关键词: 泡沫分离, 塔器, 气泡, 吸附, 分离, 富集比, 回收率

Abstract: Foam separation as a new separation technology has the advantages of simple equipment, low energy consumption, easy operation, high efficiency under the condition of low target object concentration and no pollution. Foam separation has great potential in reducing the cost of separation of surfactant and has been widely used in industry. Foam separation equipment has an important effect on foam separation. In this review, a variety of foam separation equipment which are used to separate and recover proteins, organic pollutants, natural products, metal ions, microalgae and so on in recent literatures were analyzed. According to the development process of foam separation, foam separation equipment is divided into traditional foam separation equipment and improved foam separation equipment. Currently, traditional foam separation equipment is still widely used, but this type of equipment has certain limitations on the adsorption of target object and foam drainage, especially the foam drainage, which makes it difficult to improve the enrichment ratio. However, on the basis of the traditional foam separation equipment, the separation effect of foam separation can be improved by improving the structure of the equipment, including the shape of separation column, the internal components of separation column, and the series separation column. In this review, improved foam separation equipment is divided into improved single-stage foam separation equipment, multi-stage foam separation equipment, and comprehensively improved foam separation equipment. The function mechanism and separation effect of the improved foam separation equipment are emphatically introduced. Compared with the traditional foam separation equipment, the improved foam separation equipment breaks through the limitations of the traditional foam separation equipment, strengthens the adsorption of the separated material in the gas-liquid interface, promotes the foam drainage and improves the enrichment rate of the target to be separated. Although some progress has been made in the study of improved foam separation equipment, there are still some problems to be solved. In this work, the function mechanism and separation effect of various foam separation equipment are summarized, which has positive significance for the development of foam separation equipment in the future.

Key words: foam separation, column, bubble, absorption, separation, enrichment ratio, recovery rate