DE3601454A1 - Process for removing HCl, HF, SO3, SO2 and NOx from combustion exhaust gases by simultaneous wet scrubbing with controlled scrubbing water circulation and specific addition of lime - Google Patents

Process for removing HCl, HF, SO3, SO2 and NOx from combustion exhaust gases by simultaneous wet scrubbing with controlled scrubbing water circulation and specific addition of lime

Info

Publication number
DE3601454A1
DE3601454A1 DE19863601454 DE3601454A DE3601454A1 DE 3601454 A1 DE3601454 A1 DE 3601454A1 DE 19863601454 DE19863601454 DE 19863601454 DE 3601454 A DE3601454 A DE 3601454A DE 3601454 A1 DE3601454 A1 DE 3601454A1
Authority
DE
Germany
Prior art keywords
lime
wash water
iron
water
scrubbing
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
DE19863601454
Other languages
German (de)
Inventor
Heinz Dipl Ing Hoelter
Heinrich Dipl Ing Igelbuescher
Heinrich Ing Grad Gresch
Heribert Dipl Ing Dewert
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
Application filed by Individual filed Critical Individual
Priority to DE19863601454 priority Critical patent/DE3601454A1/en
Priority to EP87900093A priority patent/EP0248855A1/en
Priority to PCT/EP1986/000693 priority patent/WO1987003506A2/en
Publication of DE3601454A1 publication Critical patent/DE3601454A1/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
    • B01D53/60—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

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

In the main application P3525051.8, it is proposed to remove SO2 and NOx from combustion exhaust gases by using a wet circulation scrubbing, the scrubbing water of which contains iron (II) EDTA complex or iron (II) NTA complex. To keep the iron (II) complex within the scrubbing solution, reducing agents are added or scrubbing water treatments are carried out in the bypass in order to reduce again the iron oxidised in the chelate complex by atmospheric oxygen from iron (II) to iron (III) and thus to minimise the use of expensive reducing agents. In order further to improve the process according to the main application, in particular with regard to decreasing the consumption of reducing agent, according to the invention it is proposed that hydrated lime or limestone (5) is added into the suction line of the scrubbing water circulation (6). The amount of lime addition is stoichiometrically controlled in accordance with the flue gas pollutant rate. A portion of water from the main scrubbing water circulation is fed via a line (7) to a gravity separator (13) to separate out solids. The part-stream water volume freed from solids is returned to the scrubber sump. The solids (approximately 30%) thickened in the gravity separator (13) are dewatered via a dewatering station (9),... Original abstract incomplete. <IMAGE>

Description

Es ist bekannt gemäß Hauptanmeldung P 35 25 051.8, SO2 und NO x aus Verbrennungsabgasen durch Einsatz einer Naß-Kreislaufwäsche, deren Waschwasser Eisen-II EDTA­ oder Eisen-II-NTA-Komplex enthält, zu reinigen.It is known from main application P 35 25 051.8 to clean SO 2 and NO x from combustion exhaust gases by using a wet cycle scrubber, the wash water of which contains iron-II EDTA or iron-II-NTA complex.

Zur Erhaltung des Eisen-II-Komplexes innerhalb der Waschlösung werden Reduktionsmittel zugesetzt oder Waschwasseraufbereitungen im Bypass betrieben, um das durch den Luftsauerstoff von Eisen-II zu Eisen-III im Chelatkomplex aufoxidierte Eisen wieder zu redu­ zieren und somit den Einsatz an teueren Reduktions­ mitteln zu minimieren.To preserve the iron II complex within the Reducing agents are added to the washing solution or Wash water preparation operated in the bypass to the through atmospheric oxygen from iron-II to iron-III iron reoxidized in the chelate complex adorn and thus the use of expensive reduction to minimize means.

Es wurde gefunden, daß durch das nachstehend beschriebene vereinfachte Verfahren die simultane SO2/NO x -Entfernung technisch und kostengünstig, bei geringem Reduktions­ mittelverbrauch und modifiziertem Waschwasserkreislauf und Kalkdosierung erfolgreich durchgeführt werden kann.It has been found that the simultaneous SO 2 / NO x removal can be carried out technically and inexpensively, with low consumption of reducing agents and modified washing water circuit and lime dosing, using the simplified method described below.

Für die simultane SO2/NO x Naßwäsche mit integrierter Waschwasseraufbereitung wird erfindungsgemäß nachfolgend beschriebenes Verfahren entsprechend beiliegender Zeichnung eingesetzt.For the simultaneous SO 2 / NO x wet washing with integrated washing water treatment, the method described below according to the invention is used in accordance with the attached drawing.

Im Wäscher (1) wird das eintretende Rohgas (2) mit im Kreislauf geführtem Waschwasser über eine Pumpe und die Waschkreislaufleitung (4) gewaschen und verläßt von Schadstoffen befreit, über die Reingas­ leitung (3) den Wäscher.In the scrubber ( 1 ), the incoming raw gas ( 2 ) is washed with circulated wash water via a pump and the scrubbing circuit line ( 4 ) and freed of pollutants, via the clean gas line ( 3 ) the scrubber.

Der Zusatz von Kalkhydrat oder Kalkstein (5) erfolgt in die Saugleitung der Waschwasserkreislaufpumpe (6). Die Kalkzusatzmenge erfolgt entsprechend der Rauchgas­ schadstoffmenge stöchiometrisch gesteuert. Um eine Anreicherung der sich im Waschkreislauf bildenden Feststoffe Calciumsulfatdihydrat und Calciumsulfit zu verhindern, wird eine Teilwassermenge aus dem Haupt­ waschwasserkreislauf zur Ausscheidung von Feststoffen über die Leitung (7) einem Schwerkraftabscheider (13) zugeführt. Die von Feststoffen befreite Teilstrom­ wassermenge wird in den Waschersumpf zurückgeführt. Die Umführung dieser Teilwassermenge ist ein ge­ schlossener Kreislauf. Der im Schwerkraftabscheider (13) eingedickte Feststoff (ca. 30%) wird über eine Entwässerungsstation (9) entwässert. Der entwässerte Feststoff wird ausgetragen (10) und einer Oxidations­ station zugeführt, um den Calciumsulfitanteil in Calciumsulfatdihydrat zu wandeln, und das Filtrat wird über die Leitung (11) in den Schwerkraftabscheider zurückgeführt.Lime hydrate or limestone ( 5 ) is added to the suction line of the wash water circulation pump ( 6 ). The amount of lime added is controlled stoichiometrically according to the amount of flue gas and pollutants. In order to prevent an accumulation of the solids forming in the washing circuit calcium sulfate dihydrate and calcium sulfite, a part of the water from the main wash water circuit for the separation of solids is fed via line ( 7 ) to a gravity separator ( 13 ). The partial flow of water freed from solids is returned to the washer sump. The bypassing of this partial water volume is a closed cycle. The solid (approx. 30%) thickened in the gravity separator ( 13 ) is dewatered via a dewatering station ( 9 ). The dewatered solid is discharged ( 10 ) and fed to an oxidation station in order to convert the calcium sulfite fraction into calcium sulfate dihydrate, and the filtrate is returned via line ( 11 ) to the gravity separator.

Der Zusatz von Reduktionsmitteln erfolgt in dem Innenmantel des Schwerkraftabscheiders (13), da gefunden wurde, daß für die Reduktion von Eisen III zu Eisen II eine ausreichende Verweilzeit vorhanden sein muß. The addition of reducing agents takes place in the inner jacket of the gravity separator ( 13 ), since it was found that there must be a sufficient dwell time for the reduction of iron III to iron II.

Bei Untersuchungen über die Kalkverteilung im Wasch­ wasser wurde überraschend gefunden, daß die Kalkzugabe nicht in einen Teilwasserkreislaufstrom mit Fällbehälter zugegeben werden darf, da sonst die Kalkbelastung pro Liter Waschwasser zu hoch ist, (z. . 1,5-6,0 g Ca(OH)₂/l Waschwasser). Dadurch können sich örtlich pH-Werte bis pH 12 im Waschwasser einstellen, und es kann zur Störung des Sulfit-Sulfatverhältnisses führen. Außerdem kann es auch zu geringem Eisenabbau aus dem Eisenchelatkomplex kommen.In studies of the lime distribution in the wash Surprisingly, water was found to add lime not in a partial water circuit stream with a precipitation tank may be added, otherwise the lime load per Liters of wash water is too high (e.g. 1.5-6.0 g Ca (OH) ₂ / l Wash water). This can cause local pH values up to Adjust pH 12 in the wash water and it can cause a malfunction of the sulfite-sulfate ratio. Besides, it can too little iron degradation from the iron chelate complex come.

Erfindungsgemäß muß die Kalkzugabe über den gesamten Waschwasserkreislauf erfolgen. Das geschieht vorteilhaft über die Dosierung in die Saugleitung bzw. in den Pumpenvorlagenbehälter (5) der Waschwasserkreislauf­ pumpen.According to the invention, the lime must be added over the entire wash water circuit. This is done advantageously via the metering in the suction line or in the pump reservoir ( 5 ) of the wash water circuit.

Die Waschwasserkreislaufmenge muß entsprechend der stöchiometrischen Kalkzusatzmenge so bemessen sein, daß die Waschwasserkalkbelastung=<0,5 g Ca(OH)₂/l Waschwasser nicht überschritten wird.The wash water cycle quantity must correspond to the the stoichiometric amount of lime added should be such that the washing water lime load = <0.5 g Ca (OH) ₂ / l Wash water is not exceeded.

Claims (4)

1. Vereinfachtes Verfahren zur simultanen SO2/NO x - Entfernung aus Rauchgasen mit integrierter Wasser­ behandlung und Kalkzugabe nach Hauptanmeldung P 35 25 051.8 und entsprechend beiliegender Zeichnung dadurch gekennzeichnet, daß der Zusatz von Kalkhydrat oder Kalkstein (5) in die Saugleitung der Waschwasserkreislaufpumpe (6) erfolgt. Die Kalkzusatzmenge erfolgt entsprechend der Rauch­ gasschadstoffmenge stöchiometrisch gesteuert. Um eine Anreicherung der sich im Waschkreislauf bildenden Fest­ stoffe Calciumsulfatdihydrat und Calciumsulfit zu ver­ hindern, wird eine Teilwassermenge aus dem Hauptwasch­ wasserkreislauf zur Ausscheidung von Feststoffen über die Leitung (7) einem Schwerkraftabscheider (13) zuge­ führt. Die von Feststoffen befreite Teilstromwasser­ menge wird in den Waschersumpf zurückgeführt. Die Umführung dieser Teilwassermenge ist ein geschlossener Kreislauf. Der im Schwerkraftabscheider (13) eingedickte Feststoff (ca. 30%) wird über eine Entwässerungs­ station (9) entwässert. Der entwässerte Feststoff wird ausgetragen (10) und einer Oxidationsstation zugeführt, um den Calciumsulfitanteil in Calciumsulfat­ dihydrat zu wandeln, und das Filtrat wird über die Leitung (11) in den Schwerkraftabscheider zurück­ geführt. Der Zusatz von Reduktionsmitteln erfolgt in dem Innenmantel des Schwerkraftabscheiders (13), da gefunden wurde, daß für die Reduktion von Eisen III zu Eisen II eine ausreichende Verweilzeit vorhanden sein muß. Bei Untersuchungen über die Kalkverteilung im Wasch­ wasser wurde überraschend gefunden, daß die Kalkzugabe nicht in einen Teilwasserkreislaufstrom mit Fällbe­ hälter zugegeben werden darf, da sonst die Kalkbe­ lastung pro Liter Waschwasser zu hoch ist (z. B. 1,5-6,0 g Ca(OH)₂/l Waschwasser). Dadurch können sich örtlich pH-Werte bis pH 12 im Waschwasser einstellen, und es kann zur Störung des Sulfit-Sulfatverhältnisses führen. Außerdem kann es auch zu geringem Eisenabbau aus dem Eisenchelatkomplex kommen. Erfindungsgemäß muß die Kalkzugabe über den gesamten Waschwasserkreislauf erfolgen. Das geschieht vorteilhaft über die Dosierung in die Saugleitung bzw. in den Pumpenvorlagenbehälter (5) der Waschwasserkreislauf­ pumpen. Die Waschwasserkreislaufmenge muß entsprechend der stöchiometrischen Kalkzusatzmenge so bemessen sein, daß die Waschwasserkalkbelastung=<0,5 g Ca(OH)₂/l Waschwasser nicht überschritten wird.1. Simplified process for simultaneous SO 2 / NO x removal from flue gases with integrated water treatment and addition of lime according to main application P 35 25 051.8 and according to the attached drawing, characterized in that the addition of hydrated lime or limestone ( 5 ) into the suction line of the wash water circulation pump ( 6 ) is done. The amount of lime added is controlled stoichiometrically according to the amount of flue gas pollutant. In order to prevent accumulation of the solid matter formed in the washing circuit calcium sulfate dihydrate and calcium sulfite, a part of the water from the main wash water circuit for the separation of solids via the line ( 7 ) leads to a gravity separator ( 13 ). The partial flow water freed from solids is returned to the washer sump. The bypassing of this partial water quantity is a closed cycle. The solidified in the gravity separator ( 13 ) (approx. 30%) is dewatered via a dewatering station ( 9 ). The dewatered solid is discharged ( 10 ) and sent to an oxidation station to convert the calcium sulfite portion to calcium sulfate dihydrate, and the filtrate is returned to the gravity separator via line ( 11 ). The addition of reducing agents takes place in the inner jacket of the gravity separator ( 13 ), since it was found that there must be a sufficient dwell time for the reduction of iron III to iron II. In studies of the lime distribution in the wash water, it was surprisingly found that the lime addition must not be added to a partial water cycle with precipitation containers, since otherwise the lime load per liter of wash water is too high (e.g. 1.5-6.0 g Ca (OH) ₂ / l wash water). This can result in local pH values of up to pH 12 in the wash water and can lead to a disruption of the sulfite-sulfate ratio. In addition, there may also be little iron degradation from the iron chelate complex. According to the invention, the lime must be added over the entire wash water circuit. This is done advantageously via the metering in the suction line or in the pump reservoir ( 5 ) of the wash water circuit. The wash water cycle quantity must be dimensioned according to the stoichiometric amount of lime added so that the wash water lime load = <0.5 g Ca (OH) ₂ / l wash water is not exceeded. 2. Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß die Kalkzugabe zum Waschwasserkreislauf über den gesamten Waschwasserkreislauf geführt wird.2. The method according to claim 1, characterized in that the addition of lime to the wash water circuit via the entire wash water cycle is performed. 3. Verfahren nach Anspruch 1-2 dadurch gekennzeichnet, daß durch den stöchiometrischen Kalkzusatz die Wasch­ wasserbelastung nur <0,5 g Ca (OH)₂/l Waschwasser betragen darf. 3. The method according to claim 1-2, characterized in that the washing by the stoichiometric addition of lime water pollution only <0.5 g Ca (OH) ₂ / l wash water may be.   4. Verfahren nach Anspruch 1-3 dadurch gekennzeichnet, daß durch die Waschwasserkreislaufführung mit Feststoffen (CaSO4 · 2 H2O/CaSO3 · 1/2 H2O) als Impfkristalle eine Gipsübersättigung der Waschlösung verhindert wird.4. The method according to claim 1-3, characterized in that gypsum oversaturation of the washing solution is prevented by the washing water circuit with solids (CaSO 4 · 2 H 2 O / CaSO 3 · 1/2 H 2 O) as seed crystals.
DE19863601454 1985-12-04 1986-01-20 Process for removing HCl, HF, SO3, SO2 and NOx from combustion exhaust gases by simultaneous wet scrubbing with controlled scrubbing water circulation and specific addition of lime Ceased DE3601454A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19863601454 DE3601454A1 (en) 1986-01-20 1986-01-20 Process for removing HCl, HF, SO3, SO2 and NOx from combustion exhaust gases by simultaneous wet scrubbing with controlled scrubbing water circulation and specific addition of lime
EP87900093A EP0248855A1 (en) 1985-12-04 1986-11-29 PROCESS FOR SINGLE OR MULTI-PHASE PREFERABLY SIMULTANEOUS SO 2? AND NO x? SEPARATION FROM FLUE GASES IN A WET PROCESS
PCT/EP1986/000693 WO1987003506A2 (en) 1985-12-04 1986-11-29 PROCESS FOR SINGLE OR MULTI-PHASE PREFERABLY SIMULTANEOUS SO2 AND NOx SEPARATION FROM FLUE GASES IN A WET PROCESS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863601454 DE3601454A1 (en) 1986-01-20 1986-01-20 Process for removing HCl, HF, SO3, SO2 and NOx from combustion exhaust gases by simultaneous wet scrubbing with controlled scrubbing water circulation and specific addition of lime

