冷凝法油气回收增压系统的模拟分析与研究  

Simulation Analysis and Research on Oil and Gas Recovery by Boost Pressure Condensation

作　　者：詹飞龙 赵巍[1] 张华[1] 刘业凤[1] ZHAN Feilong;ZHAOWei;ZHANG Hua;LIU Yefeng(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《真空与低温》2020年第3期211-218,共8页Vacuum and Cryogenics

基　　金：国家自然科学基金(51176124);上海市浦江人才计划资助(17PJ1407200).

摘　　要：采用HYSYS软件模拟研究了两种不同组分的油气在增压条件下的冷凝特性,分析了增压冷凝处理对油气回收率、尾气浓度、除水率的影响。研究表明,在不同温区内,增压对油气冷凝所产生的影响不尽相同,在20^-40℃温区内,增压可以显著地提高油气的回收率和除水率,降低尾气浓度,而在-40^-80℃内,增压所带来的影响逐渐减小,对于-80^-120℃温区,增压造成的影响已经微乎其微。因此适当增压可以提高高温区段的油气冷凝回收量,减少中、低温区冷凝负荷,在满足国家油气排放标准的情况下,提升制冷系统的制冷温区。由此提出了一种增压油气冷凝回收系统,并对其进行了循环性能分析,模拟计算得出系统COP为1.253。同时针对尾气冷量直接排放所造成的冷量浪费,设计了一种回收余冷的增压系统。结果表明,带有余冷回收的系统,单级压缩制冷系统和两级自复叠制冷系统所用的制冷剂流量分别减少了9.3%和53.5%,减少了制冷剂的用量,同时与无余冷回收相比,整个制冷系统的COP提高了8.9%,系统的运行效率得到了优化。The HYSYS software was used to simulate the condensation characteristics of two different components of oil and gas under pressurized conditions.The effects of pressurized condensation treatment on oil recovery rate,tail gas concentration and water removal rate were analyzed.Studies have shown that in different temperature zones,the effect of supercharging on oil and gas condensation characteristics is not the same.Pressurization in the temperature range of 20^-40℃can significantly improve the recovery rate and water removal rate of oil and gas,and reduce the tail gas concentration.In the temperature range of-40^-80℃,the effect of pressurization is gradually reduced.For the temperature range of-80^-120℃,the effect of supercharging has been negligible,so proper pressurization can increase the oil and gas condensation recovery of the high temperature zone and reduces the condensation load in the middle and low temperature zones.Under the condition of meeting the national oil and gas emission standards,the refrigeration temperature zone of the refrigeration system is upgraded,and a pressurized oil and gas condensation recovery system is proposed.For the cyclic performance,the simulation calculated that the system COP was 1.253.At the same time,a cooling system for recovering residual cooling was designed for the waste of cold caused by the direct discharge of exhaust gas.The results shows that the system with residual cooling recovery:the refrigerant flow rate of the single-stage compression refrigeration system and the two-stage self-cascading refrigeration system is respectively reduced by 9.3% and 53.5%,reducing the amount of refrigerant,and compared with the no-cooling recovery. The COP of the entire refrigeration system is increased by 8.9%,andthe operating efficiency of the system is optimized.

关 键 词：模拟 冷凝特性 增压系统 余冷回收 

分 类 号：TB65[一般工业技术—制冷工程]