Numerical modelling of a straw-fired grate boiler

被引：105
|
作者：
Kær, SK [1 ]
机构：
[1] Univ Aalborg, Inst Energy Technol, DK-9220 Aalborg O, Denmark
来源：
FUEL | 2004年 / 83卷 / 09期
关键词：
grate-fired boilers; biomass; computational fluid dynamics; mixing problems;
D O I：
10.1016/j.fuel.2003.12.003
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The paper presents a computational fluid dynamics (CFD) analysis of a 33 MW straw-fired grate boiler. Combustion on the grate plays a key-role in the analysis of these boilers and in this work a stand-alone code was used to provide inlet conditions for the CFD analysis. Model predictions were compared with available gas temperature and species concentration measurements showing good agreement. Combustion of biomass in grate-based boilers is often associated with high emission levels and relatively high amounts of unburnt carbon in the fly ash. Based on the CFD analysis, it is suggested that poor mixing in the furnace is a key issue leading to these problems. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1183 / 1190
页数：8
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