How to control the pressure of distillation column in general chemical industry? Is it through the flow in and out of the tower, the vent valve, or the temperature of multiple measuring points on the

How to control the pressure of distillation column in general chemical industry? Is it through the flow in and out of the tower, the vent valve, or the temperature of multiple measuring points on the tower body? Chemical distillation can be divided into three types according to pressure: atmospheric distillation, vacuum distillation and pressurized distillation. For atmospheric distillation, the pressure is mainly controlled by the amount of rising steam, so the amount of rising steam in the tower is changed by controlling the power of the tower kettle. Of course, the reflux at the top of the tower also affects the tower pressure. The reflux is large, the pedal level is high, the pressure drop is large, and the pressure in the tower rises.

For decompression operation, decompression device has great influence on pressure;

Of course, the pressurization device is mainly influenced by the pressurization equipment.

Whether decompression or pressurization, rising steam and reflux have an impact on pressure.