US3817192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace, particularly for combustion of garbage and sewage sludge
Assignee: Arbman Development AB
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Filing: 1973-03-09
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Granted: 1974-06-18
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Expires: 1993-03-09
Abstract
Abstract A furnace, especially for combustion of garbage and sewage sludge comprises a cylindrical combustion chamber having a horizontal or vertical axis. The radius of the combustion chamber substantially corresponds to or is preferably bigger than the width or height, respectively, of the chamber which has one or more tangential inlets and a central axially directed outlet. A spiral-shaped flame containing partly still unburnt particles rotating in the outer part of the combustion zone and partly largely burnt dust-like ash particles rotating in or towards the centre of the gas whirl, which escapes through the gas outlet, is generated.
Inventors
- 👤 P Watterback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:51
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/001; F23G5/00; F23G5/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A furnace, particularly for combustion of garbage and sewage sludge comprising: a. a combustion chamber defined by a cylindrical wall having at least one inlet opening therethrough the height of said cylindrical wall being equal to or less than the radius of the cylinder, a first end plate attached to one end of said cylindrical wall, said first end plate having an opening therethrough concentric with its central axis to allow the escape of exhaust gases from said chamber, and a second end plate attached to and closing the opposite end of said cylindrical wall, b. at least one conduit means attached to said cylindrical wall to direct combustible material tangentially into said combustion chamber through said at least one inlet opening, and c. ignition device to ignite said combustible materials.
Claim 2
Dependent Claim
131 words
A furnace, particularly for combustion of garbage and sewage sludge comprising: a. a combustion chamber defined by a cylindrical wall having at least one inlet opening therethrough the height of said cylindrical wall being equal to or less than the radius of the cylinder, a first end plate attached to one end of said cylindrical wall, said first end plate having an opening therethrough concentric with its central axis to allow the escape of exhaust gases from said chamber, and a second end plate attached to and closing the opposite end of said cylindrical wall, b. at least one conduit means attached to said cylindrical wall to direct combustible material tangentially into said combustion chamber through said at least one inlet opening, and c. ignition device to ignite said combustible materials.
Claim 3
Dependent Claim
31 words
A furnace according to claim 1, characterized by a deflection means located at the tangentially directed inlet and arranged to deflect admitted products towards the outer wall of the combustion chamber.
Claim 4
Dependent Claim
25 words
A furnace according to claim 2, characterized in that the said deflection means consists of an extended portion of the wall of the combustion chamber.
Claim 5
Dependent Claim
58 words
A furnace according to claim 2, characterized in that on the outside of that section of the outer wall of the combustion chamber towards which the admitted products are deflected there is a duct for supply of preheated intake air, said wall section being provided with perforations so that the air is supplied directly to the fed-in products.
Claim 6
Dependent Claim
41 words
A furnace according to claim 1, characterized in that an essential part of the combustion chamber is surrounded by an intake duct for intake air, which during absorption of heat serves for cooling of the outer wall of the combustion chamber.
Claim 7
Dependent Claim
50 words
A furnace according to claim 1, the furnace cylinder having an essentially vertical axis direction, characterized in that the bottom part of the furnace has a largely conical shape for collection of sand and similar incombustible particles, a discharge device being connected to the conical bottom part of the furnace.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |