EP2064302A1 - Coke oven comprising tertiary heating elements in the gas chamber - Google Patents

Coke oven comprising tertiary heating elements in the gas chamber

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Publication number
EP2064302A1
EP2064302A1 EP07802202A EP07802202A EP2064302A1 EP 2064302 A1 EP2064302 A1 EP 2064302A1 EP 07802202 A EP07802202 A EP 07802202A EP 07802202 A EP07802202 A EP 07802202A EP 2064302 A1 EP2064302 A1 EP 2064302A1
Authority
EP
European Patent Office
Prior art keywords
heating elements
coking chamber
heb
coke oven
chamber
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Withdrawn
Application number
EP07802202A
Other languages
German (de)
French (fr)
Inventor
Kim Ronald
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Uhde GmbH
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Filing date
Publication date
Application filed by Uhde GmbH filed Critical Uhde GmbH
Publication of EP2064302A1 publication Critical patent/EP2064302A1/en
Withdrawn legal-status Critical Current

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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
    • C10B15/00—Other coke ovens
    • C10B15/02—Other coke ovens with floor heating
    • 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
    • C10B29/00—Other details of coke ovens
    • 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
    • C10B29/00—Other details of coke ovens
    • C10B29/02—Brickwork, e.g. casings, linings, walls
    • 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
    • C10B5/00—Coke ovens with horizontal chambers
    • C10B5/06—Coke ovens with horizontal chambers with horizontal heating flues
    • 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

Definitions

  • the invention relates to a coke oven in a horizontal design (non- / heat recovery type), the at least one coking chamber, arranged laterally thereto vertical exhaust channels ("down corner") and horizontally and below the coking chamber arranged bottom channels for indirect heating of Coking chamber comprises, wherein one or more heating elements are arranged in the gas space, which is not provided for the filling of solid in the normal operation of the coke oven.
  • Coke ovens in a horizontal design are known in the art and often in use. Examples of such coke ovens are described in US 4,111,757, US 4,344,820, US 6,596,128 B2 or DE 691 06 312 T2.
  • DE 10 2005 025955 proposes the multiple supply of combustion air, which is realized via a distribution system, which is arranged substantially on the furnace roof. Through this distribution system, combustion air is passed from above through the furnace roof through many openings in the furnace chamber. This system of supplying combustion gas represents a significant improvement over the central introduction of combustion air through openings in the oven door. However, there remains a need to improve the gas flow in the coke oven. oven and to reduce coking time, thus improving the efficiency of the process.
  • This object is achieved by the Koksofen defined in the main claim in a horizontal design (non- / heat recovery type).
  • This coke oven comprises at least one coking chamber, laterally arranged thereto vertical exhaust ducts (down corner) as well as horizontally and below the coking chamber arranged bottom channels for indirect heating of the coking chamber, being provided in the gas space, which is not intended for the filling with solid in the normal operation of the coke oven, one or more heating elements are arranged.
  • the heating elements may have any shape and are ideally formed as a hanging ribs or hanging walls and can be further improved to the effect that they have openings or a partially open structure.
  • the heating elements can be attached in any manner in the oven chamber.
  • the tertiary heating elements are releasably suspended in suitable brackets, the brackets being mounted in the wall and / or ceiling of the coking chamber. This has the advantage that, on the one hand, the tertiary heating elements can be removed more easily when work on the coke oven chamber is required and, on the other hand, it is thus avoided that expansion processes are transferred into the furnace masonry.
  • a further improved embodiment of the coke oven is to adapt the gas guide to the positioning of the heating elements.
  • the gas guide in a sectional subdivision of the coking chamber by the heating elements, in each of these sections at least one air supply line is led out and led out of each of these sections one or two exhaust ducts (down corner).
  • An improved variant of the coke oven is that at least a part of the inner walls of the coking chamber and / or a part of the Surfaces of the heating elements are formed as secondary heating surfaces by being coated with a high emission coating (HEB), wherein the emissivity of this high emission coating is equal to or greater than 0.9.
  • HEB high emission coating
  • This HEB is preferably made of the materials Cr 2 O 3 or Fe 2 O 3 or from a mixture containing these substances, wherein the proportion of Fe 2 O 3 in a mixture at least 25 wt .-% and the proportion of Cr 2 O 3 in a mixture is at least 20% by weight.
  • the HEB may also contain SiC in a proportion of at least 20% by weight.
  • the HEB further contains one or more inorganic binders. It has also been found that the ingredients of the HEB should have a specific grain size that is less than or equal to 15 microns and ideally between 2.5 and 10 microns.
  • the radiation situation in the coke oven space is significantly improved and further accelerated from top to bottom coking.
  • the coke oven can be further improved to the effect that the walls of the flue gas ducts running horizontally below the coking chamber are completely or partially coated with HEB in one of the above-described composition, whereby the indirect heat transport through the bottom of the coke oven is improved becomes.
  • the invention also includes a method for producing coke using the coke oven described above, wherein one of the embodiments is used. As a rule, a large number of the described coke ovens are operated more or less in parallel.
  • FIG. 1 shows a sectional view of the coke oven according to the invention.
  • the coke oven 1 has a furnace roof 2, furnace walls 3 and a furnace bottom 4, which surround the furnace chamber 5.
  • the introduced coal bed 7 rests on the oven floor 4 and flue gas ducts 8 run below the oven floor 4.
  • the air supply lines 10 provided in the furnace foundation 9 are shown in cross-section through which air into the flue gas ducts 8 can be directed.
  • the inner surfaces of the furnace chamber 5 are provided with a HEB, which consist of equal parts of Cr 2 O 3 , Fe 2 O 3 and SiC.
  • This HEB the inner walls, making them to secondary heating surfaces, has not been shown.
  • heating elements 12, tertiary heating surfaces, are introduced vertically and parallel to one another, which largely fill the free cross section above the carbon charge 7, which are likewise coated with this HEB.
  • the heating elements 12 are on holding elements 13, which here have the form of wall and Deckenankem attached.
  • a small, circumferential gap 14 remains between the inner wall surfaces of the oven chamber 5, the coal bed 7 and the outer edge of the heating element 12 to allow horizontal convection in the oven chamber 5 and to prevent material damage due to differences in the expansion behavior of the components.
  • Fig. 2 shows the coke oven 1 according to the invention in a further sectional view.
  • the reference numerals of Fig. 1 apply analogously.
  • Clearly visible is the subdivision of the oven chamber 5 by the heating elements 12 in six sections, wherein in each section air supply 6 lead ren and the openings 15 and the flue gas ducts 8 and 11 gas can leave the oven chamber 5 again.
  • the introduction of combustion air in the Oven sections adjacent to the oven door 16 are for air inlets 6 provided in the oven door 16 itself.
  • the heating elements 12 are fastened to retaining elements 13 which are provided in the furnace roof 2 and the furnace wall 3 for this purpose.
  • a special suspension for the heating elements 12 is shown in a sectional drawing, wherein the adjoining the oven door 16 Abschitt the coke oven 1 is shown.
  • the hanging in the oven chamber 5 heating element 12 is spaced with a gap 14 from the coal bed 7.
  • the heating element 12 is fastened in the furnace roof 2 via one or more retaining elements.
  • This holding element consists essentially of a ceiling plate 17, a pull rod 18 and a bottom plate 19.
  • the pull rod 18 is inserted through a ceiling opening 20 and is held by the ceiling plate 17, which simultaneously closes the ceiling opening 20 completely. Furthermore, the pull rod is guided from top to bottom through the heating element 12 and installed in this.
  • the main weight of the heating element 12 rests on the bottom plate 19 of the holding element, which is fastened to the lower end of the pull rod 18.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coke Industry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

The invention relates to a horizontally designed, non-heat recovery-type coke oven comprising at least one coking chamber, downcomers that are laterally disposed relative to the coking chamber, and bottom ducts which are horizontally arranged below the coking chamber in order to indirectly heat the coking chamber. One or more heating elements are located in the gas chamber which is not filled with solid matter when the coke oven is appropriately used.

