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2. 发明授权

US6155076A Method to optimize thermodynamic expansion in gas liquefaction processes 失效
标题翻译：优化气液化过程中热力学膨胀的方法
公开(公告)号：US6155076A
公开(公告)日：2000-12-05
申请号：US192910
申请日：1998-11-16
申请人： David M. Cullen , Hans E. Kimmel
发明人： David M. Cullen , Hans E. Kimmel
IPC分类号： F02C1/02 , F25J1/00 , F25J3/00
CPC分类号： F02C1/02 , F25J1/0042 , F25J1/0057 , F25J1/0244 , F25J2240/30 , F25J2240/40 , Y10S62/91
摘要： For gas liquefaction processes, thermodynamic expansion is optimized by use of a hydraulic turbine expander for liquefied gases which can be adjusted to different flow rates and differential pressures by varying the rotational speed and/or guide vane position. The turbine expander is disposed in-line between an upstream system for gas liquefaction and a downstream system for liquefied gas handling including a terminal vessel for storage or phase separation. The invention further includes a device to measure the terminal pressure at an inlet pipe of and/or inside the terminal vessel, and a device to control the turbine expander in response to pressure measurements. The turbine controller sets the rotational speed and/or the guide vane position of the expander depending on changes in the terminal pressure such that the pressure inside the terminal vessel remains constant at a certain target value for different thermodynamic, hydraulic or chemical conditions of the gas liquefaction process. In the preferred embodiment the terminal pressure measuring device provides corresponding electronic, optical or mechanical signals to the turbine controller which determines the rotational speed and/or guide vane position in such a way that the pressure drop across the turbine expander and the downstream system continuously meet the target value of the terminal pressure.
摘要翻译：对于气体液化过程，通过使用用于液化气体的液压涡轮膨胀机来优化热力学膨胀，其可以通过改变转速和/或导向叶片位置来调节到不同的流量和压差。涡轮膨胀机在用于气体液化的上游系统和用于液化气处理的下游系统之间成直线放置，包括用于储存或相分离的终端容器。本发明还包括一种用于测量终端容器的入口管和/或内部的端子压力的装置，以及响应于压力测量来控制涡轮膨胀机的装置。涡轮机控制器根据端子压力的变化来设定膨胀机的转速和/或导向叶片位置，使得终端容器内的压力保持恒定在一定的目标值，用于气体的不同热力学，液压或化学条件液化过程。在优选实施例中，端子压力测量装置向涡轮机控制器提供对应的电子，光学或机械信号，该信号确定转速和/或导向叶片位置，使得涡轮膨胀机和下游系统两端的压降连续相遇目标值的终端压力。

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