EP0182175A2 - Pulvérisateur avec calotte de répartition rapportée pour la réduction de l'émission en oxyde nitrique pendant la combustion de combustibles liquides - Google Patents

Pulvérisateur avec calotte de répartition rapportée pour la réduction de l'émission en oxyde nitrique pendant la combustion de combustibles liquides Download PDF

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Publication number
EP0182175A2
EP0182175A2 EP85113970A EP85113970A EP0182175A2 EP 0182175 A2 EP0182175 A2 EP 0182175A2 EP 85113970 A EP85113970 A EP 85113970A EP 85113970 A EP85113970 A EP 85113970A EP 0182175 A2 EP0182175 A2 EP 0182175A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
distributor cap
bores
mixing chamber
fuel
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.)
Granted
Application number
EP85113970A
Other languages
German (de)
English (en)
Other versions
EP0182175A3 (en
EP0182175B1 (fr
Inventor
Klaus-Dieter Dipl.-Ing. Rennert
Helmut Ing. Grad. Martin
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.)
Hitachi Zosen Inova Steinmueller GmbH
Original Assignee
L&C Steinmueller 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 L&C Steinmueller GmbH filed Critical L&C Steinmueller GmbH
Priority to AT85113970T priority Critical patent/ATE53250T1/de
Publication of EP0182175A2 publication Critical patent/EP0182175A2/fr
Publication of EP0182175A3 publication Critical patent/EP0182175A3/de
Application granted granted Critical
Publication of EP0182175B1 publication Critical patent/EP0182175B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
    • F23D11/102—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber

Definitions

  • the invention relates to an atomizer nozzle combination comprising a primary nozzle and an attached distributor cap provided with directional bores to reduce nitrogen oxide emissions during the combustion of liquid fuels.
  • Y atomizers are also known in which large and small outlet bores alternate at regular intervals or in which one nozzle half has large and the other nozzle half has small outlet bores.
  • the arrangement of the outlet bores creates fuel-rich and low-fuel combustion zones. In the zone with excess fuel, the nitrogen oxides generated are reduced to molecular nitrogen.
  • All of the atomizers described above are operated both on the fuel (heating oil) and on the atomizer medium side at high pressures which, depending on the throughput and working range, are between 8 and 20 bar at full load. Because of these high pressures, there are still relatively high overpressures in the nozzle outlet cross-section, so that the explosion at explosive pressure occurs explosively directly behind the outlet of the mouth. In this way, one of the requirements for low NOx combustion, namely, a long single fuel jet is at least partially destroyed.
  • a two-stage design of the nozzle combination provides a clear separation between the atomizing function - first stage - and distribution function - second stage. This arrangement enables both tasks (atomizing / distributing) to be optimally solved.
  • the atomization quality is adversely affected by the different pressure conditions in the mixing channel. As a result, the droplet size spectrum generated is shifted to larger droplets which no longer burn out completely in the flame and increase the soot emission.
  • the object of the invention is to provide an atomizer nozzle for liquid fuel, with which the NO x emission can be further reduced compared to the known atomizing devices.
  • the nozzle combination according to the invention ideally fulfills all previously known requirements for low-NO combustion.
  • the nozzle combination according to the invention has three relaxation stages connected in series.
  • the first expansion takes place when entering the first mixing chamber, the second when entering the second mixing chamber, the third expansion stage takes place at the mouth cross section of the distributor cap. There is lower pressure, the individual jets remain directed longer. Due to the asymmetrical distribution of the outlet cross section on the distributor cap, a fuel-rich combustion zone with a reducing atmosphere is formed in accordance with the position of the maximum of the outlet cross section.
  • the asymmetrical distribution of the outlet cross section is preferably achieved in that different sectors of the distributor cap are provided with holes of different sizes and / or numbers, seen in the circumferential direction.
  • each half is provided with the same number of holes.
  • nozzle combination according to the invention is arranged in a vertical combustion chamber wall, it is expedient for a maximum of the outlet cross-sectional distribution to be at the bottom and a minimum at the top. With such an arrangement, a very long flame path is achieved in the more fuel-rich zone compared to a symmetrical nozzle, and there is also a better distribution of the heat load.
  • the fuel flow is also broken down into partial flows which are connected to the mixing chamber (3) via inlet openings (5).
  • the inlet openings for the partial fuel flows open at right angles into the first mixing chamber.
  • the first mixing chamber is formed from a base part and a nozzle (6).
  • the nozzle bores (7) are uniform and are preferably arranged regularly in the circumference of the nozzle.
  • the mixture of atomizing medium and fuel passes through the nozzle openings of the nozzle (6) into a second mixing chamber (8) which is formed by the nozzle (6) and the distributor cap (9) attached.
  • holes of different sizes (10, 11) are arranged on one side, smaller holes (10) in one half - larger holes (11) in the other half.
  • the distributor cap and nozzle are attached to the casing tube using a cap nut (12).
  • the burner combination described with reference to FIGS. 1-3 shows an asymmetrical distribution over two halves, i. H. on 180 ° sectors related to the axis of the distributor cap. Other sector angles are of course covered by the invention. It is also not necessary for the sectors to have the same number of holes. So it is quite conceivable that (see FIG. 2) there are three holes in one sector and four in the other sector.
  • the nozzle combination When using the nozzle combination in a combustion system, the nozzle combination is arranged horizontally in a vertical combustion chamber wall. It is preferred that a maximum of the outlet cross-section distribution is at the bottom and a minimum of the outlet cross-section distribution is at the top. In connection with the embodiment described with the aid of the figures, this means that in FIG. 2 there is “below” on the left, while “above” is on the right when the drawing plane is considered as the combustion chamber wall.
  • FIG. 2 shows a view from direction A of FIG. 1.
  • the circular bores which are regularly arranged around the circumference and which have a smaller diameter on one side than in the other half can be seen.
  • Fig. 3 shows a section through the nozzle combination according to the invention along the line B-B '.
  • the supply of fuel and atomizing medium can also be interchanged without endangering the operation of the mixing rooms 3 and 8 and the distributor cap 9.

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)
  • Chimneys And Flues (AREA)
EP85113970A 1984-11-17 1985-11-02 Pulvérisateur avec calotte de répartition rapportée pour la réduction de l'émission en oxyde nitrique pendant la combustion de combustibles liquides Expired - Lifetime EP0182175B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85113970T ATE53250T1 (de) 1984-11-17 1985-11-02 Zerstaeuber mit aufgesetzter verteilerkappe zur reduzierung der stickoxid-emission bei der verbrennung von fluessigen brennstoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3442148 1984-11-17
DE19843442148 DE3442148A1 (de) 1984-11-17 1984-11-17 Zerstaeuberduese mit aufgesetzter verteilerkappe zur reduzierung der stickoxid-emission bei der verbrennung von fluessigen brennstoffen

Publications (3)

Publication Number Publication Date
EP0182175A2 true EP0182175A2 (fr) 1986-05-28
EP0182175A3 EP0182175A3 (en) 1987-09-09
EP0182175B1 EP0182175B1 (fr) 1990-05-30

Family

ID=6250605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113970A Expired - Lifetime EP0182175B1 (fr) 1984-11-17 1985-11-02 Pulvérisateur avec calotte de répartition rapportée pour la réduction de l'émission en oxyde nitrique pendant la combustion de combustibles liquides

Country Status (3)

Country Link
EP (1) EP0182175B1 (fr)
AT (1) ATE53250T1 (fr)
DE (2) DE3442148A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812241A1 (de) * 1998-03-20 1999-10-07 Univ Karlsruhe Flüssigkeitszerstäuber für zu zerstäubende Flüssigkeit

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3600550A1 (de) * 1986-01-10 1987-07-16 Krupp Polysius Ag Einblasduese
DE4238736A1 (de) * 1992-11-17 1994-05-19 Babcock Feuerungssysteme Zerstäuber für einen Ölbrenner
KR200210396Y1 (ko) * 2000-07-18 2001-01-15 박석호 산업용 보일러의 연료분사장치
US8505310B2 (en) 2008-10-22 2013-08-13 General Electric Company Gas turbine ejector and method of operation
DE102011013950A1 (de) * 2011-03-14 2012-09-20 Air Liquide Deutschland Gmbh Brenner und Verfahren zum Betreiben eines Brenners

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB631204A (en) * 1947-03-31 1949-10-28 Delphis Charles Breault Improvements in or relating to a liquid fuel burner
JPS4717395Y1 (fr) * 1968-07-24 1972-06-16
FR2212497B1 (fr) * 1972-12-31 1976-11-19 Ishikawajima Harima Heavy Ind
US4383649A (en) * 1980-07-18 1983-05-17 John Zink Company Fuel oil atomizer
IT1161905B (it) * 1983-02-24 1987-03-18 Ente Naz Energia Elettrica Atomizzatore per bruciatore di combustibili liquidi

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812241A1 (de) * 1998-03-20 1999-10-07 Univ Karlsruhe Flüssigkeitszerstäuber für zu zerstäubende Flüssigkeit

Also Published As

Publication number Publication date
DE3578005D1 (de) 1990-07-05
DE3442148C2 (fr) 1988-05-05
ATE53250T1 (de) 1990-06-15
EP0182175A3 (en) 1987-09-09
DE3442148A1 (de) 1986-05-28
EP0182175B1 (fr) 1990-05-30

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