METHOD FOR PREDICTING/EVALUATING ADHESION OF COMBUSTION ASH

To provide a method for predicting/evaluating the adhesion of combustion ash, capable of greatly reducing time and labor required to evaluate adhesion of combustion ash in a coal-fired boiler.SOLUTION: A method for predicting/evaluating the adhesion of combustion ash in a coal-fired boiler using pulverized coal as fuel, comprises: obtaining a liquid phase ratio by thermodynamic equilibrium calculation based on the composition of the combustion ash (liquid phase ratio calculation step S1); estimating the degree of agglutination of the combustion ash from the calculated liquid phase ratio in light of the correlation between the liquid phase ratio and the degree of agglutination (agglutination degree estimation step S2); and evaluating the adhesion of combustion ash in the coal-fired boiler based on the estimated degree of agglutination (adhesion evaluation step S3).SELECTED DRAWING: Figure 1 【課題】石炭焚ボイラにおける燃焼灰の付着性を評価する上で必要な労力や時間を従来よりも大幅に削減することが可能な燃焼灰の付着予測評価方法を提供する。【解決手段】微粉炭を燃料として用いる石炭焚ボイラにおける燃焼灰の付着性を予測して評価する方法に関し、燃焼灰の組成に基づき熱力学平衡計算により液相率を求め（液相率算出工程Ｓ１）、その算出された液相率から液相率と膠着度の相関関係に照らして前記燃焼灰の膠着度を推定し（膠着度推定工程Ｓ２）、その推定された膠着度に基づき前記石炭焚ボイラにおける燃焼灰の付着性を評価する（付着性評価工程Ｓ３）。【選択図】図１