前言1978年,我国第一台低温精馏法制氮空分设备在开封诞生,经过三十多年的发展,高纯氮制取技术已经比较成熟。随着社会经济的发展,近年来,高纯氮设备的应用领域不断扩展,而且对节能降耗提出更高的要求。如何提高产 Preface In 1978, China’s first cryogenic distillation nitrogen nitrogen plant was born in Kaifeng, after thirty years of development, high purity nitrogen preparation technology has been more mature. With the development of society and economy, in recent years, the application field of high-purity nitrogen equipment has been expanding continuously, and higher requirements for saving energy and reducing consumption have been put forward. How to improve production