MTO联合装置急冷塔管道及其大型拉杆补偿器黏滞性阻尼减振技术研究

新疆某大型煤化工企业的68万t/a煤制烯烃项目于2016年建成，其中甲醇制烯烃（MTO）联合装置中甲醇-反应气进急冷塔的DN1800管道及大型拉杆横向补偿器存在剧烈振动问题，由于振动过大无法开车，安装普通液压阻尼器等设备后，问题依然存在。通过对管线结构特点、介质参数、拉杆补偿器特性等的分析，运用有限元软件对该管线进行模态、热位移计算及阻尼减振模拟计算，提出了进塔管线振动抑制控制的解决方案。在不更改管线结构的情况下，在管线的适当位置安装适当数量的黏滞阻尼器，有效降低了DN1800大型管线的振动，保障了生产安全并成功开车，为特大型管线减振提供了工程经验。

A viscous damping technique to control the vibration of a quench tower pipe and large rod compensator in a combined methanol to olefins (MTO) device

A 680,000 tons/a coal-to-olefins project in a coal chemical company in Xinjiang was completed in 2016. The DN1800 entrance pipeline that transports methanol vapor and the transverse large rod compensator of the quench tower of the methanol to olefins combined device suffer severe vibration problems, such that the device cannot be operated. By analyzing the pipeline structure characteristics, medium parameters and rod compensator characteristics, combined with simulating the modal, thermal displacement and vibration attenuation of the pipeline using FEA software, a solution to the feed pipeline vibration control has been proposed. Without changing the pipeline structure, by installing the proper number of viscous dampers in the appropriate positions in the pipeline, the vibration of the pipeline has been significantly reduced. The production was subsequently started successfully and production safety has been ensured.