Reaction kettle for expandable polystyrene

Abstract

The utility model relates to the technical field of reaction kettles, and discloses a reaction kettle for expandable polystyrene, which comprises a reaction barrel, a heating outer cylinder and a sealing cover, the left side of the outer wall of the heating outer cylinder is communicated with an air inlet pipe, the right end of the air inlet pipe penetrates through the outer wall of the heating outer cylinder and is communicated with a cooling pipe, and the outer wall of the air inlet pipe is provided with an electromagnetic valve; the other end of the cooling pipe penetrates through the inner side of the heating outer cylinder and communicates with a connecting pipe, the other end of the connecting pipe communicates with a two-way valve seat, a first temperature sensor is installed on the outer wall of the connecting pipe, an instrument panel is installed on the top of the outer wall of the first temperature sensor, and the other end of the two-way valve seat communicates with a fan. According to the reaction device disclosed by the utility model, internal heat is cooled through external cold air, the absorbed heat is stored through an ethylene glycol aqueous solution in the temperature storage box, and the temperature in the reaction barrel is regulated and controlled, so that heat loss is avoided, and energy utilization is improved.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a reaction vessel for expandable polystyrene. Background Technology

[0002] In the plastics manufacturing industry, expandable polystyrene (EPS) is an important polymer material widely used in packaging, building insulation, and daily necessities. With the continuous growth of demand for EPS from various industries, the requirements for its production efficiency and quality are becoming increasingly stringent. As the core equipment for EPS production, the performance of the reactor directly affects the overall efficiency of EPS production.

[0003] Expandable polystyrene is prepared by reacting styrene monomers in a high-pressure reactor in a single operation. During the reaction, the raw materials need to be heated to ensure reaction efficiency. Traditional jacketed heat exchange methods have limited heat exchange area and suffer from uneven temperature distribution, failing to meet the requirements for rapid heating and cooling, thus affecting the reaction process. Existing solutions involve coiling semi-tubes around the outside of the reactor body, with multiple sets of semi-tubes operating simultaneously to quickly and effectively control the internal temperature of the reactor body. Regulating valves are installed on the cooling water inlet and steam inlet pipes, and a PLC controller precisely controls the process based on temperature sensor signals. However, cooling the reactor leads to heat loss, resulting in energy waste and increased production costs. Therefore, a new reactor for expandable polystyrene is proposed to address these issues. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a reaction vessel for expandable polystyrene, which aims to improve the problem of heat loss and energy waste that occurs when cooling the heat in the reaction vessel in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a reaction vessel for expandable polystyrene, comprising a reaction tank, a heating outer cylinder, and a sealing cover. An air inlet pipe is connected to the left side of the outer wall of the heating outer cylinder. The right end of the air inlet pipe penetrates the outer wall of the heating outer cylinder and is connected to a cooling pipe. A solenoid valve is installed on the outer wall of the air inlet pipe. The other end of the cooling pipe penetrates the inner side of the heating outer cylinder and is connected to a connecting pipe. The other end of the connecting pipe is connected to a two-way valve seat. A temperature sensor is installed on the outer wall of the connecting pipe. An instrument panel is installed on the top of the outer wall of the temperature sensor. The other end of the two-way valve seat is connected to a fan. A temperature storage tank is connected to the right side of the fan. A high-pressure exhaust port is connected to the top of the temperature storage tank. A heater is fixedly connected to the left side of the outer wall of the heating outer cylinder. The output end of the heater penetrates the outer wall of the heating outer cylinder and is fixedly connected to a heating wire. A cleaning mechanism is provided inside the reaction tank for scraping off material from the inner wall of the reaction tank.

[0006] As a further description of the above technical solution:

[0007] The cleaning mechanism includes a servo motor, the bottom of which is fixedly connected to the top of the sealing cover. The output end of the servo motor passes through the top of the sealing cover and is fixedly connected to a stirring rod. The outer wall of the stirring rod is connected to a connecting cylinder. The left and right ends of the connecting cylinder are slidably connected to telescopic rods. The far ends of the two telescopic rods are fixedly connected to scrapers. The outer wall of the telescopic rod is fixedly connected to a limit plate and a spring.

[0008] As a further description of the above technical solution:

[0009] The top front side of the sealing cover is connected to a manhole cover, and an observation mirror is fixedly connected to the top of the manhole cover.

