WO1987006998A1 - Procede de fonctionnement d'un bruleur a gaz de premelange - Google Patents

Procede de fonctionnement d'un bruleur a gaz de premelange Download PDF

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Publication number
WO1987006998A1
WO1987006998A1 PCT/DE1987/000223 DE8700223W WO8706998A1 WO 1987006998 A1 WO1987006998 A1 WO 1987006998A1 DE 8700223 W DE8700223 W DE 8700223W WO 8706998 A1 WO8706998 A1 WO 8706998A1
Authority
WO
WIPO (PCT)
Prior art keywords
burner
gas
auxiliary
nozzle
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.)
Ceased
Application number
PCT/DE1987/000223
Other languages
German (de)
English (en)
Inventor
Jürgen Schilling
Johannes Stosiek
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.)
Vaillant GmbH
Original Assignee
Joh Vaillant GmbH and Co
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 Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Priority to AT87902439T priority Critical patent/ATE62539T1/de
Priority to JP62502926A priority patent/JPH01500847A/ja
Priority to DE8787902439T priority patent/DE3769291D1/de
Publication of WO1987006998A1 publication Critical patent/WO1987006998A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone

Definitions

  • the present invention relates to a method for operating a premixed gas burner according to the Oberbe ; g iff of the main claim.
  • Vormi gas burners are known, for example from DE PS 2 611 392.
  • the present invention is therefore based on the object of developing an operating method for such a burner which is distinguished by a minimal nitrogen oxide emission.
  • FIG. 1 shows the principle of the method according to the invention
  • FIG. Three shows a variant of the invention
  • FIGS. Four to six possible burner designs for carrying out the method
  • FIGS. seven and eight a boiler burner and the application of the invention thereon
  • FIGS. ten and eleven further embodiments of the invention
  • the basic principle of the invention is that fuel, in particular gas, is supplied to the secondary air of the burner in order to minimize the NO x emission.
  • the gas may be at an oil burners for at game vaporized or gasified oil or oil aerosol han ⁇ thereof as punching, at a Fl ü 'ssi ggasbrenner to gasified liquid-gas, such as propane or butane or mixtures thereof, at a natural gas burner at Natural gas and a city gas burner for city gas. Pure hydrogen could be used with a hydrogen burner. This means that preferably the same fuel gas is mixed into the secondary air, which also serves to supply the actual burner, but this may or may not be the case. Another gas could also be used in this way.
  • the invention is based on the knowledge that the formation of nitrogen oxides can generally be reduced by an oxygen-poor and reducing atmosphere.
  • the limit of oxygen depletion is an increase in the proportion of CO in the exhaust gas.
  • the atmosphere is artificially depleted in its oxygen by a substoichiometric, non-ignitable addition of fresh gas to the secondary air takes place.
  • the method is carried out by tapping gas from the gas supply line and blowing it out through nozzles or slots into areas of the burner through which the secondary air passes.
  • a combustion tube 1 is designed as a cylindrical hollow body with a horizontal axis and has an interior 2 which is acted upon by a premixing gas nozzle (not shown) with the entrainment of primary air. Accordingly, a fuel gas / P ⁇ ' mär Kunststoffgemi is transported in the interior 1.
  • a branch leads from the gas feed line leading to the premixing nozzle to a secondary line 3 which ends in distributor pipes 4 which are arranged on both sides in parallel, but at a distance and on the underside of the actual burner pipe.
  • distributor pipes 4 At the top 5 of these distribution pipes there are outlet openings for fuel gas, which emerges conically in an area 6 and engages in the area of the secondary air symbolized by arrows 7 and mixes with it.
  • FIG. Three shows a premix gas burner in the manner of a series burner with a plurality of burner chambers 12 arranged parallel and at a distance from one another. The distances are denoted by 13, the fuel mixture outlet openings by 14.
  • the gas nozzle 15 blows into the inlet ejector channel 16 on and re ' . eats 17 primary air from the gap.
  • the gas jet bears against the inner wall 19 of the injector 16 and at a further distance there are 20 gas outlet openings from which fuel gas enriched with air emerges due to the flow conditions in the injector tube, which now continues lengthways the outer periphery of the burner chamber or the upper end of the injector tube at a distance of 13 and thus artificially processes the secondary air which also runs along here in terms of its oxygen content.
  • FIG. Four shows a grate burner constructed from a plurality of burner chambers with three burner chambers 12, between see those distances 13 through which the secondary air sweeps from bottom to top.
  • a plurality of injecting test tubes 16, which are arranged one behind the other, are provided per burner chamber, each of which is fed by an associated gas nozzle 15.
  • Auxiliary gas nozzles 5 are provided between these gas nozzles and blow fuel gas from the fuel gas supply line 21 into the intermediate spaces 13.
  • this fuel gas will mix with the secondary air and create the oxygen-depleted atmosphere of the secondary! uft lead.
  • FIG. Five shows a burner similar to FIG. 4, seen from above, in which three burner tubes are shown as a cylindrical body in a view of the jacket.
  • These burner tubes 22 with horizontal axes analogous to that shown in FIG. 1 have a large number of fuel gas mixture outlet openings 23 in their upper half region. Gas is blown into the interior of the burner tubes via gas nozzles 15, specifically into the injector channel 16 mentioned above. Primary air is entrained through the gap 17.
  • the openings 20 can be designed as shown enlarged in the figure six.
  • the exemplary embodiment in FIG. 7 is again a Kessei burner with individual burner tubes 1 lying next to one another.
