US3708266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning sulphur dioxide-containing flue gases
Assignee: Bahco Ventilation AB
•
Filing: 1970-07-24
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Granted: 1973-01-02
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Expires: 1990-07-24
Abstract
Abstract In an apparatus for cleansing flue gases containing sulphur dioxide, an absorbent material slurry is circulated through or adjacent the bottom of an upstanding absorption column through which the flue gas passes. A grinding mill is provided in the circulation system for the slurry so as to remove the sulphite and/or sulphate compounds which coat and inactivate the particles of absorbent material and to expose additional active surface.
Inventors
- 👤 K Gustavsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:12
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/501; B01D53/502; B01D53/14; B01D53/1456; B01D53/1481; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/15
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
The apparatus of claim 1 in which the conduit from said droplet separator is arranged to permit the mill to be operated by the circulated slurry itself.
Claim 2
Dependent Claim
30 words
The apparatus of claim 2 in which the height of the droplet separator above the mill is such that the mill is operated by the kinetic energy of the slurry.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 in which a pump is connected in series with the mill to impart kinetic energy to the slurry for grinding.
Claim 4
Dependent Claim
25 words
The apparatus of claim 1 in which a pump is connected in parallel to the mill to impart kinetic energy to the slurry for grinding.
Claim 5
Dependent Claim
17 words
The apparatus of claim 1 including a supply vessel for fresh absorbent material connected to said container.
References Cited (Backward Citations)
US1632340A
Cited
US2080779A
Cited
US2142406A
Cited
GB615652A
Cited
US3608281A
Cited
US3514283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |