关键词: 劣质原油, 高等级道路沥青, 质量标准, 原油选择, 分输分炼, １０℃延度

Abstract: This article introduces the situation of a company's atmospheric and vacuum distillation unit processing inferior crude oil to produce high-grade road asphalt. The company's atmospheric and vacuum distillation unit uses the method of processing Basra Medium crude oil blended with low sulfur crude oil from eastern Hebei and northern China to produce asphalt products. In order to balance the production of asphalt and the operation of the residual oil hydrogenation unit, the unit cannot process inferior crude oil, and the 10℃ ductility of asphalt products does not meet the requirements of the high-grade road asphalt standard in JTG F40—2004 Technical Specification for Highway Asphalt Pavement Construction. Optimize the production and operation of the equipment: select low-quality crude oil varieties with low wax content, high aromatic hydrocarbon and asphalt content; optimize tank area configuration and scheduling arrangements, separate transportation and refining with other crude oils, and avoid mixing unsuitable crude oils; add a fourth line extraction to the atmospheric and vacuum distillation unit to prevent wax components from mixing into asphalt, and adjust the operation of the atmospheric and vacuum distillation unit in a timely manner for asphalt production, which can achieve stable production of high-grade road asphalt. After optimizing the equipment, processing inferior mixed crude oil such as Basra Medium, the asphalt product has a 10℃ ductility greater than 50 cm and a residual 10℃ ductility of 11 cm, meeting the requirements of Class A asphalt standards. The economic benefits increased by 30.95 million yuan per month.

Key words: inferior crude oil, high-grade road asphalt, quality standard, crude oil selection, separate transmission and refining, 10℃ ductility