  • a Hi If burner tube 25 is arranged between two burner tubes and touches the two burner tubes with its outer circumference.
  • the inner space 26 of the burner tube is fed with a fuel gas / air mixture, for example via a burner nozzle.
  • At the top 27 there are a plurality of Brenngemi seh outlet openings, so that here now the secondary air for the burner tubes 1 represents Brenn ⁇ gas! uftgemi sees out of the interior 26 of the auxiliary pipe 25 and represents the oxygen-depleted atmosphere of the secondary air already described for the actual main burner pipes 1. It is essential that the secondary! uft -Gasgemi must not be ignitable, that is, the proportion of the fuel gas mixed with the secondary air is so small that this mixture is not ignitable.
  • Figure eight shows how the three tubes of figure seven are fed. From the common fuel gas! Egg 21 is blown through three nozzles, two main nozzles 15 and an auxiliary nozzle 5, fuel gas into ector tubes 16, of which the middle one only serves to blow the fuel gas. enriched secondary air to form the flames of the two outer main pipes.
  • the embodiment according to FIG. 9 can be used. Regardless of the design of the burner tube itself, a sieve is introduced into the area of the secondary air, this sieve ensuring a better distribution of the secondary air / fuel gas mixture or forming a backstop for the possibly igniting secondary air / fuel gas mixture .
  • the embodiment is sbe. spi ei of Figure 9 that the burner is designed approximately as in Figure three, that is, outlet openings 20 are provided, from which the air-enriched fuel gas for enrichment of the secondary air in the fuel gas takes place.
  • sieves 28 are provided where the mixture has access to the flames of the main burner.
  • the sieves consist of metal 1 wire mesh. The idea of these screens can also be transferred to the other burner tube constructions.
  • the exemplary embodiment according to FIG. 10 shows a burner working particularly advantageously.
  • the entire burner area covering upper plate 30 is provided, which has all Brenngemi se outlet openings, so that flames form above the plate 30.
  • Below the plate 30 there is an intermediate space 31 which is delimited at the bottom by a lower plate 32.
  • Sections 34 and 35 are formed in any number by retracted intermediate walls 33 between the upper and lower plates 32. All sections 34 are each assigned an injector tube 36 into which fuel gas is blown through a nozzle 15, entraining primary air.
  • the sections 35 are assigned another injector tube 36, into which 5 fuel gas is blown from an auxiliary nozzle.
  • the sections 35 are provided on both sides of two sections 34 and serve to supply the secondary flames / fuel gas mixture for oxygen depletion to the main flames of the burner occurring on the upper side of the sections 34.
  • All sections 34 are in the middle of the burner.
  • the burners according to FIG. 10 can have almost any length or width extension. They can be polygonal or round in cross-section. The only important thing is that each main burner section 34 is surrounded by a secondary air supply section 35, if possible on all sides.
  • the upper sides of the sections 35 can in this case be formed by metal sieves 28 according to FIG. 9 or also by plate areas which are provided with many holes arranged next to one another.
  • FIG. 11 shows, by way of example, that the sections 34 or 35 do not necessarily have to have the same configuration over the entire length or width of the burner, so in one case there can be narrower and wider areas varying over the length in order to both to avoid unwanted CO formation, as well as to facilitate the ignition.
  • the invention has the advantage that the ratio of admixed secondary air to the fuel gas mixture (primary air and gas) remains largely the same both in full load and in part load ratio. This results in an efficiency that remains the same over the course of time, or one that differs in part from that of the Deviating combustion quality which is not essential at full load. This enables the combustion chamber to be closed as much as possible.
  • auxiliary gas nozzle associated with a main gas nozzle (15).
  • the ratio is 0.05 to 0.9 and for LPG between 0.02 to 1.3.
  • FIGS. Twelve and thirteen show a possible application of the invention also to a gas fan burner, since the previous exemplary embodiments all related to atmospheric burners.
  • the figure twelve shows a first embodiment of a fan burner, which has a flame tube 50 which is attached to a housing 51.
  • the latter has an air inlet 52, to which air is supplied by a fan (not shown).
  • the interior of the housing 51 or of the flame tube 50 is penetrated by a gas supply tube 53, which extends via a solenoid valve a gas network not shown ter is fed.
  • the f1 ammensei ti ge part 54 of the flame tube is provided with a baffle plate 55 which has air passages 56 through which the interior 62 of the housing 51 is connected to the interior of the end 54 of the flame tube.
  • the baffle plate is penetrated by a nozzle head 57, the gas outlet nozzles 58 of which are arranged radially on a jacket of the nozzle head 57.
  • a slot 56 is assigned to each gas outlet nozzle 57.
  • auxiliary gas nozzles 59 are arranged on the jacket of the gas supply pipe 53, via which gas exits into the interior 62, namely upstream of the baffle plate 55.
  • the throughput of gas through the auxiliary gas nozzles 59 with respect to the gas throughput through the main gas nozzles 58 is reduced the previously described design rule. Air for the burner is thus mixed with the natural gas according to the principles already explained.
  • the flame tube 50 has a tube insert 60, through which an annular secondary air duct 61 is created.
  • the auxiliary gas nozzles 59 are designed or arranged such that they can only blow the auxiliary gas into the secondary air ring duct. The primary air remains unaffected by the auxiliary gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

Un tuyau de combustion (1) se présente sous la forme d'un corps creux cylindrique avec un axe horizontal et comporte une chambre intérieure (2) qui est alimentée depuis un ajutage de gaz de prémélange, non représenté, avec entraînement de l'air primaire. Dans la chambre intérieure (2), un mélange gaz de combustion/air primaire est transporté en conséquence. De la conduite d'amenée de gaz menant à l'ajutage de prémélange part une dérivation qui conduit à une canalisation secondaire (3) se terminant dans des tuyaux distributeurs (4) qui sont agencés en parallèle sur les deux côtés du tuyau de combustion proprement dit mais à distance et au-dessous de ce dernier. Sur le dessus (5) de ces tuyaux distributeurs se trouvent des ouvertures de dégagement du gaz de combustion qui sort vers le haut avec une forme de cône dans une région (6) et en même temps pénètre dans la région de l'air secondaire symbolisée par la flèche (7) et se mélange avec lui. De cette manière, un mélange appauvri en oxygène parvient en particulier au niveau de la base (8) de la flamme principale (9), ledit appauvrissement étant effectué par le gaz de combustion lui-même.
PCT/DE1987/000223 1986-05-13 1987-05-13 Procede de fonctionnement d'un bruleur a gaz de premelange Ceased WO1987006998A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT87902439T ATE62539T1 (de) 1986-05-13 1987-05-13 Vormischgasbrenner.
JP62502926A JPH01500847A (ja) 1987-05-13 1987-05-13 予混合ガスバーナーの使用方法
DE8787902439T DE3769291D1 (de) 1986-05-13 1987-05-13 Vormischgasbrenner.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP3616015.6 1986-05-13
DE3616015 1986-05-13
DEP3630281.3 1986-09-05
DE3630281 1986-09-05

Publications (1)

Publication Number Publication Date
WO1987006998A1 true WO1987006998A1 (fr) 1987-11-19

Family

ID=25843714

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1987/000223 Ceased WO1987006998A1 (fr) 1986-05-13 1987-05-13 Procede de fonctionnement d'un bruleur a gaz de premelange

Country Status (3)

