Open AccessCOAL PARTICLE FLOW PATTERNS FOR O{sub 2} ENRICHED, LOW NO{sub x} BURNERS
Author(s) -
Jennifer Curtis
Publication year - 2004
Language(s) - English
Resource type - Reports
DOI - 10.2172/825268
Subject(s) - combustion , flow (mathematics) , pulverized coal fired boiler , coal , particle (ecology) , particulates , materials science , mechanics , flow conditions , environmental science , mineralogy , chemistry , waste management , geology , physics , engineering , oceanography , organic chemistry
This year we focused on investigating the effect of particulate fines in both the hot flow and cold flow studies. This report summarizes the results of those studies in the hot flow and cold flow geometries. In the hot flow studies, increasing the fines content in the pulverized coal enhances combustion stability producing attached flames that were otherwise detached. NO{sub x} emissions are reduced by up to 50% through flame attachment. For always-attached flames, increasing the fraction of fines had little impact on total NO emissions. In the cold flow studies we found that the presence of the fine particles enhanced the velocity fluctuations of the coarse particles. The presence of coarse particles, however, did not affect the motion of the fine particles