Reconstruction And Simulation Optimization Of Main Distillation Column For Heavy Oil Catalytic Cracking

Refineries in shandong 0.6 million tons/year of FCCU unit expansion renovation,The purpose of renovation is 0.8 million tons/year. The FCCU product distribution from prolific liquefied petroleum gas and gasoline into a prolific gasoline and diesel. In this paper, the 0.8 million tons/year of form a complete set of catalytic cracking unit to modify the main fractionator. Of fractionating column in the whole device does not change under the premise of the improvement of production capacity, With 0.8 million tons/year ability of catalytic cracking unit. At the same time satisfy the product mix adjustment. To achieve the transformation that refinery.Through the analysis of the original fractionator concluded that the existing problems: First, Production capacity from0.6 million tons/year and form a complete set of catalytic cracking unit into a matched with 0.8 million tons/year of catalytic cracking unit.Second, Adjust the fractionating column products division ratio.Third, Solve existing fractionating column tower kettle salt accumulating on the coking problem. These questions are the main goals in the process of the reform.For the problem in the crude distillation unit in this paper, we put forward the corresponding reform scheme:First, transform the fractionating column plate, through the simulation software structure parameter of the plate,and make the hydraulics analysis,optimize the plate structure,choose appropriate plate component and structure parameters. Second, To optimize fractionating column process operating conditions, distillation unit operation parameters were optimized by simulation software.Third, in separation tower of salt, coking problems puts forward corresponding solutions:combined with electric desalting tank series, and put forward to reduce the salt in the raw material and the effective use of scale inhibitors to reduce coking.That selected two kinds of plate into the simulation and hydraulics analysis respectively. We found that two plates can not requirement alone very well. Therefore, the mixed plate scheme is put forward, On the basis of analysis and simulation has been different combination of the right solution, Detailed simulation and calculation was carried out on the final plan. The retrofit scheme of optimization that is comparatively idealAccording to the method of modification, through software simulation, calculation and optimization.Get the best plate structure parameters and process operating conditions. The result can satisfy the demands of the refinery reconstruction.