Experimental Study on Drying of Low Rank Coal by Changed Temperature and Particle Size
Nowadays,coal plays an essential role in our global energy mix.With the increasing energy costs and dwindling supplies of petroleum and natural gas,low rank coal has been becoming more and more attractive and practicable,which accounts around 45％ of the worlds coal reserves and is cheaper than other fossil fuels.However,low rank coal such as lignite contains 30％-60％ moisture content and 25-40％ volatile matter have kept it from being aggressively exploited until recently.Therefore,how to reduce the moisture content of low rank coal has been an increasingly necessary to solve. The objective of this paper is to obtain appropriate parameters of drying of low rank coal using the heating method.This drying process is heated by Electronic Moisture Balance (EMB) method through changing temperature and particle size.We choose three different particle sizes as the experimental samples to conduct this experiment at three different temperatures.According to the analysis of this experiment and the TGA results,we conclude that the optimal temperature of causing to a dramatically decrease of moisture content is at 107℃ and the drying time of low rank coal is set as 30 min,the three different particle sizes which are chose in this experiment and are less than 3 mm have no distinctive drying effect at 80° C,107℃,150℃,respectively,the optimal drying temperature range of low rank coal is from 103℃ to 123℃ and the drying rate accelerates with the increasing of the temperature which is in agreement with the theory of convection heat flux.
Low Rank Coal Coal Drying Drying Rate Heating
Xiang-Zhou Yuan TaeJim Kang DoMan Jeon Hueon Namkung YoungSin Jeon Hyung-Taek Kim
Division of Energy Systems Research,Ajou University,San 5 Woncheon-Dong,Youngtong-Gu,Suwon,Korea
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
600-603
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）