低阶煤干燥脱水技术的研究

介绍了转筒式干燥工艺、流化床干燥工艺、气流床干燥工艺等蒸发干燥工艺和热力脱水工艺（HTD）、机械热挤压脱水工艺（MTE）、UBC低阶煤干燥提质技术等非蒸发脱水工艺的工艺流程、技术特点及发展现状等。分析了低阶煤脱水工艺系统建设过程中干燥工艺、厂址、干燥介质与能源消耗的选择原则和依据。发现低阶煤干燥脱水工艺的选择应考虑目标用户对产品质量的要求,产品加工工艺对提质煤水分的要求且应尽量选择安全可靠、能耗较小、成本较低的干燥技术。厂址的选择需多方面综合考虑。干燥介质的选择应因地制宜,同时必须综合考虑干燥介质的成本及安全性。较低的干燥能耗才能够保证干燥工艺的长期运行,并产生经济价值。低阶煤干燥脱水技术的研究为低阶煤干燥工艺的选择及良好运行提供参考。

Techniques for low rank coal dewatering and drying

Introduce the techniques for low rank coal evaporation drying,such as rotary drying,fluid bed drying,entrained-flow drying.Meanwhile,study some non-evaporation dewatering technologies,including thermal dehydration,mechanical dewatering and UBC low rank coal upgrading technology.Emphasize the technological processes,technical features and status of these two kinds of dewatering technologies.Analyse the selection principle and basis for drying process,drying medium,factory location and energy consumption during the construction of low rank coal drying system.The results show that,the selection of drying system should consider the users requirement,the moisture of upgraded coal,security,energy consumption and the cost.The location of factory is crucial,the selection of drying medium should think ahead the cost and safety.The lower energy consumption guarantee the longer running of drying process and its economic benefits.