Abstract: The vacuum residue oil produced in the vacuum distillation unit of Tahe Petrochemical meets the asphalt index requirements for the production of Grade A asphalt. The main problems in current process include low and fluctuating flash point of the vacuum residue，and excessive asphantene and heavy metal contents in gas oil fraction，affecting normal production of Grade A grade asphalt. The operating data in production of atmospheric and vacuum distillation of Tahe Petrochemical were collected and investigated. The comparison of process data and product separation accuracy between simulation and calibration was carried out by establishing a process simulation model. The flash point of vacuum residue was analyzed to solve the problem of residue being unqualified asphalt feed. Moreover，hydraulics calculation of the vacuum tower was performed by using of SULPAK3.0. The structural influences on the separation accuracy of vacuum distillation were analyzed. Prospective strategies of operation optimization in the production of Grade A asphalt were proposed.

Key words: vacuum distillation, simulation, analysis, hydraulics calculation

摘要： 塔河石化减压蒸馏装置为A级沥青产品生产提供满足其指标要求的减压渣油原料。当前生产存在的主要问题是：减压渣油闪点指标偏低且波动较大；蜡油馏分中沥青质和重金属含量较高，影响了A级沥青产品的正常生产。为此，调研收集塔河石化常减压蒸馏装置的生产数据，通过建立其工艺计算模型，进行模拟计算数据与装置标定数据、液相产品分离精度的对比，分析影响减压渣油作为沥青产品原料闪点不合格等问题；并利用SULPAK3.0工具分段对减压塔进行水力学计算，分析影响减压蒸馏分离精度的塔结构问题，提出了改进措施和方案，为减压深拔操作生产A级沥青产品提供依据。

关键词: 减压蒸馏, 模拟, 分析, 水力学核算