DE3524047A1 - Scrubbing liquid and process for separating SO2 and NOx from flue gases of fossil power stations with simultaneous N2O separation - Google Patents
Scrubbing liquid and process for separating SO2 and NOx from flue gases of fossil power stations with simultaneous N2O separationInfo
- Publication number
- DE3524047A1 DE3524047A1 DE19853524047 DE3524047A DE3524047A1 DE 3524047 A1 DE3524047 A1 DE 3524047A1 DE 19853524047 DE19853524047 DE 19853524047 DE 3524047 A DE3524047 A DE 3524047A DE 3524047 A1 DE3524047 A1 DE 3524047A1
- Authority
- DE
- Germany
- Prior art keywords
- nox
- scrubbing liquid
- flue gases
- ppm
- separation
- 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
Links
- 239000003546 flue gas Substances 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims abstract description 5
- 238000000926 separation method Methods 0.000 title claims description 5
- 238000005201 scrubbing Methods 0.000 title abstract 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract 3
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims abstract 2
- 230000002378 acidificating effect Effects 0.000 claims abstract 2
- 239000013522 chelant Substances 0.000 claims abstract 2
- 239000003795 chemical substances by application Substances 0.000 claims abstract 2
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 claims abstract 2
- 239000003344 environmental pollutant Substances 0.000 claims abstract 2
- 229910052742 iron Inorganic materials 0.000 claims abstract 2
- 230000000873 masking effect Effects 0.000 claims abstract 2
- 231100000719 pollutant Toxicity 0.000 claims abstract 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract 2
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract 2
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract 2
- 239000000243 solution Substances 0.000 claims abstract 2
- 235000002906 tartaric acid Nutrition 0.000 claims abstract 2
- 239000011975 tartaric acid Substances 0.000 claims abstract 2
- 238000005406 washing Methods 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 2
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 239000005437 stratosphere Substances 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
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
- B01D53/68—Halogens or halogen compounds
-
- 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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/464—Sulfates of Ca from gases containing sulfur oxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/48—Sulfites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
It is known that in the combustion of fossil energy sources, in addition to NO2 and NO, N2O is also formed. This N2O is undesirable in principle since it leads to an enrichment in the stratosphere and the ozone layer is affected. The know processes for decreasing the NOx in the flue gas are primarily orientated to separating out NO, since this NO constitutes over 90% of the NOx. It is also known that, for example, in the selective catalytic reduction of NO using NH3, not only N2 and H2O but also N2O is formed, as a result of which the N2O base content in flue gases is increased. It has now been found that the N2O concentrations of 10-50 ppm in the flue gas, independently of the concentration, can be reduced according to the invention to below 2 ppm by using a scrubbing liquid which contains iron chelate, sodium hydroxide solution, sodium sulphite and sodium sulphate and by addition of reducing agents and/or masking agents, for example preferably dithionite and/or tartaric acid, for maintaining ironII or for reducing ironIII to ironII selectively and/or simultaneously separates out SO2, NOx, NO2, HCl, HF and other, preferably acidic pollutants. The pH of the scrubbing liquid is adjusted to below pH 8, preferably - depending on the necessary efficiency - between 6 and 7.5.
Description
In der Hauptanmeldung P 35 18 974.6 wird eine Waschlösung zur simultanen Waschung von SO2 und NOx in Rauchgasen hinter Kraftwerken und anderen fossilen Verbrennungsanlagen beschrieben.The main application P 35 18 974.6 describes a washing solution for the simultaneous washing of SO 2 and NO x in flue gases behind power plants and other fossil combustion plants.
Es ist bekannt, daß bei der Verbrennung von fossilen Energieträgern neben NO2 und NO auch N2O entsteht. Dieses N2O ist grundsätzlich unerwünscht, da es zu einer Anreicherung in der Stratosphäre kommt, und der Ozongürtel beeinflußt wird.It is known that when fossil fuels are burned, N 2 O is formed in addition to NO 2 and NO. This N 2 O is fundamentally undesirable because it accumulates in the stratosphere and affects the ozone belt.
Die N2O-Konzentrationen in unbehandelten Rauchgasen betragen je nach Feuerungsart zwischen 10 und 50 ppm.The N 2 O concentrations in untreated flue gases are between 10 and 50 ppm depending on the type of furnace.
Verfahren zur Minderung des NOx im Rauchgas orientieren vorrangig auf die Abscheidung von NO, da dieses NO mit über 90% am NOx beteiligt ist.Processes for the reduction of NO x in flue gas primarily focus on the separation of NO, since this NO is involved in the NO x with over 90%.
Es ist auch bekannt, daß z. B. bei der selektiven katalytischen Reduktion des NO mit NH3 nicht nur N2 und H2O, sondern auch N2O entsteht, wodurch der N2O-Grundgehalt in Rauchgasen erhöht wird.It is also known that e.g. B. not only N 2 and H 2 O, but also N 2 O is formed in the selective catalytic reduction of NO with NH 3 , whereby the basic N 2 O content in flue gases is increased.
Dagegen wurde gefunden, daß bei Anwendung einer Waschflüssigkeit gemäß Patentanmeldung P 35 18 974.6 die N2O-Konzentration des Rauchgases abgesenkt wird infolge der gleichzeitigen chemisch-physikalischen Bindung des N2O neben NO in der Waschflüssigkeit.In contrast, it was found that when using a washing liquid according to patent application P 35 18 974.6, the N 2 O concentration of the flue gas is reduced as a result of the simultaneous chemical-physical binding of the N 2 O in addition to NO in the washing liquid.
Durch Verwendung der erfindungsgemäßen Waschflüssigkeit werden die N2O-Konzentrationen von 10-50 ppm im Rauchgas unabhängig von der Konzentration bis auf kleiner 2 ppm abgesenkt, ohne daß die erfindungsgemäße Abscheidung von SO2, NO und NO2 beeinträchtigt wird.By using the washing liquid according to the invention, the N 2 O concentrations of 10-50 ppm in the flue gas are reduced to less than 2 ppm regardless of the concentration, without the SO 2 , NO and NO 2 separation being impaired.
Claims (2)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853524047 DE3524047A1 (en) | 1985-05-25 | 1985-07-05 | Scrubbing liquid and process for separating SO2 and NOx from flue gases of fossil power stations with simultaneous N2O separation |
| PCT/EP1986/000317 WO1986006981A1 (en) | 1985-05-25 | 1986-05-24 | METHOD FOR SIMULTANEOUSLY REMOVING BY WASHING SO2, NOx AND OPTIONALLY OTHER NOXIOUS SUBSTANCES CONTAINED IN FLUE GASES IN HEATING INSTALLATIONS SUPPLIED WITH FOSSILE FUELS |
| EP86903350A EP0223803A1 (en) | 1985-05-25 | 1986-05-24 | METHOD FOR SIMULTANEOUSLY REMOVING BY WASHING SO 2?, NO x? AND OPTIONALLY OTHER NOXIOUS SUBSTANCES CONTAINED IN FLUE GASES IN HEATING INSTALLATIONS SUPPLIED WITH FOSSILE FUELS |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853518974 DE3518974A1 (en) | 1985-05-25 | 1985-05-25 | Scrubbing solution for simultaneous scrubbing of SO2 and NOx in flue gases downstream of power stations and other fossil combustion plants |
| DE19853524047 DE3524047A1 (en) | 1985-05-25 | 1985-07-05 | Scrubbing liquid and process for separating SO2 and NOx from flue gases of fossil power stations with simultaneous N2O separation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3524047A1 true DE3524047A1 (en) | 1987-01-15 |
Family
ID=25832591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19853524047 Ceased DE3524047A1 (en) | 1985-05-25 | 1985-07-05 | Scrubbing liquid and process for separating SO2 and NOx from flue gases of fossil power stations with simultaneous N2O separation |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3524047A1 (en) |
Citations (2)
| 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 |
| DE3518974A1 (en) * | 1985-05-25 | 1986-11-27 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | Scrubbing solution for simultaneous scrubbing of SO2 and NOx in flue gases downstream of power stations and other fossil combustion plants |
-
1985
- 1985-07-05 DE DE19853524047 patent/DE3524047A1/en not_active Ceased
Patent Citations (2)
| 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 |
| DE3518974A1 (en) * | 1985-05-25 | 1986-11-27 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | Scrubbing solution for simultaneous scrubbing of SO2 and NOx in flue gases downstream of power stations and other fossil combustion plants |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AF | Is addition to no. |
Ref country code: DE Ref document number: 3518974 Format of ref document f/p: P |
|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| OP8 | Request for examination as to paragraph 44 patent law | ||
| AF | Is addition to no. |
Ref country code: DE Ref document number: 3518974 Format of ref document f/p: P |
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| 8178 | Suspension cancelled | ||
| 8131 | Rejection |