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WO2016038087A1 - Équipement de traitement d'hydrocarbures intégrant un système de prise d'eau - Google Patents

Équipement de traitement d'hydrocarbures intégrant un système de prise d'eau Download PDF

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Publication number
WO2016038087A1
WO2016038087A1 PCT/EP2015/070606 EP2015070606W WO2016038087A1 WO 2016038087 A1 WO2016038087 A1 WO 2016038087A1 EP 2015070606 W EP2015070606 W EP 2015070606W WO 2016038087 A1 WO2016038087 A1 WO 2016038087A1
Authority
WO
WIPO (PCT)
Prior art keywords
water intake
water
processing plant
hydrocarbon processing
hydrocarbon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2015/070606
Other languages
English (en)
Inventor
Robbert Van Der Wal
Scott M. DAVEY
Christiaan M. NA
Augustine FRANCIS
Roel BRANDT
Casimir Willem Hendrik VAN DOORNE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
Shell USA Inc
Original Assignee
Shell Internationale Research Maatschappij BV
Shell Oil Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shell Internationale Research Maatschappij BV, Shell Oil Co filed Critical Shell Internationale Research Maatschappij BV
Publication of WO2016038087A1 publication Critical patent/WO2016038087A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring 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
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0277—Offshore use, e.g. during shipping
    • F25J1/0278—Unit being stationary, e.g. on floating barge or fixed platform
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring 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
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0296—Removal of the heat of compression, e.g. within an inter- or afterstage-cooler against an ambient heat sink
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/448—Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO]

Definitions

  • the present invention relates to a hydrocarbon processing plant and a method of operating of such a hydrocarbon processing plant.
  • a commercially important liquefied hydrocarbon is liquefied natural gas (LNG) , which is typically produced by extracting heat from a natural gas stream whereby the natural gas is cooled to reach a temperature that is below the bubble point of the LNG at atmospheric pressure.
  • the temperature is typically about -162 °C.
  • the removed heat is generally brought into the ambient.
  • the heat is removed by cooling (sea) water and generally released into the ambient, e.g. sea.
  • the LNG Before use by an end user, the LNG is typically prepared.
  • revaporized which involves withdrawing heat from the ambient and adding this heat to the LNG.
  • the heat may be taken from a stream of (sea) water.
  • hydrocarbon processing plant is used in this text to refer to plants processing natural gas by liquefying a vaporous hydrocarbon containing feed stream and/or by gasifying a liquefied hydrocarbon containing stream.
  • Floating hydrocarbon processing plants are known which are provided on floating structures.
  • An example of a floating hydrocarbon processing plant is a floating liquid natural gas vessel (FLNG vessel) .
  • FLNG vessel floating liquid natural gas vessel
  • Such floating hydrocarbon processing plants comprise a hull and comprise at least one LNG storage tank for storing liquefied natural gas.
  • hydrocarbon processing plants with are provided on gravity based off-shore structures. These will be referred to in this text as off-shore gravity based
  • hydrocarbon processing plants These structures comprise a hull which is positioned on the bottom of a body of water.
  • the hull of these structures can be made of concrete or steel and comprise permanent ballast tanks.
  • the ballast tanks are empty during transportation of the structure and are filled with water to sink the structure on the intended location.
  • WO2011101461 relates to a floating hydrocarbon processing vessel comprising a plurality of first storage tanks arranged on a starboard side of a longitudinal mid-plane of the vessel, a plurality of second storage tanks arranged on the port side of the longitudinal mid-plane and in symmetrical side-by-side arrangement with the plurality of first storage tanks.
  • the vessel further comprises at least one longitudinal bulkhead extending along the mid-plane and located between adjacent first and second storage tanks.
  • Floating hydrocarbon processing vessels are further known to comprise at least one water ballast tank for storing ballast water to keep the floating LNG plant at a desired draught even when the floating LNG plant is not or only lightly loaded.
  • the water ballast tanks are in fluid
  • the water ballast tanks may be located in between the hull of the vessel and the LNG storage tanks, in particular extending in the space underneath the LNG storage tanks .
  • Hydrocarbon processing plants comprise equipment, including heat exchangers, to cool a vaporous hydrocarbon containing feed stream to produce a liquefied hydrocarbon containing stream and/or heat a liquefied hydrocarbon containing stream to produce a vaporous hydrocarbon
  • a water intake system is provided to take in water from the body of water the
  • hydrocarbon processing plant is located in, which water is fed to the heat exchangers as cooling/heating medium.
  • the water intake system for taking in cooling or heating water is separated from a ballast water intake and discharge system.
  • Floating hydrocarbon processing plants often comprise a water intake riser assembly being suspended from the floating structure into the body of water to take in water from a certain depth and supply the water to the heat exchangers via the water intake riser assembly.
  • the water is used to add heat to, or remove heat from, a hydrocarbon stream.
  • water intake riser assemblies In some cases, it is not possible to use water intake riser assemblies. This is for instance the case when the floating hydrocarbon processing plant is operational in shallow waters or in case of a gravity based off-shore hydrocarbon processing plant.
  • US4041721 provides an example of a floating natural gas processing plant using side water intake systems.
  • the side water intake system is provided in a side wall of the hull of the vessel.
  • Water intake pumps are provided to take water in.
  • a hydrocarbon processing plant 1 comprising a hull 10 which, in use, is at least partially submerged in a body of water, the hull 10 comprises a storage tank 20 suitable for storing liquefied natural gas, wherein the hydrocarbon processing plant 1 comprises a water ballast tank 30 positioned between the hull 10 and the storage tank 20, wherein the hydrocarbon processing plant 1 comprises a heat exchanger 40 and a water intake system 50, the heat exchanger 40 being in fluid communication with the water intake system 50 via a piping system 60 to supply water to the heat exchanger 40, wherein at least part of the piping system 60 is routed through the water ballast tank 30.
  • the part of the piping system routed through the water ballast tank is easily accessible by personnel for inspection and maintenance. More than one storage tank 20 may be present. More than one water ballast tank 30 may be present .
  • the hydrocarbon processing plant may be a floating hydrocarbon processing plant or a gravity based off-shore hydrocarbon processing plant.
  • the hydrocarbon processing plant 1 comprises a
  • (elongated) hull 10 comprising side walls 11, a base 12 extending between the side walls 11, a deck 13 being located atop the hull 10 and between the side walls 11.
  • hydrocarbon processing plant 1 may comprise at least one processing deck 14, which is elevated with respect to the deck 13.
  • the hull, in particular the side walls and the base are typically made of steel.
  • the hull, in particular the side walls and the base are typically made of concrete or steel.
  • One or more heat exchangers 40 are typically positioned on the processing deck 14 or below the deck 13 in the substructure and are arranged to allow heat to be exchanged between a hydrocarbon stream, e.g. natural gas (in liquefied and/or vaporized form) and water. Hydrocarbon processing plants for vaporizing liquid natural gas typically deploy the heat exchangers on the processing deck. Hydrocarbon
  • processing plants for liquefying natural gas typically deploy the heat exchangers inside the hull, i.e. in the hull machinery space, possibly with one or more additional heat exchangers on the (processing) deck.
  • the heat exchanger 40 is part of a line up for liquefying or vaporizing the hydrocarbon stream. A more detailed discussion of the cooling or heating line up is not deemed necessary.
  • a storage tank is suitable for storing liquefied natural gas if the tank is capable of withstanding the cryogenic conditions associated with liquid natural gas (temperatures of -162°C and less), including during filling and emptying the storage tank.
  • Storage tanks for liquefied natural gas typically fall into one of the following categories : SPB, Kvaerner-Moss , and membrane tanks.
  • the SPB tank (Self-supporting Prismatic Type "B") is a free-standing tank system.
  • the SPB design has flat walls which are internally stiffened by webs and girders to reduce the stresses and deflections to acceptable limits under service conditions .
  • the Kvaerner-Moss tank is a spherical tank system.
  • the sphere contains no internal structural members or bulkheads, and usually can withstand sloshing of the cryogenic contents thereof .
  • Membrane tanks are tanks wherein the inner surface is provided with a membrane.
  • the membrane may be Invar or stainless steel.
  • At least part of the piping system 60 routed through the water ballast tank 30 is positioned underneath the storage tank 20.
  • the water ballast tank 30 may comprise a base part 31 extending in a space between one or more storage tanks 20 and a base of the hull 10.
  • the base part 31 is thus positioned underneath the storage tank 20.
  • At least part of the piping system is routed through the base part 31 of this water ballast tank 30.
  • the water ballast tank 30 may further comprise one or more parts 32 being positioned beside the one or more storage tanks 20, i.e. in between the storage tanks 20 and the side wall 11 of the hull.
