气体再燃低NO_x排放试验研究  

EXPERIMENTAL STUDY ON LOW NO_x EMISSION USING GAS REBURNING

作　　者：张忠孝[1] 姚向东[1] 乌晓江[1] 魏华彦[1] 陶晓华[1] 朱基木[2] 

机构地区：[1]上海理工大学动力工程学院,上海市杨浦区200093 [2]宝钢发电厂,上海市宝山区200971

出　　处：《中国电机工程学报》2005年第9期99-102,共4页Proceedings of the CSEE

基　　金：国家"863"高技术基金项目(2002AA527054)~~

摘　　要：在一台具有空气分离、燃料分级燃烧等多用途的一维热态试验台上,研究了天然气再燃燃烧过程中停留时间、空气过量系数、温度、煤种等一些关键因数对NOx释放规律的影响.结果表明:提高再燃区停留时间有利于降低NOx的排放,其最佳停留时间为0.6s;再燃区过量空气系数存在一个最佳值(0.8～0.9);脱氮效率随着再燃量的增加而增大,随着再燃区温度的增加而增大;对于不同煤种,均能起到显著的降低NOx排放作用;试验室的脱氮率为70%～80%,NOx的排放浓度可在200mg/Nm3以下.The effect of some key factors such as residence time, stoichiometric coefficient, temperature and coal types on NOx formation regulation was studied on a one-dimensional test system with multi-function such as air stage and fuel reburning. The results showed that prolonging the reburn zone residence time can help to lower the NOx emission and the best time was 0.6s. There existed an optimum value (0.8-0.9) for reburn zone stoichiometric coefficient. The NOx reduction efficient increased with the increase of the reburn heat input and the reburn zone temperature. The effect on low NOx emission was remarkable to different coal types. The experimental NOx reduction rate was 70%-80%. The NOx emission concentration was below 200mg/Nm3.

关 键 词：低NOx排放 试验研究 气体再燃 燃料分级燃烧 停留时间 空气过量系数 过量空气系数 天然气再燃 空气分离 燃烧过程 释放规律 脱氮效率 排放浓度 试验台 多用途 最佳值 脱氮率 试验室 温度 煤种 增大 

分 类 号：X701.1[环境科学与工程—环境工程] TQ054[化学工程]