公开(公告)号：US11255602B2

公开(公告)日：2022-02-22

申请号：US16315115

申请日：2017-06-20

Applicant: SAIPEM S.P.A.

Inventor： Eric Zielinski ,  Nathalie Trichard ,  Julien Bellande ,  Benjamin Rodier

IPC: F25J1/02 ,  F25J1/00

Abstract: A process for liquefying a natural gas comprising a mixture of hydrocarbons predominating in methane, the process comprising a first semi-open refrigerant cycle with natural gas in which any natural gas liquids that have condensed are separated from the natural gas feed stream, which stream then passes through a main cryogenic heat exchanger (4) in order to contribute by heat exchange to pre-cooling a main natural gas stream (F-P) and to cooling an initial refrigerant gas stream (G-0), a second semi-open refrigerant cycle with natural gas for contributing to pre-cooling the natural gas and the refrigerant and also to liquefying the natural gas, and a closed refrigerant cycle with refrigerant gas for subcooling the liquefied natural gas and for delivering refrigeration power in addition to the other two cycles. The invention also provides a natural gas liquefaction installation for performing such a process.

公开(公告)号：US11167221B2

公开(公告)日：2021-11-09

申请号：US16604621

申请日：2018-03-29

Applicant: SAIPEM S.P.A.

Inventor： Bertrand Duparc ,  Benjamin Rodier ,  Boris Bolosier

IPC: B01D3/00 ,  B01D53/18 ,  B01D3/16 ,  B01D3/32 ,  B01J8/04 ,  F25J3/04

Abstract: A double liquid distribution device (1) suitable for use in in a fractionating or wash column (10) including a high collector tray (2) connected to a manifold support (7) via at least two longitudinal liquid downflow ducts (5, 6), the manifold support (7) supporting at least two series of transverse tubular manifolds (8, 8a 8b) and serving to feed liquid respectively to the first series of manifolds (8a) via a first longitudinal duct (5) and to the second series of manifolds (8b) via a second longitudinal duct (6), each manifold (8, 8a 8b) including distribution orifices (8c) in its under face that are suitable for distributing the liquid onto the top face of the packing bed (9). The two longitudinal liquid downflow ducts (5, 6) are connected together in a low portion (5b, 6b) by a communication device (11) fitted with a valve (12) having controlled opening that is suitable for allowing the liquid to be transferred between the two longitudinal ducts in a controlled manner.