US4359006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of extracting heat from manure sewage mud and other wet waste by combustion
Assignee: Individual
•
Filing: 1980-03-24
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Granted: 1982-11-16
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Expires: 2000-03-24
Abstract
Abstract Wet waste (1) is dried in a drier (3) by a blowing through of the flue gas (7) from the combustion of already dried waste and an appropriately amount of auxiliary air, and the heat from the combustion is generated by means of a scrubber (10) also cleaning the air for fume and dust particles, as well as certain nitrogen and sulphur and unpleasantly smelling compounds. Subsequently, the wash water releases the heat to a heat consumer through a heat exchanger (12), and impurities are precipitated in the clearing tank (15), while condensed water from the waste is carried away through a vent pipe (14).
Inventors
- 👤 Henrik Have
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:55
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/006; F23G; F23G5/00; F23G5/006; F23G2201/00; F23G2201/10; F23G2209/00; F23G2209/12; F23J2219/00; F23J2219/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
A method of extracting heat from manure, sewage mud, and other wet waste by combustion, said method comprising a combined drying-, combustion-, and steam-condensing-process, characterised in that up to the entire amount (7) of flue gas from the combustion of already dried waste is mixed with cold auxiliary air (8) to an appropriately low temperature and pressed through the wet waste in the drier (3) and on to a scrubber (10), wherein the wash water absorbs the heat and transfers it to the site of use, through a heat exchanger (12).
Claim 2
Independent Claim
91 words
A method of extracting heat from manure, sewage mud, and other wet waste by combustion, said method comprising a combined drying-, combustion-, and steam-condensing-process, characterised in that up to the entire amount (7) of flue gas from the combustion of already dried waste is mixed with cold auxiliary air (8) to an appropriately low temperature and pressed through the wet waste in the drier (3) and on to a scrubber (10), wherein the wash water absorbs the heat and transfers it to the site of use, through a heat exchanger (12).
Claim 3
Dependent Claim
29 words
A method as claimed in claim 1, characterised in that part (16) of the discharge air (11) of the scrubber (10) is recirculated and used as auxiliary air (8).
Claim 4
Independent Claim
30 words
A method as claimed in claims 1 or 2, characterised in that the auxiliary air (8) is preheated by passing through an air heater (17) connected as a heat consumer.
Claim 5
Dependent Claim
43 words
A method as claimed in claim 1, or 2, characterised in that the amount (8) of auxiliary air and consequently the temperature of the drying air are controlled (22) according to the temperature of the air (18) having just passed the drier (3).
Claim 6
Dependent Claim
51 words
A method as claimed in claim 1, or 2, characterised in that the generation of heat is controlled by adapting the flow (6) of combustion air to the difference in temperature between the return water (19) from the heat consumer (13) and the cooled wash water (20) from the heat exchanger.
Claim 7
Dependent Claim
59 words
A method as claimed in claim 1, or 2, characterised in that the flow of wash water through the scrubber (10) and the heat exchanger (12) is controlled according to the temperature of the wash water (25) having just left the scrubber (10) in such a manner that the supply-pipe temperature at the heat exchanger (12) is maintained constant.
Claim 8
Dependent Claim
29 words
A method as claimed in claim 1, characterized in that part (16) of the discharged air (11) of the scrubber (10) is recirculated and used as combustion air (6).
Claim 9
Dependent Claim
28 words
A method as claimed in claim 7 characterized in that the combustion air (6) is preheated by passing through an air heater (17) connected as a heat consumer.
References Cited (Backward Citations)
US2066418A
Cited
US2032402A
Cited
US3734036A
Cited
US4213407A
Cited
US4245570A
Cited
JPS55146316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |