Patent ID: 11898751
Assignee: IHI CORPORATION
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F

Claim 10:
11. A device for operating a coal-fired boiler comprising
a coal-ash generator for ashing coal into coal ash,
a sintered-ash generator for heating the coal ash generated in said coal-ash generator at a plurality of temperatures within a combustion temperature range of the coal-fired boiler to generate sintered ash at each of the heating temperatures,
a ratra tester for rotatively separating each sintered coal generated in said sintered-ash generator,
a sticking-degree calculator for calculating sticking degree from weight ratio of each sintered ash after and before the rotary separation thereof by said ratra tester,
a correlation determiner for burning each coal having a corresponding sticking degree calculated in said sticking degree calculator in the coal-fired boiler to measure an exhaust gas temperature to thereby determine a correlation between sticking degrees and exhaust gas temperatures,
an exhaust-gas-temperature predictor for predicting an exhaust gas temperature from a sticking degree of coal to be employed as fuel on the basis of the correlation between the sticking degrees and the exhaust gas temperatures obtained in said correlation determiner and
a combustion-time adjuster for adjusting a combustion time of said coal on the basis of the exhaust gas temperature predicted in said exhaust-gas-temperature predictor.