SOFA投运方式对炉内脱硝过程影响的数值研究.pdf

兔魚ww. XHOI ILL Con
第6期
锅炉制造
2015年11月
BOILER MANUFACTURING
Nov.2015
SOFA投运方式对炉內脱硝过程影响的数值研究
刘沛奇,刘博',何胜,曹庆喜2
(1.华电电力科学研究院,浙江杭州310030;2.哈尔滨エ业大学,黑龙江哈尔滨150001)
摘要:SOFA(分离燃尽风)投运方式是决定燃尽风技术降低NOx排放浓度的关键因素。以某电厂四角切圆
锅炉为研究对象,应用 Fluent i软件研究SOFA投运方式对炉内脱硝过程的影响。结果表明:停运下层燃尽风
加深轴向空气分级程度,能够有效减少燃烧过程NOx的产生量,为SNCR(选择性非催化还原)过程提供较低
的入口NOx浓度,有效降低NOκ和NH3的排放,减少还原剂消耗,实现机组的经济环保运行。喷枪布置在折
焰角下方后墙位置易造成氨逃逸引起二次污染和腐蚀水冷壁,影响机组安全稳定运行。
关键词:SOFA投运方式;炉内脱硝;SNCR;数值模拟
中图分类号::X701文献标识码:A文章编号:CN23-1249(2015)06-0047-04
Numerical Study on Impact of the SOFA Operating Mode On
Furnace Denitration Process
Liu Peigi, Liu Bo, He Sheng Cao Qingxi
(1. Huadian Electric Power Research Institute Thermal Power Research Institute, Hangzhou 310030, China
2. Harbin Institute of Technology Energy Science and Engineering, Harbin, 150001, China
Abstract: The SOFA operating mod is regarded as the key factor to lower the Nox emissions concen-
tration by using the SOFA technology. Tangentially boiler of a power plant for the study, the effect of
SOFA operating mode on furnace denitration process by using of Fluent software was researched. Shut
down the lower burning wind and deepen the axial air classification. It can effectively reduce dis
charge of NOX combustion process to provides a lower inlet Nox concentration for the SNCR process
selective catalytic reduction Emissions of Nox and NH3 and reductant consumptionwere reduced
effectively. It realized economic and environmental protection operation of the unit. Fold the bottom
corner position flame back wall arrangement gun, could easily lead to secondary pollution caused by
ammonia slip and easily corrode Wall, affect the safe and stable operation of the unit. Spray gun was
set in the position of back-wall blow flame angle. It is easy to cause secondary pollution and corro-
sion of water wall and influence the safe and stable operation of unit
Key words: SOFA operating mod furnace denitration process; SNCR; numerical simulation
对现役中小型电站锅炉普遍采用的低氮燃烧
技术23与SNCR技术联合应用进行数值模
氮氧化物(NOx)作为主要的大气污染拟研究,分析燃尽风的投运方对炉内燃烧过
物之一,我国近年出台了一系列文件限制程的组分分布的影响,及对SNCR过程的影
NOx排放,对已安装SNCR装置的燃煤电厂脱响,为实现“超净排放”所实施改造提供技术
硝改造技术路线选择提出了新要求,本文针参考。
收稿日期:2015-08-29
作者简介:刘沛奇(1987-),男,汉族,黑龙江绥化人,硬士,助理工程师