EP0210435B1 - Process for cooling and cleaning generator gas and furnace gas, and apparatus for carrying out this process - Google Patents
Process for cooling and cleaning generator gas and furnace gas, and apparatus for carrying out this process Download PDFInfo
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- EP0210435B1 EP0210435B1 EP86108610A EP86108610A EP0210435B1 EP 0210435 B1 EP0210435 B1 EP 0210435B1 EP 86108610 A EP86108610 A EP 86108610A EP 86108610 A EP86108610 A EP 86108610A EP 0210435 B1 EP0210435 B1 EP 0210435B1
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- Prior art keywords
- gas
- cooling
- cleaning unit
- cleaning
- unit
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- 238000004140 cleaning Methods 0.000 title claims description 45
- 238000001816 cooling Methods 0.000 title claims description 45
- 238000000034 method Methods 0.000 title claims description 16
- 239000007789 gas Substances 0.000 claims description 95
- 239000000112 cooling gas Substances 0.000 claims description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 4
- 239000003380 propellant Substances 0.000 claims 3
- 239000000428 dust Substances 0.000 description 9
- 206010010774 Constipation Diseases 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
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- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/20—Arrangements for treatment or cleaning of waste gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
- Y10S75/958—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures with concurrent production of iron and other desired nonmetallic product, e.g. energy, fertilizer
Definitions
- the invention relates to a method according to the preamble of claim 1 and a device for carrying it out.
- control range of the scrubbers used extends over a quantitative ratio of up to about 1: 4 Device and the permissible clean gas dust contents can no longer be maintained.
- a regulation for changes in quantity up to about 1:20 could possibly be achieved if every cleaning unit included two adjustable venturi washers and the associated droplet separators.
- the invention is characterized in that for the generation of the cooling and excess gas separate cooling and cleaning units are used and that an essentially constant gas quantity is passed through the final stage of the cooling and cleaning unit for the cooling gas, such that the part of the generator gas to be cooled and cleaned is exceeded in the cooling and Cleaning unit for the excess gas is passed.
- the cleaning in each of the cooling and cleaning units takes place in two stages, and the part of the generator gas used to generate the excess gas is passed through the first cleaning stage of the cooling and cleaning unit for the cooling gas and then through the second cleaning stage of the cooling and Cleaning unit led for the excess gas.
- the part of the total amount of gas generated in the melter gasifier which is no longer required in the arrangement of the melter gasifier and the reduction unit, is preferably discharged exclusively via the cooling and cleaning unit for the excess gas, and furthermore only that in the arrangement of the melter gasifier is carried out by the cooling and cleaning unit for the cooling gas and the reduction unit as the cooling and conveying gas.
- the part of the gas led out of the cooling and cleaning unit for the cooling gas which is not required as the cooling and conveying gas in the arrangement of the melter gasifier and the reduction unit, can be returned to the inlet of this unit, so that the gas passed through this unit
- the amount of gas is essentially constant regardless of the cooling gas requirement.
- each cooling and cleaning unit has a pack washer and an adjustable venturi washer connected downstream of it.
- a connecting line from the outlet of the packing washer of the cooling and cleaning unit for the cooling gas to the input of the venturi washer of the cooling and cleaning unit for the excess gas is provided.
- a suitable device is characterized in that a conveying device with a constant flow rate is arranged in the cooling and cleaning unit for the cooling gas behind the branch for the connecting line or behind this unit.
- This shows a schematic representation of the cooling and cleaning units for the generator gas and the top gas of an arrangement consisting of a direct reduction unit and a melter gasifier.
- the blast furnace gas of a direct reduction shaft furnace is fed via a line 1 and the part of the generator gas generated in a melter gasifier, which is not blown directly into the reduction zone of the direct reduction shaft furnace, is fed via line 2.
- the top gas under pressure passes from line 1 into a pack washer 3, in which it is cooled and prewashed to the desired temperature.
- the blast furnace gas thus prepared is then passed via line 4 into an adjustable venturi scrubber 5.
- the part of the generator gas flowing through line 2 passes into a pack washer 6, in which this gas is also cooled to the desired temperature and prewashed. Part of this gas pretreated in this way is fed via line 7 to an adjustable venturi scrubber 8, in which it is washed again, so that the required clean gas dust content is achieved.
- This gas is then dewatered in a downstream droplet separator 9. It then passes through a line 10 to a blower 11, by means of which it is brought to the required pressure in order to be available as cooling gas in a line 12 mainly for setting the generator gas temperature.
- the blower 11 is a volume conveyor which always delivers the same amount of gas at a constant system pressure, so that a constant amount of gas flows through the venturi scrubber 8. Since the amount of gas supplied via line 2 does not correspond to the amount of gas conveyed by the blower 11, the outlet line of the pack washer 6 is branched into line 7 and a further line 13, which conducts the amount of gas not received by line 7 to the inlet of venturi scrubber 5.
- the blast furnace gas processed in the pack scrubber 3 is thus fed via line 4 and part of the generator gas processed in the pack scrubber 6 is fed via line 13.
- the sum of these two quantities of gas is essentially constant even in exceptional operating conditions.
- a droplet separator 14 for dewatering the cleaned gas is also connected downstream of the venturi scrubber 5.
- the cleaned and cooled excess gas of the plant is passed to suitable consumers via a line 15.
- the cooling gas in line 12 insofar as it is not required in the arrangement comprising the melter gasifier and direct reduction shaft furnace, is fed back to the inlet of the pack washer 6 via a branched line 16. This ensures that an approximately constant amount of gas always flows through the venturi scrubber 8 regardless of the cooling gas requirement of the reduction system.
- the two pack washers 3 and 6 are relatively insensitive to large fluctuations in the gas quantities passed through. In them, the dust is largely removed from the gases, so that the amounts of dust washed out in the venturi scrubbers 5 and 8 are relatively small and there is no risk of blockage of these scrubbers. This also makes it possible for gases with an extremely low clean gas dust content of 5 mg / Nm3 at the outlet of the Venturi scrubber to obtain.
- venturi scrubbers The mode of operation of the venturi scrubbers depends on the amount of gas passed through them.
- measures described, in particular the blower 11 which promotes a constant gas volume and the line 13 between the outlet of the pack washer 6 and the inlet of the venturi washer 5 ensure that the venturi washers 5 and 8 are flowed through by substantially constant gas flows.
- venturi scrubber 5 it is therefore possible, on the one hand, for optimal degrees of separation for the venturi scrubber 5 in that the part of the total amount of gas generated in the melter gasifier, which is not required in the arrangement of the melter gasifier and direct reduction shaft furnace, is dissipated as excess gas exclusively via this venturi scrubber and, on the other hand, for the venturi scrubber 8 in that only through this the amount of gas required in the arrangement of the melter gasifier and direct reduction shaft furnace as cooling and conveying gas is passed.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Industrial Gases (AREA)
Description
Die Erfindung betrifft ein verfahren nach dem Oberbegriff des Anspruchs 1 sowie eine Vorrichtung zu dessen Durchführung.The invention relates to a method according to the preamble of claim 1 and a device for carrying it out.
Aus der DE-PS 30 34 539 ist ein Verfahren zur direkten Erzeugung von flüssigem Roheisen aus stückigem Eisenerz bekannt, das in einem Direktreduktionsschachtofen mittels eines Reduktionsgases zu Eisenschwamm reduziert und dann in einem Einschmelzvergaser mit Hilfe von Kohle und sauerstoffhaltigem Gas geschmolzen wird, wobei zugleich das zur Reduktion des Eisenerzes verwendete Generatorgas erzeugt wird. Dieses wird abgekühlt und entstaubt und dann ein erster Teilstrom hiervon in die Reduktionszone des Direktreduktionsschachtofens eingeblasen. Ein zweiter Teilstrom wird zur Erzeugung Von Kühlgas für das Generatorgas nochmals gekühlt und gewaschen. Das im Direktreduktionsschachtofen erhaltene Gichtgas wird an dessen oberem Ende abgeführt und einer geeigneten Verwendung zugeführt, wobei es Üblicherweise in einem von dem Generatorgaskreislauf vollständig getrennten Kühl- und Reinigungsaggregat aufbereitet wird. Diese Aggregate sind sowohl für das Generatorgas als auch für das Gichtgas stark verhänderlichen Betriebsbedingungen unterworfen. Im normalen Betrieb wird fast das gesamte im Einschmelzvergaser erzeugte Generatorgas als Reduktionsgas verwendet und auch die Kühlgasmenge kann sehr gering sein, so daß kein oder nur sehr wenig aus dem Generatorgas stammendes, für den Betrieb nicht benötigtes Überschußgas anfällt. Beim Anfahren der nach dem bekannten