第 33 卷第 1 期 辽宁工程技术大学学报(自然科学版) 2014年 1 月
Vo l . 3 3
No.1 Journal of Liaoning Technical University(Natural Science) Jan. 2014
收稿日期:2013-09-05
作者简介:王为术(1972-),男,重庆 开县人,教授,博士,主要从事多相传热与流动方面的研究. 本文编校:史庆华
文章编号:1008-0562(2014)01-0099-04 doi:10.3969/j.issn.1008-0562.2014.01.020
350 MW 超临界四角切圆锅炉燃烧数值模拟
王为术
1
,常娜娜
1
,刘 军
2
,王保文
1
,王纪宏
3
,张雨飞
1
(1.华北水利水电大学 电力学院,河南 郑州 450011;2.浙江大学 清洁能源国家重点实验室,浙江 杭州 310027;
3.大唐林州热电有限责任公司,河南 林州 730332)
摘 要:为研究 350 MW 超临界热电联产四角切圆煤粉锅炉的炉内燃烧问题,基于 Fluent6.3 模拟软件,分析了
炉内的温度和组分分布特性.结果表明:BMCR 工况下温度在炉膛燃烧器区横截面上,低温区出现在炉膛中心,
在炉壁附近出现局部高温.在炉膛中心纵截面,沿高度、温度呈先上升后下降分布,出口温度为 1 138.11 K;炉 内
O
2
组分沿高度上升,CO 组分先上升后下降,CO
2
组分先下降后上升.研究结果为超临界锅炉运行监测提供了可
靠的理论依据.
关键词:超临界锅炉;燃烧;数值模拟;Fluent6.3;模拟软件;分布特征
中图分类号:TH 69 文献标志码:A
Study on coal combustion characteristics in a 350MW
supercritical tangentially boiler
WANG Weishu
1
, CHANG Nana
1
, LIU Jun
3
, WANG Baowen
1
, WANG Jihong
2
, ZHANG Yufei
1
(1. Thermal Engineering Research Center, North China University of Water Resources and Electric Power,
Zhengzhou 4500011, China; 2.Linzhou thermal power Co., Ltd of Datang. Linzhou 455561, China; 3.State Key
Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, Zhejiang, P. R. 310027 ,China)
Abstract: The combustion characteristics in the furnace of 350MW supercritical combined heat and power
generation tangentially boiler were numerically simulated by Fluent6.3. The temperature field and species fields
were studied. The results indicate that on the cross section of the burner area in the furnace, the low temperature
zone appears in the furnace’s center region of the cross section under the BMCR working condition, and the local
high temperature happens near the furnace wall under the BMCR working condition. In the center longitudinal
cross section of the furnace, the center temperature firstly increases with the furnace elevation increase, and then
decreases. And the temperature is 1138K at the furnace outlet. The mass fraction of O
2
increases with the furnace
elevation increase. With increase of the furnace elevation, the mass fraction of CO firstly increases with the
furnace elevation, and then decreases. Instead, the mass fraction of CO
2
firstly decreases, and then increases.
These results provide reliable theory basis for the engineering design and operational monitoring of supercritical
pressure boilers.
Key words: supercritical boiler; combustion; numerical simulation
0 引 言
切圆燃烧广泛应用于电站煤粉锅炉,四角切圆
锅炉炉内风粉混合均匀,燃烧稳定,炉膛四周热负
荷分布偏差小,燃烧适应性好.但实践表明切圆燃烧
锅炉存在烟气参数场偏置,造成横向两侧过大的烟
温差,致使爆管,危及锅炉安全.现代大型电站锅炉
燃用煤种普遍严重偏离设计煤种,低反应性煤切圆
燃烧锅炉火焰偏斜,炉内结渣,N/S 污染物释放和
CO
2
排放
[1]
倍受关注.国内外学者常以试验、理论和
数值方法对切圆燃煤锅炉进行研究.由长福
[2]
采用
LDA 试验确定了切圆燃烧炉内定量化流动特征.燃
烧试验研究成本高、难度大,随着计算技术的发展,