スチーム直接加熱方式に対する蒸留計算法

概要

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Steam is directly used as the bottom heat source of a distillation column in cases where water is the bottom waste. From the standpoint of reducing consumption of steam as a reboiler heat source, enthalpy analysis around the reboiler is important. A method for calculating the reboiler duty is presented. If the amount of steam is given, the bottom liquid rate is calculated from the column material balance. The enthalpy of steam is considered to be an unknown variable. In the Newton-Raphson algorithm the variable of the bottom liquid rate is replaced by the enthalpy of the steam. Some modifications of the residual functions are made in accordance with the above exchange of the unknown variables. The temperature of the steam is easily calculated from the steam enthalpy.
社団法人化学工学会の論文