US3656722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preheating fine granular material
Assignee: ThyssenKrupp Industrial Solutions AG
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Filing: 1970-05-28
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Granted: 1972-04-18
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Expires: 1990-05-28
Abstract
Abstract A plurality of eddy chambers of the cyclone separator type are arranged in superimposed levels through which the material passes downward in series and through which the hot gases travel upward in series. Each eddy chamber in at least the uppermost level is provided with a dip pipe, and each eddy chamber in at least the lowermost level is constructed without any dip pipe.
Inventors
- 👤 Jochen Polysius
- 👤 Horst Ritzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:27
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
199 words
Apparatus for preheating fine granular material by means of hot gases, comprising a plurality of eddy chambers of the cyclone separator type, arranged in superimposed levels through which the material passes downward in series and through which the hot gases travel upward in series, each eddy chamber of the cyclone separator type having a lateral gas inlet which is located adjacent to the top of the eddy chamber and which is directed to cause the entering gas to eddy in cyclone fashion so as to separate solids from the gas by centrifugal force, and each eddy chamber also having a lower portion that tapers downward to a bottom outlet for discharging separated solids, wherein the improvement comprises a central vertical gas outlet duct at the top of each eddy chamber, the lower end of such outlet duct of each eddy chamber in at least the uppermost level being extended downward into the eddy chamber in order to improve the separation of solids, and the lower end of the gas outlet duct of each eddy chamber in at least the lowermost level terminating flush with the top of the eddy chamber in order to protect the duct from thermal deterioration.
Claim 2
Dependent Claim
199 words
Apparatus for preheating fine granular material by means of hot gases, comprising a plurality of eddy chambers of the cyclone separator type, arranged in superimposed levels through which the material passes downward in series and through which the hot gases travel upward in series, each eddy chamber of the cyclone separator type having a lateral gas inlet which is located adjacent to the top of the eddy chamber and which is directed to cause the entering gas to eddy in cyclone fashion so as to separate solids from the gas by centrifugal force, and each eddy chamber also having a lower portion that tapers downward to a bottom outlet for discharging separated solids, wherein the improvement comprises a central vertical gas outlet duct at the top of each eddy chamber, the lower end of such outlet duct of each eddy chamber in at least the uppermost level being extended downward into the eddy chamber in order to improve the separation of solids, and the lower end of the gas outlet duct of each eddy chamber in at least the lowermost level terminating flush with the top of the eddy chamber in order to protect the duct from thermal deterioration.
Claim 3
Dependent Claim
42 words
Apparatus according to claim 1 wherein the eddy chambers are arranged in at least three superimposed levels, the lower end of the central vertical gas outlet duct of each eddy chamber above the lowermost level being extended downward into the eddy chamber.
Claim 4
Dependent Claim
79 words
Apparatus according to claim 1 wherein the eddy chambers are arranged in at least three superimposed levels, the first and third levels from the bottom each comprising two eddy chambers, and the second level from the bottom comprising only one eddy chamber having two gas inlet ducts, which lead from the two eddy chambers of the first level and into each of which discharges a material supply duct leading from one of the eddy chambers of the third level.
Claim 5
Dependent Claim
85 words
Apparatus according to claim 3 wherein a fourth level from the bottom comprises two eddy chambers each of which has a gas inlet duct leading from one of the eddy chambers of the third level, the latter eddy chambers being connected to a gas inlet duct, which leads from the eddy chamber of the second level and into which discharge two material supply ducts leading from the eddy chambers of the fourth level, each of such material supply ducts being provided with a shutoff device.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |