神华煤锅炉低氮燃烧特性研究

神华煤极易着火、燃尽,燃烧性能优良,且煤中氮、硫含量低,使神华煤在低氧和低氮结合的燃烧条件下,保持了较高的燃尽性能和较一般烟煤偏低的NOx生成量。神华煤的低硫特性保证了在贫氧(没有足够的氧气保证充分燃烧)条件下,炉内H2S含量不是太高,没有明显的高温腐蚀倾向。采用低氮燃烧后,燃烧器区燃烧强度降低,缓解了炉内结渣,部分锅炉屏区的结渣也有所缓解,提高了具有严重结渣倾向的神华煤的掺烧比例。神华煤采用低氧燃烧和低氮燃烧相结合的技术,保证了锅炉的燃烧经济性、安全性和低NOx生成特性,指标明显优于国内其他典型烟煤。

Combustion characteristics of Shenhua coal boiler under low NO x combustion

The ignition and burn-out properties of Shenhua coal are very well , and its nitrogen and sulfur content is very low, which al-lows the Shenhua coal boiler use low oxygen and large-scale low NOx combustion techniques to obtain high economic benefits and to make low NOx emission. The low content of sulfur characteristic of Shenhua coal can make sure that the H2 S content is not high and there is no obvious high temperature corrosion tendencies in the boilers under hypoxic conditions. Under low NOx combustion, the combustion intensi-ty of the burners zone can be reduced, the slagging in the boiler can be alleviated, and the blending proportion of Shenhua coal is in-creased. Some boilers can use total Shenhua coal while they could not before. Using low oxygen technique combined with low NOx combus-tion technology can make sure that the Shenhua coal boiler has better economy and security, and lower NOx emission than other typical bi-tumite boilers. The research shows the advantages of Shenhua coal and also provide technology support for Shenhua coal boilers under low NOx combustion in domestic.