Heat exchangers with tube bundles

Claim 1

A heat exchanger for heat-transfer between substances of high pressure difference, said heat exchanger including a shell; a region through which a pertaining cooler substance is conveyed; an inlet for said cooler substance; a bundle of tubes arranged in a cooler substance compartment; and riser conduit means operatively connectible to said shell and communicating with said compartment, with the substance to be cooled being passed through the pertaining tubes having a predetermined high temperature at the pertaining inlet end of said heat exchanger and a high temperature at the pertaining outlet end thereof; a tube bottom arranged at said heat exchanger inlet end, said tube bottom being of predetermined thickness; and a device including a supportgrating arranged in the vicinity of said tube bottom, operatively connectible to said shell, and extending at least nearly perpendicular to said tube bottom in said region through which said cooler substance is conveyed, said heat exchanger comprising: a tube top arranged at said heat exchanger outlet end, said tube top having an effective thickness which is greater than the pertaining predetermined thickness of said tube bottom; an effective quantity of cooling channels arranged in said tube top and extending parallel to one another between pertaining tubes of said tube bundle; recess means for communicating said cooler substance with said cooling channels; and conduit means adapted to communicate said channels with said riser conduit means.