Predictions of NOx/N2O emissions from an ultra-supercritical CFB boiler using a 2-D comprehensive CFD combustion model

查看全文 作　　者：Jieqiang [1]Ji;Leming [1]Cheng;Yangjun [1]Wei;Junfeng [2]Wang;Xinyu [2]Gao;Mengxiang [1]Fang;Qinhui [1]Wang

机构地区：[1]State Key Laboratory of Clean Energy Utilization,Institute for Thermal Power Engineering,Zhejiang University,Hangzhou 310027,China;[2]Harbin Boiler Co.,Ltd.,Harbin 150040,China

出　　处：《Particuology》索引2020年第18卷第2期,共11页

基　　金：This work was supported by the National Key Research&Devel-opment Program of China(No.2016YFB0600202-2). 摘　　要：NOx and N2O emissions from an ultra-supercritical circulating fluidized bed(CFB)boiler were predicted using a two dimensional(2-D)comprehensive computational fluid dynamics(CFD)combustion model.This model was developed from a three dimensional model for a supercritical CFB boiler previously constructed by our group.Based on an analysis of the NOx and N2O conversion processes in a CFB boiler,the primary formation and destruction reactions were introduced into the 2-D model and coupled.The resulting model was validated using data from the Baima 600 MW supercritical CFB boiler,and then applied to a 660 MW ultra-supercritical CFB boiler.The effects of excess air,the secondary air(SA)to(primary air(PA)plus SA)ratio and the SA injection height on NOx and N2O emissions were investigated.The results show that a higher excess air volume increases both NOx and N2O emissions,while increasing the SA/(PA+SA)ratio somewhat reduces both the NOx and N2O concentrations.On the basis of the results of this work,optimal locations for SA injection ports so as to lower NOx and N2O emissions are recommended. 关键词：NOx/N2O emissions 2-D comprehensive combustion model Circulating fluidized bed ULTRA-SUPERCRITICAL

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Predictions of NOx/N2O emissions from an ultra-supercritical CFB boiler using a 2-D comprehensive CFD combustion model

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