  • the water ballast tank 30 may be segmented, i.e. divided in two or more components.
  • the water intake system 50 is a side water intake system.
  • Such a side water intake system comprises at least one water intake opening 51 in a wall, in particular a side wall of the hull 10.
  • the water intake openings are located in a part of the (side) wall that is, in use, located underwater.
  • the term wall is used to refer to a vertical part of the hull 10.
  • the hull 10 may typically be an elongated hull 10, in which case the side wall of the hull 10 extends in an elongated direction of the hull 10.
  • the water intake system 50 comprises a plurality of water intake openings 51 in the hull 10.
  • the water intake system may comprise four, five, six, seven, eight, nine or ten water intake openings 51. This makes the necessary piping system 60 for
  • the plurality of water intake openings may be positioned in the side wall of the hull.
  • the water intake openings 51 may be provided in a straight or staggered horizontal row along the hull 10 of the structure.
  • staggered is used to indicate that the water intake openings are positioned on different horizontal positions, but are not positioned on the same height, for instance in a "rast° tannin° tint° "-configuration.
  • the water intake openings may also be provided in two straight horizontal rows, the water intake openings of one row being above the water intake openings of the other row.
  • each water intake opening 51 has an associated water intake conduit 61 and an associated water intake pump 62.
  • the piping system may comprise a plurality of water intake conduits 61, each water intake conduit 61 being associated with one water intake opening 51 to transport water from the respective water intake opening 51 through an associated water intake pump 62 to the heat exchanger (s) 40.
  • the water intake can be interrupted for one or more individual water intake openings 51, for instance in case maintenance is needed.
  • the water intake conduits 61 may be interconnected, the interconnections comprising controllable valves.
  • a group of two or more water intake openings shares a water intake pump.
  • the water intake conduits of the group are connected to a shared water intake conduit, which is connected to an associated water intake pump.
  • the hydrocarbon processing plant comprises a plurality of water intake pumps 62, wherein the water intake pumps 62 are positioned in a shared pump room 63.
  • each water intake opening 51 has one
  • water intake pump 62 which allows for individual control of the water intake via the respective water intake openings 51, making the water intake less prone to pump failures and blockages.
  • water intake pumps may be associated with more than one water intake opening, for instance via the above mentioned interconnections comprising controllable valves.
  • each water intake pump 62 is associated with a group of water intake openings 51.
  • the water intake pump(s) 62 is/are in fluid communication with the associated water intake opening 51 via at least part of the associated water intake conduit 61 to pump in water through the associated water intake opening 51.
  • the one or more water intake pumps 62 are not positioned in the water ballast tank 30, but in a pump room which is fluidly separated from the water ballast tank 30.
  • a pump room which is fluidly separated from the water ballast tank 30.
  • the location of the pump room is selected taking into account length of the piping system and space utilization.
  • the pump room 63 is located horizontally adjacent to the storage tank 20.
  • the location of the pump room is preferably chosen close to the water intake openings to minimize the length of the piping system 60. This reduces the maintenance costs, reduces the available space needed for the piping system and also reduces the maintenance costs of the piping system.
  • the pump room 63 is preferably positioned between the aft machinery space and the storage tanks 20, wherein the pump room may be positioned beneath fluid storage tanks 64 e.g. slop tanks, chemical tanks, condensate tanks and water storage tanks. Alternatively the pump room 63 can also be located inside the machinery room.
  • fluid storage tanks 64 e.g. slop tanks, chemical tanks, condensate tanks and water storage tanks.
  • the pump room 63 can also be located inside the machinery room.
  • the hydrocarbon processing plant comprises a water intake pump 62, wherein the water intake pump 62 is positioned in the water ballast tank 30.
  • the water intake pump may be in fluid connection with one or more water intake openings . In case more than one water intake openings are provided, more than one water intake pump may be provided. Preferably, the number of water intake openings and water intake pumps are equal, which each water intake opening having a single associated water intake pump.
  • the water intake system 50 comprises an air disengagement tank 70 positioned in the water ballast tank 30.
  • an air disengagement tank 70 with a vent channel 80 may be provided.
  • each water intake opening 51 has its own associated air disengagement tank 70.
  • the air disengagement tank 70 may comprise a tank inlet which is formed by or is in fluid communication with a water intake opening of the (side) water intake system 50.
  • the air disengagement tank 70 comprises a tank outlet 71 which is in fluid communication with the piping system 60.
  • a flow obstruction element 72 e.g. a weir, may be provided in between the tank inlet and the tank outlet.
  • the vent channel 80 comprises a vent channel inlet 81 being in fluid communication with an opening in the upper half of the air disengagement tank 70 and a vent channel outlet 82 being in fluid communication with the vent channel inlet 81, the vent channel outlet 82 being at a higher level than the vent channel inlet 81.
  • Providing such an air disengagement tank 70 with a vent channel 80 allows air to escape from the water before the water reaches the water intake pumps 62 and thereby reduces air associated damage to the water intake pumps 62 and subsequent equipment, e.g. caused by cavitation.
  • the air disengagement tank 70 may be positioned in the water ballast tank 30. At least part of the vent channel 80 may be routed through the water ballast tank 30, in
  • the one or more water intake pumps may be positioned close to the water intake openings . In case an air
  • the water intake pumps may be positioned inside or adjacent the respective air disengagement tanks. In case the water intake pump is positioned inside the air disengagement tank it is preferably positioned downstream of the flow obstruction element, if present.
  • the water intake system 50 comprises an inlet filter 52 and a blast device 80 to blast gas or air through the inlet filter 52 in a direction opposite to a water intake direction.
  • Inlet filter systems comprising an inlet filter, allow water to flow through or towards the water intake opening, while preventing particles and marine life with a certain minimum size to flow through the inlet filter system.
  • the inlet filter system may be positioned in the water intake opening.
  • the inlet filter system may also be provided in a housing which is attached to the hull and is positioned on the outside of the hull in fluid communication with the water intake opening.
  • the housing comprises one or more openings which are in fluid communication with the body of water.
  • the housing may not comprise pumps and is referred to as a passive inlet filter system.
  • Commercially available inlet filter systems may be used, such as Johnson Screens®, passive water intake screens from Euroslot Kdds . , Ovivo or Screen Services .
  • the blast device 80 operates the blast device 80 creates a counter flow which removes contamination from the inlet filter system, in particular from the inlet filter 52.
  • the blast device 80 comprises an air or gas supply unit 81, e.g. a high pressure air storage which is fed by a supply either from a common header or a separate pressure device e.g. compressor to increase the pressure and a blast conduit 82 which is with one end connected to the supply unit 81 and has another end directed to the inlet filter 51 in a direction opposite to the water intake direction.
  • the blast conduit 82 comprises a controllable valve 83 to open or close the blast conduit. Opening the valve 83 initiates a blast, closing the valve 83 terminates the blast.
  • the one or more controllable valve may be positioned on the (processing) deck or inside the water ballast tank 30. At least part of the blast conduit is routed through the water ballast tank 30.
  • more than one blast devices may be provided, although they may share certain parts, such as the (high pressure) air storage.
  • the one or more (high pressure) air storages may be positioned on the (processing) deck.
  • the water intake system 50 comprises an anti-fouling supply system 90 to supply an anti- fouling agent to the piping system 60.
  • the anti-fouling agent may be injected inside or directly downstream of the water intake opening 51 or inside or directly downstream of the inlet filter 52.
  • the anti-fouling agent prevents marine growth development inside the water intake system 50.
  • An example of an anti- fouling agent is hypochlorite, typically sodium hypochlorite.
  • the anti-fouling supply system 90 comprises an anti- fouling agent supply unit 91 (e.g. comprising an anti fouling agent pump and/or an anti-fouling storage) and an anti- fouling supply conduit 92 which is with one end connected to the anti-fouling agent supply unit and has another end located in the vicinity of the water intake opening or filter system, for instance in air disengagement tank 70.
  • At least part of the anti-fouling agent supply conduit 92 is routed through the water ballast tank 30, in particular through the part of the water ballast tank 32 located in between the storage tanks 20 and the side wall 11 of the hull.
  • a pump 93 is provided to pump the anti fouling agent to the piping system 60 or to the air disengagement tank 70.
  • the anti-fouling agent supply system is preferably positioned on the (processing) deck with the anti-fouling supply conduit at least partially running through the water ballast tank.
  • the anti-fouling supply conduit may run through the water ballast tank and may run through the water intake opening 51 towards the filter system.
  • the hydrocarbon processing plant 1 is arranged to process natural gas by liquefying a vaporous hydrocarbon containing feed stream and storing the liquefied natural gas in the at least one storage tank 20 and/or by gasifying a liquefied hydrocarbon containing stream taken from the at least one storage tank 20.
