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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Design and economic analysis of natural gas hydrate regasification process combined with LNG receiving terminal
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Design and economic analysis of natural gas hydrate regasification process combined with LNG receiving terminal

机译：天然气水合物再气化与LNG接收站结合的设计与经济分析

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摘要

In this study, natural gas hydrate (NGH) regasification process combined with liquefied natural gas (LNG) receiving terminal is designed. Since NGH contains excess water, the process needs a dehydration step to avoid reproduction of hydrate in the pipelines. As a method for dehydrating NGH, the enhanced dew point shift is chosen, and the last water specification is achieved by mixing with a LNG stream, which contains negligible water. To cool down the compressed NGH stream, the cryogenic energy of LNG receiving terminal is used. After designing the NGH regasification process, the economic analysis is carried out according to the shipping distance, type of refrigerant, capacity of carrier, and mixing ratio of NGH over LNG. Then, comparison between the conventional LNG chain to the proposed chain that utilizes both LNG and NGH is made. When the quantity of regasified natural gas is fixed at 3.7 million metric tons per year (MTPA), the proposed chain is able to reduce the total chain cost by up to 10.6% compared to the conventional LNG chain in the case of natural gas (NG) delivery to South Korea. Lastly, the risk on investment with respect to the NG liquefaction cost is conducted. According to this, as the shipping distance increases, the risk of the proposed chain decreases. (C) 2016 Published by Elsevier B.V. on behalf of Institution of Chemical Engineers.
机译：在这项研究中，设计了天然气水合物（NGH）的再气化工艺与液化天然气（LNG）接收终端的结合。由于NGH中含有过量的水，因此该过程需要一个脱水步骤，以避免管道中水合物的繁殖。作为使NGH脱水的方法，选择增强的露点位移，最后的水规格是通过与LNG流混合而实现的，LNG流中的水微不足道。为了冷却压缩的NGH流，使用了LNG接收站的低温能。在设计了NGH再气化工艺后，根据运输距离，制冷剂类型，载体容量以及NGH与LNG的混合比进行了经济分析。然后，将常规LNG链与使用LNG和NGH的建议链进行比较。如果将重新气化的天然气量固定为每年370万吨（MTPA），则与传统的LNG链相比，拟议的链能够将总链成本降低多达10.6％。 ）运送到韩国。最后，进行天然气液化成本方面的投资风险。据此，随着运输距离的增加，提出的链条的风险降低。 （C）2016由Elsevier B.V.代表化学工程师学会出版。

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