US3871829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calciner with baffle means
Assignee: General Electric Co
•
Filing: 1972-10-20
•
Granted: 1975-03-18
•
Expires: 1992-10-20
Abstract
Abstract A method of dehalogenating a particulate composition in a calciner having a heating zone and a cooling zone is presented in which a dehalogenating atmosphere flows through the calciner, including a constricted zone in the calciner, countercurrent to the movement of the composition through the calciner. The constricted zone is formed by positioning a baffle means in the calciner and the baffle means in one embodiment is preferably positioned in the cooling zone of the calciner with a face of the baffle means being located near, and preferably approximately at, the junction of the heating zone with the cooling zone. The flow of the dehalogenating atmosphere through the constricted zone substantially minimizes diffusion into the cooling zone of the gaseous impurities removed from the particulate compounds in the heating zone. Various embodiments of a baffle means and mounting means for positioning the baffle means in a calciner are also presented.
Inventors
- 👤 W Gill Keith
- 👤 F Donald Ferris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:39
CPC Classifications
C; C01; C01G; C01G43/00; C01G43/01; C01G43/025; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
178 words
A ROTARY CALCINER COMPRISING A. A HOUSING DEFINING A CHAMBER HAVING A FEEDING ZONE, A HEATING ZONE AND A COOLING ZONE. B. HEATING MEANS FOR HEATING THE HEATING ZONE, C. FEEDING MEANS FOR INTRODUCING A COMPOSITION INTO THE CHAMBER, D. OUTLET MEANS FOR REMOVING THE TREATED COMPOSITION FROM THE CHAMBER, E. MEANS FOR CIRCULATING THE COMPOSITION AND MOVING THE COMPOSITION FROM THE FEEDING MEANS TO THE OUTLET MEANS OF THE CHAMBER, F. A GAS INLET MEANS FOR INTRODUCING AN ATMOSPHERE INTO THE CHAMBER POSITIONED SO THAT THE ATMOSPHERE MOVES COUNTERCURRENTLY TO THE MOVEMENT OF THE COMPOSITION THROUGH THE CALCINER, G. GAS OUTLET MEANS FOR REMOVAL OF THE ATMOSPHERE FROM THE CHAMBER, AND H. A BAFFLE MEANS HAVING AT LEAST ONE FACE POSITIONED IN THE HOUSING OF THE CALCINER SO THAT THE BAFFLE MEANS RESTRICTS THE PASSAGE OF THE CONTROLLED ATMOSPHERE TO A ZONE OF GREATER FLOW VELOCITY AROUND THE PERIHERY OF TH BAFFLE MEANS AND THE GASEOUS IMPURITES REMOVED FROM THE COMPOSITION IN THE HEATING ZONE ARE SUBSTANTIALLY PREVENTED FROM DIFFUSING TO THE COOLING ZONE OF THE CALCINER.
Claim 2
Dependent Claim
178 words
A ROTARY CALCINER COMPRISING A. A HOUSING DEFINING A CHAMBER HAVING A FEEDING ZONE, A HEATING ZONE AND A COOLING ZONE. B. HEATING MEANS FOR HEATING THE HEATING ZONE, C. FEEDING MEANS FOR INTRODUCING A COMPOSITION INTO THE CHAMBER, D. OUTLET MEANS FOR REMOVING THE TREATED COMPOSITION FROM THE CHAMBER, E. MEANS FOR CIRCULATING THE COMPOSITION AND MOVING THE COMPOSITION FROM THE FEEDING MEANS TO THE OUTLET MEANS OF THE CHAMBER, F. A GAS INLET MEANS FOR INTRODUCING AN ATMOSPHERE INTO THE CHAMBER POSITIONED SO THAT THE ATMOSPHERE MOVES COUNTERCURRENTLY TO THE MOVEMENT OF THE COMPOSITION THROUGH THE CALCINER, G. GAS OUTLET MEANS FOR REMOVAL OF THE ATMOSPHERE FROM THE CHAMBER, AND H. A BAFFLE MEANS HAVING AT LEAST ONE FACE POSITIONED IN THE HOUSING OF THE CALCINER SO THAT THE BAFFLE MEANS RESTRICTS THE PASSAGE OF THE CONTROLLED ATMOSPHERE TO A ZONE OF GREATER FLOW VELOCITY AROUND THE PERIHERY OF TH BAFFLE MEANS AND THE GASEOUS IMPURITES REMOVED FROM THE COMPOSITION IN THE HEATING ZONE ARE SUBSTANTIALLY PREVENTED FROM DIFFUSING TO THE COOLING ZONE OF THE CALCINER.
Claim 3
Dependent Claim
33 words
A calciner according to claim 1 in which the baffle means is in the cooling zone with one face being located at approximately the junction of the heating zone and the cooling zone.
Claim 4
Dependent Claim
24 words
A calciner according to claim 1 in which the feeding means introducing a particulate composition into the chamber is comprised of an auger means.
Claim 5
Dependent Claim
27 words
A calciner according to claim 1 in which the feeding means introducing a thickened slurry of the composition into the chamber is comprised of a pump means.
Claim 6
Dependent Claim
35 words
The calciner according to claim 1 in which the means for circulating and moving the composition to the chamber includes an assembly of a series of flights and the assembly is fastened to the housing.
Claim 7
Dependent Claim
45 words
A calciner according to claim 1 which is mounted with the outlet means for removing the composition at a point lower than the inlet means for introducing the composition so that the force of gravity aids in circulating and moving tHe composition through the chamber.
Claim 8
Dependent Claim
22 words
The calciner of claim 1 in which the baffle means is mounted on a rod which is attached to the chamber wall.
Claim 9
Dependent Claim
54 words
A calciner of claim 1 in which the face of the baffle means has at least one opening therein and at least one scoop attached to the face at the at least one opening, the scoop and opening allowing the composition to pass through the baffle means toward the outlet means of the calciner.
Claim 10
Dependent Claim
18 words
A calciner according to claim 1 in which the baffle is a cylindrical can with a flattened portion.
Claim 11
Dependent Claim
25 words
A calciner according to claim 1 in which the baffle means is attached to the means for circulating and moving the composition through the chamber.
Claim 12
Dependent Claim
50 words
A calciner according to claim 1 in which the means for circulating and moving the composition through the chamber comprises an assembly of a series of flights connected together and the series of flights are connected to a dam and the dam is connected to the housing of the calciner.
Claim 13
Dependent Claim
29 words
A calciner according to claim 11 in which the baffle means has slots on the periphery and the baffle means is positioned so that the slots receive the flights.
Claim 14
Dependent Claim
27 words
A calciner according to claim 1 in which the baffle means is a cylindrical can with an open end positioned toward the outlet means for the composition.
References Cited (Backward Citations)
US909464A
Cited
US3518062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |