support unit respectively supporting the two ends of the drying cylinder (10).

3. The drying equipment for flame-retardant polystyrene production as described in claim 1, characterized in that, The drying cylinder (10) has a feeding port (11) that communicates with the interior on its side wall. The inner wall of the feeding port (11) is symmetrically fixed with screws (12). Each screw (12) is threaded with a threaded ring (13). A sealing strip (14) is also inserted into the feeding port (11).

4. The drying equipment for flame-retardant polystyrene production as described in claim 1, characterized in that, The drying cylinder (10) has a central shaft (15) fixed at the center of its inner wall, extending into the inner cylinder (19), and multiple fan blades (16) are rotatably mounted on the central shaft (15) at equal intervals along its length.

5. The drying equipment for flame-retardant polystyrene production as described in claim 1, characterized in that, Multiple baffles (20) are fixed at equal intervals along the circumferential and length directions on the outer wall of the inner cylinder (19), and each baffle (20) has a connecting groove (21) at one end near the inner wall of the drying cylinder (10).

6. The drying equipment for flame-retardant polystyrene production as described in claim 1, characterized in that, A drive motor (5) is fixedly installed on the bracket (1), and a second transmission wheel (6) is fixed on the output shaft of the drive motor (5). A transmission belt (7) is sleeved between the second transmission wheel (6) and one of the first transmission wheels (4).

7. The drying equipment for flame-retardant polystyrene production as described in claim 1, characterized in that, The two sets of first drive wheels (4) located in the middle are both roller structures, and the two ends of the drying cylinder (10) are respectively placed on the top of the two sets of roller structures.

8. The drying equipment for flame-retardant polystyrene production as described in claim 1, characterized in that, The air outlet of the hot air blower (23) is connected to an air guide pipe. The end of the air guide pipe away from the hot air blower (23) extends to the end of the drying cylinder (10) and communicates with the inside of the inner cylinder (19). The outlet of the air guide pipe is directly opposite the middle area of ​​the central axis (15) to ensure that the hot air is accurately applied to the fan blades (16).

9. The drying equipment for flame-retardant polystyrene production as described in claim 1, characterized in that, The drying cylinder (10) is fixed with a connecting plate (17) at the end away from the air duct, and an air outlet (18) is fixed on the connecting plate (17).

10. The drying equipment for flame-retardant polystyrene production as described in claim 1, characterized in that, The support (1) has a feeding tray (8) installed in the middle, located below the drying cylinder (10), and a control panel (9) for controlling the hot air blower (23) and the drive motor (5) is installed on the side wall of the support (1).

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