US3668833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for incinerating rubbish and cleaning the smoke of incineration
Assignee: WILLIAM FRANCIS CAHILL JR
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Filing: 1970-08-25
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Granted: 1972-06-13
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Expires: 1990-08-25
Abstract
Abstract This specification discloses apparatus for carrying out a method of incinerating rubbish and cleaning the resultant smoke. The apparatus comprises essentially a fire pit, a plenum where smoke is collected, a filter, an after burner, an electrostatic precipitating chamber, an alkaline water wash, a plain water wash, a filter, and a motor driven exhaust fan which passes clean gas to a stack.
Inventors
- 👤 William Francis Cahill Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:13
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/34; B; B03; B03C; B03C3/00; B03C3/01; B03C3/011; F23G5/006; F23J; F23J15/00; F23J15/006; F23J2217/00; F23J2217/10; F23J2217/102; F23J2217/104; F23J2217/50; F23J2219/00; F23J2219/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
22 words
The method of claim 1 together with the steps of periodically removing precipitate from the chamber in which electrostatic precipitation takes place.
Claim 2
Dependent Claim
37 words
The method of claim 1 in which the character of the smoke is continuously monitored before it is passed to the stack and the nature of the filters altered in accordance with information derived from the monitoring.
Claim 3
Dependent Claim
26 words
The method of claim 1 in which the after burning is carried out by an electric arc at a temperature on the order of 6,000* F.
Claim 4
Dependent Claim
22 words
The method of claim 1 in which the electrostatic precipitation is carried out under a potential on the order of 140,000 volts.
Claim 5
Dependent Claim
164 words
In apparatus for burning and reclaiming incombustible components of refuse, a. a fire pit, b. a plenum for collecting smoke generated by combustion in said fire pit, c. a coarse filter assembly adjacent to said plenum, d. an after burner chamber adjacent to said filter assembly and including electric arc generating means, e. a chamber adjacent to said after burner chamber and housing an electrostatic precipitator, f. a chamber adjacent to that housing said electrostatic precipitator and including spray heads for alkaline water, g. a chamber adjacent to that housing the spray heads for alkaline water and including spray heads for plain water, h. a second filter assembly adjacent to said last mentioned chamber, i. a fan for creating a forced draft that draws smoke into said plenum and through said chambers, j. power means for driving said fan; and k. a conduit for passing smoke from said second filter assembly to a stack from which the cleaned smoke is exhausted to the atmosphere.
Claim 6
Dependent Claim
26 words
The apparatus of claim 6 in which the plenum and chambers are constructed as independent modules and later assembled at the site of the fire pit.
Claim 7
Dependent Claim
24 words
The apparatus of claim 6 in which the fire pit includes a clean out door and chutes for charging refuse into said fire pit.
Claim 8
Dependent Claim
16 words
The apparatus of claim 6 in which a portion of the fire pit is installed underground.
Claim 9
Dependent Claim
21 words
The apparatus of claim 6 together with means for removing precipitate from the sides of the chamber housing the electrostatic precipitator.
Claim 10
Dependent Claim
15 words
The apparatus of claim 6 in which the coarse filter assembly comprises two coarse filters.
Claim 11
Dependent Claim
22 words
The apparatus of claim 6 together with an electrometric pH meter mounted on the chamber housing the spray heads for alkaline water.
Claim 12
Dependent Claim
20 words
The apparatus of claim 6 together with a continuously operating monitor mounted in the module containing the second filter assembly.
Claim 13
Dependent Claim
17 words
The apparatus of claim 6 in which the second filter assembly includes both mechanical and chemical filters.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |