fundamental of spray drying Flashcards
Understand and memories the step
Why we need to prepare liquid feed while feed preparation?
So that it can effectively atomized during atomization?
What happened during atomization
Feed liquid converted into small droplets
what are the common method for atomization
Two-fluid nozzle atomization
Pressure nozzle atomization
Rotary atomization
Explain what happened in drying chamber
Atomized droplets come contact with hot air or drying gas
Why drying chamber is designed like that?
To allow for efficient heat and mass transfer.
The heat source can be provided by……
Hot air
Nitrogen
Other gases
What happened once the droplet are dried?
The resulting powder is collected
The uses of cyclone or bag filtered are
For powder separation from drying gas
What are several parameter that need to be controlled and optimal during spray drying
inlet air temperature
Outlet air temperature
Feed rate
Atomization pressure
Residence time
What are the powder characteristics of the final powder that can be influenced by adjusting the process parameter?
Particle size distribution
Morphology
Moisture content
Scale-up consideration requires
Careful consideration of various factors including equipment design, heat and mass transfer scaling
What are the applications of spray drying in food industry
Instant coffee and tea
Dairy products
Spices and flavourings
Energy efficiency
Optimization of heat recovery systems and process integration
