Modeling the Total Residence Time in a Rotary Dryer
-
Zhi-Gang Huang
,
Yun-Xuan Weng
Abstract
A mathematical model for the rotary dryer that determines the total residence time is developed. Experiments were performed in a laboratory-scale direct contact rotary dryer with the gas flowing concurrently with the solids. The model predictions depicted that the total residence time decreases with increasing the inclination of the rotary drum, the speed of rotation and the radius of rotary drum. The validation of the model was carried out experimentally for maize while varying the inclination of the rotary drum and the speed of rotation. The experimental results were observed to be in good agreement with the model predictions.
Nomenclature
- h
Flight holdup (m3)
- L
Drum length (m)
- l
Distance between central axis and the point where cascading begins (m)
- N
Speed of rotation (rpm)
- n
Number of cascades
- s
The distance of longitudinal advance per cascade (m)
- α
Inclination of rotary drum (degrees)
- θi
Peripheral flight angle when cascading begins (degrees)
Acknowledgments
This research was supported by the Science and Technology Development Planning Program of Beijing Municipal Education Committee (No. KM200710011005).
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Articles in the same Issue
- Frontmatter
- Soft Tofu-Type Gels: Relationship between Volatile Compounds and Sensory Characteristics as Affected by Coagulants and Raw Materials
- Preparation and Characterization of Genipin-Crosslinked Chitosan Microspheres for the Sustained Release of Salidroside
- A Numerical Approach to Determine Some Properties of Cylindrical Pieces of Bananas During Drying
- Pasting, Textural and Sensory Characteristics of the Kofter, A Fruit-Based Dessert: Effect of Molasses and Water Concentration
- Microwave-Assisted Extraction of Phenolic Compounds from Dried Waste Grape Skins
- Effect of Cooking Temperature on Mineral Content and Anti-nutritional Factors of Yam and Taro Grown in Southern Ethiopia
- Isolation of Linoleic Acid from Sambucus williamsii Seed Oil Extracted by High Pressure Fluid and Its Antioxidant, Antiglycemic, Hypolipidemic Activities
- Comparison of Artificial Neural Network and Response Surface Methodology Performance on Fermentation Parameters Optimization of Bioconversion of Cashew Apple Juice to Gluconic Acid
- Modeling the Total Residence Time in a Rotary Dryer
- Optimization of Spray Drying Process Parameters for Sweet Corn Enzymolysis Liquid
- Hot Air Drying Characteristics of Sukkari Date (Phoenix dactylifera L.) and Effects of Drying Condition on Fruit Color and Texture
- Effects of Air-Impingement Jet Drying on Drying Kinetics, Nutrient Retention and Rehydration Characteristics of Onion (Allium cepa) Slices
