Counterflow tubular heat exchanger having center pipe...

Details Counterflow tubular heat exchanger having center pipe... Counterflow tubular heat exchanger having center pipe...

F - Mech Eng,Light,Heat,Weapons

28

D

257/15

F28D 7/00 (2006.01) F28D 7/16 (2006.01)

Patent

CA 1249583

ABSTRACT A tube type counterflow heat exchanger adapted for high temperature service. The heat exchanger contains a tube bundle having a central pipe construction used for intro- ducing a hot inlet gas into the exchanger, so as to minimize the temperature to which the primary pressure boundary shell is exposed and also cause minimal differential thermal contraction of the tube bundle. An annular space containing a thermal sleeve is provided between the center pipe and the tube bundle inner shell for passage of a minor flow of gas therethrough to heat the inner shell and thus minimize the temperature difference existing between the inner shell and the tubes. Any excessive differential expansion which occurs between the inlet end tube sheet and inner shell is accommodated by an expansion joint.

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