Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 - 1.4 cp and relative volatility < 4) (where η = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi)

Process Equipment and Plant Design
Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 - 1.4 cp and relative volatility < 4) (where η = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi)

Η = 24.6 (Δp/μ)

Η = 1.66 - 0.25 log μ

Η = 17 - 61.1 log μ

Η = 0.25 log μ - 1.67

Η = 24.6 (Δp/μ)

Η = 1.66 - 0.25 log μ

Η = 17 - 61.1 log μ

Η = 0.25 log μ - 1.67

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Process Equipment and Plant Design
__________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Split flow

Radial flow

Cascade

Cross flow

Split flow

Radial flow

Cascade

Cross flow

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Process Equipment and Plant Design
When one of the fluids is highly corrosive and has fouling tendency, it should

Preferably flow inside the tube for its easier internal cleaning

Perferably flow outside the tube

Flow at a very slow velocity

Flow outside the tube, when the flow is counter-current and inside the tube when the flow is co-current

Preferably flow inside the tube for its easier internal cleaning

Perferably flow outside the tube

Flow at a very slow velocity

Flow outside the tube, when the flow is counter-current and inside the tube when the flow is co-current

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Process Equipment and Plant Design
The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

0.4-0.9

1.2-1.5

0.2-0.5

0.1-0.2

0.4-0.9

1.2-1.5

0.2-0.5

0.1-0.2

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is

None of these

Called tube pitch

Called tube clearance

Always less than the diameter of the tube

None of these

Called tube pitch

Called tube clearance

Always less than the diameter of the tube

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Process Equipment and Plant Design
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.

12.5

17.5

2.5

5

12.5

17.5

2.5

5

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Process Equipment and Plant Design

Process Equipment and Plant Design __________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Process Equipment and Plant Design When one of the fluids is highly corrosive and has fouling tendency, it should

Process Equipment and Plant Design The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

Process Equipment and Plant Design In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is

Process Equipment and Plant Design In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.

Process Equipment and Plant Design
__________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Process Equipment and Plant Design
When one of the fluids is highly corrosive and has fouling tendency, it should

Process Equipment and Plant Design
The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

Process Equipment and Plant Design
In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is

Process Equipment and Plant Design
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.