FURNACE Russian patent published in 2007 - IPC F23C5/08 

FIELD: power engineering, possible use at heating plants for kindling boilers.

SUBSTANCE: in accordance to the invention, the furnace contains central and peripheral combustion chambers, divided by a screen and connected by drain window, burner device, output section of which is inserted into peripheral combustion chamber and enclosed in circulation pipe, in front of input end of which nozzles for feeding injecting agent and air are positioned, and on output end a burner orifice is mounted, where circulation pipe is positioned inside the burner orifice with a circular gap between them, and dust supplies, connected to burner device by main and bypass dust conduits having chokes, where bypass dust conduit is connected to circulation pipe which is inserted into main dust conduit, which is in turn connected to burner orifice, where burner orifice and circulation pipe are made in form of convergent tubes, and bypass dust conduit is connected to a supply of fine dust. Burner device 5 is mounted on hollow horizontal cylinder 18 perpendicularly to axis of cylinder, capable of axial rotation, floor 19 of peripheral chamber 2 is provided with an additional heating supply 20 by means of electric current or a volatile flammable fuel burner, and burner orifice 9 is inserted into air nozzle 22 which is made in form of convergent tube passing through both walls of aforementioned cylinder 18 and connected to air duct 23.

EFFECT: ensured reliable and failure-free kindling due to heating of peripheral combustion chamber.

1 dwg