垃圾焚烧炉后拱高度的数值模拟  

Numerical Simulation of Rear Arch Height in Municipal Solid Waste Incinerator

作　　者：段翠九[1,2] 曾纪进 陈雷 张衍国[2] 

机构地区：[1]福建省丰泉环保控股有限公司,福建福州350007 [2]清华大学热能工程系,北京100084 [3]中德(中国)环保有限公司,北京100142

出　　处：《工业炉》2015年第1期14-16,共3页Industrial Furnace

摘　　要：后拱高度是影响垃圾焚烧炉内燃烧和流动的关键因素之一。采用Fluent作为工具,通过模拟计算得到后拱高度变化对炉膛内流场的影响。计算结果显示,随后拱高度增加,前拱下方处的涡流强度先增加,涡流强度越大越有利于前拱处入炉垃圾的干燥和热解,但当后拱高度达到一定值后,随后拱高度增加,前拱下方处涡流强度开始减弱,直至涡流完全消失,对垃圾的焚烧产生不利影响。在垃圾焚烧炉设计中,选择适当后拱高度非常重要,它直接影响垃圾的燃烧效率。The rear arch height is one of the key factors influencing the combustion and flow field in municipal solid waste incinerator. Using the Fluent as a tool, the change of rear arch height which affects the flow field is calculated. The results show that with the rear arch height increasing, the vortex intensity becomes stronger under front arch. It is good for drying and pyrolysis of waste. When the rear arch higher achieves a certain value, the vortex intensity under front arch decreases with the rear arch higher until it completely disappears. It has a negative impact on the waste combustion. It is important to select the appropriate rear arch height during the process of designing the municipal solid waste incinerator, and it affects directly the combustion efficiencv of municipal solid waste.

关 键 词：垃圾焚烧炉 后拱高度 流场 涡流 数值模拟 

分 类 号：X705[环境科学与工程—环境工程]