褐煤水热提质研究进展

Research progress of lignite hydrothermal upgrading technology

为实现褐煤水热提质的工业化应用,分析了水热提质对煤质的影响,综述了水热提质改善水煤浆泵送特性,脱除煤中有害物质,实现废水治理等应用现状,最后阐述了水热提质连续化装置的研究进展。褐煤水热提质可同时脱水、脱氧,解决褐煤远距离运输及自燃问题,提高利用效率;水热提质同时还可脱除煤中潜在的有害元素,提高褐煤成浆性;水热提质的废水问题可结合水热气化方法或废水制浆解决。提出应加快管道式褐煤水热工业化装置的开发,对褐煤水热提质联合水煤浆气化或燃烧发电的经济性进行分析,加快实现褐煤水热提质的工业化步伐。

In order to realize industrialized application of lignite hydrothermal upgrading technology,the influence of the technology on lignite properties was analyzed.The coal water slurry pumping characteristics improvement,harmful materials removal,waste water treatment were introduced.The research progress of hydrothermal upgrading continuous facilities were analyzed.The results showed that,the technology could remove the water and oxygen-containing functional groups simultaneously,so the lignite long-distance transportation turned reality and spontaneous combustion probability decreased.The hydrothermal upgrading was able to remove the potential undesirable elements in coal,which was vital to clean utilization of lignite.The hydrothermal upgrading improved the slurry abilities of lignite,which was useful for high concentration lignite slurry combustion and gasification.The most promising process for industrial hydrothermal upgrading technology was the pipe reactor.It was recommended to develop industrial facilities as soon as possible and conduct economic analysis for the combination of hydrothermal upgrading and coal water slurry gasification or combustion for power generation.