一、综述近年来随着空分设备规模的增大,产品品种规格的增多,有气态产品和液态产品,有不同纯度和不同压力的产品。加之流程的多样化,有常规的外压缩空分设备,也有内压缩空分设备,也 I. Overview In recent years, with the increasing size of air separation plants, product specifications increased, there are gaseous products and liquid products, with different purity and different pressure products. Coupled with the diversification of processes, there are conventional external compressed air separation equipment, internal compression air separation equipment, but also