Patent US3671402A successfully refreshed from Google Patents.
US3671402A
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Fluidizing bed coking method of brown coal
Assignee: Rheinbraun AG
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Filing: 1970-04-29
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Granted: 1972-06-20
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Expires: 1990-04-29
Abstract
Abstract For the coking of brown coal, lignite or the like there is provided a coking system which includes a coking apparatus and an associated heater from which hot air is introduced into the coking apparatus. One part of the fine grained portion of the charge mixed with gases derived from the coking process is introduced from the coking apparatus into the combustion chamber of said heater to serve as fuel therefor.
Inventors
- 👤 Werner Wenzel
- 👤 Hans Penning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:05
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
64 words
A method as defined in claim 1, wherein said charge is introduced into said coking apparatus downwardly at the upper portion thereof and said hot gas is introduced into said coking apparatus upwardly through a base thereof to create a fluidized bed containing said 5-25 percent of said charge and to cause said 75-95 percent of said charge to be carried into said heater.
Claim 2
Dependent Claim
20 words
A method as defined in claim 1, wherein said hot gas has a temperature between approximately 250* C- 450* C.
Claim 3
Dependent Claim
38 words
A method as defined in claim 1, wherein the flow rate of said charge and of said hot gas is so regulated that the temperature in said coking apparatus is at a value between 600* - 900* C.
Claim 4
Dependent Claim
31 words
A method as defined in claim 1, including the step of comminuting the coal taken out with said coking gases from said coking apparatus prior to its introduction into said heater.
Claim 5
Dependent Claim
26 words
A method as defined in claim 5, wherein said comminuting step effects a reduction of the coal taken from said coking apparatus to powder size grains.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |