EP0870986A2 - Procédé de confinement des poussières de filtrage dans des scories - Google Patents

Procédé de confinement des poussières de filtrage dans des scories Download PDF

Info

Publication number
EP0870986A2
EP0870986A2 EP98103132A EP98103132A EP0870986A2 EP 0870986 A2 EP0870986 A2 EP 0870986A2 EP 98103132 A EP98103132 A EP 98103132A EP 98103132 A EP98103132 A EP 98103132A EP 0870986 A2 EP0870986 A2 EP 0870986A2
Authority
EP
European Patent Office
Prior art keywords
slag
combustion chamber
density
dust
filter dusts
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.)
Ceased
Application number
EP98103132A
Other languages
German (de)
English (en)
Other versions
EP0870986A3 (fr
Inventor
Horst Prof. Dr. Pentinghaus
Stefan Ebener
Thomas Dr. Hartmann
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.)
Forschungszentrum Karlsruhe GmbH
Original Assignee
Forschungszentrum Karlsruhe GmbH
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.)
Filing date
Publication date
Application filed by Forschungszentrum Karlsruhe GmbH filed Critical Forschungszentrum Karlsruhe GmbH
Publication of EP0870986A2 publication Critical patent/EP0870986A2/fr
Publication of EP0870986A3 publication Critical patent/EP0870986A3/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • 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
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • 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
    • F23G2202/00—Combustion
    • F23G2202/20—Combustion to temperatures melting waste

Definitions

  • the invention relates to a method for incorporating filter dusts in a slag according to the preamble of the first claim.
  • a method of this type is known from EP 0 302 310 A1.
  • waste is first pyrolyzed in a pyrolysis reactor.
  • the pyrolysis residues and the smoldering gases generated during pyrolysis burned in a combustion chamber.
  • the resulting in the combustion chamber Flue gas is removed from the flight dust in a dust filter system exempted.
  • the filter dusts are left without further treatment blown into the combustion chamber.
  • the publication states that they melted and in the slag of the Combustion chamber can be integrated. In doing so at the same time the heavy metals cadmium and zinc in the slag transferred.
  • the invention has for its object a method of propose the type mentioned, in which the filter dust incorporated into the slag to a significantly greater extent will.
  • the filter dusts are in the form of compacts, the density of which corresponds at least to the density of the slag, returned to the combustion chamber. It has shown, that in this way the proportion of filter dust, the combines with the slag compared to the known method can be increased significantly.
  • the shape of the compacts is of secondary importance for the success of the method according to the invention.
  • tablets can be produced with the known presses.
  • the density of the compacts is set to a value which corresponds at least to the density of the slag. Higher densities are advantageous.
  • the density of the compacts is therefore preferably at least 2 g / cm 3 .
  • the density of the compacts can be changed by means of a suitable press pressure, higher pressures resulting in denser compacts.
  • the filter dusts which mainly consist of the oxidic constituents K 2 O, N 2 O, CaO, Fe 2 O 3 , FeO, SO 4 2 -, are dissolved in the silicate melt in the combustion chamber and form structural elements when they cool vitreous slag.
  • the sulfate introduced into the melt is destroyed during this melting process; it releases sulfur dioxide and sulfur trioxide, which enters the flue gas and is therefore no longer available as a potential binding partner for other substances during dust formation.
  • the internal dust cycle significantly relieved.
  • the dust content in the raw gas becomes almost halved.
  • Due to the effective decomposition of the sulfates in the melt is discharged via the flue gas path Amount of sulfur dioxide / trioxide increased in the same way and relieves the sulfur cycle in the waste incineration plant.
  • the removal of sulfur as bile via the slag path significantly reduce or completely prevent.
  • the long-term environmental behavior as well as the technological usability of the Slag is improved according to the invention. Malfunctions due to the usual dust loading of the waste heat boiler are prevented and thus the economic efficiency of the system improved.
  • the main area of application of the invention is the smoldering method.
  • the method according to the invention can also be used in other waste treatment plants, in which the filter dust is transferred to the slag should.
EP98103132A 1997-04-07 1998-02-23 Procédé de confinement des poussières de filtrage dans des scories Ceased EP0870986A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997114218 DE19714218C1 (de) 1997-04-07 1997-04-07 Verfahren zum Einbinden von Filterstäuben in eine Schlacke
DE19714218 1997-04-07

Publications (2)

Publication Number Publication Date
EP0870986A2 true EP0870986A2 (fr) 1998-10-14
EP0870986A3 EP0870986A3 (fr) 1999-08-25

Family

ID=7825630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98103132A Ceased EP0870986A3 (fr) 1997-04-07 1998-02-23 Procédé de confinement des poussières de filtrage dans des scories

Country Status (2)

Country Link
EP (1) EP0870986A3 (fr)
DE (1) DE19714218C1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0302310A1 (fr) 1987-08-03 1989-02-08 Siemens Aktiengesellschaft Procédé et dispositif pour l'élimination thermique de déchets

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658464A5 (de) * 1983-06-03 1986-11-14 Orfa Ag Verfahren zur erzeugung schadstoffarmer brenn- bzw. abgase und einrichtung sowie pressling zur durchfuehrung des verfahrens.
DE3716444A1 (de) * 1987-05-16 1988-12-01 Hartmann Helmut Verfahren und anlage zur reinigung von kontaminierten schuettguetern
DE4107200A1 (de) * 1991-03-06 1992-09-10 Siemens Ag Verfahren und anlage zur thermischen abfallbehandlung
DE4413901C1 (de) * 1994-04-21 1995-08-24 Karlsruhe Forschzent Formkörper als Grünling aus verpressten Abfällen von Feuerungen
FR2736849B3 (fr) * 1995-07-21 1997-10-10 Calafell Claude Procede de stabilisation des residus d'incineration

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0302310A1 (fr) 1987-08-03 1989-02-08 Siemens Aktiengesellschaft Procédé et dispositif pour l'élimination thermique de déchets

Also Published As

Publication number Publication date
EP0870986A3 (fr) 1999-08-25
DE19714218C1 (de) 1998-04-09

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