Dynamic Control Design and Simulation of Biogas Pressurized Water Scrubbing Process

For the process of biogas pressurized water scrubbing, design and simulation of plant-level dynamic control system is researched based on the optimum structure and parameters of the steady state in this paper. According to the process requirements of the biogas pressurized water scrubbing pilot-scale plant, a steady state simulation system is established using Aspen Plus. The simulation research under different operation conditions is carried out to obtain the optimal operating parameters. Then plant-level dynamic control schemes and the dynamic simulation system are also designed to ensure the efficiency of biogas purification. The system's performance is tested under introducing biogas inlet flow disturbance and intake flow component disturbance. The simulation results show that the system has good dynamic response performance, such as the removal rate of CO2 is greater than 99.8% under various disturbances.