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WO2007134580A1 - Modélisation de flamme - Google Patents

Modélisation de flamme Download PDF

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Publication number
WO2007134580A1
WO2007134580A1 PCT/DE2007/000895 DE2007000895W WO2007134580A1 WO 2007134580 A1 WO2007134580 A1 WO 2007134580A1 DE 2007000895 W DE2007000895 W DE 2007000895W WO 2007134580 A1 WO2007134580 A1 WO 2007134580A1
Authority
WO
WIPO (PCT)
Prior art keywords
flame
fuel
oil
nozzles
gas
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/DE2007/000895
Other languages
German (de)
English (en)
Inventor
Ulrich Dreizler
Daniel Dreizler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2007134580A1 publication Critical patent/WO2007134580A1/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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber
    • 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
    • F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
    • F23D11/26—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed
    • F23D11/30—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed with return feed of uncombusted sprayed fuel to reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/002—Regulating fuel supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/50—Control of recirculation rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/09002—Specific devices inducing or forcing flue gas recirculation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00014—Pilot burners specially adapted for ignition of main burners in furnaces or gas turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00—Special features of, or arrangements for fuel supplies
    • F23K2900/05001—Control or safety devices in gaseous or liquid fuel supply lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/02—Controlling two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/08—Controlling two or more different types of fuel simultaneously

