WO2001028664A1 - Method for purifying waste gases containing organic compounds and dust particles - Google Patents

Method for purifying waste gases containing organic compounds and dust particles Download PDF

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Publication number
WO2001028664A1
WO2001028664A1 PCT/CH2000/000568 CH0000568W WO0128664A1 WO 2001028664 A1 WO2001028664 A1 WO 2001028664A1 CH 0000568 W CH0000568 W CH 0000568W WO 0128664 A1 WO0128664 A1 WO 0128664A1
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Prior art keywords
exhaust gas
sand
combustion chamber
heat exchanger
fed
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PCT/CH2000/000568
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German (de)
French (fr)
Inventor
Alois Mueller
Original Assignee
Kronospan Ag
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Publication date
Application filed by Kronospan Ag filed Critical Kronospan Ag
Priority to EP00967490A priority Critical patent/EP1222015A1/en
Priority to AU77675/00A priority patent/AU7767500A/en
Publication of WO2001028664A1 publication Critical patent/WO2001028664A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
    • F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator

Definitions

  • the present application relates to a method for purifying exhaust gases according to the preamble of claim 1.
  • one or more wet carbon filters are used. In this way, water-soluble substances in particular can be eliminated from the exhaust gas. This means that no emission limitation of all relevant components of the exhaust gas is achieved and additional cleaning components have to be used to achieve specified maximum emission values.
  • regenerative, thermal cleaning systems can be used for this, in which the pre-cleaned exhaust gas flows through a preheated honeycomb and heats up in the process.
  • the exhaust gases are then fed to a combustion chamber in which the temperature is raised to approximately 800 ° by supplying a separate energy source. At these temperatures, the organic components in the exhaust gas are decomposed, rendering them harmless.
  • the now heated exhaust gases flow through to Cooling down then follows a cold honeycomb body, which in turn is warmed up as a result.
  • the thermal energy stored in the honeycomb bodies is used by periodically reversing the direction of flow of the exhaust gas.
  • the object of the present invention was to find a method for cleaning exhaust gases from the production of wood panels, which can easily and reliably comply with the emission limit values in the exhaust gas without having the disadvantages described and can therefore be used as an independent device.
  • the exhaust gas is advantageously freed of both the solid particles and the organic substances in the required scope in a single process.
  • no external energy is advantageously required for the combustion process.
  • the admixture of sand ensures, among other things, that practically no deposits can form in the first heat exchanger and thus also the operating time or. the maintenance intervals can be increased.
  • Fig. 1 shows the schematic representation of the cleaning method according to the invention.
  • FIG. 1 schematically shows a preferred exemplary embodiment of the cleaning process according to the invention.
  • the exhaust gas 1 loaded with volatile organic compounds and wood dust particles, which originates from the manufacturing process, for example from chipboard, is fed to a first heat exchanger 2.
  • hot sand 3 is supplied to the exhaust gas 1. added.
  • the sand 3 has the task, among other things, of preventing deposits on the heat exchanger 2 and supplying heat to the exhaust gases, and thus ensuring trouble-free operation of the system over a long period of time.
  • This mixture 1 ' is fed to a combustion chamber 4 after exiting the heat exchanger 2.
  • the combustion chamber 4 is preferably designed as a fluidized bed combustion chamber and is at a temperature of 700 ° C to Operated 1000 ° C, preferably at about 800 ° C.
  • hot sand 3 is preferably fed to the exhaust gas stream 1 ′.
  • the organic compounds located in the exhaust gas stream 1 ' are thermally decomposed, i.e. the main components of the organic compounds oxidize to carbon dioxide and water vapor.
  • the exhaust gas 1 ′′ which is now practically freed from organic compounds is fed to a coarse separator 5, in which the sand 3 added to the exhaust gas stream 1 ′′ is separated from it, but advantageously remains in the circuit.
  • Combustion chamber 4 has been heated, is now, as previously shown, on the one hand supplied to the exhaust gas stream 1 in front of the first heat exchanger 2 and on the other hand to the exhaust gas stream 1 'in front of the combustion chamber 4. So that the sand 3 is kept in a practically closed circuit, and the heating of the sand 3 is advantageously carried out in the combustion chamber 4. Thus, the preferred temperature of the sand is approximately resp. achieved slightly below the temperature of the combustion chamber 4. Of course, other devices for adding additional sand or.
  • the heated exhaust gas 1 ''' which has been practically cleaned of organic compounds, is now passed through the first heat exchanger 2 passed through, where it serves as a heating medium for the supplied exhaust gas 1.
  • Part of the exhaust gas stream 1 ''' can be supplied to the exhaust gas 1' upstream of the combustion chamber 4, respectively. be recycled in order to ensure optimal combustion or To achieve oxidation in the combustion chamber 4.
  • the corresponding amount is determined using known methods and metered in via appropriate valves.
  • the exhaust gas l 1 ′′ After passing through the first heat exchanger 2, the exhaust gas l 1 ′′ is now fed to a deduster 6, in which the inert dust particles are separated from the exhaust gas stream.
  • dedusting devices such as, for example, gravity dedusting systems, centrifugal dedusting systems, electrical gas cleaning systems, fabric filters or wet separators can be used for this.
  • the dedusted exhaust gas 7 can now be fed to an additional purification stage 8, such as a DENOX stage for reducing the NOx, in order to subsequently be removed as clean gas 9 in accordance with the permissible limit values with regard to particles and gaseous compounds ,
  • This separate heat transfer medium 11 can, for example Heating of the production facilities or as process energy.
  • the proposed method according to the invention permits the reliable purification of exhaust gases which are contaminated with both volatile organic compounds and dust particles in a single, coherent method.
  • the devices for carrying out the method can be produced very simply and compactly and have a high level of operational reliability and long maintenance intervals.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention relates to a method for purifying waste gases (1) containing volatile organic compounds and dust particles, which accumulate, for example, in the production of wood panelling, such as particle boards. According to said method, sand (3) is mixed with the waste gas stream (1) before the latter is fed into a first heat exchanger (2) for heating the waste gas. The waste gas (1') mixed with sand (3) is subsequently supplied to a combustion chamber (4), in which the organic compounds are oxidised at approximate temperatures of preferably 800 °C. The waste gas (1''), from which the organic compounds have been separated, is subsequently fed into a primary separator (5), where the sand (3) is eliminated again and then flows through the first heat exchanger (2) for heating the supplied waste gas (1), before being fed to a dust separator (6), where the dust particles are removed from the waste gas.

Description

Verfahren zur Reinigung von mit organischen Verbindungen und Staubpartikeln beladenen AbgasenProcess for cleaning exhaust gases loaded with organic compounds and dust particles
Die vorliegende Anmeldung betrifft ein Verfahren zur Reinigung von Abgasen nach dem Oberbegriff von Anspruch 1.The present application relates to a method for purifying exhaust gases according to the preamble of claim 1.
Beispielsweise bei der Herstellung von Holzplatten, wie beispielsweise Spanplatten, OSB-Platten oder MDF-Platten, weisen die Abgase eine starke Beladung mit flüchtigen organischen Verbindungen und Holzstaub auf. Um nun eine Reduktion dieser Stoffe der zu erzielen, sind eine Reihe von Abgasreinigungssystemen bekannt .For example, in the production of wood panels, such as chipboard, OSB or MDF, the exhaust gases are heavily loaded with volatile organic compounds and wood dust. In order to achieve a reduction in these substances, a number of exhaust gas cleaning systems are known.
Bei einem bekannten ReinigungsSystem werden ein oder mehrere Nasskohlefilter eingesetzt. Damit können insbesondere wasserlösliche Stoffe aus dem Abgas ausgeschieden werden. Damit werden also keine Emissionsbegrenzung sämtlicher relevanter Komponenten des Abgases erreicht und es müssen weitere Reinigungskomponenten zur Erreichung von festgesetzten maximalen Emissionswerten eingesetzt werden.In a known cleaning system, one or more wet carbon filters are used. In this way, water-soluble substances in particular can be eliminated from the exhaust gas. This means that no emission limitation of all relevant components of the exhaust gas is achieved and additional cleaning components have to be used to achieve specified maximum emission values.
Hierfür können beispielsweise regenerative, thermische Reinigungssysteme eingesetzt werden, bei welchen das vorgereinigte Abgas eine vorgeheizte Wabe durchströmt und sich dabei erwärmt. Anschliessend werden die Abgase einer Brennkammer zugeführt, in welcher mittels Zuführung eines separten Energieträgers die Temperatur auf ca. 800° erhöht wird. Bei diesen Temperaturen werden die organischen Komponenten im Abgas zersetzt und damit unschädlich gemacht. Die nun erhitzten Abgase durchströmen zur Abkühlung nun nachfolgend einen kalten Wabenkörper, welcher seinerseits dadurch aufgewärmt wird. Durch periodische Umkehr der Durchstrδmungsrichtung des Abgases wird die in den Wabenkδrpern gespeicherte Wärmeenergie genutzt .For example, regenerative, thermal cleaning systems can be used for this, in which the pre-cleaned exhaust gas flows through a preheated honeycomb and heats up in the process. The exhaust gases are then fed to a combustion chamber in which the temperature is raised to approximately 800 ° by supplying a separate energy source. At these temperatures, the organic components in the exhaust gas are decomposed, rendering them harmless. The now heated exhaust gases flow through to Cooling down then follows a cold honeycomb body, which in turn is warmed up as a result. The thermal energy stored in the honeycomb bodies is used by periodically reversing the direction of flow of the exhaust gas.
Der Nachteil derartiger Systeme liegt darin, dass die Abgase vorgängig aufwendig vorgereinigt werden müssen, damit Ablagerungen in den Waben vermieden werden und benötigen eine nicht unbeträchtliche Menge von Fremdenergie durch den separaten Energieträger. Dieses System eignet sich deshalb eigentlich nur in Verbindung mit der Nutzung dieser Fremdenergie als Heizenergie, welches das aufwendige und teure System rechtfertigt.The disadvantage of such systems is that the exhaust gases have to be pre-cleaned beforehand, so that deposits in the honeycomb are avoided and require a not inconsiderable amount of external energy from the separate energy source. This system is therefore only suitable in connection with the use of this external energy as heating energy, which justifies the complex and expensive system.
Die Aufgabe der vorliegenden Erfindung lag nun darin, ein Verfahren zur Reinigung von Abgasen aus der Produktion von Holzplatten zu finden, welches einfach und zuverlässig die Emissionsgrenzwerte im Abgas einzuhalten vermag, ohne die geschilderten Nachteile aufzuweisen und damit als selbständige Vorrichtung eingesetzt werden kann.The object of the present invention was to find a method for cleaning exhaust gases from the production of wood panels, which can easily and reliably comply with the emission limit values in the exhaust gas without having the disadvantages described and can therefore be used as an independent device.
Diese Aufgabe wird erfindungsgemäss durch ein Verfahren mit den Merkmalen nach Anspruch 1 gelöst .According to the invention, this object is achieved by a method having the features of claim 1.
Weitere erfindungsgemässe Ausführungsformen ergeben sich aus den weiteren Ansprüche 2 bis 8.Further embodiments according to the invention result from the further claims 2 to 8.
Durch das erfindungsgemässe Verfahren wird vorteilhafterweise in einem einzigen Prozess das Abgas sowohl von den festen Partikeln wie auch von den organischen Stoffen im geforderten Rahmen befreit. Vorteilhafterweise wird dabei, ausser beim Startvorgang, keine Fremdenergie für den Verbrennungsprozess benötigt. Durch die Beimischung von Sand wird unter anderem erreicht, dass im ersten Wärmetauscher praktisch keine Ablagerungen entstehen können und damit auch die Betriebsdauer resp. die Wartungsintervalle erhöht werden können.By means of the method according to the invention, the exhaust gas is advantageously freed of both the solid particles and the organic substances in the required scope in a single process. With the exception of the starting process, no external energy is advantageously required for the combustion process. The admixture of sand ensures, among other things, that practically no deposits can form in the first heat exchanger and thus also the operating time or. the maintenance intervals can be increased.
Ein Ausführungsbeispiel der vorliegenden Erfindung wird nachstehend anhand der einzigen Figur noch näher erläutert. Es zeigtAn embodiment of the present invention is explained in more detail below with reference to the single figure. It shows
Fig. 1 die schematische Darstellung des erfindungsgemässen Reinigungsverfahrens .Fig. 1 shows the schematic representation of the cleaning method according to the invention.
In Figur 1 ist schematisch ein bevorzugtes Ausführungsbeispiel des erfindungsgemässen Reinigungsprozess dargestellt. Das mit flüchtigen organischen Verbindungen und Holzstaubpartikeln beladene Abgas 1, welches vom Herstellungsprozess beispielsweise von Holzspanplatten herrührt, wird einem ersten Wärmetauscher 2 zugeführt . Vor dem Eintritt in den Wärmetauscher 2 wird dem Abgas 1 heisser Sand 3 zugeführt resp. beigemischt. Der Sand 3 hat dabei unter anderem die Aufgabe, Ablagerungen am Wärmetauscher 2 zu verhindern und den Abgasen Wärme zuzuführen, und damit einen störungsfreien Betrieb der Anlage über einen grossen Zeitraum zu gewährleisten.FIG. 1 schematically shows a preferred exemplary embodiment of the cleaning process according to the invention. The exhaust gas 1 loaded with volatile organic compounds and wood dust particles, which originates from the manufacturing process, for example from chipboard, is fed to a first heat exchanger 2. Before entering the heat exchanger 2, hot sand 3 is supplied to the exhaust gas 1. added. The sand 3 has the task, among other things, of preventing deposits on the heat exchanger 2 and supplying heat to the exhaust gases, and thus ensuring trouble-free operation of the system over a long period of time.
Dieses Gemisch 1 ' wird nach dem Austritt aus dem Wärmetauscher 2 einer Brennkammer 4 zugeführt . Die Brennkammer 4 ist vorzugsweise als Wirbelschichtbrennkammer ausgeführt und wird bei einer Temperatur von 700° C bis 1000° C betrieben, vorzugsweise bei ca. 800° C. Vor dem Eintritt resp. beim Eintritt in diese Brennkammer 4 wird dem Abgasstrom 1 ' vorzugsweise weiter heisser Sand 3 zugeführt .This mixture 1 'is fed to a combustion chamber 4 after exiting the heat exchanger 2. The combustion chamber 4 is preferably designed as a fluidized bed combustion chamber and is at a temperature of 700 ° C to Operated 1000 ° C, preferably at about 800 ° C. Before entering or. when entering this combustion chamber 4, hot sand 3 is preferably fed to the exhaust gas stream 1 ′.
In der Brennkammer 4 werden die im Abgasstrom 1 ' befindlichen organischen Verbindungen thermisch zersetzt, d.h. die Hauptbestandteile der organischen Verbindungen oxydieren zu Kohlendioxid und Wasserdampf. Das nun praktisch von organischen Verbindungen befreite Abgas 1' ' wird einem Grobabscheider 5 zugeführt, in welchem der dem Abgasstrom 1 ' ' beigemischte Sand 3 von diesem abgeschieden wird, dabei aber vorteilhafterweise im Kreislauf verbleibt.In the combustion chamber 4, the organic compounds located in the exhaust gas stream 1 'are thermally decomposed, i.e. the main components of the organic compounds oxidize to carbon dioxide and water vapor. The exhaust gas 1 ″ which is now practically freed from organic compounds is fed to a coarse separator 5, in which the sand 3 added to the exhaust gas stream 1 ″ is separated from it, but advantageously remains in the circuit.
Der abgeschiedene Sand 3, welcher nach Durchlauf derThe separated sand 3, which after passing through the
Brennkammer 4 erhitzt worden ist, wird nun, wie vorgängig dargestellt, einerseits dem Abgasstrom 1 vor dem ersten Wärmetauscher 2 zugeführt und andererseits dem Abgasstrom 1 ' vor der Brennkammer 4 zugeführt . Damit wird der Sand 3 in einem praktisch geschlossenen Kreislauf gehalten, und die Erwärmung des Sandes 3 erfolgt vorteilhafterweise in der Brennkammer 4. Damit wird die bevorzugte Temperatur des Sandes annähernd resp. leicht unter der Temperatur der Brennkammer 4 erzielt. Selbstverständlich können weitere Vorrichtung zum Beimischen von zusätzlichem Sand resp.Combustion chamber 4 has been heated, is now, as previously shown, on the one hand supplied to the exhaust gas stream 1 in front of the first heat exchanger 2 and on the other hand to the exhaust gas stream 1 'in front of the combustion chamber 4. So that the sand 3 is kept in a practically closed circuit, and the heating of the sand 3 is advantageously carried out in the combustion chamber 4. Thus, the preferred temperature of the sand is approximately resp. achieved slightly below the temperature of the combustion chamber 4. Of course, other devices for adding additional sand or.
Abzweigen von überschüssigem Sand vorhanden sein, welche in diesem Schema nicht dargestellt sind, damit die Sandmenge dem Volumenstrom des Abgases angepasst werden kann.There may be branches of excess sand, which are not shown in this diagram, so that the amount of sand can be adapted to the volume flow of the exhaust gas.
Das von organischen Verbindungen praktisch gereinigte, erhitzte Abgas 1 ' ' ' wird nun durch den ersten Wärmetauscher 2 hindurchgeführt, wo es als Heizmittel für das zugeführte Abgas 1 dient . Ein Teil des Abgasstromes 1 ' ' ' kann dem Abgas 1' vor der Brennkammer 4 zugeführt, resp. rückgeführt werden, um eine optimale Verbrennung resp. Oxidation in der Brennkammer 4 zu erreichen. Die entsprechende Menge wird dabei nach bekannten Verfahren ermittelt und über entsprechende Ventile dosiert zugeführt.The heated exhaust gas 1 ''', which has been practically cleaned of organic compounds, is now passed through the first heat exchanger 2 passed through, where it serves as a heating medium for the supplied exhaust gas 1. Part of the exhaust gas stream 1 '''can be supplied to the exhaust gas 1' upstream of the combustion chamber 4, respectively. be recycled in order to ensure optimal combustion or To achieve oxidation in the combustion chamber 4. The corresponding amount is determined using known methods and metered in via appropriate valves.
Nach dem Durchlaufen des ersten Wärmetauschers 2 wird das Abgas l1 ' ' nun einem Entstauber 6 zugeführt, in welchem die inerten Staubpartikel aus dem Abgasstrom ausgeschieden werden. Hierfür können bekannte Entstaubungsvorrichtungen wie beispielsweise Schwerkraft-Entstaubungsanlagen, Fliehkraft-Entstaubungsanlagen, elektrische Gasreinigungsanlagen, Gewebefilter oder Nassabscheider eingesetzt werden.After passing through the first heat exchanger 2, the exhaust gas l 1 ″ is now fed to a deduster 6, in which the inert dust particles are separated from the exhaust gas stream. Known dedusting devices such as, for example, gravity dedusting systems, centrifugal dedusting systems, electrical gas cleaning systems, fabric filters or wet separators can be used for this.
Im Anschluss an den Entstauber 6 kann nun das entstaubte Abgas 7 bei Bedarf einer zusätzlichen Reinigungsstufe 8, wie beispielsweise einer DENOX-Stufe zur Reduktion des NOx zugeführt, um anschliessend als Reingas 9 entsprechend den zulässigen Grenzwerten in Bezug auf Teilchen und gasförmigen Verbindungen abgeführt zu werden.Following the deduster 6, the dedusted exhaust gas 7 can now be fed to an additional purification stage 8, such as a DENOX stage for reducing the NOx, in order to subsequently be removed as clean gas 9 in accordance with the permissible limit values with regard to particles and gaseous compounds ,
Vorzugsweise wird nun dieses Reingas 9, welches immer noch eine verhältnismässig hohe Temperatur aufweist, durch einen zweiten Wärmetauscher 10 hindurchgeführt, um unter Aufheizung eines separaten Wärmeträgers 11 abzukühlen und anschliessend über einen Kamin 12 ins Freie zu gelangen. Dieser separate Wärmeträger 11 kann beispielsweise zur Heizung der Produktionsstätten oder als Prozessenergie genutzt werden.This clean gas 9, which is still at a relatively high temperature, is preferably passed through a second heat exchanger 10 in order to cool down while heating a separate heat transfer medium 11 and then to get outside through a chimney 12. This separate heat transfer medium 11 can, for example Heating of the production facilities or as process energy.
Das vorgeschlagene, erfindungsgemässe Verfahren erlaubt die zuverlässige Reinigung von Abgasen, welche sowohl mit flüchtige organische Verbindungen wie auch Staubpartikel belastet sind, in einem einzigen, zusammenhängenden Verfahren. Die Vorrichtungen zu Durchführung des Verfahrens lassen sich sehr einfach und kompakt erstellen und weisen eine hohe Betriebssicherheit und lange Wartungsintervalle auf. The proposed method according to the invention permits the reliable purification of exhaust gases which are contaminated with both volatile organic compounds and dust particles in a single, coherent method. The devices for carrying out the method can be produced very simply and compactly and have a high level of operational reliability and long maintenance intervals.

Claims

Patentansprüche claims
1. Verfahren zur Reinigung von durch flüchtige organische Verbindungen und Staubpartikeln belasteten Abgasen, dadurch gekennzeichnet, dass1. A method for cleaning exhaust gases contaminated by volatile organic compounds and dust particles, characterized in that
- die Abgase (1) zuerst einem ersten Wärmetauscher (2) zugeführt werden, in welchem dem Abgasstrom (1) Sand (3) zugemischt wird und die Temperatur erhöht wird,- The exhaust gases (1) are first fed to a first heat exchanger (2), in which sand (3) is added to the exhaust gas stream (1) and the temperature is increased,
- anschliessend die Abgase (l1) zusammen mit dem beigefügten Sand (3) einer Brennkammer (4) zugeführt werden, wo vor oder bei deren Eintritt eine weitere Zumischung von Sand (3) erfolgt und während des- Then the exhaust gases (l 1 ) are fed together with the sand (3) to a combustion chamber (4) where, before or when they enter, a further admixture of sand (3) takes place and during the
Verbrennungsprozesses eine Temperatur eingestellt wird, bei welcher die organischen Komponenten im Abgas oxidiert werden, undCombustion process is set a temperature at which the organic components in the exhaust gas are oxidized, and
- anschliessend der Abgasstromes (l11) einem Grobabscheider- then the exhaust gas flow (l 11 ) a coarse separator
(5) zugeführt wird, in welchem der beigemischte Sand (3) wieder ausgeschieden wird und anschliessend ein Teil des Abgasstromes (l111) in die Brennkammer (4) zurückgeführt wird und der restliche Teil des Abgasstromes (l'1') dem Wärmetauscher (2) zur Aufheizung des Abgasstromes (1) zugeführt wird, und anschliessend(5) is fed, in which the admixed sand (3) is separated out again and then part of the exhaust gas stream (l 111 ) is returned to the combustion chamber (4) and the remaining part of the exhaust gas stream (l ' 1 ') to the heat exchanger ( 2) is supplied to heat the exhaust gas stream (1), and then
- der Abgasstrom (l1 ' ') entstaubt wird und abgeführt wird.- The exhaust gas flow (l 1 '') is dedusted and discharged.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass nach der Entstaubung (6) weitere Reinigungsstufen (8) , wie beispielsweise zur Reduktion von NOx, eingeschaltet werden.2. The method according to claim 1, characterized in that after the dedusting (6) further cleaning stages (8), such as for reducing NOx.
3. Verfahren nach Anspruch 1 oder 2 , dadurch gekennzeichnet, dass der Abgasstrom (9) vor der Abführung an die Umgebung einem weiteren Wärmetauscher (10) zugeführt wird.3. The method according to claim 1 or 2, characterized in that the exhaust gas stream (9) is fed to a further heat exchanger (10) before being discharged to the environment.
4. Verfahren nach Anspruch 3 , dadurch gekennzeichnet, dass der weitere Wärmetauscher (10) von einem separaten4. The method according to claim 3, characterized in that the further heat exchanger (10) from a separate
Wärmeträger (11) durchströmt wird.Is flowed through heat transfer medium (11).
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Brennkammer (4) als Wirbelschichtbrennkammer betrieben wird.5. The method according to any one of claims 1 to 4, characterized in that the combustion chamber (4) is operated as a fluidized bed combustion chamber.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Brennkammer (4) mit einer Temperatur zwischen 700° C und 1000° C, vorzugsweise von ca. 800°C, betrieben wird.6. The method according to any one of claims 1 to 5, characterized in that the combustion chamber (4) is operated at a temperature between 700 ° C and 1000 ° C, preferably of about 800 ° C.
7. Verfahren nach einem der Ansprüche 1 bis 6 , dadurch gekennzeichnet, dass der Sand (3) vor der Zuführung in den Wärmetauscher (2) erwärmt wird, vorzugsweise auf eine Temperatur bis maximal der Temperatur der Brennkammer (4) .7. The method according to any one of claims 1 to 6, characterized in that the sand (3) is heated before being fed into the heat exchanger (2), preferably to a temperature up to a maximum of the temperature of the combustion chamber (4).
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Sand (3) in einem geschlossenen Kreislauf geführt wird, d.h. nach dem Grobabscheider (5) wieder dem Wärmetauscher (2) resp. der Brennkammer (4) zugeführt wird. 8. The method according to any one of claims 1 to 7, characterized in that the sand (3) is guided in a closed circuit, i.e. after the coarse separator (5) again the heat exchanger (2) resp. the combustion chamber (4) is supplied.
PCT/CH2000/000568 1999-10-21 2000-10-20 Method for purifying waste gases containing organic compounds and dust particles WO2001028664A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00967490A EP1222015A1 (en) 1999-10-21 2000-10-20 Method for purifying waste gases containing organic compounds and dust particles
AU77675/00A AU7767500A (en) 1999-10-21 2000-10-20 Method for purifying waste gases containing organic compounds and dust particles

