METHOD OF REDUCTION OF NITROGEN OXIDE EMISSION AT BURNING OF FUEL IN FUNNEL OF VAPOR GAS-RESIDUAL FUEL OIL BOILER Russian patent published in 2008 - IPC F23C9/06 

FIELD: heat power engineering.

SUBSTANCE: method can be used at reconstruction of boilers. Walls, separating wells of internal and peripheral air and re-circulating gases, are removed from boiler to reduce nitrogen oxides formed at burning of fuel and for reduction of air pressure in front of funnels behind bottom wells starting from taps feeding air and gases into funnel wells. Output of gases from bottom well to taps is closed by walls. Nozzles are mounted to introduce gases into taps. Nozzles provide distribution of gases in flowing air in such a way that at subsequent flowing of mixture to funnels, the gases and air could mix. Mixture is supplied to all channels of available burners, namely, internal and peripheral air channel and channel of re-circulating gases.

EFFECT: reduced pressure in front of burners' reduced content of nitrogen oxide in removed gases.

6 dwg