GB1376404A - Process for working up the wash solution obtained in the washing of so2-containing off-gas using aqueous ammonia - Google Patents
Process for working up the wash solution obtained in the washing of so2-containing off-gas using aqueous ammoniaInfo
- Publication number
- GB1376404A GB1376404A GB1471172A GB1471172A GB1376404A GB 1376404 A GB1376404 A GB 1376404A GB 1471172 A GB1471172 A GB 1471172A GB 1471172 A GB1471172 A GB 1471172A GB 1376404 A GB1376404 A GB 1376404A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- content
- split
- wash solution
- wash
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/60—Isolation of sulfur dioxide from gases
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
1376404 Sulphuric acid, sulphur dioxide CHEMIEBAU DR A ZIEREN GmbH & CO KG 29 March 1972 [31 Aug 1971] 14711/72 Heading C1A The sulphur content of a wash solution obtained by scrubbing SO 2 containing gases with aqueous ammonia is obtained and the nitrogen content of the solution rendered ecologically innocuous by mixing the wash solution, which contains ammonium sulphite, bisulphite, and optionally sulphate if the gas scrubbed contained SO 3 , with a quantity of sulphuric acid at least sufficient to liberate all the SO 2 from the sulphite and bisulphite content of the wash solution, and the resulting ammonium sulphate containing liquor is evaporated by direct heat-exchange with hot split gas, obtained as hereinafter explained, to a water content of from 15 to 55% by weight, and the concentrated mixture so obtained is heated at a temperature of 900‹ to 1250‹ C. with the simultaneous combustion of a carbon and/or sulphur containing fuel to form an SO 2 containing split gas which hot split gas is used for the evaporation and thereafter its SO 2 content is converted to sulphuric acid using the contact process. After being used for the evaporation the hot split gas may be washed before being subjected to the contact process and the wash solution to be treated by the process of invention is mixed with the H 2 SO 4 -containing wash acid from washing the split-gas to liberate its SO 2 content. Alternatively, a portion of the product acid from the contact process may be used to acidify the ammoniacal wash liquors being treated, to liberate their SO 2 content. The wash solution being treated and the acidifying sulphuric acid may be sprayed into a tower through which the hot split-gas flows upwardly. The SO 2 liberated from the ammonium salt content of the used wash liquor being acidified may be separated from the accompanying aqueous solutions and added to the split gas after it has been used for evaporation. The water content of the ammonium sulphate containing liquor may be reduced to 25 to 50 wt. per cent in the evaporating step. The concentrated liquor may be split at a temperature of 1000‹ to 1100‹C. using a residence time of 0À3 to 15 sees. in the splitting chamber. The splitting step may be carried out so that the oxygen content of the gases leaving the splitting chamber is from 2 to 10 vol. per cent. The SO 2 containing gas used for the present process may be tail-gas from a sulphuric acid plant or flue gas from the combustion of a sulphur containing fuel.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712143444 DE2143444B2 (en) | 1971-08-31 | 1971-08-31 | PROCESS FOR PROCESSING THE WASHING SOLUTION DURING THE WASHING OF EXHAUST GASES OF SO DEEP TWO |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1376404A true GB1376404A (en) | 1974-12-04 |
Family
ID=5818201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1471172A Expired GB1376404A (en) | 1971-08-31 | 1972-03-29 | Process for working up the wash solution obtained in the washing of so2-containing off-gas using aqueous ammonia |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS4834775A (en) |
DE (1) | DE2143444B2 (en) |
GB (1) | GB1376404A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100368061C (en) * | 2003-09-24 | 2008-02-13 | 郑州海天电力环保实业有限公司 | Integration method for ammonia process of desulfurizing flue gas and multiple utilizing desulfurized products and equipment |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2333518C3 (en) * | 1973-07-02 | 1981-02-26 | Dr. C. Otto & Comp. Gmbh, 4630 Bochum | Process for removing ammonia from gases |
JPS5211648A (en) * | 1975-07-16 | 1977-01-28 | Kurita Water Ind Ltd | Waste water treatment method |
JPS5852216B2 (en) * | 1980-01-30 | 1983-11-21 | イ−・アイ・デュポン・ド・ネモア−ス・アンド・コンパニ− | film processing equipment |
DE3712724A1 (en) * | 1987-04-15 | 1988-11-03 | Metallgesellschaft Ag | METHOD FOR DRYING HUMID, GRANULATED, AMMONIUM OR ALKALINE CONTAINERS |
-
1971
- 1971-08-31 DE DE19712143444 patent/DE2143444B2/en not_active Withdrawn
-
1972
- 1972-03-29 GB GB1471172A patent/GB1376404A/en not_active Expired
- 1972-05-27 JP JP47052904A patent/JPS4834775A/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100368061C (en) * | 2003-09-24 | 2008-02-13 | 郑州海天电力环保实业有限公司 | Integration method for ammonia process of desulfurizing flue gas and multiple utilizing desulfurized products and equipment |
Also Published As
Publication number | Publication date |
---|---|
DE2143444B2 (en) | 1972-11-23 |
DE2143444A1 (en) | 1972-11-23 |
JPS4834775A (en) | 1973-05-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |