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Side-rectifier divided wall column for offshore LNG plant

机译：海上LNG装置的侧馏分壁塔

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摘要

A side-rectifier DWC (divided wall column) is proposed to replace the whole FLNG (floating liquefied natural gas) plant, which comprises of three distillation columns in the conventional system. The proposed column is compact equipment suitable to harsh offshore operation of the gas plant, which is operated at low pressure to reduce the investment and electricity costs. The economics, thermodynamic efficiency and operational difficulty of the side-rectifier DWC are evaluated and compared with the conventional system. The heating and cooling duties of the side-rectifier DWC are 5.9% and 5.1% less than those of the conventional system, respectively. The economic evaluation indicates that the side-rectifier DWC requires 57% less investment and 10% more utility cost than the conventional system. However, low feed pressure used in the side-rectifier DWC saves the compressor cost of 5.1 times the investment cost and the electricity cost of 1.8 times the total utility cost of the high-pressure conventional system. (C) 2014 Elsevier B.V. All rights reserved.
机译：提出了一种侧向精馏器DWC（分隔壁塔）来代替整个FLNG（浮式液化天然气）装置，该装置在常规系统中包括三个蒸馏塔。拟议的塔是紧凑的设备，适用于天然气厂的恶劣海上作业，该作业在低压下进行，以减少投资和电力成本。对侧整流器DWC的经济性，热力学效率和操作难度进行了评估，并与常规系统进行了比较。侧面整流器DWC的加热和冷却负荷分别比常规系统低5.9％和5.1％。经济评估表明，与传统系统相比，侧面整流器DWC需要的投资少57％，公用事业成本高10％。但是，在侧整流器DWC中使用的低进料压力可节省压缩机成本（投资成本的5.1倍）和电力成本（是高压常规系统总实用成本的1.8倍）。 （C）2014 Elsevier B.V.保留所有权利。

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