DUAL FUEL BURNER

摘要

Airstream type burner capable of burning either gas or oil fuel or both, and having very high turn down ratio and good low rate burning characteristics on either fuel. Burner is used either in a make-up air duct or as a combustion head in a heat exchange unit. Burner has conical burner cone having a plurality of circumferential rows of air apertures along its length for receiving combustion air from the moving environmental airstream; an ultrasonic type oil fuel nozzle mounted centrally of a flame retention head at the narrow, or head end of the burner cone; an exterior, annular-shaped gas manifold which feeds raw gas through a circumferential row of gas ports adjacent to the head end of the cone and against the exterior of a cylindrical gas inlet baffle ring attached within, and aligned with the axis of the burner cone; a coneshaped diffuser mounted centrally of the forward or downstream end of the burner cone; a cylindrical air curtain baffle ring attached within the downstream end of the burner cone in concentrically surrounding spaced relation with the diffuser for establishing a cylindrical air curtain emanating from the last circumferential row of air apertures in the burner cone and projecting downstream from the forward end of the cone; and a cylindrical housing concentrically surrounding the burner cone and attached thereto by an annular flange at the exterior of the downstream end of the latter.