Role of Wipers in Heat-and-Mass Transfer during Distillation

Abstract

The paper presents findings of experiments on heat-and-mass transfer and measurements of pressure drop in structured packings with different numbers of wipers. Usually, each element of packing has two wipers. The aim of the study is understanding of how the basic parameters of column change when each element of packing has three wipers, except for the first layer from below with four wipers. Several series of experiments were carried out. In the first series, packing with three wipers was not irrigated. In the second series, the column worked in the normal mode with irrigation and had two wipers per layer. The third series was conducted with three wipers per layer and four wipers on the first layer from below. For comparison with experiments with a large column, measurements were made with identical mixture composition at the inlet, the layers of the packing rotated relative to one another by 70\({}^{\circ}\), and the packing irrigated from 18 nozzles. The measurement results are presented below.