US4095964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scrubber tower
Assignee: Individual
•
Filing: 1976-09-28
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Granted: 1978-06-20
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Expires: 1996-09-28
Abstract
Abstract An improved scrubber tower is provided for removing pollutants from hot, corrosive off-gases from chemical processes, such as processes for the production of titanium dioxide pigments. The tower is formed from wood strip baffles treated with fire resistant chemicals arranged in alternate layers extending perpendicularly to each other and secured with titanium fasteners and enclosed in fiber glass walls, the flow passages through the tower being of large cross sectional area relative to the cubic feet of off-gas scrubbed per unit of time as to maintain a relatively low off-gas velocity upwardly through the tower, substantially the same as the velocity that would be present under natural draft conditions, and at low pressures, only slightly above ambient air pressure.
Inventors
- 👤 Francis Earl Carnicle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:02
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
203 words
Apparatus for scrubbing pollutants from an extremely hot, highly corrosive off-gas from a reactor chamber comprising, a scrubber tower comprising stacked baffles arranged in levels with the baffles in each level extending parallel to each other and perpendicular to the baffles in the adjacent levels, said baffles being composed of fire retardant treated wood which can withstand a temperature up to at least 230° F to provide non-combustible, corrosion resistant impact members on the surfaces of which off-gas passing through the scrubber impinge for the entrapment of pollutant particles and the removal thereof from the off-gas stream, a plenum chamber at the bottom of said tower, means connecting said reactor chamber to said plenum chamber and means connected between said reactor chamber and the plenum chamber for cooling said off-gas prior to its entry into said plenum chamber to a temperature below 230° F, means at the top of said scrubber for dispersing water downwardly into said scrubber in a mist of fine droplets so that the impingement surfaces of said baffles are kept continuously coated with a continuous downwardly flowing water stream, and means for exhausting scrubbed gas, substantially free of pollutants, from the top of said scrubber into the ambient air.
Claim 2
Dependent Claim
203 words
Apparatus for scrubbing pollutants from an extremely hot, highly corrosive off-gas from a reactor chamber comprising, a scrubber tower comprising stacked baffles arranged in levels with the baffles in each level extending parallel to each other and perpendicular to the baffles in the adjacent levels, said baffles being composed of fire retardant treated wood which can withstand a temperature up to at least 230° F to provide non-combustible, corrosion resistant impact members on the surfaces of which off-gas passing through the scrubber impinge for the entrapment of pollutant particles and the removal thereof from the off-gas stream, a plenum chamber at the bottom of said tower, means connecting said reactor chamber to said plenum chamber and means connected between said reactor chamber and the plenum chamber for cooling said off-gas prior to its entry into said plenum chamber to a temperature below 230° F, means at the top of said scrubber for dispersing water downwardly into said scrubber in a mist of fine droplets so that the impingement surfaces of said baffles are kept continuously coated with a continuous downwardly flowing water stream, and means for exhausting scrubbed gas, substantially free of pollutants, from the top of said scrubber into the ambient air.
Claim 3
Dependent Claim
64 words
Apparatus according to claim 1 in which the reactor chamber comprises means which emits off-gas containing titanium oxides and the tower framework and the baffles are constructed of fire retardant treated wood secured by titanium fasteners, the framework and baffles being enclosed by fiberglass sheets so that substantially the only materials contacted by the off-gas are either fire retardant treated wood, fiberglass, or titanium.
Claim 4
Dependent Claim
35 words
Apparatus according to claim 1 in which the means connecting said reactor chamber to said plenum chamber includes at least one fan means for pumping a stream of fresh cooling air into said off-gas stream.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |