Importance

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Abstract

A heat exchanger having a plurality of spaced apart tubes loosely penetrating aligned oversized holes in two spaced apart tube sheets; a shell around the tube sheets; each tube sheet being secured against inward displacement axial to the tubes by contact with stop means on the shell; each tube sheet being barred against outward displacement axial to the tubes by keys mechanically engaging the tube sheet and shell so that upon release of the keys they no longer bar removal of the tube sheet from the shell; a solid binder joining and sealing the tubes to the tube sheet and joining and sealing the tube sheet to the shell, with said solid binder having substantial compressive, tensile and shear strength, and being convertible by heat at a sufficiently high temperature to a physical state in which it has much lower compressive, tensile and shear strength; a conduit to deliver a heat exchange fluid around the tubes inside of the shell between the tube sheets; and a conduit to deliver a liquid feed stream into a feed box partially defined by one of the tube sheets.

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First Claim