WATER HEATING BOILER WITH RECTANGULAR CROSS-SECTION Russian patent published in 2015 - IPC F24H1/00 

FIELD: heating.

SUBSTANCE: boiler contains a foundation, on it a furnace and a convection unit are installed, wherein the furnace space correspondingly from bottom, front, sides and top is limited by the inclined shearing grate, by front, side and top furnace waterwalls, made in form of tube sheets hydraulically connected with the appropriate two top and two bottom longitudinal boiler headers. The furnace is adjacent to the convection unit comprising convection gas channels, equipped with heat exchanging surfaces, comprising transverse streaming pipe bunches of tandem arrangement, the hydraulically connected with the longitudinal boiler headers. In the furnace volume of the boiler a composite red-hot dome made out of chamotte bricks, that by their chamfered edges rest against the horizontal sections of L-shape downcomers, their one ends are connected with the transverse brace of the ceiling screen, and another ends are connected with bottom transverse headers of the front screen. One of the side furnace screens near the red-hot dome has through manhole with door.

EFFECT: invention intensifies the thermal action on the combusted coal due to formed heat accumulating surfaces.

2 dwg