DE3502732A1 - Process for producing a desired redox potential for flue gas scrubbing by utilising a liquid metal granule-fluidised bed reactor technique - Google Patents

Process for producing a desired redox potential for flue gas scrubbing by utilising a liquid metal granule-fluidised bed reactor technique

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Publication number
DE3502732A1
DE3502732A1 DE19853502732 DE3502732A DE3502732A1 DE 3502732 A1 DE3502732 A1 DE 3502732A1 DE 19853502732 DE19853502732 DE 19853502732 DE 3502732 A DE3502732 A DE 3502732A DE 3502732 A1 DE3502732 A1 DE 3502732A1
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DE
Germany
Prior art keywords
redox potential
liquid
bed reactor
flue gas
fluidised
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
DE19853502732
Other languages
German (de)
Other versions
DE3502732C2 (en
Inventor
Heribert Dipl.-Ing. 4390 Gladbeck Dewert
Heinrich Ing.(grad.) 4600 Dortmund Gresch
Heinz Dipl.-Ing. Hölter
Heinrich Dipl.-Ing. 4390 Gladbeck Igelbüscher
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Individual
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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
Application filed by Individual filed Critical Individual
Priority to DE19853502732 priority Critical patent/DE3502732A1/en
Priority to PCT/EP1986/000027 priority patent/WO1986004260A1/en
Priority to EP86901055A priority patent/EP0210238A1/en
Publication of DE3502732A1 publication Critical patent/DE3502732A1/en
Application granted granted Critical
Publication of DE3502732C2 publication Critical patent/DE3502732C2/de
Granted legal-status Critical Current

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Classifications

    • 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
    • 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

Abstract

It is known that for the simultaneous separating out of SO2 and NOx from flue gases, the redox potential must be moved in a controlled manner in the negative range. Additives, such as sodium dithionite, are employed for adjusting the liquid. It is further known to control the redox potential electrolytically and/or by means of an iron reactor. In order to ensure a high availability of flue gas desulphurisation plants, according to the invention it is proposed that metal granule spheres are added to the scrubbing liquid in the direct scrubber sump or in a by-pass and the scrubbing liquid is passed through a fluidised-bed reactor technique in which the iron granules take on the task of controlling the redox potential. The housing of the fluidised-bed reactor can be composed of an insulated vessel, so that the mixture of liquid and metal granules can be electrolytically controlled as a fluidised bed.

Description

Beschreibung und Erläuterung zur PatentanmeldungDescription and explanation of the patent application

'Verfahren zur Herstellung eines gewünschten Redoxpotentials für die #auchgaswaschung durch Nutzung einer flüssigen Metallgranulat-Wirbelbettreaktortechnik, Es ist bekannt, daß zur simultanen Abscheidung von SO, und NOx das Redoxpotential gesteuert im Minusbereich gefahren werden muß, Für das Einstellen der Flüssigkeit werden.Zuschlagstoffe, wie Natriumdithionit, Ethyldiamin, Tetra-Essigsäure und ähnliche Stoffe, angewandt.'Process for producing a desired redox potential for the # gas scrubbing through the use of a liquid metal granulate fluidized bed reactor technology, It is known that for the simultaneous separation of SO and NOx the redox potential must be driven controlled in the minus range, for setting the fluid Additives such as sodium dithionite, ethyl diamine, tetra-acetic acid and the like Substances, applied.

Es ist weiterhin bekannt, elektrolytisch und/oder mittels eines Eisenreaktors das Redoxpotential W zu steuern Das Abtragen von feststehenden Eisenreaktoren sowie der daraus resultierende Ein- und Ausbau dieser Reaktorteile, die zum Teil aus Profilstahl bzw.It is also known, electrolytically and / or by means of an iron reactor the redox potential W to control the removal of fixed iron reactors as well the resulting installation and removal of these reactor parts, some of which are made of sectional steel respectively.

Blechen, Rohren usw. bestehen, ist sehr zeitaufwendig.Sheets, pipes, etc. are very time-consuming.

Die Verfügbarkeit von Rauchgasentschwefelungsanlagen muß teilweise über zwei Jahre störungsfrei garantiert werden.The availability of flue gas desulphurization systems must be partially are guaranteed to be trouble-free for two years.

