摘要
小型高压引射天然气液化装置在实际运行过程中,存在着明显的液化效率低、能耗大等问题。为了进一步提高系统性能,采用HYSYS软件对5×10^4 m^3/d处理量的高压引射液化工艺进行模拟与分析,探究主要工艺参数对系统性能的影响。研究结果表明:①引射器高压入口压力(引射压力)、出口压力以及净化气中不凝气体组分含量对系统功耗、出液率会产生显著的影响;②引射压力增高,预冷系统功耗、冷箱出液率将逐渐增大,系统总功耗呈现先增大后减小趋势,存在着最佳引射压力,在出口压力介于0.5~1.8MPa的范围内,所模拟引射压力系列中20MPa时系统总功耗最小;③引射器出口压力增高,循环气压缩机、系统总功耗呈现非线性降低趋势,降低速率逐渐减小,而预冷系统功耗、冷箱出液率将逐渐增大;④净化气中不凝气组分含量增加,系统出液产量、冷箱出液率将显著下降,单位产量能耗逐渐增大,因而该工艺并不适宜处理高含不凝气体组分的净化气。结论认为,该研究成果可以为小型高压引射天然气液化装置工艺设计与优化提供参考。
During the practical application,domestic small-scale high-pressure ejection natural gas liquefaction plants are suffered from some obvious problems,such as low liquefaction efficiency and high energy consumption.For further improving the system performance,a high-pressure ejection liquefaction process with the capacity of 5×10^4 m^3/d was simulated and analyzed using HYSYS,and the influences of main technological parameters on system performance were explored.And the following research results were obtained.First,the high inlet pressure of ejector(ejection pressure),the outlet pressure and the content of non-condensable gas components in the feed gas have a significant impact on system energy consumption and liquefaction rate.Second,with the increase of the ejection pressure,the power consumption of pre-cooling system and the liquefaction efficiency of cooling box rise gradually,and the total system power consumption increases firstly and then decreases.There is an optimal ejection pressure.When the outlet pressure is in the range of 0.5-1.8 MPa,the total power consumption of the system reaches the minimum when the simulated ejection pressure is 20 MPa.Third,as the outlet pressure of ejector is enhanced,the power consumption of circulating gas compressor and liquefaction system decline nonlinearly and the decline rate decreases gradually,while the power consumption of pre-cooling system and the liquefaction rate of cooling box increase gradually.Fourth,as the content of non-condensable components in the feed gas increases,the liquefaction yield of system and the liquefaction rate of cooling box drop distinctly,and the energy consumption of unit production increases gradually.Therefore,this technology is not suitable for treating the feed gas with high content of non-condensable components.In conclusion,the research results can provide reference for the process design and optimization of small high-pressure ejection natural gas liquefaction plants.
作者
钱德松
许剑
池胜高
周斌
简志勇
杨凡
高腾
QIAN Desong;XU Jian;CHI Shenggao;ZHOU Bin;JIAN Zhiyong;YANG Fan;GAO Teng(Institute of Sinopec Oilfield Equipment Corporation,Wuhan,Hubei 430205,China;Sinopec Key Laboratory of Petroleum Equipment,Wuhan,Hubei 430205,China;College of Chemical Engineering,China University of Petroleum<East China>,Qingdao,Shandong 266580,China)
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2020年第4期118-124,共7页
Natural Gas Industry
基金
“十三五”国家科技重大专项“深层页岩气开发关键装备及工具研制”(编号:2016ZX05038)。
关键词
小型天然气液化装置
高压引射液化工艺
引射器
工艺模拟
最佳引射压力
不凝气组分
出液率
系统能耗
Small-scale natural gas liquefaction plant
High-pressure ejection liquefaction process
Ejector
Process simulation
Optimal ejection pressure
Non-condensable gas component
Liquefaction rate
System energy consumption
