DE1083289B - Cleaning device to prevent the build-up of iron bears in the exhaust gas ducts of converters when hot metal is blown - Google Patents

Cleaning device to prevent the build-up of iron bears in the exhaust gas ducts of converters when hot metal is blown

Info

Publication number
DE1083289B
DE1083289B DED25692A DED0025692A DE1083289B DE 1083289 B DE1083289 B DE 1083289B DE D25692 A DED25692 A DE D25692A DE D0025692 A DED0025692 A DE D0025692A DE 1083289 B DE1083289 B DE 1083289B
Authority
DE
Germany
Prior art keywords
cleaning device
pipe walls
converters
exhaust ducts
cleaning
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.)
Pending
Application number
DED25692A
Other languages
German (de)
Inventor
Dr-Ing Ernst Lenhart
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.)
Deutsche Babcock and Wilcox Dampfkesselwerke AG
Original Assignee
Deutsche Babcock and Wilcox Dampfkesselwerke AG
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 Deutsche Babcock and Wilcox Dampfkesselwerke AG filed Critical Deutsche Babcock and Wilcox Dampfkesselwerke AG
Priority to DED25692A priority Critical patent/DE1083289B/en
Publication of DE1083289B publication Critical patent/DE1083289B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/46Details or accessories
    • C21C5/4693Skull removal; Cleaning of the converter mouth

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Incineration Of Waste (AREA)
  • Cleaning In General (AREA)

Description

Reinigungsvorrichtung zum Verhindern des Ansetzens von Eisenbären in den Abgasschächten von Konvertern beim Verblasen von Roheisen Die Erfindung betrifft eine Reinigungsvorrichtung zum Verhindern des Ansetzens von Eisenbären in den Abgasschächten von Konvertern beim Verblasen von koheisen. Die Erfindung besteht darin, daß die Rohrwände der Abgasschächte mit an sich bekannten Rüttelvorrichtungen mechanischer oder akustischer Art versehen sind. Der Betrieb dieser erfindungsgemäßen Reinigungsvorrichtung an den Rohrwänden der Abgasschächte besteht darin, daß diese gerüttelt, geschwungen oder geschlagen werden. Dabei kann die Reinigungsbewegung quer zur Achsrichtung oder in dieser erfolgen.Cleaning device to prevent the attachment of iron bears in the exhaust shafts of converters when blowing pig iron. The invention relates to a cleaning device to prevent iron bears from settling in the exhaust ducts of converters when blowing carbon. The invention is that the Pipe walls of the exhaust ducts with mechanical vibrating devices known per se or acoustic type. The operation of this cleaning device according to the invention on the pipe walls of the exhaust ducts is that they are vibrated, swung or be beaten. The cleaning movement can be transverse to the axial direction or take place in this.

Beim Verblasen von Roheisen im Konverter, sei es beim Blasen von unten durch das Bad oder beim Blasen von Sauerstoff oder von mit Sauerstoff angereicherter Luft gegen die Badoberfläche, entsteht eine heftige Reaktion des Sauerstoffes mit dem Bad unter starker Kochbewegung, und es tritt ein Mitreißen von Eisenteilchen an die Mündung des Konverters und in die sich anschließenden Abgasschächte auf. Abgesehen vom Eisenverlust wird der Betrieb des Konverters dadurch beeinträchtigt, und das Entfernen dieser sogenannten Eisenbären ist schwierig, zeitraubend und häufig ohne Zerstörung der feuerfestesten Auskleidung des Konverters bzw. Beschädigung der Rohre des Abgaskamins nicht möglich. Derartige Ansätze erreichen teilweise mehrere Tonnen Gewicht und gefährden das Personal sowohl beim vorsätzlichen Abstoßen wie beim unerwarteten Ab- lösen.When hot metal is blown in the converter, be it when blowing from below through the bath or when blowing oxygen or oxygen-enriched air against the bath surface, a violent reaction of the oxygen with the bath occurs with a strong boiling movement, and entrainment occurs Iron particles at the mouth of the converter and in the adjoining exhaust ducts. Apart from the loss of iron, this affects the operation of the converter and the removal of these so-called iron bears is difficult, time-consuming and often impossible without destroying the refractory lining of the converter or damaging the pipes of the exhaust stack. Such approaches sometimes weigh several tons and endanger the personnel both if they are deliberately pushed off or if they are unexpectedly removed.

Die Verwendung gewöhnlicher Kühlrohrwände in den Abgasschächten hat sich als ungeeignet erwiesen. Selbst ein Aneinandersetzen von Vierkantrohren schloß das Festsetzen des Eisens nicht aus, da bereits die zwischen den Vierkantrohren befindliche kleine Furche Anlaß zum Ansetzen des Bären war.The use of ordinary cooling pipe walls in the exhaust ducts has proved unsuitable. Even a juxtaposition of square tubes closed the fixing of the iron does not stop there, since the between the square tubes the small furrow was the reason for the bear to attach.

Im Dampfkesselbau sind bereits Rüttelvorrichtungen mechanischer oder akustischer Art bekannt, mit denen vorhandene Ruß- und Ascheansätze abgeschlagen oder durch dauerndes Rütteln das Ansetzen solcher Ablagerungen verhindert wird. Eine solche Einrichtung vermeidet die beim bisherigen Abschlagen aufgetretenen Nachteile und ermöglicht eine zeit- und kostensparende Reinigung. Durch die an sich bekannten Rüttelvorrichtungen mechanischer oder akustischer Art wird das Ansetzen eines Bären an den Konverterkaminen schon in kleinsten Teilen verhindert. Dabei können nach der Erfindung die gesamten Rohrwände oder einzelne Teile davon periodischen oder aperiodischen Schwingungen unterworfen werden. Um durch Resonanz größere Schwingungsausschläge oder geringere Anfachkräfte zu erzielen, ist es zweckmäßig, die Rohrwände in solche Schwingungen zu versetzen, die der Eigenfrequenz der Heizflächen entsprechen. Bei Verwendung akustischer Schwingungen bzw. von Ultraschall sind Schwinger mit niedriger Frequenz und hoher Energie zu bevorzugen.In steam boiler construction, vibrating devices are already mechanical or acoustic type known, with which existing soot and ash deposits knocked off or the build-up of such deposits is prevented by constant shaking. Such a device avoids the disadvantages that occurred with the previous knocking off and enables time and cost saving cleaning. By the known Vibrating devices of a mechanical or acoustic type are used to attach a bear even the smallest parts prevented at the converter chimneys. You can after of the invention, the entire pipe walls or individual parts thereof periodic or aperiodic vibrations are subjected. To achieve greater oscillation amplitudes through resonance or to achieve lower leveling forces, it is advisable to place the pipe walls in such To move vibrations that correspond to the natural frequency of the heating surfaces. at The use of acoustic vibrations or ultrasound are vibrators with a lower level Prefer frequency and high energy.

Claims (2)

PATENTANSPRÜCHE- 1. Reinigungsvorrichtung zum Verhindern des Ansetzens von Eisenbären in den Abgasschächten von Konvertern beim Verblasen von Roheisen, dadurch gekennzeichnet, daß die Rohrwände der Abgassehächte mit an sich bekannten Rüttelvorrichtungen mechanischer oder akustischer Art versehen sind. PATENT CLAIMS- 1. Cleaning device to prevent the attachment of iron bears in the exhaust ducts of converters when blowing pig iron, characterized in that the pipe walls of the exhaust ducts are provided with known vibrating devices of a mechanical or acoustic type. 2. Betrieb einer Reinigungsvorrichtung an den Rohrwänden der Abgasschächte nach Anspruch 1, gekennzeichnet durch Rütteln, Schwingen oder Schlagen der Rohrwände. 3. Betrieb einer Reinigungsvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Reinigungsbewegung quer oder/und in Achsrichtung der Rohrwände erfolgt. 4. Betrieb einer Reinigungsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Rohrwände periodischen oder aperiodischen Schwingun,gen zur Reinigung unterworfen sind. 5. Betrieb einer Reinigungsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die gesamten Rohrwände oder einzelne Teile davon in solche Schwingungen zu versetzen sind, die der Eigenfrequenz der Heizflächen entsprechen, mit der Maßgabe, durch Resonanz größere Schwingungsausschläge oder geringere Anfachkräfte zu erzielen. 6. Betrieb einer Reinigungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als akustischeReinigungsvorrichtung an sichbekannte Magnetostriktionsschwinger, deren Felder sich zweckmäßigerweise an den Stellen der stärksten Ansätze überdecken, Anwendung finden. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 851498, 719 718, 560;705, 311 117; Patentschriften Nr. 6 446 und 7 160 des Amtes für Erfindungs- und Patentwesen in der sowjetischen Besatzungszone Deutschlands; schweizerische Patentschrift Nr. 154 299; französische Patentschriften Nr. 890 962, 1045 678; USA.-Patentschrift Nr. 2 550 676. 2. Operation of a cleaning device on the pipe walls of the exhaust ducts according to claim 1, characterized by shaking, swinging or hitting the pipe walls. 3. Operation of a cleaning device according to claim 2, characterized in that the cleaning movement takes place transversely and / or in the axial direction of the pipe walls. 4. Operation of a cleaning device according to claim 3, characterized in that the tube walls are subjected to periodic or aperiodic vibrations, gene for cleaning. 5. Operation of a cleaning device according to claim 3, characterized in that the entire pipe walls or individual parts thereof are to be set in such vibrations that correspond to the natural frequency of the heating surfaces, with the proviso that greater oscillation amplitudes or lower initial forces can be achieved by resonance. 6. Operation of a cleaning device according to claim 1, characterized in that magnetostriction oscillators known per se, the fields of which expediently overlap at the points of the strongest approaches, are used as the acoustic cleaning device. Considered publications: German Patent Nos. 851 498, 719 718, 560; 705, 311 117; Patent Nos 6446 and 7160 of the Office for Inventions and Patents in the Soviet zone of Germany. Swiss patent specification No. 154 299; French Patent Nos. 890 962, 1 045 678; U.S. Patent No. 2,550,676.
DED25692A 1957-05-28 1957-05-28 Cleaning device to prevent the build-up of iron bears in the exhaust gas ducts of converters when hot metal is blown Pending DE1083289B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED25692A DE1083289B (en) 1957-05-28 1957-05-28 Cleaning device to prevent the build-up of iron bears in the exhaust gas ducts of converters when hot metal is blown

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED25692A DE1083289B (en) 1957-05-28 1957-05-28 Cleaning device to prevent the build-up of iron bears in the exhaust gas ducts of converters when hot metal is blown

Publications (1)

Publication Number Publication Date
DE1083289B true DE1083289B (en) 1960-06-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
DED25692A Pending DE1083289B (en) 1957-05-28 1957-05-28 Cleaning device to prevent the build-up of iron bears in the exhaust gas ducts of converters when hot metal is blown

Country Status (1)

Country Link
DE (1) DE1083289B (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE311117C (en) *
DE6446C (en) * E. HÄNEL JR., Fabrikbesitzer, in Sudenburg-Magdeburg Charcoal glowing cylinder with an inner heating tube
DE7160C (en) * A. LOCQUENEAUX, Bäcker, in La-Ferte-Chevresis (Aisne), Frankreich Bottle washer
CH154299A (en) * 1931-03-12 1932-04-30 Sulzer Ag Device for cleaning the tubes of heat exchangers such as evaporators and superheaters.
DE560705C (en) * 1931-03-21 1932-10-06 Borsig G M B H A Device for removing fly ash and other combustion residues from pipe coils
DE719718C (en) * 1937-11-16 1942-04-15 Mont Kessel Herpen & Co K G Device for removing dirt on the flue gas side from heating surfaces formed from pipe coils
FR890962A (en) * 1942-02-13 1944-02-23 Mont Kessel Fireplace with a grid made up of mobile tubes cooled by water
US2550676A (en) * 1945-06-20 1951-05-01 Dalin David Combined waste-heat boiler and chemical recovery unit
DE851498C (en) * 1944-06-10 1952-10-06 Mont Kessel Herpen & Co K G Steam generator with partitions dividing the combustion chamber
FR1045678A (en) * 1950-12-29 1953-11-30 Method and device for cleaning and, more particularly for removing dust from external heat exchange surfaces of tubes, coils, or the like

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE311117C (en) *
DE6446C (en) * E. HÄNEL JR., Fabrikbesitzer, in Sudenburg-Magdeburg Charcoal glowing cylinder with an inner heating tube
DE7160C (en) * A. LOCQUENEAUX, Bäcker, in La-Ferte-Chevresis (Aisne), Frankreich Bottle washer
CH154299A (en) * 1931-03-12 1932-04-30 Sulzer Ag Device for cleaning the tubes of heat exchangers such as evaporators and superheaters.
DE560705C (en) * 1931-03-21 1932-10-06 Borsig G M B H A Device for removing fly ash and other combustion residues from pipe coils
DE719718C (en) * 1937-11-16 1942-04-15 Mont Kessel Herpen & Co K G Device for removing dirt on the flue gas side from heating surfaces formed from pipe coils
FR890962A (en) * 1942-02-13 1944-02-23 Mont Kessel Fireplace with a grid made up of mobile tubes cooled by water
DE851498C (en) * 1944-06-10 1952-10-06 Mont Kessel Herpen & Co K G Steam generator with partitions dividing the combustion chamber
US2550676A (en) * 1945-06-20 1951-05-01 Dalin David Combined waste-heat boiler and chemical recovery unit
FR1045678A (en) * 1950-12-29 1953-11-30 Method and device for cleaning and, more particularly for removing dust from external heat exchange surfaces of tubes, coils, or the like

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