气液分离闪蒸撬折流板分离特性试验

Separation characteristics test of corrugated plate in gas-liquid separation flash skid

摘要:

在天然气开采过程中,液态水沉积会对输气管线产生严重威胁,故气液分离设备在天然气集气系统中有着广泛应用。折流板作为气液分离闪蒸撬分液侧中重要的分离元件,为研究其分离特性,搭建了折流板分离特性研究的试验平台,针对不同型式的折流板设计了正交试验,以折流板分离效率和压降为试验指标,通过分析常温时多工况下分液侧内部构件对分离性能的影响规律,确定主要影响因素及最佳组合方案。研究结果表明,对于分离效率指标而言,选用折流板型式为水平梯形或蜂窝型、导流板结构参数为180/102/105或120/102/105、液气比为2.083‰~2.917‰、连通管状态为关闭时,分离效率较高；同时,折流板型式是影响分离效率的重要因素。对于折流板压降指标而言,选用折流板型式为蜂窝型或垂直梯形、导流板结构参数为180/102/105或120/102/105、液气比为3.750‰~4.583‰、连通管状态为关闭时,整个气液分离过程中的压降较小；同时,上述4种因素对于压降影响均不显著。

Abstract:

In the process of natural gas exploitation, liquid water deposition will seriously threaten the gas transmission pipeline. As such, the gas-liquid separation equipment is widely used in the natural gas gathering system. To investigate the separation characteristics of the corrugated plate, which is viewed as an important separation element in the liquid separation side of the gas-liquid separation flash skid, an experimental platform for exploring the separation characteristics of baffles is constructed, coupled with the orthogonal experiment designed for different types of corrugated plate. The separation efficiency and pressure drop of the corrugated plate are taken as the test indexes. The main influencing factors and the best combination scheme are determined by analyzing the influence of the internal components at the liquid separation side on the separation performance under multiple working conditions at room temperature. The results show that the separation efficiency proves to be the best when the horizontal trapezoidal or honeycomb corrugated plate, deflector structural parameters of 180/102/105 or 120/102/105, liquid gas ratio of 2.083‰~2.917‰ and closed connecting pipe are combined. The corrugated plate type is seen as a vital factor affecting the separation efficiency. The pressure drop would be the smallest in the whole gas-liquid separation process when the honeycomb or vertical trapezoid corrugated plate, the deflector structural parameters of 180/102/105 or 120/102/105, the liquid-gas ratio of 3.750‰~4.583‰ and the closed connecting pipe are integrated. The above four factors exert no significant influence on the pressure drop.