Importance

Loading Importance Indicators...

Abstract

The invention relates to a burner for forming a flame in a furnace by means of gaseous fuel and combustion air (I), simultaneously recirculating flue gases in the furnace, wherein the burner comprises

a burner frame and a combustion head connected to the same by its cylindrical body, wherein the end portion of the combustion head facing the furnace extends at its first end to the furnace, and the second end of the end portion is connected to said cylindrical body,a primary gas pipe for supplying gaseous fuel (G; G1) to the furnace, wherein the primary gas pipe extends inside the combustion head in its longitudinal direction, particularly inside of the end portion of the combustion head, and the orifice of the primary gas pipe opens into or close to the furnace, and a primary air supply pipe also extends inside the combustion head and surrounds said primary gas pipe, and the orifice of the supply pipe opens into the furnace or to the orifice of the end portion of the combustion head,a flow duct for main combustion air (Imain) extending inside the combustion head and surrounding said primary air supply pipe at least inside of the end portion, anda set of main gas rods, comprising a set of elongated primary gas rods extending in the longitudinal direction of the combustion head, for supplying the furnace with fuel, wherein the main gas rods are arranged at least partly outside the cylindrical body of the combustion head, extending close to the joint between the cylindrical body and the end portion so that they are surround said body at regular intervals around the circumference of the body,and wherein in connection with the main gas rods, at the end portion of the combustion head, several ejector ducts are provided for recirculating flue gas from the furnace into the gaseous fuel (G; G2) coming from the main gas rods, and for conveying the produced flue gas-flue mixture (S+G2) further to the furnace.

Loading the Abstract Image...

First Claim