Investigation of Fly Ash and Activated Carbon Obtained from Pulverized Coal Boilers. (Report for September 1, 2003 to September 1, 2004).

Levy, E. K. ; Kiely, C.

Technical Information Center Oak Ridge Tennessee

关键词: Boilers;    Active carbon;    Air heaters;    Fly ash;    Fluidized beds;   

RP-ID  :  DE2005835779

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

One of the techniques for Hg capture in coal-fired boilers involves injection of activated carbon (AC) into the boiler downstream of the air preheater. Hg is adsorbed onto the AC particles and fly ash, which are then both removed in an electrostatic precipitator or baghouse. This project addresses the issues of Hg on activated carbon and on fly ash from a materials re-use point of view. It also addresses the possible connection between SCR reactors, fly ash properties and Hg capture. The project is determining the feasibility of separating AC from fly ash in a fluidized bed and of regenerating the separated AC by heating the AC to elevated temperatures in a fluidized bed. The temperatures needed to drive off the Hg from the ash in a fluidized bed are also being determined. Finally, samples of fly ash from power plants with SCR reactors for NO(sub x) control, are being analyzed to determine the effect of SCR on the ash. These analyses will also determine the properties of ash which are important for Hg capture.