EP0268432B1 - An atomizing nozzle assembly - Google Patents

An atomizing nozzle assembly Download PDF

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Publication number
EP0268432B1
EP0268432B1 EP87310020A EP87310020A EP0268432B1 EP 0268432 B1 EP0268432 B1 EP 0268432B1 EP 87310020 A EP87310020 A EP 87310020A EP 87310020 A EP87310020 A EP 87310020A EP 0268432 B1 EP0268432 B1 EP 0268432B1
Authority
EP
European Patent Office
Prior art keywords
cylindrical sleeve
deflector core
deflector
mixing zone
atomizing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP87310020A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0268432A2 (en
EP0268432A3 (en
Inventor
Adam J. Bennett
Charles E. Capes
John D. Hazlett
Kevin A. Jonasson
William L. Thayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Council of Canada
Original Assignee
National Research Council of Canada
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Research Council of Canada filed Critical National Research Council of Canada
Publication of EP0268432A2 publication Critical patent/EP0268432A2/en
Publication of EP0268432A3 publication Critical patent/EP0268432A3/en
Application granted granted Critical
Publication of EP0268432B1 publication Critical patent/EP0268432B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F23D1/005—Burners for combustion of pulverulent fuel burning a mixture of pulverulent fuel delivered as a slurry, i.e. comprising a carrying liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/46—Homogenising or emulsifying nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2211/00—Thermal dilatation prevention or compensation

Definitions

  • This invention relates to an atomizing nozzle assembly.
  • the core is mounted in a flared socket of a deflector core holder and inner and outer sleeves feed, say, atomizing air to the deflector core surface and, say, a coal liquid mixture fuel inwardly around the nozzle rim so that the fuel is held by the air as a film against the nozzle rim inner surface and then atomized as it emerges from the nozzle rim.
  • an atomizing nozzle assembly comprising:
  • the adjustment means is capable of adjusting the width of the mixing zone to an L to W range ratio which is within the range of about. 5:1 to about 10:1, preferably 7:1 to 8:1, where L is the length of the mixing zone in the direction of flow therethrough and W is the width of the mixing zone.
  • the face forming the chamfered extremity of the deflector core, and a downstream side face of the nozzle rim are symmetrically inclined, at any circumferential position, with respect to a centerline extending along the mixing zone at that circumferential position, at an included angle ( ⁇ °) in the ratio with respect to the angle ( ⁇ °), at which the atomizing fluid is directed towards the outwardly diverging surface of the deflector core of about 130° : 50° to about 100° : 80°.
  • the adjustment means may comprise a shaft for rotating the deflector core and extending rearwardly therefrom along the inner cylindrical sleeve, a gland slidably mounting a rear end portion of the shaft, which extends therethrough, in the inner cylindrical sleeve, means for rotating the rear end of the shaft.
  • a heat exchange may be provided around the outer cylindrical sleeve and mounted therearound at a front end by the said mounting means, and a differential thermal expansion accommodating gland slidably mounting a rear end portion of the heat exchange casing on the outer cylindrical sleeve.
  • an atomizing nozzle assembly comprising:
  • the deflector core 1 has a bore 76 in which a spigot 78 of the cap 32 is located, and the head of the bolt 34 is countersunk in the cap 32 to be flush therewith.
  • the nozzle rim 8 is located in a retaining ring 80 which is welded in a locating sleeve 82.
  • the locating sleeve 82 whose inner surface 84 forms a part of the boundary of the liquid passage 56, is secured in the stepped, annular recessed portion 52 by the threaded collar 58.
  • the deflector core holder 20 has a recess 86 in which the shaft 64 is secured by means of a pin 88.
  • the collar 50 of the inner sleeve 36 is located in a recess 90 in the outer sleeve 48 and has annular rings 92 and 94 locating the tubes 68 and 72 respectively which are welded in position.
  • the outer sleeve 48 has a step 96 locating an outer, cylindrical casing 98 which is welded to the outer sleeve 48.
  • the casing 98 supports and seals the upstream rear end portion of the tube 72 in a relatively slidable manner by means of a packing gland 100, and forms a heat exchange casing with a heat exchange fluid inlet 102 and outlet 104.
  • the heat exchange fluid may be coolant water, for cooling the nozzle assembly, or steam for heating the liquid-to-be-atomized (e.g. a coal slurry fuel) for lowering its viscosity, and the packing gland 100 accommodates differential thermal expansion between the tube 72 and the casing 98.
  • the tube 72 is sealed around a rear end portion of the tube 68 in a relatively slidable manner by the differential thermal expansion accommodating gland 106, which is a packing gland, and has an inlet 108 for liquid-to-be-atomized.
  • the differential thermal expansion accommodating gland 106 which is a packing gland, and has an inlet 108 for liquid-to-be-atomized.
  • the tube 68 is sealed in a slidable manner around a rear end portion of the shaft 64 by a gland 110 and has an atomizing fluid inlet 112.
  • FIG. 1 and 2 The apparatus shown in Figures 1 and 2 was primarily designed for use in tests as a liquid mixture fuel atomizer and will be described, in operation, atomizing a de-ashed, pulverized coal liquid mixture fuel using the atomizing air of a conventional oil burner assembly (not shown) where secondary, combustion air is swirled around the atomized fuel.
  • atomizing air is fed along the bore of the tube 64, through the ports, such as port 70, to the fluid passage 46 from which it is directed as a jet in an unobstructed manner through the mixing zone 16 along the surface 6 of the deflector core 1.
  • the pulverized coal liquid mixture fuel is fed along the bore of the tube 72 through the ports, such as port 74, to the liquid passage 56 from which it is directed along the mixing zone 16.
  • the jet of air from the fluid passage 46, flowing along the surface 6 of the deflector core 1 causes the pulverized coal liquid mixture to initially be held as a hollow cone-shaped film against the flared inner surface 14 of the nozzle rim 8 so that there is negligible contact between the fuel and the deflector core.
  • the cone-shaped film of fuel travels along the mixing zone 16 it is thoroughly mixed with the air and emerges from the mixing zone 16 as an atomized jet.
  • the width W ( Figure 2) of the mixing zone 16 can be adjusted while the nozzle assembly is in use by means of the barrel 66 and the screw threaded engagement between the deflector core holder 20 and the inner cylindrical sleeve 36.
  • the nozzle rim 8 had a minimum inside diameter of 2.25 inches (57.15 mm) and a maximum inside diameter in the downstream direction of 2.539 inches (64.49 mm).
  • the deflector core 1 had a maximum diameter of 2.460 inches (62.48 mm) at the outlet of the mixing zone 16.
  • the mixing zone 16 had a nominal width (W) of .035 inches and the length/width (L/W, Figure 2) ratio was varied between 7 and 12.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Nozzles (AREA)
  • Spray-Type Burners (AREA)
EP87310020A 1986-11-13 1987-11-12 An atomizing nozzle assembly Expired EP0268432B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA522934 1986-11-13
CA000522934A CA1277585C (en) 1986-11-13 1986-11-13 Atomizing nozzle assembly

Publications (3)

Publication Number Publication Date
EP0268432A2 EP0268432A2 (en) 1988-05-25
EP0268432A3 EP0268432A3 (en) 1990-01-31
EP0268432B1 true EP0268432B1 (en) 1992-08-05

Family

ID=4134342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87310020A Expired EP0268432B1 (en) 1986-11-13 1987-11-12 An atomizing nozzle assembly

Country Status (4)

Country Link
EP (1) EP0268432B1 (enrdf_load_stackoverflow)
JP (1) JPS6488019A (enrdf_load_stackoverflow)
CA (1) CA1277585C (enrdf_load_stackoverflow)
DE (1) DE3780916T2 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201218499Y (zh) * 2007-08-06 2009-04-08 国际壳牌研究有限公司 燃烧器
CN101363626B (zh) 2007-08-06 2015-05-20 国际壳牌研究有限公司 制造燃烧器前脸的方法
CN101363624B (zh) 2007-08-06 2011-05-25 国际壳牌研究有限公司 燃烧器
US8070483B2 (en) 2007-11-28 2011-12-06 Shell Oil Company Burner with atomizer
JP5525989B2 (ja) * 2010-10-05 2014-06-18 ダイニチ工業株式会社 気化装置
CN113522550B (zh) * 2021-08-12 2024-05-31 南京市蓝业科技有限公司 一种水煤浆生产用雾化喷头

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0128805A3 (en) * 1983-06-03 1986-02-19 Forney Engineering Company Twin fluid atomizer
CA1209182A (en) * 1984-01-04 1986-08-05 Charles E. Capes Wear resistant atomizing nozzle assembly
DD249612A3 (de) * 1985-05-14 1987-09-16 Stroemungsmasch Veb Fluessigkeitsbrenner mit dampfdruckzerstaeubung

Also Published As

Publication number Publication date
DE3780916D1 (de) 1992-09-10
EP0268432A2 (en) 1988-05-25
JPH0325690B2 (enrdf_load_stackoverflow) 1991-04-08
JPS6488019A (en) 1989-04-03
CA1277585C (en) 1990-12-11
DE3780916T2 (de) 1993-03-25
EP0268432A3 (en) 1990-01-31

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