摘要
研究了工艺参数对烧结燃料NO_x排放浓度的影响规律。研究结果表明:随着烧结温度的升高,烧结燃料NO_x的平均浓度先升高后降低,当烧结温度在1100℃左右时,氮氧化物的平均浓度达到最大值。随着高温恒温时间的延长和升温速率的增大,烧结燃料NO_x的平均浓度均出现降低趋势,分别由87 mg/m^3和91 mg/m^3降低到77 mg/m^3和80 mg/m^3。在氧含量低于21%时,NO_x的平均浓度随着氧含量的升高而升高。NO_x的排放浓度主要取决于烧结生产中氮氧化物的生成及被还原程度。因此,烧结生产中可通过控制烧结温度、增大升温速率、延长高温时间或降低含氧量等方式抑制NO_x的生成或促进其还原,进而降低烧结烟气中NO_x的排放量。
Effects of processing parameters on emission concentration of the fuel NO_x in the sintering process were investigated using tube furnace.The results show that the average concentration of fuel NO_x increases first and then decreases with increasing the sintering temperature,reaching a maximum with the sintering temperature approximately at 1100℃.As the holding time of high temperature and heating rate increase,the average concentration of fuel NO_x decreases from 87 mg/m^3 and 91 mg/m^3 to 77 mg/m^3 and 80 mg/m^3,respectively.When the oxygen content is lower than 21%,the average concentration of fuel NO_x has positive correlations with the oxygen content in the sintering process.The emission concentration of fuel NO_x mainly depends on the formation and reduction of NO_x in sintering process.Therefore,in the sintering process,the formation of NO_x can be inhibited or reduced by controlling sintering temperature,increasing heating rate,prolonging high temperature time or decreasing oxygen content,then the discharge amount of NO_x in the sintering flue gas can be reduced.
作者
刘东辉
李俊华
彭悦
陈建军
李兵
李雨青
Liu Donghui;Li Junhua;Peng Yue;Chen Jianjun;Li Bing;Li Yuqing(School of Environment,Tsinghua University,Beijing 100084,China)
出处
《钢铁钒钛》
CAS
北大核心
2020年第1期70-74,共5页
Iron Steel Vanadium Titanium
关键词
烧结
燃料
氮氧化物
排放浓度
工艺参数
配矿
sintering
fuel
nitrogen oxides
emission concentration
processing parameters
ore proportioning
作者简介
刘东辉(1987—)男,河北承德人,博士后,主要从事炼铁理论与冶金环保研究,E-mail:17801035953@163.com。;通讯作者:李俊华(1970—)男,河南安阳人,教授,主要从事大气污染物管控与治理技术研究,E-mail:lijunhua@tsinghua.edu.cn。
