Configurations and methods for deep feed gas hydrocarbon dewpointing

Configurations and methods for deep feed gas hydrocarbon dewpointing

  • CN 104,736,504 A
  • Filed: 07/26/2012
  • Published: 06/24/2015
  • Est. Priority Date: 07/26/2012
  • Status: Active Application
First Claim
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1. adjust a method for the hydrocarbon dew point of Sweet natural gas, described Sweet natural gas comprises the component of C3 and C4 and more heavy, and described method comprises:

  • Use the liquid phase of feed gas through cooling and top product cooled feed gas body in feed gas interchanger of fractionation plant epimere;

    In phase separator, the feed gas through cooling is separated into liquid phase and vapor phase;

    By liquid phase feeding in the hypomere of fractionation plant, and vapor phase is fed in the epimere of fractionation plant;

    Wherein the epimere of fractionation plant and hypomere are connected to each other, make (a) expansion gear reduce the pressure of epimere and provide the vapor product of hypomere with the form of two-phase reflux stream to epimere, and (b) pump increase the pressure of hypomere and provide the product liquid of epimere to hypomere;

    The top product of fractionation plant epimere is used to carry out cooled vapor product in the interchanger of top;

    WithWherein run fractionation plant to make from feed gas the rate of recovery of C3 to be 60% to 80%, and be at least 95% to the rate of recovery of C4 and more heavy component from feed gas.

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