Patent US3941572A successfully refreshed from Google Patents.
US3941572A
Expired / Lapsed
US
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Process for gas-absorption and dust-removal
Assignee: Kubota Kasui Corp
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Filing: 1974-10-21
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Granted: 1976-03-02
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Expires: 1994-10-21
Abstract
Abstract A process for gas-absorption and dust-removal with an excellently high rate and capacity is provided wherein gas containing a specific gas component to be absorbed and/or fine dust to be removed is passed upwardly through a perforated plate or grid plate tower without weir and downcomer having a free-space ratio of 0.25 - 0.60, where said gas is contacted countercurrently with liquid absorbent under the stated conditions.
Inventors
- 👤 Hisashi Uchiyama
- 👤 Naohiko Meno
- 👤 Teizo Senjo
- 👤 Makio Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:47
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/501
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
A process for removing a specific gas component and/or fine dust particles from a gas which comprises passing said gas containing the specific gas component and/or find dust particles upwardly through a plate tower comprising at least one perforated or grid plate without weir and downcomer, said plate having a free-space rate. (Fc) in the range from 0.25 to 0.60 and passing said gas through the tower at a superficial gas velocity within a range from 3 to 5.8 m/sec, and simultaneously passing a liquid absorbent downwardly through said plate tower at a liquid flow rate of not less than about 9300 kg/m 2 . hr, said liquid flow rate increasing as the free space ratio increases to not less than about 17,100 kg/m 2 . hr at a free space ratio of 0.60, wherein the liquid flows in a counter current flow relationship to the upflowing gas, the liquid to gas ratio (L/G) being in the range from 0.5 to 25.
Claim 2
Dependent Claim
162 words
A process for removing a specific gas component and/or fine dust particles from a gas which comprises passing said gas containing the specific gas component and/or find dust particles upwardly through a plate tower comprising at least one perforated or grid plate without weir and downcomer, said plate having a free-space rate. (Fc) in the range from 0.25 to 0.60 and passing said gas through the tower at a superficial gas velocity within a range from 3 to 5.8 m/sec, and simultaneously passing a liquid absorbent downwardly through said plate tower at a liquid flow rate of not less than about 9300 kg/m 2 . hr, said liquid flow rate increasing as the free space ratio increases to not less than about 17,100 kg/m 2 . hr at a free space ratio of 0.60, wherein the liquid flows in a counter current flow relationship to the upflowing gas, the liquid to gas ratio (L/G) being in the range from 0.5 to 25.
Claim 3
Dependent Claim
19 words
The process as claimed in claim 1, wherein said freespace ratio of the plate is between 0.30 and 0.50.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the liquid to gas ratio (L/G) is in the range of 1 to 3.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |