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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received May 3, 2011
Accepted July 31, 2011

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Unburned carbon fraction with operation variables in a commercial circulating fluidized bed boiler during co-combustion of various anthracites

Jong-Min Lee^† Dong-Won Kim Jae-Sung Kim

Korea Electric Power Research Institute (KEPRI), KEPCO, Daejeon 305-380, Korea

jmlee@kepri.re.kr

Korean Journal of Chemical Engineering, April 2012, 29(4), 452-459(8), 10.1007/s11814-011-0193-3

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Abstract

Reduction of unburned carbon fraction in exhaust during co-combustion of various coals in a circulating fluidized bed boiler (CFB) is required to save energy loss and to optimize coal utilization as well as to improve the boiler efficiency. In this study, the effects of operation variables such as coal, air and heat flow rates, co-combustion ratio of each coal, primary to secondary air ratio on unburned carbon fraction were analyzed and evaluated in two units of 200MWe circulating fluidized bed boiler in the Tonghae thermal power plant. From the results, the comprehensive correlation among unburned carbon fraction and operation variables in #1 and #2 units of the CFB boiler could be derived with a good agreement. This would be expected to give a good guideline to reduce the unburned carbon content in exhaust in the CFB boiler.

Keywords

Unburned Carbon Operation Variables CFB Co-combustion Tonghae Thermal Power Plant

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