Although the coaling tonnage which at the time of the coal reserves in the time of mil normal

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for calculating the coal output during the normal stop of a mill of a coal-fired boiler capable of obtaining the coal output estimated to be supplied from the mill during the normal stop of the mill with excellent accuracy, preventing the coal exceeding the command value of the fuel flow rate from being supplied into a furnace of the boiler over the required value, and preventing reduction in the exhaust gas and the rise of the steam temperature. ;SOLUTION: The coal supply 11 at the time point when a coal feeder is stopped when a coal gate is closed is the signal 12 of the residual coal quantity, the signal 12 of the residual coal quantity is multiplied by the coal output simulated gain 34 to be given as the time function based on the preliminary test data to obtain the coal output simulated signal 21, and then as the output as the coal output 23 to be estimated to be outputted from a mill during the ordinary stop of the mill is outputted.;COPYRIGHT: (C)1998,JPO