三甘醇脱水工艺参数与流程优化研究
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摘要
针对当前三甘醇脱水装置存在的效率低和能耗高的问题,通过开展三甘醇脱水工艺参数与流程优化研究,结果表明:应用HYSYS自带优化器优化三甘醇脱水装置参数后,在重沸器温度为200℃,汽提气用量、入塔贫甘醇流量在设计值范围内,优化后单位能耗比优化前单位能耗平均降低约8.7%。共沸再生脱水工艺流程的贫液浓度约为99.8%,三甘醇贫液损失量约为传统三甘醇脱水工艺的10%,脱水后干气水露点比传统三甘醇脱水工艺低38℃左右。通过开展优化研究使三甘醇脱水装置的能耗更低、脱水效率更高,为现有设备的节能降耗设计和平稳运行提供参考依据。
Aiming at the problems of low efficiency and high energy consumption of TEG dehydration unit at present, optimization research on the process parameters and process flow of dehydration of TEG dehydration was carried out. The results showed that: after the parameters of TEG dehydration unit was optimized by HYSYS optimizer, the reboiler temperature was 200 °C, the amount of stripping gas and the flow rate of lean ethanol flow into the tower were within the range of design value. After the optimization, the unit energy consumption decreased by about 8.7%. The concentration of lean liquid TEG obtained by the azeotropic regeneration process reached to 99.8%. The loss of lean liquid TEG was about 10% of the traditional TEG dehydration process, and the water dew point of dry natural gas was about 38°C lower than that of the traditional TEG dehydration process. Through the optimization research, the energy consumption of the TEG dehydration unit was lower and the dehydration efficiency was higher, which could provide references for the transformation and operation parameters optimization of the traditional TEG dehydration plant.
Aiming at the problems of low efficiency and high energy consumption of TEG dehydration unit at present, optimization research on the process parameters and process flow of dehydration of TEG dehydration was carried out. The results showed that: after the parameters of TEG dehydration unit was optimized by HYSYS optimizer, the reboiler temperature was 200 °C, the amount of stripping gas and the flow rate of lean ethanol flow into the tower were within the range of design value. After the optimization, the unit energy consumption decreased by about 8.7%. The concentration of lean liquid TEG obtained by the azeotropic regeneration process reached to 99.8%. The loss of lean liquid TEG was about 10% of the traditional TEG dehydration process, and the water dew point of dry natural gas was about 38°C lower than that of the traditional TEG dehydration process. Through the optimization research, the energy consumption of the TEG dehydration unit was lower and the dehydration efficiency was higher, which could provide references for the transformation and operation parameters optimization of the traditional TEG dehydration plant.
引文
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[3]胡耀强,何飞,韩建红.天然气脱水技术[J].化学工程与装备,2013,3(3):151-153.
[4]边江,蒋文明,刘杨,等.电磁分离技术现状及在油水分离领域的应用[J].应用化工,2016,45(9):1763-1766.
[5]Jiang W M,Bian J,Wu A,et al.Investigation of supersonic separation mechanism of CO2 in natural gas applying the Discrete Particle Method[J].Chemical Engineering and Processing,2018,123(1):272-279.
[6]蒋洪,杨昌平,吴敏,等.天然气三甘醇脱水装置节能分析[J].石油与天然气化工,2010,39(2):122-127.
[7]王泉波,闫飞,于波,等.三塔等压吸附脱水天然气脱水工艺[J].油气田地面工程,2013(12):94-95.
[8]刘娜,黄雪莉,黄河.天然气低温分离工艺研究[J].化学工业,2013,31(8):41-43.
[9]刘丽.天然气膜法脱水净化技术及应用[J].当代化工,2001,30(4):214-218.
[10]R.W Baker.Future direction of membrane gas separation technology[J].Journal of Industrial and Engineering Chemistry,2002,41(5):1393-1411.
[11]刘杨,边江,郭晓明,等.Laval喷管结构对流动特性和制冷性能的影响[J].低温与超导,2016,44(12):67-71,76.
[12]刘杨,边江,郭晓明,等.Laval喷管内激波位置的计算及制冷性能分析[J].低温与超导,2016,44(6):14-17.
[13]Bian J,Jiang W M,Teng L,et al.Structure improvements and numerical simulation of supersonic separators[J].Chemical Engineering and Processing,2016,110(12):214-219.
[14]Bian J,Jiang W M,Hou D Y,et al.Condensation characteristics of CH4-CO2 mixture gas in a supersonic nozzle[J].Powder Technology,2018,329(3):1-11.
[15]Jiang W M,Bian J,Liu Y,et al.Investigation of flow characteristics and the condensation mechanism of ternary mixture in a supersonic nozzle[J].Journal of Natural Gas Science and Engineering,2016,34(5):1054-1061.
[16]张红静,苏花卫,杨恂.文23气田三甘醇脱水系统工艺改进措施研究[J].天然气技术与经济,2016,10(5):44-46.
[17]蒋洪,杨昌平,朱聪.天然气脱水装置工艺分析与改进[J].天然气化工(C1化学与化工),2009,34(6):49-53.
[18]李凤华,刘德绪,曹学文,等.储气库地面脱水系统用能优化研究[J].当代化工,2017,46(2):311-315.
[19]吉宁.天然气脱水装置模拟及能耗优化设计的研究[D].西南石油大学,2015.
[20]陈赓良.天然气三甘醇脱水工艺的技术进展[J].石油与天然气化工,2015,44(6):1-9.
[21]贺三,刘阳,樊林华,等.DRIZO脱水工艺模拟分析[J].天然气与石油,2016,34(1):44-48.