LOW-HEAD STRAIGHT-FLOW SWIRL BURNER Russian patent published in 2011 - IPC F23C99/00 F23D11/00 F23N5/00 

FIELD: power industry.

SUBSTANCE: low-head straight-flow swirl burner includes air inlet chamber (1), vane swirlers with rotary vanes (6) on axes (9), which form vortex chambers (8) at Venturi nozzle (7) inlet, and are kinematically connected with control pins (5) and end disks (4) to fuel supply pipeline (10) on the inlet part of which there arranged is cylindrical plunger of slot-type fuel supply control (12), and on the outlet part of fuel supply hole to constricted Venturi nozzle (7) section. Swivel arms (11) with tension springs (16) kinematically connect wedge-shaped projections (13) arranged on axial stock (14) kinematically connected to lever (17), with steam pressure control (18) equipped with membrane (19), stock (20) and power spring (21). Load is controlled in operation as to boiler steam pressure acting by means of steam pressure control (18) on axial stock (14) with wedge-shaped projections (13) turning the levers (11). At that, fuel flow through control (12) and flow swirling degree in swirl chambers (8) with the appropriate air flow through Venturi nozzles (7) changes. Fuel-air mixture is supplied to combustion stabiliser (24) where recirculation of combustion products is performed in zone of backflows between Venturi nozzles and external wall (25).

EFFECT: improving operating economy of the boiler within the whole range of loads, and providing ease of use.

3 dwg