Abstract: Provided is a correlation deriving method including the steps of: generating coal ash by incinerating coal; generating sintered ash by heating the coal ash at a predetermined heating temperature within a range of a combustion temperature of a coal burning boiler; measuring hardness of the sintered ash; measuring an exhaust gas temperature exhibited when coal which is to have the hardness is burnt in the coal burning boiler; and deriving a correlation between the hardness and the exhaust gas temperature.

Abstract: Conducted are coal-ash generating step for generating coal ash, sintered-ash generating step for heating the coal ash at temperatures within combustion temperature range of coal-fired boiler to generate sintered ash at each heating temperature, sticking-degree calculating step for rotatively separating each sintered ash by ratra tester to calculate sticking degree from weight ratio of each sintered ash after and before the rotary separation of the sintered ash, correlation determining step for burning each coal having corresponding sticking degree calculated to measure exhaust gas temperature and obtain correlation between sticking degrees and exhaust gas temperatures, exhaust-gas-temperature predicting step for predicting exhaust gas temperature from sticking degree of coal to be employed as fuel based on the correlation between the sticking degrees and the exhaust gas temperatures and adhesion predicting step for predicting ash adhesion in the coal-fired boiler based on the exhaust gas temperature predicted

Abstract: Provided is an abnormality detection device, including: a data acquisition unit configured to acquire operation data of one or a plurality of extraction devices configured to extract water from a water circulation system in a boiler to an outside of the circulation system, and acquire an actually measured value of a makeup water amount supplied to the circulation system; a prediction unit configured to derive a predicted value of the makeup water amount based on the operation data acquired by the data acquisition unit; and a comparison unit configured to compare the actually measured value of the makeup water amount, which is acquired by the data acquisition unit, and the predicted value of the makeup water amount, which is derived by the prediction unit, with each other.

Abstract: Provided is a correlation deriving method including the steps of: generating coal ash by incinerating coal; generating sintered ash by heating the coal ash at a predetermined heating temperature within a range of a combustion temperature of a coal burning boiler; measuring hardness of the sintered ash; measuring an exhaust gas temperature exhibited when coal which is to have the hardness is burnt in the coal burning boiler; and deriving a correlation between the hardness and the exhaust gas temperature.

Abstract: An anomaly detection device detects an abnormal condition of a coal-fired boiler and includes a correlation calculating unit to acquire an index representing a correlation between a first parameter and a second parameter, the first parameter that is any one of a power generation amount and a first physical quantity, and the second parameter that is any one of a pressure of an exhaust gas and a second physical quantity and an anomaly determination unit configured to detect the abnormal condition in a case in which the index deviates from a predetermined range.

Abstract: Conducted are coal-ash generating step for generating coal ash, sintered-ash generating step for heating the coal ash at temperatures within combustion temperature range of coal-fired boiler to generate sintered ash at each heating temperature, sticking-degree calculating step for rotatively separating each sintered ash by ratra tester to calculate sticking degree from weight ratio of each sintered ash after and before the rotary separation of the sintered ash, correlation determining step for burning each coal having corresponding sticking degree calculated to measure exhaust gas temperature and obtain correlation between sticking degrees and exhaust gas temperatures, exhaust-gas-temperature predicting step for predicting exhaust gas temperature from sticking degree of coal to be employed as fuel based on the correlation between the sticking degrees and the exhaust gas temperatures and adhesion predicting step for predicting ash adhesion in the coal-fired boiler based on the exhaust gas temperature predicted