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

Publication history: Received January 17, 2008
Accepted April 1, 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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Gaussian 분포의 입자군의 표준편차에 따른 최소유동화속도

The Minimum Fluidization Velocity of Gaussian Distribution Particle System According to Standard Deviation

장현태 박태성¹ 차왕석^2†

Hyun Tae Jang Tae Sung Park¹ Wang Seog Cha^2†

한서대학교 화학공학과, 356-706 충남 서산시 해미면 대곡리 360 ¹에너지기술연구원 이산화탄소처리 및 저감기술개발 사업단, 305-343 대전광역시 유성구 장동 71-2 ²군산대학교 토목환경공학부, 573-701 전라북도 군산시 대학로 1170

Dept. of Chem. Eng., Hanseo University, Seosan, Choongnam 356-706, Korea ¹Carbon Dioxide Reduction Sequestration R&D Center, Korea Institute of Energy Research, 102 Gajeong-ro Yuseong-gu Daejeon 305-343, Korea ²Dept. of Civil and Environ. Eng., Kunsan Nat’l University, Kunsan 573-701, Korea

wscha@kunsan.ac.kr

Korean Chemical Engineering Research, June 2008, 46(3), 567-570(4), NONE Epub 7 July 2008

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Abstract

내경 0.109 m의 유동층에서 다입자경 모래에 대한 압력요동의 표준편차와 유속간의 선형회귀분석을 이용한 최소유동화속도 측정법의 적용성을 조사하였다. 다입자경 모래를 평균입자크기가 같은 Gaussian 분포에서 입자분포의 표준편차에 따른 최소유동화속도를 측정하고, 측정치를 타 연구자들의 식과 비교 검토하였다. 압력요동의 표준편차 값 선형회귀분석법과 층내 압력강하로부터 구한 최소유동화속도를 구하였다. 최소유동화속도 결정에서 유속 범위는 혼합도가 낮은 유속범위와 free bubbling 영역 이상을 제외한 범위값 이어야 하며, 이 유속범위에서 측정위치는 혼합이 양호한 층 중앙이 가장 적절하다.

The present study investigated the applicability of the minium fludization velocity measuring method using linear regression analysis between the standard deviation of pressure fluctuation and gas velocity in multi-particle sand on a fluidized bed 0.109 in inner diameter. We measured minium fludization velocity according to the standard deviation of particle distribution in Gaussian distribution. The measured value compared with other researchers' equations. The minium fludization velocity derived from the linear regression analysis of the standard deviation of pressure fluctuation and pressure drop inside the bed. We also found that the minium fludization velocity of a multi-particle system using the standard deviation of pressure fluctuation must be measured at freely bubbling region.

Keywords

Minimum Fludization Vlocity Pressure Fluctuation Properties Gaussian Distribution Fluidized Bed

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