Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
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F25J
LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
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3/00
Processes or apparatus for separating the constituents of gaseous; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
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F25J3/02
by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
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F25J3/04151
Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
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F25J3/04187
Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
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F25J3/04187

AIR SEPARATION UNIT
20260092735 · 2026-04-02 ·

To provide an air separation unit capable of reducing the risk of combustion of a heat exchanger connected to an oxygen turbine. An air separation unit A1 including a main heat exchanger 1; an intermediate-pressure rectification column 2; a low-pressure rectification column 4; a crude-argon column 5; a nitrogen condenser 3; a crude-argon condenser 6; an oxygen turbine 9; an oxygen turbine inlet pipe L32 for feeding oxygen gas drawn out from a bottom section of the low-pressure rectification column 4 or a gas phase in a refrigerant storage section of the nitrogen condenser 3 into the oxygen turbine 9 via the main heat exchanger 1, and feeding the oxygen gas to the main heat exchanger 1 again; an oxygen bypass pipe L321 which branches from the oxygen turbine inlet pipe L32; and a dilution stream pipe L42 for drawing out a nitrogen-containing gas.