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 PDFInfo
- 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
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000003345 natural gas Substances 0.000 title claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 title description 6
- 239000000295 fuel oil Substances 0.000 claims abstract description 12
- 239000000446 fuel Substances 0.000 claims abstract description 5
- 239000003546 flue gas Substances 0.000 claims abstract 3
- 230000000153 supplemental effect Effects 0.000 claims abstract 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000004064 recycling Methods 0.000 abstract description 7
- 238000010304 firing Methods 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Images
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)
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)
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)
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 |
-
1986
- 1986-03-14 FR FR8603693A patent/FR2595790B1/fr not_active Expired
-
1987
- 1987-03-11 US US07/024,537 patent/US4725224A/en not_active Expired - Fee Related
- 1987-03-12 DE DE8787103596T patent/DE3761707D1/de not_active Expired - Fee Related
- 1987-03-12 AT AT87103596T patent/ATE50354T1/de not_active IP Right Cessation
- 1987-03-12 EP EP87103596A patent/EP0237069B1/de not_active Expired - Lifetime
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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