The article discusses how to control combustion in a steam boiler plant to reduce harmful emissions. By monitoring exhaust components like NOx and CO, complete combustion can be achieved. The researchers added a limiter for exhaust components to the control loop, alongside steam pressure control. They automated the boiler operation to maintain a specific temperature using air preheaters and economizers. The control system includes level, pressure, and flow control, with constant monitoring through a SCADA system connected to a PLC. The SCADA system helps in creating a Human Machine Interface for efficient control of the steam boiler plant.