EP0921352B1 - Verfahren für Verbrennung von Abfällen und Behandlung von Flugstäuben und Vorrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren für Verbrennung von Abfällen und Behandlung von Flugstäuben und Vorrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0921352B1
EP0921352B1 EP19980403008 EP98403008A EP0921352B1 EP 0921352 B1 EP0921352 B1 EP 0921352B1 EP 19980403008 EP19980403008 EP 19980403008 EP 98403008 A EP98403008 A EP 98403008A EP 0921352 B1 EP0921352 B1 EP 0921352B1
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EP
European Patent Office
Prior art keywords
pulp
household
ash
furnace
waste
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19980403008
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English (en)
French (fr)
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EP0921352A1 (de
Inventor
Frank Georges Jacques Tabaries
Guy Emile Chanty
Jean-Pierre Aubin Edmond Durand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNIM Groupe SA
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Constructions Industrielles de la Mediterrane CNIM SA
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/06—Systems for accumulating residues from different parts of furnace plant
    • 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
    • F23G5/008—Incineration of waste; Incinerator constructions; Details, accessories or control therefor adapted for burning two or more kinds, e.g. liquid and solid, of waste being fed through separate inlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/70—Blending
    • F23G2201/702—Blending with other waste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/10—Combustion in two or more stages
    • F23G2202/106—Combustion in two or more stages with recirculation of unburned solid or gaseous matter into combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/10—Liquid waste
    • F23G2209/101—Waste liquor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/12—Sludge, slurries or mixtures of liquids

Definitions

  • the invention relates to a method for processing fly ash entrained by the fumes emitted during the incineration of household and / or industrial waste, to a household waste incineration process and / or manufacturers including such a process for processing entrained fly ash, and a device for the implementation of these methods.
  • fly ash are pulverulent solids made up unburnt particles, silicates and silico-aluminates calcium, inorganic chlorides in particular of heavy metals and alkaline earths such than sodium and potassium chlorides, oxides, sulfates and calcium carbonates as well as metals heavy. These fly ash are collected throughout along the smoke circuit from which they are separated, particular, by filters.
  • WO-A-8,909,253 describes a reduction method acid gas emissions by reducing agents put in contact with fly ash, this process involving the disposal of said ashes by their transformation into bottom ash in the incinerator.
  • the invention aims to overcome the drawbacks of the methods of the prior art by proposing a treatment method fly ash entrained by the fumes emitted during the incineration of household waste and / or industrialists by transforming these ashes into bottom ash by clinkérisation.
  • the invention uses a reverse reaction to WO-A-8,909,253 allowing the elimination of inorganic chlorides and leading to the formation of hydrochloric acid.
  • said supply of water is made by adding water alone.
  • said contribution water is made by adding wet sludge water, organic matter and mineral matter such as sludge from stations water purification or black liquors from paper mills.
  • said pulp has a dryness of between 20 and 40% by weight.
  • a mixture of said pulp is produced with household and / or industrial waste before introduction of this mixture by the normal means of introducing household and / or industrial waste.
  • household and / or industrial waste is introduced by normal means of waste introduction and the pulp is introduced by means of introduction separate located upstream and in the cold zone of the the incinerator.
  • the pulp and household waste and / or manufacturers are introduced by separate means, the household and / or industrial waste being introduced by the normal way of introducing waste and pulp being introduced directly into the hearth of the incinerator.
  • the invention also relates to an incineration process household and / or industrial waste, characterized in that that he understands the treatment of fly ash driven by the fumes emitted during this incineration by the process described above.
  • said means of transport is connected to the household by the means of introduction opening into the chute located under the normal hopper for the introduction of household waste and / or industrial.
  • said means of transport is connected to the household by the hopper normal introduction of household waste and / or industrial.
  • said introduction means is connected directly to the fireplace, in hot zone.
  • the means of transporting the pulp is a pump associated with a conduit.
  • the means of transporting the pulp is consisting of bulk mechanical conveyors, with belts or bucket.
  • the waste to be incinerated is introduced through the hopper 11 and the chute 9 in a combustion hearth 10 where they are cremated.
  • the incinerator used in this process can be either a oven without heat recovery, in which case all ash is collected under filter 2, i.e. a furnace-boiler that is to say an oven equipped with the hearth 10 and a heat recovery means constituted by the boiler 1, in which case the ashes are recovered from a partly under the boiler 1 and partly under the filter 2.
  • filter 2 i.e. a furnace-boiler that is to say an oven equipped with the hearth 10 and a heat recovery means constituted by the boiler 1, in which case the ashes are recovered from a partly under the boiler 1 and partly under the filter 2.
  • the fly ash is then further processed in another device, before storage.
  • the invention proposes to process the fly ash continuously and in the same installation as that planned for the treatment of waste themselves.
  • the invention proposes to collect the all of the ashes, and mix them in a mixer 5 with water from an introduction means 6.
  • a pulp is formed which is then injected by a means of transport 7, 8, into the hearth 10.
  • This reintroduction of ashes, in the form of pulp in focus 10 can be done either directly in the hearth 10 and in the hot zone, by a device sludge injection known per se, either with waste to be incinerated, in a cold zone.
  • the pulp may either be mixed with the waste to be incinerated before introduction of this pulp / waste mixture through the hopper 11, either injected by a separate introduction means, in the chute 9.
  • the process for handling fly ash from the invention is therefore particularly advantageous because it transforms ash into bottom ash, which is easily recyclable and therefore recoverable.
  • this process directly uses the thermal energy of the household and / or industrial waste incinerator and minimizes the thermal energy required to process ash which only affects the surface of the grains of ashes and not the whole mass of these grains, and this without addition of reagent.
  • the chlorine present in these ash is removed as hydrochloric acid by hydrolysis of alkali and alkaline earth chlorides and heavy metals, this hydrochloric acid then being retained in the smoke treatment system including the incineration plant is regulated equipped. This process also removes unburnt from carbon in the form of carbon dioxide.
  • Water to make an easily transportable pulp, preferably by a pump, and to hydrolyze the chlorides is supplied by either water alone or, advantageously, by the water contained in sludge wet from water treatment plant. In the latter case, we save the water that should have been used to make the pulp.
  • the clinkerization of ash and incineration of sludge from water treatment plants are performed in a single operation.
  • the waste is introduced through the hopper 11 and the ashes are collected under the boiler 1 and under the filter 2 and are routed by screws 3 and 4 to a mixer 5.
  • the ash represents approximately a weight of 20 kg of dry matter.
  • the mixer 5 is supplied with water by the means introduction 6.
  • Water is dosed by a system volumetric or classical mass so as to obtain out of the mixer a pulp having a dryness, that is to say a dry matter content, which allows it to be easily pumped by a pump 7 known per se.
  • the pump 7 is volumetric. She sends the pulp through the conduit 8 and the introduction means 15 located in the chute 9 in the hearth 10.
  • the pulp is introduced into the hearth 10 at the same time that the waste and we will make sure to distribute the pulp on the entire width of the chute 9.
  • the invention allows a continuous treatment and complete elimination of the need to dispose of fly ash.
  • the mixer 5 is fed, by the introduction means 6, with wet sludge from water treatment plants.
  • 150 kg of sludge at 20% by weight of materials are used dry, which gives a pulp with a dryness of 30% which is still easily transportable, for example by pumping.
  • a means of transport is used here mechanical consisting of a series of mass conveyors or belt and bucket elevator.
  • the pulp is mixed with the waste to be incinerated before introduction of this mixing by hopper 11.
  • the pulp / waste mixture to to be cremated is then sent to hearth 10 where the fly ash undergoes hydrolysis reactions and of clinkering described above and are integrated clinker resulting from waste incineration themselves.
  • Example 1 the clinkerized ashes have then the same physico-chemical characteristics as clinkers.
  • Example 2 The procedure is as in Example 1, except that the pulp is directly introduced into the hearth 10. Again, the pulp will be hydrolyzed and clinkered and integrated into the clink as in examples 1 and 2.
  • the ash treatment process and device flying driven by the fumes from the incineration of household and / or industrial waste according to the invention and as described above, can of course be integrated into a process and a waste incineration device, respectively industrial and / or household goods of the prior art.
  • the invention also encompasses all of the household waste and / or incineration processes manufacturers that include the processing step ash entrained by the fumes from the incineration of household and / or industrial waste and which consists of collecting these ashes, transforming them into aqueous pulp and to recycle them, in the incinerator of waste, to clinkerize it and integrate it into clinkers produced in this incinerator.
  • any device for the incineration of household and / or industrial waste which includes the ash treatment device entrained by fumes from the incineration of household waste and / or industrial and which includes a means of transformation, recovery and transformation of ash into pulp aqueous and a means of injection and recycling of this aqueous pulp in the incinerator is encompassed by the invention.
  • the method and the device of the invention are not limited to injection means, pulp transport, obtaining pulp and recycling this pulp in the fireplace described and illustrated here, as long as these means are used to recycle the ash entrained in the gases from the incineration of household waste and / or industrial, in the form of aqueous pulp, in the incinerator itself.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (13)

