EP0740110A2 - Procédé et appareil pour le traitement de résidus solides de combustion d'une installation de combustion, notamment d'un incinérateur - Google Patents

Procédé et appareil pour le traitement de résidus solides de combustion d'une installation de combustion, notamment d'un incinérateur Download PDF

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Publication number
EP0740110A2
EP0740110A2 EP96100180A EP96100180A EP0740110A2 EP 0740110 A2 EP0740110 A2 EP 0740110A2 EP 96100180 A EP96100180 A EP 96100180A EP 96100180 A EP96100180 A EP 96100180A EP 0740110 A2 EP0740110 A2 EP 0740110A2
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EP
European Patent Office
Prior art keywords
chute
combustion residues
detoxifier
water
discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96100180A
Other languages
German (de)
English (en)
Other versions
EP0740110B1 (fr
EP0740110A3 (fr
Inventor
Walter Josef Martin
Johannes Josef Edmund Martin
Oliver Dr. Gohlke
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.)
Martin GmbH fuer Umwelt und Energietechnik
Original Assignee
Martin GmbH fuer Umwelt und Energietechnik
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Martin GmbH fuer Umwelt und Energietechnik filed Critical Martin GmbH fuer Umwelt und Energietechnik
Publication of EP0740110A2 publication Critical patent/EP0740110A2/fr
Publication of EP0740110A3 publication Critical patent/EP0740110A3/fr
Application granted granted Critical
Publication of EP0740110B1 publication Critical patent/EP0740110B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/02—Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01021—Removing ashes from the ash pit using reciprocating means, e.g. pushers

Definitions

  • the invention relates to a method for the treatment of solid combustion residues of an incineration plant, in particular a waste incineration plant with a combustion grate and a subsequent detoxifier filled with liquid, having an inlet shaft and a push-out plunger, by means of which combustion residues are conveyed out via an upwardly extending discharge chute.
  • the invention also relates to an apparatus for performing the method.
  • the incineration residues, in particular slag and ash, which accumulate at the end of a combustion grate of an incineration plant, are removed by means of a detoxifier filled with water, into which an inlet shaft extending from the end of the incineration grate is immersed and thus closes off the combustion chamber in an airtight manner Ejection plunger is discharged via an extending chute.
  • the object of the invention is to largely avoid the outlay in terms of apparatus and nevertheless to enable treatment of the solid combustion residues which lead to satisfactory slag properties with regard to landfill capability and further processing to building materials.
  • combustion residues are washed in the purifier, in which the combustion residues are accumulated in the chute by appropriate regulation of the discharge speed and from the Wash liquid from top to bottom.
  • the solid combustion residues are preferably dammed up above the water level in the inlet shaft.
  • a significant improvement with regard to the separation of heavy metals is achieved in a further development of the invention in that a chemical, preferably acid, for example hydrochloric acid or phosphoric acid, is used for the washing, with the accumulation or piling up of the solid combustion residues, in particular beyond the liquid surface , particularly good prerequisites for washing by means of a chemical, in particular acid, are created, since by piling up the combustion residues, long distances for the washing liquid through these combustion residues and thus long dwell times are available, which can be satisfactorily washed out without additional containers or reactors Ensure heavy metals from the solid combustion residues.
  • a chemical, preferably acid for example hydrochloric acid or phosphoric acid
  • the washing liquid or chemical Due to the build-up of the combustion residues above the liquid level, the washing liquid or chemical initially comes into contact with dry combustion residues, specifically in the chute, in which there are no special mechanical influences on the walls of the chute, so that it is used for its manufacture Materials can be used that are suitable for the use of strong acids.
  • the corresponding trickle of the washing liquid or chemical through the combustion residues reaches the liquid level below which the push rod is located, in the case of an acid washing liquid, this is neutralized by the basic combustion residues to such an extent that an attack by those parts of the detoxifier that occur are in the liquid and are subject to a particularly high level of mechanical abrasion, which is why these parts can no longer be feared at an affordable cost from acid-resistant material.
  • the piling up of the solid combustion residues within the chute beyond the liquid level is therefore an essential prerequisite for the use of chemicals, in particular acids, within the detoxifier.
  • the detoxifier water loaded with washout products and accumulating in the detoxifier is placed inside the liquid surface set at the lower end of the inlet shaft the area bounded by the chute or removed from the detoxifier.
  • This type of removal of the resulting sludge is particularly advantageous when working with counter-current washing liquid starting from the end of the expulsion, since in the area of the liquid surface at the lower end of the inlet shaft, the two streams meet within the detoxifier, so that on the one hand the already through the In the chute trickling down washing liquid separated components and on the other hand those components can be removed that have accumulated on the combustion residues and are rinsed off by the washing liquid introduced at the end of the expulsion.
  • detoxifying water can either be fed to an exhaust gas purification device downstream of the combustion process or to a washing stage for neutralizing acidic exhaust gases originating from the combustion process.
  • this detoxifying water is atomized in the exhaust gas stream, whereby acidic exhaust gases can be neutralized on the one hand and the water content expelled on the other.
  • the dry fraction is fed to the other filter dusts that have been separated from the waste gas from the incineration plant.
  • the second option is to use the detoxifying water to neutralize acid waste gases in wet scrubbers.
  • This at the lower end of the chute or from the detoxifier detoxified water can advantageously be mixed with the combustion residues falling through the grate, so that they do not have to be extinguished in an additional special detoxifier, which is necessary if, together with others, in the Detoxifier that has been washed out and combustible components are to be reintroduced into the combustion process, since it is not possible to recycle the combustion residues that have fallen through the grate directly into the feed chute because of a possible fire hazard.
  • the quantity of washing liquid supplied in the region of the upper end of the inlet shaft is preferably 0.2 to 20 m 3 per ton of combustion residues, while the quantity supplied in countercurrent at the end of the expulsion of the detoxifier Washing liquid is 0.2 to 4m 3 per ton of combustion residues.
  • the device for carrying out the method is characterized by a detoxifier, in which a device for supplying washing liquid is provided in the region of the upper end of the chute, through which the washing liquid can be distributed over the entire cross section of the chute. In this way, a uniform sprinkling of the combustion residues with washing liquid is achieved.
  • This washing liquid can either be circulated detoxifying water and / or a chemical, preferably an acid.
  • the device for supplying washing liquid can advantageously comprise spray nozzles which are provided in the side walls of the inlet shaft. This configuration not only permits a uniform sprinkling of the combustion residues with washing liquid, but also enables the solid combustion residues to fall through without problems.
  • the device for supplying washing liquid can also comprise perforated tubes which cross the inlet shaft.
  • the holes in the tubes act as spray nozzles. Since you can get by with just a few tubes, there is practically no obstruction within the path of the combustion residues.
  • the parts of the detoxifier which are mechanically particularly stressed by the push-out plunger consist of an abrasion-resistant but not resistant to acid material and the parts which are less mechanically stressed, in particular the walls of the inlet shaft, consist of an acid-resistant material, such a detoxifier is special economically suitable for the use of an acidic washing liquid.
  • spray nozzles for fresh water or washing liquid are provided on the discharge side of the detoxifier, which allow a uniform distribution of the liquid over the combustion residues located on the discharge chute.
  • the detoxifier is connected to an airtight sedimentation basin via a discharge channel starting from its liquid level within the chute or the detoxifier, then a safe and controllable removal of the detoxifier water including the suspended fine particles resulting from the washing process is made possible, without the risk that false air can enter the combustion chamber operated with negative pressure.
  • FIG. 1 shows a known deslagger, generally designated 1, which comprises a chute 2, a discharge chute 3 and a push rod 6 articulated in the rear area 4 of the deslagger to a driven swivel arm 5, which slag falling down from a furnace grate (not shown) pushes the extending chute 3 out into a chute 7.
  • a constant liquid level 9 is maintained in the deslagger 1, which is set so high that the lower edge 2a of the inlet shaft 2 is immersed in the water.
  • the same conditions are present with regard to the essential components of the detoxifier 1 as in FIG. 1. For this reason, only the deviations are explained.
  • the washing liquid which can be water and / or a chemical, preferably an acid, is supplied via a ring line 12 which is connected to spray nozzles 13 which are provided in the side walls of the chute 2. These spray nozzles 13 allow sprinkling of the piled up slag 11 within the chute 2 over the entire cross section of the same.
  • the removal of the detoxification water loaded with washout products takes place via a discharge line 10 which starts from the rear area 4 of the detoxification 1.
  • FIG. 3 shows the same structure of the essential parts of the detoxifier as compared to the embodiment according to FIG. 2.
  • a washing liquid which can be water or a chemical, in particular a base or phosphate compounds, is fed through the inlet 8 in the discharge chute 7 of the detoxifier 1 supplied.
  • the detoxified water which is drawn off via the discharge line 10 from the rear space 4 of the detoxifier and is loaded with washout products is pumped into the ring line 12 leading to the spray nozzles 13 via a line 12a.
  • Part of this already loaded liquid is branched off via a valve 15 and a further line 16, on the one hand to keep the liquid level 9 in the detoxifier 1 at a certain level, which is necessary because of the liquid supply through the inlet 8 and on the other hand the concentration not to carry too much entrained sludge, salts and other pollutants too high.
  • the slag 11 piled up in the chute 2 is sprinkled by circulating deslagging water, which can be mixed with a chemical, preferably an acid, via a line 12b opening into the ring line 12. Due to the constant supply of liquid at the inlet 8 and the removal of detoxifying water via the valve 15 and the line 16, the concentration of pollutant parts taken up is kept at a certain level.
  • fresh water or a chemical preferably a base or a substance from the group of the phosphates
  • a chemical preferably an acid and / or detoxifying water
  • the latter is removed from a settling basin 17, which is hermetically sealed and is connected to the detoxifier 1 via an outlet channel 18, the outlet channel 18 starting from an area at the level of the liquid level 9 within the chute 2 or the underlying detoxifier.
  • a chemical preferably an acid
  • the chemical can also be added instead of the detoxifying water if this requires treatment of the combustion residues.
  • a discharge line 21 in which a shut-off valve 22 is seated, liquid is drawn off from the settling basin 17 at its lower end by means of a further pump 23, where the detoxifying water is strongly enriched by the sinking solid particles.
  • the amount withdrawn is regulated by the pump 23 in such a way that in the discharge channel 18, which is connected to the liquid level 9 within the chute 2, such a removal speed is achieved that only solid parts up to a grain size of 2 mm are removed.
  • the parts above in the diameter are pushed out with the other coarse slag parts through the push rod 6 over the push chute 3.

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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)
EP96100180A 1995-03-09 1996-01-08 Procédé et appareil pour le traitement de résidus solides de combustion d'un incinérateur Expired - Lifetime EP0740110B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19508488 1995-03-09
DE19508488A DE19508488C3 (de) 1995-03-09 1995-03-09 Verfahren und Vorrichtung zum Erzeugen von deponiefähigen oder weiterverarbeitbaren Verbrennungsrückständen aus einer Abfallverbrennungsanlage

Publications (3)

Publication Number Publication Date
EP0740110A2 true EP0740110A2 (fr) 1996-10-30
EP0740110A3 EP0740110A3 (fr) 1998-03-11
EP0740110B1 EP0740110B1 (fr) 2001-06-27

Family

ID=7756206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100180A Expired - Lifetime EP0740110B1 (fr) 1995-03-09 1996-01-08 Procédé et appareil pour le traitement de résidus solides de combustion d'un incinérateur

Country Status (11)

Country Link
US (1) US5711233A (fr)
EP (1) EP0740110B1 (fr)
JP (1) JP2931551B2 (fr)
AT (1) ATE202627T1 (fr)
CA (1) CA2171245C (fr)
DE (2) DE19508488C3 (fr)
DK (1) DK0740110T3 (fr)
ES (1) ES2160183T3 (fr)
RU (1) RU2103605C1 (fr)
SG (1) SG42351A1 (fr)
TW (1) TW289790B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2062647A3 (fr) * 2007-11-26 2012-12-19 Hanseatisches Schlackenkontor GmbH Procédé de fabrication d'un granulé de scorie compressible

