文献类型：期刊文献

中文题名：垃圾焚烧炉炉拱改造与燃烧优化的数值模拟

英文题名：Numerical simulation of combustion and arch structure in MSW incinerator

作者：李秋华[1];夏梓洪[1];陈彩霞[1];张小可[2]

机构：[1]华东理工大学资源与环境工程学院,上海200237;[2]上海环境集团,上海200040

年份：2012

卷号：6

期号：11

起止页码：4191

中文期刊名：环境工程学报

外文期刊名：Chinese Journal of Environmental Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目(20876049);上海市科委资助项目(10DZ1200105)

语种：中文

中文关键词：垃圾焚烧炉;燃烧;炉拱;挡板;数值模拟

外文关键词：waste incinerator; combustion; furnace arch; deflector; numerical simulation

摘要：炉排式垃圾焚烧炉在处理比设计水分高、热值低的垃圾时,容易出现着火位置滞后、垃圾"烧不透"、残炭含量高等问题。采用FLIC软件的床层模型和商业软件FLUENT,对焚烧炉炉排和炉膛燃烧过程进行了模拟计算。结合某城市生活垃圾焚烧炉存在的燃烧不完全问题,通过一系列的数值实验,探索后拱高度和挡板的有无对燃烧过程的影响。比较了炉拱辐射强度、挥发分质量分数、温度沿炉排长度方向的分布以及炉膛内的速度矢量图。结果表明,降低后拱高度或增加挡板均可使着火位置有不同程度的前移;同时降低炉拱高度和增加挡板可使着火位置前移约1.1 m,提前进入稳定燃烧阶段。
The phenomena of ignition delay,incomplete combustion and high carbon content in residual ash are common problems encountered in incinerators burning high moisture wastes.In order to solve these problems,a coupling approach of FLIC and FLUENT was applied in the simulation of in-bed combustion and out-of-bed burnout.The impact of rear furnace arch height and deflector on the burnout characteristics was investigated by a series of numerical simulations,and improved designs were proposed.The comparison of radiation intensity from the furnace arch,mass fraction of volatiles and temperature along the direction of grate length and the velocity vector diagram,between the original design and the new scheme of furnace arch and deflector,was performed.It comes to the conclusion that either reducing the rear arch height or using deflector can put the ignition distance forward.With the methods mentioned above,the result shows that the distance of ignition is shortened by 1.1 m.