Heat exchanger, in which the supply of secondary fluid takes place in the upper part by means of an overflow
AssigneeFramatome
InventorChristophe Poussin
Life of this patent
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Abstract
In a heat exchanger such as a steam generator equipping a nuclear power station the secondary fluid is injected into the upper part of an annular space (30) formed between an outer envelope (10) and a bundle or core envelope (26) having a common vertical axis. Injection takes place by means of a supply pipe (44), which issues into an overflow or weir (62). The latter has an upper horizontal edge (64) from which the secondary fluid is discharged onto a deflecting wall (54). The secondary fluid flows along this wall towards the bottom of the annular space (30). A device (60) for trapping migrating bodies can also be placed in the overflow (62) or between the latter and the deflecting wall (54).
Claims13
Heat exchanger having an outer envelope and a bundle envelope with a common vertical axis and forming between them an annular space, a bundle of tubes housed within the bundle envelope, secondary fluid supply means located in an upper area of the annular space, and a supply pipe traversing the outer envelope and communicating with the secondary fluid supply means, wherein said supply means comprises:
- an overflow placed in said upper area of the annular space and extending over at least part of the circumference of said space, said overflow having a horizontal upper edge, the supply pipe issuing into the overflow entirely at a level below the level of said edge,
- a deflecting wall positioned in front of said edge and extending downwards and obliquely below said edge, so that the secondary fluid admitted into the overflow by the supply pipe and which is discharged over the edge flows downwards into said annular space along said deflecting wall.
Dependencies are inferred from the claim text.