迈特尔膜技术有限公司

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    天然气领域中脱除氮气

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    用氮气分离膜NitroSep™ 从天然气中去除氮气/NITROGEN REMOVAL FROM NATURAL GAS NitroSep™

    1. 详细信息

    问题

    氮气是天然气中常见的杂质,而且很难脱除。氮气的存在降低了天然气的热值,甚至可能使其不适合采用长输管道来销售。只有当天然气中氮气的含量低于特定量(通常在4%~6%)时,才适合采用长输管道来进行输送。在适度规模内,深度冷冻脱氮工艺流程复杂,成本很高。


    NitroSepTM解决方案

    基于NitroSepTM的膜系统是可靠而且经济的解决方案。相比于氮气,膜对甲烷、乙烷和其他烃组分具有更加显著的选择渗透性。因此,它能从原料气中生产满足长输管线可接受的气体和富氮燃气。8%15%氮气的气体被压缩并通过第一组膜组件。渗透相中氮气含量降至4%,将被送到管网中;而富氮的残余气体被送到第二组膜组件,这组模块产生氮气含量为50%的残余气体和氮气含量为10%~20%的渗透气。残余气体将用作燃料,渗透气与进料气体混合,以便进一步回收。


    优点

    ■ 氮气含量降至管网要求(3% 或更低)

    ■ 重烃在产品气中收集

    ■ 安装方便、低成本;系统可在1-2天内安装

    ■ 膜经久耐用,不需要维护

    系统拆迁方便

    Problem
    Nitrogen is a common contaminant in natural gas and is quite difficult to  remove. Nitrogen lowers the BTU value of the gas and makes it unsaleable to  most pipelines. Natural gas will be accepted for transport by pipeline only if it  contains less than a specified amount of nitrogen, typically somewhere  between 4% and 6%.
    Cryogenic nitrogen removal is complex and prohibitively expensive at  modest scale. MTR’s membrane based NitroSep™ system is a proven and economical solution.

    Benefits

    ■  Nitrogen content reduced to pipeline specification (3% or higher)

    ■  Heavy hydrocarbons captured  in the product gas

    ■  Easy, low-cost installation;  system can be installed in 1-2 days

    ■  Membrane unit requires  no maintenance; robust  long-lasting membranes

    ■  System is easily moved from  one location to another