Description

KOKSOFEN MIT TERTIÄREN HEIZELEMENTEN IN DEM GASRAUM KOKSOFEN WITH TERTIARY HEATING ELEMENTS IN THE GAS ROOM
[0001] Die Erfindung betrifft einen Koksofen in horizontaler Bauweise (Non- /Heat Recovery Typ), der mindestens eine Verkokungskammer, seitlich hierzu angeordnete vertikale Abgaskanäle ("Down Corner") sowie horizontal und un- terhalb der Verkokungskammer angeordnete Bodenkanäle zur indirekten Erwärmung der Verkokungskammer umfasst, wobei in dem Gasraum, welcher im bestimmungsgemäßen Betrieb des Koksofens nicht für die Befüllung mit Feststoff vorgesehen ist, ein oder mehrere Heizelemente angeordnet sind.The invention relates to a coke oven in a horizontal design (non- / heat recovery type), the at least one coking chamber, arranged laterally thereto vertical exhaust channels ("down corner") and horizontally and below the coking chamber arranged bottom channels for indirect heating of Coking chamber comprises, wherein one or more heating elements are arranged in the gas space, which is not provided for the filling of solid in the normal operation of the coke oven.
[0002] Koksöfen in horizontaler Bauweise sind im Stand der Technik bekannt und vielfach im Einsatz. Beispiele für derartige Koksöfen sind in US 4,111 ,757, US 4,344,820, US 6,596,128 B2 oder DE 691 06 312 T2.Coke ovens in a horizontal design are known in the art and often in use. Examples of such coke ovens are described in US 4,111,757, US 4,344,820, US 6,596,128 B2 or DE 691 06 312 T2.
[0003] Es sind aus dem Stand der Technik unterschiedliche Wege bekannt, um die Garungszeit der Kohle zu beschleunigen und ein gleichmäßiges Voranschreiten der Verkokung in der Kohleschüttung oder dem gestampften Kohle- kuchen sicher zu stellen.[0003] Different ways are known from the prior art to accelerate the cooking time of the coal and to ensure a uniform advancement of coking in the coal bed or the mashed coal cake.
[0004] Hier wurde sehr stark der Weg beschriften, die Gasführung im Ofenraum zu verbessern. In der DE 10 2005 055483 wird vorgeschlagen, die Luftzufuhr, welche über die Ofentüren erfolgt, zu automatisieren und abhängig von der Garungszeit über einen zentralen Antrieb zu steuern. Auch wenn hiermit eine gute Regelbarkeit erreicht wird, besteht nach wie vor das Problem, die Tiefe des Ofenraumes gleichmäßig mit Verbrennungsluft zu versorgen, ohne den Ab- brand im türnahen Bereich unnötig stark zu erhöhen.Here was very strong the way to improve the gas flow in the oven room. In DE 10 2005 055483 it is proposed to automate the air supply, which takes place via the oven doors, and to control them, depending on the cooking time, via a central drive. Even if this achieves good controllability, there is still the problem of uniformly supplying the depth of the furnace chamber with combustion air, without unnecessarily increasing the burn-off in the area close to the door.
[0005] DE 10 2005 025955 schlägt die mehrfache Zuleitung von Verbrennungsluft vor, welche über ein Verteilersystem realisiert wird, das im Wesentlichen auf der Ofendecke angeordnet ist. Über dieses Verteilersystem wird Verbrennungsluft von oben durch die Ofendecke durch viele Öffnungen in den Ofenraum geleitet. Dieses System der Zuleitung von Verbrennungsgas stellt eine deutliche Verbesserung gegenüber der zentralen Einleitung von Verbrennungsluft über Öffnungen in der Ofentür dar. Es bleibt aber Bedarf, die Gasführung im Koks- ofen weiter zu verbessern und die Verkokungszeit zu verringern und damit die Wirtschaftlichkeit des Verfahrens zu verbessern.DE 10 2005 025955 proposes the multiple supply of combustion air, which is realized via a distribution system, which is arranged substantially on the furnace roof. Through this distribution system, combustion air is passed from above through the furnace roof through many openings in the furnace chamber. This system of supplying combustion gas represents a significant improvement over the central introduction of combustion air through openings in the oven door. However, there remains a need to improve the gas flow in the coke oven. oven and to reduce coking time, thus improving the efficiency of the process.
[0006] Diese Aufgabe wird durch den gemäß dem Hauptanspruch definierten Koksofen in horizontaler Bauweise (Non-/Heat Recovery Typ) gelöst. Dieser Koksofen umfasst mindestens eine Verkokungskammer, seitlich hierzu angeordnete vertikale Abgaskanäle (Down Corner) sowie horizontal und unterhalb der Verkokungskammer angeordnete Bodenkanäle zur indirekten Erwärmung der Verkokungskammer, wobei in dem Gasraum, welcher im bestimmungsgemäßen Betrieb des Koksofens nicht für die Befüllung mit Feststoff vorgesehen ist, ein oder mehrere Heizelemente angeordnet sind.This object is achieved by the Koksofen defined in the main claim in a horizontal design (non- / heat recovery type). This coke oven comprises at least one coking chamber, laterally arranged thereto vertical exhaust ducts (down corner) as well as horizontally and below the coking chamber arranged bottom channels for indirect heating of the coking chamber, being provided in the gas space, which is not intended for the filling with solid in the normal operation of the coke oven, one or more heating elements are arranged.
[0007] Die Heizelemente können dabei eine beliebige Form aufweisen und sind idealerweise als hängende Rippen oder hängende Wände geformt und können dahingehend weiter verbessert werden, dass diese Öffnungen oder eine teilweise offene Struktur aufweisen.The heating elements may have any shape and are ideally formed as a hanging ribs or hanging walls and can be further improved to the effect that they have openings or a partially open structure.
[0008] Grundsätzlich können die Heizelemente in beliebiger Weise in der Ofenkammer befestigt werden. Idealerweise werden die tertiären Heizelemente lösbar in geeignete Halterungen eingehängt, wobei die Halterungen in der Wand und/oder in der Decke der Verkokungskammer angebracht sind. Dies hat den Vorteil, dass die tertiären Heizelemente zum einen leichter entnommen werden können, wenn Arbeiten an der Koksofenkammer erforderlich sind, und zum anderen wird so vermieden, dass Dehnungsvorgänge in das Ofenmauerwerk übertragen werden.In principle, the heating elements can be attached in any manner in the oven chamber. Ideally, the tertiary heating elements are releasably suspended in suitable brackets, the brackets being mounted in the wall and / or ceiling of the coking chamber. This has the advantage that, on the one hand, the tertiary heating elements can be removed more easily when work on the coke oven chamber is required and, on the other hand, it is thus avoided that expansion processes are transferred into the furnace masonry.
[0009] Eine weiter verbesserte Ausführungsvariante des Koksofens besteht darin, die Gasführung an die Positionierung der Heizelemente anzupassen. Somit wird bei einer abschnittsweisen Unterteilung der Verkokungskammer durch die Heizelemente, in jeden dieser Abschnitte mindestens eine Zuluftleitung hineingeführt und aus jedem dieser Abschnitte ein oder zwei Abgaskanäle (Down Corner) herausgeführt.A further improved embodiment of the coke oven is to adapt the gas guide to the positioning of the heating elements. Thus, in a sectional subdivision of the coking chamber by the heating elements, in each of these sections at least one air supply line is led out and led out of each of these sections one or two exhaust ducts (down corner).
[0010] Eine verbesserte Variante des Koksofens besteht darin, dass mindes- tens ein Teil der Innenwände der Verkokungskammer und/oder ein Teil der Oberflächen der Heizelemente als sekundäre Heizflächen ausgebildet werden, indem diese mit einer Hochemissionsbeschichtung (HEB) beschichtet sind, wobei der Emissionsgrad dieser Hochemissionsbeschichtung gleich oder größer als 0,9 ist.An improved variant of the coke oven is that at least a part of the inner walls of the coking chamber and / or a part of the Surfaces of the heating elements are formed as secondary heating surfaces by being coated with a high emission coating (HEB), wherein the emissivity of this high emission coating is equal to or greater than 0.9.
[0011] Diese HEB besteht bevorzugt aus den Stoffen Cr2O3 oder Fe2O3 oder aus einer diese Stoffe enthaltenen Mischung, wobei der Anteil an Fe2O3 in einer Mischung mindestens 25 Gew.-% und der Anteil von Cr2O3 in einer Mischung mindestens 20 Gew.-% beträgt. Alternativ kann die HEB auch SiC mit einem Anteil von mindestens 20 Gew.-% enthalten.This HEB is preferably made of the materials Cr 2 O 3 or Fe 2 O 3 or from a mixture containing these substances, wherein the proportion of Fe 2 O 3 in a mixture at least 25 wt .-% and the proportion of Cr 2 O 3 in a mixture is at least 20% by weight. Alternatively, the HEB may also contain SiC in a proportion of at least 20% by weight.
[0012] In einer verbesserten Variante des Koksofens, enthält die HEB weiterhin ein oder mehrere anorganische Bindemittel. Es hat sich weiterhin herausgestellt, dass die Inhaltsstoffe der HEB eine spezielle Korngröße aufweisen sollte, die kleiner oder gleich 15 μm ist und idealerweise zwischen 2,5 und 10 μm liegt.In an improved variant of the coke oven, the HEB further contains one or more inorganic binders. It has also been found that the ingredients of the HEB should have a specific grain size that is less than or equal to 15 microns and ideally between 2.5 and 10 microns.
[0013] Durch die HEB wird die Strahlungssituation im Koksofenraum erheblich verbessert und der von oben nach unten ablaufende Verkokungsvorgang weiter beschleunigt.By the HEB, the radiation situation in the coke oven space is significantly improved and further accelerated from top to bottom coking.
[0014] Der Koksofen kann dahingehend weiter verbessert werden, dass die Wände der horizontal unterhalb der Verkokungskammer verlaufenden Rauchgaskanäle ganz oder teilweise mit HEB in einer der oben beschriebenen stoffli- chen Zusammensetzung beschichtet sind, wodurch der indirekte Wärmetransport durch den Boden der Koksofen kam mer verbessert wird.The coke oven can be further improved to the effect that the walls of the flue gas ducts running horizontally below the coking chamber are completely or partially coated with HEB in one of the above-described composition, whereby the indirect heat transport through the bottom of the coke oven is improved becomes.
[0015] Von der Erfindung ist auch ein Verfahren zur Herstellung von Koks unter Einsatz des vorstehend beschriebenen Koksofens umfasst, wobei eine der Ausführungsformen eingesetzt wird. In der Regel werden dabei eine Vielzahl der beschriebenen Koksöfen mehr oder weniger parallel betrieben.The invention also includes a method for producing coke using the coke oven described above, wherein one of the embodiments is used. As a rule, a large number of the described coke ovens are operated more or less in parallel.
[0016] Eine besonders geeignete Variante des Verfahrens sieht vor, dass die Temperatur in der Verkokungskammer während des Verkokungsvorgangs idealerweise im Durchschnitt 1.000 bis 1.400°C beträgt. Dabei kann diese Temperatur kurzzeitig auch überschritten werden. [0017] Fig. 1 zeigt in einer Schnittdarstellung den erfindungsgemäßen Koksofen. Der Koksofen 1 weist eine Ofendecke 2, Ofenwände 3 und einen Ofenboden 4 auf, welche den Ofenraum 5 umschließen. In den Ofenraum 5 führen die gestrichelt dargestellten Luftzuführungen 6. Auf dem Ofenboden 4 ruht die ein- gebrachte Kohleschüttung 7 und unterhalb des Ofenbodens 4 verlaufen Rauchgaskanäle 8. Weiterhin sind im Querschnitt die im Ofenfundament 9 vorgesehenen Luftzuführungen 10 gezeigt, über welche Luft in die Rauchgaskanäle 8 geleitet werden kann.A particularly suitable variant of the method provides that the temperature in the coking chamber during the coking process is ideally on average 1,000 to 1,400 ° C. This temperature can be exceeded for a short time. Fig. 1 shows a sectional view of the coke oven according to the invention. The coke oven 1 has a furnace roof 2, furnace walls 3 and a furnace bottom 4, which surround the furnace chamber 5. The introduced coal bed 7 rests on the oven floor 4 and flue gas ducts 8 run below the oven floor 4. Furthermore, the air supply lines 10 provided in the furnace foundation 9 are shown in cross-section through which air into the flue gas ducts 8 can be directed.
[0018] Über vertikale Rauchgaskanäle 11 ("Down Corner"), welche in den Ofenwänden 3 vom Gasraum des Ofenraumes 5 zu den horizontalen Rauchgaskanälen 8 unterhalb des Ofenbodens 4 verlaufen, können die bei der Verkokung entstehenden Gase abgeleitet werden.Via vertical flue gas ducts 11 ("Down Corner"), which run in the furnace walls 3 from the gas space of the furnace chamber 5 to the horizontal flue gas ducts 8 below the furnace bottom 4, the gases produced during the coking can be derived.
[0019] Die inneren Oberflächen des Ofenraumes 5 sind mit einer HEB versehen, welche zu gleichen Teilen aus Cr2O3, Fe2O3 und SiC bestehen. Diese HEB der Innenwände, wodurch diese zu sekundären Heizflächen werden, ist nicht weiter dargestellt worden. Weiterhin sind im Ofenraum 5 vertikal und parallel zueinander Heizelemente 12, tertiäre Heizflächen, eingebracht, welche weitest- gehend den freien Querschnitt oberhalb der Kohleschüttung 7 ausfüllen, die ebenfalls mit dieser HEB beschichtet sind. Die Heizelemente 12 sind an Halte- elementen 13, die hier die Form von Wand- und Deckenankem aufweisen, angebracht. In dem gezeigten Beispiel verbleibt ein kleiner, umlaufender Spalt 14 zwischen den Innenwandflächen des Ofenraumes 5, der Kohleschüttung 7 und der Außenkante des Heizelementes 12, um die horizontale Konvektion im Ofenraum 5 zu ermöglichen und um Materialschäden aufgrund von Unterschieden im Dehnungsverhalten der Bauteile zu verhindern.The inner surfaces of the furnace chamber 5 are provided with a HEB, which consist of equal parts of Cr 2 O 3 , Fe 2 O 3 and SiC. This HEB the inner walls, making them to secondary heating surfaces, has not been shown. Furthermore, in the furnace chamber 5, heating elements 12, tertiary heating surfaces, are introduced vertically and parallel to one another, which largely fill the free cross section above the carbon charge 7, which are likewise coated with this HEB. The heating elements 12 are on holding elements 13, which here have the form of wall and Deckenankem attached. In the example shown, a small, circumferential gap 14 remains between the inner wall surfaces of the oven chamber 5, the coal bed 7 and the outer edge of the heating element 12 to allow horizontal convection in the oven chamber 5 and to prevent material damage due to differences in the expansion behavior of the components.
[0020] Fig. 2 zeigt den erfindungsgemäßen Koksofen 1 in einer weiteren Schnittdarstellung. Die Bezugszeichen der Fig. 1 gelten in analoger Weise. Deutlich zu erkennen ist die Unterteilung des Ofenraums 5 durch die Heizelemente 12 in sechs Abschnitte, wobei in jedem Abschnitt Luftzuführungen 6 füh- ren und über die Öffnungen 15 und die Rauchgaskanäle 8 und 11 Gas den Ofenraum 5 wieder verlassen kann. Das Einleiten von Verbrennungsluft in die Ofenabschnitte, die an die Ofentür 16 angrenzen, erfolgt für Luftzuführungen 6, die in der Ofentür 16 selbst vorgesehen sind. Die Heizelemente 12 sind an Halteelementen 13 befestigt, die in der Ofendecke 2 und der Ofenwand 3 hierfür vorgesehen sind.Fig. 2 shows the coke oven 1 according to the invention in a further sectional view. The reference numerals of Fig. 1 apply analogously. Clearly visible is the subdivision of the oven chamber 5 by the heating elements 12 in six sections, wherein in each section air supply 6 lead ren and the openings 15 and the flue gas ducts 8 and 11 gas can leave the oven chamber 5 again. The introduction of combustion air in the Oven sections adjacent to the oven door 16 are for air inlets 6 provided in the oven door 16 itself. The heating elements 12 are fastened to retaining elements 13 which are provided in the furnace roof 2 and the furnace wall 3 for this purpose.
[0021] In Fig. 3 ist in einer Schnittzeichnung eine spezielle Aufhängung für die Heizelemente 12 dargestellt, wobei der an die Ofentür 16 angrenzende Abschitt des Koksofens 1 gezeigt ist. Das im Ofenraum 5 hängende Heizelement 12 ist mit einem Spalt 14 von der Kohleschüttung 7 beabstandet. Das Heizelement 12 ist über eine oder mehrere Halteelemente in der Ofendecke 2 befestigt. Dieses Halteelement besteht im Wesentlichen aus einer Deckenplatte 17, einer Zugstange 18 und einer Bodenplatte 19. Die Zugstange 18 ist durch eine Deckenöffnung 20 gesteckt und wird von der Deckenplatte 17 gehalten, die gleichzeitig die Deckenöffnung 20 vollständig verschließt. Weiterhin ist die Zugstange von oben nach unten durch das Heizelement 12 geführt beziehungsweise in dieses eingebaut. Das Hauptgewicht des Heizelementes 12 ruht dabei auf der Bodenplatte 19 des Halteelements, die am unteren Ende der Zugstange 18 befestigt ist.In Fig. 3 a special suspension for the heating elements 12 is shown in a sectional drawing, wherein the adjoining the oven door 16 Abschitt the coke oven 1 is shown. The hanging in the oven chamber 5 heating element 12 is spaced with a gap 14 from the coal bed 7. The heating element 12 is fastened in the furnace roof 2 via one or more retaining elements. This holding element consists essentially of a ceiling plate 17, a pull rod 18 and a bottom plate 19. The pull rod 18 is inserted through a ceiling opening 20 and is held by the ceiling plate 17, which simultaneously closes the ceiling opening 20 completely. Furthermore, the pull rod is guided from top to bottom through the heating element 12 and installed in this. The main weight of the heating element 12 rests on the bottom plate 19 of the holding element, which is fastened to the lower end of the pull rod 18.
[0022] Durch diese Aufteilung des Koksofens in Abschnitte mit der abschnittsweisen Gasführung und die Vergleichmäßigung der Strahlung durch die Heiz- elemente, konnte die Garungszeit gesenkt und die Verluste am Produkt im Nahbereich der Ofentüren minimiert werden. As a result of this division of the coke oven into sections with the gas guide in sections and the homogenization of the radiation by the heating elements, the cooking time was reduced and the losses of the product in the vicinity of the oven doors could be minimized.
[0023] Bezugszeichenliste[0023] List of Reference Numerals
1 Koksofen1 coke oven
2 Ofendecke2 oven ceiling
3 Ofenwand3 oven wall
4 Ofenboden4 oven floor
5 Ofenraum5 oven room
6 Luftzuführung6 air supply
7 Kohleschüttung7 coal bed
8 Rauchgaskanal8 flue gas duct
9 Ofenfundament9 furnace foundation
10 Luftzuführung10 air supply
11 Rauchgaskanal ("Down Corner")11 flue gas channel ("down corner")
12 Heizelement12 heating element
13 Halteelement13 retaining element
14 Spalt14 gap
15 Öffnung15 opening
16 Ofentür16 oven door
17 Deckenplatte17 ceiling plate
18 Zugstange18 drawbar
19 Bodenplatte19 base plate
20 Deckendurchführung 20 ceiling penetration

Claims

PATENTANSPRÜCHE
1. Koksofen in horizontaler Bauweise (Non-/Heat Recovery Typ) umfassend mindestens eine Verkokungskammer, seitlich hierzu angeordnete vertikale Abgaskanäle (Down Corner) sowie horizontal und unterhalb der Verkokungskammer angeordnete Bodenkanäle zur indirekten Erwärmung der Verkokungskammer, dadurch gekennzeichnet, dass in dem Gasraum, welcher im bestimmungsgemäßen Betrieb des Koksofens nicht für die Befüllung mit Feststoff vorgesehen ist, ein oder mehrere Heizelemente angeordnet sind.1. coke oven in a horizontal design (non- / heat recovery type) comprising at least one coking chamber, laterally thereto arranged vertical exhaust ducts (down corner) and horizontal and below the coking chamber arranged bottom channels for indirect heating of the coking chamber, characterized in that in the gas space, which is not provided for the filling with solid in the normal operation of the coke oven, one or more heating elements are arranged.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Heizelemente eine beliebige Form aufweisen und idealerweise als hängende Rippen oder hängende Wände geformt sind, wobei diese tertiären Heizelemente Öffnungen oder eine teilweise offene Struktur aufweisen können.2. Device according to claim 1, characterized in that the heating elements have any shape and are ideally shaped as hanging ribs or hanging walls, said tertiary heating elements may have openings or a partially open structure.
3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die tertiären Heizelemente lösbar in geeignete Halterungen eingehängt werden können, wobei die Halterungen in der Wand und/oder in der Decke der Verkokungskammer angebracht sind.3. Device according to one of claims 1 or 2, characterized in that the tertiary heating elements can be releasably mounted in suitable brackets, wherein the brackets are mounted in the wall and / or in the ceiling of the coking chamber.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die bei einer abschnittsweisen Unterteilung der Verkokungskammer durch die Heizelemente, in jedem dieser Abschnitte mindestens eine Zuluftleitung hineinführt und aus jedem dieser Abschnitte ein oder zwei Abgaskanäle ("Down Corner") herausführen.4. Device according to one of claims 1 to 3, characterized in that in a section-wise subdivision of the coking chamber by the heating elements, in each of these sections at least one air supply line leads and lead out of each of these sections one or two exhaust ducts ("down corner") ,
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die mindestens ein Teil der Innenwände der Verkokungskammer und/oder ein Teil der Oberflächen der Heizelemente als sekundäre Heizfläche ausgebildet sind, indem diese mit einer Hochemissionsbeschichtung (HEB) be- schichtet sind, wobei der Emissionsgrad dieser Hochemissionsbeschichtung gleich oder größer als 0,9 ist.5. Device according to one of claims 1 to 4, characterized in that the at least a part of the inner walls of the coking chamber and / or a part of the surfaces of the heating elements are formed as a secondary heating surface by these with a high emission coating (HEB) be are layered, with the emissivity of this high emission coating being equal to or greater than 0.9.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die HEB aus den Stoffen Cr2O3 oder Fe2O3 oder aus einer diese Stoffe enthaltenen Mischung besteht, wobei der Anteil an Fe2O3 in einer Mischung mindestens 25 Gew.-% und der Anteil von Cr2O3 in einer Mischung mindestens 20 Gew.-% beträgt.6. The device according to claim 5, characterized in that the HEB consists of the substances Cr 2 O 3 or Fe 2 O 3 or from a mixture containing these substances, wherein the proportion of Fe 2 O 3 in a mixture at least 25 wt. % and the proportion of Cr 2 O 3 in a mixture is at least 20% by weight.
7. Vorrichtung nach einem der beiden Ansprüche 5 oder 6, dadurch gekennzeichnet, dass die HEB weiterhin SiC mit einem Anteil von mindestens 20 Gew.-% enthält.7. Device according to one of the two claims 5 or 6, characterized in that the HEB further contains SiC in a proportion of at least 20 wt .-%.
8. Vorrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass die HEB weiterhin ein oder mehrere anorganische Bindemittel enthält.8. Device according to one of claims 5 to 7, characterized in that the HEB further contains one or more inorganic binders.
9. Vorrichtung nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass die Korngröße der HEB Inhaltsstoffe kleiner oder gleich 15 μm ist und idealerweise zwischen 2,5 und 10 μm liegt.9. Device according to one of claims 5 to 8, characterized in that the grain size of the HEB ingredients is less than or equal to 15 microns and ideally between 2.5 and 10 microns.
10. Vorrichtung nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass die Wände der horizontal unterhalb der Verkokungskammer verlaufenden Rauchgaskanäle ganz oder teilweise mit HEB in einer der oben beschrieb- nen stofflichen Zusammensetzung beschichtet sind.10. Device according to one of claims 5 to 9, characterized in that the walls of the horizontally extending below the coking chamber flue gas ducts are completely or partially coated with HEB in one of the above-described material composition.
11.Verfahren zur Herstellung von Koks unter Einsatz eines Koksofens oder mehrerer Koksöfen gemäß einem der vorstehenden Ansprüche.11.The method for producing coke using a coke oven or multiple coke ovens according to one of the preceding claims.
12. Verfahren nach Anspruch 11 , dadurch gekennzeichnet, dass die Verkokung bei einer mittleren Ofenraumtemperatur von 1.000 bis 1.4000C durchgeführt wird. 12. The method according to claim 11, characterized in that the coking is carried out at an average furnace chamber temperature of 1000 to 1400 0 C.
EP07802202A 2006-09-21 2007-09-07 Coke oven comprising tertiary heating elements in the gas chamber Withdrawn EP2064302A1 (en)

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DE102006045056A DE102006045056A1 (en) 2006-09-21 2006-09-21 coke oven
PCT/EP2007/007812 WO2008034531A1 (en) 2006-09-21 2007-09-07 Coke oven comprising tertiary heating elements in the gas chamber

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MY148757A (en) 2013-05-31
CO6170369A2 (en) 2010-06-18
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TWI445812B (en) 2014-07-21
RU2441899C2 (en) 2012-02-10

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