涌入水对煤炭地下气化影响的模型实验研究

MODEL TEST ON WATER INFLOW OF UNDERGROUND COAL GASIFICATION(UCG)

涌入煤层的水量是煤炭地下气化过程中十分重要的影响因素,利用地下气化模型实验平台对涌水条件下的气化过程进行研究.结果表明,平均温度直接反应了煤气组分和热值的高低,煤气有效成分H2,CO,CH4和热值基本上与气化区平均温度呈正相关.在模型实验中,鼓风量和涌水量的最佳比值为2.5∶1,临界比值为1.4∶1,涌入水分解率基本稳定在10%,并且随着涌入水量的提高,分解率在下降,分解的水量基本不变.

The water inflow into coal seam is a very important influence factor of UCG,the process of UCG under water inflow was studied in this paper by UCG model test platform.The research shows that（the average of temperature field） could direct response the high or low of gas component and low heat-value.The relationship between gas component,low heat-value and was positive correlation.In the model test,the optimal ratio of blast volume to influx water was 2.5∶1 and the critical ratio was 1.4∶1,the decomposition rate of water inflow was stable at 10%.With the improvement of velocity of water inflow,the decomposition rate of water inflow was dropped,but the decomposition of the water was unchanged.