[0010] As a further description of the above technical solution:

[0011] A second temperature sensor is fixedly connected to the top left side of the sealing cover, and a monitoring instrument is fixedly connected to the top right side of the sealing cover.

[0012] As a further description of the above technical solution:

[0013] The outer wall of the reaction vessel is connected to a gas phase outlet on the left side, and the left end of the gas phase outlet is connected to a gas phase pipe.

[0014] As a further description of the above technical solution:

[0015] The front side of the outer wall of the reaction vessel is connected to a material inlet, and the bottom of the reaction vessel is connected to a material outlet.

[0016] As a further description of the above technical solution:

[0017] Each of the outer walls of the heating outer cylinder is fixedly connected to a support frame, and the bottom ends of the multiple support frames are fixedly connected to rubber pads.

[0018] As a further description of the above technical solution:

[0019] The top of the sealing cover is fixedly connected with lifting rings around all four sides, and the outer wall of the sealing cover is fixedly connected with buckles around all four sides.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, when the internal temperature is too high and needs to be regulated, the air inlet pipe is opened by controlling the solenoid valve, and the fan is started to guide the outside air in. The outside cold air cools the internal heat. The absorbed heat is stored in the ethylene glycol aqueous solution inside the temperature storage tank. When the temperature of the absorbed air decreases, the two-way valve seat will close the pipe of the temperature storage tank and discharge the cold air through another port, thereby regulating the temperature inside the reaction tank, avoiding heat loss and improving energy utilization.

[0022] 2. In this utility model, the telescopic rod slides in the connecting cylinder through the limiting plate, and with the spring on the outside of the telescopic rod, the telescopic rod can be unfolded to meet the requirements of precise fitting of the inner diameter of reaction tanks of different sizes. The stirring rod is driven by the start of the servo motor to fully stir the liquid inside the reaction tank, and the material on the inner wall is scraped off by the scrapers on both sides to prevent the material from adhering to the inner wall of the reaction tank and causing subsequent cleaning difficulties. Attached Figure Description

[0023] Figure 1 This is a perspective view of a reaction vessel for expandable polystyrene proposed in this utility model;

[0024] Figure 2 This is a front view of a reaction vessel for expandable polystyrene proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the cooling pipe structure of a reaction vessel for expandable polystyrene proposed in this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the stirring rod of the expandable polystyrene reaction vessel proposed in this utility model;

[0027] Figure 5 This is a cross-sectional view of the connecting cylinder of an expandable polystyrene reactor proposed in this utility model.

[0028] Legend:

[0029] 1. Reaction tank; 2. Cleaning mechanism; 201. Servo motor; 202. Stirring rod; 203. Connecting cylinder; 204. Telescopic rod; 205. Scraper; 206. Limiting plate; 207. Spring; 3. Sealing cover; 4. Heating outer cylinder; 5. Air inlet pipe; 6. Solenoid valve; 7. Cooling pipe; 8. Connecting pipe; 9. Two-way valve seat; 10. Temperature sensor one; 11. Instrument panel; 12. Fan; 13. Temperature storage tank; 14. High-pressure exhaust port; 15. Heater; 16. Heating wire; 17. Manhole cover; 18. Observation mirror; 19. Temperature sensor two; 20. Monitoring instrument; 21. Gas phase outlet; 22. Gas phase pipe; 23. Material inlet; 24. Material outlet; 25. Support frame; 26. Rubber pad; 27. Lifting ring; 28. Buckle. Detailed Implementation

[0030] 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.

[0031] Reference Figure 1 , Figure 2 and Figure 3This utility model provides an embodiment of a reaction vessel for expandable polystyrene, comprising a reaction tank 1, a heating outer cylinder 4, and a sealing cover 3. The heating outer cylinder 4 is integrally formed with the reaction tank 1. The heating outer cylinder 4 has an internal cavity. Due to the installation of heating and cooling components, an air inlet pipe 5 is connected to the left side of the outer wall of the heating outer cylinder 4. The right end of the air inlet pipe 5 penetrates the outer wall of the heating outer cylinder 4 and is connected to a cooling pipe 7. A solenoid valve 6 is installed on the outer wall of the air inlet pipe 5. The other end of the cooling pipe 7 penetrates the inner side of the heating outer cylinder 4 and is connected to a connecting pipe 8. The interior of the heating outer cylinder 4 is equipped with... Equipped with a cooling pipe 7, which is made of copper and has good heat dissipation, the cooling pipe 7 has two ends that pass through the inner wall of the heating outer cylinder 4 and are connected to the connecting pipe 8 and the air intake pipe 5. The air intake pipe 5 is opened by controlling the solenoid valve 6, thereby guiding outside air in and cooling the internal heat. The other end of the connecting pipe 8 is connected to a two-way valve seat 9. A temperature sensor 10 is installed on the outer wall of the connecting pipe 8, and an instrument panel 11 is installed on the top of the outer wall of the temperature sensor 10. The two-way valve seat 9... The other end is connected to a fan 12, and the right side of the fan 12 is connected to a temperature storage tank 13. A connecting pipe 8 is connected to a two-way valve seat 9. The two-way valve seat 9 can transfer the absorbed heat into the temperature storage tank 13, where the heat is stored in an ethylene glycol aqueous solution. During continuous air intake, a temperature sensor 10 on the outer wall of the connecting pipe 8 can monitor the temperature. When the absorbed air temperature decreases, the two-way valve seat 9 will close the pipe of the temperature storage tank 13 and discharge the cold air through another port. The temperature inside the reaction tank 1 is now regulated to avoid heat loss and improve energy utilization. The top of the temperature storage tank 13 is connected to a high-pressure exhaust port 14. A heater 15 is fixedly connected to the left side of the outer wall of the heating outer cylinder 4. The output end of the heater 15 passes through the outer wall of the heating outer cylinder 4 and is fixedly connected to a heating wire 16. A cleaning mechanism 2 is provided inside the reaction tank 1. The cleaning mechanism 2 is used to scrape off the material on the inner wall of the reaction tank 1. A material inlet 23 is connected to the front side of the outer wall of the reaction tank 1. A material outlet 24 is connected to the bottom of the reaction tank 1.

[0032] Specifically, the heating outer cylinder 4 and the reaction vessel 1 are integrally formed. The heating outer cylinder 4 has an internal cavity to facilitate the installation of heating and cooling components. A cooling pipe 7 is installed inside the heating outer cylinder 4. The cooling pipe 7 is made of copper and has good heat dissipation. At the same time, both ends of the cooling pipe 7 pass through the inner wall of the heating outer cylinder 4 and are connected to the connecting pipe 8 and the air inlet pipe 5. By controlling the solenoid valve 6 to open the air inlet pipe 5, external air is guided in, and the internal heat is cooled by the external cold air. The connecting pipe 8 is connected to the two-way valve seat 9, which can transfer the absorbed heat into the temperature storage tank 13. The heat is stored in the ethylene glycol aqueous solution inside the temperature storage tank 13. During the continuous air intake process, the outer wall of the connecting pipe 8... Temperature sensor 10 can monitor the temperature; when the temperature of the absorbed air decreases, the two-way valve seat 9 will close the pipe of the temperature storage tank 13 and discharge the cold air through another port, thereby regulating the temperature inside the reaction vessel 1, avoiding heat loss and improving energy utilization. The top of the temperature storage tank 13 is connected to a high-pressure exhaust port 14 for releasing pressure when needed. A heater 15 is fixed on the left side of the outer wall of the heating outer cylinder 4. The output end of the heater 15 passes through the outer wall of the heating outer cylinder 4 and is fixed with a heating wire 16 for heating the inside of the reaction vessel. The front side of the outer wall of the reaction vessel 1 is connected to a material inlet 23 for easy material addition. The bottom of the reaction vessel 1 is connected to a material outlet 24 for easy material discharge after the reaction is completed.

[0033] Reference Figure 1 , Figure 4 and Figure 5 The cleaning mechanism 2 includes a servo motor 201. The bottom of the servo motor 201 is fixedly connected to the top of the sealing cover 3. The servo motor 201 provides a stable and secure support platform through the sealing cover 3. The output end of the servo motor 201 passes through the top of the sealing cover 3 and is fixedly connected to a stirring rod 202. The outer wall of the stirring rod 202 is connected to a connecting cylinder 203. The stirring rod 202 and the connecting cylinder 203 are integrally formed. The left and right ends of the connecting cylinder 203 are slidably connected to telescopic rods 204. The far ends of the two telescopic rods 204 are fixedly connected to scrapers 205. The outer walls of the telescopic rods 204 are fixedly connected to... With the limit plate 206 connected, the telescopic rod 204 slides within the connecting cylinder 203, thus ensuring precise fit to the inner diameter of reaction tanks 1 of different sizes. A spring 207 is fixedly connected to the outer wall of the telescopic rod 204, and in conjunction with the spring 207 on the outer side of the telescopic rod 204, the telescopic rod 204 can be extended. By starting the servo motor 201, the stirring rod 202 is driven to fully stir the liquid inside the reaction tank 1, and the scrapers 205 on both sides scrape off the material on the inner wall to prevent the material from adhering to the inner wall of the reaction tank 1 and causing subsequent cleaning difficulties.

[0034] Specifically, the servo motor 201 is fixed at the top of the sealing cover 3, providing a stable and robust support platform. The output end of the servo motor 201 penetrates the top of the sealing cover 3 and is fixedly connected to the stirring rod 202. The outer wall of the stirring rod 202 is connected to the connecting cylinder 203. These two parts are manufactured in one piece, ensuring structural integrity and strength. The connecting cylinder 203 has slidingly connected telescopic rods 204 at both ends. Scrapers 205 are fixed to the sides of the telescopic rods 204 away from each other. The limiting plate 206, together with the telescopic rods 204, limits the movement of the sliding rods 204. The sliding mechanism moves within the connecting cylinder 203, achieving precise fitting to the inner diameter of reaction tanks 1 of different sizes. Furthermore, a spring 207 is fixedly installed on the outer wall of the telescopic rod 204. The spring 207 cooperates with the spring 207 on the outer side of the telescopic rod 204 to facilitate the extension of the telescopic rod 204. By activating the servo motor 201, the stirring rod 202 can be driven to thoroughly stir the liquid inside the reaction tank 1. Simultaneously, the scrapers 205 on both sides can effectively scrape away material from the inner wall of the reaction tank 1, preventing material from adhering to the inner wall and thus avoiding the difficulty of subsequent cleaning.

[0035] Reference Figure 1 and Figure 2 The top front side of the sealing cover 3 is connected to a manhole cover plate 17. An observation mirror 18 is fixedly connected to the top of the manhole cover plate 17. The internal reaction can be monitored in real time through the observation mirror 18. A temperature sensor 29 is fixedly connected to the top left side of the sealing cover 3. A monitoring instrument 20 is fixedly connected to the top right side of the sealing cover 3. The monitoring instrument 20 and the temperature sensor 29 can detect the internal reaction state. A gas phase outlet 21 is connected to the left side of the outer wall of the reaction tank 1. A gas phase pipe 22 is connected to the left end of the gas phase outlet 21. A support frame 25 is fixedly connected to the outer wall of the heating outer cylinder 4. Rubber pads 26 are fixedly connected to the bottom of the multiple support frames 25. A lifting ring 27 is fixedly connected to the top of the sealing cover 3. A buckle 28 is fixedly connected to the outer wall of the sealing cover 3.

[0036] Specifically, a manhole cover 17 is provided on the top front side of the sealing cover 3. An observation mirror 18 is fixed on the top of the manhole cover 17, through which the operator can monitor the reaction inside the reactor in real time. In addition, a temperature sensor 29 is fixed on the top left side of the sealing cover 3, and a monitoring instrument 20 is fixed on its top right side. These two devices, namely the temperature sensor 29 and the monitoring instrument 20, work together to accurately detect and monitor the reaction state inside the reactor. A gas phase outlet 21 is provided on the left side of the outer wall of the reaction tank 1, and its left end is connected to the gas phase pipe 22 to guide the gaseous products generated by the reaction to be discharged. Multiple support frames 25 are evenly arranged and fixed on the outer wall of the heating outer cylinder 4. Rubber pads 26 are fixed at the bottom of these support frames 25 to provide additional stability and shock absorption. Lifting rings 27 are fixed around the top of the sealing cover 3 for easy handling and hoisting.

[0037] Working principle: First, the heater 15 is turned on and the heating wire 16 is used to heat the inside of the reaction tank 1. When the internal temperature is too high and needs to be adjusted, the solenoid valve 6 is controlled to open the air inlet pipe 5 and the fan 12 is started to guide the outside air in. The outside cold air cools the internal heat. The two-way valve seat 9 transfers the absorbed heat into the temperature storage tank 13. The heat is stored in the ethylene glycol aqueous solution inside the temperature storage tank 13. During the continuous air intake process, the temperature sensor 10 on the outer wall of the connecting pipe 8 can monitor the temperature. When the temperature of the absorbed air decreases, the two-way valve seat 9 will close the pipe of the temperature storage tank 13 and discharge the cold air through another port.

