INTEGRATED COOLING SYSTEM FOR HIGH- AND INTERMEDIATE- PRESSURE ROTORS OF STEAM REHEAT TURBINE

摘要

FIELD: cooling high-temperature rotors of steam turbines. SUBSTANCE: heat-transfer apparatus of system has direct-contact desuperheater and surface heat exchanger; direct-contact desuperheater whose inlet is connected to main-steam pipeline has tank with spray nozzles connected to feedwater pipeline and evaporating section downstream of it in the form of coil; surface heat exchanger is double-walled vessel whose space between walls communicates with pipeline for heat extraction from high-pressure cylinder that houses desuperheater coil. EFFECT: improved heat transfer augmentation, reduced steam flow that improves cooling system efficiency; reduced size of heat-transfer assembly. 1 cl, 3 dwgT