Articles & Issues

Language: korean

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

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.

All issues

고체 폐기물 연료의 유동층 시험 연소로 특성 및 실험 인자 설정

Solid Waste Fuel Combustion in a Fluidized Bed-Characteristics of a Lab-scale Combustor and Experimental Parameters

최진한 박영호 최상민^†

Jinhwan Choi Youngho Park Sangmin Choi^†

한국과학기술원 기계공학과, 대전 305-701

Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea

smchoi@kaist.ac.kr

HWAHAK KONGHAK, October 2001, 39(5), 629-634(6), NONE

Download PDF

Abstract

나무, 제지 슬러지, 폐기물 재생 연료를 대상으로 열분해/연소 특성을 실험적으로 조사하기 위해 실험실 규모 유동층 연소로를 제작하였다. 시험 유동층 베드에서 단입자 유동층 연소조건을 재현하였고 연료 입자의 반응 과정을 관찰하였다. 가스상으로 배출되는 CO, CO2 농도를 연소실 출구에서 연속적으로 측정하여 탄소 전환 속도, 총 탄소 회수율, 평균 탄소 전환 시간 등을 결정하였다. 600-800℃의 온도범위에서 등온으로 유지되는 유동층 연소조건에 지름이 수 cm인 연료 입자를 투입하였고 입자의 반응 과정을 건조, 탈휘발, 촤 연소로 구분하여 반응 특성을 확인하였다. 전체 연소 과정과 단위 과정에 영향을 주는 주요 인자를 연료 특성과 연소조건으로 나누어 결정하였다.

A laboratory scale fluidized bed reactor was developed to investigate the combustion characteristics of selected solid fuels (wood, paper sludge, refuse derived fuel). The aims were to introduce the means of experimental determination of the solid fuel particle characteristics through the pyrolysis and combustion processes. A nearly single particle combustion condition was reproduced in a fluidized bed and the progress of reaction was observed by determining the rate of carbon conversion, the overall recovery of carbon in gas phase, and the mean conversion time, which were determined by measuring the gas phase carbon containing species, namely CO and CO2 at the exit of the combustor. For a fuel particle whose characteristic length was a few centimeter in a fluidizing environment of 600-800 ℃ sand in a thermally maintained reactor, the sub-processes of fuel drying, pyrolysis as well as the combustion of residual carbon were clearly identified. Major parameters which affect the overall and individual combustion processes were evaluated in terms of the fuel properties and the combustion environment.

Keywords

Fluidized Bed Combustion Characteristics Mean Conversion Time Rate of Carbon Conversion

References

Hodgkinson N, Thurlow GG, "Combustion of Low-grade Material in Fluidized Bed," AIChE Symposium Series, 73(161), 109 (1977)
Jacobs JP, Chem. Eng. Sci., 54(22), 5559 (1999)
Bautista-Margulis RG, Siddall RG, Manzanares-Papayanopoulos LY, Fuel, 75(15), 1737 (1996)
Kunii D, Lavenspiel O, "Fluidization Engineering," 2nd Ed., Butterworth-Heinemann (1991)
Ho TC, Ku P, Hopper JR, AIChE Symp. Ser., 84(263), 126 (1980)
Lau IT, Friedrich FD, AIChE Symp. Ser., 84(262), 89 (1980)
Lorenz H, Rau H, Fuel, 77(3), 127 (1998)
Ogada T, Werther J, Fuel, 75(5), 617 (1996)
Winter F, Prah ME, Hofbauer H, Combust. Flame, 108(3), 302 (1997)