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EP2061730A2 - Procédé de prétraitement de charges contaminées avec des porteurs de carbone - Google Patents

Procédé de prétraitement de charges contaminées avec des porteurs de carbone

Info

Publication number
EP2061730A2
EP2061730A2 EP07825071A EP07825071A EP2061730A2 EP 2061730 A2 EP2061730 A2 EP 2061730A2 EP 07825071 A EP07825071 A EP 07825071A EP 07825071 A EP07825071 A EP 07825071A EP 2061730 A2 EP2061730 A2 EP 2061730A2
Authority
EP
European Patent Office
Prior art keywords
reactor
contaminated
gases
temperatures
heated
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.)
Withdrawn
Application number
EP07825071A
Other languages
German (de)
English (en)
Inventor
Jorge Guillermo Franco Zesati
Francisco Salas Vallejo
Armando Alberto Cruz Arellano
Beat Stoffel
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.)
Holcim Technology Ltd
Original Assignee
Holcim Technology Ltd
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 Holcim Technology Ltd filed Critical Holcim Technology Ltd
Publication of EP2061730A2 publication Critical patent/EP2061730A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
    • C04B7/4446—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes the fuel being treated in a separate gasifying or decomposing chamber, e.g. a separate combustion chamber

Definitions

  • the present invention relates to a process for the pretreatment of charges contaminated with carbon carriers for use in clinker furnaces.
  • From DE-C 35 33 775 is a plant for the production of cement clinker from raw meal using heat-containing
  • EP 1 334 954 A1 shows and describes a further development of this plant in which the utilization of heat-value-containing waste materials in a separate rotary kiln is now used to preheat cement raw meal in this separate reactor. Again, it was recognized that in the pollination or combustion of waste and in particular also lumpy waste in a rotary kiln can not be guaranteed that uniform conditions for the thermal treatment are created and in particular the occurrence of temperature peaks is prevented, leading to unwanted solid caking in the Rotary kiln leads.
  • the invention now aims to provide a method of the type mentioned, in which using known devices with only simple modifications of this device, the processing of, for example, petroleum-contaminated soils, soils, rocks, minerals or batches with low calorific value suitable for use in clinker furnaces. Specifically, the contaminated soils degraded near oilfields present a problem that could not be adequately solved by the known methods.
  • the inventive method is essentially characterized in that the batches are placed in a reactor and heated or dried with gases that the heated gases are withdrawn at temperatures below 1250 0 C preferably 700-900 0 C and the heated or dried batch at temperatures between 500 0 C and 1000 0 C is applied separately, wherein the temperatures by a regulation of the fresh air supply, a water or water vapor feed, adjusted and maintained by controlling the feed rate of the charge and / or process gases, such as tertiary air and, if necessary, by combustion of fuels to stabilize the temperature distribution in the reactor and that the gases withdrawn from the reactor at least partially in a circle to the reactor recycled and / or a Vorkalzinierprocess and / or a preheating the clinker furnace are supplied.
  • gases by a regulation of the fresh air supply, a water or water vapor feed, adjusted and maintained by controlling the feed rate of the charge and / or process gases, such as tertiary air and, if necessary, by combustion of fuels to stabilize the temperature distribution in the reactor and that
  • the essential advantage of the method according to the invention is that the temperatures are now influenced by a much more extensive control to meet the most diverse starting materials and in particular the contaminated with carbon carriers batches.
  • the regulation of the temperatures takes place not only by regulating the fresh air supply or by regulating the feed rate of the charge and / or process gases, such as tertiary air, but also, above all, additionally a possibility for the introduction of water or water vapor is provided in the reactor.
  • Contaminated waters can also be disposed of with such a device, wherein at the same time a reforming of gases can be carried out in the interior of the reactor in order to obtain high quality fuel gases directly.
  • the process according to the invention is carried out in such a way that the regulation of the temperatures with water is carried out using contaminated water, in particular contaminated with oil and / or hydrocarbons.
  • the procedure according to the invention can be such that the charge is mechanically agitated in the reactor and, in particular, circulated by rotation of the reactor, earths, soils, rocks or minerals with a low calorific calorific value preferably being used as charge with carbon carriers.
  • the temperature level in the additional reactor in which the carbonaceous contaminated batches are pretreated can be kept relatively low, since it does not depend on the combustion.
  • the calorific value of the contaminated batches is usually too low. Rather, it is important in the invention to keep the temperature low enough to avoid caking and temperature peaks caused by local burns with certainty.
  • the process according to the invention is carried out in this case so that the batch is discharged at temperatures of about 800 ° C.
  • 1 denotes a rotary kiln for clinker production, which raw meal is fed via a line 2.
  • the raw meal is mixed in a suspended gas scher warmed with cyclones 3 or calcined, the hot gases of the clinker furnace are fed via line 4 this Schwebegas139 (2004).
  • the clinker leaving the rotary kiln 1 passes into a clinker cooler 5.
  • the tertiary air withdrawn from the clinker cooler 5 returns via a first line 6 to the preheating or precalcining stage and thus to the suspended gas heat exchanger (cyclones 3), a subset via the line 7 a another rotary drum reactor 8 is supplied.
  • This further rotary drum reactor 8 now has a large number of feed devices, wherein via the line 9 fresh air, via the line 10 water or water vapor, via the line 11 with Kohlenstoffträgem contaminated charge and the line 12 optionally further fuel to stabilize the temperature distribution can be supplied in the reactor 8.
  • the hot process gases can be circulated through the ring line 13 v, in which case only a subset is recycled and surplus hot gases are withdrawn via line 14 and can be fed to the floating gas heat exchangers. Finally, via the line 15, the pretreated batches are discharged.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

