US4663507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for reduction of fly ash carbon by microwave
Assignee: CAMRAC Co Inc A CORP OF
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Filing: 1985-03-21
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Granted: 1987-05-05
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Expires: 2005-03-21
Abstract
Abstract A method and apparatus is provided for reducing and measuring carbon content in fly ash. The invention employs microwave energy as the method of heating for inducing combustion of the carbon in a fly ash sample. Measurement of the carbon content can be accomplished in accordance with the present invention by measuring temperature differential of an excess energy absorber in the form of water before and after the fly ash is exposed to microwave radiation.
Inventors
- 👤 Douglas N. Trerice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:49
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/78; H05B6/782; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/126; F; F23; F23G; F23G5/00; F23G5/08; F23G5/085; F23J; F23J3/00; F23J3/06; G; G01; G01N; G01N22/00; G01N31/00; G01N31/12; B01J2219/00; B01J2219/08; B01J2219/12; B01J2219/1203; B01J2219/1206; B01J2219/1209; B01J2219/1221; B01J2219/1224; B01J2219/1227; B01J2219/18; B01J2219/187; F23G2204/00; F23G2204/20; F23G2204/203; F23G2209/00; F23G2209/30; Y; Y10; Y10S; Y10S106/00; Y10S106/01; Y10S264/00; Y10S264/49
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
100 words
A method of reducing carbon content in fly ash comprising, providing an elongated waveguide chamber having a porous ceramic media therein, blowing air into said chamber, providing a microwave source for directing microwave radiation into said waveguide chamber, introducing fly ash into said chamber and heating said fly ash by said microwave source to ignition, providing for the escape of combustion products, absorbing excess energy, and transporting the microwaved fly ash from the chamber using high pressure air, whereby the carbon content of said fly ash is reduced as a result of microwave heating of said fly ash to ignition.
Claim 2
Independent Claim
100 words
A method of reducing carbon content in fly ash comprising, providing an elongated waveguide chamber having a porous ceramic media therein, blowing air into said chamber, providing a microwave source for directing microwave radiation into said waveguide chamber, introducing fly ash into said chamber and heating said fly ash by said microwave source to ignition, providing for the escape of combustion products, absorbing excess energy, and transporting the microwaved fly ash from the chamber using high pressure air, whereby the carbon content of said fly ash is reduced as a result of microwave heating of said fly ash to ignition.
Claim 3
Dependent Claim
48 words
The method as set forth in claim 1, wherein said fly ash is heated to a temperature between about 470° and 600° C., whereby the carbon will absorb heat faster than other fly ash components, thereby resulting in the cracking and melting of ash combusion products containing carbon.
Claim 4
Dependent Claim
25 words
The method as set forth in claim 2 wherein said microwave source emits radiation of a frequency between about 2200 and 2500 MH z .
Claim 5
Dependent Claim
23 words
The method as set forth in claim 3 wherein said air is blown into the waveguide chamber from a low pressure air source.
Claim 6
Dependent Claim
18 words
The method as set forth in claim 4 wherein the excess energy is absorbed by a water wall.
Claim 7
Independent Claim
149 words
An apparatus for reducing carbon in fly ash comprising, an elongated chamber having a porous ceramic media therein, said chamber also having an intake conduit for receiving fly ash feed, said intake conduit having a flow control valve operatively associated therewith, said chamber also having an output conduit for discharging fly ash, said output conduit having a flow control valve operatively associated therewith, said chamber also having a flume extending from said chamber to atmosphere for escape of gases from said chamber, microwave means for directing microwave radiation into one end of said chamber, said microwave means having means for heating said fly ash to ignition, excess energy absorbing means for absorbing excess microwave energy, and temperature monitoring means operatively associated with said chamber, whereby the carbon content of said fly ash may be reduced by said apparatus as a result of microwave heating said fly ash to ignition.
Claim 8
Independent Claim
149 words
An apparatus for reducing carbon in fly ash comprising, an elongated chamber having a porous ceramic media therein, said chamber also having an intake conduit for receiving fly ash feed, said intake conduit having a flow control valve operatively associated therewith, said chamber also having an output conduit for discharging fly ash, said output conduit having a flow control valve operatively associated therewith, said chamber also having a flume extending from said chamber to atmosphere for escape of gases from said chamber, microwave means for directing microwave radiation into one end of said chamber, said microwave means having means for heating said fly ash to ignition, excess energy absorbing means for absorbing excess microwave energy, and temperature monitoring means operatively associated with said chamber, whereby the carbon content of said fly ash may be reduced by said apparatus as a result of microwave heating said fly ash to ignition.
Claim 9
Dependent Claim
17 words
The apparatus as set forth in claim 6 wherein said elongated chamber is generally rectangular in shape.
Claim 10
Dependent Claim
22 words
The apparatus as set forth in claim 7 also having a low pressure air means for blowing air into said elongated chamber.
Claim 11
Dependent Claim
24 words
The apparatus as set forth in claim 8 also having an air conveyor means for transporting said fly ash to fly ash receiver means.
Claim 12
Dependent Claim
20 words
The apparatus as set forth in claim 9 wherein said temperature monitoring means has a thermocouple means operatively associated therewith.
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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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |