EP0096909B1 - Dispositif pour renverser la marche des gaz captés au bec des convertisseurs - Google Patents

Dispositif pour renverser la marche des gaz captés au bec des convertisseurs Download PDF

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Publication number
EP0096909B1
EP0096909B1 EP83200680A EP83200680A EP0096909B1 EP 0096909 B1 EP0096909 B1 EP 0096909B1 EP 83200680 A EP83200680 A EP 83200680A EP 83200680 A EP83200680 A EP 83200680A EP 0096909 B1 EP0096909 B1 EP 0096909B1
Authority
EP
European Patent Office
Prior art keywords
pressure
valves
bell
gas
switching
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
EP83200680A
Other languages
German (de)
English (en)
Other versions
EP0096909A1 (fr
Inventor
Karl Steinbacher
Horst Hemmerling
Alfred Knieper
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0096909A1 publication Critical patent/EP0096909A1/fr
Application granted granted Critical
Publication of EP0096909B1 publication Critical patent/EP0096909B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/38—Removal of waste gases or dust
    • C21C5/40—Offtakes or separating apparatus for converter waste gases or dust

Definitions

  • the invention relates to a device for pressure-free switching of the gas stream from a converter from flare mode to gasometer mode and vice versa, consisting of a housing with a gas inlet cross section and two gas outlet cross sections, with shut-off devices including drives and with measuring and control devices.
  • a CO-containing gas with a calorific value of 8000 or more kJ / Nm 3 is generated during the blowing phase, which is collected in modern systems after appropriate cleaning in a gasometer for further use.
  • a switchover device must be provided in the exhaust pipe. In converter operation, however, not only does the composition of the exhaust gas change over an entire cycle, there are also different amounts of exhaust gas to which the blower output has to be adjusted.
  • the dedusting device acts like a throttle, so that pressure surges as a result of the switchover upstream can scarcely have an effect up to the area of the suction hood above the converter.
  • the switchover device must be designed much more carefully and the control of the blower must work much more precisely if a disturbance in the pressure conditions in the area of the suction hood is to be excluded.
  • This known switching device is relatively complex and complicated.
  • the main disadvantage is that it has poor control characteristics.
  • the known device is unsuitable for systems with dry gas dedusting because the changeover process cannot take place without pressure surges and because it cannot satisfactorily compensate for operational fluctuations in gas pressure and gas flow.
  • the bell valves preferably have the same characteristic curve and flow cross sections of the same size.
  • the bell valves have a metal-metal seal and a closing pressure of at least 3 times the gasometer pressure.
  • the device according to the invention has the advantage that only two actuators are required which simultaneously regulate the switching process and alternately securely seal the two outgoing gas lines.
  • the bell valves By designing the bell valves with an equal percentage characteristic the converter gas flow can be switched between the two operating modes without pressure surges.
  • the independent actuation of the bell valves ensures that, in addition to overcoming the static pressure in the gasometer line, the required dynamic pressure increase is also mastered, a prerequisite for preventing gases from floating out of the suction hood above the converter during the switchover process .
  • 10 denotes a housing into which a gas line 4 opens and from which two gas lines 7 and 8 extend.
  • the converter gas is conveyed into the housing 10 by means of a fan 3 and, depending on the position of the bell valves 1 and 2, is passed on via line 7 into the gasometer or via line 8 into the flare stack 9.
  • the drives for the bell valves 1 and 2 are designated.
  • valve position corresponds to phase 1 in FIG. 3.
  • valve 2 is completely closed, while valve 1 is now fully open.
  • the exit cross section to line 8 and to the flare 9 is thus blocked, while the exit cross section to line 7 and thus to the gasometer is fully open.
  • the two drives 5 and 6 for the bell valves 1 and 2 work independently of one another and thereby allow an absolutely pressure surge-free transition between the two operating states of the switchover station.
  • the two bell valves 1 and 2 have a special contour, as shown once again on a larger scale in FIG. 2a.
  • FIG. 2b shows the associated control characteristic curve, the characteristic variable kv being plotted over the stroke.
  • FIG. 3a the curves V 1 and V 2 indicate the position of the bell valves during flaring operation (phase 1), during the switchover (phase 2) and during gasometer operation (phase 3).
  • the associated pressure conditions are shown in FIG. 3a.
  • the gas pressure upstream of the valve is, for example, 2 mbar above the external pressure, while in gasometer operation it is, for example, 5 mbar above the gasometer pressure of, for example, 40 mbar.
  • Switching to gasometer operation begins with the closing of valve 2 until a certain pressure is reached via valve 1. Then valve 1 opens at a constant speed, valve 2 closing further. Valve 2 is completely closed after valve 1 has reached its open position.
  • valve 1 When switching to torch mode, valve 1 first moves to the infeed position; as soon as this is reached, valve 2 is opened.
  • the gas flow can pressure surge free, fast and Torch mode can be switched to gasometer mode and vice versa.
  • the device is comparatively simple in construction and at the same time fulfills control and sealing functions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Control Of Fluid Pressure (AREA)
  • Flow Control (AREA)
  • Chimneys And Flues (AREA)

Claims (4)

1. Dispositif pour commuter, sans à-coup de pression, le courant gazeux sortant d'un convertisseur, du fonctionnement en liaison avec une torchère au fonctionnement en liaison avec un gazomètre,et inversement, constitué par un carter comportant une section transversale d'admission du gaz et deux sections transversales de sortie du gaz, avec des dispositifs de fermeture ainsi que des dispositifs d'entraînement et des dispositifs de mesure et de régulation, caractérisé par le fait gu'il est prévu, convne dispositifs de fermeture pour les sections transversales de sortie, des soupapes à cloche possédant des courbes caractéristigues à pourcentage approximativement identique , et des dispositifs d'entraînement opérant d'une maniere indépendante les uns des autres.
2. Dispositif suivant la revendication 1, caractérisé par le fait que les deux soupapes à cloche possedent la même courbe caractéristique.
3. Dispositif suivant la revendication 1, caractérisé par le fait que les deux soupapes à cloche possèdent des sections transversales d'écoulement identiques.
4. Dispositif suivant l'une des revendications 1 à 3, caractérisé par le fait que les soupapes à cloche possèdent une étanchéité métal sur métal et une pression de fermeture égale au moins au triple de la pression du gazomètre .
EP83200680A 1982-06-16 1983-05-13 Dispositif pour renverser la marche des gaz captés au bec des convertisseurs Expired EP0096909B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823222599 DE3222599A1 (de) 1982-06-16 1982-06-16 Umschaltvorrichtung fuer einnen konverter-gasstrom
DE3222599 1982-06-16

Publications (2)

Publication Number Publication Date
EP0096909A1 EP0096909A1 (fr) 1983-12-28
EP0096909B1 true EP0096909B1 (fr) 1986-02-26

Family

ID=6166187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200680A Expired EP0096909B1 (fr) 1982-06-16 1983-05-13 Dispositif pour renverser la marche des gaz captés au bec des convertisseurs

Country Status (3)

Country Link
EP (1) EP0096909B1 (fr)
JP (1) JPS596312A (fr)
DE (2) DE3222599A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE481132C (de) * 1929-08-14 Karl Wolinski Hydraulisch betriebene Ventilumsteuerungsvorrichtung fuer regenerativ geheizte OEfen
GB263165A (en) * 1925-12-16 1927-06-09 Silica En Ovenbouw Mij Nv Improvements in distributing valves for regenerative ovens or furnaces heated by gas
GB1002585A (en) * 1961-04-10 1965-08-25 Yawata Iron & Steel Co Apparatus for selective recovery of waste gas from oxygen top blowing converter
FR2458592A1 (fr) * 1979-06-07 1981-01-02 Creusot Loire Ensemble d'aiguillage pour la recuperation des gaz de convertisseurs d'acierie
DE3043643C2 (de) * 1980-11-19 1983-09-01 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen Anlage für die Konvertergasspeicherung

Also Published As

Publication number Publication date
DE3222599A1 (de) 1983-12-22
EP0096909A1 (fr) 1983-12-28
JPS596312A (ja) 1984-01-13
JPH0321605B2 (fr) 1991-03-25
DE3362261D1 (en) 1986-04-03

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