Device for eliminating jamming of pipeline valve of polystyrene reaction system
By installing jacketed tubes at both ends of the valve of the polystyrene reaction system and circulating high-temperature thermal oil to melt polymers, the problem of valve prone to jamming is solved, and the normal switching of the valve and safe production are achieved.
Patent Information
- Application Number
- CN202422261455.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-14
AI Technical Summary
In the polystyrene reaction system, the valve is prone to jam due to the self-polymerization of styrene materials, resulting in increased switching resistance and internal leakage.
Set a jacketed tube at both ends of the valve, and high-temperature thermal oil is circulated inside the jacketed tube to melt the polymer to avoid jamming.
Effectively eliminate valve jams, reduce switching resistance, ensure safe production, extend the service life of the valve, and reduce replacement frequency and manual maintenance costs.
Smart Images
Figure CN223042702U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a device for eliminating the jamming of pipeline valves in a polystyrene reaction system. Background Technique
[0002] In a polystyrene reaction system, common equipment or standby equipment is generally provided, and the common equipment and the standby equipment are in a parallel relationship. For example, when polystyrene is undergoing a reaction operation, the styrene colloidal solution material will be preheated first and then pass through a filtering device into a reaction kettle. Since polystyrene needs to operate continuously for 24 hours during the reaction operation, but in order to achieve the filtering effect, the filtering device needs to replace the filter element or be cleaned regularly. Therefore, the filtering device is provided with a main filtering device and a secondary filtering device. When it is necessary to clean the filtering device or replace the filter element, the main filtering device and the secondary filtering device can be switched to ensure the reaction operation of polystyrene. And in order to achieve the replacement, valves are arranged at the main filtering device and the secondary filtering device to control the flow direction of the styrene colloidal solution material.
[0003] However, in the prior art, due to the easy self-polymerization characteristic of styrene materials, the following problems will occur: 1. When the valve is in the closed state, the long-term self-polymerization of styrene materials will cause the material to change from a liquid state to a solid state, thus sticking the valve plug and causing the valve to jam; 2. When the valve is in the open state, due to the high temperature of the reaction system materials, solid polymers will be formed at the dead corners of the valve groove and the valve body, resulting in problems such as an increase in the valve opening and closing resistance and leakage due to the valve not closing tightly. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a device for eliminating the jamming of pipeline valves in a polystyrene reaction system, which can avoid an increase in the valve opening and closing resistance and prevent the valve from jamming.
[0005] To solve the above technical problems, the utility model can adopt the following technical solutions to achieve:
[0006] A device for eliminating the jamming of pipeline valves in a polystyrene reaction system includes a feed preheater, a filtering unit, and a reaction kettle. The feed end of the filtering unit is connected to the discharge end of the feed preheater, the discharge end of the filtering unit is connected to the feed port of the reaction kettle, and first control valves are respectively arranged at the feed end and the discharge end of the filtering unit. Both ends of the first control valve are provided with jacket pipes, and heat transfer oil flows through the jacket pipes.
[0007] In one embodiment, the jacket pipe includes an inner pipe and an outer pipe. One end of the inner pipe is butted against the first control valve. The outer pipe is arranged outside the inner pipe and forms a closed flow channel with the inner pipe. A heat transfer oil inlet communicating with the flow channel is arranged at the lower part of one end of the outer pipe, and a heat transfer oil outlet communicating with the flow channel is arranged at the upper part of the other end of the outer pipe.
[0008] In one embodiment, second control valves are provided at both the heat transfer oil inlet and the heat transfer oil outlet.
[0009] In one embodiment, the length of the jacketed pipe is 15 cm - 30 cm.
[0010] In one embodiment, the temperature of the heat transfer oil is 260°C - 280°C.
[0011] In one embodiment, at least one set of filtering units is provided, which includes a main filter and a sub-filter, and first control valves are provided at the feed ends and the discharge ends of the main filter and the sub-filter.
[0012] In one embodiment, the first control valve is a gate valve. Beneficial effects
[0013] 1. By providing jacketed pipes at both ends of the first control valve and providing circulating heat transfer oil inside the jacketed pipes, the polymer at the first control valve can be melted by the high-temperature heat transfer oil, thereby quickly eliminating the stuck fault of the first control valve and avoiding the stuck of the first control valve and the increase in the switching resistance of the first control valve.
[0014] 2. By melting the polymer at the first control valve with the high-temperature heat transfer oil flowing inside the jacketed pipe, safe production is ensured, the service life of the first control valve can be effectively improved, frequent replacement of the first control valve can be avoided, and the enterprise cost can be reduced accordingly.
[0015] 3. Avoid the valve from getting stuck in the standby equipment (sub-filter) during long-term non-operation, which may lead to process fluctuations and product quality problems.
[0016] 4. Since the jacketed pipes and the circulating heat transfer oil are added, there is no need to increase the regular inspection, maintenance and inspection by staff, effectively reducing the labor cost and labor intensity of the staff. Description of the drawings
[0017] Figure 1 is a schematic structural diagram of the device for eliminating the stuck of the pipeline valve in the polystyrene reaction system of the present invention;
[0018] Figure 2 is the Figure 1 enlarged view at A in the device for eliminating the stuck of the pipeline valve in the polystyrene reaction system of the present invention;
[0019] Figure 3 is a schematic structural diagram of the jacketed pipe of the device for eliminating the stuck of the pipeline valve in the polystyrene reaction system of the present invention.
[0020] 100. Feed preheater;
[0021] 200, Filter unit; 210, Main filter; 220, Sub-filter;
[0022] 300, Reactor;
[0023] 400, First control valve;
[0024] 500, Jacketed pipe; 510, Inner pipe; 520, Inner pipe; 530, Flow channel; 540, Heat transfer oil inlet; 550, Heat transfer oil outlet; 560, Second control valve. Detailed implementation manners
[0025] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used herein in the description of the present utility model are only for the purpose of describing specific implementation manners and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0028] Please refer to Figures 1 to 3 , a device for eliminating the jamming of pipeline valves in a polystyrene reaction system, comprising a feed preheater 100, a filter unit 200, and a reactor 300. The feed end of the filter unit 200 is connected to the discharge end of the feed preheater 100, and the discharge end of the filter unit 200 is connected to the feed inlet of the reactor 300. First control valves 400 are respectively provided at the feed end and the discharge end of the filter unit 200, and jacketed pipes 500 are provided at both ends of the first control valve 400, and heat transfer oil flows through the jacketed pipes 500.
[0029] Specifically, in this embodiment, the styrene glue liquid material will first enter the feed preheater 100 for preheating, and then be transported from the discharge end of the feed preheater to the filtration unit 200. The filtration unit 200 filters the transported styrene glue liquid material. After filtration, the styrene glue liquid material will be transported from the discharge end of the filtration unit 200 to the reaction kettle 300 for reaction operation. In order to ensure that polystyrene can react for a long time, the filtration unit 200 includes a main filter 210 and a secondary filter 220. The feed ends of the main filter 210 and the secondary filter 220 are respectively connected to the feed preheater 100, and the discharge ends of the main filter 210 and the secondary filter 220 are respectively connected to the reaction kettle 300. First control valves 400 are respectively arranged at the feed ends and discharge ends of the main filter 210 and the secondary filter 220. The first control valves 400 open / close the main filter 210 and the secondary filter 220 to realize the switching operation between the main filter 210 and the secondary filter 220, thereby controlling the flow direction of the styrene glue liquid material.
[0030] Since the first control valve 400 at the main filter 210 / secondary filter 220 is in the open state, the corresponding secondary filter 220 / main filter 210 is in the closed state, and due to the self-polymerization characteristic of styrene material, over time, solid polymers will form at the dead corners of the first control valve 400 in the open state, which will further cause an increase in the switching resistance of the first control valve 400 and poor closing, resulting in internal leakage problems of the first control valve 400. At the same time, the first control valve 400 in the closed state will be stuck by the solid polymer formed by the self-polymerization of styrene material. Therefore, in this embodiment, jacket pipes 500 are arranged at both ends of the first control valve 400, and heat transfer oil flows in the jacket pipes 500. The temperature of the heat transfer oil is 260°C - 280°C. Through the circulation of high-temperature heat transfer oil within this range inside the jacket pipes 500, the solid polymers formed inside the first control valve 400 can be melted (the melting temperature of the solid polymer < 180°), thereby avoiding the situation of the first control valve 400 being stuck or having an increased switching resistance, enabling the first control valve 400 to open / close normally, and ensuring the switching and transportation of the styrene glue liquid material.
[0031] In addition, by melting the polymers inside the first control valve 400 through the high-temperature heat transfer oil flowing in the jacket pipes 500, safe production can be ensured, the service life of the first control valve 400 can be effectively increased, frequent replacement of the first control valve 400 can be avoided, thereby reducing the enterprise cost, and there is no need to increase the regular inspection, maintenance and check by staff, effectively reducing the labor cost and labor intensity of the staff.
[0032] In this embodiment, the first control valve 400 is a gate valve. Since gate valves are commonly available on the market, they are convenient to purchase, labor-saving when opening / closing, and due to their simple shape, compact structure, and good manufacturing process, they are more convenient for installation and maintenance.
[0033] Meanwhile, in order to better filter the styrene glue solution material and improve the reaction effect, in this embodiment, at least one set of filtering units 200 is provided. Multiple sets of filtering units 200 are connected in sequence. And for each set of filtering units 200, a first valve body 400 and a jacket pipe 500 are provided at the feed end and the discharge end of the main filter 210 and the secondary filter 220, so as to realize the parallel relationship between the standby equipment and the common equipment in the polystyrene reaction system and ensure the reaction operation of polystyrene.
[0034] Please refer to Figure 3 , in order to enable the heat transfer oil to flow inside the jacket pipe 500 and melt the solid polymer in the first valve body 400, the jacket pipe 500 in this embodiment includes an inner pipe 510 and an outer pipe 520. One end of the inner pipe 510 is docked with the first control valve 400. The outer pipe 520 is arranged outside the inner pipe 510 and forms a closed flow channel 530 with the inner pipe 510. And a heat transfer oil inlet 540 communicating with the flow channel 530 is provided at the lower part of one end of the outer pipe 520, and a heat transfer oil outlet 550 communicating with the flow channel 530 is provided at the upper part of the other end of the outer pipe 520.
[0035] Among them, the overall length of the jacket pipe 500 is 15 cm - 30 cm. One end of the inner pipe 510 of the jacket pipe 500 is hermetically docked with the first control valve 400 through a flange, and the other end of the inner pipe 510 is also hermetically docked with the corresponding pipeline through a flange. The outer pipe 520 is placed outside the inner pipe 510 and is sealed with the inner pipe 520 to form a closed flow channel 530. And in order to facilitate the circulation of the heat transfer oil, a heat transfer oil inlet 540 is opened at the lower part of one end of the outer pipe 520, and a heat transfer oil outlet 550 is opened at the upper part of the other end. Meanwhile, in order to control the heat transfer oil inlet 540 and the heat transfer oil outlet 550, therefore, second control valves 560 are provided at both the heat transfer oil inlet 540 and the heat transfer oil outlet 550. By controlling the second control valves 560, the high-temperature heat transfer oil enters the flow channel 530 through the heat transfer oil inlet 540. The high-temperature heat transfer oil in the flow channel 530 will conduct heat to the first control valve 400 to melt the solid polymer in the first control valve 400, and then the high-temperature heat transfer oil in the flow channel 530 flows out through the heat transfer oil outlet 550 for circulation, avoiding the situation that the first control valve 400 gets stuck or the switching resistance increases, so that the first control valve 400 can be normally opened / closed.
[0036] The above has shown and described the basic principles, main features and advantages of the present utility model. Any person skilled in the art can smoothly implement the present utility model as shown in the accompanying drawings of the specification and described above; however, any minor changes, modifications and equivalent variations made by those skilled in the art within the scope of the technical solution of the present utility model by using the technical content disclosed above are equivalent embodiments of the present utility model; at the same time, any changes, modifications and equivalent variations made to the above embodiments based on the essential technology of the present utility model still fall within the scope of protection of the technical solution of the present utility model.
Claims
1. A device for eliminating stuck valves in a polystyrene reaction system pipeline, characterized in that: The invention comprises a feed preheater, a filter unit and a reactor, wherein the feed end of the filter unit is connected to the discharge end of the feed preheater, the discharge end of the filter unit is connected to the feed port of the reactor, and a first control valve is respectively arranged at the feed end and the discharge end of the filter unit, and both ends of the first control valve are arranged with a jacket pipe, and heat transfer oil flows in the jacket pipe.
2. The device for eliminating stuck valves in the pipeline of a polystyrene reaction system according to claim 1, characterized in that: The jacket tube includes an inner tube and an outer tube, one end of the inner tube is connected to the first control valve, the outer tube is arranged on the outside of the inner tube and forms a closed flow channel with the inner tube, and a heat transfer oil inlet connected to the flow channel is arranged at the lower part of one end of the outer tube, and a heat transfer oil outlet connected to the flow channel is arranged at the upper part of the other end of the outer tube.
3. The device for eliminating stuck valves in the pipeline of a polystyrene reaction system according to claim 2 is characterized in that: The heat transfer oil inlet and the heat transfer oil outlet are both provided with a second control valve.
4. The device for eliminating stuck valves in the pipeline of a polystyrene reaction system according to claim 1, characterized in that: The length of the jacket tube is 15cm-30cm.
5. The device for eliminating stuck valves in the pipeline of a polystyrene reaction system according to claim 1, characterized in that: The temperature of the heat transfer oil is 260°C-280°C.
6. The device for eliminating stuck valves in the pipeline of a polystyrene reaction system according to claim 1, characterized in that: The filtering unit is provided with at least one group, and comprises a main filter and a sub-filter, and the feeding end and the discharging end of the main filter and the sub-filter are both provided with a first control valve.
7. The device for eliminating stuck valves in the pipeline of a polystyrene reaction system according to claim 1, characterized in that: The first control valve is a gate valve.