LOOP-TYPE PLATEN HEATING SURFACE Russian patent published in 2004 - IPC

FIELD: power engineering+ADs- boiler designing and redesigning. SUBSTANCE: steam generator loop-type platen heating surface has tube loops joined with inlet and outlet microchambers installed nearby+ADs- platen surface is disposed in vicinity turn of stack gas flow+ADs- tubes form L-shaped platen with sections meeting gas flow at turn inlet and at its outlet at angle of 90 deg. In addition suspended tubes are tubes of L-shaped platen proper+ADs- carrying section of each suspended tube is joined with tube sections in plane of platen proper. End portions of L-shaped platen tubes are joined with carrying sections of suspended tubes and their total length in heated zone is minimal compared with tube lengths included in loop of this L-shaped platen which ensures desired temperature conditions for these sections, Used as spacing members for tubes of L-shaped platen horizontal section are members tightly enclosing these tubes which are welded together and spaced maximum 20 mm from suspended carrying tubes. EFFECT: enhanced efficiency and reliability of platen heating surface disposed in vicinity of stack gas turn. 4 cl, 5 dwg