管式液塞捕集器设计及性能测试研究

管式液塞捕集器是气液混输管线终端的重要设备，其设计参数复杂，目前国内还没有具有独立知识产权的液塞捕集器产品。为此，研究了混输管线段塞流参数变化规律，指出捕集器的液位控制系统对捕集器的工作性能有较大影响--不使用液位控制系统时，捕集器液位和压力都不稳定，影响捕集器的工作性能。而启动液位控制系统后，捕集器压力和液位都较稳定；启用液位控制系统以后，捕集器内液位在设定值附近周期性波动，受液位波动影响，捕集器内压力也出现周期性波动，液位和压力的波动周期与液体流量有关。编制了段塞流捕集器设计规则，建立了捕集器系统的优化数学模型，设计并优化了液塞捕集器的结构与尺寸。所研制的液塞捕集器经室内测试，运行状态良好，在不同的试验工况下，捕集器内部的压力、液位都比较平稳，可以较好地分离气、液两相，有效消除段塞流的影响。

Design and performance testing of finger type slug catcher

The finger type slug catcher is one of the important equipments at the terminal of the wet gas transmission pipelines. Its design parameters are so complicated that China still has not produced this product with independent intellectual property rights. Through investigation into the changing laws of the parameters of slug flow, this study points out that the liquid level controlling system of the slug catcher has great influence on its working performance, which can be shown as follows: when it runs without the liquid level controlling system, the liquid level and pressure of the slug catcher are not stable and its performance can be affected. However, when the system is started up, the liquid level of the slug catcher fluctuates periodically around the setting value. As affected by the fluctuating liquid level, its pressure also fluctuates periodically. The wave period is related to the flow rate. Then this study draws up the designing code of the slug catcher of slug flow, establishes the optimization mathematical model for the system, and also designs and optimizes the structure and size of the slug catcher. The developed slug catcher runs smoothly in lab testing and its internal pressure and liquid level are relatively stable under different working conditions. In addition, it is capable of separating the gas and liquid and eliminating the impact of slug flow preferably.