迈特尔膜技术有限公司

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    炼油与合成气领域中炼厂气回收C3+或LPG

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    炼厂气升级:从燃气/废气/火炬气中回收LPG 和 H2/REFINERY GAS UPGRADING: LPG AND H2 RECOVERY FROM FUEL/WASTE/FLARE STREAMS

    1. 详细信息

    问题       

    从炼油厂的尾气和燃料气中回收C3及以上的重烃或液化石油气(LPG)比将这些高价值组分直接当燃料更有经济性。许多炼油厂生产过程中都产生LPG,传统工艺采用吸收或深冷来回收LPG。然而,这些技术需要大量的运动部件和/或化学品,并且投资和操作成本很高。VaporSep®则提供了一种简单可行的从炼油厂尾气中回收LPG的方法。

    VaporSep® 方案

    VaporSep®分离系统将两种不同类型的膜组合起来从燃料气中回收LPG和氢气。第一种膜VaporSep-H2TM能够允许氢气从燃料气中渗透出来;接着通过第二种膜VaporSep®来优先渗透LPG组分。LPG作为渗透相经压缩冷凝后以液体形式被回收。

    优点

    ■ 有效和经济的油气回收: 通常进料 LPG的回收率是60~90%,处理液体更容易
    ■ 减少燃烧保持炼厂燃料平衡

    ■ 净化氢回收能产生额外收益
    ■ 可靠性证明:烃和氢气膜系统有几十种
    ■ 膜寿命长
    ■装置简单,可靠,灵活; 易于安装和操作

    ■ 在适中的温度和压力下运行
    ■ 紧凑的撬装结构使安装和操作变得简单

    ■ 不需额外的化学物品,不产生废物

    Problem

    Recovery of heavy hydrocarbons (C3+) or LPG from refinery purge and fuel gas streams is more profitable than sending these high-value components to fuel.  LPG components are produced in many refinery operations. Traditionally, absorption and cryogenic systems have been used for the recovery of LPG. However, these technologies require numerous moving parts and/or external chemicals, and have high capital and operating costs.  VaporSep® offers a simple alternative for recovering LPG from refinery waste streams.

    VaporSep® Solution

    Two different membrane types  can be combined to recover LPG and hydrogen from fuel gas. The first membrane, VaporSep-H2™, permeates purified hydrogen from the fuel gas. The gas is then passed to a VaporSep™ membrane which preferentially permeates LPG components. The permeate is compressed and LPG is recovered as a liquid  in the condenser.

    Benefits

    ■  Efficient and economical  hydrocarbon recovery: typically 60%  to 90% recovery of feed LPG recovery as an easy to handle liquid

    ■  Reduces flaring and corrects  refinery fuel balance

    ■  Recovery of purified hydrogen  can be an added benefit

    ■  Proven performance: dozens of references for both hydrocarbon  and hydrogen membranes

    ■  Long membrane life
    ■  Simple, reliable, flexible unit;  easy to install and operate

    ■  Operates at moderate temperatures and pressures

    ■  Simple installation and operation with compact skid-mounted construction

    ■  Requires no additional chemicals; produces no wastes