Rotary kiln seal

Patent · Wed Jan 01 04:00:00 EST 1992

OSTI ID:868249

Drexler, Robert L ^[1]

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1. Idaho Falls, ID

A rotary seal used to prevent the escape of contaminates from a rotating kiln incinerator. The rotating seal combines a rotating disc plate which is attached to the rotating kiln shell and four sets of non-rotating carbon seal bars housed in a primary and secondary housing and which rub on the sides of the disc. A seal air system is used to create a positive pressure in a chamber between the primary and secondary seals to create a positive air flow into the contaminated gas chamber. The seal air system also employs an air inlet located between the secondary and tertiary seals to further insure that no contaminates pass the seal and enter the external environment and to provide makeup air for the air which flows into the contaminated gas chamber. The pressure exerted by the seal bars on the rotating disc is controlled by means of a preload spring. The seal is capable of operating in a thermally changing environment where the both radial expansion and axial movement of the rotating kiln do not result in the failure of the seal.

• Research Organization: EG & G IDAHO INC
• DOE Contract Number: AC07-76ID01570
• Assignee: United States Department of Energy (Washington, DC)
• Patent Number(s): US 5106105
• OSTI ID: 868249
• Country of Publication: United States
• Language: English

Related Subjects

/277/432/
air
air flow
air inlet
attached
axial
axial movement
bars
capable
carbon
chamber
changing
combines
contaminated
contaminated gas
contaminates
controlled
create
disc
employs
enter
environment
escape
exerted
expansion
external
external environment
failure
flow
flows
gas
gas chamber
housed
housing
incinerator
inlet
insure
kiln
located
makeup
means
movement
non-rotating
operating
pass
plate
positive
positive pressure
preload
pressure
pressure exerted
prevent
primary
provide
radial
radial expansion
result
rotary
rotary kiln
rotary seal
rotating
rotating disc
rotating kiln
rotating seal
rub
seal
seals
secondary
secondary seal
sets
shell
spring
tertiary
thermally