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Efficient Use of Low Rank Coal: Current status of low rank coal utilization

机译：高级煤的有效利用：低排名煤利用的现状

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Despite vast reserves,low rank coals are not used as a main fuel in industry because their high moisture content,potential spontaneous combustion in transportation and storage,and the low thermal efficiency during the combustion in conventional power plants.With a view to secure and strengthen low rank coal's position as high available energy source,in recent years many attempts have been made to develop technologies for an energy-efficient upgrading process. This paper reviews these technologies mainly categorized as drying for reducing moisture,stabilization for decrease selfheating characteristics and cleaning the coal for reducing mineral content of coal.Drying technologies consist of both evaporate and non-evaporative types. There are also highly advanced coal cleaning technologies that produce ash-free coal. The paper discusses some of the promising upgrading technologies aimed at improving these coals in terms of their moisture,ash and other pollutants.Korea's activity for the drying and stabilization technologies will be introduced in this paper and the utilization of dried low rank coal also introduced.
机译：尽管储备了巨大的储备，但低级煤不被用作行业的主要燃料，因为它们的高水分含量，运输和储存中的潜在的自发燃烧，以及传统发电厂中的燃烧过程中的低热效率。可靠性和加强低排名煤炭的地位作为高可用性的能源，近年来已经尝试开发了节能升级过程的技术。本文评价这些技术主要分类为减少水分的干燥，降低自热特性和清洁煤炭的矿物质煤的稳定化。作用于蒸发和非蒸发类型组成。还有高度先进的煤炭清洁技术生产无灰煤。本文讨论了一些有前途的升级技术，旨在在水分，灰和其他污染物方面改善这些煤炭。本文将介绍干燥和稳定技术的干燥和稳定技术的活动，并介绍了干低排名煤的利用。

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