维多利亚褐煤干燥气化技术进展

为实现褐煤清洁高效利用,在分析维多利亚褐煤煤质特性的基础上,综述了国外先进的褐煤干燥及气化技术。褐煤干燥工艺主要有蒸发干燥和非蒸发脱水2种,重点分析了磨煤机干燥工艺、褐煤浆生产高致密褐煤球干燥工艺、回转蒸汽管干燥工艺和机械热挤压脱水工艺的工艺流程和应用现状,其中磨煤机干燥工艺和回转蒸汽管干燥工艺技术比较成熟,工业应用较多。论述了维多利亚褐煤气化工艺中的褐煤集成干燥气化工艺和增压流化床气化工艺,提出若将褐煤集成干燥气化工艺中的空气气化改为富氧或纯氧气化,并通入一定比例水蒸气,该工艺有望应用于中国煤化工领域,生产化工合成原料气,为中国褐煤高效洁净利用提供途径。

Vitoria lignite drying and gasification technologies

To utilize lignite clean and effectively,introduced advanced drying and gasification technologies of lignite at home and abroad based on the analysis of Vitoria lignite characteristics. Evaporation drying and non-evaporating dehydration technology were the main lignite drying technologies. The technological processes and current states of pulverizer drying technology,lignite ball drying technology,rotary steam tube drying technology and dehydration process with mechanical thermal extrusion were analyzed. The first and third technology were more mature,which were widely used in the industry. The integrated lignite drying and gasification process and the pressurized fluidized bed gasification process were discussed. For the integrated process,it was utilized in coal chemical industry by setting the operation condition in oxygen enriched or pure oxygen and inputting vapour.