公开(公告)号：EP3374713A1

公开(公告)日：2018-09-19

申请号：EP16787986.5

申请日：2016-10-18

申请人： Praxair Technology Inc.

发明人： SARIGIANNIS, Catherine, B. ,  KNIGHT, Anna ,  JUANDI, Evelyn ,  ZHANG, Wei ,  RAUCH, Jeremiah, J.

IPC分类号： F25J3/04

CPC分类号： F25J3/04412 ,  F25J3/0409 ,  F25J3/04175 ,  F25J3/04224 ,  F25J3/04278 ,  F25J3/04296 ,  F25J3/04303 ,  F25J3/04393 ,  F25J3/04812 ,  F25J2210/06 ,  F25J2270/14 ,  F25J2270/40 ,  F25J2270/902

摘要： A system and method for providing supplemental refrigeration to an air separation plant is provided. A closed loop supplemental refrigeration circuit that can be easily retrofitted or added onto an air separation plant that increases the liquid product production capability of the air separation plant. The supplemental refrigeration capacity of the supplemental refrigeration circuit is controlled by removing or adding a portion of the refrigerant in the supplemental refrigeration circuit to adjust the inlet pressure while maintaining a substantially constant volumetric flow rate and substantially constant pressure ratio across the compressor. Removing the refrigerant from the supplemental refrigeration circuit decreases the refrigeration imparted by the supplemental refrigeration circuit and thus provides the capacity to turn-down liquid product make without shutting down the compressors and turbo-expanders in the supplemental refrigeration circuit.

公开(公告)号：EP3149419B1

公开(公告)日：2019-10-30

申请号：EP14736516.7

申请日：2014-06-02

申请人： Praxair Technology, Inc.

发明人： RAUCH, Jeremiah, J. ,  DOWD, Sophia, J. ,  WARTA, Andrew, M. ,  SARIGIANNIS, Catherine, B. ,  ZHANG, Wei

IPC分类号： F25J3/04

公开(公告)号：EP3149419A1

公开(公告)日：2017-04-05

申请号：EP14736516.7

申请日：2014-06-02

申请人： Praxair Technology Inc.

发明人： RAUCH, Jeremiah, J. ,  DOWD, Sophia, J. ,  WARTA, Andrew, M. ,  SARIGIANNIS, Catherine, B. ,  ZHANG, Wei

IPC分类号： F25J3/04

摘要： A system and method for separating air in an air separation plant is provided. The disclosed systems and methods divert a portion of the compressed, purified air stream to a bypass system configured to selectively produce a higher pressure compressed output stream or a lower pressure compressed output stream. The higher pressure and/or lower pressure compressed output streams are cooled in a main heat exchanger by indirect heat transfer with a plurality of product streams from the air separation plant and then rectified in the distillation column system. A second portion of the compressed, purified air stream is partially cooled in the main heat exchanger and expanding in a turbo-expander to produce power and an exhaust stream which is directed to the distillation column system of the air separation plant where it imparts additional refrigeration generated by the expansion of the compressed air stream in the turbo-expander.

摘要翻译： 提供了一种用于分离空气分离设备中的空气的系统和方法。 所公开的系统和方法将一部分压缩的净化空气流转移到配置成选择性地产生较高压力的压缩输出流或低压压缩输出流的旁路系统。 较高压力和/或较低压力的压缩输出流在主热交换器中通过间接传热与来自空气分离设备的多个产物流冷却，然后在蒸馏塔系统中进行精馏。 压缩的纯化空气流的第二部分在主热交换器中部分冷却，并在涡轮膨胀机中膨胀以产生动力和排气流，该排气流被引导到空气分离设备的蒸馏塔系统， 通过涡轮膨胀机中的压缩空气流的膨胀而产生。