Briefly introduce the working principle of the outer coil tube heating stainless steel reactor
The external coil heating stainless steel reaction kettle works through an indirect heating mechanism of "external coil heat source → kettle wall heat transfer → kettle material heating". The core is to prevent the heat source from directly contacting the material, achieve uniform temperature control and material pollution-free. The specific process is divided into three steps.
The external coil heating stainless steel reaction kettle works through an indirect heating mechanism of "external coil heat source → kettle wall heat transfer → kettle material heating". The core is to prevent the heat source from directly contacting the material, achieve uniform temperature control and material pollution-free. The specific process is divided into three steps.
1. Heat source cycle input: provides stable heat
Heating media (such as steam, thermal oil, hot water) are introduced through pipelines into the spiral or segmented coils wrapped around the outer wall of the reaction vessel.
Different heat sources are suitable for different processes: steam is used for high-temperature heating (usually ≤ 180 ℃), thermal oil is suitable for medium to high temperature requirements (≤ 300 ℃), and hot water is used for low-temperature heating (≤ 100 ℃).
The medium continues to flow inside the coil, transferring heat to the stainless steel kettle body through the coil wall to avoid local heat accumulation.
2. Heat conduction into the kettle: uniform transfer without pollution
Stainless steel kettle body (mostly made of 304 or 316L material) serves as an intermediate heat transfer carrier to evenly transfer the heat from the coil to the materials inside the kettle.
The thickness of the kettle wall is usually 3-10mm, which has good thermal conductivity and corrosion resistance, and can quickly and evenly transfer heat, keeping the temperature difference of the materials inside the kettle within 5 ℃.
Due to the complete isolation between the heat source (coil) and the material, it can avoid the leakage of heating medium or the corrosion and detachment of components that may contaminate the material, making it suitable for high-purity demand scenarios.
3. Correct temperature control adjustment: matching process requirements
Real time monitoring of material temperature inside the kettle through a temperature control system, and dynamic adjustment of heating medium parameters to ensure temperature stability.
The temperature sensor provides real-time feedback on the temperature inside the kettle. If it is lower than the set value, the heat source flow rate can be increased (such as increasing steam pressure or increasing the circulation speed of heat transfer oil); If it is higher than the set value, reduce the heat source input or introduce cooling medium (some models include cooling coils).
The overall temperature control accuracy can reach ± 1 ℃, meeting the temperature stability requirements of different reactions such as esterification, dissolution, and concentration.
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