High temperature heat exchanger having porous tube sheet portion

Details High temperature heat exchanger having porous tube sheet portion High temperature heat exchanger having porous tube sheet portion

1979-06-18

1981-07-21

Richter, Sheldon J.

Heat exchange

Expansion and contraction relieving or absorbing means

Relieving or absorbing means supports temperature modifier...

165139, 165158, 165178, 165DIG10, F28F 904

Patent

active

042792932

ABSTRACT:
A high temperature tube and shell vertically positioned heat exchanger including a plurality of tube sheets dividing the interior of the shell into three consecutive chambers. Ceramic tubes are vertically hung from hemispherical seats in an upper tube sheet and extend downwardly through loose fitting porous inserts which line perforations in the lower tube sheets. A hot fluid flows from the bottom chamber upwardly through the ceramic tubes, a cool fluid flows through the upper chamber across the tubes, and a third fluid is injected into the intermediate chamber at a pressure higher than that of the fluid mediums in the upper and lower chambers. The third, high pressure fluid flows through the porous inserts and into the other chambers forming a dynamic seal which also allows unrestricted axial motion of the tubes and limited laterial motion of the bottom of the tubes.

REFERENCES:
patent: 2834581 (1958-05-01), Schefels et al.
patent: 3610328 (1971-10-01), LaRue et al.
patent: 3974022 (1976-08-01), Lauro
patent: 4173615 (1979-11-01), Otsuka et al.
patent: 4224982 (1980-09-01), Frei

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