Gas-to-gas heat exchanger
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United States of America Patent
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Feb 1, 1983
Grant Date -
N/A
app pub date -
Mar 13, 1981
filing date -
Mar 13, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A gas-to-gas heat exchanger comprises a chamber through which pass upwardly at least one first tube for the passage of a first hot gaseous medium and at least one second tube for the passage of a second cooler gaseous medium. The first and second tubes are disposed in spaced-apart relationship and a fluidized bed of particulate material, for example sand, is created in the chamber in the spaces around the tubes, the fluidized bed serving as a heat transfer medium from the first tube(s) to the second tube(s). The heat exchanger, which is particularly suitable for preheating air by heat exchange with a hot, dust-laden gas, may comprise a plurality of the chambers disposed one above the other.
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