摘要
为探究声波助燃技术在W型火焰锅炉中的应用潜力,试验研究了实时负荷为315 MW的W型火焰锅炉在声波激励作用下的燃烧特性。在锅炉主燃区、燃尽区分别交错布置12台和4台声波激励装置,每3台1组循环投运,驱动声波激励装置工作的电机频率为35 Hz,相应进气压力维持在0.35~0.47 MPa。试验中,通过电厂集控室集散控制系统(DCS)监测记录了脱硝塔A/B侧进口NO_(x)质量浓度、脱硫装置进口SO_(x)质量浓度和机组煤耗的变化。结果表明:投入声波激励装置后,脱硝塔A/B侧进口NO_(x)质量浓度分别下降了6.08%、5.47%,SO_(x)质量浓度下降了1.24%,机组平均煤耗下降了1.5 g/(kW·h);对省煤器和空气预热器出口的灰分采样分析发现,与无声波激励的情况相比,飞灰含碳质量分数分别下降了1.64%和1.70%,声波助燃技术能有效提高W型火焰锅炉的热效率和降低污染物排放。
To explore the application potential of sound-assisted combustion technology in W-shaped flame boilers,the combustion characteristics of a W-shaped flame boiler with real-time load of 315 MW under acoustic excitation were experimentally studied.Twelve and four acoustic excitation devices were staggered in the main combustion area and the burning area of the boiler,respectively,and they were put into operation in a group of three devices in a circular manner.The frequency of the motor driving the acoustic excitation device was 35 Hz,and the corresponding intake pressure was maintained at 0.35-0.47 MPa.In the test,the changes of the NO_(x)mass concentration at the inlet of the A and B sides of the denitration tower,the SO_(x)mass concentration at the inlet of the desulfurization unit,and the coal consumption of the unit were recorded through the distributed control system(DCS)of the centralized control room of the power plant.Results showed that,after the acoustic excitation was put into the denitrification tower,the mass concentration of NO_(x)at the inlet of the A and B sides of the denitration tower is decreased by 6.08%and 5.47%,respectively,the SO_(x)mass concentration is decreased by 1.24%,and the average coal consumption of the unit is decreased by 1.5 g/(kW·h).In addition,based on the ash sampling analysis of the economizer and air preheater outlet,it is found that the carbon mass fraction of fly ash is decreased by 1.64%and 1.70%respectively,compared with the case without acoustic excitation.Sound-assisted combustion technology can effectively improve the thermal efficiency of W-shaped flame boilers and reduce pollutant emissions.
作者
杨延锋
梁建国
韩峰
薛晓亮
杨洋
李新卓
YANG Yanfeng;LIANG Jianguo;HAN Feng;XUE Xiaoliang;YANG Yang;LI Xinzhuo(School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China;Yangcheng International Power Generation Co.,Ltd.,Jincheng 048100,Shanxi Province,China;Shandong Gore Environmental Technology Co.,Ltd.,Jinan 250000,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2024年第8期1163-1172,共10页
Journal of Chinese Society of Power Engineering
基金
国家自然科学青年基金资助项目(12304491)
湖南省自然科学基金资助项目(2023JJ40010)
长沙市自然科学基金资助项目(2023CSKJ017)。
关键词
声波助燃
W型火焰锅炉
煤耗
机组负荷
飞灰含碳量
sound-assisted combustion
W-shaped flame boiler
coal consumption
unit load
carbon content of fly ash
