US3592453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for drying and preheating fine-grained material, such as cement raw material particularly
Assignee: Westfalia Dinnendahl Groeppel AG
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Filing: 1969-06-13
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Granted: 1971-07-13
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Expires: 1989-06-13
Abstract
Abstract Device for drying and preheating fine-granular material includes an electrofilter, a hot gas supply duct connected to the electrofilter and formed with an advance precipitation chamber, means for supplying fine-granular material directly to the duct for precipitating a portion thereof in the chamber, bucket elevator means adjacent the chamber and the electrofilter for receiving precipitated material from both thereof and for transporting the precipitated material to a heat exchanger stage connected upstream of the duct.
Inventors
- 👤 Heinz Jager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:38
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/01; B03C3/014; F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
23 words
Device according to claim 1, wherein said heat exchanger stage is the first stage of a plurality of serially connected heat exchanger stages.
Claim 2
Dependent Claim
48 words
Device according to claim 1, including a rotary kiln connected upstream of said heat exchanger stage, and a suction blower connected downstream of said electrofilter and adapted to draw hot gas from said rotary kiln through said heat exchanger stage, said hot gas supply duct and said electrofilter.
Claim 3
Dependent Claim
119 words
Device for drying and preheating fine-granular material comprising an electrofilter, a hot gas supply duct connected to said electrofilter and formed with an advance precipitation chamber, means for supplying fine-granular material directly to said hot gas supply duct for precipitating a portion of said material in said advance precipitation chamber, bucket elevator means adapted to receive precipitated material from both said advance precipitation chamber and said electrofilter for transporting the material to a heat exchanger stage connected upstream of said hot gas supply duct, including conveyor band means substantially intersecting with said bucket elevator means and located adjacent said advance precipitation chamber and said electrofilter for receiving the precipitated material therefrom and conveying the same to said bucket elevator.
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 |