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公开(公告)号：US11933540B2
公开(公告)日：2024-03-19
申请号：US18300033
申请日：2023-04-13
申请人： Hanfei Tuo , Zhengrong Xu
发明人： Hanfei Tuo , Zhengrong Xu
CPC分类号： F25J3/04412 , F25J3/0257 , F25J3/04012 , F25J3/04763 , F25J1/0012 , F25J2200/50 , F25J2210/40 , F25J2250/20
摘要： Enhancements to a dual column, nitrogen producing cryogenic air separation unit are provided. Such enhancements include an improved air separation cycle that uses multiple condenser-reboilers and recycles a portion of the vapor from one or more of the condenser-reboilers to the incoming feed stream and or the compressed purified air streams to yield improvements in such dual column, nitrogen producing cryogenic air separation units. The multiple condenser-reboilers preferably include an integrated condenser-reboiler arrangement comprising a heat exchanger having a set of nitrogen condensing passages, a first set and second set of boiling passages, and a phase separator.
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公开(公告)号：US20220290813A1
公开(公告)日：2022-09-15
申请号：US17517031
申请日：2021-11-02
申请人： Chao Liang , Seth A. Potratz , Lee J. Rosen , Hanfei Tuo , Rui Ma
发明人： Chao Liang , Seth A. Potratz , Lee J. Rosen , Hanfei Tuo , Rui Ma
摘要： A cryogenic vaporization system and a method for controlling the system are provided. The system includes a first vaporizer arrangement and a second vaporizer arrangement configured for receiving a liquid cryogen and outputting a superheated vapor. The second vaporizer arrangement is connected in parallel with the first vaporizer arrangement, and includes one or more banks of ambient air vaporizer (AAV) units or loose fill media with a high heat capacity. The second vaporizer arrangement has a different configuration than that of the first vaporizer arrangement. The system further includes at least one control valve controlling provision of the liquid cryogen to at least one of the first vaporizer arrangement and the second vaporizer arrangement.
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公开(公告)号：US20200080773A1
公开(公告)日：2020-03-12
申请号：US16124636
申请日：2018-09-07
申请人： Zhengrong Xu , Maulik R. Shelat , Nick J. Degenstein , Hanfei Tuo
发明人： Zhengrong Xu , Maulik R. Shelat , Nick J. Degenstein , Hanfei Tuo
IPC分类号： F25J3/04
摘要： A cryogenic air separation unit that provides flexibility in the production of liquid products is disclosed. The present cryogenic air separation unit and associated operating methods involves the use of a dual nozzle arrangement for the main heat exchanger that allows a turbine air stream draw from the main heat exchanger at different temperatures to provide refrigeration to the cryogenic air separation unit which, in turn, enables different production modes for the various liquid products.
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14.发明申请公开(公告)号：US20190072326A1
公开(公告)日：2019-03-07
申请号：US15695381
申请日：2017-09-05
申请人： Vijayaraghavan S. Chakravarthy , Hanfei Tuo , Maulik R. Shelat , James R. Dray , Nick J. Degenstein
发明人： Vijayaraghavan S. Chakravarthy , Hanfei Tuo , Maulik R. Shelat , James R. Dray , Nick J. Degenstein
IPC分类号： F25J3/04
摘要： A system and method for recovery of rare gases such as neon, helium, xenon, and krypton in an air separation unit is provided. The rare gas recovery system comprises a non-condensable stripping column linked in a heat transfer relationship with a xenon-krypton column via an auxiliary condenser-reboiler. The non-condensable stripping column produces a rare gas containing overhead that is directed to the auxiliary condenser-reboiler where most of the neon is captured in a non-condensable vent stream that is further processed to produce a crude neon vapor stream that contains greater than about 50% mole fraction of neon with the overall neon recovery exceeding 95%. The xenon-krypton column further receives two streams of liquid oxygen from the lower pressure column and the rare gas containing overhead from the non-condensable stripping column and produces a crude xenon and krypton liquid stream and an oxygen-rich overhead.
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公开(公告)号：US09664442B2
公开(公告)日：2017-05-30
申请号：US15153179
申请日：2016-05-12
申请人： Hanfei Tuo , Karl K. Kibler , Maulik R. Shelat
发明人： Hanfei Tuo , Karl K. Kibler , Maulik R. Shelat
CPC分类号： F25J3/04412 , F25J5/005 , F25J2200/06 , F25J2200/54 , F25J2250/02 , F25J2250/04 , F25J2250/10 , F25J2250/20 , F25J2290/32 , F25J2290/44 , F28F2265/12
摘要： A system and method for the concurrent condensation of a nitrogen-rich vapor and vaporization of an oxygen-rich liquid in a distillation column based air separation unit is provided. The disclosed system includes a condenser-reboiler heat exchanger located between a lower pressure column and a higher pressure column and configured to condense a nitrogen-rich vapor from the higher pressure column and partially vaporize an oxygen-rich liquid from the lower pressure column. Within the condenser-reboiler heat exchanger, the nitrogen-rich vapor flows in an upward direction such that any non-condensables present in the nitrogen-rich vapor will accumulate proximate the upper portion or top of the condenser-reboiler modules where they can be easily removed through venting by means of a venting apparatus having a plurality of perforated tubes.
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公开(公告)号：US11976789B2
公开(公告)日：2024-05-07
申请号：US17517110
申请日：2021-11-02
申请人： Chao Liang , Lee J. Rosen , Seth A. Potratz , Hanfei Tuo , Rakesh Ranjan
发明人： Chao Liang , Lee J. Rosen , Seth A. Potratz , Hanfei Tuo , Rakesh Ranjan
IPC分类号： F17C9/04
CPC分类号： F17C9/04 , F17C2223/0161 , F17C2250/032 , F17C2250/0631
摘要： A vaporization system and control method are provided. Liquid cryogen is provided to first ambient air vaporizer (AAV) units. When an output superheated vapor temperature is less than a threshold, the liquid cryogen is provided to second AAV units. When greater than or equal to the threshold, it is determined whether the second AAV units are defrosted. When defrosted, the liquid cryogen is provided to the second AAV units. When not defrosted, it is determined whether ice has formed on the first AAV units. When not formed, it is again determined whether the superheated vapor temperature is less than the threshold. When formed, it is determined whether a current ambient condition is favorable to defrosting the second AAV units. When not favorable, the liquid cryogen is provided to the second bank of AAV units. When favorable, it is again determined whether the superheated vapor temperature is less than the threshold.
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公开(公告)号：US10295254B2
公开(公告)日：2019-05-21
申请号：US15695381
申请日：2017-09-05
申请人： Vijayaraghavan S. Chakravarthy , Hanfei Tuo , Maulik R. Shelat , James R. Dray , Nick J. Degenstein
发明人： Vijayaraghavan S. Chakravarthy , Hanfei Tuo , Maulik R. Shelat , James R. Dray , Nick J. Degenstein
摘要： A system and method for recovery of rare gases such as neon, helium, xenon, and krypton in an air separation unit is provided. The rare gas recovery system comprises a non-condensable stripping column linked in a heat transfer relationship with a xenon-krypton column via an auxiliary condenser-reboiler. The non-condensable stripping column produces a rare gas containing overhead that is directed to the auxiliary condenser-reboiler where most of the neon is captured in a non-condensable vent stream that is further processed to produce a crude neon vapor stream that contains greater than about 50% mole fraction of neon with the overall neon recovery exceeding 95%. The xenon-krypton column further receives two streams of liquid oxygen from the lower pressure column and the rare gas containing overhead from the non-condensable stripping column and produces a crude xenon and krypton liquid stream and an oxygen-rich overhead.
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18.发明申请公开(公告)号：US20160258677A1
公开(公告)日：2016-09-08
申请号：US15153124
申请日：2016-05-12
申请人： Hanfei Tuo , Karl K. Kibler , Maulik R. Shelat
发明人： Hanfei Tuo , Karl K. Kibler , Maulik R. Shelat
IPC分类号： F25J3/04
CPC分类号： F25J3/04412 , F25J5/005 , F25J2200/06 , F25J2200/54 , F25J2250/02 , F25J2250/04 , F25J2250/10 , F25J2250/20 , F25J2290/32 , F25J2290/44 , F28F2265/12
摘要： A system and method for the concurrent condensation of a nitrogen-rich vapor and vaporization of an oxygen-rich liquid in a distillation column based air separation unit is provided. The disclosed system includes a condenser-reboiler heat exchanger located between a lower pressure column and a higher pressure column and configured to condense a nitrogen-rich vapor from the higher pressure column and partially vaporize an oxygen-rich liquid from the lower pressure column. Within the condenser-reboiler heat exchanger, the nitrogen-rich vapor flows in an upward direction such that any non-condensables present in the nitrogen-rich vapor will accumulate proximate the upper portion or top of the condenser-reboiler modules where they can be easily removed through venting by means of a venting apparatus having a plurality of perforated tubes.
摘要翻译： 提供了一种用于富氮蒸气的同时冷凝和富氧液体蒸发在基于蒸馏塔的空气分离单元中的系统和方法。 所公开的系统包括位于低压塔和较高压力塔之间的冷凝器 - 再沸器热交换器，并且构造成冷凝来自较高压力塔的富氮蒸汽并且从低压塔部分蒸发富氧液体。 在冷凝器 - 再沸器热交换器内，富氮蒸气沿向上方向流动，使得存在于富氮蒸汽中的任何不可冷凝物将在冷凝器 - 再沸器模块的上部或上部附近积聚，在那里它们可以容易地 通过具有多个穿孔管的排气装置通过排气而去除。
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公开(公告)号：US09366476B2
公开(公告)日：2016-06-14
申请号：US14947466
申请日：2015-11-20
申请人： Hanfei Tuo , Karl K. Kibler , Maulik R. Shelat
发明人： Hanfei Tuo , Karl K. Kibler , Maulik R. Shelat
CPC分类号： F25J3/04412 , F25J5/005 , F25J2200/06 , F25J2200/54 , F25J2250/02 , F25J2250/04 , F25J2250/10 , F25J2250/20 , F25J2290/32 , F25J2290/44 , F28F2265/12
摘要： A system and method for the concurrent condensation of a nitrogen-rich vapor and vaporization of an oxygen-rich liquid in a distillation column based air separation unit is provided. The disclosed system includes a condenser-reboiler heat exchanger located between a lower pressure column and a higher pressure column and configured to condense a nitrogen-rich vapor from the higher pressure column and partially vaporize an oxygen-rich liquid from the lower pressure column. Within the condenser-reboiler heat exchanger, the nitrogen-rich vapor flows in an upward direction such that any non-condensables present in the nitrogen-rich vapor will accumulate proximate the upper portion or top of the condenser-reboiler modules where they can be easily removed through venting by means of a venting apparatus having a plurality of perforated tubes.
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公开(公告)号：US20160076809A1
公开(公告)日：2016-03-17
申请号：US14947466
申请日：2015-11-20
申请人： Hanfei Tuo , Karl K. Kibler , Maulik R. Shelat
发明人： Hanfei Tuo , Karl K. Kibler , Maulik R. Shelat
IPC分类号： F25J3/04
CPC分类号： F25J3/04412 , F25J5/005 , F25J2200/06 , F25J2200/54 , F25J2250/02 , F25J2250/04 , F25J2250/10 , F25J2250/20 , F25J2290/32 , F25J2290/44 , F28F2265/12
摘要： A system and method for the concurrent condensation of a nitrogen-rich vapor and vaporization of an oxygen-rich liquid in a distillation column based air separation unit is provided. The disclosed system includes a condenser-reboiler heat exchanger located between a lower pressure column and a higher pressure column and configured to condense a nitrogen-rich vapor from the higher pressure column and partially vaporize an oxygen-rich liquid from the lower pressure column. Within the condenser-reboiler heat exchanger, the nitrogen-rich vapor flows in an upward direction such that any non-condensables present in the nitrogen-rich vapor will accumulate proximate the upper portion or top of the condenser-reboiler modules where they can be easily removed through venting by means of a venting apparatus having a plurality of perforated tubes.
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