EP0565814B1 - Brennerlanze zum Zerstäuben einer Kohle-Wasser-Suspension - Google Patents

Brennerlanze zum Zerstäuben einer Kohle-Wasser-Suspension Download PDF

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Publication number
EP0565814B1
EP0565814B1 EP93100768A EP93100768A EP0565814B1 EP 0565814 B1 EP0565814 B1 EP 0565814B1 EP 93100768 A EP93100768 A EP 93100768A EP 93100768 A EP93100768 A EP 93100768A EP 0565814 B1 EP0565814 B1 EP 0565814B1
Authority
EP
European Patent Office
Prior art keywords
nozzle body
outer tube
inner tube
burner lance
tube
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 - Lifetime
Application number
EP93100768A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0565814A2 (de
EP0565814A3 (en
Inventor
Günther Dehn
Horst Dr. Möllenhoff
Rüdiger Wegelin
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.)
Lurgi Lentjes Babcock Energietechnik GmbH
Original Assignee
Lurgi Lentjes Babcock Energietechnik GmbH
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 Lurgi Lentjes Babcock Energietechnik GmbH filed Critical Lurgi Lentjes Babcock Energietechnik GmbH
Publication of EP0565814A2 publication Critical patent/EP0565814A2/de
Publication of EP0565814A3 publication Critical patent/EP0565814A3/de
Application granted granted Critical
Publication of EP0565814B1 publication Critical patent/EP0565814B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/19—Nozzle materials

Definitions

  • the invention relates to a burner lance for atomizing a coal-water suspension with the aid of a gaseous atomizing medium according to the preamble of claim 1.
  • a known burner lance used to atomize oil or a liquid coal dust suspension contains a nozzle head into which the centrally guided fuel stream and the annular atomizing medium stream enter.
  • a premixing chamber is formed in the nozzle head, followed by a mixing chamber with a narrowest, quantity-determining cross section. In this way, the amount of fuel is determined in the free flow of the atomizing medium without the liquid fuel with the solid constituents contained in it coming into significant contact with the metallic walls within the quantity-determining cross section and leading to wear there.
  • the mixing chamber is followed by a post-mixing chamber provided with a plurality of outlet bores, in which the fuel and the atomizing medium are further mixed to form an emulsion.
  • a burner lance for atomizing a coal-water suspension is known from EP-A-0 182 545, in which a nozzle head is arranged in an outer tube. Bores are provided in the nozzle head through which the centrally supplied fuel flow is branched and deflected in order to convert it into an annular flow.
  • the atomization medium is also branched and brought together with the suspension from the inside and outside. Redirection and branching of liquid solid suspensions are only possible with extremely fine-grained solids.
  • EP-A-0 028 025 describes a device for atomizing a liquid fuel, in particular heating oil, which has an inner tube carrying the liquid fuel.
  • the inner tube is under an outer tube Formation of an annular gap surrounding a gaseous atomizing medium, in which a swirl body is arranged.
  • the outer tube merges into a conically narrowing atomizing chamber.
  • the fuel jet enters this atomizing space with a widening cross-section, as a result of which it fans out in a conical shape and is broken up into the finest droplets by the atomizing medium.
  • the invention has for its object to design the generic burner lance so that the atomization of a viscous coal-water suspension can be done with simpler means.
  • Such speeds in the media flows can be set in the annular gap and in the nozzle body that uniform atomization of the suspension is achieved with a simple construction of the burner lance.
  • the swirl imposed on the atomizer medium before it hits the suspension increases the atomizer quality.
  • the nozzle body is suitable for the throughput of a relatively coarse coal-water suspension with a maximum particle size of about 6 mm.
  • the cross section of the central outlet opening is designed for this maximum grain size.
  • FIG. 1 shows a longitudinal section through a burner lance
  • FIG. 2 shows, on an enlarged scale, a longitudinal section through the front end of another burner lance.
  • the burner lance consists of an inner tube 1, which is surrounded at a radial distance by an outer tube 2.
  • spacers 3 in the form of welded-on sheet metal strips or welding beads are attached to the inner tube 1, which are spiral or oblique to the longitudinal axis of the inner tube 1 run. These spacers 3 also serve as swirl bodies. Further build-up welds 4 are applied for spacing on the rear part of the inner tube 1. Between the two tubes 1, 2, an annular gap 5 extends over the entire length of the inner tube 1, the width of which is small compared to the inner diameter of the inner tube 1.
  • the inner tube 1 is connected to a fuel line, not shown, through which a viscous coal-water suspension is fed into the inner tube 1 as fuel.
  • the annular gap 5 is guided up to a feed connector 6, which is arranged in a flange 7 at the rear end of the outer tube 2.
  • a gaseous atomizing medium, preferably air, is introduced into the annular gap 5 through this feed connector 6.
  • the entire length of the outer tube 2 is surrounded by a guide tube 8, which flows directly into a combustion chamber delimited by a tube wall 19, e.g. a fluidized bed.
  • the guide tube 8 is provided at the rear end with a flange 9 which is screwed to the flange 7 of the outer tube 2.
  • the outer tube 2 is guided closely and can be pulled out of the guide tube 8 after loosening the flange connection.
  • the guide tube 8 and the flange 9 are attached to the tube wall 19.
  • the outer tube 2 extends beyond the inner tube 1 in the longitudinal extent of the burner lance and accommodates a nozzle body 10 in this part.
  • the inner cross section of the nozzle body 10 narrows starting from the inner diameter of the outer tube 2 and forms a cone with a central angle of 35 to 45, preferably 40 °.
  • the cone merges into a cylindrical, centrally arranged outlet opening 11, the inside diameter of which should preferably correspond to at least three times the maximum grain size of the fuel.
  • the nozzle body 10 is preferably exchangeably attached to the outer tube 2.
  • the nozzle body 10 is a metallic body 12 which is welded to the outer tube 2 via a weld seam 13.
  • the metallic body 12 of the nozzle body 10 is provided with an erosion-resistant layer 14.
  • the nozzle body 10 consists of a ceramic insert 15, preferably made of SiC or SiC infiltrated with Si.
  • This insert 15 of the nozzle body 10 rests with one of its end faces on an annular shoulder of the outer tube 2 and is provided with a shoulder 16 at the outlet end.
  • a projection 17 of a tube section 18 engages in this shoulder 16 and is welded to the outer tube 2 at the weld seam 13 at the end facing away from the projection 17.
  • the front end of the inner tube 1 consists of a tube piece 20, the end facing away from the nozzle body 10 is stepped and engages telescopically in the correspondingly adapted end piece of the inner tube 1.
  • the pipe section 20 thus sits loosely and without further sealing on the inner pipe 1.
  • the spacers 3 serving as swirl bodies are applied to the outer circumference of the pipe section 20.
  • the spacers 3 are connected via a weld seam 21 to a sleeve 22, which in turn is welded to the pipe section 18 and the outer pipe 2 via the weld seam 13.
  • the pipe section 20 can thus be used concentrically with the outer pipe 2, whereby displacement from the coaxial arrangement is prevented due to the possibility of axial expansion. Such a shift would lead to one-sided erosion on the nozzle body.
  • the gaseous atomizing medium flowing through the narrow annular gap 5 enters the nozzle body 10 at an increased speed as a ring stream, where it meets the central fuel stream supplied via the inner tube 1.
  • By tuning the flow rate of the Atomization medium in the annular gap 5 and the flow rate in the conical part of the nozzle body 10 achieve good atomization of the fuel suspension.
  • the atomizer medium Before striking the fuel stream emerging from the inner tube 1, the atomizer medium is forced through the spacers 3 serving as swirl bodies, which improves the atomizer quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Spray-Type Burners (AREA)
  • Disintegrating Or Milling (AREA)
  • Nozzles (AREA)
  • Gas Burners (AREA)
EP93100768A 1992-04-13 1993-01-20 Brennerlanze zum Zerstäuben einer Kohle-Wasser-Suspension Expired - Lifetime EP0565814B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4212360 1992-04-13
DE4212360A DE4212360A1 (de) 1992-04-13 1992-04-13 Brennerlanze zum Zerstäuben einer Kohle-Wasser-Suspension

Publications (3)

Publication Number Publication Date
EP0565814A2 EP0565814A2 (de) 1993-10-20
EP0565814A3 EP0565814A3 (en) 1993-11-24
EP0565814B1 true EP0565814B1 (de) 1996-03-27

Family

ID=6456723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93100768A Expired - Lifetime EP0565814B1 (de) 1992-04-13 1993-01-20 Brennerlanze zum Zerstäuben einer Kohle-Wasser-Suspension

Country Status (7)

Country Link
US (1) US5335608A (ja)
EP (1) EP0565814B1 (ja)
JP (1) JP3557437B2 (ja)
AT (1) ATE136106T1 (ja)
DE (2) DE4212360A1 (ja)
DK (1) DK0565814T3 (ja)
ES (1) ES2085659T3 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4110301A1 (de) * 1991-03-28 1992-10-01 Kurt Krieger Brennerplatte fuer strahlungsbrenner
DE19730617A1 (de) * 1997-07-17 1999-01-21 Abb Research Ltd Druckzerstäuberdüse
DE10156616B4 (de) * 2001-11-17 2006-11-02 Rwe Power Ag Verfahren zur Mitverbrennung von mechanisch entwässertem Klärschlamm in einem Wirbelschichtkessel mit stationärer oder schwach expandierter Wirbelschicht
DE10242594B4 (de) * 2002-09-13 2005-10-06 Sekundärrohstoff-Verwertungszentrum Schwarze Pumpe Gmbh Verfahren und Vorrichtung zum Einblasen von Vergasungsmittel in druckaufgeladene Vergasungsräume
AU2003233909A1 (en) * 2003-02-28 2004-09-17 Webasto Ag Nozzle for spraying liquid fuel
US20100104990A1 (en) * 2008-10-23 2010-04-29 Sarmiento-Darkin Wladimir Y Wide flame burner

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1159356A (en) * 1979-10-25 1983-12-27 Kurt Skoog Method and device for producing microdroplets of fluid
CH651373A5 (en) * 1981-05-19 1985-09-13 Heberlein Textildruck Ag Supplementary burner on an installation for incinerating waste liquids or watery pastes
CA1209182A (en) * 1984-01-04 1986-08-05 Charles E. Capes Wear resistant atomizing nozzle assembly
DE3426488A1 (de) * 1984-07-18 1986-01-30 Deutsche Babcock Werke AG, 4200 Oberhausen Brenner fuer fluessige, insbesondere feste anteile enthaltende brennstoffe
US4616784A (en) * 1984-11-20 1986-10-14 Parker Hannifin Corporation Slurry atomizer
DE3518080A1 (de) * 1985-05-20 1986-11-20 Stubinen Utveckling AB, Stockholm Verfahren und vorrichtung zum verbrennen fluessiger und/oder fester brennstoffe in pulverisierter form
JPS6233214A (ja) * 1985-08-07 1987-02-13 Hitachi Ltd 石炭水スラリアトマイザ
US4623906A (en) * 1985-10-31 1986-11-18 International Business Machines Corporation Stable surface coating for ink jet nozzles
US4858538A (en) * 1988-06-16 1989-08-22 Shell Oil Company Partial combustion burner
AT400181B (de) * 1990-10-15 1995-10-25 Voest Alpine Ind Anlagen Brenner für die verbrennung von feinkörnigen bis staubförmigen, festen brennstoffen
US5228624A (en) * 1992-03-02 1993-07-20 Mensink Daniel L Swirling structure for mixing two concentric fluid flows at nozzle outlet

Also Published As

Publication number Publication date
DE59302010D1 (de) 1996-05-02
EP0565814A2 (de) 1993-10-20
DK0565814T3 (da) 1996-05-20
JP3557437B2 (ja) 2004-08-25
US5335608A (en) 1994-08-09
EP0565814A3 (en) 1993-11-24
DE4212360A1 (de) 1993-10-14
JPH06317309A (ja) 1994-11-15
ATE136106T1 (de) 1996-04-15
ES2085659T3 (es) 1996-06-01

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