Heating – Processes of heating or heater operation – Including repairing – converting or assembling apparatus
Patent
1978-03-08
1980-03-18
Yuen, Henry C.
Heating
Processes of heating or heater operation
Including repairing, converting or assembling apparatus
432115, 34242, F27B 724
Patent
active
041937562
ABSTRACT:
A seal assembly and method for providing a contaminant-free, fluid-tight seal in a rotary kiln or similar rotating apparatus. A seal is provided between the rotating surfaces and the stationary surfaces of the kiln by providing an annular seal chamber defined by a rotating, outwardly-facing, U-shaped annular rim integral with the rotating surfaces of the rotary kiln and a stationary bellows chamber assembly integral with the stationary surfaces of the rotary kiln. An effective seal is maintained between the bellows chamber assembly and the annular rim by injecting a pressurized fluid into the bellows chamber so as to sufficiently bias its surfaces outwardly against the surfaces of the annular rim. The annular seal chamber is separated from the kiln chamber and its fluids and contaminants by an annular isolating chamber. The bellows chamber assembly prevents fluid communication between the seal chamber and the isolating chamber. The isolating chamber may communicate with the fluids of the kiln chamber via a one-way flap valve, and fluid is injected into the isolating chamber at a pressure sufficient to cause the injected fluid to flow from the isolating chamber, through the one-way valve and into the kiln chamber so as to prevent the flow of kiln fluids and contaminants into the isolating chamber.
REFERENCES:
patent: 1550591 (1925-08-01), Stone
patent: 1620989 (1927-03-01), Agthe
patent: 2760791 (1956-08-01), Neubauer et al.
patent: 2826403 (1958-03-01), Moklebust
patent: 3193266 (1965-07-01), Becker
patent: 3724887 (1973-04-01), Roberts
patent: 3923450 (1975-12-01), Inoue et al.
patent: 3940239 (1976-02-01), Rossi et al.
Tosco Corporation
Yuen Henry C.
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