GB420539A - Improvements in the purification of combustion gases - Google Patents

Improvements in the purification of combustion gases

Info

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
Application number
GB1695133A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB1695133A priority Critical patent/GB420539A/en
Publication of GB420539A publication Critical patent/GB420539A/en
Expired legal-status Critical Current

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.
GB1695133A 1933-03-17 1933-06-14 Improvements in the purification of combustion gases Expired GB420539A (en)

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)

* Cited by examiner, † Cited by third party
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 Denitration agent for oxidized flue gas and denitration process thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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 Denitration agent for oxidized flue gas and denitration process thereof

Also Published As

Publication number Publication date
DE656216C (en) 1938-01-31
FR800083A (en) 1936-06-26
GB416671A (en) 1934-09-17

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