Patent US3632304A successfully refreshed from Google Patents.
US3632304A
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Catalytic oxidation of waste gas streams with fluidizable subdivided particles
Assignee: Universal Oil Products Co
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Filing: 1968-09-03
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Granted: 1972-01-04
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Expires: 1988-09-03
Abstract
Abstract Means for effecting the continuous catalytic oxidation of a waste gas stream by providing for the cocurrent flow of subdivided catalyst particles therewith upwardly in the lower part of a reactor-stack unit, separating the catalyst particles from the contacted gas stream at the upper end of the reactor section and returning them to a collecting and flow regulating means for reintroduction into a waste gas inlet zone to the unit. Burner means, mounted in combination with the inlet zone, is utilized to provide a hot gas stream to contact the recirculated catalyst particles and thus heat and regenerate them for use in the continuous catalytic oxidation system.
Inventors
- 👤 Leslie C Hardison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:26
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/06; F23G7/07; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01J; B01J8/00; B01J8/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
The method of claim 1 further characterized in that differential pressure is measured at vertically spaced points within the reactor zone and catalyst recirculation rate is varied responsive to the differential pressure, whereby to in turn provide for variations in the amount of catalyst maintained within the reaction zone and the flow rate therethrough.
Claim 2
Dependent Claim
27 words
The method of claim 1 further characterized in that the oxygen for said fuel burning is supplied as 100 percent secondary air from said waste gas stream.
Claim 3
Dependent Claim
134 words
A unitary-type reactor-stack apparatus for effecting the catalytic oxidation of a waste gas stream, which comprises in combination, an elongated, vertically oriented stack section with a lower heat retaining reactor section, with such reactor section in turn having a lower gas inlet, fuel burner means downstream from said gas inlet and discharging into said reactor section, a lower catalyst inlet and an upper gas-particle separating section, with the latter having a gas outlet and means for effecting the separation and collection of particles from the resulting contacted gas stream, pathway means extending from the latter downwardly along the outer wall of the reactor for passing catalyst particles downwardly to said catalyst inlet, and upper stack means connective with and extending above said reactor section for effecting the discharge of a treated waste gas stream.
Claim 4
Dependent Claim
65 words
The unitary-type reactor-stack apparatus of claim 4 further characterized in that differential pressure sensing means is provided within said reactor section and such means connected with a differential pressure control means in turn connecting to and adjustably regulating catalyst flow control means at said lower catalyst inlet whereby the rate of catalyst particles feeding into admixture witH the waste gas stream may be automatically regulated.
Claim 5
Dependent Claim
42 words
The reactor-stack apparatus of claim 4 still further characterized in that said fuel burner means is provided with means to receive and mix said stream therein whereby 100 percent of its air is supplied as secondary air from said waste gas stream.
Claim 6
Dependent Claim
45 words
The reactor-stack apparatus of claim 4 further characterized in that directional vanes are provided at the upper end portion of the reactor section whereby catalyst particles will be centrifugally thrown to the outer portion of said gas-particle separating outlet section for a subsequent descending flow.
References Cited (Backward Citations)
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US2358497A
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US2526689A
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US2685343A
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US3231326A
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US3243265A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |