US3745941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slagging refuse incinerators
Assignee: Individual
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Filing: 1971-12-03
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Granted: 1973-07-17
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Expires: 1991-12-03
Abstract
Abstract My invention relates to a method and apparatus for incinerating refuse including the steps of fusing the ash and metallic content of the refuse and quenching the fused material in water to reduce the solid waste discharge to a granular slag for disposal. The apparatus comprises a primary incinerating furnace operated at conventioal incinerating temperature and a slagging furnace in series. The slagging furnace operates at a higher temperature to complete combustion of residual combustible material and to fuse the solid residue. In this apparatus the flues are arranged to provide parallel flow of portions of the flue gas from the primary furnace, one portion passing overhead at relatively low temperature and the other portion passing through the slagging furnace to supply the oxygen to generate the heat for fusing the solid residue.
Inventors
- 👤 B Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:47
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/08; F23G5/085
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
A method of incinerating refuse and reducing the consumed solids to granular slag comprising the steps of burning the refuse in a primary furnace to consume the greater part of said refuse, supplying sufficient excess air to said primary furnace to maintain the flue gas therefrom at substantially conventional temperature for incinerator operation, flowing the partially consumed refuse downwardly from said primary furnace into and through a downwardly inclined slagging furnace, diverting a portion of the flue gas from said primary furnace into the upper end of said slagging furnace in quantity containing sufficient oxygen to substantially complete combustion of said refuse and maintain said slagging furnace at a solids-melting temperature, passing the undiverted portion of said flue gas overhead above said slagging furnace through a flue shielded from radiation from said slagging furnace, passing the diverted portion of said flue gas after passing through said slagging furnace upwardly through a substantially vertical flue to recombine with the undiverted portion after its passage above said slagging furnace.
Claim 2
Independent Claim
167 words
A method of incinerating refuse and reducing the consumed solids to granular slag comprising the steps of burning the refuse in a primary furnace to consume the greater part of said refuse, supplying sufficient excess air to said primary furnace to maintain the flue gas therefrom at substantially conventional temperature for incinerator operation, flowing the partially consumed refuse downwardly from said primary furnace into and through a downwardly inclined slagging furnace, diverting a portion of the flue gas from said primary furnace into the upper end of said slagging furnace in quantity containing sufficient oxygen to substantially complete combustion of said refuse and maintain said slagging furnace at a solids-melting temperature, passing the undiverted portion of said flue gas overhead above said slagging furnace through a flue shielded from radiation from said slagging furnace, passing the diverted portion of said flue gas after passing through said slagging furnace upwardly through a substantially vertical flue to recombine with the undiverted portion after its passage above said slagging furnace.
Claim 3
Dependent Claim
30 words
The method of claim 1 further characterized by controlling the ratio of diverted to undiverted flue gas flow by throttling said overhead shielded flue in the undiverted flue gas stream.
Claim 4
Dependent Claim
51 words
The method of claim 1 further characterized by discharging said melted slag into a water quench and solids granulating trough and sealing the passage for solids into said trough against the passage of flue gas by maintaining a water level in said trough above the bottom of said substantially vertical flue.
Claim 5
Dependent Claim
134 words
Apparatus for incinerating refuse and reducing the residue to slag comprising a primary incinerating furnace section and a slagging furnace section in series, the said primary incinerating furnace section being at a higher elevation than said slagging furnace section, the said slagging furnace section being downwardly inclined to provide gravity flow of slag therethrough, an overhead flue from said primary incinerating furnace section above said slagging furnace section, a substantially vertical flue between the discharge end of said slagging furnace section and said overhead flue at its downstream end, an adjustable damper in said overhead flue for regulating the ratio of gas passing therethrough to gas diverted to flow through said slagging furnace section, and a refractory roof for said slagging furnace section shielding said overhead flue from radiation from said slagging furnace section.
Claim 6
Dependent Claim
134 words
Apparatus for incinerating refuse and reducing the residue to slag comprising a primary incinerating furnace section and a slagging furnace section in series, the said primary incinerating furnace section being at a higher elevation than said slagging furnace section, the said slagging furnace section being downwardly inclined to provide gravity flow of slag therethrough, an overhead flue from said primary incinerating furnace section above said slagging furnace section, a substantially vertical flue between the discharge end of said slagging furnace section and said overhead flue at its downstream end, an adjustable damper in said overhead flue for regulating the ratio of gas passing therethrough to gas diverted to flow through said slagging furnace section, and a refractory roof for said slagging furnace section shielding said overhead flue from radiation from said slagging furnace section.
Claim 7
Dependent Claim
67 words
Apparatus of claim 4 further characterized by having a water trough below said slagging furnace section, an outlet into said water trough at the lower end of said slagging furnace section, said outlet extending below the water level of said trough to seal said outlet against gas flow and direct the exit of all flue gas from the slagging furnace section upwards through said substantially vertical flue.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |