Case Study 126: Oven Control Baking
Industry Sector: Food & Beverage
Cereal Conveyor Dryer

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NEW TECHNOLOGY APPLIED:
Allen Bradley CompactLogix
Allen Bradley Panelview Plus HMI

PROJECT DESCRIPTION:
Staneco Corporation designed a PLC panel for a multiple pass, multiple stage industrial dryer to process cereal. The drying process consisted of several stages which were heated by natural gas burners. Each stage consisted of exhaust and combustion blowers that were started automatically by the PLC. The burner ignition was controlled by Honeywell flame relays. The material was carried through the dryer using bed conveyors that were interlocked in reverse sequence to prevent product build-up when a stoppage occurred. Bed conveyors were controlled with VFDs. Temperatures of the dryer stages were controlled by PID control loops in the PLC.

PROJECT OUTCOME:
The control system with sequential heat zones allowed for precise control of temperature and humidity reducing product moisture variability. The advanced control functions increased energy efficiency by monitoring and optimizing the thermal equipment operating conditions.

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Food & Beverage: Oven Control Baking