极寒地区某LNG模块工厂电伴热系统设计

Design of an Electrical Heat Tracing System for a LNG Modularization Plant in the Extremely Cold Area

随着海洋石油和天然气行业的发展,电伴热系统设计也在不断完善,以满足不同的低温环境和工艺要求。位于北极圈的LNG工厂是全球首次在极寒地区的(-50,℃)天然气开发项目,电伴热系统设计所用产品涵盖了瑞侃所有产品系列,包括集肤效应电伴热产品,以满足不同工艺系统的需求。为了提高供电可靠性,设计了8种典型的配电电路供选择。设计了电伴热系统控制网络,对重要工艺系统温度进行实时监测。电伴热中间接线箱、转换开关和温度控制器采用了集中放置设计,达到了"降本增效"的目的。

With the development of offshore oil and natural gas industry,electrical heat tracing system design is also constantlyimproving to meet the demands of different low temperature environments and process requirements.The LNG plantintroduced in this paper is located in the Arctic Circle,which is the world’s first natural gas development project in the extremelycold area（-50,℃）. The products required by electrical heat tracing design cover all series of RAYCHEM products,including skin effect heat tracing products,so as to meet the different requirements of the process system.Eight typicalsupply circuits were designed for selection to raise power supply reliability.The control network of electrical heat tracingsystem is to monitor the temperature of important process system.Marshalling box,control switch and thermostat wererelocated and centralized design was adopted.The goal of reducing cost and increasing efficiency has been achieved.