BOILER REHEATING STEAM TEMPERATURE CONTROL DEVICE AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide a boiler reheating steam temperature control device having good controllability without deteriorating turbine efficiency.;SOLUTION: The boiler reheating steam temperature control device performs the temperature control of a reheater 14 of a boiler by using a reheater outlet damper 15 and an temperature reducer spray water flow rate adjusting valve 17 based on deviation between the outlet temperature of a superheater of the boiler and the outlet temperature of the reheater. The boiler reheating steam temperature control device is equipped with an temperature reducer spray water flow rate control part 20 for adjusting a temperature reducer spray water flow rate by the temperature reducer spray water flow rate adjusting valve 17, and a reheater outlet damper control part 19 for adjusting an opening of the reheater outlet damper so that an opening command of the temperature reducer spray water flow rate adjusting valve 17 is zero and controlling a reheater outlet steam temperature to a set value.;COPYRIGHT: (C)2007,JPO&INPIT