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    炼油与合成气领域中炼油厂氢气回收

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    炼油厂中的氢气提纯/HYDROGEN PURIFICATION IN REFINERIES

    1. 详细信息

    问题

    随着炼油厂加氢处理(为了脱硫等)和加氢裂化(为了将重烃转化为轻质和高品质的燃料)的应用越来越多,炼油厂氢气的需求量也越来越大。这些处理过程的尾气中含有大量带压的没有参加反应的氢气,采用膜分离法可以比较经济地从这些尾气中回收氢气。VaporSep-H2TM能够生产纯度为90%~99%的氢气,氢气回收率高达90%以上。

    VaporSep-H2™ 解决方案

    VaporSep-H2氢气分离系统提供了一种从炼厂气中回收氢气的简单方法。氢气能够优先渗透通过该膜,产生一股氢气纯度高的渗透气和一股碳氢化合物富集的渗余气。提纯后氢气的压力取决于进料条件,最高可达1500psi(约10.34MPa)。碳氢化合物富集的渗余气在接近进料压力的条件下回收,可以直接当作燃料使用或者合适的情况下经处理后用于生产液化石油气(LPG)。

    优点

    ■ 能经济有效地回收氢气:通常回收率为80%~98%,产品纯度90 vol%~99 vol%

    ■ 能处理高达2500 psia(约17.24MPa)的进料压力

    ■ 减少火炬燃烧,调整炼油燃料平衡

    性能优良,膜寿命长,应用案例多

    Problem
    Refinery hydrogen requirements are growing due to the increased use of hydrotreating (to remove sulfur) and hydrocracking (to convert heavy hydrocarbons to lighter, higher-value fuels). Residual gas from these processes contains a significant amount of unused hydrogen at pressure, and membranes provide an economical recovery method. MTR’s hydrogen-permeable VaporSep-H2™ membranes can provide 90% to 99% pure hydrogen and greater than 90% recovery.

    VaporSep-H2

    VaporSep-H2™offers a simple method for recovering hydrogen from refinery streams. Hydrogen permeates preferentially through the membrane, producing a purified hydrogen “permeate” stream and a hydrocarbon-enriched “residue” stream. The available pressure for the purified hydrogen depends on the feed conditions, but can be as high as 1500 psi. The hydrocarbon-enriched “residue” is recovered at close to the feed pressure, and can be sent to directly to fuel, or first treated for liquefied petroleum gas (LPG) recovery if these components have value.

    Benefits

    ■  Efficient and economical hydrogen recovery: typically 80% to 98% recovery of feed H2 with a purity of 90 vol%  to 99 vol%

    ■  Handles high feed pressures  up to 2500 psia

    ■  Reduce flaring and correct  refinery fuel balance

    ■  Proven performance,  long membrane life,  many references