多级闪蒸海水淡化与水电联产模拟与优化

SIMULATION AND OPTIMIZATION OF MULTI-STAGE FLASH DESALINATION OF COMBINED WATER AND ELECTRICITY PRODUCTION

海水淡化技术已成为解决淡水资源紧缺的有效途径之一。将贯通型(OTMSF)、带有盐水循环器(MMSF)和带有排热段(CMSF)的3种不同结构的多级闪蒸(Multi-stage flash,MSF)海水淡化装置分别与水电联产进行集成,并建立集成系统的数学模型,以最大经济效益为优化目标,探讨各操作参数和结构参数对集成系统性能的影响。结果表明,产水量一定时,3种集成系统的经济效益均随闪蒸级数的增大呈现出先增大后减小的变化趋势,而发电量则均出现下降的趋势。产水量Md增大时,CMSF和OTMSF系统的总经济效益均增大,且OTMSF的总经济效益高于CMSF;MMSF的经济效益明显低于前两种,其变化趋势是先升高后下降。

The technology of seawater desalination has become an effective method for solving the shortage of the world freshwater resources.The cogeneration integrated mathematical model is being presented based on three different MSF（Multi-stage flash,MSF） desalination plants once-through MSF（OTMSF）,mixer brine recycle MSF（MMSF） and MSF with a heat rejection section（CMSF） which are combined with water and electricity.The objective of the mathematical model is to maximum the total economic benefits of the integrated system based on the three mathematical model above and discussion the effect of the operating and structure parameters on the performance of the system.The results showed that the economic benefit of the three integrated structures reaches the maximum when the series reach a certain value.With increase of the water production（Md）,the economic benefits of the three integrated increase,but when the Md reaches a certain value,the economic benefits of the CMSF is higher than the OTMSF;while the economic benefits of the MMSF is significantly lower than the other two,trend then decreased.