In actual refinery operations

change of feedstock properties and adjustment of production load often lead to change of hydrogen consumption in hydrogenation units. An optimization model was proposed for hydrogen network with fixed structure and intermediate headers

which was consisted of hydrogen supply units

hydrogen utility headers

intermediate headers

compressors

hydrogenation units

fuel system

and established interconnections. Adding an intermediate header with pressure of 1600 psi into conventional hydrogen network could eliminate one standby backup compressor for hydrogenation unit

which capital cost of the backup compressor was saved during design stage and compressor deployment was optimized. Optimization of the hydrogen system with an intermediate header yielded flowrate distribution of different streams and start-stop strategy of compressors under three scenarios of normal

high

and low production loads of hydrogenation unit

which achieved targets of operation optimization for multi-scenario hydrogen network.