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    • 2. 发明授权
    • Process for obtaining highly pure methane from biogas, and plant for carrying out the process
    • 从沼气获得高纯度甲烷的过程,以及用于进行该过程的设备
    • US09309476B2
    • 2016-04-12
    • US14203875
    • 2014-03-11
    • Lukas Graf
    • Lukas Graf
    • B01D53/22C10L3/10C12M1/00
    • C10L3/10B01D53/226B01D2256/245B01D2258/05C10L3/104C10L2290/26C10L2290/46C10L2290/548C10L2290/58C10L2290/60C12M47/18Y02E50/343Y02P20/59
    • A process and a plant for obtaining highly pure methane from biogas where biogas coming from a fermenter is compressed and fed to at least one membrane unit having a selectively permeable membrane, which provides a product gas stream containing an elevated proportion of methane and a gas stream containing a reduced proportion of methane. A quality sensor may be arranged in the outlet line for the highly pure product gas. A vacuum pump, the capacity of which can be regulated, may be connected to the low-pressure side of one of the membrane units. It is controlled by a control unit which receives its input signal from the quality sensor in the outlet line, and if the proportion of methane measured by the quality sensor falls below a certain value, the capacity of the vacuum pump is regulated so that the pressure difference at the membrane increases.
    • 一种用于从生物气中获得高纯度甲烷的方法和设备,其中来自发酵罐的生物气体被压缩并进料至至少一个具有选择性渗透膜的膜单元,其提供含有升高比例的甲烷和气流的产物气流 含甲烷的比例降低。 出口管路中可设置质量传感器,用于高纯度产品气体。 其容量可以调节的真空泵可以连接到膜单元之一的低压侧。 由控制单元控制,该控制单元从出口管线中的质量传感器接收其输入信号,并且如果由质量传感器测量的甲烷的比例低于一定值,则调节真空泵的容量,使得压力 膜的差异增加。