摘要
为提高油田伴生气中的轻烃回收质量,在梳理丙烷收率计算方法的基础上,确定了影响丙烷收率的参数,并通过单一参数变化和敏感性分析确定了丙烷收率及综合能耗的调参策略,最后将丙烷制冷替换为混合冷剂制冷,进一步降低工艺能耗。结果表明,丙烷收率与诸多参数相关,DHX塔塔顶进料温度是影响丙烷收率和综合能耗的主控因素,当低温分离器温度为-33℃、DHX塔塔顶进料温度-52℃、DHX塔塔压2 MPa、膨胀机出口压力1.9 MPa时,综合能耗从3 364 kW降至3 241 kW,同时液化石油气和稳定轻油的质量满足产品要求;当制冷剂中C_(2)、C_(3)和n-C_(4)的摩尔流量分别为19.16 kmol/h、53.43 kmol/h、37.41 kmol/h时,综合能耗可进一步降低,与最初优化前相比,能耗降幅9.06%。
In order to improve the recovery quality of light hydrocarbon in oilfield associated gas,on the basis of sorting out the calculation method of propane yield,the parameters affecting propane yield are determined,and the adjustment strategy of propane yield and comprehensive energy consumption are determined through single parameter change and sensitivity analysis.Finally,the propane refrigeration is replaced by mixed refrigerant to further reduce the energy consumption of process.The results show that sine the propane yield is related to many parameters,the top feed temperature of DHX tower is the main factors affecting the propane yield and comprehensive energy consumption.When the temperature of low temperature separator is-33℃,the top feed temperature of DHX tower is-52℃,the tower pressure of DHX tower is 2 MPa,and the outlet pressure of expander is 1.9 MPa,the comprehensive energy consumption is reduced from 3364 kW to 3241 kW,and at the same time,the quality of liquefied petroleum gas and stabilized light oil meet the product requirements.When the molar flow rate of C_(2),C_(3) and n-C_(4) in the refrigerant is 19.16 kmol/h,53.43 kmol/h and 37.41 kmol/h,respectively,the comprehensive energy consumption can be further reduced,and the energy consumption is reduced by 9.06% compared with initial optimization.
作者
吴喆庆
WU Zheqing(Natural Gas Company of Daqing Oilfield Co.,Ltd.)
出处
《石油石化节能与计量》
CAS
2024年第9期38-42,共5页
Energy Conservation and Measurement in Petroleum & Petrochemical Industry
关键词
天然气
轻烃回收
丙烷收率
综合能耗
混合冷剂
natural gas
light hydrocarbon recovery
propane yield
comprehensive energy consumption
mixed refrigerant
