Objective The aim is to improve the qualities and yields of benzene, toluene, xylene(BTX) products and reduce the energy consumption of the unit.

Methods The PETRO-SIM process simulation software was used to simulate and calculate the reforming raw materials at different initial boiling points. Aspen software was used to simulate and optimize the operating parameters of xylene tower.

Results The ideal initial boiling point for the reforming feed was 82 ℃. By adjusting the operating conditions of the pre fractionation tower, the C₅ component mass fraction in the reforming feed decreased by 0.79 percentage points. By implementing segmented control of reforming reaction temperature, the residual amount of methylcyclopentane in the reformed oil decreased by 0.16 percentage points, and the mass fraction of C₆-C₈ aromatics increased by 2.28 percentage points. The near-infrared online analysis technology was utilized to analyze data in real-time and dynamically adjust operations, the yield of xylene increased from 22.27% to 28.50%. By using Aspen software to simulate and optimize the operating parameters of the xylene tower, the yield of isomeric grade xylene at 3 ℃ increased from 23.20% to 25.60%.

Conclusions Through production optimization, the "three increases and one decrease" efficiency goal of improving the automatic control level of the device, improving the yield and quality of aromatic products such as BTX, and reducing energy consumption has been achieved, which has reference significance for the production of aromatic products in similar devices.