贵州六盘水地区低热值煤层气高温空气燃烧特性

Characteristics of High Temperature Air Combustion with Low Calorific Value Coalbed Methane in Liupanshui Area, Guizhou

贵州省煤层气不仅利用率低,而且利用形式比较单一,尤其是井下抽采的低热值煤层气,甲烷浓度只有10%~30%,目前主要采取排空的方式,造成巨大的能源浪费。高温空气燃烧技术因其极限回收烟气余热和超低NO_x排放的特点得到广泛关注,扩展了低热值燃料的利用范围,基于燃烧理论和CFD方法,通过理论和数值计算对低热值煤层气高温空气燃烧特性进行了分析。

The utilization rate of coalbed methane in Guizhou province is not only low,but also relatively single,especially the low calorific value coalbed methane extracted from underground mines which has a methane concentration of only 10% to 30%. And the main method to deal with low calorific value coalbed methane is discharging directly,which caused a huge waste of energy. High temperature air combustion technology(HTAC),which expands the utilization range of low calorific value fuels,has attracted wide attention due to its characteristics of extreme recovery of waste heat and ultra-low NOxemission. The characteristics of high temperature air combustion of low calorific value coalbed methane are analyzed by theoretical and numerical calculation based on combustion theory and CFD method.