WO2019185199A1 - Method and device for processing soot water - Google Patents
Method and device for processing soot water Download PDFInfo
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- WO2019185199A1 WO2019185199A1 PCT/EP2019/025072 EP2019025072W WO2019185199A1 WO 2019185199 A1 WO2019185199 A1 WO 2019185199A1 EP 2019025072 W EP2019025072 W EP 2019025072W WO 2019185199 A1 WO2019185199 A1 WO 2019185199A1
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- water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
- C10K1/101—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids with water only
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Definitions
- the invention relates to a method for cooling and / or scrubbing a hot soot-laden gas stream in direct contact with water, wherein a so-called soot water slurry having a temperature of at least 100 ° C and a pressure of more than 10bar (a) is obtained , from the solids with the help of a
- High-pressure filter system to be separated from the soot water in the solid content reduced filtrate for cooling and / or scrubbing of the hot, with soot-laden gas stream and one containing the separated solids
- Coal or heavy oil are thereby introduced together with an oxidant and steam and possibly carbon dioxide in a reaction space, where they are converted to a hydrogen and carbon monoxide rich mixture, which also contains carbon dioxide and water vapor and solids, which are in particular soot particles caused by incomplete implementation of the carbon in use.
- the substance mixture referred to as synthesis crude gas which leaves the reaction space typically at a temperature between 1000 and 1500 ° C and a pressure between 30 and 80bar (a) is first cooled (quenched) in a water bath or by the injection of water to a temperature which usually in the range of 180 to 300 ° C, wherein mineral components solidify into slag particles.
- soot which is subsequently processed to obtain a largely solids-free water fraction, brought back to process pressure by means of pumps, recycled and again at the Cooling or scrubbing of the synthesis raw gas is used.
- soot water present with a solids content of between 1 and 3% by weight is usually fed to a filter device whose
- Filter elements Retain solids, while water can pass as a filtrate largely unhindered.
- suitable filter elements can often be operated only at relatively low temperatures of less than 50 ° C, which is why it is necessary to cool the soot water upstream of the filter device, which is only partially possible with the help of heat exchangers, as contained in the soot Lead solids to transfers.
- the soot water is therefore cooled by relaxation, with several due to the highly abrasive effect of the solids
- the carbon monoxide contained in the synthesis crude gas is converted with water into hydrogen and carbon dioxide in a subsequent process step, it is endeavored to enrich the synthesis gas already during the water washing or quenching with a large part or the total amount of water required in the conversion step, so that only little or no additional steam addition is required. Since the synthesis gas can absorb less water, the lower the temperature of the wash water, a low temperature of the treated and recycled water of less than 50 ° C is very disadvantageous. Although it is conditionally possible, the treated water in its return by
- DE1020100140493 a process in which the solids are separated from the uncooled soot water by means of hydrocyclones, while DE 3537493 alternatively provides for the use of pressurized gravity or Koaleszier- separators. Especially because of the dubious degree of separation of Hydrocyclones and the considerable expenditure on equipment, however, these methods are not very attractive.
- soot water is fed without pressure reduction to a high-pressure filter system in which quench water is separated off in addition to quench water, a liquid phase rich in solids.
- quench water is separated off in addition to quench water, a liquid phase rich in solids.
- the solids-rich liquid phase is then cooled by expansion and fed without pressure to a conventional filter device.
- the recovered water In order to be able to use the recovered water as quench water, it must be pumped back to process pressure.
- Object of the present invention is therefore to provide a method and an apparatus of the generic type, by which it is possible to cool hot, loaded with soot and slag gas streams economically and wash, as is possible in the prior art.
- this object is achieved in that the filter cake is obtained largely dry by means of a pulsation filter, which is part of the high-pressure filter system.
- At least the soot particles contained in the soot water have a high free pore volume, which is usually filled with water, which can not be recovered by filtering and therefore also exists as part of the filter cake. As largely dry the filter cake should therefore apply, if the
- a method for the treatment of soot water using a pulsation filter is known for example from the patent US8728328, wherein the soot water is introduced into a settling tank after a decompression into vacuum, withdrawn from the so-called gray water and fed without pressure to the pulsation filter.
- the pulsation filter is operated at a significantly higher pressure of more than 10 bar (a), so that the resulting filtrate, which largely consists of water, has a correspondingly high level
- the resulting filtrate usefully has a purity which allows its immediate use in the cooling or washing of the hot soot laden gas stream.
- the soot water upstream of the pulsation filter is subjected to no throttling except for unavoidable line losses, so that the filtrate leaves the high-pressure filter system at a pressure substantially equal to the pressure at which the soot water is produced. The return of the filtrate can therefore be carried out with comparatively little expenditure of energy.
- a preferred embodiment of the invention provides to introduce the soot water at a temperature in the pulsation filter, which is in a range between 100 ° C and the maximum allowable, lying above 100 ° C operating temperature of the pulsation filter. If the soot water precipitates at a temperature below the maximum permissible operating temperature of the pulsation filter, the soot water, preferably upstream of the pulsation filter, is not cooled down to unavoidable line losses, so that the filtrate discharges
- High-pressure filter system leaves with a temperature that is essentially the
- the process according to the invention is suitable in principle for the cooling and / or washing of any hot gas streams laden with soot. With particular preference, however, it can be used in the treatment of a synthesis gas obtained by the gasification of solid or liquid carbonaceous feedstocks.
- the invention relates to a device for cooling and / or scrubbing a hot, loaded with carbon black gas stream in direct contact with water, with a cooling device and / or a water scrubber and a high pressure filter system, referred to as soot water, in the cooling device and / or the
- the high-pressure filter system comprises a pulsation filter with which the filter cake can be recovered largely dry.
- the pulsation filter is expediently designed with a pressure vessel in which a plurality of filter elements are arranged, which consist of either a porous metal or plastic or have a perforated carrier over which a filter cloth is stretched from a heat-resistant material.
- a pressure vessel in which a plurality of filter elements are arranged, which consist of either a porous metal or plastic or have a perforated carrier over which a filter cloth is stretched from a heat-resistant material.
- Filter elements that can be formed as a tube or flat plate, the expert distinguishes Pulse Tube Filter and Pressure Leaf Filter.
- the pressure vessel is designed such that the pulsation filter is designed for an operating pressure which is higher than the pressure at which the soot water is produced.
- the filter elements of the pulsation filter are made of a material which is resistant to a temperature which is higher than the temperature at which the soot water is obtained.
- no means for relaxation and / or cooling of the soot water are arranged upstream of the pulsation filter.
- FIG. 1 shows the use of the invention for cooling and scrubbing a synthesis raw gas.
- the soot and mineral obtained in the gasification device V for example, from a carbon-containing refinery residue by partial oxidation
- Synthesis crude gas 1 contained components is introduced at a pressure between 30 to 80bar (a) in the quenching device Q, to without significant pressure loss in direct contact with quench water 2 to the saturation temperature of up to 240 ° C. to be cooled to produce a first slurry 3 containing carbon black and slag-solidified mineral components.
- Synthesis raw gas 4 is then subjected to a wash W, wherein remaining solids are separated off, for example, in a combination Venturi scrubber and wash column with the aid of wash water 5, so that a largely solids-free synthesis gas 6 for further treatment (not shown) can be deducted.
- a wash W wherein remaining solids are separated off, for example, in a combination Venturi scrubber and wash column with the aid of wash water 5, so that a largely solids-free synthesis gas 6 for further treatment (not shown) can be deducted.
- soot water 8 is supplied to the high-pressure filter device H arranged pulsation filter P without cooling and relaxation, whose consisting of a sufficiently heat-resistant material filter elements F are arranged in a pressure vessel D. Due to its low residual moisture, the filter cake 9 available in the pulsation filter P can be without an additional moisture content
- Drainage step may be disposed of by landfilling or incineration.
- the water contained in the soot 8 remains almost completely and with only slightly reduced pressure and temperature values in the filtrate 10, which is recycled with comparatively low energy input via the pump C, after splitting into a first 1 1 and a second partial stream 12 the quench water. 2 and the washing water 5 to be supplied.
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Abstract
Description
Beschreibung description
Verfahren und Vorrichtung zur Aufbereitung von Rußwasser Process and device for the treatment of soot water
Die Erfindung betrifft ein Verfahren zur Abkühlung und/oder Wäsche eines heißen, mit Ruß beladenen Gasstroms in direktem Kontakt mit Wasser, wobei eine als Rußwasser bezeichnete Aufschlämmung mit einer T emperatur von wenigstens 100°C und einem Druck von mehr als 10bar(a) anfällt, von der Feststoffe mit Hilfe eines The invention relates to a method for cooling and / or scrubbing a hot soot-laden gas stream in direct contact with water, wherein a so-called soot water slurry having a temperature of at least 100 ° C and a pressure of more than 10bar (a) is obtained , from the solids with the help of a
Hochdruckfiltersystems abgetrennt werden, um ein gegenüber dem Rußwasser im Feststoffgehalt reduziertes Filtrat zur Abkühlung und/oder Wäsche des heißen, mit Ruß beladenen Gasstroms sowie einen, die abgetrennten Feststoffe enthaltenden High-pressure filter system to be separated from the soot water in the solid content reduced filtrate for cooling and / or scrubbing of the hot, with soot-laden gas stream and one containing the separated solids
Filterkuchen zu gewinnen. To win filter cake.
Verfahren und Vorrichtungen der gattungsgemäßen Art werden insbesondere zur Abkühlung und Wäsche von Syntheserohgasen eingesetzt, die bei der Vergasung von kohlenstoffhaltigen festen und flüssigen Einsätzen durch Partielle Oxidation gewonnen werden. Die Einsätze, bei denen es sich beispielsweise um Raffinerierückstände,Methods and devices of the generic type are used in particular for cooling and scrubbing of syngas, which are obtained by gasification of carbonaceous solid and liquid inserts by partial oxidation. The missions, which are, for example, refinery residues,
Kohle oder Schweröl handelt, werden dabei gemeinsam mit einem Oxidationsmittel sowie Dampf und evtl. Kohlendioxid in einen Reaktionsraum eingeleitet, wo sie zu einem Wasserstoff- und kohlenmonoxidreichen Stoffgemisch umgesetzt werden, das auch Kohlendioxid und Wasserdampf sowie Feststoffe enthält, bei denen es sich insbesondere um Rußpartikel handelt, die durch unvollständige Umsetzung des im Einsatz enthaltenen Kohlenstoffs entstehen. Das als Syntheserohgas bezeichnete Stoffgemisch, das den Reaktionsraum typischerweise mit einer Temperatur zwischen 1000 und 1500°C und einem Druck zwischen 30 und 80bar(a) verlässt, wird zunächst im Wasserbad oder durch die Eindüsung von Wasser auf eine Temperatur abgekühlt (gequencht), die gewöhnlich im Bereich von 180 bis 300°C liegt, wobei mineralische Komponenten zu Schlackepartikeln erstarren. Anschließend werden Feststoffe aus dem abgekühlten Gas beispielsweise in einer Kombination aus Venturiwäscher und Wasserwaschkolonne abgetrennt. Sowohl bei der Abkühlung im Wasserbad als auch in den Waschschritten fällt mit Ruß und Schlackepartikeln beladenes sog. Rußwasser an, das nachfolgend aufbereitet wird, um eine weitgehend feststofffreie Wasserfraktion zu erhalten, die mit Hilfe von Pumpen wieder auf Prozessdruck gebracht, zurückgeführt und erneut bei der Abkühlung oder Wäsche des Syntheserohgases verwendet wird. Zu seiner Aufbereitung wird das mit einem Feststoffgehalt zwischen 1 und 3Gew.-% vorliegende Rußwasser üblicherweise einer Filtereinrichtung zugeführt, deren Coal or heavy oil, are thereby introduced together with an oxidant and steam and possibly carbon dioxide in a reaction space, where they are converted to a hydrogen and carbon monoxide rich mixture, which also contains carbon dioxide and water vapor and solids, which are in particular soot particles caused by incomplete implementation of the carbon in use. The substance mixture referred to as synthesis crude gas, which leaves the reaction space typically at a temperature between 1000 and 1500 ° C and a pressure between 30 and 80bar (a) is first cooled (quenched) in a water bath or by the injection of water to a temperature which usually in the range of 180 to 300 ° C, wherein mineral components solidify into slag particles. Subsequently, solids are separated from the cooled gas, for example in a combination Venturi scrubber and water wash column. Both during cooling in a water bath and in the washing steps charged with soot and slag particles laden so-called. Soot, which is subsequently processed to obtain a largely solids-free water fraction, brought back to process pressure by means of pumps, recycled and again at the Cooling or scrubbing of the synthesis raw gas is used. For its preparation, the soot water present with a solids content of between 1 and 3% by weight is usually fed to a filter device whose
Filterelemente Feststoffe zurückhalten, während Wasser als Filtrat weitgehend ungehindert passieren kann. Für diesen Einsatzzweck geeignete Filterelemente können häufig nur bei vergleichsweise geringen Tempertaturen von weniger als 50°C betrieben werden, weshalb es erforderlich ist, das Rußwasser stromaufwärts der Filtereinrichtung zu kühlen, was allerdings mit Hilfe von Wärmeübertragern nur bedingt möglich ist, da die im Rußwasser enthaltenen Feststoffe zu Verlegungen führen. Nach dem Stand der Technik wird das Rußwasser daher durch Entspannung abgekühlt, wobei wegen der stark abrasiven Wirkung der Feststoffe mehrere Filter elements Retain solids, while water can pass as a filtrate largely unhindered. For this purpose suitable filter elements can often be operated only at relatively low temperatures of less than 50 ° C, which is why it is necessary to cool the soot water upstream of the filter device, which is only partially possible with the help of heat exchangers, as contained in the soot Lead solids to transfers. According to the prior art, the soot water is therefore cooled by relaxation, with several due to the highly abrasive effect of the solids
Entspannungsschritte erforderlich sind, die mit einem entsprechend hohen apparativen Aufwand durchgeführt werden müssen. Unter Umständen ist eine Entspannung bis in den Vakuumbereich notwendig, um die gewünschte Abkühlung zu erreichen. In diesem Fall besteht ein erhöhtes Risiko für den Eintrag von Sauerstoff in das System, der insbesondere in Verbindung mit im Rußwasser vorhandenen Chloriden zu Relaxation steps are required, which must be carried out with a correspondingly high expenditure on equipment. Under certain circumstances, a relaxation to the vacuum range is necessary to achieve the desired cooling. In this case, there is an increased risk for the entry of oxygen into the system, especially in conjunction with existing in soot water chlorides
Spannungskorrosion an den eingesetzten Apparaten führen kann. Stress corrosion can lead to the equipment used.
Wird das im Syntheserohgas enthaltene Kohlenmonoxid in einem nachfolgenden Prozessschritt mit Wasser zu Wasserstoff und Kohlendioxid konvertiert, wird angestrebt, das Syntheserohgas bereits während der Wasserwäsche bzw. Quenchung mit einem Großteil oder der Gesamtmenge des im Konvertierungsschritt benötigen Wassers anzureichern, so dass nur eine geringe oder keine zusätzliche Dampfzugabe erforderlich ist. Da das Synthesegas umso weniger Wasser aufnehmen kann, je geringer die Temperatur des Waschwassers ist, ist eine niedrige Temperatur des aufbereiteten und zurückgeführten Wassers von weniger als 50°C sehr nachteilig. Zwar ist es bedingt möglich, das aufbereitete Wasser bei seiner Rückführung durch If the carbon monoxide contained in the synthesis crude gas is converted with water into hydrogen and carbon dioxide in a subsequent process step, it is endeavored to enrich the synthesis gas already during the water washing or quenching with a large part or the total amount of water required in the conversion step, so that only little or no additional steam addition is required. Since the synthesis gas can absorb less water, the lower the temperature of the wash water, a low temperature of the treated and recycled water of less than 50 ° C is very disadvantageous. Although it is conditionally possible, the treated water in its return by
Wärmeintegration anzuwärmen, allerdings ist dies stets mit einem erhöhten Heat integration, however, this is always with an increased
apparativen Aufwand und mit Exergieverlusten verbunden. equipment expense and associated with Exergieverlusten.
Zur Überwindung der beschriebenen Nachteile sind aus dem Stand der Technik verschiedene Vorschläge bekannt. So offenbart die deutsche Patenanmeldung To overcome the disadvantages described, various proposals are known from the prior art. Thus the German patent application discloses
DE1020100140493 ein Verfahren, bei dem die Feststoffe aus dem ungekühlten Rußwasser mit Hilfe von Hydrozyklonen abgetrennt werden, während die DE3537493 alternativ den Einsatz von unter Druck betriebenen Schwerkraft- oder Koaleszier- Abscheidern vorsieht. Vor allem wegen des zweifelhaften Abscheidegrads von Hydrozyklonen und dem erheblichen apparativen Aufwand, sind diese Verfahren allerdings wenig attraktiv. DE1020100140493 a process in which the solids are separated from the uncooled soot water by means of hydrocyclones, while DE 3537493 alternatively provides for the use of pressurized gravity or Koaleszier- separators. Especially because of the dubious degree of separation of Hydrocyclones and the considerable expenditure on equipment, however, these methods are not very attractive.
In einem weiteren, aus der deutschen Patenschrift DE102010062769 bekannten Verfahren wird Rußwasser ohne Druckabsenkung einem Hochdruckfiltersystem zugeführt, in dem neben Quenchwasser eine feststoffreiche Flüssigphase abgetrennt wird. Zur Entwässerung wird die feststoffreiche Flüssigphase anschließend durch Entspannung abgekühlt und drucklos einer herkömmlichen Filtereinrichtung zugeführt. Um das so zurückgewonnene Wasser ebenfalls als Quenchwasser nutzen zu können, muss es wieder auf Prozessdruck gepumpt werden. In a further process, known from the German patent DE102010062769, soot water is fed without pressure reduction to a high-pressure filter system in which quench water is separated off in addition to quench water, a liquid phase rich in solids. For dehydration, the solids-rich liquid phase is then cooled by expansion and fed without pressure to a conventional filter device. In order to be able to use the recovered water as quench water, it must be pumped back to process pressure.
Aufgabe der vorliegenden Erfindung ist es daher, ein Verfahren sowie eine Vorrichtung der gattungsgemäßen Art anzugeben, durch die es möglich ist, heiße, mit Ruß und Schlacke beladene Gasströme wirtschaftlicher abzukühlen und zu waschen, als dies nach dem Stand der Technik möglich ist. Object of the present invention is therefore to provide a method and an apparatus of the generic type, by which it is possible to cool hot, loaded with soot and slag gas streams economically and wash, as is possible in the prior art.
Diese Aufgabe wird verfahrensseitig erfindungsgemäß dadurch gelöst, dass der Filterkuchen weitgehend trocken mittels eines Pulsationsfilters gewonnen wird, der Teil des Hochdruckfiltersystems ist. According to the invention, this object is achieved in that the filter cake is obtained largely dry by means of a pulsation filter, which is part of the high-pressure filter system.
Zumindest die im Rußwasser enthaltenen Rußpartikel verfügen über ein hohes freies Porenvolumen, das in der Regel mit Wasser gefüllt ist, welches durch Filterung nicht zurückgewonnen werden kann und das daher auch noch als Teil des Filterkuchens vorliegt. Als weitgehend trocken soll der Filterkuchen daher gelten, wenn die At least the soot particles contained in the soot water have a high free pore volume, which is usually filled with water, which can not be recovered by filtering and therefore also exists as part of the filter cake. As largely dry the filter cake should therefore apply, if the
Oberflächen der Partikel, aus denen er gebildet ist, fühlbar trocken sind. Surfaces of the particles from which it is formed are tangibly dry.
Ein Verfahren zur Behandlung von Rußwasser unter Einsatz eines Pulsationsfilters ist beispielsweise aus der Patentschrift US8728328 bekannt, wobei das Rußwasser nach einer Entspannung bis ins Vakuum in einen Absetzbehälter eingeleitet wird, aus dem sog. Grauwasser abgezogen und drucklos dem Pulsationsfilter zugeführt wird. A method for the treatment of soot water using a pulsation filter is known for example from the patent US8728328, wherein the soot water is introduced into a settling tank after a decompression into vacuum, withdrawn from the so-called gray water and fed without pressure to the pulsation filter.
Im Unterschied hierzu ist erfindungsgemäß vorgesehen, den Pulsationsfilter mit einem deutlichen höheren Druck von mehr als 10bar(a) zu betreiben, so dass das erhaltene, weitgehend aus Wasser bestehende Filtrat auf einem entsprechend hohen In contrast to this, according to the invention, the pulsation filter is operated at a significantly higher pressure of more than 10 bar (a), so that the resulting filtrate, which largely consists of water, has a correspondingly high level
Druckniveau gewonnen wird. Das erhaltene Filtrat weist sinnvollerweise eine Reinheit auf, die seinen unmittelbaren Einsatz bei der Abkühlung oder Wäsche des heißen, mit Ruß beladenen Gasstroms erlaubt. Vorzugsweise wird das Rußwasser stromaufwärts des Pulsationsfilters bis auf unvermeidliche Leitungsverluste keiner Drosselung unterworfen, so dass das Filtrat das Hochdruckfiltersystem mit einem Druck verlässt, der im Wesentlichen dem Druck entspricht, mit dem das Rußwasser anfällt. Die Rückführung des Filtrats kann daher mit vergleichsweise geringem Energieaufwand durchgeführt werden. Pressure level is gained. The resulting filtrate usefully has a purity which allows its immediate use in the cooling or washing of the hot soot laden gas stream. Preferably, the soot water upstream of the pulsation filter is subjected to no throttling except for unavoidable line losses, so that the filtrate leaves the high-pressure filter system at a pressure substantially equal to the pressure at which the soot water is produced. The return of the filtrate can therefore be carried out with comparatively little expenditure of energy.
Der Einsatz moderner, aus temperaturbeständigen Kunststoffen oder Metall bestehender Filtermaterialien erlaubt derzeit den Betrieb von Pulsationsfiltern mit Temperaturen bis zu 240°C. Eine bevorzugte Ausgestaltung der Erfindung sieht vor, das Rußwasser mit einer Temperatur in den Pulsationsfilter einzuleiten, die sich in einem Bereich zwischen 100°C und der maximal zulässigen, über 100°C liegenden Betriebstemperatur des Pulsationsfilters befindet. Fällt das Rußwasser mit einer Temperatur unterhalb der maximal zulässigen Betriebstemperatur des Pulsationsfilters an, wird das Rußwasser vorzugsweise stromaufwärts des Pulsationsfilters bis auf unvermeidliche Leitungsverluste nicht abgekühlt, so dass das Filtrat das The use of modern, made of temperature-resistant plastics or metal existing filter materials currently allows the operation of pulsation filters with temperatures up to 240 ° C. A preferred embodiment of the invention provides to introduce the soot water at a temperature in the pulsation filter, which is in a range between 100 ° C and the maximum allowable, lying above 100 ° C operating temperature of the pulsation filter. If the soot water precipitates at a temperature below the maximum permissible operating temperature of the pulsation filter, the soot water, preferably upstream of the pulsation filter, is not cooled down to unavoidable line losses, so that the filtrate discharges
Hochdruckfiltersystem mit einer Temperatur verlässt, die im Wesentlichen der High-pressure filter system leaves with a temperature that is essentially the
Temperatur des Rußwassers entspricht. Durch den Verzicht auf eine Kühlung des Rußwassers verbleibt dessen Energie weitgehend im System; Exergieverluste sowie der Energiebedarf zur Anwärmung des zurückgeführten Filtrats werden minimiert. Temperature of the soot water corresponds. By dispensing with cooling of the soot water whose energy remains largely in the system; Exergy losses and the energy required to heat the recycled filtrate are minimized.
Das erfindungsgemäße Verfahren ist prinzipiell für die Abkühlung und/oder Wäsche beliebiger heißer, mit Ruß beladener Gasströme geeignet. Mit besonderem Vorzug kann es jedoch bei der Behandlung eines durch die Vergasung von festen oder flüssigen kohlenstoffhaltigen Einsatzstoffen erhaltenen Syntheserohgas eingesetzt werden. The process according to the invention is suitable in principle for the cooling and / or washing of any hot gas streams laden with soot. With particular preference, however, it can be used in the treatment of a synthesis gas obtained by the gasification of solid or liquid carbonaceous feedstocks.
Weiterhin betrifft die Erfindung eine Vorrichtung zur Abkühlung und/oder Wäsche eines heißen, mit Ruß beladenen Gasstroms in direktem Kontakt mit Wasser, mit einer Abkühleinrichtung und/oder einer Wasserwäsche sowie einem Hochdruckfiltersystem, dem eine als Rußwasser bezeichnete, in der Abkühleinrichtung und/oder der Furthermore, the invention relates to a device for cooling and / or scrubbing a hot, loaded with carbon black gas stream in direct contact with water, with a cooling device and / or a water scrubber and a high pressure filter system, referred to as soot water, in the cooling device and / or the
Wasserwäsche mit einer T emperatur von wenigstens 100°C und einem Druck von mehr als 10bar(a) anfallende Aufschlämmung zugeführt werden kann, um ein gegenüber dem Rußwasser im Feststoffgehalt reduziertes Filtrat zum Einsatz in der Abkühleinrichtung und/oder der Wasserwäsche sowie einen, die abgetrennten Water wash with a temperature of at least 100 ° C and a pressure of more than 10bar (a) resulting slurry can be supplied to a compared to the soot water in the solid content reduced filtrate for use in the Cooling device and / or the water wash and one, the separated
Feststoffe enthaltenden Filterkuchen zu gewinnen. To gain solids-containing filter cake.
Die gestellte Aufgabe wird vorrichtungsseitig erfindungsgemäß dadurch gelöst, dass das Hochdruckfiltersystem einen Pulsationsfilter umfasst, mit dem der Filterkuchen weitgehend trocken gewonnen werden kann. The object is achieved device-side according to the invention that the high-pressure filter system comprises a pulsation filter with which the filter cake can be recovered largely dry.
Der Pulsationsfilter ist zweckmäßigerweise mit einem Druckbehälter ausgeführt, in dem mehrere Filterelemente angeordnet sind, die entweder aus einem porösen Metall oder Kunststoff bestehen oder einen perforierten Träger aufweisen, über den ein Filtertuch aus einem hitzebeständigen Material gespannt ist. Je nach der Form der The pulsation filter is expediently designed with a pressure vessel in which a plurality of filter elements are arranged, which consist of either a porous metal or plastic or have a perforated carrier over which a filter cloth is stretched from a heat-resistant material. Depending on the shape of the
Filterelemente, die als Rohr oder ebene Platte ausgebildet sein können, unterscheidet der Fachmann Pulse Tube Filter und Pressure Leaf Filter. Filter elements that can be formed as a tube or flat plate, the expert distinguishes Pulse Tube Filter and Pressure Leaf Filter.
Der Druckbehälter ist derart ausgelegt, dass der Pulsationsfilter für einen Betriebsdruck ausgelegt ist, der höher als der Druck ist, mit dem das Rußwasser anfällt. The pressure vessel is designed such that the pulsation filter is designed for an operating pressure which is higher than the pressure at which the soot water is produced.
Zweckmäßigerweise bestehen die Filterelemente des Pulsationsfilters aus einem Material, das bis zu einer Temperatur beständig ist, die höher ist als die Temperatur, mit der das Rußwasser anfällt. Conveniently, the filter elements of the pulsation filter are made of a material which is resistant to a temperature which is higher than the temperature at which the soot water is obtained.
Vorteilhafterweise sind stromaufwärts des Pulsationsfilters keine Einrichtungen zur Entspannung und/oder Kühlung des Rußwassers angeordnet. Advantageously, no means for relaxation and / or cooling of the soot water are arranged upstream of the pulsation filter.
Im Folgenden soll die Erfindung anhand eines in der Figur 1 schematisch dargestellten Ausführungsbeispiels näher erläutert werden. In the following, the invention will be explained in more detail with reference to an exemplary embodiment shown schematically in FIG.
Die Figur 1 zeigt die Verwendung der Erfindung zur Abkühlung und Wäsche eines Syntheserohgases. FIG. 1 shows the use of the invention for cooling and scrubbing a synthesis raw gas.
Das in der Vergasungseinrichtung V beispielsweise aus einem kohlenstoffhaltigen Raffinerierückstand durch Partielle Oxidation erhaltene, Ruß und mineralische The soot and mineral obtained in the gasification device V, for example, from a carbon-containing refinery residue by partial oxidation
Komponenten enthaltene Syntheserohgas 1 wird mit einem Druck zwischen 30 bis 80bar(a) in die Quencheinrichtung Q eingeleitet, um ohne wesentlichen Druckverlust in direktem Kontakt mit Quenchwasser 2 bis zur Sättigungstemperatur von bis zu 240°C abgekühlt zu werden, wobei eine erste Aufschlämmung 3 anfällt, die Ruß und zu Schlacke erstarrte mineralische Komponenten enthält. Das abgekühlte Synthesis crude gas 1 contained components is introduced at a pressure between 30 to 80bar (a) in the quenching device Q, to without significant pressure loss in direct contact with quench water 2 to the saturation temperature of up to 240 ° C. to be cooled to produce a first slurry 3 containing carbon black and slag-solidified mineral components. The cooled
Syntheserohgas 4 wird anschließend einer Wäsche W unterzogen, wobei verbliebene Feststoffe etwa in einer Kombination aus Venturiwäscher und Waschkolonne mit Hilfe von Waschwasser 5 abgetrennt werden, so dass ein weitgehend feststofffreies Syntheserohgas 6 zur weiteren Behandlung (nicht dargestellt) abgezogen werden kann. Die in der Wäsche W anfallende zweite Ruß und Schlacke enthaltene Synthesis raw gas 4 is then subjected to a wash W, wherein remaining solids are separated off, for example, in a combination Venturi scrubber and wash column with the aid of wash water 5, so that a largely solids-free synthesis gas 6 for further treatment (not shown) can be deducted. The obtained in the laundry W second soot and slag contained
Aufschlämmung 7 wird mit der ersten Aufschlämmung 3 zum Rußwasser 8 zusammengeführt. Das Rußwasser 8, in dem die Feststoffe mit einem Massenanteil zwischen 1 und 3% vorliegen, wird ohne Abkühlung und Entspannung dem in der Hochdruckfiltereinrichtung H angeordneten Pulsationsfilter P zugeführt, dessen aus einem ausreichend hitzebeständigen Material bestehenden Filterelemente F in einem Druckbehälter D angeordnet sind. Der im Pulsationsfilter P erhältliche Filterkuchen 9 kann aufgrund seiner geringen Restfeuchte ohne einen zusätzlichen Slurry 7 is combined with the first slurry 3 to form soot water 8. The soot water 8, in which the solids are present in a mass fraction of between 1 and 3%, is supplied to the high-pressure filter device H arranged pulsation filter P without cooling and relaxation, whose consisting of a sufficiently heat-resistant material filter elements F are arranged in a pressure vessel D. Due to its low residual moisture, the filter cake 9 available in the pulsation filter P can be without an additional moisture content
