Kiln waste gas desulfurization, denitrification, dust removal and waste heat recovery system and method thereof

The invention relates to a kiln waste gas desulfurization, denitrification, dust removal and waste heat recovery system and method, and belongs to the technical field of glass bottle production, the kiln waste gas desulfurization, denitrification, dust removal and waste heat recovery system comprises an input flue and a conveying flue, a first reaction flue is arranged between the input flue and the conveying flue, and the first reaction flue communicates with the conveying flue; a second reaction flue is arranged in the side, close to the input flue, of the first reaction flue, the second reaction flue is communicated with the input flue, a third reaction flue is arranged in the first reaction flue, and the third reaction flue is located between the first reaction flue and the second reaction flue; the third reaction flue covers the side, close to the conveying flue, of the second reaction flue, and the end, close to the conveying flue, of the third reaction flue is in a closed state. The flue gas desulfuriz