Objective With the goal of maximizing product yield, the main process operating parameters of the 700 kt/a reforming gasoline aromatics extraction unit were analyzed and optimized to obtain the optimal operating indicators of the unit.
Method The unit was systematically simulated using process simulation software, and the simulated values of the constructed model were highly consistent with the on-site values. Under the premise of qualified and stable product quality, guided by the maximum yield of benzene, toluene, and xylene, the constructed model was applied to analyze and optimize the main process operating parameters of key equipment in the process, such as the dehydrogenation tower, extraction distillation tower, solvent recovery tower, benzene tower, toluene tower, xylene tower, and a set of optimal operating parameters were obtained.
Result Applying this set of optimal operating parameters to actual production, the total yields of benzene, toluene, and xylene obtained were 99.18%, 99.59%, and 98.16%, respectively, which were 0.41, 0.35, and 0.34 percentage points higher than the total yields before optimization.
Conclusion The constructed model can meet the needs of production optimization and provide technical support for subsequent unit production optimization, technical transformation, and breaking through unit bottlenecks.
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