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

Claim 4:
5. A method for preventing ash adhesion in a coal-fired boiler comprising
a coal-ash generating step for ashing coal into coal ash,
a sintered-ash generating step for heating the coal ash generated in said coal-ash generating step 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 sticking-degree calculating step for rotatively separating each sintered ash generated in said sintered-ash generating step by a ratra tester to calculate a sticking degree from a weight ratio of the sintered ash after and before the rotary separation thereof,
a correlation determining step for burning each coal having a corresponding sticking degree calculated in said sticking-degree calculating step in the coal-fired boiler to measure an exhaust gas temperature to thereby determine a correlation between sticking degrees and exhaust gas temperatures and
a coal selecting step for selecting coal having a sticking degree as fuel so as to provide an exhaust gas temperature not higher than a set value on the basis of the correlation between the sticking degrees and the exhaust gas temperatures obtained in said correlation determining step.