温度对超细煤粉再燃降低NO排放的影响  

Effect of Temperature on Reduction of NO by Reburning of Micro-Pulverized Coal

作　　者：赵莉[1] 阎维平[1] 刘忠[1] 高正阳[1] 

机构地区：[1]华北电力大学,保定071003

出　　处：《动力工程》2005年第6期887-890,共4页Power Engineering

基　　金：国家电力公司科技攻关资助项目(KJ000-02-16-03);博士教师基金项目

摘　　要：超细煤粉再燃技术是控制燃煤电站NOx排放的有效方法之一。以3种煤的超细煤粉作为再燃燃料,用N2、O2、CO2、NO配制模拟烟气,在立式管携带炉中,研究了温度对再燃降低NO排放的影响。结果表明,在实验温度范围内,随着再燃区温度的增加,再燃还原NO的效果增大;对于挥发份含量较高的超细煤粉,再燃还原NO的效果受温度的影响更大;对于同一煤种,再燃还原NO的效果受温度的影响随再燃料比增加而增大。采用化学动力学理论对这种影响机制进行了分析。Rebuming of micro-pulverized coal is one of the effective ways to control the emission of NOx in coal firing power plants. The influence of temperature on reducing NOx by rebuming has been studied in an experimental entraining flow reactor with 3 kinds of coal in the micro-pulverized state with and suitably mixed N2, O2, and N2 serving as the simulated flue gas. Results show that, within the temperature range tested, the efficiency of NO, reduction by rebuming increases with the rebuming zone＇ s temperature and markedly more pronounced for micro-pulverized coal with high volatile content. For the same kind of coal, the effect of temperature on NO, reduction gets more pronounced with increasing rebuming fuel fraction. The influencing mechanism is being analyzed by the chemical kinetic theory. Figs 2, table 1 and refs 6.

关 键 词：环境工程学 超细煤粉 再燃 试验 NO 温度 

分 类 号：TK12[动力工程及工程热物理—工程热物理]