煤直接液化装置液化油分离过程的模拟与分析  

SIMULATION AND ANALYSIS OF LIQUEFIED OIL SEPARATION PROCESS IN DIRECT COAL LIQUEFACTION UNIT

作　　者：臧庆安 刘艳升 张洪涛 Zang Qing’an;Liu Yansheng;Zhang Hongtao(China Energy Investment Corporation Chemical Industry Department,Beijing 100011)

机构地区：[1]国家能源集团化工部,北京100011

出　　处：《石油炼制与化工》2021年第11期93-101,共9页Petroleum Processing and Petrochemicals

摘　　要：针对首套工业化煤直接液化项目商业运行时油收率低于设计值的问题,根据煤液化装置最佳工况的生产操作数据,通过对比选择出适宜的热力学物性模型,应用Aspen One软件中的Hysys软件,模拟了高压和中压闪蒸分离工艺的操作效果,分析探讨了提高煤液化装置液化油收率的方法。现有高压分离和中压分离操作灵敏高,造成热高压分离罐和热中压分离罐易形成雾沫夹带,引起液化油的拔出率降低,影响液化油收率。针对这一问题,提出了对热高压分离罐和热中压分离罐的运行工艺、设备设计的优化建议,同时建议两个闪蒸罐间增设液力透平,回收动力,减小管线的摩擦减薄,提高装置运行平稳性。In view of the problem that the oil yield of the first industrial direct coal liquefaction unit is lower than the design value during commercial operation,according to the operation data of the coal liquefaction unit under the best working condition,the appropriate thermodynamic physical property model is selected through comparison,and using HYSYS application in Aspen One software,the operation effects of high-pressure and medium-pressure flash separation processes are simulated to explore the methods to improve the yield of liquefied oil in coal liquefaction unit.The existing high-pressure separation and medium pressure separation are highly sensitive,which makes the hot high-pressure separator and hot medium pressure separator liable to cause entrainment,leading to the reduction of the oil extraction rate and the yield of liquefied oil.In view of this problem,the optimization suggestions on the process and equipment design of hot high-pressure separator and hot medium pressure separator are put forward.At the same time,it is suggested to add hydraulic turbine between the two flash tanks to recover power,reduce the friction and thinning of pipeline and improve the operation stability.

关 键 词：煤直接液化 高压分离 流程模拟 油收率 

分 类 号：TQ2[化学工程—有机化工]