WO2020241688A1 - 水上浮体式設備 - Google Patents

水上浮体式設備 Download PDF

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Publication number
WO2020241688A1
WO2020241688A1 PCT/JP2020/020924 JP2020020924W WO2020241688A1 WO 2020241688 A1 WO2020241688 A1 WO 2020241688A1 JP 2020020924 W JP2020020924 W JP 2020020924W WO 2020241688 A1 WO2020241688 A1 WO 2020241688A1
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WO
WIPO (PCT)
Prior art keywords
floating
water
gas
lng
heating
Prior art date
Application number
PCT/JP2020/020924
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English (en)
French (fr)
Japanese (ja)
Inventor
真実 中山
ジフン ナ
Original Assignee
株式会社 商船三井
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 株式会社 商船三井 filed Critical 株式会社 商船三井
Priority to CN202080039708.1A priority Critical patent/CN113891830A/zh
Priority to SG11202113061YA priority patent/SG11202113061YA/en
Priority to KR1020217038618A priority patent/KR102631877B1/ko
Publication of WO2020241688A1 publication Critical patent/WO2020241688A1/ja

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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 
    • 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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/12—Heating; Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J3/00—Driving of auxiliaries
    • B63J3/04—Driving of auxiliaries from power plant other than propulsion power plant

Definitions

  • the present invention relates to floating floating equipment.
  • a ship that transports LNG (liquefied natural gas) is known (see, for example, Patent Document 1).
  • LNG transported by such a ship is regasified using the heat of seawater via FSRU (floating storage regasification unit) and sent to onshore equipment. ..
  • FSRU floating storage regasification unit
  • the electric power required for the operation as FSRU is generated by using a diesel generator using fossil fuel or the like.
  • An object of the embodiment of the present invention is to provide a floating floating facility that functions as an FSRU that uses water in the natural environment and suppresses the influence on the natural environment.
  • the floating floating equipment includes a tank for storing a liquid gas, a vaporizing means for vaporizing the gas stored in the tank, and the gas vaporized by the vaporizing means on land.
  • a Rankin cycle that generates power by a Rankin cycle based on the temperature difference between the gas delivery means to be delivered to the equipment, the water intake means for taking in water in the natural environment, and the water taken in by the water intake means. It is equipped with a power generation means.
  • the block diagram which shows the structure of the floating body type equipment which concerns on embodiment of this invention.
  • the Ts diagram which shows the temperature / specific enthalpy of ORC which concerns on this embodiment.
  • FIG. 1 is a configuration diagram showing a configuration of a floating floating turbine 1 according to an embodiment of the present invention.
  • the floating floating equipment 1 is a floating floating LNG terminal that stores LNG, regass the stored LNG, and sends high-pressure gas to equipment on land (for example, a gas pipe). That is, the floating floating equipment 1 is an FSRU. Further, the floating floating equipment 1 is a navigable mobile body (for example, a ship).
  • the floating floating equipment 1 has a function of storing a liquid gas (for example, LNG), regasifying (vaporizing) the gas, and sending it to land, and water such as seawater, river water, or lake water. Any shape and structure may be used as long as the equipment floats on the surface.
  • the floating floating equipment 1 does not have to be in the shape of a ship, and may not have a propulsion equipment.
  • the floating floating equipment 1 will be mainly described as being configured as a ship navigating in the ocean.
  • the floating floating equipment 1 includes a turbo generator 3, an LNG vaporizer 4, an organic medium circulation pump 5, a first heat exchanger 6, a second heat exchanger 7, a third heat exchanger 8, and a fourth heat exchanger 9.
  • 5th heat exchanger 10 diesel generator 11, recondenser (reliquefaction device) 12, LNG booster pump 13, trim heater (heat exchanger for regas temperature adjustment) 14, LNG tank 15, feed pump (feed pump) ) 16, BOG (boil off gas) compressor 17, heating seawater pump 18, heating medium circulation pump 19, cooling seawater pump 20, cooling fresh water booster pump 21, organic medium piping L1, LNG piping L2, BOG piping L3, A seawater pipe L4, a heating medium pipe L5, a cooling fresh water pipe L6, and a regas pipe L7 are provided.
  • the organic medium pipe L1 is a pipe through which the organic medium used in the power generation system 2 flows.
  • the organic medium pipe L1 is configured so that the organic medium circulates between the LNG vaporizer 4 and the turbo generator 3.
  • the organic medium pipe L1 includes a path from the LNG vaporizer 4 to the turbo generator 3 via the first heat exchanger 6 and the second heat exchanger 7 in sequence, and from the LNG vaporizer 4 to the first heat exchanger 6.
  • the route is configured to branch into a route that passes through the third heat exchanger 8 and a route that does not pass through the third heat exchanger 8 (bypass).
  • the organic medium flows through a path that passes through the third heat exchanger 8, and while the BOG compressor 17 is stopped, the organic medium flows through a path that does not pass through the third heat exchanger 8. It flows.
  • the order in which the organic medium passes through the three heat exchangers 6 to 8 may be configured in any order.
  • the organic medium is, for example, propane, but it may not be a flammable medium but a non-flammable medium having thermal characteristics close to those of propane.
  • the LNG pipe L2 is configured so that LNG is sent from the LNG tank 15 to the recondenser 12.
  • LNG may have any composition.
  • the BOG pipe L3 is configured so that BOG (boil off gas) is sequentially sent from the upper part of the LNG tank 15 to the recondenser 12 via the BOG compressor 17 and the third heat exchanger 8. Further, the BOG pipe L3 is provided with a path for sending the BOG for fuel supply of the diesel generator 11. BOG is a gaseous natural gas in which a part of LNG accumulated in the LNG tank 15 is vaporized by heat input.
  • seawater taken in from outside the ship is sent to each of the 4th heat exchanger 9 and the 5th heat exchanger 10, and is heated or heated from each of the 4th heat exchanger 9 and the 5th heat exchanger 10.
  • the seawater used for cooling is configured to be discharged overboard.
  • the heating medium pipe L5 is a pipe through which the heating medium flows.
  • the heating medium circulates between the fourth heat exchanger 9 and the trim heater 14 and between the fourth heat exchanger 9 and the first heat exchanger 6. It is configured to include a route to do so.
  • the heating medium is used to heat the organic medium by the first heat exchanger 6, and is also used as the heating medium of the trim heater 14.
  • a heating medium which is an antifreeze heat medium, is used as an intermediate medium between the organic medium and seawater.
  • the heating medium is an aqueous ethylene glycol solution (glycol water), but other media such as propane may also be used.
  • the cooling fresh water pipe L6 is a pipe through which fresh water flows to cool the engine supply air with an air cooler of the diesel generator 11.
  • the cooling fresh water pipe L6 is configured so that fresh water flows and circulates in sequence through the fifth heat exchanger 10, the diesel generator 11, and the second heat exchanger 7.
  • the regas pipe L7 is configured so that vaporized (regasified) natural gas is sent from the LNG vaporizer 4 to the onshore equipment via the trim heater 14.
  • the power generation system 2 includes a turbo generator 3, an LNG vaporizer 4, an organic medium circulation pump 5, a first heat exchanger 6, a second heat exchanger 7, a third heat exchanger 8, and an organic medium pipe L1. Will be done.
  • the power generation system 2 is an organic Rankine cycle (ORC) power generation system that generates power by a Rankine cycle using an organic medium.
  • the turbo generator 3 generates electricity by utilizing the temperature difference between the LNG cold heat and other heat sources.
  • the outline of the operation of the power generation system 2 is as follows.
  • Each heat exchanger 6 to 8 heats (vaporizes) an organic medium to produce superheated steam.
  • the turbo generator 3 rotates the turbine by expanding the superheated steam produced by the heat exchangers 6 to 8 in the turbine.
  • the turbo generator 3 generates electricity by this rotational force (work).
  • the organic medium that has worked in the turbine of the turbo generator 3 is cooled by the LNG vaporizer 4 in a gas state or a gas-liquid mixed state to be condensed and liquefied, and returns to each of the heat exchangers 6 to 8.
  • the power generation system 2 repeats this series of operations to perform a cycle for generating power.
  • the turbo generator 3 has a configuration in which a turbine rotor having wings is connected to the generator.
  • the turbo generator 3 is a generator that uses a polymer organic medium instead of steam.
  • the LNG vaporizer 4 is a heat exchanger for absorbing heat from the organic medium flowing through the organic medium pipe L1 to vaporize (regasify) LNG.
  • the LNG vaporizer 4 is a shell and tube type, but other types may be used.
  • the organic medium circulation pump 5 is a pump for boosting the pressure of the condensed / liquefied organic medium cooled by the LNG vaporizer 4 and circulating the organic medium in the organic medium pipe L1 of the power generation system 2.
  • a tank for temporarily storing the liquefied organic medium may be provided on the upstream side of the organic medium circulation pump 5 (the wake side of the LNG vaporizer 4).
  • the first heat exchanger 6 heats the organic medium with the heating medium by exchanging heat between the organic medium flowing through the organic medium pipe L1 and the heating medium flowing through the heating medium pipe L5.
  • the first heat exchanger 6 may or may not be used.
  • the power generation system 2 uses the second heat exchanger 7 and the third heat exchanger 8 to perform the Rankine cycle by waste heat of the diesel generator 11 and heat recovery of the BOG compressor 17. Therefore, the floating floating turbine 1 may reduce the amount of seawater used.
  • the second heat exchanger 7 heats the organic medium with fresh water by exchanging heat between the organic medium flowing through the organic medium pipe L1 and the fresh water flowing through the cooling fresh water pipe L6. As a result, the second heat exchanger 7 heats the organic medium by utilizing the waste heat of the diesel generator 11.
  • the third heat exchanger 8 heats the organic medium with the BOG by exchanging heat between the organic medium flowing through the organic medium pipe L1 and the BOG flowing through the BOG pipe L3.
  • the fourth heat exchanger 9 heats the heating medium with seawater by exchanging heat between the seawater flowing through the seawater pipe L4 and the heating medium flowing through the heating medium pipe L5.
  • the fifth heat exchanger 10 cools the fresh water with seawater by exchanging heat between the seawater flowing through the seawater pipe L4 and the fresh water flowing through the cooling fresh water pipe L6.
  • the diesel generator 11 is a generator for supplying the electric power required for the regasification process (for example, the power source of the LNG booster pump 13, the BOG compressor 17, or the heating seawater pump 18) on board. ..
  • the diesel generator 11 is a dual fuel-fired diesel generator that generates electricity by burning heavy oil and BOG supplied from the BOG compressor 17 as fuel.
  • the diesel generator 11 may be another generator that does not use a diesel engine.
  • the recondenser 12 is a pressure vessel for reliquefying (recondensing) a part of the BOG supplied from the BOG compressor 17.
  • the recondenser 12 reliquefies (recondenses) a part of the BOG by utilizing the latent heat of vaporization caused by spraying LNG on the BOG inside the pressurized state.
  • the reliquefied BOG is mixed with the sprayed LNG and sent to the LNG vaporizer 4 by the LNG booster pump 13.
  • the reliquefied BOG may be returned to the LNG tank 15.
  • the LNG booster pump 13 is a pump for boosting the LNG (including the reliquefied BOG) supplied from the recondenser 12 and sending it to the equipment on land via the LNG vaporizer 4.
  • the LNG booster pump 13 determines the design discharge pressure according to the required pressure on the land side.
  • the LNG booster pump 13 has a role as a suction drum that keeps the liquid level above a certain level in order to prevent idle operation.
  • the trim heater 14 heats the regas with the heating medium by exchanging heat between the heating medium flowing through the heating medium pipe L5 and the regas flowing through the regas pipe L7. Since the heating medium is heated by seawater by the fourth heat exchanger 9, the trim heater 14 is a heat exchanger that uses seawater as a heat source for heating.
  • the trim heater 14 heats the regas sent from the LNG vaporizer 4 to the regas pipe L7 to adjust the temperature of the regas.
  • the capacity of the trim heater 14 is determined to meet the required pressure on the land side.
  • the LNG tank 15 is a tank for storing LNG. BOG in which a part of LNG is evaporated and vaporized is accumulated in the upper part of the LNG tank 15.
  • the feed pump 16 is installed on the bottom surface of the LNG tank 15 and is connected to the LNG pipe L2.
  • the feed pump 16 is a pump for sending an amount of LNG required for regas from the LNG tank 15 to the recondenser 12.
  • the BOG compressor 17 is a gas compressor that sucks in the BOG accumulated in the upper part of the LNG tank 15, compresses it, and sends it to the recondenser 12.
  • the BOG compressor 17 is used for pressure control of the LNG tank 15. As the BOG continues to increase, the internal pressure of the LNG tank 15 rises, so the BOG compressor 17 compresses the BOG in order to protect the LNG tank 15.
  • the compressed BOG is sent to the recondenser 12 or incinerated as fuel for the diesel generator 11.
  • the seawater pump 18 for heating is provided in the seawater pipe L4.
  • the heating seawater pump 18 is a pump for taking in seawater from the outboard and sending it to the fourth heat exchanger 9.
  • the heating medium circulation pump 19 is a pump for boosting and circulating the heating medium.
  • the heating medium circulation pump 19 is provided in the heating medium pipe L5.
  • the cooling seawater pump 20 is provided in the seawater pipe L4.
  • the cooling seawater pump 20 is a pump for taking in seawater from the outboard and sending it to the fifth heat exchanger 10.
  • the cooling fresh water booster pump 21 is provided in the cooling fresh water pipe L6.
  • the cooling fresh water booster pump 21 boosts the fresh water used for cooling the diesel generator 11 to sequentially circulate the diesel generator 11, the second heat exchanger 7 of the power generation system 2, and the fifth heat exchanger 10. It is a pump of.
  • the power generation system 2 is composed of a closed cycle of the organic medium flowing through the organic medium pipe L1.
  • the organic medium is heated and vaporized by the heat recovered from the gas wake of the BOG compressor 17, the heat obtained from seawater, and the heat obtained from the waste heat of the diesel generator 11.
  • the difference between those heats and the cold heat obtained from LNG liquefies the organic medium to generate expansion force.
  • the turbo generator 3 converts this expansion force into rotational energy to generate electricity.
  • the organic medium is boosted by the organic medium circulation pump 5 and circulates in the organic medium pipe L1.
  • the third heat exchanger 8 recovers the excess heat given to the BOG pipe L3 by the BOG compressor 17.
  • the first heat exchanger 6 takes in heat from seawater through the heating medium.
  • This heating medium takes in heat from seawater via the fourth heat exchanger 9.
  • the second heat exchanger 7 recovers the waste heat given to the fresh water for cooling the diesel generator 11.
  • FIG. 2 is a Ts diagram showing the temperature / specific enthalpy of the organic medium used in the ORC of the power generation system 2 according to the present embodiment. Further, FIG. 2 shows the saturation curve Cs of the organic medium.
  • the organic medium output from the LNG vaporizer 4 is boosted by the organic medium circulation pump 5 to circulate the organic medium pipe L1 so as to execute ORC (state P5).
  • the organic medium is heated by the first heat exchanger 6 and the third heat exchanger 8 in two phases of liquid or gas (states P6 and P8). While the BOG compressor 17 is in operation, the organic medium passes through the third heat exchanger 8 in order to recover the heat of the wake of the BOG compressor 17 (state P8). While the BOG compressor 17 is stopped, the organic medium passes through a bypass that does not pass through the third heat exchanger 8.
  • the organic medium is heated by the second heat exchanger 7 that utilizes the waste heat of the diesel generator 11. As a result, at least a part of the liquid state (state P7a) is finally vaporized (state P7b).
