Safe feeding device of solid-liquid-gas three-phase reaction kettle
By using components such as heating jackets and preheater coils, the problems of uneven feed temperature and fixed chiller power in the vinyl chloride polymerization reaction were solved, achieving stable temperature control inside the reactor and improving product quality and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-03-03
AI Technical Summary
In the existing vinyl chloride polymerization process, uneven feed temperature, inconsistent feed rate, and fixed chiller power cause temperature fluctuations inside the reactor, affecting reaction efficiency and safety.
The reactor employs components such as a heating jacket, a preheater coil, and a temperature control coil. By preheating the gaseous raw material with waste heat, combined with a refrigeration unit with adjustable coolant flow, the feed temperature is kept stable, local overheating is avoided, and precise temperature control is achieved inside the reactor.
It improves the stability and safety of the polymerization reaction, ensures product quality, reduces the generation of defective and waste products, and lowers the risk of safety accidents.
Smart Images
Figure CN223959616U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vinyl chloride production technology, specifically a safe feeding device for a solid-liquid-gas three-phase reactor. Background Technology
[0002] Vinyl chloride is an important organic chemical raw material with wide applications in industrial production, especially playing a crucial role in the production of polyvinyl chloride (PVC). PVC, as a common plastic material, is widely used in construction, pipe manufacturing, packaging, and many other fields. However, vinyl chloride itself is a toxic, flammable, and carcinogenic gas; therefore, precise control of reaction conditions and effective implementation of safety measures are essential during its polymerization process.
[0003] Existing equipment for vinyl chloride polymerization faces several challenges. First, feed temperature is a critical factor. In some traditional feeding systems, the lack of effective preheating methods often results in low feed temperatures. When low-temperature materials enter the reactor, they absorb heat, causing a drop in reactor temperature and impacting the polymerization rate and efficiency. Temperature fluctuations can prevent polymerization from proceeding under ideal conditions, leading to uneven polymer molecular weight distribution and reduced product quality. Second, the uniformity of feed rate is another pressing issue. In actual production, design flaws in the feeding system often result in uneven feed rates. This unevenness can lead to excessively high local material concentrations within the reactor, causing localized overheating. Localized overheating not only makes the reaction difficult to control and increases safety risks but can also alter polymer properties, resulting in substandard or even waste products. Furthermore, the refrigeration unit plays a crucial role in reactor temperature control. However, existing refrigeration units typically have constant power and cannot be adjusted in real-time according to actual temperature changes within the reactor. When the temperature inside the reactor suddenly rises, a refrigerator with constant power cannot cool the reactor quickly and effectively, which may lead to runaway reaction and cause a safety accident. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a safe feeding device for a solid-liquid-gas three-phase reactor. By using a heating jacket, connecting pipes and preheater coils in combination, the waste heat of the reactor is used to preheat the gas phase raw materials, ensuring that the feeding temperature reaches a suitable range and avoiding the influence of the reactor temperature on the temperature due to the feeding temperature being too low. This ensures that the polymerization reaction can be carried out under stable temperature conditions and improves the stability of product quality.
[0005] This utility model is achieved using the following technical solution:
[0006] The aforementioned solid-liquid-gas three-phase reactor safety feeding device includes a reactor and a pressure stabilizer. The pressure stabilizer is connected to a desulfurization tower via a deoxygenation adsorption tower. The desulfurization tower is connected to the reactor via a preheater. A feed tank is connected to the reactor. A temperature control coil is installed inside the reactor. The temperature control coil is connected to a refrigeration unit via a pipeline. A preheater coil is installed inside the preheater.
[0007] The temperature control coil is connected to the chiller to cool the materials inside the reactor; the stirring paddle agitates the materials, ensuring uniform mixing; the scraper, driven by a hydraulic telescopic mechanism, cleans the materials adhering to the inner wall of the reactor; the spray plate, connected to a water inlet pipe, cleans the inside of the reactor; the gas phase dispersion plate evenly disperses the gaseous materials entering the reactor; and the heating jacket, connected to the preheater coil via a connecting pipe, heats the reactor. The coordinated operation of these components ensures uniform mixing of materials within the reactor, controllable reaction temperature, and facilitates cleaning and maintenance, ensuring stable reaction operation and improving product quality and production efficiency.
[0008] The desulfurization tower desulfurizes gaseous materials, further purifying them. This reduces the sulfur content in the materials, preventing sulfur impurities from affecting the polymerization catalyst and product quality, and improving product purity and performance.
[0009] The pressure stabilizer is connected to a gas phase inlet pipe, and the deoxygenation adsorption tower is equipped with an inclined perforated bottom plate, with a mesh isolation barrel above the inclined perforated bottom plate.
