EP0237069B1 - Vorrichtung zur Luftzufuhr an eine Kesselbrennkammer, welche normalerweise mit Erdgas betrieben wird, während Hilfsbetrieb mit Öl - Google Patents

Vorrichtung zur Luftzufuhr an eine Kesselbrennkammer, welche normalerweise mit Erdgas betrieben wird, während Hilfsbetrieb mit Öl Download PDF

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Publication number
EP0237069B1
EP0237069B1 EP87103596A EP87103596A EP0237069B1 EP 0237069 B1 EP0237069 B1 EP 0237069B1 EP 87103596 A EP87103596 A EP 87103596A EP 87103596 A EP87103596 A EP 87103596A EP 0237069 B1 EP0237069 B1 EP 0237069B1
Authority
EP
European Patent Office
Prior art keywords
burners
oil
natural gas
blowers
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.)
Expired - Lifetime
Application number
EP87103596A
Other languages
English (en)
French (fr)
Other versions
EP0237069A1 (de
Inventor
Maurice Kanter
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.)
Stein Industrie SA
Original Assignee
Stein Industrie SA
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 Stein Industrie SA filed Critical Stein Industrie SA
Priority to AT87103596T priority Critical patent/ATE50354T1/de
Publication of EP0237069A1 publication Critical patent/EP0237069A1/de
Application granted granted Critical
Publication of EP0237069B1 publication Critical patent/EP0237069B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/02—Applications of combustion-control devices, e.g. tangential-firing burners, tilting burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • 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 
    • F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
    • F23C1/08—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air liquid and gaseous fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L5/00—Blast-producing apparatus before the fire
    • F23L5/02—Arrangements of fans or blowers

Definitions

  • the present invention relates to a device for supplying the burners of a boiler hearth operating on natural gas with fans for sending air to the burners for temporary operation with an emergency fuel consisting of fuel oil.
  • Document FR-A 1 188 972 describes a boiler comprising main gas burners, oil or pulverized coal burners and auxiliary gas burners, for isolated or simultaneous heating with oil or coal and / or gas. It compensates for the excess combustion gas during heating with gas alone using a heat exchanger for heating the combustible gas with superheated steam.
  • Document DE-B 1 230 512 relates to a burner with two different gas or oil supplies, with each of which is associated with a supply of oxidizing gas. Each of the power supplies can operate on its own.
  • the object of the present invention is to provide a supply device for temporary fuel oil operation which requires neither an oversizing of the main air fans nor the installation of a smoke recycling circuit, and reduces investment and the additional energy consumption corresponding to the possibility of operating in emergency mode.
  • the main fans are preferably chosen to have a maximum flow rate equal to that necessary for operation at maximum load with natural gas, and the maximum flow rate for the auxiliary fan corresponds to the additional air required for operation at maximum load with oil.
  • the discharge of the auxiliary fan is advantageously connected to one and the other of those of the main fans, so as to reduce the drop in heating power in the event of a failure of one of the latter during gas operation. natural.
  • the tilting burners allow the flame temperature zones to be moved upwards compared to those which would normally be established in oil operation with fixed burners, which makes it possible to adjust the temperature of the combustion gases at the level of the superheaters and reheaters. of the boiler.
  • the air discharge ducts of the additional fan are ordinary non-insulated ducts, instead of the insulated ducts which would be required by the recycling of the fumes.
  • the furnace of the boiler 1 is supplied in its corners with fuel and combustion air by series of superimposed burners, shown in arrows 2, 3, 4, 5.
  • the combustion air is discharged by centrifugal fans 6, 7 towards the exchangers - recuperators 8, 9, where it heats up in contact with a material previously heated by the fumes resulting from combustion in the hearth.
  • the heated air then travels through the insulated ducts 10 and 12 on the one hand, 11 and 13 on the other hand, to the series of burners 2 and 3 on the one hand, 4 and 5 on the other hand, where it ensures during normal operation, the combustion of natural gas, arriving via pipes not shown.
  • These burners are tiltable, so as to compensate by tilting upwards part of the decrease in the temperature of the combustion gases at the level of the superheaters and reheaters of the boiler resulting from the substitution of fuel oil for natural gas.
  • the fumes evacuated from the hearth and from the overheating and reheating exchangers are sent back through the conduits 14 and 15 to the exchanger-recuperators 8 and 9, where they give up some of their sensible heat, then pass through the conduits 16 and 17 to the fireplace 18.
  • the auxiliary centrifugal fan 19 is put into operation. This blows in the additional cold air necessary for the combustion of the oil, on the one hand by the conduit 20 in the conduit 12, on the other hand by the conduit 21 in the conduit 13.
  • the main fans 6 and 7 are dimensioned to each supply 50% of the flow corresponding to the nominal operation of the boiler at full power.
  • the auxiliary fan is dimensioned to provide, for example, approximately 20% of the flow rate corresponding to the nominal operation. In the event of a failure of one of the main fans during normal natural gas operation, it is thus possible to ensure operation at 70% of the maximum power. In an installation designed to provide emergency operation by recycling smoke, it would have been necessary to oversize each of the main fans, which corresponded to allowing each of them to ensure approximately 60% of the flow corresponding to nominal operation, and the power reached in the event of a failure of one of them would therefore have been only 60% of the nominal power.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Supply (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Regulation And Control Of Combustion (AREA)

Claims (4)

1. Speisevorrichtung für die Brenner (2, 3, 4, 5) eines mit Erdgas arbeitenden Heizkessels (1), mit Ventilatoren (6, 7) zur Versorgung der Brenner mit Luft während des zeitweiligen Betriebs mit einem Hilfsbrennstoff, der aus Heizöl besteht, wobei die Vorrichtung Wärmetauscher-Rekuperatoren (8, 9) aufweist, welche die von den Ventilatoren (6, 7) geförderte Luft aufwärmen, während gleichzeitig die aus der Brennkammer (1) abgezogenen Rauchgase durch Rohrleitungen (14, 15) zu den Wärmetauschern (8, 9) zurückgeführt werden, wo sie einen Teil ihrer nutzbaren Wärme abgeben und dann durch Rohrleitungen (16, 17) zum Schornstein (18) gelangen, und wobei die Vorrichtung weiter einen Zusatzventilator (19) besitzt, der für den Heizölbetrieb eine Zusatzmenge an Luft zur Brennkammer fördert.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Brenner schwenkbar sind.
3. Vorrichtung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß der maximale Durchsatz der Hauptventilatoren (6, 7) demjenigen für Erdgasbetrieb bei Vollast entspricht, und daß der maximale Durchsatz des Zusatzventilators (19) der für den Heizölbetrieb bei Vollast erforderlichen zusätzlichen Luftmenge entspricht.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Förderaustritt des Zusatzventilators (19) über Leitungen (20, 21) mit beiden Hauptventilatoren (6, 7) verbunden ist, derart, daß der Leistungsabfall bei Ausfall eines der Ventilatoren während des Erdgasbetriebes verringert wird.
EP87103596A 1986-03-14 1987-03-12 Vorrichtung zur Luftzufuhr an eine Kesselbrennkammer, welche normalerweise mit Erdgas betrieben wird, während Hilfsbetrieb mit Öl Expired - Lifetime EP0237069B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87103596T ATE50354T1 (de) 1986-03-14 1987-03-12 Vorrichtung zur luftzufuhr an eine kesselbrennkammer, welche normalerweise mit erdgas betrieben wird, waehrend hilfsbetrieb mit oel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8603693 1986-03-14
FR8603693A FR2595790B1 (fr) 1986-03-14 1986-03-14 Dispositif d'alimentation en air d'un foyer de chaudiere fonctionnant normalement au gaz naturel pour marche de secours au mazout

Publications (2)

Publication Number Publication Date
EP0237069A1 EP0237069A1 (de) 1987-09-16
EP0237069B1 true EP0237069B1 (de) 1990-02-07

Family

ID=9333147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87103596A Expired - Lifetime EP0237069B1 (de) 1986-03-14 1987-03-12 Vorrichtung zur Luftzufuhr an eine Kesselbrennkammer, welche normalerweise mit Erdgas betrieben wird, während Hilfsbetrieb mit Öl

Country Status (5)

Country Link
US (1) US4725224A (de)
EP (1) EP0237069B1 (de)
AT (1) ATE50354T1 (de)
DE (1) DE3761707D1 (de)
FR (1) FR2595790B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8286594B2 (en) * 2008-10-16 2012-10-16 Lochinvar, Llc Gas fired modulating water heating appliance with dual combustion air premix blowers
US8517720B2 (en) * 2008-10-16 2013-08-27 Lochinvar, Llc Integrated dual chamber burner
US9097436B1 (en) 2010-12-27 2015-08-04 Lochinvar, Llc Integrated dual chamber burner with remote communicating flame strip
CN102022749A (zh) * 2010-12-31 2011-04-20 广东理文造纸有限公司 一种锅炉风机系统
US9464805B2 (en) 2013-01-16 2016-10-11 Lochinvar, Llc Modulating burner

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1099470A (fr) * 1953-01-16 1955-09-06 Combustion Eng Perfectionnements apportés aux générateurs de vapeur
US2840053A (en) * 1953-01-16 1958-06-24 Combustion Eng Combustion zone control
GB821423A (en) * 1954-09-09 1959-10-07 Thompson John Water Tube Boilers Ltd Improvements relating to steam generators
FR1188972A (fr) * 1956-12-24 1959-09-28 Walther & Cie Ag Installation de chaudière permettant, au choix, la chauffe au gaz combustible ou au combustible pulvérulent ou à l'huile combustible
GB852965A (en) * 1956-12-24 1960-11-02 Walther & Cie Ag Improvements in steam generator plants
DE1241929B (de) * 1961-03-30 1967-06-08 Steinmueller Gmbh L & C Feuerungsanlage fuer Dampferzeuger mit zwei uebereinanderliegenden, mit OEl und/oder Gas befeuerten Verbrennungskammern
DE1230512B (de) * 1964-03-09 1966-12-15 Hans Maile Fabrik Fuer Gasbren Mehrstufiger Gas- oder OElbrenner
US3269368A (en) * 1964-04-14 1966-08-30 Nat Steel Corp Superheater
FR1430692A (fr) * 1965-04-13 1966-03-04 Nat Steel Corp Surchauffeur
US3789804A (en) * 1972-12-14 1974-02-05 Sulzer Ag Steam power plant with a flame-heated steam generator and a group of gas turbines
US4003692A (en) * 1975-08-06 1977-01-18 Eclipse, Inc. High velocity burner
US3989443A (en) * 1975-10-10 1976-11-02 California Portland Cement Company Multiple fuel burner and usage in rotary kilns

Also Published As

Publication number Publication date
FR2595790A1 (fr) 1987-09-18
FR2595790B1 (fr) 1989-06-09
DE3761707D1 (de) 1990-03-15
EP0237069A1 (de) 1987-09-16
ATE50354T1 (de) 1990-02-15
US4725224A (en) 1988-02-16

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