Air separation plant and the control device for air separation plant

摘要

Air separation unit (100), which a distillation columns system with one or more distillation columns (4), one or more air compressor (1) and a main heat exchanger (3), wherein means are provided, which are configured for this purpose, feed air in an amount of feed air through the or the air compressor (1) and to compress and the feed air is then completely or partially in the main heat exchanger (3) to cool it down and to be fed into the distillation columns system, and further wherein means are provided, which are configured for this purpose, the distillation columns system with the use of the fed into the distillation columns system of the air feed liquid air product produced in a first operating mode in a first and in a second operating mode in a second supply rate, whereby the first supply rate by more than 10 percent greater than the second supply rate, which is characterized in that the amount of feed air in the first operating mode in order to not more than 10% of the amount of feed air in the second operating mode differs.