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,
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.
대표청구항▼
1. A seal gas recovery method comprising: introducing a first seal gas stream to a mechanically coupled booster/expander assembly, wherein said booster/expander assembly comprises a booster, a first expander, a shaft that mechanically couples said booster and said first expander, and a first seal on
1. A seal gas recovery method comprising: introducing a first seal gas stream to a mechanically coupled booster/expander assembly, wherein said booster/expander assembly comprises a booster, a first expander, a shaft that mechanically couples said booster and said first expander, and a first seal on said first shaft;removing at least a portion of a first recoverable gas stream from said first seal, wherein said first recoverable gas stream consists of at least a portion of a process leak gas stream;introducing at least a portion of said first recoverable gas stream into the suction of a second expander. 2. The seal recovery method of claim 1, wherein said first expander is the same as said second expander. 3. The seal gas recovery method of claim 1, wherein said wherein said first recoverable gas stream consists of at least a portion of a process leak gas stream and at least a portion of a seal gas vent stream. 4. A seal gas recovery method of claim 1, further comprising: a introducing a second seal gas stream to a second expander assembly, wherein said second expander assembly comprises said second expander, a second shaft, and a second seal on said second shaft;removing at least a portion of a second recoverable gas stream from said second seal, wherein said second recoverable gas stream consists of at least a portion of a second process leak gas stream,combining at least a portion of said first recoverable gas stream and at least a portion of said second recoverable gas stream to form a third recoverable gas stream;introducing at least a portion of said third recoverable gas stream into the suction of said second expander. 5. The seal gas recovery method of claim 1, further comprising a second booster/expander assembly, wherein said second booster/expander assembly comprises a second booster, a second expander, a second shaft that mechanically couples said second booster and said second expander, and a second seal on said second shaft. 6. The seal gas recovery method of claim 1, wherein said method is used in an air separation plant. 7. The seal gas recovery method of claim 1, wherein at least a portion of said expanded third recoverable gas stream is vented to atmosphere. 8. The seal recovery method of claim 1, wherein said second expander is mechanically coupled to a brake. 9. The seal recovery method of claim 6, wherein said brake may be a generator or an oil brake. 10. The seal recovery method of claim 1, wherein said first booster and said second booster increase the pressure of different fluids. 11. The seal recovery method of claim 1, wherein said first expander and said second expander decrease the pressure of different fluids.
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이 특허에 인용된 특허 (4)
Thair J. Al-Himyary CA; Jonathan D. Carlson CA, Dry gas seal contamination prevention system.
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