[0010] A pressure regulator is used to stabilize the pressure of the gaseous material entering the unit, ensuring the stability of subsequent reactions. It prevents fluctuations in the pressure of the gaseous material from affecting the reaction within the reactor, reducing safety risks and improving the controllability of the reaction.
[0011] The connecting pipe between the voltage stabilizer and the deoxygenation adsorption tower is located below the inclined perforated bottom plate, while the connecting pipe between the desulfurization tower and the deoxygenation adsorption tower is located above the inclined perforated bottom plate.
[0012] The reactor is equipped with an internal stirring paddle driven by a stirring motor, and an external heating jacket is provided on the outside of the reactor. The heating jacket is connected to the preheater coil through a connecting pipe.
[0013] The preheater contains a preheater coil, which is connected to the desulfurization tower and the reactor via pipelines. It preheats the material entering the reactor, increasing the feed temperature. This addresses the problem of low feed temperature affecting the reaction, resulting in a more stable temperature inside the reactor, promoting polymerization under suitable temperature conditions, and improving reaction efficiency and product quality.
[0014] The reactor is equipped with a scraper inside, a hydraulic telescopic mechanism is connected to the scraper, and a spray plate is provided above the scraper, with a cleaning water inlet pipe connected to the spray plate.
[0015] The reactor is equipped with a gas phase dispersion plate inside, and the preheater is connected to the gas phase dispersion plate through a pipe.
[0016] The refrigeration unit is connected to the liquid outlet pump via a coolant storage tank, and the liquid outlet pump is connected to the temperature control coil via an inlet pipe.
[0017] The bottom of the coolant storage tank is connected to the outlet pump via a low-level outlet pipe, and the coolant storage tank is connected to the low-level outlet pipe via a high-level outlet pipe. The connection point between the high-level outlet pipe and the coolant storage tank is located at 2 / 3 of the distance from the bottom surface of the coolant storage tank.
[0018] The coolant storage tank stores coolant and works in conjunction with the refrigeration unit and discharge pump to regulate the coolant flow and pressure. This ensures a stable coolant supply. Under normal conditions, coolant is discharged through the high-level discharge pipe for cooling, while during rapid temperature increases in the reactor, coolant is discharged through the low-level discharge pipe. The discharge pump is a variable frequency pump. This allows for flexible adjustment of the coolant flow rate, better coordinating with the refrigeration unit for temperature control of the reactor.
[0019] The working principle of this utility model is as follows:
[0020] The gaseous material enters the pressure regulator via a gas phase inlet pipeline, where the pressure is stabilized at 0.8-1.2 MPa before entering the deoxygenation adsorption tower. In the deoxygenation adsorption tower, the gaseous material first passes through an inclined perforated bottom plate, where impurities are initially filtered. Then, it passes through a mesh separator for further impurity separation before entering the desulfurization tower for desulfurization, and finally into the preheater. In the preheater, the material is preheated to 40-70℃ by the preheater coils. The preheated material is then transported via a connecting pipeline to the gas phase dispersion plate at the bottom of the reactor, where it is evenly dispersed into the reactor. The material in the feed tank is transported to the reactor via pipeline at a flow rate determined according to the reactor volume and reaction rate requirements. Simultaneously, the stirring motor inside the reactor drives the stirring paddle at a speed of 50-200 r / min to stir the material, ensuring uniform mixing and initiating the vinyl chloride polymerization reaction. During the reaction, the reaction temperature inside the reactor is controlled at 40-70℃. When the temperature exceeds 70℃, the refrigeration unit starts, and coolant flows through the coolant storage tank, the outlet pump, and the inlet pipe to the temperature control coil. The outlet pump dynamically adjusts the coolant flow rate within a certain range according to temperature changes to lower the temperature. When the temperature is below 40℃, the heating jacket heats the reactor by exchanging heat with the preheater coil through connecting pipes. During or after the reaction, if material adheres to the inner wall of the reactor, the hydraulic telescopic conveyor drives a scraper to clean the inner wall. Simultaneously, cleaning water enters the cleaning water pipe and reaches the spray plate to clean the inside of the reactor. After the reaction is complete, the product is discharged from the reactor through the corresponding pipes.
[0021] Compared with the prior art, the beneficial effects of this utility model are:
[0022] This utility model employs a safe feeding device for a solid-liquid-gas three-phase reactor. Through the coordinated use of a heating jacket, connecting pipes, and a preheater coil, the waste heat of the reactor is used to preheat the gaseous raw materials, ensuring the feeding temperature reaches a suitable range. This avoids the impact of excessively low feeding temperatures on the reactor's internal temperature, thus guaranteeing that the polymerization reaction can proceed under stable temperature conditions and improving product quality stability. Through a rational structural design, including components such as a pressure regulator and a gas-phase dispersion disc within the reactor, materials can be uniformly fed into the reactor, preventing excessively high local material concentrations, effectively preventing localized overheating, improving reaction controllability and safety, and reducing the generation of defective and waste products. The coordinated use of a coolant storage tank, a discharge pump, and inlet temperature control coil allows for flexible adjustment of the coolant flow rate based on actual temperature changes within the reactor, indirectly achieving dynamic adjustment of the chiller's power. Under normal conditions, cooling occurs through the high-level discharge pipe; when the reactor temperature rises sharply, cooling occurs through the low-level discharge pipe. The discharge pump is a variable frequency pump. It can rapidly increase the flow rate of coolant, accelerate the cooling rate, ensure that the temperature inside the reactor is always within a safe and controllable range, and reduce the probability of safety accidents. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the safety feeding device for the solid-liquid-gas three-phase reactor of this utility model;
[0024] In the diagram: 1. Reactor; 2. Pressure stabilizer; 3. Deoxygenation adsorption tower; 4. Desulfurization tower; 5. Preheater; 6. Feed tank; 7. Refrigeration unit; 8. Coolant storage tank; 9. Gas phase inlet pipe; 10. Inclined perforated bottom plate; 11. Mesh isolation tank; 12. Preheater coil; 13. Gas phase dispersion plate; 14. Temperature control coil; 15. Spray plate; 16. Scraper; 17. Hydraulic expansion joint; 18. Cleaning water inlet pipe; 19. Heating jacket; 20. Connecting pipe; 21. Discharge pump; 22. High-level discharge pipe; 23. Low-level discharge pipe; 24. Inlet pipe to temperature control coil. Detailed Implementation
[0025] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0026] Example 1
[0027] like Figure 1As shown, the solid-liquid-gas three-phase reactor safety feeding device includes a reactor 1 and a pressure regulator 2. The pressure regulator 2 is connected to a desulfurization tower 4 via a deoxygenation adsorption tower 3. The desulfurization tower 4 is connected to the reactor 1 via a preheater 5. A feed tank 6 is connected to the reactor 1. A temperature control coil 14 is installed inside the reactor 1, and the temperature control coil 14 is connected to a chiller 7 via a pipe. A preheater coil 12 is installed inside the preheater 5. The temperature control coil 14 is connected to the chiller 7 and can cool the material inside the reactor. A stirring paddle is used to stir the material to make it mix evenly. A scraper 16, driven by a hydraulic telescopic mechanism 17, can clean the material adhering to the inner wall of the reactor. A spray plate 15 is connected to a cleaning water inlet pipe 18 and can clean the inside of the reactor. A gas phase dispersion plate 13 can evenly disperse the gas phase material entering the reactor. A heating jacket 19 is connected to the preheater coil 12 via a connecting pipe 20 and can heat the reactor. A gas inlet pipe 9 is connected to the pressure stabilizer 2. The deoxygenation adsorption tower 3 has an inclined perforated bottom plate 10 inside, and a mesh isolation tank 11 is located above the inclined perforated bottom plate 10. The connecting pipe between the pressure stabilizer 2 and the deoxygenation adsorption tower 3 is located below the inclined perforated bottom plate 10, and the connecting pipe between the desulfurization tower 4 and the deoxygenation adsorption tower 3 is located above the inclined perforated bottom plate 10. The reactor 1 has an internal stirring paddle driven by a stirring motor. A heating jacket 19 is located on the outside of the reactor 1, and the heating jacket 19 is connected to the preheater coil 12 via a connecting pipe 20. The reactor 1 has an internal scraper 16, with a hydraulic telescopic mechanism 17 connected to the scraper 16. A spray plate 15 is located above the scraper 16, and a cleaning water inlet pipe 18 is connected to the spray plate 15. The reactor 1 also has an internal gas phase dispersion plate 13, and the preheater 5 is connected to the gas phase dispersion plate 13 via a pipe. The refrigeration unit 7 is connected to the outlet pump 21 via the coolant storage tank 8, and the outlet pump 21 is connected to the temperature control coil 14 via the inlet pipe 24. The bottom of the coolant storage tank 8 is connected to the outlet pump 21 via the low-level outlet pipe 23, and the coolant storage tank 8 is connected to the low-level outlet pipe 23 via the high-level outlet pipe 22. The connection point between the high-level outlet pipe 22 and the coolant storage tank 8 is located at 2 / 3 of the distance from the bottom surface of the coolant storage tank 8.
