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公开(公告)号：US06526777B1
公开(公告)日：2003-03-04
申请号：US09839907
申请日：2001-04-20
IPC分类号： F25J302
CPC分类号： F25J3/0242 , F25J1/0022 , F25J1/0035 , F25J1/004 , F25J1/0042 , F25J1/0201 , F25J1/0229 , F25J3/0209 , F25J3/0233 , F25J3/0238 , F25J2200/04 , F25J2200/70 , F25J2200/72 , F25J2205/04 , F25J2210/06 , F25J2215/04 , F25J2220/60 , F25J2220/62 , F25J2220/66 , F25J2230/60 , F25J2235/60 , F25J2240/02 , F25J2240/30 , F25J2240/40 , F25J2245/02 , F25J2260/20 , F25J2270/02 , F25J2270/90 , F25J2290/12 , F25J2290/62
摘要： A process for liquefying natural gas in conjunction with processing natural gas to recover natural gas liquids (NGL) is disclosed. In the process, the natural gas stream to be liquefied is taken from one of the streams in the NGL recovery plant and cooled under pressure to condense it. A distillation stream is withdrawn from the NGL recovery plant to provide some of the cooling required to condense the natural gas stream. The condensed natural gas stream is expanded to an intermediate pressure and supplied to a mid-column feed point on a distillation column. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas, and is routed to the NGL recovery plant so that these heavier hydrocarbons can be recovered in the NGL product. The overhead vapor from the distillation column is cooled and condensed, and a portion of the condensed stream is supplied to a top feed point on the distillation column to serve as reflux. A second portion of the condensed stream is expanded to low pressure to form the liquefied natural gas stream.
摘要翻译： 公开了天然气液化天然气加工天然气回收天然气液体（NGL）的方法。 在此过程中，待液化的天然气流从NGL回收设备中的一条流中取出，并在压力下冷却以使其冷凝。 将蒸馏物流从NGL回收装置中取出以提供冷凝天然气流所需的一些冷却。 将冷凝的天然气流扩展到中间压力并供应到蒸馏塔上的中间塔进料点。 来自该蒸馏塔的底部产物优选包含比甲烷重的任何烃的大部分，否则会降低液化天然气的纯度，并被送往NGL回收设备，以便可以在NGL产物中回收这些较重的烃。 来自蒸馏塔的塔顶蒸气被冷却并冷凝，并且将一部分冷凝流供应到蒸馏塔上的顶部进料点以用作回流。 冷凝流的第二部分膨胀到低压以形成液化的天然气流。
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公开(公告)号：US5881569A
公开(公告)日：1999-03-16
申请号：US915065
申请日：1997-08-20
IPC分类号： F25J3/02
CPC分类号： F25J3/0242 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/70 , F25J2200/76 , F25J2205/04 , F25J2210/06 , F25J2210/12 , F25J2230/30 , F25J2235/60 , F25J2240/02 , F25J2245/02 , F25J2270/02 , F25J2270/12 , F25J2270/60
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is divided into first and second streams, and the second stream is expanded to the fractionation tower pressure and supplied to the column at a mid-column feed position. A recycle stream is withdrawn from the tower overhead after it has been warmed and compressed, and is combined with the first stream. The combined stream is cooled to condense substantially all of it, and is thereafter expanded to the fractionation tower pressure and supplied to the fractionation tower at a top column feed position. The pressure of the compressed recycle stream and the quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 将该流分成第一和第二流，并将第二流扩展至分馏塔压力，并在中间柱进料位置供应至塔。 在塔架顶部被加热和压缩之后，再循环流从第一塔流出。 将合并的流冷却以基本上将其冷凝，然后将其扩展至分馏塔压力，并在顶部塔进料位置供应至分馏塔。 压缩的再循环料流的压力以及进料塔的进料的数量和温度对塔顶温度的维持是有效的，从而回收主要部分的所需组分。
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公开(公告)号：US5568737A
公开(公告)日：1996-10-29
申请号：US337172
申请日：1994-11-10
CPC分类号： F25J3/0242 , C10G5/06 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/72 , F25J2200/76 , F25J2205/04 , F25J2210/06 , F25J2210/12 , F25J2230/08 , F25J2240/02 , F25J2245/02 , F25J2270/02 , Y10S62/901
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is divided into first and second streams. The first stream is cooled to condense substantially all of it and is thereafter expanded to the fractionation tower pressure and supplied to the fractionation tower at a first mid-column feed position. The second stream is expanded to the tower pressure and is then supplied to the column at a second mid-column feed position. A recycle stream is withdrawn from the tower overhead after it has been warmed and compressed. The compressed recycle stream is cooled sufficiently to substantially condense it, and is then expanded to the pressure of the distillation column and supplied to the column at a top column feed position. The pressure of the compressed recycle stream and the quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 流被分成第一和第二流。 将第一流冷却至基本上全部冷凝，然后将其膨胀至分馏塔压力，并以第一中间塔进料位置供应至分馏塔。 将第二流扩张到塔压力，然后在第二中柱进料位置处供给塔。 在塔顶被加热和压缩之后，再循环流从塔架塔架中取出。 将压缩的再循环料流充分冷却以使其基本冷凝，然后膨胀至蒸馏塔的压力，并在顶部塔进料位置供应至塔。 压缩的再循环料流的压力以及进料塔的进料的数量和温度对塔顶温度的维持是有效的，从而回收主要部分的所需组分。
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公开(公告)号：US5555748A
公开(公告)日：1996-09-17
申请号：US477444
申请日：1995-06-07
IPC分类号： F25J3/02
CPC分类号： F25J3/0238 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0242 , F25J2200/02 , F25J2200/70 , F25J2205/04 , F25J2210/06 , F25J2210/12 , F25J2235/60 , F25J2240/02 , F25J2270/90
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled to partially condense it, then separated to provide a first vapor stream and a first condensed stream. The first vapor stream is divided into first and second streams, then the first stream is combined with the first condensed stream. The combined stream is cooled and expanded to an intermediate pressure to partially condense it, then separated to provide a second vapor stream and a second condensed stream. The second vapor stream is cooled at the intermediate pressure to condense substantially all of it and is thereafter expanded to the fractionation tower pressure and supplied to the fractionation tower at a top feed position. The second condensed stream is subcooled at the intermediate pressure, expanded to the tower pressure, and is supplied to the column at a first mid-column feed position. The second stream is expanded to the tower pressure and is then supplied to the column at a second mid-column feed position. The quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered. In an alternative embodiment, the combined stream is cooled at essentially inlet pressure to partially condense it, then separated at pressure to provide the second vapor stream and the second condensed stream.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 将物流冷却以部分地冷凝，然后分离以提供第一蒸气流和第一冷凝流。 将第一蒸汽流分成第一和第二流，然后将第一流与第一冷凝流组合。 将合并的流冷却并膨胀至中间压力以部分地冷凝，然后分离以提供第二蒸气流和第二冷凝流。 第二蒸气流在中间压力下冷却，以基本上将其全部冷凝，然后膨胀至分馏塔压力，并在顶部进料位置供应至分馏塔。 将第二冷凝物流在中间压力下过冷，膨胀至塔压力，并以第一中柱进料位置供应到塔中。 将第二流扩张到塔压力，然后在第二中柱进料位置处供给塔。 进料到塔的数量和温度对塔顶温度的维持是有效的，从而回收主要部分的所需组分。 在替代实施例中，组合的流在基本入口压力下冷却以部分地冷凝，然后在压力下分离以提供第二蒸气流和第二冷凝流。
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公开(公告)号：US06182469B2
公开(公告)日：2001-02-06
申请号：US09439508
申请日：1999-11-12
IPC分类号： F25J302
CPC分类号： F25J3/0233 , F25J3/0209 , F25J3/0219 , F25J3/0238 , F25J2200/02 , F25J2200/30 , F25J2200/70 , F25J2200/76 , F25J2200/90 , F25J2205/04 , F25J2210/12 , F25J2220/66 , F25J2235/60 , F25J2240/02 , F25J2245/02 , F25J2290/40 , Y02C10/12
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. In recent years, the preferred method of separating a hydrocarbon gas stream generally includes supplying at least portions of the gas stream to a fractionation tower having at least one reboiler, and often one or more side reboilers, to supply heat to the column by withdrawing and heating some of the tower liquids to produce stripping vapors that separate the more volatile components from the desired components. The reboiler and side reboilers (if any) are typically integrated into the feed stream cooling scheme to provide at least a portion of the refrigeration needed to condense the desired components for subsequent fractionation in the distillation column. In the process disclosed, the tower reboiling scheme is modified to use one or more tower liquid distillation streams from a point higher in the column than is used in the conventional reboiling scheme, providing colder stream(s) for the reboiler(s) that allow more effective cooling of the feed streams and thereby improve the efficiency with which the desired components are recovered. In addition, the tower liquid streams withdrawn from a higher point in the column contain larger quantities of the more volatile components, which when vaporized provide better stripping of undesirable components like carbon dioxide without reducing the recovery of the desired components. The heated distillation stream is returned to a lower point on the fractionation tower that is separated from the withdrawal point by at least one theoretical stage.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 近年来，分离烃气流的优选方法通常包括将气流的至少一部分供应至具有至少一个再沸器的分馏塔，并且通常是一个或多个侧再沸器，以通过抽出和 加热一些塔式液体以产生汽提蒸汽，其将更易挥发的组分与期望的组分分离。 再沸器和侧面再沸器（如果有的话）通常集成到进料流冷却方案中，以提供冷凝所需组分所需的至少一部分制冷剂用于随后在蒸馏塔中分馏。 在所公开的方法中，塔式再沸腾方案被修改为使用一种或多种塔式液体蒸馏物流，其比在常规再沸腾方案中使用的塔中高一点，为再沸器提供较冷的流，其允许 更有效地冷却进料流，从而提高回收所需组分的效率。 此外，从柱中较高点排出的塔液流含有较大量的挥发性较高的组分，当汽化时，会提供更好的汽提不需要的组分如二氧化碳，而不会降低所需组分的回收率。 加热的蒸馏物流返回到分离塔上的一个较低点，其从提取点离开至少一个理论阶段。
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公开(公告)号：US4854955A
公开(公告)日：1989-08-08
申请号：US194878
申请日：1988-05-17
IPC分类号： F25J3/02
CPC分类号： F25J3/0242 , F25J3/0209 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/70 , F25J2200/74 , F25J2200/80 , F25J2205/04 , F25J2210/06 , F25J2235/60 , F25J2240/02 , F25J2245/02 , F25J2270/02 , F25J2270/12 , F25J2270/60 , F25J2280/02 , F25J2290/40
摘要： A process for the recovery of propane and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is divided into first and second streams. The first stream is cooled to condense substantially all of it and is thereafter expanded to the pressure of the distillation column. After expansion, the cooled first stream is directed in heat exchange relation with a warmer distillation stream rising from fractionation stages of the distillation column. The warmed first stream is then supplied to the column at a first mid-column feed position. The second stream is expanded to the column pressure and is then supplied to the column at a second mid-column feed position. The distillation stream is cooled by the first stream sufficiently to partially condense it. The partially condensed distillation stream is then separated to provide volatile residue gas and a reflux stream. The reflux stream is supplied to the column at a top column feed position. The temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the C.sub.3 + components is recovered. Alternatively, control means may be adapted so that the major portion of the C.sub.2 + components is recovered.
摘要翻译： 公开了从烃气流中回收丙烷和较重烃组分的方法。 流被分成第一和第二流。 将第一流冷却至基本上全部冷凝，然后将其膨胀至蒸馏塔的压力。 膨胀后，冷却的第一流与从蒸馏塔的分馏级上升的较热的蒸馏流以热交换关系。 然后将加热的第一流以第一中间柱进料位置供应到塔中。 将第二流扩展到柱压力，然后在第二中间柱进料位置处将其提供给塔。 蒸馏物流被第一流冷却，以使其部分冷凝。 然后分离部分冷凝的蒸馏物流以提供挥发性残余气体和回流物流。 回流在顶部塔进料位置供应到塔中。 进料塔的进料温度有效地将塔顶馏出物温度保持在一个温度，从而C3 +成分的主要部分被回收。 或者，控制装置可以被适配成使得C2 +组件的主要部分被回收。
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公开(公告)号：US5983664A
公开(公告)日：1999-11-16
申请号：US54802
申请日：1998-04-03
CPC分类号： F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/50 , F25J2200/70 , F25J2200/76 , F25J2205/04 , F25J2210/12 , F25J2235/60 , F25J2240/02
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. In recent years, the preferred method of separating a hydrocarbon gas stream generally includes supplying at least a portion of the gas stream to a work expansion device, then directing the work expanded stream to a distillation column at a mid-column feed point below an upper rectification section. The top column feed above the upper rectification section is typically a condensed and subcooled gaseous stream, frequently comprised of a gas stream that would otherwise feed the work expansion device. In the process disclosed, the work expanded stream is further cooled prior to feeding the distillation column at the mid-column feed point, so that a lesser volume of top column feed is required to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 近年来，分离烃气流的优选方法通常包括将至少一部分气体流供应到工作膨胀装置，然后将工作膨胀流引导到蒸馏塔，该蒸馏塔位于上部下方的中间柱进料点 整改部分。 上部精馏段上方的顶部塔进料通常是冷凝的和过冷的气态物流，其通常由气流组成，否则气体将进料工作膨胀装置。 在所公开的方法中，将工作膨胀的料流进一步冷却，然后在中间塔进料点进料蒸馏塔，使得需要较少量的顶部塔进料以将塔顶馏出物温度保持在一定温度， 的所需组分被回收。
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公开(公告)号：US5771712A
公开(公告)日：1998-06-30
申请号：US696114
申请日：1996-08-13
CPC分类号： F25J3/0219 , C07C7/005 , C10G70/041 , F25J3/0209 , F25J3/0233 , F25J3/0242 , F25J2200/04 , F25J2200/70 , F25J2200/74 , F25J2200/78 , F25J2205/04 , F25J2210/12 , F25J2235/60 , F25J2240/02 , F25J2245/02 , F25J2270/04
摘要： A process for the recovery of propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled and/or expanded to partially condense it, then separated to provide a first vapor stream. The first vapor stream is directed into a contacting device whereby a third vapor stream and a C.sub.3 -containing liquid stream are formed. The C.sub.3 -containing liquid stream is directed to a distillation column wherein a second vapor stream is separated to recover a product containing the major portion of the C.sub.3 components and heavier hydrocarbon components. The second vapor stream is directed into heat exchange relation with the third vapor stream to cool the second vapor stream and condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the contacting device to intimately contact the first vapor stream; the remaining portion of the condensed stream is supplied to the distillation column as its top feed. The quantities and temperatures of the feeds to the contacting device and the distillation column are effective to maintain the overhead temperatures of the contacting device and the distillation column at temperatures whereby the major portion of the desired components is recovered.
