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• Bubble cap trays are used primarily where large turndown ratios are required. Turndown ratio is the range of higest to the lowest flow rates.

• Their construction allows very low liquid rates to be handled with little or no leakage.

• Due to their ability to operate at low vapor and liquid rates, bubble cap trays are used in a significant portion of fractionation tray installations.

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11y ago
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11y ago

1.high entrainment

2.expensive

3.poor "turn down performance:

4.pressure drop is maximum

5.require high tray spacing

6.problem with cooking,highly fouling mixture

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11y ago

They keep vapour in the chamber so that it can be condensed and extracted.

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