[0028] The above-mentioned solid-liquid-gas three-phase reactor safety feeding device includes the following steps during operation:
[0029] (1) The gaseous material enters the pressure regulator 2 through the gas phase inlet pipe 9. After the pressure is stabilized at 0.8-1.2MPa, it enters the deoxygenation adsorption tower 3 and the desulfurization tower 4 in sequence. In the deoxygenation adsorption tower 3, impurities are removed by the inclined perforated bottom plate 10 and the mesh isolation barrel 11. Then it enters the desulfurization tower 4 for desulfurization. After that, it enters the preheater 5 and is preheated to 40-70℃ by the preheater coil 12. (2) The preheated gaseous material is evenly fed into the reactor 1 through the gas phase dispersion plate 13 at the bottom of the reactor 1 via the connecting pipe 20. At the same time, the material in the feed tank 6 is transported to the reactor 1 according to the flow rate determined by the production calculation. The stirring motor in the reactor 1 drives the stirring paddle to mix the material fully at a speed of 50-200r / min and start the polymerization reaction. (3) The temperature is strictly controlled at 40-70℃ during the reaction process. If the temperature is higher than 70℃, the refrigeration unit 7 is turned on, and the coolant enters the temperature control coil 14 through the coolant storage tank 8, the outlet pump 21, and the inlet temperature control coil pipe 24. The outlet pump 21 flexibly adjusts the coolant flow rate to cool down according to the temperature. If the temperature is lower than 40℃, the heating jacket 19 heats the reactor 1 by means of heat exchange with the preheater coil 12. (4) During or after the reaction, if there is material adhering to the inner wall of the reactor 1, the hydraulic telescopic machine 17 drives the scraper 16 to clean it. At the same time, the cleaning water enters the cleaning water pipe 18 to the spray plate 15 to clean the inside of the reactor. After the reaction is completed, the product is discharged from the reactor 1 through the corresponding pipe.
Claims
1. A safe feeding device for a solid-liquid-gas three-phase reactor, characterized in that, It includes a reactor (1) and a pressure regulator (2). The pressure regulator (2) is connected to the desulfurization tower (4) through the deoxygenation adsorption tower (3). The desulfurization tower (4) is connected to the reactor (1) through the preheater (5). The reactor (1) is connected to a feed tank (6). The reactor (1) is equipped with a temperature control coil (14). The temperature control coil (14) is connected to the refrigerator (7) through a pipe. The preheater (5) is equipped with a preheater coil (12).
2. The safe feeding device for a solid-liquid-gas three-phase reactor according to claim 1, characterized in that, The pressure regulator (2) is connected to a gas phase inlet pipe (9), and the deoxygenation adsorption tower (3) is provided with an inclined perforated bottom plate (10), and a mesh isolation barrel (11) is provided above the inclined perforated bottom plate (10).
3. The safe feeding device for a solid-liquid-gas three-phase reactor according to claim 2, characterized in that, The connecting pipe between the voltage stabilizer (2) and the deoxygenation adsorption tower (3) is located below the inclined perforated bottom plate (10), and the connecting pipe between the desulfurization tower (4) and the deoxygenation adsorption tower (3) is located above the inclined perforated bottom plate (10).
4. The safe feeding device for a solid-liquid-gas three-phase reactor according to claim 1, characterized in that, The reactor (1) is equipped with a stirring paddle driven by a stirring motor inside, and a heating jacket (19) is provided on the outside of the reactor (1). The heating jacket (19) is connected to the preheater coil (12) through a connecting pipe (20).
5. The safe feeding device for a solid-liquid-gas three-phase reactor according to claim 1, characterized in that, The reactor (1) is equipped with a scraper (16) inside, and a hydraulic telescopic mechanism (17) is connected to the scraper (16). A spray plate (15) is provided above the scraper (16), and a cleaning water inlet pipe (18) is connected to the spray plate (15).
6. The safe feeding device for a solid-liquid-gas three-phase reactor according to claim 1, characterized in that, The reactor (1) is equipped with a gas phase dispersion plate (13) inside, and the preheater (5) is connected to the gas phase dispersion plate (13) through a pipe.
7. The safe feeding device for a solid-liquid-gas three-phase reactor according to claim 1, characterized in that, The refrigeration unit (7) is connected to the liquid outlet pump (21) through the coolant storage tank (8), and the liquid outlet pump (21) is connected to the temperature control coil (14) through the inlet pipe (24).
8. The safe feeding device for a solid-liquid-gas three-phase reactor according to claim 7, characterized in that, The bottom of the coolant storage tank (8) is connected to the outlet pump (21) through a low-level outlet pipe (23), and the coolant storage tank (8) is connected to the low-level outlet pipe (23) through a high-level outlet pipe (22). The connection between the high-level outlet pipe (22) and the coolant storage tank (8) is located at 2 / 3 of the distance from the bottom surface of the coolant storage tank (8).