  • the vaporized organic medium enters the turbo generator 3 in a high temperature and high pressure state (state P3), performs work (power generation), and returns to the LNG vaporizer 4. At this time, the organic medium returns from the gaseous state (state P4a) to the liquid state (state P4b).
  • the LNG in the LNG tank 15 is sent to the recondenser 12 by the feed pump 16. Further, the BOG accumulated in the upper part of the LNG tank 15 is sent to the recondenser 12 via the third heat exchanger 8 by the BOG compressor 17. Therefore, the temperature of the BOG is lowered by the third heat exchanger 8 before being sent to the recondenser 12.
  • the LNG sent by the feed pump 16 is sprayed, and a part of the BOG sent from the BOG compressor 17 is reliquefied.
  • the reliquefaction efficiency is improved, and the recondenser 12 can reliquefy more BOG.
  • the reliquefied BOG and the LNG sent from the LNG tank 15 are boosted to a predetermined pressure by the LNG booster pump 13 and sent to the LNG vaporizer 4.
  • the LNG vaporizer 4 regasses the fed LNG and sends it to the trim heater 14.
  • the trim heater 14 regulates the temperature of the sent natural gas and sends it to the equipment on land.
  • the power generation system 2 is a closed-loop type that heats LNG using steam as a heat source, but an indirect heating system that regasifies an organic medium by using the heat source of seawater (water in the natural environment) via an intermediate medium. Since it is adopted, it also has the advantage of an open loop type.
  • fuel consumption and carbon dioxide emissions can be suppressed compared to the closed-loop type that regasifies without using the heat source of seawater.
  • the indirect heating system it is possible to suppress the influence on the natural environment (for example, the ecosystem) due to the decrease in seawater temperature due to the cold heat of LNG. Further, it is possible to avoid the risk of seawater circulating in each device (LNG vaporizer 4 or the like) of the floating floating equipment 1 (for example, damage to the tube due to freezing of seawater).
  • the power generation system 2 performs LNG cryogenic power generation using LNG cold heat, the LNG cold heat flowing into the seawater can be further reduced.
  • the energy efficiency of the power generation system 2 is improved, and the diesel generator 11 is discharged as seawater. Waste heat can be reduced. As a result, it is possible to suppress the influence on the natural environment due to the rise in seawater temperature.
  • the energy efficiency of the power generation system 2 is improved and the reliquefaction efficiency by the recondenser 12 is improved by providing the third heat exchanger 8 for heating the organic medium by BOG. Can be done.
  • the internal pressure of the LNG tank 15 can be efficiently reduced, and the amount of BOG incinerated can be reduced.
  • the floating floating equipment 1 can suppress the influence on the natural environment and reduce the energy required for the operation as the FSRU.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
PCT/JP2020/020924 2019-05-28 2020-05-27 水上浮体式設備 WO2020241688A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202080039708.1A CN113891830A (zh) 2019-05-28 2020-05-27 一种水上漂浮装置
SG11202113061YA SG11202113061YA (en) 2019-05-28 2020-05-27 Water-borne floating facility
KR1020217038618A KR102631877B1 (ko) 2019-05-28 2020-05-27 수상 부체식 설비

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-099650 2019-05-28
JP2019099650A JP6833908B2 (ja) 2019-05-28 2019-05-28 水上浮体式設備

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WO2020241688A1 true WO2020241688A1 (ja) 2020-12-03

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JP (1) JP6833908B2 (zh)
KR (1) KR102631877B1 (zh)
CN (1) CN113891830A (zh)
SG (1) SG11202113061YA (zh)
WO (1) WO2020241688A1 (zh)

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JP2022137961A (ja) * 2021-03-09 2022-09-22 三菱重工マリンマシナリ株式会社 冷熱回収システムおよび船舶又は浮体
KR20230173698A (ko) 2021-05-25 2023-12-27 가부시키가이샤 쇼센 미츠이 선박
CN115235433B (zh) * 2022-07-19 2024-05-28 中船（浙江）海洋科技有限公司 一种海洋环境观测装置

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JP2005214313A (ja) * 2004-01-30 2005-08-11 Mitsui Eng & Shipbuild Co Ltd ボイルオフガス処理システム
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KR102631877B1 (ko) 2024-01-30
JP6833908B2 (ja) 2021-02-24
KR20220002513A (ko) 2022-01-06
JP2020192895A (ja) 2020-12-03
CN113891830A (zh) 2022-01-04

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