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Title: Rotary kiln seal

Abstract

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.

Inventors:
 [1]
  1. Idaho Falls, ID
Publication Date:
Research Org.:
EG & G IDAHO INC
OSTI Identifier:
868249
Patent Number(s):
US 5106105
Assignee:
United States Department of Energy (Washington, DC)
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
rotary; kiln; seal; prevent; escape; contaminates; rotating; incinerator; combines; disc; plate; attached; shell; sets; non-rotating; carbon; bars; housed; primary; secondary; housing; rub; air; create; positive; pressure; chamber; seals; flow; contaminated; gas; employs; inlet; located; tertiary; insure; pass; enter; external; environment; provide; makeup; flows; exerted; controlled; means; preload; spring; capable; operating; thermally; changing; radial; expansion; axial; movement; result; failure; rotary kiln; rotating kiln; axial movement; air flow; air inlet; contaminated gas; gas chamber; pressure exerted; radial expansion; rotating disc; rotary seal; external environment; positive pressure; secondary seal; rotating seal; /277/432/

Citation Formats

Drexler, Robert L. Rotary kiln seal. United States: N. p., 1992. Web.
Drexler, Robert L. Rotary kiln seal. United States.
Drexler, Robert L. Wed . "Rotary kiln seal". United States. https://www.osti.gov/servlets/purl/868249.
@article{osti_868249,
title = {Rotary kiln seal},
author = {Drexler, Robert L},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

Patent:

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