煤气部分返回炼焦过程焦炭脱硫

将半焦中的硫区分为无机硫和有机硫，在不同气氛和温度下进行脱硫实验；计算煤气返回对焦炉温度的影响和模拟炼焦过程返回煤气在炭化室的分布。结果表明：增加氢气浓度对有机硫和无机硫的脱除都有利，但是温度升高并不总是有利于脱硫；氢气脱硫效果要好于甲烷和一氧化碳；指出了炼焦后期在焦炉煤气返回之前预热煤气可以减少对炉温的影响，但是煤气的预热温度不能太高，否则甲烷裂解容易堵塞管道；煤气的最佳返回时机是在焦炭中孔隙分布较为均匀之时。

DESULFURIZATION OF COKE BY RECYCLING COKE OVEN GAS DURING COKING PROCESS

The experiments were carried out to try to remove the inorganic sulfur and organic sulfur in the semi-coke at different gaseous mixtures and temperatures. The influence of recycling coke oven gas on the coke oven temperature was analyzed and the distribution of recycling coke oven gas in the carbonization chamber was simulated. The result shows that increasing the hydrogen content does favor to remove both inorganic sulfur and organic sulfur. However, rising the temperature does not always benefit the desulfurization. It would have little influence on the coke oven temperature if the coke oven gas is preheated before recycle. The optimal time to recycle the coke oven gas is that the pore distribution in the coke is becoming homogenous.