Fire Detection and Quenching: CO monitors can detect smoldering fires. Fire suppression systems, like water mist or foam deluge, are installed in bunkers, mills, and filters.
Equipment Design: All equipment is electrically grounded to prevent static spark ignition. Mills and pipes are designed without dead zones where coal can accumulate.
Automation Control System Design integrates these safety features into a seamless operational layer. A central Distributed Control System (DCS) or Programmable Logic Controller (PLC) governs the entire sequence:
Sequential Start/Stop: The system follows a strict logic, e.g., starting the exhaust fan first to establish airflow, then the mill, then the feeder—all while monitoring permissives like bearing temperature and damper positions.
Regulatory Control: It maintains set points for mill outlet temperature (by blending hot and cold primary air), mill differential pressure (indicative of coal inventory), and primary air flow. These loops adjust dampers and feeder speed continuously.
