超细化煤粉在热解条件下氮的迁移特性试验研究  

A Experimental Investigation on Nitrogen Emission Properties of Micro-pulverized During Pyrolysis

作　　者：魏砾宏[1] 姜秀民[2] 张超群[2] 李润东[3] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江省哈尔滨市150001 [2]上海交通大学机械与动力工程学院,上海市闵行区200240 [3]沈阳航空工业学院清洁能源与环境工程研究所,辽宁省沈阳市110034

出　　处：《中国电机工程学报》2006年第7期62-66,共5页Proceedings of the CSEE

摘　　要：采用DTG（热重，差热分析仪）和GC-MS（气相色谱质谱联用仪）对鹤岗、铁法、准噶尔煤超细化煤粉进行热解试验，研究试验条件对氮氧化物的前驱物NH3、HCN和NO的影响。结果表明粒径小于20μm的超细煤粉含氮气体的释放量最少，而中等粒径的煤粉（30-40μm）氮化物的排放总量最大，50μm以上粒径煤粉居中；同一煤种不同粒径的煤样在热解过程中HCN的释放规律较为接近，分别在300-600℃温度范围和1000—1200℃温度范围内出现最大析出峰；随升温速率增加含氮气体的产物分布产生滞后现象；煤种对不同粒径范围的煤样含氮气体释放的影响不同，当粒径在0-10μm范围内，热解过程含氮气体释放量不与煤中含氮量成正相关，而在中等粒径范围（30-40μm范围内）则相反。The behavior of nitrogen evolution during different pyrolysis condition of coal has been investigated by combined GCMS and DTG with linear temperature programming. Three coals have been tested in this study. The results show that the evolution of volatile nitrogen is least in particle size less than 20 μm pulverized coal, the evolution of volatile nitrogen is most in middling particle size （30-40 μm）, biggish particle size is placed in the middle. The HCN evolution law have kindred character during pyrolysis of different particle size pulverized coal. most releasing peak appeared at temperatures from 300-600 ℃ and 1000-1200 ℃. The composition of gaseous N-containing compounds laged by increasing the heating rate. Kinds of different particle size coal sample influence on emission of gaseous N-containing during pyrolysis, in the particle size range of 0-10μm, the evolution of gaseous N-containing compounds out of proportion to the N content in coal, but in the middling particle size （30-40 μm） range the law in opposition to small particle size.

关 键 词：热能动力工程 超细化煤粉 热解 HCN NH3 NO 

分 类 号：TQ534[化学工程—煤化学工程]