EP1340018A1 - Verbrennungsverfahren und impulsstromgesteuerte brennstoff/sauerstofflanze - Google Patents
Verbrennungsverfahren und impulsstromgesteuerte brennstoff/sauerstofflanzeInfo
- Publication number
- EP1340018A1 EP1340018A1 EP01989520A EP01989520A EP1340018A1 EP 1340018 A1 EP1340018 A1 EP 1340018A1 EP 01989520 A EP01989520 A EP 01989520A EP 01989520 A EP01989520 A EP 01989520A EP 1340018 A1 EP1340018 A1 EP 1340018A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oxygen
- fuel
- mixing chamber
- combustion
- section
- 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
Links
- 239000001301 oxygen Substances 0.000 title claims abstract description 91
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 91
- 239000000446 fuel Substances 0.000 title claims abstract description 65
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 21
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 90
- 238000002156 mixing Methods 0.000 claims abstract description 43
- 239000007800 oxidant agent Substances 0.000 claims abstract description 22
- 239000000047 product Substances 0.000 claims abstract description 9
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002737 fuel gas Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 5
- 230000036284 oxygen consumption Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 239000003345 natural gas Substances 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
- C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
-
- 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
- F23C2205/00—Pulsating combustion
- F23C2205/20—Pulsating combustion with pulsating oxidant supply
-
- 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
- F23C2900/03005—Burners with an internal combustion chamber, e.g. for obtaining an increased heat release, a high speed jet flame or being used for starting the combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
- F27D2099/0043—Impulse burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
- F27D2099/0046—Heating elements or systems using burners with incomplete combustion, e.g. reducing atmosphere
- F27D2099/0048—Post- combustion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the invention relates to a method and a pulse flow controlled fuel / oxygen lance for the afterburning of products from incomplete combustion.
- a thermal nozzle combustion process is known from DE 693 14 903 T2.
- an oxidizing agent with an oxygen concentration of at least 30% at an initial speed of 15.2 to 61 m / s and separately from that is introduced into the thermal nozzle designed as a lance
- Oxidizing agent Fuel is introduced into an oxidizing agent feed channel at a speed of more than 61 m / s and burns up to about 20% of the oxygen with fuel therein.
- the combustion reaction products generated during the combustion of the fuel are mixed with the remaining oxygen of the oxidizing agent within the oxidizing agent supply channel and the oxygen stream heated up to 1650 ° C. is injected into the combustion zone at 152 to 610 m / s through an outlet nozzle.
- This known thermal nozzle combustion process is limited to oxygen supply systems with low source pressure. It is disadvantageous that the oxidant supply channel must be dimensioned very large due to the existing impulse flow ratios between natural gas and oxygen. This results in very high investment costs. In addition, the durability of the oxidant supply channel is low, which can result in high operating costs for maintenance. The availability of the furnace system is reduced and there is a loss of production.
- No. 5,823,762 describes a system for generating gas jets of different designs.
- nitrogen, argon or carbon dioxide as the main gas and propane, natural gas and other hydrocarbons as well as a gaseous fuel as well as an oxidizing agent containing oxygen or only consisting of oxygen are introduced into the nozzle in different flow rates / flow rates through channels arranged separately from one another, so that the one generated in the nozzle Gas jet flows out of the nozzle at the speed of sound. Due to the high impulse currents that are generated by the speed of sound of the gas jet, deflections and reflections can occur in certain phases of the production process, which affect the refractory delivery or the can destroy the water-cooled elements of the oven. This results in high operating costs for the repair of the furnace and additional production costs.
- the object of the invention is therefore to provide a generic
- Combustion process which allows a more economical and flexible process compared to the prior art by means of an oxidant feed that is flexibly adapted to the requirements. Furthermore, the invention is based on the object of specifying a generic fuel / oxygen lance which is suitable for such a method.
- the fuel / oxygen lance is fed a fossil fuel, for example natural gas, through the axial fuel channel via the fuel nozzle arranged with a concentric sleeve at 15-50 m / s into the mixing chamber.
- a fossil fuel for example natural gas
- the oxygen flows into the mixing chamber via the oxygen supply through an oxygen channel surrounding the axial fuel channel via the primary cross section connected to the oxygen channel and the mixing chamber.
- oxygen is introduced into the mixing chamber of the fuel / oxygen lance via the oxygen supply through the oxygen channel surrounding an axial fuel channel via a secondary cross section connected to the oxygen channel and the mixing chamber.
- the fuel in the mixing chamber is completely burned with the oxygen introduced through the primary cross section.
- the combustion reaction products generated during the combustion of the fuel heat the oxidizing agent introduced into the mixing chamber to at least 560 ° C.
- the stoichiometric amount of oxygen required for the combustion of the fuel which corresponds to 8-24 vol.% Of the total oxygen, is introduced into the primary cross section and as the oxidizing agent
- Oxygen to be introduced into the combustion zone is introduced into the mixing chamber through the secondary cross section at flow velocities of 70 to 200 m / s or 95 to 225 m / s.
- the secondary cross section has a value that is at least 5.5 times larger than the primary cross section.
- the oxidizing agent heated to at least 560 ° C. in the mixing chamber of the fuel / oxygen lance by means of the combustion reaction products is passed through the outlet nozzle out of the copper mixing chamber with a Speed of at least Mach 0.8 injected into the combustion zone.
- the length L of the mixing chamber corresponds to at least 2.5 times the diameter D of the outlet nozzle.
- the fuel / oxygen lance with water cooling is made of copper in the mixing chamber area, the fuel channel and the oxygen channel are made of stainless steel pipes.
- the thermal nozzle combustion process used for the afterburning of products from incomplete combustion ensures a substantial improvement in the heat transfer conditions in the combustion zone by means of the oxygen input into the combustion zone which is adapted to the respective process conditions by means of the fuel / oxygen lance according to the invention.
- a fuel for example natural gas
- a fuel nozzle 2 concentrically enclosed by a sleeve 5 at 20 to 80 m 3 / h and with a Velocity in the range of 15-50 m / s is introduced into a mixing chamber 8 equipped with an outlet nozzle 9 arranged at the end.
- the stoichiometric oxygen required to burn the fuel introduced into the mixing chamber 8 is fed to the mixing chamber 8 via an oxygen supply 3 through an oxygen channel 4 surrounding the axial fuel channel 1 via a primary cross section 6 connected to the oxygen channel 4 and the mixing chamber 8.
- the one in the Mixing chamber 8 as an oxidizing agent for the combustion zone is heated to at least 560 ° C. by the combustion reaction products formed during the combustion of the fuel with the oxygen supplied through the primary cross section 6 and flows through the front-side outlet nozzle 9 of the mixing chamber 8 at a speed of at least 0.8 Get into the combustion zone.
- the secondary cross section 7 is at least 5.5 times larger than the primary cross section 6.
- the length L of the copper mixing chamber 8 is at least 2.5 times larger than the diameter D of its outlet nozzle 9.
- the fuel / oxygen consisting of copper and stainless steel pipes
- the lance is further equipped with a cooling water tract 10 surrounding the mixing chamber 8 and the oxygen channel 4 with the primary and secondary cross sections 6, 7 and a cooling water supply and cooling water discharge 11, 12.
- the fuel / oxygen lance according to the invention was successfully tested in an electric arc furnace in a process for the afterburning of products from incomplete combustion.
- two fuel / oxygen lances were arranged in the area of the hot gas manifold in the furnace wall with an angle of inclination of 30 ° to the horizontal downwards and tangentially into the space between the electrode and the furnace wall, so that the main exhaust gas flow is recorded with a superimposed oxygen flow cover.
- the fuel / oxygen lances were operated as fuel / oxygen burners in the initial phase of melting down.
- the combustion output per device was specified in accordance with the scrap ratios between 1.0 and 1.5 MW.
- the combustion ratio was set between 0.9 and 2.0 depending on the oxygen content in the furnace.
- the natural gas supply was reduced and oxygen injection rates adjusted to match the oxygen content in the exhaust gas between 5 to 20 m 3 / min, this corresponds to a specific oxygen consumption of 2 to 8 m 3 / tfl.
- no oxygen was passed through the fuel / oxygen lances.
- approximately 30 m 3 of natural gas and 60 m 3 of oxygen per hour and fuel / oxygen lance were applied to the fuel / oxygen lances to keep the outlet nozzles 9 free.
- degrees of afterburning of at least 75% are achieved, with a saving potential of electrical energy per cubic meter of oxygen of at least 4.5 KWh being achieved.
- the kinetic energy of the oxygen jet can be adapted to the process sequence by varying the proportion of fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Charging Or Discharging (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10059440A DE10059440A1 (de) | 2000-11-30 | 2000-11-30 | Verbrennungsverfahren und impulsstromgesteuerte Brennstoff/Sauerstoff-Lanze |
DE10059440 | 2000-11-30 | ||
PCT/EP2001/013805 WO2002044617A1 (de) | 2000-11-30 | 2001-11-27 | Verbrennungsverfahren und impulsstromgesteuerte brennstoff/sauerstofflanze |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1340018A1 true EP1340018A1 (de) | 2003-09-03 |
Family
ID=7665232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01989520A Ceased EP1340018A1 (de) | 2000-11-30 | 2001-11-27 | Verbrennungsverfahren und impulsstromgesteuerte brennstoff/sauerstofflanze |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1340018A1 (de) |
CZ (1) | CZ20031468A3 (de) |
DE (1) | DE10059440A1 (de) |
PL (1) | PL366032A1 (de) |
WO (1) | WO2002044617A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10219488A1 (de) * | 2002-04-30 | 2003-11-13 | Messer Griesheim Gmbh | Vorrichtung und Verfahren zur Eindüsung von Sauerstoff und/oder Brennstoff |
DE102004037620C5 (de) * | 2004-08-02 | 2015-09-17 | Air Liquide Deutschland Gmbh | Brennstoff-Sauerstoff-Brenner mit variabler Flammenlänge |
DE102007031782A1 (de) | 2007-07-07 | 2009-01-15 | Messer Group Gmbh | Verfahren und Vorrichtung zum thermischen Behandeln von flüssigen oder gasförmigen Stoffen |
DE102014215794A1 (de) | 2014-08-08 | 2016-02-11 | Primetals Technologies Austria GmbH | Brenner-Lanzen-Einheit |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2499207A (en) * | 1945-12-22 | 1950-02-28 | John J Wolfersperger | Pressure-type burner and method of burning fuel |
US3216714A (en) * | 1963-02-04 | 1965-11-09 | Bot Brassert Oxygen Technik Ag | Heating and blowing device for metallurgical purposes |
FR1429675A (fr) * | 1964-03-31 | 1966-02-25 | Union Carbide Corp | Procédé de traitement de métaux ferreux |
AT310787B (de) * | 1968-12-06 | 1973-10-10 | Nippon Kokan Kk | Blaslanze |
US3730668A (en) * | 1971-03-03 | 1973-05-01 | Tokyo Gas Co Ltd | Combustion method of gas burners for suppressing the formation of nitrogen oxides and burner apparatus for practicing said method |
US4422391A (en) * | 1981-03-12 | 1983-12-27 | Kawasaki Jukogyo Kabushiki Kaisha | Method of combustion of pulverized coal by pulverized coal burner |
US5149261A (en) * | 1985-11-15 | 1992-09-22 | Nippon Sanso Kabushiki Kaisha | Oxygen heater and oxygen lance using oxygen heater |
US5513981A (en) * | 1991-11-22 | 1996-05-07 | Aichelin Gmbh | Burner with variable volume combination chamber |
US5266024A (en) | 1992-09-28 | 1993-11-30 | Praxair Technology, Inc. | Thermal nozzle combustion method |
DE4400831A1 (de) * | 1994-01-13 | 1995-07-20 | Messer Griesheim Gmbh | Verfahren zur Reduzierung von Schadgasemissionen bei der Verbrennung und Brenner dafür |
US5714113A (en) * | 1994-08-29 | 1998-02-03 | American Combustion, Inc. | Apparatus for electric steelmaking |
DE19521518C2 (de) | 1995-06-13 | 2000-05-04 | L Air Liquide Paris | Verfahren zur Verbesserung der Energiezufuhr in ein Schrotthaufwerk |
GB9519303D0 (en) * | 1995-09-21 | 1995-11-22 | Boc Group Plc | A burner |
US5823762A (en) | 1997-03-18 | 1998-10-20 | Praxair Technology, Inc. | Coherent gas jet |
DE19718878B4 (de) * | 1997-05-03 | 2005-06-30 | Lbe Feuerungstechnik Gmbh | Verfahren und Vorrichtung zur mehrstufigen Verbrennung von Brennstoff |
US6176894B1 (en) * | 1998-06-17 | 2001-01-23 | Praxair Technology, Inc. | Supersonic coherent gas jet for providing gas into a liquid |
-
2000
- 2000-11-30 DE DE10059440A patent/DE10059440A1/de not_active Ceased
-
2001
- 2001-11-27 CZ CZ20031468A patent/CZ20031468A3/cs unknown
- 2001-11-27 PL PL01366032A patent/PL366032A1/xx not_active Application Discontinuation
- 2001-11-27 WO PCT/EP2001/013805 patent/WO2002044617A1/de not_active Application Discontinuation
- 2001-11-27 EP EP01989520A patent/EP1340018A1/de not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO0244617A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002044617A1 (de) | 2002-06-06 |
DE10059440A1 (de) | 2002-06-13 |
CZ20031468A3 (cs) | 2003-12-17 |
PL366032A1 (en) | 2005-01-24 |
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