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EP2064303A1 - Coke oven featuring improved heating properties - Google Patents

Coke oven featuring improved heating properties

Info

Publication number
EP2064303A1
EP2064303A1 EP07801565A EP07801565A EP2064303A1 EP 2064303 A1 EP2064303 A1 EP 2064303A1 EP 07801565 A EP07801565 A EP 07801565A EP 07801565 A EP07801565 A EP 07801565A EP 2064303 A1 EP2064303 A1 EP 2064303A1
Authority
EP
European Patent Office
Prior art keywords
heb
coking chamber
heating elements
chamber
coking
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.)
Granted
Application number
EP07801565A
Other languages
German (de)
French (fr)
Other versions
EP2064303B1 (en
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Uhde GmbH filed Critical Uhde GmbH
Publication of EP2064303A1 publication Critical patent/EP2064303A1/en
Application granted granted Critical
Publication of EP2064303B1 publication Critical patent/EP2064303B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • C10B23/00—Other methods of heating 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
    • 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
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings ; Increasing the durability of linings; Breaking away linings
    • F27D1/1678—Increasing the durability of linings; Means for protecting

Definitions

  • the invention relates to a coke oven in a horizontal design (non- / heat recovery type), wherein at least a portion of the inner walls of the coking chamber are formed as a secondary heating surface by these are coated with a high emission coating (HEB), the emissivity of this High emission coating is equal to or greater than 0.9.
  • This HEB preferably consists of the substances Cr 2 O 3 or Fe 2 O 3 or of 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 wt .-% is.
  • 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.
  • EP 0 742 276 B1 describes, for the structurally different horizontal chamber furnaces, a method for improving the heat transfer, from the parallel heating cables outside the actual furnace chamber into the coal charge.
  • the surfaces of the coke oven chamber parallel heating cables are coated so that they act as a black body and the heat transport through the wall is improved.
  • 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, vertical down (down corner) ducts, and bottom ducts for heating the coking chamber horizontally and below the coking chamber, at least part of the interior walls of the coking chamber being a secondary heating surface by being coated with a high emissivity coating (US Pat. HEB) are coated, wherein the emissivity of this high emission coating is equal to or greater than 0.9.
  • 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 coke oven can be further improved to the effect 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, whereby the indirect heat transfer through the bottom of the coke oven chamber is improved.
  • a further improved variant is that in the gas space, which is not provided in the normal operation of the coke oven for the filling with solid, one or more heating elements, so-called tertiary heating elements are arranged, which also completely or partially with the HEB described above are coated.
  • these tertiary heating elements may also consist entirely or partially of the substances forming the HEB or be formed.
  • the tertiary heating elements can have any shape and are ideally shaped as hanging ribs or hanging walls.
  • the tertiary heating elements can be further improved in that these openings have a partially open structure.
  • the tertiary heating elements can be attached in any way 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.
  • a further improved embodiment of the coke oven is to adapt the gas guide to the positioning of the tertiary heating elements.
  • led into each of these sections at least one air supply line and led out of each of these sections one or two exhaust ducts (down corner).
  • the invention also includes a process for the production of coke using the above described coke oven, 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 an embodiment of the coke oven according to the invention in a sectional view.
  • 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 oven chamber 5 are verse- hen with a HEB, which consist of equal parts of Cr 2 ⁇ 3, Fe 2 O 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 connected to holding elements 13, which here have the form of wall and ceiling anchors attached.
  • a small, circumferential gap 14 remains between the inner wall surfaces of the furnace chamber 5, the coal bed 7 and the outer edge of the heating element 12 to allow horizontal convection in the oven cavity 5 and material damage due to differences in the expansion behavior of the components prevent.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Coke Industry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Furnace Details (AREA)
  • Ceramic Products (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 in relation to the coking chamber, and bottom ducts which are horizontally arranged below the coking chamber in order to indirectly heat the coking chamber. At least some of the interior walls of the coking chamber are embodied as a secondary heating area by coating the interior walls with a high-emission coating (HEB). The minimum emissivity of said high-emission coating is 0.9. Preferably, the high-emission coating (HEB) is made of Cr2O3, Fe2O3, or a mixture containing said substances, the Fe2O3 moiety in a mixture amounting to at least 25 percent by weight and the Cr2O3 moiety in a mixture amounting to at least 20 percent by weight.

Description

Koksofen mit verbesserten Heizeigenschaften Coke oven with improved heating properties
[0001] Die Erfindung betrifft einen Koksofen in horizontaler Bauweise (Non- /Heat Recovery Typ), bei welchem mindestens ein Teil der Innenwände der Verkokungskammer als sekundäre Heizfläche ausgebildet sind, indem diese mit einer Hochemissionsbeschichtung (HEB) beschichtet sind, wobei der Emissionsgrad dieser Hochemissionsbeschichtung gleich oder größer als 0,9 ist. 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.The invention relates to a coke oven in a horizontal design (non- / heat recovery type), wherein at least a portion of the inner walls of the coking chamber are formed as a secondary heating surface by these are coated with a high emission coating (HEB), the emissivity of this High emission coating is equal to or greater than 0.9. This HEB preferably consists of the substances Cr 2 O 3 or Fe 2 O 3 or of 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 wt .-% is.
[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] Sie zeichnen sich dadurch aus, dass die Zufuhr der erforderlichen Ener- gie zu einem Teil direkt aus der Verbrennung der leichtflüchtigen Kohlebestandteile im Gasraum oberhalb des Kohlekuchens oder der Kohleschüttung genommen wird. Ein weiterer Teil der Verkokungsenergie wird über die rückseitig durch Rauchgase beheizten Wände und den Kammerboden in den Kohlekuchen oder die Kohleschüttung eingetragen.[0003] They are characterized by the fact that the supply of the required energy is taken in part directly from the combustion of the volatile coal constituents in the gas space above the coal cake or the coal bed. Another part of the coking energy is introduced into the coal cake or the coal bed via the walls heated by flue gases at the back and the chamber floor.
[0004] Aufgrund der direkten Energieeinwirkung ist das Dickenwachstum der oberen Schicht an ausgegartem Koks am schnellsten. Die ausgegarten Schichten, welche parallel zu den Wänden oder von unten und parallel zum Kammerboden wachsen, weisen daher am Ende der Garungszeit eine geringere Mächtigkeit als die obere Schicht auf.Due to the direct energy action, the thickness growth of the upper layer of ausgegartem coke is the fastest. The ausgegarden layers, which grow parallel to the walls or from below and parallel to the chamber bottom, therefore, at the end of the cooking time to a lesser thickness than the upper layer.
[0005] Es sind aus dem Stand der Technik unterschiedliche Wege bekannt, um die Garungszeit der Kohle zu beschleunigen. Die Erhöhung der Temperatur in der Verkokungskammer, welche eine Beschleunigung des Verkokungsvorgangs bewirken würde, führt zu einem höheren Verlust an Wertstoff und ist aus Werkstoffgründen in der Regel nicht möglich. Es wurde daher vorrangig versucht, den indirekten Wärmetransport durch die Wände und den Kammerboden zu verbessern, wie dies beispielsweise in DE 10 2006 026521 beschrieben ist.There are known from the prior art, different ways to accelerate the cooking time of the coal. The increase in the temperature in the coking chamber, which would cause an acceleration of the coking process, leads to a higher loss of valuable material and is usually not possible for material reasons. It was therefore a priority to improve the indirect heat transfer through the walls and the chamber bottom, as described for example in DE 10 2006 026521.
[0006] Die EP 0 742 276 B1 beschreibt für die baulich unterschiedlichen Horizontalkammeröfen ein Verfahren zur Verbesserung des Wärmedurchgangs, von den parallelen Heizzügen, außerhalb des eigentlichen Ofenraums in die Kohleschüttung hinein. Hierbei werden die Oberflächen der zur Koksofenkammer parallelen Heizzüge beschichtet, so dass diese als Schwarzer Körper wirken und der Wärmetransport durch die Wand verbessert ist.EP 0 742 276 B1 describes, for the structurally different horizontal chamber furnaces, a method for improving the heat transfer, from the parallel heating cables outside the actual furnace chamber into the coal charge. Here, the surfaces of the coke oven chamber parallel heating cables are coated so that they act as a black body and the heat transport through the wall is improved.
[0007] Es besteht aber nach wie vor Bedarf, die Verkokungszeit zu verringern und damit die Wirtschaftlichkeit des Verfahrens zu verbessern.However, there is still a need to reduce the coking time and thus to improve the efficiency of the process.
[0008] 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 mindestens ein Teil der Innenwände der Verkokungskammer als sekundäre Heizfläche ausgebildet sind, indem diese mit einer Hochemissionsbeschichtung (HEB) beschichtet sind, wobei der Emissionsgrad dieser Hochemissionsbeschichtung gleich oder größer als 0,9 ist.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, vertical down (down corner) ducts, and bottom ducts for heating the coking chamber horizontally and below the coking chamber, at least part of the interior walls of the coking chamber being a secondary heating surface by being coated with a high emissivity coating (US Pat. HEB) are coated, wherein the emissivity of this high emission coating is equal to or greater than 0.9.
[0009] 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.
[0010] 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. [0011] Durch die HEB wird die Strahlungssituation im Koksofenraum erheblich verbessert und der schnelle von oben nach unten ablaufende Verkokungsvorgang weiter beschleunigt.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. By the HEB, the radiation situation in the coke oven space is significantly improved and the fast running from top to bottom coking continues to accelerate.
[0012] 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 stofflichen Zusammensetzung beschichtet sind, wodurch der indirekte Wärmetransport durch den Boden der Koksofenkammer verbessert wird.The coke oven can be further improved to the effect 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, whereby the indirect heat transfer through the bottom of the coke oven chamber is improved.
[0013] Eine weiter verbesserte Variante besteht darin, dass in dem Gasraum, welcher im bestimmungsgemäßen Betrieb des Koksofens nicht für die Befüllung mit Feststoff vorgesehen ist, ein oder mehrere Heizelemente, so genannte tertiäre Heizelemente, angeordnet sind, welche ebenfalls ganz oder teilweise mit der oben beschriebenen HEB beschichtet sind. Alternativ können diese tertiären Heizelemente auch ganz oder teilweise aus den die HEB bildenden Stoffen bestehen oder gebildet sein.A further improved variant is that in the gas space, which is not provided in the normal operation of the coke oven for the filling with solid, one or more heating elements, so-called tertiary heating elements are arranged, which also completely or partially with the HEB described above are coated. Alternatively, these tertiary heating elements may also consist entirely or partially of the substances forming the HEB or be formed.
[0014] Die tertiären Heizelemente können dabei eine beliebige Form aufweisen und sind idealerweise als hängende Rippen oder hängende Wände geformt. Die tertiären Heizelemente können dahingehend weiter verbessert werden, indem diese Öffnungen eine teilweise offene Struktur aufweisen.The tertiary heating elements can have any shape and are ideally shaped as hanging ribs or hanging walls. The tertiary heating elements can be further improved in that these openings have a partially open structure.
[0015] Grundsätzlich können die tertiären 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 tertiary heating elements can be attached in any way 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.
[0016] Eine weiter verbesserte Ausführungsvariante des Koksofens besteht darin, die Gasführung an die Positionierung der tertiären Heizelemente anzupas- sen. Somit wird die bei einer abschnittsweisen Unterteilung der Verkokungs- kammer durch die tertiären Heizelemente, in jeden dieser Abschnitte mindestens eine Zuluftleitung hineingeführt und aus jedem dieser Abschnitte ein oder zwei Abgaskanäle (Down Corner) herausgeführt.[0016] A further improved embodiment of the coke oven is to adapt the gas guide to the positioning of the tertiary heating elements. Thus, in the case of a sectional division of the coking Chamber through the tertiary heating elements, led into each of these sections at least one air supply line and led out of each of these sections one or two exhaust ducts (down corner).
[0017] Von der Erfindung ist auch ein Verfahren zur Herstellung von Koks unter Einsatz des vorstehende 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 process for the production of coke using the above described coke oven, 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.
[0018] Eine besonders geeignete Variante des Verfahrens sieht vor, dass die Temperatur in der Verkokungskammer während des Verkokungsvorgangs ide- alerweise im Durchschnitt 1.000 bis 1.4000C beträgt. Dabei kann diese Temperatur kurzzeitig auch überschritten werden.[0018] One particularly suitable variant of the process, that the temperature in the coking chamber during the coking IDE alerweise on average 1,000 to 1,400 0 C. This temperature can be exceeded for a short time.
[0019] Fig. 1 zeigt ein Ausführungsbeispiel den erfindungsgemäßen Koksofen in einer Schnittdarstellung. Der Koksofen 1 weist eine Ofendecke 2, Ofenwände 3 und einen Ofenboden 4 auf, welche den Ofenraum 5 umschließen. In den Ofen- räum 5 führen die gestrichelt dargestellten Luftzuführungen 6. Auf dem Ofenboden 4 ruht die eingebrachte 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.Fig. 1 shows an embodiment of the coke oven according to the invention in a sectional view. 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.
[0020] 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.
[0021] Die inneren Oberflächen des Ofenraumes 5 sind mit einer HEB verse- hen, welche zu gleichen Teilen aus Cr2θ3, Fe2Os 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 Deckenankern 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 Ofen- räum 5 zu ermöglichen und um Materialschäden aufgrund von Unterschieden im Dehnungsverhalten der Bauteile zu verhindern.[0021] The inner surfaces of the oven chamber 5 are verse- hen with a HEB, which consist of equal parts of Cr 2 θ 3, Fe 2 O 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 connected to holding elements 13, which here have the form of wall and ceiling anchors attached. In the example shown, a small, circumferential gap 14 remains between the inner wall surfaces of the furnace chamber 5, the coal bed 7 and the outer edge of the heating element 12 to allow horizontal convection in the oven cavity 5 and material damage due to differences in the expansion behavior of the components prevent.
[0022] Durch die Beschichtung aller nicht die Kohleschüttung berührender Oberflächen und die zusätzlichen ebenfalls beschichteten Strahlungsflächen, welche durch die tertiären Heizflächen in den Ofenraum eingebracht wurden, konnte die Strahlungssituation im Ofenraum wesentlich verbessert werden, was nachfolgend zu einer verkürzten Garungszeit des Kokses geführt hat. By coating all not touching the coal bed surfaces and the additional also coated radiation surfaces, which were introduced by the tertiary heating surfaces in the furnace chamber, the radiation situation in the furnace chamber could be significantly improved, which has subsequently led to a shortened cooking time of the coke.
[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 Rauchgaskanal11 flue gas duct
12 Heizelement12 heating element
13 Halteelement13 retaining element
14 Spalt 14 gap

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 die mindestens ein Teil der Innenwände der Verkokungskammer als sekundäre Heizfläche ausgebildet sind, indem diese mit einer Hochemissionsbe- schichtung (HEB) beschichtet sind, wobei der Emissionsgrad dieser Hoch- emissionsbeschichtung gleich oder größer als 0,9 ist.1. coke oven in horizontal construction (non- / heat recovery type) comprising at least one coking chamber, laterally arranged thereto 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 the at least one part the inner walls of the coking chamber are formed as a secondary heating surface by being coated with a high-emission coating (HEB), the emissivity of this high-emission coating being equal to or greater than 0.9.
2. Vorrichtung nach Anspruch 1 , 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.2. Device according to claim 1, characterized in that the HEB consists of the substances Cr 2 O 3 or Fe 2 O 3 or of 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.
3. Vorrichtung nach einem der beiden Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die HEB weiterhin SiC mit einem Anteil von mindestens 20 Gew.-% enthält.3. Device according to one of the two claims 1 or 2, characterized in that the HEB further contains SiC in a proportion of at least 20 wt .-%.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die HEB weiterhin ein oder mehrere anorganische Bindemittel enthält.4. Device according to one of claims 1 to 3, characterized in that the HEB further contains one or more inorganic binder.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Korngröße der HEB Inhaltsstoffe kleiner oder gleich 15 μm ist und idealerweise zwischen 2,5 und 10 μm liegt.5. Device according to one of claims 1 to 4, 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.
6. Vorrichtung nach einem der Ansprüche 1 bis 5, 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. 6. Device according to one of claims 1 to 5, 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.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die in dem Gasraum, welcher im bestimmungsgemäßen Betrieb des Koksofens nicht für die Befüllung mit Feststoff vorgesehen ist, ein oder mehrere Heizelemente (tertiäre Heizelemente) angeordnet sind, welche ebenfalls mit HEB gemäß einem der vorstehenden Ansprüche ganz oder teilweise beschichtet sind oder ganz oder teilweise aus diesen Stoffen bestehen.7. Device according to one of claims 1 to 6, characterized in that in the gas space, which is not provided in the intended operation of the coke oven for the filling with solid, one or more heating elements (tertiary heating elements) are arranged, which also with HEB are fully or partially coated according to any one of the preceding claims or consist entirely or partially of these substances.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die tertiären 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.Apparatus according to claim 7, characterized in that the tertiary heating elements have any shape and are ideally shaped as hanging ribs or hanging walls, which tertiary heating elements may have openings or a partially open structure.
9. Vorrichtung nach einem der Ansprüche 7 oder 8, 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.9. Device according to one of claims 7 or 8, 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.
10. Vorrichtung nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass die bei einer abschnittweisen Unterteilung der Verkokungskammer durch die tertiären Heizelemente, in jeden dieser Abschnitte eine Zuluftleitung hineinführt und aus jedem dieser Abschnitte ein oder zwei Abgaskanäle (Down- Comer) herausführt.10. Device according to one of claims 7 to 9, characterized in that the leads in a sectional division of the coking chamber by the tertiary heating elements, in each of these sections a supply air line and leads out of each of these sections one or two exhaust ducts (Down Comer).
11.Verfahren zur Herstellung von Koks unter Einsatz eines oder mehrerer Koksöfen gemäß einem der vorstehenden Ansprüche.11.A method for producing coke using one or more 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 a mean furnace chamber temperature of 1000 to 1400 0 C.
EP07801565.8A 2006-09-21 2007-08-09 Coke oven featuring improved heating properties Not-in-force EP2064303B1 (en)

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AU2007299334B2 (en) 2011-10-27
CN101517037B (en) 2014-07-09
EP2064303B1 (en) 2015-10-14
UA98119C2 (en) 2012-04-25
US20100065412A1 (en) 2010-03-18
CA2663746A1 (en) 2008-03-27
MX2009003053A (en) 2009-04-01
AP2538A (en) 2012-12-20
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NZ575265A (en) 2012-03-30
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AP2009004789A0 (en) 2009-04-30
AR062942A1 (en) 2008-12-17
RU2009114840A (en) 2010-10-27
TW200817500A (en) 2008-04-16
AU2007299334A1 (en) 2008-03-27
US20130248347A1 (en) 2013-09-26
JP2010504378A (en) 2010-02-12
DE102006045067A1 (en) 2008-04-03
WO2008034493A1 (en) 2008-03-27
BRPI0717047A2 (en) 2013-10-15
RU2447129C2 (en) 2012-04-10
CN101517037A (en) 2009-08-26
KR20090060298A (en) 2009-06-11
US8460516B2 (en) 2013-06-11
CO6170370A2 (en) 2010-06-18
ZA200901938B (en) 2010-03-31

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