TUBULAR HEAT EXCHANGER Russian patent published in 1997 - IPC

FIELD: heat exchangers used for high-temperature and aggressive media. SUBSTANCE: heat exchanger includes cylindrical shell with end inlet and outlet headers for medium to be heated and side inlet and outlet branch pipes for heat-transfer agent, bundle of longitudinal tubes located inside shell and connected with headers. Longitudinal tubes consists of two and more sections coupled together. Terminal connecting members of these sections have prismatic or cylindrical form; in connecting the tubes in bundle, terminal connecting members are blocked with terminal members of adjacent tubes forming members which excludes lateral and axial displacement. Prismatic terminal members form tube sheets and partitions partially overlapping the cross section; cylindrical terminal members form passage sections. Tubes are provided with fins in form of circular projections; prismatic and cylindrical terminal members are made integral with ends of tube section forming seats to receive narrowed opposite ends of sections being connected; outer diameter of cylindrical members is equal to outer diameter of tubes without fins; diameter of prismatic members is equal to diameter of circle inscribed in them which is equal to diameter of tubes with fins. EFFECT: enhanced efficiency. 4 cl, 9 dwg