US4718358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for processing waste matter
Assignee: Ebara Corp
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Filing: 1986-08-08
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Granted: 1988-01-12
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Expires: 2006-08-08
Abstract
Abstract A method and an apparatus are disclosed for processing waste matter which is difficult to dispose of. The waste matter is incinerated by radiation of heat from material which exhibits microwave absorbing properties and is heated upon such absorption. The secondary gaseous waste matter produced by the incineration is burnt or pyrolysed by the presence of microwave absorbing material which is also heated by absorption of microwaves. The process according to the present invention can be practiced in an continuous operation and the volume of waste matter is remarkably reduced by the process and apparatus according to the present invention.
Inventors
- 👤 Mitsuhiko Nomi
- 👤 Junichi Yamaji
- 👤 Toyoshi Mizushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:35
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/50; H; H05; H05B; H05B6/00; H05B6/64; H05B6/80; F23G5/02; F23G5/027; F23G5/08; F23G5/085; F23G5/14; F23G5/16; F23G5/165; F23G5/24; F23G5/28; F23G7/00; F23G7/06; F23G7/061; F23G7/063; F23G7/12; G; G21; G21F; G21F9/00; G21F9/28; G21F9/30; G21F9/32; F23G2201/00; F23G2201/30; F23G2202/00; F23G2202/10; F23G2202/70; F23G2204/00; F23G2204/20; F23G2204/203; F23G2209/00; F23G2209/18; H05B2206/00; H05B2206/04; H05B2206/045
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
65 words
A method of incinerating waste matter by employing an incinerator comprising the steps of: irradiating microwaves onto a bed consisting of granules which are kept under agitation, said granules being made of material exhibiting the characteristics of good absorption of microwaves so that the granules are heated by such absorption; and continuously charging said waste matter on said layer heated by the radiation of microwaves.
Claim 2
Independent Claim
65 words
A method of incinerating waste matter by employing an incinerator comprising the steps of: irradiating microwaves onto a bed consisting of granules which are kept under agitation, said granules being made of material exhibiting the characteristics of good absorption of microwaves so that the granules are heated by such absorption; and continuously charging said waste matter on said layer heated by the radiation of microwaves.
Claim 3
Dependent Claim
41 words
A method as claimed in claim 1 wherein said waste matter falls within at least one of the following categories either independently or in a combination thereof, spent ion exchange resin (granular/powdered), spent active carbon, fibrous material and pre-coating material, etc.
Claim 4
Dependent Claim
29 words
A method as claimed in claim 1 wherein said granules are made of carbide of metallic or non-metallic material, oxide of metallic or non-metallic material or a complex thereof.
Claim 5
Dependent Claim
18 words
A method as claimed in claim 3 wherein said granules are made of silicon carbide or titanium oxide.
Claim 6
Independent Claim
52 words
A method for processing gaseous waste matter which includes a combustible constituent and/or a harmful constituent, the method comprising the steps of: heating a furnace containing microwave absorbing material by irradiating microwaves thereinto; and passing said gaseous waste matter through said furnace thereby burning said combustible constituent and/or pyrolysing said harmful constituent.
Claim 7
Independent Claim
52 words
A method for processing gaseous waste matter which includes a combustible constituent and/or a harmful constituent, the method comprising the steps of: heating a furnace containing microwave absorbing material by irradiating microwaves thereinto; and passing said gaseous waste matter through said furnace thereby burning said combustible constituent and/or pyrolysing said harmful constituent.
Claim 8
Dependent Claim
22 words
A method as claimed in claim 5 wherein said microwave absorbing material is spread as a bed of granules in said furnace.
Claim 9
Dependent Claim
21 words
A method as claimed in claim 5 wherein said microwave absorbing material is disposed as an internal wall of said furnace.
Claim 10
Dependent Claim
30 words
A method as claimed in claim 5 wherein said microwave absorbing material is a carbide of metallic or non-metallic material, oxide of metallic or non-metallic material or a complex thereof.
Claim 11
Dependent Claim
18 words
A method as claimed in claim 5 wherein said microwave absorbing material is silicon carbide or titanium oxide.
Claim 12
Independent Claim
125 words
A method of disposing of waste matter comprising the steps of: irradiating microwaves onto a bed arranged within an incinerator and consisting of granules which are kept under agitation, said granules being made of material exhibiting the characteristic of good absorption of microwaves so that the granules are heated by such absorption; irradiating microwaves onto a microwave absorbing wall of a furnace coupled to an exhaust opening of said incinerator so that the temperature of the furnace becomes high; charging said waste matter continuously into said incinerator so that it is incinerated in said furnace; and passing exhaust gas produced in said incinerator by the incineration through said furnace thereby burning combustible constituents of the exhaust gas and pyrolysing harmful constituents of the exhaust gas.
Claim 13
Independent Claim
125 words
A method of disposing of waste matter comprising the steps of: irradiating microwaves onto a bed arranged within an incinerator and consisting of granules which are kept under agitation, said granules being made of material exhibiting the characteristic of good absorption of microwaves so that the granules are heated by such absorption; irradiating microwaves onto a microwave absorbing wall of a furnace coupled to an exhaust opening of said incinerator so that the temperature of the furnace becomes high; charging said waste matter continuously into said incinerator so that it is incinerated in said furnace; and passing exhaust gas produced in said incinerator by the incineration through said furnace thereby burning combustible constituents of the exhaust gas and pyrolysing harmful constituents of the exhaust gas.
