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EP2491096A1 - Method and device for keeping coke furnace chambers hot when a waste heat boiler is stopped - Google Patents

Method and device for keeping coke furnace chambers hot when a waste heat boiler is stopped

Info

Publication number
EP2491096A1
EP2491096A1 EP10723496A EP10723496A EP2491096A1 EP 2491096 A1 EP2491096 A1 EP 2491096A1 EP 10723496 A EP10723496 A EP 10723496A EP 10723496 A EP10723496 A EP 10723496A EP 2491096 A1 EP2491096 A1 EP 2491096A1
Authority
EP
European Patent Office
Prior art keywords
coke oven
waste heat
flue gas
gas
heat boiler
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Withdrawn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
EP10723496A
Other languages
German (de)
French (fr)
Inventor
Hans-Joachim Reichelt
Helmut Schulte
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
ThyssenKrupp 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 ThyssenKrupp Uhde GmbH filed Critical ThyssenKrupp Uhde GmbH
Publication of EP2491096A1 publication Critical patent/EP2491096A1/en
Withdrawn legal-status Critical Current

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
    • 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
    • C10B21/00—Heating of coke ovens with combustible gases
    • C10B21/04—Heating of coke ovens with combustible gases with rich gas
    • 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
    • C10B21/12—Burners
    • 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
    • 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
    • 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
    • C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
    • C10B49/02—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Definitions

  • the invention relates to a method for keeping hot coke oven chambers during standstill of a waste heat boiler, said waste heat boiler for the production of steam or hot water during operation of at least one coke oven chamber, and the method allows a warming coke oven chambers of a coke oven battery, wherein the coke oven chambers instead of being kept warm by coking by externally heated burners whose pollutant emissions are low due to the type of heating, so that during standstill, a reduced emission of pollutants takes place.
  • the invention also relates to a device for keeping hot coke oven chambers during standstill of a waste heat boiler, said device containing coke oven chambers comprising at least one externally heated burner, wherein under externally heated, in particular a gas or oil-fired burner is to be understood.
  • waste heat boiler When operating coke oven chambers, it is necessary to subject the so-called waste heat boiler from time to time or at regular intervals of a revision or cleaning.
  • the waste heat boiler is used in normal operation to cool the flue gases from at least one coke oven chamber and to recover steam or hot water from the heat thus obtained.
  • recuperators and the associated technology as a "heat recovery technique.”
  • heat recovery technique the associated technology
  • the hot flue gases which are often loaded with a considerable amount of pollutants, have to be discharged into the atmosphere without being cleaned.Cooling of the coke oven chamber for the purpose of revision or cleaning will damage the refractory structure of the coke oven chambers and is therefore not performed.
  • Coke oven chambers are often grouped together because the cycle of loading, coking and emptying of coke oven chambers is not continuous and is therefore distributed among several coke oven chambers. Groups of coke oven chambers are also referred to as coke oven chamber banks.
  • Typical coke oven chambers of the type "Heat- Recovery" use the coking gas obtained during coking for combustion and thus for generating heat.
  • the thus obtained completely burnt flue gas which can be taken from the combustion chamber, is guided into a manifold arranged transversely to the coke oven chambers, which receives the hot flue gases from each coke oven chamber and leads into the one or more waste heat boilers via a delivery line.
  • the waste heat boilers cool the flue gas by indirect heat exchange to produce steam or hot water, so that a cooled exhaust gas is obtained. This is often passed through an emission control system. Downstream of the exhaust gas purification is a device for extracting and generating a negative pressure in order to suck the combustion air into the furnace chambers. If the waste heat boiler is no longer used to cool the flue gas, the emission control system is no longer available.
  • the US 4045299 A describes an arrangement of coke oven chambers with lateral coke oven chamber walls, frontal coke oven chamber doors, loading openings in the ceiling and a coke oven chamber floor on which the coal cake is loaded for coking.
  • Below the floor are secondary air soles, which communicate via channels in the sides of the coke oven chamber with the gas space above the coke cake.
  • the secondary air soles communicate with an afterburner chamber equipped with externally heated burners, whereby unburned residual gases in the coking gas can be completely burned before being placed in the recuperator.
  • the afterburner chamber may, if necessary, be supplied with coking gas from the gas space above the coke cake, so that the flue gas is always completely burned and provided with a temperature suitable for flue gas combustion.
  • the construction is to ensure complete combustion at a minimum temperature level, but not to keep it warm.
  • Coke oven chambers are usually constructed of materials that must withstand high temperatures but, due to their properties, can be damaged during cooling. Certain materials can change their properties at lower temperatures so that they become unusable for the desired purpose.
  • the invention solves this problem by a method which ensures the keeping warm of coke oven chambers during the standstill of a waste heat boiler by providing the coke oven chambers with at least one externally heated burner, wherein the collecting line in the gas flow direction before the flue gas enters the waste heat boiler is equipped with a shut-off device, and this manifold is further equipped with a gas flow direction in front of the shut-off device vertically upwardly running flue gas fireplace.
  • the coke oven chambers can be further heated after emptying, without the waste heat boiler must be used, while at the same time a harmful cooling and reheating of the coke oven chambers is avoided.
  • the process according to the invention makes it possible to operate coke oven chambers of the "heat recovery" type, which are arranged in groups as so-called coke oven benches
  • the coke oven chambers can be arranged as desired within the coke oven banks
  • any number of coke oven chambers can be arranged within a coke oven bank, for example, two coke oven chambers which are arranged in a coke oven bank in a mirror image, and the number of waste heat boilers can in principle be arbitrary
  • the burners can be arranged simply or repeatedly per Koksofensch, preferably one burner per Koksofensch is installed.
  • the burners are typically simply located in each coke oven chamber. In a typical embodiment, in each coke oven chamber, these heat the gas space above the coke cake of an empty coke oven chamber in operation there.
  • the burners are preferably operated by natural gas, by a hydrocarbon-containing fuel gas or by a liquid fuel.
  • a device for keeping coke oven chambers warm during standstill of a waste heat boiler, comprising • at least two coke oven chambers, which are combined to form a coke oven bank,
  • At least one collecting line which receives the hot flue gases from the combustion of the coking gas, and which opens into a common delivery line,
  • An exhaust pipe which carries out the cooled exhaust gas from the waste heat boiler, and this exhaust pipe is equipped with a shut-off device for flue gas,
  • the coke oven chambers are equipped with at least one externally heated burner
  • the collecting line in the gas flow direction is equipped with a shut-off device before the flue gas enters the waste heat boiler, and this collecting line continues with a gas flow direction in front of the
  • Shut-off device is equipped vertically upward exhaust chimney.
