WO2016114515A1 - Ship, and method for supplying fuel gas - Google Patents

Ship, and method for supplying fuel gas Download PDF

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Publication number
WO2016114515A1
WO2016114515A1 PCT/KR2015/014505 KR2015014505W WO2016114515A1 WO 2016114515 A1 WO2016114515 A1 WO 2016114515A1 KR 2015014505 W KR2015014505 W KR 2015014505W WO 2016114515 A1 WO2016114515 A1 WO 2016114515A1
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WO
WIPO (PCT)
Prior art keywords
gas
storage tank
liquefied gas
liquefied
tank
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PCT/KR2015/014505
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French (fr)
Korean (ko)
Inventor
이원두
윤호병
Original Assignee
삼성중공업 주식회사
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Priority claimed from KR1020150104849A external-priority patent/KR101711975B1/en
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to JP2017536835A priority Critical patent/JP6506402B2/en
Priority to CN201580073249.8A priority patent/CN107429634B/en
Publication of WO2016114515A1 publication Critical patent/WO2016114515A1/en

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    • 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
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the present invention relates to a ship and a fuel gas supply method.
  • Ethane extracted from shale gas and liquefied natural gas (LNG) is used as a raw material for petrochemical products, and recently, its economic feasibility has been highlighted.
  • LNG liquefied natural gas
  • ethane has a boiling point of approximately -88.6 ° C and methane, the major constituent of LNG, approximately -161.5 ° C.
  • the vessel may be provided with a fuel gas supply system for converting the pressure, temperature, state, etc. of the LNG boil-off gas (BOG, Boil-Off Gas) received from the storage tank and supplied to the engine.
  • the vessel may include a low pressure gas injection engine such as a dual fuel disel electric (DFDE) engine that uses two or more different fuels as fuel, and a high pressure gas injection engine such as a ME-GI engine (Gas Injection engine of Man B & W).
  • DFDE dual fuel disel electric
  • ME-GI engine Gas Injection engine of Man B & W
  • Korean Patent Publication No. 10-2008-0103500 (published on November 27, 2008) has proposed a fuel gas supply system capable of supplying fuel to a high pressure gas injection engine such as a ME-GI engine.
  • the system extracts LNG from the LNG fuel tank, compresses it to high pressure, vaporizes it and supplies it to the high pressure gas injection engine.
  • Korean Patent Laid-Open Publication No. 10-2010-0110500 discloses a technology for performing a cooling operation after deactivating a storage tank using nitrogen.
  • the storage tank After the cooling operation, the storage tank is filled with liquefied gas, and the liquefied gas stored in the storage tank is used as the engine fuel. After the liquefied gas stored in the storage tank is exhausted, the same type of liquefied gas is refilled in the storage tank.
  • the conventional fuel gas supply system has a structure in which liquefied gas and liquefied gas boil-off gas stored in a plurality of storage tanks are used as engine fuel. Accordingly, there is a technically difficult aspect in that the engine fuel gas supply is continuously performed by the liquefied gas stored in the remaining storage tank in a state in which some storage tanks are converted for cargo shipment for heterogeneous liquefied gas storage.
  • the embodiment of the present invention preferentially exhausts the liquefied gas of the storage tank to which heterogeneous liquefied gas is to be loaded as the engine fuel, and the remaining storage tank is exhausted only the liquefied gas boiled gas as the engine fuel, thereby allowing the heterogeneous liquefied gas to the corresponding storage tank. Even after the shipment, the engine fuel is continuously supplied through the liquefied gas and the liquefied gas boil-off gas stored in the remaining storage tanks, thereby providing a ship and fuel gas supply method that improves the efficiency of cargo loading and vessel operation.
  • the storage tank for storing the first liquefied gas and the boil-off gas of the first liquefied gas;
  • a preliminary tank storing a second liquefied gas and an evaporated gas of the second liquefied gas;
  • An inert gas device for inerting the inert gas into the storage tank;
  • a cooling device for cooling by spraying the second liquefied gas supplied from the preliminary tank on the inner wall of the storage tank for cooling.
  • the reserve tank is a pressure tank, the reserve tank can be installed on the deck.
  • the first liquefied gas is liquefied ethane
  • the second liquefied gas may include any one of liquefied ethylene, liquefied petroleum gas, liquefied propane, and liquefied butane.
  • the first liquefied gas and the second liquefied gas may be different in kind.
  • inerting is performed by injecting an inert gas into the first storage tank and supplying the first liquefied gas of the second storage tank to the engine. step;
  • cooling the first storage tank by injecting a second liquefied gas supplied from a preliminary tank onto an inner wall of the first storage tank after performing the inner heating.
  • the method may further include incineration of the inert gas existing in the first storage tank and the boil-off gas of the injected second liquefied gas.
  • the second liquefied gas stored in the preliminary tank may be the same kind as the liquefied gas to be shipped to the first storage tank.
  • the ship and fuel gas supply method by first consuming the liquefied gas of the storage tank to be loaded with different liquefied gas as the engine fuel, the remaining storage tank by exhausting only the liquefied gas evaporated gas as the engine fuel, Even after heterogeneous liquefied gas is shipped to the storage tank, the engine fuel is continuously supplied through the liquefied gas and the liquefied gas boil-off gas stored in the remaining storage tanks, thereby increasing the efficiency of cargo loading and vessel operation.
  • FIG. 1 shows a fuel gas supply system according to an embodiment of the present invention.
  • FIG. 2 shows a form further including a configuration for performing inactivation and cooling operations on the first storage tank in the fuel gas supply system illustrated in FIG. 1.
  • FIGS. 1 and 2 are flowchart of a fuel gas supply method using the fuel gas supply system illustrated in FIGS. 1 and 2.
  • FIG. 2 separately illustrates a configuration of performing inactivation and cooling operations on the first storage tank 110 to facilitate understanding.
  • These fuel gas supply systems include various liquefied fuel carriers, liquefied fuel RV (Regasification Vessel), container ships, commercial ships, LNG FPSO (Floating, Production, Storage and Off-loading), LNG Floating Storage and Regasification Unit (FSRU), etc. It can be applied to the containing vessel.
  • the first liquefied gas to be described below may be liquefied ethane
  • the second liquefied gas may be any one of liquefied ethylene, liquefied petroleum gas, liquefied propane, and liquefied butane.
  • the present invention is not limited thereto, and the first liquefied gas may be liquefied natural gas, and the second liquefied gas may be liquefied ethane.
  • the first storage tank 110 and the second storage tank 120 may store the first liquefied gas and the evaporated gas of the first liquefied gas, and may export the first liquefied gas by the internal pumps P1 and P2.
  • the first storage tank 110 and the second storage tank 120 may include, for example, a membrane tank, an SPB tank.
  • the first liquefied gas and the first liquefied gas boil-off gas stored in the first storage tank 110 and the second storage tank 120 may be used as fuel of the engine 190.
  • the engine 190 may include a low pressure, medium pressure or high pressure gas injection engine.
  • the low pressure gas injection engine uses a fuel gas of about 5 to 7 bar and includes a power generation engine such as a DFDE engine.
  • Low pressure gas injection engine may be a dual fuel engine that can use not only natural gas but also heavy fuel oil (HFO).
  • the medium pressure gas injection engine uses about 16 to 45 bar of fuel gas.
  • the high pressure gas injection engine uses a fuel gas of about 150 to 300 bar and includes a ME-GI engine.
  • the processor 180 may include devices for adjusting one or more of a pressure, a temperature, and a state of a fluid according to a fuel gas supply condition of the engine 190.
  • the fluid includes one or more of liquefied gas and liquefied gas boil off gas.
  • the engine 190 is a low pressure gas injection engine such as a DFDE engine
  • a vaporizer for vaporizing the processing unit 180
  • a pressure reducing valve for reducing the fluid passed through the vaporizer to the fuel gas supply pressure of the low pressure gas injection engine
  • a pressure reducing valve It may include devices such as a heater for correcting the temperature of the fluid through the low pressure gas to the required temperature of the injection engine.
  • the processor 180 may include a high pressure pump that pressurizes and delivers a fluid according to the fuel gas supply pressure of the high pressure gas injection engine, and a high pressure that vaporizes the pressurized fluid. Devices such as vaporizers and the like.
  • the preliminary tank 130 stores a second liquefied gas different from the first liquefied gas and an evaporated gas of the second liquefied gas.
  • the second liquefied gas stored in the preliminary tank 130 is the same kind as the liquefied gas cargo to be shipped to the first storage tank 110.
  • the liquefied gas (ie, the second liquefied gas) to be shipped to the first storage tank 110 is stored in the preliminary tank 130 in advance, and thus the first storage tank 110 that has exhausted the first liquefied gas during ship operation. Cooling may be performed in advance using the second liquefied gas.
  • the first storage tank 110 is quite large, it may take a long time to perform the deactivation operation and the cooling operation.
  • the preliminary tank 130 may be provided to complete the cooling operation with the second liquefied gas to be shipped to the first storage tank 110 during the ship operation, thereby enabling efficient cargo loading operation and the like.
  • the second liquefied gas stored in the preliminary tank 130 is injected into the first storage tank 110 by the inert gas device 140, which will be described later, to perform inerting, and then to the pump 132.
  • the supply line (L6) may be sent to the cooling device 150 of the first storage tank 110.
  • the preliminary tank 130 may be a pressure type C tank of the International Maritime Organization (IMO), and may be implemented as various types of pressure tanks.
  • IMO International Maritime Organization
  • the second liquefied gas boil-off gas may be held for a considerable time without performing the second liquefied gas boil-off gas treatment.
  • the first and second storage tanks 110 and 120 may be manufactured in the form of a large sized insulated membrane in order to ship cargo and may be disposed inside the ship.
  • the preliminary tank 130 in which the cargo for the cooling operation is shipped may be disposed on the ship deck is very small compared to the first and second storage tanks (110, 120). Since the preliminary tank 130 does not occupy the internal space of the vessel in which the first and second storage tanks 110 and 120 are disposed, the first and second storage tanks 110 and 120 may accommodate a large amount of liquefied gas. It can be designed and installed easily inside the ship.
  • the inert gas device 140 inerts the inert gas into the first storage tank 110 through the supply line L7 to perform inerting.
  • nitrogen may be used as the inert gas, and after the first liquefied gas in the first storage tank 110 is exhausted, the inert gas is injected into the first storage tank 110 by the inert gas device 140 to generate the first inert gas.
  • the possibility of fire or explosion in the storage tank 110 can be eliminated.
  • the cooling device 150 is provided inside the first storage tank 110 and injects the second liquefied gas supplied from the preliminary tank 130 to the inner wall of the first storage tank 110. Since the temperature in the first storage tank 110 in which the inert gas is injected by the inert gas device 140 is higher than the temperature of the second liquefied gas, the second liquefied gas is injected into the first storage tank 110. In this case, vaporization of the second liquefied gas may occur.
  • the boil-off gas and the inert gas of the second liquefied gas may exist together in the first storage tank 110.
  • Such gas present in the first storage tank 110 may be discharged to the outside or sent to the customer 170 through the discharge line (L5).
  • the customer 170 may include, for example, a boiler, a combustion device, a turbine, and the like.
  • the pressurizer 172 and the cooler 174 for pressurizing and cooling the gas supplied from the first storage tank 110 to adjust the pressure and temperature range required by the customer 170 is provided in the discharge line (L5).
  • Pressurizer 172 and cooler 174 may be installed in multiple stages in other examples.
  • the controller 160 controls the first liquefied gas and the first liquefied gas boil-off gas of the first storage tank 110 and the first liquefied gas boil-off gas of the second storage tank 120 to the engine 190. After the first liquefied gas of the first storage tank 110 is exhausted, the first liquefied gas and the first liquefied gas boil-off gas of the second storage tank 120 are supplied to the engine 190 as fuel. .
  • the fuel gas supply system described above includes a first supply line L1 for supplying the first liquefied gas boil-off gas of the first storage tank 110 toward the engine 190 through the processing unit 180, and the first storage tank.
  • the second supply line (L2) for supplying the first liquefied gas of 110 to the engine 190 through the processing unit 180, and the first liquefied gas boil-off gas of the second storage tank 120, the first supply line It may include a third supply line (L3) for supplying to (L1), and a fourth supply line (L4) for supplying the first liquefied gas of the second storage tank 120 to the second supply line (L2). .
  • the controller 160 is a valve so that the first liquefied gas and the first liquefied gas boiled gas of the first storage tank 110 and the first liquefied gas boiled gas of the second storage tank 120 is supplied to the engine 190 fuel,
  • the fourth supply line L4 is closed by controlling V4, and the valves V1 to V3 are controlled to open the first supply line L1 to the third supply line L3.
  • the controller 160 when the first liquefied gas in the first storage tank 110 is exhausted, the first liquefied gas and the first liquefied gas boil-off gas of the second storage tank 120 is used as the engine 190 fuel To be supplied, the valves V1 and V2 are controlled to close the first and second supply lines L2 and the valves V3 and V4 are controlled to open the third and fourth supply lines L4. .
  • the first liquefied gas and the first liquefied gas boil-off gas of the first storage tank 110 and the first liquefied gas boil-off gas of the second storage tank 120 are supplied to the engine 190 fuel.
  • the first liquefied gas may include, for example, liquefied ethane.
  • the inert gas is injected into the first storage tank 110 by the inert gas device 140 to perform inerting (S21).
  • the first liquefied gas stored in the second storage tank 120 may be supplied as the engine 190 fuel.
  • the second liquefied gas supplied from the preliminary tank 130 installed on the ship deck by the cooling device 150 installed in the first storage tank 110 is sprayed on the inner wall of the first storage tank 110 to cool.
  • the second liquefied gas is of a different kind from the first liquefied gas, and may include any one of liquefied ethylene, liquefied petroleum gas, liquefied propane, and liquefied butane.
  • the inert gas existing in the first storage tank 110 and the boil-off gas of the second liquefied gas injected on the inner wall of the first storage tank 110 are sent to the demand destination 170 for incineration (S41).
  • the demand source 170 may be a combustion device.
  • the liquefied gas of the same kind as the above-described second liquefied gas to the first storage tank 110 is shipped as a cargo (S51).
  • the liquefied gas shipped as cargo to the first storage tank 110 may be supplied to the supply source.
