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milk_HH金虫 (小有名气)
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[求助]
汉译英
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| 迄今为止大多数研究者所采用的是常规的垂直泡沫分离塔，在此塔的泡沫分离过程中，泡沫相的气泡沿着塔轴向由下向上运动，而气泡之间的部分液体（Plateau边界层和节点处）即内回流由上向下运动，气泡和内回流液体之间在泡沫相的整个高度内处于逆流状态，因此它们之间的流动阻力大。随着所分离组分浓度的增加特别是生物组分如蛋白质，流动阻力更大，造成泡沫相排液更为困难，塔内泡沫间隙液的流动速度在较高的持液量下达到平衡，从而难以提高泡沫分离的富集比。 |
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shrimp5555
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milk_HH(金币+10): 2011-10-21 08:46:23
| Until now what the majority researchers use is the conventional vertical froth separation tower, in this tower foam separation process, froth air bubble along tower axial by the under upward movement, but between the air bubble partial liquids (the Plateau boundary layer and node place) is the internal reflux by on downward movement, between the air bubble and the internal reflux liquid is at the adverse current condition in the froth entire altitude, therefore between them the flow resistance is big. Along with separates the component density to increase is the biological component like protein specially, the flow resistance is bigger, causes the froth to arrange the fluid to be more difficult, in the tower the froth gap fluid's flow rate in high holds the liquid volume to issue balanced, thus enhances the foam separation to concentrate the ratio with difficulty. |
3楼2011-10-20 17:16:01
fjtony163
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爱与雨下(金币+2): 2011-10-20 08:48:17
milk_HH(金币+15, 翻译EPI+1): 2011-10-20 10:30:41
爱与雨下(金币+2): 2011-10-20 08:48:17
milk_HH(金币+15, 翻译EPI+1): 2011-10-20 10:30:41
| So far, most researchers have adopted regular vertical foam separation column. During the process of foam separation, bubbles in foam phase move from bottom to top along the column axis and partial liquid between bubbles (Plateau boundary and nodes) moves from top to bottom, that is, inner flow. The bubbles and inner-flow liquid are in reverse flow in entire height of foam phase, so they experienced big flow friction. With separation concentration increasing, especially those biological components such as protein, the friction gets larger and draining of foam phase is harder. Then the speed of foam interspace liquid in column reaches balance in high liquid hold, so it is hard to raise enrichment ratio of foam separation. |
2楼2011-10-20 08:15:41
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