Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Permeation Characteristics of the Plate & Frame Membrane Module with Protuberances

돌기형 평판 분리막 모듈의 투과특성

  • Chung, Kun-Yong (Department of Chemical Engineering, Seoul National University of Technology) ;
  • Jeon, Sung-Il (Department of Chemical Engineering, Seoul National University of Technology)
  • 정건용 (서울산업대학교 화학공학과) ;
  • 전성일 (서울산업대학교 화학공학과)
  • Published : 2008.06.30
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Abstract

This study was carried out for the plate and frame membrane modules equipped with and without plastic protuberances on the support frame in order to determine the effect of eddy flow induced by the protuberances on permeate flux. The initial time for rapidly declined permeate flux on the module with protuberances was delayed twice or more than that on the module without protuberances when kaolin solution was permeated at the operating pressures from 0.4 to 1.6 bar. Also decreasing ratio of the kaolin solution to pure water flux for module with protuberances was 1 to 5% lower than that for module without protuberances. The flux improvement due to protuberances at laminar flow corresponding Reynolds number 1,750 was about double as compared with that in the transition flow region. In general, the kaolin fouling reduction for the plate module with protuberances during initial filtration process was very effective, even though the permeate flux after 60 minutes filtration did not increase significantly.

본 연구에서는 평판 지지층 위에 부착된 플라스틱 돌기에 의하여 형성되는 와류가 투과성능에 미치는 영향을 측정하기 위하여 돌기 있는 모듈과 돌기 없는 모듈에서 각각 투과 실험하였다. 운전압력을 0.4 bar에서 1.6 bar까지 증가시키면서 카올린 용액을 투과시킬 경우, 돌기형 평막 모듈은 돌기가 없는 모듈과 비교하여 초기 투과유속 감소 시간이 2배 이상 연장되었고 순수 대비 투과유속의 감소비 역시 1 내지 5% 가량 낮게 나타났다. 레이놀즈수가 1,750인 층류영역에서 돌기에 의한 투과유속 향상은 전이영역에 비하여 약 2배 높게 나타났다. 전반적으로 평막 모듈에 부착된 돌기는 60분 후 투과유속 향상에는 크게 기여하지 못하였지만, 투과실험 초기에는 막오염 방지에 효과적인 것으로 확인되었다.

Keywords

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