CA2336436A1 - Process for producing gypsum from a calcium sulfite gas desulfurization slurry - Google Patents
Process for producing gypsum from a calcium sulfite gas desulfurization slurry Download PDFInfo
- Publication number
- CA2336436A1 CA2336436A1 CA 2336436 CA2336436A CA2336436A1 CA 2336436 A1 CA2336436 A1 CA 2336436A1 CA 2336436 CA2336436 CA 2336436 CA 2336436 A CA2336436 A CA 2336436A CA 2336436 A1 CA2336436 A1 CA 2336436A1
- Authority
- CA
- Canada
- Prior art keywords
- calcium sulfite
- slurry
- gas desulfurization
- maintained
- aqueous slurry
- 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
Abstract
Calcium sulfate dehydrate (dehydrate gypsum) is produced from an aqueous flue gas desulfurization slurry containing primarily calcium sulfite. The aqueous slurry, containing calcium sulfite, is charged, at a pH of about 5.8 to 6.0 into the top of a vertically oriented pressurized oxidation vessel and passed downwardly therethrough while contacting the aqueous slurry with a countercurrent flow of oxygen-containing gas. The pressure in the bottom portion of the oxidation vessel is maintained at about 22-32 psig, and a pressure in the top portion of the oxidation vessel is maintained at about 10-17 psig. The aqueous slurry is maintained at a pH of about 4.0-5.5 and at a temperature of between about 180-217°F in the vessel such that calcium sulfite in the aqueous slurry is oxidized to dehydrate gypsum with the oxidized slurry removed from the bottom of the oxidation vessel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54232100A | 2000-04-04 | 2000-04-04 | |
| US09/542,321 | 2000-04-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2336436A1 true CA2336436A1 (en) | 2001-10-04 |
| CA2336436C CA2336436C (en) | 2004-10-05 |
Family
ID=24163310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2336436 Expired - Lifetime CA2336436C (en) | 2000-04-04 | 2001-03-01 | Process for producing gypsum from a calcium sulfite gas desulfurization slurry |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2336436C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8173090B2 (en) | 2010-07-08 | 2012-05-08 | Air Products And Chemicals, Inc. | Sorbent use with oxyfuel sour compression |
| CN108744940A (en) * | 2018-04-24 | 2018-11-06 | 北京北科环境工程有限公司 | A kind of desulfurizing byproduct oxidation unit |
-
2001
- 2001-03-01 CA CA 2336436 patent/CA2336436C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8173090B2 (en) | 2010-07-08 | 2012-05-08 | Air Products And Chemicals, Inc. | Sorbent use with oxyfuel sour compression |
| CN108744940A (en) * | 2018-04-24 | 2018-11-06 | 北京北科环境工程有限公司 | A kind of desulfurizing byproduct oxidation unit |
| CN108744940B (en) * | 2018-04-24 | 2023-10-20 | 北京北科环境工程有限公司 | Desulfurization by-product oxidation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2336436C (en) | 2004-10-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20210301 |