US4091747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste incinerator system
Assignee: Trecan Combustion Ltd
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Filing: 1976-03-22
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Granted: 1978-05-30
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Expires: 1996-03-22
Abstract
Abstract A waste incinerator system, particularly suitable for bulk waste contaminated with radioactivity, is provided with a primary, upright combustion chamber with a removable, frusto-conical bottom section. The chamber is of the type having a double shell with cooling air passage therethrough. The cooling air is introduced at two different, vertically spaced levels, whereby the temperature control of the double shell can be effected by selectively controlling the volume of air incoming at the two levels. Only the bottom, frusto-conical removable portion of the combustion chamber is provided with refractory lining, the remainder of the chamber having a heat resistant steel inside wall, whereby the build-up of radioactivity levels within the chamber is reduced. The refractory of the frusto-conical bottom portion of the chamber is replaceable.
Inventors
- 👤 Charles Edgar Chase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:12
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/06; F23G; F23G5/00; F23G5/006; F23G5/08; F23G5/14; F23G5/16; F23M; F23M5/00; F23M5/08; F23M5/085; G; G21; G21F; G21F9/00; G21F9/28; G21F9/30; G21F9/32; F23G2202/00; F23G2202/10; F23G2202/101; F23G2202/102; F23G2202/103; F23G2205/00; F23G2205/18; F23G2207/00; F23G2207/20; F23G2209/00; F23G2209/10; F23G2209/102; F23G2209/18; F23G2209/22; F23G2209/26; F23G2209/261; F23G2209/28; F23J2217/00; F23J2217/10; F23J2217/101; Y; Y02; Y02E; Y02E20/00; Y02E20/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
A waste incinerator system for incinerating a batch of solid waste, said system including a combustion chamber having flue outlet means including an afterburner, said combustion chamber being of the type of an upright, generally cylindrical vessel having a heat resistant steel inner shell and a metal outer shell, said shells being arranged in a concentric fashion to provide an intermediate space for passage of temperature control air, (a) the lower end of said combustion chamber being detachably secured to a downwardly converging frusto-conical bottom section the lower end of which terminates at an ash outlet; (b) means for introducing temperature control air into said intermediate space; and (c) means for discharging said air from said intermediate space, said means for discharging said air from said intermediate space being arranged for discharging the air into said flue outlet means.
Claim 2
Dependent Claim
139 words
A waste incinerator system for incinerating a batch of solid waste, said system including a combustion chamber having flue outlet means including an afterburner, said combustion chamber being of the type of an upright, generally cylindrical vessel having a heat resistant steel inner shell and a metal outer shell, said shells being arranged in a concentric fashion to provide an intermediate space for passage of temperature control air, (a) the lower end of said combustion chamber being detachably secured to a downwardly converging frusto-conical bottom section the lower end of which terminates at an ash outlet; (b) means for introducing temperature control air into said intermediate space; and (c) means for discharging said air from said intermediate space, said means for discharging said air from said intermediate space being arranged for discharging the air into said flue outlet means.
Claim 3
Dependent Claim
40 words
A system as claimed in claim 1 wherein said means for introducing temperature control air into said intermediate space is disposed at at least two different levels vertically spaced from each other, to selectively control the temperature of said shells.
Claim 4
Dependent Claim
30 words
A system as claimed in claim 1 wherein said means for introducing the temperature control air into said intermediate space includes means for introducing air into said flue outlet means.
Claim 5
Dependent Claim
53 words
A system as claimed in claim 3, wherein said afterburner is of the type of the double-shell combustion chamber with a cooling air passage between the shells thereof, the passage being separate from said intermediate space and being operatively associated with said means for introducing the temperature control air into said intermediate space.
Claim 6
Dependent Claim
40 words
A system as claimed in claim 1, wherein said inner shell of the upright cylindrical vessel forms the inside wall of the vessel, while the inside wall of said frusto-conical bottom section is formed by a shell lined with refractory.
Claim 7
Dependent Claim
121 words
A system as claimed in claim 2, wherein said means for introducing the temperature control air into said intermediate space is an air blower, the discharge end of which is arranged to selectively communicate with a first annular air chamber located at a lower portion of said frusto-conical bottom section and communicating with said intermediate space of the frustoconical portion; and a second annular air chamber surrounding the bottom portion of said upright cylindrical vessel near the joinder thereof with said frusto-conical bottom section, said second annular air chamber communicating with said intermediate space of said upright cylindrical vessel, the intermediate space of said frusto-conical bottom section being arranged to communicate with the intermediate space of said upright, generally cylindrical vessel.
Claim 8
Dependent Claim
67 words
A system as claimed in claim 6, wherein said upright, generally cylindrical vessel is provided with burners located in a generally horizontal level, equidistantly spaced about the periphery of said chamber and directed generally radially with respect to the upright axis of the vessel, the level at which said burners are located being disposed between said flue outlet and the uppermost part of said frusto-conical bottom section.
Claim 9
Dependent Claim
31 words
A system as claimed in claim 1, further comprising waste oil injection means passing through the wall of said vessel and located above the level in which said burners are located.
Claim 10
Dependent Claim
93 words
A system as claimed in claim 1, further comprising flue gas cooling air supply means operatively connected to a flue gas cooling heat exchanger located downstream of said afterburner and upstream of a filter means, said filter means being located upstream of a stack of said system, said heat exchanger including a cooling air exhaust adapted to selectively communicate with a stack and/or with intake of an air blower of said means for introducing the temperature control air, said blower also being provided with means for supplying ambient air to the intake thereof.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |