1-2-1 微粉炭コークスの層状燃焼場におけるPM生成(session 1-2 コークス)
奥村 幸彦; 朝日 貴哉; 國本 祐介
日本エネルギー学会大会講演要旨集 2015年 一般社団法人日本エネルギー学会
We conducted combustion experiments under various furnace temperatures, heating rates, and coal types (ash melting point, ash content, and atomic ratio of raw coal) to systematically extract their effects on PM formation. There have been few studies on PM generation in a combustion field of layered char breeze as realized in the sintered ore production process, that is, in the field where pulverized coal char particles contact each other. The following tendencies were observed. With increasing furnace temperature, large ash particles became more prevalent, due to melting and coalescence. This effect was especially prominent for ash particles with a low melting point (approximately 1250℃), as compared to those with a high melting point (approximately 1450℃). As the heating rate increased, small particle generation increased. For raw coal with a high ratio of (H/C)/(O/C)×VM×ASH, char particles tend to become clump and swelling under the influence of adhesion during char formation, forming large ash particles.