Verfahren arbeitenden Vorrichtung sowie bei verschiedenen Betriebsstörungen dagegen wird der größte Teil des Generatorgases über das Kühl- und Reinigungsaggregat für das Kühlgas geführt, während die Gichtgasmenge sehr gering ist. Es ergeben sich daher Schwankungen hinsichtlich der durch die jeweiligen Wäscher geleiteten Gasmengen bis zu einem Verhältnis von etwa 1 : 20. Der Regelbereich der verwendeten Wäscher erstreckt sich jedoch über ein Mengenverhältnis bis etwa 1 : 4. Bei dieses Verhältnis übersteigenden Mengenschwankungen können daher der Betrieb der Vorrichtung und die zulässigen Reingasstaubgehalte nicht mehr aufrechterhalten werden. Eine Regelung für Mengenänderungen bis etwa 1 : 20 ließe sich möglicherweise erreichen, wenn jedes Reinigungsaggregat mit zwei verstellbaren Venturiwäschern und den zugehörigen Tropfenabscheidern ausgestattet wäre. Hierbei ergäben sich jedoch andere Schwierigkeiten, insbesondere die Gefahr der häufigen Verstopfung durch die in den Gasen mitgeführten erheblichen Staubmengen.From DE-PS 30 34 539 a process for the direct production of molten pig iron from lumpy iron ore is known, which is reduced to sponge iron in a direct reduction shaft furnace by means of a reducing gas and then melted in a melter gasifier with the help of coal and oxygen-containing gas, the same time generator gas used to reduce the iron ore is generated. This is cooled and dedusted and then a first partial stream thereof is blown into the reduction zone of the direct reduction shaft furnace. A second partial stream becomes Generation of cooling gas for the generator gas cooled and washed again. The blast furnace gas obtained in the direct reduction shaft furnace is discharged at its upper end and used for a suitable use, it usually being processed in a cooling and cleaning unit which is completely separate from the generator gas circuit. These units are subject to highly variable operating conditions both for the generator gas and for the blast furnace gas. In normal operation, almost all of the generator gas generated in the melter gasifier is used as the reducing gas, and the amount of cooling gas can also be very small, so that there is no or only very little excess gas from the generator gas that is not required for operation. On the other hand, when the device operating according to the known method is started up and in the event of various malfunctions, the major part of the generator gas is conducted via the cooling and cleaning unit for the cooling gas, while the amount of blast furnace gas is very small. There are therefore fluctuations with respect to the gas quantities passed through the respective scrubbers up to a ratio of about 1: 20. However, the control range of the scrubbers used extends over a quantitative ratio of up to about 1: 4 Device and the permissible clean gas dust contents can no longer be maintained. A regulation for changes in quantity up to about 1:20 could possibly be achieved if every cleaning unit included two adjustable venturi washers and the associated droplet separators. However, this would give rise to other difficulties, in particular the risk of frequent constipation due to the considerable amounts of dust carried in the gases.
Es ist daher die Aufgabe der vorliegenden Erfindung, das bekannte Verfahren zur Erzeugung von Kühlgas für in einem Einschmelzvergaser erzeugtes Generatorgas und von in geeigneter Weise verwendbarem Überschußgas durch Kühlung und Reinigung mindestens eines Teils des Generatorgases einerseits und des Gichtgases andererseits eines Eisenerz-Reduktionsaggregates, wobei das Kühlgas ausschließlich aus dem Generatorgas gewonnen wird, dahingehend zu verbessern, daß auch bei starken Schwankungen der den Kühl- und Reinigungsaggregaten zugeführten Gasmengen stets eine Senkung des Staubgehaltes auf die gewünschten Werte, beispielsweise 5 bis 10 mg/Nm³ möglich ist, wobei die Wartung dieser Aggregate einfach und kostengünstig ist und auch ihr Energieverbrauch relativ niedrig liegt.It is therefore the object of the present invention to provide the known method for producing cooling gas for generator gas generated in a melter gasifier and excess gas which can be used in a suitable manner by cooling and cleaning at least part of the generator gas on the one hand and the top gas on the other hand of an iron ore reduction unit, the Cooling gas is obtained exclusively from the generator gas in order to improve that even with strong fluctuations in the gas quantities supplied to the cooling and cleaning units, a reduction in the dust content to the desired values, for example 5 to 10 mg / Nm³, is possible, the maintenance of these units is simple and inexpensive and its energy consumption is relatively low.
Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst. Vorteilhafte Ausgestaltungen des erfindungsgemäßen Verfahrens sowie einer Vorrichtung zur Durchführung dieses Verfahrens ergeben sich aus den Unteransprüchen.This object is achieved by the features specified in the characterizing part of claim 1. Advantageous refinements of the method according to the invention and an apparatus for carrying out this method result from the subclaims.
Die Erfindung zeichnet sich dadurch aus, daß für die Erzeugung des Kühl- und des Überschußgases getrennte Kühl- und Reinigungsaggregate verwendet werden und daß durch die Endstufe des Kühl- und Reinigungsaggregates für das Kühlgas eine im wesentlichen konstante Gasmenge geführt wird, derart, daß der diese Gasmenge Übersteigende Teil des zu kühlen-den und zu reinigenden Generatorgases in das Kühl- und Reinigungsaggregat für das Überschußgas geleitet wird.The invention is characterized in that for the generation of the cooling and excess gas separate cooling and cleaning units are used and that an essentially constant gas quantity is passed through the final stage of the cooling and cleaning unit for the cooling gas, such that the part of the generator gas to be cooled and cleaned is exceeded in the cooling and Cleaning unit for the excess gas is passed.
In einer vorteilhaften Ausbildung dieses Verfahrens erfolgt die Reinigung in jedem der Kühl- und Reinigungsaggregate zweistufig und der zur Erzeugung des Überschußgases dienende Teil des Generatorgases wird durch die erste Reinigungsstufe des Kühl- und Reinigungsaggregates für das Kühlgas und anschließend durch die zweite Reinigungsstufe des Kühl- und Reinigungsaggregates für das Überschußgas geführt. Es wird vorzugsweise der in der Anordnung aus Einschmelzvergaser und Reduktionsaggregat nicht mehr benötigte Teil der im Einschmelzvergaser insgesamt erzeugten Gasmenge ausschließlich über das Kühl- und Reinigungsaggregat für das Überschußgas abgeführt und weiterhin durch das Kühl-und Reinigungsaggregat für das Kühlgas nur die in der Anordnung aus Einschmelzvergaser und Reduktionsaggregat als Kühl- und Fördergas benötigte Gasmenge geleitet. Der als Kühl-und Fördergas in der Anordnung aus Einschmelzvergaser und Reduktionsaggregat nicht benötigte Teil des aus dem Kühl- und Reinigungsaggregat für das Kühlgas herausgeführten Gases kann zum Eingang dieses Aggregates zurückgeführt werden, so daß die durch dieses Aggregat hindurchgeleitete Gasmenge unabhängig vom Kühlgasbedarf im wesentlichen konstant ist.In an advantageous embodiment of this method, the cleaning in each of the cooling and cleaning units takes place in two stages, and the part of the generator gas used to generate the excess gas is passed through the first cleaning stage of the cooling and cleaning unit for the cooling gas and then through the second cleaning stage of the cooling and Cleaning unit led for the excess gas. The part of the total amount of gas generated in the melter gasifier, which is no longer required in the arrangement of the melter gasifier and the reduction unit, is preferably discharged exclusively via the cooling and cleaning unit for the excess gas, and furthermore only that in the arrangement of the melter gasifier is carried out by the cooling and cleaning unit for the cooling gas and the reduction unit as the cooling and conveying gas. The part of the gas led out of the cooling and cleaning unit for the cooling gas, which is not required as the cooling and conveying gas in the arrangement of the melter gasifier and the reduction unit, can be returned to the inlet of this unit, so that the gas passed through this unit The amount of gas is essentially constant regardless of the cooling gas requirement.
Bei einer vorteilhaften Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens weist jedes Kühl- und Reinigungsaggregat einen Packungswäscher und einen diesem nachgeschalteten verstellbaren Venturiwäscher auf. Hierbei ist eine Verbindungsleitung vom Ausgang des Packungswäschers des Kühl- und Reinigungsaggregates für das Kühlgas zum Eingang des Venturiwäschers des Kühl- und Reinigungsaggregates für das Überschußgas vorgesehen. Eine geeignete Vorrichtung zeichnet sich dadurch aus, daß im Kühl- und Reinigungsaggregat für das Kühlgas hinter der Abzweigung für die Verbindungsleitung oder hinter diesem Aggregat eine Fördereinrichtung mit einer konstanten Durchflußmenge angeordnet ist.In an advantageous device for carrying out the method according to the invention, each cooling and cleaning unit has a pack washer and an adjustable venturi washer connected downstream of it. Here, a connecting line from the outlet of the packing washer of the cooling and cleaning unit for the cooling gas to the input of the venturi washer of the cooling and cleaning unit for the excess gas is provided. A suitable device is characterized in that a conveying device with a constant flow rate is arranged in the cooling and cleaning unit for the cooling gas behind the branch for the connecting line or behind this unit.
Die Erfindung wird im folgenden anhand eines in der Figur dargestellten Ausführungsbeispieles näher erläutert. Diese zeigt in schematischer Darstellung die Kühl- und Reinigungsaggregate für das Generatorgas und das Gichtgas einer aus einem Direktreduktionsaggregat und einem Einschmelzvergaser bestehenden Anordnung.The invention is explained below with reference to an embodiment shown in the figure. This shows a schematic representation of the cooling and cleaning units for the generator gas and the top gas of an arrangement consisting of a direct reduction unit and a melter gasifier.
Über eine Leitung 1 wird den Aggregaten das Gichtgas eines Direktreduktionsschachtofens und über eine Leitung 2 der Teil des in einem Einschmelzvergaser erzeugten Generatorgases, der nicht direkt in die Reduktionszone des Direktreduktionsschachtofens eingeblasen wird, zugeführt. Das unter Druck stehende Gichtgas gelangt aus der Leitung 1 in einen Packungswäscher 3, in dem es auf die gewünschte Temperatur gekühlt und vorgewaschen wird. Das so aufbereitete Gichtgas wird dann über eine Leitung 4 in einen verstellbaren Venturiwäscher 5 geleitet.The blast furnace gas of a direct reduction shaft furnace is fed via a line 1 and the part of the generator gas generated in a melter gasifier, which is not blown directly into the reduction zone of the direct reduction shaft furnace, is fed via line 2. The top gas under pressure passes from line 1 into a pack washer 3, in which it is cooled and prewashed to the desired temperature. The blast furnace gas thus prepared is then passed via line 4 into an
Der durch die Leitung 2 strömende Teil des Generatorgases gelangt in einen Packungwäscher 6, in dem dieses Gas ebenfalls auf die gewünschte Temperatur abgekühlt und vorgewaschen wird. Ein Teil dieses so vorbehandelten Gases wird über eine Leitung 7 zu einem verstellbaren Venturiwäscher 8 geführt, in dem es nochmals gewaschen wird, so daß der geforderte Reingasstaubgehalt erreicht wird. In einem nachgeschalteten Tropfenabscheider 9 wird dieses Gas anschließend entwässert. Es gelangt dann über eine Leitung 10 zu einem Gebläse 11, durch das es auf den erforderlichen Druck gebracht wird, um als Kühlgas in einer Leitung 12 hauptsächlich zur Einstellung der Generatorgastemperatur zur Verfügung zu stehen.The part of the generator gas flowing through line 2 passes into a
Das Gebläse 11 ist ein Volumenförderer, der bei konstantem Anlagendruck stets die gleiche Gasmenge fördert, so daß der Venturiwäscher 8 von einer konstanten Gasmenge durchströmt wird. Da die über die Leitung 2 zugeführte Gasmenge nicht der vom Gebläse 11 geförderten Gasmenge entspricht, ist die Ausgangsleitung des Packungswäschers 6 in die Leitung 7 und eine weitere Leitung 13 verzweigt, die die nicht von der Leitung 7 aufgenommene Gasmenge zum Eingang des Venturiwäschers 5 leitet.The