摘要翻译： 公开了从烃气流中回收丙烷，丙烯和较重烃组分的方法。 将物流冷却和/或膨胀以使其部分冷凝，然后分离以提供第一蒸气流。 将第一蒸气流引导到接触装置中，由此形成第三蒸气流和含C3液体流。 将含有C3的液体物流引导至蒸馏塔，其中第二蒸气流被分离以回收含有主要部分的C3成分和较重的烃成分的产物。 第二蒸气流被引导与第三蒸气流的热交换关系，以冷却第二蒸气流并冷凝其至少一部分，形成冷凝流。 冷凝流的至少一部分被引导到接触装置以紧密接触第一蒸气流; 冷凝流的剩余部分作为其顶部进料供应到蒸馏塔。 进料到接触装置和蒸馏塔的数量和温度有效地将接触装置和蒸馏塔的塔顶温度保持在温度，从而回收所需组分的主要部分。
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公开(公告)号：US5275005A
公开(公告)日：1994-01-04
申请号：US983884
申请日：1992-12-01
CPC分类号： F25J3/0209 , C07C7/005 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/78 , F25J2205/02 , F25J2205/04 , F25J2210/12 , F25J2230/60 , F25J2235/60 , F25J2240/02 , F25J2270/02 , F25J2270/12 , F25J2270/60
摘要： A process for the recovery of C.sub.2 components (ethylene and/or ethane) and heavier hydrocarbon components from a gas stream containing a significant quantity of components more volatile than methane (e.g., hydrogen, nitrogen, and/or others) is disclosed. The cooled, partially condensed hydrocarbon bearing gas stream is separated into a vapor containing substantial quantities of the component(s) more volatile than methane and a liquid containing predominantly hydrocarbons. The vapor is expanded to the distillation column pressure and then supplied to the column at an upper mid-column feed position. The liquid is expanded to column pressure and supplied to the column at a lower mid-column feed position. A recycle stream is withdrawn from the column at a point below the upper mid-column feed position where the bulk of the volatile components are supplied to the column. The recycle stream is compressed and cooled so that a substantial portion is condensed and then supplied to the column as reflux at the top column feed position. The major portion of this reflux is liquid methane which allows the recovery of a significant portion of the C.sub.2 and heavier components that are in the vapors in the upper section of the distillation column. The distillation column overhead vapor contains predominantly methane and the more volatile components The major portion of the desired components is recovered in the distillation column bottom liquid product.
摘要翻译： 公开了一种用于从含有大量甲烷（例如氢，氮和/或其他物质）挥发物的大量组分的气流中回收C2组分（乙烯和/或乙烷）和较重烃组分的方法。 将冷却的部分冷凝的含烃气流分离成含有大量的比甲烷更易挥发的组分和主要含有烃的液体的蒸气。 将蒸气膨胀至蒸馏塔压力，然后在上中间柱进料位置供给塔。 将液体膨胀至柱压，并在较低的中间柱进料位置供应至塔。 在上部中间柱进料位置下方的一个点处将回收物流从柱中取出，其中大部分挥发性组分被供给到塔中。 将再循环物流压缩并冷却，使得大部分被冷凝，然后在顶部塔进料位置作为回流供应到塔中。 该回流的主要部分是液体甲烷，其允许回收蒸馏塔上部蒸气中的大部分C2和较重组分。 蒸馏塔塔顶蒸气主要含有甲烷和更易挥发的组分。所需组分的主要部分在蒸馏塔底液产物中回收。
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公开(公告)号：US4889545A
公开(公告)日：1989-12-26
申请号：US275102
申请日：1988-11-21
CPC分类号： F25J3/0242 , C07C7/04 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/72 , F25J2205/04 , F25J2210/06 , F25J2210/12 , F25J2230/08 , F25J2240/02 , F25J2240/30 , F25J2270/02
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is divided into first and second streams. The first stream is cooled to condense substantially all of it and is thereafter expanded to the fractionation tower pressure. After expansion, the cooled first stream is directed in heat exchange relation with a compressed recycle portion of the fractionation tower overhead. The warmed first stream is then supplied to the fractionation tower at a first mid-column feed position. The second stream is expanded to the tower pressure and is then supplied to the column at a second mid-column feed position. The recycle stream is cooled by the first stream sufficiently to substantially condense it. The substantially condensed recycle stream is then expanded to the pressure of the distillation column and supplied to the column at a top column feed position. The pressure of the recycle stream and the quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 流被分成第一和第二流。 将第一流冷却至基本上全部冷凝，然后将其膨胀至分馏塔压力。 膨胀后，冷却的第一流与分馏塔顶部的压缩再循环部分以热交换关系。 然后将加热后的第一流以第一中柱进料位置供应至分馏塔。 将第二流扩张到塔压力，然后在第二中柱进料位置处供给塔。 再循环流被第一流充分冷却至基本上冷凝。 然后将基本上冷凝的再循环料流膨胀至蒸馏塔的压力，并在顶部塔进料位置供给塔。 再循环料流的压力以及进料塔的进料量和温度对塔顶温度的维持是有效的，从而回收大部分所需组分。
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