7TH EUROPEAN COKE AND IRONMAKING CONGRESS - ECIC 2016

The cooking process in a Heat Recovery Coke Plant is founded on the burn of volatile matter, present on coal as primary fuel. A second unwanted reaction occurs by the combustion of coke. This undesired burning process is called Burn Loss. The amount of air sucked to the oven was controlled by an automatic system which open or close the valves using as main variable Time. During the control by Time various influences which occur in process are not considered, and consequently not all process potential to produce coke are used. The control developed by the maintenance, operation and technical unit team in TKCSA, named PID Combustion, was focused on a self-taught system, able to recognize the disturbs of the process and admit only the amount of air required for each oven. Mathematical, statistical calculations and the heat historical of the oven are evaluated by the PID Combustion which will optimize the mix of gas and air on the oven. The main benefits after deployment were: collectors temperature decrease (preservation of assets), oven production capacity increased (increase cooking speed) and suction optimization along the ovens in the same collector.