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Chemical Engineering - Mass Transfer - Discussion

Discussion Forum : Mass Transfer - Section 2 (Q.No. 15)
Mass Transfer
15.
Pick out the wrong statement pertaining to the rotary dryer.
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.
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.
Rotary dryer is suitable for drying sticky material.
Recommended peripherial speed of a rotary drier is in the range of 10 to 30 metres/minute.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
5 comments Page 1 of 1.
Radhe said:   4 years ago
Rotary drier is used for non-sticky, free-flowing, granular material.
Abhishek mishra said:   5 years ago
Spray dryer can be used here.
Prashant said:   6 years ago
A rotary dryer is used for sticky material.
Vishal Tapiawala said:   7 years ago
Dryer is used for drying materials with a certain humidity.
Sakghi said:   7 years ago
Rotary drier is not for sticky material.
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