华亭煤地下导控气化现场试验的产气效果分析

Analysis of effect of underground guided coal gasification field trial at Huating coal group

本文提出了煤气指标时间加权的计算方法,对华亭煤地下导控气化现场试验数据进行了分析,结果表明随着气化剂中氧浓度的上升,煤气热值呈上升趋势,富氧蒸汽法气化工艺中气化剂中较佳的氧浓度范围为30%～40%;最大热值10.72MJ/Nm3出现在空气蒸汽两阶段法的第二阶段,但空气蒸汽两阶段法的产气波动性较大,同时水煤气产率较低,生产规模较小,无法连续生产高热值煤气,用于商业化生产需要多炉同时运行。随着氧浓度的升高,各工艺的产气稳定性逐渐增强,从低温工艺向高温工艺切换的调控时间缩短。

This paper presents time-weighted coal gas indexes calculation method, on this base, field test data of underground coal gasification of Huating coal is analyzed. Results show that, with the increasing of oxygen content in gasifying agents, the gas calorieity rises, and the optimal oxygen concentration range to increase the gas calorieity is 300%-40%. The maximum value of 10.72 MJ/Nm^3 with the higher fluctuation in coal gas indexes, lower yield and produc- tion scale eompanied discontinuous production of high calorific value coal gas appeared in the air and steam two stage way, so more than one gasifiers are needed in commercial production ;As the rising of oxygen concentration in gasifying agents, the stability of gasification increases grad- ually and regulating time from low temperature to high temperature process decreases.