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31. 发明申请

US20080078205A1 Hydrocarbon Gas Processing 审中-公开
标题翻译：烃气处理
公开(公告)号：US20080078205A1
公开(公告)日：2008-04-03
申请号：US11839693
申请日：2007-08-16
申请人： Kyle T. Cuellar , Tony L. Martinez , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson
发明人： Kyle T. Cuellar , Tony L. Martinez , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson
IPC分类号： F25J3/00 , F25J1/00
CPC分类号： F25J3/0209 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/30 , F25J2200/78 , F25J2205/04 , F25J2210/06 , F25J2220/66 , F25J2230/08 , F25J2230/60 , F25J2240/02 , F25J2290/40
摘要： A process and apparatus for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled and divided into first and second streams. The first stream is further 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 A distillation stream is withdrawn from the column below the feed point of the second stream and compressed to higher pressure, and is then directed into heat exchange relation with the tower overhead vapor stream to cool the distillation stream and condense substantially all of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation tower as its top feed. The quantities and temperatures of the feeds to the fractionation tower are effective to maintain the overhead temperature of the fractionation tower at a temperature whereby the major portion of the desired components is recovered. In other embodiments, the distillation stream is withdrawn from the column above the feed point of the second stream.
摘要翻译：公开了一种用于从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法和设备。将流冷却并分成第一和第二流。将第一流进一步冷却以基本上将其全部冷凝，然后将其扩展至分馏塔压力，并以第一中间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。将蒸馏物流从第二物流的进料点下方的塔中取出并压缩至更高的压力，然后与塔顶塔顶蒸气流导热至热交换关系，以冷却蒸馏流并基本上将其冷凝，从而形成冷凝流。冷凝流的至少一部分作为顶部进料被引导至分馏塔。进入分馏塔的进料的量和温度对于将分馏塔的塔顶温度维持在所需组分的主要部分被回收的温度是有效的。在其他实施方案中，蒸馏物流从第二物流的进料点上方的塔中取出。

32. 发明授权

US07191617B2 Hydrocarbon gas processing 有权
标题翻译：烃类气体加工
公开(公告)号：US07191617B2
公开(公告)日：2007-03-20
申请号：US11201358
申请日：2005-08-10
申请人： Kyle T. Cuellar , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson
发明人： Kyle T. Cuellar , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson
IPC分类号： F25J3/00
CPC分类号： F25J3/0233 , F25J3/0209 , F25J3/0238 , F25J3/0242 , F25J2200/02 , F25J2200/04 , F25J2200/30 , F25J2200/50 , F25J2200/70 , F25J2200/74 , F25J2200/78 , F25J2205/02 , F25J2205/04 , F25J2240/02 , F25J2245/02 , F25J2270/12 , F25J2270/60 , F25J2290/40
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 and divided into first and second streams. The first stream is further 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 distillation stream is withdrawn from the column below the feed point of the second stream and is then directed into heat exchange relation with the tower overhead vapor stream to cool the distillation 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 fractionation tower as its top feed. The quantities and temperatures of the feeds to the fractionation tower are effective to maintain the overhead temperature of the fractionation tower 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。将流冷却并分成第一和第二流。将第一流进一步冷却以基本上将其全部冷凝，然后将其扩展至分馏塔压力，并以第一中间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。蒸馏物流从第二料流的进料点下方的塔中取出，然后与塔顶塔顶蒸气流导热至热交换关系，以冷却蒸馏流并冷凝其至少一部分，形成冷凝流。冷凝流的至少一部分作为顶部进料被引导至分馏塔。进入分馏塔的进料的量和温度对于将分馏塔的塔顶温度维持在所需组分的主要部分被回收的温度是有效的。

33. 发明申请

US20100031700A1 Liquefied natural gas and hydrocarbon gas processing 有权
标题翻译：液化天然气和碳氢化合物气体加工
公开(公告)号：US20100031700A1
公开(公告)日：2010-02-11
申请号：US12479061
申请日：2009-06-05
申请人： John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
发明人： John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00
CPC分类号： F25J1/0231 , F25J1/0022 , F25J1/0035 , F25J1/0037 , F25J1/004 , F25J1/0045 , F25J1/0201 , F25J1/023 , F25J1/0232 , F25J3/0209 , F25J3/0233 , F25J2200/02 , F25J2200/72 , F25J2205/04 , F25J2210/06 , F25J2215/02 , F25J2215/04 , F25J2220/64 , F25J2230/60 , F25J2240/02 , F25J2245/02 , F25J2245/90 , F25J2260/10 , F25J2260/60 , F25J2270/02
摘要： A process and an apparatus for liquefying a portion of a natural gas stream are disclosed. The natural gas stream is cooled under pressure and divided into a first stream and a second stream. The first stream is cooled, expanded to an intermediate pressure, and supplied to a lower feed point on a distillation column. The second stream is expanded to the intermediate pressure and divided into two portions. One portion is cooled and then supplied to a mid-column feed point on the distillation column; the other portion is used to cool the first stream. 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, so that the overhead vapor from the distillation column contains essentially only methane and lighter components. This overhead vapor 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：公开了一种用于液化天然气流的一部分的方法和装置。将天然气流在压力下冷却并分成第一流和第二流。将第一流冷却，膨胀至中间压力，并供给到蒸馏塔上的下进料点。将第二流扩展到中间压力并分成两部分。一部分被冷却，然后供应到蒸馏塔上的中间柱进料点; 另一部分用于冷却第一流。来自该蒸馏塔的底部产物优选含有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，使得来自蒸馏塔的塔顶蒸气基本上仅含有甲烷和较轻组分。将该塔顶蒸气冷却并冷凝，并将一部分冷凝流供应至蒸馏塔上的顶部进料点，以作为回流。冷凝流的第二部分膨胀到低压以形成液化的天然气流。

34. 发明申请

US20120000246A9 Liquefied Natural Gas And Hydrocarbon Gas Processing 有权
标题翻译：液化天然气和烃类气体加工
公开(公告)号：US20120000246A9
公开(公告)日：2012-01-05
申请号：US12466669
申请日：2009-05-15
申请人： Tony L. Martinez , John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
发明人： Tony L. Martinez , John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00
CPC分类号： F25J3/0209 , F25J3/0214 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/38 , F25J2200/50 , F25J2200/78 , F25J2205/02 , F25J2205/04 , F25J2210/02 , F25J2210/62 , F25J2230/08 , F25J2230/60 , F25J2235/60 , F25J2240/02 , F25J2245/02 , F25J2270/904 , F25J2290/40
摘要： A process for the recovery of heavier hydrocarbons from a liquefied natural gas (LNG) stream and a hydrocarbon gas stream is disclosed. The LNG feed stream is heated to vaporize at least part of it, then expanded and supplied to a fractionation column at a first mid-column feed position. The gas stream is expanded and cooled, then supplied to the column at a second mid-column feed position. A distillation vapor stream is withdrawn from the fractionation column below the mid-column feed positions and directed in heat exchange relation with the LNG feed stream, cooling the distillation vapor stream as it supplies at least part of the heating of the LNG feed stream. The distillation vapor stream is cooled sufficiently to condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation column as its top feed. A portion of the column overhead stream is also directed in heat exchange relation with the LNG feed stream, so that it also supplies at least part of the heating of the LNG feed stream as it is condensed to form a “lean” LNG stream. 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 the bottom liquid product from the column.
摘要翻译：公开了从液化天然气（LNG）流和烃气流中回收较重烃的方法。加热LNG进料流至少部分蒸发，然后膨胀并在第一中间柱进料位置供应至分馏塔。将气流膨胀并冷却，然后在第二中间柱进料位置供给塔。蒸馏蒸气流从中间塔进料位置以下的分馏塔中排出，并与LNG进料流热交换，并蒸发蒸馏物流，至少部分加热LNG进料流。将蒸馏蒸气流充分冷却以冷凝其至少一部分，形成冷凝流。冷凝流的至少一部分作为其顶部进料被引导至分馏塔。塔顶塔顶物流的一部分也与LNG进料流进行热交换，从而当LNG进料流被冷凝以形成“贫”LNG流时，其还提供LNG进料流的至少一部分加热。进料到塔的数量和温度有效地将塔顶温度维持在一个温度，从而使所需组分的主要部分在塔的底部液体产物中回收。

35. 发明申请

US20110296867A1 Hydrocarbon Gas Processing 有权
标题翻译：烃气处理
公开(公告)号：US20110296867A1
公开(公告)日：2011-12-08
申请号：US13117242
申请日：2011-05-27
申请人： Kyle T. Cuellar , John D. Wilkinson , Hank M. Hudson
发明人： Kyle T. Cuellar , John D. Wilkinson , Hank M. Hudson
IPC分类号： F25J3/00
CPC分类号： F25J3/0266 , F25J3/0209 , F25J3/0219 , F25J3/0223 , F25J3/0233 , F25J3/0252 , F25J2200/02 , F25J2200/70 , F25J2205/02 , F25J2205/04 , F25J2210/12 , F25J2220/82 , F25J2230/08 , F25J2230/60 , F25J2230/80 , F25J2235/80 , F25J2240/02 , F25J2245/02 , F25J2260/80 , F25J2270/02 , F25J2270/12 , Y02C10/04 , Y02C10/12
摘要： A process and an apparatus are disclosed for removing carbon dioxide from a hydrocarbon gas stream. The gas stream is cooled, expanded to intermediate pressure, and supplied to a fractionation tower at a top column feed position. The tower overhead vapor stream is compressed to higher pressure and cooled to partially condense it, forming a condensed stream. The condensed stream is expanded to intermediate pressure, used to subcool a portion of the tower bottom liquid product, then supplied to the tower at a mid-column feed position. The subcooled portion of the tower bottom liquid product is expanded to lower pressure and used to cool the compressed overhead vapor stream. The quantities and temperatures of the feeds to the fractionation tower are effective to maintain the overhead temperature of the fractionation tower at a temperature whereby the major portion of the carbon dioxide is recovered in the tower bottom liquid product.
摘要翻译：公开了从烃气流中除去二氧化碳的方法和装置。将气流冷却，膨胀至中间压力，并在顶部塔进料位置供应至分馏塔。将塔顶塔顶蒸气流压缩至较高压力并冷却以部分地冷凝，形成冷凝流。冷凝的液流膨胀到中间压力，用于过滤塔底液体产物的一部分，然后在中间塔进料位置供应到塔中。将塔底液体产物的过冷部分膨胀至较低压力并用于冷却压缩的塔顶蒸汽流。进入分馏塔的进料的量和温度对于将分馏塔的塔顶温度维持在塔底液体产物中回收大部分二氧化碳的温度是有效的。

36. 发明申请

US20100287982A1 Liquefied Natural Gas and Hydrocarbon Gas Processing 审中-公开
标题翻译：液化天然气和烃气处理
公开(公告)号：US20100287982A1
公开(公告)日：2010-11-18
申请号：US12466661
申请日：2009-05-15
申请人： Tony L. Martinez , John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
发明人： Tony L. Martinez , John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00
CPC分类号： F25J3/0615 , F25J3/0209 , F25J3/0214 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/30 , F25J2200/38 , F25J2200/72 , F25J2200/76 , F25J2205/04 , F25J2210/02 , F25J2210/06 , F25J2210/62 , F25J2230/08 , F25J2230/60 , F25J2235/60 , F25J2240/02 , F25J2270/904 , F25J2290/40 , F25J2290/50
摘要： A process for the recovery of heavier hydrocarbons from a liquefied natural gas (LNG) stream and a hydrocarbon gas stream is disclosed. The LNG feed stream is heated to vaporize at least part of it, then expanded and supplied to a fractionation column at a first mid-column feed position. The gas stream is expanded and cooled, then supplied to the column at a second mid-column feed position. A distillation vapor stream is withdrawn from the fractionation column below the mid-column feed positions and directed in heat exchange relation with the LNG feed stream, cooling the distillation vapor stream as it supplies at least part of the heating of the LNG feed stream. The distillation vapor stream is cooled sufficiently to condense at least a part of it, forming a first condensed stream. At least a portion of the first condensed stream is directed to the fractionation column at an upper mid-column feed position. A portion of the column overhead stream is also directed in heat exchange relation with the LNG feed stream, so that it also supplies at least part of the heating of the LNG feed stream as it is condensed, forming a second condensed stream. The second condensed stream is divided into a “lean” LNG stream and a reflux stream, whereupon the reflux stream is supplied to the column at a top 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 the bottom liquid product from the column.
摘要翻译：公开了从液化天然气（LNG）流和烃气流中回收较重烃的方法。加热LNG进料流至少部分蒸发，然后膨胀并在第一中间柱进料位置供应至分馏塔。将气流膨胀并冷却，然后在第二中间柱进料位置供给塔。蒸馏蒸气流从中间塔进料位置以下的分馏塔中排出，并与LNG进料流热交换，并蒸发蒸馏物流，至少部分加热LNG进料流。蒸馏蒸汽流被充分冷却以冷凝其至少一部分，形成第一冷凝流。至少一部分第一冷凝流在上中间柱进料位置被引导至分馏塔。塔顶馏出物流的一部分也与LNG进料流进行热交换，从而当LNG进料流被冷凝时，其还提供至少部分加热LNG，形成第二冷凝流。将第二冷凝流分为“贫”LNG流和回流流，于此回流在顶塔进料位置供应至塔。进料到塔的数量和温度有效地将塔顶温度维持在一个温度，从而使所需组分的主要部分在塔的底部液体产物中回收。

37. 发明授权

US07631516B2 Liquefied natural gas processing 有权
标题翻译：液化天然气加工
公开(公告)号：US07631516B2
公开(公告)日：2009-12-15
申请号：US11749268
申请日：2007-05-16
申请人： Kyle T. Cuellar , John D. Wilkinson , Hank M. Hudson
发明人： Kyle T. Cuellar , John D. Wilkinson , Hank M. Hudson
IPC分类号： F25J3/00
CPC分类号： F25J3/0233 , F25J3/0214 , F25J3/0238 , F25J2200/02 , F25J2200/76 , F25J2205/04 , F25J2210/06 , F25J2230/08 , F25J2230/60 , F25J2235/60 , F25J2240/02
摘要： A process and apparatus for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbons from a liquefied natural gas (LNG) stream is disclosed. The LNG feed stream is divided into two portions. The first portion is supplied to a fractionation column at an upper mid-column feed point. The second portion is directed in heat exchange relation with a warmer distillation stream rising from the fractionation stages of the column, whereby this portion of the LNG feed stream is partially vaporized and the distillation stream is totally condensed. The condensed distillation stream is divided into a “lean” LNG product stream and a reflux stream, whereupon the reflux stream is supplied to the column at a top column feed position. The partially vaporized portion of the LNG feed stream is separated into vapor and liquid streams which are thereafter supplied to the column at lower mid-column feed positions. 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 the bottom liquid product from the column.
摘要翻译：公开了一种用于从液化天然气（LNG）流中回收乙烷，乙烯，丙烷，丙烯和较重烃的方法和装置。 LNG进料流分为两部分。将第一部分供应到上中间列进料点的分馏塔。第二部分与从塔的分馏级上升的较热的蒸馏物流进行热交换，由此这部分LNG进料流部分蒸发，蒸馏物流完全冷凝。冷凝的蒸馏物流被分成“贫”LNG产物流和回流物流，于是在顶塔进料位置将回流流供给塔。 LNG进料流的部分蒸发部分被分离成蒸汽和液体物流，然后在较低的中间塔进料位置将其送入塔中。进料到塔的数量和温度有效地将塔顶温度维持在一个温度，从而使所需组分的主要部分在塔的底部液体产物中回收。

38. 发明申请

US20090282865A1 Liquefied Natural Gas and Hydrocarbon Gas Processing 审中-公开
标题翻译：液化天然气和烃气处理
公开(公告)号：US20090282865A1
公开(公告)日：2009-11-19
申请号：US12423306
申请日：2009-04-14
申请人： Tony L. Martinez , John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
发明人： Tony L. Martinez , John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00
CPC分类号： F25J3/0209 , F25J3/0214 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/38 , F25J2200/72 , F25J2200/76 , F25J2200/78 , F25J2205/04 , F25J2210/02 , F25J2210/06 , F25J2210/62 , F25J2230/08 , F25J2230/60 , F25J2235/60 , F25J2240/02 , F25J2270/904 , F25J2290/50
摘要： A process for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbons from a liquefied natural gas (LNG) stream and a hydrocarbon gas stream is disclosed. The LNG feed stream is divided into two portions. The first portion is supplied to a fractionation column at a first upper mid-column feed point. The second portion is directed in heat exchange relation with a first portion of a warmer distillation stream rising from the fractionation stages of the column, whereby the LNG feed stream is partially heated and the distillation stream is totally condensed. The condensed distillation stream is divided into a “lean” LNG stream and a reflux stream, whereupon the reflux stream is supplied to the column at a top column feed position. The second portion of the LNG feed stream is heated further to partially or totally vaporize it and thereafter supplied to the column at a first lower mid-column feed position. The gas stream is divided into two portions. The second portion is expanded to the operating pressure of the column, then both portions are directed in heat exchange relation with the lean LNG stream and the second portion of the warmer distillation stream, whereby both portions of the gas stream are cooled, the lean LNG stream is vaporized, and the second portion of the distillation stream is heated. The first portion of the gas stream, which has been cooled to substantial condensation, is supplied to the column at a second upper mid-column feed point, and the second portion is supplied to the column at a second lower mid-column feed point. 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 the bottom liquid product from the column.
摘要翻译：公开了从液化天然气（LNG）流和烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃的方法。 LNG进料流分为两部分。将第一部分供应到第一上中柱供料点的分馏塔。第二部分与来自塔的分馏级的较高蒸馏流的第一部分进行热交换，由此LNG进料流被部分加热并且蒸馏流完全冷凝。冷凝的蒸馏物流被分成“贫”LNG物流和回流物流，然后在顶部塔进料位置将回流物流供给到塔中。 LNG进料流的第二部分被进一步加热以使其部分或全部蒸发，然后在第一较低的中间塔进料位置处供给塔。气流被分成两部分。将第二部分扩展到塔的操作压力，然后两部分与贫LNG流和较冷蒸馏流的第二部分以热交换关系引导，由此气流的两部分被冷却，贫LNG 气流被蒸发，并且蒸馏流的第二部分被加热。已经被冷却至大量冷凝的气流的第一部分在第二上部中间列进料点处供应到塔中，并且第二部分在第二较低的中间列进料点处供应到塔中。进料到塔的数量和温度有效地将塔顶温度维持在一个温度，从而使所需组分的主要部分在塔的底部液体产物中回收。

39. 发明授权

US08434325B2 Liquefied natural gas and hydrocarbon gas processing 有权
标题翻译：液化天然气和碳氢化合物气体加工
公开(公告)号：US08434325B2
公开(公告)日：2013-05-07
申请号：US12466669
申请日：2009-05-15
申请人： Tony L. Martinez , John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
发明人： Tony L. Martinez , John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00 , F17C9/02
CPC分类号： F25J3/0209 , F25J3/0214 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/38 , F25J2200/50 , F25J2200/78 , F25J2205/02 , F25J2205/04 , F25J2210/02 , F25J2210/62 , F25J2230/08 , F25J2230/60 , F25J2235/60 , F25J2240/02 , F25J2245/02 , F25J2270/904 , F25J2290/40
摘要： A process for the recovery of heavier hydrocarbons from a liquefied natural gas (LNG) stream and a hydrocarbon gas stream is disclosed. The LNG feed stream is heated to vaporize at least part of it, then expanded and supplied to a fractionation column at a first mid-column feed position. The gas stream is expanded and cooled, then supplied to the column at a second mid-column feed position. A distillation vapor stream is withdrawn from the fractionation column below the mid-column feed positions and directed in heat exchange relation with the LNG feed stream, cooling the distillation vapor stream as it supplies at least part of the heating of the LNG feed stream. The distillation vapor stream is cooled sufficiently to condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation column as its top feed. A portion of the column overhead stream is also directed in heat exchange relation with the LNG feed stream, so that it also supplies at least part of the heating of the LNG feed stream as it is condensed to form a “lean” LNG stream. 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 the bottom liquid product from the column.
摘要翻译：公开了从液化天然气（LNG）流和烃气流中回收较重烃的方法。加热LNG进料流至少部分蒸发，然后膨胀并在第一中间柱进料位置供应至分馏塔。将气流膨胀并冷却，然后在第二中间柱进料位置供给塔。蒸馏蒸气流从中间塔进料位置以下的分馏塔中排出，并与LNG进料流热交换，并蒸发蒸馏物流，至少部分加热LNG进料流。将蒸馏蒸气流充分冷却以冷凝其至少一部分，形成冷凝流。冷凝流的至少一部分作为其顶部进料被引导至分馏塔。塔顶塔顶物流的一部分也与LNG进料流进行热交换，从而当LNG进料流被冷凝以形成“贫”LNG流时，其还提供LNG进料流的至少一部分加热。进料到塔的数量和温度有效地将塔顶温度维持在一个温度，从而使所需组分的主要部分在塔的底部液体产物中回收。

40. 发明申请

US20110120183A9 Liquefied natural gas and hydrocarbon gas processing 有权
标题翻译：液化天然气和碳氢化合物气体加工
公开(公告)号：US20110120183A9
公开(公告)日：2011-05-26
申请号：US12479061
申请日：2009-06-05
申请人： John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
发明人： John D. Wilkinson , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00
CPC分类号： F25J1/0231 , F25J1/0022 , F25J1/0035 , F25J1/0037 , F25J1/004 , F25J1/0045 , F25J1/0201 , F25J1/023 , F25J1/0232 , F25J3/0209 , F25J3/0233 , F25J2200/02 , F25J2200/72 , F25J2205/04 , F25J2210/06 , F25J2215/02 , F25J2215/04 , F25J2220/64 , F25J2230/60 , F25J2240/02 , F25J2245/02 , F25J2245/90 , F25J2260/10 , F25J2260/60 , F25J2270/02
摘要： A process and an apparatus for liquefying a portion of a natural gas stream are disclosed. The natural gas stream is cooled under pressure and divided into a first stream and a second stream. The first stream is cooled, expanded to an intermediate pressure, and supplied to a lower feed point on a distillation column. The second stream is expanded to the intermediate pressure and divided into two portions. One portion is cooled and then supplied to a mid-column feed point on the distillation column; the other portion is used to cool the first stream. 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, so that the overhead vapor from the distillation column contains essentially only methane and lighter components. This overhead vapor 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：公开了一种用于液化天然气流的一部分的方法和装置。将天然气流在压力下冷却并分成第一流和第二流。将第一流冷却，膨胀至中间压力，并供给到蒸馏塔上的下进料点。将第二流扩展到中间压力并分成两部分。一部分被冷却，然后供应到蒸馏塔上的中间柱进料点; 另一部分用于冷却第一流。来自该蒸馏塔的底部产物优选含有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，使得来自蒸馏塔的塔顶蒸气基本上仅含有甲烷和较轻组分。将该塔顶蒸气冷却并冷凝，并将一部分冷凝流供应至蒸馏塔上的顶部进料点，以作为回流。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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