含硫天然气再燃还原NO的化学动力学数值研究  

Chemical Kinetics Numerical Ivestigation of NO Reduction by Acid Natural Gas Used Reburning Technology

作　　者：王义德 孙巧群[3] 李喜梅 刘奇 高建民[2] 杜谦[2] WANG Yi-de;SUN Qiao-qun;LI Xi-mei;LIU Qi;GAO Jian-min;DU Qian(Shandong Special Equipment Inspection Institute Co.,Ltd.,Jinan 250101,China;Research Institute of Combustion Engineering,Harbin Institute of Technology,Harbin 150001,China;College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China;China Special Equipment Inspection and Research Institute 4,Beijing 100029,China)

机构地区：[1]山东省特种设备检验研究院有限公司,济南250101 [2]哈尔滨工业大学燃烧工程研究所,哈尔滨150001 [3]哈尔滨工程大学航天与建筑工程学院,哈尔滨150001 [4]中国特种设备检测研究院,北京100029

出　　处：《科学技术与工程》2018年第27期135-139,共5页Science Technology and Engineering

基　　金：国家重点研发计划(2017YFF0209805);国家自然科学基金(51506035)资助

摘　　要：为实现含硫天然气在锅炉燃烧及其氮氧化物减排中的应用,从化学反应动力学角度,采用软件CHEMKIN-PRO和Leeds综合机理探究了CH_4/H_2S浓度、过量空气系数和停留时间对含硫天然气还原NO的影响规律。结果表明:随着CH_4浓度的增加,NO的还原率升高;但达到一定数值后,CH4浓度不再是影响NO还原率的主导因素。H_2S浓度增加有利于降低CH_4还原NO的温度,但对NO还原有一定的削弱作用。存在最佳的过量空气系数使CH_4/H_2S还原NO效率最高,NO还原效率曲线呈单峰分布,能够为含硫天然气再燃还原氮氧化物的工业应用提供一定的参考。In order to achieve the application of sour natural gas in boiler combustion and nitrogen oxides emission reduction,the CHEMKIN-PRO software and Leeds combined mechanism were used to investigate effects of CH 4/H 2S concentration,excess air coefficient and residence time on NO reduction from the chemical reaction kinetics.The results show that NO reduction rate increases with the increase of CH 4 concentration,but the CH 4 concentration is no longer the dominant factor after it reached a certain value.Increasing H 2S concentration is helpful to reduce the temperature of CH 4 reduction NO,but it has a definite weakening effect on NO reduction.There exists the optimum excess air coefficient which makes the NO reduction efficiency highest,and the NO reduction efficiency curve is unimodal distribution.some references can be provided for sour natural gas’s industrial application to reduce nitrogen oxides emission by reburning technology.

关 键 词：甲烷 硫化氢 氮氧化物 再燃技术 化学动力学 

分 类 号：TK16[动力工程及工程热物理—热能工程]