COMBINED-CYCLE GAS PLANT WITH A HEAT RECOVERY BOILER AND EVAPORATORS FOR INSTANT BOILING OF FEED WATER

Abstract

Combined-cycle gas plants (CCGT) with a heat recovery boiler (CU) are heat engines whoseefficiency is of the greatest importance (up to 57 %) compared to other types of heat engines,including, in particular, PTU, GTU, internal combustion engines. At present, some experience hasbeen accumulated in the operation of CCGT, which indicates the operational disadvantages of CCGT,in particular, the insufficiently high reliability of heat recovery boilers associated with the formationof scale on the heated surfaces of evaporators, leading to thermal and hydraulic deploymentof a system of parallel pipes with natural circulation of boiling water. The article considers the thermalscheme of a CCGT with CU and evaporators of instantaneous boiling of feed water, which allowsto eliminate these disadvantages.