微粉炭燃焼におけるサーマルNO_xの生成機構に関する基礎的研究

概要

論文の詳細を見る
Effects of various basic factors of combustion conditions and coal properties on thermal NO_x formation behaviors in pulverized coal combustion have been experimentally clarified, and a theoretical analysis for the flame structural change around a coal particle has been performed including full chemical kinetics of prompt NO_x formation. Thermal NO_x concentrations much higher than that predicted by the extended Zeldovich mechanism have been experimentally observed even in the usual pulverized coal combustion conditions. The contribution of thermal NO_x to the total NO_x rapidly increases with the increases of flame temperature and oxygen-fuel stoichiometric ratio especially for high volatile coals. Both the large amount of thermal NO_x formation and effects of various factors on it have been well explained by considering the prompt NO_x formation in the flame zone around each particle through HCN and NH formed by the reactions between N_2 in air and hydrocarbons in the evoluted volatile matter.
一般社団法人日本機械学会の論文
1990-10-25