EP0661367A1 - Process for treating waste - Google Patents
Process for treating waste Download PDFInfo
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- EP0661367A1 EP0661367A1 EP94890218A EP94890218A EP0661367A1 EP 0661367 A1 EP0661367 A1 EP 0661367A1 EP 94890218 A EP94890218 A EP 94890218A EP 94890218 A EP94890218 A EP 94890218A EP 0661367 A1 EP0661367 A1 EP 0661367A1
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- fermentation process
- biological
- rotting
- annealing treatment
- subjected
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
Definitions
- the invention relates to a method for treating residual waste, in which the light fraction is implemented by thermal methods and the heavy fraction is subjected to a biological rotting or fermentation process.
- Residual waste usually comes from municipal, commercial or industrial waste and arises after the previous collection and recycling of all material and biological components in the waste. These substances are collected using the well-known, different methods and used for material or biological recycling. The remaining remainder as well as the remnants from the treatment plants for material and biological recycling form the residual waste.
- the composition of the residual waste to be treated is similar to that of mixed household waste, but has a lower content of organic substances, but an increased content of plastic waste.
- a method of the type mentioned at the outset is now known, in which there is the possibility of combining the two methods, namely the so-called “residual waste splitting method”.
- a fuel with a high proportion of ignition loss is mechanically separated and subjected to a targeted thermal utilization by means of light fraction incineration plants or light fraction pyrolysis plants.
- the remaining heavy fraction is subjected to a biological rotting or fermentation process, optionally with the addition of sewage sludge.
- the end product obtained there does not meet the requirements of the "Technical instructions for municipal waste" with regard to the maximum loss on ignition of the dry matter.
- the invention is therefore based on the object of providing a method of the type mentioned at the outset with which the prescribed parameters for the remaining constituents to be deposited are achieved.
- this object is achieved in that the material coming from the biological rotting or fermentation process of the heavy fraction is subjected to an annealing treatment, preferably at a temperature of approximately 1600 ° C.
- an annealing treatment preferably at a temperature of approximately 1600 ° C.
- the product is converted into a melt state and has a glass-like character at the outlet of the corresponding furnace. Landfilling is easily possible according to all current regulations.
- the material coming from the biological rotting or fermentation process can be freed of the remaining light materials by air separation prior to the annealing treatment.
- This has the advantage that those substances which are not necessarily to be subjected to the annealing treatment, since they can be used elsewhere, do not burden the annealing process and thus the energy balance.
- the light substances separated by wind sifting can be added to the light fraction prior to their thermal utilization, whereby the energy content contained in the light substances can be used particularly well.
- the exhaust gases resulting from the annealing treatment can, if necessary, Cleaning, be introduced into the biological rotting or fermentation process, whereby the resulting exhaust gases are processed accordingly in the biological treatment plant, so that pollution of the environment by these exhaust gases is eliminated.
- the gases introduced to cool the annealing material at the end of the annealing treatment can be used at the beginning of the annealing treatment to heat the material to be annealed.
- the gases emerging from this after heating the material to be glowed can be dewatered, the resulting wastewater being fed to the biological rotting or fermentation process.
- FIG. 2 shows a quantity flow diagram with regard to the recycling of residual waste.
- FIG. 3 shows a basic diagram of the annealing treatment step.
- the residual waste is separated into a light fraction and a heavy fraction in a mechanical processing plant, in which hazardous waste and valuable materials are separated.
- the light fraction which can be used thermally, is fed to a special incinerator.
- the high loss on ignition is used as an energy source and the carbon is burned to carbon dioxide.
- the light fraction has a high calorific value and has an essentially constant composition, which enables the operation of ecologically sensible and economically favorable combustion plants, for example according to the principle of the circulating fluidized bed.
- the heavy fraction coming from the mechanical treatment plant is sent to a biological treatment, where appropriate sewage sludge can be added.
- the biological treatment is a rotting or fermentation process.
- this biological treatment plant now follows that the material coming from this biological rotting is further processed after it has been separated into a light and heavy fraction by sieving and air separation.
- the light fraction obtained is mixed with the light fraction, which comes directly from the mechanical processing plant of the residual waste, and burned there.
- the fraction falling through the sieve or the heavy fraction coming from the air classifier is subjected to an afterglow step.
- the product is screened through a sieve with a preferred mesh size of 15 mm.
- the afterglow is carried out in a special tunnel furnace, but it is a prerequisite that the water content of the material emerging in the biological treatment stage is reduced to approximately 20% by weight and that the maximum possible removal of all light materials is achieved by the air classifier.
- the tunnel kiln is preferably heated by means of electrical resistance heating elements in order to avoid an open flame in the kiln and thereby reduce the risk of fire.
- the material to be treated is heated to a temperature of around 1600 ° C in this tunnel oven.
- a glass-like product is then created, which after appropriate cooling can be deposited in any case.
- the tunnel furnace is designated by 1 in Fig. 3 and has a resistance heating element 2 for annealing the material.
- the tunnel kiln 1 is loaded via a conveyor belt 3, which places the material via a hopper 4 on the conveyor belt 5 leading through the kiln.
- the product is then thrown off this conveyor belt 5 at 6 and fed to a landfill.
- the kiln 1 has a heating zone 7 and a cooling zone 8, which is achieved by a targeted air flow.
- the product is annealed between these zones.
- a pump 9 the cooling air is introduced at the end of the cooling zone 8 at the bottom of the furnace, passes through the materials to be cooled and is led out of the furnace at 10 at the upper end.
- the line 10 then leads into the central region of the heating zone 7, as a result of which the material introduced into the kiln 1 is heated.
- the warming-up gas led out of the kiln via line 11 is passed through a heat exchanger 12 which is cooled via a fresh water line 13.
- the cooled gas emerging from the heat exchanger 12, which is mixed with condensate, is fed via a line 14 to a separator 15, the cooled air being introduced via line 16 into the cooling zone of the kiln 1, etc. in the direction of the product flow in front of the line coming from the pump 9.
- the cooling air is heated by the annealed material and exits the cooling zone of the kiln via line 17 and, after the line 10 flows into the kiln 1, etc.
- the cleaning station 25 consists of two washing stages 26, 27, in which the pollutants entrained in the exhaust gas are washed out or neutralized. The first washing stage works in the acidic area and the second washing stage in the basic area.
- the pollutants in the exhaust gas are thereby neutralized and excreted in the wash water treatment system 25 as solids (REA products). These solids should be sent to a hazardous waste landfill.
- the exhaust gases coming from the washing system 25 are cleaned again via an activated carbon filter 28 in order to separate any special organic pollutants that may also be present.
- By means of a pump 29, these exhaust gases are discharged through a Line 30 fed to a rotting plant 31, etc. the biological treatment plant of the heavy fraction of the residual waste fraction coming from the mechanical treatment plant.
- Exhaust gases emerging from this decomposition system 31 are fed to a bio-washing system 33 via a pump 32 and then discharged into the atmosphere via line 34.
- the condensate coming from the separators 15 and 23, as well as the fresh water emerging from the heat exchanger 12, is fed via lines 35 and 36 into the rotting plant 31 in order to control the moisture balance there and also to break down any pollutant particles that have been carried along.
- the quantity flow diagram shown in FIG. 2 shows in another form the flow diagram according to FIG. 1, but with the addition of the substrate quantities carried in the individual branches.
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- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Removal Of Specific Substances (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Behandlung von Restmüll, bei welchem die Leichtfraktion durch thermische Verfahren umgesetzt und die Schwerfraktion einem biologischen Rotte- oder Vergärungsprozeß unterworfen wird.The invention relates to a method for treating residual waste, in which the light fraction is implemented by thermal methods and the heavy fraction is subjected to a biological rotting or fermentation process.
Restmüll stammt üblicherweise aus kommunalen, gewerblichen oder industriellen Abfällen und entsteht nach der vorherigen Sammlung und Verwertung aller stofflichen und biologischen Anteile im Abfall. Diese Stoffe werden mit den bekannten, untereinander verschiedenen Methoden gesammelt und einer stofflichen oder biologischen Verwertung zugeführt. Der verbleibende Rest sowie die Reste aus den Behandlungsanlagen der stofflichen und biologischen Verwertung bilden den Restmüll. Der zu behandelnde Restmüll ist in seiner Zusammensetzung ähnlich dem gemischten Hausmüll, weist jedoch einen geringeren Gehalt an organischen Stoffen, jedoch einen erhöhten Gehalt an Kunststoffabfällen auf.Residual waste usually comes from municipal, commercial or industrial waste and arises after the previous collection and recycling of all material and biological components in the waste. These substances are collected using the well-known, different methods and used for material or biological recycling. The remaining remainder as well as the remnants from the treatment plants for material and biological recycling form the residual waste. The composition of the residual waste to be treated is similar to that of mixed household waste, but has a lower content of organic substances, but an increased content of plastic waste.
Die deutsche Verwaltungsvorschrift "Technische Anleitung Siedlungsabfall" sowie ähnliche Vorschriften in anderen Ländern schreiben vor, daß die nach der Behandlung des Restmülls anfallenden, zu vergrabenden Rückstände nur mehr erdkrustenähnliche Stoffe sein dürfen, wobei der wesentliche Parameter für die zukünftige Deponierung dieser Bestandteile der Glühverlust ist, der nicht mehr als 5 Gew.- % der Trockensubstanz betragen darf. Um der genannten deutschen Verwaltungsvorschrift nachzukommen, muß der Restmüll entsprechend aufgearbeitet werden. Dafür sind grundsätzlich verschiedene Verfahren bekannt, wobei die wesentlichsten Verfahren nach der Reaktionszeit zu unterscheiden sind:
- a) Thermische Verfahren, d.s. Verbrennung, Vergasung oder Pyrolyse bringen eine kurze Umsetzdauer;
- b) Biologische Verfahren, d.s. Verrottung oder Vergärung, benötigen eine lange Umsetzdauer.
- a) Thermal processes, ie combustion, gasification or pyrolysis result in a short reaction time;
- b) Biological processes, such as rotting or fermentation, require a long reaction time.
Jedes der genannten Verfahren hat jedoch Nachteile, wobei die thermischen Verfahren nur unter Zugrundelegung von langen Genehmigungs- und Bauzeiträumen zu realisieren sind, die biologischen Verfahren hingegen nicht die zukünftig notwendigen Parameter der Deponierung erreichen lassen.However, each of the methods mentioned has disadvantages, the thermal methods only using long approval and construction periods are to be realized, however, the biological processes do not allow the landfill parameters to be achieved in the future.
Es ist nun ein Verfahren der eingangs genannten Art bekannt, bei welchem die Möglichkeit der Kombination beider Verfahrenswege gegeben ist, nämlich das sogenannte "Restmüll-Splittingverfahren". Bei diesem Verfahren wird ein Brennstoff mit hohem Anteil von Glühverlust mechanisch abgeschieden und einer gezielten thermischen Verwertung mittels Leichtfraktionsverbrennungsanlagen oder Leichtfraktionspyrolysenanlagen zugeführt. Die verbleibende Schwerfraktion wird, gegebenenfalls unter Zumischung von Klärschlamm, einem biologischen Rotte- oder Vergärungsprozeß unterzogen. Das dort anfallende Endprodukt erfüllt jedoch nicht die Anforderung der "Technischen Anleitung Siedungsabfall" bezüglich des maximalen Glühverlustes der Trockensubstanz.A method of the type mentioned at the outset is now known, in which there is the possibility of combining the two methods, namely the so-called “residual waste splitting method”. In this process, a fuel with a high proportion of ignition loss is mechanically separated and subjected to a targeted thermal utilization by means of light fraction incineration plants or light fraction pyrolysis plants. The remaining heavy fraction is subjected to a biological rotting or fermentation process, optionally with the addition of sewage sludge. However, the end product obtained there does not meet the requirements of the "Technical instructions for municipal waste" with regard to the maximum loss on ignition of the dry matter.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, mit welchem die verordneten Parameter für die zu deponierenden Restbestandteile erzielt werden.The invention is therefore based on the object of providing a method of the type mentioned at the outset with which the prescribed parameters for the remaining constituents to be deposited are achieved.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß das von dem biologischen Rotte- oder Vergärungsprozeß kommende Material der Schwerfraktion einer Glühbehandlung, vorzugsweise bei einer Temperatur von etwa 1600°C, unterworfen wird. Dadurch wird das Produkt in einen Schmelzzustand übergeführt und hat am Ausgang des entsprechenden Ofens glasartigen Charakter. Eine Deponierung ist nach allen derzeitigen Vorschriften problemlos möglich.According to the invention, this object is achieved in that the material coming from the biological rotting or fermentation process of the heavy fraction is subjected to an annealing treatment, preferably at a temperature of approximately 1600 ° C. As a result, the product is converted into a melt state and has a glass-like character at the outlet of the corresponding furnace. Landfilling is easily possible according to all current regulations.
Vorteilhafterweise kann das von dem biologischen Rotte- oder Vergärungsprozeß kommende Material vor der Glühbehandlung durch Windsichtung von den verbliebenen Leichtstoffen befreit werden. Dies hat den Vorteil, daß jene Substanzen, welche nicht unbedingt der Glühbehandlung zu unterwerfen sind, da sind anderweitig verwendbar sind, den Glühprozeß und damit die Energiebilanz nicht belasten. Dabei können die durch Windsichtung abgetrennten Leichtstoffe der Leichtfraktion vor deren thermischen Verwertung zugesetzt werden, wodurch der in den Leichtstoffen enthaltene Energieinhalt besonders gut ausgenützt werden kann. Die bei der Glühbehandlung anfallenden Abgase können, gegebenenfalls nach Reinigung, in den biologischen Rotte- oder Vergärungsprozeß eingeführt werden, wodurch die anfallenden Abgase in der biologischen Behandlungsanlage entsprechend aufgearbeitet werden, sodaß eine Belastung der Umwelt durch diese Abgase ausgeschaltet ist. Zur Verbesserung der Energiebilanz und zur besseren Ausnützung der Gase können die zur Kühlung des Glühgutes am Ende der Glühbehandlung eingebrachten Gase am Beginn der Glühbehandlung zur Anwärmung des zu glühenden Gutes eingesetzt werden.Advantageously, the material coming from the biological rotting or fermentation process can be freed of the remaining light materials by air separation prior to the annealing treatment. This has the advantage that those substances which are not necessarily to be subjected to the annealing treatment, since they can be used elsewhere, do not burden the annealing process and thus the energy balance. The light substances separated by wind sifting can be added to the light fraction prior to their thermal utilization, whereby the energy content contained in the light substances can be used particularly well. The exhaust gases resulting from the annealing treatment can, if necessary, Cleaning, be introduced into the biological rotting or fermentation process, whereby the resulting exhaust gases are processed accordingly in the biological treatment plant, so that pollution of the environment by these exhaust gases is eliminated. To improve the energy balance and to make better use of the gases, the gases introduced to cool the annealing material at the end of the annealing treatment can be used at the beginning of the annealing treatment to heat the material to be annealed.
Schließlich können die nach Anwärmung des zu glühenden Gutes aus diesem austretenden Gase entwässert werden, wobei die anfallenden Abwässer dem biologischen Rotte- oder Vergärungsprozeß zugeführt werden. Damit wird eine weitere Reinigung der Abwässer erreicht, da diese in den biologischen Rotte- oder Vergärungsprozeß einerseits die benötigte Feuchtigkeit einbringen und anderseits die in ihnen enthaltenen, von den Mikroorganismen verarbeitbaren Substanzen abgebaut werden.Finally, the gases emerging from this after heating the material to be glowed can be dewatered, the resulting wastewater being fed to the biological rotting or fermentation process. This results in a further purification of the waste water, since on the one hand it introduces the required moisture into the biological rotting or fermentation process and on the other hand the substances contained in it, which can be processed by the microorganisms, are broken down.
Das erfindungsgemäße Verfahren wird nachstehend anhand der Zeichnungen näher erläutert.The method according to the invention is explained in more detail below with reference to the drawings.
Fig. 1 veranschaulicht anhand eines Blockdiagramms den Verfahrensablauf und den Weg der einzelnen Fraktionen bzw. Anteile.1 uses a block diagram to illustrate the process sequence and the path of the individual fractions or portions.
Fig. 2 gibt ein Mengenfließdiagramm bezüglich der Restmüllverwertung wieder.2 shows a quantity flow diagram with regard to the recycling of residual waste.
Fig. 3 zeigt ein Prinzipschema des Glühbehandlungsschrittes.3 shows a basic diagram of the annealing treatment step.
Der anfallende Restmüll wird in einer mechanischen Aufbereitungsanlage, in welcher gefährliche Abfälle und Wertstoffe ausgesondert werden, in eine Leichtfraktion und eine Schwerfraktion aufgetrennt. Die Leichtfraktion, welche thermisch verwertbar ist, wird einer speziellen Verbrennungsanlage zugeführt. Dabei wird der hohe Glühverlust als Energieträger genützt und der Kohlenstoff zu Kohlendioxid verbrannt. Die Leichtfraktion hat einen hohen Heizwert und weist eine im wesentlichen konstante Zusammensetzung auf, wodurch der Betrieb von ökologisch sinnvollen und ökonomisch günstigen Verbrennungsanlagen, z.B. nach dem Prinzip der zirkulierenden Wirbelschicht, möglich ist.The residual waste is separated into a light fraction and a heavy fraction in a mechanical processing plant, in which hazardous waste and valuable materials are separated. The light fraction, which can be used thermally, is fed to a special incinerator. The high loss on ignition is used as an energy source and the carbon is burned to carbon dioxide. The light fraction has a high calorific value and has an essentially constant composition, which enables the operation of ecologically sensible and economically favorable combustion plants, for example according to the principle of the circulating fluidized bed.
Die aus der mechanischen Aufbereitungsanlage kommende Schwerfraktion wird einer biologischen Behandlung zugeführt, wobei gegebenenfalls Klärschlamm zugemischt werden kann. Die biologische Behandlung ist dabei ein Rotte- oder ein Vergärungsprozeß. An diese biologische Aufbereitungsanlage schließt nun als weiterer, neuer Verfahrensschritt an, daß das von dieser biologischen Rotte kommende Material, nachdem es durch Absiebung und Windsichtung in eine leichte und schwere Fraktion getrennt wird, weiter aufbereitet wird. Die gewonnene leichte Fraktion wird der Leichtfraktion, welche direkt aus der mechanischen Aufbereitungsanlage des Restmülls kommt, zugemischt und dort verbrannt. Die durch das Sieb hindurchfallende Fraktion bzw. die vom Windsichter kommende schwere Fraktion wird einem Nachglühschritt unterzogen. Die Absiebung des Produktes erfolgt dabei über ein Sieb mit einer bevorzugten Maschenweite von 15 mm. Das Nachglühen wird in einem speziellen Tunnelofen vorgenommen, wobei jedoch Voraussetzung ist, daß der Wassergehalt des in der biologischen Behandlungsstufe austretenden Materials auf ca. 20 Gew.-% herabgesetzt ist und die maximal mögliche Entfernung aller Leichtstoffe durch den Windsichter erzielt ist.The heavy fraction coming from the mechanical treatment plant is sent to a biological treatment, where appropriate sewage sludge can be added. The biological treatment is a rotting or fermentation process. As a further, new process step, this biological treatment plant now follows that the material coming from this biological rotting is further processed after it has been separated into a light and heavy fraction by sieving and air separation. The light fraction obtained is mixed with the light fraction, which comes directly from the mechanical processing plant of the residual waste, and burned there. The fraction falling through the sieve or the heavy fraction coming from the air classifier is subjected to an afterglow step. The product is screened through a sieve with a preferred mesh size of 15 mm. The afterglow is carried out in a special tunnel furnace, but it is a prerequisite that the water content of the material emerging in the biological treatment stage is reduced to approximately 20% by weight and that the maximum possible removal of all light materials is achieved by the air classifier.
