US3661370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas delivery manifold and processed material discharge assembly for rotary kiln
Assignee: Allis Chalmers Corp
•
Filing: 1970-12-24
•
Granted: 1972-05-09
•
Expires: 1990-12-24
Abstract
Abstract A rotary kiln is disclosed with a rotary firing hood mounted concentrically over the material discharge end of the kiln to rotate with the kiln. A main burner assembly projects axially through a neck formed by a rear wall of the hood and a plurality of burners project radially through the kiln shell. Fuel gas conducting tubes for supplying the kiln shell burners, are mounted on the outer periphery of the kiln shell and extend axially through the hood and rear wall thereof. The fuel tubes each have portions that project radially inward along an outer surface of the hood rear wall and axially away from the rear wall to an annular fuel gas manifold box mounted close around the hood rear wall neck. The annular manifold box has a pair of axially spaced radial walls connected to rotate with the rotary hood and a nonrotating outer sleeve connected to a stationary fuel gas delivery conduit. An annular air manifold box, similar in construction to the fuel gas manifold box, is mounted close around the axially extending portions of the fuel tubes and between the fuel gas manifold box and the rear wall of the firing hood. Air conducting tubes mounted on the kiln shell also extend axially through the rotary hood and rear wall thereof and have portions which project radially inward and axially away from the rear wall to the annular air manifold box. The kiln is provided with a pair of radial discharge ports, circumferentially spaced 180* apart, for discharging processed material twice each revolution of the kiln. The air and fuel gas tubes are arranged along the kiln shell in two groups, with each group of tubes being on one side of the kiln and between the pair of kiln discharge ports to be spaced away from hot processed material discharged through the ports.
Inventors
- 👤 Eugene F Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:13
CPC Classifications
F; F27; F27B; F27B7/00; C; C10; C10J; C10J3/00; C10J3/005; C10J3/02; C10J3/20; C10J3/72; C10J3/74; F27B7/08; C10J2200/00; C10J2200/15; C10J2300/00; C10J2300/09; C10J2300/0953; C10J2300/0956
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
323 words
An apparatus comprising: a. a cylindrical rotary kiln shell having a plurality of kiln shell mounted burners each projecting radially inward through the kiln shell, and the kiln shell having a radial discharge port through the shell thereof adjacent one end of the kiln shell for discharging processed material from the kiln shell; b. a rotary firing hood mounted concentrically about the end of the kiln shell and connected thereto to rotate with the kiln shell about a central axis through the kiln shell, with the rotary firing hood having a rear wall closing the adjacent end of the kiln shell; c. a first annular gas manifold box concentric to the central axis and axially spaced away from the kiln shell and hood rear wall adapted for connecting a stationary gas source to the plurality of kiln shell mounted burners, and said annular box having an outer circumference of a diameter smaller than the diameter of the kiln shell; and d. a first plurality of gas conducting tubes each having a first section mounted on the outer periphery of the kiln shell with each said tube first section connected on one end to at least one of said kiln shell mounted burners and each of the first sections being parallel to thE central axis and circumferentially spaced away from the radial discharge port in the rotary kiln shell, with the first section of each tube extending through the rotary hood and rear wall thereof, and each tube having a second section projecting radially inward along the outer surface of the rear wall and a third section projecting axially away from the rear wall into connection with the annular gas manifold box for conducting gas from the annular gas manifold box into the gas conducting tubes to the shell mounted burners, and with the gas conducting tubes spaced away from exposure to processed material discharged from the kiln shell through the radial discharge port.
Claim 2
Independent Claim
323 words
An apparatus comprising: a. a cylindrical rotary kiln shell having a plurality of kiln shell mounted burners each projecting radially inward through the kiln shell, and the kiln shell having a radial discharge port through the shell thereof adjacent one end of the kiln shell for discharging processed material from the kiln shell; b. a rotary firing hood mounted concentrically about the end of the kiln shell and connected thereto to rotate with the kiln shell about a central axis through the kiln shell, with the rotary firing hood having a rear wall closing the adjacent end of the kiln shell; c. a first annular gas manifold box concentric to the central axis and axially spaced away from the kiln shell and hood rear wall adapted for connecting a stationary gas source to the plurality of kiln shell mounted burners, and said annular box having an outer circumference of a diameter smaller than the diameter of the kiln shell; and d. a first plurality of gas conducting tubes each having a first section mounted on the outer periphery of the kiln shell with each said tube first section connected on one end to at least one of said kiln shell mounted burners and each of the first sections being parallel to thE central axis and circumferentially spaced away from the radial discharge port in the rotary kiln shell, with the first section of each tube extending through the rotary hood and rear wall thereof, and each tube having a second section projecting radially inward along the outer surface of the rear wall and a third section projecting axially away from the rear wall into connection with the annular gas manifold box for conducting gas from the annular gas manifold box into the gas conducting tubes to the shell mounted burners, and with the gas conducting tubes spaced away from exposure to processed material discharged from the kiln shell through the radial discharge port.
Claim 3
Dependent Claim
57 words
An apparatus according to claim 1 having a stationary hood encircling the outer circumference of the rotary hood and defining a downward discharge passage through which processed material from the rotary kiln shell is discharged upon rotation of the kiln shell to bring the kiln shell radial discharge port in registry with the stationary hood discharge passage.
Claim 4
Dependent Claim
207 words
An apparatus according to claim 1 having a second annular gas manifold box with an outer diameter smaller than the diameter of the kiln shell but larger than the outer diameter of the first annular box, said second annular box being between the first gas manifold box and the rear wall of the rotary hood, concentric about the central axis and with an inner periphery radially outward of the third sections of the first plurality of gas tubes, and a second plurality of gas conducting tubes each having a first section mounted on the periphery of the kiln shell with each said tube first section connected on one end to at least one of the kiln shell mounted burners and each of the tube first sections being parallel to the central axis and circumferentially spaced away from the discharge port in the rotary kiln shell, with the first section of each tube of the second plurality extending through the rotary hood and rear wall thereof, and each tube of the second plurality having a second section projecting radially inward along the outer surface of the rear wall and a third section projecting axially away from the rear wall into connection with the second annular gas manifold box.
Claim 5
Dependent Claim
52 words
An apparatus according to claim 3 having a main burner concentric to the central axis of the kiln and projecting through a central opening defined by the first and second annular gas manifold boxes, through the rear wall of the rotary hood, and into the adjacent end of the rotary kiln shell.
Claim 6
Dependent Claim
63 words
In an apparatus according to claim 1, the rotary kiln shell having a pair of radial discharge ports circumferentially spaced 180* apart, and the first sections of the gas conducting tubes being circumferentially arranged in two groups with both groups arranged circumferentially spaced from both discharge ports, to discharge processed material between the groups of tubes twice each revolution of the rotary kiln.
Claim 7
Dependent Claim
37 words
In an apparatus according to claim 3, the tubes of the first and second pluralities thereof being arranged with each tube of the first plurality being circumferentially located between a pair of tubes of the second plurality.
Claim 8
Dependent Claim
109 words
In an apparatus according to claim 1, the first annular gas manifold box having a first portion comprising a cylindrical sleeve with a port adapted to be connected to a stationary gas source, and the first annular gas manifold box having a second portion comprising an annular channel defined by a cylindrical collar with a pair of axially spaced radially extending annular walls, the cylindrical sleeve being arranged to engage the outer periphery of the annular walls to enclose the annular channel of the said first annular gas manifold box and the third section of each gas conducting tube being connected to the annular channel for receiving gas there-from.
Claim 9
Dependent Claim
143 words
In an apparatus according to claim 3, each annular gas manifold box having a first portion comprising a cylindrical sleeve with a port adapted to be connected to a stationary gas source, and each annular gas manifold box having a second portion comprising an annular channel defined by a cylindrical collar with a pair of axially spaced radially extending annular walls, the cylindrical sleeve of each said box being arranged to engage the outer periphery of the annular walls of each said box to enclose the annular channel of each said annular gas manifold box, and the third section of each tube of the first plurality of tubes being connected to the annular channel of the first manifold box and the third section of each tube of the second plurality of tubes being connected to the annular channel of the second manifold box.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |