DE2425324A1 - Sulphur dioxide-contg gas purificn with wet electrofilter - using lime water cycle with excess chloride ions, preventing deactivation - Google Patents

Sulphur dioxide-contg gas purificn with wet electrofilter - using lime water cycle with excess chloride ions, preventing deactivation

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Publication number
DE2425324A1
DE2425324A1 DE19742425324 DE2425324A DE2425324A1 DE 2425324 A1 DE2425324 A1 DE 2425324A1 DE 19742425324 DE19742425324 DE 19742425324 DE 2425324 A DE2425324 A DE 2425324A DE 2425324 A1 DE2425324 A1 DE 2425324A1
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Germany
Prior art keywords
lime water
pref
contg
wet
electrostatic precipitator
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Granted
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DE19742425324
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German (de)
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DE2425324C2 (en
Inventor
Heinz Hoelter
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Individual
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Priority to DE19742425324 priority Critical patent/DE2425324C2/en
Publication of DE2425324A1 publication Critical patent/DE2425324A1/en
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Publication of DE2425324C2 publication Critical patent/DE2425324C2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/16—Plant or installations having external electricity supply wet type

Abstract

Waste gases laden with SO2 and similar harmful materials are purified with a wet electrofilter in which the liquor is circulated and lime water is used which is enriched with Cl ions to the level necessary foir destruction of carbonates and incrustations. The wet electrofilter pref. is preceded by a dry pre-separator (pref. an electro-filter). The excess Cl ions, pref. HCl, and lime suspension pref. are injected into the liquor cycle. Incrustations, carbonate formation and corrosion are prevented, so that the electro-filter remains active.

Description

Beschreibung und Erläuterung zur Patentanmeldung Verfahren zur Auswaschung von Rauchgasen mittels Elektrofilter, die mit S02, oder ähnlichen Schadstoffen belastet sind." Das Auswaschen von S02 z.B. hinter Kraftwerken und das Auswaschen von S02 und ähnlichen Rauchgasbegleitern hinter Müllverbrennungsanlagen wird auschließlich über Naßwaschverfahren vorzugsweise nach dem Venturisystem durchgeführt.Description and explanation of the patent application Process for washing out of flue gases by means of electrostatic precipitators that are contaminated with S02 or similar pollutants "The washing out of S02 e.g. behind power plants and the washing out of S02 and similar flue gas escorts behind waste incineration plants will be used exclusively preferably carried out according to the Venturi system via wet washing processes.

Das Reinigen von S02 belasteten Abgasen, durch Naßelektro-' filter hat sich nicht bewährt, da 1) bei reiner Wasserwaschung die Korrosion sehr stark und der Auswascheffekt nicht genügend hoch ist.The cleaning of SO2 polluted exhaust gases by wet electrostatic filters has not proven itself, since 1) with pure water washing the corrosion is very strong and the washout effect is not sufficiently high.

2) Das Auswaschen mit Kalkmilch mußte aufgegeben werden, da Inkrustierungen und Karbonatbildungen die Aktivität des Elektrofilters nach kurzer Einsatzdauer so stark beeinträchtigten, daß eine sinnvolle Reinigung nicht mehr gewährleistet war.2) Washing with milk of lime had to be given up because of incrustations and carbonate formation, the activity of the electrostatic precipitator after a short period of use so badly impaired that meaningful cleaning is no longer guaranteed was.

Um alle diese Nachteile zubeseitigen, wird erfindungsgemäß vorgeschlagen, ein Gasauswaschverafhren zu wählen, das mit einem Elektrofilter betrieben wird, vorzugsweise in zweistufiger Bauweise, wobeiin der ersten Abscheiderstufe der Staub trocken abgeschieden wird, und in der zweiten Abscheiderstufe wird das Gas durch einen Naßelektrofilter geführt, der mit Kalkwa'ser- und Chlorionenimpfung zur Waschung bespühlt und besprüht wird.In order to eliminate all these disadvantages, it is proposed according to the invention that to choose a gas scrubbing process that is operated with an electrostatic precipitator, preferably in two-stage construction, with the first separator stage the Dust is separated dry, and in the second separator stage is the gas passed through a wet electrostatic precipitator with lime water and chlorine ion inoculation is rinsed and sprayed for washing.

In der Praxix kann es er'findungsgemäß so gehandhabt werden, daß eins Kalkwasserflüssigkeit mit HCl-Ionen so weit angereichert wird, daß Sarbonatbildungen und Inkrustierungen im Elektrofilter vermieden werden und dadurch der Elektrofilter aktiv bLeibt.In practice, according to the invention, it can be handled in such a way that one Lime water is so enriched with HCl ions that sarbonate formations and incrustations in the electrostatic precipitator are avoided and thereby the electrostatic precipitator remains active.

Durch die erfindungsgemäße zweistufige Reinigung a) Trockenphase und b) Naßphase mit Kalkwasser und Chlorionenimpfung zwecks zerstörender Karbonat- und Inkrus tationsbildungen ist die Gewähr gegeben, daß die im Trockenstaub nicht immer klar zu definierenden Rückstände, die Gaswäsche nach dea erfindungsgemäßen Verfahren nicht negativ in der Flüssigkeitsphase beeinträchtigen.The two-stage cleaning according to the invention a) dry phase and b) Wet phase with lime water and chlorine ion inoculation for the purpose of destructive carbonate and Incrustation is a guarantee that the dry dust is not always clearly defined residues, the gas scrubbing according to the method according to the invention does not affect negatively in the liquid phase.

Selbtverständlich ist die Erfindung nicht auf die vorstehend im einzelnen dargestellen und beschriebenen Abbildungsformen beschränkt, sondern es sind zahlreiche Abänderungen möglich, ohne jedoch von dem Grundgedanken abzuweichen, eine Abgaswäsche so ZU betreiben, daß die erste'Phase ein Trockenabscheidersystem übernimmt, vorzugsweise Elektrofilter, und die zweite Phase durch einen Naßelektrofilter zur Reinigung angesetzt wird, wobei dieser Naßelektrofilter mit Ralkwasser- und Chlorionengeimpften Flüssigkeiten z.B. HCl-Impfung im Kreislaufverfahren wäscht, so daß Inkrustireungen, Karbonatbildungen und Korrosionen vermieden werden.Of course, the invention is not limited to the above in detail Represented and described forms of illustration are limited, but there are numerous Changes possible without deviating from the basic idea, an exhaust gas scrubbing To operate so that the first phase takes over a dry separator system, preferably Electrostatic precipitator, and the second phase through a wet electrostatic precipitator is set for cleaning, this wet electrostatic precipitator with Ralkwasser and Washes fluids inoculated with chlorine ions, e.g. HCl vaccination in a circulatory process, so that incrustations, carbonate formation and corrosion are avoided.

Patentansprüche:Patent claims:

Claims (1)

Patentansprüche: Anspruch 1: Verfahren zur Reinigung von Abgasen, die auf s02 und ähnlichen Schadstoffen belastet sind, dadurch gekennzeichnet, daß die Reinigung der Abgase durch einen Naßelektrofilter vorgenommen wird, wobei die Flüssigkeit des Naßelektrofilters im Kreislauf gefahren wird und Kalkwasser mit Chlorionenanreicherungen in der Höhe der erforderlichen Zerstörung von Karbonaten und Inkrustierungen benutzt wird.Claims: Claim 1: Process for cleaning exhaust gases, which are contaminated with s02 and similar pollutants, characterized in that the cleaning of the exhaust gases is carried out by a wet electrostatic precipitator, the Liquid of the wet electrostatic precipitator is circulated and lime water with Chlorine ion accumulations in the amount of the required destruction of carbonates and incrustations is used. Anspruch 2: Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß vorzugsweise das Reinigungsverfahren a) durch einen Trockenvorabscheider und b) durch einen Naßelektrofilter, der mit Kalkwasser- und Chlorionenüberschuß, vorzugsweise HCl-Impfung, arbeitet, betrieben wird.Claim 2: The method according to claim 1, characterized in that preferably the cleaning process a) by means of a dry pre-separator and b) by a wet electrostatic precipitator with excess lime water and chlorine ions, preferably HCl vaccination, works, is operated. Anspruch 3: Verfahren nach Anspruch 1 bis 3 dadurch gekennzeichnet, daß der Waschflüssigkeitskreislauf mit Meßgeräten und Impfstationen zur a) Einimpfung von lvalksuspension und b) Impfung von Chlorionen, vorzugsweise IICrl, vcrsehrn istClaim 3: Method according to Claims 1 to 3, characterized in that that the washing liquid circuit with measuring devices and vaccination stations for a) inoculation of calcium suspension and b) inoculation of chlorine ions, preferably IICrl is
DE19742425324 1974-05-24 1974-05-24 Method for cleaning SO? 2? -Containing flue gases using a wet electrostatic precipitator Expired DE2425324C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742425324 DE2425324C2 (en) 1974-05-24 1974-05-24 Method for cleaning SO? 2? -Containing flue gases using a wet electrostatic precipitator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742425324 DE2425324C2 (en) 1974-05-24 1974-05-24 Method for cleaning SO? 2? -Containing flue gases using a wet electrostatic precipitator

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DE2425324A1 true DE2425324A1 (en) 1975-11-27
DE2425324C2 DE2425324C2 (en) 1983-12-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3300490A1 (en) * 1982-12-30 1984-07-12 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Flue gas desulphurisation with 2-stage separation, the 2nd stage being a wet electrostatic precipitator operated under alkaline conditions
DE3313523A1 (en) * 1983-04-14 1984-10-18 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Flue gas desulphurisation with a divided E-filter arrangement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386798A (en) * 1964-11-30 1968-06-04 American Standard Inc Method of removing sulfur compounds and precovering heat from combustion gases
DE2148902A1 (en) * 1970-11-28 1972-05-31 Masuda Senichi Electric exhaust gas purification device
DE1951554B2 (en) * 1968-12-31 1972-08-24 Combustion Engineering, Ine , Windsor, Conn (V St A ) PROCESS FOR THE REMOVAL OF SULFUR OXYDE FROM THE SMOKE GASES OF AN INCINERATOR
DE2323508A1 (en) * 1973-05-10 1974-11-28 Heinz Hoelter PROCESS FOR SCRUBBISHING SO2, HC1, FLUORINE, DUST AND SIMILAR SMOKE GAS COMPANIES
DE2415693A1 (en) * 1974-04-01 1975-10-02 Heinz Hoelter Purification of gas mixts contg sulphur dioxide - by scrubbing with aq soln contg calcium carbonate, hydroxide, oxide and chloride

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386798A (en) * 1964-11-30 1968-06-04 American Standard Inc Method of removing sulfur compounds and precovering heat from combustion gases
DE1951554B2 (en) * 1968-12-31 1972-08-24 Combustion Engineering, Ine , Windsor, Conn (V St A ) PROCESS FOR THE REMOVAL OF SULFUR OXYDE FROM THE SMOKE GASES OF AN INCINERATOR
DE2148902A1 (en) * 1970-11-28 1972-05-31 Masuda Senichi Electric exhaust gas purification device
DE2323508A1 (en) * 1973-05-10 1974-11-28 Heinz Hoelter PROCESS FOR SCRUBBISHING SO2, HC1, FLUORINE, DUST AND SIMILAR SMOKE GAS COMPANIES
DE2327967A1 (en) * 1973-05-10 1974-12-19 Heinz Hoelter METHODS FOR SEPARATING DUST, SO DEEP 2, FLUORINE AND SIMILAR POLLUTANTS FROM SMOKE GASES
DE2415693A1 (en) * 1974-04-01 1975-10-02 Heinz Hoelter Purification of gas mixts contg sulphur dioxide - by scrubbing with aq soln contg calcium carbonate, hydroxide, oxide and chloride

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Lehrbuch der Anorganischen Chemie von H.Remy, 13. Aufl. (1970), Bd.I, Seite 311 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3300490A1 (en) * 1982-12-30 1984-07-12 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Flue gas desulphurisation with 2-stage separation, the 2nd stage being a wet electrostatic precipitator operated under alkaline conditions
DE3313523A1 (en) * 1983-04-14 1984-10-18 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Flue gas desulphurisation with a divided E-filter arrangement

Also Published As

Publication number Publication date
DE2425324C2 (en) 1983-12-01

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