EP0135667B1 - Verfahren und Vorrichtung zur Absenkung des Druckes in den Gichtbunkern eines Hochofens auf nahezu Atmosphärendruck bei gleichzeitiger Rückgewinnung des Gichtgases - Google Patents

Verfahren und Vorrichtung zur Absenkung des Druckes in den Gichtbunkern eines Hochofens auf nahezu Atmosphärendruck bei gleichzeitiger Rückgewinnung des Gichtgases Download PDF

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Publication number
EP0135667B1
EP0135667B1 EP84105481A EP84105481A EP0135667B1 EP 0135667 B1 EP0135667 B1 EP 0135667B1 EP 84105481 A EP84105481 A EP 84105481A EP 84105481 A EP84105481 A EP 84105481A EP 0135667 B1 EP0135667 B1 EP 0135667B1
Authority
EP
European Patent Office
Prior art keywords
pressure
gas
float tank
float
tank
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
Application number
EP84105481A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0135667A2 (de
EP0135667A3 (en
Inventor
Peter Dr.-Ing. Heinrich
Werner Dipl.-Ing. Rettweiler
Hans Dipl.-Ing. Krämer
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.)
MAN Gutehoffnungshutte GmbH
Original Assignee
MAN Gutehoffnungshutte 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 MAN Gutehoffnungshutte GmbH filed Critical MAN Gutehoffnungshutte GmbH
Priority to AT84105481T priority Critical patent/ATE35557T1/de
Publication of EP0135667A2 publication Critical patent/EP0135667A2/de
Publication of EP0135667A3 publication Critical patent/EP0135667A3/de
Application granted granted Critical
Publication of EP0135667B1 publication Critical patent/EP0135667B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/007—Controlling or regulating of the top pressure

Definitions

  • the invention relates to a method for lowering the pressure in the top bunkers of blast furnaces to almost atmospheric pressure with residual relaxation via silencers into the atmosphere with simultaneous recovery of the top gas.
  • DE-PS-3 026 019 describes a method and a device in which the expansion of the top gas from the top bunker takes place automatically in a first step due to the prevailing pressure. In a second process step, the remaining amount of the gas is then sucked off with the aid of an ejector and fed to the clean gas network. The pressure in the gout bunkers can be reduced to atmospheric pressure.
  • a disadvantage of this process is that the gas released in the first process step is only roughly pre-cleaned, so that its dust content increases that of the clean gas.
  • the same also applies to the second process step, which is only made possible by the fact that clean gas with a high pressure level is available between the first gas cleaner and the top pressure control valve for operating the ejector.
  • This constellation does not exist in modern gas cleaning systems (e.g. type Bischoff).
  • the gem. DE-PS-3 026 019 proposed device with respect to lines and fittings very expensive and also requires complex measurement and control technology for switching from the first to the second process step.
  • the system also works with an ejector in accordance with USSR copyright certificate No. 761 567 from 1977.
  • the pressure is released in two steps and via two separate line systems.
  • the pressure in the gout bunker is reduced via an inclined line, which is equipped with a water injection for gas purification purposes.
  • the system switches to the second pipeline system, which also consists of the inclined line with water injection, but is also connected to a vacuum tank.
  • This vacuum container is brought to a pressure below atmospheric pressure by the continuous operation of a steam jet ejector and thus enables the pressure in the top bunkers to be reduced to atmospheric pressure if the vessel pressures and sizes are suitably adjusted.
  • a method and a device have also become known in which the gas to be recovered from the gout bunkers enters a U-shaped buffer container which is open to the atmosphere. On the way there, the gas is cleaned by water injection. After completion of the expansion process, the stored in underground tanks gas is brought to the pressure of the clean gas network and 'fed to the latter. It is advantageous in this embodiment that the pressure is reduced to atmospheric pressure without further mechanical devices. However, it is disadvantageous that ignitable gas / air mixtures can form as a result of free contact with the atmosphere, and that the gas must be brought back to clean gas network pressure.
  • the object of the present invention is to avoid the disadvantages of the above-described methods and devices and to strive for an uncomplicated, reliable system for recovering the gases from the gout bunkers.
  • the weight of the floating container is adjusted so that there is a pressure inside that is slightly above the pressure in the clean gas network.
  • the relaxed gases can be cleaned both in the pipe system in front of the swimming tank and in this itself by spraying water.
  • the separated dust is deposited in sludge form on the bottom part of the floating tank.
  • the swimming tank is monitored by a simple level control. This ensures that gas is released into the clean gas network is interrupted when the swimming tank is at its minimum level. On the other hand, if it is at its maximum level, the further gas supply to the swimming pool is interrupted and, for relaxation, gas still present is released into the atmosphere in a conventional manner via silencers.
  • the blast furnace gas relaxation takes place as follows:
  • Valves 21 a and 21 in the filling line 21 to the top bunkers 1 and 2 are closed.
  • the valves 4 or 5 and 6 in the expansion line 3 behind the top bunkers are opened.
  • the floating roof 8 of the floating container 7 floats upwards in the guide rollers 10.
  • the termination of the relaxation is detected either by the p-measurements 1a or 2a in the gout bunkers 1 or 2 or by time control.
  • valve 6 in the expansion line 3 closes.
  • the valve in the blow-off line 24 to the atmosphere opens for residual relaxation.
  • the valve 18 in the connecting line 17 opens from the swimming tank to the clean gas network, as a result of which gas is fed into the clean gas network.
  • the valve 18 closes as soon as the floating roof 8 of the floating container 7 has reached its minimum position and the minimum limit switch 12 gives a signal or a next relaxation process is initiated.
  • the maximum limit switch 11 reports that the maximum position of the floating roof has been reached. In this case it closes. the valve 6 in the expansion line 3 and opens the valve in the blow-off line 24 to the atmosphere.
  • the cleaning of the relaxed gases is carried out in the swimming tank 7.
  • water is sprayed by means of a pump 14 via the pipeline 13 with the aid of the spray nozzles 15, which are arranged below the floating roof 8.
  • the separated dust collects on the bottom part 9 of the floating container and is drawn off via the sludge discharge 16.
  • this feed and discharge line can alternatively (not shown) also open from above through the floating roof.
  • sliding seals are arranged on the floating roof for the passage of the supply and discharge lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Cleaning In General (AREA)
  • Blast Furnaces (AREA)
EP84105481A 1983-09-28 1984-05-15 Verfahren und Vorrichtung zur Absenkung des Druckes in den Gichtbunkern eines Hochofens auf nahezu Atmosphärendruck bei gleichzeitiger Rückgewinnung des Gichtgases Expired EP0135667B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84105481T ATE35557T1 (de) 1983-09-28 1984-05-15 Verfahren und vorrichtung zur absenkung des druckes in den gichtbunkern eines hochofens auf nahezu atmosphaerendruck bei gleichzeitiger rueckgewinnung des gichtgases.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3335045 1983-09-28
DE19833335045 DE3335045A1 (de) 1983-09-28 1983-09-28 Verfahren und vorrichtung zur absenkung des druckes in den gichtbunkern eines hochofens auf nahezu atmosphaerendruck bei gleichzeitiger rueckgewinnung des gichtgases

Publications (3)

Publication Number Publication Date
EP0135667A2 EP0135667A2 (de) 1985-04-03
EP0135667A3 EP0135667A3 (en) 1986-10-22
EP0135667B1 true EP0135667B1 (de) 1988-07-06

Family

ID=6210246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84105481A Expired EP0135667B1 (de) 1983-09-28 1984-05-15 Verfahren und Vorrichtung zur Absenkung des Druckes in den Gichtbunkern eines Hochofens auf nahezu Atmosphärendruck bei gleichzeitiger Rückgewinnung des Gichtgases

Country Status (3)

Country Link
EP (1) EP0135667B1 (enrdf_load_stackoverflow)
AT (1) ATE35557T1 (enrdf_load_stackoverflow)
DE (1) DE3335045A1 (enrdf_load_stackoverflow)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE919161C (de) * 1950-04-05 1954-10-14 Koppers Gmbh Heinrich Glockengasbehaelter mit Belastungskoerpern
SU761567A1 (ru) * 1977-12-20 1980-09-07 Vni Pi Ochistke T Gazov Система отвода и очистки пылегазовых выбросов из межконусного пространства доменной печи 1
JPS5665908A (en) * 1979-10-30 1981-06-04 Ishikawajima Harima Heavy Ind Co Ltd Blast furnace gas recovery method and its device
DE3245374C1 (de) * 1982-12-08 1984-03-22 Mannesmann AG, 4000 Düsseldorf Verfahren und Einrichtung zum Druckreduzieren von Gichtgasen einer oberen Druckstufe

Also Published As

Publication number Publication date
DE3335045A1 (de) 1985-04-11
DE3335045C2 (enrdf_load_stackoverflow) 1990-10-31
EP0135667A2 (de) 1985-04-03
EP0135667A3 (en) 1986-10-22
ATE35557T1 (de) 1988-07-15

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