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1工程概况秦皇岛市热力总公司继2000年一期供热工程完成供热面积533×10~4 m~2 后,市区尚有1 201×10~4 m~2未实现集中供热。在2007年二期供热工程中,以秦皇岛热电厂2台300 MW热电机组经汽一水换热生产的高温热水,由热电厂引出南北两条主干线。南主干线长15.05 km,最大规格为φ1 220×12;北主干线长10.67km,最大规格为φ1 020×10。供、回水温度为120、70 ℃。热电厂出口直径为1.2 m的大口径流量计拟选用
1 Project Overview After the completion of heating area of 533 × 10 ~ 4 m ~ 2 in 2000, the Thermal Power Company of Qinhuangdao City still has 1 201 × 10 ~ 4 m ~ 2 unheated central heating in urban area. In the second phase of 2007 heat supply project, two 300 MW thermoelectric units of Qinhuangdao Thermal Power Plant were heated by high-temperature hot water produced by steam-water heat exchange, and two main north-south lines were led out by thermal power plant. The southern main line is 15.05 km long and the largest one is φ1 220 × 12. The north main trunk line is 10.67 km long and the largest one is φ1 020 × 10. Supply and return water temperature is 120,70 ℃. Thermal power plant exit diameter of 1.2 m large-diameter flow meter to be used