低输量加剂输送管道安全经济运行的基本原理  

Principle of Safe and Economic Operation of Low Capacity Pipeline with Additive.

作　　者：丁芝来[1] 梁静华[1] 赵晓东[1] 

机构地区：[1]中国石油天然气管道科学研究院

出　　处：《油气储运》1994年第3期18-22,共5页Oil & Gas Storage and Transportation

摘　　要：着重介绍了中洛复线加降凝剂输送3次现场试验,通过热力与水力计算,说明中洛复线可采用隔站点炉运行方式;根据对管道等效结蜡厚度变化规律的讨论,评述了低输量加剂输送管道结蜡规律和清蜡措施;分析了等效结蜡厚度与管道传热系数的关系,认为随着等效结蜡厚度的增加管道的传热系数将随之降低。采用加剂综合处理工艺以降低原油的凝点和粘度,保持一定的结蜡凝油层厚度以降低管道的传热系数,是实现安全经济运行的两个基本条件。在现场试验的基础上,提出了低输量加剂输送管道经济运行的基本原理,根据不同季节,采用不同的热力越站方式,达到尽可能节约燃油的目的,为中洛复线及其它低输量运行管道采用安全经济的输送方式提供了试验和理论依据。Mainly introduced three site tests of Zhong- Luo Loop Line with addition. Through thermal and hydraulic calculation, it is proved possible for the operation of this pipeline if heated every two stations. Wax deposit and removal measures are discussed based on the changing rule of equivalent wax deposit thickness (EWDT) in low flowrate pipeline with additive with correlation between EWDT and pipeline thermal conductivity coefficient. The conductivity coefficient decreases with the increase of EWDT. To adopt additive as a treating measure to lower pour point and viscosity, to keep wax deposit at a certain thichness so as to lower the thermal conductivity coefficitent, which are considered to be the two basic conditions for maintaining safe and economic operation. The writers introduce the basic principle of economic operation of low flowrate with additive based on the site tests. Different by-pass heating methods can be considered 'for different seasons so as to save as much fuel as possible, which provides experimental and theoretical basis for the safe and economic transportation adopted in Zhong-Luo and other pipelines with low flowrate.

关 键 词：低输量 油气集输 管道 安全 降凝剂 

分 类 号：TE88[石油与天然气工程—油气储运工程]