US3592149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for processing sewage
Assignee: Vereinigte Kesselwerke AG
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Filing: 1969-09-25
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Granted: 1971-07-13
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Expires: 1989-09-25
Abstract
Abstract Apparatus for drying sewage with a high liquid content comprising a flue duct for conducting hot flue gases from a combustion furnace along a predetermined path and in which at least one atomizer is arranged for injecting sewage into the hot flue gases passing through the flue duct. Baffle means are provided in the flue duct after the atomizer for mixing the hot flue gases with the sewage injected therein to thereby dry the substantially liquid sewage and simultaneously cool the hot flue gases.
Inventors
- 👤 Reinhold Mutke
- 👤 Peter Steller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:01
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/008
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
167 words
An apparatus for drying sewage having a high liquid content; comprising in combination, a source of hot flue gases; flue means having an upstream portion and downstream portion with the latter having a cross section at least equal to that of said upstream portion, said flue means conducting a stream of said hot flue gases along a predetermined path; injecting means selectively communicating with said flue means for injecting into said stream of hot flue gases sewage containing a liquid-solid mixture; and mixing means in said upstream portion of said flue means after said injecting means and progressively constricting the cross section of said upstream portion in direction towards said downstream portion so as to increase the flow speed of said stream and mixture and induce turbulence therein on entry into said downstream portion for intimately mixing the injected sewage with said stream of hot flue gases to thereby dry the liquid contents of said injected sewage and to simultaneously cool said stream of hot flue gases.
Claim 2
Independent Claim
167 words
An apparatus for drying sewage having a high liquid content; comprising in combination, a source of hot flue gases; flue means having an upstream portion and downstream portion with the latter having a cross section at least equal to that of said upstream portion, said flue means conducting a stream of said hot flue gases along a predetermined path; injecting means selectively communicating with said flue means for injecting into said stream of hot flue gases sewage containing a liquid-solid mixture; and mixing means in said upstream portion of said flue means after said injecting means and progressively constricting the cross section of said upstream portion in direction towards said downstream portion so as to increase the flow speed of said stream and mixture and induce turbulence therein on entry into said downstream portion for intimately mixing the injected sewage with said stream of hot flue gases to thereby dry the liquid contents of said injected sewage and to simultaneously cool said stream of hot flue gases.
Claim 3
Dependent Claim
87 words
An apparatus as defined in claim 1, wherein said upstream portion and downstream portion communicate with said baffle means upstream and downstream thereof, said downstream portion extending angularly relative to said upstream portion and said baffle means operative to abruptly change the direction of flow of said injected sewage between said upstream and downstream portions of said flue means to effect said turbulence and thereby said intimate mixing of said stream of hot flue gases and said injected sewage in said downstream portion of said flue means.
Claim 4
Dependent Claim
24 words
An apparatus as defined in claim 2, wherein said downstream portion of said flue means has a larger diameter than said upstream portion thereof.
Claim 5
Dependent Claim
27 words
An apparatus as defined in claim 3, wherein said downstream portion of said flue means extends at an angle of 180* relative to said upstream portion thereof.
Claim 6
Dependent Claim
54 words
An apparatus as defined in claim 4, wherein said flue means is a tubular member, and wherein said injecting means includes at least one atomizing injecting member having a nozzle portion opening in said tubular flue member for dispensing said sewage into said stream of hot flue gases passing through said tubular flue member.
Claim 7
Dependent Claim
33 words
An apparatus as defined in claim 5, wherein said injecting means includes a plurality of atomizing injecting members having their nozzle portions opEning at inner opposite wall portions of said tubular flue member.
Claim 8
Dependent Claim
40 words
An apparatus as defined in claim 5, wherein said tubular flue member has an inner polygonal circumference, and wherein said injecting means includes a plurality of atomizing injecting members arranged along said inner polygonal circumference of said tubular flue member.
Claim 9
Dependent Claim
37 words
An apparatus as defined in claim 7, wherein said plurality of atomizing injecting members have outlet orifices whose respective axes are oriented substantially tangentially with respect to the flow axis of said stream of hot flue gases.
Claim 10
Dependent Claim
56 words
An apparatus as defined in claim 8, wherein said stream of hot flue gases has an axis extending in the direction of flow of said gases, and wherein said axes of all of said outlet orifices are oriented in one and the same circumferential direction relative to said axis of said stream of hot flue gases.
Claim 11
Dependent Claim
42 words
An apparatus as defined in claim 7, wherein said inner polygonal circumference of said tubular flue member is quadrangular, and wherein each one of said plurality of atomized injecting members is located in each one of the angles of said quadrangular circumference.
Claim 12
Dependent Claim
70 words
An apparatus as defined in claim 5, wherein said injecting means includes disconnect means for selectively halting sewage-dispensing operation of said at least one atomizing injecting member, and wherein said flue means includes heat exchange means after said mixing means in said downstream portion of said flue means for cooling said stream of hot flue gases following halting of said sewage-dispensing operation of said at least one atomizing injecting member.
Claim 13
Dependent Claim
115 words
An apparatus as defined in claim 11, wherein said downstream portion of said flue means includes outlet means, a first normally open passageway normally communicating with said outlet means for the disposal of dried sewage and cooled flue gases, and a second normally closed passageway accommodating said heat exchange means and operative to communicate with said outlet means for the disposal of flue gases cooled by said heat exchange means, said first and second passageways extending substantially parallel relative to each other and having valve means for selectively closing said first normally open passageway and opening said second normally closed passageway in response to halting of said sewage dispensing operation of said atomizing injecting member.
Claim 14
Dependent Claim
91 words
An apparatus as defined in claim 1, wherein said source of hot flue gases is a combustion furnace, and wherein said flue means is a duct member having an inlet and an outlet, said inlet having said upstream and downstream portion, said upstream portion communicating with and receiving combusting flue gases from said combustion furnace and said downstream portion communicating with said upstream portion for receiving from the latter combusted flue gases, and wherein said injecting means is located in said downstream portion of said inlet upstream of said mixing means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |