DE2509788A1 - Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate - Google Patents

Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate

Info

Publication number
DE2509788A1
DE2509788A1 DE19752509788 DE2509788A DE2509788A1 DE 2509788 A1 DE2509788 A1 DE 2509788A1 DE 19752509788 DE19752509788 DE 19752509788 DE 2509788 A DE2509788 A DE 2509788A DE 2509788 A1 DE2509788 A1 DE 2509788A1
Authority
DE
Germany
Prior art keywords
washing
pump
calcium
formic acid
pumped
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
DE19752509788
Other languages
German (de)
Inventor
Heinz Gresch
Heinz Hoelter
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19742415693 external-priority patent/DE2415693B2/en
Priority claimed from DE19742444781 external-priority patent/DE2444781A1/en
Priority to DE19752509788 priority Critical patent/DE2509788A1/en
Application filed by Individual filed Critical Individual
Priority to AT639475A priority patent/AT356635B/en
Priority to GB34212/75A priority patent/GB1505281A/en
Priority to FR7526094A priority patent/FR2285170A1/en
Priority to US05/606,785 priority patent/US4080428A/en
Priority to BR7505565*A priority patent/BR7505565A/en
Priority to NL7510250A priority patent/NL7510250A/en
Priority to AU84432/75A priority patent/AU493917B2/en
Priority to BE2054540A priority patent/BE832940A/en
Priority to SE7509770A priority patent/SE423866B/en
Priority to CH1203075A priority patent/CH617867A5/de
Priority to DK419475A priority patent/DK419475A/en
Priority to JP50113519A priority patent/JPS5155778A/en
Publication of DE2509788A1 publication Critical patent/DE2509788A1/en
Priority to GB4849677A priority patent/GB1545175A/en
Priority to US05/855,268 priority patent/US4222993A/en
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/464—Sulfates of Ca from gases containing sulfur oxides

Abstract

Method of purifying effluent gas e.g. smoke and other residual gases contg. SO2 where the gas is contacted with a washing liq. working in a closed cycle to which CaCO3, CaO, or Ca(OH)2 is added, to fix the SO2 and where the Ca cpd. formed is oxidised with atmospheric air to CaSO4 and sepd. from the closed cycle with the aid additives e.g. salts and/or acids which increase the removal of the Ca, is claimed in which the washing liq. is cleaned of solid particles prior to contact with teh gas. Incrustation of the washing plant with calcium carbonate is avoided while the atm. of SO2 absorbed is increased.

Description

Beschreibung und Erläuterung zur Zusatzpatentanmeldung "Verfahren und Vorrichtung zur Waschung von Gasen, die mit SO2 Fluor, NOx, N, CO2 und 02 angereichert sind" Zusatzpatentanmeldung zur Patentanmeldung P 24 44 781.2 In der Hauptanmeldung wird ein Verfahren zur Reinigung von Rauchgas und anderen Gasen, die mit Schwefeloxid angereichert sind, beschrieben, wobei der Waschflüssigkeit Ionen der Halogengruppe, Ionen der Karbonsäure, Ionen der Salze und Säuren des Stickstoff und Phosphor oder dergl.Description and explanation of the additional patent application "Procedure and device for scrubbing gases enriched with SO2 fluorine, NOx, N, CO2 and 02 are "additional patent application to patent application P 24 44 781.2 in the main application is a process for cleaning flue gas and other gases containing sulfur oxide are enriched, described, wherein the washing liquid ions of the halogen group, Ions of carboxylic acid, ions of salts and acids of nitrogen and phosphorus or the like

zugesetzt werden, um Inkrustierungen zu verhindern.added to prevent incrustations.

Nachstehend wird zur Verbesserung des Verfahrens ausgeführt, daß bei der Waschung von Gasen, die außer mit SO2 auch noch mit NOx, N, C02, 02 und Staub angereichert sind, erfindungsgemäß der klaren c alcium-Hydroxid-Waschflüssigkeit zur Vermeidung von Inkrustierungen und zur Aufarbeitung in ein chlorfreies Endprodukt Ameisensäure (HCOOH) zugeimpft wird.In order to improve the method, it is stated below that at the scrubbing of gases which, in addition to SO2, also contain NOx, N, C02, 02 and dust are enriched, according to the invention of the clear calcium hydroxide washing liquid to avoid incrustations and for processing into a chlorine-free end product Formic acid (HCOOH) is inoculated.

Bei der Reinigung von Abgasen, vorzugsweise Rauchgasen, z.B. hinter Sinterstraßen und Kraftwerken, benutzt man in neuerer Zeit vielfach Naßwäschen.When cleaning exhaust gases, preferably flue gases, e.g. behind Sinter roads and power plants, wet washing has been used a lot in recent times.

Das Waschwasser wird dabei zur Aufnahme der genannten Schadstoffe, vorzugsweise SO2, NOx und Fluor, mit einer Kalksuspensionslösung gewaschen.The washing water is used to absorb the pollutants mentioned, preferably SO2, NOx and fluorine, washed with a lime suspension solution.

Zur Vermeidung von Inkrustationen, d.h. Carbonatbildungen innerhalb der Waschereinrichtungen impft man in neuerer Zeit dem Waschwasser Chlorionen in Form von Salzsäure zu.To avoid incrustations, i.e. carbonate formation within of the washing facilities one in more recent times inoculated chlorine ions into the washing water Form of hydrochloric acid too.

Das anfallende Abfallprodukt der Anlagentechnik kann entweder zu Gips weiterverarbeitet oder aber als Zuschlagstoff bei der Zementherstellung Verwendung finden.The resulting waste product of the plant engineering can either become gypsum processed or used as an additive in cement production Find.

Aus diesem Grunde ist es erforderlich, daß das Abfallprodukt wenig Verunreinigungen enthält (z.B. Chloride).For this reason it is necessary that the waste product is little Contains impurities (e.g. chlorides).

Um diese Nachteile zu vermeiden, wird erfindungsgemäß vorgeschlagen, einer klaren C alcium-Hydroxid-Was chiösung anstelle von Salzsäure Ameisensäure (HCOOH) zuzuführen.In order to avoid these disadvantages, it is proposed according to the invention that a clear C alcium-Hydroxid-Was chiösung instead of hydrochloric acid formic acid (HCOOH) to be added.

Es wird weiterhin erfindungsgemäß vorgeschlagen, die Durchführung des Verfahrens entsprechend der beiliegenden Anlagentechnik durchzuführen, um eine ordnungsgemäße und schnelle Aufoxidation von CaSO3 zu CaS04 zu erzielen und die Herabsetzung des Calcium-Carbonats-Anteils zu garantieren.It is also proposed according to the invention to carry out of the procedure according to the enclosed system technology to carry out a to achieve proper and rapid oxidation of CaSO3 to CaS04 and the To guarantee a reduction in the calcium carbonate content.

In der beiliegenden Zeichnung ist die Vorrichtung zur Durchführung des Verfahrens dargestellt: Mit (1): Eintritt Rohgas, das mit SO2, Fluor, NOx, N, CO2, 02 Und staubförmigen Bestandteilen angereichert ist.In the accompanying drawing is the device for implementation of the process: With (1): Ingress of raw gas which is mixed with SO2, fluorine, NOx, N, CO2, 02 and dusty constituents is enriched.

Mit (2): Die Frischwasserzugabe, die gleichzeitig zur Rauchgasabkühlung dient.With (2): The addition of fresh water, which simultaneously cools the flue gas serves.

Mit (3): Eine Wascherstufe Mit (4): Vorzugsweise eine zweite Wascherstufe Mit (5): Ein Ventilator Mit (6): Ein Abtauchbehälter, in dem die gesamten Flüssigkeiten, die den Waschprozeß durchlaufen haben, aus der Waschapparatur zusammengeführt werden.With (3): One washing stage With (4): Preferably a second washing stage With (5): A fan With (6): A submersible container in which all the liquids, which have gone through the washing process are brought together from the washing apparatus.

Mit (7): Die Zugabe von vorzugsweise Ameisensäure (HCOOH).With (7): The addition of preferably formic acid (HCOOH).

Diese erfindungsgemäße Zugabe von Ameisensäure an dieser Stelle kann innerhalb des Systems natürlich auch an anderer Stelle zugeführt werden. This inventive addition of formic acid at this point can can of course also be supplied elsewhere within the system.

Mit (8): Luftanschluß Mit (9): Oxidationsvorrichtung Mit (10): Pumpe zum Transport des mit Schadstoffen aus dem Abgas angereicherten Waschmediums aus dem Abgasbehälter (6) in die Oxidationsvorrichtung (9) unter Zuführung von Luft (8).With (8): air connection With (9): oxidation device With (10): pump to transport the scrubbing medium enriched with pollutants from the exhaust gas the exhaust gas container (6) into the oxidation device (9) with the supply of air (8th).

Mit (11): Kalk- oder Kalkmilchzugabe Mit (12): Pumpe zur Förderung der Flüssigkeit aus dem Oxidationsbehälter in den Sinkabscheider.With (11): addition of lime or milk of lime With (12): pump for pumping the liquid from the oxidation tank into the sink separator.

Mit (13): Pumpe, die eine kleine Menge Waschwasser aus dem Schwerkraftabscheider (pH kleiner 12) zur pH-Wertregelung der Flüssigkeitsmengen im Oxideur (9) auf einen pH-Wert kleiner 8 pumpt, um eine gute Aufoxidation von CaS03 in CaSO4 in einer sehr geringen Zeit zu ermöglichen.With (13): Pump that draws a small amount of washing water from the gravity separator (pH less than 12) to regulate the pH value of the amount of liquid in the Oxideur (9) on one PH value less than 8 pumps to ensure good oxidation of CaS03 in To enable CaSO4 in a very short time.

Mit (14): Schwerkraftsinkabscheider zur Trennung der aufoxidierten Feststoffe aus dem Waschflüs 5 ig keitskreis lauf Mit (15): Pumpe zur Förderung der gereinigten Waschflüssigkeit in die Waschstufen (3) und/oder (4) Mit (16): Pumpe zur Förderung der voreingedickten schlammartigen Massen zur Zentrifuge (17) Mit (17): Zentrifuge Mit (18): Pumpe zur Rückführung des Filtrats aus der Zentrifuge zum Sinkabscheider (14) Mit (19): Feststoff, bestehend aus Calciumsulfat (CaSO4 . 2H20), das als deponiefähiges Gut deponiert oder zu Gips aufgearbeitet werden kann. Wobei dann diese Massen selbstverständlich auch zur Herstellung von Straßenunterbau- oder Baumaterialien Anwendung finden können, da sie keine Chlorverbindungen enthalten. With (14): gravity sink separator for separating the oxidized Solids from the washing liquid cycle With (15): Pump for conveying the cleaned washing liquid in the washing stages (3) and / or (4) With (16): Pump to promote the pre-thickened sludge-like masses to the centrifuge (17) with (17): Centrifuge With (18): Pump for returning the filtrate from the centrifuge to the sink separator (14) With (19): Solid, consisting of calcium sulfate (CaSO4 . 2H20) that are deposited as landfill goods or processed into plaster of paris can. Whereby these masses are of course also used for the production of road substructures or building materials can be used because they do not contain any chlorine compounds.

Selbstverständlich ist die Erfindung nicht auf die vorstehend im einzelnen dargestellten und beschriebenen Ausbildungsformen beschränkt, sondern es sind zahlreiche Abänderungen möglich, ohne jedoch von dem Grundgedanken abzuweichen, ein Verfahren und eine Vorrichtung zur Waschung von Gasen zu benutzen, die mit SO2 Fluor, NOx, N, CO2, 82 und staubförmigen Bestandteilen angereichert sind, wobei der klaren Calcium-Hydroxid-Waschflüssigkeit HCOOH (Ameisensäure) zugeführt wird, um Inkrustierungen innerhalb der Waschereinrichtungen zu vermeiden und um ein chlorfreies Endprodukt (CaS04 . 2H20) zu erzielen. Gleichzeitig sollen während der Oxidation bei einem pH-Wert kleiner 8 die Calciumcarbonate zerstört werden, um ein reines Calciumsulfat zu erhalten. Of course, the invention is not limited to the above in individual forms of training shown and described are limited, but rather numerous changes are possible without, however, deviating from the basic idea, to use a method and a device for scrubbing gases containing SO2 Fluorine, NOx, N, CO2, 82 and dusty Ingredients enriched are, HCOOH (formic acid) being added to the clear calcium hydroxide washing liquid in order to avoid incrustations within the washing facilities and around to achieve a chlorine-free end product (CaS04.2H20). At the same time should during the calcium carbonates are destroyed by oxidation at a pH value of less than 8, to obtain a pure calcium sulfate.

Patentansprüche:Patent claims:

Claims (1)

Patentansprüche: Anspruch 1: Verfahren zur Waschung von Gasen, die mit S02, Fluor, NOx, N,C02, 02 und staubförmigen Bestandteilen belastet sind, dadurch gekennzeichnet, daß zur Vermeidung von Inkrustationen einer klaren Calcium-Hydroxidlösung Ameisensäure (HCOOH) zugeführt wird.Claims: Claim 1: Method for scrubbing gases that are contaminated with S02, fluorine, NOx, N, C02, 02 and dusty components, thereby characterized in that a clear calcium hydroxide solution to avoid incrustations Formic acid (HCOOH) is fed. Anspruch 2: Vorrichtung zur Durchführung des Verfahrens zur Waschung von Gasen, die mit S02 Fluor, NOxs N, COL, 02, staubförmigen Bestandteilen und evtl. anderen Ballaststoffen belastet sind, dadurch gekennzeichnet, daß die Vorrichtung aus einem Frischwasseranschluß (2) besteht, einem Wascher (3) und vorzugsweise einem weiteren nachgeschalteten Wascher (4) sowie einem Ventilatorantrieb (5), einem Abtauchbehälter (6), in dem der Waschlösung vorzugsweise die Ameisensäure (HCOOH) zugeimpft wird sowie einem Oxidationsbehälter (9), dem Luft (8) und die Waschflüssigkeit aus dem Abtauchbehälter (6), die mit Sulfit angereichert ist, zugeführt wird. Hier erfolgt bei einem pH-Wert, vorzugsweise kleiner 8, die Aufoxidation zu Calcium-Sulfat.Claim 2: Device for carrying out the washing method of gases containing S02 fluorine, NOxs N, COL, 02, dusty components and possibly other dietary fibers are loaded, characterized in that the device consists of a fresh water connection (2), a washer (3) and preferably one further downstream washer (4) and a fan drive (5), an immersion tank (6), in which formic acid (HCOOH) is preferably inoculated into the washing solution and an oxidation tank (9), the air (8) and the washing liquid from the Immersion tank (6), which is enriched with sulfite, is fed. Here takes place at a pH value, preferably less than 8, oxidation to calcium sulfate. Zur Einstellung des pH-Wertes der Waschflüssigkeit im Oxidationsbehälter, pH kleiner 8, wird mittels einer Pumpe (13) aus dem Schwerkrafts inkabs cheider ( 14) eine entsprechende C alcium-Hydroxid-Meng e gepumpt.To adjust the pH value of the washing liquid in the oxidation tank, pH less than 8, is separated by means of a pump (13) from the gravity inkabs (14) a corresponding amount of calcium hydroxide was pumped. Die Vorrichtung ist so ausgelildet, daß sie vorzugsweise bei (11) mit einer Kalkzugabe versehen ist. The device is designed so that it is preferably at (11) is provided with an addition of lime. Die vorgedickte Calcium-Sulfatmasse wird mittels der Pumpe (16) einer Trennvorrichtung, vorzugsweise Zentrifuge (17), zugepumpt und das Filtrat über die Pumpe (18) in den Schwerkraftabscheider (14) zurückgeführt. The pre-thickened calcium sulfate mass is by means of the pump (16) a Separation device, preferably centrifuge (17), pumped in and the filtrate over the Pump (18) returned to the gravity separator (14). Mittels der Pumpe (15) wird die klare Calcium-Hydroxid-Lösung aus dem Schwerkraftabscheider, vorzugsweise mit einem ohen pH-Wert, angereichert mit Ameisensäure, dem Waschprozeß zugepumpt. Leerseite The clear calcium hydroxide solution is extracted by means of the pump (15) the gravity separator, preferably with a low pH, enriched with Formic acid, pumped into the washing process. Blank page
DE19752509788 1974-04-01 1975-03-06 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate Ceased DE2509788A1 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
DE19752509788 DE2509788A1 (en) 1974-04-01 1975-03-06 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate
AT639475A AT356635B (en) 1974-09-19 1975-08-18 METHOD AND DEVICE FOR PURIFYING SMOKE GASES AND OTHER EXHAUST GASES CONTAINING SULFUR DIOXIDE
GB34212/75A GB1505281A (en) 1974-09-19 1975-08-18 Process and apparatus for the purification of flue and other waste gas
FR7526094A FR2285170A1 (en) 1974-09-19 1975-08-22 PROCESS AND DEVICE FOR PURIFYING FUME GASES AND OTHER WASTE GASES CONTAINING SULPHUROUS ANHYDRIDE
US05/606,785 US4080428A (en) 1974-09-19 1975-08-22 Process for the purification of flue and other waste gas
BR7505565*A BR7505565A (en) 1974-09-19 1975-08-29 PROCESS AND APPARATUS FOR PURIFYING SMOKE GASES AND OTHER EXHAUST GASES CONTAINING SULPHURUS ANHYDRATE
NL7510250A NL7510250A (en) 1974-09-19 1975-08-29 METHOD AND EQUIPMENT FOR THE PURIFICATION OF SMOKE GASES AND OTHER EXHAUST GASES CONTAINING SULFUR DIOXIDE.
AU84432/75A AU493917B2 (en) 1975-09-01 Improvements in or relating to process and apparatus forthe purification of flue andother waste gas
BE2054540A BE832940A (en) 1974-09-19 1975-09-01 PROCESS AND DEVICE FOR PURIFYING FUME GASES AND OTHER WASTE GASES CONTAINING SULPHUROUS ANHYDRIDE
SE7509770A SE423866B (en) 1974-09-19 1975-09-03 VIEW TO CLEAN Sulfur Dioxide-containing Smoke and Other Exhausts WHEN THE GAS IS CONTACTED WITH LAUNDRY FLUID AND DEVICE FOR IMPLEMENTATION OF THE PROCEDURE
CH1203075A CH617867A5 (en) 1974-09-19 1975-09-17
DK419475A DK419475A (en) 1974-09-19 1975-09-18 PROCEDURE AND APPARATUS FOR CLEANING GAS GAS AND OTHER EXHAUST GASES CONTAINING SULFUR DIOXIDE
JP50113519A JPS5155778A (en) 1974-09-19 1975-09-19 Haigasuoyobi nisankaioo fukumu sonotano gasuojokasuruhohooyobi sochi
GB4849677A GB1545175A (en) 1974-09-19 1977-11-22 Removal of noxious contaminants from gas
US05/855,268 US4222993A (en) 1974-09-19 1977-11-28 Removal of noxious contaminants from gas

