油田联合站分布式能源系统能流分析及其分配优化  

Energy flow analysis and distribution optimization of distributed energy system for a multi-purpose station of oilfield

作　　者：牛栓文[1] 高国强[1] 李清方[1] 李凤名 王照亮[2] NIU Shuanwen;GAO Guoqiang;LI Qingfang;LI Fengming;WANG Zhaoliang(SINOPEC Shengli Oilfield Company;College of New Energy,China University of Petroleum(East China))

机构地区：[1]中石化胜利油田分公司 [2]中国石油大学(华东)新能源学院

出　　处：《油气储运》2023年第3期352-360,共9页Oil & Gas Storage and Transportation

基　　金：中石化科技攻关项目“油田生产系统能流分析优化及应用技术研究”,P20070-8。

摘　　要：为实现油田联合站天然气的梯级利用,提高油田污水余热回收利用,针对胜利油田集输系统某联合站污水余热利用率低与能量不可逆损失大两方面的问题,提出采用天然气发电、烟气和污水余热利用相结合的用能模式,建立了基于天然气发电余热利用的联合站分布式能源系统。建立燃气内燃机能流模型,改变内燃机发电功率与原油出口温度进行热力模拟,采用系统效率法分析其对供热量及热泵性能指数的影响,确定合适的运行参数;基于烟气补燃式第一类吸收式热泵能流模型,采用夹点分析法对整个分布式能源系统进行能流分析,确定系统用能薄弱点并对其进行优化,最终通过分析对优化效果进行评价,验证夹点技术进行能流分析优化的合理性。结果表明:优化改造后的联合站分布式能源系统夹点温差的合理范围为10~12 K,节能潜力为29.2%。研究成果可为联合站节能降耗、实现能源利用效能最大化提供理论指导。In order to realize the cascade utilization of natural gas in the multi-purpose station of oilfield and improve the recovery of waste heat from the oilfield wastewater,an energy consumption model that combines natural gas power generation and the waste heat recovery of flue gas and wastewater was proposed for the problems of low waste heat recovery of the wastewater in a multipurpose station and the rreversible energy loss in the gas gathering system of Shengli Oilfield.Meanwhile,a distributed energy system was built for the multi-purpose station based on waste heat recovery of natural gas power generation.Besides,an energy flow model of a gas internal combustion engine was established.With the model,the thermodynamic simulation was carried out by changing the generation power of internal combustion engine and the outlet temperature of crude oil,and its influence on heat supply and heat pump COP was analyzed with the system efficiency method,to determinethe appropriate operating parameters of the internal combustion engine.Further,energy flow analysis was carried out for the whole distributed energy system with the pinch analysis method based on the energy flow model of class-I absorption heat pump for secondary combustion of flue gas.On this basis,the weak points of system energy consumption were determined and optimized.Finally,the optimization results were evaluated through exergy analysis,and the reasonability of energy flow analysis optimization was verified with the pinch technology.According to the optimization results,the reasonable range of the pinch-point temperature difference of the distributed energy system of the multi-purpose station is 10-12 K,and the energy saving potential reaches 29.2%.Generally,the research results could provide a good theoretical guidance for the energy saving and consumption reduction of multi-purpose stations as well as the efficiency maximization of energy utilization.

关 键 词：联合站 分布式能源系统 能流分析 系统效率 夹点分析 分析 

分 类 号：TE09[石油与天然气工程]