燃煤电厂脱硫废水零排放工艺路线研究

Research on Zero Liquid Discharge FGD Wastewater Treatment Technology in Coal-fired Power Plant

摘要: 系统分析及介绍了脱硫废水的水质特点、目前应用及研发的主要工艺路线，对三种成熟或有前景的工艺-反渗透膜浓缩及结晶工艺、旁路烟气余热蒸发结晶技术和旁路烟气余热蒸发浓缩技术进行了技术经济对比，研究表明：旁路烟气余热蒸发浓缩技术具有不需预处理、投资运行成本低，设备占地小，运行维护工作量小、产生污泥量少等优点，综合环保效益好，因此具有广泛的推广应用价值。

Abstract: Flue gas desulfurization (FGD) with high content of salinity and heavy metals is the most criticial pollutant of concern in power plant, this paper introduced its characteristics and the main technologies that used in nowdays. Amony all of these technologies, reverse osmosis treatment, bypass flue gas evaporation technology with crystallizer and bypass flue gas evaporation technology with concentrator are the three promising technolgies. By mean of comparing their technical performances and costs, bypass flue gas evaporation technology with concentrator is the most promising technology because of its lower investment and operating costs, smaller footprint and more environmental friendly.