Dryers

Dryers

Process Variables

Temperature, Drying Period, Surrounding Temperature.

Input Variables 

Feed Flow, Input Temperature of Dry Air, Input Moisture of Solid and Feed Flow .

Output Variables 

Dred Product Moisture Content, Exhaust Air Temperature, The Temperature of Air Product  mixture (for spray dryers), Exhaust air Humidity, Product Quality,

Control Objectives 

maintenance of Dried Product Quality, Maxima of throughout of optimal, Energy efficiency and minimum cost, Stability of process.

Manipulated Variables 

Heating rate (e.g., inlet air or steam temperature), Solids feed rate (e.g., screw conveyor speed, discharge rate), Airflow rate (for direct dryers), Rotational speed (for rotary dryers)