| 摘要 |
PROBLEM TO BE SOLVED: To stabilize steam temperature of an entire part of a boiler by substantially constantly controlling the outlet temperature of a furnace path with a simple circuit structure using existing signals without providing a pressure gauge and many thermometers. SOLUTION: The device for controlling the outlet temperature of a furnace path comprises a furnace path outlet temperature command circuit 27 for setting the outlet temperature of the furnace path on the basis of reference furnace path outlet temperature 29 obtained from a reference signal 26; and a furnace path outlet temperature correcting and calculating circuit 45 including a subtracter 49 for getting an opening degree deviation signal 50 by subtracting a reheater gas damper opening degree command signal 47 obtained by converting the reference signal 26 by a first function generator 46 from a reheater gas damper opening degree signal 48, a second function generator 51 for converting the opening degree deviation signal 50 to obtain an opening degree deviation signal 52 after a dead zone correction, an integrator 56 for integrating the signal 52 to obtain a temperature correction signal 57, and an adder 58 for adding the signal 57 to the reference furnace path outlet temperature 29.
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