墙式布置燃尽风技术在320 MW四角切圆煤粉锅炉上的应用Application of Wall Arrangement SOFA Technology in 320 MW Tangentially-fired Boilers
黄权浩,孙培波,李德波
HUANG Quanhao,SUN Peibo,LI Debo
摘要(Abstract)：
以某发电厂320 MW机组四角切圆煤粉锅炉为研究对象,针对其NO_X排放浓度偏高的问题,对锅炉燃烧系统进行了改造,采用新型低氮燃烧器及在锅炉四面水冷壁上布置墙式燃尽风系统,显著降低了锅炉NO_X排放。低氮燃烧系统改造后,根据燃烧器改造后的结构特点,在机组各负荷段进行燃烧优化调整试验,试验结果表明:采用墙式燃尽风技术,通过合理配风,机组各负荷段的锅炉NO_X排放量降低48%以上。同时,相较于改造前,飞灰可燃物、排烟温度等经济指标均在一定程度上得到改善,锅炉效率提高约1.3%;另外,墙式布置燃尽风技术在解决锅炉两侧烟温、汽温偏差方面具有良好的效果。
The paper takes a 320 MW tangentially-fired boiler as a research object. On account of the high NO_Xemission, a new low-nitrogen burner and wall arrangement SOFA technology were adopted which significantly reduced the NO_Xemission of the boiler. After the transformation of the low-nitrogen combustion system,according to the characteristics of the burner after the transformation, combustion optimization adjustment test was carried out under several boiler loads, and the test results show that NO_Xemission of the boiler can be reduced by 48% or above through reasonable air distribution in each load by adopting the wall arrangement SOFA technology. At the same time, compared with the condition before the transformation, economic indicators such as combustibles in fly ash, outlet gas temperature are all reduced to a certain extent, and the boiler efficiency is improved by about 1.3%. In addition, the wall arrangement SOFA technology has a good effect in solving the deviation of boiler exit gas temperature and steam temperature on both sides of the boiler.
关键词(KeyWords)：
四角切圆;墙式燃尽风;NO_X;燃烧优化调整;锅炉效率;偏差
tangential;wall arrangement SOFA;NO_X;combustion optimization adjustment;boiler efficiency;deviation
基金项目(Foundation):
作者(Author):
黄权浩,孙培波,李德波
HUANG Quanhao,SUN Peibo,LI Debo
DOI: 10.19585/j.zjdl.201905017
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