ATOMIZING AIR HEAT FOR ATTEMPERATION

摘要

PROBLEM TO BE SOLVED: To integrate an attemperation system and an atomizing air system for a combined cycle turbine including a gas turbine and a steam turbine.SOLUTION: An atomizing air system 14 receives compressor discharge air 16 for fuel atomization. The atomizing air system 14 includes an atomizing air cooler 18 that serves to cool the compressor discharge air 16. A heat recovery steam generator 121 receives exhaust from the gas turbine 10 and generates steam to input it to the steam turbine 12 via an attemperation system that controls temperature of the steam. A feed water circuit draws feed water from the heat recovery steam generator 121 and communicates in a heat exchange relationship with the atomizing air cooler 18 to heat the feed water. The feed water circuit communicates the heated feed water to the attemperation system of the heat recovery steam generator 121.