The Present State and Prospect of Water Consumption in Coal-Fired Power Plants

doi:10.11930/j.issn.1004-9649.201907169

Abstract

Abstract: By summarizing the water balance test data and high-efficiency water-saving processes of typical coal-fired power plants, the water economic indexes such as water intake volume for unit power generation volume are analyzed to evaluate the water consumption level of power plants. The analysis results indicate that the power plants with lower water intake volume are characterized by advanced design concepts, effective management and reasonable reuse of wastewater. According to the calculation result, the water intake volume of coal-fired power plants (once-through cooling) can be lowered down even below 0.20 m³/(MW·h). Power plants of 1 000 MW class unit with flue gas condensation technology can produce 80~90 m³/h condensate water at full load in winter, which can be recycled back to the flue gas desulfurization system and industrial water system. As the approach of water system transformation in power plant tend to be more reasonable, the achievement of "zero replenishment of industrial water" technology can be expected in the near future.

Key words: coal-fired power plant, water balance test, water intake volume per power generation volume, water-saving technology, zero replenishment of water, zero discharge of wastewater

LU Junchao, TAO Leixing, YUE Chunmei, CHEN Rui, LIU Zhichao, WANG Yanyan, ZHENG Fangdong, WAN Di. The Present State and Prospect of Water Consumption in Coal-Fired Power Plants[J]. Electric Power, 2020, 53(3): 139-146.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201907169

https://www.electricpower.com.cn/EN/Y2020/V53/I3/139

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