REHEAT STEAM TEMPERATURE CONTROLLER FOR BOILER

摘要

PROBLEM TO BE SOLVED: To provide a reheat steam temperature controller for boiler which can improve the controllability of the temperature of reheat steam when a load change occurs. SOLUTION: This reheat steam temperature controller for boiler is constituted in such a way that the controller finds the steam temperature difference 20 between the set temperature value 19 of steam at the outlet of a reheater and the detected temperature value 15 of the steam at the outlet of the reheater detected by means of a steam temperature detector 16 which detects the temperature of the steam at the outlet of the reheater and an opening command 17 issued to the gas damper 6 of the reheater for eliminating the difference 20. The controller also finds an opening correction command 29 issued to the damper 6 based on the load difference 28 between the present load 26 and a prenotified load 27. Then the controller outputs a corrected opening command 17' which is obtained by adding the command 29 to the correction command 17 to the gas damper 6 of a reheater.