METHOD AND DEVICE FOR AIR SEPARATION BY CRYOGENIC DISTILLING

The invention relates to a device for air separation by cryogenic distilling and a method for separating air by cryogenic distillation, wherein at least part of the air to be distilled is boosted in an air booster (C2), compressed air is allowed to expand in at least one expansion turbine (T1, T2) and, if the pressure drop between two points of the booster passes under a threshold and/or a flow ofthe booster passes under a minimum flow of the booster, part of the air boosted in the booster is allowed to expand without having been cooled between the booster and the expansion turbine and the boosted expanded air is sent upstream or downstream of the at least one turbine, without having been cooled in the heat exchanger, after having been boosted. 本发明涉及用于通过低温蒸馏来分离空气的装置。此外，本发明涉及用于通过低温蒸馏来分离空气的方法，其中使待蒸馏空气的至少部分在空气增压器(C2)中增压，允许压缩空气在至少个膨胀涡轮机(T2，T1)中膨胀，并且如果增压器的两个点之间的压降低于阈值和/或增压器的流量低于增压器的最小流量，则允许在增压器中增压的空气的部分在尚未于增压器与膨胀涡轮机之间冷却的情况下膨胀并且将增压且膨胀后的空气在已增压之后在尚未于热交换器中进行冷却的情况下送至所述至少个涡轮机的上游或下游。