Optimization of heat exchange network for 80 000 t/a pentane process
Aspen Plus software was used to simulate the 80 000 t/a raffinate pentane hydrogenation process.The heat exchange network was optimized by heat pump distillation and pinch technology.After optimization,about 8 509 kW of energy is recovered.The heat utility is reduced by 54.9%,the cold utility is reduced by 70.6%,and the heat exchange area is reduced by 67.5%,resulting in 35.2%decrease in total investment cost.