다공성 흡수매체에 대한 정전삼투 탈수효과

박선미; 박미정; 하지수; 장혁상; Seonmi Park; Mijung Park; Jisoo Ha; Hyuksang Chang

Clean Technology, Vol.16, No.2, 145-152, June, 2010

Export Citation

다공성 흡수매체에 대한 정전삼투 탈수효과

Electroosmotic Water Removal in Wet Porous Materials

박선미, 박미정, 하지수¹, 장혁상^†

영남대학교 환경공학과, 712-749 경북경산시 대동 214-1
¹계명대학교 에너지환경공학과, 704-701 대구광역시 달서구 달구벌대로 2800

Seonmi Park, Mijung Park, Jisoo Ha¹, and Hyuksang Chang^†

Department of Environmental Engineering, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk 712-749, Korea
¹Department of Energy and Environmental Science, Keimyung University, 2800 Dalgubeoldaero, Dalseo-gu, Daegu 704-701, Korea

E-mail:

초록

함수매체에 대한 효율적 탈수를 위해 에너지 효율적인 여러 탈수공정이 적용되고 있다. 본 연구에서는 탈수공정에서 에너지 소모를 줄이기 위한 방법으로 적용되고 있는 정전삼투효과를 연구하였다. 정전삼투공정을 연구하기 위한 실험용 정전삼투반응기가 구성되었고 공정변수인 전기장의 형태, 흡수매체의 성질 등의 영향이 조사연구 되었다. 정전삼투공정을 위해 매체에 인가된 전기장은 최대전압 100 V/cm 및 최고주파수 10 kHz 범위를 가진 3가지 파형의 직류전압이 사용되었으며 실험용 흡수매체는 직경 0.18 mm, 0.35 mm, 1.2mm 유리비드로 충진된 모사형 흡수매체를 사용하였다. 운전조건에 따라 차이가 있으나 정전삼투에 의해 최대 6%의 함수제거율을 획득하였으며 제습에 소요전력은 조건에 따라 다르나 약 330~490 cal/g-water의 값을 유지하였다.

Various technical methods are applied for removing water from the water-retaining media, and the energy efficiency is the main concern in those methods. The electroosmotic process is studied as an efficient way for dewatering. An experimental electroosmotic reactor is designed and used for evaluating the effects of operational variables. The operational variables such as the electrical fields and the structure of water-retaining medias were studied. Three different shapes of polarized electric fields in ranges of 0-100 V/cm and 0-10 kHz are used as the source of electric voltage. The effect of electroosmotic process with respect to the structural variation is estimated by filling the electroosmotic reactor with the glass beads in 0.18 mm, 0.35 mm and 1.2 mm in diameters. 6% of water removal is obtained in the simulating electroosmotic reactor of glass beads. The estimated energy consumption in the simulating electroosmotic was 330~490 cal/g-water.

Keywords:정전삼투;탈수공정;공극구조;Electroosmosis;Dewatering processes;Porous structure

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[2] Chen H, Mujumdar A, Raghavan G, Dry. Technol., 14(10), 2435 (1996)

[3] Man Y, Guohua C, "Enhanced Electroosmotic Dewatering of Fine Particle Suspension Using a Rotating Electrode," The 12th International Drying Syrnposium(IDS 2000), August 28-31, Noordwijerhou, The Netherlands (2000)

[4] Yoshida H, Dry. Technol., 11(4), 787 (1993)

[5] Vijh AK, Dry. Technol., 17(1), 575 (1999)

[6] Vijh AK, Dry. Technol., 17(3), 565 (1999)

[7] Bertolini L, Coppola L, Gastaldi M, Redaelli E, Constr. Build Mater., 23(1), 254 (2009)

[8] Mitchell JK, Fundamentals of soil behavior, 3ed ed., John Wiley & Sons Inc., New York (2001)

[9] Eykholt GR, Daniel DE, J. Geotech. Eng., 120(5), 797 (1994)

[10] Reddy RK, Urbanek A, Khodadoust AP, J Environ. Manage., 78(2), 200 (2006)

[11] A-Asheh S, Jumah R, Banat F, Al-Zou'Bi, Food Bioprod Process., 82(3), 193 (2004)