发明申请
- 专利标题: Process And Installation For Producing High-Pressure Nitrogen
- 专利标题(中): 生产高压氮的工艺和安装
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申请号: US12965958申请日: 2010-12-13
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公开(公告)号: US20120144861A1公开(公告)日: 2012-06-14
- 发明人: Shinji Tomita , Kouhei Nakamura , Kenji Hirose , Jerome Beauvisage , Bao Ha
- 申请人: Shinji Tomita , Kouhei Nakamura , Kenji Hirose , Jerome Beauvisage , Bao Ha
- 申请人地址: FR Paris
- 专利权人: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
- 当前专利权人: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
- 当前专利权人地址: FR Paris
- 主分类号: F25J3/00
- IPC分类号: F25J3/00
摘要:
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to produce power; a conduit for withdrawing liquid from the top of the medium pressure column, pump for pumping the withdrawn liquid to high pressure and injecting it at the top of the high pressure column; and conduit for withdrawing product nitrogen from the top of the high pressure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.