[0038] Furthermore, the stirring rod 202 and the connecting cylinder 203 are integrally formed, and the telescopic rod 204 is limited and slidable in the connecting cylinder 203 by the limiting plate 206. This can meet the requirement of precise fitting of the inner diameter of the reaction tank 1 of different sizes. With the help of the spring 207 on the outside of the telescopic rod 204, the telescopic rod 204 can be unfolded. By starting the servo motor 201, the stirring rod 202 is driven to fully stir the liquid inside the reaction tank 1, and the material on the inner wall is scraped off by the scrapers 205 on both sides.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reaction kettle for expandable polystyrene, comprising a reaction barrel (1), a heating outer cylinder (4) and a sealing cover (3), characterized in that: The outer wall left side of the heating outer cylinder (4) is communicated with an air inlet pipe (5), the right end of the air inlet pipe (5) penetrates the outer wall of the heating outer cylinder (4) and is communicated with a cooling pipe (7), the outer wall of the air inlet pipe (5) is provided with a solenoid valve (6), the other end of the cooling pipe (7) penetrates the inner side of the heating outer cylinder (4) and is communicated with a connecting pipe (8), the other end of the connecting pipe (8) is communicated with a two-way valve seat (9), the outer wall of the connecting pipe (8) is provided with a temperature sensor one (10), the top of the temperature sensor one (10) is provided with an instrument panel (11), the other end of the two-way valve seat (9) is communicated with a fan (12), the right side of the fan (12) is communicated with a temperature storage tank (13), the top of the temperature storage tank (13) is communicated with a high-pressure exhaust hole (14), the outer wall left side of the heating outer cylinder (4) is fixedly connected with a heater (15), the output end of the heater (15) penetrates the outer wall of the heating outer cylinder (4) and is fixedly connected with a heating wire (16), the inner side of the reaction bucket (1) is provided with a cleaning mechanism (2), the cleaning mechanism (2) is used for scraping the material on the inner wall of the reaction bucket (1).

2. An expandable polystyrene reactor as claimed in claim 1, wherein: The cleaning mechanism (2) comprises a servo motor (201), the bottom of the servo motor (201) is fixedly connected to the top of the sealing cover (3), the output end of the servo motor (201) penetrates the top of the sealing cover (3) and is fixedly connected with a stirring rod (202), the outer wall of the stirring rod (202) is communicated with a connecting cylinder (203), the left and right ends of the connecting cylinder (203) are slidably connected with telescopic rods (204), the distal ends of the two telescopic rods (204) are fixedly connected with scrapers (205), the outer wall of the telescopic rod (204) is fixedly connected with a limiting plate (206), and the outer wall of the telescopic rod (204) is fixedly connected with a spring (207).

3. The reactor for expandable polystyrene according to claim 1, characterized in that: The top front side of the sealing cover (3) is communicated with a manhole cover plate (17), and the top of the manhole cover plate (17) is fixedly connected with an observation sight glass (18).

4. An expandable polystyrene reactor as claimed in claim 1, wherein: The top left side of the sealing cover (3) is fixedly connected with a temperature sensor two (19), and the top right side of the sealing cover (3) is fixedly connected with a monitoring instrument (20).

5. An expandable polystyrene reactor as claimed in claim 1, wherein: The left side of the outer wall of the reaction bucket (1) is communicated with a gas phase discharge port (21), and the left end of the gas phase discharge port (21) is communicated with a gas phase pipe (22).

6. An expandable polystyrene reactor as claimed in claim 1, wherein: The front side of the outer wall of the reaction bucket (1) is communicated with a material feeding port (23), and the bottom of the reaction bucket (1) is communicated with a material discharge port (24).

7. An expandable polystyrene reactor according to claim 1, characterized in that: The outer wall of the heating outer cylinder (4) is provided with a support frame (25), and the bottom end of the support frame (25) is fixedly connected with a rubber pad (26).

8. An expandable polystyrene reactor according to claim 1, characterized in that: The top of the sealing cover (3) is fixedly connected with a lifting ring (27) around, and the outer wall of the sealing cover (3) is fixedly connected with a buckle (28) around.

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