低阶煤热解半焦燃烧N_2O的生成特性  

CHARACTERISTICS OF N_2O FROM COMBUSTION OF SEMI-COKE DURING LOW RANK COAL PYROLYSIS

作　　者：杨彪[1] 龚志军[1] 李海广[1] 李保卫 武文斐[1] 

机构地区：[1]内蒙古科技大学能源与环境学院,白云鄂博矿多金属资源综合利用国家重点实验室,内蒙古包头硕士生014010

出　　处：《煤炭转化》2016年第4期61-64,共4页Coal Conversion

基　　金：内蒙古自治区科技计划项目(20130310);内蒙古自治区高等学校创新团队研究计划项目(NMGIRT1406)

摘　　要：采用立式煤粉燃烧电阻炉装置,研究了燃烧气氛(O_2/N_2和O_2/CO_2气氛)、石英砂质量分数和氧气体积分数对半焦燃烧时N_2O生成特性的影响.结果表明:燃烧气氛对N_2O收率无明显影响,随着温度升高,N_2O收率显著降低(最大降幅为1.96%);添加石英砂对N_2O收率影响明显,在石英砂质量分数为50%,温度为1 300℃时,N_2O收率较未添加石英砂时增加约2.5%;N_2O收率在低氧气体积分数(20%)时受氧气体积分数影响,在高氧气体积分数(40%)时受焦炭颗粒数量影响.The characteristics of N_2O were studied in the furnace vertical device under different atmospheres（O_2/N_2 and O_2/CO_2 atmosphere）,different mass ratio of quartz sand and different volume fraction of oxygen.The result shows that the atmospheres have no effect on the N_2O yield,with the temperature increasing,the N_2O yield decrease significantly（the maximum drop is about 1.96%）;after the mass ratio of quartz sand changing,the N_2O yield is influenced obviously,when the mass ratio of quartz sand is 50%,the N_2O yield at 1 300 ℃increase about2.5% compared with adding no quartz sand;under the condition of low oxygen volume fraction（20%）,N_2O yield is affected by the oxygen volume fraction,but under the condition of high oxygen volume fraction（40%）,it is affected by the number of coke particles.

关 键 词：低阶煤 半焦 燃烧 N2O收率 立式管式炉 

分 类 号：TQ534[化学工程—煤化学工程]