Entwässerungsschritt durch Deponierung oder Verbrennen entsorgt werden. Das im Rußwasser 8 enthaltene Wasser verbleibt nahezu vollständig und mit nur geringfügig reduzierten Druck- und Temperaturwerten im Filtrat 10, das mit vergleichsweise geringem Energieeinsatz über die Pumpe C zurückgeführt wird, um nach Aufteilung in einen ersten 1 1 und einen zweiten Teilstrom 12 dem Quenchwasser 2 und dem Waschwasser 5 zugeführt zu werden. Drainage step may be disposed of by landfilling or incineration. The water contained in the soot 8 remains almost completely and with only slightly reduced pressure and temperature values in the filtrate 10, which is recycled with comparatively low energy input via the pump C, after splitting into a first 1 1 and a second partial stream 12 the quench water. 2 and the washing water 5 to be supplied.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018002651.6 | 2018-03-31 | ||
| DE102018002651.6A DE102018002651A1 (en) | 2018-03-31 | 2018-03-31 | Process and device for the treatment of soot water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019185199A1 true WO2019185199A1 (en) | 2019-10-03 |
Family
ID=65995665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2019/025072 Ceased WO2019185199A1 (en) | 2018-03-31 | 2019-03-19 | Method and device for processing soot water |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102018002651A1 (en) |
| WO (1) | WO2019185199A1 (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1922196A1 (en) * | 1968-05-06 | 1970-01-22 | Karchacev Jurij G | Pulsating thickening filter system |
| DE3537493A1 (en) | 1985-10-22 | 1987-04-23 | Uhde Gmbh | METHOD FOR TREATING QUENCH WATER |
| DE3605065A1 (en) * | 1986-02-18 | 1987-08-20 | Diessel Gmbh & Co | Separation apparatus |
| WO2008037588A1 (en) * | 2006-09-28 | 2008-04-03 | Basf Se | Process for separating off carbon black from a wastewater stream |
| DE102009034494A1 (en) * | 2009-07-22 | 2011-03-10 | Uhde Gmbh | Continuous soot water treatment |
| DE102010010493B3 (en) | 2010-03-06 | 2011-07-14 | Vacu-Isotec KG, 01454 | Thermal insulation system, preferably for buildings |
| DE102010040492A1 (en) * | 2010-09-09 | 2012-03-15 | Siemens Aktiengesellschaft | Recirculation of process water during the flow stream gasification under process pressure with pressure filtration unit |
| DE102010062769A1 (en) | 2010-12-09 | 2012-06-14 | Siemens Aktiengesellschaft | Soot water purification by means of continuous pressure filtration |
| US8728328B2 (en) | 2007-10-23 | 2014-05-20 | General Electric Company | Methods for removing suspended solids from a gasification process stream |
-
2018
- 2018-03-31 DE DE102018002651.6A patent/DE102018002651A1/en not_active Withdrawn
-
2019
- 2019-03-19 WO PCT/EP2019/025072 patent/WO2019185199A1/en not_active Ceased
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1922196A1 (en) * | 1968-05-06 | 1970-01-22 | Karchacev Jurij G | Pulsating thickening filter system |
| DE3537493A1 (en) | 1985-10-22 | 1987-04-23 | Uhde Gmbh | METHOD FOR TREATING QUENCH WATER |
| DE3605065A1 (en) * | 1986-02-18 | 1987-08-20 | Diessel Gmbh & Co | Separation apparatus |
| WO2008037588A1 (en) * | 2006-09-28 | 2008-04-03 | Basf Se | Process for separating off carbon black from a wastewater stream |
| US8728328B2 (en) | 2007-10-23 | 2014-05-20 | General Electric Company | Methods for removing suspended solids from a gasification process stream |
| DE102009034494A1 (en) * | 2009-07-22 | 2011-03-10 | Uhde Gmbh | Continuous soot water treatment |
| DE102010010493B3 (en) | 2010-03-06 | 2011-07-14 | Vacu-Isotec KG, 01454 | Thermal insulation system, preferably for buildings |
| DE102010040492A1 (en) * | 2010-09-09 | 2012-03-15 | Siemens Aktiengesellschaft | Recirculation of process water during the flow stream gasification under process pressure with pressure filtration unit |
| DE102010062769A1 (en) | 2010-12-09 | 2012-06-14 | Siemens Aktiengesellschaft | Soot water purification by means of continuous pressure filtration |
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|---|---|
| DE102018002651A1 (en) | 2019-10-02 |
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