燃煤烟气中零价汞控制技术研究进展

我国燃煤过程中汞的排放越来越引起国际社会的广泛关注。燃煤烟气中排放汞的形态主要以零价汞为主,将气态零价汞转化为易于脱除的二价汞是控制零价汞排放的有效途径。为此,文章对燃煤烟气中零价汞的转化机理以及控制技术现状进行了概括和总结,对不同零价汞控制技术的特点进行比较分析,并初步探讨了其发展趋势。结论得出应充分利用现有的烟气净化设备,经济有效地发挥其在烟气除汞方面的作用。

Progress of Elemental Mercury Control from Coal-fired Flue Gas

Mercury emission from coal-fired process in China has attracted international concerns.Elemental mercury is the major form in mercury emitted from coal-fired flue gas.The effective mercury controlling way is to convert elemental mercury to oxidized mercury,which is easily to be removed then.Main oxidation mechanism and control technologies recently developed were summarized,various control characteristics were compared and analyzed,and trend was also initiatively predicted.Existing flue gas purification devices were proposed to be used fully for removal of elemental mercury from coal-fired flue gas economically and effectively.