Country Link
EP (1) EP0271500B1 (fr)
DE (1) DE3769291D1 (fr)
WO (1) WO1987006998A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004740A1 (fr) * 1988-10-20 1990-05-03 Airoil-Flaregas Limited Ameliorations apportees aux bruleurs
EP0331037A3 (en) * 1988-02-27 1990-05-09 Osaka Gas Co., Ltd Gas burner
EP0425055A3 (en) * 1989-10-25 1991-11-13 Tokyo Gas Co., Ltd. Burner for reducing nox emissions
EP0521568A3 (en) * 1991-07-05 1993-05-26 Tokyo Gas Co., Ltd. A low-nox gas burner
EP0534554A3 (en) * 1991-09-24 1993-06-09 Tokyo Gas Co., Ltd. A burner low in the generation of nitrogen oxides and a small combustion apparatus
CN110566947A (zh) * 2019-09-16 2019-12-13 浙江力聚热水机有限公司 一种超低氮预混燃气燃烧器及其燃烧方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111578283A (zh) * 2020-05-06 2020-08-25 郑州博纳热能设备有限公司 一种低氮氧化物排放的天然气燃烧器

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2142014A (en) * 1937-12-02 1938-12-27 John S Zink Gas burning means
US2986207A (en) * 1955-08-15 1961-05-30 Clifford A Scogin Gas burner
DE1629968A1 (de) * 1967-02-22 1971-04-01 Franz Wonisch Brenner fuer verschiedene Gasarten
FR2050942A5 (fr) * 1969-06-30 1971-04-02 Jauzac Serge
FR2394753A1 (fr) * 1977-06-17 1979-01-12 Sulzer Ag Bruleur a combustibles liquides ou gazeux ou liquides et gazeux
GB1565247A (en) * 1978-01-25 1980-04-16 Cromartie Kilns Ltd Burners for kilns
DE3022763A1 (de) * 1980-06-14 1982-01-14 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Brenner fuer ein gasbeheiztes geraet
DE8526226U1 (de) * 1985-09-13 1986-01-02 Ruhrgas Ag, 4300 Essen Heizvorrichtung
DE8503838U1 (de) * 1985-02-08 1986-02-13 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Reihenbrenner für ein gasbeheiztes Gerät
EP0178198A2 (fr) * 1984-09-04 1986-04-16 TOTALGAZ COMPAGNIE FRANCAISE DES GAZ LIQUEFIES Société Anonyme dite Brûleur à mélange préalable intégré et à flamme pilote intégrée

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2142014A (en) * 1937-12-02 1938-12-27 John S Zink Gas burning means
US2986207A (en) * 1955-08-15 1961-05-30 Clifford A Scogin Gas burner
DE1629968A1 (de) * 1967-02-22 1971-04-01 Franz Wonisch Brenner fuer verschiedene Gasarten
FR2050942A5 (fr) * 1969-06-30 1971-04-02 Jauzac Serge
FR2394753A1 (fr) * 1977-06-17 1979-01-12 Sulzer Ag Bruleur a combustibles liquides ou gazeux ou liquides et gazeux
GB1565247A (en) * 1978-01-25 1980-04-16 Cromartie Kilns Ltd Burners for kilns
DE3022763A1 (de) * 1980-06-14 1982-01-14 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Brenner fuer ein gasbeheiztes geraet
EP0178198A2 (fr) * 1984-09-04 1986-04-16 TOTALGAZ COMPAGNIE FRANCAISE DES GAZ LIQUEFIES Société Anonyme dite Brûleur à mélange préalable intégré et à flamme pilote intégrée
DE8503838U1 (de) * 1985-02-08 1986-02-13 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Reihenbrenner für ein gasbeheiztes Gerät
DE8526226U1 (de) * 1985-09-13 1986-01-02 Ruhrgas Ag, 4300 Essen Heizvorrichtung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331037A3 (en) * 1988-02-27 1990-05-09 Osaka Gas Co., Ltd Gas burner
WO1990004740A1 (fr) * 1988-10-20 1990-05-03 Airoil-Flaregas Limited Ameliorations apportees aux bruleurs
EP0425055A3 (en) * 1989-10-25 1991-11-13 Tokyo Gas Co., Ltd. Burner for reducing nox emissions
EP0521568A3 (en) * 1991-07-05 1993-05-26 Tokyo Gas Co., Ltd. A low-nox gas burner
EP0534554A3 (en) * 1991-09-24 1993-06-09 Tokyo Gas Co., Ltd. A burner low in the generation of nitrogen oxides and a small combustion apparatus
CN110566947A (zh) * 2019-09-16 2019-12-13 浙江力聚热水机有限公司 一种超低氮预混燃气燃烧器及其燃烧方法

Also Published As

Publication number Publication date
DE3769291D1 (de) 1991-05-16
EP0271500A1 (fr) 1988-06-22
EP0271500B1 (fr) 1991-04-10

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