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    • 2. 发明授权
    • Recovery of hydrogen from ammonia synthesis purge gas
    • 从氨合成吹扫气中回收氢气
    • US4380461A
    • 1983-04-19
    • US208940
    • 1980-11-21
    • Alan A. HaslamWieslaw H. IsalskiTerence R. Tomlinson
    • Alan A. HaslamWieslaw H. IsalskiTerence R. Tomlinson
    • F25J3/06F25J3/00
    • F25J3/062F25J3/068F25J2210/06F25J2210/20F25J2245/02F25J2280/02Y10S62/934
    • In a process for the recovery of hydrogen from compressed purge gas withdrawn from a recyling gas stream of an ammonia synthesis wherein the hydrogen is separated from the purge gas by partial condensation at cryogenic temperatures, refrigeration is provided by expanding and evaporating the condensate so formed, and the partial pressure of the expanded condensate is lowered by withdrawing a bleed stream from said uncondensed gas, expanding said bleed stream and injecting it into said expanded condensate, condensation of nitrogen employed to purge the cold box for the cryogenic process is avoided by either injecting into the bleed stream a warmer gas provided from the uncondensed gas and/or the purge gas or expanding the condensate and bleed stream in stages with separate expansion thereof in an initial stage and injection of the bleed stream into the condensate prior to the final stage.
    • 在从氨合成的再生气流中抽出的压缩吹扫气体回收氢气的过程中,其中通过在低温下部分冷凝将氢气与吹扫气体分离,通过膨胀和蒸发形成的冷凝物来提供制冷, 并且通过从所述未冷凝的气体中抽出出口流,膨胀所述排放流并将其注入到所述膨胀的冷凝物中来降低膨胀的冷凝物的分压,通过注入来避免用于清除低温过程的冷箱的氮的冷凝 从未冷凝的气体和/或吹扫气体中提供较热的气体,或者在初始阶段以分离的膨胀步骤逐步扩张冷凝物和排出流,并在最后阶段将排出流注入冷凝物中。
    • 6. 发明授权
    • Low temperature separation of hydrocarbon gas
    • 碳氢化合物气体的低温分离
    • US06581410B1
    • 2003-06-24
    • US09857598
    • 2001-09-04
    • Grant L. JohnsonAdrian J. FinnTerence R. Tomlinson
    • Grant L. JohnsonAdrian J. FinnTerence R. Tomlinson
    • F25J300
    • C07C7/09F25J3/0209F25J3/0219F25J3/0233F25J3/0242F25J2200/04F25J2200/74F25J2200/78F25J2205/02F25J2205/04F25J2210/12F25J2235/60F25J2240/02
    • The invention provides a process for the separation of a heavier hydrocarbon fraction from a gaseous feed comprising a mixture of hydrocarbons, which process comprises subjecting the feed to a first fractionation to form a condensed product; subjecting the condensed product to a second fractionation, at a lower pressure than the first fractionation pressure, to provide the heavier hydrocarbon fraction and distillate fraction; and withdrawing the produced heavier fraction wherein the distillate from the second fractionation is partially condensed to provide reflux streams for both the first and second fractionations. Running the second fractionation at a lower pressure than the first means that there is phased let-down of pressure in two stages, leading to an increased pressure at the suction of the residue gas compressor and reduces power consumption. It also allows more efficient performance of the heat exchanger used to partially condense the reflux streams and simplifies the process, affording opportunities to better integrate process cooling and warming streams so increasing process efficiency. Increasing process efficiency reduces process power requirements or increases recovery of the desired heavier hydrocarbons or realizes both of these effects.
    • 本发明提供了一种从包含烃混合物的气态进料分离较重烃馏分的方法,该方法包括使进料进行第一分馏以形成冷凝产物; 在比第一分馏压力低的压力下使冷凝产物进行第二分馏,以提供较重的烃馏分和馏出馏分; 并且抽出所产生的较重的馏分,其中来自第二分馏的馏出物被部分冷凝以提供第一和第二分馏的回流。 在比第一分压更低的压力下运行第二分馏意味着在两个阶段中分阶段降压,导致在残留气体压缩机抽吸时增加的压力并降低功率消耗。 它还允许用于部分冷凝回流的热交换器的更有效的性能,并且简化了工艺,提供了更好地整合工艺冷却和升温流的机会,从而提高了工艺效率。 提高工艺效率可降低工艺能力要求或提高所需较重碳氢化合物的回收率或实现这两种效果。