SU95460A1 - Method to increase heat transfer of a torch when using natural gas as fuel in rotating cement kilns - Google Patents

Description

When burning fuel in rotary 51 delong furnaces, besides obtaining a certain amount of heat, it is necessary that the heat transfer occurs in strictly defined linear lines and intervals, determined by the lengths of the sintering zone, calcining zone and preparation zone for the raw material. When the furnaces are operating on pulverized 1; amenio-coal fuel, heat transfer at the required intervals is provided by coke particles of fuel. When used in natural pelvic kilns, the heat output of the flame decreases sharply, which leads to an increase in fuel consumption.

This disadvantage of burning natural gas in rotary cement kilns can be eliminated if a dry carbonate feed mixture is introduced along with natural gas. This is the essence of the invention.

The dry carbonate mixture is selected to have a close chemical composition to the chemical characteristics of the sludge. The carbonate mixture decomposes in a flare, releasing COA. This g; 13. As is well known, it possesses the greatest coking particle nielding heat transfer by radiation. Therefore, the heat emission of the torch during combustion; natural gas increases, making it a quality product: fuel in rotary cement kilns is cost-effective. The dry raw material mixture in the flare of the nlamsi can be injected with screws used for feeding pulverized tonnage.

As a dry carbonate, you can use the usual raw material mixture for cement kilns, with an increased content of limestone, for example, a mixture containing CaCO; 75-80% and 5Uo + L1; Oz-le. 20%.

Subject invention

The method of increasing the flame retardancy when using natural gas as a gas supply in rotary cement kilns, is about nl, and with the fact that a dry carbonate feed mixture is introduced together with the gas.