采用膜蒸馏技术浓缩中药提取液，在进料侧间歇鼓泡产生两相流。

The effect of two-phase flow on fouling control in the concentration of extracts of Chinese traditional medicine (TCM) by direct contact membrane distillation (DCMD) has been investigated.

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实验表明，随进料温度、进料流速、冷侧真空度的增大，膜通量增大；

Results of VMD experiments indicate that flux increases when feed temperature, feed rate and vacuum degree increase.

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考察了理论板数、进料位置等对蒸汽消耗量及废水排放的影响；研究了增加侧采工艺和热泵回收工艺对节能减排的促进作用。

Promotion of added side withdrawing technology and heat pump recovery process for energy conservation and emission reduction of the prefractionator is made.

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