  • Liquefying and gasifying involve the use of one or more heat exchangers.
  • the water intake system 50 and the water intake openings 51 are preferably positioned in the longitudinal half of the hull furthest removed from the mooring point, e.g. the turret. This minimizes the length of the piping system.
  • the position can also be in the bow or aft to minimize the recirculation effect and to minimize the piping length.
  • Water discharge openings for discharging water that has been used in the one or more heat exchangers are preferably also positioned in the longitudinal half of the hull furthest from the mooring point, e.g. the turret, but on a side opposite of the side where the water intake openings are provided, to prevent the risk or recirculation.
  • the method comprises:
  • Fig. 1 schematically shows a cross sectional view of a floating hydrocarbon processing plant according to an embodiment
  • Fig.'s 2a - 2b schematically show a cross sectional top and side view respectively of a floating hydrocarbon
  • Fig.'s 3a - 3b schematically show a cross sectional top and side view respectively of a floating hydrocarbon
  • Fig. 4 schematically shows a cross sectional side view of a floating hydrocarbon processing plant according to a further embodiment .
  • Fig. 1 schematically depicts a side view of a floating hydrocarbon processing plant 1.
  • the hull 10 comprises side walls 11, a base 12 and a deck 13. On top of the deck 13 an elevated processing deck 14 may be present.
  • storage tank 20 Inside the hull is storage tank 20 for storing liquefied natural gas.
  • the storage tank is surrounded by a water ballast tank 30 comprising a base part 31 and a side parts 32 being in between the storage tanks and the side walls 11 of the hull 10.
  • heat exchanger 40 On the processing deck a heat exchanger 40 is shown. It will be understood that additional equipment will be present, such as compressors, valves, vessels, pumps, air coolers etc. However, for reasons of clarity, only a single heat exchanger 40 is shown.
  • This heat exchanger 40 may be any type of suitable heat exchanger, such as a plate type heat exchanger.
  • the heat exchanger may be arranged to receive water, discharge water, receive a refrigerant and discharge
  • the water intake system 50 shown is may thus be referred to as a side water intake system.
  • the water intake opening 51 is used to take in water which is to be used in one or more heat exchangers for cooling or heating purposes.
  • a piping system 60 is provided which connects the water intake opening 51 with the heat exchanger 40.
  • the piping system is not shown completely in Fig. 1 but it will be understood that the piping system may comprise all sorts of equipment to convey the water from the water intake opening 51 to the heat exchanger 40, such as pumps, conduits, filters, storage vessels etc.
  • At least part of the piping system 60 is routed through the water ballast tank 30, in particular through a base part 31 of the water ballast tank 30.
  • comprising an inlet filter may be provided to filter the water and thereby prevent marine life and debris from entering the piping system 60.
  • One or more water intake pumps may be provided on any suitable location.
  • Fig. 2a and 2b schematically depict a further embodiment in which the water intake system 50 comprises a plurality of water intake openings 51 with a plurality of inlet filter systems comprising an inlet filter 52.
  • the piping system 60 comprises a plurality of water intake conduits 61 each extending at least partially through the water ballast tank 30.
  • Each water intake conduit 61 comprises an associated water intake pump 62. All water intake pumps 62 are
  • Fig. 1 shows a single combined water intake conduit 65.
  • two or more combined water intake conduits 65 may be provided, each combining one or more water intake conduits 61.
  • the pump room 63 is located horizontally adjacent one of the storage tanks 20 and may be positioned below fluid storage tanks 64 e.g. slop tanks, chemical tanks, condensate tanks and water storage tanks. Alternatively the pump room 63 can also be located inside the machinery room (not shown) .
  • Fig.'s 3a and 3b schematically depict an alternative embodiment, wherein the water intake pumps 62 are positioned inside the water ballast tank 30, in particular in the base part 32 thereof.
  • the water intake pumps 62 are positioned adjacent or at least close to the water inlet openings 51.
  • Fig.'s 3a - 3b further schematically depict the presence of air disengagement tanks 70.
  • Each water intake opening 51 may have one associated air disengagement tank 70.
  • the air disengagement tank 70 comprises a flow obstructions element 72 and has a vent channel 80 which allows air to escape from the water.
  • the water intake pumps 62 are positioned inside the water ballast tank 30.
  • Fig. 4 shows a further embodiment comprising an air disengagement tank 70 positioned in the water ballast tank 30 with the water intake pump 62 being positioned inside the air disengagement tank 70.
