US3653644A
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: 1972-04-04
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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 is provided with a duct for discharging material separated in the chamber. The material discharge duct of each eddy chamber in at least the uppermost level is provided with a shutoff valve, and the material discharge duct of each eddy chamber in at least the lowermost level is constructed without any shutoff valve.
Inventors
- 👤 Jochen Polysius
- 👤 Horst Ritzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:36
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 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 being provided with a bottom discharge duct for discharging material separated in the chamber, the discharge duct of each eddy chamber in at least the uppermost level being provided with means for shutting off the flow of material through the duct, and the discharge duct of each eddy chamber in at least the lowermost level being constructed without any means for shutting off the flow of material through the duct, and being constantly open for simultaneous downward flow of material and upward flow of a portion of the hot gases entering the eddy chamber.
Claim 2
Dependent Claim
141 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 being provided with a bottom discharge duct for discharging material separated in the chamber, the discharge duct of each eddy chamber in at least the uppermost level being provided with means for shutting off the flow of material through the duct, and the discharge duct of each eddy chamber in at least the lowermost level being constructed without any means for shutting off the flow of material through the duct, and being constantly open for simultaneous downward flow of material and upward flow of a portion of the hot gases entering the eddy chamber.
Claim 3
Dependent Claim
54 words
Apparatus according to claim 1 wherein the eddy chambers are arranged in at least three superimposed levels, the material discharge duct of each eddy chamber in the two lowermost levels being constructed without any shutoff means and the material discharge duct of each of the other eddy chambers being provided with a shutoff means.
Claim 4
Dependent Claim
70 words
Apparatus according to claim 1 wherein the open cross section of each material discharge duct that is constructed without a shutoff means is at least great enough so that not more than 80% of the cross section is occupied by the material flowing therethrough, and is at least small enough so that more than 10 percent of the gas entering the corresponding eddy chamber passes through such material discharge duct.
Claim 5
Dependent Claim
37 words
Apparatus according to claim 1 wherein each eddy chamber in at least the lowermost level is constructed without a dip pipe, and each eddy chamber in at least the uppermost level is provided with a dip pipe.
Claim 6
Dependent Claim
25 words
Apparatus according to claim 4 wherein each eddy chamber whose material discharge duct is constructed without any shutoff means is constructed without a dip pipe.
Claim 7
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 8
Dependent Claim
85 words
Apparatus according to claim 6 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 valve.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |