Key Technologies for Boilers Economic Operation by Implementing Bidirectional Intelligent Control of Primary Air Pressure
Coal mills in boiler power plants adopt positive pressure direct blowing pulverizing system,which are generally inferior in measurement accuracy of primary air volume and consequently prevent the automatic primary air volume control system from proper activation.In view of the actual demand for primary air control of the 1000 MW unit of Shenhua Jiu-jiang company,the present work studied key technologies for boilers economic operation based on bidirectional intelligent control of primary air pressure and designed an intelligent control system suitable for primary air volume optimization un-der the operating conditions such as intense peak shaving and full load.The proposed technologies help in increasing hot air valves'opening extents while maintaining AGC of the unit and providing stable primary air volumes of individual boil-ers,thereby reducing loss of primary air pressure,and effectively suppressing power consumption of primary fans and coal consumption.
direct blowing pulverizing systemprimary air pressureenergy saving