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公开(公告)号：US4519825A
公开(公告)日：1985-05-28
申请号：US488328
申请日：1983-04-25
CPC分类号： C07C7/09 , F25J3/0219 , F25J3/0247 , F25J2200/80 , F25J2270/04
摘要： A process is described for separating C.sub.4 + hydrocarbons in high recovery and high purity from a feed gas comprising about 0-5% C.sub.5 and heavier hydrocarbons, 1-10% C.sub.4 hydrocarbons, 0-10% C.sub.3 hydrocarbons, 0-10% C.sub.2 hydrocarbons and the balance CH.sub.4 and light inerts. Efficient separation is effected by using a dephlegmator cycle employing only internal refrigeration.
摘要翻译： 描述了一种从高回收率和高纯度分离含有约0-5％C5和较重烃，1-10％C 4烃，0-10％C 3烃，0-10％C 2烃的进料气体的C4 +烃的方法， 平衡CH4和光惰性物质。 通过使用仅使用内部制冷的分凝器循环来实现有效的分离。
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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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公开(公告)号：US5287703A
公开(公告)日：1994-02-22
申请号：US746671
申请日：1991-08-16
CPC分类号： C07C7/005 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J3/0252 , F25J2200/80 , F25J2210/12 , F25J2270/12 , F25J2270/66
摘要： A process for cooling, phase separating, rectifying and stripping a hydrocarbon containing feed gas stream to recover a heavy hydrocarbon product wherein a predominant amount of the refrigeration for the process is provided from a single loop vapor recompression refrigerator employing a mixed refrigerant.
摘要翻译： 一种用于冷却，相分离，精馏和汽提含烃进料气流以回收重质烃产物的方法，其中用于该方法的主要量的制冷是从采用混合制冷剂的单回路蒸汽再压缩制冷机提供的。
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公开(公告)号：US5596883A
公开(公告)日：1997-01-28
申请号：US538540
申请日：1995-10-03
CPC分类号： C01B3/506 , F25J3/0209 , F25J3/0219 , F25J3/0223 , F25J3/0233 , F25J3/0238 , F25J3/0252 , F25J3/0257 , F25J3/0261 , F25J3/029 , C01B2203/046 , C01B2203/047 , C01B2203/048 , F25J2200/76 , F25J2200/80 , F25J2205/04 , F25J2205/30 , F25J2210/12 , F25J2215/04 , F25J2270/24 , Y10S62/903 , Y10S62/92 , Y10S62/932
摘要： Light components are stripped from a multicomponent liquid feed mixture in a core type plate-fin heat exchanger by heating and partially vaporizing the mixture during downward flow in one of a plurality of multichannel flow passageways in the exchanger. The vapor thus formed flows upward and promotes vaporization of dissolved light components from the liquid to yield a liquid product substantially free of lighter components. The passageways are disposed in indirect heat exchange with one or more additional groups of passageways, and heat for partial vaporization of the downward-flowing liquid feed mixture is provided by indirect heat exchange with a condensing process stream. Alternatively, this heat is provided by a bottoms stream recovered from distillation of the stripped liquid product withdrawn from the core type plate-fin heat exchanger.
摘要翻译： 通过在交换器中的多个多通道流动通道之一的向下流动期间加热和部分蒸发混合物，将轻组分从核心型板翅式热交换器中的多组分液体进料混合物中汽提。 如此形成的蒸气向上流动并促进溶解的光组分从液体中蒸发，得到基本上不含较轻组分的液体产物。 通道与一个或多个另外的通道组进行间接热交换，并且向下流动的液体进料混合物的部分蒸发的热量通过与冷凝过程流的间接热交换来提供。 或者，该热量由从芯型板翅式热交换器抽出的汽提的液体产物的蒸馏中回收的塔底物流提供。
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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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6.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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9.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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