EP2234709B1 - Method and plant for removing slag accruing in particular during synthesis gas recovery from a slag bath container - Google Patents

Method and plant for removing slag accruing in particular during synthesis gas recovery from a slag bath container Download PDF

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Publication number
EP2234709B1
EP2234709B1 EP09704328.5A EP09704328A EP2234709B1 EP 2234709 B1 EP2234709 B1 EP 2234709B1 EP 09704328 A EP09704328 A EP 09704328A EP 2234709 B1 EP2234709 B1 EP 2234709B1
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Prior art keywords
slag
container
water
sluice
flow
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EP09704328.5A
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German (de)
French (fr)
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EP2234709A2 (en
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Johannes Kowoll
Eberhard Kuske
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ThyssenKrupp Industrial Solutions AG
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ThyssenKrupp Uhde GmbH
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/52—Ash-removing devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment

Definitions

  • the invention is directed to a method for removing in particular in the syngas recovery obtained slags from a slag bath located in a pressure vessel in a sump for the slag, in the direction of gravity below the slag bath, below the slag if necessary, a device for breaking the slag and a lock valve is provided between the containers, as well as a system for carrying out this method.
  • temperatures in the saturation region for example, already in the first container forming the granules of the slag to be determined, for example. at 200 ° C, which lead at the end of the system with low cooling to a significant vapor formation, which, as stated above, must be avoided.
  • the invention provides in an embodiment that the constriction following a narrowed flow channel in which the slag / water flow is cooled, is provided and / or that generates a countercurrent to the slag stream in the slag collecting / lock container by feeding colder water becomes.
  • a tangential or secant feed of the water to create swirl and to improve the cooling.
  • a particularly favorable procedure, in particular at the end of the slag treatment path, is that the emptying of the slag collecting / lock container by supplying the fresh water adjusted the temperature and opened after reaching the desired temperature, an outlet valve and the water / slag mixture of an encapsulated Absetzpfanne od.
  • the encapsulated Absetzpfanne is equipped with facilities for discharging the sediment slag and with facilities for the withdrawal of vapors.
  • FIG. 1 which shows only the area of a syngas extraction plant, which deals with the disposal of slag, and which schematically represents all the investment elements, this container for the proposed slag bath is drawn, the slag bath itself with quench zone and collecting space for the slag 1a.
  • this gas bubble 5a is in operative contact with the liquid clearance in the separation vessel 5, wherein the gas pressure via the line 23 is adjustable so that there is an overpressure that when opening the lock 4 to a jerky short-term backflow of the liquid mixture from the separation vessel 5 passes through the valve 4 into the funnel region 3 of the slag bath 1, in order to solve any slag bridges wedged thereon.
  • Fig. 1 follows the separation vessel 5, a narrowed flow channel 7, which is then fed to a slag / lock collection chamber 8, at the end of an outlet valve 9 for discharging the accumulating there slag.
  • the flow channel 7 and the container 8 may be equipped with external cooling coils to significantly cool the flowing slag / water stream
  • a supply of cold water to this lock container 8 may be provided, which in the Fig. 1 20, wherein a cooling, circulating flow is adjustable.
  • a corresponding flow line is in Fig. 1 denoted by 21, which may be connected to the line 20 via a not shown here Slag / water treatment may be connected to form a ring flow.
  • the discharge valve 9 leads to an encapsulation designated 10 of a slag receiving pan 13, which is filled with slag discharge means, e.g. a Kratzter 13a, may be equipped, wherein the Schlakkeaustrag designated 12 is additionally acted upon by a spray device 11 with liquid to prevent the discharge of impurities to the environment.
  • slag discharge means e.g. a Kratzterer 13a
  • a vapor withdrawal 15 is provided, which opens into a drift eliminator 16, with 17 a delivery device, e.g. a water jet pump is indicated, which can be operated simultaneously with a further spray 18, to spray the incoming slag, which then settles in the pan, which is designated 14.
  • the exhaust air outlet from the demister 16 is designated 19.
  • the water jet pump 17 and the spray device 18 require a high water flow, which is similar to the slag water flow from the container 8 during emptying through the valve 9, eg 12 m 3 in two minutes, ie 0.1 m 3 / s ,
  • water from a pressure reservoir 27 for the water jet pump 17 and the spray device 18 and optionally also used for the flushing 20 during the filling process of the container 8 with slag.
  • the overpressure is generated with a pressure pad. Preference is given to a higher pressure than that of the water bath, so that the water first for the rinse 20 under high pressure and can then be used for the water jet pump 17 and the spray device 18 during the emptying of the container. Also for the filling of the empty container 8 in the pressureless state, a similarly high water flow is required. This water requirement can be covered by an inexpensive, non-pressurized reservoir, which can be housed above the container 8 (not shown) in order to be able to transfer the water only with the help of the hydrostatic pressure. Both containers are supplied with water with a relatively small flow of water during the entire cycle, for example one hour. The reservoirs also allow the use of continuously accumulated or treated and cooled process water.
  • Fig. 1 nor the device for forming a slag flow supporting ring flow with extract of the liquid from the separation vessel 5 via a circulation pump 22 in the slag bath container 1 below the liquid level.
  • a line for the return of displaced water is indicated, with 25 a possible derivation of the displaced water depending on the feed of fresh water, for example via the line 20, wherein 26 is indicated an exhaust duct.
  • Fig. 2 a slightly modified embodiment of the system is reproduced, wherein the elements are the same effective wear the same reference numerals as in Fig. 1
  • the separation vessel 5 with internals 6 and the slag / lock collection chamber 8 is formed as a component and in Fig. 2 denoted by 5, 8. This is particularly useful when the slag bath can be operated at relatively low temperatures, so that intensive flushing about a cooling path 7 is unnecessary.
  • Fig. 2 are still some additional parts of the system shown, such as a fresh water reservoir 27, which is equipped with a gas buffer 28, as well as a slag / water treatment plant, generally designated 29, which can be fed from the individual parts of the system slag / water, this optionally via a line 30 as filtrate the slag bath container 1 can be fed again.
  • a fresh water reservoir 27 which is equipped with a gas buffer 28, as well as a slag / water treatment plant, generally designated 29, which can be fed from the individual parts of the system slag / water, this optionally via a line 30 as filtrate the slag bath container 1 can be fed again.
  • the described embodiments of the invention are still to be modified in many ways, without departing from the spirit.
  • the invention is not limited in particular to a particular shape of the individual components, not even in the manner of a slag breaker 2, the particular way of cooling the cooling section 7 and the treatment of the slag water, to name just a few examples.
  • only one lock is provided, e.g. for comparably low slag throughput (e.g., 10 t / h).
  • slag throughput e.g., 40 t / h
  • two parallel locks with all components i. be provided from the valve 4 to the valve 9 in duplicate.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)
  • Processing Of Solid Wastes (AREA)
  • Industrial Gases (AREA)
  • Treating Waste Gases (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Gasification And Melting Of Waste (AREA)

Description

Die Erfindung richtet sich auf ein Verfahren zur Entfernung insbesondere bei der Synthesegas-Gewinnung anfallenden Schlacken aus einem in einem Druckbehälter befindlichen Schlackebad in einen Sammelbehälter für die Schlacke, in Schwerkraftrichtung unterhalb des Schlackebades, wobei unterhalb des Schlackebades ggf. eine Einrichtung zum Brechen der Schlacke und zwischen den Behältern ein Schleusenventil vorgesehen ist, sowie auf eine Anlage zur Durchführung dieses Verfahrens.The invention is directed to a method for removing in particular in the syngas recovery obtained slags from a slag bath located in a pressure vessel in a sump for the slag, in the direction of gravity below the slag bath, below the slag if necessary, a device for breaking the slag and a lock valve is provided between the containers, as well as a system for carrying out this method.

Insbesondere bei der Herstellung von Synthesegas fällt bei der teilweisen Verbrennung von kohlenstoffhaltigen Brennstoffen Schlacke an, die in einem Wasserreservoir abgeschreckt und abgekühlt wird. Dabei ist es auch bekannt, zu große Schlacketeile in diesem Abschreckbad mittels entsprechender Einrichtungen zu zerkleinern. Zum Stand der Technik seien hier insbesondere die DE 26 06 039-A1 , die DE 28 29 629 C2 , die DE 31 44 266-A1 , die DE 600 31 875 T2 , die EP 0 290 087 A2 , die EP 0 113 469 B1 oder die US 4 852 997 genannt.In particular, in the production of synthesis gas falls in the partial combustion of carbonaceous fuels slag, which is quenched in a water reservoir and cooled. It is also known to crush too large slag in this quench by means of appropriate facilities. The state of the art is here in particular the DE 26 06 039-A1 , the DE 28 29 629 C2 , the DE 31 44 266-A1 , the DE 600 31 875 T2 , the EP 0 290 087 A2 , the EP 0 113 469 B1 or the U.S. 4,852,997 called.

Um das Austragen der Schlacke bzw. das Durchströmen der entsprechenden Schleusenbereiche zu verbessern, ist es bekannt, aus einem im System stromabwärts liegenden, in der Regel in Schwerkraftrichtung unter den anderen Behältern angeordneten Sammelbehälter feststoffarmes Wasser in den darüber befindlichen Behälter zu pumpen, um so die Strömung durch die Engpässe bzw. ein Ventil bei dessen Öffnung zu verbessern. Diese Strömungsausbildung zwischen dem stromabwärtigen Behälter und dem stromaufwärts liegenden Behälter kann z.B. durch Pumpen erfolgen, wie dies in der DE-600 31 875-T2 gezeigt ist oder in der DE-31 44 266-A1 beschrieben ist. Sie kann aber auch durch eine Unterdruckgasblase im Kopfbereich des stromabwärtigen Behälters bewirkt werden, wie dies in der EP-0 290 087-A2 beschrieben ist, die mit der Gasblase im Unterdruck den Wasser-/Schlackestrom durch die Ventilbereiche unter Erhöhung der Strömungsgeschwindigkeit durchsaugt.In order to improve the discharge of the slag or the passage of the respective lock areas, it is known to pump from a downstream in the system, usually arranged in the direction of gravity among the other containers collecting solid water in the container above it, so as to Flow through the bottlenecks or a valve to improve its opening. This flow formation between the downstream container and the upstream container can be done for example by pumping, as in the DE-600 31 875-T2 is shown or in the DE-31 44 266-A1 is described. But it can also be effected by a vacuum gas bubble in the head region of the downstream container, as shown in the EP-0 290 087-A2 is described, which sucks with the gas bubble in the negative pressure, the water / slag flow through the valve areas while increasing the flow rate.

Neben dem Problem des Festsetzens von Schlacke in Einschnürungen bzw. im Ventilbereich, besteht ein anderes Problem darin, dass umweltbelastende Brüden das System verlassen können.Besides the problem of setting slag in constrictions or in the valve area, another problem is that polluting vapors can leave the system.

Hier setzt die Erfindung an, deren Aufgabe darin besteht, die entsprechenden Verfahrensweisen und Anlagen der in Rede stehende Gattungen deutlich zu verbessern, bei Verbesserung des Schlackeabzuges und bei Vermeidung von umweltbelastenden Brüden oder Abgasen.This is where the invention, whose task is to significantly improve the relevant procedures and facilities of the genera in question, in improving the slag and avoiding polluting vapors or exhaust gases.

Mit einem Verfahren der eingangs bezeichneten Art wird diese Aufgabe gemäß der Erfindung nach Anspruch 1 gelöst.With a method of the type described, this object is achieved according to the invention of claim 1.

Es hat sich gezeigt, dass durch einen kurzen, z.B. einige Sekunden dauernden, intensiven Gas- bzw. Wassergegenstrom durch das obere Schleusenventil evtl. auftretende Brücken aus zusammengepressten, verkeilten Schlacken oder Großpartikel sich lösen lassen, um für einen optimalen Durchfluss zu sorgen.It has been shown that by a short, for example a few seconds, intensive gas or water counterflow through the upper gate valve possibly occurring bridges of compressed, wedged slags or large particles dissolve to provide optimal flow.

Weitere Verbesserungen der Durchströmung ergeben sich z.B. dadurch, dass dem Schlacke-Schleusen/Sammelbehälter Einbauten zugeordnet sind, mit denen die Schlacke-/Wasserströmung verändert wird.Further improvements of the flow occur e.g. in that the slag locks / collecting tanks are assigned installations with which the slag / water flow is changed.

Je nach Verfahrensbedingungen ist es möglich, dass bereits im ersten, das Granulat der Schlacke bildenden Behälter Temperaturen im Sättigungsbereich z.B. bei 200°C liegen, die am Ende des Systemes bei geringer Kühlung zu einer erheblichen Brüdenbildung führen, die es, wie oben schon angegeben, zu vermeiden gilt.Depending on the process conditions, it is possible for temperatures in the saturation region, for example, already in the first container forming the granules of the slag to be determined, for example. at 200 ° C, which lead at the end of the system with low cooling to a significant vapor formation, which, as stated above, must be avoided.

Hier sieht die Erfindung in Ausgestaltung vor, dass der Einschnürung folgend ein verengter Strömungskanal, in dem der Schlacke-/Wasserstrom gekühlt wird, vorgesehen ist und/oder dass im Schlacke-Sammel-/Schleusenbehälter durch Zuspeisung von kälterem Wasser ein Gegenstrom gegen den Schlackestrom erzeugt wird. Vorteilhaft ist eine tangentiale oder sekantiale Einspeisung des Wassers, um Drall zu erzeugen und die Kühlung zu verbessern.Here, the invention provides in an embodiment that the constriction following a narrowed flow channel in which the slag / water flow is cooled, is provided and / or that generates a countercurrent to the slag stream in the slag collecting / lock container by feeding colder water becomes. Advantageously, a tangential or secant feed of the water to create swirl and to improve the cooling.

Eine besonders günstige Verfahrensweise, insbesondere am Ende des Schlacke-Behandlungsweges, besteht darin, dass zum Entleeren des Schlacke-Sammel/Schleusenbehälters durch Zufuhr des Frischwassers die Temperatur eingestellt und nach Erreichen der gewünschten Temperatur ein Auslassventil geöffnet und das Wasser-/Schlackegemisch einer gekapselten Absetzpfanne od. dgl. zugeführt wird, wobei die gekapselte Absetzpfanne mit Einrichtungen zum Austragen der abgesetzten Schlacke sowie mit Einrichtungen zum Abzug von Brüden ausgerüstet ist.A particularly favorable procedure, in particular at the end of the slag treatment path, is that the emptying of the slag collecting / lock container by supplying the fresh water adjusted the temperature and opened after reaching the desired temperature, an outlet valve and the water / slag mixture of an encapsulated Absetzpfanne od. Like. Is supplied, the encapsulated Absetzpfanne is equipped with facilities for discharging the sediment slag and with facilities for the withdrawal of vapors.

Die oben gestellte Aufgabe wird gemäß Anspruch 6 gelöst.The above object is achieved according to claim 6.

Weitere Ausgestaltungen der erfindungsgemäßen Anlage ergeben sich aus den weiteren, die Anlage betreffenden Unteransprüchen.Further embodiments of the system according to the invention will become apparent from the other, the appended sub-claims.

Die Erfindung ist nachstehend anhand der Zeichnung beispielsweise näher erläutert. Diese zeigt in den

Fig. 1 und 2
je ein vereinfachtes Anlageschaubild zweier Ausgestaltungen der Erfindung.
The invention is explained in more detail below with reference to the drawing, for example. This shows in the
Fig. 1 and 2
each a simplified diagram of two embodiments of the invention.

Bezugnehmend auf Fig. 1, die lediglich den Bereich einer Synthesegasgewinnungsanlage zeigt, die sich mit der Entsorgung der Schlacke befasst, und die alle Anlageelemente schematisch wiedergibt, ist dieser Behälter für das vorgesehene Schlackebad mit eingezeichnet, das Schlackebad selbst mit Abschreckzone und Sammelraum für die Schlacke 1a.Referring to Fig. 1 , which shows only the area of a syngas extraction plant, which deals with the disposal of slag, and which schematically represents all the investment elements, this container for the proposed slag bath is drawn, the slag bath itself with quench zone and collecting space for the slag 1a.

Lediglich symbolhaft sind mit 2 Schlackebrecher wiedergegeben, die sich in einem vergüngenden Raum des Schlackebad-Behälters 1 befinden können. Unterhalb dieser Schlackebrecher führt eine Einschnürung 3 zu einem mit 4 bezeichneten Schleusenventil, das in ein rohrförmiges Element führt, das wiederum bei Öffnung des Ventiles 4 den Schlacke-/Wasserstrom in einen mit 5 bezeichneten Trennbehälter leitet, der mit einer Einschnürung 6 ausgestattet ist, um die Schlacketrennung zu erleichtern.Only symbolically reproduced with 2 slag crushers, which can be located in a pleasant space of the slag bath container 1. Below this slag breaker leads a constriction 3 to a designated 4 Sluice valve which leads into a tubular element which in turn, when opening the valve 4, directs the slag / water stream into a separation vessel designated 5, which is provided with a constriction 6 to facilitate slag separation.

Wie dargestellt, ergibt sich in diesem Trennbehälter 5 im Kopfbereich ein mit einer Gasblase 5a gefüllter Ringraum, dessen Volumen maximal 20 % des Schleusenvolumens betragen kann. Die Gaszufuhrleitung in diesen Ringraum ist mit 23 bezeichnet.As shown, results in this separation vessel 5 in the head area filled with a gas bubble 5 a ring space whose volume can amount to a maximum of 20% of the lock volume. The gas supply line in this annulus is designated 23.

Wie ersichtlich, ist diese Gasblase 5a in Wirkkontakt mit dem Flüssigkeitsspiel im Trennbehälter 5, wobei der Gasdruck über die Leitung 23 so einstellbar ist, dass ein solcher Überdruck herrscht, dass es bei Öffnung der Schleuse 4 zu einer stoßartigen kurzfristigen Rückströmung des Flüssigkeitsgemisches aus dem Trennbehälter 5 durch das Ventil 4 hindurch in den Trichterbereich 3 des Schlackebades 1 kommt, um dort ggf. verkeilte Schlacke-Brücken zu lösen.As can be seen, this gas bubble 5a is in operative contact with the liquid clearance in the separation vessel 5, wherein the gas pressure via the line 23 is adjustable so that there is an overpressure that when opening the lock 4 to a jerky short-term backflow of the liquid mixture from the separation vessel 5 passes through the valve 4 into the funnel region 3 of the slag bath 1, in order to solve any slag bridges wedged thereon.

Im Beispiel der Fig. 1 folgt dem Trennbehälter 5 ein verengter Strömungskanal 7, der dann einem Schlacke-/Schleusensammelraum 8 zugeführt wird, an dessen Ende ein Auslassventil 9 zur Ausschleusung der sich dort ansammelnden Schlacke befindet. Der Strömungskanal 7 und der Behälter 8 können mit äußeren Kühlschlangen ausgestattet sein, um den durchströmenden Schlacke-/Wasserstrom deutlich zu kühlenIn the example of Fig. 1 follows the separation vessel 5, a narrowed flow channel 7, which is then fed to a slag / lock collection chamber 8, at the end of an outlet valve 9 for discharging the accumulating there slag. The flow channel 7 and the container 8 may be equipped with external cooling coils to significantly cool the flowing slag / water stream

Zur weiteren Kühlung kann, wenn nötig, eine Einspeisung von Kaltwasser zu diesem Schleusenbehälter 8 vorgesehen sein, was in der Fig. 1 mit 20 bezeichnet ist, wobei eine kühlende, umlaufende Strömung einstellbar ist. Eine entsprechende Strömungsleitung ist in Fig. 1 mit 21 bezeichnet, die mit der Leitung 20 ggf. über eine hier nicht näher dargestellte Schlacke-/Wasserbehandlung zur Bildung einer Ringströmung verbunden sein kann.For further cooling, if necessary, a supply of cold water to this lock container 8 may be provided, which in the Fig. 1 20, wherein a cooling, circulating flow is adjustable. A corresponding flow line is in Fig. 1 denoted by 21, which may be connected to the line 20 via a not shown here Slag / water treatment may be connected to form a ring flow.

Das Ausschleusungsventil 9 führt in eine mit 10 bezeichnete Kapselung einer Schlacke-Aufnahmepfanne 13, die mit einer Schlacke-Austragseinrichtung, z.B. einem Kratzförderer 13a, ausgerüstet sein kann, wobei der mit 12 bezeichnete Schlakkeaustrag zusätzlich noch über eine Sprühvorrichtung 11 mit Flüssigkeit beaufschlagbar ist, um die Austragung von Verunreinigungen an die Umgebung zu verhindern.The discharge valve 9 leads to an encapsulation designated 10 of a slag receiving pan 13, which is filled with slag discharge means, e.g. a Kratzförderer 13a, may be equipped, wherein the Schlakkeaustrag designated 12 is additionally acted upon by a spray device 11 with liquid to prevent the discharge of impurities to the environment.

Um die gekühlten Brüden aus der Kapselung 10 austragen zu können, ist ein Brüdenabzug 15 vorgesehen, der in einen Tropfenabscheider 16 mündet, wobei mit 17 eine Fördereinrichtung, z.B. eine Wasserstrahlpumpe, angedeutet ist, die gleichzeitig auch mit einer weiteren Sprüheinrichtung 18 betrieben werden kann, um die einfallende Schlacke zu besprühen, die sich dann in der Pfanne absetzt, was mit 14 bezeichnet ist. Der Abluftausgang aus dem Tropfenabscheider 16 ist mit 19 bezeichnet.In order to be able to discharge the cooled vapors from the encapsulation 10, a vapor withdrawal 15 is provided, which opens into a drift eliminator 16, with 17 a delivery device, e.g. a water jet pump is indicated, which can be operated simultaneously with a further spray 18, to spray the incoming slag, which then settles in the pan, which is designated 14. The exhaust air outlet from the demister 16 is designated 19.

Die Wasserstrahlpumpe 17 und die Sprühvorrichtung 18 benötigen einen hohen Wasserstrom, der ähnlich groß ist, wie der Schlacke-Wasserstrom aus dem Behälter 8 während der Entleerung durch das Ventil 9, z.B. 12 m3 in zwei Minuten, d.h. 0,1 m3/s. Um eine großdimensionierte Wasserversorgung (Wasserleitung, Pumpe u.a.) zu vermeiden, wird Wasser aus einem Druck-Vorratsbehälter 27 (in Fig. 2 angedeutet) für die Wasserstrahlpumpe 17 und die Spritzvorrichtung 18 und optional auch für die Spülung 20 während des Füllvorganges des Behälters 8 mit Schlacke verwendet.The water jet pump 17 and the spray device 18 require a high water flow, which is similar to the slag water flow from the container 8 during emptying through the valve 9, eg 12 m 3 in two minutes, ie 0.1 m 3 / s , In order to avoid a large-scale water supply (water pipe, pump, etc.), water from a pressure reservoir 27 (in Fig. 2 indicated) for the water jet pump 17 and the spray device 18 and optionally also used for the flushing 20 during the filling process of the container 8 with slag.

Der Überdruck wird mit einem Druckpolster erzeugt. Bevorzugt wird ein höherer Druck als der des Wasserbades, damit das Wasser zuerst für die Spülung 20 unter hohem Druck und dann für die Wasserstrahlpumpe 17 und die Sprühvorrichtung 18 während der Entleerung des Behälters verwendet werden kann. Auch für das Füllen des leeren Behälters 8 im drucklosen Zustand ist ein ähnlich hoher Wasserstrom erforderlich. Dieser Wasserbedarf kann durch einen preiswerten, drucklosen Vorratsbehälter gedeckt werden, der oberhalb des Behälters 8 untergebracht sein kann (nicht dargestellt), um das Wasser nur mit Hilfe des hydrostatischen Druckes umfüllen zu können. Beide Behälter werden mit einem relativ kleinen Wasserstrom während des gesamten Zyklusses, z.B. eine Stunde, mit Wasser versorgt. Die Vorratsbehälter ermöglichen auch die Verwendung von kontinuierlich anfallendem bzw. behandeltem und gekühlten Prozesswasser.The overpressure is generated with a pressure pad. Preference is given to a higher pressure than that of the water bath, so that the water first for the rinse 20 under high pressure and can then be used for the water jet pump 17 and the spray device 18 during the emptying of the container. Also for the filling of the empty container 8 in the pressureless state, a similarly high water flow is required. This water requirement can be covered by an inexpensive, non-pressurized reservoir, which can be housed above the container 8 (not shown) in order to be able to transfer the water only with the help of the hydrostatic pressure. Both containers are supplied with water with a relatively small flow of water during the entire cycle, for example one hour. The reservoirs also allow the use of continuously accumulated or treated and cooled process water.

Zusätzlich zeigt Fig. 1 noch die Einrichtung zur Bildung einer den Schlacke-Fluss unterstützenden Ringströmung mit Auszug der Flüssigkeit aus dem Trennbehälter 5 über eine Umwälzpumpe 22 in den Schlackebad-Behälter 1 unterhalb des Flüssigkeitsniveaus. Mit 24 ist eine Leitung zur Rückführung von verdrängtem Wasser angedeutet, mit 25 eine evtl. Ableitung des verdrängten Wassers je nach Zuspeisung von Frischwasser, z.B. über die Leitung 20, wobei mit 26 noch eine Abluftleitung angedeutet ist.Additionally shows Fig. 1 nor the device for forming a slag flow supporting ring flow with extract of the liquid from the separation vessel 5 via a circulation pump 22 in the slag bath container 1 below the liquid level. With 24 a line for the return of displaced water is indicated, with 25 a possible derivation of the displaced water depending on the feed of fresh water, for example via the line 20, wherein 26 is indicated an exhaust duct.

In Fig. 2 ist ein geringfügig abgewandeltes Ausführungsbeispiel der Anlage wiedergegeben, wobei die wirkmäßig gleichen Elemente die gleichen Bezugszeichen tragen wie in Fig. 1, dort ist allerdings der Trennbehälter 5 mit Einbauten 6 sowie der Schlacke-/Schleusensammelraum 8 als ein Bauteil ausgebildet und in Fig. 2 mit 5, 8 bezeichnet. Dies bietet sich insbesondere dann an, wenn das Schlackebad bei relativ niedrigen Temperaturen betrieben werden kann, so dass eine intensive Wegspülung etwa über eine Kühlstrecke 7 entbehrlich ist.In Fig. 2 a slightly modified embodiment of the system is reproduced, wherein the elements are the same effective wear the same reference numerals as in Fig. 1 However, there is the separation vessel 5 with internals 6 and the slag / lock collection chamber 8 is formed as a component and in Fig. 2 denoted by 5, 8. This is particularly useful when the slag bath can be operated at relatively low temperatures, so that intensive flushing about a cooling path 7 is unnecessary.

In Fig. 2 sind noch einige zusätzliche Anlagenteile mit eingezeichnet, so beispielsweise ein Frischwasservorratsbehälter 27, der mit einem Gaspuffer 28 ausgerüstet ist, ebenso wie eine Schlacke-/Wasser-Behandlungsanlage, allgemein mit 29 bezeichnet, der aus den einzelnen Systemteilen Schlacke/Wasser zugeführt werden kann, diese ggf. über eine Leitung 30 als Filtrat dem Schlackebad-Behälter 1 wieder zugeführt werden kann.In Fig. 2 are still some additional parts of the system shown, such as a fresh water reservoir 27, which is equipped with a gas buffer 28, as well as a slag / water treatment plant, generally designated 29, which can be fed from the individual parts of the system slag / water, this optionally via a line 30 as filtrate the slag bath container 1 can be fed again.

Natürlich sind die beschriebenen Ausführungsbeispiele der Erfindung noch in vielfacher Hinsicht abzuändern, ohne den Grundgedanken zu verlassen. So ist die Erfindung insbesondere nicht auf eine bestimmte Form der einzelnen Bauteile beschränkt, auch nicht auf die Art eines Schlackebrechers 2, die besondere Art der Kühlung der Kühlstrecke 7 sowie der Aufbereitung des Schlackewassers, um nur einige Beispiele zu nennen. Im in den Figuren beschriebenen Beispiel ist nur eine Schleuse vorgesehen, z.B. für vergleichbar geringen Schlackedurchsatz (z.B. 10 t/h). Bei höherem Schlackedurchsatz (z.B. 40 t/h) können z.B. zwei parallele Schleusen mit allen Komponenten, d.h. vom Ventil 4 bis zum Ventil 9 in doppelter Ausführung vorgesehen sein.Of course, the described embodiments of the invention are still to be modified in many ways, without departing from the spirit. Thus, the invention is not limited in particular to a particular shape of the individual components, not even in the manner of a slag breaker 2, the particular way of cooling the cooling section 7 and the treatment of the slag water, to name just a few examples. In the example described in the figures, only one lock is provided, e.g. for comparably low slag throughput (e.g., 10 t / h). At higher slag throughput (e.g., 40 t / h), e.g. two parallel locks with all components, i. be provided from the valve 4 to the valve 9 in duplicate.

Claims (11)

  1. Method for removing slag, particularly slag produced during synthesis gas recovery, from a slag bath located in a pressurised container, into a collecting container for the slag, below the slag bath in the direction of gravity, wherein, if desired, a device for breaking up the slag is provided below the slag bath and a sluice valve is provided between the containers,
    characterised in that
    a space filled with a gas bubble and in contact with the liquid in the containers, particularly an annular space or a separate container, is provided, in which the pressure of the gas bubble is regulated by the supply of gas, such that, when the slag bath valve is opened, at least some of the water situated in the slag sluice/collection space flows through said valve, in the direction of the slag bath, counter to the direction of gravity, the slag sluice/collection container having associated installations by means of which the flow of slag/water is changed.
  2. Method according to claim 1,
    characterised in that
    a constricted flow channel in which the flow of slag/water is cooled is provided downstream of the installations.
  3. Method according to claim 1 or 2,
    characterised in that
    a countercurrent opposing the flow of slag is produced in the slag collection/sluice container, by feeding in colder water.
  4. Method according to one of the preceding claims,
    characterised in that,
    during the filling and before the emptying of the slag collection/sluice container, the temperature is adjusted by supplying fresh water and after the desired temperature has been reached an outlet valve is opened and the mixture of water and slag is supplied to an encapsulated settling pan or the like, the encapsulated settling pan being equipped with devices for discharging the settled slag and with devices for drawing off vapours.
  5. Apparatus for carrying out a method for removing slag, particularly slag produced during synthesis gas recovery, from a slag bath (1) located in a pressurised container, into a collecting container (8) for the slag, below the slag bath in the direction of gravity, wherein, if desired, a device (2) for breaking up the slag is provided below the slag bath (1) and a sluice valve (4) is provided between the containers,
    characterised in that
    underneath the sluice valve (4) is provided a receiving space (5a) for a gas bubble, the pressure of which can be controlled by means of a filling valve and which is operatively connected to the liquid in the collecting container (5, 8), while flow-accelerating installations (6) are provided in the slag collection/sluice container (5, 8).
  6. Apparatus according to claim 5,
    characterised in that
    the flow-accelerating installations (6) are followed by a constricted flow channel (7) in which the slag is cooled by means of water in a countercurrent.
  7. Apparatus according to claim 6,
    characterised in that
    the constricted flow channel (7) and/or the subsequent container (8) is/are equipped with cooling devices, for example cooling coils, for cooling the flow of water/slag.
  8. Apparatus according to claim 5 or one of the subsequent claims,
    characterised by
    a slag receiving pan (13) that is provided with a gas-tight encapsulation (10).
  9. Apparatus according to claim 8,
    characterised in that
    the encapsulated slag receiving pan (13) is equipped with discharge means (13a) for the cooled slag and/or with a vapour exhaust device (17) having a droplet precipitator (16).
  10. Apparatus according to claim 5 or one of the subsequent claims,
    characterised by
    at least one fresh water container (27) having a gas buffer (28), for filling the container (8) with water after it has been emptied and/or for pressurised water flushing and/or for spraying the slag with additional water during the emptying of the container (8).
  11. Apparatus according to claim 5 or one of the subsequent claims,
    characterised in that
    the sluice container (8) is provided with a cold-water or fresh-water feed (20), which is directed tangentially, such that a rotating flow forms in the container (8) when the fresh water is fed in.
EP09704328.5A 2008-01-24 2009-01-21 Method and plant for removing slag accruing in particular during synthesis gas recovery from a slag bath container Active EP2234709B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09704328T PL2234709T3 (en) 2008-01-24 2009-01-21 Method and plant for removing slag accruing in particular during synthesis gas recovery from a slag bath container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008005704A DE102008005704A1 (en) 2008-01-24 2008-01-24 Process and installation for the removal of slag from a slag bath tank, in particular in synthesis gas recovery
PCT/EP2009/000350 WO2009092569A2 (en) 2008-01-24 2009-01-21 Method and plant for removing slag accruing in particular during synthesis gas recovery from a slag bath container

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EP2234709A2 EP2234709A2 (en) 2010-10-06
EP2234709B1 true EP2234709B1 (en) 2014-10-22

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US (1) US8414780B2 (en)
EP (1) EP2234709B1 (en)
CN (1) CN101918125B (en)
AU (1) AU2009207850A1 (en)
BR (1) BRPI0906524A2 (en)
CA (1) CA2712623C (en)
DE (1) DE102008005704A1 (en)
ES (1) ES2528387T3 (en)
HK (1) HK1150159A1 (en)
PL (1) PL2234709T3 (en)
RU (1) RU2010134924A (en)
TW (1) TW200940699A (en)
UA (1) UA98526C2 (en)
WO (1) WO2009092569A2 (en)
ZA (1) ZA201005983B (en)

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DE102008033095A1 (en) * 2008-07-15 2010-01-28 Uhde Gmbh Apparatus for slag removal from a coal gasification reactor
DE102008035386A1 (en) 2008-07-29 2010-02-11 Uhde Gmbh Slag discharge from reactor for syngas recovery
CN102732325A (en) * 2012-07-06 2012-10-17 东南大学 High-pressure and high-temperature furnace slag wind and water cooling and deslagging device
JP6719971B2 (en) * 2016-05-16 2020-07-08 三菱日立パワーシステムズ株式会社 Slag discharge system, gasification furnace, and slag filtration method
CN113322101A (en) * 2021-06-30 2021-08-31 昆明理工大学 Phosphorus coal gasification reaction device for combined production of yellow phosphorus and synthesis gas
CN113336207A (en) * 2021-06-30 2021-09-03 昆明理工大学 Combined production system of yellow phosphorus and synthesis gas

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PL2234709T3 (en) 2015-07-31
CA2712623C (en) 2016-03-08
HK1150159A1 (en) 2011-11-04
WO2009092569A4 (en) 2010-03-18
AU2009207850A1 (en) 2009-07-30
CN101918125B (en) 2013-10-02
ZA201005983B (en) 2011-05-25
US8414780B2 (en) 2013-04-09
WO2009092569A2 (en) 2009-07-30
CN101918125A (en) 2010-12-15
DE102008005704A1 (en) 2009-07-30
BRPI0906524A2 (en) 2015-07-21
WO2009092569A3 (en) 2010-01-28
TW200940699A (en) 2009-10-01
EP2234709A2 (en) 2010-10-06
CA2712623A1 (en) 2009-07-30
RU2010134924A (en) 2012-04-20
UA98526C2 (en) 2012-05-25
US20100288711A1 (en) 2010-11-18
ES2528387T3 (en) 2015-02-09

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