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DE3300490A1 - Flue gas desulphurisation with 2-stage separation, the 2nd stage being a wet electrostatic precipitator operated under alkaline conditions - Google Patents

Flue gas desulphurisation with 2-stage separation, the 2nd stage being a wet electrostatic precipitator operated under alkaline conditions

Info

Publication number
DE3300490A1
DE3300490A1 DE19833300490 DE3300490A DE3300490A1 DE 3300490 A1 DE3300490 A1 DE 3300490A1 DE 19833300490 DE19833300490 DE 19833300490 DE 3300490 A DE3300490 A DE 3300490A DE 3300490 A1 DE3300490 A1 DE 3300490A1
Authority
DE
Germany
Prior art keywords
flue gas
electrostatic precipitator
stage
wet
gas desulphurisation
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
DE19833300490
Other languages
German (de)
Inventor
Heribert Dipl.-Ing. 4390 Gladbeck Dewert
Heinrich Ing.(grad.) 4600 Dortmund Gresch
Heinz Dipl.-Ing. Hölter
Heinrich Dipl.-Ing. 4390 Gladbeck Igelbüscher
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 DE19823248567 external-priority patent/DE3248567A1/en
Application filed by Individual filed Critical Individual
Priority to DE19833300490 priority Critical patent/DE3300490A1/en
Priority to DE19833312978 priority patent/DE3312978A1/en
Publication of DE3300490A1 publication Critical patent/DE3300490A1/en
Ceased legal-status Critical Current

Links

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
    • B01D53/48—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
    • 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
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • 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
    • B03C3/019—Post-treatment of gases

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  • 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

The invention relates to a process for eliminating acid pollutants from flue gas desulphurisation plants according to the main application P 3248567.0. Since the exhaust gas is cooled to below the dew point in the wet scrubbing of the flue gas desulphurisation plant, and as a consequence corrosion can occur on the dry electrostatic precipitator, according to the invention it is proposed that the flue gas desulphurisation process comprises a wet, mechanical flue gas desulphurisation step (3) which is initially impinged, and a wet electrostatic precipitator (4) provided downstream. The electrostatic precipitator (4) is impinged with an alkaline washing solution (5), which is introduced into the mechanical washing step (3). <IMAGE>

Description

Beschreibung und Erläuterung zur Zusatz-Patent-Description and explanation of the additional patent

anmeldung "Rauchgasentschwefelung mit 2-stufiger Abscheidung, wobei die 2. Stufe ein alkalisch betriebenes Naßelektrofilter ist" Zusatzpatentanmeldung zu P 32 48 567.0 In der Hauptanmeldung P 32 48 567.0 wird ein Verfahren beschrieben, daß bei der S02-Waschung gleichzeitig SO, im Reingasteil der Naßentschwefelungsanlagc, jedoch vor dem E-Filter durch Nachoxidation gebildet wird, um einen maximalen Abscheidegrad des E-Filters zu erreichen.registration "flue gas desulfurization with 2-stage separation, whereby the 2nd stage of an alkaline-operated wet electrostatic precipitator is "additional patent application Re P 32 48 567.0 The main application P 32 48 567.0 describes a method that during the SO2 scrubbing at the same time SO, in the clean gas part of the wet desulfurization system, however, before the E-filter is formed by post-oxidation, in order to achieve a maximum degree of separation of the E-filter.

In der Naßwäsche der Rauchgasentschwefelungsanlage wird naturgemäß das Abgas bis unterhalb des Taupunktes abgekühlt, und infolgedessen können Korrosionen am trockenen E-Filter entstehen.In the wet scrubbing of the flue gas desulphurisation system, naturally the exhaust gas to below of the dew point cooled, and as a result Corrosion can occur on the dry E-filter.

Um dieses zu vermeiden, wird erfindungsgemäß vorgeschlagen, Naßelektrofilter zu verwenden, die mit alkalischer Waschlösung betrieben werden.To avoid this, the invention proposes a wet electrostatic precipitator to use which are operated with alkaline washing solution.

Erfindungsgemäß wird weiterhin vorgeschlagen, daß die stark alkalische Lösung zuerst als Waschlösung auf das E-Filter aufgegeben wird, und dann die aus dem Naß-Elektrofilter ablaufende Waschlösung den Naßwäschern der Rauchgasentschwefelungsanlage zugeführt wird.According to the invention it is also proposed that the strongly alkaline Solution is first applied as a washing solution to the E-filter, and then the off the scrubbing solution running off the wet electrostatic precipitator to the wet scrubbers of the flue gas desulfurization system is fed.

Hierdurch sind die Korrosionsprobleme beseitigt, da das Naßelektrofilter auch gleichzeitig als Tropfenabscheider wirkt.This eliminates the corrosion problems, as the wet electrostatic precipitator also acts as a droplet separator at the same time.

In der beiliegenden Zeichnung ist dargestellt: mit (1) das Kraftwerk, mit (2) die Abgase aus dem Kraftwerk, die gereinigt werden müssen, mit (3) die normale Rauchgasentschwefelung -Naßverfahren, mechanische Waschstufe -mit (4) das Naßelektrofilter, mit (5) die Zugabe des alkalischen Additivs, zuerst in das Naßelektrofilter (4), mit (6) die Additivrückführung in die S02-Rauchgasreinigung (3), mit (7) die obergabe der abgekühlten Rauchgase vorzugsweise in einen Kühlturm hinein.The attached drawing shows: with (1) the power plant, with (2) the exhaust gases from the power plant that need to be cleaned, with (3) the normal flue gas desulphurization - wet process, mechanical scrubbing stage -with (4) the wet electrostatic precipitator, with (5) the addition of the alkaline additive, first into the wet electrostatic precipitator (4), with (6) the additive return to the SO2 flue gas cleaning system (3), with (7) the transfer of the cooled flue gases, preferably into a cooling tower into it.

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, hinter der nassen Entschwefelungseinrichtung ein Naßelektrofilter nachzuschalten, das mit einer alkalischen Waschlösung betrieben wird, die vorzugsweise nach dem Durchlaufen eines Naßelektrofilters der normalen nassen Rauchgasentschwefelung zugeführt wird.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 behind the to connect a wet electrostatic precipitator downstream of the wet desulphurisation device, the is operated with an alkaline washing solution, which is preferably after passing through a wet electrostatic precipitator is fed to the normal wet flue gas desulfurization.

Zusatz-Patentansprüche: - L e e r s e i t eAdditional claims: - L e r s e i t e

Claims (1)

Zusatz-Patentansprüche: Anspruch S Verfahren zur Beseitigung von sauren Schadstoffen aus Rauchgasentschwefelungsanlagen nach Hauptanmeldung 32 48 567.0 dadurch gekennzeichnet, daß das Rauchgasentschwefelungsverfahren aus einer zuerst beaufschlagten nassen mechanischen Rauchgasentschwefelungsstufe (3) besteht und einem nachgeschalteten nassen Elektrofilter (4) besteht.Additional claims: Claim S method for the elimination of acidic Pollutants from flue gas desulphurisation systems according to main registration 32 48 567.0 characterized in that the flue gas desulfurization process consists of a first applied wet mechanical flue gas desulfurization stage (3) and a downstream wet electrostatic precipitator (4). Anspruch 2 Verfahren zur Beseitigung von sauren Schadstoffen aus Rauchgasentschwefelungsanlagen nach Anspruch 1 dadurch gekennzeichnet, daß das Elektrofilter (4) mit einer alkalischen Waschlösung (5) beaufschlagt wird, die als (6) in die mechanische Waschstufe (3) eingeleitet wird.Claim 2 method for removing acidic pollutants from flue gas desulfurization systems according to claim 1, characterized in that the electrostatic filter (4) with an alkaline Washing solution (5) is applied, which as (6) in the mechanical washing stage (3) is initiated.
DE19833300490 1982-12-30 1983-01-08 Flue gas desulphurisation with 2-stage separation, the 2nd stage being a wet electrostatic precipitator operated under alkaline conditions Ceased DE3300490A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19833300490 DE3300490A1 (en) 1982-12-30 1983-01-08 Flue gas desulphurisation with 2-stage separation, the 2nd stage being a wet electrostatic precipitator operated under alkaline conditions
DE19833312978 DE3312978A1 (en) 1982-12-30 1983-04-12 Flue gas purification, preferably for fossil power stations, having two electrostatic precipitators and a flue gas purification plant arranged between the electrostatic precipitators

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823248567 DE3248567A1 (en) 1982-12-30 1982-12-30 Process for the purification of flue gases, preferably from coal power stations
DE19833300490 DE3300490A1 (en) 1982-12-30 1983-01-08 Flue gas desulphurisation with 2-stage separation, the 2nd stage being a wet electrostatic precipitator operated under alkaline conditions

Publications (1)

Publication Number Publication Date
DE3300490A1 true DE3300490A1 (en) 1984-07-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833300490 Ceased DE3300490A1 (en) 1982-12-30 1983-01-08 Flue gas desulphurisation with 2-stage separation, the 2nd stage being a wet electrostatic precipitator operated under alkaline conditions

Country Status (1)

Country Link
DE (1) DE3300490A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592025A1 (en) * 1992-10-03 1994-04-13 Metallgesellschaft Ag Process for seperating halogenated dioxins and furans from exhaust gases from combustion devices

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2148902A1 (en) * 1970-11-28 1972-05-31 Masuda Senichi Electric exhaust gas purification device
DE2425324A1 (en) * 1974-05-24 1975-11-27 Heinz Hoelter Sulphur dioxide-contg gas purificn with wet electrofilter - using lime water cycle with excess chloride ions, preventing deactivation
DE2549896A1 (en) * 1974-11-06 1976-05-13 Sumitomo Chemical Co PROCEDURE FOR REMOVING NITROGEN OXIDES FROM EXHAUST GAS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2148902A1 (en) * 1970-11-28 1972-05-31 Masuda Senichi Electric exhaust gas purification device
DE2425324A1 (en) * 1974-05-24 1975-11-27 Heinz Hoelter Sulphur dioxide-contg gas purificn with wet electrofilter - using lime water cycle with excess chloride ions, preventing deactivation
DE2549896A1 (en) * 1974-11-06 1976-05-13 Sumitomo Chemical Co PROCEDURE FOR REMOVING NITROGEN OXIDES FROM EXHAUST GAS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592025A1 (en) * 1992-10-03 1994-04-13 Metallgesellschaft Ag Process for seperating halogenated dioxins and furans from exhaust gases from combustion devices

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