Simulation Optimization Of Main Fractionation Tower And Absorption Stabilization System For Heavy Oil Catalytic Cacking

In today's society,the energy issue is still the focus of all countries,and the energy share is the key of the economic development for all countries.However,with the low efficiency of energy use and the large amount of waste of resources and environmental issues,these have been attracted the attention of the society.In the refinery,the catalytic cracking unit consumes a relatively large amount of energy,which generally accounts for about one-seventh of the total energy consumption of the refinery,accounting for a relatively large proportion.Therefore,reducing the energy consumption of the catalytic cracker is of great significance to the energy conservation and emission reduction of the refinery.In this paper,the Aspen Plus chemical process simulation software is used to simulate the fractionation and absorption stability of heavy oil catalytic cracking,and optimize the absorption stability.The Aspen Plus chemical process simulation software was used to simulate the fractionation and absorption stability of the heavy oil catalytic cracking process.The BK10 physical property method was used for the fractionation,and the SRK physical property method was used for the absorption stabilization part to establish a model.For the model established for fractionation and absorption stability,the simulated values of both the device and the product were very close to the calibration values,and a reasonable model was established.This paper also optimized the absorption stability system,and analyzed the influence of the reflux ratio of the stabilizing tower,the flow rate of the supplemented absorbent,and the feed temperature of the desorption tower on the influence of the desorption tower and the stability tower load,and the effect of the product dry gas and liquefied gas quality.Through data analysis,and draw the relationship diagram to get the changes between them.According to the actual production and product quality requirements,select the appropriate reflux ratio,the flow rate of the supplemental absorbent and the temperature of the desorption tower feed.Under the requirements of product quality,the reflux ratio of the stable tower and the flow of supplementary absorbent were optimized.The reboiler load of the desorption tower was reduced by 515 kw,the load of the reboiler in the stable tower was reduced by 737 kw,and the load of the reboiler in the stable tower was reduced by 1104 kw.