供热管网电预热安装无补偿敷设设计及施工要点浅析

Key Points of Design and Construction of Electric Preheating Installation of Heat Supply Network without Compensation

本文介绍了某县城供暖热源由热电联产集中供热替代原燃煤锅炉热源,有效发挥经超低排放的热电联产集中供热的经济性、环保性、能源可靠性等优势。新建零次侧供热管网自电厂换热首站接至原热源厂内新建隔压泵站,敷设长度约2*10 km,管网管径为DN 800。供热管网敷设途中穿越高速、公路、泾河某支流、排洪沟等特殊地段,根据要求提出了相应的管网敷设解决方案和顶管用保温一体化滑动支架。根据团体标准《长输供热热水管网技术标准》,计算确定了电预热安装设计温度为56℃,供热管网设计和施工整体采用电预热安装无补偿敷设和分布式光纤泄漏监测系统,可以有效保障供热管网长期安全、可靠和经济运行。

This paper introduces the replacement of coal boiler heat source by cogeneration central heating in a county,which effectively leverages the economic,environmental,and energy reliability advantages of centralized heating through ultra-low emission cogeneration.The zero side heating network is connected from heat exchange initial station of the power plant to the new pressure isolation pump station in the original heat source plant,the laying length is about 2*10 km,and the pipe network diameter is DN 800.The heating pipe network is laid through special areas such as expressway,highway,a tributary of Jinghe River,flood drainage ditch,etc.According to the requirements,the corresponding pipe network laying solution and the top pipe insulation integrated sliding bracket are put forward.According to the association standard Technical standard for long distance heating hot water pipe network,it is calculated that the design temperature of electric preheating installation is 56℃,and the whole design and construction of heating pipe network adopts electric preheating installation without compensation and distributed optical fiber leak monitoring system,which can ensure the long-term safe,reliable and economic operation of heat supply network.