Patent ID: 8062605

Claim:
A cooling system for use in a shell-type reactor for catalytic exothermic reactions, comprising: at least two vertically extending double tubes which each include an outer tube and an inner tube, wherein the outer tube is closed at its lower end, at least one distributor for supplying a fluid cooling medium into the upper end of the inner tubes, and a horizontally extending plate, which on its upper surface includes at least two upwardly open grooves extending parallel to each other, wherein two adjacent grooves each are separated from each other by a common inner wall, at least one outer tube, having an upper end, is disposed in each groove, through the plate, each outer tube is tightly welded to the plate on the groove base, the upper, open side of each groove is closed with a lid, so that each groove forms a collector for discharging the cooling medium from the outer tubes, and each inner tube opens through the lid into a distributor and is tightly attached to the lid.