Industrial technique专利检索-冷却剂回路核能专利检索查询-专利查询网

Industrial technique

阅读：941发布：2022-11-29

专利汇可以提供Industrial technique专利检索，专利查询，专利分析的服务。并且An illustrative embodiment of the invention shows an heat exchanger for converting the secondary coolant feedwater in a nuclear power reactor system into superheated steam. The tube sheet adjacent to the feedwater inlet nozzle is protected from thermal shock by discharging the feedwater directly into the economizer and establishing a controlled secondary coolant flow or leakage from the economizer along the terminal portion of the tube bundle to the tube sheet. The heat absorbed in the secondary coolant flowing toward the tube sheet raises the coolant temperature and protects the sheet from thermal shock. The secondary coolant that collects between the economizer and the adjacent tube sheet, moreover, can be reintroduced to the tube bundle or bled from the secondary coolant loop.，下面是Industrial technique专利的具体信息内容。

权利要求

1. A heat exchanger comprising a longitudinally disposed tube bundle, a tube sheet for anchoring said tube bundle, a feedwater inlet conduit spaced from said tube sheet, an economizer spaced from said tube sheet, said economizer having a shroud, a plurality of longitudinally spaced plates are disposed generally transverse to said tube bundle within said shroud, one of said plates being adjacent to and spaced from said tube sheet and having a plurality of holes formed therein to enable said bundle of tubes to pass therethrough, said separation between said tube sheet and said adjacent economizer plate establishing a space therebetween, each of said economizer plate holes and said respective tubes providing individual clearances to enable feedwater to flow into said established space between said tube sheet and said adjacent economizer plate, said space established between said tube sheet and said adjacent economizer plate providing a volume for generating a steam pressure therewithin that effectively prevents the feedwater from flowing through said clearances from producing destructive thermal stresses in said tube sheet, a skirt extending from said shroud and enclosing the space established between said tube sheet and said economizer plate said skirt depending longitudinally from said shroud into said space between said plate and said tube sheet to regulate the flow of fluid from the space, said skirt having at least one orifice formed therein to promote fluid discharge from the space, and conduit means within the heat exchanger for readmitting fluid from the space between said adjacent economizer plate and said tube sheet to said tube bundle.

2. A heat exchanger according to claim 1 further comprising means for discharging feedwater from the space established between said tube sheet and said adjacent economizer plate.

3. A heat exchanger according to claim 2 wherein said discharging means further comprises valve means for selectively discharging fluid from the space between said adjacent economizer plate and said tube sheet.

说明书全文

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