Question
a.
Flights (located in the inside shell of rotary dryer) lift the material being dried and shower it down through the current of hot air/gases. It extends from the wall to a distance which is about 8-12% of the inside diameter of shell.
b.
Hold up of a rotary drier is defined as the fraction of the dryer volume occupied by the solid at any instant. The best performance for rotary drier is obtained, when the hold up is in the range of 0.05 to 0.15.
c.
Rotary dryer is suitable for drying sticky material.
d.
Recommended peripherial speed of a rotary drier is in the range of 10 to 30 metres/minute.
Posted under Mass Transfer Basic Chemical Engineering
Interact with the Community - Share Your Thoughts
Uncertain About the Answer? Seek Clarification Here.
Understand the Explanation? Include it Here.
Q. Pick out the wrong statement pertaining to the rotary dryer.
Similar Questions
Explore Relevant Multiple Choice Questions (MCQs)
Q. Pick out the correct statement.
View solution
Q. Very tall packed towers are divided into series of beds to
View solution
Q. Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture.
View solution
Q. With increase in temperature, the solubility of gases in liquids, at fixed pressure
View solution
Q. In most of the vacuum crystalliser, vacuum is generally produced by means of a
View solution
Q. In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of
View solution
Q. Wetted wall tower experiment determines the
View solution
Q. In McCabe-Thiele method, at infinite reflux ratio
View solution
Q. With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency
View solution
Q. Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the
View solution
Q. The equilibrium liquid composition compared to the vapor composition in case of azeotropic mixture is
View solution
Q. Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in __________ tower.
View solution
Q. Pick out the system with minimum boiling azeotrope at 1 atm.
View solution
Q. Free flowing granular materials can be best dried in a __________ drier.
View solution
Q. In case of an ideal solution, the total vapor pressure varies __________ with the composition expressed as mole fraction,
View solution
Q. Molarity is defined as the number of gm moles of solute per __________ of solvent.
View solution
Q. The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around
View solution
Q. An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored:
(i) a reboiler is used and
(ii) no reboiler is used but steam is fed directly to the bottom of the column.
As compared to option (i), in option (ii)
View solution
Q. The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an __________ law.
View solution
Q. Which of the following binary systems is an example of a maximum boiling azeotrope ?
View solution
Recommended Subjects
Are you eager to expand your knowledge beyond Basic Chemical Engineering? We've handpicked a range of related categories that you might find intriguing.
Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!
