前、后拱和二次风对垃圾焚烧炉燃烧影响研究  

Study on the Influence of Arch and Secondary Air on the Combustion in a MSW Incinerator

作　　者：赖志燚[1] 马晓茜[1] 余昭胜[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《锅炉技术》2011年第4期70-74,共5页Boiler Technology

摘　　要：针对我国的垃圾成分特点,选取处理量为250 t/d的垃圾焚烧炉排炉为研究对象。在垃圾焚烧炉分区模型理论的基础上,用数值模拟的方法对前后拱及二次风布置对垃圾焚烧炉燃烧的影响进行研究。模拟结果显示,采用前后拱的炉型比单采用后拱的炉型炉内燃烧状况及温度场较优,前后拱设二次风风口,可以有效改善炉膛的气流组织,优化炉膛的燃烧状况。当第一通道前墙离垃圾入口2 m,前拱二次风风口高度为3.67 m,后拱二次风风口高度为3.75 m时,第一通道出口烟气平均温度为1 028.4℃,平均速度为8.91 m/s,CO浓度为0.244 g/m3。According to the characteristics of MSW,a incinerator,which disposes 250 tons of waste daily,is taken for study.In this paper,based on the partition model theory,numerical simulation was applied to analysis the influence when the front arch length,rear arch length and arrangement of the secondary air inlets vary.Prediction results show that the combustion condition and temperature field of the furnace type which has both front and rear arch is better than the one only has rear arch.Setting secondary air inlets in the front arch can improve the air distribution and optimize furnace combustion condition effectively.When the distance between the front wall of first gas duct and waste inlet is 2 m,secondary air inlets in the front arch is 3.67 m,secondary air inlet in the rear arch is 3.75 m,the average temperature of flue gas is 1 028.4 ℃,the average velocity is 8.91 m/s,the concentration of CO is 0.244 g/m3.

关 键 词：垃圾焚烧炉 数值模拟 前拱 后拱 二次风 

分 类 号：X705[环境科学与工程—环境工程]