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Oxyfuel Process For Hard-coal Power Plants With Co_2 Removal

机译：去除Co_2的硬煤电厂的含氧燃料工艺

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摘要

The Oxyfuel process is one of the promising options for carbon capture and storage from fossil fuel power plants. It is based on the approved steam power process and therefore will profit from its high reliability and efficiency. The Oxyfuel process proposes the combustion of coal in an atmosphere of oxygen and recirculated flue gas, and will provide a flue gas containing up to 90 vol % of CO_2. By means of a cryogenic liquefaction, a CO_2 stream with a purity of almost 99% can be obtained. However, the implementation of the Oxyfuel process and other CCS technologies is dependent on legal matters concerning the amount of impurities allowed for the storage sites. The additional units, such as the air separation unit and the CO_2 separation plant, will have a considerable power demand, leading to an efficiency drop of more than ten percentage points. This efficiency loss can be reduced to approximately eight percentage points by an optimized process leading to a net electrical efficiency of 38% compared to the reference plant with 46%.
机译：Oxyfuel工艺是从化石燃料发电厂进行碳捕集与封存的有前途的选择之一。它基于批准的蒸汽动力工艺，因此将因其高可靠性和高效率而受益。 Oxyfuel工艺建议在氧气和再循环烟气气氛中燃烧煤炭，并提供一种烟气，其中烟气中的CO_2含量最高为90vol％。通过低温液化，可以获得纯度几乎为99％的CO 2流。但是，Oxyfuel工艺和其他CCS技术的实施取决于有关存储地点允许的杂质含量的法律事项。额外的单元，例如空气分离单元和CO_2分离设备，将具有相当大的电力需求，从而导致效率下降超过十个百分点。通过优化的工艺可以将效率损失降低到大约八个百分点，从而导致净电效率为38％，而参考工厂为46％。

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