输油管道MI电伴热优化设计与应用

Optimal design and application of MI electrical heat tracing in oil pipeline

在较低的温度时黏性油品的黏度较高,常温管道输送此类油品较困难,因此应对其进行伴热输送。为了解决管道黏油输送的难题,在对比矿物绝缘加热电缆法(Mineral Insulated Heating Cables,MI)、集肤效应电伴热及电热带法等现有输油管道电伴热方法的基础上,重点介绍了输油管道矿物绝缘加热电缆电伴热的组成和原理,对该技术伴热量及温控电路进行了优化设计,实现了输油管道的等温伴热输送。将该等温MI电伴热技术应用于青海唐古拉山老温泉输油管道伴热的实际工程中,结果表明:该技术具有能耗低、效率高及安全可靠等优点,易于在各类黏性油品管道输送中推广应用。

It is difficult to transport viscous oil in normal-temperature pipelines because its viscosity is higher at lower temperature. Therefore, it is necessary to apply the electrical heat tracing techniques in those oil pipelines. In this paper, comparative analysis is conducted on existing electrical heat tracing methods including mineral insulated heating cables （MI）, skin-effect electrical heat tracing and electrical heating cables, with the focus on MI electrical heat tracing. Optimal design is performed on MI heat tracing volume and temperature control circuit after its compositions and principles are studied, so as to realize isothermal heat tracing transportation of oil pipelines. Isothermal MI technology is practically applied to heat tracing for Laowenquan Oil Pipeline in Tanggula Mountains. It is indicated that the＇isothermal MI technology can be easily applied to oil pipelines of various viscosities due to its features of lower power consumption, high efficiency, safety and reliability. （3 Figures, 11 References）