  1. Verfahren zur Behandlung der Flugaschen, welche mit Rauchen mitgezogen werden, die bei der Verbrennung von Haushalts- und Industrieabfällen ausgestoßen wird, dadurch gekennzeichnet, dass es die Stufen umfasst von:
    Sammeln der Aschen entlang eines Kreislaufs der Rauche,
    Bildung einer Weichmasse durch Zufuhr von Wasser zu diesen Aschen,
    Einführung der so erhaltenen Weichmasse in den Feuerraum (10) des Abfallverbrenners (1), um die Aschen durch Hydrolyse der in den Aschen enthaltenen Chloride und Klinkerbildung zu Schlacke zu machen,
    Gewinnung am Ausgang des Brenners (1) der gebildeten Schlacken durch den Abzieher (12).
  2. Verfahren zur Behandlung nach Anspruch (1), dadurch gekennzeichnet, dass die Wasserzufuhr mittels einer einzigen Wasserzufuhr durchgeführt wird.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Wasserzufuhr durch Zugabe von aus Wasser, organischen Materialien und mineralischen Materialien bestehenden feuchten Schlämmen, wie z.B. Schlämmen, die von Wasserverdampfungsstationen oder den schwarzen Flüssigkeiten von Papierherstellungen kommen, durchgeführt wird.
  4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Weichmasse eine Trockenheit zwischen 20 und 40 Gew.% hat.
  5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass man eine Mischung der Weichmasse mit den Haushalts- und Industrieabfällen vor Einführung dieser Mischung durch das Einführungsmittel (11) der Industrie- und/oder Haushaltsabfälle durchführt.
  6. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Haushalts- und/ oder Industrieabfälle durch das normale Einführungsmittel (11) eingeführt werden und dass die Weichmasse durch ein getrenntes Einführungsmittel (15) eingeführt wird, dass stromaufwärts und in der kalten Zone des Feuerraums (10) angeordnet ist.
  7. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Weichmasse und die Haushalts- und/oder Industrieabfälle durch getrennte Einführungsmittel eingeführt werden, wobei die Haushalts- und/oder Industrieabfälle durch das normale Einführungsmittel (11) eingeführt werden und die Weichmasse direkt in den Feuerraum (10) des Brenners (1) eingeführt wird.
  8. Verfahren zur Verbrennung der Haushalts- und/oder Industrieabfälle, dadurch gekennzeichnet, dass es die Behandlung der durch die Rauche mitgezogenen Flugaschen, welche bei dieser Verbrennung ausgestoßen werden, umfasst, durch ein Verfahren nach einem der Ansprüche 1 bis 7.
  9. Vorrichtung zur Durchführung des Verfahrens gemäß einem der vorhergehenden Ansprüche umfassend:
    ein Mittel (11) zur Einführung der Abfälle in den Feuerraum (10) eines Brenners (1),
    einen Abzieher (12), der am unteren Ausgang des Feuerraumes (10) angeordnet ist, um die so gebildeten Schlacken zu gewinnen,
    ein Trennmittel (2) der Flugaschen der Rauche zum Reinigen dieser Rauche,
    ein Mittel zur Extraktion (13) und zur Entfernung (14) der gereinigten Rauche und
    dadurch gekennzeichnet, dass sie zusätzlich umfasst:
    wenigstens ein Mittel zur Gewinnung (3, 4) der Flugaschen entlang des Kreislaufs der Rauche verbunden mit einem Knetmischer (5),
    ein Mittel zum Speisen einer wässrigen Lösung (6), dass mit dem Knetmischer (5) verbunden ist,
    ein Transportmittel (7, 8) der in dem Knetmischer (5) gebildeten Weichmasse, das den unteren Teil des Knetmischers (5) direkt oder indirekt mit dem Feuerraum (10) des Brenners (1) verbindet um die Weichmasse in den Feuerraum (10) zuzuführen, damit die Aschen zu Schlacken durch Hydrolyse der in den Aschen enthaltenen anorganischen Chloride und durch Klinkerbildung umgeformt werden.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass das Transportmittel (7, 8) mit dem Feuerraum (10) durch das Mittel zur Einführung (15) verbunden ist, welches in einer Rutsche (9) mündet, die unter dem Trichter (11) zur normalen Einführung der Haushalts- und/oder Industrieabfälle angeordnet ist.
  11. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass das Transportmittel (7, 8) mit dem Feuerraum (10) durch den Trichter (11) zur normalen Einführung der Haushalts- und/oder Industrieabfälle verbunden ist.
  12. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass das Transportmittel (7, 8) direkt mit dem Feuerraum (10) in der warmen Zone verbunden ist.
  13. Vorrichtung nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass das Transportmittel (7, 8) eine Pumpe (7) ist, die mit einer Leitung (8) verbunden ist.
EP19980403008 1997-12-05 1998-12-01 Verfahren für Verbrennung von Abfällen und Behandlung von Flugstäuben und Vorrichtung zur Durchführung des Verfahrens Expired - Lifetime EP0921352B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9715419A FR2771946B1 (fr) 1997-12-05 1997-12-05 Procede d'incineration de dechets, procede de traitement des cendres volantes et dispositif pour la mise en oeuvre de ces procedes
FR9715419 1997-12-05

Publications (2)

Publication Number Publication Date
EP0921352A1 EP0921352A1 (de) 1999-06-09
EP0921352B1 true EP0921352B1 (de) 2004-06-23

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EP19980403008 Expired - Lifetime EP0921352B1 (de) 1997-12-05 1998-12-01 Verfahren für Verbrennung von Abfällen und Behandlung von Flugstäuben und Vorrichtung zur Durchführung des Verfahrens

Country Status (4)

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EP (1) EP0921352B1 (de)
ES (1) ES2223112T3 (de)
FR (1) FR2771946B1 (de)
PT (1) PT921352E (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105910112A (zh) * 2016-04-18 2016-08-31 娈疯 垃圾焚烧厂飞灰综合处理工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1014437A3 (nl) * 2001-10-24 2003-10-07 Meyer Andru De Methode en inrichting voor het verdikken, drogen en verbranden van vochtige massa's zoals varkensmest zonder voorafgaandelijke scheiding.
DE10213787C1 (de) * 2002-03-27 2003-11-27 Martin Umwelt & Energietech Verfahren zum Minimieren der Konzentration an toxischen organischen Schadstoffen in Flugstäuben

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2169733B1 (de) * 1972-01-31 1974-09-13 Socea
US4231303A (en) * 1978-10-31 1980-11-04 Showa Denki K.K. Method for incineration of organic chlorine compound and incinerator used therefor
FR2579723B2 (fr) * 1985-04-01 1988-06-17 Henry Eugene Incinerateur de boues urbaines et ordures
DK153888A (da) * 1988-03-21 1989-09-22 Fls Miljoe A S Fremgangsmaade til forbraending af affald
FR2700605B1 (fr) * 1993-01-19 1995-03-17 Cnim Dispositif d'injection de boues dans un incinérateur de déchets.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105910112A (zh) * 2016-04-18 2016-08-31 娈疯 垃圾焚烧厂飞灰综合处理工艺

Also Published As

Publication number Publication date
FR2771946A1 (fr) 1999-06-11
ES2223112T3 (es) 2005-02-16
PT921352E (pt) 2004-10-29
EP0921352A1 (de) 1999-06-09
HK1021219A1 (en) 2000-06-02
FR2771946B1 (fr) 2000-01-28

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