Temperature and pressure control in large industrial pressure cookers (retorts) including recipe handling.

Local touch screen and central SCADA control of the process.

Extensive use of PID functions in Koyo PLC.

Berri Ltd. is a South Australian manufacturer of fruit juices and packaged foods. Three existing rotary retorts needed to be modified electrically, mechanically and process control wise to allow for the cooking of rice in small plastic containers. Existing Eurotherm control equipment is no longer supported and requires complete replacement.

The existing retorts ( large industrial pressure cookers) were initially designed for the cooking of food in cans. The new product (plastic containers) required a much improved control process. This included the redesign of the heating circuit (using steam) and the cooling circuit (using cold water). In addition all sensors such as level, temp and pressure, required replacement.

A new local and central control system was required to provide the ability to select and design cooking recipes. All previous control equipment required replacement with 3 retorts to share common control equipment.

Redesigning the process

Inspect and where required replace existing control valves.

Provide both local (touch screen) and central control

Completely rewire all 3 retorts

Design and build a new switchboard including all programming (PLC & MMI)

Factory acceptance testing

Site commissioning

Full documentation including a substantial amount of drawings.

Koyo 405 series PLC

10" colour QuickPanel by Total Control for local control

Klockner Moeller switchgear

Citect SCADA system

Temperature transmitters by S-Products

Power and current transducers by Faget