掺混LNG的煤粉气流气相燃烧过程中NO生成机理研究  

Study on NOx Formation Mechanism During the Combustion of Pulverized Coal Gas Flow Blened with LNG

作　　者：康志忠[1] 张鑫[1] 丁先 赵虎军 孙哲 KANG Zhizhong;ZHANG Xin;DING Xian;ZHAO Hujun;SUN Zhe(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240;Guodian Longyuan Energy Saving Technology Co.,Ltd.,Beijing 100039,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]上海发电设备成套设计研究院有限责任公司,上海200240 [3]国电龙源蓝天节能技术有限公司,北京100039

出　　处：《动力工程学报》2022年第5期402-406,449,共6页Journal of Chinese Society of Power Engineering

基　　金：国家能源投资集团科技资助项目(GJNY-18-20)。

摘　　要：为研究液化天然气(LNG)的加入对降低旋流燃烧器出口NO生成的影响机理,使用化学动力学分析方法,研究了掺混LNG的煤粉气流的气相燃烧反应过程。结果表明:LNG投运量为50%时,反应器内NO体积分数下降约16%;在低过量空气系数(α<1)和反应温度T>1350 K时加入LNG对降低NO体积分数的效果较好;在过量空气系数α<1的情况下,增加LNG投运量可以促进NO生成量的降低,但在过量空气系数α>1的情况下,增加LNG投运量对降低NO体积分数的影响很小。In order to study the effect of adding liquefied natural gas(LNG)on the reduction of NO generation at the swirl burner outlet,the reaction process of gas-phase combustion of LNG blended pulverized coal flow was studied through chemical kinetic analysis method.Results show that when the ratio of LNG was 50%,the volume fraction of NO in the reactor decreased by 16%.Adding LNG had a better effect on reducing the NO concentration at low excess air coefficient(α<1)and the reaction temperature T>1350 K;In the case of excess air coefficientα<1,increasing LNG commissioning volume promoted the reduction of NO concentration,but in the case of excess air coefficientα>1,increasing LNG had little effect on reducing NO production concentration.

关 键 词：煤粉燃烧 LNG NO 反应机理 CHEMKIN 

分 类 号：TK227.11[动力工程及工程热物理—动力机械及工程]