Diesem wird somit Über die Leitung 4 das im Packungswäscher 3 aufbereitete Gichtgas und über die Leitung 13 ein Teil des im Packungswäscher 6 aufbereiteten Generatorgases zugeführt. Die Summe dieser beiden Gasmengen ist auch bei außergewöhnlichen Betriebszuständen im wesentlichen konstant. Auch dem Venturiwäscher 5 ist ein Tropfenabscheider 14 zur Entwässerung des gereinigten Gases nachgeschaltet. Über eine Leitung 15 wird das gereinigte und gekühlte Überschußgas der Anlage zu geeigneten Verbrauchern geführt.The blast furnace gas processed in the pack scrubber 3 is thus fed via line 4 and part of the generator gas processed in the
Das in der Leitung 12 befindliche Kühlgas wird, soweit es in der Anordnung aus Einschmelzvergaser und Direktreduktionsschachtofen nicht benötigt wird, über eine abgezweigte Leitung 16 dem Einlaß des Packungswäschers 6 wieder zugeführt. Hierdurch wird erreicht, daß durch den venturiwäscher 8 unabhängig vom Kühlgasbedarf der Reduktionsanlage stets eine etwa konstante Gasmenge fließt.The cooling gas in
Die beiden Packungswäscher 3 und 6 sind gegen große Schwankungen der hindurchgeleiteten Gasmengen relativ unempfindlich. In ihnen wird der Staub aus den Gasen weitgehend entfernt, so daß die in den Venturiwäschern 5 bzw. 8 herausgewaschenen Staubmengen relativ gering sind und die Gefahr einer Verstopfung dieser Wäscher nicht gegeben ist. Hierdurch ist es auch möglich, am Ausgang der Venturiwäscher Gase mit einem extrem niedrigen Reingasstaubgehalt von 5 mg/Nm³ zu erhalten.The two
Die Arbeitsweise der Venturiwäscher ist von der durch sie hindurchgeführten Gasmenge abhängig. Durch die beschriebenen Maßnahmen, insbesondere durch das ein konstantes Gasvolumen fördernde Gebläse 11 und die Leitung 13 zwischen dem Ausgang des Packungswäschers 6 und dem Einlaß des Venturiwäschers 5 ist jedoch sichergestellt, daß die Venturiwäscher 5 und 8 von im wesentlichen konstanten Gasströmen durchflossen werden. Es lassen sich daher optimale Abscheidegrade einerseits für den Venturiwäscher 5 dadurch, daß der in der Anordnung aus Einschmelzvergaser und Direktreduktionsschachtofen nicht benötigte Teil der im Einschmelzvergaser insgesamt erzeugten Gasmenge ausschließlich über diesen Venturiwäscher als Überschußgas abgeführt und andererseits für den Venturiwäscher 8 dadurch, daß durch diesen nur die in der Anordnung aus Einschmelzvergaser und Direktreduktionsschachtofen als Kühl- und Fördergas benötigte Gasmenge geleitet wird, erreichen. Damit ist sichergestellt, daß unter allen Betriebsbedingungen der Reingasstaubgehalt die vorgegebenen Werte nicht überschreitet. Da die Venturiwäscher nur die Endreinigung der Gase vornehmen, ist auch nicht zu befürchten, daß diese durch zu großen Staubanfall verstopft werden. Die Vorrichtung liefert somit nicht nur ausgezeichnete Betriebsergebnisse, sondern arbeitet auch weitgehend störungsfrei und wartungsfreundlich.The mode of operation of the venturi scrubbers depends on the amount of gas passed through them. However, the measures described, in particular the
Claims (10)
- Process for the production of cooling gas for a generator gas, which has been produced in a melt-down carburettor, and of surplus gas, which can be suitably utilised, by means of cooling and cleaning at least part of the generator gas on the one side and furnace gas on the other side of an iron ore reduction unit, in which respect the cooling gas is obtained exclusively from the generator gas, characterised in that separate cooling and cleaning units are used for the production of the cooling and the surplus gas, and that a substantially constant quantity of gas is fed through the end stage of the cooling and cleaning unit in such a manner that the portion of the generator gas to be cooled and cleaned which is in excess of said amount of gas is delivered into the cooling and cleaning unit for the surplus gas.
- Process according to claim 1, characterised in that the cleaning in each of the cooling and cleaning units is carried out in two stages, and in that the portion of the generator gas which serves the production of the surplus gas is fed through the first cleaning stage of the cooling and cleaning unit for the cooling gas, and subsequently through the second cleaning stage of the cooling and cleaning unit for the surplus gas.
- Process according to claim 1 or 2, characterised in that the no longer required portion of the total gas quantity produced in the melt-down carburettor in the arrangement of meltdown carburettor and reduction unit is exclusively expelled via the cooling and cleaning unit for the surplus gas.
- Process according to one of claims 1 to 3, characterised in that only the cooling gas quantity required as cooling and propellant gas in the arrangement of melt-down carburettor and reduction unit passes through the cooling and cleaning unit for the cooling gas.
- Process according to one of claims 1 to 3, characterised in that the portion of the gas expelled from the cooling and cleaning unit as cooling and propellant gas, which portion is no longer required as cooling and propellant gas in the arrangement of melt-down carburettor and reduction unit, is returned to the inlet of said unit.
- Process according to one of claims 1 to 5, characterised in that water-draining of the delivered gases is carried out in the cooling and cleaning units.
- Apparatus for carrying out the process according to one of claims 1 to 6, characterised in that each cooling and cleaning unit comprises one packing washer (3; 6) followed by an adjustable venturi washer (5; 8), in that a connecting line (13) from the outlet of the packing washer (6) of the cooling and cleaning unit is provided for the cooling gas to the inlet of the venturi washer (5) of the cooling and cleaning unit for the surplus gas is provided, in that a conveyor means (11) with a constant flow-through quantity is provided in the cooling and cleaning unit for the cooling gas behind the branch for the connecting line (13) or behind this cooling and cleaning unit.
- Apparatus according to claim 7, characterised in that a drop separator (14; 9) is connected to the outlet of each venturi washer (5; 8).
- Device according to claims 7 or 8, characterised in that a blower (11) is connected to the outlet of the cooling and cleaning unit for the cooling gas.
- Apparatus according to claim 9, characterised in that the outlet of the drop separator (9) of the cooling and cleaning unit for the cooling gas is connected via the blower (11) to the inlet of the associated packing washer (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3524011 | 1985-07-02 | ||
| DE19853524011 DE3524011A1 (en) | 1985-07-02 | 1985-07-02 | METHOD FOR COOLING AND PURIFYING GENERATOR GAS AND BLAST GAS, AND DEVICE FOR CARRYING OUT THIS METHOD |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0210435A2 EP0210435A2 (en) | 1987-02-04 |
| EP0210435A3 EP0210435A3 (en) | 1989-11-23 |
| EP0210435B1 true EP0210435B1 (en) | 1991-08-28 |
Family
ID=6274999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86108610A Expired - Lifetime EP0210435B1 (en) | 1985-07-02 | 1986-06-24 | Process for cooling and cleaning generator gas and furnace gas, and apparatus for carrying out this process |
Country Status (14)
| Country | Link |
|---|---|
| US (2) | US4793857A (en) |
| EP (1) | EP0210435B1 (en) |
| JP (1) | JPH0768526B2 (en) |
| KR (1) | KR940001529B1 (en) |
| CN (1) | CN1011418B (en) |
| AU (1) | AU595532B2 (en) |
| BR (1) | BR8603067A (en) |
| CA (1) | CA1283542C (en) |
| CS (1) | CS274656B2 (en) |
| DD (1) | DD247917A5 (en) |
| DE (2) | DE3524011A1 (en) |
| IN (1) | IN165848B (en) |
| SU (1) | SU1561828A3 (en) |
| ZA (1) | ZA864394B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6197088B1 (en) | 1992-10-06 | 2001-03-06 | Bechtel Group, Inc. | Producing liquid iron having a low sulfur content |
| US5320676A (en) * | 1992-10-06 | 1994-06-14 | Bechtel Group, Inc. | Low slag iron making process with injecting coolant |
| US5354356A (en) * | 1992-10-06 | 1994-10-11 | Bechtel Group Inc. | Method of providing fuel for an iron making process |
| US5397376A (en) * | 1992-10-06 | 1995-03-14 | Bechtel Group, Inc. | Method of providing fuel for an iron making process |