  • the flue gas fireplace leads from the manifold into the atmosphere and serves to give the flue gas from the burners in the atmosphere. This is arranged in an advantageous embodiment in front of the execution line in the waste heat boiler.
  • the flue gas chimney is advantageously equipped with a shut-off device. This locks the flue gas fireplace, for example, in normal operation against the atmosphere.
  • the waste heat boiler may be of any kind. This is connected on the flue gas side with the supply line for flue gas, and on the exhaust side with the execution line for exhaust. For indirect heat exchange, this is provided with a supply line for feed water and a discharge line for steam or hot water.
  • the waste heat boiler on the flue gas side with a shut-off device.
  • a shut-off device are, for example, flaps, slides or shut-off plates.
  • the waste heat boiler is provided in a preferred embodiment both on the flue gas side and on the exhaust side with a shut-off device.
  • the device according to the invention preferably contains an emission control system.
  • This can be of any kind.
  • the device according to the invention can be provided, for example, with a suction fan for the cooled exhaust gas, by means of which a negative pressure can be generated. This is used to control the negative pressure in the coke oven chamber.
  • the suction fan is preferably installed behind the exhaust gas purification system. There may be an exhaust stack behind the emission control system.
  • Claimed is in particular a method for keeping hot coke oven chambers during standstill of a waste heat boiler, wherein
  • the coke oven chambers are kept warm during the standstill period with an externally fired burner, so that a hot flue gas, which comes from the flue gas of the burner, is also provided during the standstill period, and
  • the burners can be of any kind. These can be heated, for example, with natural gas. But it is also possible, this with another
  • the fuels are preferably hydrocarbon-containing.
  • the inventive device and the inventive method have the advantage of avoiding excessive emission of pollutants during the standstill of waste heat from coke oven benches.
  • each coke oven chamber (2) can be equipped with a burner (2a) be equipped, which heats the respective coke oven chamber.
  • Each coke oven chamber (2) is provided via a flue gas duct (3) with a manifold (4) for flue gas, through which the manifold (4) from the flue gas ducts (3) is supplied with flue gases.
  • the collecting line (4) opens into a common discharge line, which in turn flows into the waste heat boiler (5).
  • (5) is a vertically upwardly leading flue gas fireplace (6), which can be shut off via a shut-off device (6a). Also, the discharge line (7) can be shut off via a shut-off device (7a) in the gas flow before entering the waste heat boiler (5).
  • the discharge line (7) finally leads into a waste heat boiler (5) which is supplied with feed water (5a) and generates steam or hot water (5b) via indirect heat exchange. This gives a cooled exhaust gas.
  • This is guided via a discharge line for exhaust (8) in an exhaust manifold (9).
  • the discharge pipe for exhaust gas (8) is also provided with a shut-off device for the discharge pipe for exhaust gas (8a).
  • the exhaust manifold (9) finally leads into an emission control system (10). Behind the exhaust gas purification system (10) is a fan (11), which generates a negative pressure.
  • the purified exhaust gas is fed into an exhaust stack (12).
  • each coke oven chamber (2) in the gas space above the coke cake (2b) burner (2a) the empty coke oven chambers (2) after emptying the coke oven chamber in the standstill period and supply with hot flue gases.
  • the shut-off device (7a) in front of the waste heat boiler (5) is closed and the shut-off device (6a) is opened in the flue gas fireplace.
  • the hot flue gas from the burners (2a) which is low in pollutants, is discharged into the atmosphere.
  • the coke oven chambers (2) thus do not cool, while at the same time the waste heat boiler (5) can be revised and / or cleaned.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Coke Industry (AREA)
  • Incineration Of Waste (AREA)
  • Chimneys And Flues (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention relates to a method for keeping coke furnace chambers hot when a waste heat boiler is stopped, the coke furnace chambers being kept hot during the stoppage after the evacuation by means of externally heated burners, producing a flue gas low in pollutants such that the waste heat boilers that, during normal operation, cool the flue gases from the coke furnace benches and use said gases to produce water vapour, can be stopped and subjected to a revision, a flue gas low in pollutants being obtained by the burner operation of the waste heat boiler and directly guided back into the atmosphere. The invention also relates to a device for keeping coke furnace chambers hot, said device especially comprising: a coke furnace chamber bench, a flue gas collection line, a flue gas chimney, a waste heat boiler, a waste gas collection line and a waste gas purifying system, the flue gas chimney and the waste heat boiler being stoppable on the flue gas side and the waste gas side.

