燃煤砷污染及控制技术研究现状

本文对国内外煤燃烧过程中砷的污染及其控制的研究现状进行了综述。概括了煤燃烧过程中砷的排放对环境产生的危害,分析煤中砷的赋存状态、燃烧过程的转化形态、固砷剂对煤中砷的作用和砷在飞灰中的富集状况,讨论燃前洗煤、燃煤固砷、烟气除尘技术减少煤中砷污染排放的研究现状及可行性;根据洁净煤技术应用现状讨论了动力配煤技术在高砷煤砷污染防治中的积极意义。指出加强对煤中砷的释放、控制理论及实用技术的研究,减少砷污染物排放对环境的污染是今后研究的方向。

STUDY SITUATION ON ARSENIC POLLUTION AND CONTROL TECHNIQUE DURING COAL BURNING

Arsenic pollution and its control by utility technique during coal bums were summarized. The arsenic emission from eoal bum is harmful to environment. The arsenic existing status, transforming form, fixing arsenic agent action and enrichment in ash were ana- lyzed. The techniques of reduce arsenic pollution are used in several ways, such as coal washing before its bum, fixed arsenic during eoal bum, and dust remove from smoke. The study situations and its feasibility were analyzed as well. Based on the cleaning technique, the power blending technology is discussed in high level arsenic pollution and mitigation actions. According to clean coal technology, the paper dis- cussed the significance of power blending technology to be used in the rich arsenic pollution prevention methods. Finally, it is pointed out that in order to reduce arsenic pollution emissions and enhance on the research of arsenic release, control theoretic, and practical technique are the future study goal.