| 초록 |
LNG-FPSO is an offshore comprehensive technology to exploit natural gas well in a deep and remote sea. There are gas pre-conditioning processes including AGRU and liquefaction process in LNG-FPSO. The design for many separation columns in the topside of LNG-FPSO should consider the effects of offshore condition in contrast to the onshore columns, because the separation efficiency diminishes due to the offshore effects. To understand the effects, column hydraulics including liquid hold up and pressure drop should be firstly studied. Hydraulics in a column is essential to understand the column operating region and mass transfer efficiency. The experiments were conducted with a structured packed column (diameter 400, 600, 900mm and packing height 4m). Main experimental conditions are ‘Liquid load’, ‘Gas factor’, ‘Viscosity’, ‘Surface tension’. For offshore conditions, permanent tilt and dynamic motion were selected as representative conditions. With appropriate data processing methods, total hold up was calculated. And pressure drop was measured. By analyzing holdup and pressure drop of each condition, the column operating region was analyzed.
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