Description

Verfahren und Vorrichtung zur Warmhaltung von Koksofenkammern während des Stillstandes eines Abhitzekessels  Method and device for keeping warm coke oven chambers during standstill of a waste heat boiler
[0001] Die Erfindung betrifft ein Verfahren zur Warmhaltung von Koksofenkammern während des Stillstandes eines Abhitzekessels, wobei dieser Abhitzekessel zur Erzeugung von Dampf oder heißem Wasser während des Betriebes mindestens einer Koksofenkammer dient, und das Verfahren eine Warmhaltung der Koksofenkammern einer Koksofenbatterie gestattet, wobei die Koksofenkammern statt durch Verkokung durch fremdbeheizte Brenner warmgehalten werden, deren Schadstoffausstoß durch die Art der Beheizung gering ist, so dass während des Stillstandes ein verringerter Ausstoß an Schadstoffen erfolgt. Die Erfindung betrifft auch eine Vorrichtung zur Warmhaltung von Koksofenkammern während des Stillstandes eines Abhitzekessels, wobei diese Vorrichtung Koksofenkammern enthält, die mindestens einen fremdbeheizten Brenner umfassen, wobei unter fremdbeheizt insbesondere ein gas- oder ölbeheizter Brenner zu verstehen ist. [0002] Beim Betrieb von Koksofenkammern ist es notwendig, den sogenannten Abhitzekessel von Zeit zu Zeit oder in regelmäßigen Abständen einer Revision oder Reinigung zu unterziehen. Der Abhitzekessel dient im Normalbetrieb dazu, die Rauchgase aus mindestens einer Koksofenkammer zu kühlen und aus der so gewonnenen Wärme Dampf oder heißes Wasser zu gewinnen. Häufig werden diese Abhitzekessel auch als Rekuperatoren bezeichnet und die damit verbundene Technik als „Heat- Recovery-Technik". Bei einer Revision oder Reinigung müssen diese jedoch stillstehen und stehen daher nicht mehr zur Kühlung des Rauchgases zur Verfügung. Häufig wird der Verkokungsprozess in der Koksofenkammer fortgesetzt, so dass die heißen Rauchgase, die häufig mit einer erheblichen Menge an Schadstoffen beladen sind, un- gereinigt in die Atmosphäre abgegeben werden müssen. Dies ist unerwünscht. Eine Herunterkühlung der Koksofenkammer zum Zwecke der Revision oder Reinigung führt zur Beschädigung des Feuerfestaufbaus der Koksofenkammern und wird aus diesem Grunde nicht durchgeführt. The invention relates to a method for keeping hot coke oven chambers during standstill of a waste heat boiler, said waste heat boiler for the production of steam or hot water during operation of at least one coke oven chamber, and the method allows a warming coke oven chambers of a coke oven battery, wherein the coke oven chambers instead of being kept warm by coking by externally heated burners whose pollutant emissions are low due to the type of heating, so that during standstill, a reduced emission of pollutants takes place. The invention also relates to a device for keeping hot coke oven chambers during standstill of a waste heat boiler, said device containing coke oven chambers comprising at least one externally heated burner, wherein under externally heated, in particular a gas or oil-fired burner is to be understood. When operating coke oven chambers, it is necessary to subject the so-called waste heat boiler from time to time or at regular intervals of a revision or cleaning. The waste heat boiler is used in normal operation to cool the flue gases from at least one coke oven chamber and to recover steam or hot water from the heat thus obtained. Often, these heat recovery boilers are also referred to as recuperators and the associated technology as a "heat recovery technique." However, during a revision or cleaning they must be stationary and are therefore no longer available for cooling the flue gas This means that the hot flue gases, which are often loaded with a considerable amount of pollutants, have to be discharged into the atmosphere without being cleaned.Cooling of the coke oven chamber for the purpose of revision or cleaning will damage the refractory structure of the coke oven chambers and is therefore not performed.
[0003] Man ist deshalb bestrebt, ein Verfahren zu finden, mit dem sich die Koks- ofenkammern einer Koksofenbank warmhalten lassen, ohne dass es zu einem unerwünschten Ausstoß an schadstoffhaltigen Verkokungsgasen kommt. Koksofenkammern werden häufig zu Gruppen zusammengefasst, da der Zyklus der Beladung, Verkokung und Entleerung von Koksofenkammern nicht kontinuierlich ist und deshalb auf mehrere Koksofenkammern verteilt wird. Gruppen von Koksofenkammern werden auch als Koksofenkammerbänke bezeichnet. Typische Koksofenkammern vom Typ„Heat- Recovery" nutzen das bei der Verkokung erhaltene Verkokungsgas zur Verbrennung und damit zur Erzeugung von Wärme. [0003] It is therefore desirable to find a method by which the coke oven chambers of a coke oven bank can be kept warm without resulting in undesired emission of polluting coking gases. Coke oven chambers are often grouped together because the cycle of loading, coking and emptying of coke oven chambers is not continuous and is therefore distributed among several coke oven chambers. Groups of coke oven chambers are also referred to as coke oven chamber banks. Typical coke oven chambers of the type "Heat- Recovery "use the coking gas obtained during coking for combustion and thus for generating heat.
[0004] Das so erhaltene vollständig verbrannte Rauchgas, welches aus dem Verbrennungsraum entnommen werden kann, wird in eine quer zu den Koksofenkam- mern gelegene Sammelleitung geführt, welche die heißen Rauchgase aus jeder Koksofenkammer aufnimmt und über eine Ausführleitung in den oder die Abhitzekessel führt. Die Abhitzekessel kühlen das Rauchgas durch indirekten Wärmetausch zur Erzeugung von Dampf oder heißem Wasser ab, so dass man ein gekühltes Abgas erhält. Dieses wird häufig durch eine Abgasreinigungsanlage geführt. Der Abgasreinigung nachgeschaltet ist eine Vorrichtung zur Absaugung und Erzeugung eines Unterdrucks, um die Verbrennungsluft in die Ofenkammern einzusaugen. Wird der Abhitzekessel nicht mehr zur Kühlung des Rauchgases genutzt, steht auch die Abgasreinigungsanlage nicht mehr zur Verfügung. Beim Stillstand der Abhitzekessel werden die Koksofenkammern jedoch aus den genannten Gründen weiterbetrieben und das Rauchgas über einen direkt zuschaltbaren Rauchgaskamin abgeleitet, so dass eine erhebliche Menge an Schadstoffen in die Atmosphäre gelangt, die in dem vollständig verbrannten Verkokungsgas enthalten sind. [0004] The thus obtained completely burnt flue gas, which can be taken from the combustion chamber, is guided into a manifold arranged transversely to the coke oven chambers, which receives the hot flue gases from each coke oven chamber and leads into the one or more waste heat boilers via a delivery line. The waste heat boilers cool the flue gas by indirect heat exchange to produce steam or hot water, so that a cooled exhaust gas is obtained. This is often passed through an emission control system. Downstream of the exhaust gas purification is a device for extracting and generating a negative pressure in order to suck the combustion air into the furnace chambers. If the waste heat boiler is no longer used to cool the flue gas, the emission control system is no longer available. At standstill of the waste heat boiler, however, the coke oven chambers continue to operate for the reasons mentioned and the flue gas is discharged via a directly switchable flue gas fireplace, so that a significant amount of pollutants is released into the atmosphere, which are contained in the completely burned coking gas.
[0005] Die US 4045299 A beschreibt eine Anordnung von Koksofenkammern mit seitlichen Koksofenkammerwänden, frontalen Koksofenkammertüren, Beladeöffnungen in der Decke und einem Koksofenkammerboden, auf den der Kohlekuchen zur Verkokung beladen wird. Unterhalb des Bodens befinden sich Sekundärluftsohlen, die über Kanäle in den Seiten der Koksofenkammer mit dem Gasraum über dem Kokskuchen in Verbindung stehen. Die Sekundärluftsohlen wiederum stehen mit einer Nachverbrennungskammer in Verbindung, die mit fremdbeheizten Brennern ausgerüstet ist, wo- durch unverbrannte Restgase in dem Verkokungsgas vollständig verbrannt werden können, bevor diese in den Rekuperator gegeben werden. Die Nachverbrennungskammer kann bedarfsweise mit Verkokungsgas aus dem Gasraum über dem Kokskuchen versorgt werden, so dass das Rauchgas stets vollständig verbrannt wird und mit einer zur Rauchgasverbrennung geeigneten Temperatur versehen ist. Die Konstruktion dient jedoch der Sicherstellung der vollständigen Verbrennung bei einem Mindest- Temperaturniveau, nicht aber der Warmhaltung. The US 4045299 A describes an arrangement of coke oven chambers with lateral coke oven chamber walls, frontal coke oven chamber doors, loading openings in the ceiling and a coke oven chamber floor on which the coal cake is loaded for coking. Below the floor are secondary air soles, which communicate via channels in the sides of the coke oven chamber with the gas space above the coke cake. The secondary air soles, in turn, communicate with an afterburner chamber equipped with externally heated burners, whereby unburned residual gases in the coking gas can be completely burned before being placed in the recuperator. The afterburner chamber may, if necessary, be supplied with coking gas from the gas space above the coke cake, so that the flue gas is always completely burned and provided with a temperature suitable for flue gas combustion. The construction, however, is to ensure complete combustion at a minimum temperature level, but not to keep it warm.
[0006] Das Problem, das sich beim Stillstand von Abhitzekesseln ergibt, ist die Auskühlung der Koksofenkammern. Koksofenkammern sind für gewöhnlich aus Materialien konstruiert, die hohen Temperaturen standhalten müssen, bedingt durch ihre Ei- genschaften aber beim Auskühlen beschädigt werden können. Bestimmte Materialien können bei niedrigeren Temperaturen ihre Eigenschaften verändern, so dass diese für den erwünschten Zweck unbrauchbar werden. The problem that arises at standstill of waste heat boilers is the cooling of the coke oven chambers. Coke oven chambers are usually constructed of materials that must withstand high temperatures but, due to their properties, can be damaged during cooling. Certain materials can change their properties at lower temperatures so that they become unusable for the desired purpose.
[0007] Es besteht deshalb die Aufgabe, eine Vorrichtung zur Verfügung zu stellen, die eine Mindesttemperatur der Koksofenkammern während des Stillstandes der Abhit- zekessel gewährleistet, ohne dass es zu einer übermäßigen Emission von Rauchgasen in die Atmosphäre kommt. Da die Abgasreinigungsanlage bei einem Stillstand der Abhitzekessel nicht mehr zur Verfügung steht, soll dennoch eine Möglichkeit vorhanden sein, die Koksofenkammern auf einer Mindesttemperatur zu halten, ohne dass es zu einer Emission von Rauch- oder Abgasen durch eine weitergehende Verkokung kommt. Eine Umgehung des Abhitzekessels (ein sogenannter Bypass) ist nicht möglich, weil die Rauchgase in dieser Zeit ungekühlt in die Rauchgasreinigungsanlage gegeben würden. Dies ist jedoch auch technischen Gründen unerwünscht oder nicht möglich. Auch will man eine Emission ungereinigter Gase möglichst vermeiden. [0007] There is therefore the object of providing a device which ensures a minimum temperature of the coke oven chambers during the standstill of the waste heat boiler, without resulting in excessive emission of flue gases into the atmosphere. Since the exhaust gas purification system is no longer available when the waste heat boiler is at a standstill, there should nevertheless be a possibility of keeping the coke oven chambers at a minimum temperature, without there being any emission of smoke or exhaust gases due to further coking. A bypass of the waste heat boiler (a so-called bypass) is not possible because the flue gases would be given in this time uncooled in the flue gas cleaning system. However, this is also undesirable or impossible for technical reasons. Also one wants to avoid emission of uncleaned gases as far as possible.
[0008] Die Erfindung löst diese Aufgabe durch ein Verfahren, welches die Warm- haltung von Koksofenkammern während des Stillstandes eines Abhitzekessels dadurch gewährleistet, dass die Koksofenkammern mit jeweils mindestens einem fremdbeheizten Brenner ausgestattet sind, wobei die Sammelleitung in Gasflussrichtung vor dem Eintritt des Rauchgases in den Abhitzekessel mit einer Absperrvorrichtung ausgerüstet ist, und diese Sammelleitung weiterhin mit einem in Gasflussrichtung vor der Ab- Sperrvorrichtung vertikal aufwärts ausführenden Rauchgaskamin ausgestattet ist. Auf diese Weise können die Koksofenkammern nach der Entleerung weiter beheizt werden, ohne dass die Abhitzekessel genutzt werden müssen, während gleichzeitig ein schädliches Auskühlen und Wiederaufheizen der Koksofenkammern vermieden wird. [0008] The invention solves this problem by a method which ensures the keeping warm of coke oven chambers during the standstill of a waste heat boiler by providing the coke oven chambers with at least one externally heated burner, wherein the collecting line in the gas flow direction before the flue gas enters the waste heat boiler is equipped with a shut-off device, and this manifold is further equipped with a gas flow direction in front of the shut-off device vertically upwardly running flue gas fireplace. In this way, the coke oven chambers can be further heated after emptying, without the waste heat boiler must be used, while at the same time a harmful cooling and reheating of the coke oven chambers is avoided.
[0009] Mit dem erfindungsgemäßen Verfahren lassen sich Koksofenkammern vom Typ„Heat-Recovery" betreiben. Diese sind in Gruppen zu sogenannten Koksofenbänken angeordnet. Die Koksofenkammern können innerhalb der Koksofenbänke beliebig angeordnet sein. So ist es möglich, eine Koksofenbank mit dem erfindungsgemäßen Verfahren zu betreiben, in dem nur zwei Koksofenkammern innerhalb einer Koksofenbank angeordnet sind. Es können jedoch beliebig viele Koksofenkammern innerhalb einer Koksofenbank angeordnet sein. Beispielhaft können dies zwei Koksofenkammern sein, die spiegelbildlich in einer Koksofenbank angeordnet sind. Auch die Zahl der Abhitzekessel kann im Prinzip beliebig sein. Diese können in beliebiger Weise mit den Koksofenbänken oder Koksofenkammern verknüpft sein. [0010] Die Brenner können dabei einfach oder mehrfach pro Koksofenkammer angeordnet sein, wobei bevorzugt ein Brenner pro Koksofenkammer installiert wird. Die Brenner sind typischerweise einfach in jeder Koksofenkammer angeordnet. In einer typischen Ausführungsform heizen diese in jeder Koksofenkammer den Gasraum über dem sich im Betrieb dort befindenden Kokskuchen einer leeren Koksofenkammer. Die Brenner werden bevorzugt durch Erdgas, durch ein kohlenwasserstoffhaltiges Brenngas oder durch einen flüssigen Brennstoff betrieben. The process according to the invention makes it possible to operate coke oven chambers of the "heat recovery" type, which are arranged in groups as so-called coke oven benches The coke oven chambers can be arranged as desired within the coke oven banks However, any number of coke oven chambers can be arranged within a coke oven bank, for example, two coke oven chambers which are arranged in a coke oven bank in a mirror image, and the number of waste heat boilers can in principle be arbitrary These can be linked in any way with the coke oven benches or coke oven chambers. The burners can be arranged simply or repeatedly per Koksofenkammer, preferably one burner per Koksofenkammer is installed. The burners are typically simply located in each coke oven chamber. In a typical embodiment, in each coke oven chamber, these heat the gas space above the coke cake of an empty coke oven chamber in operation there. The burners are preferably operated by natural gas, by a hydrocarbon-containing fuel gas or by a liquid fuel.
[0011] Beansprucht wird insbesondere eine Vorrichtung zur Warmhaltung von Koksofenkammern während des Stillstandes eines Abhitzekessels, umfassend • mindestens zwei Koksofenkammern, die zu einer Koksofenbank zu- sammengefasst werden, A device is particularly claimed for keeping coke oven chambers warm during standstill of a waste heat boiler, comprising • at least two coke oven chambers, which are combined to form a coke oven bank,
• mindestens eine Sammelleitung, die die heißen Rauchgase aus der Verbrennung des Verkokungsgases aufnimmt, und die in eine gemeinsame Ausführleitung mündet,  At least one collecting line, which receives the hot flue gases from the combustion of the coking gas, and which opens into a common delivery line,
• einen Abhitzekessel, der aus dieser Ausführleitung mit heißen Rauchgasen versorgt wird, und der mit mindestens einer Zuführleitung für Kesselspeisewasser und einer Abführleitung für Dampf oder heißem Wasser und einer Ausführleitung für gekühltes Abgas ausgestattet ist, wobei eine indirekte Wärmeübertragung von den heißen Rauchgasen aus der Verbrennung des Verkokungsgases an das Kühlmedium Kesselspeisewasser ermöglicht wird,  A waste heat boiler supplied with hot flue gases from said delivery line and equipped with at least one feed pipe for boiler feed water and a steam or hot water discharge pipe and a cooled exhaust gas discharge line, with indirect heat transfer from the hot flue gases from the combustion the coking gas is allowed to the cooling medium boiler feed water,
• eine Abgasleitung, die das gekühlte Abgas aus dem Abhitzekessel ausführt, und diese Abgasleitung mit einer Absperrvorrichtung für Rauchgas ausgerüstet ist,  An exhaust pipe which carries out the cooled exhaust gas from the waste heat boiler, and this exhaust pipe is equipped with a shut-off device for flue gas,
und welche dadurch gekennzeichnet ist, dass  and which is characterized in that
• die Koksofenkammern mit mindestens einem fremdbeheizten Brenner ausgestattet sind, und  • the coke oven chambers are equipped with at least one externally heated burner, and
• die Sammelleitung in Gasflussrichtung vor dem Eintritt des Rauchgases in den Abhitzekessel mit einer Absperrvorrichtung ausgerüstet ist, und diese Sammelleitung weiterhin mit einem in Gasflussrichtung vor der • the collecting line in the gas flow direction is equipped with a shut-off device before the flue gas enters the waste heat boiler, and this collecting line continues with a gas flow direction in front of the
Absperrvorrichtung vertikal aufwärts ausführenden Abgaskamin ausgestattet ist. [0012] Der Rauchgaskamin führt von der Sammelleitung aus in die Atmosphäre und dient dazu, das Rauchgas aus den Brennern in die Atmosphäre zu geben. Dieser ist in einer vorteilhaften Ausführungsform vor der Ausführleitung in die Abhitzekessel angeordnet. Der Rauchgaskamin ist vorteilhaft mit einer Absperrvor- richtung ausgestattet. Diese sperrt den Rauchgaskamin beispielsweise im Normalbetrieb gegen die Atmosphäre ab. Shut-off device is equipped vertically upward exhaust chimney. The flue gas fireplace leads from the manifold into the atmosphere and serves to give the flue gas from the burners in the atmosphere. This is arranged in an advantageous embodiment in front of the execution line in the waste heat boiler. The flue gas chimney is advantageously equipped with a shut-off device. This locks the flue gas fireplace, for example, in normal operation against the atmosphere.
[0013] Der Abhitzekessel kann beliebig geartet sein. Dieser ist auf der Rauchgasseite mit der Zuführleitung für Rauchgas verbunden, und auf der Abgasseite mit der Ausführleitung für Abgas. Zum indirekten Wärmetausch ist dieser mit einer Zu- führleitung für Speisewasser und einer Abführleitung für Dampf oder Heißwasser versehen. The waste heat boiler may be of any kind. This is connected on the flue gas side with the supply line for flue gas, and on the exhaust side with the execution line for exhaust. For indirect heat exchange, this is provided with a supply line for feed water and a discharge line for steam or hot water.
[0014] Zur Ausführung der Erfindung ist es notwendig, den Abhitzekessel auf der Rauchgasseite mit einer Absperrvorrichtung zu versehen. Dies sind beispielsweise Klappen, Schieber, oder Absperrbleche. Der Abhitzekessel ist in einer be- vorzugten Ausführungsform sowohl auf der Rauchgasseite als auch auf der Abgasseite mit einer Absperrvorrichtung versehen. To carry out the invention, it is necessary to provide the waste heat boiler on the flue gas side with a shut-off device. These are, for example, flaps, slides or shut-off plates. The waste heat boiler is provided in a preferred embodiment both on the flue gas side and on the exhaust side with a shut-off device.
[0015] Die erfindungsgemäße Vorrichtung enthält bevorzugt eine Abgasreinigungsanlage. Diese kann beliebig geartet sein. Die erfindungsgemäße Vorrichtung kann beispielhaft mit einem Saugventilator für das gekühlte Abgas versehen sein, durch den ein Unterdruck erzeugt werden kann. Dieser wird zur Kontrolle des Unterdrucks in der Koksofenkammer genutzt. Der Saugventilator ist bevorzugt hinter der Abgasreinigungsanlage installiert. Hinter der Abgasreinigungsanlage kann sich ein Abgaskamin befinden. The device according to the invention preferably contains an emission control system. This can be of any kind. The device according to the invention can be provided, for example, with a suction fan for the cooled exhaust gas, by means of which a negative pressure can be generated. This is used to control the negative pressure in the coke oven chamber. The suction fan is preferably installed behind the exhaust gas purification system. There may be an exhaust stack behind the emission control system.
[0016] Beansprucht wird auch das erfindungsgemäße Verfahren, mit dem die Koksofenkammern während des Stillstandes von Koksofenkammern warmgehalten werden. Claimed is also the inventive method with which the coke oven chambers are kept warm during the standstill of coke oven chambers.
[0017] Beansprucht wird insbesondere ein Verfahren zur Warmhaltung von Koksofenkammern während des Stillstandes eines Abhitzekessels, wobei Claimed is in particular a method for keeping hot coke oven chambers during standstill of a waste heat boiler, wherein
• mindestens zwei Koksofenkammern zu einer Koksofenbank vom Typ „Heat-Recovery" zusammengefasst werden, und zwischen einer Betriebsperiode und einer Stillstandsperiode der Koksofenbank unterschieden wird, und • während der Betriebsperiode das Verkokungsgas dazu genutzt wird, durch Verbrennung mit Luft den Kokskuchen zu erhitzen und die zur Verkokung notwendige Wärme zu liefern, so dass ein heißes Rauchgas entsteht, welches in einen Abhitzekessel geführt wird, wo dieses Rauch- gas zur Erzeugung von Dampf oder heißem Wasser genutzt wird, und • at least two coke oven compartments are grouped together to form a "heat recovery" coke oven bank, and a distinction is made between a period of operation and a coke oven bench downtime, and • During the period of operation, the coking gas is used to heat the coke cake by combustion with air and to provide the heat necessary for coking to produce a hot flue gas which is fed into a waste heat boiler where this flue gas is used to produce steam or hot water is used, and
• das heiße Rauchgas während der Betriebsperiode über eine Sammelleitung von den Kokskammeröfen in den Abhitzekessel geführt wird, und• the hot flue gas is fed from the coke oven furnaces into the waste heat boiler via a collecting line during the operating period, and
• die Koksofenkammern während der Stillstandsperiode entleert werden, so dass diese keine Kohle und keinen Koks mehr enthalten, und welches dadurch gekennzeichnet ist, dass • The coke oven chambers are emptied during the standstill period, so that they no longer contain coal and coke, and which is characterized in that
• die Koksofenkammern während der Stillstandsperiode mit einem fremdbefeuerten Brenner warmgehalten werden, so dass auch während der Stillstandsperiode ein heißes Rauchgas bereitgestellt wird, welches aus dem Rauchgas der Brenner stammt, und • the coke oven chambers are kept warm during the standstill period with an externally fired burner, so that a hot flue gas, which comes from the flue gas of the burner, is also provided during the standstill period, and
• der Gasfluss in der Sammelleitung während der Stillstandsperiode vor dem Eintritt in den Abhitzekessel abgesperrt wird, wobei das heiße Rauchgas der Brenner statt in den Abhitzekessel in einen Rauchgaskamin geleitet wird, der sich vor dem Abhitzekessel befindet.  • the gas flow in the manifold is shut off during the standstill period before entering the waste heat boiler, the hot flue gas of the burner is passed instead of the waste heat boiler in a flue gas fireplace, which is located in front of the waste heat boiler.
[0018] Die Brenner können beliebig geartet sein. Diese können beispielsweise mit Erdgas beheizt werden. Möglich ist es aber auch, diese mit einem anderenThe burners can be of any kind. These can be heated, for example, with natural gas. But it is also possible, this with another
Gas, oder mit flüssigen Brennstoffen zu befeuern. Die Brennstoffe sind bevorzugt kohlenwasserstoffhaltig. Gas, or to fuel with liquid fuels. The fuels are preferably hydrocarbon-containing.
[0019] Die erfindungsgemäße Vorrichtung und das erfindungsgemäße Verfahren bieten den Vorteil, eine übermäßige Emission von Schadstoffen während des Stillstandes von Abhitzekesseln von Koksofenbänken zu vermeiden. The inventive device and the inventive method have the advantage of avoiding excessive emission of pollutants during the standstill of waste heat from coke oven benches.
[0020] Die erfindungsgemäße Vorrichtung wird anhand einer Zeichnung erläutert, wobei diese Zeichnung nur ein Ausführungsbeispiel für die Konstruktion der erfindungsgemäßen Vorrichtung ist. The device of the invention will be explained with reference to a drawing, this drawing is only one embodiment of the construction of the device according to the invention.
[0021] In einer Anordnung (1) von zwei Koksofenbänken aus erster (1a) und zweiter Koksofenbank (1b) sind fünf Koksofenkammern (2) in je zwei Koksofenbänken angeordnet. Jede Koksofenkammer (2) kann mit einem Brenner (2a) aus- gerüstet werden, der die jeweilige Koksofenkammer beheizt. Jede Koksofenkammer (2) ist über einen Rauchgaskanal (3) mit einer Sammelleitung (4) für Rauchgas versehen, durch den die Sammelleitung (4) aus den Rauchgaskanälen (3) mit Rauchgasen versorgt wird. Die Sammelleitung (4) mündet in eine gemeinsame Ab- führleitung, die wiederum in den Abhitzekessel (5) mündet. Vor dem AbhitzekesselIn an arrangement (1) of two Koksofenbänken from the first (1a) and second coke oven bank (1b) five coke oven chambers (2) are arranged in two coke oven banks. Each coke oven chamber (2) can be equipped with a burner (2a) be equipped, which heats the respective coke oven chamber. Each coke oven chamber (2) is provided via a flue gas duct (3) with a manifold (4) for flue gas, through which the manifold (4) from the flue gas ducts (3) is supplied with flue gases. The collecting line (4) opens into a common discharge line, which in turn flows into the waste heat boiler (5). In front of the waste heat boiler
(5) befindet sich ein vertikal aufwärts führender Rauchgaskamin (6), der über eine Absperrvorrichtung (6a) absperrbar ist. Auch die Abführleitung (7) ist über eine Absperrvorrichtung (7a) im Gasfluss vor dem Eintritt in den Abhitzekessel (5) absperrbar. Die Abführleitung (7) mündet schließlich in einen Abhitzekessel (5), der mit Speisewasser (5a) versorgt wird und über indirekten Wärmetausch Dampf oder heißes Wasser (5b) erzeugt. Man erhält dadurch ein gekühltes Abgas. Dieses wird über eine Ausführleitung für Abgas (8) in eine Abgassammelleitung (9) geführt. Die Ausführleitung für Abgas (8) ist ebenfalls mit einer Absperrvorrichtung für die Ausführleitung für Abgas (8a) versehen. Die Abgassammelleitung (9) mündet schließ- lieh in eine Abgasreinigungsanlage (10). Hinter der Abgasreinigungsanlage (10) befindet sich ein Ventilator (11), der einen Unterdruck erzeugt. Das gereinigte Abgas wird in einen Abgaskamin (12) geführt. (5) is a vertically upwardly leading flue gas fireplace (6), which can be shut off via a shut-off device (6a). Also, the discharge line (7) can be shut off via a shut-off device (7a) in the gas flow before entering the waste heat boiler (5). The discharge line (7) finally leads into a waste heat boiler (5) which is supplied with feed water (5a) and generates steam or hot water (5b) via indirect heat exchange. This gives a cooled exhaust gas. This is guided via a discharge line for exhaust (8) in an exhaust manifold (9). The discharge pipe for exhaust gas (8) is also provided with a shut-off device for the discharge pipe for exhaust gas (8a). The exhaust manifold (9) finally leads into an emission control system (10). Behind the exhaust gas purification system (10) is a fan (11), which generates a negative pressure. The purified exhaust gas is fed into an exhaust stack (12).
[0022] Zur Ausführung der Erfindung befinden sich in jeder Koksofenkammer (2) in dem Gasraum über dem Kokskuchen (2b) Brenner (2a), die nach Entleerung der Koksofenkammer in der Stillstandsperiode die leeren Koksofenkammern (2) beheizen und mit heißen Rauchgasen versorgen. Dabei wird die Absperrvorrichtung (7a) vor dem Abhitzekessel (5) geschlossen und die Absperrvorrichtung (6a) in dem Rauchgaskamin geöffnet. Das heiße Rauchgas aus den Brennern (2a), welches schadstoffarm ist, wird in die Atmosphäre geleitet. Die Koksofenkammern (2) kühlen so nicht aus, während gleichzeitig der Abhitzekessel (5) einer Revision unterzogen und / oder gereinigt werden kann. To carry out the invention are in each coke oven chamber (2) in the gas space above the coke cake (2b) burner (2a), the empty coke oven chambers (2) after emptying the coke oven chamber in the standstill period and supply with hot flue gases. In this case, the shut-off device (7a) in front of the waste heat boiler (5) is closed and the shut-off device (6a) is opened in the flue gas fireplace. The hot flue gas from the burners (2a), which is low in pollutants, is discharged into the atmosphere. The coke oven chambers (2) thus do not cool, while at the same time the waste heat boiler (5) can be revised and / or cleaned.
[0023] Bezugszeichenliste [0023] List of Reference Numerals
1 Koksofenbank  1 coke oven bench
1a Erste Koksofenbank  1a First coke oven bench
1b Zweite Koksofenbank  1b Second coke oven bench
2 Koksofenkammer  2 coke oven chamber
2a Brenner  2a burner
2b Kohle- / Kokskuchen  2b coal / coke cake
3 Rauchgaskanal  3 flue gas duct
4 Sammelleitung für Rauchgas  4 manifold for flue gas
5 Abhitzekessel a Speisewasserzufuhr5 waste heat boiler a Feedwater supply
b Dampf- / Heißwasserabzug b steam / hot water extraction
Rauchgaskamin Flue gas fireplace
a Absperrvorrichtung im Rauchgaskamin a Shut-off device in the flue gas fireplace
Ausführleitung für Rauchgas Execution line for flue gas
a Absperrvorrichtung für die Ausführleitung für Rauchgasa Shut-off device for the flue gas delivery line
Ausführleitung für AbgasExhaust pipe for exhaust
a Absperrvorrichtung für die Ausführleitung für Abgasa shut-off device for the discharge line for exhaust gas
AbgassammelleitungExhaust manifold
0 Abgasreinigungsanlage0 emission control system
1 Abgasventilator1 exhaust fan
2 Abgaskamin 2 exhaust stack

Claims

Patentansprüche claims
1. Vorrichtung zur Warmhaltung von Koksofenkammern während des Stillstandes eines Abhitzekessels, umfassend 1. A device for keeping hot coke oven chambers during standstill of a waste heat boiler, comprising
• mindestens zwei Koksofenkammern, die zu einer Koksofenbank zu- sammengefasst werden,  • at least two coke oven chambers, which are combined to form a coke oven bank,
• eine Sammelleitung, die die heißen Rauchgase aus der Verbrennung des Verkokungsgases aufnimmt, und die in eine gemeinsame Ausführleitung mündet,  A collecting line, which receives the hot flue gases from the combustion of the coking gas, and which opens into a common delivery line,
• einen Abhitzekessel, der aus dieser Ausführleitung mit heißen Rauchga- sen versorgt wird, und der mit mindestens einer Zuführleitung für Kesselspeisewasser und einer Abführleitung für Dampf oder heißem Wasser und einer Ausführleitung für gekühltes Abgas ausgestattet ist, wobei eine indirekte Wärmeübertragung von Wärmetausch mit den heißen Rauchgasen aus der Verbrennung des Verkokungsgases an das Kühl- medium Kesselspeisewasser ermöglicht wird,  • a waste heat boiler, supplied with hot flue gases from this delivery pipe and equipped with at least one feed pipe for boiler feed water and a steam or hot water discharge pipe and a cooled exhaust pipe, with indirect heat transfer from heat exchange to hot Flue gases from the combustion of the coking gas to the cooling medium boiler feed water is made possible,
• eine Abgasleitung, die das gekühlte Abgas aus dem Abhitzekessel ausführt, und diese Abgasleitung mit einer Absperrvorrichtung ausgerüstet ist,  An exhaust pipe that carries the cooled exhaust gas from the waste heat boiler, and this exhaust pipe is equipped with a shut-off device,
dadurch gekennzeichnet, dass  characterized in that
• die Koksofenkammern mit mindestens einem fremdbeheizten Brenner ausgestattet sind, und  • the coke oven chambers are equipped with at least one externally heated burner, and
• die Sammelleitung in Gasflussrichtung vor dem Eintritt des Rauchgases in den Abhitzekessel mit einer Absperrvorrichtung ausgerüstet ist, und diese Sammelleitung weiterhin mit einem in Gasflussrichtung vor der Absperrvorrichtung vertikal aufwärts ausführenden Abgaskamin ausgestattet ist.  • The collecting line is equipped in the gas flow direction before the entry of the flue gas in the waste heat boiler with a shut-off device, and this manifold is further equipped with a gas flow direction in front of the shut-off vertically performing exhaust stack.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass der Rauchgaskamin mit einer Absperrvorrichtung ausgestattet ist. 2. Apparatus according to claim 1, characterized in that the flue gas fireplace is equipped with a shut-off device.
3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Abgasleitung für das gekühlte Abgas mit einem Saugventilator versehen ist, durch den ein Unterdruck erzeugt werden kann. 3. Device according to one of claims 1 or 2, characterized in that the exhaust pipe for the cooled exhaust gas is provided with a suction fan, through which a negative pressure can be generated.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass es sich bei den Koksofenkammern um Koksofenkammern handelt, bei denen das ausgeführte Rauchgas aus der vollständigen Verbrennung des Verkokungsgases stammt. 4. Device according to one of claims 1 to 3, characterized in that it is in the coke oven chambers to coke oven chambers in which the exported flue gas comes from the complete combustion of the coking gas.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass an jeder Koksofenkammer mindestens ein Brenner angeordnet ist, durch den die Koksofenkammer beheizbar ist. 5. Device according to one of claims 1 to 4, characterized in that at least one burner is arranged at each coke oven chamber through which the coke oven chamber is heated.
6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Vorrichtung eine Abgasreinigungsanlage enthält. 6. Device according to one of claims 1 to 5, characterized in that the device includes an emission control system.
7. Verfahren zur Warmhaltung von Koksofenkammern während des Stillstandes eines Abhitzekessels, wobei 7. A method for keeping warm coke oven chambers during standstill of a waste heat boiler, wherein
• mindestens zwei Koksofenkammern zu einer Koksofenbank vom Typ „Heat-Recovery" zusammengefasst werden, und zwischen einer Betriebsperiode und einer Stillstandsperiode der Koksofenbank unterschie- den wird, und  • at least two coke oven compartments are combined to form a "heat recovery" coke oven bank and differentiated between one operating period and one coke oven bench downtime, and
• während der Betriebsperiode das Verkokungsgas dazu genutzt wird, durch Verbrennung mit Luft den Kokskuchen zu erhitzen und die zur Verkokung notwendige Wärme zu liefern, so dass ein heißes Rauchgas entsteht, welches in einen Abhitzekessel geführt wird, wo dieses Rauch- gas zur Erzeugung von Dampf oder heißem Wasser genutzt wird, und During the period of operation, the coking gas is used to heat the coke cake by combustion with air and to supply the heat necessary for coking to produce a hot flue gas which is fed into a waste heat boiler where this flue gas generates steam or hot water is used, and
• das heiße Rauchgas während der Betriebsperiode über eine Sammelleitung von den Kokskammeröfen in den Abhitzekessel geführt wird, und• the hot flue gas is fed from the coke oven furnaces into the waste heat boiler via a collecting line during the operating period, and
• die Koksofenkammern während der Stillstandsperiode entleert werden, so dass diese keine Kohle und keinen Koks mehr enthalten, dadurch gekennzeichnet, dass • The coke oven chambers are emptied during the standstill period so that they no longer contain coal and coke, characterized in that
• die Koksofenkammern während der Stillstandsperiode mit mindestens einem fremdbefeuerten Brenner warmgehalten werden, so dass auch während der Stillstandsperiode ein heißes Rauchgas bereitgestellt wird, welches aus dem Rauchgas der Brenner stammt, und • the coke oven chambers are kept warm during the standstill period with at least one externally fired burner, so that a hot flue gas, which comes from the flue gas of the burner, is also provided during the standstill period, and
• der Gasfluss in der Sammelleitung während der Stillstandsperiode vor dem Eintritt in den Abhitzekessel abgesperrt wird, wobei das heiße Rauchgas der Brenner statt in den Abhitzekessel in einen Rauchgaskamin geleitet wird, der sich vor dem Abhitzekessel befindet. • The gas flow in the manifold is shut off during the standstill period before entering the heat recovery boiler, the hot Flue gas of the burner is instead directed into the waste heat boiler in a flue gas fireplace, which is located in front of the waste heat boiler.
8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass der oder die Brenner mit Erdgas einem anderen Gas oder mit flüssigen Brennstoffen befeuert werden. 8. The method according to claim 7, characterized in that the burner or burners are fired with natural gas another gas or liquid fuels.
EP10723496A 2009-07-01 2010-05-05 Method and device for keeping coke furnace chambers hot when a waste heat boiler is stopped Withdrawn EP2491096A1 (en)

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DE102009031436A DE102009031436A1 (en) 2009-07-01 2009-07-01 Method and device for keeping warm coke oven chambers during standstill of a waste heat boiler
PCT/EP2010/002743 WO2011000447A1 (en) 2009-07-01 2010-05-05 Method and device for keeping coke furnace chambers hot when a waste heat boiler is stopped

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MX2011013968A (en) 2012-05-08
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US20120152720A1 (en) 2012-06-21
EA201290025A1 (en) 2012-09-28
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IN2012DN00607A (en) 2015-06-12
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CO6791578A2 (en) 2013-11-14
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NZ597662A (en) 2014-04-30
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PE20121196A1 (en) 2012-09-19
TWI471414B (en) 2015-02-01

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