发明名称 |
AIR SEPARATION METHOD AND APPARATUS |
摘要 |
A method and apparatus to produce oxygen and nitrogen co-products in which a compressed a compressed and purified air stream is cooled, fully or partially condensed and then rectified in a main distillation column to form a nitrogen-rich vapor column overhead and crude liquid oxygen. A crude liquid oxygen stream is depressurized and then stripped in an auxiliary distillation column with a stripping gas to produce an oxygen-rich liquid. The nitrogen-rich vapor column overhead from the main distillation column is used to form a nitrogen product and the crude liquid oxygen is partially vaporized to produce the stripping gas, a residual oxygen-rich liquid and liquid nitrogen reflux to the main distillation column. The oxygen product is formed from the residual oxygen-rich liquid by either providing the heat exchange duty in condensing the compressed and purified air stream or by condensing nitrogen-rich vapor used in refluxing the main distillation column.
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申请公布号 |
US2013139547(A1) |
申请公布日期 |
2013.06.06 |
申请号 |
US201213674393 |
申请日期 |
2012.11.12 |
申请人 |
HOWARD HENRY EDWARD;WATT MATTHEW R.;BERGMAN, JR. THOMAS J. |
发明人 |
HOWARD HENRY EDWARD;WATT MATTHEW R.;BERGMAN, JR. THOMAS J. |
分类号 |
F25J3/04 |
主分类号 |
F25J3/04 |
代理机构 |
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地址 |
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