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公开(公告)号：US5379597A
公开(公告)日：1995-01-10
申请号：US192024
申请日：1994-02-04
申请人： Lee J. Howard , Howard C. Rowles
发明人： Lee J. Howard , Howard C. Rowles
CPC分类号： F25J3/0233 , C07C7/04 , F25J3/0219 , F25J3/0238 , F25J3/0252 , F25J2200/80 , F25J2210/12 , F25J2215/62 , F25J2270/12 , F25J2270/66 , F25J2270/902
摘要： A closed-loop mixed refrigerant cycle provides efficient low-level refrigeration for recovering ethylene from a mixed gas feed. Compressed mixed refrigerant vapor is condensed at -20.degree. F. to -50.degree. F. and is subcooled to -175.degree. F. to -225.degree. F. by indirect heat exchange with cold H.sub.2, methane, and expander streams from elsewhere in the ethylene plant. A portion of the subcooled refrigerant may be flashed to provide additional subcooling of the main mixed refrigerant stream. Subcooled mixed refrigerant is subsequently flashed to provide very low temperature level refrigeration for feed condensation and demethanizer overhead condenser duties.
摘要翻译： 闭环混合制冷剂循环为混合气体进料回收乙烯提供了有效的低水平制冷。 压缩混合制冷剂蒸气在-20°F至-50°F冷凝，通过与冷H2，甲烷和来自其他地方的膨胀机流进行间接热交换，将其过冷至-175°F至-225°F 乙烯厂。 过冷制冷剂的一部分可以被闪蒸以提供主混合制冷剂流的额外的过冷却。 后冷却的混合制冷剂随后闪蒸，为进料冷凝和脱甲烷塔塔顶冷凝器的任务提供非常低的温度级制冷。
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公开(公告)号：US4720293A
公开(公告)日：1988-01-19
申请号：US43582
申请日：1987-04-28
IPC分类号： B01D3/00 , B01D5/00 , C07C1/00 , C07C7/00 , C07C7/04 , C07C7/09 , C07C11/04 , C07C67/00 , F25J3/02 , F25J1/02
CPC分类号： F25J3/0242 , C07C7/04 , F25J3/0219 , F25J3/0238 , F25J2200/80 , F25J2205/02 , F25J2205/82 , F25J2210/12 , F25J2215/62 , F25J2235/60 , F25J2270/04 , F25J2270/12 , F25J2270/66
摘要： The present invention relates to a process for the recovery of ethylene from a feed gas containing ethane, methane and other light gases, e.g. cracked gas or refinery off-gases, wherein ethylene is condensed in two stages, preferably rectified, and fed to an integrated demethanizer column. Refrigeration for the process is provided by an integrated combination of work expansion of rejected light gases, by vaporization of separated ethane at low partial pressure but high total pressure, and by a mixed refrigerant system. The process results in the separation and purification of ethylene from the feed gas stream while significantly reducing the energy consumption to do so.
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3.发明授权
公开(公告)号：US4496382A
公开(公告)日：1985-01-29
申请号：US477200
申请日：1983-03-21
CPC分类号： F25J5/002 , F25J3/0209 , F25J3/0233 , F25J3/0257 , F28D9/0068 , F25J2200/08 , F25J2200/38 , F25J2200/74 , F25J2220/64 , F25J2270/12 , F25J2270/60 , F25J2270/66 , F25J2290/32 , F25J2290/42 , Y10S62/903 , Y10S62/927
摘要： A method is disclosed for cooling, condensing and subcooling a substantially single component gas stream by passing the gas stream through a heat exchange relationship with a vaporizing multicomponent stream so that carry-up of the condensed liquid phase is maintained without condensed phase backmixing and pot-boiling of the coolant stream is avoided. The single component gas stream is passed through a cold-end up heat exchanger having a serpentine pathway for the gas stream comprising a series of horizontal passes separated by horizontal dividers and alternatingly connected by turnaround passes at each end. The method is particularly applicable to the condensing of a recycle methane stream in a nitrogen rejection process which uses a methane heat pump cycle to provide refrigeration.
