热力发电2017，Vol.46Issue(2)：67-74,8.DOI:10.3969/j.issn.1002-3364.2017.02.067
低氧体积分数下煤粉的NO排放及燃烧特性
Characteristics of NO emission and combustion during pulverized coal combustion under conditions with low oxygen concentration
摘要
Abstract
To investigate the influence of combustion atmosphere,ambient temperature,O2 concentration and gas flow on the NO releasing and the coal combustion characteristics,the combustion experiments were carried out on a horizontal tube furnace.The results show that,compared with the O2/N2 atmosphere and O2/Ar atmosphere,the discharge amount of NO and the peak temperature decreased,and the reaction time became longer in O2/CO2 atmosphere.As the temperature rose from 1 200 K to 1 300 K,the reaction time shortened,while the NO emission increased and peaked at 1 300 K.When the temperature increased further,the NO reduction rate was greater than the generation rate and the NO emission decreased.When the O2 concentration was below 10 ％,the oxidizing reaction of N was inhibited and the corresponding NO emission was low.On the contrary,the CO/NO/char reduction reaction was inhibited and the corresponding NO emission grew rapidly when the O2 concentration ranged from 10％ to 21％.With an increase in the gas flow,the O2 concentration around the pulverized coal particle increased,which enhanced the oxidizing reaction rate of N,so the corresponding conversion rates of N became greater.关键词
煤粉/燃烧特性/燃烧气氛/管式炉温度/低氧体积分数/气体流量/NO排放Key words
pulverized coal/combustion characteristics/combustion atmosphere/tube furnace temperature/low oxygen concentration/flow rate/NO emission分类
能源科技引用本文复制引用
钱彬,周志军,陈立平,郭隆真,邵力成,山石泉,岑可法..低氧体积分数下煤粉的NO排放及燃烧特性[J].热力发电,2017,46(2):67-74,8.基金项目
国家科技支撑计划项目(2015BAA04B00)National Key Technology Research and Development Program of the Ministry of Science and Technology of China (2015BAA04B00) （2015BAA04B00）
