DE2657970A1 - Sulphur dioxide removal from gases - by absorbing in soln. contg. a metal halide and hydroxide - Google Patents
Sulphur dioxide removal from gases - by absorbing in soln. contg. a metal halide and hydroxideInfo
- Publication number
- DE2657970A1 DE2657970A1 DE19762657970 DE2657970A DE2657970A1 DE 2657970 A1 DE2657970 A1 DE 2657970A1 DE 19762657970 DE19762657970 DE 19762657970 DE 2657970 A DE2657970 A DE 2657970A DE 2657970 A1 DE2657970 A1 DE 2657970A1
- Authority
- DE
- Germany
- Prior art keywords
- hydroxide
- soln
- metal
- alkaline earth
- halide
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 title claims abstract description 9
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims description 21
- 229910001507 metal halide Inorganic materials 0.000 title claims description 4
- 150000005309 metal halides Chemical class 0.000 title claims description 4
- 229910000000 metal hydroxide Inorganic materials 0.000 title claims description 4
- 239000007789 gas Substances 0.000 title description 9
- 235000010269 sulphur dioxide Nutrition 0.000 title 1
- 239000004291 sulphur dioxide Substances 0.000 title 1
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 7
- 239000001110 calcium chloride Substances 0.000 claims abstract description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 150000004820 halides Chemical class 0.000 claims abstract description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000920 calcium hydroxide Substances 0.000 claims description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 4
- 150000004692 metal hydroxides Chemical class 0.000 claims description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 229910001615 alkaline earth metal halide Inorganic materials 0.000 claims 2
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 claims 1
- 235000011148 calcium chloride Nutrition 0.000 abstract description 6
- 229910052602 gypsum Inorganic materials 0.000 abstract description 3
- 239000010440 gypsum Substances 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- 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)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Geology (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)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
Verfahren zum Entfernen von Schwefeldioxid aus einem GasProcess for removing sulfur dioxide from a gas
Das Hauptpatent betrifft ein Verfahren zum Entfernen von Schwefeldioxid aus einem Gas, bei dem man das Schwefeldioxid enthaltende Gas mit einer Absorptionslösung in Berührung bringt, die ein Halogenid eines Metalls einer der Gruppen II, III und VIII des Periodischen Systems der Elemente sowie ein Hydroxid eines solchen Metalls enthält, und ist dadurch gekennzeichnet, daß man eine Absorptionslösung verwendet, die 25 bis 33 Gew.-% des Metallhalogenids und 0,3 bis 0,8 Gew.-% des Metallhydroxids enthält.The main patent relates to a method for removing sulfur dioxide from a gas in which the gas containing sulfur dioxide is mixed with an absorption solution brings into contact, which is a halide of a metal one of groups II, III and VIII of the Periodic Table of the Elements, as well as a hydroxide of such a metal contains, and is characterized in that an absorption solution is used, the 25 to 33% by weight of the metal halide and 0.3 to 0.8% by weight of the metal hydroxide contains.
Gemäß bevorzugter Ausführungsformen verwendet man als Metallhalogenid Calciumchlorid und als Metallhydroxid Calciumhydro xid.According to preferred embodiments, the metal halide used is Calcium chloride and, as metal hydroxide, calcium hydroxide.
Die vorliegende Erfindung betrifft eine Weiterbildung des Verfahrens des Hauptpatentes, die darin besteht, daß man eine Absorptionslösung verwendet, die 7,5 bis 36 Gew.-% eines Erdalkalihalogenids und 0,03 bis 0,15 Gew.-% des Hydroxids dieses Erdalkalimetalls enthält.The present invention relates to a further development of the method of the main patent, which consists in using an absorption solution, the 7.5 to 36% by weight of an alkaline earth halide and 0.03 to 0.15% by weight of the hydroxide contains this alkaline earth metal.
Besonders bevorzugt ist hier wiederum die Verwendung von Calciumchlorid und Calciumhydroxid. The use of calcium chloride is again particularly preferred here and calcium hydroxide.
Auch diese Absorptionslösung kann man, wie im Hauptpatent beschrieben, mit Sauerstoff vorbehandeln, bevor man sie mit dem Schwefeldioxid enthaltenden Gas in Beruhrung bringt, oder das Schwefeldioxid enthaltende Gas kann vorher mit Sauerstoff gemischt werden. Auch sonst gelten hier alle übrigen im Hauptpatent angegebenen Verfahrensbedingungen. This absorption solution can also be used, as described in the main patent, pretreat them with oxygen before treating them with the gas containing sulfur dioxide brings into contact, or the gas containing sulfur dioxide can beforehand with oxygen be mixed. All of the others stated in the main patent also apply here Procedural conditions.
Die Weiterbildung gemäß vorliegender Erfindung bietet folgende Vorteile: 1. Die Zugabe des Erdalkalichlorids, insbesondere von Calciumchlorid, im obigen Bereich hat den Vorteil, daß das entsprechende Erdalkalisulfat, insbesondere Calciumsulfat, das im Wäscher gebildet wird, unmittelbar in der Flüssigkeit auskristallisiert und nicht auf der Oberfläche des Wäschers. The development according to the present invention offers the following advantages: 1. The addition of the alkaline earth chloride, especially calcium chloride, in the above Area has the advantage that the corresponding alkaline earth sulfate, especially calcium sulfate, that is formed in the scrubber, crystallizes out immediately in the liquid and not on the surface of the washer.
2. Der Ubersättigungsgrad an Erdalkalisulfat, insbesondere Gips in der Erdalkalichloridlösung, insbesondere CaCl2-Lösung, wird vermindert wegen der geringen Löslichkeit des Sulfates, so daß die Bildung von harten Abscheidungen vermieden werden kann. 2. The degree of supersaturation of alkaline earth sulfate, especially gypsum in the alkaline earth chloride solution, especially CaCl2 solution, is reduced because of the low solubility of the sulfate, so that the formation of hard deposits is avoided can be.
3. Die Erdalkalichloridlösung, auch hier insbesondere CaGl2-liösung, bewirkt kein Verstopfen, da die Absetzgeschwindigkeit des Sulfates, insbesondere von Gipsteilchen in der Erdalkalichloridlösung, insbesondere CaCl2-Lösung, geringer ist als in Wasser. 3. The alkaline earth chloride solution, also here in particular CaGl2 solution, does not cause clogging, since the settling rate of the sulfate, in particular of gypsum particles in the alkaline earth chloride solution, especially CaCl2 solution, is lower is than in water.
Selbstverständlich werden auch sonstige saure Bestandteile des Gases entfernt, da sie ja vom vorhandenen Hydroxid gebunden werden. Es ist dann lediglich wesentlich, die Xonzentrationen der Absorptionslösung im eingangs genannten Bereich zu halten.Of course, other acidic components of the gas are also used removed because they are bound by the hydroxide present. It is then only essential, the X concentrations of the absorption solution in the range mentioned above to keep.
Selbstverständlich wird der Gehalt an Erdalkalihydroxid, und auch dies gilt wieder insbesondere für das besonders bevorzugte Calciumhydroxid, durch Faktoren wie das L/G-Verhältnis, die Konzentration an SO2 im Rauchgas und dergleichen beeinflußt.Of course, the alkaline earth hydroxide content, and also this again applies in particular to the particularly preferred calcium hydroxide Factors such as the L / G ratio, the concentration of SO2 in the flue gas and the like influenced.
Das L/G-Verhältnis ist das bekannte Liquid/Gas-Verhältnis (Flüssigkeits/Gas-Verhältnis) und wird gewöhnlich in Liter pro Normalkubikmeter gemessen. Selbstverständlich fällt die Wirksamkeit beim gleichen L/G-Verhältnis mit zunehmendem Gehalt an SO, im Rauchgas ab, jedoch wird überraschenderweise ab einem L/G-Verhältnis von etwa 5 l/Nm3 die Wirksamkeit praktisch unabhängig vom Gehalt von S02 im Rauchgas und erreicht praktisch 100 %.The L / G ratio is the known liquid / gas ratio (liquid / gas ratio) and is usually measured in liters per standard cubic meter. Of course it falls the effectiveness at the same L / G ratio with increasing SO2 content in the flue gas from, but surprisingly from an L / G ratio of about 5 l / Nm3, the Effectiveness practically independent of the content of S02 in the flue gas and practically achieved 100%.
Claims (2)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762657970 DE2657970A1 (en) | 1976-12-21 | 1976-12-21 | Sulphur dioxide removal from gases - by absorbing in soln. contg. a metal halide and hydroxide |
| JP9666477A JPS5377889A (en) | 1976-12-21 | 1977-08-11 | Preventing method for formation of gypsum scale in flue gas desulfurizationtreatment |
| FR7738708A FR2374942A1 (en) | 1976-12-21 | 1977-12-21 | Sulphur dioxide removal from gases - by absorbing in soln. contg. a metal halide and hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762657970 DE2657970A1 (en) | 1976-12-21 | 1976-12-21 | Sulphur dioxide removal from gases - by absorbing in soln. contg. a metal halide and hydroxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2657970A1 true DE2657970A1 (en) | 1978-06-29 |
| DE2657970C2 DE2657970C2 (en) | 1987-09-24 |
Family
ID=5996143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762657970 Granted DE2657970A1 (en) | 1976-12-21 | 1976-12-21 | Sulphur dioxide removal from gases - by absorbing in soln. contg. a metal halide and hydroxide |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5377889A (en) |
| DE (1) | DE2657970A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55165129A (en) * | 1979-06-08 | 1980-12-23 | Kobe Steel Ltd | Desulfurizing method for exhaust gas by wet type lime-gypsum process |
| JPS5950371B2 (en) * | 1979-06-12 | 1984-12-07 | 株式会社神戸製鋼所 | Flue gas desulfurization method using wet lime plaster method |
| JPS5637028A (en) * | 1979-08-30 | 1981-04-10 | Kobe Steel Ltd | Desulfurizing method of exhaust gas |
| JPS5745326A (en) * | 1980-09-01 | 1982-03-15 | Kobe Steel Ltd | Waste gas desulfurization method by lime gypsum method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5124465B2 (en) * | 1972-05-04 | 1976-07-24 | ||
| DE2323508A1 (en) * | 1973-05-10 | 1974-11-28 | Heinz Hoelter | PROCESS FOR SCRUBBISHING SO2, HC1, FLUORINE, DUST AND SIMILAR SMOKE GAS COMPANIES |
-
1976
- 1976-12-21 DE DE19762657970 patent/DE2657970A1/en active Granted
-
1977
- 1977-08-11 JP JP9666477A patent/JPS5377889A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| NICHTS-ERMITTELT * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2657970C2 (en) | 1987-09-24 |
| JPS5377889A (en) | 1978-07-10 |
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