Abstract: The performance parameters of seawater desalination device under different regenerator setting modes were simulated and compared by using Aspen Plus software in this paper. The setting positions, setting number and air extraction positions of regenerators were analyzed systematically, thus the setting method of regenerator was proposed. The results show that the water production rate can be significantly improved by adding regenerators; the fresh water production rate of the unit is higher when the regenerator is installed in the main pipe than in the branch pipe and small main pipe. Increasing the number of regenerators in the seawater desalination device can improve the water production rate. The research results are of guidance for practical engineering applications.

Key words: seawater desalination, low-temperature multi-effect evaporation, regenerator, water production rate