Focus on Designing Distillation Columns

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* 1. With regard to distillation column design, what does HETP stand for?

High-enthalpy thermal process

Height equivalent of theoretical plate

Height equivalent of trayed packing

High-efficiency tower packing

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* 2. What is the recommended design limit for the entrainment ratio of a column?

Less than 50%

Less than 25%

Less than 10%

Less than 1%

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* 3. True or false: The Downcomer flood factor mainly applies to column with trays.

True

False

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* 4. For designing new columns, what is a good rule of thumb for the limiting the flood ratios?

Design for 100%

Design for 85%

Design for 60%

Design for 25%

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* 5. Which type of column internal is likely to experience the largest pressure drop?

Trays

Random packing

Dumped packing

Structured packing

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* 6. Which of the following is not a measure of liquid accumulation in the column?

Flood ratio

Jet Flood

Downcomer Flood

Entrainment ratio