氧气对层燃条件下烟气携带煤焦还原NO的影响  

An Experimental Study on Reactions of NO and Flue Gas Carrying Char at Grate Firing Conditions

作　　者：徐力[1] 赵伟[1] 王剑[1] 刘奇[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《热能动力工程》2016年第4期100-105,149,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家科技支撑计划基金资助项目(2014BAA02B03);黑龙江省自然科学基金资助项目(E201429)

摘　　要：为探索一种实质有效的工业锅炉脱硝技术,通过在反应气氛中添加氧气,研究在程序升温实验法和恒温加热实验法中氧气对大粒径煤焦-NO反应的重要作用。程序升温实验方法是指在升温过程中全程通入反应气氛并记录煤焦-NO气相反应产物;恒温加热实验方法是指待反应区段温度稳定后通入反应气氛并记录煤焦-NO气相反应产物。结果表明:反应初期高氧浓度比低氧或无氧条件更能促进反应的进行;在较高氧浓度条件下改变实验温度对大粒径煤焦-NO反应的影响很小;经预氧化处理后,煤焦还原NO的能力有所提升。To meet the progressively more stringent environmental requirements,further reducing NO_x emission is needed. To identify an effective way of reducing NO_x emission,this paper investigated the effects of oxygen concentration and pre-oxidation treatment on char-NO reactions using tube furnace. By adding oxygen into the reacting environment,the important role of oxygen on the reaction between NO and large particle size char was studied under the condition of constant temperature heating. Results indicate that high oxygen concentrations can promote the char-NO reaction compared to the low oxygen or anaerobic conditions. With high oxygen concentration,the change of experimental temperature has little effect on char-NO reaction. After pre-oxidation treatment,however,the capacity of char on NO reduction is improved.

关 键 词：煤焦 NOx 制焦条件 氧气 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]