广东电力Issue(9)：1-6,11,7.DOI:10.3969/j.issn.1007-290X.2015.09.001
新型乏气热风复合送粉系统低 NOx燃烧特性的数值模拟研究
Numerical Simulation Research on Low NOx Combustion Characteristic of New Exhaust-air and Hot Wind Composite Powder Feeding System
摘要
Abstract
Exhaust-air and hot wind composite powder feeding technology could feed pulverizing exhaust-air in primary wind system for powder feeding and avoid bad influence on pulverized coal burn-out and NOx emission by tertiary wind with low pulverized coal concentration.Therefore,a kind of low NOx and low nitrogen combustion technology for new multi-coal a-daptability by using pulverizing exhaust-air transfer and wind hot for composite powder feeding was proposed.By means of numerical simulation method,influence on NOx emission mass concentration and coal burn-out process by exhaust-air trans-fer of the new low NOx combustion system was studied.Results indicate that exhaust-air transfer amount of the new system may increase which might result in pulverized coal burn-out rate decrease but could obviously reduce NOx emission mass con-centration.In practical boiler testing,boiler efficiency reached up to 94% and NOx emission mass concentration was 207.Excellence of each index proved that this system was of remarkable low NOx combustion effectiveness and strong practicability.关键词
煤粉锅炉/乏气转移/NOx 排放/数值模拟Key words
pulverized coal boiler/exhaust-air transfer/NOx emission/numerical simulation分类
能源科技引用本文复制引用
汪华剑,乐方愿,方庆艳,周虹光,张成,陈刚..新型乏气热风复合送粉系统低 NOx燃烧特性的数值模拟研究[J].广东电力,2015,(9):1-6,11,7.基金项目
广东省教育部产学研结合基金项目资助(2012B091100173) （2012B091100173）
