EP0158587A2 - Process for lowering the emission of pollutants in combustion units - Google Patents

Process for lowering the emission of pollutants in combustion units Download PDF

Info

Publication number
EP0158587A2
EP0158587A2 EP85730045A EP85730045A EP0158587A2 EP 0158587 A2 EP0158587 A2 EP 0158587A2 EP 85730045 A EP85730045 A EP 85730045A EP 85730045 A EP85730045 A EP 85730045A EP 0158587 A2 EP0158587 A2 EP 0158587A2
Authority
EP
European Patent Office
Prior art keywords
coal
additive
added
suspension
sulfur
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
EP85730045A
Other languages
German (de)
French (fr)
Other versions
EP0158587B1 (en
EP0158587A3 (en
Inventor
Heinz Dr.-Ing. Gaessler
Helmut Dipl.-Phys. Landgraf
Klaus-Dieter Dipl.-Ing. Rennert
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.)
Vodafone GmbH
Hitachi Zosen Inova Steinmueller GmbH
Original Assignee
L&C Steinmueller GmbH
Mannesmann AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25741428&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0158587(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by L&C Steinmueller GmbH, Mannesmann AG filed Critical L&C Steinmueller GmbH
Publication of EP0158587A2 publication Critical patent/EP0158587A2/en
Publication of EP0158587A3 publication Critical patent/EP0158587A3/en
Application granted granted Critical
Publication of EP0158587B1 publication Critical patent/EP0158587B1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
    • C10L1/326—Coal-water suspensions

Definitions

  • the invention relates to a method for reducing pollutant emissions, in particular for desulfurization, in the combustion of coal, in particular hard coal, which as a coal / water suspension over long distances in a pipeline to a combustion system, e.g. to a power plant that was transported.
  • WO 83/00 500 discloses a coal fuel in the form of a highly concentrated coal / water suspension (60-80% by weight of coal) which is directly suitable for firing in the burners of a furnace.
  • a suspension is pumpable, but its high viscosity is a technical obstacle to long-distance transportation in a pipeline. This problem is not dealt with in the cited document.
  • the object of the invention is therefore to provide a method which, with as little effort as possible, leads to a reduction in pollutant emissions during the combustion of sulfur-containing coal, in particular hard coal, which is transported in the form of a coal / water suspension in a pipeline to the furnace.
  • coal is fed to the burner of the firing system in the form of a coal / water suspension with at least 55% by weight of coal content
  • this suspension can be burned immediately without the need for prior separation of the water content.
  • the water content in turn leads to a significant reduction in the peak temperatures during combustion compared to dry coal dust combustion. This significantly limits the formation of nitrogen oxides.
  • the lower combustion temperatures and the liquid-like atomization of the suspension create the prerequisite that oxidized sulfur can be chemically bound by the additives added to the suspension during the combustion, so that the SO 2 content remaining in the flue gas is decisively reduced.
  • limestone which has advantageously been milled to a grain size of less than 90 ⁇ m, or calcium hydroxide (Ca (OH) 2 ) can be added as additives.
  • Calcium salts are also used with particular advantage as additives, in particular those which lead to a reduction in the viscosity of the coal suspension (e.g. calcium lignin sulfate) or which reduce corrosion in steel pipelines.
  • these additives are not only effective in terms of pollutant emissions during combustion, but also have advantages for pipeline transport. This presupposes that they are added at least during the pipeline transport, but advantageously before the transport. In the latter case, this can e.g. happen during the grinding of the coal in the preparation of the suspension, in which case there is even no need for a special mixing unit. Of course, it is also possible to add the additive just before the burner.
  • the degree of concentration of the suspension with at least 55% by weight of coal does not necessarily have to be so high during the pipeline transport; it is also possible to initially transport the coal in a coarser grain and with a lower degree of concentration and to provide additional preparation before combustion, the coal being ground more finely and part of the water being separated from the suspension.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Incineration Of Waste (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Treating Waste Gases (AREA)

Abstract

1. Method to reduce the emission of harmful substances, in particular for desulphurization, in the combustion of sulphurous coal which is transported as a coa/water suspension containing a coal component of more than 55 %-wt. over lengthy distances in a pipe line to the firing installation, in particular mineral coal, characterized in that a sulphur-bonding additive is added to the coal/water suspension in twice as great a quantity as would be necessary purely stoichiometrically on the basis of the sulphur content of the coal for the complete sulphur bond and the suspension is passed to the burner of the firing installation.

Description

Die Erfindung betrifft ein Verfahren zur Verminderung der Schadstoffemission, insbesondere zur Entschwefelung, bei der Verbrennung von Kohle, insbesondere Steinkohle, die als Kohle/Wasser-Suspension über größere Entfernungen in einer Rohrleitung zu einer Feuerungsanlage, z.B. zu einem Kraftwerk, transportiert wurde.The invention relates to a method for reducing pollutant emissions, in particular for desulfurization, in the combustion of coal, in particular hard coal, which as a coal / water suspension over long distances in a pipeline to a combustion system, e.g. to a power plant that was transported.

Es ist bekannt, fein gemahlene Kohle in Form einer Kohle/Wasser-Suspension von einer Kohlelagerstätte über größere Entfernungen (z.B. 440 km) zu einem Kohleverbrauchszentrum zu transportieren. Vor der Verbrennung in Form von Kohlestaub in der Feuerungsanlage eines Kraftwerkes wird der Wasseranteil der Suspension unter erheblichem Aufwand weitestgehend abgetrennt (z.B. Fister: Coal Slurry Systems - a viabel transport alternative, CIM Bulletin, December 1982, Seite 71 - 76).It is known to transport finely ground coal in the form of a coal / water suspension from a coal deposit over long distances (e.g. 440 km) to a coal consumption center. Before combustion in the form of coal dust in the firing system of a power plant, the water content of the suspension is largely separated with considerable effort (e.g. Fister: Coal Slurry Systems - a viabel transport alternative, CIM Bulletin, December 1982, pages 71 - 76).

Weiterhin ist z.B. aus WO 83/00 500 ein Kohlebrennstoff in Form einer hochkonzentrierten Kohle/Wasser-Suspension (60 - 80 Gew.-% Kohleanteil) bekannt, die sich unmittelbar zur Verfeuerung in den Brennern einer Feuerungsanlage eignet. Eine solche Suspension ist zwar pumpfähig, ihre hohe Viskosität ist jedoch ein technisches Hindernis für den Ferntransport in einer Rohrleitung. Dieses Problem wird in der genannten Schrift nicht näher behandelt.Furthermore, e.g. WO 83/00 500 discloses a coal fuel in the form of a highly concentrated coal / water suspension (60-80% by weight of coal) which is directly suitable for firing in the burners of a furnace. Such a suspension is pumpable, but its high viscosity is a technical obstacle to long-distance transportation in a pipeline. This problem is not dealt with in the cited document.

Schließlich sind zur Verminderung der bei der Verbrennung von Kohle entstehenden Schadstoffemission zahlreiche Verfahren und Vorrichtungen bekannt. In erster Linie richten sich die Bemühungen auf eine Verminderung der Gehalte an SOJ und NOx. Die meisten Vorschläge beziehen sich auf eine Reinigung der Rauchgase nach der Verbrennung der Kohle. Es ist aber auch bekannt, Additive, die Schadstoffe wie z.B. Schwefel abbinden, bereits während der Verbrennung zuzuführen. Dies kann dadurch geschehen, daß die Additive dem Brennstoff unmittelbar zugegeben werden, wobei jedoch ein Anteil des zugegebenen Additivs durch die zu erwartenden hohen Verbrennungstemperaturen "totgebrannt" wird.Finally, numerous methods and devices are known for reducing the pollutant emissions resulting from the combustion of coal. Efforts are primarily aimed at reducing SO J and NO x levels. Most of the proposals relate to cleaning the flue gases after burning the coal. However, it is also known to add additives which bind pollutants such as sulfur as early as during the combustion. This can be done by adding the additives directly to the fuel, but a portion of the added additive is "burnt to death" by the high combustion temperatures to be expected.

Eine andere Möglichkeit der Additivzugabe zur Senkung der Schwefelemission wurde daher in der DE-OS 31 06 580 vorgeschlagen, bei der das Additiv mit Hilfe eines Trägermittelstromes unter Bildung eines die Brennerflamme umgebenden Schleiers dem Feuerraum zugegeben wird. In diesem Mischungsbereich Ist die Verbrennung bereits soweit fortgeschritten und die Flammentemeraturen bereits soweit abgesenkt, daß die Mischung des Additives mit den Rauchgasen in einem für die Reaktion optimalen Temperaturbereich ablaufen kann. Die Zugabe des Additives mittels eines Trägermediums erfordert jedoch einen erheblichen apparativen Aufwand. Ebenfalls wird über die Verbrennung von Kohle/Wasser-Suspensionen in dieser Schrift nichts ausgesagt.Another way of adding additives to reduce sulfur emissions was therefore proposed in DE-OS 31 06 580, in which the additive is added to the combustion chamber with the aid of a flow of carrier medium to form a veil surrounding the burner flame. In this mixing range, the combustion has already progressed so far and the flame temperature has been lowered that the mixing of the additive with the flue gases can take place in a temperature range that is optimal for the reaction. However, the addition of the additive by means of a carrier medium requires a considerable outlay on equipment. Nothing is said in this document either about the combustion of coal / water suspensions.

Aufgabe der Erfindung ist es daher, ein Verfahren anzugeben, das bei möglichst geringem Aufwand zu einer Verminderung der Schadstoffemission bei der Verbrennung schwefelhaltiger Kohle, insbesondere Steinkohle, führt, die in Form einer Kohle/Wasser-Suspension in einer Rohrleitung zur Feuerungsanlage transportiert wird.The object of the invention is therefore to provide a method which, with as little effort as possible, leads to a reduction in pollutant emissions during the combustion of sulfur-containing coal, in particular hard coal, which is transported in the form of a coal / water suspension in a pipeline to the furnace.

Gelöst wird diese Aufgabe erfindungsgemäß durch die Merkmale des Patentanspruchs 1. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen 2 - 10 angegeben.This object is achieved according to the invention by the features of patent claim 1. Advantageous further developments of the invention are specified in subclaims 2-10.

Dadurch, daß die Kohle dem Brenner der Feuerungsanlage in Form einer Kohle/Wasser-Suspension mit mindestens 55 Gew.-% Kohleanteil zugeführt wird, wird erreicht, daß diese Suspension unmittelbar verbrannt werden kann onne die Notwendigkeit einer vorhergehenden Abscheidung des Wasseranteils. Der Wassergehalt seinerseits führt zu einer deutlichen Verminderung der bei der Verbrennung entstehenden Spitzentemperaturen gegenüber einer trockenen Kohlestaubfeuerung. Hierdurch wird die Entstehung von Stickoxiden wesentlich eingeschränkt. Weiterhin wird durch die abgesenkten Verbrennungstemperaturen und die flüssigkeitsähnliche Zerstäubung der Suspension die Voraussetzung geschaffen, daß während der Verbrennung oxidierter Schwefel durch die der Suspension zugegebenen Additive chemisch gebunden werden kann, so daß der im Rauchgas noch verbleibende Gehalt an SO2 entscheidend vermindert wird.The fact that the coal is fed to the burner of the firing system in the form of a coal / water suspension with at least 55% by weight of coal content means that this suspension can be burned immediately without the need for prior separation of the water content. The water content in turn leads to a significant reduction in the peak temperatures during combustion compared to dry coal dust combustion. This significantly limits the formation of nitrogen oxides. Furthermore, the lower combustion temperatures and the liquid-like atomization of the suspension create the prerequisite that oxidized sulfur can be chemically bound by the additives added to the suspension during the combustion, so that the SO 2 content remaining in the flue gas is decisively reduced.

Als Additive können in Weiterbildung der Erfindung Kalkstein (CaC03), welcher vorteilhaft auf eine Korngröße unter 90 um vermahlen worden ist, oder auch Calciumhydroxid (Ca(OH)2) zugesetzt werden.In a further development of the invention, limestone (CaC0 3 ), which has advantageously been milled to a grain size of less than 90 μm, or calcium hydroxide (Ca (OH) 2 ) can be added as additives.

Mit besonderem Vorteil werden als Additive auch Calcium-Salze verwendet und zwar insbesondere solche, die zu einer Verminderung der Viskosität der Kohlesuspension führen (z.B. Calcium-Lignin-Sulfat) oder die die Korrosion in Stahlrohrleitungen vermindern. Das bedeutet, daß diese Additive nicht nur bei der Verbrennung in Bezug auf die Schadstoffemission wirksam werden, sondern bereits für den Rohrleitungstransport Vorteile mit sich bringen. Dies setzt voraus, daß sie zumindest während des Rohrleitungstransports, vorteilhaft jedoch bereits vor dem Transport zugesetzt werden. In letzterem Fall kann dies z.B. während der Vermahlung der Kohle bei der Vorbereitung der Suspension geschehen, wobei sich dann sogar ein besonderes Mischaggregat erübrigt. Selbstverständlich ist es auch möglich, das Additiv erst kurz vor dem Brenner zuzusetzen. Der Konzentrationsgrad der Suspension mit mindestens 55 Gew.-% Kohleanteil muß nicht unbedingt während des Rohrleitungstransports schon so hoch sein; es ist auch möglich, die Kohle zunächst grobkörniger und mit geringerem Konzentrationsgrad zu transportieren und eine zusätzliche Aufbereitung vor der Verbrennung vorzusehen, wobei die Kohle feiner aufgemahlen wird und ein Teil des Wassers aus der Suspension abgetrennt wird.Calcium salts are also used with particular advantage as additives, in particular those which lead to a reduction in the viscosity of the coal suspension (e.g. calcium lignin sulfate) or which reduce corrosion in steel pipelines. This means that these additives are not only effective in terms of pollutant emissions during combustion, but also have advantages for pipeline transport. This presupposes that they are added at least during the pipeline transport, but advantageously before the transport. In the latter case, this can e.g. happen during the grinding of the coal in the preparation of the suspension, in which case there is even no need for a special mixing unit. Of course, it is also possible to add the additive just before the burner. The degree of concentration of the suspension with at least 55% by weight of coal does not necessarily have to be so high during the pipeline transport; it is also possible to initially transport the coal in a coarser grain and with a lower degree of concentration and to provide additional preparation before combustion, the coal being ground more finely and part of the water being separated from the suspension.

Um die verschiedenen Vorteile einzelner schwefelbindender Substanzen in Kombination nutzen zu können, werden als Additiv entsprechende Mischungen dieser Substanzen der Suspension zugesetzt. Schließlich ist noch darauf hinzuweisen, daß es für eine effektive Schadstoffminimierung in vielen Fällen vorteilhaft ist, das Additiv in einer doppelt so großen Menge zuzusetzen, wie rein stöchiometrisch zur vollständigen Abbindung des Schwefelgehaltes erforderlich wäre. Die Qualität, bzw. die Deponiefähigkeit der beim Verbrennungsprozeß erzeugten Asche ist durch den Additivzusatz nicht beeinträchtigt.In order to be able to use the various advantages of individual sulfur-binding substances in combination, appropriate mixtures of these substances are added to the suspension as an additive. Finally, it should also be pointed out that for effective pollutant minimization it is advantageous in many cases to add the additive in an amount twice as high as would be required purely stoichiometrically for the complete setting of the sulfur content. The additive additive does not impair the quality or the landfill capability of the ashes produced during the combustion process.

Claims (10)

1. Verfahren zur Verminderung der Schadstoffemission, insbesondere zur Entschwefelung, bei der Verbrennung von als Kohle/Wasser-Suspension über größere Entfernungen in einer Rohrleitung zur Feuerungsanlage transportierter, schwefelhaltiger Kohle, insbesondere Steinkohle, dadurch gekennzeichnet daß der Kohle-Wasser-Suspension ein schwefelbindendes Additiv zugesetzt wird und die mehr als 55 Gew.-% Kohleanteil enthaltende Suspension dem Brenner der Feuerungsanlage zugeführt wird.1. A process for reducing pollutant emissions, in particular for desulfurization, in the combustion of sulfur-containing coal, in particular hard coal, which is transported as a coal / water suspension over greater distances in a pipeline to the furnace, characterized in that the coal-water suspension is a sulfur-binding additive is added and the suspension containing more than 55% by weight of coal is fed to the burner of the furnace. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Kalkstein (CaC03) enthaltendes Additiv zugesetzt wird.2. The method according to claim 1, characterized in that a limestone (CaC0 3 ) containing additive is added. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Kalkstein vor dem Zusetzen auf eine Korngröße unter 90 µm gemahlen wird.3. The method according to claim 2, characterized in that the limestone is ground to a grain size below 90 microns before adding. 4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Kalkstein zusammen mit der Rohkohle in einer Naßvermahlung auf die erforderliche Korngröße zerkleinert wird.4. The method according to claim 2 or 3, characterized in that the limestone is crushed together with the raw coal in a wet grinding to the required grain size. 5. Verfahren nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, daß ein Calciumhydroxid (Ca(OH)2) enthaltendes Additiv zugesetzt wird.5. The method according to any one of claims 1-3, characterized in that a calcium hydroxide (Ca (OH) 2 ) containing additive is added. 6. Verfahren nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, daß ein Additiv, das ein die Viskosität der Suspension verminderndes Calcium-Salz enthält, zugesetzt wird.6. The method according to any one of claims 1-4, characterized in that an additive containing a calcium salt reducing the viscosity of the suspension is added. 7. Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß ein Additiv, das ein die Korrosion in der für den Transport benutzten Stahlrohrleitung verminderndes Calcium-Salz enthält, zugesetzt wird.7. The method according to any one of claims 1-5, characterized in that an additive containing a calcium salt reducing the corrosion in the steel pipeline used for the transport is added. 8. Verfahren nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, daß als Additiv ein Gemisch aus verschiedenen, den Schwefel bindenden Stoffen zugesetzt wird.8. The method according to any one of claims 1-6, characterized in that a mixture of different, the sulfur-binding substances is added as an additive. 9. Verfahren nach einem der Ansprüche 1 - 7, dadurch gekennzeichnet, daß das Additiv in einer doppelt so großen Menge zugesetzt, wie rein stöchiometrisch aufgrund des Schwefelgehaltes der Kohle für die vollständige Schwefelbindung erforderlich wäre.9. The method according to any one of claims 1-7, characterized in that the additive is added in a quantity twice as large as would be required purely stoichiometrically due to the sulfur content of the coal for the complete sulfur binding. 10. Verfahren nach einem der Ansprüche 1 - 8, dadurch gekennzeichnet, daß das Additiv vor Beginn des Rohrleitungstransports zugesetzt wird.10. The method according to any one of claims 1-8, characterized in that the additive is added before the start of the pipeline transport.
EP85730045A 1984-04-10 1985-03-28 Process for lowering the emission of pollutants in combustion units Expired EP0158587B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3413831 1984-04-10
DE19843413831 DE3413831A1 (en) 1984-04-10 1984-04-10 METHOD FOR REDUCING POLLUTANT EMISSION IN COMBUSTION PLANTS
CN85101468A CN85101468B (en) 1984-04-10 1985-04-01 Reduce the method for harmful materials in the combustion equipment

Publications (3)

Publication Number Publication Date
EP0158587A2 true EP0158587A2 (en) 1985-10-16
EP0158587A3 EP0158587A3 (en) 1986-02-05
EP0158587B1 EP0158587B1 (en) 1987-09-09

Family

ID=25741428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730045A Expired EP0158587B1 (en) 1984-04-10 1985-03-28 Process for lowering the emission of pollutants in combustion units

Country Status (5)

Country Link
EP (1) EP0158587B1 (en)
CN (1) CN85101468B (en)
DE (2) DE3413831A1 (en)
IN (1) IN164291B (en)
SU (1) SU1403995A3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804834A1 (en) * 1987-02-17 1988-08-25 Intevep Sa METHOD FOR PRODUCING OR BURNING A FUEL AND HYDROCARBON FUEL THEREFOR
EP0325309A1 (en) * 1988-01-21 1989-07-26 SNAMPROGETTI S.p.A. Method for preparing a high-concentration solids suspension in water

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421313C2 (en) * 1994-06-17 1996-08-14 Lausitzer Braunkohle Ag Additive for reducing the pollution of the air during the combustion of lignite
PT1872054T (en) * 2005-03-17 2018-12-14 Nox Ii Int Ltd Reducing mercury emissions from the burning of coal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2235860A1 (en) * 1973-07-05 1975-01-31 Marathon Oil Co
WO1985000377A1 (en) * 1983-07-14 1985-01-31 Ab Carbogel A composition and a method of capturing sulphur

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2235860A1 (en) * 1973-07-05 1975-01-31 Marathon Oil Co
WO1985000377A1 (en) * 1983-07-14 1985-01-31 Ab Carbogel A composition and a method of capturing sulphur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804834A1 (en) * 1987-02-17 1988-08-25 Intevep Sa METHOD FOR PRODUCING OR BURNING A FUEL AND HYDROCARBON FUEL THEREFOR
EP0325309A1 (en) * 1988-01-21 1989-07-26 SNAMPROGETTI S.p.A. Method for preparing a high-concentration solids suspension in water

Also Published As

Publication number Publication date
IN164291B (en) 1989-02-11
CN85101468A (en) 1987-01-10
SU1403995A3 (en) 1988-06-15
DE3560587D1 (en) 1987-10-15
CN85101468B (en) 1988-03-16
EP0158587B1 (en) 1987-09-09
EP0158587A3 (en) 1986-02-05
DE3413831A1 (en) 1985-10-17

Similar Documents

Publication Publication Date Title
US4555392A (en) Portland cement for SO2 control in coal-fired power plants
DE3607929C2 (en)
DE3232081A1 (en) ABSORBENT FOR DRY REMOVAL OF SULFUR DIOXIDE FROM SMOKE GASES
DE3232078A1 (en) USE OF THE RESIDUAL SOLIDS OF THE DRY FUME DESULFURATION AS A BUILDING MATERIAL
DD223074A5 (en) METHOD AND APPARATUS FOR REMOVING SULFUR DIOXIDE AND OTHER CONTAMINANTS FROM FLUE GASES
EP0041269B1 (en) Process for the production of possibly pulverous clinker materials that contain calcium silicate and/or calcium aluminate
EP0158587B1 (en) Process for lowering the emission of pollutants in combustion units
DE19503142C2 (en) Binder and and its use
DE3804834A1 (en) METHOD FOR PRODUCING OR BURNING A FUEL AND HYDROCARBON FUEL THEREFOR
EP0238048B1 (en) Process for the production of granular mineral material from coal-burning residues
DE3232079C2 (en) Use of residual plaster and dry residue from a wet or dry working flue gas desulphurisation system
DE19523722A1 (en) Controlling free-lime content of ash from coal-fired power stations
DE3139553A1 (en) PROCEDURE FOR SO (ARROW DOWN) 2 (ARROW DOWN) DEPOSITION FROM EXHAUST GAS
DE2501503C3 (en) Process for reducing the sulfur content in exhaust gases from fluidized bed furnaces
DE3930693C1 (en)
DE2821021A1 (en) Porous solid fuel prodn. from coal-oil mixts. - giving controlled combustion and using low-cost materials
DE3211423C2 (en)
DE4140267C2 (en)
DE3347234A1 (en) Filling material for brown coal open cast mining pits
CH602166A5 (en) Removing sulphur and its cpds. from waste combustion gas
DE19504190A1 (en) Additive for promoting combustion of solid fuel
DE1745911C3 (en) Corrosion inhibitor concentrate
AT376998B (en) METHOD AND DEVICE FOR PRODUCING FUEL BRIQUETTES WITH A POLLUTANT-SETTING ADDITIVE
DD231063A1 (en) SEKUNDAERROHSTOFF FOR CEMENT
DE3740228A1 (en) Process for producing shaped pieces of concrete aggregate

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR IT SE

17P Request for examination filed

Effective date: 19850907

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR IT SE

17Q First examination report despatched

Effective date: 19861015

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT SE

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3560587

Country of ref document: DE

Date of ref document: 19871015

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: SIEMENS AKTIENGESELLSCHAFT, BERLIN UND MUENCHEN

Effective date: 19880609

Opponent name: SNAMPROGETTI S.P.A.

Effective date: 19880608

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19890213

EUG Se: european patent has lapsed

Ref document number: 85730045.3