陕京天然气管网系统的节能措施  

Energy saving measures of Shaanxi-Beijing Natural Gas Pipeline System

作　　者：宋明智[1] 程凤亭[2] 

机构地区：[1]中国矿业大学(北京),北京100083 [2]华北油田公司第二采油厂地质研究所,河北霸州065703

出　　处：《油气储运》2012年第11期841-844,888,共4页Oil & Gas Storage and Transportation

摘　　要：为降低天然气物流能耗,以陕京天然气管网系统为例,针对天然气储运体系展开分析,根据天然气运输管道、压气站、分输站和储气库运行特征和能耗情况,运用能源流动热平衡、能量梯阶利用和热力学值等分析方法,结合生产中电力和天然气能耗情况,进行不同角度的节能措施研究。指出可通过余热利用,差压发电和储气库改造等进行节能,并分析了各种节能措施的可行性:天然气管网中燃气压缩机组尾气温度较高,该部分余热具有较强的回收利用潜力和价值;以管网分输站差压能为基础,进行压差、焓值和内能计算,并通过值分析原理进行换算,所得结果表明其具有较高的能源利用价值;结合相关地质条件,指出可采用燃气机组尾气,惰性气体或CO2替代天然气作为储气库垫底气,该措施可削减50%以上生产用能。该研究结果可为天然气物流企业改进生产工艺,降低能耗提供参考。To reduce energy consumption of gas in logistics,Shannxi-Beijing Natural Gas Pipeline System is taken as a case to analyze the natural gas storage and transportation systems.In accordance with operating characteristics and energy consumption conditions of natural gas pipelines,compressor stations,distribution stations and gas storages as well as electric power and natural gas energy consumption in the production,by the use of thermal equilibrium of energy flow,energy cascade utilization,thermodynamic exergy value and other analysis methods,energysaving measures are researched from different aspects.It is indicated that waste heat utilization,differential pressure power generation and gas storage transformation can be used for energy saving,and the feasibility of various energy-saving measures is analyzed.Exhaust temperature of gas compressor units in the natural gas pipeline network is higher,so the waste heat has a larger potential and value for recycling.Differential pressure,enthalpy and internal energy are calculated on the basis of differential pressure energy of pipeline network distribution stations and converted by the exergy analysis principle to indicate a higher energy use value.In accordance with relevant geological conditions,it is indicated that gas-fired unit exhaust,inert gas or CO2 can replace the natural gas as the bedding gas of the gas storage.This measure can reduce more than 50% of production energy consumption.The research results can provide a reference to the natural gas logistics enterprises to improve production processes and reduce energy consumption.

关 键 词：天然气管网 能耗 储气库 压缩机组 节能 优化运行 

分 类 号：TE974[石油与天然气工程—石油机械设备]