(19)
(11) EP 0 268 432 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.01.1990 Bulletin 1990/05

(43) Date of publication A2:
25.05.1988 Bulletin 1988/21

(21) Application number: 87310020.0

(22) Date of filing: 12.11.1987
(51) International Patent Classification (IPC)4B05B 7/04
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 13.11.1986 CA 522934

(71) Applicant: NATIONAL RESEARCH COUNCIL OF CANADA
Ottawa Ontario K1A OR6 (CA)

(72) Inventors:
  • Bennett, Adam J.
    Ottawa Ontario K1Z 5S1 (CA)
  • Capes, Charles E.
    Ottawa Ontario K1H 5R9 (CA)
  • Hazlett, John D.
    Orleans Ontario K1E 2Y3 (CA)
  • Jonasson, Kevin A.
    Orleans Ontario K1E 2Y2 (CA)
  • Thayer, William L.
    Ottawa Ontario K1G 1E8 (CA)

(74) Representative: Hill, Cecilia Ann et al
Abel & Imray Northumberland House 303-306 High Holborn
London, WC1V 7LH
London, WC1V 7LH (GB)


(56) References cited: : 
   
       


    (54) An atomizing nozzle assembly


    (57) An atomizing nozzle assembly is provided having an outwardly diverging frustrum of a cone shaped, deflec­tor core (1) of wear resistant ceramic, a nozzle rim (8) of wear resistant ceramic encircling the core and coextensive with a downstream portion thereof to form a mixing zone (16) therewith for receiving liquid-to-be-­atomized therein from an unobstructed passage (56) and atomizing fluid directing the liquid-to-be-atomized away from the core. The mixing zone leads to a nozzle orifice outlet (18). The core is mounted in a core holder (20) and is adjustable by a screw thread, in close proximity to the mixing zone, to adjust the width (W) of the mixing zone, and the liquid-to-be-atomized (e.g. a coal slurry fuel) and the atomizing fluid (e.g. air) are fed along coaxial tubes (72,68) which are slidably mounted by glands (106) to accommodate differential expansions. With this combination it is possible to set the width of the gap between the deflector core and the nozzle rim even before the operating temperature is reached, because negligible changes in this width will occur due to differential expansions between the nozzle components. Furthermore, accommodating different­ial thermal expansions by the slidable glands avoids any damage occurring to the ceramic parts due to differential thermal expansion.







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