L'invention concerne un procédé de prétraitement de charges contaminées avec des porteurs de carbone, par exemple avec de la terre, des sols, des pierres ou des minéraux contaminés avec des porteurs de carbone, ayant une faible valeur calorifique, pour une utilisation dans des clinkers de fourneaux. Selon ce procédé, lesdites charges sont introduites dans un réacteur (8) et chauffées et séchées avec un gaz. Le gaz chauffé est retiré à une température inférieure à 1 250 °C, de préférence 700-900 °C et les charges chauffées et séchées sont séparément déchargées à une température de 500 °C à 1 000 °C. Selon l'invention, la température est ajustée et maintenue dans le réacteur (8) par régulation de l'introduction d'air frais, d'eau ou de vapeur d'eau, par régulation du débit d'introduction des charges et/ou des gaz du procédé, tels que par exemple de l'air ternaire, ou si nécessaire par combustion d'un combustible pour stabiliser la distribution de température. Le gaz retiré du réacteur (8) est au moins en partie recirculé dans le réacteur (8) et/ou dirigé vers une étape de précalcination et/ou de préchauffage du clinker de fourneau (1).
EP07825071A 2006-09-14 2007-09-07 Procédé de prétraitement de charges contaminées avec des porteurs de carbone Withdrawn EP2061730A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0153306A AT504193B1 (de) 2006-09-14 2006-09-14 Verfahren zum vorbehandeln von mit kohlenstoffträgern kontaminierten chargen
PCT/IB2007/002574 WO2008032160A2 (fr) 2006-09-14 2007-09-07 Procédé de prétraitement de charges contaminées avec des porteurs de carbone

Publications (1)

Publication Number Publication Date
EP2061730A2 true EP2061730A2 (fr) 2009-05-27

Family

ID=39154278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07825071A Withdrawn EP2061730A2 (fr) 2006-09-14 2007-09-07 Procédé de prétraitement de charges contaminées avec des porteurs de carbone

Country Status (12)

Country Link
US (1) US20100095873A1 (fr)
EP (1) EP2061730A2 (fr)
CN (1) CN101535205A (fr)
AT (1) AT504193B1 (fr)
AU (1) AU2007297289B2 (fr)
BR (1) BRPI0716806A2 (fr)
CA (1) CA2663617C (fr)
CO (1) CO6170354A2 (fr)
MX (1) MX2009002767A (fr)
NZ (1) NZ576104A (fr)
RU (1) RU2009113826A (fr)
WO (1) WO2008032160A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010067223A1 (fr) * 2008-12-11 2010-06-17 Flsmidth A/S Procédé et installation de traitement thermique de matières premières
WO2010124702A1 (fr) * 2009-04-30 2010-11-04 Schwenk Zement Kg Procédé et dispositif pour la préparation du combustible dans un processus de cuisson de clinkers
WO2012042418A1 (fr) * 2010-09-28 2012-04-05 Flsmidth A/S Procédé de fabrication de clinker de ciment

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK149735C (da) * 1975-10-30 1987-02-16 Ass Portland Cement Fremgangsmaade til calcinering af mineraler
DE3218232A1 (de) * 1982-05-14 1984-02-09 Quittkat, Wolfram G., Dr.-Ing., 8183 Rottach-Egern Verfahren zum brennen von karbonatischen rohstoffen
DE3320670A1 (de) * 1983-06-08 1984-12-13 Wolfram G. Dr.-Ing. 8183 Rottach-Egern Quittkat Verfahren und vorrichtung zur herstellung von bindemitteln unter verwendung heizwerthaltiger ausgangsstoffe
DE3533775A1 (de) * 1985-09-21 1987-03-26 Dyckerhoff Eng Gmbh Verfahren und vorrichtung zur verwertung heizwerthaltiger abfallstoffe in verbindung mit der herstellung von bindemitteln
DE3616771A1 (de) * 1986-05-17 1987-11-19 Kloeckner Humboldt Deutz Ag Verschwelung brennstoffhaltiger rohmehle bei der klinkerherstellung
DE3803170A1 (de) * 1988-02-03 1989-08-17 Krupp Polysius Ag Vorrichtung und anlage zur herstellung von zementklinker
DE4208977C1 (fr) * 1992-03-20 1993-07-15 Metallgesellschaft Ag, 6000 Frankfurt, De
DE19535312A1 (de) * 1995-09-22 1997-03-27 Krupp Polysius Ag Anlage und Verfahren zur Herstellung von Zementklinker
JP3838591B2 (ja) * 1996-02-27 2006-10-25 株式会社荏原製作所 セメント製造装置と製造方法
DE19608093C2 (de) * 1996-03-02 2000-08-10 Krc Umwelttechnik Gmbh Verfahren zur Verwertung von Rest- und Abfallstoffen sowie heizwertarmen Brennstoffen in einem Zementofen
DE10121773A1 (de) * 2001-05-04 2002-11-07 Krupp Polysius Ag Anlage und Verfahren zur Herstellung von Zementklinker
DE10202776A1 (de) * 2002-01-25 2003-07-31 Kloeckner Humboldt Wedag Anlage zur Herstellung von Zementklinker
US20060147853A1 (en) * 2005-01-06 2006-07-06 Lipp Charles W Feed nozzle assembly and burner apparatus for gas/liquid reactions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20100095873A1 (en) 2010-04-22
WO2008032160A3 (fr) 2008-07-17
AU2007297289A1 (en) 2008-03-20
AT504193B1 (de) 2008-06-15
NZ576104A (en) 2012-07-27
WO2008032160A2 (fr) 2008-03-20
CO6170354A2 (es) 2010-06-18
AU2007297289B2 (en) 2012-08-30
MX2009002767A (es) 2009-08-13
RU2009113826A (ru) 2010-10-20
AT504193A1 (de) 2008-03-15
CN101535205A (zh) 2009-09-16
BRPI0716806A2 (pt) 2014-04-08
CA2663617A1 (fr) 2008-03-20
CA2663617C (fr) 2015-02-17

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