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 = 0.25 log μ - 1.67

Η = 1.66 - 0.25 log μ

Η = 24.6 (Δp/μ)

Η = 17 - 61.1 log μ

Η = 0.25 log μ - 1.67

Η = 1.66 - 0.25 log μ

Η = 24.6 (Δp/μ)

Η = 17 - 61.1 log μ

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Process Equipment and Plant Design
In chemical process equipments, the conical bottom heads used, usually has an apex angle of

80°

60°

40°

20°

80°

60°

40°

20°

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Process Equipment and Plant Design
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

Increases

Decreases

May increase or decrease depending upon the plate spacing

Remains same

Increases

Decreases

May increase or decrease depending upon the plate spacing

Remains same

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Process Equipment and Plant Design
A stuffing box is used for

Reducing the resistance of fluid flow

Prevention of fluid leakage around moving parts

Absorbing the contraction/expansion of pipeline due to temperature changes

Facilitating smooth opening and closing of a valve

Reducing the resistance of fluid flow

Prevention of fluid leakage around moving parts

Absorbing the contraction/expansion of pipeline due to temperature changes

Facilitating smooth opening and closing of a valve

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Process Equipment and Plant Design
The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the __________ stress.

Yield point

None of these

Breaking

Ultimate

Yield point

None of these

Breaking

Ultimate

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Process Equipment and Plant Design
What is the slope of the operating line in the stripping section of a distillation column?

< 1

?

> 1

< 1

?

> 1

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Process Equipment and Plant Design

Process Equipment and Plant Design In chemical process equipments, the conical bottom heads used, usually has an apex angle of

Process Equipment and Plant Design Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

Process Equipment and Plant Design A stuffing box is used for

Process Equipment and Plant Design The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the __________ stress.

Process Equipment and Plant Design What is the slope of the operating line in the stripping section of a distillation column?

Process Equipment and Plant Design
In chemical process equipments, the conical bottom heads used, usually has an apex angle of

Process Equipment and Plant Design
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

Process Equipment and Plant Design
A stuffing box is used for

Process Equipment and Plant Design
The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the __________ stress.

Process Equipment and Plant Design
What is the slope of the operating line in the stripping section of a distillation column?