The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 2012
Filed:
Dec. 29, 2008
Nathalie P. Schmitt, Houston, TX (US);
Nathalie P. Schmitt, Houston, TX (US);
Air Liquide Process & Construction, Inc., Houston, TX (US);
Abstract
A seal gas recovery method including introducing a first seal gas stream to a first mechanically coupled booster/expander assembly, where the first booster/expander assembly includes a first booster, a first expander, a first shaft that mechanically couples the first booster and the first expander, and a first seal on the first shaft. The method further includes removing at least a portion of a first recoverable gas stream from the first seal, where the first recoverable gas stream includes at least a portion of a first process leak gas stream and at least a portion of a first seal gas vent stream. The method further includes introducing a second seal gas stream to a second expander assembly, where the expander assembly includes a second expander, a second shaft, and a second seal on the second shaft. The method further includes removing at least a portion of a second recoverable gas stream from the second seal, where the second recoverable gas stream includes at least a portion of a second process leak gas stream. The method further includes combining at least a portion of the first recoverable gas stream and at least a portion of the second recoverable gas stream to form a third recoverable gas stream. The method further includes introducing at least a portion of the third recoverable gas stream into the second expander.