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http://dx.doi.org/10.3795/KSME-B.2010.34.3.259

An Experimental Investigation of the Effect of Particle Size on the Combustion Characteristics of Pulverized Sub-Bituminous Coal with Low Calorific Value by Using an LFR System  

Jeon, Chung-Hwan (School of Mechanical Engineering, Pusan Nat'l Univ.)
Kim, Yong-Gyun (School of Mechanical Engineering, Pusan Nat'l Univ.)
Kim, Jae-Dong (School of Mechanical Engineering, Pusan Nat'l Univ.)
Kim, Gyu-Bo (Pusan Clean Coal Center, Pusan Nat'l Univ.)
Song, Ju-Hun (School of Mechanical Engineering, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.34, no.3, 2010 , pp. 259-267 More about this Journal
Abstract
In this study, the effect of particle size on the combustion characteristics of pulverized sub-bituminous coal was experimentally investigated. A laminar-flow-entrained reactor was designed and implemented to realize the desired heating ratio and temperature corresponding to the combustion atmosphere of a pulverized-coal-fueled furnace. The flame length and structure of burning particles according to different sizes were investigated. Coal combustion processes were clearly distinguished by direct visual observation of the flame structure. The onset point of volatile ignition is greatly affected by changes in the particle size, and the burning time of the volatiles is least affected by changes in the particle size. The length and instability of char flame also increase with the increase of the particle size. However, the char consumption rate within the residential time remains nearly constant.
Keywords
Pulverized Coal; Combustion; Laminar Flow Reactor; Flame Length; Residential Time; Heating Rate; Particle Size;
Citations & Related Records

Times Cited By SCOPUS : 1
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