摘要
以弯管系统中水合物浆液输送过程为研究对象,通过数值模拟对影响该系统中水合物颗粒最大体积分数的3个因素(入口水合物体积分数、流速和粒径尺寸)进行分析。结果表明:水合物粒径较小时,弯管系统中水合物最大体积分数与速度之间趋近于线性关系,而随着水合物颗粒粒径的增大,弯管系统中水合物的最大体积分数变化趋势趋于平缓;水合物浆流速较小时,弯管系统中水合物最大体积分数受粒径的影响较大,随着流速加快,水合物最大体积分数受粒径影响逐渐减小;增大浆液运行速度可以使得弯管系统中水合物最大体积分数会有一定的稳定性,但同时也会导致弯管外拱璧的压力增大、弯管内壁处压力急剧降低,加剧管道腐蚀,大大毁坏了管道结构。
Taking the hydrate slurry transport process in the elbow system as the research object,the three factors(inlet hydrate volume fraction,flow rate,and particle size)that affect the maximum volume fraction of hydrate particles in the system were analyzed by numerical simulation.The conclusions are as follows:when the hydrate particle with smaller size,the hydrate maximum volume fraction is in a linear relationship with the velocity.With the increasing of hydrate particle size,the change trend of the hydrate maximum volume fraction in the elbow system tends to be gentle.When slurry flow rate is small,the hydrate maximum volume fraction in the elbow system is greatly affected by the particle size.With the increase of the velocity,the effect of particle size on hydrate maximum volume fraction is gradually reduced.Increasing the velocity of the slurry allows better stability of the hydrate maximum volume fraction in the elbow system.However,it will also lead to an increase in the pressure on the outer arch of the elbow,a sharp decrease in the pressure on the inner wall of the elbow,an increase in the corrosion of the pipeline,and a great destruction of the pipeline structure.
作者
孙贤
王璐
任泽乾
SUN Xian;WANG Lu;REN Ze-qian(College of petroleum Engineering,Liaoning Shihua University,Fushun 113001,Liaoning Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2018年第10期45-50,共6页
Chemical Engineering(China)
关键词
水合物浆
弯管
安全
腐蚀
hydrate slurry
curved pipe
safety
corrosion
