WATER-TUBE BOILER Russian patent published in 1996 - IPC

FIELD: heat engineering. SUBSTANCE: water-tube boiler has furnace 11 and vertical smoke stack 12 located on its one side. Mounted in smoke stack 12 is unit of convection tubes 31 for regeneration of heat of flue gases flowing through smoke stack 12. Convection tube unit is formed by several parallel rows of vertical convection tubes provided with members 32 located on their outside to increase their surface. Tubes 31 are interconnected in each row forming flat section by means of horizontal manifold 33 which is connected with convection tubes in this row and by means of lower horizontal pipe line 34. Manifolds 33 of different sections are connected separately to steam dome 19 of boiler 10 and their distributing pipe lines 34 are connected separately to intake box 16 of boiler 10. EFFECT: facilitated repair jobs and reduction of time required for performing repairs. 10 cl, 8 dwg