Heat exchange circulating system of chlorinated polyethylene reaction kettle
By setting up a closed circulation system with the inner heat exchange zone and the jacketed outer heat exchange zone in the reactor, the problems of slow temperature control speed and poor uniformity of the chloride polyethylene reactor are solved, and fast and accurate temperature control and low energy consumption production are achieved.
Patent Information
- Application Number
- CN202422265076.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The existing chlorinated polyethylene reactors have slow temperature control speed, poor temperature uniformity, and high energy consumption, which affects product quality and stability.
A hollow baffle is arranged in the reactor to form an inner heat exchange zone, and together with the outer heat exchange zone of the jacket form a closed circulation system, which achieves rapid and precise temperature control through the heat exchanger and the circulation pump.
It realizes rapid and uniform control of material temperature in the reactor, reduces energy consumption and production costs, and improves product quality.
Smart Images
Figure CN223069493U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of the preparation process of chlorinated polyethylene, in particular to a heat exchange circulation system for a chlorinated polyethylene reaction kettle. Background Art
[0002] In the field of chlorinated polyethylene production, the polymerization reaction kettle is one of the core devices. During the polymerization reaction process, the control of temperature is crucial, which directly affects the reaction rate and the quality of the product. Therefore, how to accurately and quickly control the temperature inside the reaction kettle has been a problem studied in the field of chemical engineering equipment. At the same time, the design and optimization of the temperature control system are also important topics in the field of reaction kettle equipment.
[0003] The existing solutions mainly achieve the temperature control of the materials inside the reaction kettle by setting a jacket outside the reaction kettle and injecting hot water or cold water into the jacket. In addition, there are also some systems that set up a stirring device to make the materials inside the reaction kettle mix evenly, so as to improve the temperature uniformity. However, there are still some problems and disadvantages in the actual application of the existing technology. First of all, the traditional temperature control method, such as injecting hot water or cold water through the jacket, has a slow temperature adjustment speed and cannot meet the requirements of rapid temperature rise and fall. Secondly, due to the uneven distribution of the materials inside the reaction kettle, the temperature mixing uniformity is poor, which will affect the quality and stability of the product. Finally, the existing reaction kettle only relies on the stirring paddle to improve the temperature uniformity of the materials, with a high maintenance cost and high energy consumption, increasing the production cost. Summary of the Utility Model
[0004] Aiming at the above deficiencies, the technical problem to be solved by the utility model is to provide a heat exchange circulation system for a chlorinated polyethylene reaction kettle that can better accurately control the reaction temperature and improve the temperature uniformity of the materials.
[0005] To solve the above technical problem, the technical solution of the utility model is: a heat exchange circulation system for a chlorinated polyethylene reaction kettle, including a reaction kettle and a heat exchanger. A heat exchange jacket is arranged on the kettle body of the reaction kettle, and an external heat exchange area is formed inside the heat exchange jacket. A hollow baffle is arranged inside the kettle body of the reaction kettle, and an internal heat exchange area is formed in the cavity of the hollow baffle. The external heat exchange area is communicated with the internal heat exchange area. A heat exchange liquid inlet and a heat exchange liquid outlet are jointly arranged in the external heat exchange area and the internal heat exchange area. The heat exchange liquid inlet and the heat exchange liquid outlet are respectively connected to the heat exchanger through a liquid delivery pipeline. A circulation pump is installed on the liquid delivery pipeline between the heat exchanger and the heat exchange liquid inlet. A closed circulation system is formed by the external heat exchange area, the internal heat exchange area and the heat exchanger, and the heat exchanger is connected to a temperature rise and fall control system.
[0006] As a preferred technical solution, temperature measurement points are respectively arranged at the heat exchange liquid inlet and the heat exchange liquid outlet.
[0007] As a preferred technical solution, the heat exchanger is a plate heat exchanger or a shell-and-tube heat exchanger.
[0008] Due to the adoption of the above technical solution, the utility model has at least the following beneficial effects:
[0009] (1) By arranging an internal heat exchange area in the hollow baffle, a closed circulation system is formed by the internal heat exchange area of the baffle, the external heat exchange area of the jacket and the heat exchanger. In this way, by controlling the temperature of the closed circulation system, the temperature of the materials in the reaction kettle can be quickly increased or decreased according to a predetermined program, which can improve the efficiency and accuracy of temperature control, greatly shorten the production time, and this cannot be achieved by the traditional external jacket water temperature control method.
[0010] (2) By arranging a hollow baffle in the reaction kettle, the heat exchange liquid (circulating water) flows inside the hollow baffle. By increasing the contact area with the materials in the reaction kettle, the temperature of the slurry in the kettle can be effectively mixed evenly, and the product quality can be improved. Compared with the existing jacket temperature control system, this system has a simple structure, is convenient for operation and maintenance, and has low energy consumption, thus reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The following drawings are only intended to illustrate and explain the utility model schematically and do not limit the scope of the utility model. Among them:
[0012] Figure 1 is a schematic structural diagram of an embodiment of the utility model.
[0013] In the figure: 10 - reaction kettle; 11 - heat exchange jacket; 12 - external heat exchange area; 13 - hollow baffle; 14 - internal heat exchange area; 15 - heat exchange liquid inlet; 16 - heat exchange liquid outlet; 17 - temperature measurement point; 20 - heat exchanger; 31 - infusion pipeline; 32 - circulation pump; 40 - temperature rising and falling control system. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] The following further elaborates the utility model in conjunction with the drawings and embodiments. In the following detailed description, only some exemplary embodiments of the utility model are described by way of illustration. It is beyond doubt that those of ordinary skill in the art can recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the utility model. Therefore, the drawings and description are illustrative in nature and not used to limit the protection scope of the claims.
[0015] Such as Figure 1As shown in the figure, the heat exchange circulation system of a chlorinated polyethylene reactor includes a reactor 10 and a heat exchanger 20. The heat exchanger 20 can be a plate heat exchanger or a shell-and-tube heat exchanger, and both should fall within the protection scope of the present utility model. A heat exchange jacket 11 is provided on the body of the reactor 10. An external heat exchange area 12 is formed inside the heat exchange jacket 11. A hollow baffle 13 is provided inside the body of the reactor 10. The cavity of the hollow baffle 13 forms an internal heat exchange area 14. The external heat exchange area 12 is communicated with the internal heat exchange area 14. A heat exchange liquid inlet 15 and a heat exchange liquid outlet 16 are jointly provided in the external heat exchange area 12 and the internal heat exchange area 14. Temperature measurement points 17 are respectively provided at the heat exchange liquid inlet 15 and the heat exchange liquid outlet 16. The heat exchange liquid inlet 15 and the heat exchange liquid outlet 16 are respectively connected to the heat exchanger 20 through a liquid delivery pipeline 31. A circulation pump 32 is installed on the liquid delivery pipeline 31 between the heat exchanger 20 and the heat exchange liquid inlet 15. The external heat exchange area 12, the internal heat exchange area 14 and the heat exchanger 20 form a closed circulation system. The heat exchanger 20 is connected to a temperature rising and falling control system 40. The temperature rising and falling control system 40 can be implemented by a PLC to achieve automatic temperature rising or falling control. Those skilled in the art can implement its functions by using conventional technical means and will not be elaborated herein.
[0016] Assume that the target temperature inside the reactor is 125 °C and the set temperature rising speed is 5 °C / min. The specific control method is as follows:
[0017] Turn on the temperature rising and falling control system 40. The temperature rising and falling control system 40 will adjust the temperature of the circulating water (i.e., the heat exchange liquid) inside the closed circulation system under the action of the heat exchanger 20 according to the set program, so as to drive the temperature of the materials inside the reactor to rise and fall. By adjusting the heating power and the cooling rate, the temperature of the materials inside the reactor is quickly raised to 125 °C. During this process, the temperature rising speed and the target temperature can be adjusted or the temperature rising speed can be adjusted in sections to meet different production requirements.
[0018] Turn on the circulation pump 32. Set the water flow rate to 2 cubic meters per hour and the flow velocity to 1 meter per second. The external heat exchange area 12 and the internal heat exchange area 14 of the reactor are communicated with the circulating water system to form a closed circulation system, thereby improving the efficiency and accuracy of temperature control. During this process, the water flow rate and the flow velocity can be adjusted to optimize the effect of temperature control. During this process, the production parameters can be adjusted to further improve the product quality.
[0019] The above is only the schematic specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. Chlorinated polyethylene reactor heat exchange circulation system, including a reactor and a heat exchanger, characterized in that: A heat exchange jacket is provided on the kettle body of the reactor. An external heat exchange area is formed within the heat exchange jacket. A hollow baffle is provided within the kettle body of the reactor, and a cavity of the hollow baffle forms an internal heat exchange area. The external heat exchange area is communicated with the internal heat exchange area. A heat exchange liquid inlet and a heat exchange liquid outlet are jointly provided in the external heat exchange area and the internal heat exchange area. The heat exchange liquid inlet and the heat exchange liquid outlet are respectively connected to a heat exchanger through a liquid delivery pipeline. A circulation pump is installed on the liquid delivery pipeline between the heat exchanger and the heat exchange liquid inlet. The external heat exchange area, the internal heat exchange area and the heat exchanger form a closed circulation system, and the heat exchanger is connected to a temperature control system for raising and lowering temperature.
2. The heat exchange circulation system of the chlorinated polyethylene reactor according to claim 1, characterized in that: Temperature measurement points are respectively provided at the heat exchange liquid inlet and the heat exchange liquid outlet.
3. The heat exchange circulation system of the chlorinated polyethylene reactor according to claim 1 or 2, characterized in that: The heat exchanger is a plate heat exchanger or a shell and tube heat exchanger.