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19742415693 DE2415693B2 (en) 1974-04-01 1974-04-01 Process for cleaning flue gases or other gases
DE19742444781 DE2444781A1 (en) 1974-04-01 1974-09-19 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate
DE19752509788 DE2509788A1 (en) 1974-04-01 1975-03-06 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate

Publications (1)

Publication Number Publication Date
DE2509788A1 true DE2509788A1 (en) 1976-09-16

Family

ID=27185867

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752509788 Ceased DE2509788A1 (en) 1974-04-01 1975-03-06 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate

Country Status (1)

Country Link
DE (1) DE2509788A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2530538A1 (en) * 1975-07-09 1977-01-27 Hoelter Heinz Gas scrubbing incorporating gypsum or ammonium sulphate prodn. - from lime and acids or salts forming water soluble calcium salts in liquor
DE3230352A1 (en) * 1982-08-14 1984-02-16 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Process for purification of flue gas from SO2, HCl, HF and preferably NOx downstream of coal-fired or oil-fired power stations and refuse incineration plants or other fired plants
DE3248567A1 (en) * 1982-12-30 1984-07-05 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Process for the purification of flue gases, preferably from coal power stations
DE3415541A1 (en) * 1984-04-26 1985-10-31 Deutsche Babcock Anlagen Ag, 4200 Oberhausen METHOD AND DEVICE FOR DESULFURING SMOKE GASES

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2405968A1 (en) * 1973-02-10 1974-08-22 Kureha Chemical Ind Co Ltd METHOD FOR REMOVING SULFUR DIOXIDE FROM COMBUSTION GAS

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2405968A1 (en) * 1973-02-10 1974-08-22 Kureha Chemical Ind Co Ltd METHOD FOR REMOVING SULFUR DIOXIDE FROM COMBUSTION GAS

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2530538A1 (en) * 1975-07-09 1977-01-27 Hoelter Heinz Gas scrubbing incorporating gypsum or ammonium sulphate prodn. - from lime and acids or salts forming water soluble calcium salts in liquor
DE3230352A1 (en) * 1982-08-14 1984-02-16 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Process for purification of flue gas from SO2, HCl, HF and preferably NOx downstream of coal-fired or oil-fired power stations and refuse incineration plants or other fired plants
DE3248567A1 (en) * 1982-12-30 1984-07-05 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Process for the purification of flue gases, preferably from coal power stations
DE3415541A1 (en) * 1984-04-26 1985-10-31 Deutsche Babcock Anlagen Ag, 4200 Oberhausen METHOD AND DEVICE FOR DESULFURING SMOKE GASES

Similar Documents

Publication Publication Date Title
DE2622197C2 (en) Process for cleaning flue gases and other exhaust gases containing sulfur dioxide
EP0005301B1 (en) Process for the removal of sulphur oxides from high-chloride flue gases
DE2313264B2 (en) Process for the direct production of magnesium and calcium sulphate of high purity from exhaust gases containing SO3 gas
DE2304496A1 (en) PROCEDURE FOR SO DEEP 2 REMOVAL
DE2509788A1 (en) Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate
EP0324845B1 (en) Process for desulphurating flue gases from power station boiler furnaces
DE2415693B2 (en) Process for cleaning flue gases or other gases
DE3119749C2 (en) Process for the production of calcium sulfate hemihydrate from flue gas gypsum
DE2913867A1 (en) Sulphur di:oxide removal from exhaust gas streams - having scrubbing liquor in which pH is controlled by use of mineral and organic acid(s) and to which calcium carbonate is added
DE3139991A1 (en) Limestone scrubbing for scrubbing waste gases, preferably from coal power stations
DE3507690A1 (en) Process for purifying nitrogen oxide (NO)-containing flue gases
WO1987002269A1 (en) Process for simultaneous extraction of so2 and nox contained in waste gases
DE2519489A1 (en) Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate
DD297887A7 (en) METHOD FOR CLEANING SMOKE GASES
DE19847940A1 (en) Treatment of water containing magnesium sulfate, especially from a flue gas desulfurization unit, comprises precipitating calcium sulfate with calcium chloride recycled from magnesium hydroxide precipitation
DE3124671A1 (en) Process and plant for the selective separation of chlorides and fluorides from flue gases or exhaust gases
DE3230352A1 (en) Process for purification of flue gas from SO2, HCl, HF and preferably NOx downstream of coal-fired or oil-fired power stations and refuse incineration plants or other fired plants
DE3418285A1 (en) Process for scrubbing out SO2, HCL, HF, NOx and other pollutants from the flue gas downstream of, preferably, fossil-fuel power stations
DE2530538C2 (en) Method and apparatus for purifying gases containing SO? 2?, Fluorine, NO? X?, N, CO? 2? and O? 2? are enriched
DE2519939A1 (en) Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate
DE3834679C1 (en) Process for the desulphurisation of flue gases of power station boiler furnaces
DE2730845A1 (en) Purificn. of gas contg. sulphur di:oxide by washing - using an additive contg. a poly:carboxylic acid
DE2746926A1 (en) Purificn. of gas contg. sulphur di:oxide by washing - using an additive contg. a poly:carboxylic acid
DE3117835A1 (en) Process for removing pollutants, in particular sulphur oxides from combustion exhaust gases
DE3217979A1 (en) Process for purifying fluoride-containing flue gases by wet absorption

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8126 Change of the secondary classification

Ipc: B01D 53/14

8176 Proceedings suspended because of application no:

Ref document number: 2444781

Country of ref document: DE

Format of ref document f/p: P

8178 Suspension cancelled
8131 Rejection