摘要翻译： 公开了一种用于通过使气流通过与气化多组分流的热交换关系来冷却，冷凝和过冷基本上单一组分气流的方法，从而保持冷凝液相的携带而不进行冷凝相回混和锅 - 避免了冷却剂流的沸腾。 单组分气流通过具有用于气流的蛇形通道的冷端向上热交换器，其包括由水平分隔器隔开的一系列水平通道，并在每端通过转向通道交替连接。 该方法特别适用于使用甲烷热泵循环以提供制冷的氮排除过程中的再循环甲烷流的冷凝。
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公开(公告)号：US4270940A
公开(公告)日：1981-06-02
申请号：US92894
申请日：1979-11-09
申请人： Howard C. Rowles , Tsun-chiu Tsao
发明人： Howard C. Rowles , Tsun-chiu Tsao
CPC分类号： F25J3/0252 , B01D3/14 , C07C7/04 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J2200/80 , F25J2210/12 , F25J2245/02 , F25J2270/04
摘要： Enhanced recovery of ethane and ethylene from demethanizer overhead is obtained by subjecting the uncondensed vapor effluent from the main reflux condenser to further condensation and accompanying rectification in a dephlegmator and returning the liquid condensate from the dephlegmator to the demethanizer column. One or more of the refrigerants employed in the dephlegmator comprises vapors leaving the dephlegmator and cooled by pressure reduction.
摘要翻译： 通过使来自主回流冷凝器的未冷凝的蒸汽流出物进一步冷凝并在分馏器中进行精馏并将来自分馏塔的液体冷凝物返回到脱甲烷塔中，从脱甲烷塔顶馏出物中提高乙烷和乙烯的回收率。 分凝器中使用的一种或多种制冷剂包括离开分凝器的蒸气并通过减压来冷却。
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公开(公告)号：US5634354A
公开(公告)日：1997-06-03
申请号：US646839
申请日：1996-05-08
申请人： Lee J. Howard , Howard C. Rowles
发明人： Lee J. Howard , Howard C. Rowles
CPC分类号： C10G70/04 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J3/0252 , F25J2200/80 , F25J2205/04 , F25J2205/40 , F25J2205/80 , F25J2210/12 , F25J2230/60 , F25J2245/02 , F25J2270/04 , F25J2270/60 , F25J2290/80
摘要： Olefins are recovered from thermally cracked gas or fluid catalytic cracking off gas by cooling the gas to condense a portion of the hydrocarbons, removing hydrogen from the noncondensed gas, and condensing the remaining hydrocarbons in a cold condensing zone using a dephlegmator which operates above about -166.degree. F. This mode of operation minimizes the amount of methane in the condensate which is further processed in demethanizer column(s) and permits the condensation of ethylene at warmer temperatures than possible using a partial condenser in the cold condensing zone. The use of a dephlegmator at temperatures above about -166.degree. F. minimizes or eliminates the formation and accumulation of unstable nitrogen compounds in the ethylene recovery system. Hydrogen is removed from the noncondensed gas in a process selected from polymeric membrane permeation, adsorptive membrane permeation, or pressure swing adsorption.
摘要翻译： 通过冷却气体以冷凝一部分烃，从非冷凝气体中除去氢气，并将冷凝的冷凝区域中的剩余烃冷凝，使用分馏器操作从高热裂解气体或流体催化裂解气体回收烯烃， 166°F。这种操作模式最大限度地减少了在脱甲烷塔中进一步处理的冷凝物中的甲烷的量，并允许在冷凝区中使用部分冷凝器使乙烯在比可能的温度更高的温度下冷凝。 在高于约-166°F的温度下使用分馏器，可以最大程度地减少或消除乙烯回收系统中不稳定氮化合物的形成和积累。 在选自聚合物膜渗透，吸附膜渗透或变压吸附的方法中，从非冷凝气体中除去氢。
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6.发明授权Low pressure process for C.sub.3.sup.+ liquids recovery from process product gas 失效C3 +液体从工艺产品气体回收的低压过程
公开(公告)号：US4734115A
公开(公告)日：1988-03-29
申请号：US843322
申请日：1986-03-24
申请人： Lee J. Howard , Howard C. Rowles
发明人： Lee J. Howard , Howard C. Rowles
CPC分类号： F25J3/0252 , F25J3/0219 , F25J3/0233 , F25J3/0242 , F25J2200/80 , F25J2210/12 , F25J2260/02 , F25J2270/90
摘要： The invention provides a liquids recovery process useful for the separation and recovery of C.sub.3.sup.+ liquid hydrocarbons from gas mixtures containing high concentrations of lighter components such as are produced by the dehydrogenation of liquefied petroleum gases or by the catalytic cracking of heavy oils. The recovery process employs an absorption refrigeration cycle to supply high level refrigeration to the process; the absorption cycle utilizes low pressure steam or a heated fluid derived from secondary heat recovery of a process flue gas to effect heating in the absorption refrigeration cycle.
摘要翻译： 本发明提供了一种液体回收方法，其用于从含有高浓度较轻组分的气体混合物中分离和回收C3 +液体烃，例如通过液化石油气脱氢生产或通过重油的催化裂化。 回收过程采用吸收制冷循环，为过程提供高水平制冷; 吸收循环使用低压蒸汽或源自工艺烟道气的二次热回收的加热流体，以在吸收制冷循环中实现加热。
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公开(公告)号：US4455158A
公开(公告)日：1984-06-19
申请号：US477561
申请日：1983-03-21
CPC分类号： F25J3/0257 , F25J3/0209 , F25J3/0233 , F25J5/002 , F25J2200/06 , F25J2200/72 , F25J2200/78 , F25J2205/04 , F25J2220/64 , F25J2235/60 , F25J2240/12 , F25J2245/02 , F25J2270/04 , F25J2290/32 , Y10S62/927
摘要： A method is disclosed for cooling a multicomponent gas stream containing variable amounts of the components by passing the gas stream through a heat exchange relationship with a fluid coolant stream so that carry-up of the condensed phase is maintained without condensed phase backmixing over the compositional range of the multicomponent gas stream. The gas stream is cooled by passing it through a cold-end up heat exchanger having a serpentine pathway for the multicomponent gas stream comprising a series of horizontal passes separated by horizontal dividers and alternatingly connected by turnaround passes at each end, the cross-sectional area of at least one horizontal pass nearer the cold-end being less than the cross-sectional area of a horizontal pass nearer the warm-end. The method is particularly applicable to cooling a natural gas feed stream having a variable nitrogen content in a nitrogen rejection process.
摘要翻译： 公开了一种用于通过使气流通过与流体冷却剂流的热交换关系来冷却含有可变量的组分的多组分气流的方法，从而在组合范围内保持冷凝相的携带而不进行冷凝相回混 的多组分气流。 通过使气流通过具有用于多组分气流的蛇形通道的冷端向上热交换器来冷却气流，所述多组分气流包括由水平分隔器隔开的一系列水平通道，并且在每个端部通过周转通道交替地连接，横截面积 至少一个靠近冷端的水平通道小于靠近暖端的水平通道的横截面面积。 该方法特别适用于在氮气排除过程中冷却具有可变氮含量的天然气进料流。
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公开(公告)号：US4270939A
公开(公告)日：1981-06-02
申请号：US64232
申请日：1979-08-06
CPC分类号： F25J3/0285 , C01B3/506 , F25J3/0219 , F25J3/0233 , F25J3/0252 , F25J3/0257 , C01B2203/0465 , C01B2203/047 , C01B2203/048 , F25J2200/80 , F25J2210/12 , F25J2270/02 , F25J2270/04 , Y10S62/934
摘要： Enhanced recovery of the methane content of a multicomponent stream containing lower boiling gas components is obtained by effecting condensation of at least the major portion of the methane content in a dephlegmator wherein separated lower boiling components are employed as indirect heat exchange refrigerants.
摘要翻译： 通过在分馏塔中使用分离的低沸点组分作为间接热交换制冷剂，使至少大部分的甲烷含量在分馏塔中进行冷凝来获得含有较低沸点气体组分的多组分流的甲烷含量的增强的回收。
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公开(公告)号：US5502972A
公开(公告)日：1996-04-02
申请号：US289872
申请日：1994-08-12
申请人： Lee J. Howard , Howard C. Rowles
发明人： Lee J. Howard , Howard C. Rowles
CPC分类号： F25J3/0233 , C07C7/04 , F25J3/0219 , F25J3/0238 , F25J3/0252 , F25J2200/80 , F25J2210/12 , F25J2215/62 , F25J2270/12 , F25J2270/66 , F25J2270/902
摘要： A closed-loop mixed refrigerant cycle provides efficient low-level refrigeration for recovering ethylene from a mixed gas feed. Compressed mixed refrigerant vapor is condensed at -20.degree. F. to -50.degree. F. and is subcooled to -175.degree. F. to -225.degree. F. by indirect heat exchange with cold H.sub.2, methane, and expander streams from elsewhere in the ethylene plant. A portion of the subcooled refrigerant may be flashed to provide additional subcooling of the main mixed refrigerant stream. Subcooled mixed refrigerant is subsequently flashed to provide very low temperature level refrigeration for feed condensation and demethanizer overhead condenser duties. The invention allows advantageous operation of the feed chilling train at pressures between 150 and 400 psia.
摘要翻译： 闭环混合制冷剂循环提供了有效的低水平制冷以从混合气体进料中回收乙烯。 压缩混合制冷剂蒸气在-20°F至-50°F冷凝，通过与冷H2，甲烷和来自其他地方的膨胀机流进行间接热交换，将其过冷至-175°F至-225°F 乙烯厂。 过冷制冷剂的一部分可以被闪蒸以提供主混合制冷剂流的额外的过冷却。 后冷却的混合制冷剂随后闪蒸，为进料冷凝和脱甲烷塔塔顶冷凝器的任务提供非常低的温度级制冷。 本发明允许进料冷却列车在150和400psia之间的压力下的有利操作。
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公开(公告)号：US5497626A
公开(公告)日：1996-03-12
申请号：US289862
申请日：1994-08-12
申请人： Lee J. Howard , Howard C. Rowles
发明人： Lee J. Howard , Howard C. Rowles
CPC分类号： F25J3/0233 , C07C7/04 , F25J3/0219 , F25J3/0238 , F25J3/0252 , F25J2200/80 , F25J2205/04 , F25J2210/12 , F25J2270/02 , F25J2270/04
摘要： Refrigeration is provided in an ethylene recovery plant by an open-loop mixed refrigeration cycle which utilizes components present in the ethylene-containing feed gas as the mixed refrigerant. Refrigeration is provided by subcooled mixed refrigerant at -175.degree. to -225.degree. F. for the demethanizer overhead condenser and for initial cooling and condensation of the ethylene-containing feed gas. Overall ethylene recoveries of up to 99.9% can be achieved at reduced power consumption compared with conventional ethylene recovery cycles. In addition, significant capital savings can be realized due to the simplification of equipment with the open-loop mixed refrigerant cycle, which can be operated advantageously at pressures between 150 and 400 psia.
摘要翻译： 通过开环混合制冷循环在乙烯回收装置中提供制冷，其利用存在于含乙烯进料气体中的组分作为混合制冷剂。 用于脱甲烷塔顶冷凝器的-175°至-225°F的过冷混合制冷剂和含乙烯进料气的初始冷却和冷凝来提供制冷。 与常规乙烯回收循环相比，在降低的功耗下可以实现高达99.9％的总乙烯回收率。 此外，由于简化具有开环混合制冷剂循环的设备，可以有效地在150至400psia之间的压力下有效地运行，可以实现显着的资本节省。
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