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US3938451A Expired / Lapsed US ⏱️ 0.0 years remaining

Gasifier charging system

Assignee: Sofresid SA
•
Filing: 1975-01-03
•
Granted: 1976-02-17
•
Expires: 1995-01-03
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Abstract

Abstract A refuse feeder and charging system is provided for a solid waste destruction system wherein a high temperature disposal of waste materials occurs. In such a destruction system, waste materials must be fed or charged to the upper end of a vertical gasification chamber from which the waste materials move downwardly under the force of gravity as the combustible materials are converted to molten slag and resultant gases and vapors. The refuse feeder includes a storage hopper for uniformly feeding solid waste material contained therein to a conduit means which conveys the waste material to the aforesaid gasification chamber. The storage hopper further includes an inclined vibrating pan in the bottom thereof for facilitating the uniform conveyance of waste material to the conduit means and a first set of sealing doors which may be opened and closed for purposes of batch filling the storage hopper. The refuse feeder or charging system additionally includes a second set of sealing doors disposed between the storage hopper and the conduit means which normally open only during conveyance of waste material to the conduit means. The combination of the first and second set of sealing doors insures the sealing of the charging system from the ambient atmosphere so that a minimum amount of external air is entrained in the waste material fed to the destruction system. A third set of doors is provided on the conduit means which serves as an alternative method of feeding waste material directly into the conduit means and gasification chamber should the storage hopper and first and second set of doors be out of service for any reason. The third set of doors also provides a mechanism for pressure release should an explosion of any sort take place within the gasification chamber and connected conduit means thereby protecting the system from structural damage.

Inventors

  • 👤 Theodore W. Lucas, Jr.

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 05:09
CPC Classifications
F; F23; F23K; F23K3/00; F23K3/16; C; C10; C10J; C10J3/00; C10J3/02; C10J3/20; C10J3/30; C10J2200/00; C10J2200/15

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 216 words
A refuse feeder for a solid waste destruction system having a gasification chamber and conduit means for conveying solid waste materials to the gasification chamber in which the flame temperature of the waste materials is reached so as to reduce the waste materials to a molten condition with resulting gases and vapors being produced, and means for removing the molten waste material, resulting gases, and vapors from the system; said refuse feeder comprising: a storage hopper means for receiving solid waste material wherein said storage hopper is adapted to communicate with said conduit means so as to urge waste material toward said conduit means, first sealing door means movable between open and closed positions and being mounted on said storage hopper, said first sealing door means being normally in a closed position to seal the interior of said storage hopper means from the ambient atmosphere and being in an open position for filing of said hopper means with waste material, and second sealing door means movable between open and closed positions and being mounted intermediate to said storage hopper means and said conduit means whereby said second sealing door means is in a normally closed position to seal said conduit means from said ambient atmosphere when said first sealing door means is in an open position.
Claim 2
Dependent Claim 216 words
A refuse feeder for a solid waste destruction system having a gasification chamber and conduit means for conveying solid waste materials to the gasification chamber in which the flame temperature of the waste materials is reached so as to reduce the waste materials to a molten condition with resulting gases and vapors being produced, and means for removing the molten waste material, resulting gases, and vapors from the system; said refuse feeder comprising: a storage hopper means for receiving solid waste material wherein said storage hopper is adapted to communicate with said conduit means so as to urge waste material toward said conduit means, first sealing door means movable between open and closed positions and being mounted on said storage hopper, said first sealing door means being normally in a closed position to seal the interior of said storage hopper means from the ambient atmosphere and being in an open position for filing of said hopper means with waste material, and second sealing door means movable between open and closed positions and being mounted intermediate to said storage hopper means and said conduit means whereby said second sealing door means is in a normally closed position to seal said conduit means from said ambient atmosphere when said first sealing door means is in an open position.
Claim 3
Dependent Claim 31 words
A refuse feeder as set forth in claim 1 wherein said storage hopper means includes a pan means in the bottom portion thereof for urging waste material toward said conduit means.
Claim 4
Dependent Claim 41 words
A refuse feeder as set forth in claim 2 wherein said pan means is inclined towards said conduit means and includes a pan drive means for driving said pan means so that waste material is affirmatively urged towards said conduit means.
Claim 5
Dependent Claim 48 words
A refuse feeder as set forth in claim 2 further including a first drive means connected to said first sealing door means and a second drive means connected to said second sealing door means, both said drive means respectively driving said door means between open and closed positions.
Claim 6
Dependent Claim 34 words
A refuse feeder as set forth in claim 4 wherein said pan means includes a pan drive means for driving said pan means so that waste material is affirmatively urged towards said conduit means.
Claim 7
Dependent Claim 68 words
A refuse feeder as set forth in claim 5 including control means for operationally interconnecting and controlling said first drive means, said second drive means, and said pan drive means so that said second door means will be closed when said first door means is opened, and said pan drive means will selectively operate when said first door means is closed and said second door means is open.
Claim 8
Dependent Claim 53 words
A refuse feeder as set forth in claim 1 further including third sealing door means movable between open and closed positions and being mounted in an outer wall portion of said conduit means so that said third door means releases to an open position upon occurrence of excesive pressure within said conduit means.
Claim 9
Dependent Claim 57 words
A refuse feeder as set forth in claim 7 including a third drive means connected to said third door means for selectively driving said third door means between open and closed positions so that said third door means may be used as an alternative to said storage hopper means for transferring waste materials to said conduit means.

References Cited (Backward Citations)

US2912941A Cited
US3064593A Cited
US3457882A Cited
US3680719A Cited
US3742875A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-02-16 1979-08-18 1980-02-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-02-16 1983-08-18 1984-02-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-02-16 1987-08-18 1988-02-17 $7700.00 Window Closed / Lapsed

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