摘要
以生物质燃料木煤和重油混合燃烧为研究对象,利用欧拉-拉格朗日方法中的DPM模型模拟燃料颗粒运动燃烧过程,欧拉-欧拉方法中的欧拉(Eulerian)多相流模型模拟气相反应与生料分解反应,将两种模型耦合应用于分解炉的燃烧模拟中。在其他因素不变的前提下,分别对比了不同木煤掺混比例(0、15%、30%)、入口高度(11、13和15 m)和颗粒粒径(1、3和5 mm) 3种情况下,分解炉生物质燃尽率、生料分解率以及出口NO排放量。研究表明:木煤颗粒入口的合理位置应位于第一个缩口与三次风入口之间,木煤颗粒粒径和掺混比例对生料分解率的影响较小,而出口NO排放量随木煤颗粒粒径增大而增大,随木煤掺混比例的增加而降低。
In this paper,the mixed combustion of biomass fuel wood coal and heavy oil is taken as the research object.The DPM model in the Euler-Lagrang method is used to simulate the combustion process of fuel particles.The Eulerian multiphase in the Euler-Eulerian method is used.The flow model simulates the gas phase reaction and the raw meal decomposition reaction,and the two models are coupled to the combustion simulation of the decomposition furnace.Under the premise that other factors are unchanged,the effects of different proportions of wood coals(0,15%,30%),inlet height(11 m,13 m,15 m),and particle size(1 mm,3 mm,5 mm) on biomass burnout rate,raw material decomposition rate and export NO emission are investigated.The results indicate that the reasonable position of the wood coal particle inlet should be located in between the first shrinkage and the tertiary air inlet.The effect of the blending ratio on the decomposition rate of raw meal has a small decrease trend,while the NO emission increases with the particle size of wood coal,and decreases with the increase of the proportion of wood coal.
作者
毛娅
郑欢
江智
MAO Ya;ZHENG Huan;JIANG Zhi(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan,China,430070)
出处
《热能动力工程》
CAS
CSCD
北大核心
2020年第3期207-213,共7页
Journal of Engineering for Thermal Energy and Power
关键词
生物质燃料
分解炉
入口高度
粒径
biomass fuel
decomposing furnace
inlet height
particle size