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CH192199 1999-10-21
CH1921/99 1999-10-21

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WO2001028664A1 true WO2001028664A1 (en) 2001-04-26

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PCT/CH2000/000568 WO2001028664A1 (en) 1999-10-21 2000-10-20 Method for purifying waste gases containing organic compounds and dust particles

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109621676A (en) * 2018-12-27 2019-04-16 麻城市中优顺建材科技有限公司 A kind of exhaust treatment system that can recycle methyl methacrylate

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US4741690A (en) * 1984-06-21 1988-05-03 Heed Bjoern Process for combustion or decomposition of pollutants and equipment therefor
EP0401810A1 (en) * 1989-06-08 1990-12-12 Nukem GmbH Process for the chemical-thermal destruction of halogenated hydrocarbons
US5664942A (en) * 1994-10-25 1997-09-09 Abb Air Preheater, Inc. Regenerative thermal oxidizer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4741690A (en) * 1984-06-21 1988-05-03 Heed Bjoern Process for combustion or decomposition of pollutants and equipment therefor
EP0401810A1 (en) * 1989-06-08 1990-12-12 Nukem GmbH Process for the chemical-thermal destruction of halogenated hydrocarbons
US5664942A (en) * 1994-10-25 1997-09-09 Abb Air Preheater, Inc. Regenerative thermal oxidizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109621676A (en) * 2018-12-27 2019-04-16 麻城市中优顺建材科技有限公司 A kind of exhaust treatment system that can recycle methyl methacrylate

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EP1222015A1 (en) 2002-07-17

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