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Air e.g. low pressure low purity oxygen, separating method, involves dividing fluid issued from cryogenic distillation into two parts, and utilizing part of refrigerating capacity of turbines by cooling compressor
Air e.g. low pressure low purity oxygen, separating method, involves dividing fluid issued from cryogenic distillation into two parts, and utilizing part of refrigerating capacity of turbines by cooling compressor
The method involves deriving an oxygen rich fluid in a low pressure column (17), and sending the oxygen rich fluid to an exchange line (11). A fluid issued from a cryogenic distillation is divided into two parts, where one part of fluid is sent to a cooling turbine (47). Other part of the fluid is reheated by a reheating unit, and the reheated part of fluid is sent to a hot turbine (147), where inlet temperature of the turbine (147) is higher than an inlet temperature of the turbine (47). A part of refrigerating capacity of the turbines is used by a cooling compressor (51). An independent claim is also included for a device for separating air.
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