煤层含气量评价方法研究与应用

A reconstruction of the air preheater of 600 MW units

川南大村勘查区二叠系龙潭组沉积了多套煤层,为了准确预测该区主要煤层的含气量,了解煤层含气量的分布规律,提出一种基于综合因素对含气量影响评价的组合法。该组合法与密度测井、KIM方程以及煤层工业组分等计算方法预测煤层含气量的结果相比,组合法预测含气量的精度高,与测试含气量相关性好。利用组合法对研究区多口井进行分析,揭示了C_（17）煤层含气量的平面分布规律,该煤层含气量较好的区域主要分布于二郞坝向斜西翼,沿核桃坝断层、马桑坪断层、文昌宫断层分布。该方法充分考虑煤层含气量的影响因素,有助于提高煤层含气量的预测精度。

Jinglong Power Plant burn a large number of mixed lignite, which lead to the problems of blending coal mills insufficient drying capacity and affected the safe operation of coal pulverizing system. Based on the inver- sion of tri - sector regenerative air preheater, the expansion of primary fan and the comprehensive reform of in- stalling sofe seal, the output of coal pulverizer inlet air temperature rose further, the drying capacity increases significantly, and the air preheater leakage rate dropped. It meets the requirements of the large proportion of blending lignite with both the fan power consumption and the risk of a fan stall reduced, which provide helpful reference of the lignite mixed burning for power plants.