关键词: 氢, 氢气网络, 中间等级, 纯化, 集中式提纯器, 优化

Abstract: The integration and optimization of hydrogen distribution network is of great significance for rational allocation of hydrogen and reduction of production costs for refineries. For the hydrogen distribution network with intermediate levels，a stepwise optimization model is proposed，in which the states of intermediate levels are determined first，and then a centralized purifier is installed. The installation strategy of the centralized purifier in the hydrogen distribution network with intermediate levels is analyzed. A case study is employed to illustrate the effectiveness of the proposed method. The results show that the proposed method can not only make the network structure scalable，but also can reduce the consumption of hydrogen utilities and save the hydrogen cost in refineries.

Key words: hydrogen, hydrogen network, intermediate level, purification, a centralized purifier, optimization