EP0009073A1 - Process for feeding coal into a coal gasification reactor - Google Patents

Process for feeding coal into a coal gasification reactor Download PDF

Info

Publication number
EP0009073A1
EP0009073A1 EP79102116A EP79102116A EP0009073A1 EP 0009073 A1 EP0009073 A1 EP 0009073A1 EP 79102116 A EP79102116 A EP 79102116A EP 79102116 A EP79102116 A EP 79102116A EP 0009073 A1 EP0009073 A1 EP 0009073A1
Authority
EP
European Patent Office
Prior art keywords
coal
gas
carbon dioxide
reactor
ammonia water
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
EP79102116A
Other languages
German (de)
French (fr)
Other versions
EP0009073B1 (en
Inventor
Jürgen Seipenbusch
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.)
Ruhrchemie AG
RAG AG
Original Assignee
Ruhrkohle AG
Ruhrchemie AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ruhrkohle AG, Ruhrchemie AG filed Critical Ruhrkohle AG
Publication of EP0009073A1 publication Critical patent/EP0009073A1/en
Application granted granted Critical
Publication of EP0009073B1 publication Critical patent/EP0009073B1/en
Expired legal-status Critical Current

Links

Images

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
    • C10J3/466—Entrained flow processes
    • 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
    • C10J3/526—Ash-removing devices for entrained flow gasifiers
    • 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
    • C10J3/72—Other features
    • C10J3/78—High-pressure apparatus
    • 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
    • C10J3/72—Other features
    • C10J3/82—Gas withdrawal means
    • C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
    • 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
    • C10J3/72—Other features
    • C10J3/86—Other features combined with waste-heat boilers
    • 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
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/093—Coal
    • 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
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0959—Oxygen
    • 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
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0973—Water
    • 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
    • C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
    • C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water
    • C10J2300/1815—Recycle loops, e.g. gas, solids, heating medium, water for carbon dioxide

