燃煤电厂湿法脱硫废水零排放处理技术进展

Development of Zero Discharge Treatment Technology for Wet Desulfurization Wastewater in Coal-fired Power Plant

目前,脱硫废水主要采用化学沉淀法处理,但是该工艺存在药剂投加量大、污泥产生量多、部分指标达标困难等不足。随着人们对污染治理的关注度持续增加,近年来,湿法脱硫技术越来越广泛地应用在燃煤电厂烟气脱硫中。脱硫废水的零排放处理日益受到人们的重视,我国的零排放处理技术正处于探索与实践阶段。本文首先介绍了我国零排放技术的现状,然后分析了不同零排放技术的优势和缺点,并指出了其今后的发展方向。

At present, the desulfurization wastewater is mainly treated by chemical precipitation, but there are many disadvantages such as large dosage of medicament, large amount of sludge production, and difficulties in some indexes. With the increasing attention paid to pollution control, wet flue gas desulphurization technology has been widely used in flue gas desulfurization in coal-fired power plants in recent years. The zero discharge treatment of desulfurized wastewater has attracted more and more attention. China＇s zero emission treatment technology is at the stage of exploration and practice. This paper first introduces the current situation of zero emission technology in China, then analyzes the advantages and disadvantages of different zero emission technologies, and points out its future development direction.