Clean burning burner, particularly for combustion of gasified liquid fuel, such as fuel oil, or of gas

Clean burning burner for gasifying and combusting liquid fuel, said burner having

• a burner body (15);
• fuel supply means (11, 13;
• 77, 79) providing atomized fuel under pressure;
• an air blower (9) providing a blown air stream;
• means for defining a gasification space (66) for effectively complete gasification of the atomized fuel and said blown air supplied by said fuel supply means and said air blower, respectively;
• a gasification space air inlet means (35) formed with a gasification space air inlet opening (55), coupled to the burner body;
• a stream deflection element (31) located spaced from the means defining a gasification space and positioned to provide for mixing of the atomized fuel with the blown air,
• said stream deflection element having a remote end (58, 60a), remote from said gasification space air inlet opening (55);
• a flame tube (21) outside of, and surrounding the gasification space (66) extending longitudinally from a region in the vicinity of the gasification space air inlet opening (55) approximately up to the remote end (58, 60a) of the stream deflection element (31);
• said stream deflection element (31) being, at least in part hollow cup-shaped perforated member, and a perforated plate extending over and spaced from said cup-shaped member to form a recirculation zone therebetween, and being shaped, configured and said stream deflecting element being positioned with respect to the flame tube (21) to form an essentially ring-shaped outlet space (40) between the deflection element (31) and the flame tube (21) where the root or base of the flame of the burner will form upon mixing and combustion of the gasified fuel-air mixture in said gasification space, said flame extending in essentially radial direction to the end of the flame tube;
• means forming a first recirculation path (I) for recirculation of hot combustion gases back into said gasification space (66) formed by said stream deflection element (31), in combustion with said flame tube (21), and located between said means forming said gasification space and said flame tube,
• said stream deflection element (31) deflecting hot combustion gases into said first recirculation path;
• and
• wherein the stream deflection element (31) and perforated plate are formed with a plurality of openings (57, 61, 59;
• 57'), which openings are positioned for conducting hot combustion gases from said recirculation zone through said stream deflection element and plate and into said first recirculation path (66) in a second recirculation path (II), while heating said stream deflection element.