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Questions and Answers
Which term refers to the final removal of water or other liquid?
Which term refers to the final removal of water or other liquid?
- Filtration
- Crystallization
- Evaporation
- Drying (correct)
What does drying mean?
What does drying mean?
- The process of converting liquids into dry powders
- The reduction in moisture content from an initial value to some acceptable final value (correct)
- The addition of moisture to a material
- The stabilization of moisture-sensitive materials
Why is drying carried out in some operations?
Why is drying carried out in some operations?
- To stabilize moisture-sensitive materials
- To remove water from the material completely
- To convert liquids into dry powders
- To improve handling characteristics (correct)
What are the three classifications of drying equipment based on their method of use?
What are the three classifications of drying equipment based on their method of use?
What is the purpose of a drum dryer?
What is the purpose of a drum dryer?
What is the purpose of drying in some operations?
What is the purpose of drying in some operations?
What is the classification of drying equipment that consists of a single heated drum supported on rollers?
What is the classification of drying equipment that consists of a single heated drum supported on rollers?
Which term refers to the reduction in moisture content from an initial value to some acceptable final value?
Which term refers to the reduction in moisture content from an initial value to some acceptable final value?
What are the two reasons why drying may be carried out?
What are the two reasons why drying may be carried out?
What are the two methods of use for drying equipment?
What are the two methods of use for drying equipment?
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Study Notes
Drying
- Drying refers to the final removal of water or other liquid
- Drying means the reduction in moisture content from an initial value to some acceptable final value
Reasons for Drying
- Drying is carried out in some operations to achieve two main objectives:
- To preserve the material by preventing spoilage or decay
- To make the material more convenient for storage, transportation, or further processing
Classification of Drying Equipment
- Drying equipment can be classified into three categories based on their method of use:
- Direct heat transfer equipment
- Indirect heat transfer equipment
- Specialized drying equipment
Drum Dryer
- A drum dryer is a type of drying equipment that consists of a single heated drum supported on rollers
- The purpose of a drum dryer is to dry materials such as liquids, slurries, or solids by spreading them onto the heated drum surface
Methods of Use for Drying Equipment
- Drying equipment can be used in two main ways:
- Continuously, where the material is fed continuously into the drying equipment
- Batch-wise, where a fixed amount of material is loaded into the drying equipment and dried in a single cycle
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