Methanol distillation tower reboiler
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What are the effects of a decrease in the steam pressure in the reboiler of a methanol distillation tower?
Generally, saturated pressure and temperature are supposed to correspond to each other.
The temperature difference for heat transfer is small, right? This tests the margin of safety of the heat exchanger
The original reboiler used superheated steam at 0.45 MPa(G) and 180 degrees; now it is intended to be replaced with saturated steam at 0.35 MPa(G), while the flow rate remains unchanged. From the perspective of heat transfer, superheated steam is not as effective as saturated steam; the main considerations are the impact on heat transfer efficiency and the effects on the distillation column. Thank you!
In fact, overheating is mainly to prevent condensate water. Steam heating is primarily related to latent heat, rather than superheated heat.