Der Tunnelbrennofen wird bevorzugt mittels elektrischer Widerstandsheizelemente beheizt, um eine offene Flamme im Ofen zu vermeiden und dadurch die Brandgefahr herabzusetzen. In diesem Tunnelofen wird das zu behandelnde Gut auf eine Temperatur von etwa 1600°C aufgeheizt. Es entsteht dann ein glasartiges Produkt, welches nach entsprechender Abkühlung ohneweiters deponiert werden kann.The tunnel kiln is preferably heated by means of electrical resistance heating elements in order to avoid an open flame in the kiln and thereby reduce the risk of fire. The material to be treated is heated to a temperature of around 1600 ° C in this tunnel oven. A glass-like product is then created, which after appropriate cooling can be deposited in any case.
Der Tunnelofen ist in Fig. 3 mit 1 bezeichnet und weist ein Widerstandsheizelement 2zum Glühen des Gutes auf. Die Beschickung des Tunnelofens 1 erfolgt über ein Förderband 3, welches das Gut über einen Einfülltrichter 4 auf das durch den Ofen führende Förderband 5 auflegt. Von diesem Förderband 5 wird dann das Produkt bei 6 abgeworfen und einer Deponie zugeführt. Der Brennofen 1 weist eine Aufheizzone 7 und eine Kühlzone 8 auf, welche durch eine gezielte Luftführung erreicht wird. Zwischen diesen Zonen erfolgt das Ausglühen des Gutes. Zur Kühlung des geglühten Produktes wird über eine Pumpe 9 die Kühlluft am Ende der Kühlzone 8 am Boden des Brennofens eingeführt, tritt durch die zu kühlenden Materialien hindurch und wird am oberen Ende bei 10 aus dem Ofen herausgeführt. Die Leitung 10 führt dann in den mittleren Bereich der Aufheizzone 7 ein, wodurch das den Brennofen 1 eingebrachte Gut aufgewärmt wird. Das über die Leitung 11 aus dem Brennofen herausgeführte Aufwärmgas wird über einen Wärmetauscher 12 geführt, welcher über eine Frischwasserleitung 13 gekühlt ist. Das aus dem Wärmetauscher 12 austretende gekühlte Gas, welches mit Kondensat vermischt wird, wird über eine Leitung 14 einem Abscheider 15 zugeführt, wobei die abgekühlte Luft über die Leitung 16 in die Kühlzone des Brennofens 1 eingeführt ist, u.zw. in Richtung des Produktflusses vor der von der Pumpe 9 kommenden Leitung. Die Kühlluft wird von dem geglühten Gut aufgeheizt und tritt über die Leitung 17 aus der Kühlzone des Brennofens aus und wird nach der Einmündung der Leitung 10 wieder in den Brennofen 1, u.zw. in die Aufheizzone, eingeführt, wonach dann das abgekühlte Gas über die Leitung 18 aus dem Brennofen heraus und einem weiteren Wärmetauscher 19 zugeführt wird. Durch diesen Wärmeaustauscher wird über eine Frischluftpumpe 20 Frischluft eingeleitet, welche im Wärmetauscher 19 aufgewärmt und über eine Leitung 21 zu Beginn der Aufwärmzone 7 des Brennofens 1 eingebracht wird. Die so aufgewärmte Luft, welche auch mit flüchtigen Bestandteilen und Wasserdampf angereichert ist, tritt über die Leitung 22 aus dem Brennofen aus, wird über einen Abscheider 23 geführt und von dort über eine Leitung 24 einer Reinigungsstation 25 zugeleitet. Die Reinigungsstation 25 besteht aus zwei Waschstufen 26, 27, in welchen die im Abgas mitgenommenen Schadstoffe ausgewaschen bzw. neutralisiert werden. Es arbeitet nämlich die erste Waschstufe im sauren Bereich und die zweite Waschstufe im basischen Bereich. Die im Abgas mitkommenden Schadstoffe werden dadurch neutralisiert und in der Waschwasserbehandlungsanlage 25 als Feststoffe (REA-Produkte) ausgeschieden. Diese Feststoffe sind einer Deponie für gefährliche Abfälle zuzuführen. Die aus der Waschanlage 25 kommenden Abgase werden über einen Aktivkohlefilter 28 nochmals gereinigt, um eventuell noch mitkommende spezielle organische Schadstoffe abzuscheiden. Mittels einer Pumpe 29 werden diese Abgase über eine Leitung 30 einer Rotteanlage 31 zugeführt, u.zw. der biologischen Aufbereitungsanlage der schweren Fraktion der von der mechanischen Aufbereitungsanlage kommenden Restmüllfraktion. Von dieser Rotteanlage 31 austretende Abgase werden über eine Pumpe 32 einer Biowaschanlage 33 zugeführt und dann über die Leitung 34 in die Atmosphäre abgelassen.The tunnel furnace is designated by 1 in Fig. 3 and has a
Das von den Abscheidern 15 und 23 kommende Kondensat, sowie das aus dem Wärmeaustauscher 12 austretende Frischwasser wird über Leitungen 35 bzw. 36 in die Rotteanlage 31 zugeführt, um dort den Feuchtigkeitshaushalt zu steuern und auch um dort gegebenenfalls mitgenommene Schadstoffpartikel abzubauen.The condensate coming from the
Das in Fig. 2 wiedergegebene Mengenfließdiagramm zeigt in anderer Form das Fließdiagramm gemäß Fig. 1, jedoch unter Hinzufügung der in den einzelnen Abzweigungen geführten Substratmengen.The quantity flow diagram shown in FIG. 2 shows in another form the flow diagram according to FIG. 1, but with the addition of the substrate quantities carried in the individual branches.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT2644/93 | 1993-12-29 | ||
| AT0264493A AT399864B (en) | 1993-12-29 | 1993-12-29 | METHOD FOR TREATING RESIDUAL WASTE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0661367A1 true EP0661367A1 (en) | 1995-07-05 |
| EP0661367B1 EP0661367B1 (en) | 1998-09-02 |
Family
ID=3537967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94890218A Expired - Lifetime EP0661367B1 (en) | 1993-12-29 | 1994-12-22 | Process for treating waste |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0661367B1 (en) |
| AT (2) | AT399864B (en) |
| DE (1) | DE59406828D1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0899509B1 (en) | 1997-07-18 | 2000-11-02 | Amand Entwicklungs GmbH | Process and plant for the thermal treatment of waste and or fractions thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3736111A (en) * | 1971-05-17 | 1973-05-29 | Hercules Inc | Process and apparatus for the complete reclamation of valuable products from solid waste |
| DE3402215A1 (en) * | 1984-01-24 | 1985-07-25 | Peter 7869 Holzinshaus Voelskow | Method, plant and appliances for the simultaneous processing of refuse and sewage sludge |
| DE3440484A1 (en) * | 1984-11-06 | 1986-05-07 | Peter 7869 Aitern Voelskow | Process for low-temperature carbonisation of partially moist biomass wastes |
| DE3807249C1 (en) * | 1988-01-26 | 1990-02-15 | Peter 7869 Aitern De Voelskow | A process for the thermal utilisation of organic wastes |
-
1993
- 1993-12-29 AT AT0264493A patent/AT399864B/en not_active IP Right Cessation
-
1994
- 1994-12-22 EP EP94890218A patent/EP0661367B1/en not_active Expired - Lifetime
- 1994-12-22 DE DE59406828T patent/DE59406828D1/en not_active Expired - Lifetime
- 1994-12-22 AT AT94890218T patent/ATE170543T1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3736111A (en) * | 1971-05-17 | 1973-05-29 | Hercules Inc | Process and apparatus for the complete reclamation of valuable products from solid waste |
| DE3402215A1 (en) * | 1984-01-24 | 1985-07-25 | Peter 7869 Holzinshaus Voelskow | Method, plant and appliances for the simultaneous processing of refuse and sewage sludge |
| DE3440484A1 (en) * | 1984-11-06 | 1986-05-07 | Peter 7869 Aitern Voelskow | Process for low-temperature carbonisation of partially moist biomass wastes |
| DE3807249C1 (en) * | 1988-01-26 | 1990-02-15 | Peter 7869 Aitern De Voelskow | A process for the thermal utilisation of organic wastes |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE170543T1 (en) | 1998-09-15 |
| EP0661367B1 (en) | 1998-09-02 |
| ATA264493A (en) | 1994-12-15 |
| AT399864B (en) | 1995-08-25 |
| DE59406828D1 (en) | 1998-10-08 |
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