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역삼투용막의 나선형 모듈화에 따른 성능변화

Performance Change of Reverse Osmosis Membrane by Fabrication into Spiral-Wound Module

박석우 박용선 장호남

Park SW Park YS Chang HN

HWAHAK KONGHAK, February 1990, 28(1), 124-129(6), NONE

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Abstract

Cellulose acetate 막으로 역삼투용 나선형 모듈을 제작하여 염수의 투과에 대하여 알아보았다. 실험결과 순수 투과도는 0.272L/m²h atm으로 cell test 결과의 약 13% 정도였으며 그 이유는 지지재(support)등으로 인한 투과수측의 흐름저항이 크기 때문이었다. 압력이 증가함에 따라 투과율(flux)과 거부도(rejection)는 향상되는 경향을 보였다. 공급수측의 유량은 투과율과 rejection에 심한 영향을 미쳤으며 막의 packing 방법도 성능에 영향을 주었다. 공급수측의 흐름분포를 좋게 하기 위해 여러 각도의 tip을 부착하여 본 결과 꼭지각이 30^o인 원뿔꼴일 때가 가장 좋았다.

Permeation characteristics of NaCl solution were studied using a cellulose acetate reverse osmosis spiral-wound module. The pure water permeability through the module was 0.272L/m²h atm which amounted to 13% of the cell test. The lower permeability of the module is attributed to the permeate flow resistance through the support inserted between the two membrane envelopes. As the pressure was increased, the permeability and salt rejec-tion increased. The permeability and the flux were dependent on the inlet flow rate to the module and the way of pack-ing. For a uniform flow distribution in the module, several distributor tips were designed, among which 30^o cone-type distributor was found to be most suitable.

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References

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