Abstract:

In order to solve the problem of excessive vibration of the slurry circulation pipeline at vacuum tower bottom of slurry bed residue hydrogenation unit of a petrochemical enterprise, and to ensure the safe and stable operation of the equipment, a 3D model of this section of pipeline is established by combining the characteristics of the unit and the actual operating conditions of the process system. The finite element analysis software is applied to numerically simulate the pipeline, analyze the main influencing factors of the pipeline vibration, and apply viscous dampers to damp the vibration of this section of pipeline. Through the system simulation, optimization of installation plan, determination of damper installation position and reinforcement method, the theoretical simulation calculation of the final plan shows a maximum vibration reduction of 70.6% for the pipeline. After the implementation of the plan, the actual vibration value on site had a maximum reduction of 89.14%, and the actual application effect has achieved the expected results, greatly reducing the operational risk of the pipeline.

Key words: viscous dampers, slurry bed residue hydrogenation unit, vacuum tower, slurry circulation pipeline, modal analysis, vibration reduction plan

摘要：

为解决某石化企业浆态床渣油加氢装置减压塔底(减底)浆液循环线管线振动过大的问题，保障设备安全稳定运行，结合装置特点及该工艺系统实际操作工况，建立了该段管线的三维模型，应用有限元分析软件对管道整体进行了数字模拟，分析了管线振动的主要影响因素，并应用黏滞性阻尼器对该段管线进行减振。通过仿真系统模拟、优化安装方案，确定了阻尼器的安装位置及加固方式。经过模拟测算可知，采用最终方案该管线振动最大降幅70.6%,方案实施后现场实际振动值最大降幅在89.14%,实际应用效果达到预期，大大降低了该管线的运行风险。

关键词: 黏滞性阻尼器, 浆态床渣油加氢装置, 减压塔, 浆液循环管道, 模态分析, 减振方案