A high-efficiency heat dissipation energy-saving system for a polystyrene device

Abstract

The application discloses a kind of polystyrene device high-efficiency heat dissipation energy-saving system, belong to polymer production equipment technical field, the equipment is made of stainless steel material, with corrosion resistance, high temperature resistance, wear resistance and other characteristics, guarantee the service life and stability of equipment.In addition, two sets of equipment can be used interchangeably, facilitate the maintenance and replacement of equipment.The technology is mainly applied to polystyrene polymerization production, which can improve production efficiency, reduce production cost, improve product quality, and has good economic and social benefits.

Description

Technical Field

[0001] This invention relates to the field of polystyrene production equipment technology, specifically to a high-efficiency heat dissipation and energy-saving system for polystyrene plants. Background Technology

[0002] High levels of residual monomers in chemical polymers and insufficient heat dissipation have become major challenges in their application. To address these issues, governments and businesses are implementing a series of measures.

[0003] Chemical companies are also actively upgrading their equipment and conducting technological research to continuously improve product quality and reduce production costs. Therefore, chemical companies need to strengthen technological research and development, improve production efficiency, and reduce energy consumption. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-efficiency heat dissipation and energy-saving system for polystyrene production. This system solves the technical problems of excessive residual monomer levels and untimely heat dissipation in polymers produced by existing equipment. The technical solution adopted in this invention is as follows:

[0005] A high-efficiency heat dissipation and energy-saving system for polystyrene plants, characterized in that:

[0006] Vacuum condenser a is connected to vacuum pump a via a pipeline. Vacuum pump a is connected to liquid ring sealed liquid tank a via a pipeline. Liquid ring sealed liquid tank a is connected to cooler a via a pipeline. Cooler a is connected to vacuum pump a via a pipeline.

[0007] The polymerization reactor a is connected to the circulating liquid pump a via a pipeline. The circulating liquid pump a is connected to the circulating liquid intermediate tank a via a pipeline. The circulating liquid intermediate tank a is connected to the vacuum condenser b via a pipeline. The vacuum condenser b is connected to the second-stage Roots vacuum pump a via a pipeline. The second-stage Roots vacuum pump a is connected to the vacuum pump a.

[0008] Vacuum condenser b and vacuum condenser c are connected by a pipeline, and vacuum condenser c is connected to the first-stage devourer a.

[0009] The first-stage devolatilizer a is connected to the second-stage devolatilizer a via a pipeline. The second-stage devolatilizer a is connected to the second-stage decondenser a via a pipeline. The second-stage decondenser a is connected to the first-stage Roots vacuum pump a via a pipeline. The first-stage Roots vacuum pump a is connected to the pipeline between vacuum condenser b and vacuum condenser c via a pipeline.

[0010] The circulating liquid pump a is connected to the polymerization reactor a via a pipeline.

[0011] Vacuum pump a is connected to vacuum pump A via a pipeline;

[0012] Vacuum condenser A is connected to vacuum pump A via a pipeline. Vacuum pump A is connected to liquid ring sealed liquid tank a via a pipeline. Liquid ring sealed liquid tank a is connected to cooler A via a pipeline. Cooler A is connected to vacuum pump A via a pipeline. Vacuum pump A is connected to vacuum pump B via a pipeline.

[0013] The polymerization reactor A is connected to the circulating liquid pump A via a pipeline. The circulating liquid pump A is connected to the circulating liquid intermediate tank A via a pipeline. The circulating liquid intermediate tank A is connected to the vacuum condenser B via a pipeline. The vacuum condenser B is connected to the second-stage Roots vacuum pump A via a pipeline. The second-stage Roots vacuum pump A is connected to the vacuum pump A.

[0014] Vacuum condenser B and vacuum condenser C are connected by pipelines, and vacuum condenser C is connected to the first-stage devourer A.

[0015] The first-stage devolatilizer A is connected to the second-stage devolatilizer A via a pipeline. The second-stage devolatilizer A is connected to the second-stage decondenser A via a pipeline. The second-stage decondenser A is connected to the first-stage Roots vacuum pump A via a pipeline. The first-stage Roots vacuum pump A is connected to the pipeline between vacuum condenser B and vacuum condenser C via a pipeline.

[0016] The circulating liquid pump A is connected to the polymerization reactor A via a pipeline.

