A METHOD TO RECOVER LPG AND CONDENSATES FROM REFINERIES FUEL GAS STREAMS
    4.
    发明公开
    A METHOD TO RECOVER LPG AND CONDENSATES FROM REFINERIES FUEL GAS STREAMS 审中-公开
    工艺回收和液化石油气冷凝液燃料气体炼油厂

    公开(公告)号:EP2847300A4

    公开(公告)日:2017-02-22

    申请号:EP13788222

    申请日:2013-05-10

    IPC分类号: C10G5/06 C01B3/50

    摘要: A method to recover olefins and C2+ fractions from refineries gas streams. The traditional recovery methods employed at refineries are absorption with solvents and cryogenic technology using compression and expansion aided by external refrigeration systems. In contrast to known methods, there is provided first a pre-cooling heat exchanger on a feed line feeding the gas stream to a in-line mixer, secondly by injecting and mixing a stream of LNG to condense the C2+ fractions upstream of the fractionator. The temperature of the gas stream entering the fractionator is monitored downstream of the in-line mixer. A LNG stream is temperature controlled to flow through the injection inlet and mix with the feed gas at a temperature which results in the condensation of the C2+ fractions before entering the fractionator. A LNG reflux stream is temperature controlled to maintain fractionator overhead temperature. The fractionator bottoms temperature is controlled by a circulating reboiler stream.

    摘要翻译: 的方法,以恢复从炼油厂气流烯烃和C2 +馏分。 在炼油厂中所用的传统的回收方法是吸湿用压缩和膨胀由外部制冷系统辅助溶剂和低温技术。 相比于公知的方法中,首先设置在进料管的气体流进料到在线混合器一预冷热交换器,其次通过注入和混合LNG流以冷凝C2 +馏分分馏的上游。 进入分馏塔的气体流的温度被监测的在线混合器的下游。 甲LNG流是温度控制通过注入口流动并与进料混合气在进入精馏塔之前,这导致在C2 +馏分的冷凝的温度。 甲LNG回流物流是温度控制,以保持分馏器塔顶温度。 该分馏器底部温度由循环再沸器流的控制。