Pressure control scheme for methanol tower under pressure
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I’ve encountered a design for a methanol tower. According to the calculations, methanol is supposed to come out of the top of the tower; the pressure at the top of the tower is to be controlled at 1.2 MPA, while the pressure in the reflux tank is to be kept at 1.0 MPA. The temperature behind the top condenser is set at 30°C. This design seems unfeasible – what are everyone’s opinions? To achieve this, I think the temperature after cooling needs to be raised above 120°C, and combined control using a choke and a gas-phase bypass is necessary. I would appreciate your advice; thank you!
This post was last edited by Qingchengjun on 2018-3-5 at 15:25. What kind of system is this? What is at the top of the tower? What remains at the bottom of the tower? What is the composition of the feed? Is the reflux tank filled with nitrogen?