炼焦过程中多环芳烃与NO_x产生的相关性  

EMITTING RELATIVITY OF POLYCYLIC AROMATIC HYDROCARBONS AND NO_x IN COKING

作　　者：李恩科[1,2] 程相利[1] 苍大强[1] 石焱[3,4] 李茂静[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]唐山市环境监测中心站,河北唐山063000 [3]河北理工大学冶金与能源学院,河北唐山063009 [4]教授

出　　处：《煤炭转化》2009年第4期66-69,共4页Coal Conversion

基　　金：长江学者和创新团队发展计划项目(IRTO708)

摘　　要：通过对炼焦过程产生的多环芳烃(PAHs)和NOx浓度进行监测,得到PAHs和NOx的产生规律及其产生的相关性.结果显示,PAHs主要在煤的升温阶段产生,在结焦初期的1h～3h产生的多环芳烃最多,整个炼焦过程中的产生量逐渐减少;随炼焦时间延长,NOx浓度先增大后减小,在最初的第4h～第6h出现峰值;在炼焦过程前期,PAHs和NOx的产生量呈负相关性,通过指数拟合,得到不同煤种和配煤情况下PAHs与NOx最大产生量的关系式.The generation chatacteristic and the relativity of polycyclic aromatic hydrocar- bons（PAHs） and nitrogen oxide（NO.） were obtained by monitoring their generation in coking. The results show that the amount of PAHs mainly generated at the stage of coal temperature in- creasing is the maximum at the beginning 1 h-3 h of coking and is gradually reduced in the whole coking process. With the time prolonging the amount of NO~ generated which peak value oc- curred at the stage from the fourth h to the sixth h is increased firstly and then reduced. The a- mounts of PAHs and NO~ generated at the beginning stage have a negtive correlation and the re- lation of maximum amounts between PAHs and NOx for different coals and different blended coals was obtained by fitting an exponential curve.

关 键 词：炼焦 PAHS NOx 相关性 

分 类 号：TQ520.6[化学工程—煤化学工程]