Device for collecting and separating aqueous and/or oily liquids and cryogenic liquid

Abstract

The present invention relates to a device (1) for collecting and separating aqueous and / or oily liquids (3) and cryogenic liquid (4) such as LNG, comprising: a) a first container (1-1) comprising a bottom wall (1c) traversed by a first discharge pipe (1e) that opens into a first storage tank (1-3); and b) a second container (1-2) contained inside said first container, comprising a bottom wall (2b) above the level of said first discharge pipe(s) (1e), and an upper side wall (2a) comprising at least a drain port (2d) at the base thereof communicating with a side passage (5), and a lower side wall (2c) extending up to below the level of the upper end (1e1) of said first discharge pipe (1e), and a side passage (5) between said side walls (1b, 2a-2c) of the two containers; and c) a liquid collection pipe (1a) opening into said second container, and a second discharge pipe (1f) extending from above said second container (1-2) and opening into a second LNG storage tank (1-4).

Description

technical field [0001] The present invention relates to a device for collecting and separating water phase and / or oil phase liquid and cryogenic liquid, preferably liquefied gas, such as LNG (Liquefied Natural Gas), which device is also referred to below as " Splitter". [0002] The present invention more particularly relates to a separator for separating contaminating fluids such as run-off water, oil or actual any other industrial liquid. [0003] The invention relates more particularly to a separator which is mounted on a support which is installed in the sea (in the high seas or e.g. protected area), the support includes means for handling hazardous and / or corrosive liquids, preferably liquefied natural gas (LNG), in the on the deck of the pedestal, and the pedestal also includes at least one storage tank for storing the liquid and contained within the hull of the pedestal below the deck. Background technique [0004] This type of support can be, inter alia, a floati...

AI Technical Summary

Problems solved by technology

Such special steels are very expensive and usually they are not used for support elements or structures for FPSOs, which are usually made of ordinary steel

However, such common steels become brittle when exposed to very low temperatures and lose their mechanical strength, so there is a risk of fracture of structural elements and in the event of a major leak directly onto said deck, unless critical The parts are protected by insulating material which itself can withstand low temperatures very well, otherwise it may even break the deck of the FPSO

[0016] 3) Since cold LNG (-165°C) is suddenly heated by seawater in the temperature range of 10°C to 20°C, and is heated in the presence of air (and thus in the presence of oxygen), the Sudden contact between LNG and sea water is very dangerous and also leads to a very high risk of immediate explosion

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