Collection Main Predictive Maintenance

Coke oven main pressure control is a critical control application for the safe operation of coke making. A plant’s actuator not only must position the cross-over valve to achieve a pressure of 12+/-1 mmWC, but it must avoid pressure spikes from volatile gases soon after coal charging, as shown in Figure 1. If the actuator is slow to respond, the collection main and coke oven gas pressure will increase and leak toxic gas at the oven doors. If the actuator overshoots, the coke oven pressure can decrease to a vacuum, entering oxygen in air which ignites in the over. Both
pressure scenarios present major safety concerns.