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

doi:10.12096/j.2096-4528.pgt.19167

发电技术 ›› 2020, Vol. 41 ›› Issue (4): 369-377.DOI: 10.12096/j.2096-4528.pgt.19167

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

张友森¹(),范江²(),丁涛¹(),陈伟雄^2,*(),赵舒然²(),刘苗苗²()

¹ 神华国华(北京)电力研究院有限公司, 北京市朝阳区 100025
² 动力工程多相流国家重点实验室(西安交通大学), 陕西省西安市 710049

收稿日期:2019-11-25 出版日期:2020-08-31 发布日期:2020-09-01
通讯作者: 陈伟雄
作者简介:张友森(1986),男,高级工程师,主要从事海水淡化、水处理及两相流相关研究, zhangyousen@126.com|范江(1995),男,硕士研究生,主要从事热力系统优化相关研究, 1179988030@qq.com|丁涛(1978),男,高级工程师,主要从事低温多效海水淡化研究, 16850083@chnenergy.com.cn|赵舒然(1995),男,硕士研究生,主要从事水处理、海水淡化及对流换热相关研究, 1346587682@qq.com|刘苗苗(1996),女,硕士研究生,主要从事新一代热电联产系统研究, liumiao3@stu.xjtu.edu.cn
基金资助:
国家重点研发计划项目(2018YFB0604303)

Influence of Steam Ejector on Low-temperature Multi-effect Distillation System Under Wide Load Operation of Power Plant

Yousen ZHANG¹(),Jiang FAN²(),Tao DING¹(),Weixiong CHEN^2,*(),Shuran ZHAO²(),Miaomiao LIU²()

¹ Shenhua Guohua(Beijing) Electric Power Research Institute Co., Ltd., Chaoyang District, Beijing 100025, China
² State Key Laboratory of Multiphase Flow in Power Engineering(Xi'an Jiaotong University), Xi'an 710049, Shaanxi Province, China

Received:2019-11-25 Published:2020-08-31 Online:2020-09-01
Contact: Weixiong CHEN
Supported by:
the National Key Research and Development Program of China(2018YFB0604303)

摘要/Abstract

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。

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

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.

Key words: wide load of power plant, steam ejector, low-temperature multi-effect distillation (LT-MED), seawater desalination, thermal economy

中图分类号:

TM621

张友森,范江,丁涛,陈伟雄,赵舒然,刘苗苗. 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[J]. 发电技术, 2020, 41(4): 369-377.

Yousen ZHANG,Jiang FAN,Tao DING,Weixiong CHEN,Shuran ZHAO,Miaomiao LIU. Influence of Steam Ejector on Low-temperature Multi-effect Distillation System Under Wide Load Operation of Power Plant[J]. Power Generation Technology, 2020, 41(4): 369-377.

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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

Influence of Steam Ejector on Low-temperature Multi-effect Distillation System Under Wide Load Operation of Power Plant

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