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

Yousen ZHANG; Jiang FAN; Tao DING; Weixiong CHEN; Shuran ZHAO; Miaomiao LIU

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

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

Power Generation and Environmental Protection | 更新时间：2025-06-06

- Influence of Steam Ejector on Low-temperature Multi-effect Distillation System Under Wide Load Operation of Power Plant
- Power Generation Technology Vol. 41, Issue 4, Pages: 369-377(2020)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program of China(2018YFB0604303)
- DOI：10.12096/j.2096-4528.pgt.19167
  CLC： TM621
- Received：25 November 2019，
  
  Published：31 August 2020
- 稿件说明：
移动端阅览
Yousen ZHANG, Jiang FAN, Tao DING, et al. 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.
DOI：

Yousen ZHANG, Jiang FAN, Tao DING, et al. 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. DOI： 10.12096/j.2096-4528.pgt.19167.

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.

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