Heat exchanger tube support structure

Induced nuclear reactions: processes – systems – and elements – Reactor structures – Circulating fluid within reactor

Reexamination Certificate

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Details

C376S402000, C376S404000, C376S406000, C376S441000, C376S442000, C122S032000, C122S510000, C165S158000, C165S159000, C165S161000, C165S162000

Reexamination Certificate

active

06914955

ABSTRACT:
A support plate for retaining tube array spacing within a heat exchanger tube and shell structure. The support plate having a plurality of individual tube receiving apertures formed therein. Each aperture has at least three inwardly protruding members and bights are formed therebetween when the tube associated therewith is lodged in place to establish secondary fluid flow through the support plate. The inwardly protruding members terminate in flat lands that restrain but do not all contact the outer surface of the respective tube. These flat lands minimize fretting wear and eliminate potential gouging of the outer wall of the tube. The plate wall forming each aperture has an hourglass configuration which, inter alia, reduces pressure drop, turbulence and local deposition of magnetite and other particulates on the support plates.

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