All kinds of swirl burners are composed of circular nozzles and equipped with different types of rotary jet generators.When there is a mixture of air powder (primary air) or hot air passing through, it will rotate under the action of a swirling burner and generate a rotating jet, forming a flue gas return zone near the nozzle which is conducive to the early mixing of air powder.The cyclone burner divides the secondary air into the internal secondary air and the external secondary air, which is intended to reduce the excess air volume in the center of the burner, so as to realize the under-oxygen combustion in the central area of the burner and achieve the goal of reducing NOz
