低温多效蒸馏海水淡化装置大型化中试试验研究

通过模拟大型低温多效蒸馏海水淡化的中试试验装置，探究了蒸汽压缩喷射器 （ＴＶＣ）工作压力、蒸发温度、喷淋海水密度以及二次蒸汽回热加热器对海水淡化装置重要性能参数——产水量、造水比的作用规律，为大型海水淡化装置结构设计、工艺流程优化提供技术依据和指导。研究表明：TVC引射蒸汽流量随着引射蒸汽压力的增大而线性增大，提高进入蒸发器的蒸发温度和喷淋密度，以及设置二次蒸汽回热加热器可以提高装置淡水产量。

Pilot Experiments on Large-Scale Low Temperature Multi-Effect Distillation Desalination

In order to provide technical instructions on the structure design and technical process optimization of large desalination equipment, based on the pilot experiments of large-scale low temperature multi-effect distillation desalination(LT-MED), the effects of different parameters on the performance of the desalination equipment are studied, such as the motive steam and suction steam pressure of thermal vapor compressor (TVC), the evaporating temperature, the flow rate of seawater spray and the steam preheater. The results show that the TVC suction flow rate increases linearly with the growth of suction steam pressure. Also the gained output ratio(GOR) and freshwater production can be improved by increasing the evaporation temperature and proper seawater spray density as well as adopting steam preheaters.