集肤效应电伴热输油管道的优化设计试验

Experimental optimum design of SECT for oil pipeline with electric heat tracing

介绍了输油管道集肤效应电伴热(SECT)系统的基本构成,即电源、电热装置、电气控制装置、绝缘装置及保温装置。为提高SECT法的伴热性能,搭建了长20 m的SECT输油管道试验台架,对SECT法的集肤效应性能、发热性能、漏电压进行系统测量,开展优化设计。结果表明:输油管道应用集肤效应电伴热技术,集肤效应明显,可极大地提高伴热效率;SECT加热管宜选用管径为1.91 cm的圆形SECT加热管,此时阻抗值较大且安装穿线方便;SCET加热管的漏电压极小,操作安全可靠。(表1,图5,参5)

This paper introduces basic structure of skin effect couple tracing （SECT） system of oil pipeline.The system is mainly composed of power source,electric heating device,electric control device,and electric/thermal insulation devices.In order to elevate tracing performance of SECT pipeline,a 20 m-long SECT oil pipeline test bench is set up for systematic measurement of skin-effect performance,heating performance and drain voltage and optimum design of SECT method.The test results show that if SECT technique is applied to oil pipelines,the skin effects will be evident,and the tracing efficiency will be enhanced significantly.Better to choose round SECT heating pipe with a diameter of 1.91 cm,because in this case the resistance is big,pipe installation and threading is convenient,drain voltage is very small,the related operations are safe and reliable.