China Coal Research Institute Company Limited State Key Laboratory of Coal Mining and Clean Utilization National Key Lab of Energy and Coal High Efficient Uitilization and Energy Saving and Emission Reduction Technology and Equipment

为了进一步改进空气分级燃烧技术及降低煤粉工业锅炉NOx的排放,在自建一维滴管炉系统中进行了煤粉空气分级燃烧和空气不分级燃烧2种试验,探究了过量空气系数、主燃区温度以及二次风比例对NOx排放规律的影响。试验结果表明:空气不分级燃烧时,过量空气系数相同,NOx排放浓度随着主燃区温度的升高而增大;主燃区温度相同,NOx排放浓度随着空气过量系数的增大而增大。空气分级燃烧时,二次风比例相同,随着主燃区温度的升高,NOx排放浓度先升高后降低;主燃区温度相同时,随着二次风比例的降低,NOx排放浓度先降低后升高,当二次风比例为0.56时,NOx排放浓度最低,煤粉的燃尽率最高可达到98.14%,且与空气不分级燃烧相比,NOx的脱除率高达80%。

in ovder o frter impove th stagedair combusion fechmogy and o edc:e th NODemission of the pulveired coal frd inustialboiegin the self esablisted '1D dop-ube bolrsysem ,the puiveized coal stagedair combusion and th non staed ain combustonfests ware condocted. T e paper had a suory on the excessiv ain e rsteth emperatwreof he pimay combusion zone and the seconday af pecentage afifcted to the NOxemsin lan Th test result showed ht wnen th Ln sa edair onbusion ape edthe xcessivean cv fintwoudte the same anth NOmemiss on conertration woub be intreased ih th lemperatre of the.primay combuston zon e ose The temperature of the primary combustion zone woudbe the samean the NOemiss on concentraton woul be inveasedwiththai excssve coefrintincezsed. he th staged an combuston apol t,the seconday ir prc entage would be the sam ith he lemecatreof h primay conbustion zone incesed and the AOxenmssion concehtratonwould b fitiy nceased and then derveased. lci n th emperaure f the primay cone was the sam withth seonday ar eceneare derveased.the NODemiss on cone ntraton wou dfirt educed andlater inivesed and the seconday ir perc enage derese the NoOxenmsin :oncentaton woul erfrsly derease andlae rose W"%en the seconday ir prc antage was 0.56.the NOxemiss on concentraton waud be the lowest n the bumotrae of h uvered ceal woud be 98.14% in max.In comparison with the non staged-air combustion,the NOxremoval rate would be 80%

煤炭科学技术研究院科技发展基金技术创新资助项目(2015CX02)；