WorksheetsDistillation_ERT318
Total questions: 10
Worksheet time: 10mins
Name one of the aspects that affect the equilibrium of vapor and liquid in distillation.
Feed type
Feed composition
Feed rate
Feed concentration
Overloading occurs when.......
feed rate is low
feed rate is high
feed rate is optimum
feed rate is within the range
When overloading occurs, ...... buildup on the tray and the rising......becomes severely blocked. This condition is known as......
liquid, vapor, flooding
vapor, liquid, flooding
liquid, vapor, blocking
vapor, vapor, pooling
Flooding may also caused by ______ too high, _______ too low, and _______ is excessive.
reflux temperature, reflux rate, vapor flow
reflux rate, distillate temperature, vapor flow
reflux temperature, reflux rate, liquid flow
reflux rate, reflux temperature, liquid flow
When the temperature of the bottom is too ______, too ________ liquid is vaporized, ____________occurs if the pressure from the vapor forces the liquid flow out of the column.
high, little, puking
high, much, pressuring
high, much, puking
low, much, puking
Indicators to identify overloading and flooding are ______
Column temperature and pressure
Receiver level (volume)
Differential pressure
Fluctuation in temperature and pressure of the column
Differential temperature
Ways to solve the overloading and flooding problem are:
Decrease feed rate
Increase reflux rate
Decrease reflux rate
Decrease bottom temperature
Increase bottom temperature
Reflux temperature may increase if cooling water has ____________
low flow rate and low temperature.
high flow rate and high temperature.
high flow rate and low temperature.
low flow rate and high temperature.
_________cools the top of the column, and helps condense heavier fractions
Distillate
Reflux
Bottom
Feed
Liquid returned to the column : Liquid sent to overhead storage is known as ........
reflux percentage
reflux rate
reflux ratio
reflux limit
