What are the structural design characteristics of the external coil tube heating stainless steel rea
The structural design of the external coil tube heating stainless steel reactor revolves around efficient heating, safe pressure bearing, convenient maintenance, and adaptability to various process media. The core features are as follows:
The structural design of the external coil tube heating stainless steel reactor revolves around efficient heating, safe pressure bearing, convenient maintenance, and adaptability to various process media. The core features are as follows:
1. Double layer structure design of kettle body and coil
The main body is made of stainless steel material (commonly 304, 316L), which is corrosion-resistant and meets the hygiene standards of industries such as food and medicine. The outer wall of the kettle is welded with spiral or vertically arranged heating coils, which are in close contact with the kettle body. Indirect heating of the materials inside the kettle is achieved through the circulation of heat transfer media such as thermal oil and steam inside the coils. This structure avoids direct contact between the heat medium and the material, making it suitable for reaction systems with high purity requirements.
2. Heating uniformity and correct temperature control design
The coil adopts a spiral winding layout (or segmented vertical layout), covering most of the outer wall area of the kettle, with a short and uniform heat transfer path, which can reduce the local temperature difference of the materials inside the kettle; Some models will add thermal conductive sheets between the coil and the kettle body to further improve heat conduction efficiency. At the same time, the kettle body can be equipped with temperature sensors to monitor the material temperature in real time, and the reaction temperature can be controlled correctly by adjusting the flow rate of the heat medium.
3. Design of pressure bearing and anti deformation structures
In response to the steam pressure inside the coil or the circulating pressure of the heat transfer oil during the heating process, the coil is made of thickened stainless steel pipes and fixed to the kettle body through full welding technology. The welds undergo non-destructive testing to ensure pressure stability; The top and bottom of the kettle are designed with reinforced flanges to enhance the overall structural rigidity and avoid deformation of the kettle under high temperature and high pressure conditions. In addition, the kettle is equipped with safety accessories such as safety valves and pressure gauges to prevent overpressure risks.
4. Convenient cleaning and maintenance design
The inner wall of the kettle has been polished, with a smooth surface and no dead corners, making it easy to clean residual materials and suitable for batch switching requirements in intermittent reactions; The spacing between the outer coils should be reasonably reserved to facilitate the cleaning of scale on the outer wall of the coil by the staff or regular maintenance of the welds; Some models of coils adopt a detachable design, which facilitates replacement after damage and reduces maintenance costs.
5. Expansion design adapted to multiple processes
Matchable mixing device: Anchor, paddle, or frame mixers are installed inside the kettle, combined with external coil heating to enhance the heat and mass transfer efficiency of materials, suitable for reactions of high viscosity materials.
Reserved pipe interface: The top of the kettle body is equipped with feeding port, discharging port, emptying port, temperature measuring port, etc., to meet the process requirements of feeding, sampling, tail gas treatment, etc.
Optional insulation layer design: Install rock wool or polyurethane insulation layer on the outside of the coil, and wrap it with a stainless steel shell to reduce heat loss, lower energy consumption, and avoid operator burns.
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