煤焦还原法脱硝技术研究  

Study on denitration technology of coal char reduction method

作　　者：付文杰[1] 柴彤 徐明明[1] 郝京华[1] 赵瑞红[1] FU Wenjie;CHAI Tong;XU Mingming;HAO Jinghua;ZHAO Ruihong(School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018,China)

机构地区：[1]河北科技大学化学与制药工程学院,河北石家庄050018

出　　处：《河北科技大学学报》2016年第3期255-261,共7页Journal of Hebei University of Science and Technology

基　　金：国家自然科学基金(21206030)

摘　　要：为了更有效地控制燃煤烟气中NO的排放，通过模拟工业锅炉燃煤烟气，在固定床反应器中进行脱硝反应，研究了煤焦种类、反应条件、烟气成分等因素对NO转化率的影响。结果表明：在所考察的3种煤焦中，工业兰炭适合作为实验煤焦，其粒径为0.6～1.0mm较为适宜；随着温度的增加，NO转化率逐渐增加，在温度为700°C、空速为10000tT1的条件下，NO转化率可达99%;随着空速的增加，NO转化率逐渐减少，但在700°C时空速变化对NO转化率没有影响；在无氧条件下，NO浓度变化对NO转化率没有影响；相同温度下，有氧存在时NO转化率较无氧时NO转化率高，〇2浓度达4%(体积分数）时NO转化率最高；在有氧条件下，S02和C02的浓度变化对NO转化率没有影响。In order to more effectively control NO emissions in coal-fired flue gas? the denitration reaction is carried out with simulated industrial boiler flue gas in a fixed bed reactor. The influence of char types, reaction conditions, the composition of flue gas and other factors on the conversion rate of NO are discussed. The result shows that the industrial semi-coke is the most suitable experimental coal in the three coals studied, and the industrial semi-coke particle size of 0. 6 ?1. 0 mm is relatively suitable; The conversion rate of NO increases gradually with the increase of temperature, and when the reaction temperature is 700 °C and the space velocity is 10 000 h 1,the conversion rate of NO can reach 99% ; the conversion rate of NO decreases gradually as airspeed increases, but the airspeed change has no effect on the conversion rate of NO at 700 °C ; under anaerobic conditions ? the change of NO concentration has no effect on the conversion rate of NO; at the same temperature? NO conversion rate is higher at the presence of oxygen compared with that at anaerobic situation, and the conversion rate of NO is the highest when 0 2 concentration is 4% ; under aerobic conditions, the concentration change of S〇2 and CO2 has no effect on the conversion rate of NO.

关 键 词：煤化学工程 煤焦 氮氧化物 转化率 脱硝 

分 类 号：TQ536.9[化学工程—煤化学工程]