Optimization and application of xylene tower based on Aspen Plus
The xylene tower,as a key equipment in the aromatics combined unit,is a separation tower with high en-ergy consumption.The xylene tower of Sinopec Hainan Refining and Chemical Company contains isomers such as para xylene,meta xylene,and ortho xylene,with similar boiling point values between components.The product purity requirements are very strict,which means that distillation separation requires high heat and high reflux ratio operations.To reduce energy consumption,this article established an Aspen Plus xylene tower model using aromat-ic hydrocarbon production data.The feasibility was verified by comparing the calculated values with the actual val-ues,and its accuracy can be applied to actual production.By utilizing constraints and optimization as well as sensi-tivity analysis in the model,while ensuring the control indicators of the top and bottom of the xylene tower,the in-fluence of changes in reflux ratio and tower pressure operating parameters on the bottom heat load and separation ef-ficiency was studied.Then,the optimal parameters were selected and the operation optimization direction was pro-vided.The results showed that reducing reflux ratio operation to reduce the bottom heat load can achieve the goal of energy conservation and consumption reduction.
ModelXylene towerEnergy conservation and consumption reductionIndustrial applications
万方数据
维普
