F - Mech Eng,Light,Heat,Weapons – 23 – L
Patent
F - Mech Eng,Light,Heat,Weapons
23
L
F23L 7/00 (2006.01) F27D 19/00 (2006.01)
Patent
CA 2693732
Method for homogenizing the heat distribution as well as decreasing the amount of NO x in the combustion products when operating an industrial furnace (1) with at least one conventional burner (2a, 2b, 2c, 2d) using air as oxidant. An additional oxidant comprising at least 50% oxygen gas is caused to stream into the furnace (1) through a lance (3a, 3b, 3c, 3d). The total amount of oxygen supplied is balanced against the amount of fuel being supplied through the air burner (2a, 2b, 2c, 2d). The invention is characterised in firstly, the combination of that at least 40% of the supplied oxygen is supplied through the additional oxidant, that the lance (3a, 3b, 3c, 3d) is arranged at a distance from the air burner (2a, 2b, 2c, 2d) of at least 0.3 meters, and that the additional oxidant streams into the furnace (1) through the lance (3a, 3b, 3c, 3d) with at least sonic velocity, and secondly that the additional oxidant is supplied only when the air burner (2a, 2b, 2c, 2d) is operated at a certain lowest power or at a higher power.
Ekman Tomas
Gartz Mats
Lugnet Anders
Ritzen Ola
Aga Ab
Fetherstonhaugh & Co.
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