Once through sliding pressure steam generator

Details Once through sliding pressure steam generator Once through sliding pressure steam generator

F - Mech Eng,Light,Heat,Weapons

22

D

122/64

F22D 7/00 (2006.01) F22B 29/10 (2006.01) F22B 35/12 (2006.01)

Patent

CA 1141610

ONCE THROUGH SLIDING PRESSURE STEAM GENERATOR Abstract of the Disclosure A once through steam generator (10) for sliding pressure operation from supercritical pressure at high loads into the sub- critical range at low loads, having vertical tubes (14) lining the furnace (12) walls and passing their entire length without a mixing header. The furnace tubes are internally rifled and have orifices (47) associated with them to proportion the flow at full load. A steam separator (26) receiving effluent from the tubes sends steam to the superheater (70) and at low ratings returns water (32,40) to the tubes for recirculation therethrough. The tubes (14) are sized in accordance with a specified criteria based on the mass flow rate at full load, or on the ratio of friction drop to static head. C790870

354600

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