高压井口天然气涡流管节流加热参数优选

Optimization of vortex tube parameters for heating throttled high pressure natural gas at wellhead

涡流管具有制热性能,因此可用涡流管替代加热炉,用于加热节流后的井口高压天然气。为了优选涡流管的最佳结构参数与操作参数,发挥涡流管加热高压井口天然气的最佳效果,利用Fluent进行了数值模拟研究,建立用于高压气井井口加热的涡流管模型,通过模拟结果与实验结果对比,验证了数学模型及模拟结果的正确性。当涡流管长度为188 mm、冷端管直径为7 mm、进口数为6、锥度为6°、进气流量为0.18 kg/s、冷流率为0.6时,达到最佳加热效果。根据气井井口温度与压力参数,确定了涡流管的串并联组合方式,并将涡流管加热与加热炉加热进行了经济性对比,结果表明涡流管加热具有优异的加热效果,经济效益显著。

The heating performance of the vortex tube enables it to replace the heating furnace to heat the throttled high pressure natural gas at the wellhead.To choose the optimal structural parameters and operating parameters of the vortex tube,and give full play to the heating effect of the vortex tube on high pressure natural gas at the wellhead,this paper uses Fluent to carry out numerical simulation research to constructa vortex tube model for heating high pressure air gas at the wellhead and verifies the mathematical model and simulation results through the comparison with the experimental results.When the length of the vortex tube is 188 mm,the diameter of the cold end tube is 7 mm,the number of inlets is 6,the taper is 6°,the intake flow is 0.18 kg/s,and the cold flow rate is 0.6,the best heating effect is achieved.Based on the wellhead temperature and pressure parameters of the gas well,the series-parallel combination mode of the vortex tube is determined,and the economic comparison between the two heating ways using the vortex tube and heating furnace respectively is carried out.The results show that the vortex tube manifests a good heating effect and has significant economic benefits.