HEAT EXCHANGER FOR COOLING REACTION GAS, INCLUDING A TUBULAR CONNECTION BETWEEN A COOLED TUBE AND AN UNCOOLED TUBE

摘要

Heat changer apparatus for cooling reaction gas includes a tubular connection between an uncooled tube and a cooled tube that comprises a cooled inner tube (3) surrounded by a tubular jacket (4). A bifurcate in cross-section inlet head of the uncooled tube has an outer tubular section (13) connected to the tubular jacket (4) and an inner tubular section (12) slightly axially spaced from the inner tube (3). An intermediate space between the outer and inner tubular sections is filled with heat-insulating material. A preferably U-section soling ring is disposed in a recess (18) which is formed radially outwardly of an edge region (17) of the inner tubular section (12). The edge region extends from the inner diameter and has an and face which is slightly axially spaced from the inner tube (3) by a spacing equal to or less than the maximum thermal expansion of the inlet head (11).