对数平均推动力法计算并流吸收塔的传质单元数

摘要

The law of logarithmic mean driving force formula of double absorber ransfer unit number in low concentration system was deduced according to the definition of transfer unit number. The structural characteristics and the using tricks of the formula was analyzed in this work. The result shows the structure of the logarithmic mean driving force formula for double mass transfer unit operations is the same as counter-current operation, regardless the absorption and desorption, as long as the operation of relations and equilibrium relations are linear. The structure is simple, easy to remember and grasp.%根据传质单元数的定义,对低浓度体系并流吸收塔传质单元数的对数平均推动力法计算公式进行了推导.并对公式的结构特点和使用窍门进行了分析.结果表明只要操作关系和相平衡关系都是线性的.不论是吸收还是解吸,并流操作传质单元数的对数平均推动力算法在结构上与逆流操作是一样的.该结构简单、易记,便于掌握.