DE3235020A1 - Chemisorption process for absorbing preferably sulphur dioxide downstream of power stations, refuse incineration plants and the like - Google Patents

Chemisorption process for absorbing preferably sulphur dioxide downstream of power stations, refuse incineration plants and the like

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Publication number
DE3235020A1
DE3235020A1 DE19823235020 DE3235020A DE3235020A1 DE 3235020 A1 DE3235020 A1 DE 3235020A1 DE 19823235020 DE19823235020 DE 19823235020 DE 3235020 A DE3235020 A DE 3235020A DE 3235020 A1 DE3235020 A1 DE 3235020A1
Authority
DE
Germany
Prior art keywords
fed
lime
chemisorption
power stations
incineration plants
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
DE19823235020
Other languages
German (de)
Other versions
DE3235020C2 (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
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Priority to DE19823235020 priority Critical patent/DE3235020A1/en
Publication of DE3235020A1 publication Critical patent/DE3235020A1/en
Application granted granted Critical
Publication of DE3235020C2 publication Critical patent/DE3235020C2/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
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/508—Sulfur oxides by treating the gases with solids
    • 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
    • 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
    • B01D53/54—Nitrogen compounds
    • B01D53/56—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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  • 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 combined gas drying and chemisorption process for removing SO2, HCl, HF, NOx and similar pollutants from untreated gases downstream of power stations, refuse incineration plants or the like. A disadvantage of the known plants is that acid constituents possibly containing drop-like acidic moisture components penetrate the fibrous filters used in this process with the consequence that corrosion is unavoidable. To avoid this, the invention proposes that the untreated gas is fed into a suspension reactor (2) whose outlet is connected to a dry reactor (3) to which fresh lime (6) is fed, the lime being transferred to a precipitator, preferably a fibrous filter (4) and the used chemisorption agent (7), for example used lime, being fed to a suspension mixer (8) in order to be fed from that point to the spraying tower (2). The chemisorption agent (9) discharged can be reused or delivered to a waste-disposal site. <IMAGE>

Description

Beschreibung und Erläuterung zur PatentanmeldungDescription and explanation of the patent application

"Chemisorptionsverfahren zur Absorption von vorzugsweise Schwefeldioxid hinter Kraftwerken und Müllverbrennungsanlagen und dergleichen"."Chemisorption process for the absorption of preferably sulfur dioxide behind power plants and waste incineration plants and the like ".

Es ist bekannt, Trockenadditive in Wirbelbettreaktoren, Kontaktstrecken und ähnlichen Kontakteinrichtungen aufzugeben und hinter diesen Kontakteinrichtungen - wo der Frischkalk mit dem Schwefeldioxid in Kontakt gebracht wird - die Gewebefilter nachzuschalten, die dann den reagierten und/oder nicht reagierten Kalk abscheiden.It is known to use dry additives in fluidized bed reactors, contact sections and similar contact devices and behind these contact devices - where the fresh lime is brought into contact with the sulfur dioxide - the fabric filters downstream, which then deposit the reacted and / or unreacted lime.

Um die Reaktion in den Kontakteinbauten zu verbessern, wird vielfach Dampf zugegeben oder ein Sprühturm verwendet, bei dem eine Suspension aufgegeben wird, die einen Feststoffgehalt von ungefähr 35 % besitzt.In order to improve the reaction in the built-in contacts, many times Steam added or a spray tower used, in which a suspension is applied which has a solids content of approximately 35%.

Es läßt sich nicht vermeiden, daß nicht genügend SO, -trotz eingesprühter Suspension - im Sprühturm abgeschieden wird- und infolgedessen saure Bestandteile mit evtl. tröpfchenartigen, sauren Feuchtigkeitsanteilen in den Bereich des nachgeschalteten Gewebefilters eindringen.It cannot be avoided that not enough SO, -in spite of the sprayed in Suspension - is deposited in the spray tower - and, as a result, acidic components with possibly droplet-like, acidic moisture in the area of the downstream Penetrate the fabric filter.

Hier sind aufgrund dieser Tatsache Korrosionen die unabdingbare Folge.Because of this, corrosion is the inevitable consequence.

Um diesen Nachteil zu vermeiden, wird erfindungsgemäß folgende Verfahrenstechnologie vorgeschlagen.In order to avoid this disadvantage, the following process technology is used according to the invention suggested.

In der beiliegenden Zeichnung ist dargestellt: mit (1) das Rohgas; mit (2) ein Sprühturm - in dem die nasse Suspension aufgegeben wird; mit (3) eine Kontaktstrecke oder ein Trockenreaktor, in dem Frischkalk (6) aufgegeben wird; mit (4) Gewebefilter; mit (5) der Ventilator; mit (6) der Frischkalk; mit (7) der zum Teil bei (3) aufgegebene, mit den Schadstoffen reagierte Frischkalk2 der als Altkalk zum Mischer (8) geführt wird und mit Wasser zu einer Emulsion gemischt auf den Sprühturm (2) aufgegeben wird, mit (8) der Mischer; mit (9) der Austrag des mit S02, HC1, HF und weiteren Schadstoffen reagierten Kaltes; mit (do) Reingas zum Kamin.The accompanying drawing shows: with (1) the raw gas; with (2) a spray tower - in which the wet suspension is applied; with (3) a Contact section or a dry reactor in which fresh lime (6) is applied; with (4) bag filter; with (5) the fan; with (6) the fresh lime; with (7) the for Part of (3) abandoned, fresh lime2 reacted with the pollutants as old lime to the mixer (8) and mixed with water to form an emulsion on the spray tower (2) is abandoned, with (8) the mixer; with (9) the discharge of the cold reacted with SO2, HC1, HF and other pollutants; with (do) clean gas to Chimney.

Durch die erfindungsgemäße Zugabe des Friscbkalkes, nicht wie bisher üblich über einen Emulsionshersteller mit nachfolgender Aufgabe auf einen Sprühturm, sondern vorab bei (3) erfindungsgemäß in einer Kontaktstrecke oder einem trockenen Reaktor (z.B. Wirbelbettreaktor, rezirkulierender Reaktor oder dergleichen) wird der Frischkalk im weiteren Verlauf dann in einen Gewebefilter eingeführt und abgeschieden. Auf den Filterflächen absorbiert der abgeschiedene Kalk den Restanteil der im Rauchgas nach dem Sprühturm verbliebenen Schadstoffe, wirkt somit neutralisierend und alkalisierend, so daß das Gewebefilter in der bisher bekannten Korrosion dem Zubacken nicht mehr ausgesetzt ist.By adding the fresh lime according to the invention, not as before Usually via an emulsion manufacturer with the following task on a spray tower, but in advance at (3) according to the invention in a contact path or a dry one Reactor (e.g. fluidized bed reactor, recirculating reactor or the like) the fresh lime is then introduced into a fabric filter and deposited. The lime deposited on the filter surfaces absorbs the remaining portion of the flue gas pollutants remaining after the spray tower, thus has a neutralizing and alkalizing effect, so that the fabric filter no longer bakes in the previously known corrosion is exposed.

Die Reaktion im Trockenbereich - Kontaktstrecke (3) -als auch auf dem Gewebefilter (4) ist infolge der hohen Feuchte, die teilweise aus dem Sprühturm (2) in den Bereich (3) und (4) herübergerissen wird -sehr gut.The reaction in the dry area - contact section (3) - as well the fabric filter (4) is due to the high humidity, which is partly from the spray tower (2) is torn over into area (3) and (4) - very well.

Durch die Übergabe in den Sprühturm, durch Aufmischen über den Mischer (8), wird im Prinzip eine doppelte Abscheideleistung von Schadstoffen mit a) großer Verfügbarkeit und b) hoher Abscheideleistung erzielt.By transferring it to the spray tower, by mixing it up via the mixer (8), there is in principle a double separation efficiency of pollutants with a) large Availability and b) high separation efficiency achieved.

Versuche haben gezeigt, daß Abscheideraten bis zu 99 % erzielt werden können.Tests have shown that separation rates of up to 99% can be achieved can.

Patentanspruch: LeerseiteClaim: Blank page

Claims (1)

Patentanspruch: Anspruch 1 kombiniertes Gas-Trockenchemisorptionsverfahren zur Abscheidung von SO2, Hel, HF, NOX und ähnlichen Schadstoffen aus Rohgasen hinter Eraftwerken, Müllverbrennungsanlagen und dergleichen dadurch gekennzeichnet, daß das Verfahren aus einem Suspensionsreaktor (2) besteht, dem ein Trockenreaktor (3) nachgeschaltet ist, in dem Friscbkalk (6) zugeführt wird, der einem nachgeschalteten Abscheider, vorzugsweise Gewebefilter (4), übergeben wird und das gebrauchte Chemisorptionsmittel (7), z.B. Altkalk, einem Suspensionsmischer (8) zugeführt wird, um von hier aus dem Sprühturm (2) zugeführt zu werden, wobei das ausgetragene Chemisorptionsmittel(9)einer Weiterverwendung oder einer Deponie zugeführt werden kann.Claim: Claim 1 combined gas-dry chemisorption process for the separation of SO2, Hel, HF, NOX and similar pollutants from raw gases behind Power plants, waste incineration plants and the like, characterized in that the process consists of a suspension reactor (2) to which a dry reactor (3) is downstream, in which fresh lime (6) is fed to a downstream Separator, preferably fabric filter (4), is passed and the used chemisorbent (7), e.g. old lime, is fed to a suspension mixer (8) from here to be fed to the spray tower (2), the discharged chemisorbent (9) a Re-use or can be sent to a landfill.
DE19823235020 1982-09-22 1982-09-22 Chemisorption process for absorbing preferably sulphur dioxide downstream of power stations, refuse incineration plants and the like Granted DE3235020A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823235020 DE3235020A1 (en) 1982-09-22 1982-09-22 Chemisorption process for absorbing preferably sulphur dioxide downstream of power stations, refuse incineration plants and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823235020 DE3235020A1 (en) 1982-09-22 1982-09-22 Chemisorption process for absorbing preferably sulphur dioxide downstream of power stations, refuse incineration plants and the like

Publications (2)

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DE3235020A1 true DE3235020A1 (en) 1984-03-22
DE3235020C2 DE3235020C2 (en) 1991-10-02

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0217733A1 (en) * 1985-09-30 1987-04-08 Mitsubishi Jukogyo Kabushiki Kaisha Process for the systematic treatment of exhaust gases
EP0226863A1 (en) * 1985-11-29 1987-07-01 General Electric Company Method for scrubbing sulfur oxides and nitrogen oxides in a flue gas duct
EP0253563A1 (en) * 1986-07-16 1988-01-20 Niro A/S A process for removal of mercury vapor and/or vapor of noxious organic compounds and/or nitrogen oxides from flue gas from an incinerator plant
EP0268353A1 (en) * 1986-11-19 1988-05-25 The Babcock & Wilcox Company Controlling emission of pollutants from coal-fired boiler systems
EP0273508A1 (en) * 1986-12-23 1988-07-06 Metallgesellschaft Ag Waste gas purification process
CN111603923A (en) * 2020-05-22 2020-09-01 朱文艳 Tertiary tail gas cleanup tower of high concentration nitrogen oxide

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610408A1 (en) * 1986-03-27 1987-10-01 Hoelter Heinz Two-stage semi-dry desulphurisation process
DE4419669A1 (en) * 1994-06-07 1995-12-14 Krc Umwelttechnik Gmbh Process for the separation of very fine particles from exhaust gases from wet combustion plants desulphurized with limestone

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT212290B (en) * 1956-09-12 1960-12-12 Wheelabrator Corp Method and device for removing gaseous halides, in particular fluorides, from gaseous systems
GB1429427A (en) * 1974-07-25 1976-03-24 Asahi Fibreglass Co Method of cleaning waste gases containing a fluorine component
DE2625280A1 (en) * 1975-06-06 1976-12-16 Us Energy METHOD FOR LIMITING SULFUR DIOXIDE EMISSIONS
DE2615828A1 (en) * 1976-04-10 1977-10-13 Heinz Hoelter Gas purificn. by addn. of absorbent - in series of stages with sepn. and recycling of absorbent after each stage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT212290B (en) * 1956-09-12 1960-12-12 Wheelabrator Corp Method and device for removing gaseous halides, in particular fluorides, from gaseous systems
GB1429427A (en) * 1974-07-25 1976-03-24 Asahi Fibreglass Co Method of cleaning waste gases containing a fluorine component
DE2625280A1 (en) * 1975-06-06 1976-12-16 Us Energy METHOD FOR LIMITING SULFUR DIOXIDE EMISSIONS
DE2615828A1 (en) * 1976-04-10 1977-10-13 Heinz Hoelter Gas purificn. by addn. of absorbent - in series of stages with sepn. and recycling of absorbent after each stage

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Forschungsbericht des Landes Nordrhein-Westfalen, Nr. 2907/Fachgruppe Umwelt/Verkehr, Dipl.-Ing. Paul Gerhard Schuch "Trockensorption von Chlorwasserstoff, Fluorwasserstoff und Schwefeldioxid aus Rauchgasen in einer halb- technischen Versuchsanlage", Westdeutscher Verlag,1980, S. 11-13, insbes. Abb. 5 auf S. 12 *
Gas Wärme International, 28, 4, 1979, S. 173-183 *
Staub Reinhaltung Luft 40, 7, 1980 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0217733A1 (en) * 1985-09-30 1987-04-08 Mitsubishi Jukogyo Kabushiki Kaisha Process for the systematic treatment of exhaust gases
EP0226863A1 (en) * 1985-11-29 1987-07-01 General Electric Company Method for scrubbing sulfur oxides and nitrogen oxides in a flue gas duct
EP0253563A1 (en) * 1986-07-16 1988-01-20 Niro A/S A process for removal of mercury vapor and/or vapor of noxious organic compounds and/or nitrogen oxides from flue gas from an incinerator plant
US4889698A (en) * 1986-07-16 1989-12-26 A/S Niro Atomizer Process for removal or mercury vapor and/or vapor of noxious organic compounds and/or nitrogen oxides from flue gas from an incinerator plant
EP0268353A1 (en) * 1986-11-19 1988-05-25 The Babcock & Wilcox Company Controlling emission of pollutants from coal-fired boiler systems
EP0468540A1 (en) * 1986-11-19 1992-01-29 The Babcock & Wilcox Company Controlling emission of pollutants from coal-fired boiler systems
EP0273508A1 (en) * 1986-12-23 1988-07-06 Metallgesellschaft Ag Waste gas purification process
US4908195A (en) * 1986-12-23 1990-03-13 Metallgesellschaft Aktiengesellschaft Process of purifying exhaust gas
CN111603923A (en) * 2020-05-22 2020-09-01 朱文艳 Tertiary tail gas cleanup tower of high concentration nitrogen oxide

Also Published As

Publication number Publication date
DE3235020C2 (en) 1991-10-02

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