[0017] The radiator of this invention is made of a high thermal conductivity material, which can effectively improve heat dissipation efficiency and thus ensure the normal operation of the equipment. The liquid ring vacuum pump adopts variable frequency control technology, which enables the vacuum pump to automatically adjust its frequency according to the equipment's operating status to ensure a good vacuum effect. The coolant circulation system removes the heat generated by the equipment by continuously flowing coolant, thereby reducing the equipment temperature and preventing equipment damage or performance degradation due to overheating.

[0018] Optimized equipment structure: The polystyrene device of the present invention is optimized in structure, adopting a compact design to reduce the equipment footprint; the internal modular design facilitates maintenance and replacement of parts; the equipment is made of stainless steel to reduce coolant contamination and improve equipment operating efficiency and product quality.

[0019] The polystyrene apparatus of this invention employs an advanced control system. This system is highly flexible and adjusts the operating parameters of the vacuum system in real time according to the equipment's operating status to ensure that the equipment always operates in optimal condition. Simultaneously, this system also features remote fault diagnosis and remote equipment switching capabilities, significantly improving the safety and reliability of equipment operation.

[0020] It is worth mentioning that this device has a total of four production lines, each equipped with an independent vacuum system. Even if the vacuum system of one line fails, the temperature of the prepolymer reactor can be controlled by using the vacuum system of another production line through a special connecting pipeline, thereby ensuring the safe operation of the device and preventing the high-temperature material in the prepolymer reactor from overheating and exploding.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The polystyrene apparatus of this invention effectively solves the problems of excessive residual monomer levels and insufficient heat dissipation in existing technologies, improving equipment operating efficiency and product quality. Through the gradient operation of this "three-stage vacuum" system, the level of residual monomer can be effectively controlled, thereby ensuring high product quality and performance stability. Furthermore, this method reduces raw material consumption because more monomer can be recycled and reused instead of being discharged as waste. This not only helps reduce costs but also contributes to environmental protection, reducing pollution. In conclusion, by integrating an advanced vacuum system, manufacturers can improve product quality, expand its application range, and meet market demand for high-performance, environmentally friendly materials. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the working principle of the present invention;

[0024] Figure 2 This is a schematic diagram of the first-stage vacuum principle of the present invention;

[0025] Figure 3 This is a schematic diagram of the two-stage vacuum principle of the present invention;

[0026] Figure 4 This is a schematic diagram of the three-stage vacuum principle of the present invention;

[0027] Figure 5 It refers to the content of residual monomers when using traditional equipment;

[0028] Figure 6 It refers to the content of residual monomers after using the present invention. Detailed Implementation

[0029] Example 1

[0030] like Figure 1 As shown:

[0031] To optimize the production process: The polystyrene apparatus of the present invention optimizes the production process. In order to effectively control residual monomers, a multi-stage vacuum system can be used in the production process, the specific structure of which is as follows:

[0032] Primary vacuum: The main equipment includes a primary devolatilizer a1-10, a vacuum condenser c1-6, a primary Roots vacuum pump a1-14, a circulating liquid intermediate tank a1-7, a circulating liquid pump a1-9, a polymerization reactor a1-8, a liquid ring vacuum pump a1-3, a liquid ring sealed liquid tank a1-2, a vacuum condenser b1-5, and a cooler a1-4. After the polymerization reaction is completed, a primary vacuum is first used to remove most of the unreacted monomers and volatile substances. This step rapidly reduces the pressure in the system, thereby facilitating the evaporation of volatiles.

[0033] The working principle of the primary vacuum mainly involves the removal of volatiles. After the polymerization reaction is complete, the volatiles discharged from the top of the primary devolatilizer a1-10 are sent to the vacuum condenser c1-6 for condensation. During this process, the volatiles condense into devolatilization condensate at approximately 20-25°C, which is then pumped into the reactor a1-8 via circulating pump a1-9.

[0034] The uncondensed gas discharged from the vacuum condenser c1-6 will merge with the uncondensed gas from the secondary devolatilizer a1-11. These gases will then be sent to the vacuum condenser b1-5 for further processing to remove the remaining unreacted monomers and volatile substances. This step can rapidly reduce the pressure in the system, thereby facilitating the evaporation of volatiles.

[0035] Throughout the process, the Roots vacuum pump plays a crucial role. A Roots vacuum pump is a type of variable displacement vacuum pump containing two counter-rotating, synchronously rotating lobe-shaped rotors. The rotors are separated by small gaps, preventing direct contact between them and between the rotors and the pump casing wall. This design allows the Roots vacuum pump to operate at high pressures, thus achieving highly efficient removal of volatiles.

[0036] like Figure 2 As shown:

[0037] Secondary vacuum: The main equipment includes a secondary devolatilizer a1-11, a secondary decondenser a1-12, a secondary Roots vacuum pump a1-13, a vacuum condenser b1-5, a primary Roots vacuum pump a1-14, a circulating liquid intermediate tank a1-7, a circulating liquid pump a1-9, a polymerization reactor 1-8, a liquid ring vacuum pump a1-3, a liquid ring sealed liquid tank a1-2, and a cooler a1-4. Subsequently, a secondary vacuum is applied to further reduce the pressure and remove residual monomers and other volatile components. This step usually requires more meticulous control to ensure efficient removal of residues without compromising polymer quality.

[0038] Vacuum condenser b1-5 is cooled by chilled water at 5°C, condensing to obtain a devolatilization condensate at approximately 20-25°C. The condensate from vacuum condenser c1-6 and vacuum condenser b1-5 is discharged into the intermediate circulating liquid tank 1-7 after being sealed by a liquid seal. The uncondensed tail gas in vacuum condenser b1-5 is extracted by a first-stage Roots vacuum pump 1-14 and enters the liquid ring vacuum system together with the tail gas refluxed from the top of the polymerization reactor 1-8. The liquid ring vacuum system includes a liquid ring vacuum pump a1-3, a liquid ring sealed liquid tank a1-2, and a cooler a1-4. The liquid ring vacuum pump a1-3 is connected to the liquid ring sealed liquid tank a1-2 via a pipeline, the liquid ring sealed liquid tank a1-2 is connected to the cooler a1-4 via a pipeline, and the cooler a1-4 is connected to the liquid ring vacuum pump a1-3 via a pipeline.

[0039] The vacuum sealing fluid is cooled by the cooler a1-4 attached to the liquid ring vacuum pump a1-3, and the temperature of the circulating fluid is controlled at about 10°C to ensure that a good liquid ring vacuum (30-45 mmHg) is maintained. The liquid ring sealing fluid is discharged into the liquid ring sealing fluid tank 1-2 and then returned to the liquid ring pump.

[0040] like Figure 3 As shown:

[0041] Three-stage vacuum: Vacuum condenser a1-1 is connected to liquid ring vacuum pump a1-3 through a pipeline, liquid ring vacuum pump a1-3 is connected to liquid ring sealing liquid tank a1-2 through a pipeline, liquid ring sealing liquid tank a1-2 is connected to cooler a1-4 through a pipeline, and cooler a1-4 is connected to liquid ring vacuum pump a1-3 through a pipeline.

[0042] Liquid ring vacuum pump a1-3 is connected to liquid ring vacuum pump A2-3 via a pipeline;

[0043] Vacuum condenser A2-1 is connected to liquid ring vacuum pump A2-3 via a pipeline. Liquid ring vacuum pump A2-3 is connected to liquid ring sealing liquid tank a2-2 via a pipeline. Liquid ring sealing liquid tank a2-2 is connected to cooler A2-4 via a pipeline. Cooler A2-4 is connected to liquid ring vacuum pump A2-3 via a pipeline. Liquid ring vacuum pump A2-3 is connected to vacuum pump B2-3 via a pipeline.

[0044] Finally, a triple vacuum is used to ensure that any residual trace amounts of volatiles are removed from the polymer.

[0045] The working principle of the three-stage vacuum mainly involves the liquid ring sealing fluid being discharged into the liquid ring sealing fluid tank 1-2 and then returning to the liquid ring pump. Excess liquid ring fluid enters the waste liquid ring fluid collection tank and is pumped to the intermediate circulating fluid intermediate tank in the intermediate tank area.

[0046] Because the pipeline between the secondary devolatilizer and the vacuum condenser is quite large, a specially designed condensate collection tank is used to collect the high-boiling condensate generated in the pipeline. The high-boiling waste liquid precipitated from the vacuum condenser is collected in a waste liquid collection tank, and then centrally discharged into a waste liquid tank for collection. Finally, it is discharged to a waste liquid tank outside the boundary area via a waste discharge pump. The exhaust gas discharged from the liquid ring vacuum is discharged into the waste gas treatment system outside the boundary area for disposal.

[0047] This is usually the final purification step to ensure that stringent environmental standards and product quality requirements are met.

[0048] By employing a gradient operation of this "three-stage vacuum" system, the level of residual monomers can be effectively controlled, thereby ensuring high product quality and performance stability. Furthermore, this method reduces raw material consumption, as more monomers can be recycled and reused instead of being discharged as waste. This not only helps reduce costs but also contributes to environmental protection, reducing pollution. In conclusion, by integrating advanced vacuum systems, manufacturers can improve product quality, expand their application range, and meet market demand for high-performance, environmentally friendly materials.

[0049] This invention allows two sets of equipment to be used simultaneously via connecting pipelines. This concurrent use of two vacuum systems helps to improve the vacuum level, effectively control the level of residual monomers, and thus ensure high product quality and performance stability. Figure 5 The average residual styrene monomer in the product prior to implementation was higher than 450 mg / kg. Figure 6 After using two sets of equipment through connecting pipelines, the average residual styrene monomer in the product was less than 350 mg / kg, which achieved positive results in practical application.

Claims

1. A high-efficiency heat dissipation system for a polystyrene device, characterized in that: Vacuum condenser a (1-1) is connected to liquid ring vacuum pump a (1-3) via a pipeline. Liquid ring vacuum pump a (1-3) is connected to liquid ring sealing liquid tank a (1-2) via a pipeline. Liquid ring sealing liquid tank a (1-2) is connected to cooler a (1-4) via a pipeline. Cooler a (1-4) is connected to liquid ring vacuum pump a (1-3) via a pipeline. The polymerization reactor a (1-8) is connected to the circulating liquid pump a (1-9) via a pipeline. The circulating liquid pump a (1-9) is connected to the circulating liquid intermediate tank a (1-7) via a pipeline. The circulating liquid intermediate tank a (1-7) is connected to the vacuum condenser b (1-5) via a pipeline. The vacuum condenser b (1-5) is connected to the first-stage Roots vacuum pump a (1-14) via a pipeline. The first-stage Roots vacuum pump a (1-14) is connected to the vacuum pump a (1-3). Vacuum condenser b (1-5) and vacuum condenser c (1-6) are connected by pipelines, and vacuum condenser c (1-6) is connected to first-stage devourer a (1-10); The first-stage devolatilizer a (1-10) and the second-stage devolatilizer a (1-11) are connected by a pipeline. The second-stage devolatilizer a (1-11) is connected by a pipeline to the second-stage decondenser a (1-12). The second-stage decondenser a (1-12) is connected to the second-stage Roots vacuum pump a (1-13). The second-stage Roots vacuum pump a (1-13) is connected by a pipeline between the vacuum condenser b (1-5) and the vacuum condenser c (1-6). The intermediate circulating liquid tank a (1-7) is connected to the circulating liquid pump a (1-9) via a pipeline, and the circulating liquid pump a (1-9) is connected to the polymerization reactor a (1-8) via a pipeline; Liquid ring vacuum pump a (1-3) is connected to liquid ring vacuum pump A (2-3) via a pipeline; Vacuum condenser A (2-1) is connected to liquid ring vacuum pump A (2-3) via a pipeline. Liquid ring vacuum pump A (2-3) is connected to liquid ring sealed liquid tank A (2-2) via a pipeline. Liquid ring sealed liquid tank A (2-2) is connected to cooler A (2-4) via a pipeline. Cooler A (2-4) is connected to liquid ring vacuum pump A (2-3) via a pipeline. Liquid ring vacuum pump A (2-3) is connected to vacuum pump B (2-3) via a pipeline. The polymerization reactor A (2-8) is connected to the circulating liquid pump A (2-9) via a pipeline. The circulating liquid pump A (2-9) is connected to the circulating liquid intermediate tank A (2-7) via a pipeline. The circulating liquid intermediate tank A (2-7) is connected to the vacuum condenser B (2-5) via a pipeline. The vacuum condenser B (2-5) is connected to the first-stage Roots vacuum pump A (2-14) via a pipeline. The first-stage Roots vacuum pump A (2-14) is connected to the liquid ring vacuum pump A (2-3). Vacuum condenser B (2-5) and vacuum condenser C (2-6) are connected by pipelines, and vacuum condenser C (2-6) is connected to first-stage devourer A (2-10); The first-stage devolatilizer A (2-10) and the second-stage devolatilizer A (2-11) are connected by a pipeline. The second-stage devolatilizer A (2-11) is connected by a pipeline to the second-stage decondenser A (2-12). The second-stage decondenser A (2-12) is connected to the second-stage Roots vacuum pump A (2-13). The second-stage Roots vacuum pump A (2-13) is connected by a pipeline between vacuum condenser B (2-5) and vacuum condenser C (2-6). The intermediate circulating liquid tank A (2-7) is connected to the circulating liquid pump A (2-9), and the circulating liquid pump A (2-9) is connected to the polymerization reactor A (2-8) through a pipeline.

2. The method of using the high-efficiency heat dissipation system for a polystyrene device as described in claim 1, comprising the following steps: Step a: First, use a single-stage vacuum. The primary vacuum system includes a primary devolatilizer a (1-10), a vacuum condenser c (1-6), a primary Roots vacuum pump a (1-14), a circulating liquid intermediate tank a (1-7), a circulating liquid pump a (1-9), a polymerization reactor a (1-8), a liquid ring vacuum pump a (1-3), a liquid ring sealed liquid tank a (1-2), a vacuum condenser b (1-5), and a cooler a (1-4). After the polymerization reaction is completed, the primary vacuum is used first to remove most of the unreacted monomers and volatile substances. This step rapidly reduces the pressure in the system, thereby facilitating the evaporation of volatiles. After the polymerization reaction is completed, the volatiles discharged from the top of the first-stage devolatilizer a (1-10) are sent to the vacuum condenser c (1-6) for condensation. During this process, the volatiles are condensed into devolatilization condensate at about 20-25°C. This condensate is then pumped into the reactor a (1-8) by the circulating liquid pump a (1-9). Step b: Use a two-stage vacuum. The secondary vacuum includes a secondary devolatilizer a (1-11), a secondary decondenser a (1-12), a secondary Roots vacuum pump a (1-13), a vacuum condenser b (1-5), a primary Roots vacuum pump a (1-14), a circulating liquid intermediate tank a (1-7), a circulating liquid pump a (1-9), a polymerization reactor (1-8), a liquid ring vacuum pump a (1-3), a liquid ring sealed liquid tank a (1-2), and a cooler a (1-4). Subsequently, a secondary vacuum is applied to further reduce the pressure and remove the remaining monomers and other volatile components. This step usually requires more careful control to ensure efficient removal of residues without compromising the quality of the polymer. Vacuum condenser b (1-5) is cooled by chilled water at 5°C to obtain devolatilization condensate at 20-25°C. The condensate from vacuum condenser c (1-6) and vacuum condenser b (1-5) is discharged into circulating liquid intermediate tank a (1-7) after being sealed by a liquid seal. The uncondensed tail gas in vacuum condenser b (1-5) is extracted by first-stage Roots vacuum pump a (1-14) and enters the liquid ring vacuum system together with the tail gas discharged from the top of the polymerization reactor (1-8). The liquid ring vacuum system includes liquid ring vacuum pump a (1-3), liquid ring sealing liquid tank a (1-2) and cooler a (1-4). Liquid ring vacuum pump a (1-3) is connected to liquid ring sealing liquid tank a (1-2) through a pipeline. Liquid ring sealing liquid tank a (1-2) is connected to cooler a (1-4) through a pipeline. Cooler a (1-4) is connected to liquid ring vacuum pump a (1-3) through a pipeline. The vacuum sealing fluid is cooled by the cooler a (1-4) attached to the liquid ring vacuum pump a (1-3), and the temperature of the circulating fluid is controlled at about 10°C to ensure that a good liquid ring vacuum is maintained at 30-45 mmHg. The liquid ring sealing fluid is discharged into the liquid ring sealing fluid tank (1-2) and then returned to the liquid ring pump. Step c: Use a three-stage vacuum. The three-stage vacuum system includes a vacuum condenser a (1-1) connected to a liquid ring vacuum pump a (1-3) via a pipeline, a liquid ring vacuum pump a (1-3) connected to a liquid ring sealed liquid tank a (1-2) via a pipeline, a liquid ring sealed liquid tank a (1-2) connected to a cooler a (1-4) via a pipeline, and a cooler a (1-4) connected to a liquid ring vacuum pump a (1-3) via a pipeline. Liquid ring vacuum pump a (1-3) is connected to liquid ring vacuum pump A (2-3) via a pipeline; Vacuum condenser A (2-1) is connected to liquid ring vacuum pump A (2-3) via a pipeline. Liquid ring vacuum pump A (2-3) is connected to liquid ring sealed liquid tank a (2-2) via a pipeline. Liquid ring sealed liquid tank a (2-2) is connected to cooler A (2-4) via a pipeline. Cooler A (2-4) is connected to liquid ring vacuum pump A (2-3) via a pipeline. Liquid ring vacuum pump A (2-3) is connected to vacuum pump B (2-3) via a pipeline. Finally, a three-stage vacuum is used to ensure that any residual trace volatiles are removed from the polymer.

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