Steam generator专利检索-压水反应堆核能专利检索查询-专利查询网

Steam generator

阅读：379发布：2021-02-17

专利汇可以提供Steam generator专利检索，专利查询，专利分析的服务。并且A pressurized-water reactor steam generator has a vertical casing with its bottom closed by a tube plate in which the two legs of a U-tube bundle heat exchanger, are mounted, the bundle being encircled by a shroud forming between it and the casing''s inside, a descent space with which the top and bottom of the shroud communicates, feed water in the casing rising inside of the shroud while vaporizing, and descending through the descent space, the feed water in the casing being thus in continuous circulation. The two bundle legs (each have a generally semicylindrical contour) having flat interfacing sides, forming a corridor extending for the width of the tube bundle and vertically from the tube plate up to the tube return bends of the innermost tubes of the tube bundle. A duct is formed in this corridor by interspaced partitions which extend between the inside of the shroud, the bottom of the duct being made in the form of a funnel which opens generally centrally above the central portion of the tube plate, the shroud being slotted so that the duct is horizontally open down to the beginning of the funnel. This duct forms a second descent space internally within the tube bundle and down through which some of the descending water can flow and be funneled to the central portion of the tube sheet.，下面是Steam generator专利的具体信息内容。

权利要求

1. A steam generator comprising an upstanding casing having a lower portion, a tube plate closing said portion, a U-tube bundle heat exchanger inside of said casing and having upstanding legs with lower ends mounted in said plate, said bundle having a top forMed by return tube bends joining said legs at said top and said legs forming flat-interfacing upstanding interspaced sides defining an upstanding corridor between the legs below said top, a shroud having an open top and bottom encircling said bundle inside of said casing and forming an annular descent space between the shroud and the inside of said casing, the bottom of said shroud being spaced adjacently above said plate, means below said plate for passing a primary fluid through said bundle, means for introducing feed-water into said casing, a steam outlet for said casing, and interspaced, upstanding walls enclosing said corridor within and with respect to said flat sides of the tube bundle but leaving said corridor open adjacently above said tube plate, said walls extending transversely between and connecting with said shroud and the shroud having openings above said plate and connecting said corridor between said walls, with said descent space.

2. The generator of claim 1 having means for forming a funnel for said corridor between said walls and above said plate and having an outlet mouth substantially over the center of the plate.

3. The generator of claim 2 in which said funnel-forming means comprise two downwardly converging baffle plates extending between said walls and with bottom ends adjacent to said plate, said openings in said shroud comprising slots formed longitudinally in the shroud from the upper ends of said walls down to the upper ends of said baffle plates.

4. The generator of claim 3 in which means forming down-flow restrictors are positioned in said annular descent space at a level adjacent to the upper ends of said downwardly converging baffle plates.

5. The generator of claim 3 in which said walls extend down substantially to said tube plate and said outlet mouth for said tunnel is formed by openings through said walls adjacent to said plate and facing said legs.

6. The generator of claim 5 in which one of said legs of said tube bundle is a hot leg and the other is a cold leg and the one of said openings facing said hot leg is larger than the one of the openings facing the cold leg.

7. The generator of claim 6 in which the bottom edges of said shroud and said walls above said openings have inwardly extending flanges.

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Steam generator

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