EP1629128A1 - Verfahren zur verringerung von schadstoffen in den abgasen eines brennerbefeuerten schmelzofens - Google Patents
Verfahren zur verringerung von schadstoffen in den abgasen eines brennerbefeuerten schmelzofensInfo
- Publication number
- EP1629128A1 EP1629128A1 EP04735572A EP04735572A EP1629128A1 EP 1629128 A1 EP1629128 A1 EP 1629128A1 EP 04735572 A EP04735572 A EP 04735572A EP 04735572 A EP04735572 A EP 04735572A EP 1629128 A1 EP1629128 A1 EP 1629128A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- melting
- furnace
- oxygen
- burner
- exhaust
- 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.)
- Withdrawn
Links
- 238000002844 melting Methods 0.000 title claims abstract description 46
- 230000008018 melting Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002912 waste gas Substances 0.000 title abstract 3
- 230000009467 reduction Effects 0.000 title description 4
- 239000000126 substance Substances 0.000 title description 2
- 239000007789 gas Substances 0.000 claims abstract description 55
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 30
- 239000001301 oxygen Substances 0.000 claims abstract description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 12
- 239000000567 combustion gas Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000289 melt material Substances 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims 1
- 238000010304 firing Methods 0.000 abstract 2
- 229910001882 dioxygen Inorganic materials 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 description 8
- 231100000719 pollutant Toxicity 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 238000010309 melting process Methods 0.000 description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
- C22B7/003—Dry processes only remelting, e.g. of chips, borings, turnings; apparatus used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/0084—Obtaining aluminium melting and handling molten aluminium
- C22B21/0092—Remelting scrap, skimmings or any secondary source aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
- F27B7/32—Arrangement of devices for charging
- F27B7/3205—Charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
- F27B7/34—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
- F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
-
- 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
- F27D19/00—Arrangements of controlling devices
-
- 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
- F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
-
- 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
- F27D19/00—Arrangements of controlling devices
- F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
- F27D2019/0012—Monitoring the composition of the atmosphere or of one of their components
- F27D2019/0015—Monitoring the composition of the exhaust gases or of one of its components
-
- 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 for reducing harmful compounds in the exhaust gases of a burner-fired melting furnace, in which melting material is introduced into the furnace and heat is applied to it with a combustion burner, the combustion gases, which are enriched with harmful compounds from the melting material, essentially flow from the combustion burner to the exhaust opening in the furnace, oxygen-rich gas being supplied to the gas mixture flowing in the furnace, the oxygen-rich gas being fed into the
- undesirable carbon compounds in particular hydrocarbons and carbon monoxide
- a limit value of 50 mg of organic carbon in the half-hourly average in the exhaust gas is currently to be taken into account.
- Said gases arise during the melting process of the material introduced with corresponding impurities, for example from lacquers or other plastic coatings of this material, these materials evaporating when heated, - mix with the combustion gases originating from the combustion burner and finally leave the system in this mixture through the exhaust duct.
- the feeding of oxygen-rich gas against the furnace gas flowing in the room above the melt causes the combustion and smoldering gases, i.e. water, CO ? , CO and hydrocarbons, provided that they are not already in the highest oxidation state, are further oxidized in the furnace, i.e. afterburned.
- the harmful compounds such as carbon monoxide or hydrocarbons
- the opposite orientation of the addition of the oxygen-rich gas with respect to the inflow of the combustion gases from the combustion burner causes mutually swirling currents to be introduced into the interior of the furnace and so only a small part of these flowing gases exit the furnace after a short time. This creates recirculation and eddy currents in the furnace interior, which prolong the residence time of the harmful compounds in the furnace at high temperatures and thus greatly favor the oxidation in question.
- the heat generated benefits the melting process, which can save valuable primary energy.
- the object of the present invention is to provide a • • Improvement of the circumstances, so a reduction in the compounds produced, harmful in the exhaust gases, the targeted melting processes to achieve the best possible and efficient way.
- Exhaust gas component which is determined in the flue gas duct of the melting furnace, is controlled.
- a fundamental advantage of the method according to the invention is that the additional oxygen supply to the furnace provides an oxygen supply option to the furnace that is independent of the combustion burner, and the control, which works with a setpoint value, ensures a good balance between the amount of oxygen present in the furnace and the amount of oxygen in the furnace Furnace introduced into the furnace is reached, a good coordination being achieved when the correct amount of oxygen required for the quantity of melting material introduced, which is necessary for a clean combustion of the exhaust gases, is available in the furnace.
- the oxygen supply can be carried out with an oxygen lance, which can optionally be designed to be cooled.
- an oxygen burner is used as the oxygen injector in a highly stoichiometric mode of operation, which results in further promotion of the desired oxidation or combustion of said pollutants, particularly in temperature-critical phases of the melting process - heating phase after charging.
- Preferred embodiments of the method according to the invention can be found in the subclaims.
- the use of the method according to the invention has proven particularly advantageous when melting metals in rotary drum furnaces, e.g. proven for aluminum.
- the combustion burner and the flue gas duct are arranged exactly opposite one another on the respective end faces of the melting drum, which results in particularly favorable flow conditions in these furnaces due to their geometry and a substantial reduction in the pollutants involved is achieved.
- the figure shows a rotary drum furnace 1 for melting aluminum scrap 2.
- a rotary drum 3 ' which encloses a melting chamber 3, is heated on one side with a combustion burner 4 arranged on the drum axis A, the burner flame generated being indicated by a line 5.
- the controller 11 compares a target value for the concentration of an exhaust gas component (e.g. of oxygen in the exhaust gas) with the concentration of this exhaust gas component measured by a measuring probe 9 and adjusts the rate of supply of melt material 2 so that the target value is obtained.
- an exhaust gas component e.g. of oxygen in the exhaust gas
- an exhaust gas duct 7 is connected to the exhaust opening 6 for the exhaust gases, an oxygen-natural gas burner 8 being arranged axially in this channel and in the direction of the melting chamber, the outlet nozzle of which is located approximately in the plane of the extraction opening 6 of the melting chamber 3.
- the arrangement of this oxygen injection burner 8 can vary, this burner reaching into or into the melting space almost by its own length the exhaust duct can be arranged withdrawn. In any case it is.
- Oxygen burner 8 is directed towards the combustion burner 4 and thus introduces a gas pulse which counteracts the movement impulse of the combustion gases originating from the burner 4 and thus produces gas turbulence up to gas recirculation, as indicated by the arrows in the figure.
- a displaceable accommodation of the oxygen burner 8 in the exhaust gas duct 7 is particularly favorable, as a result of which an optimal positioning of the burner in the exhaust gas duct 7 with respect to the melting chamber can be found with regard to the exhaust gas values.
- the measuring probe 9, which is likewise accommodated in the exhaust gas duct 7, is not impaired by this.
- the procedure according to the invention is a comparatively simple to implement and has no other disadvantages, with which the values of harmful compounds in the exhaust gas in said melting processes can be significantly reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003125556 DE10325556A1 (de) | 2003-06-05 | 2003-06-05 | Verfahren zur Verringerung von Schadstoffen in den Abgasen eines brennerbefeuerten Schmelzofens |
| PCT/EP2004/005907 WO2004108974A1 (de) | 2003-06-05 | 2004-06-01 | Verfahren zur verringerung von schadstoffen in den abgasen eines brennerbefeuerten schmelzofens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1629128A1 true EP1629128A1 (de) | 2006-03-01 |
Family
ID=33482596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04735572A Withdrawn EP1629128A1 (de) | 2003-06-05 | 2004-06-01 | Verfahren zur verringerung von schadstoffen in den abgasen eines brennerbefeuerten schmelzofens |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1629128A1 (de) |
| BR (1) | BRPI0410981A (de) |
| DE (1) | DE10325556A1 (de) |
| WO (1) | WO2004108974A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010029648A1 (de) | 2010-06-02 | 2011-04-07 | Kutzner, Dieter, Dipl.-Ing. | Verfahren zum Schmelzen von Metallen oder Glas oder zur Wärmebehandlung von Metallen |
| PL2664884T3 (pl) | 2012-05-18 | 2020-02-28 | Air Products And Chemicals, Inc. | Sposób i urządzenie do podgrzewania metali |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU574401A1 (ru) * | 1976-01-28 | 1977-09-30 | Московский Институт Химического Машиностроения | Способ стабилизации уровн стекломассы в выработочной части печи |
| DD133355A1 (de) * | 1977-09-26 | 1978-12-27 | Lothar Grunert | Betrieb von kupoloefen fuer mineralschmelzen nach der abgaszusammensetzung |
| DD255723A1 (de) * | 1986-11-05 | 1988-04-13 | Glasindustrie Waermetech Inst | Verfahren zum kontinuierlichen einlegen von gut in einen elektrisch beheizten ofen |
| DE4026414A1 (de) * | 1990-08-21 | 1992-02-27 | Linde Ag | Verfahren zur verringerung von schadstoffen in den abgasen brennerbefeuerter schmelzoefen |
| EP0756014B2 (de) * | 1995-07-27 | 2008-02-20 | Air Products And Chemicals, Inc. | Verfahren zum Schmelzen von Aluminium, Schrott und Aluminiumrückständen |
| DE10114179A1 (de) * | 2001-03-23 | 2002-09-26 | Linde Ag | Vorrichtung zum Einschmelzen von Aluminiumschrott |
-
2003
- 2003-06-05 DE DE2003125556 patent/DE10325556A1/de not_active Withdrawn
-
2004
- 2004-06-01 BR BRPI0410981 patent/BRPI0410981A/pt not_active IP Right Cessation
- 2004-06-01 WO PCT/EP2004/005907 patent/WO2004108974A1/de not_active Ceased
- 2004-06-01 EP EP04735572A patent/EP1629128A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004108974A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0410981A (pt) | 2006-07-04 |
| WO2004108974A1 (de) | 2004-12-16 |
| DE10325556A1 (de) | 2004-12-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20051115 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
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| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20070201 |
|
| 17Q | First examination report despatched |
Effective date: 20070201 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LINDE AKTIENGESELLSCHAFT |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LINDE AG |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20090813 |