泵-马达式能量回收技术在海水淡化工程中的应用进展

小型反渗透海水淡化系统因较少使用能量回收装置,导致效率低、比能耗高,因此研发适用于小型反渗透淡化系统的能量回收装置是目前的研究重点。泵-马达式能量回收系统因总成简单、成本低、脉动小、盐海水无混合和维护方便等特点,适合小型反渗透海水淡化系统,对于提高系统的经济性具有重要意义。为完善泵-马达式能量回收技术,研发高效可靠的回收装置,首先介绍了其基本工作原理和重要性能参数指标;其次,综述了此类装置的国内外研究现状和进展,指出了当前研究尚存在的局限性与不足;最后,从提高能量转换效率、集成化程度、运行稳定性三个方面,给出了泵-马达式能量回收技术未来发展趋势和关键科学问题。

Application Progress of Pump-motor Energy Recovery Technology in Seawater Desalination Project

The small reverse osmosis seawater desalination system has low efficiency and high specific energy consumption because of less use of energy recovery device. Therefore, it is the focus of current research to develop the energy recovery device for small reverse osmosis desalination system. The pump-motor energy recovery system has the advantages of simple assembly, low cost, small pulsation, no mixing of salt and seawater and convenient maintenance. It is proved to be suitable for small reverse osmosis seawater desalination system, which is of great significance to improve the system economy. In order to improve pump-motor energy recovery technology and develop efficient and reliable recovery device, the basic working principle and important performance parameters are introduced at first. Secondly the current research status and progress of this kind of device at home and abroad are reviewed, and the limitations and shortcomings of the current research are pointed out. At last, from the three aspects of improving energy conversion efficiency, degree of integration, and operational stability, the future development trends and key scientific issues of pump-motor energy recovery technology are presented.