Investigation in Moisture On-line Monitoring for Utility Boiler Firing Coal Basing on Milling System Operation Parameters Measurement

This paper presented a model of monitoring coal moisture for utility boiler basing on milling system operation parameters measurement, relying on measurements of milling capacity, air flow and air temperature of mills, this model carry out coal moisture monitoring in real time, it is special for utility boiler equipped with direct firing system. The application on site shows that the divagation of the calculated moisture is 5% when the operation parameters is accurately measured.