EP0054739B1 - Process and apparatus for the quenching of coal-coke in particular - Google Patents

Process and apparatus for the quenching of coal-coke in particular Download PDF

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Publication number
EP0054739B1
EP0054739B1 EP81109460A EP81109460A EP0054739B1 EP 0054739 B1 EP0054739 B1 EP 0054739B1 EP 81109460 A EP81109460 A EP 81109460A EP 81109460 A EP81109460 A EP 81109460A EP 0054739 B1 EP0054739 B1 EP 0054739B1
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EP
European Patent Office
Prior art keywords
quenching
water
coke
phase
extinguishing
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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
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EP81109460A
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German (de)
French (fr)
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EP0054739A1 (en
Inventor
Wilhelm Ing. Grad. Mosebach
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RAG AG
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Ruhrkohle AG
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Publication of EP0054739A1 publication Critical patent/EP0054739A1/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B39/00—Cooling or quenching coke
    • C10B39/04—Wet quenching
    • C10B39/08—Coke-quenching towers

Definitions

  • the invention relates to a method and a device for wet extinguishing, in particular hard coal coke, in which the coke is brought to an extinguishing tower on an open fire-fighting vehicle and is sprinkled with water in an extinguishing hood forming the lower part of the fire-extinguishing tower, which consists of pipes of an extinguishing spray with essentially uniform pressure is brought out, whereby the quenching fumes are discharged to the outside through a chimney connected to the quenching hood.
  • the coke When extinguishing, the coke absorbs water because the extinguishing water can penetrate the pores of hot coke unlike cold coke.
  • the requirements of the smelters for the coke pieces have become lower because a coke with a grain size of over 25 mm is considered suitable for iron production.
  • the requirements for the final water content of the coke are still strict.
  • the customers demand compliance with a specified minimum final water content in the coke, not least because exceeding the water content leads to losses of usable coke mass. Maintaining the relatively low final water content in coke is more difficult with fine coke than with coarse coke.
  • the object of the invention is to extinguish the coke in such a way that low emission values in the extinguishing swaths can be maintained or even fallen below.
  • this is achieved in that the task of the extinguishing water is started before the fire truck is retracted into the fire hood, after the fire truck is driven into the fire hood in an initial fire-extinguishing phase, the fire water is increased very quickly to the maximum amount and thereby a cross-section of Extinguishing hood covering the extinguishing water is generated, and then the extinguishing water quantity is reduced again during a considerably longer final extinguishing phase compared to the initial extinguishing phase, the maximum extinguishing water quantity given in the time unit corresponding to the extinguishing water quantity given in the final extinguishing phase. how about 2: 1 behaves.
  • the extinguishing water quantity is very quickly increased to a maximum value after the extinguishing car has been set up in the initial extinguishing phase of coke extinguishing, the dust particles are washed out of the resulting water vapor in a very dense water curtain, which in turn prevents dust particles from entering the area of the extinguishing tower above the fire hood.
  • the amount of water can be greatly reduced because after the coke surface has been extinguished, no more dust particles are produced.
  • the fine coke is also less moistened, so that the final water content can be maintained or signed.
  • the lower part of an extinguishing tower, generally designated 1, is designed as a fire truck hall 2.
  • the fire truck with the fire 4 shown generally and schematically at 3 in FIG. 2 can be driven in.
  • Above the fire truck hall 2 extends the lower part of the fire tower 1 forming extinguishing hood 5, in which a plurality of horizontal pipes 6 are laid, which have nozzles 7 on their upper side for the discharge of extinguishing water.
  • the tubes 6 run in the longitudinal direction of the fire truck track in the fire truck hall 2 as shown in FIG. 2 larger than the one on the right. This ensures that the coke is evenly sprinkled when it is extinguished.
  • the pipes 6 are supplied with extinguishing water from pipes 8 or 9 at right angles thereto and a riser 10.
  • the riser pipe 10 is connected via a bend 11 to a down pipe 12, which can be supplied with fire-fighting water tanks 15, 16 via branch pipes 13, 14.
  • the extinguishing water tanks 15, 16 are arranged above the hood 5 next to the chimney 17 adjoining it. They are fed with fresh water from a common line 18 via branch lines 19, 20.
  • the extinguishing spray, generally designated 26, is always subjected to the same pressure from the two extinguishing water containers 15, 16.
  • Quick-closing valves are used for this purpose, which are shown schematically at 22 and 23 in FIG.
  • a control element 24 is seated in the connecting pipe bend 11. This is a control flap which can change the flow cross section and is adjustable with an electric drive.
  • the flap position is changed with the electric adjustment device so that in a second phase significantly less extinguishing water escapes, which is shown by the height of the nozzle jets at 31 in FIG. 1.
  • the system is designed as follows:

Description

Die Erfindung betrifft ein Verfahren und eine Einrichtung zum Naßlöschen von insbesondere Steinkohlenkoks, bei dem der Koks auf einem offenen Löschwagen zu einem Löschturm gebracht und in einer das Unterteil des Löschturmes bildenden Löschhaube mit Wasser berieselt wird, das aus Rohren einer Löschbrause mit im wesentlichen gleichförmigem Druck zum Austreten gebracht wird, wobei die Lösch schwaden durch einen an die Löschhaube anschließendenden Kamin nach außen abgeleitet werden.The invention relates to a method and a device for wet extinguishing, in particular hard coal coke, in which the coke is brought to an extinguishing tower on an open fire-fighting vehicle and is sprinkled with water in an extinguishing hood forming the lower part of the fire-extinguishing tower, which consists of pipes of an extinguishing spray with essentially uniform pressure is brought out, whereby the quenching fumes are discharged to the outside through a chimney connected to the quenching hood.

Beim Löschen nimmt der Koks Wasser auf, weil das Löschwasser bei heißem Koks anders als bei kaltem Koks in die Poren eindringen kann. Beim Eintritt des Wassers in die Koksporen und bei der mit dem Löschen verbundenen Temperaturherabsetzung des Kokses entstehen Spannungen, welche Partikel aus der Koksmasse absprengen, die als Staub mitgerissen werden oder den Koks im Löschwagen zerkleinern. Man bemüht sich daher, das Löschen möglichst schonend durchzuführen. Allerdings sind die Anforderungen der Hütten an die Koksstückigkeit geringer geworden, weil für die Eisengewinnung ein Koks von einer Korngröße von über 25 mm als geeignet gilt.When extinguishing, the coke absorbs water because the extinguishing water can penetrate the pores of hot coke unlike cold coke. When the water enters the coke spores and when the temperature of the coke is reduced due to the extinguishing, tensions arise, which detach particles from the coke mass, which are entrained as dust or crush the coke in the fire truck. One tries therefore to carry out the deletion as gently as possible. However, the requirements of the smelters for the coke pieces have become lower because a coke with a grain size of over 25 mm is considered suitable for iron production.

Andererseits sind die Anforderungen an den Endwassergehalt des Kokses nach wie vor streng. Die Abnehmer verlangen die Einhaltung eines vorgegebenen Minimalendwassergehaltes im Koks nicht zuletzt deswegen, weil die Überschreitung des Wassergehaltes zu Verlusten an verwertbarer Koksmasse führt. Die Einhaltung des verhältnismäßig niedrigen Endwassergehaltes im Koks ist bei feinem Koks jedoch schwieriger als bei grobem Koks.On the other hand, the requirements for the final water content of the coke are still strict. The customers demand compliance with a specified minimum final water content in the coke, not least because exceeding the water content leads to losses of usable coke mass. Maintaining the relatively low final water content in coke is more difficult with fine coke than with coarse coke.

Um den Endwassergehalt in den verschiedenen Körnungen des Kokses einerseits so niedrig wie möglich und andererseits möglichst gleichmäßig zu halten, ist ein Verfahren bekannt, das man mit Sturzlöschung bezeichnet. Hierbei wird das Löschen des Kokses auf dem Löschwagen in aufeinanderfolgenden Intervallen mit großen Löschwassermengen in den einzelnen Löschphasen durchgeführt. Das Verfahren hat jedoch den Nachteil, daß hierbei starke Emissionen auftreten.In order to keep the final water content in the different grain sizes of the coke as low as possible on the one hand and as uniform as possible on the other hand, a process is known which is called fall extinguishing. Here, the coke is extinguished on the fire truck in successive intervals with large amounts of fire water in the individual fire phases. However, the method has the disadvantage that strong emissions occur here.

Neuerdings werden bei den Kokereien jedoch scharfe Auflagen für die beim Kokslöschen auftretenden Emissionen gemacht, die nicht überschritten werden dürfen. Mit den bekannten und in großer Zahl auf den Kokereien vorhandenen Löschtürmen läßt sich diese Auflage nicht erfüllen, weil die Löschschwaden zu große Mengen insbesondere an Koksstaub mitreißen. Man muß deshalb zur Einhaltung der Emissionsauflagen dazu übergehen, durch Einbauten in den an die Löschhaube anschließenden Kamin des Turmes dort die Staubteilchen abzuscheiden. Diese Maßnahmen lassen sich bei vorhandenen Löschtürmen aber, wenn überhaupt hur in unzureichendem Maße verwirklichen. Deshalb setzen verschärfte Auflagen in der Regel den Neubau des Löschturmes voraus. Dabei kann man durch Vergrößerung der entscheidenden Turmquerschnitte die Schwadengeschwindigkeit herabsetzen bzw. Einbauten vorsehen, wodurch weniger Staubpartikel mitgerissen werden. Der Neubau der Löschtürme ist jedoch außerordentlich aufwendig.Recently, however, the coking plants have imposed strict requirements for the emissions that occur during coke quenching, which must not be exceeded. This requirement cannot be met with the known extinguishing towers which are present in large numbers on the coking plants, because the extinguishing vapors entrain too large quantities, in particular of coke dust. To comply with the emission requirements, it is therefore necessary to separate the dust particles there by installing in the chimney of the tower connected to the fire hood. These measures can, however, be insufficiently implemented, if at all, with existing extinguishing towers. For this reason, stricter requirements generally require the new fire-fighting tower to be built. The swath speed can be reduced or internals can be provided by enlarging the decisive tower cross-sections, which means that fewer dust particles are entrained. However, the construction of the fire-fighting towers is extremely complex.

Der Erfindung liegt die Aufgabe zugrunde, den Koks so abzulöschen, daß sich niedrige Emissionswerte in den Löschschwaden einhalten bzw. sogar unterschreiten lassen.The object of the invention is to extinguish the coke in such a way that low emission values in the extinguishing swaths can be maintained or even fallen below.

Nach der Erfindung wird das dadurch erreicht, daß mit der Aufgabe des Löschwassers vor dem Einfahren des Löschwagens in die Löschhaube begonnen wird, nach dem Einfahren des Löschwagens in die Löschhaube in einer Anfangslöschphase das Löschwasser sehr schnell auf die Maximalmenge gesteigert und dabei ein den Querschnitt der Löschhaube abdeckender Löschwasserschleier erzeugt wird, und anschließend während einer zeitlich gegenüber der Anfangslöschphase wesentlich längeren Endlöschphase die Löschwassermenge wieder vermindert wird, wobei sich die in der Zeiteinheit aufgegebene Löschwassermaximalmenge der Anfangslöschphase zu der in der Endlöschphase aufgegebenen Löschwassermenge. wie etwa 2 : 1 verhält.According to the invention this is achieved in that the task of the extinguishing water is started before the fire truck is retracted into the fire hood, after the fire truck is driven into the fire hood in an initial fire-extinguishing phase, the fire water is increased very quickly to the maximum amount and thereby a cross-section of Extinguishing hood covering the extinguishing water is generated, and then the extinguishing water quantity is reduced again during a considerably longer final extinguishing phase compared to the initial extinguishing phase, the maximum extinguishing water quantity given in the time unit corresponding to the extinguishing water quantity given in the final extinguishing phase. how about 2: 1 behaves.

Da nach dem Aufstellen des Löschwagens in der Anfangslöschphase des Kokslöschens die Löschwassermenge sehr schnell auf einen Maximalwert gesteigert wird, findet das Auswaschen der Staubteilchen aus den hierbei entstehenden Wasserschwaden in einem sehr dichten Wasserschieier statt, der seinerseits verhindert, daß Staubpartikel in den Bereich des Löschturmes oberhalb der Löschhaube gelangen können. In der an diese. Phase anschließenden, wesentlich längeren Endlöschphase läßt sich die Wassermenge stark vermindern, weil nach dem Ablöschen der Koksoberfläche keine Staubpartikel mehr entstehen. In der in der Endlöschphase verminderten Wassermenge wird auch der feine Koks weniger stark befeuchtet, so daß sich der Endwassergehalt einhalten bzw. unterschreiben läßt.Since the extinguishing water quantity is very quickly increased to a maximum value after the extinguishing car has been set up in the initial extinguishing phase of coke extinguishing, the dust particles are washed out of the resulting water vapor in a very dense water curtain, which in turn prevents dust particles from entering the area of the extinguishing tower above the fire hood. In the of this. Phase, subsequent, much longer final extinguishing phase, the amount of water can be greatly reduced because after the coke surface has been extinguished, no more dust particles are produced. In the amount of water reduced in the final extinguishing phase, the fine coke is also less moistened, so that the final water content can be maintained or signed.

Die Einzelheiten, weiteren Merkmale und andere Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung einer Ausführungsform anhand der Figuren in der Zeichnung ; es zeigen :

  • Figur 1 in Seitenansicht eine Einrichtung zur Durchführung des neuen Verfahrens und
  • Figur 2 eine Stirnansicht des Gegenstandes der Fig. 1.
The details, further features and other advantages of the invention result from the following description of an embodiment with reference to the figures in the drawing; show it :
  • Figure 1 in side view of a device for performing the new method and
  • FIG. 2 shows an end view of the object of FIG. 1.

Das Unterteil eines allgemein mit 1 bezeichneten Löschturmes ist als Löschwagenhalle 2 ausgebildet. In der Löschwagenhalle 2 kann der allgemein und schematisch bei 3 in Fig. 2 wiedergegebene Löschwagen mit dem Brand 4 eingefahren werden. Oberhalb der Löschwagenhalle 2 erstreckt sich eine das Unterteil des Löschturmes 1 bildende Löschhaube 5, in der eine Mehrzahl von horizontalen Rohren 6 verlegt ist, die auf ihrer Oberseite Düsen 7 zum Austritt von Löschwasser aufweisen. Die Rohre 6 verlaufen gemäß der Darstellung nach Fig. 2 in Längsrichtung des Löschwagengleises in der Löschwagenhalle 2. Die Rohre 6 sind in einem der Koksschichthöhe im Löschwagen 3 entsprechenden ungleichmäßigen Abstand angeordnet, d. h., die Dichte der Düsen 7 ist im linken Teil der Fig. 2 größer als im rechten. Dadurch wird eine gleichmäßige Berieselung des Kokses beim Löschen erzielt.The lower part of an extinguishing tower, generally designated 1, is designed as a fire truck hall 2. In the fire truck hall 2, the fire truck with the fire 4, shown generally and schematically at 3 in FIG. 2, can be driven in. Above the fire truck hall 2 extends the lower part of the fire tower 1 forming extinguishing hood 5, in which a plurality of horizontal pipes 6 are laid, which have nozzles 7 on their upper side for the discharge of extinguishing water. The tubes 6 run in the longitudinal direction of the fire truck track in the fire truck hall 2 as shown in FIG. 2 larger than the one on the right. This ensures that the coke is evenly sprinkled when it is extinguished.

Die Rohre 6 werden aus dazu rechtwinkligen Rohren 8 bzw. 9 und einer Steigleitung 10 mit Löschwasser beaufschlagt. Die Steigleitung 10 ist über einen Krümmer 11 mit einer Falleitung 12 verbunden, die über Zweigrohre 13, 14 aus Löschwasserbehältern 15, 16 beaufschlagt werden kann. Die Löschwasserbehälter 15, 16 sind oberhalb der Haube 5 neben dem daran anschließenden Kamin 17 angeordnet. Sie werden aus einer gemeinsamen Leitung 18 über Zweigleitungen 19, 20 mit Frischwasser gespeist.The pipes 6 are supplied with extinguishing water from pipes 8 or 9 at right angles thereto and a riser 10. The riser pipe 10 is connected via a bend 11 to a down pipe 12, which can be supplied with fire-fighting water tanks 15, 16 via branch pipes 13, 14. The extinguishing water tanks 15, 16 are arranged above the hood 5 next to the chimney 17 adjoining it. They are fed with fresh water from a common line 18 via branch lines 19, 20.

Das erfolgt über mehrere Pumpen, deren Zuleitungen schematisch in Fig. 2 dargestellt sind, wobei die Leitung 18 über eine Rückschlagklappe 25 gesichert ist.This takes place via several pumps, the feed lines of which are shown schematically in FIG. 2, the line 18 being secured by a non-return valve 25.

Die allgemein mit 26 bezeichnete Löschbrause wird aus den beiden Löschwasserbehältern 15, 16 stets mit gleichem Druck beaufschlagt. Dazu dienen Schnellschlußventile, die bei 22 und 23 schematisch in Fig. 1 jeweils am unteren Ende der Fall-Leitung 12 und am unteren Ende der Steigleitung 10 wiedergegeben sind. In dem Verbindungsrohrbogen 11 sitzt ein Regelorgan 24. Dabei handelt es sich um eine Regelklappe, welche den Strömungsquerschnitt verändern kann und mit einem elektrischen Antrieb verstellbar ist.The extinguishing spray, generally designated 26, is always subjected to the same pressure from the two extinguishing water containers 15, 16. Quick-closing valves are used for this purpose, which are shown schematically at 22 and 23 in FIG. A control element 24 is seated in the connecting pipe bend 11. This is a control flap which can change the flow cross section and is adjustable with an electric drive.

Nach dem Einfahren des Löschwagens 3 in die Position unter der Löschbrause 26 wird in der Anfangslöschphase des Löschvorganges eine maximale Löschwassermenge an der Regelklappe 24 erstellt. Das ist schematisch durch die Höhe der aus den nach oben gerichteten Düsen 7 austretenden Strahlen bei 30 in den Fig. 1 und 2 wiedergegeben. Diese Phase dauert etwa 20 sec.After the fire-fighting vehicle 3 has been moved into the position under the fire-fighting spray 26, a maximum amount of fire-fighting water is created on the control flap 24 in the initial fire-fighting phase. This is shown schematically by the height of the jets emerging from the upwardly directed nozzles 7 at 30 in FIGS. 1 and 2. This phase lasts about 20 seconds.

Danach wird mit dem elektrischen Verstellgerät die Klappenstellung so geändert, daß in einer zweiten Phase wesentlich weniger Löschwasser austritt, was durch die Höhe der Düsenstrahlen bei 31 in Fig. 1 wiedergegeben ist.Thereafter, the flap position is changed with the electric adjustment device so that in a second phase significantly less extinguishing water escapes, which is shown by the height of the nozzle jets at 31 in FIG. 1.

Bei einer praktischen Ausführungsform ist die Anlage wie folgt ausgebildet :

Figure imgb0001
In a practical embodiment, the system is designed as follows:
Figure imgb0001

Wasseraufgabe vor Eintritt in den Löschturm

  • mittlere Löschintensität 14,55 Ifs x t Koks
  • größte Löschintensität (20 sec) 26,0 Ifs x t Koks
  • kleinste Löschintensität (105 s) 12,35 i/s x t Koks
Water supply before entering the extinguishing tower
  • average extinguishing intensity 14.55 Ifs xt coke
  • highest extinguishing intensity (20 sec) 26.0 Ifs xt coke
  • lowest extinguishing intensity (105 s) 12.35 i / sxt coke

Löschbrause 8 Rohrstränge mit 1" (25,40 mm) Rohrausläufen nach oben gerichtet.Extinguishing spray 8 pipe strings with 1 "(25.40 mm) pipe outlets directed upwards.

Bei dieser Anlage muß der Emissionswert unter 100 g/t Koks liegen. Die Messungen ergaben an drei hintereinanderliegenden Tagen folgende Auswurfwerte :

  • 59,0 g/t Koks
  • 76,6 g/t Koks
  • 60,3 g/t Koks.
With this system, the emission value must be less than 100 g / t coke. The measurements gave the following ejection values on three days in a row:
  • 59.0 g / t coke
  • 76.6 g / t coke
  • 60.3 g / t coke.

Claims (3)

1. A process for the wet-quenching of, in particular, coke, in which the coke is transported on an open quenching conveyance to a quenching tower and sprayed with water in a quenching hood formed in the lower part of the quenching tower, the water being sprayed from pipes of a quenching rose at essentially uniform pressure, and the quenching damp is led out through a chimney connected to the quenching hood, characterised in that, from the introduction of the quenching water before starting transport of the quenching conveyance (3) into the quenching hood (5), to the transport of the quenching conveyance (3) into the quenching hood (5), in an initial quenching phase, the amount of quenching water is increased very quickly to the maximum amount and a quenching water screen covering the cross-section of the quenching hood (5) is thereby generated, and the quenching water amount is then reduced over a considerably longer final quenching phase, relative to the initial quenching phase, in which the ratio of the maximum amount of quenching water introduced in the time unit of the initial quenching phase to the quenching water introduced in the final quenching phase is about 2 : 1.
2. A process according to claim 1, characterised in that, for a charge of 16 t, and with an amount of quenching water of 30 m3 per charge, the maximum amount of quenching water in the initial phase of 20 sec is 26.0 I/s x t coke and the minimum amount of quenching water introduced over 105 sec in the final phase is 12.35 I/s x t coke.
3. Apparatus for conducting the process according to claim 1 in a coke quenching tower without installations for the separation of powders which are emitted, characterised by a sealing and regulating valve in the quenching water conduit (10-12) to the quenching rose (26).
EP81109460A 1980-12-24 1981-10-31 Process and apparatus for the quenching of coal-coke in particular Expired EP0054739B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803049157 DE3049157A1 (en) 1980-12-24 1980-12-24 "METHOD AND DEVICE FOR WET-DELETING IN PARTICULAR CHARCOAL COCKS"
DE3049157 1980-12-24

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EP0054739A1 EP0054739A1 (en) 1982-06-30
EP0054739B1 true EP0054739B1 (en) 1985-03-13

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Publication number Priority date Publication date Assignee Title
US5827403A (en) * 1996-07-10 1998-10-27 Citgo Petroleum Corporation Method of designing and manufacturing a delayed coker drum
US5795445A (en) * 1996-07-10 1998-08-18 Citgo Petroleum Corporation Method of controlling the quench of coke in a coke drum
US6039844A (en) * 1998-10-09 2000-03-21 Citgo Petroleum Corporation Containment system for coke drums
CN104479694B (en) * 2014-12-17 2016-06-29 太原重工股份有限公司 A kind of coke oven Jiao bucket unloads the dust arrester of Jiao

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Publication number Priority date Publication date Assignee Title
US1677973A (en) * 1925-08-08 1928-07-24 Frank F Marquard Method of quenching coke
DE688300C (en) * 1938-07-08 1940-02-17 Koppers Gmbh Heinrich Coke extinguisher
DE917905C (en) * 1952-04-08 1954-09-13 Koppers Gmbh Heinrich Device for extinguishing glowing coke in a coke extinguishing tower
GB837398A (en) * 1957-12-07 1960-06-15 Koppers Gmbh Heinrich Improvements in or relating to the quenching of hot coke
DE2312907C2 (en) * 1973-03-15 1974-09-12 Dr. C. Otto & Co Gmbh, 4630 Bochum Process for extinguishing the coke fire in coking ovens arranged in batteries
US4025395A (en) * 1974-02-15 1977-05-24 United States Steel Corporation Method for quenching coke
US4113569A (en) * 1975-11-28 1978-09-12 Donner-Hanna Coke Corporation Coke air pollution control method and apparatus
NL7906929A (en) * 1979-09-18 1981-03-20 Estel Hoogovens Bv METHOD FOR THE PRODUCTION OF COKES.

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DE3169286D1 (en) 1985-04-18
US4512850A (en) 1985-04-23
EP0054739A1 (en) 1982-06-30
DE3049157A1 (en) 1982-07-29

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