METHOD FOR ESTIMATING STABLE COMBUSTION BY COAL PROPERTY

摘要

PROBLEM TO BE SOLVED: To provide a method for estimating the stable combustion by the coal property in which the stable combustion in boiler can be maintained and the boiler can be stably operated even by a less experienced operator, etc., by the operating condition of a mill and the property of raw coal. ;SOLUTION: The ralationship between the coal supply, the temperature of the primary air, and the required ratio of the treatment water content of the raw coal is obtained in advance from the heat balance comprising a heat input consisting of the heat generation Q1 of a coal pulverizer, the quantity of retained heat Q2 of the coal supply, and the quantity of retained heat Q3 of the primary air volume heat input, and the heat output consisting of the quantities of retained heat Q4, Q5, Q6 of pulverized coal, air and steam to be fed to a boiler so that the temperature at the mill outlet is at least ≥60°C, and the temperature of the primary air and the allowable water content ratio of raw coal required for stable combustion of the boiler is determined from the relationship.;COPYRIGHT: (C)1998,JPO