TUBE HEAT EXCHANGE ASSEMBLY AND APPARATUS, IN PARTICULAR A REACTOR FOR THE PRODUCTION OF MELAMINE, COMPRISING SUCH A HEAT EXCHANGE ASSEMBLY.

摘要

The present invention refers to a tube heat exchange assembly comprising a tube plate (101) that has a first face which, in use conditions, is facing inside a heat exchange chamber (140), and a second face opposite to said first face and which, in use conditions, is facing outside said heat exchange chamber (140), at least one through hole (103) which passes through the thickness of said tube plate (101) and at least one heat exchange tube (100) which passes through said through hole (103) and is operatively associated with a supply circuit of a heat exchange fluid, wherein said tube heat exchange assembly further comprises at least one sleeve (200) opened at the opposite ends and fixed to said tube plate (101) and to said tube (100), said sleeve (200) being housed in said hole (103) and fitted on said tube (100) at a section of the latter wherein it crosses the thickness of the tube plate (101), wherein furthermore said sleeve (200) protrudes beyond said first face of the tube plate (101), so that a first open end of the same ends inside said heat exchange chamber (140); a further object of the invention is an apparatus comprising such a heat exchange assembly.