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1. WO2021038205 - METHOD OF COOLING BOIL-OFF GAS AND APPARATUS THEREFOR

Publication Number WO/2021/038205
Publication Date 04.03.2021
International Application No. PCT/GB2020/052017
International Filing Date 21.08.2020
IPC
F25J 1/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT
1Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
F25J 1/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT
1Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
02requiring the use of refrigeration, e.g. of helium or hydrogen
CPC
F25J 1/0025
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
1Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
0002characterised by the fluid to be liquefied
0022Hydrocarbons, e.g. natural gas
0025Boil-off gases "BOG" from storages
F25J 1/0055
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
1Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
003characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
0047using an "external" refrigerant stream in a closed vapor compression cycle
0052by vaporising a liquid refrigerant stream
0055originating from an incorporated cascade
F25J 1/0212
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
1Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
02requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
0211using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
0212as a single flow MCR cycle
F25J 1/0216
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
1Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
02requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
0211using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
0214as a dual level refrigeration cascade with at least one MCR cycle
0215with one SCR cycle
0216using a C3 pre-cooling cycle
F25J 1/0262
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
1Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
02requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
0257Construction and layout of liquefaction equipments, e.g. valves, machines
0262Details of the cold heat exchange system
F25J 1/0265
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
1Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
02requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
0257Construction and layout of liquefaction equipments, e.g. valves, machines
0262Details of the cold heat exchange system
0264Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams
0265comprising cores associated exclusively with the cooling of a refrigerant stream, e.g. for auto-refrigeration or economizer
Applicants
  • BABCOCK IP MANAGEMENT (NUMBER ONE) LIMITED [GB]/[GB]
Inventors
  • FELBAB, Nikola
Agents
  • MURGITROYD & COMPANY
Priority Data
1912126.823.08.2019GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD OF COOLING BOIL-OFF GAS AND APPARATUS THEREFOR
(FR) PROCÉDÉ DE REFROIDISSEMENT DE GAZ D’ÉVAPORATION ET APPAREIL ASSOCIÉ
Abstract
(EN)
A method of cooling a boil-off gas (BOG) stream from a liquefied gas tank comprising at least the step of heat exchanging the BOG stream with a first refrigerant in a heat exchanger, the heat exchanger having an entry port and a warmer exit port, and comprising at least the steps of: (a) passing the first refrigerant into the entry port of the heat exchanger and into a first zone of the heat exchanger to exchange heat with the BOG stream, to provide a first warmer refrigerant stream; (b) withdrawing the first warmer refrigerant stream from the heat exchanger at an intermediate exit port between the entry port and the warmer exit port; (c) passing the first warmer refrigerant stream through an entry port located in a second zone of the heat exchanger that is warmer than the first zone (d) passing an oil-containing refrigerant stream through an entry port located in a second zone of the heat exchanger that is warmer than the first zone; (e) mixing the first warmer refrigerant stream and the oil-containing stream in the heat-exchanger to form a combined refrigerant stream; and (f) passing the combined refrigerant stream out of the heat exchanger through the warmer exit port.
(FR)
L'invention concerne un procédé de refroidissement d'un flux gaz d'évaporation (BOG) à partir d'un réservoir de gaz liquéfié comprenant au moins l'étape de transfert de chaleur du flux de BOG avec un premier fluide frigorigène dans un échangeur de chaleur, l'échangeur de chaleur ayant un orifice d'entrée et un orifice de sortie de réchauffeur, et comprenant au moins les étapes consistant à : (A) faire passer le premier fluide frigorigène dans l'orifice d'entrée de l'échangeur de chaleur et dans une première zone de l'échangeur de chaleur pour échanger de la chaleur avec le flux de BOG, pour fournir un premier flux de fluide frigorigène plus chaud ; (b) à retirer le premier flux de fluide frigorigène plus chaud de l'échangeur de chaleur au niveau d'un orifice de sortie intermédiaire entre l'orifice d'entrée et l'orifice de sortie de réchauffeur ; (c) faire passer le premier flux de fluide frigorigène plus chaud à travers un orifice d'entrée situé dans une seconde zone de l'échangeur de chaleur qui est plus chaude que la première zone (d) à faire passer un flux de fluide frigorigène contenant de l'huile à travers un orifice d'entrée situé dans une seconde zone de l'échangeur de chaleur qui est plus chaude que la première zone ; (e) mélanger le premier flux de fluide frigorigène plus chaud et le flux contenant de l'huile dans l'échangeur de chaleur pour former un flux de réfrigérant combiné ; et (f) le passage du flux de réfrigérant combiné hors de l'échangeur de chaleur à travers l'orifice de sortie de réchauffeur.
Latest bibliographic data on file with the International Bureau