Publications (1)

Publication Number Publication Date
DE3601454A1 true DE3601454A1 (en) 1987-07-30

Family

ID=6292167

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863601454 Ceased DE3601454A1 (en) 1985-12-04 1986-01-20 Process for removing HCl, HF, SO3, SO2 and NOx from combustion exhaust gases by simultaneous wet scrubbing with controlled scrubbing water circulation and specific addition of lime

Country Status (1)

Country Link
DE (1) DE3601454A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2460231A1 (en) * 1973-12-27 1975-07-03 Chisso Eng Co Ltd PROCESS FOR THE REMOVAL OF NITROGEN OXIDES FROM INDUSTRIAL EXHAUST GASES AND SUITABLE AQUATIC TREATMENT SOLUTIONS
DE2619145A1 (en) * 1975-05-06 1976-11-25 Fuji Kasui Eng Co Ltd PROCESS FOR SEPARATING NITROGEN OXYDES AND SIMULTANEOUSLY SEPARATING NITROGEN OXYDE AND SULFUR OXYDE FROM EXHAUST GASES
DE3240317A1 (en) * 1982-10-30 1984-05-03 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen METHOD FOR PRODUCING CALCIUM SULFATE DIHYDRATE IN THE DESULFURATION OF SMOKE GASES
DE3241540A1 (en) * 1982-11-10 1984-05-10 L. & C. Steinmüller GmbH, 5270 Gummersbach METHOD FOR THE CONTINUOUS REMOVAL OF WASHING SUSPENSION WITH INCREASED SOLIDS CONCENTRATION FROM A WASHING TOWER OF A SMOKE GAS DESULPATION SYSTEM WORKING WITH LIME OR LIMESTONE AS AN ABSORPTION AGENT
DE3245754A1 (en) * 1982-12-10 1984-07-19 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen METHOD FOR PRODUCING CALCIUM SULFATE DIHYDRATE IN THE DESULFURATION OF SMOKE GASES FROM POWER PLANT BOILERS AND THE LIKE
DE3305120A1 (en) * 1983-02-15 1984-08-16 Uhde Gmbh, 4600 Dortmund Process for flue gas purification
DE3241539C2 (en) * 1982-11-10 1985-08-01 L. & C. Steinmüller GmbH, 5270 Gummersbach Process to improve the formation of gypsum during wet flue gas desulphurisation with lime washing
DE3419611A1 (en) * 1984-05-25 1985-11-28 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Simultaneous scrubbing of SO2 and NOx from exhaust gases downstream of combustion plants

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2460231A1 (en) * 1973-12-27 1975-07-03 Chisso Eng Co Ltd PROCESS FOR THE REMOVAL OF NITROGEN OXIDES FROM INDUSTRIAL EXHAUST GASES AND SUITABLE AQUATIC TREATMENT SOLUTIONS
DE2619145A1 (en) * 1975-05-06 1976-11-25 Fuji Kasui Eng Co Ltd PROCESS FOR SEPARATING NITROGEN OXYDES AND SIMULTANEOUSLY SEPARATING NITROGEN OXYDE AND SULFUR OXYDE FROM EXHAUST GASES
DE3240317A1 (en) * 1982-10-30 1984-05-03 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen METHOD FOR PRODUCING CALCIUM SULFATE DIHYDRATE IN THE DESULFURATION OF SMOKE GASES
DE3241540A1 (en) * 1982-11-10 1984-05-10 L. & C. Steinmüller GmbH, 5270 Gummersbach METHOD FOR THE CONTINUOUS REMOVAL OF WASHING SUSPENSION WITH INCREASED SOLIDS CONCENTRATION FROM A WASHING TOWER OF A SMOKE GAS DESULPATION SYSTEM WORKING WITH LIME OR LIMESTONE AS AN ABSORPTION AGENT
DE3241539C2 (en) * 1982-11-10 1985-08-01 L. & C. Steinmüller GmbH, 5270 Gummersbach Process to improve the formation of gypsum during wet flue gas desulphurisation with lime washing
DE3245754A1 (en) * 1982-12-10 1984-07-19 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen METHOD FOR PRODUCING CALCIUM SULFATE DIHYDRATE IN THE DESULFURATION OF SMOKE GASES FROM POWER PLANT BOILERS AND THE LIKE
DE3305120A1 (en) * 1983-02-15 1984-08-16 Uhde Gmbh, 4600 Dortmund Process for flue gas purification
DE3419611A1 (en) * 1984-05-25 1985-11-28 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Simultaneous scrubbing of SO2 and NOx from exhaust gases downstream of combustion plants

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DE-Z: Erdöl und Kohle, Bd.38, H.5, Mai 1985, S.201-209 *
DE-Z: Staub-Reinhalt.Luft, 44, 1984, Nr.6, Juni, S.285-291 *

Similar Documents

Publication Publication Date Title
US5186916A (en) Method for purifying flue-gasses
DE2554584B2 (en) Process for regenerating an aqueous solution of an iron chelate complex and a sulfite used for the absorptive removal of nitrogen oxides and sulfur oxides from exhaust gases
DE2559546B2 (en) Process for separating nitrogen oxides or nitrogen oxides and sulfur oxides from exhaust gases
US4222993A (en) Removal of noxious contaminants from gas
DE2304496C3 (en) Process for removing SO2 from exhaust gases
PL169819B1 (en) Method of removing sulfur dioxide and nitrogen oxides from combustion gases
DE2624358B2 (en) METHOD OF WET WASHING OF EXHAUST GASES
DE3601454A1 (en) Process for removing HCl, HF, SO3, SO2 and NOx from combustion exhaust gases by simultaneous wet scrubbing with controlled scrubbing water circulation and specific addition of lime
EP0238811B1 (en) Process for the purification of s02-containing flue gases
DE3310716C2 (en) Process for the absorptive removal of HCL and SO? 2? from flue gas
DE2755252A1 (en) METHOD OF REMOVING SULFUR DIOXIDE FROM EXHAUST GASES TO CREATE PLASTER
WO1986005709A1 (en) Process for the cleansing of fumes
DE3525051C2 (en)
WO1986006981A1 (en) METHOD FOR SIMULTANEOUSLY REMOVING BY WASHING SO2, NOx AND OPTIONALLY OTHER NOXIOUS SUBSTANCES CONTAINED IN FLUE GASES IN HEATING INSTALLATIONS SUPPLIED WITH FOSSILE FUELS
DE3230352A1 (en) Process for purification of flue gas from SO2, HCl, HF and preferably NOx downstream of coal-fired or oil-fired power stations and refuse incineration plants or other fired plants
DE3515707C2 (en)
DE3528971A1 (en) Process for the simultaneous SO2/NOx separation from flue gases with simultaneous recovery of SO2-rich gas
DE3512500A1 (en) Multi-stage HCl, SO2 and NOx scrubbing process for flue gas purification, preferably downstream of fossil-fuel power stations
DE3124671A1 (en) Process and plant for the selective separation of chlorides and fluorides from flue gases or exhaust gases
DE3517483C2 (en)
DE3523354C2 (en)
DE3531203A1 (en) Scrubbing water treatment for the simultaneous removal of SO2 and NOx from gases
DE3518358A1 (en) Multi-stage simultaneous SO2 and NOx gas purification having scrubbing water treatment
DE3641170A1 (en) Simultaneous SO2/NOx wet scrubbing process with scrubbing water treatment for purifying combustion exhaust gases
DE3543843A1 (en) Process for the simultaneous scrubbing of SO2 and NOx from flue gases by the use of additives with low manganese content

Legal Events

Date Code Title Description
AF Is addition to no.

Ref country code: DE

Ref document number: 3525051

Format of ref document f/p: P

OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
AF Is addition to no.

Ref country code: DE

Ref document number: 3525051

Format of ref document f/p: P

8131 Rejection