Definitions

  • the invention relates to a method for introducing a hollow liquid suspension into a reactor of a coal gasification plant.
  • the reactor of a coal gasification plant is preferably operated with positive pressure.
  • Water is preferably used as the liquid, which at the same time is used to generate a gas containing CD and H 2 .
  • the object of the invention is therefore to improve the economy of coal gasification.
  • the invention is based on the idea of mineralizing the economy by changing the coal input.
  • the gas especially in fine distribution in the coal-liquid suspension, has a very advantageous effect on the conveying behavior by reducing the viscosity and, moreover, has a positive effect on the atomization of the suspension at the outlet from the burner into the reactor.
  • the gas is optionally blown through nozzles into the conveying passage of the coal-liquid suspension and / or mixed with a liquid gas carrier into the coal-liquid suspension.
  • gas can be added with a solid gas carrier.
  • the liquid gas evaporates in the coal-liquid suspension conveyor.
  • the solid gas carrier disintegrates in the carbon liquid suspension or reacts with it, so that gas is released.
  • the gas to be added to the coal liquid suspension is preferably carbon dioxide, which is washed out or precipitated from the raw gas produced in the reactor. Before the addition, the washed-out carbon dioxide is dissolved in ammonia water or converted to ammonium carbonate.
  • the salt-laden and dissolved carbon dioxide-containing ammonia water can be subjected to wet grinding with solid fuel or mixed with dry, ground, solid fuel.
  • a coal-liquid suspension is introduced from above into a reactor 1 of a coal gasification plant. This is done with the aid of a pump 2. Together with the coal-liquid suspension, oxygen reaches the reactor 1 through a feed line 3.
  • the reactor 1 has an operating temperature of approximately 1,400 ° C. at an operating pressure of 30 bar.
  • the liquid phase of the coal-liquid suspension consists of water, but it can also have a different consistency, in particular of oil or an oil residue or the like.
  • the water of the coal-liquid suspension evaporates under the influence of the heat in the reactor.
  • the coal reacts with the oxygen and the resulting water vapor.
  • the reaction results in a synthesis gas with a high proportion of carbon monoxide and free hydrogen. This synthesis gas is an important chemical raw material.
  • slag accumulates at the same time, which mainly collects in a water bath in the base of the reactor 1 and is discharged to the ambient air with the aid of a lock 4 while maintaining the operating pressure of 30 bar.
  • the lock 4 consists of a container, each with a valve at the entry and discharge ends. When the entry end is open, 4 slag collects in the container of the lock, which drops through the water bath in the base of the reactor 1.
  • valve at the end of the inlet is closed and the other valve is opened, so that the slag can be removed from the lock 4 container without impairing reactor operation. Then the valve at the discharge end is closed again, the lock 4 is filled with water and the valve at the discharge end is opened.
  • the synthesis gas has optionally already been cooled by a flashing system integrated in the reactor 1. After leaving the reactor 1, further cooling may take place in a waste heat boiler, not shown, before the raw gas enters a carbon dioxide scrubber 5.
  • the carbon dioxide scrubber 5 consists of two pressure vessels 6 and 7, which are connected to one another by lines 8 and 9. There is a pump 10 in line 8 and a throttle 11 in line 9. Line 8 opens into the container foot at each end, while line 9 opens into container 6 at the end facing the container 6 below the level of a water bath 12 .
  • the other end of the line 9 opens into the tank 7 above the level of a water bath 13.
  • the water bath 13 is at the same or a slightly lower pressure than the interior of the reactor 1.
  • the water collecting in the pressure vessel 7 is drawn off with the aid of the pump 10 and returned to the pressure vessel 6 through the line 8.
  • the bath level of the water bath 12 must be above the confluence of the line 9 and the pressure container 6. This is achieved by regulating the throttle 11 and / or the pump 10.
  • the necessary adjustment of the throttle 11 and / or the pump 10 is effected by a float (not shown) in the pressure vessel 6, which is connected to the throttle 11 and / or the pump 10 via a lever linkage and / or a hydraulic system.
  • a loss of water is compensated for from a feed line 14 by means of a slide 15 which is actuated automatically or at intervals from the belt.
  • the carbon dioxide wash 5 can also be operated with alcohol or amine solutions.
  • Alcohol operation requires an operating temperature of approx. 50 ° C.
  • the reaction of the carbon dioxide with the base produces a salt which is drawn off from the container 6 and then subjected to water and heat, so that free carbon dioxide is formed.
  • the dissolved carbon dioxide-containing and salt-laden ammonia water is drawn off by means of a pump 20 at the foot of the container 18 and fed to the coal entry 21.
  • the amount of ammonia water withdrawn is continuously replaced via a feed line 22 and an intermediate valve 23 by means of a pump 24.
  • the coals entering the coal entry 21 together with the ammonia water containing salt and carbon dioxide in dissolved form are wet-ground in a mill 25.
  • the ammonia water can also be fed in behind the mill 25 after the coal has been dry-ground.
  • the carbon dioxide is released again by heating the coal-liquid suspension.
  • the ammonium carbonate breaks down after the addition of small amounts of phosphoric acid.
  • the dosing required for this takes place from a feed line 26.
  • a dosing pump is connected into the feed line 26 for dosing. This can be both a pump delivering continuously via a suitable control valve and an intermittently injecting pump.
  • the carbon dioxide released in the delivery line is created in many small bubbles, which significantly improve the flow behavior of the coal-liquid suspension.
  • the small bubbles have a lower ascent rate than large bubbles and keep the three-substance mixture created by the addition of gas largely stable.
  • gas can be blown in through a large number of small nozzles on the underside of the delivery line with the aid of suitable nozzles between the mill 25 and the reactor 1 or the pump 2 and the reactor 1. Washed out or precipitated carbon dioxide is preferably used again as the gas.
  • nozzles By arranging the nozzles in at least one third of the circumferential area on the underside of the delivery line and by evenly distributing the nozzles, an optimal penetration of gas into the coal-liquid suspension is guaranteed.
  • the nozzles consist of bores in the delivery line and the pipeline leading to the nozzles is formed by a suitable casing of the delivery line.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Industrial Gases (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

1. Process for feeding a suspension of coal into a reactor of a coal gasification plant, characterized in that an ammonium carbonate solution is mixed into the suspension of coal, and the resulting suspension of coal has an acid added to it, and/or is heated.

Description

Die Erfindung betrifft ein Verfahren zum Eintragen einer Hohle-Flüssigkeitssuspensioa in einen Reaktor einer Kohlevergasungsanlage.The invention relates to a method for introducing a hollow liquid suspension into a reactor of a coal gasification plant.

Der Reaktor einer Kohlevergasungsanlage wird vorzugsweise mit Überdruck betrieben.The reactor of a coal gasification plant is preferably operated with positive pressure.

Zur Erzeugung des Überdruckes und zu seiner Aufrechterhaltung werden am Eintrag- und Austragende des Reaktors Schleusen eingesetzt. Dabei machen bestimmte Schleusen am Eintragende, z. B. Pumpen, Schnecken, zumeist die Verwendung einer Flüssigkeit als Trägermittel für die Kohle erforderlich. D.h., Pumpen und dgl. Vorrichtungen benötigen ein pumpfähiges Gemisch, dessen Flüssigkeitsanteil relativ groß ist.To generate the excess pressure and to maintain it, locks are used at the inlet and outlet ends of the reactor. Certain locks at the end of the entry make z. B. pumps, screws, mostly the use of a liquid as a carrier for the coal required. That is, pumps and the like devices require a pumpable mixture whose liquid content is relatively large.

Als Flüssigkeit dient vorzugsweise Wasser, das zugleich zur Erzeugung eines CD und H2 enthaltenden Gases herangezogen wird.Water is preferably used as the liquid, which at the same time is used to generate a gas containing CD and H 2 .

Das geschieht durch Zusammenbringen der pumpfähigen Suspension aus kohlenstoffhaltigem Feststoff und Wasser mit Sauerstoff in einem geeigneten Reaktionsraum.This is done by bringing together the pumpable suspension of carbon-containing solid and water with oxygen in a suitable reaction space.

Die Verwendung von Wasser hat den Nachteil einer ungünstigen Energiebilanz, da ein Überschuß an Wasser verdampft werden muß.The use of water has the disadvantage of an unfavorable energy balance, since an excess of water has to be evaporated.

Der Erfindung liegt daher die Aufgabe zugrunde, die Wirtschaftlichkeit der Kohlevergasung zu verbessern. Dabei geht die Erfindung von dem Gedanken aus, die Wirtschaftlichkeit durch Änderung des Kohleeintrages zu verberzern.The object of the invention is therefore to improve the economy of coal gasification. The invention is based on the idea of mineralizing the economy by changing the coal input.

Das wird dadurch erreicht, daß der Kohle-Flüssigkeitssuspension ein Gas beigemengt wird. Das Gas hat vor allem in feiner Verteilung in der Kohle-Flüssigkeitssnspension eine für das Förderverhalten sehr vorteilhafte Wirkung durch Verringerung der Viskosität und wirkt darüber hinaus positiv auf die Zerstäubung der Suspension am Austritt aus dem Brenner in den Reaktor.This is achieved by adding a gas to the coal-liquid suspension. The gas, especially in fine distribution in the coal-liquid suspension, has a very advantageous effect on the conveying behavior by reducing the viscosity and, moreover, has a positive effect on the atomization of the suspension at the outlet from the burner into the reactor.

Das Gas wird wahlweise durch Düsen in den Fördergang der Kohle- Flüssigkeitssuspension geblasen und/oder der Kohleflüssigkeitssuspension mit einen flüssige.n Gasträger beigemengt. Desgleichen kann Gas mit einem festen Gasträger beigemengt werden. Das Flüssigkeitsgas verdampft im Fördergang der Kohle-Flüssigkeitssuspension. Der feste Gasträger zerfällt in der Kohleflüssigkeitssuspension bzw. reagiert mit ihr, so daß Gas freigesetzt wird.The gas is optionally blown through nozzles into the conveying passage of the coal-liquid suspension and / or mixed with a liquid gas carrier into the coal-liquid suspension. Similarly, gas can be added with a solid gas carrier. The liquid gas evaporates in the coal-liquid suspension conveyor. The solid gas carrier disintegrates in the carbon liquid suspension or reacts with it, so that gas is released.

Als der Kohle-Flüssigkeitssuspension beizumengendes Gas findet vorzugsweise Kohlendioxid Verwendung, das aus dem im Reaktor entstandenen Rohgas ausgewaschen oder ausgefällt wird. Vor der Beimengung wird das ausgewaschene Kohlendioxid in Ammoniakwasser gelöst bzw. zu Ammoniumkarbonat umgewandelt. Das salzbeladene und gelöstes Kohlendioxid enthaltende Ammoniakwasser kann mit festem Brennstoff einer Naßmahlung zugeführt oder mit trockenem, gemahlenem, festem Brennstoff vermischt werden.The gas to be added to the coal liquid suspension is preferably carbon dioxide, which is washed out or precipitated from the raw gas produced in the reactor. Before the addition, the washed-out carbon dioxide is dissolved in ammonia water or converted to ammonium carbonate. The salt-laden and dissolved carbon dioxide-containing ammonia water can be subjected to wet grinding with solid fuel or mixed with dry, ground, solid fuel.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.In the drawing, an embodiment of the invention is shown.

In einen Reaktor 1 einer Kohlevergasungsanlage wird von oben eine Kohle-Flüssigkeitssuspension eingebracht. Das geschieht mit Hilfe einer Pumpe 2. Zusammen mit der Kohle-Flüssigkeitssuspension gelangt Sauerstoff durch eine Zuleitung 3 in den Reaktor 1. In dem Reaktor 1 herrscht eine Betriebstemperatur von ca. 1.4000 C bei einem Betriebsdruck von 30 bar.A coal-liquid suspension is introduced from above into a reactor 1 of a coal gasification plant. This is done with the aid of a pump 2. Together with the coal-liquid suspension, oxygen reaches the reactor 1 through a feed line 3. The reactor 1 has an operating temperature of approximately 1,400 ° C. at an operating pressure of 30 bar.

Die Plüssigkeitsphase der Kohle-Flüssigkeitssuspension besteht im Ausführungsbeispiel aus Wasser, sie kann aber auch eine andere Konsistenz haben, insbesondere aus Öl oder einem Ölrückstand oder dergleichen bestehen. Das Wasser der Kohle- Flüssigkeitssuspension verdampft unter der Einwirkung der in dem Reaktor herrschenden Wärme. Es reagiert die Kohle mit dem Sauerstoff und dem entstandenen Wasserdampf. Die Reaktion ergibt ein Synthesegas mit hohem Anteil an Kohlenmonoxyd und freiem Wasserstoff. Dieses Synthesegas ist ein wichtiger Chemierohstoff.In the exemplary embodiment, the liquid phase of the coal-liquid suspension consists of water, but it can also have a different consistency, in particular of oil or an oil residue or the like. The water of the coal-liquid suspension evaporates under the influence of the heat in the reactor. The coal reacts with the oxygen and the resulting water vapor. The reaction results in a synthesis gas with a high proportion of carbon monoxide and free hydrogen. This synthesis gas is an important chemical raw material.

Mit dem Synthesegas fällt gleichzeitig Schlacke an, die sich überwiegend in einem Wasserbad im Fuß des Reaktors 1 sammelt und mit Hilfe einer Schleuse 4 unter Aufrechterhaltung des Betriebsdruckes von 30 bar an die Umgebungsluft ausgetragen wird.With the synthesis gas, slag accumulates at the same time, which mainly collects in a water bath in the base of the reactor 1 and is discharged to the ambient air with the aid of a lock 4 while maintaining the operating pressure of 30 bar.

Die Schleuse 4 besteht aus einem Behälter mit jeweils einem Ventil am Eintrag- und Austragende. Bei geöffnetem Eintragende sammelt sich ir dem Behälter der Schleuse 4 Schlacke, die durch das Wasserbad im Fuß des Reaktors 1 absinkt.The lock 4 consists of a container, each with a valve at the entry and discharge ends. When the entry end is open, 4 slag collects in the container of the lock, which drops through the water bath in the base of the reactor 1.

Nach Erreichen eines bestimmten Füllungsgrades in dem Behälter wird das Ventil am Eintragende geschlossen und das andere Ventil geöffnet, so daß die Schlacke ohne Beeinträchtigung des Reaktorbetriebes aus dem Behälter der Schleuse 4 abgefördert werden kann. Danach wird das Ventil am Austragende wieder geschlossen, die Schleuse 4 mit Wasser gefüllt und das Ventil am Eintragende geöffnet.After a certain degree of filling in the container has been reached, the valve at the end of the inlet is closed and the other valve is opened, so that the slag can be removed from the lock 4 container without impairing reactor operation. Then the valve at the discharge end is closed again, the lock 4 is filled with water and the valve at the discharge end is opened.

Ein anderer Teil der im Reaktor 1 anfallenden Schlacke, der flugfähige Schlackenteil, wird mit dem Synthesegas aus dem Reaktor 1 ausgetragen. Dabei hat das Synthesegas wahlweise durch ein in den Reaktor 1 integriertes Abbitzesystem bereits eine Kühlung erfahren. Nach dem Austritt aus dem Reaktor 1 erfolgt ggf. eine weitere Kühlung in einem nicht dargestellten Abhitzekessel, bevor das Rohgas in eine Kohlendioxydwäsche 5 eintritt.Another part of the slag obtained in the reactor 1, the flyable slag part, is discharged from the reactor 1 with the synthesis gas. The synthesis gas has optionally already been cooled by a flashing system integrated in the reactor 1. After leaving the reactor 1, further cooling may take place in a waste heat boiler, not shown, before the raw gas enters a carbon dioxide scrubber 5.

Die Kohlendioxidwäsche 5 besteht aus zwei Druckbehältern 6 und 7, die durch Leitungen 8 und 9 miteinander verbunden sind. In der Leitung 8 befindet sich eine Pumpe 10 und in der Leitung 9 eine Drossel 11. Die Leitung 8 mündet an jedem Ende im Behälterfuß, während die Leitung 9 an dem dem Behälter 6 zugewandtem Ende unterhalb des Badspiegels eines Wasserbades 12 in den Behälter 6 mündet.The carbon dioxide scrubber 5 consists of two pressure vessels 6 and 7, which are connected to one another by lines 8 and 9. There is a pump 10 in line 8 and a throttle 11 in line 9. Line 8 opens into the container foot at each end, while line 9 opens into container 6 at the end facing the container 6 below the level of a water bath 12 .

Das andere Ende der Leitung 9 mündet oberhalb des Badspiegels eines Wasserbades 13 in den Behälter 7. Das Wasserbad 13 steht unter dem gleichen bzw. einem geringfügig niedrigeren Druck wie der Innenraum des Reaktors 1.The other end of the line 9 opens into the tank 7 above the level of a water bath 13. The water bath 13 is at the same or a slightly lower pressure than the interior of the reactor 1.

Infolge dieses Druckes löst sich ein wesentlicher Teil des im Rohgas enthaltenen Kohlendioxids im Wasser. Das so mit Kohlendioxyd angereicherte Wasser dringt infolge eines großen Druckgefälles zwischen den beiden Behältern 6 und 7 durch die Leitung 9 und die Drossel 11 in den Behälter 7. Dabei wird der Wasserdruck mit Hilfe der Drossel 11 auf ein gewünschtes Maß, den Druck im Behälter 7, reduziert. Während und nach dem Druckabfall perlt das im Wasser enthaltende Kohlendioxyd aus.As a result of this pressure, a substantial part of the carbon dioxide contained in the raw gas dissolves in the water. The water thus enriched with carbon dioxide penetrates into the container 7 as a result of a large pressure gradient between the two containers 6 and 7 through the line 9 and the throttle 11 , reduced. During and after the pressure drop, the carbon dioxide contained in the water bubbles out.

Das sich im Druckbehälter 7 sammelnde Wasser wird mit Hilfe der Pumpe 10 abgezogen und durch die Leitung 8 dem Druckbehälter 6 zurückgeführt.The water collecting in the pressure vessel 7 is drawn off with the aid of the pump 10 and returned to the pressure vessel 6 through the line 8.

Damit das durch das Wasserbad 12 im Behälter 6 strömende Rohgas nicht in die Leitung 9 tritt, muß der Badspiegel des Wasserbades 12 oberhalb der Einmündung der Leitung 9 in den Druckbehälter 6 stehen. Das wird durch eine Regelung der Drossel 11 und/oder der Pumpe 10 erreicht. Die notwendige Verstellung der Drossel 11 und/oder der Pumpe 10 bewirkt ein nicht dargestellter Schwimmer im Druckbehälter 6, der über ein Hebelgestänge und/oder eine Hydraulikanlage mit der Drossel 11 und/oder der Pumpe 10 verbunden ist.So that the raw gas flowing through the water bath 12 in the container 6 does not enter the line 9, the bath level of the water bath 12 must be above the confluence of the line 9 and the pressure container 6. This is achieved by regulating the throttle 11 and / or the pump 10. The necessary adjustment of the throttle 11 and / or the pump 10 is effected by a float (not shown) in the pressure vessel 6, which is connected to the throttle 11 and / or the pump 10 via a lever linkage and / or a hydraulic system.

Ein Wasserverlust wird aus einer Speiseleitung 14 über einen automatisch oder in Abständen von Band betätigten Schieber 15 ausgeglichen.A loss of water is compensated for from a feed line 14 by means of a slide 15 which is actuated automatically or at intervals from the belt.

Zusammen mit dem Kohlendioxyd aus dem Rohgas ausgewaschene Schlacke wird in einem nicht dargestellten, in die Leitung 8 geschalteten Eindicker gesammelt und abgeführt.Slag washed out of the raw gas together with the carbon dioxide is collected in a thickener (not shown) connected to line 8 and discharged.

Anstelle von Wasser kann die Kohlendioxydwäsche 5 auch mit Alkohol oder Aminlösungen betrieben werden. Der Alkoholbetrieb erfordert eine Betriebstemperatur von ca. 50° C.Instead of water, the carbon dioxide wash 5 can also be operated with alcohol or amine solutions. Alcohol operation requires an operating temperature of approx. 50 ° C.

Ferner kann ein sogenanntes Ausfällen an die Stelle der Bohlendioxydwäsche treten. Bein Ausfällen wird gezielt nur das Kohlendioxyd aus dem Rohgas entfernt, während bei der üblichen Kohlendioxydwäsche zumeist auch ein unerwünschtes Auswaschen anderer Bestandteile auftritt. Zum Ausfällen des Kohlendioxyds dient dann eine Base im Behälter 6.So-called precipitation can also take the place of screed washing. In the event of failures, only the carbon dioxide is deliberately removed from the raw gas, while in the usual carbon dioxide scrubbing there is usually also an undesired washing out of other components. A base in container 6 then serves to precipitate the carbon dioxide.

Durch Reaktion des Kohlendioxyds mit der Base entsteht ein Salz, das aus dem Behälter 6 abgezogen und dann mit Wasser und Wärme beaufschlagt wird, so daß freies Kohlendioxyd entsteht.The reaction of the carbon dioxide with the base produces a salt which is drawn off from the container 6 and then subjected to water and heat, so that free carbon dioxide is formed.

Das sich im Behälter 7 oberhalb des Wasserbades 13 sammelnde Kohlendioxyd dringt durch eine Leitung 16 mit zvischengeschaltetem Rückschlagventil 17 in einen Behälter 18. In dem Behälter 18 befindet sich konzentriertes Ammoniakwasser. Beim Durchströmen des Behälters 18 und des Ammoniakwasaers wird ein wesentlicher Teil des Kohlendioxyds in dem Ammoniakwasser gelöst bzw. zu Ammoniumkarbonat umgewandelt. Das verbleibende Kohlendioxyd tritt durch eine Leitung 19 aus.The carbon dioxide collecting in the container 7 above the water bath 13 penetrates through a line 16 with an intermediate check valve 17 into a container 18. The container 18 contains concentrated ammonia water. When flowing through the container 18 and the ammonia water, a substantial part of the carbon dioxide is dissolved in the ammonia water or converted to ammonium carbonate. The remaining carbon dioxide exits through a line 19.

Das gelöstes Kohlendioxyd enthaltende und salzbelandene Ammoniakwasser wird mittels einer Pumpe 20 am Fuß des Behälters 18 abgezogen und, dem Kohleneintrag 21 zugeführt. Die abgezogene Ammoniakvassermenge wird über eine Speiseleitung 22 und ein zwischengeschaltetes Ventil 23 mit Hilfe einer Pumpe 24 fortlaufend ersetzt.The dissolved carbon dioxide-containing and salt-laden ammonia water is drawn off by means of a pump 20 at the foot of the container 18 and fed to the coal entry 21. The amount of ammonia water withdrawn is continuously replaced via a feed line 22 and an intermediate valve 23 by means of a pump 24.

Die zusammen mit den salzbeladenen und Kohlendioxyd in gelöster Form enthaltenden Ammoniakwasser in den Kohleneintrag 21 gelangenden Kohlen werden in einer Mühle 25 nass gemahlen. Das Ammoniakvasser kann aber auch nach trockener Mahlung der Kohle hinter der Mühle 25 zugeführt werden.The coals entering the coal entry 21 together with the ammonia water containing salt and carbon dioxide in dissolved form are wet-ground in a mill 25. However, the ammonia water can also be fed in behind the mill 25 after the coal has been dry-ground.

In der Förderleitung zum Reaktor 1 wird das Kohlendioxyd durch Erwärmen der Kohle-Flüssigkeitssuspenton wieder frei. Das Ammoniumcarbonat zerfällt nach der Beimengung kleiner Mengen Phosphorsäure. Die dazu notwendige Dosierung erfolgt aus einer Zuleitung 26. Zum Dosieren ist eine Dosierpumpe in die Zuleitung 26 geschaltet. Dabei kann es sich sowohl um eine kontinuierlich über ein geeignetes Steuerventil fördernde Pumpe als auch um eine intermittierend einspritzende Pumpe handeln.In the delivery line to reactor 1, the carbon dioxide is released again by heating the coal-liquid suspension. The ammonium carbonate breaks down after the addition of small amounts of phosphoric acid. The dosing required for this takes place from a feed line 26. A dosing pump is connected into the feed line 26 for dosing. This can be both a pump delivering continuously via a suitable control valve and an intermittently injecting pump.

Das in der Förderleitung freiwerdende Kohlendioxyd entsteht in vielen kleinen Bläschen, die das Fließverhalten der Kohle- Flüssigkeitssuspension erheblich verbessern.The carbon dioxide released in the delivery line is created in many small bubbles, which significantly improve the flow behavior of the coal-liquid suspension.

Die kleinen Bläschen haben eine geringere Aufstiegsgeschwindigkeit als große Blasen und halten das durch die Beimengung von Gas entstandene Dreistoffgemisch weitgehend stabil.The small bubbles have a lower ascent rate than large bubbles and keep the three-substance mixture created by the addition of gas largely stable.

Zusätzlich zur Beimengung flüssiger oder fester Gasträger kann mit Hilfe geeigneter Düsen zwischen der Mühle 25 und dem Reaktor 1 bzw. der Pumpe 2 und dem Reaktor 1 Gas durch eine Vielzahl kleiner Düsen an der Unterseite der Förderleitung eingeblasen werden. Als Gas findet dabei vorzugsweise wieder ausgewaschenes oder ausgefälltes Kohlendioxyd Verwendung.In addition to the admixture of liquid or solid gas carriers, gas can be blown in through a large number of small nozzles on the underside of the delivery line with the aid of suitable nozzles between the mill 25 and the reactor 1 or the pump 2 and the reactor 1. Washed out or precipitated carbon dioxide is preferably used again as the gas.

Durch Anordnung der Düsen in mindestens einem Drittel des Umfangsbereiches an der Unterseite der Förderleitung und durch eine gleichmäßige Düsenverteilung ist ein optimales Eindringen von Gas in die Kohle-Flüssigkeitssuspension gewährleistet.By arranging the nozzles in at least one third of the circumferential area on the underside of the delivery line and by evenly distributing the nozzles, an optimal penetration of gas into the coal-liquid suspension is guaranteed.

In einfachsten Fall bestehen die Düsen aus Bohrungen in der Förderleitung und wird die zu den Düsen führende Rohrleitung durch eine geeignete Ummantelung der Förderleitung gebildet.In the simplest case, the nozzles consist of bores in the delivery line and the pipeline leading to the nozzles is formed by a suitable casing of the delivery line.

Claims (9)

1. Verfahren zum Eintragen einer Kohle-Flüssigkeitssuspension in einen Reaktor einer Kohlevergasungsanlage, dadurch gekennzeichnet, daß der Suspension ein Gas beigemengt wird.1. A process for introducing a coal liquid suspension into a reactor of a coal gasification plant, characterized in that a gas is added to the suspension. 2. Verfahren nach Anspruch 1, gekennzeichnet durch eine Verteilung kleiner Gasbläschen in der Kohle-Flüssigkeissuspension.2. The method according to claim 1, characterized by a distribution of small gas bubbles in the coal-liquid suspension. 3. Verfahren nach Anspruch 1 oder 2, gekennzeichnet durch die Beimengung von Flüssigkeitsgas.3. The method according to claim 1 or 2, characterized by the admixture of liquid gas. 4. Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, gekennzeichnet durch die Beimengung fester Gasträger.4. The method according to one or more of claims 1 to 3, characterized by the addition of solid gas carriers. 5. Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, gekennzeichnet durch aus dem Rohgas ausgewaschenes oder ausgefälltes Kohlendioxid.5. The method according to one or more of claims 1 to 4, characterized by carbon dioxide washed out or precipitated from the raw gas. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß das ausgewaschene Kohlendioxid in Ammonikwasser gelöst und/oder zu Ammoniumkarbonat umgewandelt wird.6. The method according to claim 5, characterized in that the washed-out carbon dioxide is dissolved in ammonia water and / or converted to ammonium carbonate. 7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß fester Brennstoff mit salzbeladenem und gelöstes Kohlendioxid enthaltendem Ammoniakwasser einer Naßmahlung zugeführt oder das Ammoniakwasser mit trockenem, gemahlenem, festem Brennstoff vermischt vird.7. The method according to claim 6, characterized in that solid fuel with salt-laden and dissolved carbon dioxide-containing ammonia water is fed to a wet grinding or the ammonia water is mixed with dry, ground, solid fuel. 8. Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß das Ammoniumkarbonat während und/oder nach der Beimengung des Amoniakwassers zur Kohle-Flüssigkeitssuspension mit Wärme und/oder einer Säure beaufschlag wird.8. The method according to claim 6 or 7, characterized in that the ammonium carbonate is subjected to heat and / or an acid during and / or after the addition of the ammonia water to the coal-liquid suspension. 9. Verfahren nach Anspruch 8, gekennzeichnet durch Phosphorsäure.9. The method according to claim 8, characterized by phosphoric acid.
EP79102116A 1978-06-29 1979-06-26 Process for feeding coal into a coal gasification reactor Expired EP0009073B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782828457 DE2828457A1 (en) 1978-06-29 1978-06-29 ENTRY OF COAL INTO A COAL GASIFICATION PLANT
DE2828457 1978-06-29

Publications (2)

Publication Number Publication Date
EP0009073A1 true EP0009073A1 (en) 1980-04-02
EP0009073B1 EP0009073B1 (en) 1982-06-16

Family

ID=6043046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102116A Expired EP0009073B1 (en) 1978-06-29 1979-06-26 Process for feeding coal into a coal gasification reactor

Country Status (9)

Country Link
EP (1) EP0009073B1 (en)
JP (1) JPS5844111B2 (en)
AU (1) AU533129B2 (en)
BR (1) BR7904150A (en)
CA (1) CA1161254A (en)
DE (2) DE2828457A1 (en)
PL (1) PL120472B1 (en)
SU (1) SU936817A3 (en)
ZA (1) ZA793254B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5849790A (en) * 1981-09-19 1983-03-24 Kawasaki Heavy Ind Ltd Gasification of coal
JPS58136694A (en) * 1982-02-08 1983-08-13 Kawasaki Heavy Ind Ltd Coal gasification
JPS58154796A (en) * 1982-03-09 1983-09-14 Ube Ind Ltd Partial oxidation of solid fuel/water slurry
DE4129037C2 (en) * 1991-08-31 1995-03-30 Steag Ag Method for introducing fuel into a fuel gasifier coupled to a power plant

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130120A1 (en) * 1971-06-18 1973-01-04 Texaco Development Corp Synthesis gas from coke slurry withoutpreheating
US3929429A (en) * 1974-09-26 1975-12-30 Texaco Inc Fuel gas from solid carbonaceous fuels
US4007017A (en) * 1975-12-22 1977-02-08 Slater William L Production of clean synthesis or fuel gas
US4040976A (en) * 1976-07-06 1977-08-09 Cities Service Company Process of treating carbonaceous material with carbon dioxide
DE2631185A1 (en) * 1976-07-10 1978-01-19 Texaco Development Corp Gasification of solid carbonaceous fuels - slurried in liquid carbon dioxide, by continuous partial oxidation
US4074981A (en) * 1976-12-10 1978-02-21 Texaco Inc. Partial oxidation process

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130120A1 (en) * 1971-06-18 1973-01-04 Texaco Development Corp Synthesis gas from coke slurry withoutpreheating
US3929429A (en) * 1974-09-26 1975-12-30 Texaco Inc Fuel gas from solid carbonaceous fuels
US4007017A (en) * 1975-12-22 1977-02-08 Slater William L Production of clean synthesis or fuel gas
US4040976A (en) * 1976-07-06 1977-08-09 Cities Service Company Process of treating carbonaceous material with carbon dioxide
DE2631185A1 (en) * 1976-07-10 1978-01-19 Texaco Development Corp Gasification of solid carbonaceous fuels - slurried in liquid carbon dioxide, by continuous partial oxidation
US4074981A (en) * 1976-12-10 1978-02-21 Texaco Inc. Partial oxidation process

Also Published As

Publication number Publication date
ZA793254B (en) 1980-08-27
DE2828457A1 (en) 1980-01-10
EP0009073B1 (en) 1982-06-16
DE2963101D1 (en) 1982-08-05
PL120472B1 (en) 1982-03-31
CA1161254A (en) 1984-01-31
JPS557893A (en) 1980-01-21
JPS5844111B2 (en) 1983-09-30
AU533129B2 (en) 1983-11-03
BR7904150A (en) 1980-03-25
SU936817A3 (en) 1982-06-15
PL216682A1 (en) 1980-05-19
AU4850279A (en) 1980-01-03

Similar Documents

Publication Publication Date Title
DE2455127A1 (en) PROCEDURE FOR THE EXTRACTION OF RESIDUES FROM AN INCREASED PRESSURE GASIFICATION AREA
DE2609320C3 (en) Coal gasifier
EP0335071B1 (en) Process and apparatus for pneumatically conveying a finely granulated to powdered fuel into a high pressure gasification reactor
DE2335659C2 (en) Process for generating a methane-containing gas
DE2543532C3 (en) Process for the gravity separation of an aqueous tar-containing condensate
DE19611093C2 (en) Method and device for enriching a liquid with a gas
EP0009073A1 (en) Process for feeding coal into a coal gasification reactor
CH625548A5 (en)
EP0044948A1 (en) Process and apparatus for the production of gas from, especially, agricultural waste products
DE3426912C2 (en)
DE936766C (en) Process and gas generator for the production of carbon-oxide-rich and low-methane gases by gasifying fuels and using the gases produced
DE4142015A1 (en) METHOD FOR REMOVING H (DOWN ARROW) 2 (DOWN ARROW) S FROM GASES
DE3519830A1 (en) METAL OF COAL HYDRATION WITH INTEGRATED REFINING STAGES
DE4226487C1 (en) Dewatered clarification sludge feed to disposal reactor - includes temp. pressure treatment before entry into reactor then atomisation within reactor
DE3240384A1 (en) METHOD AND DEVICE FOR GASIFYING RESIDUES FROM THE HYDRATING LIQUIDATION OF COAL IN A FLUID BED OR FLOW CURRENT CARBURETTOR
DE3028448C2 (en) Method of cooling hot coke
DD236343A1 (en) METHOD FOR RECYCLING TAR-DUST MIXTURES IN GENERATORS IN FEST-BED GASIFICATION
DE2603295A1 (en) Coal gasification under pressure - by cooling synthesis gas in waste heat dual circuit boiler at high pressure and temp. over tar dew point
EP0456071A1 (en) Apparatus and process for waste water treatment
DE2241476A1 (en) Washing of gases from petroleum cracking - with addition of petrol fraction to prevent polymer deposition
DE891686C (en) Process and device for the production of ammonium carbonate and bicarbonate by saturating ammonia water with carbonic acid
DE612432C (en) Removal of tar acids from liquids
DE631788C (en) Process for removing and recovering oils from distillation gases sucked out of the interior of the chamber filling under reduced pressure
DE3033289A1 (en) METHOD FOR PRODUCING DEUTERIUM-ENRICHED WATER WHEN RECOVERING HYDROGEN
AT116804B (en) Method and device for the production of an emulsion from flaxseed as a means for preventing scale formation or for removing scale.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB NL

17P Request for examination filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE FR GB NL

REF Corresponds to:

Ref document number: 2963101

Country of ref document: DE

Date of ref document: 19820805

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950524

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960516

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960614

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19960630

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19960726

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19970228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970626

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19970630

BERE Be: lapsed

Owner name: RUHRCHEMIE A.G.

Effective date: 19970630

Owner name: RUHRKOHLE A.G.

Effective date: 19970630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19980101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970626

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19980101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980303

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT