煤系地层热导率测试研究

Study on Heat conductivity of Seam Strata

阐述了煤系地层的导热机理 ,具有不均匀性、各向异性和属于多相介质等固有特性 ,以及几种典型相分布时热导率的计算公式。介绍了稳态法和非稳态法的工作原理和测定方法 ,测试了大量煤系地层试样的热导率 ,并对其影响因素如温度、孔隙率和化学结构等进行了分析。

The paper introduced a heat conductivity mechanism of coal strata. The coal strata has a heterogeneity, aeolotropism, multi medium and fixed features. The paper introduced the calculation equation of the heat conductivity when the coal strata in several typical distribution. The paper introduced the operation principle and measuring method for the sample heat conductivity of coal strata with stable method and non stable method. The heat conductivity of many coal strata samples were measured with the heat conductivity measuring meter. The paper analyzed and studied the influence factors, such temperature, fissure rate, crystalline structure and chemical component. And the paper found the laws of the influence factors.of Suspended Sulfur in Tannin Extract Desulfurizing Solution$$$$ Ge Yiyun Abstract How to determine promptly the content of suspended sulfur in the tannin extract desulfurizing solution is the key to finding out and improving the desulfurization efficiency. The conventional anaytical methods requrie a long time, thus impairing promptness and usually endangering production stability. By carrying out numerous experiments and employing mathematical statostocs, an empirical formula is obtained for the rapid determination of the content of suspended sulfur in the tannin extract solution, remedying the defece of time consuming of gravimetry and iodimetry. The empirical formula has been proven to satisfy production requirements in practical application.