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    • 1. 发明申请
    • HYDROCARBON GAS PROCESSING
    • 油气加工
    • WO2008140836A2
    • 2008-11-20
    • PCT/US2008/052154
    • 2008-01-28
    • ORTLOFF ENGINEERS, LTD.PITMAN, Richard, N.WILKINSON, John, D.LYNCH, Joe, T.HUDSON, Hank, M.MARTINEZ, Tony, L.
    • PITMAN, Richard, N.WILKINSON, John, D.LYNCH, Joe, T.HUDSON, Hank, M.MARTINEZ, Tony, L.
    • F25J3/00
    • F25J3/0209F25J3/0233F25J3/0238F25J3/0242F25J2200/02F25J2200/30F25J2200/76F25J2205/04F25J2230/08F25J2230/60F25J2235/60F25J2240/02F25J2245/02F25J2290/40
    • 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 pressure of a fractionation tower 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 A distillation vapor stream is withdrawn from the column below the feed point of the first stream and compressed to an intermediate pressure, and is then directed into heat exchange relation with the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 at a third mid-column feed position located above the feed point of the first stream. A recycle stream is withdrawn from the tower overhead after it has been warmed and compressed. The compressed recycle stream is cooled sufficiently to substantially condense it, and is then expanded to the pressure of the fractionation tower and supplied to the tower at a top column feed position. 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.
    • 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的压力,并以第一中间塔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。 将蒸馏蒸气物流从第一物流的进料点下方的塔中取出并压缩至中间压力,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, 形成冷凝流。 冷凝流的至少一部分在位于第一流的进料点上方的第三中柱进料位置处被引导至分馏塔。 在塔顶被加热和压缩之后,再循环流从塔架塔架中取出。 将压缩的再循环料流充分冷却以使其基本冷凝,然后膨胀至分馏塔的压力,并以顶部塔进料位置供应至塔。 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。