中文摘要：

中国钢铁、化工等行业对工业气体需求的快速增长，极大地促进了大规模空分技术的发展。目前，中国生产的单套空分设备最大氧产量达到了120000Nm^3／h，单位能耗为0．38kWh／m^3。本文介绍了中国大规模空分技术发展水平，回顾了中国大规模空分工业的发展历史。以成熟的60000Nm^3／h空分系统为例，详细介绍了分子筛吸附器、空压机、板翅换热器、透平膨胀机和精馏塔等主要设备的技术参数。然后介绍了中国正在发展中的80000～120000Nm^3／h空分工艺和装备。最后讨论了中国大规模空分技术存在的主要问题及未来发展方向。

英文摘要：

With the rapid growth in demand for industrial gas in steel and chemical industries, there has been significant emphasis placed on the development of China＇s large-scale air separation technology. Currently, the maximum capacity of a single unit has been able to attain 120 000 Nm^3/h （oxygen）, and the specific power consumption of 0.38 kWh/m^3. This paper reviews the current state-of-the-art for large-scale cryogenic air separation systems being deployed in China. A brief introduction to the history and establishment of the large-scale cryogenic air separation industry is presented. Taking the present mainstream large-scale air separation unit operating at 60 000 Nm^3/h （oxygen） as an example, the technological parameters and features of the involved key equipment, including a molecular sieve adsorber, air compressor unit, p/ate-fin heat exchanger, turbo-expander and distillation column are described in detail. The developing 80 000-120 000 Nm^3/h air separation processes and equipment are also introduced. A summary of the existing problems and future developments of these systems in China are discussed.