关键词: 氢气网络, 过程系统, 优化设计, 集成, 多周期, 加氢精制

Abstract:

The current environmental regulations are increasingly stringent,prompting refineries to deepen the hydrogenation process to enhance product quality. However, this will significantly increase hydrogen consumption. Moreover, when adjustments in the hydrogenation unit's processing capacity and impurity fluctuations due to crude oil switching occur, it leads to deviations in the operation of the hydrogenation unit. Failing to promptly optimize hydrogen usage during this period may result in decreased product quality or lead to wastage of hydrogen. To ensure product quality compliance, reduce hydrogen consumption, and lower production costs, this paper proposed a multi-period hydrogen network integration method coupled with hydrogenation unit optimization. The method first obtained the optimal operational parameters for each unit across various scenarios using an optimization model. Subsequently, multiple optimized operational scenarios were integrated into the hydrogen network. The proposed method was applied to a case study taken from a real refinery. The results showed that the hydrogen network operating strategy obtained from the proposed method can meet the hydrogenation requirements of hydrogenation units under various scenarios and enable the production of qualified products at lower costs.

Key words: hydrogen network, process system, optimal design, integration, multi-period, hydrotreating process