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在一热输入为0 6MW的循环流化床燃烧中试装置上进行了石油焦与煤混合燃烧和脱硫试验研究,得到燃料中石油焦与煤质量混合比、过量空气系数、床层温度、一次风率和钙硫摩尔比等参数对SO2 排放的影响规律.结果表明,混合燃料中掺焦比例越大,混合燃料的硫含量越高,SO2 排放浓度越高;纯烧石油焦时SO2 排放浓度最高.对不同配比的混合燃料,随过量空气系数、一次风率和Ca/S摩尔比增大,SO2 排放浓度降低.830~850℃的床温对脱硫最为有利,在燃用石油焦与煤2质量混合比R为1和3的混合燃料时可获得最低SO2 排放.
A coke burning and coal desulfurization experiment was conducted on a circulating fluidized bed combustion pilot plant with a heat input of 0 6MW to obtain a mixture of fuel coke and coal mass ratio, excess air ratio, bed temperature, primary air The results showed that the greater the proportion of coke mixed with fuel, the higher the sulfur content of the mixed fuel, the higher the SO2 emission concentration, and the highest concentration of SO2 emission from the pure burning petroleum coke With the different proportions of mixed fuels, with the increase of excess air ratio, primary air rate and Ca / S molar ratio, SO2 emission concentration decreased.The bed temperature of 830 ~ 850 ℃ was the most favorable for desulfurization, 2 mass mixing ratio R is 1 and 3 when the mixture of fuels to obtain the lowest emissions of SO2.