电厂宽负荷运行下蒸汽喷射器对低温多效蒸馏系统的影响
摘要：淡水资源匮乏问题日益严重，火电厂耦合低温多效蒸馏（low-temperature multi-effect distillation，LT-MED）海水淡化技术因可有效降低制水成本而被广泛利用。利用Ebsilon软件对某电厂和低温多效蒸馏海水淡化耦合系统进行建模，分析了电厂宽负荷下蒸汽喷射器对水电联产系统热经济性的影响规律。研究结果表明：基于单级蒸汽喷射器的水电联产系统，以电厂75% THA工况设计下的蒸汽喷射器的性能最佳。对于带两级蒸汽喷射器的水电联产系统，当电厂负荷在75% THA工况时系统的制水电耗量相比单级蒸汽喷射器系统降低了13.65%，并且电厂负荷在50% THA工况以上时，带两级蒸汽喷射器系统的制水电耗量较单级蒸汽喷射器系统的低。
Abstract:The problem of lack of fresh water resources becomes more and more serious. The coupling of low-temperature multi-effect distillation (LT-MED) seawater desalination technology in thermal power plants is widely used, because it can effectively reduce the cost of water production. Ebsilon software was used to model the power plant and a LT-MED seawater desalination coupling system. The influences of steam ejectors on the thermal economy of the water and power cogeneration system under wide load were analyzed. The results show that the coupled system has the optimal performance for single-stage steam ejector at the 75% THA condition design of the power plant. For a cogeneration system with a two-stage steam ejector, the system's electricity loss for water production (ELWP) is reduced by 13.65% than the system with single-stage steam ejector, when the plant load is at 75% THA. And the two-stage steam's ELWP is also lower than that of the single stage steam ejector system when the plant load is above 50% THA.
标题：电厂宽负荷运行下蒸汽喷射器对低温多效蒸馏系统的影响
title:Influence of Steam Ejector on Low-temperature Multi-effect Distillation System Under Wide Load Operation of Power Plant
作者：张友森,范江,丁涛,陈伟雄,赵舒然,刘苗苗
authors:Yousen ZHANG,Jiang FAN,Tao DING,Weixiong CHEN,Shuran ZHAO,Miaomiao LIU
关键词：电厂宽负荷,蒸汽喷射器,低温多效蒸馏,海水淡化,热经济性,
keywords:wide load of power plant,steam ejector,low-temperature multi-effect distillation (LT-MED),seawater desalination,thermal economy,
发表日期：2020-08-31
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