DE2550488A1 - Nitrogen oxide removal from waste gas - by using an oxidising wash soln. prior to alkaline wash soln. - Google Patents
Nitrogen oxide removal from waste gas - by using an oxidising wash soln. prior to alkaline wash soln.Info
- Publication number
- DE2550488A1 DE2550488A1 DE19752550488 DE2550488A DE2550488A1 DE 2550488 A1 DE2550488 A1 DE 2550488A1 DE 19752550488 DE19752550488 DE 19752550488 DE 2550488 A DE2550488 A DE 2550488A DE 2550488 A1 DE2550488 A1 DE 2550488A1
- Authority
- DE
- Germany
- Prior art keywords
- washing
- soln
- liquid
- nox
- absorbent
- 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
Links
Classifications
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- 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
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- 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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- 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
- B01D53/68—Halogens or halogen compounds
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
Beschreibung und Erläuterung zur Patentanmeldung "Verfahren ZUJIL Waschen von NOX, SO2, HC1 und ähnlichen Rauchgasbegleitern??.Description and explanation of the patent application "Procedure ZUJIL Washing of NOX, SO2, HC1 and similar flue gas companions ??.
Es ist bekannt, SO2 hinter Kraftwerken mit Waschflüssigkeiten, die Kalkmilch enthalten, auszuwaschen und das Endprodukt in Gips zu wandeln.It is known to have SO2 behind power plants with scrubbing liquids that Containing milk of lime, wash out and transform the end product into plaster of paris.
Bei Müllverbrennungsanlagen wird ebenfalls eine Waschflüssigkeit, mit Kalkmilch angereichert, vielfach #um Auswaschen der Schadstoffe von SO2, HF, HCl und weiteren Rauchgasbegleitern benutzt.In the case of waste incineration plants, a washing liquid is also used, enriched with milk of lime, often # to wash out the pollutants of SO2, HF, HCl and other flue gas companions are used.
Die Auswaschung von NOx mit Waschflüssigkeiten, die Kalkmilch oder Calciumionen enthalten, ist nicht befriedigend, weil bei der Lösung von NO, (Stickstoffdioxid in Wasser) Salpetersäure und NO frei werden.The leaching of NOx with washing liquids, the milk of lime or Containing calcium ions is unsatisfactory because in the solution of NO, (nitrogen dioxide in water) nitric acid and NO are released.
Das gleiche passiert bei der Anlösung mit Erdalkali-Hydroxiden, wie z.B. Calciumhydroxid usw.The same thing happens when dissolving with alkaline earth hydroxides, such as e.g. calcium hydroxide etc.
Um das freigewordene und noch im Gas als Rest vorhandene NO (Stickstoffmonoxid oder Stickoxid) durch Calciumhydroxid absorbierbares Stickstoffdioxid zu überführen, wird erfindungsgemäß vorgeschlagen, das gesamte Rohgas, das N°xX 502 und weitere Schadstoffbegleiter aufweist, bevor es mit der alkalischen Waschflüssigkeit in Berührung kommt, die zur Auswaschung der SO2, HC1 und HF-Mengen vorgesehen ist, mit einem Oxidationsmittel zu versehen und vor der ersten Waschstufe die mit Oxidationsmitteln versehene Waschflüssigkeit einzusprühen.The NO (nitrogen monoxide or nitrogen oxide) to convert nitrogen dioxide absorbable by calcium hydroxide, is proposed according to the invention that total raw gas, the N ° xX 502 and other pollutants before it comes with the alkaline washing liquid comes into contact, which is intended to wash out the SO2, HC1 and HF quantities, to be provided with an oxidizing agent and before the first washing stage with oxidizing agents spray provided washing liquid.
Das Oxidationsmittel dient zur Auf oxidation des Stickoxids zu Stickstoffdioxid.The oxidizing agent is used to oxidize the nitrogen oxide to nitrogen dioxide.
Erfindungsgemäß wird als Oxidationsmittel vorzugsweise Wasserstoff-Superoxid verwandt.According to the invention, the preferred oxidizing agent is hydrogen superoxide related.
Selbstverständlich kann auch ein anderes Oxidationsmittel wie Kalium-Permanganat oder dergleichen Anwendung finden.Of course, another oxidizing agent such as potassium permanganate can also be used or the like can be used.
Sollte jedoch auf ein sauberes CaSO4 - Endprodukt Wert gelegt werden, so wird erfindungsgemäß vorzugsweise Wasserstoff-Superoxid als Oxidationsmittel für die erste Waschflüssigkeitsberührung eingesetzt.However, if a clean CaSO4 end product is important, according to the invention, hydrogen superoxide is preferably used as the oxidizing agent used for the first contact with the washing liquid.
Der chemische Prozeß läuft wie folgt ab: 4 NO + 3 02 + 2 H20 = 4 HNO3.The chemical process works as follows: 4 NO + 3 02 + 2 H20 = 4 HNO3.
