中文摘要：

在渗透汽化膜组件被密闭于真空罩的设计中,渗透蒸汽中一部分将会在真空罩内表面冷凝,这有利于膜下游的渗透蒸汽分馏和冷凝回收。本文对真空罩内冷凝行为进行了分析,建立了冷凝传热的物理和数学模型,定义了真空罩冷凝效率及其计算公式。进行了渗透汽化＋真空罩冷凝的实验,测试结果与理论计算值较为符合。分析了蒸汽温度、真空罩外部空气温度和膜渗透通量等因素对真空罩冷凝效率的影响。研究结果对真空罩渗透汽化膜装置设计和工程化具有参考价值。

英文摘要：

In the design of the pervaporation membrane module that is enclosed in a vacuum shell, a portion of the permeate vapor will condense on the inner surface of the vacuum shell, which facilitates fractiona- tion and condensation recovery in the membrane downstream. In this paper, the condensation behavior of vacuum shell is analyzed, the physical and mathematical models of condensing heat transfer are estab- lished, the condensation efficiency of vacuum shell is defined. Experiments were carried.out for pervapora- tion and vacuum envelope condensation and the test results were in good agreement with the calculated val- ues. The effects of steam temperature, air temperature of vacuum shell, membrane permeation flux in vac- uum shell were analyzed. The result probably is valuable for the design and engineering of vacuum pervap- oration membrane module.