【摘要】 采用三种高硫煤 ,在固定床反应器中考察了原煤在空气、空气水蒸气和空气氮气气氛下低温氧化预脱硫过程的影响因素 ,包括煤种 (总硫含量、形态硫分布和挥发分含量 )和化学反应条件 (温度、停留时间 )。脱硫前后的样品中硫及硫形态、热值、工业分析和元素分析依据国标进行测定。实验结果表明硫及碳质的氧化在开始阶段以不同的速率析出 ,随后反应中差别减小 ;黄铁矿硫可得到高的脱除率 ;水蒸气适当比例的加入可以增加黄铁矿的脱除 ,同时降低碳的转化和热量的损失 ;而氮气的加入在降低碳和热量的损失外 ,降低了硫的脱除更多还原

【Abstract】 The utilization of high sulfur coal would bring many problems such as corrosion of equipment and environmental pollution by sulfur dioxide emission One of solutions is coal pre desulfurization by air or air steam oxidation to remove most of sulfur In this study, three Chinese coals of Yima, Datong and Yangquan with different ranks were tested in a fixed bed at di fferent temperature(300?℃～500?℃), solid residence time(10?min～60?min) and reaction agents The results showed that sulfur and carbon in the coal were oxidized at different rate at the early period and the rate of sulfur oxidation was faster, however, the rate of sulfur oxidation is lower than that of carbon oxidation with the increase of time It can be concluded that pyrite in three coals can be removed completely, and that the addition of steam in the air atmosphere is beneficial to sulfur reducing and calorific value recovery, but the addition of nitrogen would decrease the efficiency of desulfurization更多还原