WO2003076355A1 - Procede de traitement thermique de concentres aqueux - Google Patents

Procede de traitement thermique de concentres aqueux Download PDF

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Publication number
WO2003076355A1
WO2003076355A1 PCT/AT2003/000070 AT0300070W WO03076355A1 WO 2003076355 A1 WO2003076355 A1 WO 2003076355A1 AT 0300070 W AT0300070 W AT 0300070W WO 03076355 A1 WO03076355 A1 WO 03076355A1
Authority
WO
WIPO (PCT)
Prior art keywords
aqueous concentrates
aqueous
industrial production
thermal treatment
waste
Prior art date
Application number
PCT/AT2003/000070
Other languages
German (de)
English (en)
Inventor
Franz Neubacher
Peter Ernst
Hans-Jürgen GULAS
Michael SCHÖFFEL
Original Assignee
Uv & P Umweltmanagement - Verfahrenstechnik Neubache R & Partner Ges.M.B.H.
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 Uv & P Umweltmanagement - Verfahrenstechnik Neubache R & Partner Ges.M.B.H. filed Critical Uv & P Umweltmanagement - Verfahrenstechnik Neubache R & Partner Ges.M.B.H.
Priority to AU2003218514A priority Critical patent/AU2003218514A1/en
Priority to EP03711697A priority patent/EP1487755A1/fr
Publication of WO2003076355A1 publication Critical patent/WO2003076355A1/fr

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Definitions

  • the invention relates to a method for the thermal treatment of aqueous concentrates, in particular of concentrated landfill water and aqueous waste from waste treatment plants and from industrial production or cleaning processes.
  • a rotary kiln for the treatment of industrial waste has become known from JP 62-49419 A2, which essentially consists of a front combustion chamber with a smaller diameter and a rear combustion chamber with a larger diameter, with pipelines extending from the front of the rotary kiln in the wall the front combustion chamber are provided which open into the combustion chamber in a conical transition region.
  • water and compressed air can be introduced into the combustion chamber in order to increase the efficiency of the combustion and furthermore to cool the walls of the combustion chamber in order to prevent the thermally treated material from contacting the combustion chamber walls.
  • a nozzle is provided with which water can be injected into the front combustion chamber together with compressed air.
  • a method for reducing NO x in the cement clinker burning process has become known from DE 198 02 247 A1, in which a 0-10% aqueous solution of ammonia or ammonium compounds is fed to the primary firing via the secondary air.
  • the aim of the process is to avoid temperature peaks in the combustion air of a rotary kiln, the NH X radicals in the rotary kiln flame leading to NO decomposition and furthermore the dissociation of the H 2 O leads to a cooling of the rotary kiln flame.
  • DE 26 24 971 AI discloses a process for recycling industrial waste in combustion processes for the production of alkaline earth oxides, alkaline earth silicates or alkaline earth aluminates, in which the waste is introduced in such a way that the combustible material absorbs the inorganic constituents of the waste.
  • a rotary kiln system is used for the firing process, the waste being brought into contact with the firing material at the end of the firing process, the inorganic constituents being chemically bound by the firing material.
  • the operation of landfills and waste treatment plants, in particular landfills leads to the accumulation of contaminated leachate, for the treatment of which mostly processes are used to concentrate the pollutants, for example processes or process combinations such as reverse osmosis, membrane filtration or evaporation.
  • the resulting aqueous concentrate is characterized by high levels of pollutants, in particular by organic substances that are difficult to biodegrade.
  • pollutants in particular by organic substances that are difficult to biodegrade.
  • Known processes for their treatment are primarily chemical (use of chemical oxidizing agents) or thermal oxidation (combustion in special systems with downstream exhaust gas cleaning), the operation of which requires a high consumption of energy and chemicals and leads to residues, which are generally considered dangerous Waste is further processed or disposed of in underground landfills.
  • the object of the invention is to improve a method for the thermal treatment of aqueous concentrates in such a way that the use of energy is minimized and the problem of storage or removal of the non-combustible inorganic residues is solved.
  • aqueous concentrates for regulating the flame temperature are introduced into the high-temperature furnace of an industrial production process.
  • the aqueous concentrates can be used particularly advantageously in the production of cement clinker or in the production of fire lime.
  • nitrogen oxide emissions Due to progressively stricter environmental protection requirements, nitrogen oxide emissions have become a particular problem, for example for cement clinker production and other high-temperature furnaces.
  • the ozone law (BGBI 1992/2010) in Austria requires a 70% reduction in nitrogen oxide emissions by December 31, 2006 based on the emissions in 1985.
  • the nitrogen oxide emission is already limited to 800 mg / m 3 , with a further reduction to 500 mg / m 3 already being provided.
  • the amount of the aqueous concentrates introduced into the high-temperature furnace is regulated as a function of the flame temperature, the nitrogen oxide emission or a size dependent thereon.
  • the measure according to the invention can be used to reduce the thermally induced formation of nitrogen oxides by targeted flame cooling.
  • the increased fuel consumption due to the injection of the aqueous concentrates can be partly reduced or compensated for by combustible components in the aqueous concentrates.
  • Another advantage of the invention is that the inorganic residues of the aqueous concentrates obtained after the thermal treatment are chemically or physically integrated or immobilized in the product of the industrial production process.
  • the controlled use of aqueous concentrates in high-temperature furnaces in industrial production processes enables them to be recycled in an environmentally compatible manner, whereby in addition to the regulated cooling of the high-temperature furnaces, residue-free waste recycling and a reduction in air pollutant emissions are also guaranteed.
  • Leachate concentrates from waste landfills and waste water from waste treatment plants (for example fermentation or composting plants) loaded with organic pollutants and nitrogen compounds can be used particularly advantageously in the main firing of cement kilns.
  • the organic pollutants are completely broken down and used for energy, while the inorganic components of the aqueous concentrates, such as heavy metals, sulfur and alkalis, are not or only slightly soluble in the matrix of the cement clinker.
  • the content of soluble components such as mercury in the aqueous concentrates must be kept low in accordance with the emission limit values.
  • Typical consumption values for the controlled recycling of aqueous concentrates are around 1 to 10 m 3 based on a production output of around 1000 t of cement clinker.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention concerne un procédé de traitement thermique de concentrés aqueux, en particulier d'eaux de décharge concentrées et de déchets aqueux provenant d'usines de traitement des déchets et de processus de production ou de nettoyage industriels. Selon ladite invention, ces concentrés aqueux sont introduits dans le foyer à haute température d'un processus de production industriel, par exemple lors de la fabrication de clinker, afin de réguler la température des flammes, les résidus inorganiques étant chimiquement ou physiquement liés dans le produit du processus de production industriel.
PCT/AT2003/000070 2002-03-14 2003-03-11 Procede de traitement thermique de concentres aqueux WO2003076355A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003218514A AU2003218514A1 (en) 2002-03-14 2003-03-11 Method for the thermal treatment of aqueous concentrates
EP03711697A EP1487755A1 (fr) 2002-03-14 2003-03-11 Procede de traitement thermique de concentres aqueux

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM158/2002 2002-03-14
AT0015802U AT5764U1 (de) 2002-03-14 2002-03-14 Verfahren zur thermischen behandlung von wässrigen konzentraten

Publications (1)

Publication Number Publication Date
WO2003076355A1 true WO2003076355A1 (fr) 2003-09-18

Family

ID=3483067

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2003/000070 WO2003076355A1 (fr) 2002-03-14 2003-03-11 Procede de traitement thermique de concentres aqueux

Country Status (4)

Country Link
EP (1) EP1487755A1 (fr)
AT (1) AT5764U1 (fr)
AU (1) AU2003218514A1 (fr)
WO (1) WO2003076355A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011001773A1 (de) * 2011-04-04 2012-10-04 Thyssenkrupp Polysius Ag Verfahren und Anlage zur Herstellung von Zementklinker

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2624971A1 (de) 1976-06-03 1977-12-15 Dyckerhoff Zementwerke Ag Verfahren zur verwertung industrieller abfaelle
JPS6249419A (ja) 1985-08-28 1987-03-04 Kuukou Motor Service Kk 不凍液濃度自動制御方式
EP0382673A2 (fr) * 1989-02-07 1990-08-16 F.L. Smidth & Co. A/S Procédé et dispositif de combustion simultanée des déchets dangereux dans des fours rotatifs industriels
WO1995025075A1 (fr) * 1994-03-16 1995-09-21 Cement Industry Environmental Consortium Procede et dispositif de regulation des emissions polluantes a l'occasion des operations de combustion
US5632616A (en) * 1994-11-28 1997-05-27 Cadence Environmental Energy, Inc. Method and apparatus for injecting air into long cement kilns
DE19802247A1 (de) 1998-01-22 1999-07-29 Heidelberger Zement Ag Verfahren zur Minderung von NOx im Zementklinkerbrennprozeß

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2624971A1 (de) 1976-06-03 1977-12-15 Dyckerhoff Zementwerke Ag Verfahren zur verwertung industrieller abfaelle
JPS6249419A (ja) 1985-08-28 1987-03-04 Kuukou Motor Service Kk 不凍液濃度自動制御方式
EP0382673A2 (fr) * 1989-02-07 1990-08-16 F.L. Smidth & Co. A/S Procédé et dispositif de combustion simultanée des déchets dangereux dans des fours rotatifs industriels
WO1995025075A1 (fr) * 1994-03-16 1995-09-21 Cement Industry Environmental Consortium Procede et dispositif de regulation des emissions polluantes a l'occasion des operations de combustion
US5632616A (en) * 1994-11-28 1997-05-27 Cadence Environmental Energy, Inc. Method and apparatus for injecting air into long cement kilns
DE19802247A1 (de) 1998-01-22 1999-07-29 Heidelberger Zement Ag Verfahren zur Minderung von NOx im Zementklinkerbrennprozeß

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011001773A1 (de) * 2011-04-04 2012-10-04 Thyssenkrupp Polysius Ag Verfahren und Anlage zur Herstellung von Zementklinker
DE102011001773B4 (de) * 2011-04-04 2013-01-24 Thyssenkrupp Polysius Ag Verfahren und Anlage zur Herstellung von Zementklinker
US9067827B2 (en) 2011-04-04 2015-06-30 Thyssenkrupp Industrial Solutions Ag Method and installation for producing cement clinker

Also Published As

Publication number Publication date
EP1487755A1 (fr) 2004-12-22
AU2003218514A1 (en) 2003-09-22
AT5764U1 (de) 2002-11-25

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