缓倾斜煤层反向两阶段煤炭地下气化模型实验

Model Test Two-Stage Underground Coal Gasification in Counter Directions with Gently Inclined Coal Seam

为了提高煤炭地下气化产品煤气的热值 ,提出并研究了缓倾斜煤层反向 2阶段煤炭地下气化方法。在物料平衡的基础上 ,建立了 2阶段煤炭地下气化方法理想气化参数的计算模型。通过对模型试验结果的分析 ,指出了该气化方法温度场发展过程的一般规律和中热值地下水煤气的形成原因 ,从而得到了一些工艺控制参数。反向 2阶段煤炭地下气化方法能够获得热值Q =12 .5 6MJ m3 以上的地下水煤气 ,该煤气由水煤气和干馏气组成 ,与同向 2阶段气化方法相比 。

In order to improve heat value of gas produced in the process of Underground coal Gasification, two stage Underground coal Gasification in counter directions with gently inclined coal seam is put forward and studied. On the basis of material halance, a model of two stage underground coal gasification in counter directions is built with ideal gasification parameters. According to the results of model test, the general rules of development of the temperature field and formation of underground water gas of medium heat value are described. Some parameters for controlling the technology are obtained. Gas with a heat value greater than Q =12.56 MJ/m 3 can be obtained by using the method and it consists of water gas and pyrolysis gas. Thermal efficiency of counter directions process is higher than that of same directions.