Indexed by:Journal Article

Date of Publication:2022-06-30

Journal:化工进展

Issue:4

Page Number:1231-1239

ISSN:1000-6613

Abstract:A wax oil hydrocracking process unit with annual capacity of 1.5 million tons in a refinery was simulated using Aspen Plus. The unit included single segment series,cold high pressure column, and light hydrocarbon absorber vacuum tower. Based on the basic production data of wax oil hydrocracking units,Aspen Plus software was used to establish a strict mathematical model for each module in the process. By adjusting the model parameters,the simulation results and calibration data were in a good agreement. Then thermodynamic parameters of different streams were obtained from the simulation. Based on the simulation,the "bottleneck" of the heat exchanger network for the process was identified using pinch analysis.,With the premise of not changing the main equipment of the system,the tuning and simulation of the existing heat exchanger network were achieved for the energy-saving program. The effective energy analysis method was also used to evaluate the heat exchange network before and after the reformation. After the tuning,the amount of hot utility was the 25709kW that is 42.2% less than original process;the amount of cold utility was 29863kW that was 38.5% less than the original process. Overall,the transformation program would save energy 17.19kgEO/t total exergy loss of the heat exchanger network would be reduced to 8477kW from 13530kW with the total exergy loss decreased by 37.35%.

Note:新增回溯数据