摘要
在长输管道输送的原油中添加降凝剂并加热到一定温度,可以降低原油的凝点和粘度,从而改善原油的低温流变性。在管输原油中添加减阻剂,则可改变管道中油流的流态,减少沿程的摩阻损失,达到节能降耗的目的。添加降凝剂综合处理技术已成功地应用于低输量管道中,取得了显著的效益。在满输管道中,由于输量大、流速高、站间热损失小,各站设计的热负荷不具备进行第二次热处理的能力,同时各泵站也没有富裕压力,这就是降凝剂应用于满输管道的技术难点。通过在秦京输油管道进行的现场试验,说明在满输管道上用降凝剂有良好的应用前景,减阻剂使加剂原油的低温流变性恶化,因而把降凝剂和减阻剂联合使用意义不大。
While adding derpressant in the crude oil to be transported through pipeline and heating the oil up to a certain temperature can reduce oil's pour point and viscosity and thus improve its low temperature rheo-logical properties, adding drag reducer can moldify flow pattern, reduce friction loss and realize the purposes of energy saving and consumption reduction. The comprehensive treatment technology for depressant addition has been successfully applied in low flow pipelines, and considerable benefits have been achieved. However, application of depressant in fully-loaded pipeline came across several technical problems due to the big flow, high flow rate, small inter-station heat loss, station desigh of thermal load insufficient for secondary heat, treatment, as well as the pump station not having extra pressure. Field tests made in Qin -Jing Oil Pipeline show that applying depressant in fully loaded pipeline is quite promising, and that combination of depressant with drag reducer, which deteriorates low - temperature rheological properties, has a limited application future.
出处
《油气储运》
CAS
北大核心
1996年第8期10-13,共4页
Oil & Gas Storage and Transportation
关键词
输油工艺
添加剂
降阻剂
降凝剂
oil transportation process, additive application, drag reducer, depressant, test
