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쿠엣트 응집기를 이용한 고형물의 응집 및 고-액 분리에 관한 실험적 연구-제 1부 : 최적 응집조건
Experimental Studies on Flocculation of Solied Particles and Solid-Liquid Separation with Couette Flocculators-Part1. OPtimum Flocculation Conditions
HWAHAK KONGHAK, December 1989, 27(6), 812-822(11), NONE
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Abstract
테일러 와류를 보이는 쿠엣트 응집기를 활용하여 수용액 중 고형물의 응집 및 분리특성을 고찰하였다. 실리카 및 카올린 현탁입자에 양이온계 고분자 응집제를 투여한 연속식 실험계에서 최적 체류시간은 약 150초 정도인 것으로 나타났다. 최적 응집조건을 나타내는 테일러 수는 고형물의 농도가 1g/l 이하에서는 각 실험계마다 일정하였으며 현탁입자의 농도가 3-10g/l 범위에서는 고형물의 농도에 따라 감소하였다. 또한 최적 테일러 수는 현탁입자와 고분자 응집제의 농도를 함수로 하는 무차원 상관식으로 표현되었다. 최적 응집조건에서의 캠프 수는 1.37×104-5.90×104범위로 분산되는 경향을 보였다.
The study on flocculation in a Couette flocculator showing Taylor vortices and subsequent solid-liquid separation characteristics was conducted experimentally. In this study silica or kaolin suspensions in water were used to investigate flocculation by cationic polymers. In the present experiments the optimum retention time was found to be about 150 seconds. The optimum Taylor number reached a constant value, when the suspension concentration was less than 1g/l. For the suspension concentration of 3-10g/l, the optimum Taylor number decreased with an increase in suspension concentration. With these results a correlation of the optimum Taylor number was obtained as a function of the suspension concentration and the flocculant concentration. The resulting Camp number at optimum conditions was found to sctter in the range of 1.37×104-5.90×104.