DE3505026A1 - Process and apparatus for preventing the influence of atmospheric oxygen on the scrubbing liquid for simultaneous scrubbing of NOx and residual traces of SO2 in flue gas scrubbing downstream of combustion plants - Google Patents
Process and apparatus for preventing the influence of atmospheric oxygen on the scrubbing liquid for simultaneous scrubbing of NOx and residual traces of SO2 in flue gas scrubbing downstream of combustion plantsInfo
- Publication number
- DE3505026A1 DE3505026A1 DE19853505026 DE3505026A DE3505026A1 DE 3505026 A1 DE3505026 A1 DE 3505026A1 DE 19853505026 DE19853505026 DE 19853505026 DE 3505026 A DE3505026 A DE 3505026A DE 3505026 A1 DE3505026 A1 DE 3505026A1
- Authority
- DE
- Germany
- Prior art keywords
- scrubbing
- liquid
- scrubbing liquid
- gas
- washing
- 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.)
- Withdrawn
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)
- Gas Separation By Absorption (AREA)
Abstract
Description
Beschreibung und Erläuterung zur PatentanmeldungDescription and explanation of the patent application
"Verfahren und Vorrichtung zur Verhinderung der Beeinflussung der Waschflüssigkeit zur simultanen NOx und Restspuren-S02-Waschung durch Luftsauerstoff bei der Rauchgaswaschung hinter Verbrennungsanlagen"."Method and device for preventing the influence of the Scrubbing liquid for simultaneous NOx and residual trace S02 scrubbing using atmospheric oxygen in the case of flue gas scrubbing behind incineration plants ".
Zur Waschung von S02 und NO.x wird in neuerer Zeit nach den Patentanmeldungen Hölter eine zweistufige S02- und N0x-Waschung angewandt.For the washing of SO2 and NO.x is more recently according to the patent applications He used a two-stage S02 and N0x wash.
Die Waschflüssigkeitskreisläufe, die bevorzugt zur $02-Waschung angesetzt sind, benötigen eine oxidative Beeinflussung, um CaSO4 herzustellen beim Kalkverfahren.The washing fluid circuits, which are preferably set up for washing require an oxidative influence in order to produce CaSO4 in the lime process.
Die Waschflüssigkeit, die vorwiegend zur NO##Abscheidung dient, muß eine reduzierende Eigenschaft aufweisen, vorzugsweise ein negatives Redox-Potential von, je nach i'rO# und 502 Belastung und gewünschtem sowie erforderlichem Auswaschgrad von NO minus 50 bis minus 300 mV (gemessen gegen Kalomelelektrode).The washing liquid, which is mainly used for NO ## separation, must have a reducing property, preferably a negative redox potential from, depending on i'rO # and 502 load and desired and required Degree of leaching from NO minus 50 to minus 300 mV (measured against a calomel electrode).
Zur Aufrechterhaltung des negativen Redox-Potentials werden chemische Stoffe und/oder elektrolytische Einflüsse wirksam gemacht.To maintain the negative redox potential, chemical Substances and / or electrolytic influences made effective.
Es wurde gefunden, daß der Verbrauch an chemischen Zuschlagstoffen, wie Natriumdithionit und/oder zusätzlich elektrischer Energie für die Elektrolyse zur Einstellung des negativen Redox-Potentials nicht der Stickoxidbelastungswert im Rohgas darstellt, sondern der Luftsauerstoffüberschuß im Rohgas den Bedarf von chemischen Zuschlagstoffen und/oder elektrolytischer Energie sehr stark negativ wirtschaftlich beeinflußt.It has been found that the consumption of chemical additives, such as sodium dithionite and / or additional electrical energy for electrolysis to set the negative redox potential, not the nitrogen oxide exposure value represents in the raw gas, but the excess oxygen in the raw gas the demand of chemical additives and / or electrolytic energy very negative economically influenced.
Es wird daher erfindungsgemäß vorgeschlagen, den Luftsauerstoff so kurzzeitig wie möglich mit der Waschflüssigkeit zur NO -Auswaschun in Kontakt zu bringen.It is therefore proposed according to the invention, the atmospheric oxygen so briefly as possible with the Washing liquid for NO washing out to bring in contact.
Bisher wurden Wäschersysteme angewandt, die in einfachster Art und Weise mit einer sehr hohen Waschwassermenge aus einem relativ großen Vorratsbehälter das Gas in Kontakt brachten, und die Waschflüssigkeit ohne besondere Aufmerksamkeit gegenüber Luftsauerstoffüberschuß im Wäschersystem integriert wird.So far, scrubber systems have been used in the simplest manner and Way with a very large amount of washing water from a relatively large storage tank brought the gas into contact, and the scrubbing liquid without special attention against excess air oxygen is integrated in the scrubber system.
Brfindungsgemäß wird daher vorgeschlagen, die Waschflüssigkeit zur NO##Auswaschung so kurzzeitig wie möglich mit geringstem rengenwert von Waschflüssigkeitsmenge zur Rauchgasmenge mit dem Gas in Verbindung zu bringen, um den erforderlichen Auswaschgrad zu garantieren, wobei die Waschflüssigkeitsmenge so gering wie möglich bevorratet wird, daß immer nur die momentan notwendige Waschflüssigkeitsmenge fast kongruent zur Beaufschlagung mit dem Rohgas zur NO -Waschung mit negativem Redox-Potential versehen wird und die abfließende Waschflüssigkeitsmenge aus dem Hauptwäscher zur NO -Waschuna und/oder Vorwäscher bzw.According to the invention, it is therefore proposed to use the washing liquid NO ## Wash out as briefly as possible with the lowest possible amount of washing liquid to bring the amount of flue gas into contact with the gas in order to achieve the required degree of scrubbing to guarantee, with the amount of washing liquid stored as low as possible becomes that only the amount of washing liquid required at the moment is almost congruent for loading with the raw gas for NO scrubbing with negative Redox potential is provided and the amount of washing liquid flowing off from the Main washer for NO washing and / or pre-washer or
weiteren Waschstufen.in einen kleinen Waschvorratsmengenbehälter, vorzugsweise abtauchend in die Flüssigkeit eingeführt wird, und die Flüssigkeit selber gegen den Roh- und/oder bereits gewaschenen Reingasstrom abgedichtet zur Redox-Potential-Ein-Stellung durch chemische Zuschlagstoffe und/oder Elektrolyse im System integriert ist.further washing stages. in a small washing reservoir, is introduced into the liquid, preferably submerged, and the liquid itself sealed against the raw and / or already washed clean gas flow Redox potential on setting through chemical additives and / or electrolysis is integrated in the system.
Eine Vorrichtung zur Durchführung dieser erfindungsgemäßen Idee ist in der beiliegenden Zeichnung dargestellt: mit (1) das Rohgas; mit (2) das Reingas; mit (3) die Umlaufpumpe für die Waschflüssigkeit mit negativem Redox-Potential; mit (4) der erfindungsgemäß gegenüber dem Roh- und/ oder Reingasstrom abgedeckte Waschflüssigkeitsbehälter.mit abgetauchten Zuflußrohren aus den verschiedenen NO##Waschstufen (10); mit (5) ein Waschflüssigkeitsrohr aus Parallelwäschern; mit (6) der Wäscher; mit (7) die Düsen; mit (8) der Tropfenfänger im Reingassystem; mit (9) die Abdeckung der Waschflüssigkeit; mit (10) die abgetauchten Zuflußrohre aus den verschiedenen NO##Waschstufen.A device for implementing this inventive idea is shown in the accompanying drawing: with (1) the raw gas; with (2) the clean gas; with (3) the circulation pump for the washing liquid with negative redox potential; with (4) the one covered according to the invention with respect to the raw and / or clean gas stream Washing liquid container with submerged supply pipes from the various NO ## washing stages (10); with (5) a washing liquid pipe made up of parallel washers; with (6) the washer; with (7) the nozzles; with (8) the drip catcher in the clean gas system; with (9) the cover of the washing liquid; with (10) the submerged inflow pipes from the various NO ## washing stages.
Durch diese erfindungsgemäße Vorrichtung wird der erfindungsgemäße Gedanke erzielt, das Roh- und/oder Reingas, das zur NO -Waschung mit einer Waschflüssigkeit, die negatives Redox-Potential c?Ufweist und reduzierende Eigenschaften besitzt, so kurz wie möglich mit dem Gasstrom / Rohgasstrom in Verbindung zu bringen und die Waschflüssigkeitsbevorratung gegenüber dem Gasstrom abgedeckt zu nutzen.This inventive device is the inventive Thought achieved, the raw and / or clean gas that is used for NO scrubbing with a scrubbing liquid, has negative redox potential and has reducing properties, as briefly as possible with the gas flow / raw gas flow and to use the scrubbing liquid storage covered with respect to the gas flow.
Die Bevorratung der Waschflüssigkeit soll so klein bemessen sein, daß nach Herstellung des reduzierenden Redox-Fotentials die Waschflüssigkeit so schnell wie möglich mit dem Gasstrom in Kontakt gebracht wird, und diese Bevorratung nur wenige Minuten beträgt, um den Luftsauerstoff, der evtl. durch die Abtauchrohre in den Behälter gelangt, so gering wie möglich wirksam werden zu lassen.The storage of the washing liquid should be so small that that after making the reducing Redox Photentials the washing liquid is brought into contact with the gas flow as quickly as possible, and this storage only a few minutes to remove the oxygen from the air, which may have passed through the immersion tubes gets into the container to be effective as little as possible.
Die Abdeckung der Waschflüssigkeit wird vorzugsweise durch eine schwimmende wasser- und luftundurchlässige Schicht durchgeführt, die in der zugeschnittenen t'orm die Flbssigkeitsoberfläche schwimmend abdeckt, und nur die Öffnungen für die Waschflüssigkeitsrohre offen sind.The cover of the washing liquid is preferably by a floating water- and air-impermeable layer carried out in the tailored t'orm the liquid surface floating, and only the openings for the Washer fluid pipes are open.
Patentansprüche: - Leerseite -Patent claims: - blank page -
Claims (1)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853505026 DE3505026A1 (en) | 1985-02-14 | 1985-02-14 | Process and apparatus for preventing the influence of atmospheric oxygen on the scrubbing liquid for simultaneous scrubbing of NOx and residual traces of SO2 in flue gas scrubbing downstream of combustion plants |
PCT/EP1986/000064 WO1986004521A1 (en) | 1985-02-07 | 1986-02-06 | Process for purifying combustion gases |
EP86901375A EP0215039A1 (en) | 1985-02-07 | 1986-02-06 | Process for purifying combustion gases |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853505026 DE3505026A1 (en) | 1985-02-14 | 1985-02-14 | Process and apparatus for preventing the influence of atmospheric oxygen on the scrubbing liquid for simultaneous scrubbing of NOx and residual traces of SO2 in flue gas scrubbing downstream of combustion plants |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3505026A1 true DE3505026A1 (en) | 1986-08-14 |
Family
ID=6262483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19853505026 Withdrawn DE3505026A1 (en) | 1985-02-07 | 1985-02-14 | Process and apparatus for preventing the influence of atmospheric oxygen on the scrubbing liquid for simultaneous scrubbing of NOx and residual traces of SO2 in flue gas scrubbing downstream of combustion plants |
Country Status (1)
Country | Link |
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DE (1) | DE3505026A1 (en) |
Citations (3)
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 |
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 |
-
1985
- 1985-02-14 DE DE19853505026 patent/DE3505026A1/en not_active Withdrawn
Patent Citations (3)
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 |
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 |
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Legal Events
Date | Code | Title | Description |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
OP8 | Request for examination as to paragraph 44 patent law | ||
8139 | Disposal/non-payment of the annual fee |