It has long been recognized that the flow pattern,especially the velocity distribution of the fluid,is of great importance in determining the performance of the equipment using structured packing as its internals.By u...It has long been recognized that the flow pattern,especially the velocity distribution of the fluid,is of great importance in determining the performance of the equipment using structured packing as its internals.By using three-dimensional laser Doppler velocimetry(LDV),the liquid velocity distribution of the glycerol aqueous solution was measured in a typical unit of structured packing(Mellapak 350Y).Time averaged three-dimensional velocity distributions of the unit were measured at different flow rates.The experimental data showed that the liquid velocity profile of the single phase flow was complex because of the special geometry of the unit of structured packing.In the central region of the unit,the liquid was mixed strongly and re-distributed.It was the main cause generating the vortexes and secondary flow.展开更多
智能模拟工厂技术包括生产装置的动态模拟、控制系统的模拟以及运行生产装置需要的操作规程等。以国内某天然气乙烷回收装置为例,使用智能模拟工厂技术,开发了天然气乙烷回收装置的智能模拟系统,不仅验证了控制方案和工艺流程设计的合理...智能模拟工厂技术包括生产装置的动态模拟、控制系统的模拟以及运行生产装置需要的操作规程等。以国内某天然气乙烷回收装置为例,使用智能模拟工厂技术,开发了天然气乙烷回收装置的智能模拟系统,不仅验证了控制方案和工艺流程设计的合理性,而且通过预调试分散控制系统(Distributed Control System,DCS)组态,得到比例、积分、微分(Proportional Integral Derivative,PID)控制参数的初值。此外,天然气乙烷回收装置的智能模拟系统具有操作培训功能,操作人员可以根据需要反复进行开停工操作,从而制定出适用于实际生产的操作卡,系统要求操作人员执行操作卡要求的步骤,然后给出考核评价。通过使用天然气乙烷回收装置的智能模拟系统,验证了智能模拟工厂技术在天然气乙烷回收装置上的应用价值,同时也为技术的智能优化、生产运行阶段的智能生产操作奠定了基础。展开更多
针对煤基天然气(SNG)设计了一种C3/MRC液化工艺,考察了丙烷制冷循环和混合冷剂制冷循环中各冷箱温度分布对液化功耗的影响,煤基天然气节流压力对液化率的影响,对比了不同组成原料气的液化比功耗。研究结果表明:C3/MRC液化工艺适用于煤...针对煤基天然气(SNG)设计了一种C3/MRC液化工艺,考察了丙烷制冷循环和混合冷剂制冷循环中各冷箱温度分布对液化功耗的影响,煤基天然气节流压力对液化率的影响,对比了不同组成原料气的液化比功耗。研究结果表明:C3/MRC液化工艺适用于煤基天然气,且冷箱热流体出口温度分布对液化功耗影响较大;BOG气体中H2含量随节流后压力增高而增大;液化煤基天然气的单位功耗高于气田天然气。优化后煤基天然气的液化率达到94.95%,比功耗为0.34 k W·h/kg LNG。展开更多
文摘It has long been recognized that the flow pattern,especially the velocity distribution of the fluid,is of great importance in determining the performance of the equipment using structured packing as its internals.By using three-dimensional laser Doppler velocimetry(LDV),the liquid velocity distribution of the glycerol aqueous solution was measured in a typical unit of structured packing(Mellapak 350Y).Time averaged three-dimensional velocity distributions of the unit were measured at different flow rates.The experimental data showed that the liquid velocity profile of the single phase flow was complex because of the special geometry of the unit of structured packing.In the central region of the unit,the liquid was mixed strongly and re-distributed.It was the main cause generating the vortexes and secondary flow.
文摘智能模拟工厂技术包括生产装置的动态模拟、控制系统的模拟以及运行生产装置需要的操作规程等。以国内某天然气乙烷回收装置为例,使用智能模拟工厂技术,开发了天然气乙烷回收装置的智能模拟系统,不仅验证了控制方案和工艺流程设计的合理性,而且通过预调试分散控制系统(Distributed Control System,DCS)组态,得到比例、积分、微分(Proportional Integral Derivative,PID)控制参数的初值。此外,天然气乙烷回收装置的智能模拟系统具有操作培训功能,操作人员可以根据需要反复进行开停工操作,从而制定出适用于实际生产的操作卡,系统要求操作人员执行操作卡要求的步骤,然后给出考核评价。通过使用天然气乙烷回收装置的智能模拟系统,验证了智能模拟工厂技术在天然气乙烷回收装置上的应用价值,同时也为技术的智能优化、生产运行阶段的智能生产操作奠定了基础。
文摘针对煤基天然气(SNG)设计了一种C3/MRC液化工艺,考察了丙烷制冷循环和混合冷剂制冷循环中各冷箱温度分布对液化功耗的影响,煤基天然气节流压力对液化率的影响,对比了不同组成原料气的液化比功耗。研究结果表明:C3/MRC液化工艺适用于煤基天然气,且冷箱热流体出口温度分布对液化功耗影响较大;BOG气体中H2含量随节流后压力增高而增大;液化煤基天然气的单位功耗高于气田天然气。优化后煤基天然气的液化率达到94.95%,比功耗为0.34 k W·h/kg LNG。