Die gebildete Salpetersäure wird mit der Chlorcalciumchloridlösung bzw. mit der Kalkmilch neutralisiert, ohne das Endprodukt Gips negativ zu beeinflussen. Es bildet sich das wasserlösliche Calciumnitrat; das ist dienlich für die Oxidation von Ca803 zu CaSO4.The nitric acid formed is mixed with the calcium chloride solution or neutralized with the milk of lime without negatively affecting the end product gypsum. The water-soluble calcium nitrate is formed; this is conducive to oxidation from Ca803 to CaSO4.
In der beiliegenden Zeichnung ist die Vorrichtung zur Durchführung des Verfahrens und die Verfahrenserläuterung dargestellt: mit 1: das Rohgas, das mit N°x SO, HC1, HF und weiteren Schadstoffbegleitern angereichert ist; mit 2: der Flüssigkeitsgastrenner; mit 3: der Ventilator; mit 4: die absorbierende Waschflüssigkeit für SO2, HC1, HF und weitere Schadstoffbegleiter, jedoch ohne NOX - Absorptionsmittelzugabe; mit 5: der Absorptionsmittelbehälter mit dem Absorptionsmittel, vorzugsweise Wasserstoffsuperoxid; mit 6: die Pumpe zum Einsprühen der Waschflüssigkeit für den Waschwasserkreislauf; mit 7: die Dosierpumpe zum Einsprühen der Oxidationsflüssigkeit 5 in Oxidationsflüssigskeitszerstäube oder Düsen 8, die entsprechend der NO, - Belastung mehrfach hintereinander und in erforderlich beliebiger ztreckenlänge waagerecht oder horizontal angebracht sein können.In the accompanying drawing is the device for implementation of the process and the process explanation: with 1: the raw gas that is enriched with N ° x SO, HC1, HF and other pollutants; with 2: the Liquid gas separator; with 3: the fan; with 4: the absorbent washing liquid for SO2, HC1, HF and other pollutants, but without the addition of NOX absorbent; with 5: the absorbent container with the absorbent, preferably hydrogen peroxide; with 6: the pump for spraying in the washing liquid for the washing water circuit; with 7: the metering pump for spraying the oxidizing liquid 5 into oxidizing liquid atomizers or nozzles 8, which, depending on the NO, load several times in succession and in required any length of section horizontally or horizontally can.
Selbstverständlich ist die Erfinung nicht auf die vorstehend im einzelnen dargestellten und beschriebenen Ausbildungsformen beschränkt, sondern es sind zahlreiche Abänderungen möglich, ohne jedoch von dem Grundgedanken abzuweichen, Schadgase, die mit S02, HCI, HF und NOx angereichert sind, so zu waschen, daß sie mit zwei verschiedenartigen Waschflüssigkeiten beaufschlagt werden, wobei die zuerst kontaktierende 7X7aschflüssigkeit aus der normalen absorbierenden Waschflüssigkeit, z.B.Of course, the invention is not limited to the above in detail Forms of training shown and described are limited, but there are numerous Changes possible without deviating from the basic idea of polluting gases, which are enriched with SO2, HCI, HF and NOx, so that they are washed with two different types of washing liquids are applied, the first contacting 7X7 wash liquid from the normal absorbent wash liquid, e.g.
Kalkmilch oder Calciumhydroxid , besteht, die zusätzlich mit einem Oxidationsmittel, erfindungsgemäß vorzugsweise bestehend aus Wasserstoffsuperoxid oder auch Kalium-Permanganat, versehen ist und die zweite Kontaktierungszone mit der normalen absorbierenden Waschflüssigkeit beaufschlagt wird.Milk of lime, or calcium hydroxide, is also made with a Oxidizing agent, according to the invention preferably consisting of hydrogen peroxide or potassium permanganate, and the second contacting zone with the normal absorbent washing liquid is applied.
Patentansprüche:Patent claims:
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752550488 DE2550488A1 (en) | 1975-11-11 | 1975-11-11 | Nitrogen oxide removal from waste gas - by using an oxidising wash soln. prior to alkaline wash soln. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752550488 DE2550488A1 (en) | 1975-11-11 | 1975-11-11 | Nitrogen oxide removal from waste gas - by using an oxidising wash soln. prior to alkaline wash soln. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2550488A1 true DE2550488A1 (en) | 1977-05-18 |
Family
ID=5961397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19752550488 Ceased DE2550488A1 (en) | 1975-11-11 | 1975-11-11 | Nitrogen oxide removal from waste gas - by using an oxidising wash soln. prior to alkaline wash soln. |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2550488A1 (en) |
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1975
- 1975-11-11 DE DE19752550488 patent/DE2550488A1/en not_active Ceased
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8131 | Rejection |