Ultra-high-purity oxygen production method and ultra-high-purity oxygen production apparatus
US-2024353173-A1 · Oct 24, 2024 · US
Process and installation for producing high-pressure nitrogen
US8991209B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8991209-B2 |
| Application number | US-96595810-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 13, 2010 |
| Priority date | Dec 13, 2010 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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- Title
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Abstract
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A method and apparatus for producing high pressure nitrogen is provided. This system includes a first compressor for compressing air and cooling air to substantially the dew-point, a high pressure column, a medium pressure column, a conduit for introducing at least a portion of the compressed air at a base of the high pressure column; a conduit for removing a oxygen enriched liquid from the base of the high pressure column; a first valve for reducing the pressure of the oxygen enriched liquid to a medium pressure, where the medium pressure is between the high pressure and atmospheric pressure, a conduit for introducing the oxygen enriched liquid at an intermediate place of the medium pressure column; a second expander for reducing the pressure of at least a part of the liquid removed from the base of the medium pressure distillation column, to a low pressure to cool a top condenser of the medium pressure column and to form a waste vapor stream; a cold compressor for compressing a vapor stream removed form the medium pressure column, cooling the compressed vapor stream, and introducing it into the base of the high pressure column; a heat exchanger for heating the waste vapor stream, a first expander for expanding the heated stream to produce power; a conduit for withdrawing liquid from the top of the medium pressure column, pump for pumping the withdrawn liquid to high pressure and injecting it at the top of the high pressure column; and conduit for withdrawing product nitrogen from the top of the high pressure column.
First claim
Opening claim text (preview).
What is claimed is: 1. A process for producing high pressure nitrogen, the process comprising: cooling feed air to substantially the dew-point thereof; introducing at least a portion of said feed air at a base of a high pressure column; removing an oxygen enriched liquid from the base of said high pressure column; reducing the pressure of said oxygen enriched liquid in a first valve to a medium pressure; wherein said medium pressure is between said high pressure and atmosp…
Assignees
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Classifications
- F25J3/04412Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US8991209B2 cover?
- A method and apparatus for producing high pressure nitrogen is provided. This system includes a first compressor for compressing air and cooling air to substantially the dew-point, a high pressure column, a medium pressure column, a conduit for introducing at least a portion of the compressed air at a base of the high pressure column; a conduit for removing a oxygen enriched liquid from the bas…
- Who is the assignee on this patent?
- Tomita Shinji, Nakamura Kouhei, Hirose Kenji, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification F25J3/04412. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).