EP0337112B1 - Process for the diminution of the nox content of flue gases when heating coke ovens - Google Patents
Process for the diminution of the nox content of flue gases when heating coke ovens Download PDFInfo
- Publication number
- EP0337112B1 EP0337112B1 EP89104099A EP89104099A EP0337112B1 EP 0337112 B1 EP0337112 B1 EP 0337112B1 EP 89104099 A EP89104099 A EP 89104099A EP 89104099 A EP89104099 A EP 89104099A EP 0337112 B1 EP0337112 B1 EP 0337112B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating
- gas
- stages
- flue gas
- flow
- 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.)
- Revoked
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B21/00—Heating of coke ovens with combustible gases
- C10B21/20—Methods of heating ovens of the chamber oven type
- C10B21/22—Methods of heating ovens of the chamber oven type by introducing the heating gas and air at various levels
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B21/00—Heating of coke ovens with combustible gases
- C10B21/10—Regulating and controlling the combustion
- C10B21/18—Recirculating the flue gases
Definitions
- the invention relates to a method for reducing the NO x content in the flue gas when heating coking ovens with paired heating trains, several combustion stages lying at different heights and a flue gas recirculation at the level of the heating flue (circulating flow), the circulating flow rate, that is the volume flow of the recirculated flue gas divided by the flue gas volume flow without recirculated flue gas, between 20% and 50%.
- the known measures for reducing the formation of NO x aim to reduce the flame temperature by flue gas recirculation or to reduce the oxygen and nitrogen concentrations by partial combustion.
- the principle of flue gas recirculation is implemented in coking furnaces, in particular in the form of the Koppers cycle furnace.
- the air and heating gas flow are mixed with flue gas, which primarily results in a significant reduction in the NO x production rates by reducing the maximum flame temperature, but also by reducing the O2 and N2 concentration.
- the NO x reduction principle of partial combustion is used in coking ovens in the form of step heating.
- DE-OS 3443976 This relates mainly focus on high-gas ovens with two combustion stages and flue gas recirculation as well as composite coking ovens with air and gas steps and flue gas recirculation.
- the step ratio for a number of steps greater than or equal to 2 defined as the air volume flow of the lower steps divided by the total air volume flow, between 80 / I% (80% divided by number of steps I) and 140 / I% (140% divided by the number of stages I) is set, the upper combustion stages between 45% - 10% ⁇ (I - 1) of the heating draft (minimum however at 15%) and 45% + 10% (I - 1) the heating draft height (maximum, however, at 85%).
- a stage ratio between 26.7% and 46.7% is calculated, i.e. the lower stage receives between 26.7% and 46.7% of the total air volume flow.
- the remaining amount of air is appropriately distributed approximately evenly over the two upper stages.
- the upper combustion stages should be arranged between 25% and 65% of the heating draft height.
- Partial combustion takes place above level 12 in the flamed heating train.
- the path of the flue gases leads from the flamed heating cable 2 via the reversal point 13 (part via the differential channel 14) into the non-flaming heating cable 2a and via the nozzles and channels 4a, 3a, 6a, 5a, 10a, 9a into the exhaust gas regenerators (not shown) .
- FIGS. 1 and 2 the direction of flow of the media is indicated by arrows for both low-gas and high-gas heating. In the case of lean gas operation, however, no heavy gas flows, while in the case of heavy gas operation the lean gas ducts carry combustion air.
- the lateral limitation of a pair of heating cables 1 takes place through the rotor walls 15 and the connector walls 16 penetrated by the channel 9.
- the heating cable pair 1 is divided into heating cables 2 and 2a by the binder wall 17 which is penetrated by the reversal point 13 and the circuit opening 11.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Treating Waste Gases (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Verringerung des NOx-Gehaltes im Rauchgas bei der Beheizung von Verkokungsöfen mit paarweise zusammenarbeitenden Heizzügen, mehreren in unterschiedlichen Höhen liegenden Verbrennungsstufen sowie einer Rauchgasrückführung in Höhe der Heizzugsohle (Kreisstrom), wobei die Kreisstromrate, das ist der Volumenstrom des rückgeführten Rauchgases dividiert durch den Rauchgasvolumenstrom ohne rückgeführtes Rauchgas, zwischen 20% und 50% eingestellt wird.The invention relates to a method for reducing the NO x content in the flue gas when heating coking ovens with paired heating trains, several combustion stages lying at different heights and a flue gas recirculation at the level of the heating flue (circulating flow), the circulating flow rate, that is the volume flow of the recirculated flue gas divided by the flue gas volume flow without recirculated flue gas, between 20% and 50%.
Es ist bekannt, daß es sich bei den in Verkokungsöfen gebildeten Stickoxiden in erster Linie um sogenanntes thermisches NOx handelt, dessen Bildungsraten nahezu linear vom Produkt der Sauerstoff- und Stickstoffkonzentrationen in der Flamme sowie exponentiell von der Flammentemperatur abhängen.It is known that the nitrogen oxides formed in coking ovens are primarily so-called thermal NO x , the formation rates of which depend almost linearly on the product of the oxygen and nitrogen concentrations in the flame and exponentially on the flame temperature.
Die bekannten Maßnahmen zur Reduktion der NOx-Bildung zielen auf eine Verminderung der Flammentemperatur durch Rauchgasrückführung oder auf eine Verringerung der Sauerstoff- und Stickstoffkonzentrationen durch partielle Verbrennung.The known measures for reducing the formation of NO x aim to reduce the flame temperature by flue gas recirculation or to reduce the oxygen and nitrogen concentrations by partial combustion.
Das Prinzip der Rauchgasrückführung ist bei Verkokungsöfen insbesondere in Form des Koppers-Kreisstrom-Ofens verwirklicht. Hierbei wird durch ein oder zwei öffnungen in jeder zweiten Binderwand in Höhe der Heizzugsohle dem Luft- und Heizgasstrom Rauchgas zugemischt, das in erster Linie durch Verringerung der maximalen Flammentemperatur, aber auch durch Reduktion der O₂- und N₂-Konzentration eine deutliche Verringerung der NOx-Produktionsraten bewirkt.The principle of flue gas recirculation is implemented in coking furnaces, in particular in the form of the Koppers cycle furnace. Here, through one or two openings in every second truss wall at the level of the heating element the air and heating gas flow are mixed with flue gas, which primarily results in a significant reduction in the NO x production rates by reducing the maximum flame temperature, but also by reducing the O₂ and N₂ concentration.
Das NOx-Reduktionsprinzip der partiellen Verbrennung wird in Verkokungsöfen in Form einer Stufenbeheizung genutzt.The NO x reduction principle of partial combustion is used in coking ovens in the form of step heating.
Mit dem Ziel, die NOx-Emission in Verkokungsöfen noch weiter zu senken, sind theoretische und experimentelle Untersuchungen durchgeführt worden. Als wesentliche Erkenntnis dieser Studien bleibt festzuhalten, daß eine Kombination der NOx-Reduktionsprinzipien, Rauchgasrückführung (Kreisstrombeheizung) und partielle Verbrennung (Stufenbeheizung), zu einer weiterführenden Verringerung der NOx-Produktion führen kann.To reduce even further in coke ovens with the aim of NOx emissions, theoretical and experimental investigations have been carried out. The main finding of these studies is that a combination of the NO x reduction principles, flue gas recirculation (circuit heating) and partial combustion (stage heating) can lead to a further reduction in NO x production.
Grundsätzlich ist die Kombination von Stufenbeheizung und Kreisstrombeheizung bei Verkokungsöfen bekannt. Die genannten Untersuchungen zeigen aber, daß eine willkürliche Kombination von Kreisstrombeheizung und Stufenbeheizung nicht zwangsläufig zu einer nennenswerten NO-x-Reduktion führt. Nur bei einer optimalen Kombination von Stufenbeheizung, Kreisstrombeheizung und Anordnung der zweiten Verbrennungsstufe ist eine maximale NOx-Verringerung erzielbar.Basically, the combination of step heating and circuit heating in coking ovens is known. However, the studies mentioned show that an arbitrary combination of circulating current heating and step heating does not necessarily lead to a significant NO x reduction. A maximum NO x reduction can only be achieved with an optimal combination of stage heating, circuit heating and arrangement of the second combustion stage.
Die aus diesen Untersuchungen gewonnenen Erkenntnisse sind in der DE-OS 3443976 zusammengefaßt. Diese bezieht sich im wesentlichen auf Starkgasöfen mit zwei Verbrennungsstufen und Rauchgasrückführung sowie Verbundverkokungsöfen mit Luft- und Gasstufung und Rauchgasrückführung.The knowledge gained from these investigations is summarized in DE-OS 3443976. This relates mainly focus on high-gas ovens with two combustion stages and flue gas recirculation as well as composite coking ovens with air and gas steps and flue gas recirculation.
Weiterführende Untersuchungen haben aber gezeigt, daß auch durch Anordnung von mehr als zwei Stufen für Starkgas- und Schwachgas- bzw. Mischgasbetrieb sowie durch reine Luftstufung mit zwei oder mehr als zwei Stufen für den Schwach- bzw. Mischgasbetrieb in Kombination mit der Rauchgasrückführung deutliche Verminderungen der NOx-Emissionen erzielt werden können.Further investigations have shown, however, that by arranging more than two stages for strong gas and lean gas or mixed gas operation as well as by pure air grading with two or more than two stages for lean or mixed gas operation in combination with the flue gas recirculation, significant reductions in NO x emissions can be achieved.
Ausgehend von den Ergbenissen dieser Untersuchungen, wird erfindungsgemäß vorgeschlagen, daß bei alleiniger Luftstufung das Stufenverhältnis für eine Stufenanzahl größer/gleich 2, definiert als Luftvolumenstrom der unteren Sufe dividiert durch den gesamten Luftvolumenstrom, zwischen 80/I% (80% dividiert durch Stufenanzahl I) und 140/I% (140% dividiert durch Stufenanzahl I) eingestellt wird, wobei die oberen Verbrennungsstufen zwischen 45% - 10% × (I - 1) der Heizzughöhe (minimal jedoch bei 15%) und 45% + 10% (I - 1) der Heizzughöhe (maximal jedoch bei 85%) angeordnet werden.On the basis of the results of these investigations, it is proposed according to the invention that, with only air grading, the step ratio for a number of steps greater than or equal to 2, defined as the air volume flow of the lower steps divided by the total air volume flow, between 80 / I% (80% divided by number of steps I) and 140 / I% (140% divided by the number of stages I) is set, the upper combustion stages between 45% - 10% × (I - 1) of the heating draft (minimum however at 15%) and 45% + 10% (I - 1) the heating draft height (maximum, however, at 85%).
Hierbei errechnet sich beispielsweise bei einer Stufenanzahl 3 ein Stufenverhältnis zwischen 26,7% und 46,7%, d.h. der unteren Stufe werden zwischen 26,7% und 46,7% des gesamten Luftvolumenstromes zugeführt. Die restliche Luftmenge wird man zweckmäßig annähernd gleichmäßig auf die beiden oberen Stufen verteilen.Here, for example, with a number of
Für die Höhenanordnung der Verbrennungsstufen errechnet sich beispielsweise bei einer Stufenanzahl 3, daß die oberen Verbrennungsstufen zwischen 25% und 65% der Heizzughöhe angeordnet werden sollen.For the height arrangement of the combustion stages, for example with a number of
In den Zeichnungen sind Ausführungsformen von zur Durchführung des erfindungsgemäßen Verfahrens geeigneten Verkokungsöfen enthalten. Dabei sind die Zufuhr der Verbrennungsmedien von den hier nicht eingezeichneten Regeneratoren zu den Heizzügen, die Schaltung der Regeneratoren, der Heizzüge bzw. Heizzugpaare sowohl für Verbundöfen, d.h. Verkokungsöfen mit wahlweiser Starkgas- oder Schwachgasbeheizung, als auch für Starkgasöfen dargestellt. In den Zeichnungen ist die Richtung des Medienverlaufs (Luft, Schwachgas, Starkgas, Abgas) während einer Heizperiode durch Pfeile gekennzeichnet. Da es sich hier um Regenerativöfen handelt, wechselt der Verlauf der Medien für die zweite Periode.
- Fig. 1
- zeigt zwei nebeneinanderliegende Heizzugpaare eines Verbundofens im vertikalen Längsschnitt A-A nach Fig. 2,
- Fig. 2
- den horizontalen Querschnitt B-B dieser zwei Heizzugpaare nach Fig. 1,
- Fig. 3
- zwei nebeneinanderliegende Heizzugpaare eines Starkgasofens im vertikalen Längsschnitt C-C nach Fig. 4 und
- Fig. 4
- den horizontalen Querschnitt D-D der zwei Heizzugpaare nach Fig. 3.
The drawings contain embodiments of coking ovens suitable for carrying out the method according to the invention. The supply of the combustion media from the regenerators (not shown here) to the heating trains, the switching of the regenerators, the heating trains or pairs of heating trains are shown both for composite furnaces, i.e. coking furnaces with optional strong gas or weak gas heating, and for strong gas furnaces. In the drawings, the direction of the media flow (air, lean gas, high gas, exhaust gas) is indicated by arrows during a heating period. Because it if these are regenerative stoves, the course of the media changes for the second period.
- Fig. 1
- 2 shows two adjacent heating train pairs of a composite furnace in the vertical longitudinal section AA according to FIG. 2,
- Fig. 2
- 2 shows the horizontal cross section BB of these two pairs of heating trains according to FIG. 1,
- Fig. 3
- two adjacent heating train pairs of a gas burner in a vertical longitudinal section CC according to FIGS. 4 and
- Fig. 4
- 3 shows the horizontal cross section DD of the two pairs of heating trains according to FIG. 3.
In den Zeichnungen bedeuten:
- 1
- Heizzugpaar
- 2
- Heizzug (beflammt)
- 2a
- Heizzug (nicht beflammt)
- 3
- Primärluftkanal
- 3a
- Primärluftkanal (Abgas führend)
- 4
- Regulierung zu 3
- 4a
- Regulierung zu 3a (Abgas führend)
- 5
- Schwachgaskanal
- 5a
- Schwachgaskanal (Abgas führend)
- 6
- Regulierung zu 5
- 6a
- Regulierung zu 5a (Abgas führend)
- 7
- Starkgaskanal
- 8
- Starkgasdüse
- 9
- Sekundärluft
- 9a
- Sekundärluft (Abgas führend)
- 10
- Regelbare Austritte zu 9 ) Regelorgane
- 10a
Regelbare Austritte zu 9a ) nicht- (Abgas führend) ) dargestellt
- 11
- Kreisstromöffnungen
- 11a
- Regulierrolle für Kreisstromöffnungen
- 12
- Höhe Brennerebene bis zur Sekundärluftzuführung
- 13
- Umkehrstelle
- 14
- Differentialkanal
- 15
- Läuferwände
- 16
- Binderwände oberhalb Sekundärluftstelle
- 17
- Binderwände mit Umkehrstelle und Kreisstrom
In the drawings:
- 1
- Heating cable pair
- 2nd
- Heating flames
- 2a
- Heating flue (not flamed)
- 3rd
- Primary air duct
- 3a
- Primary air duct (exhaust gas leading)
- 4th
- Regulation to 3
- 4a
- Regulation to 3a (exhaust gas leading)
- 5
- Weak gas channel
- 5a
- Weak gas duct (exhaust gas leading)
- 6
- Regulation to 5
- 6a
- Regulation to 5a (exhaust gas leading)
- 7
- Heavy gas duct
- 8th
- Power gas nozzle
- 9
- Secondary air
- 9a
- Secondary air (exhaust gas leading)
- 10th
- Adjustable exits to 9) regulatory bodies
- 10a
- Not controllable exits to 9a)
- (Leading exhaust gas))
- 11
- Circular flow openings
- 11a
- Regulating roller for circular flow openings
- 12
- Height of burner level up to the secondary air supply
- 13
- Reversal point
- 14
- Differential channel
- 15
- Runner walls
- 16
- Truss walls above the secondary air point
- 17th
- Truss walls with reversal point and circulating current
Die strömenden Medien werden wie folgt den beflammten Heizzügen 2 zugeführt:
- ― Primärluft vom Luftgenerator über die
Kanäle 3 und die regelbaren Austritte 4 - ― Schwachgas vom Gasregenerator über die
Kanäle 5 und die regelbaren Austritte 6 - ― Starkgas über die
Kanäle 7 und die auswechselbaren Düsen 8 - ― Sekundärluft über die
Kanäle 9 und die regelbaren Austritte 10 - ― Rückgas über die regelbaren Kanäle 11 (Kreisstromöffnungen)
- - Primary air from the air generator via the
channels 3 and thecontrollable outlets 4 - - Low gas from the gas regenerator via the
channels 5 and thecontrollable outlets 6 - - Strong gas via the
channels 7 and theinterchangeable nozzles 8 - - Secondary air via the
channels 9 and thecontrollable outlets 10 - - Return gas via the adjustable channels 11 (circuit flow openings)
Über die Höhe 12 findet im beflammten Heizzug die partielle Verbrennung statt.Partial combustion takes place above
Der Weg der Rauchgase führt vom beflammten Heizzug 2 über die Umkehrstelle 13 (ein Teil über den Differentialkanal 14) in den unbeflammten Heizzug 2a und über die Düsen und Kanäle 4a, 3a, 6a, 5a, 10a, 9a in die (nicht dargestellten) Abgasregeneratoren.The path of the flue gases leads from the flamed
In Fig. 1 und 2 ist die Strömungsrichtung der Medien sowohl für Schwachgas- als auch für Starkgasbeheizung durch Pfeile gekennzeichnet. Bei Schwachgasbetrieb strömt jedoch kein Starkgas, während bei Starkgasbetrieb die Schwachgaskanäle Verbrennungsluft führen.In FIGS. 1 and 2, the direction of flow of the media is indicated by arrows for both low-gas and high-gas heating. In the case of lean gas operation, however, no heavy gas flows, while in the case of heavy gas operation the lean gas ducts carry combustion air.
Die seitliche Begrenzung eines Heizzugpaares 1 erfolgt durch die Läuferwände 15 und die von dem Kanal 9 durchsetzten Binderwände 16. Die Teilung des Heizzugpaares 1 in die Heizzüge 2 und 2a geschieht durch die Binderwand 17, die von der Umkehrstelle 13 und der Kreisstromöffnung 11 durchsetzt wird.The lateral limitation of a pair of
Durch die Unterscheidung bzw. räumliche Trennung der Binderwände nach "Kreisstrom-besitzend" und "Luftkanalbesitzend" werden in Kombination mit den freistehenden Starkgasaustritten günstige Strömungsbedingungen sichergestellt, die eine weitgehende Einmischung des Kreisstromes in die Verbrennungsmedien der unteren Stufe ermöglichen.By differentiating or spatially separating the truss walls according to "owning the circular flow" and "owning the air duct", in combination with the free-standing high-pressure gas outlets, favorable flow conditions are ensured, which enable the circular flow to be largely mixed into the combustion media of the lower stage.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3812558 | 1988-04-15 | ||
DE3812558A DE3812558C2 (en) | 1988-04-15 | 1988-04-15 | Process for reducing the NO¶x¶ content in the flue gas when heating coking ovens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0337112A1 EP0337112A1 (en) | 1989-10-18 |
EP0337112B1 true EP0337112B1 (en) | 1992-01-15 |
Family
ID=6352061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89104099A Revoked EP0337112B1 (en) | 1988-04-15 | 1989-03-08 | Process for the diminution of the nox content of flue gases when heating coke ovens |
Country Status (5)
Country | Link |
---|---|
US (1) | US5017270A (en) |
EP (1) | EP0337112B1 (en) |
JP (1) | JP3020062B2 (en) |
CN (1) | CN1021338C (en) |
DE (2) | DE3812558C2 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5259932A (en) * | 1989-05-26 | 1993-11-09 | Didier Ofu Engineering Gmbh | Heating system for regenerative coke ovens |
EP0742276A1 (en) * | 1995-05-12 | 1996-11-13 | Krupp Koppers GmbH | Method for operating a coke oven |
EP1033396B1 (en) | 1999-03-04 | 2004-09-29 | The Japan Iron and Steel Federation | Coke oven and method of operating the same |
ITGE20040071A1 (en) | 2004-07-30 | 2004-10-30 | Sms Demag S P A | METHOD FOR COMBUSTION CONTROL IN COKE OVENS FOR THE REDUCTION OF NITROGEN OXIDES IN COKERIA GASES. |
JP4767730B2 (en) * | 2006-03-22 | 2011-09-07 | 新日本製鐵株式会社 | Coke oven operation method |
CN102517042B (en) * | 2011-06-21 | 2014-05-21 | 中冶焦耐(大连)工程技术有限公司 | Method for heating coke oven capable of controlling multistage combustion |
KR101277840B1 (en) * | 2011-07-15 | 2013-06-21 | 주식회사 포스코 | Cokes oven |
US9249357B2 (en) * | 2012-08-17 | 2016-02-02 | Suncoke Technology And Development Llc. | Method and apparatus for volatile matter sharing in stamp-charged coke ovens |
CN104818034B (en) * | 2015-04-15 | 2017-02-01 | 刘页宣 | Automatic adjustment method and device for controlling production of nitrogen oxide of coke oven |
CN108239551A (en) * | 2016-12-27 | 2018-07-03 | 宝山钢铁股份有限公司 | The method and system of NOx content in a kind of reduction coke oven flue gas |
CN106701108B (en) * | 2017-03-09 | 2022-03-08 | 安徽工业大学 | Coke oven circulating flue gas double-control pipe network device and using method thereof |
DE102017216439A1 (en) | 2017-09-15 | 2019-03-21 | Thyssenkrupp Ag | Coke oven apparatus with circulating flow path around it for producing coke and method for operating the coke oven apparatus, as well as control means and use |
TWI681048B (en) | 2017-09-15 | 2020-01-01 | 德商蒂森克虜伯工業解決方案股份有限公司 | Coke oven device having a circular flow path with an encircling flow around it for the production of coke, and method for operating the coke oven device, and control installation, and use thereof |
DE102017216436A1 (en) | 2017-09-15 | 2019-03-21 | Thyssenkrupp Ag | Coke oven apparatus with centric recirculation for producing coke and method for operating the coke oven apparatus as well as controller and use |
DE102017216437A1 (en) | 2017-09-15 | 2019-03-21 | Thyssenkrupp Ag | Coke oven apparatus having eccentric inlets for producing coke, and methods of operating the coke oven apparatus, and controller and use |
DE102019206628B4 (en) | 2019-05-08 | 2024-04-18 | Thyssenkrupp Ag | Coke oven device for producing coke and method for operating the coke oven device and use |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3373087A (en) * | 1964-08-31 | 1968-03-12 | Koppers Co Inc | Coke oven structure |
DE2416434A1 (en) * | 1974-04-04 | 1975-10-16 | Otto & Co Gmbh Dr C | COOKING OVEN |
DE2427032B2 (en) * | 1974-06-05 | 1978-06-29 | Dr. C. Otto & Co Gmbh, 4630 Bochum | Coking furnace arranged in batteries, regeneratively heatable with lean gas |
DE2738116B2 (en) * | 1977-08-24 | 1980-12-18 | Dr. C. Otto & Comp. Gmbh, 4630 Bochum | Double heating wall for coking furnace with horizontal chambers |
DE3149484C2 (en) * | 1981-12-14 | 1985-07-25 | Dr. C. Otto & Co Gmbh, 4630 Bochum | Heating system for regenerative heating of a coke oven battery with twin heating flues |
DE3443976A1 (en) * | 1984-12-01 | 1986-06-12 | Krupp Koppers GmbH, 4300 Essen | METHOD FOR REDUCING THE NO (ARROW DOWN) X (ARROW DOWN) CONTENT IN THE FLUE GAS IN THE HEATING OF COCING FURNACES AND FURNISHING OVEN FOR CARRYING OUT THE PROCEDURE |
DE3527345A1 (en) * | 1985-07-31 | 1987-02-12 | Still Carl Gmbh Co Kg | Heating equipment for regenerative coking oven batteries heatable by rich gas and lean gas |
-
1988
- 1988-04-15 DE DE3812558A patent/DE3812558C2/en not_active Expired - Lifetime
-
1989
- 1989-02-17 CN CN89100857A patent/CN1021338C/en not_active Expired - Lifetime
- 1989-03-08 EP EP89104099A patent/EP0337112B1/en not_active Revoked
- 1989-03-08 DE DE8989104099T patent/DE58900716D1/en not_active Revoked
- 1989-04-14 JP JP1093280A patent/JP3020062B2/en not_active Expired - Lifetime
-
1990
- 1990-08-02 US US07/561,941 patent/US5017270A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3812558A1 (en) | 1989-10-26 |
JP3020062B2 (en) | 2000-03-15 |
EP0337112A1 (en) | 1989-10-18 |
CN1021338C (en) | 1993-06-23 |
JPH01306494A (en) | 1989-12-11 |
DE3812558C2 (en) | 2001-02-22 |
DE58900716D1 (en) | 1992-02-27 |
US5017270A (en) | 1991-05-21 |
CN1036786A (en) | 1989-11-01 |
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