Patent US3751227A successfully refreshed from Google Patents.
US3751227A
Expired / Lapsed
US
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Reactive waste gas treating device
Assignee: Individual
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Filing: 1971-11-04
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Granted: 1973-08-07
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Expires: 1991-11-04
Abstract
Abstract A waste gas treating device in which a bed of relatively large size particled material which is chemically reactive to at least a portion of the components in the gas is subjected to movement as a stream of waste gas that is to be treated flows therethrough. The particled material is so chosen that it may be disposed to define a porous bed through which the waste gas flows to form layers of nonvolatile salts on the exterior surfaces of the particled material. An ideal particled material for this purpose is crushed limestone that is but slightly soluble in water, but which reacts with waste gases containing certain acids and acid-forming components such as the various oxides of sulfur and nitrogen to form salts thereon. The movement of the particled material in the bed is such that it is constantly recycled, and during the recycling operation may, if desired, be subjected to washing to remove films of salts therefrom. The constant movement of the particles of the material relative to one another also tends to remove the films of formed salts on the exterior surface thereof by abrasive action. Thus, the particles due to the washing and abrasive action has fresh surfaces exposed to the reactive waste gases, and optimum removal of the reactive components from the waste gas is achieved.
Inventors
- 👤 P Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:29
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/60
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
46 words
A device as defined in Claim 1 in which said first means includes: o. a horizontal circular rail that encircles said shell and is secured thereto; and p. a plurality of circumferentially spaced wheels rotatably supported from said framework and on which wheels said rail rests.
Claim 2
Dependent Claim
46 words
A device as defined in Claim 1 in which said second means includes: o. a horizontal circular rail that encircles said tray and is secured thereto; and p. a plurality of circumferentially spaced wheels rotatably supported from said framework and on which wheels said rail rests.
Claim 3
Dependent Claim
71 words
A device as defined in claim 1 in which said third means includes: o. first and second horizontal ring gears that extend around said shell and tray and secured thereto; p. a prime mover; q. a vertical rotatably supported shaft; r. a prime mover that drives said shaft; and s. third and fourth horizontal gears rigidly secured to said shaft and in toothed engagement with said first and second gears respectively.
Claim 4
Dependent Claim
55 words
A device as defined in claim 4 in which at least a portion of said first, second, third and fourth gears are of different diameters to cause said shell and tray to rotate at different speeds and subject said particled material to maximum abrasive action to remove films of slats from the exterior surfaces thereof.
Claim 5
Dependent Claim
66 words
A device as defined in Claim 1 in which said fifth means includes: o. a stationary plow that extends into said tray, with particled material being forced upwardly on said plow to drop downwardly from the upper end thereof by gravity as said tray rotates; and p. a chute that receives said material dis-charging from said plow and directing said particled material into said sixth means.
Claim 6
Dependent Claim
36 words
A device as defined in claim 1 in which said particled material is crushed limestone and said reactive components are at least in part a type that react with said limestone to form water soluble salts.
Claim 7
Independent Claim
360 words
A device for use in removing chemically reactive components from waste gas by contact with particled material that forms slats when in contact with said com-ponents, said device including: a. an open framework; b. a vertical cylindrical shell open at the top and bottom; c. grate means in the lower end of said shell for supporting the lower center portion of a porous bed of said particled material situated within the confines of said shell; d. a ring-shaped tray disposed under said shell that supports the portion of said bed not supported by said grate means; e. first means for rotatably supporting said shell at a fixed elevation on said framework; f. second means for rotatably supporting said tray from said framework at a fixed distance relative to said shell; g. third means for concurrently rotating said shell and tray at different rates of rotation to subject said particled material to abrasive action to remove said salts from the exterior surfaces thereof; h. a waste gas discharge stack situated above said shell; i. fourth means for discharging a stream of waste gas containing reactive components in an upwardly extending direction against said grate means, said stream of waste gas thereafter flowing upwardly through said bed for said reactive components therein to react with said particled material to form salts on the exterior surface thereof, and said waste gas free of the reactive components that have combined chem-ically with said particled material discharging from said bed to flow upwardly through said stack to the ambient atmos-phere; j. fifth means for removing said particled material from said tray as said tray rotates, with said particled material as removed being replaced by particled material from said bed that flows into said tray by gravity; k. sixth means for elevating said material after it has left said tray and depositing the same on the top of said bed in said shell; l. seventh means for effecting a movable seal between said fourth means and tray to prevent the escape of waste gas therebetween; and m. eighth means for effecting a movable seal between said stack and shell to prevent escape of waste gas therebetween.
Claim 8
Dependent Claim
46 words
A device as defined in claim 8 in which said first means includes: n. a horizontal circular rail that encircles said shell and is secured thereto; and o. a plurality of circumferentially spaced wheels rotatably supported from said framework and on which wheels said rail rests.
Claim 9
Dependent Claim
46 words
A device as defined in claim 8 in which said second means includes: n. a horizontal circular rail that encircles said tray and is secured thereto; and o. a plurality of circumferentially spaced wheels rotatably supported from said framework and on which wheels said rail rests.
Claim 10
Dependent Claim
71 words
A device as defined in claim 8 in which said third means includes: n. first and second horizontal ring gears that extend around said shell and tray and secured thereto; o. a prime mover; p. a vertical rotatably supported shaft; q. a prime mover that drives said shaft; and r. third and fourth horizontal gears rigidly secured to said shaft and in toothed engagement with said first and second gears respectively.
References Cited (Backward Citations)
US2520096A
Cited
US2682444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |