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Language: korean

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

Publication history: Received July 18, 2008
Accepted August 21, 2008

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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3 kW급 매체순환식 가스연소기의 고체순환특성

Solid Circulation Characteristics in a 3 kW Chemical-looping Combustor

류호정^† 박재현 김홍기¹ 박문희²

Ho-Jung Ryu^† Jaehyeon Park Hong-Ki Kim¹ Moon-Hee Park²

한국에너지기술연구원 제로에미션연구센터, 305-343 대전시 유성구 장동 71-2 ¹충북대학교 공업화학과, 361-763 충북 청주시 흥덕구 개신동 산 48 ²호서대학교 통계학과, 336-795 충남 아산시 배방면

Zero Emission Technology Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Korea ¹Department of Industrial Engineering Chemistry, Chungbuk National University, San 48 Gaesin-dong, Heungduk-gu, Cheongju 361-763, Korea ²Department of Informational Statistics, Hoseo University, Asan 336-795, Korea

Korean Chemical Engineering Research, December 2008, 46(6), 1057-1062(6), NONE Epub 29 December 2008

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Abstract

기존 2탑 유동층 공정의 단점을 극복하기 위해 두 개의 기포유동층, 고체분사노즐, 상승관 및 고체재순환관으로 구성된 신개념 2탑 유동층 공정을 적용한 3 kW 매체순환식 가스연소기를 개발하였다. 본 연구에서는 3 kW급 매체순환식 가스연소기에서 고체순환속도에 미치는 고체분사노즐 유속, 유동화속도, 고체층 높이, 고체유입구의 단면적, 층 온도 등의 영향을 고찰하였다. 고체순환속도는 고체층 높이가 증가하고 고체유입구의 단면적이 증가할수록 증가하는 경향을 나타내었으며 유동화속도와 온도의 영향은 크지 않았다. 장기연속운전 가능성을 검토하기 위해 50시간까지 고체순환 장기연속운전을 실증하였다. 두 유동층과 고체재순환관의 압력강하 값이 안정적으로 유지되어 고체순환이 원활하고 안정적으로 유지되는 것을 확인하였다.

To overcome disadvantages of conventional two interconnected fluidized beds system, a novel two-interconnected fluidized bed process has been adopted to 3kW chemical-looping combustor. This system has two bubbling beds, solid injection nozzles, solid conveying lines, and downcomers. In this study, effects of operating variables such as gas velocity through the solid injection nozzle, fluidizing velocity, solid height, geometry of solid intake hole, bed temperature_x000D_ on solid circulation rate have been investigated in a 3kW chemical-looping combustor. The solid circulation rate increased as the solid height and the opening area of solid intake holes increased. The effect of the fluidizing velocity and the bed temperature were negligible. Moreover, long-term operation of continuous solid circulation up to 50 hours has been performed to check feasibility of stable operation. The pressure drop profiles in the bubbling beds and the_x000D_ downcomers were maintained steadily and solid circulation was smooth and stable.

Keywords

Chemical-looping Combustion Solid Circulation Bubbling-bubbling Bed Long-term Operation

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