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AssigneeLinde Aktiengesellschaft
InventorDimitri Golubev
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A method and apparatus for producing compressed nitrogen and liquid nitrogen. A separation system has a high-pressure column, a low-pressure column with a top condenser and a main condenser. Air is compressed in an air compressor, purified, cooled in a heat exchanger and introduced into the high-pressure column. A first part of the gaseous top nitrogen from the low-pressure column becomes compressed nitrogen product. A second part of the gaseous top nitrogen is condensed in the condensing space of the top condenser and vapor is drawn off as a residual gas stream. The vapor is expanded in a first expansion machine. A second compressed nitrogen stream from the top of the high-pressure column is expanded in a second expansion machine and then drawn off as compressed nitrogen product. A part of the nitrogen condensed in the top condenser is drawn off as liquid nitrogen product.
A method for producing compressed nitrogen and liquid nitrogen by cryogenic separation of air in a distillation column system having a high-pressure column, a low-pressure column, a main condenser which condenser evaporator, and a low-pressure column top condenser which is a condenser evaporator, said process comprising:
An apparatus for producing compressed nitrogen and liquid nitrogen by cryogenic separation of air, said apparatus comprising:
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