中文摘要：

针对一种能实现气液两相逆流-错流撞击的洗涤喷嘴，采用溶氧法、摄像法和电导探针法等考察了操作参数对洗涤器内两相流型、传质性能、局部气含率的影响，并分析了洗涤器内流型、气含率与传质特性的关系．结果表明，由于气液两相沿洗涤器径向分布不均，文献中通过直观观察描述流型的方法明显欠准确．在直观观察的基础上，依据局部气含率分布将两相流型分为液柱型、环流型和泡沫型三类，其中泡沫型分为环状泡沫型和碗状泡沫型两种．为了定量分析不同流型的传质效果，定义了有效传质区（气液接触、传质过程中形成的两相流中气含率75％≤εg≤85％的区域），得出了有效传质体积的计算表达式．气液逆流撞击的洗涤器内有效传质体积越大，传质效果越好．

英文摘要：

The effects of operating parameters on the flow pattern, mass transfer performance and local gas hold-up distribution are studied via the imaging method, dissolved oxygen method and double-sensor conductivity probe to reveal their relationship in a novel washing nozzle which can implement gas-liquid counter-current crossflow impingement. The results show that the flow pattern characterized only by direct observation method in some previous research can not describe it accurately because of the non-uniform gas-liquid racial distributions. Based on the imaging and local gas hold-up measurement, the flow pattern can be divided into five types： liquid column flow, annular flow and bubble flows （including the annular bubble flow and bowl-shaped bubble flow）. Moreover, a new parameter Veer （effective mass transfer zone） in which the local gas hold-up （eg） ranges from 75% to 85% is proposed. It can be used to analyze the mass transfer effect of different flow patterns quantitatively. For any counter-current crossflow gas-liquid impinging scrubber, the mass transfer efficiency increases with the proposed parameter Veer.