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According to the historical data of hydrogen production unit in refinery, the cost model and the comprehensive energy consumption model of the unit are developed. Furthermore, Aspen Plus is used to develop the mathematical model of the process and the quantitative calculation of the key material consumption of the unit is realized from the perspective of reaction mechanism. Based on the developed model, the optimization analysis system of raw material for hydrogen production unit is developed by using Matlab GUI. The deviation between the simulation result and the actual operation value of the unit is less than ± 10%, which meets the engineering calculation requirements. The sensitivity analysis of key parameters is carried out. The impact of different raw materials on the cost of hydrogen production is calculated and analyzed. Raw material price, the ratio of hydrogen to carbon as well as theoretical hydrogen production rate are the main factors The influence of different raw materials on the comprehensive energy consumption of the unit is calculated and analyzed. The comprehensive energy consumption is relatively low when natural gas and PSA desorption gas as raw materials and relatively high when coking dry gas and FCC dry gas as raw materials. [ABSTRACT FROM AUTHOR]

Hydrogen, which is one of the necessary utilities in modern refinery, accounts for a relatively high proportion in the cost of oil refining. Saving hydrogen is an important part of daily work to improve the utilization rate of hydrogen. To begin with composition and characteristics of hydrogen system, the optimization strategies and methods were analyzed, and the technical limitations were compared. Due to the relationship between hydrogen system, fuel gas system and light hydrocarbon system, optimization methods for integration of light hydrocarbon recovery system and hydrogen system were put forward. And taking the specific application cases of optimization method for analysis and comparison, it is concluded that optimization method for integration of hydrogen system and light hydrocarbon recovery system is scientific and reasonable, and it is necessary to integrate the light hydrocarbon recovery with it when the optimization for hydrogen resources is carried out. [ABSTRACT FROM AUTHOR]