流化床中燃烧高水高氮酒糟的NO排放特性  

NO emission from burning distilled spirit lees with high contents of moisture and nitrogen in fluidized bed

作　　者：刘欢[1,2] 崔丽杰[2] 朱传强 曾玺[1] 高士秋[1] 许光文[1] 

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190 [2]中国科学院大学化学与化工学院,北京100049

出　　处：《化工学报》2015年第7期2694-2701,共8页CIESC Journal

基　　金：国家自然科学基金项目(21161140329);国家科技支撑计划项目(2012BAC03B05)~~

摘　　要：采用流化床反应器,研究富水蒸气条件下酒糟燃烧的NO排放特性。结果表明,增加过量空气系数和升高燃烧温度,NO排放浓度升高;对送入燃烧反应器的气体中添加水蒸气模拟高水分燃料燃烧有效地降低了酒糟燃烧的NO排放浓度及总排放量,且在适当条件下可减少NO排放约46%(质量)。酒糟灰分中的金属氧化物对NO的还原有催化作用,且随着温度的升高变强。在含H2或CO的N2气氛中,灰分对NO催化还原作用更明显。水蒸气本身对NO没有明显还原作用,说明水蒸气是通过与碳氢化合物反应生成还原性气体,如H2和CO,从而在酒糟灰催化作用下强化NO的还原。This study was devoted to investigating the NO emission from combusting distilled spirit lees with high contents of moisture and nitrogen in a laboratory fluidized bed. The results showed that the NO emission increased with increasing excess air ratio and combustion temperature. The addition of extra water vapor into the combustion atmosphere for simulating the combustion of high-moisture fuel effectively decreased the NO emission, and about 46% （mass） of NO emission was reduced under appropriate conditions. In the N2-base atmosphere containing CO or H2, the metallic oxides containing in the ash of distilled spirit lees showed obvious catalytic activity on the reduction of NO, and the catalytic activity increased with increasing temperature. Water vapor in itself had not detective effect on reduction of NO, showing that its reduction of NO into N2 would be implemented through its reactions with hydrocarbons to generate reductive gases such as H2 and CO under the catalytic effect of ash.

关 键 词：酒糟 流化床 燃烧 NO排放浓度 高含水燃料 高含氮燃料 

分 类 号：TQ523.3[化学工程—煤化学工程]