  • the water intake pump 62 is positioned downstream of the flow obstructions element 72, inside or at least partially inside the air disengagement tank 70.
  • a blast device 80 comprising an air or gas supply unit 81, a blast conduit 82 and a controllable valve 83 as described above.
  • the supply unit 81 is positioned on the deck 13 by way of example.
  • the blast conduit 82 is at least partially routed through the water ballast tank 30, in particular through the part of the water ballast tank 32 located in between the storage tanks 20 and the side wall 11 of the hull.
  • Fig. 4 further shows an anti-fouling supply system 90 to supply an anti-fouling agent to the piping system 60, for instance by introducing the ant-fouling agent into the air disengagement system 70.
  • the anti-fouling supply system 90 comprises an anti- fouling agent supply unit 91, an anti-fouling supply conduit 92 and a pump 93 provided to pump the anti fouling agent from the supply unit 91 to the piping system 60.
  • the anti-fouling supply unit 91 may comprise a discharge nozzle 94 at the end remote of the supply unit 91.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne un équipement de traitement d'hydrocarbures (1) comprenant une coque (10) qui, lors de l'utilisation, est au moins partiellement immergée dans une masse d'eau. La coque (10) comprend un réservoir de stockage (20) convenant au stockage du gaz naturel liquéfié. L'équipement de traitement d'hydrocarbures (1) comprend un ballast (30) positionné entre la coque (10) et le réservoir de stockage (20). L'équipement de traitement d'hydrocarbures (1) comprend un échangeur thermique (40) et un système de prise d'eau (50). L'échangeur thermique (40) est en communication fluidique avec le système de prise d'eau (50) par l'intermédiaire d'un système de tuyauterie (60) destiné à alimenter en eau l'échangeur thermique(40). Au moins une partie du système de tuyauterie (60) traverse le ballast (30).
PCT/EP2015/070606 2014-09-11 2015-09-09 Équipement de traitement d'hydrocarbures intégrant un système de prise d'eau Ceased WO2016038087A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041721A (en) 1975-07-07 1977-08-16 The Lummus Company Vessel having natural gas liquefaction capabilities
JP2010058772A (ja) * 2008-09-08 2010-03-18 Mitsubishi Heavy Ind Ltd 浮体構造物
KR20110061876A (ko) * 2009-12-02 2011-06-10 삼성중공업 주식회사 부유식 해상구조물
WO2011101461A1 (fr) 2010-02-22 2011-08-25 Shell Internationale Research Maatschappij B.V. Navire et procédé de traitement d'hydrocarbure
WO2011118228A1 (fr) * 2010-03-26 2011-09-29 日揮株式会社 Dispositif de prise d'eau
KR20110130135A (ko) * 2010-05-27 2011-12-05 삼성중공업 주식회사 액화천연가스 저장탱크를 구비한 선박 및 부유식 해상 구조물
WO2012066039A1 (fr) 2010-11-18 2012-05-24 Shell Internationale Research Maatschappij B.V. Ensemble colonne montante de prise d'eau pour une structure marine, procédé de production d'un courant d'hydrocarbure liquéfié et procédé de production d'un courant d'hydrocarbure à l'état de vapeur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041721A (en) 1975-07-07 1977-08-16 The Lummus Company Vessel having natural gas liquefaction capabilities
JP2010058772A (ja) * 2008-09-08 2010-03-18 Mitsubishi Heavy Ind Ltd 浮体構造物
KR20110061876A (ko) * 2009-12-02 2011-06-10 삼성중공업 주식회사 부유식 해상구조물
WO2011101461A1 (fr) 2010-02-22 2011-08-25 Shell Internationale Research Maatschappij B.V. Navire et procédé de traitement d'hydrocarbure
WO2011118228A1 (fr) * 2010-03-26 2011-09-29 日揮株式会社 Dispositif de prise d'eau
KR20110130135A (ko) * 2010-05-27 2011-12-05 삼성중공업 주식회사 액화천연가스 저장탱크를 구비한 선박 및 부유식 해상 구조물
WO2012066039A1 (fr) 2010-11-18 2012-05-24 Shell Internationale Research Maatschappij B.V. Ensemble colonne montante de prise d'eau pour une structure marine, procédé de production d'un courant d'hydrocarbure liquéfié et procédé de production d'un courant d'hydrocarbure à l'état de vapeur

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