Energy-use analysis and optimization for a continuous catalytic reforming unit
The continuous catalytic reforming unit consumes a large amount of energy in upgrading of naphtha to produce high-octane reformate,benzene-toluene-xylene and liquefied petroleum gas.To identify the potential of energy savings and then propose corresponding improvements to the process are crucial for better energy-use efficiency.In this paper,energy-use analysis and optimization to a domestic continuous catalytic reforming unit are performed by using three-link energy structural model as well as energy grade-heat load(ε-Q)diagram.The results show that poor design of the heat exchanger network(HEN)and inappropriate column operation are the bottlenecks of energy-use.Low-temperature cold streams are directly preheated by the high-temperature hot streams,and the large heat transfer temperature difference between them causes large exergy destruction.Moreover,repeated heating or cooling along the stream additionally introduces unreasonable exergy destruction.By using software PRO/II,the feeding temperature,fractionating columns pressure and the feed location are optimized for operation improvement.Overall,our optimized process decreases the energy requirement by about 7%as compared to that of the original unit,which suggests that the applied strategies are beneficial to the future design and operation of continuous catalytic reforming unites.
Catalytic reforming unit Energy-use analysis Process simulation Optimization
Ting Chen Bingjian Zhang Qinglin Chen
School of Chemistry and Chemical Engineering/Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province,Sun Yat-Sen University,Guangzhou 510275,China
国际会议
桂林
英文
1-13
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）