煤炭转化2012，Vol.35Issue(3)：55-59,5.
新型液排渣燃烧器内燃烧特性的数值模拟
NUMERICAL SIMULATION OF BURNING CHARACTERISTICS OF A NOVEL LIQUID SLAG-REMOVAL BURNER
摘要
Abstract
Numerical simulation on a novel liquid slag-removal burner is performed to study the influence of excess air coefficient on velocity, temperature and component concentration distribution. Results show that small excess air coefficient (α= 0. 7, 0. 8) can result in low burnout rate of pulverized coal. When a is no lower than 1. 0, pulverized coal can burn more completely, but NOx emission increases. In this paper, staged combustion is carried out in the burner with less oxygen (α = 0. 9) to reduce local oxygen concentration, which can not only realize liquid slag discharge, but also inhibit the generation of NOx. Over-fire air added into the furnace after high temperature flue gas gets cool makes the combustible components burn again, which improves the burn-out ratio. Thermal state experiment is conducted on the burner to investigate the influence of heat load by combining simulation with experiment, which shows the burner has good adaptability to variable heat load. The numerical simulation results tally with the experiment results.关键词
液排渣燃烧器/气固两相流/过量空气系数/燃尽率/NOx排放Key words
liquid slag-removal burner, gas-solid flow, excess air coefficient, burn-out rate, NOx. emission分类
化学化工引用本文复制引用
冉景煜,刘丽娟,黎柴佐..新型液排渣燃烧器内燃烧特性的数值模拟[J].煤炭转化,2012,35(3):55-59,5.基金项目
重庆市自然科学基金重点项目(2009BA6067). （2009BA6067）
