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milk_HH

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液相中气泡大小主要取决于液相主体溶液的性质(浓度、表面活性)和分布器孔径尺寸,在本节中物系及其物系初始浓度已经确定前提下,液相中气泡大小主要受分布器孔径大小决定。在小分布器孔径下产生的气泡尺寸较小,由于小气泡的比表面积较大,并且上升过程中所受阻力要小,使得小气泡表面吸附总量和上升速度均大于大气泡,泡沫相中的持液量较高,这导致了富集比的下降。

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milk_HH(金币+5, 翻译EPI+1): 2011-10-18 07:58:30
The size of bubbles in liquid phase mainly depends on the properties (concentration, surface activity) of liquid phase main solution and size of distributor aperture. And, in this chapter, because the system and initial system concentration are determined, the size of bubbles in liquid phase basically depends on size of distributor aperture. The bubbles produced in small distributor aperture are small in size. Since the relative surface area of small bubbles is larger and the resistance is smaller when rising up, the total absorption amount of small bubbles and rising speed are bigger than large one. Therefore, the higher liquid hold in foam phase results in decrease of enrichment fraction.
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