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유상오(Sang Oh Yoo),이진욱(Jin Wook Lee),정석우(Seok Woo Chung),윤성필(Sung Pill Yoon),이재만(Jae Man Lee),이민회(Min Hoe Yi),임성광(Sung Kwang Lee) 한국에너지기후변화학회 2013 에너지기후변화학회지 Vol.8 No.1
Pulverized low rank coal for the utilization of fast fluidized bed gasification is larger in size and higher in moisture content compared to those of entrained bed gasification. So, coal transport might not be stable because of strong possibility of bridging in the injection vessel and plugging in the transport line. In this study we have been trying to develop the new technology to overcome such operational problems. As first step to develop such technology, series of pneumatic transport experiment have been performed using simple transport system which is consist of injection vessel and receiver tank. Characteristics of pneumatic transport of pulverized low rank coal have been studied under various operating conditions such as operating pressure, pressure difference between injection vessel and receive tank and so on.
황상연(Sang Yeon Hwang),정기진(Ki Jin Jeong),윤성필(Sung Pill Yoon),정석우(Seok Woo Chung),이진욱(Jin Wook Lee),김용전(Yong Jeon Kim),임성광(Sung Kwang Lim),김형택(Hyung Taek Kim) 한국에너지기후변화학회 2014 에너지기후변화학회지 Vol.9 No.1
Alternative energy resources have been sought worldwide and the related research activities are underway to reduce the evolution of the green-house gases and to counteract the energy consumption of fossil fuel and high crude oil price. In this regard, coal gasification technology is one of the fastest growing technologies in the alternative energy industry for its capability to produce clean fuel from the low rank coal. Although low rank coal is more attractive than expensive bituminous coal, challenging technical barriers must be overcome before large scale utilization of low rank coal: most notably of all, high moisture content and spontaneous ignition during storage. Therefore, it is necessary to improve the quality of the low rank coal by drying process for efficient and environment-friendly use of low rank coal. In the present research, lab-scale study was carried out to investigate the drying characteristics of pulverized low rank coal. More specifically, a series of experiments was designed and conducted to see the effects of hot carrier gas temperature and its flow rate during the pneumatic transport of the pulverized coal.