DE3504157A1 - Additives for the simultaneous scrubbing of SO2 and NOx - Google Patents

Additives for the simultaneous scrubbing of SO2 and NOx

Info

Publication number
DE3504157A1
DE3504157A1 DE19853504157 DE3504157A DE3504157A1 DE 3504157 A1 DE3504157 A1 DE 3504157A1 DE 19853504157 DE19853504157 DE 19853504157 DE 3504157 A DE3504157 A DE 3504157A DE 3504157 A1 DE3504157 A1 DE 3504157A1
Authority
DE
Germany
Prior art keywords
scrubbing
washing
water
washing liquid
added
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
DE19853504157
Other languages
German (de)
Other versions
DE3504157C2 (en
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
Application filed by Individual filed Critical Individual
Priority to DE19853504157 priority Critical patent/DE3504157A1/en
Priority to EP86901375A priority patent/EP0215039A1/en
Priority to JP61501422A priority patent/JPS62501619A/en
Priority to PCT/EP1986/000064 priority patent/WO1986004521A1/en
Publication of DE3504157A1 publication Critical patent/DE3504157A1/en
Application granted granted Critical
Publication of DE3504157C2 publication Critical patent/DE3504157C2/de
Granted 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

Abstract

It is known to scrub out SO2 and NOx from flue gases by using, for the SO2 scrubbing, alkalis and/or limestone or hydrated lime, fine white lime, sodium hydroxide solution, potassium hydroxide solution etc. It is further known to improve the scrubbing capacity of the additives used by adding monobasic and/or polybasic carboxylic acids. In the simultaneous scrubbing of SO2 and NOx, EDTA and/or NTA is used for iron chelate complex formation. In order to create a more stable iron complex compound, according to the invention it is proposed that the scrubbing liquid is prepared with limestone, hydrated lime or alkalis, where, according to the invention, these are prepared from an iron chelate complex, e.g. using EDTA and/or NTA, which - stabilised by calcium formate or sodium formate and containing added sodium dithionite - is used in the scrubbing water, where, according to the invention, to reduce the oxygen absorption of the scrubbing water, a highly water-soluble salt is added, preferably inorganic, for example by enrichment of the calcium choride, obtained from the flue gas and taken up by the scrubbing water via the HCl neutralisation up to the range greater than 5% saturated.

Description

Beschreibung und Erläuterung zur PatentanmeldungDescription and explanation of the patent application

II Zuschlag stoffe für die simultane 502 und ".II aggregates for the simultaneous 502 and ".

Es ist bekannt, SO und NOx auszuwaschen, indem für die S02-Waschung vorzugsweise Alkalien Anwendung finden und/oder Kalkstein bzw. Kalkhydrat, Weißfeinkalk bzw. Natronlauge oder Kalilauge usw..It is known to scrub SO and NOx by for SO2 scrubbing Preferably alkalis are used and / or limestone or hydrated lime, white fine lime or caustic soda or potassium hydroxide, etc.

Weiterhin ist bekannt, daß zur Verbesserung der Waschfähigkeit der eingesetzten Additive ein- und/ oder mehrbasische Carbonsäuren Anwendung finden.It is also known that to improve the washability of the The additives used are mono- and / or polybasic carboxylic acids.

Bei der simultanen Waschung von S02 und NO# benötigt man zur Elsenchelatkomplexherstellung ED2A und/oder NTA, das zweckdienlicherweise erfindungsgemäß mit Kalziumformiat bzw. Natriumformiat versetzt wird, um eine stabilere Eisenkomplexverbindung zu schaffen.For the simultaneous washing of S02 and NO #, one needs to produce elsenic chelate complex ED2A and / or NTA, which expediently according to the invention with calcium formate or Sodium formate added becomes a more stable iron complex compound to accomplish.

Das Rauchgas enthält, je nach Einsatz des fossilen Brennstoffes, einen entsprechenden Sauerstoffgehalt, der in der Regel zwischen 6 % und 10 * liegt.The flue gas contains, depending on the use of fossil fuel, one corresponding oxygen content, which is usually between 6% and 10 *.

Das NO mit diesem Sauerstoffgehalt belastet die erfindungsgemäß eingesetzten Natriumdithionitverbindungen, die erfindungsgemäß zur Einstellung des negativen Redoxpotentials zweckdienlicherweise genutzt werden.The NO with this oxygen content pollutes those used according to the invention Sodium dithionite compounds according to the invention to adjust the negative Redox potential are expediently used.

Es wird daher weiterhin erfindungsgemäß vorgeschlagen, zur Minderung der Sauerstoff aufnahme des Waschwassers ein gut wasserlösliches Salz zuzugeben, vorzugsweise anorganisch, z.B. durch Anreicherung des Kalziumchlorids, aus dem Rauchgas gewonnen und an das Waschwasser über die HC1-Bindung angelagert, um einen Natriumdithionitverbrauch stark zu verringern.It is therefore also proposed according to the invention to reduce add a water-soluble salt to the oxygen uptake of the wash water, preferably inorganic, e.g. by enriching the calcium chloride from the flue gas obtained and attached to the wash water via the HC1 bond to reduce sodium dithionite consumption greatly decrease.

Selbstverständlich ist die Erfindung nicht auf die vorstehend im einzelnen beschriebenen Ausführungs formen beschränkt, sondern es sind zahlreiche Abänderungen möglich, ohne jedoch von dem Grundgedanken abzuweichen, Zuschlagstoffe für das Waschwasser zur simultanen SO2# und N0x- Waschung so anzusetzen, daß die erfindungsgemäße EDTA bzw. NTA Eisenchelatkoinplexbildung mit Kalziumformiat bzw. Natriumformiat gemischt wird, und zur Verhinderung von hoher Sauerstoffaufnahme des Waschwassers, das zu einem erheblichen Natriumdithionitverbrauch führt, das Waschwasser mit wasserlöslichen Salzen angereichert wird, vorzugsweise anorganisch, wobei vorzugsweise bei vorhandenem Kalziumchlorid im Rauchgas dieses Kalziumchlorid so lange über die HC1-Bindung am Waschwasser im Kreislauf gefahren wird bis eine Anreicherung von größer 5 im Waschwasserkreislauf erreicht wird.Of course, the invention is not limited to the above in detail Embodiment described forms limited, but there are numerous changes possible, but without deviating from the basic idea, additives for the washing water for simultaneous SO2 # and NOx washing to be set up in such a way that the EDTA according to the invention or NTA Eisenchelatkoinplexbildung mixed with calcium formate or sodium formate will, and to prevent high oxygen uptake of the wash water that is too leads to a considerable consumption of sodium dithionite, the washing water with water-soluble Salts is enriched, preferably inorganically, preferably when present Calcium chloride in the flue gas this calcium chloride so long on the HC1 bond Wash water is circulated until an accumulation of greater than 5 in the wash water circuit is achieved.

Die Waschflüssigkeit wird mit Hemmstoffen versetzt, die die Löslichkeit des Sauerstoffes in der Waschflüssigkeit herabsetzen.The washing liquid is mixed with inhibitors that reduce the solubility of the oxygen in the washing liquid reduce.

Dieses kann dadurch gemacht werden, daß man den Kalziumchloridwert des Waschwassers heraufsetzt bzw. das Natriumdithionit mit einer Gelpaste ansetzt, so daß es im Wasser stabilisierter gegenüber dem Sauerstoffanteil vorliegt.This can be done by taking the calcium chloride value of the washing water or the sodium dithionite with a gel paste, so that it is more stabilized in the water with respect to the oxygen content.

Patentansprüche: Patent claims:

Claims (1)

Patentansprüche: Anspruch 1 Zuschlagstoffe für die simultane S02- 2und Nöx# Waschung dadurch gekennzeichnet, daß die Waschflüssigkeit mit Kalkstein, Kalkhydrat oder Alkalien angesetzt ist, wobei diese erfindun#sgemäß aus einem Eisenchelatkomplex hergestellt sind, z.B. mit EDTA und/oder NTA, das - mit Kalziumformiat bzw. Natriumformiat stabilisiert und mit Natriumdithionit versetzt - Anwendung im Waschwasser findet, wobei erfindungsgemäß zur Minderung der Sauerstoffaufnahine des Waschwassers ein gut wasserlösliches Salz zugegeben wird, vorzugsweise anorganisch, z.B. durch Anreicherung des Kalziumchlorids, aus dem Rauchgas gewonnen und an das Waschwasser über die HCl-Bindunz angelagert und bis in den Bereich größer 5 % aufgesättigt wird.Claims: Claim 1 additives for the simultaneous S02- 2und Nöx # washing characterized in that the washing liquid with limestone, Hydrated lime or alkalis is added, these according to the invention being composed of an iron chelate complex are made, e.g. with EDTA and / or NTA, the - with calcium formate or sodium formate stabilized and mixed with sodium dithionite - used in washing water, according to the invention, to reduce the oxygen uptake of the wash water readily water-soluble salt is added, preferably inorganically, e.g. by enrichment of calcium chloride, obtained from the flue gas and transferred to the washing water via the HCl bond deposited and saturated up to the area greater than 5%. Anspruch 2 Waschflüssigkeit zur Waschung von S02 und NOx nach Anspruch 1 dadurch gekennzeichnet, daß die Waschflüssigkeit mit einem Stoff versetzt wird, der die Löslichkeit des Sauerstoffes in der Waschflüssigkeit herabsetzt - z.B. Kalziumchloridgehalt größer 5 %.Claim 2 washing liquid for washing SO2 and NOx according to claim 1 characterized in that the washing liquid is mixed with a substance, which reduces the solubility of the oxygen in the washing liquid - e.g. calcium chloride content greater than 5%. AnsDruch 3 Waschflüssigkeit zur Waschung von 502 und NQx nach Anspruch 1 - 2 dadurch gekennzeichnet, daß das zugegebene Natriumdithionit in einem Gelzustand zugegeben wird, der einen möglichst geringen Kontakt mit Luftsauerstoff in der Waschflüssigkeit zuläßt, und somit die angesetzte Dithionitlösung nicht durch Sauerstoff zerstört wird.AnsDruch 3 washing liquid for washing 502 and NQx according to claim 1-2, characterized in that the added sodium dithionite is in a gel state is added, the lowest possible contact with atmospheric oxygen in the washing liquid allows, and thus the set dithionite solution is not destroyed by oxygen will.
DE19853504157 1985-02-07 1985-02-07 Additives for the simultaneous scrubbing of SO2 and NOx Granted DE3504157A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19853504157 DE3504157A1 (en) 1985-02-07 1985-02-07 Additives for the simultaneous scrubbing of SO2 and NOx
EP86901375A EP0215039A1 (en) 1985-02-07 1986-02-06 Process for purifying combustion gases
JP61501422A JPS62501619A (en) 1985-02-07 1986-02-06 Exhaust gas purification law
PCT/EP1986/000064 WO1986004521A1 (en) 1985-02-07 1986-02-06 Process for purifying combustion gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853504157 DE3504157A1 (en) 1985-02-07 1985-02-07 Additives for the simultaneous scrubbing of SO2 and NOx

Publications (2)

Publication Number Publication Date
DE3504157A1 true DE3504157A1 (en) 1986-08-07
DE3504157C2 DE3504157C2 (en) 1989-08-03

Family

ID=6261908

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853504157 Granted DE3504157A1 (en) 1985-02-07 1985-02-07 Additives for the simultaneous scrubbing of SO2 and NOx

Country Status (2)

Country Link
JP (1) JPS62501619A (en)
DE (1) DE3504157A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2234232A (en) * 1989-07-19 1991-01-30 Hitachi Shipbuilding Eng Co Desulphurizing flue gas with calcium salts
US5200160A (en) * 1991-08-29 1993-04-06 Dravo Lime Company Process for removing sulfur dioxide and nitrogen oxides from flue gases
US7405069B2 (en) 2002-04-08 2008-07-29 Akzo Nobel N.V. Method for removing a nitrogen oxide from a gas

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2853718B1 (en) * 2013-09-27 2020-06-24 Ansaldo Energia IP UK Limited Method of exhaust gas treatment for a gas turbine system and exhaust gas treatment assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2353528A1 (en) * 1972-10-25 1974-05-16 Hitachi Ltd Treating waste gases to remove nitrogen- and sulphur oxides - without the formation of nitric acid derivs
DE2416660A1 (en) * 1973-04-09 1974-10-24 Mitsui Petrochemical Ind PROCEDURE FOR THE REMOVAL OF NITROGEN OXYDE FROM A GAS
DE2451274A1 (en) * 1973-10-31 1975-05-15 Kureha Chemical Ind Co Ltd PROCESS FOR THE REMOVAL OF NITROGEN OXIDES FROM GASES CONTAINING NITROGEN
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2353528A1 (en) * 1972-10-25 1974-05-16 Hitachi Ltd Treating waste gases to remove nitrogen- and sulphur oxides - without the formation of nitric acid derivs
DE2416660A1 (en) * 1973-04-09 1974-10-24 Mitsui Petrochemical Ind PROCEDURE FOR THE REMOVAL OF NITROGEN OXYDE FROM A GAS
DE2451274A1 (en) * 1973-10-31 1975-05-15 Kureha Chemical Ind Co Ltd PROCESS FOR THE REMOVAL OF NITROGEN OXIDES FROM GASES CONTAINING NITROGEN
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Energie 35, S.18-22, 1983 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2234232A (en) * 1989-07-19 1991-01-30 Hitachi Shipbuilding Eng Co Desulphurizing flue gas with calcium salts
GB2234232B (en) * 1989-07-19 1993-12-01 Hitachi Shipbuilding Eng Co Dry processes for treating combustion exhaust gas
US5200160A (en) * 1991-08-29 1993-04-06 Dravo Lime Company Process for removing sulfur dioxide and nitrogen oxides from flue gases
US7405069B2 (en) 2002-04-08 2008-07-29 Akzo Nobel N.V. Method for removing a nitrogen oxide from a gas

Also Published As

Publication number Publication date
DE3504157C2 (en) 1989-08-03
JPS62501619A (en) 1987-07-02

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Legal Events

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8339 Ceased/non-payment of the annual fee