METHOD AND APPARATUS FOR INJECTING PULVERIZED COAL INTO A MULTI-TYPE ROTARY KILN

摘要

The invention relates to a method and apparatus for the fine coal blown to the inside of the rotary firing furnace provided in multiple stages.; Step of the present invention, separate the rotary firing furnace in the primary and secondary calcination furnace firing furnace; Primary baking furnace is equipped with a burner that uses pulverized coal and COG as a mixed fuel gas, and has a secondary calcination furnace mounting a burner, which uses only COG as fuel gas; The pre-heater and the first calcination furnace is 80 to 85% of the pulverized coal and the step of input preheated limestone a COG gas as compared to the total use amount of fuel; and, the secondary sintering furnace and the cooler has a COG gas of 15% to 20% as compared to the total use amount of fuel provides a multi-stage rotary firing furnace pulverized coal injection method and apparatus for containing; in the step of firing the limestone to calcium oxide. According to the present invention, the mixture of pulverized coal and COG gas, but is used as fuel in a rotary sintering furnace, in the separation of the primary firing furnace and the secondary sintering furnace the first firing furnace and forms mainly the warm-up of limestone in a mixed use of pulverized coal and COG gas, 2 primary baking furnace in an improved effect is obtained so as to significantly improve a product quality by combustion of unburned pulverized coal by using only COG gas, as well, so is made soseongreul of limestone to calcium oxide production product.