燃煤烟气中汞去除的研究进展

摘要

燃煤电厂是最主要的汞排放源，本文介绍了电厂燃煤过程中汞的存在形态及影响汞去除率的主要因素；通过介绍燃煤电厂的基本烟气净化流程，指出利用现有烟气净化设备协同除汞的可行性；并较为详细地论述了各种汞排放控制技术的研究进展，同时对烟气脱汞技术的研究趋势进行了展望。%Mercury emissions from coal-fired power plants are believed to be the largest source of anthropogenic mercury emissions. This paper illustrates the form of mercury and the main factors which affect the elimination rate of mercury. Through the introduction of the air pollution control devices (APCDs ), synergistic control is feasible by taking advantage of existing APCDs. The research progress of mercury emission control is summarized. The absorbents for mercury assorption, such as active carbon, activated carbon fiber, ash, polymeric chitosan, natural mineral sorbents, and new kinds of absorbents are summarized. Recent advances in non-injection mercury sorption technologies are reviewed. Future research directions are suggested.