昔阳无烟煤地下气化模型试验研究

Experiment Research on Underground Coal Gasification of Xiyang Anthracite

为了探索无烟煤地下气化过程的基本规律，以及制定合理的工艺参数，测定了山西昔阳无烟煤反应活性，并进行了富氧地下气化模型试验；研究了不同富氧浓度下，温度场、出口煤气有效组分含量、热值、产气率及热效率的变化规律．试验结果表明，随着氧气浓度的增加，气化区温度升高，煤气中H2，CO含量增加，但当氧气浓度大于40％时，温度上升幅度增加，但煤气中有效气体组分含量上升幅度减小；添加水蒸汽后，才能提高H2，CO含量，并有效地控制气化炉温度，保持煤气热值的稳定；随着富氧浓度的提高产气率下降，气化效率在52．10％～75．09％之间。

The reaction activity of Xiyang anthracite was measured and a model experiment of richoxygen of underground coal gasification （UCG） was carried out for exploring the law of UCG of anthracite and proposing rational technical parameters. Under the conditions of different contents of rich-oxygen, the temperature field, the various law of the main gas component, heat value,the rate of producing gas and heat efficiency were studied. The results show that the temperature of gasification zone and the contents of H2 and CO in gas increased with the increasing of the content of rich-oxygen. When the content of rich-oxygen is bigger than 40%, the temperature increase rapidly, while the effective component content increase slowly. The content of H2 and CO in gas will rise and, the temperature of gasifier and the heat value remain stable after adding steam. With the raise of content of rich-oxygen, the rate of producing gas will be reduced, and the gasification efficiency is 52.10%--75.09%.