Patent US4741690A successfully refreshed from Google Patents.
US4741690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for combustion or decomposition of pollutants and equipment therefor
Assignee: Megtec Systems AB
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Filing: 1985-06-19
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Granted: 1988-05-03
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Expires: 2005-06-19
Abstract
Abstract Process to ascertain combustion and/or decomposition of gaseous and/or by air or other gas carried particulate pollutants. The invention makes possible an effective and safe combustion and/or decomposition of pollutants not desired to escape into the environment. The pollutants are fed into a combustor (1) in which the pollutants are self combusted and/or are made to self decompose, whereby in the combustor outgoing gas is made to heat ingoing gas and/or by air or other gas carried particulate pollutants through counter current regenerative heat exchange. The invention also refers to an equipment for accomplishment of the process.
Inventors
- 👤 Bjorn Heed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:02
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/06; F23G7/061; F23G7/065; F23G7/066; F23G7/068
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
115 words
A process for treatment of gas, vapor, or air-borne particulant pollutants comprising the steps of: feeding the pollutant gas into a chamber having a heated bed with heat-accumulating and heat-exchanging properties, to raise the termperature of the pollutant gas to cause combustion or decomposition thereof; and reversing the direction of gas flow in the chamber to cause treated pollutant gas to raise the termperature of the incoming untreated pollutant gas comprising the step of re-routing pollutant gas from the input of the heated chamber to a storage chamber at the time of the changing of direction of gas flow, and from which storage chamber, the pollutant gas is later routed back into the heated chamber.
Claim 2
Dependent Claim
115 words
A process for treatment of gas, vapor, or air-borne particulant pollutants comprising the steps of: feeding the pollutant gas into a chamber having a heated bed with heat-accumulating and heat-exchanging properties, to raise the termperature of the pollutant gas to cause combustion or decomposition thereof; and reversing the direction of gas flow in the chamber to cause treated pollutant gas to raise the termperature of the incoming untreated pollutant gas comprising the step of re-routing pollutant gas from the input of the heated chamber to a storage chamber at the time of the changing of direction of gas flow, and from which storage chamber, the pollutant gas is later routed back into the heated chamber.
Claim 3
Dependent Claim
63 words
A process as claimed in claim 1, comprising the step of heating the central portion of the heated bed to a gas decomposition or combustion temperature, at least during the starting point of the process, by means of a heater positioned within the heated bed, whereby pollutant gas heated by the central portion of the bed will heat the exit-adjacent-portion of the bed.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 1, comprising the step of re-routing partially treated gas pollutant from exhaust discharge and into said storage chamber to avoid exhausting of untreated pollutant gas.
Claim 5
Dependent Claim
27 words
A process as claimed in claim 3, comprising the step of forcing untreated pollutant gas stored in said storage chamber back into the heated chamber for processing.
Claim 6
Dependent Claim
25 words
A process as claimed in claim 1, comprising the step of extracting by means of cooling tubes, the surplus heat generated in said heated chamber.
Claim 7
Independent Claim
84 words
An apparatus for treatment of gas, vapor, or air-borne particulant pollutants comprising: a heated chamber in the form of a bed of sand, stone, or other material having heat-accumulating and heat-exchanging properties. means for heating through an external fuel source, a central portion of said bed to a temperature that will cause combustion or decomposition of the pollutant gas passing thereover; and means for alternating the direction of pollutant gas into the heated chamber for treatment to cause gas flow in opposite, alternate directions.
Claim 8
Independent Claim
84 words
An apparatus for treatment of gas, vapor, or air-borne particulant pollutants comprising: a heated chamber in the form of a bed of sand, stone, or other material having heat-accumulating and heat-exchanging properties. means for heating through an external fuel source, a central portion of said bed to a temperature that will cause combustion or decomposition of the pollutant gas passing thereover; and means for alternating the direction of pollutant gas into the heated chamber for treatment to cause gas flow in opposite, alternate directions.
Claim 9
Dependent Claim
35 words
Apparatus as claimed in claim 6, comprising means for changing the direction of pollutant gas entry and exit from said heated chamber to cause a reverse in direction of gas flow over the heating means.
Claim 10
Dependent Claim
48 words
Apparatus as claimed in claim 6, comprising a storage means for temporarily storing gas during the change of direction procedure to avoid release from the system of uncompletely treated pollutant gas, and means for returning gas stored in the storage means back to the heated chamber for processing.
Claim 11
Dependent Claim
24 words
Apparatus as claimed in claim 6, comprising cooling tubes positioned within said heating bed to enable extraction of excess surplus heat from the system.
Claim 12
Independent Claim
79 words
An apparatus for treatment of gas, vapor, or air-borne particulant pollutants comprising: a heated chamber in the form of a bed of sand, stone, or other material having heat-accumulating and heat-exchanging properties; means for heating a central portion of said bed to a temperature that will cause combustion or decomposition of the pollutant gas passing thereover; and means for alternating the direction of pollutant gas into the heated chamber for treatment to cause gas flow in opposite, alternate directions.
Claim 13
Independent Claim
79 words
An apparatus for treatment of gas, vapor, or air-borne particulant pollutants comprising: a heated chamber in the form of a bed of sand, stone, or other material having heat-accumulating and heat-exchanging properties; means for heating a central portion of said bed to a temperature that will cause combustion or decomposition of the pollutant gas passing thereover; and means for alternating the direction of pollutant gas into the heated chamber for treatment to cause gas flow in opposite, alternate directions.
Claim 14
Dependent Claim
35 words
Apparatus as claimed in claim 10, comprising means for changing the direction of pollutant gas entry and exit from said heated chamber to cause a reverse in direction of gas flow over the heating means.
Claim 15
Dependent Claim
48 words
Apparatus as claimed in claim 10, comprising a storage means for temporarily storing gas during the change of direction procedure to avoid release from the system of uncompletely treated pollutant gas, and means for returning gas stored in the storage means back to the heated chamber for processing.
Claim 16
Dependent Claim
24 words
Apparatus as claimed in claim 10, comprising cooling tubes positioned within said heating bed to enable extraction of excess surplus heat from the system.
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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) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |