GB1424941A - Method of removing oxides of sulphur from waste gas - Google Patents
Method of removing oxides of sulphur from waste gasInfo
- Publication number
- GB1424941A GB1424941A GB34374A GB34374A GB1424941A GB 1424941 A GB1424941 A GB 1424941A GB 34374 A GB34374 A GB 34374A GB 34374 A GB34374 A GB 34374A GB 1424941 A GB1424941 A GB 1424941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aqueous medium
- waste gas
- sulphur
- contacting zone
- per cent
- 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.)
- Expired
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
- B01D53/48—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
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
1424941 Removal of sulphur oxides PULLMAN Inc 4 Jan 1974 00343/74 Heading C1A A process for removing oxides of sulphur from industrial waste gas comprises: scrubbing said waste gas in a contacting zone with an aqueous medium having a pH below 7À1 containing calcium carbonate, carbon dioxide and at least 3 wt. per cent of one of sodium, lithium, potassium, magnesium and ammonium sulphates; precipitating solids comprising calcium sulphate and/or calcium sulphite from the aqueous medium; removing a portion of said solids; and introducing a further portion of said solids with said aqueous medium to the contacting zone. Preferably the concentration of soluble sulphate in the aqueous medium is in the range 5 to 27 wt. per cent; the waste gas and the aqueous medium are contacted in a Venturi scrubber for less than 3 seconds; and the temperature of the contacting zone lies between 100‹ and 180‹ F., the pressure therein being 12 to 18 p.s.i.a. In an improved embodiment of the process, at least part of the aqueous medium is recovered as an aqueous supernatant liquor containing at least 3 wt. per cent of one of the above-mentioned soluble sulphates, and said aqueous supernatant is separately introduced to the contacting zone. When the waste gas contains free oxygen or sulphur trioxide the soluble sulphates may be generated in situ by the addition of ammonia or the oxide, hydroxide, carbonate, bicarbonate, sulphite or bisulphite of sodium, lithium, potassium, magnesium or ammonium or mixtures thereof.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB34374A GB1424941A (en) | 1974-01-04 | 1974-01-04 | Method of removing oxides of sulphur from waste gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB34374A GB1424941A (en) | 1974-01-04 | 1974-01-04 | Method of removing oxides of sulphur from waste gas |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1424941A true GB1424941A (en) | 1976-02-11 |
Family
ID=9702728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34374A Expired GB1424941A (en) | 1974-01-04 | 1974-01-04 | Method of removing oxides of sulphur from waste gas |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1424941A (en) |
-
1974
- 1974-01-04 GB GB34374A patent/GB1424941A/en not_active Expired
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |