烧结机风箱中烟气排放规律及分析
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摘要
为了研究烧结机各个风箱中烟气的变化规律,选择某400m2烧结机为研究对象,通过使用不同的烟气分析仪器对烧结机48个风箱中的烟气进行检测,得出了大型烧结机不同风箱中烟气温度、负压、流速、烟气成分(包括氧气、二氧化硫、一氧化碳、氮氧化物)等的变化规律;将烧结过程的料层分为6个状态,结合料层状态和风箱烟气参数分析了不同风箱对应的料层状态,解析了各个风箱烟气参数变化与料层状态的关联性和各个参数之间的相关性。可以得出,烟气的负压与流速的变化正相关;烟气温度与二氧化硫质量浓度变化趋势一致;氧气体积分数与一氧化碳、氮氧化物质量浓度变化呈现负相关趋势;一氧化碳和氮氧化物质量浓度变化一致;不同风箱烟气参数变化与风箱对应的烧结料层状态密切相关。
In order to study the variation law of the flue gas in the sinter wind boxes,a 400 m~2 sinter was selected as the research object.The flue gas in 48 wind boxes of the sinter was detected by different flue gas analysis instruments.Variation laws of the flue gas temperature,the negative pressure,the flow velocity,the composition(including oxygen,sulfur dioxide,carbon monoxide,nitrogen oxides)of different wind boxes were obtained.In the sintering process,the material layer was divided into six states.The states of the material layer corresponding to the different wind boxes were analyzed by combining the material layer states and the wind boxes flue gas parameters.Then,the correlation between the flue gas parameters of each wind box and the material layer states and the correlation among the parameters were analyzed.The conclusions are as follows:the negative pressure of the flue gas was positively correlated with the change of the flow velocity;the trend of the temperature was consistent with the sulfur dioxide mass concentration;the change of the oxygen volume concentration was negatively correlated with the carbon monoxide and the nitrogen oxide mass concentration;the variations of carbon monoxide mass concentration and nitrogen oxide mass concentration were same;the variation of flue gas parameters of different wind boxes was related to the state of sintered material layer corresponding to the wind boxes.
In order to study the variation law of the flue gas in the sinter wind boxes,a 400 m~2 sinter was selected as the research object.The flue gas in 48 wind boxes of the sinter was detected by different flue gas analysis instruments.Variation laws of the flue gas temperature,the negative pressure,the flow velocity,the composition(including oxygen,sulfur dioxide,carbon monoxide,nitrogen oxides)of different wind boxes were obtained.In the sintering process,the material layer was divided into six states.The states of the material layer corresponding to the different wind boxes were analyzed by combining the material layer states and the wind boxes flue gas parameters.Then,the correlation between the flue gas parameters of each wind box and the material layer states and the correlation among the parameters were analyzed.The conclusions are as follows:the negative pressure of the flue gas was positively correlated with the change of the flow velocity;the trend of the temperature was consistent with the sulfur dioxide mass concentration;the change of the oxygen volume concentration was negatively correlated with the carbon monoxide and the nitrogen oxide mass concentration;the variations of carbon monoxide mass concentration and nitrogen oxide mass concentration were same;the variation of flue gas parameters of different wind boxes was related to the state of sintered material layer corresponding to the wind boxes.
引文
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[17]吴胜利,张永忠,苏博,等.影响烧结工艺过程NOx排放质量浓度的主要因素解析[J].工程科学学报,2017,39(5):693.(WU Sheng-li,ZHANG Yong-zhong,SU Bo,et al.Analysis of main factors affecting NOx emissions in sintering process[J].Chinese Journal of Engineering,2017,39(5):693.)
[18]ZHOU Hao,ZHOU Ming-xi,LIU Zi-hao,et al.Modeling NOxemission of coke combustion in iron ore sintering process and its experimental validation[J].Fuel,2016(179):322.
[19]刘瑞鹏.铁矿石烧结过程中的氮氧化物排放规律及其影响因素试验研究[D].杭州:浙江大学,2015.(LIU Rui-peng.Experimental Study on Nitrogen Oxide Emissions and Its Factors during Iron Ore Sintering[D].Hangzhou:Zhejiang University,2015.)
[20]CHEN Yan-guang,GUO Zhan-chen,WANG Zhi,et al.NOx reduction in the sintering process[J].International Journal of Minerals Metallurgy and Materials,2009,16(2):143.
[2]朱廷钰,李玉然.烧结烟气排放控制技术及工程应用[M].北京:冶金工业出版社,2015.(ZHU Ting-yu,LI Yu-ran.Emission Control Technologies and Engineering Applications for Sintering Flue Gas[M].Beijing:Metallurgical Industry Press,2015.)
[3]阮志勇.铁矿烧结烟气氧化-氨法协同脱硫脱硝[J].中国冶金,2018,28(5):72.(RUAN Zhi-yong.Simultaneously desulfurization and denitration of iron ore sintering flue gas based on pre-oxidized and ammonia process[J].China Metallurgy,2018,28(5):72.)
[4]阮志勇.柳钢烧结烟气氨法脱硫体系脱硝机理[J].中国冶金,2018,28(1):61.(RUAN Zhi-yong.Denitration mechanism of ammonia desulfurization process for sintering flue gas in Liusteel[J].China Metallurgy,2018,28(1):61.)
[5]于恒.铁矿烧结烟气循环中SO2和NOx过程控制与节能减排的协同优化[D].沈阳:东北大学,2016.(YU Heng.Cooperative Optimization of Flue Gas Recycling in Iron Ore Sintering for Energy Saving and Emissions Reduction with Process Control of SO2and NOx[D].Shenyang:Northeastern University,2016.)
[6]潘建.铁矿烧结烟气减量排放基础理论与工艺研究[D].长沙:中南大学,2007.(PAN Jian.Theoretical and Process Studies of the Abatement of Flue Gas Emissions during Iron Ore Sintering[D].Changsha:Central South University,2007.)
[7]QIE Jun-mao,ZHANG Chun-xia,LI Xiu-ping,et al.Lower SO2emissions in the sintering process utilizing the difference of sulphur contents of iron ores[J].ISIJ International,2017,57(12):2118.
[8]史夏逸,周向,朱繁,等.烧结烟气SCR脱硝反应器流场模拟与设计优化[J].中国冶金,2018,28(1):66.(SHI Xia-yi,ZHOU Xiang,ZHU Fan,et al.Numerical simulation and optimization for flow field in SCR denitrification reactor for sintering gas[J].China Metallurgy,2018,28(1):66.)
[9]闫武装,谢桂龙,周景伟,等.低温氧化法用于烧结烟气脱硝的可行性探析[J].中国冶金,2018,28(5):1.(YAN Wuzhuang,XIE Gui-long,ZHOU Jing-wei,et al.Feasibility analysis of applying low temperature oxidation technology to sintering flue gas denitration[J].China Metallurgy,2018,28(5):1.)
[10]史夏逸,董艳苹,崔岩.烧结烟气脱硝技术分析及比较[J].中国冶金,2017,27(8):56.(SHI Xia-yi,DONG Yan-ping,CUIYan.Analysis and comparison of sintering gas denitrification technology[J].China Metallurgy,2017,27(8):56.)
[11]吴胜利,陈东峰,赵成显,等.不同料层高度烧结过程尾气排放规律[J].北京科技大学学报,2010,32(2):164.(WUSheng-li,CHEN Dong-feng,ZHAO Cheng-xian,et al.Exhaust emission law at different bed depths in sintering process[J].Journal of University of Science and Technology Beijing,2010,32(2):164.)
[12]朱廷钰,刘青,李玉然,等.钢铁烧结烟气多污染物的排放特征及控制技术[J].科技导报,2014,32(33):51.(ZHU Tingyu,LIU Qing,LI Yu-ran,et al.Emission characteristics of multiple pollutants from iron-steel sintering flue gas and review of control technologies[J].Science and Technology Review,2014,32(33):51.)
[13]龙红明,张向阳,李家新,等.铁矿烧结过程SO2的排放特性及过程脱硫的可行性研究[J].过程工程学报,2015,15(2):230.(LONG Hong-ming,ZHANG Xiang-yang,LI Jia-xin,et al.Study on emission characteristics of SO2and feasibility of desulfurization in iron ore sintering process[J].The Chinese Journal of Process Engineering,2015,15(2):230.)
[14]朱德庆,何奥平,潘建,等.铁矿烧结过程温室气体COx排放规律的研究[J].钢铁,2006,41(2):76.(ZHU De-qing,HEAo-ping,PAN Jian,et al.Rule of greenhouse gas COxemission in iron ore sintering process[J].Iron and Steel,2006,41(2):76.)
[15]GAN Min,FAN Xiao-hui,LWei,et al.Fuel pre-granulation for reducing NOxemissions from the iron ore sintering process[J].Powder Technology,2016(301):478.
[16]任忠培,朱天乐,朱廷钰,等.烧结过程NOx和SO2形成规律及烧结料组成对NOx排放的影响[J].环境科学,2014,35(10):3669.(REN Zhong-pei,ZHU Tian-le,ZHU Ting-yu,et al.NOxand SO2formation in the sintering process and influence of sintering material composition on NOxemissions[J].Environmental Science,2014,35(10):3669.
[17]吴胜利,张永忠,苏博,等.影响烧结工艺过程NOx排放质量浓度的主要因素解析[J].工程科学学报,2017,39(5):693.(WU Sheng-li,ZHANG Yong-zhong,SU Bo,et al.Analysis of main factors affecting NOx emissions in sintering process[J].Chinese Journal of Engineering,2017,39(5):693.)
[18]ZHOU Hao,ZHOU Ming-xi,LIU Zi-hao,et al.Modeling NOxemission of coke combustion in iron ore sintering process and its experimental validation[J].Fuel,2016(179):322.
[19]刘瑞鹏.铁矿石烧结过程中的氮氧化物排放规律及其影响因素试验研究[D].杭州:浙江大学,2015.(LIU Rui-peng.Experimental Study on Nitrogen Oxide Emissions and Its Factors during Iron Ore Sintering[D].Hangzhou:Zhejiang University,2015.)
[20]CHEN Yan-guang,GUO Zhan-chen,WANG Zhi,et al.NOx reduction in the sintering process[J].International Journal of Minerals Metallurgy and Materials,2009,16(2):143.