METHOD AND DEVICE FOR IMPROVING COMBUSTION FUEL COMBUSTION IN ROTATING FURNACE, AND METHOD FOR MODERNIZING ROTARY FURNACE WITH A BURNER ASSEMBLY

摘要

1. A method for improving the combustion of auxiliary fuel (10) supplied to a rotary kiln (1) in a first stream (7), preferably in the form of particles or crushed pieces in a stream of compressed air, wherein the rotary kiln (1) has an assembly (3) burners, which includes a main burner (5) for the main fuel and a plurality of supply channels (16, 17, 18, 19, 20) for various media, moreover, one of the mentioned supply channels, called the supply channel (19) for auxiliary fuel, is made with the ability to supply the first stream of auxiliary fuel (10 ), characterized in that the tubular oxygen lance (12) for supplying an oxygen-saturated gas, preferably oxygen gas (11), or an oxygen-saturated liquid, preferably liquid oxygen (11), is provided in or adjacent to another of said supply channels, called a channel (20) for oxygen, said lance (12) having an inclined nozzle (14) located at its supply end, and an oxygen lance (12) is positioned so that oxygen-rich gas or liquid (11) exiting the nozzle (14) ), forms the second n current (8) which faces the first stream (7) .2. A method according to claim 1, characterized in that the content of one or more pollutants, in particular carbon monoxide (CO), is measured in the exhaust gases of the rotary kiln (1), and the oxygen lance (12) is turned and / or the oxygen-rich gas is supplied or liquids (11) are regulated in such a way that the content of the pollutant or the amount of pollutants in the exhaust gas is reduced to a minimum. The method according to any one of paragraphs. 1 and 2, characterized in that the second stream (8) hits the first stream (7) at a distance of less than 5 m after it exits the burner assembly (3),