Claim 14
Independent Claim
85 words
An apparatus for incinerating waste matter comprising: an incinerator body; a feeder for continuously charging said waste matter into said incinerator body; a bed of granules made of microwave absorbing material and disposed on a hearth of said incinerator; an agitator for agitating said bed which is driven by a driver arranged below the hearth; a plurality of nozzles arranged on said hearth and coupled to an air source for supplying air into said body; and a microwave guide for introducing microwaves into said body.
Claim 15
Independent Claim
85 words
An apparatus for incinerating waste matter comprising: an incinerator body; a feeder for continuously charging said waste matter into said incinerator body; a bed of granules made of microwave absorbing material and disposed on a hearth of said incinerator; an agitator for agitating said bed which is driven by a driver arranged below the hearth; a plurality of nozzles arranged on said hearth and coupled to an air source for supplying air into said body; and a microwave guide for introducing microwaves into said body.
Claim 16
Dependent Claim
17 words
An apparatus as claimed in claim 11 wherein said nozzles comprise a plurality of porous ceramic pads.
Claim 17
Independent Claim
51 words
An apparatus for processing gaseous waste matter comprising: a furnace body having an inlet opening at the bottom and an exhaust opening at the upper portion thereof; a non-fusible microwave absorbing material disposed within said furnace body; and a microwave guide coupled with said body for introducing microwaves into said body.
Claim 18
Independent Claim
51 words
An apparatus for processing gaseous waste matter comprising: a furnace body having an inlet opening at the bottom and an exhaust opening at the upper portion thereof; a non-fusible microwave absorbing material disposed within said furnace body; and a microwave guide coupled with said body for introducing microwaves into said body.
Claim 19
Dependent Claim
31 words
An apparatus as claimed in claim 13 wherein said microwave absorbing material is a layer of granules, pieces of plate or lumps disposed at the lower portion of said furnace body.
Claim 20
Dependent Claim
28 words
An apparatus as claimed in claim 13 wherein said microwave absorbing material is disposed as an inner side wall and a perforated bottom plate of said furnace body.
Claim 21
Dependent Claim
59 words
An apparatus as claimed in claim 13 wherein the inside of said furnace body is divided into a high temperature furnace chamber and an upper chamber communicating with said high temperature furnace chamber, said microwave absorbing material being disposed in said high temperature furnace chamber, and said wave guide and said exhaust opening being communicated with said upper chamber.
Claim 22
Dependent Claim
30 words
An apparatus as claimed in claim 16 wherein said microwave absorbing material is disposed as an internal side wall and a perforated bottom plate in said high temperature furnace chamber.
Claim 23
Dependent Claim
30 words
An apparatus as claimed in claim 17 wherein a perforated plate made of a material permeable to microwaves is disposed between said upper chamber and said high temperature furnace chamber.
Claim 24
Dependent Claim
31 words
An apparatus as claimed in claim 17 wherein an upper portion of the side wall of said high temperature furnace chamber is covered by metal plate so as to reflect microwaves.
Claim 25
Dependent Claim
17 words
An apparatus as claimed in claim 18 wherein said upper chamber is given a downwardly enlarging taper.
Claim 26
Independent Claim
143 words
An apparatus for processing waste matter comprising: an incinerator body having an exhaust opening; a feeder for continuously charging said waste matter into said incinerator body; a bed of granules made of microwave absorbing material and disposed on a hearth of said incinerator; an agitator for agitating said bed which is driven by a driver arranged below the hearth; a plurality of nozzles disposed on said hearth and coupled to an air source for supplying air into said body; a microwave guide for introducing microwaves into said body; a furnace body having an inlet opening at the bottom and an exhaust opening at the upper portion thereof, said inlet opening being coupled with said exhaust opening of said incinerator body; microwave absorbing material disposed within said furnace body; and a microwave guide coupled with said body for introducing microwaves into said furnace body.
Claim 27
Independent Claim
143 words
An apparatus for processing waste matter comprising: an incinerator body having an exhaust opening; a feeder for continuously charging said waste matter into said incinerator body; a bed of granules made of microwave absorbing material and disposed on a hearth of said incinerator; an agitator for agitating said bed which is driven by a driver arranged below the hearth; a plurality of nozzles disposed on said hearth and coupled to an air source for supplying air into said body; a microwave guide for introducing microwaves into said body; a furnace body having an inlet opening at the bottom and an exhaust opening at the upper portion thereof, said inlet opening being coupled with said exhaust opening of said incinerator body; microwave absorbing material disposed within said furnace body; and a microwave guide coupled with said body for introducing microwaves into said furnace body.
Claim 28
Dependent Claim
35 words
An apparatus as claimed in claim 21 wherein said microwave absorbing material disposed within said furnace is a layer of granules, pieces of plate or lumps disposed at the lower portion of said furnace body.
Claim 29
Dependent Claim
28 words
An apparatus as claimed in claim 21 wherein said microwave absorbing material is disposed as an inner side wall and a perforated bottom plate of said furnace body.
Claim 30
Dependent Claim
17 words
An apparatus as claimed in claim 19 wherein said upper chamber is given a downwardly enlarging taper.
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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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |