US3894833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste grease-burning system and apparatus
Assignee: Envirotech Corp
•
Filing: 1973-04-18
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Granted: 1975-07-15
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Expires: 1993-04-18
Abstract
Abstract Apparatus for incinerating grease-laden aqueous mixtures includes a burner assembly or having a swirl chamber whereinto the liquid is tangentially fed and swirled. From a nozzle connected to the chamber, a minor fraction of the feed mixture is emitted as a rotating, atomized spray for subsequent ignition. A major fraction of the feed is continuously recycled thereby maintaining a high liquid flow rate through the burner assembly.
Inventors
- 👤 Ulf F Rinecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/001; C; C02; C02F; C02F11/00; C02F11/12; C02F11/13
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
205 words
An apparatus for burning combustible liquid-solid mixtures, such as waste-water skimmings or the like comprising: a. a nozzle assembly which includes a swirl chamber and a nozzle which tapers outwardly and convergingly from said chamber to an outlet end having a single opening therein of sufficient size to allow passage of solid particles therethrough; b. means in flow communication with the intertior of said swirl chamber for delivering a feed of a liquid-solid mixture thereinto in a generally tangential direction whereby said entering feed swirls about in said chamber; c. an unobstructed return pipe connected in direct and immediate communication with a second opening in said swirl chamber, said second opening being in immediate flow communication with the interior of said chamber for unrestricted reCycling through said return pipe of a major fraction of said feed, the remaining fraction of said feed being sprayed from said nozzle; d. conduit means spacedly surrounding said nozzle assembly and having an open end surrounding said nozzle; and e. inlet means in communication with said conduit means for delivering a flow of oxygen-bearing gas thereinto to flow out said open end of said conduit to mix with the spray from said nozzle and to provide an oxidizing medium therefor.
Claim 2
Independent Claim
205 words
An apparatus for burning combustible liquid-solid mixtures, such as waste-water skimmings or the like comprising: a. a nozzle assembly which includes a swirl chamber and a nozzle which tapers outwardly and convergingly from said chamber to an outlet end having a single opening therein of sufficient size to allow passage of solid particles therethrough; b. means in flow communication with the intertior of said swirl chamber for delivering a feed of a liquid-solid mixture thereinto in a generally tangential direction whereby said entering feed swirls about in said chamber; c. an unobstructed return pipe connected in direct and immediate communication with a second opening in said swirl chamber, said second opening being in immediate flow communication with the interior of said chamber for unrestricted reCycling through said return pipe of a major fraction of said feed, the remaining fraction of said feed being sprayed from said nozzle; d. conduit means spacedly surrounding said nozzle assembly and having an open end surrounding said nozzle; and e. inlet means in communication with said conduit means for delivering a flow of oxygen-bearing gas thereinto to flow out said open end of said conduit to mix with the spray from said nozzle and to provide an oxidizing medium therefor.
Claim 3
Dependent Claim
42 words
An apparatus according to claim 1 wherein said inlet means for said conduit means includes means tangentially connected thereto to introduce the gas in a flow which has a rotational component opposite to the rotation of the feed mixture in said chamber.
Claim 4
Dependent Claim
15 words
An apparatus according to claim 1 wherein said swirl chamber has a generally cylindrical interior.
Claim 5
Dependent Claim
18 words
An apparatus according to claim 1 wherein said opening in the end of said nozzle is axially located.
Claim 6
Dependent Claim
26 words
An apparatus according to claim 4 including a straight tubular piece coaxially connected into said open end of said nozzle thereby defining the outlet from nozzle.
Claim 7
Dependent Claim
19 words
An apparatus according to claim 5 wherein the inside diameter of said tubular piece is at least 0.5 inches.
Claim 8
Dependent Claim
17 words
An apparatus according to claim 1 wherein said open end is at least 0.5 inches in diameter.
Claim 9
Dependent Claim
23 words
An apparatus according to claim 1 further including gas pilot means stationarily fixed relative to said nozzle for igniting the material sprayed therefrom.
Claim 10
Dependent Claim
23 words
An apparatus according to claim 1 where at least 80% of the feed is returned from said swirl chamber through said return means.
Claim 11
Dependent Claim
22 words
An apparatus according to claim 1 where between 80-98% of the feed is returned from said swirl chamber through said return means.
Claim 12
Dependent Claim
24 words
An apparatus according to claim 1 wherein said conduit mean annularly surrounds said nozzle assembly thereby to permit an annular flow of air therearound.
References Cited (Backward Citations)
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |