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1. 发明授权

US6062041A Method for liquefying natural gas 失效
标题翻译：液化天然气的方法
公开(公告)号：US6062041A
公开(公告)日：2000-05-16
申请号：US974824
申请日：1997-11-20
申请人： Yoshitsugi Kikkawa , Osamu Yamamoto , Moritaka Nakamura , Shigeru Sugiyama , Yasuharu Fukuda
发明人： Yoshitsugi Kikkawa , Osamu Yamamoto , Moritaka Nakamura , Shigeru Sugiyama , Yasuharu Fukuda
IPC分类号： F25B9/06 , C10L3/00 , C10L10/14 , F25J1/02 , F25J1/00
CPC分类号： F25J1/0022 , F25J1/0035 , F25J1/004 , F25J1/0052 , F25J1/0085 , F25J1/0087 , F25J1/021 , F25J1/0219 , F25J1/0288 , F25J1/0294 , F25J2220/62 , F25J2240/40 , F25J2245/02 , F25J2270/06 , F25J2290/10 , F25J2290/32
摘要： Provided is a method for liquefying natural gas which can be applied to LNG plants of a wide range of capacity and can produce LNG both efficiently and economically. Feed gas of natural gas or a non-liquefied component of recycle gas which is produced during a process of liquefying natural gas is liquefied by using a first refrigerant, for instant consisting of a C3 refrigerant, and a second refrigerant which is different from the first refrigerant, for instance consisting of a C2 refrigerant, in a stepwise fashion. The flow is then liquefied by a substantially isentropic expansion process. The non-liquefied component remaining from this expansion process is then pressurized by a compressor, and combined with the non-liquefied component of the natural gas for recycling the combined flow. The compressor is driven by power obtained from the substantially isentropic expansion process.
摘要翻译：提供了一种液化天然气的方法，其可以应用于具有广泛容量的LNG装置，并且可以有效和经济地生产LNG。天然气的进料气体或在液化天然气的过程中产生的再循环气体的非液化组分通过使用由C3制冷剂构成的第一制冷剂和与第一制冷剂不同的第二制冷剂而液化制冷剂，例如由C2制冷剂组成，以逐步方式。然后通过基本上等熵膨胀过程将流体液化。然后从该膨胀过程中残留的非液化组分被压缩机加压，并与天然气的非液化组分合并，以再循环组合流。压缩机由基本上等熵膨胀过程获得的功率驱动。

2. 发明申请

US20090130009A1 METHOD OF REMOVING SULFUR COMPOUNDS FROM NATURAL GAS 有权
标题翻译：从天然气中去除硫化合物的方法
公开(公告)号：US20090130009A1
公开(公告)日：2009-05-21
申请号：US11995038
申请日：2006-06-27
申请人： Yoshitsugi Kikkawa , Noriyoshi Nozawa , Hiroshi Inoue , Etsuro Sato
发明人： Yoshitsugi Kikkawa , Noriyoshi Nozawa , Hiroshi Inoue , Etsuro Sato
IPC分类号： B01D53/14
CPC分类号： C10L3/10 , B01D53/04 , B01D53/1462 , B01D53/75 , B01D53/8606 , B01D2253/108 , B01D2255/20761 , B01D2255/20769 , B01D2257/304 , B01D2257/306 , B01D2257/504 , B01D2258/06 , C01B17/0408 , C01B17/16 , C10L3/102 , Y02C10/06 , Y02C10/08 , Y02P20/152
摘要： All sulfur compounds can be efficiently removed from natural gas that contains hydrogen sulfide and other sulfur compounds such as mercaptan without using physical absorption. The process comprises an absorption step of treating natural gas by means of a chemical absorption method using an amine-containing solution to mainly remove hydrogen sulfide and carbon dioxide, an adsorption step of flowing the natural gas from the absorption step through a packed bed of a molecular sieve to mainly remove mercaptan, a recovery step of recovering sulfur compounds by converting the hydrogen sulfide removed in the absorption step into sulfur by means of the Claus process, a regeneration step of desorbing the mercaptan adsorbed on the molecular sieve in the adsorption step using heated gas and a reaction step of converting the mercaptan in the regeneration exhaust gas exhausted from the regeneration step into hydrogen sulfide. The reaction step is conducted by injecting steam or water at a ratio of H2O/S=1 to 5 (molar ratio) relative to the sulfur in the regeneration exhaust gas in the presence of a catalyst under the conditions of a temperature level of 250 to 400° C. and a pressure level of 1 to 10 MPa.
摘要翻译：所有硫化合物可以从不含物理吸收的含硫化氢和其他硫化合物如硫醇的天然气中有效地除去。该方法包括通过使用含胺溶液主要除去硫化氢和二氧化碳的化学吸附法处理天然气的吸收步骤，使吸收步骤中的天然气从吸收步骤流过的吸附步骤分子筛，主要去除硫醇，通过克劳斯方法将吸收步骤中除去的硫化氢转化成硫，回收硫化合物的回收步骤，使用吸附步骤中吸附在分子筛上的硫醇的再生步骤，使用将从再生步骤排出的再生废气中的硫醇转化为硫化氢的反应工序。反应步骤是通过在催化剂存在下，在温度水平为250〜25℃的条件下，以相对于再生废气中的硫的H 2 O / S = 1〜5（摩尔比）的比例，注入蒸汽或水 400℃，压力水平为1〜10MPa。

3. 发明授权

US5365740A Refrigeration system for a natural gas liquefaction process 失效
标题翻译：天然气液化过程制冷系统
公开(公告)号：US5365740A
公开(公告)日：1994-11-22
申请号：US28479
申请日：1993-03-08
申请人： Yoshitsugi Kikkawa , Osamu Yamamoto , Kenrou Ohmori , Motohiro Ohmori , Noriyoshi Nozawa
发明人： Yoshitsugi Kikkawa , Osamu Yamamoto , Kenrou Ohmori , Motohiro Ohmori , Noriyoshi Nozawa
IPC分类号： C09K5/08 , C10L3/00 , C10L3/12 , F25D9/00 , F25J1/00 , F25J1/02 , F25J3/00 , F25J3/06
CPC分类号： F25J1/0055 , F25J1/0022 , F25J1/0052 , F25J1/0087 , F25J1/0216 , F25J1/0262 , F25J1/0265 , F25J1/0267 , F25J1/0272 , F25J1/0282 , F25J1/0292 , F25J5/002 , F25J5/005 , F25J2205/02 , F25J2220/62 , F25J2220/64 , F25J2230/60 , F25J2245/02 , F25J2250/02 , F25J2290/32 , F25J2290/50 , Y10S62/903
摘要： Provided is an improved refrigeration system for pre-cooling natural gas or cooling a mixed refrigerant for natural gas liquefaction in a propane refrigeration process widely used for the liquefaction of natural gas. The system comprises a plurality of plate-fin heat exchangers preferably arranged in a parallel relationship for passing a propane refrigerant as a vertical flow and pre-cooling natural gas or cooling a mixed refrigerant for liquefying natural gas, and a thermo siphon drum for the propane refrigerant consisting of a horizontally disposed, laterally elongated tank. Because the passages of the heat exchanger for the natural gas or the mixed refrigerant extend over their entire length in mutually separate relationship, even when the propane refrigerant, the natural gas or the mixed refrigerant is in both gas and liquid phases, a high efficiency of heat transfer can be attained, and the size of the heat exchanger can be reduced. In particular, from an economic view point, it is preferable if the thermo siphon drum serves also as a flash tank.
摘要翻译：提供一种改进的用于预冷天然气或在用于天然气液化的丙烷制冷过程中冷却用于天然气液化的混合制冷剂的制冷系统。该系统包括多个板翅式热交换器，优选以平行关系布置，用于使作为垂直流的丙烷制冷剂和预冷天然气或冷却用于液化天然气的混合制冷剂，以及用于丙烷的热虹吸鼓由水平布置的横向细长的罐组成的制冷剂。由于用于天然气或混合制冷剂的热交换器的通道以相互分离的关系在其整个长度上延伸，所以即使当丙烷制冷剂，天然气或混合制冷剂都处于气相和液相时，其效率也高可以实现热传递，并且可以减小热交换器的尺寸。特别地，从经济的观点来看，优选的是，热虹吸筒也用作闪蒸罐。

4. 发明授权

US5363655A Method for liquefying natural gas 失效
标题翻译：液化天然气的方法
公开(公告)号：US5363655A
公开(公告)日：1994-11-15
申请号：US28025
申请日：1993-03-08
申请人： Yoshitsugi Kikkawa , Osamu Yamamoto , Junichi Sakaguchi , Moritaka Nakamura
发明人： Yoshitsugi Kikkawa , Osamu Yamamoto , Junichi Sakaguchi , Moritaka Nakamura
IPC分类号： F25B11/02 , F25J1/00 , F25J1/02
CPC分类号： F25J1/0278 , F25J1/0022 , F25J1/0035 , F25J1/0037 , F25J1/004 , F25J1/0055 , F25J1/0219 , F25J1/0231 , F25J1/0285 , F25J1/0288 , F25J1/0291 , F25J1/0294 , F25J2205/02 , F25J2210/06 , F25J2220/62 , F25J2220/64 , F25J2230/60 , F25J2235/60 , F25J2240/40
摘要： Provided is a method for liquefying natural gas which can be readily adapted to LNG plants of all sizes without requiring expensive and special heat exchangers. The liquefaction of feed gas of natural gas and recycle natural gas is carried out with a single-component refrigerant or a mixed refrigerant in a high temperature stage, and with a substantially isentropic expansion in a low temperature stage, and a non-liquefied part of the recycle gas after the expansion step is pressurized with a compressor and recycled along with a recycle stream of non-liquefied par of the feed natural gas, the liquefied part by the refrigerant exchanging heat with the non-liquefied part stream produced from the substantially isentropic expansion, in a plate-fin heat exchanger or the like. The compressor is driven by the power obtained by the substantially isentropic expansion.
摘要翻译：提供了一种液化天然气的方法，其可以容易地适应于各种尺寸的LNG装置，而不需要昂贵和特殊的热交换器。天然气和再循环天然气进料气体的液化是在高温阶段用单组分制冷剂或混合制冷剂进行的，而在低温阶段则基本上是等熵膨胀，而非液化部分膨胀步骤后的再循环气体用压缩机加压并与进料天然气的非液化标准的再循环流一起再循环，该液化部分由与基本上等熵生成的非液化部件流进行热交换在板翅式热交换器等中膨胀。压缩机由基本上等熵膨胀获得的功率驱动。

5. 发明授权

US07780933B2 Method of removing sulfur compounds from natural gas 有权
标题翻译：从天然气中除去硫化合物的方法
公开(公告)号：US07780933B2
公开(公告)日：2010-08-24
申请号：US11995038
申请日：2006-06-27
申请人： Yoshitsugi Kikkawa , Noriyoshi Nozawa , Hiroshi Inoue , Etsuro Sato
发明人： Yoshitsugi Kikkawa , Noriyoshi Nozawa , Hiroshi Inoue , Etsuro Sato
IPC分类号： C01B17/16 , C10L3/10
CPC分类号： C10L3/10 , B01D53/04 , B01D53/1462 , B01D53/75 , B01D53/8606 , B01D2253/108 , B01D2255/20761 , B01D2255/20769 , B01D2257/304 , B01D2257/306 , B01D2257/504 , B01D2258/06 , C01B17/0408 , C01B17/16 , C10L3/102 , Y02C10/06 , Y02C10/08 , Y02P20/152
摘要： All sulfur compounds can be efficiently removed from natural gas that contains hydrogen sulfide and other sulfur compounds such as mercaptan without using physical absorption. The process comprises an absorption step of treating natural gas by means of a chemical absorption method using an amine-containing solution to mainly remove hydrogen sulfide and carbon dioxide, an adsorption step of flowing the natural gas from the absorption step through a packed bed of a molecular sieve to mainly remove mercaptan, a recovery step of recovering sulfur compounds by converting the hydrogen sulfide removed in the absorption step into sulfur by means of the Claus process, a regeneration step of desorbing the mercaptan adsorbed on the molecular sieve in the adsorption step using heated gas and a reaction step of converting the mercaptan in the regeneration exhaust gas exhausted from the regeneration step into hydrogen sulfide. The reaction step is conducted by injecting steam or water at a ratio of H2O/S=1 to 5 (molar ratio) relative to the sulfur in the regeneration exhaust gas in the presence of a catalyst under the conditions of a temperature level of 250 to 400° C. and a pressure level of 1 to 10 MPa.
摘要翻译：所有硫化合物可以从不含物理吸收的含硫化氢和其他硫化合物如硫醇的天然气中有效地除去。该方法包括通过使用含胺溶液主要除去硫化氢和二氧化碳的化学吸附法处理天然气的吸收步骤，使吸收步骤中的天然气从吸收步骤流过的吸附步骤分子筛，主要去除硫醇，通过克劳斯方法将吸收步骤中除去的硫化氢转化成硫，回收硫化合物的回收步骤，使用吸附步骤中吸附在分子筛上的硫醇的再生步骤，使用将从再生步骤排出的再生废气中的硫醇转化为硫化氢的反应工序。反应步骤是通过在催化剂存在下，在温度水平为250〜25℃的条件下，以相对于再生废气中的硫的H 2 O / S = 1〜5（摩尔比）的比例，注入蒸汽或水 400℃，压力水平为1〜10MPa。

6. 发明授权

US5689141A Compressor drive system for a natural gas liquefaction plant having an electric motor generator to feed excess power to the main power source 失效
标题翻译：一种用于天然气液化装置的压缩机驱动系统，其具有电动发电机以向主电源供给过量电力
公开(公告)号：US5689141A
公开(公告)日：1997-11-18
申请号：US458322
申请日：1995-06-06
申请人： Yoshitsugi Kikkawa , Osamu Yamamoto , Yasuhiro Naito , Junichi Sakaguchi
发明人： Yoshitsugi Kikkawa , Osamu Yamamoto , Yasuhiro Naito , Junichi Sakaguchi
IPC分类号： F25B11/02 , F01D15/10 , F25B7/00 , F25B11/00 , F25J1/02 , F25J3/04 , F02C6/00 , F25J3/00
CPC分类号： F01D15/10 , F25B11/00 , F25B7/00 , F25J1/0022 , F25J1/0052 , F25J1/0055 , F25J1/0216 , F25J1/0247 , F25J1/0283 , F25J1/0287 , F25J1/0292 , F25J1/0298 , F25J2220/64 , F25J2280/10
摘要： In a compressor drive system for a natural gas liquefaction plant including a plurality of gas turbines each provided in an individual refrigeration cycle for pressurizing a different refrigerant, an electric motor is provided for each of the gas turbines so as to serve both as an auxiliary electric motor for generating a startup torque and as an AC generator, and the excess output power of the gas turbine is converted into electric power by this electric motor when the power requirement of the associated compressor is less than the power output of the gas turbine. Additionally, at least two of the gas turbines are of an identical make which is suitable for driving the compressor of one of the associated refrigeration cycles requiring a larger driving power. Therefore, the gas turbines can be operated at optimum conditions at all times without regard to seasonal changes of the operating conditions, and the efficient operation of the gas turbines will result in a significant reduction in the operation costs through a substantial saving of fuel consumption. Moreover, any excess power output of one of the gas turbines can be allocated so as to reduce the burden of the in-plant power station and/or to supplement the shortage of the power output of the other gas turbine, and the management of the stand-by units and spare parts can be simplified. These factors have a compounded effect in reducing the investment costs of the plant.
摘要翻译：在包括多个燃气轮机的天然气液化装置的压缩机驱动系统中，每个燃气轮机分别设置在用于对不同制冷剂进行加压的个别制冷循环中，为每个燃气轮机设置电动马达，以作为辅助电动机用于产生起动转矩的电动机和作为交流发电机的电动机，并且当相关联的压缩机的功率需求小于燃气轮机的功率输出时，燃气轮机的过量输出功率被该电动机转换成电力。此外，至少两个燃气涡轮机具有相同的功能，其适合于驱动相关制冷循环中的一个的压缩机，需要更大的驱动功率。因此，燃气轮机可以始终在最佳条件下运行，而不考虑运行条件的季节性变化，燃气轮机的有效运行将大大节省燃料消耗，从而显着降低运行成本。此外，可以分配一个燃气轮机的任何多余的功率输出，以便减少工厂内电站的负担和/或补充另一燃气轮机的功率输出的不足，以及管理备用单元和备件可以简化。这些因素在降低工厂的投资成本方面具有复合效应。

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