Several control methods for the sensitivity point temperature of distillation columns
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The common control methods for the sensitivity point temperature of distillation columns include the following; what is the basis for their design?
It seems that the focus for this type of question should be on the analysis of the composition of the gas phase after distillation. Since only the amount of steam generated at the upper stage is taken into account, and the amount of liquid flowing downstream is ignored, this temperature serves merely as a signal for controlling the amount of evaporation. For this issue, a comprehensive analysis is still necessary; all the conditions involved in distillation need to be taken into consideration, for reference only.
What I actually want to ask is, for which control schemes are saturated steam and superheated steam suitable as heating media, and why?
It’s a question of which type of steam to use specifically. It should be selected based on the requirements of the distillation process, or according to the needs for comprehensive utilization of heat sources. It’s just that this is related to the heat exchange area design of the evaporator. For reference.