Studies of Affecting Factors on the Process of Vacuum Membrane Distillation

Vacuum membrane distillation is widely applied in seawater desalination, aqueous solution treatment, solution concentration, super pure water preparation and environmental conservation with its distinctive advantages. However, the studies on vacuum membrane distillation are still quite scarce. In this paper, a new mass and heat transfer model describing the hollow fiber vacuum membrane distillation process is proposed, and the orthogonal collocation method is used to calculate the temperature and concentration distribution inside the tube of the hollow fiber membrane. The effects of solution strength, temperature, flow, vacuum tightness were analyzed and discussed in the process of vacuum membrane distillation, which provides new theoretical foundation for the industrial application of vacuum membrane distillation technique.