化工进展Issue(9)：2298-2303,6.DOI:10.3969/j.issn.1000-6613.2014.09.011
新型低氮燃气分级燃烧器燃烧特性和NOx排放的CFD研究
CFD study on combustion properties and NOx emission of reboiling furnace for xylene tower
摘要
Abstract
By using CFD software Fluent,a numerical simulation was carried out to study the combustion behavior and NOx emission of a xylene tower in gas-oil burner. The problem of high NOx emission was analyzed and a novel low NOx staged-fuel burner structure was brought up. Based on the new burner structure,orthogonal simulations were conducted to study the influences of operating parameters (including air preheated temperature Tair, excess air factorα, and primary fuel gas mass ratio Rp) on the radiation surface heat flux (RSHF),radiation section outlet temperature (RSOT),flame height and volume fraction of NOx. Simulation results of the in-service burners showed good agreement with site running data,suggesting good prediction of the chosen models for the internal flow,radiation,combustion and NOx formation. Simulation results of the new burner showed that higher air preheated temperature could increase the radiative heat flux while also aggravating the NOx emission;excess air factor could enlarge the radiative heat flux and reduce NOx emission;varied primary fuel gas mass ratio made no obvious differences on both radiative heat flux and NOx emission.It was concluded that air preheated temperature of 220℃,excess air ratio of 1.05 and primary gas ratio of 0.24 were the optimal operating conditions,under which radiative heat flux was 37.45kW/m2 while NOx emission simulated to be 12.1μL/L.关键词
燃气分级燃烧器/空气预热温度/过剩空气系数/氮氧化物Key words
staged-fuel burner/air preheated temperature/excess air factor/nitrogen oxide分类
能源科技引用本文复制引用
吴晓磊,刘波,任政,王元华,徐向荣,李旭灿..新型低氮燃气分级燃烧器燃烧特性和NOx排放的CFD研究[J].化工进展,2014,(9):2298-2303,6.基金项目
中国石油化工股份有限公司项目（312016）。 （）
