COMBUSTION SYSTEM USING A BURNER GENERATING AN ULTRA LOW NOx EMISSIONS

摘要

The present invention reduce the amount of generation of nitrogen oxides (NOx) in the burner using a fuel composed of the normal gas relates to ultra-low NOx combustor and the combustion system for using the same, ; and having a multi-stage burner with the fuel feed pipe of the air inlet and outlet, and an air source for supplying air to the air inlet of the burner, the eowa blow air from the air source to send to the multi-stage air inlet; And fuel supply that can supply fuel to the fuel feed pipe, connected to the outlet side of the burner fuel and air to the exhaust of the fuel and air mixing with the furnace to burn the gas, the combustion gas in the combustion is connected to a In the combustion system comprising an exhaust duct, the burners are installed, a plurality of holes formed on one side of the inlet opening and the opposite wall with a closed distal end and around the fuel supply pipe, the fuel feed pipe, each having its opposite ends first stage air inlet and outlet, respectively, and the supply of air to form the first-stage burner protrudes more than the front end of the fuel supply pipe to be formed of the outer cylinder, the first-stage burner is installed around the outer tube to form each of the two-stage air inlet and outlet in its end portions supplying air to the first-stage and two-stage burner formed of the burner outer cylinder more than the front end of the outer tube to be projected, and comprises an orbiting provided between the front end and the front end of the fuel feed pipe of the first-stage burner outer cylinder, a plurality of holes in the fuel feed pipe is is formed on the lower than turning group is characterized in that to form a rapid mixing zone to rapidly mix the fuel and air in front of the turning operation of the turning-based group. ; NOx generation reduction technique applied in the present invention is a combustion method for inhibiting the generation of NOx reduction techniques to prompt about 20ppm degree of uncontrollable existing low emission of NOx burner, the burner design turning by applying a rapid mixing (Rapid mixing) using a group, in the burner exit end to ensure that the fuel and air mixture is completely eliminate the possibility of prompt NOx by removing the fuel-rich region of the inner burner, creating a uniform mixture state in the firing zone to suppress the temperature rise of the local flame inhibit thermal NOx, and also has the effect that can be more easily achieved a reduction of NOx by applying a method for controlling the temperature of the flame to recirculate the exhaust gas at the same time.