Dynamic Risk Simulation And Multi-objective Optimization Of Biogas-to-Oil Process

With the rapid development of the energy industry,as the application foreground biomass energy,the development and use of biogas has received more and more attention.It has become an important development direction for the industrialization of biogas by producing liquid fuel using biogas.The study of biogas-to-oil process overseas is already mature and biogas-to-oil process has put into production for many countries,especially in America.However,the technology is still at the preliminary design stage in domestic and the recognition of risks for the process is absence and lack experience.There are numerous unavoidable potential hazardous and harmful factors during the operation process because of the poisonous and harmful as well as flammable and explosive process mediums and the high temperature and pressure process conditions.Therefore,risk assessment for the process is of great significance.Based on the inherent safety,some risk reduction strategies can be implemented in the early stages of design and a multi-objective optimization is essential to be performed considering economic and risk level in order to improve the intrinsic safety and enhance economic performance.Currently,little study has been found in the open literature for biogas-to-oil process and most aimed at improving the economic benefits by analyzing and optimizing the process.But it had almost no study considering risk for the biogas-to-oil process,which may easily lead to the imbalance between inherently safety and economic benefits.For the above-mentioned reasons and the current state of biogas-to-oil research,based on the basis of the analysis and synthesis of various multi-objective optimization methods,chemical process simulation software HYSYS has been used in this paper to simulation the biogas-to-oil process and studies on the effect of the process parameter deviation in order to determine the main influencing parameters.Combined with HYSYS dynamic simulation,risk simulation is made on the process.In this way,dynamic change rules and the optimum operating conditions can be determined.Based on the HYSYS-MATLAB interface,hybrid simulation platform had been developed and used to construct HYSYS-MATLAB multi-objective optimization model framework integrated HYSYS process simulation and MATLAB optimization algorithm.Then the integrated framework was applied to the biogas-to-oil process considering inherently safety and economic benefits as the goals of multi-objective optimization to find the optimal feeding conditions for the purpose of balancing the inherently safety and economic.Finally,the layout of the biogas-to-oil process unit area had been designed and FLACS simulation was used to risk analysis to evaluate the risk and consequence of accident scenarios of the unit area layout to choose the most secure layout.By the research both on process and layout,it can be much safer for biogas-to-oil process.It showed more convincing and more realistic through the HYSYS and FLACS simulation.Furthermore,the study performance provides more guiding significance for the preliminary design of the biogas-to-oil process in the aspect of process operation and safety.