关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">超低压连续重整, 扩能改造, 炼化一体化, PX, PS-Ⅷ, 贴壁, C⁺₅ RON, 芳烃

Abstract: In order to adjust the product structure, adapt to the future development direction of the enterprise, promote the integrated development of refining and chemical industry, and ensure the supply of aromatic feedstock, a certain petrochemical enterprise plans to expand and reconstruct the existing domestic ultra-low pressure continuous reforming unit based on the overall process calculation. The processing capacity will be upgraded from the original 1.20 MMTPY to 1.50 MMTPY. This article conducts a process accounting for the expansion and reconstruction of the unit, determines the feasibility of the reconstruction, and proposes a reconstruction plan and implements it. The industrial application results show that the operation of the unit after the reconstruction is good, with a 1.0 unit increase in reaction severity, and an increase of 0.56 percentage points and 1.92 percentage points in the liquid yield of de-pentane oil and the mass fraction of aromatics, respectively. The self-sufficiency of aromatic feedstock has increased by 46.4%, achieving continuous and stable production of 68,800 tons of PX per month. The diesel-gasoline ratio of the whole plant has decreased from 1.22 to 1.09, with an average monthly efficiency increase of more than 107.43 million yuan. The product structure has been significantly improved, and the economic benefits are significant.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">continuous catalytic reforming unit, capacity expansion, refining and chemical integration, PX, PS-Ⅷ, attachment, C⁺₅ RON, aromatic hydrocarbons