Process for obtaining one or more air products and air separation plant

An air separation plant for obtaining one or more air products comprising:

• a rectification column system comprising a high-pressure column, a low-pressure column, a main heat exchanger, and a main air compressor,
• a line for introducing feed air that is to be supplied to the rectification column system into the main compressor wherein feed air that is to be supplied to the rectification column system is compressed to a first pressure level, and wherein the high-pressure column is operated at a second pressure level which is at least 3 bar below the first pressure level,
• a cooling device for cooling the feed air prior to being supplied to the rectification column system,
• an adsorption device for removing water and carbon dioxide from the feed air to being supplied to the rectification column system,
• a line for removing a gaseous, nitrogen-rich fluid from the high-pressure column at the second pressure level, and means for heating gaseous, nitrogen-rich fluid in the gaseous state without prior liquefaction,
• one or more passages within said main heat exchanger for heating a first partial quantity of the gaseous, nitrogen-rich fluid to a first temperature level of −150 to −100° C., a line for supplying the first partial quantity of the gaseous, nitrogen-rich fluid at the first temperature level to a booster wherein the first partial quantity of the gaseous, nitrogen-rich fluid is compressed to a third pressure level, and
• one or more further passages within said main heat exchanger for heating the first partial quantity of the gaseous, nitrogen-rich fluid, after compression to the third pressure level, to a second temperature level above the first temperature level and discharging the first partial quantity of the gaseous, nitrogen-rich fluid from the air separation plant.