The application discloses a method and a closed-
loop control system for monitoring, supervising and cleaning the ash
pollution of a heating surface of a power
plant boiler. The method comprises the following steps: setting an inner wall temperature measuring device or a wall temperature measuring point on a water-cooled wall of a furnace, setting a furnace endoscopic monitoring device, setting a
data collector, an exchange, an intelligent
server, a DCS
data interface card, providing a calculation and modeling method for various
pollution factors of the heating surface of the boiler, an overall average
pollution factor of the water-cooled wall of the furnace, a local area pollution factor and a single-side average pollution factor of the water-cooled wall, providing a method for establishing an ash cleaning economic model, an ash cleaning safety model, an ash cleaning comprehensive evaluation model and a closed-
loop control model, and setting a monitoring, supervising and monitoring picture. According to the method, a model is established in the intelligent
server or the DCS
system, a data reading module, a data preprocessing module and an intelligent ash cleaning
database are established, the monitoring, supervising and monitoring picture is set, a closed-
loop control system is constructed, the pollution state of the overall, single-side and local area of the heating surface and the water-cooled wall of the boiler, the state of an ash cleaner and a monitoring device and related parameters are monitored, supervised and monitored, the economy, safety and closed-loop control of the ash cleaning optimization of the boiler are realized, and the ash cleaning technology of various ash cleaners is suitable.