Industrial technique

Details Industrial technique Industrial technique

1975-08-08

1977-11-08

Sprague, Kenneth W.

Liquid heaters and vaporizers

Indirectly heated

Separate fluid

122438, F22B 106, F22D 100

Patent

active

040570339

ABSTRACT:
An illustrative embodiment of the invention eliminates the circumferential thermal stresses found in a feedwater inlet nozzle of a once-through-vapor generator that are caused by the presence of steam in the nozzle during a low flow load condition. Specifically, The cold inlet feedwater is directed upwardly to fill and overflow the nozzle conduit and prevent steam entrance and collection in the nozzle, and then, impinges on a shroud which re-directs the flow downward into fluid flow contact with the nozzle conduit and through the vapor generator.

REFERENCES:
patent: 210846 (1878-12-01), Ford
patent: 232342 (1880-09-01), Fulton
patent: 3262428 (1966-07-01), Romanos
patent: 3483848 (1969-12-01), Green
patent: 3635287 (1972-01-01), Sprague
patent: 3661123 (1972-05-01), Romanos
patent: 3766892 (1973-10-01), Webster
patent: 3916843 (1975-11-01), Bennett

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