ONCE-THROUGH STEAM GENERATOR START UP METHOD AND ONCE-THROUGH STEAM GENERATOR USED FOR METHOD REALISATION

摘要

FIELD: heating systems. ^ SUBSTANCE: invention is intended for steam generation and can be used in power engineering. In a once-through steam generator, in a flue gas duct passing approximately in horizontal direction of flue gas there arranged is an evaporating once-through heating surface which consists of many in-parallel connected steam-generator tubes meant for fluid medium passage, and a superheating surface which is connected after evaporating once-through heating surface and consists of many in-parallel connected superheating tubes meant for passage of evaporated fluid medium. Evaporating once-through heating surface and superheating surface are combined in a single functional unit so that end point of evaporation of fluid medium is offset to superheating surface. There described is once-through steam generator start-up method according to which end point of evaporation of fluid medium is offset for some time to superheating pipes. ^ EFFECT: providing simple and prompt coordination of steam generator outlet steam temperature with turbine operating mode. ^ 14 cl, 2 dwg