Aus diesem Grunde wird erfindungsgemäß vorgeschlagen, die Waschflüssigkeit im direkten Wäschersumpf oder in einem Bypass mit metallischen Granulatkugeln zu versehen, vorzugsweise mit Eisengranulat bzw. Gußgranulat, das sehr preiswert auf dem Markt zu erhalten ist und der Waschflüssigkeit beigesetzt wird; und mittels Drehkolbengebläse, das rohgasseitig angeschlossen ist bzw. dem Gas mit geringstem Sauerstoffwert und/oder ein Gas-Wasser-Gemisch zugegeben wird, ein Wasserwirbelbett erzeugt, in dem das Eisengranulat die Aufgabe der Steuerung des Redoxpotentials übernimmt.For this reason, the invention proposes the washing liquid in the direct scrubber sump or in a bypass with metallic granulate balls provided, preferably with iron granules or cast granules, which are very inexpensive is available on the market and is added to the washing liquid; and by means of Rotary piston blower that is connected to the raw gas side or the gas with the lowest Oxygen value and / or a gas-water mixture is added, a water fluidized bed produced in which the iron granules have the task of controlling the redox potential takes over.

Weiterhin wird erfindungsgemäß vorgeschlagen, den Behälter der Eisengranulat-Wirbelbettechnologie zu isolieren, d.h. z.B. aus Kunststoff herzustellen oder so zu gummieren, so daß eine elektrolytische Wirkung im Eisengranulatbett erzeugt werden kann.Furthermore, it is proposed according to the invention, the container of the iron granulate fluidized bed technology to insulate, i.e. to manufacture e.g. from plastic or to be rubberized in such a way that an electrolytic effect can be generated in the iron granulate bed.

In einfachster Art und Weise kann das rückständige Eisen bei der Gipsausschleusung durch Zentrifugen oder Vakuumfilter bzw. Filterpressen aus dem Gips ausgewaschen werden, so daß der Gips keinen Qualitätsnachteil erhält, und bedarfsgerecht können Granulatkugeln nachgefüllt werden, ohne Montageunterbrechung.The remainder of the iron can be removed in the simplest way when the plaster of paris is discharged washed out of the plaster by centrifuges or vacuum filters or filter presses so that the plaster of paris does not suffer any quality disadvantage, and can be used as required Granulate balls can be refilled without interrupting assembly.

In der beiliegenden Zeichnung ist das Verfahren dargestellt : mit 1) ein Rohgaswaschturm, in dem die Rohgasmengen, z.B. aus einem Kraftwerk mit SO, und NOx beladen, zur Gasreinigung dem Wäscher zugeführt werden; mit 2) eine Pumpe, die das Waschwasser im Kreislauf führt und eine weitere Fiüssigkeitsmenge dann durch das Wirbelbett nach oben durchdrückt; mit 3) ein Gebläse, das rohgasseitig angeschlossen ist bzw. Gas mit geringstem Sauerstoffwert und/oder ein Gas-Wasser-Gemisch dem Wirbelbettreaktor 4) zugegeben wird, um die Wirbelbetturbulenz im Metallgranulat zu erzeugen und über die Entlüftungsleitung 11) das entweichende Gas dem Wäscher zuzuführen; mit 5) eine Pumpe, die die Flüssigkeit mit dem entsprechenden Redoxpotential über die Leitungen 6) und 7) und evtl. weiteren Leitungen den entsprechend gewünschten Düsenebenen zur Verfügung bringt.The procedure is shown in the accompanying drawing: with 1) a raw gas scrubbing tower in which the raw gas quantities, e.g. from a power plant with SO, and NOx loaded are fed to the scrubber for gas cleaning; with 2) a pump, which circulates the washing water and then another amount of liquid pushes the fluidized bed upwards; with 3) a fan connected to the raw gas side is or gas with the lowest oxygen value and / or a gas-water mixture to the fluidized bed reactor 4) is added to create the fluidized bed turbulence in the metal granulate and over the vent line 11) to supply the escaping gas to the scrubber; with 5) one Pump, which the liquid with the corresponding redox potential over the lines 6) and 7) and possibly other lines to the required nozzle levels available.

Das Redoxpotential im Wirbelbettreaktor 4) kann erfindungsgemäß elektrolytisch wunschgerecht geschaltet werden, indem der Reaktor 4) als Gehäuse aus Kunststoff und/oder isoliertem Stahlgehäuse besteht, vorzugsweise z.B. einerGummi-Isolierung.According to the invention, the redox potential in the fluidized bed reactor 4) can be electrolytic can be switched as required by the reactor 4) as a housing made of plastic and / or insulated steel housing, preferably for example rubber insulation.

mit 8) ist eine Gipsaustragsanlage dargestellt, die gleichzeitig zur Entwässerung dient und die mit Zentrifugen oder dergleichen versehen ist; mit 9) ist die Nachfüllvorrichtung für z.B. Eisengranulat dargestellt; mit 10) ist die Vorrichtung zum Nachfüllen von z.B.with 8) a gypsum discharge system is shown, which is used at the same time Drainage is used and which is provided with centrifuges or the like; with 9) the refilling device for e.g. iron granulate is shown; with 10) is the Device for refilling e.g.

angelöstem Kalkhydrat, Kalkstein oder dergleichen dargestellt. loosened hydrated lime, limestone or the like shown.

Über 9) und 10) können NTA bzw. EDTA, Ameisensäure und weitere bekannte Additive zugeführt werden.NTA or EDTA, formic acid and other known ones can be found via 9) and 10) Additives are supplied.

Patentansprüche - Leerseite -Claims - blank page -

Claims (1)

Patentansprüche Anspruch 1 Verfahren zum Herstellen einer Flüssigkeit mit gewünschtem Redoxpotential zur Rauchgasreinigung, vorzugsweise für die Abscheidung von SO2 und NOx, dadurch gekennzeichnet, daß die Waschflüssigkeit durch eine flüssige Me#allgranulat-Wirbelbettreaktortechnik 4) geleitet wird.Claims Claim 1 method for producing a liquid with the desired redox potential for flue gas cleaning, preferably for separation of SO2 and NOx, characterized in that the scrubbing liquid is replaced by a liquid Me # allgranulat fluidized bed reactor technology 4) is passed. Anspruch 2 Verfahren nach Anspruch 1, dadurch daß die Vorrichtung zur Durchführung des Verfahrens aus einem isolierten Behälter besteht, vorzugsweise in gummierter und/oder totaler Kunststoffausführung, und das Gemenge aus Flüssigkeit und Metallgranulaten als Wirbelbett elektrolytisch gesteuert wird.Claim 2 method according to claim 1, characterized in that the device to carry out the method consists of an insulated container, preferably in rubberized and / or completely plastic version, and the mixture of liquid and metal granules is electrolytically controlled as a fluidized bed.
DE19853502732 1985-01-24 1985-01-28 Process for producing a desired redox potential for flue gas scrubbing by utilising a liquid metal granule-fluidised bed reactor technique Granted DE3502732A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19853502732 DE3502732A1 (en) 1985-01-28 1985-01-28 Process for producing a desired redox potential for flue gas scrubbing by utilising a liquid metal granule-fluidised bed reactor technique
PCT/EP1986/000027 WO1986004260A1 (en) 1985-01-24 1986-01-24 Process for scrubbing raw gases laden with sulphur oxides and nitrogen oxides
EP86901055A EP0210238A1 (en) 1985-01-24 1986-01-24 Process for scrubbing raw gases laden with sulphur oxides and nitrogen oxides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853502732 DE3502732A1 (en) 1985-01-28 1985-01-28 Process for producing a desired redox potential for flue gas scrubbing by utilising a liquid metal granule-fluidised bed reactor technique

Publications (2)

Publication Number Publication Date
DE3502732A1 true DE3502732A1 (en) 1986-07-31
DE3502732C2 DE3502732C2 (en) 1987-03-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6612249B2 (en) 2000-03-24 2003-09-02 Unique Patents.Com, Llc Zero NOx gaseous passivation process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1956197A1 (en) * 1969-11-07 1971-06-09 Chemengineering Company Ltd Desulphurisation of spent air, combustion and - production gases
DE2416660A1 (en) * 1973-04-09 1974-10-24 Mitsui Petrochemical Ind PROCEDURE FOR THE REMOVAL OF NITROGEN OXYDE FROM A GAS
US4078041A (en) * 1976-03-01 1978-03-07 Rexnord Inc. Electrofluidized bed gas purification arrangement and method
EP0107213A1 (en) * 1982-09-30 1984-05-02 Shell Internationale Researchmaatschappij B.V. H2S removal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1956197A1 (en) * 1969-11-07 1971-06-09 Chemengineering Company Ltd Desulphurisation of spent air, combustion and - production gases
DE2416660A1 (en) * 1973-04-09 1974-10-24 Mitsui Petrochemical Ind PROCEDURE FOR THE REMOVAL OF NITROGEN OXYDE FROM A GAS
US4078041A (en) * 1976-03-01 1978-03-07 Rexnord Inc. Electrofluidized bed gas purification arrangement and method
EP0107213A1 (en) * 1982-09-30 1984-05-02 Shell Internationale Researchmaatschappij B.V. H2S removal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z: Chemische Industrie, 36, 1984, S. 45-47 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6612249B2 (en) 2000-03-24 2003-09-02 Unique Patents.Com, Llc Zero NOx gaseous passivation process

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Publication number Publication date
DE3502732C2 (en) 1987-03-05

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