GB928355A - Oil burner apparatus - Google Patents

Abstract

928,355. Liquid fuel burners. GULF OIL (GREAT BRITAIN) Ltd. Jan. 9, 1961 [Nov. 18, 1960], No. 791/61. Class 75 (1). A burner apparatus comprises an aspirating type nozzle 10 discharging into the lower end of a tube 70, means for supplying air around the nozzle and a barrier 80 at the remote end of the tube. The barrier 80 may be an inverted, cylindrical cup of the same diameter as the tube 70 and supported above the tube by brackets 82 or it may be an inverted cylindrical cup of greater diameter than the tube 70 but having an inturned lip and a plurality of perforations or it may be a disc in which case the upper end of the tube 70 is provided with apertures or it may be a frusto-conical cup with perforations in its side wall. Air is supplied around the nozzle by perforations 78 from a chamber 74 abutting the bottom of the tube 70 and supplied with pressure air by a conduit 76 or with ambient air. A transverse shield with a central aperture for the flames is disposed in the tube 70 and the nozzle is surrounded by a perforated tube disposed so that a portion of the air through the perforations 78 rises along the outside of the perforated tube. The aspirating nozzle 10, Fig. 1, comprises a plug 26 secured into a tube 12 and having a frusto-conical stem 34 engaging in a conical bore 60 in an orifice plate 18. Air is delivered by a tube 54 to the chamber 38 defined by the plug and the tube 12. Part of the air passes through tangential grooves 36 in the stem 34 to a swirl chamber 40 defined by the forward part of the conical bore 60. The rest of the air passes through tangential bores 24 in a rim 22 of the orifice plate 18 and is discharged through an orifice 16 in the end plate 14 of the tube 12. The swirling air in chamber 40 draws fuel oil through a passage 28 from a reservoir on a lower level, and the mixture is sucked by the swirling air discharging through the orifice 16.