摘要
本文采用完整的模拟３维气固两相流动、煤粉燃烧和传热的数值程序对实验室卧式炉分级送风以降低ＮＯｘ生成的燃烧过程进行了数值计算，程序中对气相采用欧拉法的通用输运方程，对煤粉颗粒采用拉格朗日的随机轨道法，用Ｄｅ′Ｓｏｅｔｅ的化学反应机理计算燃料ＮＯｘ的生成和用Ｚｅｌｄｏｖｉｃｈ机理计算热力ＮＯｘ的生成，针对分级燃烧降低ＮＯｘ生成的机理，实验中研究了３种配风工况，并结合数值研究具体分析了各工况下温度场和氧浓度场对ＮＯｘ生成的影响，最后将计算值和实验测得的ＮＯｘ生成量进行了比较，其结果是令人满意的。
fully three-dimensional computer model of a pulverized coal combustion and NOx formation in furnace is presented. The model is based on an Eulerian set of transport equations for the gas phase and a Stochastic Lagrangean approach for the coal particles. The NOx calculation is performed using equations for the transport of Hydrogen cyanide (HCN) and nitric oxide(NO), with the reaction mechanisms proposed by De' Soete. For a lab-scale furnace, experimental studies are performed for three air rates. The predictions are compared with experimental results of NO concentration obtained at outlet. Agreement between the predictions and data is satisfactory.
出处
《燃烧科学与技术》
CAS
CSCD
1996年第3期249-255,共7页
Journal of Combustion Science and Technology
关键词
煤粉
燃烧
数值模拟
氮氧化物
Coal combustion, NOx, Numerical modeling
