Patent ID: 6524098
Filing Date: 2003-02-25
Classification: F23C,F23D

Abstract:
An air swirler structure for an elongated industrial burner adapted for burning either liquid or gaseous fuels, said burner having a central axis and being configured and arranged to provide concentric primary and secondary air flows moving in a direction generally parallel to said axis, said primary air flow being surrounded by said secondary air flow, said swirler structure comprising:a first swirler component located in said primary air flow for swirling the primary air flow, said first swirler component having an outer edge that extends around said axis in radially spaced relationship thereto; and a second generally annular swirler component located in said secondary air flow for swirling said secondary air flow independently of the swirling of the primary air flow, said second swirler component having an internal edge that extends around said axis in spaced relationship thereto, said internal edge of the second swirler component being greater in diameter than said outer edge of the first swirler component, the arrangement being such that the swirled secondary air flow is in direct contact with the swirled primary air flow as said air flows exit their respective swirler components.