GB420539A - Improvements in the purification of combustion gases - Google Patents
Improvements in the purification of combustion gasesInfo
- Publication number
- GB420539A GB420539A GB1695133A GB1695133A GB420539A GB 420539 A GB420539 A GB 420539A GB 1695133 A GB1695133 A GB 1695133A GB 1695133 A GB1695133 A GB 1695133A GB 420539 A GB420539 A GB 420539A
- Authority
- GB
- United Kingdom
- Prior art keywords
- calcium
- washing
- calcium sulphate
- suspension
- calcium carbonate
- 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
In the removal of oxides of sulphur from combustion gases by means of aqueous washing media, deposition on the plant surfaces of calcium sulphate dihydrate is reduced or inhibited by maintaining in suspension in the washing media a large excess, say 5--10 per cent by weight, of solid calcium sulphate dihydrate. It is stated that calcium sulphite or carbonate or flue dust may also have some effect. The washing liquid may be water, but advantageously an aqueous suspension of calcium hydroxide or preferably of calcium carbonate is used. When the washing liquor is used cyclically, an amount of suspended solids is removed therefrom by settling corresponding to "the make" and calcium carbonate added to replace that removed by combination with the gases prior to recirculation of the liquor. Before solids are removed, the washing medium is preferably oxidized to convert calcium sulphite to calcium sulphate, and the settling may be so controlled that whereas calcium sulphate is removed, calcium carbonate remains in suspension. When the washing liquor does not contain lime or calcium carbonate, calcium sulphate in the settled sludge may be recovered for recirculation by elutriation or differential sedimentation. The process may be combined with the periodic flushing of the plant surfaces described and claimed in Specification 416,671, and the apparatus therein described may be used both for the process of the invention, and the combined processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1695133A GB420539A (en) | 1933-03-17 | 1933-06-14 | Improvements in the purification of combustion gases |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB808833A GB416671A (en) | 1933-03-17 | 1933-03-17 | Improvements in and relating to the purification of combustion gases and apparatus therefor |
| GB1695133A GB420539A (en) | 1933-03-17 | 1933-06-14 | Improvements in the purification of combustion gases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB420539A true GB420539A (en) | 1934-12-04 |
Family
ID=9845520
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB808833A Expired GB416671A (en) | 1933-03-17 | 1933-03-17 | Improvements in and relating to the purification of combustion gases and apparatus therefor |
| GB1695133A Expired GB420539A (en) | 1933-03-17 | 1933-06-14 | Improvements in the purification of combustion gases |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB808833A Expired GB416671A (en) | 1933-03-17 | 1933-03-17 | Improvements in and relating to the purification of combustion gases and apparatus therefor |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE656216C (en) |
| FR (1) | FR800083A (en) |
| GB (2) | GB416671A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2726257A1 (en) * | 1976-06-10 | 1977-12-22 | Chiyoda Chem Eng Construct Co | PROCESS FOR DESULFURIZING EXHAUST GASES |
| DE2814644A1 (en) * | 1977-04-05 | 1978-10-19 | Chiyoda Chem Eng Construct Co | METHOD FOR DESULFERIZING EXHAUST GASES WITH THE RECOVERY OF GYPSUM AS A BY-PRODUCT |
| WO2005044354A1 (en) | 2003-11-03 | 2005-05-19 | Glaxo Group Limited | A fluid dispensing device |
| CN114073889A (en) * | 2020-08-14 | 2022-02-22 | 南京理工大学 | A kind of denitration agent for flue gas after oxidation and its denitration process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1234912B (en) * | 1961-12-02 | 1967-02-23 | Otto & Co Gmbh Dr C | Process for removing sulfur oxides from flue gases |
-
1933
- 1933-03-17 GB GB808833A patent/GB416671A/en not_active Expired
- 1933-06-14 GB GB1695133A patent/GB420539A/en not_active Expired
-
1934
- 1934-03-17 FR FR800083D patent/FR800083A/en not_active Expired
- 1934-03-18 DE DEL85557D patent/DE656216C/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2726257A1 (en) * | 1976-06-10 | 1977-12-22 | Chiyoda Chem Eng Construct Co | PROCESS FOR DESULFURIZING EXHAUST GASES |
| DE2814644A1 (en) * | 1977-04-05 | 1978-10-19 | Chiyoda Chem Eng Construct Co | METHOD FOR DESULFERIZING EXHAUST GASES WITH THE RECOVERY OF GYPSUM AS A BY-PRODUCT |
| WO2005044354A1 (en) | 2003-11-03 | 2005-05-19 | Glaxo Group Limited | A fluid dispensing device |
| CN114073889A (en) * | 2020-08-14 | 2022-02-22 | 南京理工大学 | A kind of denitration agent for flue gas after oxidation and its denitration process |
Also Published As
| Publication number | Publication date |
|---|---|
| FR800083A (en) | 1936-06-26 |
| GB416671A (en) | 1934-09-17 |
| DE656216C (en) | 1938-01-31 |
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