煤在炼焦过程中热解脱硫降低焦炭中硫含量

通过模拟工业焦化过程,针对一种高硫煤考察了不同气体种类、流量及加热速率下,焦炉煤气返回焦化过程对物焦炭中硫含量变化的影响。结果表明,焦化过程中通入H2,CH4和N2气体可以抑制热解气中的硫返回固体焦炭中,H2达到的焦炭脱硫量最大,其次是CH4和N2;增大气体流量、减小加热速率有利于使硫向气相转移,从而使固体焦炭中的硫分配降低;固体焦炭中硫含量变化亦表明,H2效果较佳,在3·0,1·5℃/min2种加热速率下可使焦炭中硫含量分别降低0·36%~0·39%和0·46%~0·56%。 By simulating industrial coking process,in view of a high-sulfur coal inspected the different types of gas flow and heating rate,coke oven gas to return to the process of coking coke in the sulfur content of change. The results showed that all-coking process of H2,CH4 and N2 gas can inhibit thermal gasification of solid sulfur return coke,the coke H2 achieve desulfurization of the largest,followed by CH4 and N2; increased gas flow,reducing the heating rate is Sulfur helps make the shift to gas,solid coke so that the distribution of sulfur in lower sulfur content in the solid coke changes also show that better results H2,3.0,1.5℃/min heating rate will enable the two of sulfur content of coke decreased 0.36 percent and 0.39 percent to 0.46 percent to 0.56 percent