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747504A1 (de) * 1997-10-28 1999-04-29 Babcock Anlagen Gmbh Verfahren zur Behandlung von Verbrennungsrückständen
DE10213789B4 (de) * 2002-03-27 2006-04-20 Martin GmbH für Umwelt- und Energietechnik Verfahren zur Behandlung von Verbrennungsrückständen einer Verbrennungsanlage
DE10213790B4 (de) * 2002-03-27 2006-05-24 Martin GmbH für Umwelt- und Energietechnik Verfahren zur Abfallverbrennung in einer Abfallverbrennungsanlage
US20050211143A1 (en) * 2003-09-04 2005-09-29 Recycling Solutions Technology, Llc System and method of generating electricity
US6932002B2 (en) * 2003-09-04 2005-08-23 Recycling Solutions Technology, Llc System and method of processing solid waste
US9557115B2 (en) 2010-10-28 2017-01-31 General Electric Technology Gmbh Orifice plate for controlling solids flow, methods of use thereof and articles comprising the same
US9617087B2 (en) * 2010-10-28 2017-04-11 General Electric Technology Gmbh Control valve and control valve system for controlling solids flow, methods of manufacture thereof and articles comprising the same
US9885478B1 (en) 2011-02-28 2018-02-06 Recycling Solutions Technology, Llc Process for generating combustible gas from organic feedstock and reactors therefor
DE102011013034A1 (de) * 2011-03-04 2012-09-06 Alexandra Beckmann Gewinnung von verwertbaren Stoffen aus Müllverbrennungsasche
DE102011013033A1 (de) * 2011-03-04 2012-09-06 Alexandra Beckmann Aufbereiten von Müllverbrennungsasche
EP3022489B1 (fr) * 2013-07-17 2017-09-06 Georg Schons Procédé permettant de traiter une scorie dans des installations d'incinération de déchets et installation d'incinération de déchets
JP6417617B1 (ja) * 2018-02-09 2018-11-07 三菱重工環境・化学エンジニアリング株式会社 灰押出装置
JP6752988B1 (ja) * 2020-04-27 2020-09-09 三菱重工環境・化学エンジニアリング株式会社 灰押出装置及び灰押出装置の改造方法

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DE486132C (de) * 1929-11-08 Max Birkner Einrichtung zum selbsttaetigen Austragen von Feuerungsrueckstaenden
DE524207C (de) * 1928-12-13 1931-05-05 Kosmos G M B H Rud Pawlikowski Entaschungsvorrichtung mit einem Austropfspalten enthaltenden Sammel- und Loeschschacht
GB379508A (en) * 1930-09-03 1932-09-01 Rheinisches Elek Zitaetswerk I Improvements in or relating to furnaces, particularly to devices for removing the ashes therefrom
DE711606C (de) * 1938-02-02 1941-10-03 Josef Martin Feuerung
CH488970A (de) * 1969-03-05 1970-04-15 Von Roll Ag Verfahren und Einrichtung für die Abkühlung von Schlacke aus Verbrennungsöfen
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2062647A3 (fr) * 2007-11-26 2012-12-19 Hanseatisches Schlackenkontor GmbH Procédé de fabrication d'un granulé de scorie compressible

Also Published As

Publication number Publication date
ATE202627T1 (de) 2001-07-15
US5711233A (en) 1998-01-27
DE59607150D1 (de) 2001-08-02
JP2931551B2 (ja) 1999-08-09
DE19508488A1 (de) 1996-09-19
SG42351A1 (en) 1997-08-15
CA2171245A1 (fr) 1996-09-10
EP0740110B1 (fr) 2001-06-27
DE19508488C3 (de) 2001-03-15
EP0740110A3 (fr) 1998-03-11
JPH08261438A (ja) 1996-10-11
ES2160183T3 (es) 2001-11-01
RU2103605C1 (ru) 1998-01-27
CA2171245C (fr) 1999-12-21
DE19508488C2 (de) 1997-05-07
TW289790B (fr) 1996-11-01
DK0740110T3 (da) 2001-10-15

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