Graphite heat exchange assembly with silicon carbide tube inserts and fluoropolymer coating

摘要

A graphite heat exchange assembly for efficient heat transfer between a process fluid and a service fluid. The heat exchange assembly includes a thermally conductive graphite body (112) having an external surface and a plurality of bores (172) receiving the process fluid. A plurality of passageways (174) receive the service fluid. The bores and the passageways facilitate efficient heat transfer between the process fluid and the service fluid. A multiplicity of silicon carbide tubes (180), having exposed ends and an internal diameter, are disposed in the bores, the passageways, or both. A fluoropolymer coating (190) is applied to the external surface of the graphite body and to the ends of the silicon carbide tubes. The internal diameter of the silicon carbide tubes is maintained free of the coating.