城市生活垃圾焚烧炉深度空气分级数值模拟  

Numerical simulation of deep staged-air distribution of municipal solid waste incinerator

作　　者：宁星星[1] 马晓茜[1] 胡志锋[1] 余昭胜[1] 廖艳芬[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《环境污染与防治》2016年第10期53-60,66,共9页Environmental Pollution & Control

基　　金：国家质检公益项目(No.20140159);广东省能源高效清洁利用重点实验室项目(No.2013A061401005)

摘　　要：对广州市某台750t/d大型城市生活垃圾焚烧炉进行数值模拟优化研究,有效模拟预测城市生活垃圾焚烧炉内温度场、流场和重要组分浓度场等的分布。对100%负荷运行下的城市生活垃圾焚烧炉进行二次风与燃尽风的分级配风优化研究,模拟结果显示,在二次风与燃尽风风量比为0.65∶0.35(体积比)时,城市生活垃圾焚烧炉内二次燃烧显著,且烟气在850℃以上区域的停留时间达2s以上,满足充分分解二噁英等污染物的条件。尾部烟道出口NO_x质量浓度为250.58mg/m^3,比原始运行工况(259.01mg/m^3)降低了3.3%,是较理想的空气分级方案。Numerical simulation optimization researches of a 750 t/d municipal solid waste incinerator in Guang-zhou were carried out for effective prediction of the temperature field,flow field and important component concentration field in the incinerator. The optimization study of different staged-air distribution on 100% operational conditions showed that when the ratio of secondary air and burning wind was 0.65 ： 0.35 ,the secondary combustion inside the incinerator was very significant,and the gas residence time during the area above 850℃ had achieved to 2 s,which met the requirement of the restraint of dioxin emission. The NOx concentration of tail flue outlet was 250.58 mg/m^3 ,relatively decreased by 3.3% by comparison of the primitive condition （259.01 mg/m^3）. This operation condition was a relatively ideal staged-air distribution condition.

关 键 词：城市生活垃圾焚烧炉 数值模拟 空气分级 优化研究 二次燃烧 

分 类 号：X799.3[环境科学与工程—环境工程]