关键词: 常减压装置, 减压转油线, 操作条件, 管道材质, 管嘴允许受力, 管道布置, 支架设置

Abstract: Combined with a 10 MM TPY atmospheric and vacuum distillation unit, this paper summarizes the basic points and precautions of the main equipment layout, pipeline material, stress analysis, support and hanger design of vacuum transfer line. According to the medium design conditions in the transfer line, 316L stainless steel pipes are used for small diameter pipeline of high-speed section, and carbon steel and 316L stainless steel composite pipes are used for low-speed section pipeline and large diameter pipeline of high-speed section. According to the characteristics of easy vibration of two-phase flow medium and the requirement of minimum pressure drop of process medium, the key of transfer line design is to select reasonable pipeline layout and effective support anti-vibration design. The vacuum tower, the vacuum furnace and the transfer line are placed on the same axis in this unit. The low-speed section of the transfer line is arranged in a straight line, and the high-speed section is arranged symmetrically on both sides of the low-speed section. The spring support, limit support, damping damper, support offset installation and other measures are adopted at the positions with large displacement to effectively prevent the vibration of the pipeline and ensure the long-term safe and stable operation of the unit.

Key words: atmospheric and vacuum distillation unit, vacuum transfer line, operating conditions, pipeline material, allowable stress of nozzle, pipeline layout, support setting