Definitions

  • the invention is based on a method or a device for carrying out this method according to the preamble of claim 1 or of claim 11.
  • a fundamental problem in the combustion of liquid or gaseous fuels via such methods, or devices consists in the formation or design of the flame on the one hand to save fuel the best possible effective heat transfer from the flame to the heat transfer material, such as water, eg , B. within a boiler, and on the other hand by the design or training of the flame to meet the increasingly stringent requirements for the detoxification of the exhaust gas.
  • the heat transfer material such as water, eg , B. within a boiler
  • the invention has for its object a method, or to develop a device for carrying out this method of the generic type, with recirculation of exhaust gas and without additional means projecting into the flame. This object is achieved by the method according to the invention according to the main claim and the burner head according to the invention according to claim 10.
  • the inventive method or the burner head according to the invention has over the described prior art has the advantage that the central flame or flame, in particular for fuel economy in size, regardless of the surrounding envelope flame, adjustable and thus modeled. This can be done by centrally one or two fuel nozzles are available, of which even one is switched off or by the amount of fuel supplied is changed. In any case, as a result of this intervention in the flame, at least the core flame can be modeled so small in the longitudinal section that a NO x -reducing internal recirculation of its exhaust gas occurs in the region of this central flame.
  • the invention relates not only to pure oil burners or gas burners, but also combined burners for oil and gas.
  • the change of the fuel supply takes place at least to the core flame in stages.
  • the one stage may be formed by fuel oil and the other stage by gas as fuel.
  • the core flame can be adjusted accordingly be modelable. This tap-change can be done regardless of whether each stage in turn can be changed in their performance. It is only known (EP 0 857 915 B1) to support a nuclear flame by a supporting flame, if necessary, without, however, contributing to its modeling. On the contrary, it can be assumed that such a supporting flame promotes a subsequent ignition of the main flame, but additionally introduces heating energy in the middle of the flame and this stimulates the pollutant formation of the nitrogen oxides NO x .
  • the change of the supply of the fuel to the core flame is continuous, wherein it is also continuously modelable.
  • the core flame can thereby be cool and free of flow, so that even there an internal recirculation of the exhaust gases in the envelope flame is possible, whereby NO x emissions are reduced.
  • a central recirculation of exhaust gas can be achieved via the fuel supply to the core flame in relation to that of the envelope flame, as a result of which the core flame can be controlled or the flame shape can be modeled.
  • the size ratio of envelope flame to core flame has a natural influence on the exhaust gas side of the core flame and corresponding to the exhaust gas recirculation concerned.
  • a fan burner serves as a central nozzle ⁇ lzerstäuberdüse, wherein the supplied via an oil pump under pressure fuel oil via a solenoid valve or needle shut-off and is ab interviewedbar.
  • a fuel oil version given an oil flow regulator can be arranged downstream of the oil pump, in particular in the return of the fuel oil line and downstream of the branch to the central nozzle and it can be arranged in the fuel lines to the nozzles, regardless of whether it is oil or gas nozzles, solenoid valves which serve according to a predetermined program for the formation of an optimum combustion, but above all also for the creation of a semi-hollow core flame with internal Abeasrezirkulation.
  • Figure 1 is a gas burner in longitudinal section.
  • FIG 3 shows an oil burner with 2-stage nuclear flame in longitudinal section.
  • FIG. 5 shows a hydraulic circuit diagram for a burner according to FIG. 2 or FIG. 4 and
  • FIG 6 shows a hydraulic circuit diagram for a burner according to FIG. 3.
  • FIG. 1 very greatly simplified and shown in longitudinal section in a gas burner 1 in a cross-sectional plane 2 a plurality of gas nozzles 3 arranged in a circle, by the operation of the gas burner, an annular envelope or main flame 4 is formed, which in their performance needs , For example, a boiler, is adjusted.
  • a gas nozzle 5 Centrally located between these outer gas nozzles 3, a gas nozzle 5 is arranged to form a core flame 6, which is correspondingly surrounded during operation of the gas burner 1 by the outer or enveloping flame 4.
  • This nuclear flame serves on the one hand in case of failure or disturbances of the envelope 4 to their reignition and on the other hand for supplementary power control.
  • the central gas nozzle 5 is supplied via a gas line 9 with gas, which is controlled by a controllable gas valve 10.
  • the envelope flame is adjusted according to the required power, via the gas valve 8.
  • the invention does not exclude that this gas quantity control via the gas valve 8 during operation is changeable, for example, in adaptation to the actual actual heat demand.
  • the core flame 6 is changeable via the gas valve 10 according to a predetermined program. In any case, however, due to its arrangement, the core flame can be modeled within the larger enveloping flame 4 enveloping it in such a way that an inwardly cooler flame is produced in the direction of flow, which in turn leads to internal recirculation of the exhaust gas forming in this core flame.
  • Fig. 2 is also very much simplified and in longitudinal section an oil burner 11 is shown, which operates in principle to solve the invention as the gas burner of Fig. 1.
  • About a number of circularly arranged ⁇ lzerstäubungsdüsen 12 is a required power bringing envelope 13th within which a core flame 15 formed via a central nozzle 14 is arranged.
  • the fuel supply to the nozzles 12 via oil lines 16, which are controlled by a solenoid valve 17, so that from an oil pump 18 from an oil tank 19 all fuel nozzles 12 are supplied simultaneously and under the same pressure with fuel oil.
  • To the central nozzle 14 performs an oil line 20 which is controllable via a control valve 21 and which is also supplied by the pump 18 with fuel oil.
  • the control valve 21 operates, as not shown here but the embodiment of FIG. 5 removable, with a ⁇ lzerstäuberdüsen 30 is generated, wherein what is shown overlapping in the drawing and not individually recognizable for the fuel, gas nozzles 29 and ⁇ lzerstäuberdüsen 30 side by side but also on a circle around the ⁇ lzerstäuberdüse 27 of the core flame 26 are arranged.
  • the lances 31 of the ⁇ lzerstäuberdüsen 30 thus do not pass through the gas supply pipes 32 of the gas nozzles 29 but next to it.
  • the gas supply pipes 32 branch off from a central gas distribution pipe 33, into which a gas supply pipe 34 opens.
  • this combination burner 25 can operate either as a pure oil burner, in which the envelope flame 28 is formed by spraying fuel oil through the ⁇ lzerstäuberdüsen 30 or the envelope flame 28 can be formed as a pure gas flame through the gas nozzles 29 gas supplied, and not least by the Combination of oil and gas for maximum simmer performance.
  • the core flame 26, however, is achieved only via the ⁇ lzerstäuberdüse 27, wherein the pressure, or the amount of the ⁇ lzerstäuberdüse 27 supplied fuel oil determines the variable size of the core flame 26.
  • 26 forms an open zone 36 on the exhaust side of this flame 26, which causes an internal recirculation of exhaust gas due to the flame forming this negative pressure in the center of the core flame 26 and thus on the one hand achieved a corresponding detoxification of the exhaust gases of NO x and on the other hand a certain cooling of the core flame 26, which benefits the entire firing efficiency.
  • Fig. 5 is a hydraulic circuit diagram for an oil burner is shown, as it is shown as an embodiment in Fig. 2 and Fig. 4 as a combination burner. Therefore, the same reference numerals are used for the corresponding articles shown in Fig. 5 as in Fig. 2.
  • the equipment shown in the hydraulic circuit diagram operates as follows.
  • the fuel oil is conveyed from the oil tank 19 via the oil pump 18 in a main line 37, wherein the adjusting pressure in the main line 37 via a pressure gauge 38 is measured and controlled by oil pressure switch for maximum pressure 39 and minimum pressure 40.
  • a main solenoid valve 41 is arranged in the main line 37 in order to interrupt the oil supply, if necessary.
  • the oil pump 18 has a suction line 42 and a return line 43.
  • a so-called combination burner 25 which is greatly reduced and shown in longitudinal section.
  • the combination can be done in a variety of ways.
  • the core flame 26 is generated by fuel oil and an oil atomizer nozzle 27, while the main flame or envelope flame 28 via a combination of gas nozzles 29 and controlled to control in the oil line 20 in front of the central nozzle 14 required for the core flame oil pressure.
  • the oil line 20 opens downstream of the oil quantity regulator 44 in the return line 45th
  • the oil line 16 branches off, which is controlled by the solenoid valve 17 and to the individual - here four - ⁇ lzerstäubungsdüsen 12 leads. If the solenoid valve 17 is opened, the hydraulically actuated needle shut-off valves 65, which are arranged at the entrance to the burner lances 31, open automatically under oil pressure.
  • the return lines of these enveloping enveloping flame causing ⁇ lzerstäubungsdüsen 12 open into a return line 48, in which an oil flow regulator 49 is arranged for adjusting the enveloping flame forming injecting amount of oil, wherein the adjustment via a servo motor 50 takes place.
  • the amount of oil to be injected is changeable according to a changing power requirement - but it is also conceivable that a certain power should be maintained and the amount of oil to be injected is adjusted.
  • the pressure in the oil line 48 is controlled via an oil pressure gauge 51, while downstream of the oil quantity regulator 49, a pressure switch 52 monitors the pressure in the return line 45 of both oil lines 20 and 48.
  • a pressure switch 52 monitors the pressure in the return line 45 of both oil lines 20 and 48.
  • two solenoid valves 53 are arranged, which are closed at burner standstill.
  • An electrolessly opening solenoid valve 66 ensures in the burner standstill for pressure equalization via the safety return 67 and can safely reduce pressure peaks in the closed hydraulic system when heated.
  • Fig. 6 is a hydraulic circuit diagram for an oil burner is shown, as shown as an embodiment in Fig. 3. Again, therefore, the same reference numerals are used for the corresponding objects shown in Fig. 6 as in Fig. 3, as far as it concerns objects taken from there.
  • fuel oil is pumped under pressure into a distributor 54 via an oil pump 18 from an oil tank 19 and a main line 37, in which main line 37 the main solenoid valve 41 for connecting and disconnecting the distributor block 54 is arranged.
  • the pressure in the main line 37, or the manifold block 54 can be checked via a pressure gauge 55.
  • the manifold block 54 is also connected to two pressure switches, namely a maximum pressure switch 56 and a minimum pressure switch 57. This ensures that the pressure in the manifold block 54 will be sufficient for those required for firing.
  • a pressure line 59 controlled via a solenoid valve 58 leads to a distributor block 60, from which the oil lines 16 leading to the oil atomizing nozzles 12 branch off.
  • the main or envelope flame is switched on or off via the solenoid valve 58.
  • the nozzles 12 also hydraulically actuated spring-loaded shut-off valves are arranged, open only under appropriate overpressure of the supplied fuel oil.

Landscapes

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

Abstract

L'invention concerne un procédé de combustion de combustibles liquides et/ou gazeux, ainsi qu'un brûleur à air soufflé destiné à la mise en oevre de ce procédé, selon lequel une flamme d'enveloppe apportant la capacité de combustion propre entoure une flamme centrale, au moins la flamme centrale étant modelable en termes de taille et de forme, de manière à ce qu'elle provoque une recirculation des gaz d'échappement interne dans la flamme d'enveloppe, notamment en raison d'une réalisation variable.
PCT/DE2007/000895 2006-05-19 2007-05-16 Modélisation de flamme Ceased WO2007134580A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006023851.6 2006-05-19
DE102006023851 2006-05-19

Publications (1)

Publication Number Publication Date
WO2007134580A1 true WO2007134580A1 (fr) 2007-11-29

Family

ID=38480607

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2007/000895 Ceased WO2007134580A1 (fr) 2006-05-19 2007-05-16 Modélisation de flamme

Country Status (1)

Country Link
WO (1) WO2007134580A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008104158A3 (fr) * 2007-02-27 2008-11-20 Ulrich Dreizler Flamme creuse
WO2009077408A3 (fr) * 2007-12-14 2009-10-29 Max Weishaupt Gmbh Dispositif de pulvérisation pour brûleur pour combustion de combustibles à préchauffer
DE102008037906A1 (de) * 2008-08-15 2010-02-25 Ulrich Dreizler Verfahren und Brenner zum Steuern eines Brennstoffluftgemisches einer mittleren bzw. großen Feuerungsanlage
CN103047647A (zh) * 2012-12-18 2013-04-17 中原特种车辆有限公司 燃气燃烧机
IT202000028400A1 (it) * 2020-11-25 2022-05-25 Baltur S P A Bruciatore e apparato industriale a ridotte emissioni
CN120748281A (zh) * 2025-08-26 2025-10-03 中国矿业大学 多模组t形动态耦合全域火焰包络燃烧模拟装置及方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085575A (en) * 1980-08-22 1982-04-28 Hamworthy Engineering Multi-fuel Burner
US4373896A (en) * 1978-10-31 1983-02-15 Zwick Eugene B Burner construction
US5700143A (en) * 1994-01-24 1997-12-23 Hauck Manufacturing Company Combination burner with primary and secondary fuel injection
EP0913631A2 (fr) * 1997-11-03 1999-05-06 Max Weishaupt GmbH Installation chauffée par l'huile aux émissions réduites d'oxyde d'azote (NOx)
EP1074790A1 (fr) * 1999-08-04 2001-02-07 Entreprise Generale De Chauffage Industriel Pillard Brûleur à recirculation de fumées
US20030148236A1 (en) * 2002-02-05 2003-08-07 Joshi Mahendra Ladharam Ultra low NOx burner for process heating
EP1378710A2 (fr) * 2002-07-05 2004-01-07 J. Eberspächer GmbH & Co. KG Régulateur de pression pour un brûleur à pulvérisation de chauffage de véhicule
DE10257704A1 (de) * 2002-12-11 2004-07-15 Alstom Technology Ltd Verfahren zur Verbrennung eines Brennstoffs
EP1645802A2 (fr) * 2004-10-11 2006-04-12 ALSTOM Technology Ltd Brûleur à prémélange
US20060101814A1 (en) * 2004-11-17 2006-05-18 Mitsubishi Heavy Industries, Ltd. Combustor of a gas turbine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373896A (en) * 1978-10-31 1983-02-15 Zwick Eugene B Burner construction
GB2085575A (en) * 1980-08-22 1982-04-28 Hamworthy Engineering Multi-fuel Burner
US5700143A (en) * 1994-01-24 1997-12-23 Hauck Manufacturing Company Combination burner with primary and secondary fuel injection
EP0913631A2 (fr) * 1997-11-03 1999-05-06 Max Weishaupt GmbH Installation chauffée par l'huile aux émissions réduites d'oxyde d'azote (NOx)
EP1074790A1 (fr) * 1999-08-04 2001-02-07 Entreprise Generale De Chauffage Industriel Pillard Brûleur à recirculation de fumées
US20030148236A1 (en) * 2002-02-05 2003-08-07 Joshi Mahendra Ladharam Ultra low NOx burner for process heating
EP1378710A2 (fr) * 2002-07-05 2004-01-07 J. Eberspächer GmbH & Co. KG Régulateur de pression pour un brûleur à pulvérisation de chauffage de véhicule
DE10257704A1 (de) * 2002-12-11 2004-07-15 Alstom Technology Ltd Verfahren zur Verbrennung eines Brennstoffs
EP1645802A2 (fr) * 2004-10-11 2006-04-12 ALSTOM Technology Ltd Brûleur à prémélange
US20060101814A1 (en) * 2004-11-17 2006-05-18 Mitsubishi Heavy Industries, Ltd. Combustor of a gas turbine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008104158A3 (fr) * 2007-02-27 2008-11-20 Ulrich Dreizler Flamme creuse
EP2126471B1 (fr) 2007-02-27 2016-02-10 Ulrich Dreizler Flamme creuse
WO2009077408A3 (fr) * 2007-12-14 2009-10-29 Max Weishaupt Gmbh Dispositif de pulvérisation pour brûleur pour combustion de combustibles à préchauffer
DE102008037906A1 (de) * 2008-08-15 2010-02-25 Ulrich Dreizler Verfahren und Brenner zum Steuern eines Brennstoffluftgemisches einer mittleren bzw. großen Feuerungsanlage
DE102008037906B4 (de) * 2008-08-15 2012-02-23 Ulrich Dreizler Verfahren und Brenner zum Steuern eines Brennstoffluftgemisches einer mittleren bzw. großen Feuerungsanlage
CN103047647A (zh) * 2012-12-18 2013-04-17 中原特种车辆有限公司 燃气燃烧机
IT202000028400A1 (it) * 2020-11-25 2022-05-25 Baltur S P A Bruciatore e apparato industriale a ridotte emissioni
CN120748281A (zh) * 2025-08-26 2025-10-03 中国矿业大学 多模组t形动态耦合全域火焰包络燃烧模拟装置及方法

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