EP2234709A2 - 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

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Publication number
EP2234709A2
EP2234709A2 EP09704328A EP09704328A EP2234709A2 EP 2234709 A2 EP2234709 A2 EP 2234709A2 EP 09704328 A EP09704328 A EP 09704328A EP 09704328 A EP09704328 A EP 09704328A EP 2234709 A2 EP2234709 A2 EP 2234709A2
Authority
EP
European Patent Office
Prior art keywords
slag
water
container
bath
valve
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.)
Granted
Application number
EP09704328A
Other languages
German (de)
French (fr)
Other versions
EP2234709B1 (en
Inventor
Johannes Kowoll
Eberhard Kuske
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Uhde GmbH
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Filing date
Publication date
Application filed by Uhde GmbH filed Critical Uhde GmbH
Priority to PL09704328T priority Critical patent/PL2234709T3/en
Publication of EP2234709A2 publication Critical patent/EP2234709A2/en
Application granted granted Critical
Publication of EP2234709B1 publication Critical patent/EP2234709B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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.
  • this object is achieved according to the invention in that a standing in contact with the liquid in the containers, filled with a gas bubble space, in particular an annulus or a separate container, is provided in which the pressure of Gas bubble is controlled by gas supply such that at least a portion of the water in the slag locks / plenum when opening the upper slag bath lock valve flows through this in the direction of the slag bath against the direction of gravity.
  • the granules of the slag forming container temperatures in the saturation region for example at 200 0 C, which lead at the end of the system with low cooling to a significant vapor formation, which, as stated above, to avoid.
  • the invention provides in an embodiment that following the constriction a narrowed flow channel, in which the slag / water stream 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. Like. is supplied, wherein the encapsulated Absetzpfanne equipped with means for discharging the settled slag and with facilities for the withdrawal of vapors.
  • 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 such 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.
  • the separating tank 5 is followed by a narrowed flow channel 7, which is then fed to a slag / sluice collecting space 8, at the end of which an outlet valve 9 for discharging the slag accumulating there is located.
  • 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 is designated in Fig. 1 with 20, wherein a cooling, circulating flow is adjustable.
  • a corresponding flow line is designated in Fig. 1 with 21, which may be connected to the line 20 via a not shown here Slag / water treatment may be connected to form a Ringströrnung.
  • 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 scraper conveyor 13a, may be equipped, wherein the Schlakkeaustrag called 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 scraper conveyor 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 for the flushing 20 during the filling of the container 8 with Slag used.
  • 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 also shows the means 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, e.g. via the line 20, wherein with 26 an exhaust duct is indicated.
  • FIG. 2 a slightly modified embodiment of the system is shown, wherein the elements are the same effective wear the same reference numerals as in Fig. 1, but there is the separation vessel 5 with internals 6 and the slag / lock collection chamber 8 formed as a component and in Fig. 2 denoted by 5, 8.
  • FIG. 2 also shows a few additional parts of the installation, for example a fresh water storage tank 27, which is equipped with a gas buffer 28, as well as a slag / water treatment plant, generally designated 29, which contains slag from the individual system parts. Water can be supplied, this if necessary 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 specific 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)
  • Industrial Gases (AREA)
  • Treating Waste Gases (AREA)
  • Processing Of Solid Wastes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

A method for removing slag accruing in particular during synthesis gas recovery from slag present in a pressurized container bath in a collecting tank for the slag, in the direction of gravity under the slag bath, wherein optionally a mechanism for breaking the slag is provided under the slag bath and a sluice valve is provided between the containers, is to clearly improve the corresponding processes and plants of the relevant kinds by improving withdrawal of slag and by preventing environmentally harmful exhaust vapors or waste gases. This is achieved in that a space that is in contact with the liquid in the containers and is filled with a gas bubble is provided, in particular an annular space or a separate container, in which the pressure of the gas bubble is controlled by gas supply such that at least part of the water present in the slag sluice/collection space flows through the slag bath valve against the direction of gravity in the direction of the slag bath when the slag bath valve is opened.

Description

"Verfahren und Anlage zur Entfernung insbesondere bei der Synthesegas-Gewinnung anfallenden Schlacken aus einem Schlackebad-Behälter""Process and plant for the removal of slag from a slag bath tank, especially in syngas recovery"
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-Al, die DE 28 29 629 C2 , die DE 31 44 266-Al1 die DE 600 31 875 T2 , die EP 0 290 087 A2 , die EP 0 113 469 Bl 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, in particular the DE may be mentioned here 26 06 039 Al, DE 28 29 629 C2, DE 31 44 266-Al 1, the DE 600 31 875 T2, EP 0290087 A2, EP 0113469 Bl or US 4,852,997.
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 strom- abwärtigen Behälter und dem stromaufwärts liegenden Behäl- ter kann z.B. durch Pumpen erfυlyeu, wie diea iϊi der DE- 600 31 875-T2 gezeigt ist oder in der DE-31 44 266-A1 beschrieben ist. Sie kann aber auch durch eine Unterdruckgas- blase im Kopfbereich des stromabwärtigen Behälters bewirkt werden, wie dies in der EP-O 290 087-A2 beschrieben ist, die mit der Gasblase im Unterdruck den Wasser-/Schlacke- strom 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 For example, it is possible to use a pump as described, for example, in DE-600 31 875-T2 or described in DE-31 44 266-A1. However, it can also be effected by a vacuum gas bubble in the head region of the downstream container, as described in EP-O 290 087-A2, which with the gas bubble in the negative pressure, the water / Schlacke- stream through the valve areas while increasing the Sucked through flow velocity.
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 species 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 dadurch gelöst, dass ein mit der Flüssigkeit in den Behältern in Kontakt stehender, mit einer Gasblase gefüllter Raum, insbesondere ein Ringraum oder ein separater Behälter, vorgesehen ist, in dem der Druck der Gasblase durch Gaszufuhr derart geregelt wird, dass wenigstens ein Teil des im Schlacke-Schleusen/Sammelraum befindlichen Wassers beim Öffnen des oberen Schlackebad-Schleusenventiles dieses in Richtung des Schlackebades gegen die Schwerkraftrichtung durchströmt.With a method of the type described, this object is achieved according to the invention in that a standing in contact with the liquid in the containers, filled with a gas bubble space, in particular an annulus or a separate container, is provided in which the pressure of Gas bubble is controlled by gas supply such that at least a portion of the water in the slag locks / plenum when opening the upper slag bath lock valve flows through this in the direction of the slag bath against the direction of gravity.
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 Großpar- tikel sich lösen lassen, um für einen optimalen. Durchfluss zu sorgen.It has been shown that a short, for example several seconds, intensive gas or water countercurrent through the upper gate valve possibly occurring bridges of compressed, entangled slag or large par- let it dissolve for optimal. Flow to ensure.
Weitere Verbesserungen der Durchströmung ergeben sich z.B. dadurch, dass dem Schlacke-Schleusen/Sammelbehälter Einbauten zugeordnet sind, mit denen die Schlacke-/Wasserströ- mung 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 2000C 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 that already in the first, the granules of the slag forming container temperatures in the saturation region, for example at 200 0 C, which lead at the end of the system with low cooling to a significant vapor formation, which, as stated above, to avoid.
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 following the constriction a narrowed flow channel, in which the slag / water stream 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 -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, wherein the encapsulated Absetzpfanne equipped with means for discharging the settled slag and with facilities for the withdrawal of vapors. - A -
Die oben gestellte Aufga.be wird mit einer Anlage gelöst, die aus einem Schlackebad-Behälter mit ggf. einer Einrichtung zum Brechen der anfallenden Schlacke besteht, dem in Schwerkraftrichtung unten eine Schleuse zugeordnet ist, die mit einem Schlacke-Sammel-/Schleusenbehälter in Verbindung steht und die sich dadurch auszeichnet, dass unterhalb des Eintrittsventiles der Schleuse ein Aufnahmeraum für eine Gasblase vorgesehen ist, deren Druck über ein Füllventil steuerbar ist und die mit der Flüssigkeit im Sammelbehälter in Wirkverbindung steht.The above-mentioned Aufga.be is solved with a system consisting of a slag bath container with possibly a device for breaking the resulting slag, which is assigned in the direction of gravity down a lock, which in combination with a slag collection / lock container stands and is characterized in that below the inlet valve of the lock a receiving space for a gas bubble is provided, the pressure of which is controllable via a filling valve and which is in operative connection with the liquid in the collecting container.
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 denThe invention is explained in more detail below with reference to the drawing, for example. This shows in the
Fig. 1 und 2 je ein vereinfachtes Anlageschaubild zweier Ausgestaltungen der Erfindung.1 and 2 each have 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 Ia.Referring to Figure 1, which shows only the area of a synthesis gas recovery plant involved in the disposal of the slag, and which schematically represents all the plant elements, this vessel is indicated for the intended slag bath, the slag bath itself with the quench zone and slag collecting space Ia.
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 Schleusεnvεntil, das in ein rohrförmiges ElerαenL 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 pleasing space of the slag bath container 1. Below this slag breaker leads a constriction 3 to a designated 4 Locking valve, which leads into a tubular ElerαenL, which in turn passes the slag / water flow in opening of the valve 4 in a designated 5 separating tank, which is equipped 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 such 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-/Schleu- sensammelraum 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, the separating tank 5 is followed by a narrowed flow channel 7, which is then fed to a slag / sluice collecting space 8, at the end of which an outlet valve 9 for discharging the slag accumulating there is located. 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 Ringströrnung verbunden sein kann.For further cooling, if necessary, a supply of cold water to this lock container 8 may be provided, which is designated in Fig. 1 with 20, wherein a cooling, circulating flow is adjustable. A corresponding flow line is designated in Fig. 1 with 21, which may be connected to the line 20 via a not shown here Slag / water treatment may be connected to form a Ringströrnung.
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 Schlak- keaustrag 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 scraper conveyor 13a, may be equipped, wherein the Schlakkeaustrag called 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 for the flushing 20 during the filling of the container 8 with Slag used.
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.In addition, Fig. 1 also shows the means 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, e.g. via the line 20, wherein with 26 an exhaust duct is indicated.
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 sind noch einige zusätzliche Anlagenteile mit eingezeichnet, so beispielsweise ein Frischwasservorrats- behälter 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, a slightly modified embodiment of the system is shown, wherein the elements are the same effective wear the same reference numerals as in Fig. 1, but there is the separation vessel 5 with internals 6 and the slag / lock collection chamber 8 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 also shows a few additional parts of the installation, for example a fresh water storage tank 27, which is equipped with a gas buffer 28, as well as a slag / water treatment plant, generally designated 29, which contains slag from the individual system parts. Water can be supplied, this if necessary 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 specific 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

Patentansprüche : Claims:
1. 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, dadurch gekennzeichnet, dass ein mit der Flüssigkeit in den Behältern in Kontakt stehender, mit einer Gasblase gefüllter Raum, insbesondere ein Ringraum oder ein separater Behälter, vorgesehen ist, in dem der Druck der Gasblase durch Gaszufuhr derart geregelt wird, dass wenigstens ein Teil des im Schlacke- Schleusen/Sammelraum befindlichen Wassers beim Öffnen des Schlackebadventiles dieses in Richtung des Schlackebades gegen die Schwerkraftrichtung durchströmt .1. A method for removing in particular in the syngas extraction 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 between the containers Sluice valve is provided, characterized in that a standing in contact with the liquid in the containers, filled with a gas bubble space, in particular an annulus or a separate container, is provided in which the pressure of the gas bubble is controlled by gas supply such that at least a part of the slag in the sluice / collecting space located water when opening the slag bath valve flows through this in the direction of the slag bath against the direction of gravity.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass dem Schlacke-Schleusen/Sammelbehälter Einbauten zugeordnet sind, mit denen die Schlacke-/Wasserströmung verändert wird.2. The method according to claim 1, characterized in that the slag-locks / sump baffles are assigned, with which the slag / water flow is changed.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass den Einbauten folgend ein verengter Strömungskanal vorgesehen ist, in dem der Schlacke-/Wasserstrom gekühlt wird.3. The method according to claim 1, characterized in that the internals following a narrowed flow channel is provided, in which the slag / water flow is cooled.
4. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass im Schlacke-Sammel-/Schleusenbehälter durch Zuspeisung von kälterem Wasser ein Gegenstrom gegen den Schlackestrom erzeugt wird.4. The method according to any one of the preceding claims, characterized that in the slag collecting / lock container by feeding colder water, a counter-current is generated against the slag stream.
5. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass während des Füllvorganges und vor dem 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.5. The method according to any one of the preceding claims, characterized in that set during the filling process and before emptying the slag collecting / lock container by supplying the fresh water, the temperature and 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 settled slag and with facilities for the withdrawal of vapors.
6. Anlage zur Durchführung eines Verfahrens zur Entfernung insbesondere bei der Synthesegas-Gewinnung anfallenden Schlacken aus einem in einem Druckbehälter befindliche Schlackebad (1) in einen Sammelbehälter (8) für die Schlak- ke, in Schwerkraftrichtung unterhalb des Schlackebades, wobei unterhalb des Schlackebades (1) ggf. eine Einrichtung (2) zum Brechen der Schlacke und zwischen den Behältern ein Schleusenventil (4) vorgesehen ist, dadurch gekennzeichnet, dass unterhalb des Schleusenventiles (4) ein Aufnahmeraum (5a) für eine Gasblase vorgesehen ist, deren Druck über ein Füllventil steuerbar ist und die mit der Flüssigkeit im Sammelbehälter (5,8) in Wirkverbindung steht.6. Plant for carrying out a method for removing in particular in the synthesis gas recovery obtained slags from a slag bath located in a pressure vessel (1) in a sump (8) for the Schlak- ke, in the direction of gravity below the slag bath, below the slag bath ( 1) optionally a device (2) for breaking the slag and between the containers a lock valve (4) is provided, characterized in that below the lock valve (4) a receiving space (5a) is provided for a gas bubble, the pressure over a Filling valve is controllable and is in operative connection with the liquid in the collecting container (5,8).
7. Anlage nach Anspruch 6 , gekennzeichnet durch7. Plant according to claim 6, characterized by
Strömungsbeschleunigende Einbauten (6) im Schlacke-Sammel-/ Schleusenbehälter (5,8). Flow-accelerating internals (6) in the slag collecting / lock container (5,8).
8. Anlage nach Anspruch 6 oder 7 , dadurch gekennzeichnet, dass den Strömungsbeschleunigenden Einbauten (6) ein verengter Strömungskanal (7) folgt, in dem die Schlacke durch Wasser im Gegenstrom gekühlt wird.8. Plant according to claim 6 or 7, characterized in that the Strömungsbeschleunigenden internals (6) a narrowed flow channel (7) follows, in which the slag is cooled by countercurrent water.
9. Anlage nach Anspruch 8 , dadurch gekennzeichnet, dass der verengte Strömungskanal (7) und/oder der nachfolgende Behälter (8) mit Kühleinrichtungen, z.B. Kühlschlangen, zur Kühlung des Wasser- /Schlackestromes ausgerüstet ist.Installation according to claim 8, characterized in that the restricted flow channel (7) and / or the subsequent container (8) are provided with cooling means, e.g. Cooling coils, is equipped for cooling the water / slag stream.
10. Anlage nach Anspruch 6 oder einem der folgenden, gekennzeichnet durch eine Schlacke-Aufnahmepfanne (13) , die mit einer gasdichten Kapselung (10) versehen ist.10. Plant according to claim 6 or one of the following, characterized by a slag receiving pan (13) which is provided with a gas-tight enclosure (10).
11. Anlage nach Anspruch 10, dadurch gekennzeichnet, dass die gekapselte Schlacke-Aufnahmepfanne (13) mit Aus- tragsmitteln (13a) für die gekühlte Schlacke und/oder mit einer Brüdenabzugseinrichtung (17) mit Tropfenabscheider (16) ausgerüstet ist.11. Plant according to claim 10, characterized in that the encapsulated slag receiving pan (13) is equipped with discharge means (13a) for the cooled slag and / or with a vapor withdrawal means (17) with a droplet separator (16).
12. Anlage nach Anspruch 6 oder einem der folgenden, gekennzeichnet durch wenigstens einen Frischwasserbehälter (27) mit Gaspuffer (28) zum Befüllen des Behälter (8) mit Wasser nach dessen Entleerung und/oder zum Druckwasserspülen und/oder zum Bespritzen der Schlacke beim Entleeren des Behälters (8) mit zusätzlichem Wassser.12. Plant according to claim 6 or one of the following, characterized by at least one fresh water tank (27) with gas buffer (28) for filling the container (8) with water after its emptying and / or for pressurized water flushing and / or for spraying the slag during emptying the container (8) with additional Wassser.
13. Anlage nach Anspruch 6 oder einem der folgenden, dadurch gekennzeichnet, dass der Schleusenbehälter (8) mit einer Kalt- bzw. Frisch- wassereinspeisung (20) versehen ist, die derart tangential ausgerichtet ist, dass sich bei Einspeisung des Frischwassers eine rotierende Strömung im Behälter (8) ausbildet. 13. Plant according to claim 6 or one of the following, characterized in that the lock container (8) is provided with a cold or fresh water feed (20), which is oriented tangentially in such a way that when the fresh water is fed, a rotating flow is formed in the container (8).
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)

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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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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

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WO2009092569A4 (en) 2010-03-18
RU2010134924A (en) 2012-04-20
CA2712623A1 (en) 2009-07-30
WO2009092569A2 (en) 2009-07-30
CN101918125B (en) 2013-10-02
EP2234709B1 (en) 2014-10-22
US20100288711A1 (en) 2010-11-18
HK1150159A1 (en) 2011-11-04
PL2234709T3 (en) 2015-07-31
UA98526C2 (en) 2012-05-25
AU2009207850A1 (en) 2009-07-30
TW200940699A (en) 2009-10-01
ES2528387T3 (en) 2015-02-09
BRPI0906524A2 (en) 2015-07-21
DE102008005704A1 (en) 2009-07-30

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