Process Simulation and Energy Saving Optimization of Gas Fractionation Unit

The Energy-saving optimization of the gas fractionation unit was dsicussed. Based on the PRO-II simulation software. The equilibrium stable state model and Soave-Relich-Kwong state equation were used to establish simulation models and simulate the gas fractionation unit. The simulation results were consistent with the actual operating conditions. On the basis of simulated process model, the column pressure and reflux of gas fractionation unit were analyzed by sensitivity analysis method. The critical factor affecting energy consumption of gas fractionation unit had been found. The column pressure and reflux of operation parameters were optimized by the sensitivity analysis. The optimization results were showed that under the condition of guaranteeing the quality of products, reduced the column top pressure and the reflux of the gas fractionation unit can save energy consumption 37.52%. The annual energy-saving optimization benefit was 2.64 million yuan. This method provides an effective solution for energy-saving optimization of gas fractionation units and other distillation units.