高含硫天然气引射增压的数值模拟及硫析出分析

针对普光气田高含硫且井口压力不断降低的特点，提出了使用喷射器来将低压天然气增压输送的方案。高含硫天然气在引射增压过程中由于温度压力的变化，在喷射器内可能出现硫析出，单质硫的沉积会造成堵塞，还会加剧设备的腐蚀。建立了高含硫天然气引射增压数学模型，数值模拟了喷射器中天然气的压力、温度、速度分布特征。分析了引射系数的影响因素及引射增压过程中的硫析出的可能性.研究发现温度对喷射器内硫析出有重要的影响，所以可以提高工作流体入口温度来提高喷射器内的整体温度，从而减少硫的析出。

Numerical simulation and sulfur release analysis of ejectionsupercharging of high sulfur containing natural gas

In order to increase the wellhead pressure in Puguang gas field that had high sulfur containing natural gas, a plan of using natural gas ejector to improve the pressure of low-pressure natural gas formation then transport was expressed. Due to the change of temperature and pressure in the process of ejection supercharging, high sulfur containing natural gas may produce sulfur release in ejector, the deposition of elemental sulfur can cause clogging and increase the corrosion of equipment. In this paper, a mathematical model for ejection supercharging of high sulfur containing natural gas was established to study the pressure, temperature and velocity distribution characteristics of natural gas in the ejector. The factors affecting the entrainment ratio were studied, and the possibility of sulfur release in the process of ejection supercharging was analyzed. The result shows that sulfur release occurs in the ejector under the design condition. The analysis results can provide guidance for ejection supercharging technology of high sulfur containing natural gas field.