| US5958107A (en) * | 1993-12-15 | 1999-09-28 | Bechtel Croup, Inc. | Shift conversion for the preparation of reducing gas |
| AT405520B (en) | 1996-05-15 | 1999-09-27 | Voest Alpine Ind Anlagen | METHOD FOR REDUCING IMPURITIES IN THE GAS FLOW AND DEVICE FOR IMPLEMENTING IT |
| JPH1157402A (en) * | 1997-08-13 | 1999-03-02 | Mitsubishi Heavy Ind Ltd | Method and facility for refining gas |
| AT507003B1 (en) * | 2008-06-27 | 2010-03-15 | Siemens Vai Metals Tech Gmbh | PROCESS GAS CLEANING DEVICE FOR A MELT REDUCTION PLANT FOR THE COLLECTION OF RAW IRON |
| EP2746408A1 (en) * | 2012-12-21 | 2014-06-25 | Siemens VAI Metals Technologies GmbH | Overheating of an export gas used in a reduction process to balance flow variability and apparatus therefor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT247385B (en) * | 1961-05-16 | 1966-06-10 | Zd Y Na Vyrobu Vzduchotechnick | Dry cleaning process for blast furnace (furnace) gas |
| GB1582232A (en) * | 1976-08-14 | 1981-01-07 | Lodge Cottrell Ltd | Gas cleaning |
| US4316739A (en) * | 1979-07-16 | 1982-02-23 | Midrex Corporation | Method for producing molten iron |
| US4330511A (en) * | 1980-03-17 | 1982-05-18 | Peter F. Loftus Corporation (Illinois) | Treatment of blast furnace off-gas |
| DE3034539C2 (en) * | 1980-09-12 | 1982-07-22 | Korf-Stahl Ag, 7570 Baden-Baden | Method and device for the direct production of liquid pig iron from lumpy iron ore |
| SU1479006A3 (en) * | 1984-11-26 | 1989-05-07 | Фоест-Альпине (Фирма) | Method of producing molten iron or steel products and reducing gas in melting gasifier |
-
1985
- 1985-07-02 DE DE19853524011 patent/DE3524011A1/en active Granted
-
1986
- 1986-06-11 AU AU58555/86A patent/AU595532B2/en not_active Ceased
- 1986-06-12 ZA ZA864394A patent/ZA864394B/en unknown
- 1986-06-24 EP EP86108610A patent/EP0210435B1/en not_active Expired - Lifetime
- 1986-06-24 DE DE8686108610T patent/DE3681090D1/en not_active Expired - Lifetime
- 1986-06-25 CS CS470586A patent/CS274656B2/en not_active IP Right Cessation
- 1986-06-30 CA CA000512850A patent/CA1283542C/en not_active Expired - Lifetime
- 1986-06-30 DD DD86291863A patent/DD247917A5/en not_active IP Right Cessation
- 1986-07-01 BR BR8603067A patent/BR8603067A/en not_active IP Right Cessation
- 1986-07-01 SU SU4027780A patent/SU1561828A3/en active
- 1986-07-01 IN IN491/CAL/86A patent/IN165848B/en unknown
- 1986-07-01 JP JP61152823A patent/JPH0768526B2/en not_active Expired - Fee Related
- 1986-07-02 US US06/881,071 patent/US4793857A/en not_active Expired - Lifetime
- 1986-07-02 CN CN86104420A patent/CN1011418B/en not_active Expired
- 1986-07-02 KR KR1019860005360A patent/KR940001529B1/en not_active Expired - Fee Related
-
1988
- 1988-09-30 US US07/252,184 patent/US4850574A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CS274656B2 (en) | 1991-09-15 |
| KR940001529B1 (en) | 1994-02-23 |
| ZA864394B (en) | 1987-02-25 |
| JPS6284184A (en) | 1987-04-17 |
| CS470586A2 (en) | 1990-10-12 |
| US4850574A (en) | 1989-07-25 |
| CN1011418B (en) | 1991-01-30 |
| AU5855586A (en) | 1987-01-22 |
| JPH0768526B2 (en) | 1995-07-26 |
| DE3524011A1 (en) | 1987-01-15 |
| DE3524011C2 (en) | 1989-01-05 |
| KR870001293A (en) | 1987-03-12 |
| US4793857A (en) | 1988-12-27 |
| DE3681090D1 (en) | 1991-10-02 |
| EP0210435A2 (en) | 1987-02-04 |
| CN86104420A (en) | 1987-02-04 |
| EP0210435A3 (en) | 1989-11-23 |
| IN165848B (en) | 1990-01-27 |
| CA1283542C (en) | 1991-04-30 |
| SU1561828A3 (en) | 1990-04-30 |
| AU595532B2 (en) | 1990-04-05 |
| DD247917A5 (en) | 1987-07-22 |
| BR8603067A (en) | 1987-03-17 |
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