METHOD FOR FUEL COMBUSTION IN INDUSTRIAL FURNACE Russian patent published in 1999 - IPC

FIELD: procedure of combustion of natural gas or its mixtures with other gases (air-gas mixture) in industrial furnaces used for roasting of products in refractory, construction and metallurgical industries. SUBSTANCE: method for combustion of natural gas provides for gas saving due to flameless burning and reduction of CO level in flue gases. Fuel is mixed with air in the first chamber with excess concentration, and in the second chamber hot air is mixed into the obtained air-gas mixture in the ratio of air-gas mixture flow rate to hot air flow rate within 0.45 to 0.9 in quantity determining the final concentration of fuel, the ratio of fuel concentration in the first chamber to fuel concentration in the second chamber makes up 2 to 2.6. Flameless gas burning at oxidizing atmosphere in the furnace occurs due to complete mixing of gas with air. EFFECT: saved fuel and produced oxidizing atmosphere in furnace decreasing exaction of CO into the atmosphere. 2 cl