1. By Finn Aakre Haugen (finn.haugen@usn.no)
Course IIA1117 Control Engineering Fall 2017
Plant-wide control
By Finn Aakre Haugen
USN. IIA1117 Control Engineering. Haugen

2. General specifications for plantwide control:2
General specifications
for plantwide control:
Product flow is controlled (to follow a setpoint) . Note: Implement only one (1) flow control loop in the line!
Product quality is controlled (automatic control not always possible).
Mass balance of liquid and/or gas of each process vessel (tank, reactor, etc.) is maintained.
Temperatures in certain process flows and vessels are controlled.
USN. IIA1117 Control Engineering. Haugen

3. Principal plant with control structure3
USN. IIA1117 Control Engineering. Haugen

4. USN. IIA1117 Control Engineering. Haugen. 2017.
Example: Nitric acid plant (simplified) 4
USN. IIA1117 Control Engineering. Haugen