Ceramic burner for use in an air heater

In a ceramic burner for use in an air heater of the type including an axially extending combustion chamber, said burner including a mouth portion adapted to open into the combustion chamber of the air heater, a fuel gas supply conduit having a gas delivery region opening into said mouth portion and a mixing and aspiration region communicating with said gas delivery region and adapted to extend in a direction inclined with respect to the axis of the combustion chamber of the air heater, and an air supply conduit having nozzles opening into said mixing and aspiration region of said fuel gas supply conduit, the improvement wherein:

• said mixing and aspiration region of said fuel gas supply conduit has an angular configuration including a first segment inclined with respect to the axis of the combustion chamber in a direction toward said nozzles of said air supply conduit and a second segment inclined with respect to said first segment and in communication therewith at a position of directional change;
• said gas delivery region of said fuel gas supply conduit is in communication with said second segment of said mixing and aspiration region and is adapted to extend coaxially with respect to the combustion chamber of the air heater;
• said nozzles of said air supply conduit comprise a first set of nozzles and a second set of nozzles, said first set of nozzles being directed toward an opposite wall of said first segment of said mixing and aspiration region adjacent said position of directional change, and said second set of nozzles being directed toward said mouth portion;
• and
• said gas delivery region having extending thereinto, at positions adjacent said mouth portion, a plurality of projections.