EP0210435B1 - Verfahren zur Kühlung und Reinigung von Generatorgas und Gichtgas und Vorrichtung zur Durchführung dieses Verfahrens - Google Patents

Verfahren zur Kühlung und Reinigung von Generatorgas und Gichtgas und Vorrichtung zur Durchführung dieses Verfahrens Download PDF

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Publication number
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
Authority
EP
European Patent Office
Prior art keywords
gas
cooling
cleaning unit
cleaning
unit
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.)
Expired - Lifetime
Application number
EP86108610A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0210435A3 (en
EP0210435A2 (de
Inventor
Bogdan Vuletic
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.)
Primetals Technologies Austria GmbH
Deutsche Voest Alpine Industrieanlagenbau GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Deutsche Voest Alpine Industrieanlagenbau 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 Voest Alpine Industrienlagenbau GmbH, Deutsche Voest Alpine Industrieanlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0210435A2 publication Critical patent/EP0210435A2/de
Publication of EP0210435A3 publication Critical patent/EP0210435A3/de
Application granted granted Critical
Publication of EP0210435B1 publication Critical patent/EP0210435B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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.

Landscapes

  • 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)
EP86108610A 1985-07-02 1986-06-24 Verfahren zur Kühlung und Reinigung von Generatorgas und Gichtgas und Vorrichtung zur Durchführung dieses Verfahrens Expired - Lifetime EP0210435B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853524011 DE3524011A1 (de) 1985-07-02 1985-07-02 Verfahren zur kuehlung und reinigung von generatorgas und gichtgas und vorrichtung zur durchfuehrung dieses verfahrens
DE3524011 1985-07-02

Publications (3)

Publication Number Publication Date
EP0210435A2 EP0210435A2 (de) 1987-02-04
EP0210435A3 EP0210435A3 (en) 1989-11-23
EP0210435B1 true EP0210435B1 (de) 1991-08-28

Family

ID=6274999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108610A Expired - Lifetime EP0210435B1 (de) 1985-07-02 1986-06-24 Verfahren zur Kühlung und Reinigung von Generatorgas und Gichtgas und Vorrichtung zur Durchführung dieses Verfahrens

Country Status (14)

Country Link
US (2) US4793857A (enrdf_load_stackoverflow)
EP (1) EP0210435B1 (enrdf_load_stackoverflow)
JP (1) JPH0768526B2 (enrdf_load_stackoverflow)
KR (1) KR940001529B1 (enrdf_load_stackoverflow)
CN (1) CN1011418B (enrdf_load_stackoverflow)
AU (1) AU595532B2 (enrdf_load_stackoverflow)
BR (1) BR8603067A (enrdf_load_stackoverflow)
CA (1) CA1283542C (enrdf_load_stackoverflow)
CS (1) CS274656B2 (enrdf_load_stackoverflow)
DD (1) DD247917A5 (enrdf_load_stackoverflow)
DE (2) DE3524011A1 (enrdf_load_stackoverflow)
IN (1) IN165848B (enrdf_load_stackoverflow)
SU (1) SU1561828A3 (enrdf_load_stackoverflow)
ZA (1) ZA864394B (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354356A (en) * 1992-10-06 1994-10-11 Bechtel Group Inc. Method of providing fuel for an iron making process
US5320676A (en) * 1992-10-06 1994-06-14 Bechtel Group, Inc. Low slag iron making process with injecting coolant
US6197088B1 (en) 1992-10-06 2001-03-06 Bechtel Group, Inc. Producing liquid iron having a low sulfur content
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 (de) 1996-05-15 1999-09-27 Voest Alpine Ind Anlagen Verfahren zur senkung von verunreinigungen im gasstrom und vorrichtung zur durchführung
JPH1157402A (ja) * 1997-08-13 1999-03-02 Mitsubishi Heavy Ind Ltd ガス精製方法及びガス精製設備
AT507003B1 (de) * 2008-06-27 2010-03-15 Siemens Vai Metals Tech Gmbh Prozessgas-reinigungseinrichtung für eine schmelzreduktionsanlage zur gewinnung von roheisen
EP2746408A1 (de) * 2012-12-21 2014-06-25 Siemens VAI Metals Technologies GmbH Überhitzung von einem in einem Reduktionsprozess genutzten Exportgas zum Ausgleich von Mengenschwankungen und Vorrichtung zum dessen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT247385B (de) * 1961-05-16 1966-06-10 Zd Y Na Vyrobu Vzduchotechnick Trockenreinigungsverfahren für Hochofen-(Gicht-)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 (de) * 1980-09-12 1982-07-22 Korf-Stahl Ag, 7570 Baden-Baden Verfahren und Vorrichtung zur direkten Erzeugung von flüssigem Roheisen aus stückigem Eisenerz
SU1479006A3 (ru) * 1984-11-26 1989-05-07 Фоест-Альпине (Фирма) Способ получени жидкого чугуна или продуктов стали и восстановительного газа в плавильном газификаторе

Also Published As

Publication number Publication date
DE3681090D1 (de) 1991-10-02
JPS6284184A (ja) 1987-04-17
SU1561828A3 (ru) 1990-04-30
CN1011418B (zh) 1991-01-30
US4850574A (en) 1989-07-25
EP0210435A3 (en) 1989-11-23
CS274656B2 (en) 1991-09-15
IN165848B (enrdf_load_stackoverflow) 1990-01-27
CS470586A2 (en) 1990-10-12
EP0210435A2 (de) 1987-02-04
DD247917A5 (de) 1987-07-22
KR870001293A (ko) 1987-03-12
AU5855586A (en) 1987-01-22
DE3524011A1 (de) 1987-01-15
CA1283542C (en) 1991-04-30
CN86104420A (zh) 1987-02-04
AU595532B2 (en) 1990-04-05
US4793857A (en) 1988-12-27
ZA864394B (en) 1987-02-25
JPH0768526B2 (ja) 1995-07-26
BR8603067A (pt) 1987-03-17
KR940001529B1 (ko) 1994-02-23
DE3524011C2 (enrdf_load_stackoverflow) 1989-01-05

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