Triple-wall tube heat exchanger
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United States of America Patent
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-
Nov 27, 1990
Issued Date -
N/A
app pub date -
Jan 30, 1989
filing date -
Sep 5, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shell-and-tube exchanger for generating steam, comprising triple-wall tubes, each trible-wall tube including an inner tube, an outer tube and an intermediate porous layer of practically same length. The porous layer is connected to a leak detector for detecting leakage in the triple-wall tube. The triple-wall tubes penetrate and are welded to four tube sheets which define in the shell, steam outlet plenum, upper gas plenum, sodium plenum, lower gas plenum and water inlet plenum. The outer tubes have side holes in the gas plena, which communicate the gas plena to the intermediate porous layer.
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