摘要
针对某超超临界锅炉主蒸汽和再热蒸汽温度偏低等问题,对燃烧器进行了技术改造,并通过试验验证了改造效果。结果表明,采用水平浓淡燃烧器后,浓淡比为1.5~1.6,负荷条件为330 MW时,主蒸汽温度可由570℃提高到585℃,再热蒸汽温度则由562℃提高到578℃,对应的末级过热器壁面最高温度下降5℃,飞灰可燃物的质量分数由3.2%下降至2.1%;负荷条件为500MW及660MW时,飞灰可燃物的质量分数均有不同程度的降低;NO_(x)的质量浓度较改造前呈现下降趋势;锅炉在40%额定负荷工况下的稳燃情况可达预期效果。
In order to deal with the problems that the main steam and reheat steam temperatures are comparatively lower in the ultra-supercritical boiler,the burners are reformed and the reconstruction effect is verified by experiments.The results show that after the burners with horizontal density-dilution separators are employed,when the ratio of density to dilution is 1.5~1.6,and the load is300 MW,the main steam temperature can increase from 570 ℃to 585℃ and the reheat steam temperature can increase from 562 ℃to 578 ℃.The maximum wall temperature of the corresponding last stage superheater falls by 5 ℃,and the combustible content in fly ash decreases from 3.2% to 2.1%.When the load is 500 MW or 660 MW,the combustible content also falls in different degrees.The concentration of NOx is lower than that before transformation,and the stable combustion of the boiler under the condition of 40% rated load can help to achieve the desired effect.
作者
康晓光
KANG Xiaoguang(Gujiao Xishan Power Generation Co,Ltd,Gujiao,Shanxi 030206,China)
出处
《山西电力》
2021年第3期70-72,共3页
Shanxi Electric Power
关键词
超超临界锅炉
燃烧器
技术改造
浓淡比
ultra-supercritical boiler
burner
technical reconstruction
density-dilution ratio
