混煤焦CO2气化特性判定方法的研究
2015-10-21贺惠民李启明贾清霞
贺惠民 李启明 贾清霞



摘 要: 提出用自定义参数完全气化时间﹑稳定因子和参差指数表征混煤焦的气化特性,并利用三个参数研究了掺混煤种﹑掺混比例﹑气化温度对混煤焦恒温CO2气化特性的影响。研究结果表明:浑源煤焦中掺入贵州煤焦有利于提高煤的气化反应性,但是会造成气化反应过程变得更加不平稳,同时会导致气化反应前期和后期的分离程度加大;浑源煤焦中掺入贵州煤焦和准东煤焦后,判定参数明显改变,贵州煤焦中掺入准东煤焦后,判定参数改变相对较小;温度升高有利于混煤焦的气化反应, 并降低了气化反应前后期的分离程度,但是对气化整体过程的平稳度影响较小。
关 键 词:混煤焦;完全气化时间;稳定因子;参差指数
中图分类号:TQ 541 文献标识码: A 文章编号: 1671-0460(2015)06-1257-04
Research on Judging Method for
Characteristics of CO2 Gasification of Blended Coal
HE Hui-min,LI Qi-ming,JIA Qing-xia
(State Grid Hebei North Energy Conservation Service Corporation, Beijing 100045, China)
Abstract: Complete gasification time, stable factor and jagged index were put forward to indicate the gasification characteristics of coal. The effect of coal type, blending ratio and gasification temperature on CO2 isothermal gasification of blended coal was studied. The results show that, blending Guizhou coal in Hunyuan coal can improve the activity of coal to make gasification process become more unstable and result in the difficulty during separation of gasification process. After Hunyuan coal is blended with Guizhou coal and Huaidong coal,the judgment parameters change obviously; After Guizhou coal is blended with Huaidong coal,the judgment parameters change tinily. Temperature rising is advantageous to gasification reaction of blended coal, and can decrease separation difficulty of gasification process,and temperature rising has unconspicuous effect on the smoothness of gasification process.
Key words: Blended coals; Complete gasification time; Stable factor ; Jagged index
發展煤气化技术是煤碳高效清洁利用的主要途径之一,大规模煤气化技术在我国日益受到重视,大量的气化炉投入到工业应用[1,2]。煤的气化特性与气化炉的操作和经济运行密切相关。由于我国煤种的煤质相差较大以及运输能力不足,气化炉在生成产运行过程中往往需要以混煤作为原料[3]。不同的煤种掺混气化时,由于两种单煤气化特性有一定差别,致使混煤的气化反应特性变得较为复杂,这会给气化设备的设计及运行带来困难。因此对混煤的气化特性展开研究有重要的意义。
利用合适的气化特性参数,对煤的气化特性进行准确的描述,是深入研究煤气化特性的有效方式。……
