EP0414050A2 - Tête de brûleur - Google Patents

Tête de brûleur Download PDF

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Publication number
EP0414050A2
EP0414050A2 EP90115233A EP90115233A EP0414050A2 EP 0414050 A2 EP0414050 A2 EP 0414050A2 EP 90115233 A EP90115233 A EP 90115233A EP 90115233 A EP90115233 A EP 90115233A EP 0414050 A2 EP0414050 A2 EP 0414050A2
Authority
EP
European Patent Office
Prior art keywords
air
oil
head according
combustion head
combustion
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
EP90115233A
Other languages
German (de)
English (en)
Other versions
EP0414050A3 (en
EP0414050B1 (fr
Inventor
Siegfried Müller
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.)
Abig Werke Carry Gross & Co KG GmbH
Original Assignee
Abig Werke Carry Gross & Co KG 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 Abig Werke Carry Gross & Co KG GmbH filed Critical Abig Werke Carry Gross & Co KG GmbH
Publication of EP0414050A2 publication Critical patent/EP0414050A2/fr
Publication of EP0414050A3 publication Critical patent/EP0414050A3/de
Application granted granted Critical
Publication of EP0414050B1 publication Critical patent/EP0414050B1/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
    • F23D11/36—Details
    • F23D11/40—Mixing tubes; Burner heads

Definitions

  • the invention relates to a combustion head for an oil burner with an oil atomizing device having an oil supply pipe and a combustion air supply device surrounding the same.
  • Such a combustion head is known from the European patent 0 109 585 and has a chamber surrounding the oil atomization device, which extends to a diaphragm arranged downstream of the outlet of the oil atomizer device, which is provided with an aperture opening which is coaxially associated with a mixing tube.
  • the oil mist emerging at the outlet of the oil atomization device passes through the orifice together with the combustion air into the mixing tube and is mixed there with recirculated flame gases.
  • the flame gases are recirculated due to an injector effect, which is generated with the help of radial passages in the mixing tube. So that the injector effect can take place, the mixing tube is surrounded by a cylindrical flame tube, the upstream end of which is sealingly connected to the end wall of the chamber which carries the diaphragm.
  • the invention has for its object to provide a combustion head of the type mentioned with a flue gas recirculation, which is characterized by a low nitrogen oxide emission even at low oil pressures and inaccurate atomization of the oil and with a flame pattern similar to a yellow burner has the advantageous properties of a blue burner with regard to the exhaust gases.
  • combustion air supply device in the vicinity of the outlet of the oil atomization device has a plurality of radially extending air channel end pieces, each of which has radially extending air outlet slots on the end facing the flame in relation to the longitudinal axis of the combustion head.
  • the air duct end pieces are designed as simple cylindrical air pipe end pieces.
  • the one The ends of the air pipe end pieces adjacent to the outlet of the oil atomization device are each connected to an air duct pipe, preferably running parallel to the oil feed pipe of the oil atomization device, through which the combustion air is guided to the air outlet slots.
  • the air pipe end pieces are preferably arranged along a conical surface, the tip of which lies near (about 10-50 mm behind the nozzle in the direction of flow of the oil) the outlet of the oil atomization device and whose cone angle can be adapted to the spray angle of the pressure atomizer nozzle of the oil atomization device.
  • the tip of the conical surface can be up to 50 mm behind the outlet of the oil atomization device.
  • the air outlet slots are each arranged on the flame-facing part of the jacket of the air pipe end piece. It is possible for the air outlet slots to be arranged exactly on the surface line facing the flame or laterally offset from it. In the first case the air exits essentially parallel to the oil feed pipe and to the axis of the oil mist and in the second case spirally to the axis of the oil mist cone.
  • the arrangement of the air duct pipes can be such that they run in the vicinity of the oil supply pipe and are bent radially outwards in the vicinity of the outlet of the oil atomization device and thereby pass into the air pipe end pieces.
  • the air duct pipes are arranged in a larger pitch circle and merge into these at the outer end of the air duct end pieces.
  • baffles are arranged along the air outlet slots, which impart an additional swirl to the emerging combustion air, whereby the mixing of the various components in the combustion head is supported.
  • the number of air outlet slots arranged in a star shape around the outlet of the oil atomization device is 6.
  • the optimal number depends on the lengths and diameters of the air duct tubes.
  • the air outlet slots have a length that can be greater than the distance between the outlet of the oil atomization device and the closest end of the air outlet slots.
  • Fig. 1 shows a combustion head for a gasification oil burner in longitudinal section without the walls of the combustion chamber surrounding the combustion head.
  • the combustion head is fastened to a burner neck 1, which projects into the combustion chamber and is covered by a circular disk-shaped end plate 2, which can be seen in a plan view in FIG. 2.
  • An oil feed pipe 3 extends through the end plate 2 along the central longitudinal axis of the burner neck 1 and is connected via an oil line to an oil feed pump which conveys oil from an oil tank to the combustion head.
  • a pressure atomizing nozzle 4 is provided at the front end of the oil supply pipe 3 pointing to the right in FIG. 1, a pressure atomizing nozzle 4 is provided.
  • the pressure atomizing nozzle 4 is a pressure swirl nozzle or simplex nozzle which has tangentially arranged swirl chamber slots in the interior in order to set the oil into rotation, so that after leaving the nozzle bore 5 the centrifugal force escapes radially and generates an oil spray cone.
  • the pressure supplied by the oil pump is in the range between 4 and bar.
  • the area of the combustion head located in front of the nozzle bore 5 forms a gasification zone for the oil mist, which can be ignited with the help of one or two ignition electrodes, not shown in the drawing.
  • the combustion air required for the combustion passes through the burner neck 1 and eight air duct pipes 6 to 13 to eight air duct end pieces 14 to 21.
  • FIG. 5 shows another variant of the combustion air duct compared to the exemplary embodiment according to FIG. 1.
  • the air passes through the burner neck 1 into eight air duct pipes 30 to 37 to eight air duct end pieces 39 to 46.
  • the air duct end pieces 39 to 46 in the embodiment shown in the drawing have the shape of pipe end pieces that correspond to those in FIG. 5 to the right pointing ends of the air duct pipes 30 to 37 are connected.
  • the arrangement can be such that the air duct pipes 30 to 37 have a bent section 47 which projects outward away from the oil supply pipe 3 and opens into the air duct end pieces 39 to 46 projecting inwards to the oil atomizing nozzle 4.
  • the air duct end pieces 14 to 21 have the shape of pipe end pieces which are connected to the ends of the air duct pipes 6 to 13 pointing to the right in FIG. 1.
  • the arrangement can be such that the air duct pipes 6 to 13 have a bent section 22 at the front end, which is bent inwards towards the oil supply pipe 3 and the pressure atomizing nozzle 4 and on which the air duct end pieces 14 to 21 are arranged at right angles, so that the Air duct end pieces 14 to 21 do not extend at right angles to the longitudinal axis of the oil atomizing nozzle 4, but are somewhat inclined and are therefore arranged along a conical surface, the conical tip of which lies at an obtuse angle in the region of the nozzle bore of the pressure atomizing nozzle 4.
  • the air duct end pieces 14 to 21 and 39 to 46 which can be seen in FIGS. 2 and 6 in a view from the front are, are closed at their ends by locking washers 23 and 48.
  • the combustion air introduced into the air duct tubes 6 to 13 or 30 to 37 and air duct end pieces 14 to 21 or 39 to 46 with the aid of a blower leaves the air duct end pieces 14 to 21 or 39 to 46 via air outlet slots 24 or 49 which are in the jacket of the Air duct end pieces 14 to 21 or 39 to 46 are provided on the forward-facing side and extend over most of the length of the air duct end pieces 14 to 21 or 39 to 46.
  • the air outlet slots 24 and 49 are laterally offset from the arrangement shown in FIG. 2 according to FIG. 6 by the same amount, so that the escaping combustion air is not substantially forward and in the direction of the elongated axis of the Oil supply pipe is blown, but also has a tangential component through which the combustion air is given an additional swirl.
  • the slots can be offset laterally, as already mentioned, or provided with a guide plate 29 in the manner shown in FIG. 4 be, which extends along an air outlet slot 24 and deflects the emerging combustion air laterally.
  • the air duct end pieces 39 to 46 shown in FIG. 5 can also have air outlet slots 49 with a guide plate 29 as shown in FIG. 4.
  • Fig. 7 shows an embodiment of the invention, in which the components already mentioned are provided with the same reference numerals as in the above description.
  • the burner neck 1 can be seen, which at its end pointing to the right in FIG. 7 does not have an end plate 2 but a coni rule's end cover 32 is closed.
  • the conical end cover 32 has a plurality of openings arranged along its outer circumference, through which air can get into the air duct tubes 6 to 13 from the inside of the burner neck 1.
  • the air duct pipes 6 to 13 are sealingly attached to the conical end cover 32, so that the conical end cover 32 on the one hand has the task of a mechanical holder and on the other hand has the task of making the flow conditions as favorable as possible.
  • the air duct pipes 6 to 13 introduce the air into air duct end pieces 14 to 21, which are angularly connected to them and are provided with air outlet slots 24, which are shown particularly clearly in FIG. 8.
  • the angle between the air duct tubes 6 to 13 and the air duct end pieces 14 to 21 is made obtuse.
  • eight, nine or ten air duct pipes 6 to 13 with the corresponding air duct end pieces 14 to 21 are provided.
  • the pressure atomizing nozzle 4 is fastened, as in the previously described exemplary embodiments, to the front end of the oil supply pipe 3, through which, in the direction of arrow 34, the one intended for combustion Oil arrives. 7 also shows an oil supply device 35 which allows the oil to be preheated. In addition, one can see a holder 36 fastened on the oil supply pipe 3 for an ignition device 37 with ignition electrodes 38. The ignition electrodes 38 are connected via an ignition line 39 to an ignition transformer which supplies the high voltage required to ignite the oil after the supply of air in the direction of arrow 40 and the oil in the direction of arrow 34 has started Has.
  • FIG. 8 shows a combustion head of the type according to FIG. 7 in a top view from the front.
  • the combustion head shown in Fig. 8 has a different number of air duct end pieces 14, 14 'to 21 with respect to the sectional plane shown in Fig. 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Meat, Egg Or Seafood Products (AREA)
EP90115233A 1989-08-23 1990-08-08 Tête de brûleur Expired - Lifetime EP0414050B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3927834A DE3927834A1 (de) 1989-08-23 1989-08-23 Verbrennungskopf
DE3927834 1989-08-23

Publications (3)

Publication Number Publication Date
EP0414050A2 true EP0414050A2 (fr) 1991-02-27
EP0414050A3 EP0414050A3 (en) 1992-01-08
EP0414050B1 EP0414050B1 (fr) 1994-12-28

Family

ID=6387704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90115233A Expired - Lifetime EP0414050B1 (fr) 1989-08-23 1990-08-08 Tête de brûleur

Country Status (3)

Country Link
EP (1) EP0414050B1 (fr)
AT (1) ATE116419T1 (fr)
DE (2) DE3927834A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4327088A1 (de) * 1992-09-01 1994-03-03 Sighard Grohsmann Brenner, insbesondere ein Industriebrenner
CN109764335A (zh) * 2019-03-07 2019-05-17 上海凌云瑞升燃烧设备有限公司 一种基于烟气外循环技术的燃烧器尾气降温降氮装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2410141C3 (de) * 1974-03-02 1978-10-26 Sieber, Rolf, 7501 Karlsbad Brenner for fluide Brennstoffe
DE2554263A1 (de) * 1975-12-03 1977-06-16 Richard Fetzner Brenner fuer fluide brennstoffe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4327088A1 (de) * 1992-09-01 1994-03-03 Sighard Grohsmann Brenner, insbesondere ein Industriebrenner
CN109764335A (zh) * 2019-03-07 2019-05-17 上海凌云瑞升燃烧设备有限公司 一种基于烟气外循环技术的燃烧器尾气降温降氮装置

Also Published As

Publication number Publication date
DE59008116D1 (de) 1995-02-09
EP0414050A3 (en) 1992-01-08
DE3927834A1 (de) 1991-02-28
ATE116419T1 (de) 1995-01-15
EP0414050B1 (fr) 1994-12-28

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