关键词: 流程模拟, 连续重整, 节能降耗, 换热优化

Abstract: Aspen HYSYS software was used to simulate the process of 700 kt/a continuous reforming unit in SINOPEC Luoyang Company. The ideal model which closed to the actual operation of the device was obtained. The model was used to optimize the operating parameters of the pre-hydrogenation fractionator (C101) and the heat exchange process of the reformate oil. The effects of reaction temperature on the octane number barrel of reformed gasoline, aromatics yield, hydrogen yield, and carbon deposition rate were simulated. After optimization, the content of C₅ component in the reformer feed decreased from 3.06% to 2.40%, the gas consumption of reboiler at the bottom of the C101 was reduced by 94 m³/h, the temperature of reformer depentanizer oil,supplied to aromatics extraction unit， increased from 70℃ to 95℃ by optimized heat exchange process， the 3.5 MPa steam consumption in downstream aromatics unit reduced by 2 t/h, and the fuel gas consumption of C201 reduced by 20 m³/h. Besides, two air-cooled devices at the top of C101 tower were shut down, saving 248 kW.h of electricity power. Combined with the coke burning capacity of the reformer, the suitable reaction temperature of the reformer was determined to be 520℃. Through the above optimization measures, the continuous reforming unit can increase the benefit by 13.58 million Yuan/a.

Key words: process simulation, continuous catalytic reforming, energy saving, heat transfer optimization