  • the first liquefied gas and the first liquefied gas boil-off gas stored in the second storage tank 120 are supplied as the engine 190 fuel (S61).
  • This process (S61) may be performed after the first liquefied gas of the first storage tank 110 is exhausted as described above.
  • the liquefied gas of the storage tank to which heterogeneous liquefied gas will be shipped is first consumed with engine fuel, and the remaining storage tank is exhausted with only the liquefied gas boiled gas as the engine fuel, even after heterogeneous liquefied gas is shipped to the storage tank.
  • the liquefied gas and liquefied gas boil-off gas stored in the remaining storage tanks can be continuously supplied to the engine fuel, thereby increasing the efficiency of cargo loading and vessel operation.

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

Abstract

A ship, and a method for supplying fuel gas are disclosed. The ship according to one embodiment of the present invention can comprise: a storage tank for storing a first liquefied gas and a boil-off gas of the first liquefied gas; a reserve tank for storing a second liquefied gas and a boil-off gas of the second liquefied gas; an inert gas device for injecting an inert gas into the storage tank so as to perform inerting; and a cooling device for spraying the second liquefied gas, supplied from the reserve tank, at the inner wall of the storage tank so as to cool the same.

Description

선박 및 연료가스 공급방법Vessel and fuel gas supply method
본 발명은 선박 및 연료가스 공급방법에 관한 것이다.The present invention relates to a ship and a fuel gas supply method.
셰일가스(Shale Gas) 및 액화천연가스(Liquefied Natural Gas, 이하 ‘LNG’라 함) 등으로부터 추출된 에탄(Ethane)은 석유화학제품의 원료로 사용되며, 최근에는 그 경제성이 부각되고 있다. 1기압에서 에탄은 대략 ―88.6℃, LNG의 주요 구성 성분인 메탄은 대략 ―161.5℃의 끊는점을 갖는다. 이러한 에탄과 LNG는 액화된 상태로 선박에 의해 수송될 수 있다.Ethane extracted from shale gas and liquefied natural gas (LNG) is used as a raw material for petrochemical products, and recently, its economic feasibility has been highlighted. At 1 atm, ethane has a boiling point of approximately -88.6 ° C and methane, the major constituent of LNG, approximately -161.5 ° C. These ethane and LNG can be transported by ship in a liquefied state.
선박은 저장탱크로부터 공급받은 LNG 증발가스(BOG, Boil-Off Gas) 또는 LNG의 압력, 온도, 상태 등을 변환하여 엔진으로 공급하는 연료가스 공급시스템을 구비할 수 있다. 여기서, 선박은 둘 이상의 이종연료를 연료로서 사용하는 DFDE(Dual Fuel Disel Electric) 엔진과 같은 저압가스 분사엔진과 ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압가스 분사엔진 등을 포함할 수 있다. 예컨대, 한국공개특허 제10-2008-0103500호(2008. 11. 27. 공개)는 ME-GI 엔진과 같은 고압가스 분사엔진으로 연료를 공급할 수 있는 연료가스 공급시스템을 제시한 바 있다. 이 시스템은 LNG 연료탱크로부터 LNG를 빼내어 고압으로 압축한 후 이를 기화시켜서 고압가스 분사엔진으로 공급한다. The vessel may be provided with a fuel gas supply system for converting the pressure, temperature, state, etc. of the LNG boil-off gas (BOG, Boil-Off Gas) received from the storage tank and supplied to the engine. Here, the vessel may include a low pressure gas injection engine such as a dual fuel disel electric (DFDE) engine that uses two or more different fuels as fuel, and a high pressure gas injection engine such as a ME-GI engine (Gas Injection engine of Man B & W). Can be. For example, Korean Patent Publication No. 10-2008-0103500 (published on November 27, 2008) has proposed a fuel gas supply system capable of supplying fuel to a high pressure gas injection engine such as a ME-GI engine. The system extracts LNG from the LNG fuel tank, compresses it to high pressure, vaporizes it and supplies it to the high pressure gas injection engine.
한편, 종래에는 저장탱크에 액화가스를 선적하기 이전에 화재나 폭발 가능성을 없애기 위해 불활성 가스를 액화가스 저장탱크의 내부에 공급하여 산소를 제거한다. 그리고, 쿨링장치를 이용하여 저장탱크 내벽을 쿨링시키는 과정을 수행한다. 예컨대, 한국공개특허 제10-2010-0110500호(2010.10.13. 공개)는 질소를 이용하여 저장탱크를 불활성화한 후, 쿨링 작업을 수행하는 기술을 공개한 바 있다. On the other hand, prior to shipping the liquefied gas to the storage tank in order to eliminate the possibility of fire or explosion inert gas is supplied to the interior of the liquefied gas storage tank to remove oxygen. Then, a process of cooling the inner wall of the storage tank by using a cooling device is performed. For example, Korean Patent Laid-Open Publication No. 10-2010-0110500 (published on October 13, 2010) discloses a technology for performing a cooling operation after deactivating a storage tank using nitrogen.
쿨링 작업이 이루어진 후에는, 저장탱크에 액화가스를 채우고, 저장탱크에 저장된 액화가스를 엔진 연료로 사용하게 된다. 저장탱크에 저장된 액화가스를 소진한 이후에는 다시 저장탱크에 동일한 종류의 액화가스를 다시 채우게 된다. After the cooling operation, the storage tank is filled with liquefied gas, and the liquefied gas stored in the storage tank is used as the engine fuel. After the liquefied gas stored in the storage tank is exhausted, the same type of liquefied gas is refilled in the storage tank.
그러나, 복수의 저장탱크 중 일부 저장탱크에 엔진 연료로 소진한 액화가스와 다른 이종의 액화가스를 화물로 선적할 필요성이 있는 경우, 이종의 액화가스를 이용하여 해당 저장탱크에 대해 쿨링 작업을 수행하여야 한다. 이때, 저장탱크의 크기를 고려할 때 선박 정박 후 쿨링 작업에 상당한 시간이 소요되므로, 화물 선적 및 선박 운항에 지장을 줄 수 있다.However, when there is a need to load liquefied gas exhausted from engine fuel and other liquefied gas as cargo in some storage tanks among a plurality of storage tanks, cooling operation is performed on the corresponding storage tank using heterogeneous liquefied gas. shall. At this time, considering the size of the storage tank takes a considerable time for cooling work after anchoring the vessel, it may interfere with the cargo loading and vessel operation.
또, 종래의 연료가스 공급시스템은 복수의 저장탱크에 저장된 액화가스와 액화가스 증발가스가 엔진 연료로 사용되는 구조이다. 따라서, 일부 저장탱크가 이종 액화가스 저장을 위한 화물 선적용으로 전환된 상태에서, 나머지 저장탱크에 저장된 액화가스에 의해 엔진 연료 가스 공급이 지속적으로 이루어지도록 하는 데에 기술적으로 어려운 측면이 있다.In addition, the conventional fuel gas supply system has a structure in which liquefied gas and liquefied gas boil-off gas stored in a plurality of storage tanks are used as engine fuel. Accordingly, there is a technically difficult aspect in that the engine fuel gas supply is continuously performed by the liquefied gas stored in the remaining storage tank in a state in which some storage tanks are converted for cargo shipment for heterogeneous liquefied gas storage.
본 발명의 실시 예는 이종의 액화가스가 선적될 저장탱크의 액화가스를 엔진 연료로 우선적으로 소진시키고, 나머지 저장탱크는 액화가스 증발가스만 엔진 연료로 소진시킴으로써, 해당 저장탱크에 이종의 액화가스가 선적된 이후에도 나머지 저장탱크에 저장된 액화가스 및 액화가스 증발가스를 통해 엔진 연료 공급이 지속적으로 이루어지도록 하여, 화물 선적 및 선박 운항의 효율성을 높이는 선박 및 연료가스 공급방법을 제공하고자 한다.The embodiment of the present invention preferentially exhausts the liquefied gas of the storage tank to which heterogeneous liquefied gas is to be loaded as the engine fuel, and the remaining storage tank is exhausted only the liquefied gas boiled gas as the engine fuel, thereby allowing the heterogeneous liquefied gas to the corresponding storage tank. Even after the shipment, the engine fuel is continuously supplied through the liquefied gas and the liquefied gas boil-off gas stored in the remaining storage tanks, thereby providing a ship and fuel gas supply method that improves the efficiency of cargo loading and vessel operation.
또, 선박 운항 중에 이종의 액화가스가 선적될 저장탱크에 대해 미리 불활성화 작업 및 쿨링 작업을 수행하여, 화물 선적 작업의 효율성을 높이는 선박 및 연료가스 공급방법을 제공하고자 한다.In addition, it is intended to provide a ship and fuel gas supply method to increase the efficiency of the cargo loading operation by performing the deactivation operation and cooling operation for the storage tank to be heterogeneous liquefied gas to be shipped during the ship operation.
본 발명의 일 측면에 따르면, 제1액화가스와 상기 제1액화가스의 증발가스를 저장하는 저장탱크; 제2액화가스와 상기 제2액화가스의 증발가스를 저장하는 예비탱크; 상기 저장탱크에 불활성 가스를 주입하여 이너팅(inerting)을 수행하는 불활성 가스장치; 및 상기 예비탱크로부터 공급받은 제2액화가스를 상기 저장탱크 내벽에 분사하여 쿨링시키는 쿨링장치;를 포함하는 선박이 제공될 수 있다.According to an aspect of the invention, the storage tank for storing the first liquefied gas and the boil-off gas of the first liquefied gas; A preliminary tank storing a second liquefied gas and an evaporated gas of the second liquefied gas; An inert gas device for inerting the inert gas into the storage tank; And a cooling device for cooling by spraying the second liquefied gas supplied from the preliminary tank on the inner wall of the storage tank for cooling.
상기 예비탱크는 압력식 탱크이고, 상기 예비탱크는 데크 상에 설치될 수 있다.The reserve tank is a pressure tank, the reserve tank can be installed on the deck.
상기 제1액화가스는 액화에탄이고, 상기 제2액화가스는 액화에틸렌, 액화석유가스, 액화프로판, 및 액화부탄 중 어느 하나를 포함할 수 있다.The first liquefied gas is liquefied ethane, and the second liquefied gas may include any one of liquefied ethylene, liquefied petroleum gas, liquefied propane, and liquefied butane.
상기 제1액화가스와 상기 제2액화가스는 종류가 상이할 수 있다.The first liquefied gas and the second liquefied gas may be different in kind.
본 발명의 다른 측면에 따르면, 제1저장탱크의 제1액화가스와 상기 제1액화가스 증발가스 및 제2저장탱크의 제1액화가스 증발가스를 엔진으로 공급하는 단계; 상기 제1저장탱크의 제1액화가스가 소진되면, 상기 제1저장탱크에 불활성 가스를 주입하여 이너팅(inerting)을 수행하고, 상기 제2저장탱크의 제1액화가스를 상기 엔진으로 공급하는 단계; 및 상기 이너팅을 수행한 이후, 예비탱크로부터 공급받은 제2액화가스를 상기 제1저장탱크 내벽에 분사하여 상기 제1저장탱크를 쿨링시키는 단계;를 포함하는 연료가스 공급방법이 제공될 수 있다.According to another aspect of the invention, supplying a first liquefied gas of the first storage tank and the first liquefied gas boiled gas and the first liquefied gas boiled gas of the second storage tank to the engine; When the first liquefied gas of the first storage tank is exhausted, inerting is performed by injecting an inert gas into the first storage tank and supplying the first liquefied gas of the second storage tank to the engine. step; And cooling the first storage tank by injecting a second liquefied gas supplied from a preliminary tank onto an inner wall of the first storage tank after performing the inner heating. .
상기 제1저장탱크에 존재하는 불활성 가스 및 상기 분사된 제2액화가스의 증발가스를 소각하는 단계를 더 포함할 수 있다.The method may further include incineration of the inert gas existing in the first storage tank and the boil-off gas of the injected second liquefied gas.
상기 예비탱크에 저장된 제2액화가스는 상기 제1저장탱크에 선적될 액화가스와 동일한 종류일 수 있다.The second liquefied gas stored in the preliminary tank may be the same kind as the liquefied gas to be shipped to the first storage tank.
본 발명의 실시 예에 따른 선박 및 연료가스 공급방법은 이종의 액화가스가 선적될 저장탱크의 액화가스를 엔진 연료로 우선적으로 소진시키고, 나머지 저장탱크는 액화가스 증발가스만 엔진 연료로 소진시킴으로써, 해당 저장탱크에 이종의 액화가스가 선적된 이후에도 나머지 저장탱크에 저장된 액화가스 및 액화가스 증발가스를 통해 엔진 연료 공급이 지속적으로 이루어지도록 하여, 화물 선적 및 선박 운항의 효율성을 높일 수 있다.In the ship and fuel gas supply method according to an embodiment of the present invention by first consuming the liquefied gas of the storage tank to be loaded with different liquefied gas as the engine fuel, the remaining storage tank by exhausting only the liquefied gas evaporated gas as the engine fuel, Even after heterogeneous liquefied gas is shipped to the storage tank, the engine fuel is continuously supplied through the liquefied gas and the liquefied gas boil-off gas stored in the remaining storage tanks, thereby increasing the efficiency of cargo loading and vessel operation.
또, 선박 운항 중에 이종의 액화가스가 선적될 저장탱크에 대해 미리 불활성화 작업 및 쿨링 작업을 수행하여, 화물 선적 작업의 효율성을 높일 수 있다.In addition, by deactivating and cooling the storage tank to be heterogeneous liquefied gas to be shipped in advance, it is possible to increase the efficiency of the cargo loading operation.
본 발명의 효과들은 이상에서 언급한 효과들로 제한되지 않으며, 언급되지 않은 또 다른 효과들은 청구범위의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.
도 1은 본 발명의 실시 예에 따른 연료가스 공급시스템을 나타낸다.1 shows a fuel gas supply system according to an embodiment of the present invention.
도 2는 도 1에 도시된 연료가스 공급시스템에서 제1저장탱크에 대해 불활성화 및 쿨링 작업을 수행하는 구성을 더 포함시킨 형태를 나타낸다.FIG. 2 shows a form further including a configuration for performing inactivation and cooling operations on the first storage tank in the fuel gas supply system illustrated in FIG. 1.
도 3은 도 1과 도 2에 도시된 연료가스 공급시스템을 이용한 연료가스 공급방법의 순서도이다.3 is a flowchart of a fuel gas supply method using the fuel gas supply system illustrated in FIGS. 1 and 2.
이하에서는 본 발명의 실시 예들을 첨부 도면을 참조하여 상세히 설명한다. 이하에 소개되는 실시 예들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 본 발명의 사상이 충분히 전달될 수 있도록 하기 위해 예로서 제공되는 것이다. 본 발명은 이하 설명되는 실시 예들에 한정되지 않고 다른 형태로 구체화될 수도 있다. 본 발명을 명확하게 설명하기 위하여 설명과 관계없는 부분은 도면에서 생략하였으며 도면들에 있어서, 구성요소의 폭, 길이, 두께 등은 편의를 위하여 과장되어 표현될 수 있다. 명세서 전체에 걸쳐서 동일한 참조번호들은 동일한 구성요소들을 나타낸다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as an example to sufficiently convey the spirit of the present invention to those skilled in the art to which the present invention pertains. The present invention is not limited to the embodiments described below and may be embodied in other forms. Parts not related to the description are omitted in the drawings in order to clearly describe the present invention, in the drawings, the width, length, thickness, etc. of the components may be exaggerated for convenience. Like numbers refer to like elements throughout.
도 1과 도 2를 참조하면, 본 발명의 실시 예에 따른 연료가스 공급시스템은 제1저장탱크(110), 제2저장탱크(120), 예비탱크(130), 불활성 가스장치(140), 쿨링장치(150) 및 제어부(160)를 포함한다. 여기서, 도 2는 이해를 돕기 위해 제1저장탱크(110)에 대해 불활성화 및 쿨링 작업을 수행하는 구성을 따로 도시한 것이다.1 and 2, the fuel gas supply system according to an embodiment of the present invention, the first storage tank 110, the second storage tank 120, the reserve tank 130, the inert gas device 140, It includes a cooling device 150 and the control unit 160. Here, FIG. 2 separately illustrates a configuration of performing inactivation and cooling operations on the first storage tank 110 to facilitate understanding.
이러한 연료가스 공급시스템은 각종 액화연료 운반선, 액화연료 RV(Regasification Vessel), 컨테이너선, 일반상선, LNG FPSO(Floating, Production, Storage and Off-loading), LNG FSRU(Floating Storage and Regasification Unit) 등을 포함하는 선박에 적용될 수 있다. 이하에서 설명될 제1액화가스는 액화에탄, 제2액화가스는 액화에틸렌, 액화석유가스, 액화프로판, 및 액화부탄 중 어느 하나일 수 있다. 그러나 이에 한정되지는 않으며 예컨대 제1액화가스는 액화천연가스, 제2액화가스는 액화에탄일 수 있다.These fuel gas supply systems include various liquefied fuel carriers, liquefied fuel RV (Regasification Vessel), container ships, commercial ships, LNG FPSO (Floating, Production, Storage and Off-loading), LNG Floating Storage and Regasification Unit (FSRU), etc. It can be applied to the containing vessel. The first liquefied gas to be described below may be liquefied ethane, the second liquefied gas may be any one of liquefied ethylene, liquefied petroleum gas, liquefied propane, and liquefied butane. However, the present invention is not limited thereto, and the first liquefied gas may be liquefied natural gas, and the second liquefied gas may be liquefied ethane.
제1저장탱크(110)와 제2저장탱크(120)는 제1액화가스 및 제1액화가스의 증발가스를 저장하며, 내부 펌프(P1,P2)에 의해 제1액화가스를 내보낼 수 있다. 제1저장탱크(110)와 제2저장탱크(120)는 예컨대 멤브레인형 탱크, SPB형 탱크를 포함할 수 있다. 제1저장탱크(110)와 제2저장탱크(120)에 저장된 제1액화가스 및 제1액화가스 증발가스는 엔진(190)의 연료로 사용될 수 있다. 엔진(190)은 저압, 중압 또는 고압가스 분사엔진을 포함할 수 있다. 저압가스 분사엔진은 대략 5 내지 7bar 정도의 연료가스를 이용하는 것으로 DFDE 엔진과 같은 발전용 엔진을 포함한다. 저압가스 분사엔진은 천연가스뿐 아니라 중유(HFO, Heavy Fuel Oil) 등을 연료로 이용할 수 있는 이중연료엔진일 수 있다. 중압가스 분사엔진은 대략 16 내지 45bar 정도의 연료가스를 이용한다. 고압가스 분사엔진은 대략 150 내지 300bar 정도의 연료가스를 이용하는 것으로 ME-GI 엔진을 포함한다.The first storage tank 110 and the second storage tank 120 may store the first liquefied gas and the evaporated gas of the first liquefied gas, and may export the first liquefied gas by the internal pumps P1 and P2. The first storage tank 110 and the second storage tank 120 may include, for example, a membrane tank, an SPB tank. The first liquefied gas and the first liquefied gas boil-off gas stored in the first storage tank 110 and the second storage tank 120 may be used as fuel of the engine 190. The engine 190 may include a low pressure, medium pressure or high pressure gas injection engine. The low pressure gas injection engine uses a fuel gas of about 5 to 7 bar and includes a power generation engine such as a DFDE engine. Low pressure gas injection engine may be a dual fuel engine that can use not only natural gas but also heavy fuel oil (HFO). The medium pressure gas injection engine uses about 16 to 45 bar of fuel gas. The high pressure gas injection engine uses a fuel gas of about 150 to 300 bar and includes a ME-GI engine.
여기서 도 1에 도시한 바와 같이, 처리부(180)는 유체의 압력, 온도, 상태 중 하나 이상을 엔진(190)의 연료가스 공급조건에 맞게 조절하는 장치들을 포함할 수 있다. 유체는 액화가스 및 액화가스 증발가스 중 하나 이상을 포함한다. 예컨대, 엔진(190)이 DFDE 엔진과 같은 저압가스 분사엔진일 경우, 처리부(180) 유체를 기화시키는 기화기, 기화기를 거친 유체를 저압가스 분사엔진의 연료가스 공급압력으로 감압시키는 감압밸브, 감압밸브를 거친 유체를 저압가스 분사엔진의 요구 온도에 맞게 온도를 보정하는 히터 등의 장치들을 포함할 수 있다. 엔진(190)이 ME-GI 엔진과 같은 고압가스 분사엔진일 경우, 처리부(180)는 고압가스 분사엔진의 연료가스 공급압력에 따라 유체를 가압 송출하는 고압펌프와, 가압된 유체를 기화시키는 고압기화기 등과 같은 장치들을 포함할 수 있다.As shown in FIG. 1, the processor 180 may include devices for adjusting one or more of a pressure, a temperature, and a state of a fluid according to a fuel gas supply condition of the engine 190. The fluid includes one or more of liquefied gas and liquefied gas boil off gas. For example, when the engine 190 is a low pressure gas injection engine such as a DFDE engine, a vaporizer for vaporizing the processing unit 180, a pressure reducing valve for reducing the fluid passed through the vaporizer to the fuel gas supply pressure of the low pressure gas injection engine, and a pressure reducing valve It may include devices such as a heater for correcting the temperature of the fluid through the low pressure gas to the required temperature of the injection engine. When the engine 190 is a high pressure gas injection engine such as a ME-GI engine, the processor 180 may include a high pressure pump that pressurizes and delivers a fluid according to the fuel gas supply pressure of the high pressure gas injection engine, and a high pressure that vaporizes the pressurized fluid. Devices such as vaporizers and the like.
도 2를 참조하면, 예비탱크(130)는 제1액화가스와 다른 종류의 제2액화가스 및 제2액화가스의 증발가스를 저장한다. 예비탱크(130)에 저장된 제2액화가스는 제1저장탱크(110)에 선적될 액화가스 화물과 동일한 종류이다. 이와 같이 제1저장탱크(110)에 선적될 액화가스(즉, 제2액화가스)를 예비탱크(130)에 미리 저장시켜 두어, 선박 운항 중에 제1액화가스를 소진한 제1저장탱크(110)에 대해 제2액화가스를 사용하여 미리 쿨링 작업을 수행할 수 있다. 통상적으로 제1저장탱크(110)는 상당히 규모가 크기 때문에, 불활성화 작업 및 쿨링 작업을 수행하는 데에 많은 시간이 소요될 수 있다. 이러한 작업을 선박 정박 후 수행할 경우, 예컨대 선박 운항 및 공급처에 화물을 일정에 따라 공급하는 데에 차질을 줄 수 있다. 따라서, 예비탱크(130)를 마련하여 선박 운항 중에 제1저장탱크(110)에 선적될 제2액화가스로 쿨링 작업까지 모두 완료할 수 있어 효율적인 화물 선적 작업 등이 이루어질 수 있게 된다.Referring to FIG. 2, the preliminary tank 130 stores a second liquefied gas different from the first liquefied gas and an evaporated gas of the second liquefied gas. The second liquefied gas stored in the preliminary tank 130 is the same kind as the liquefied gas cargo to be shipped to the first storage tank 110. In this way, the liquefied gas (ie, the second liquefied gas) to be shipped to the first storage tank 110 is stored in the preliminary tank 130 in advance, and thus the first storage tank 110 that has exhausted the first liquefied gas during ship operation. Cooling may be performed in advance using the second liquefied gas. Typically, since the first storage tank 110 is quite large, it may take a long time to perform the deactivation operation and the cooling operation. If these operations are carried out after berthing, for example, it may interfere with the ship's operations and supply of cargo on schedule. Therefore, the preliminary tank 130 may be provided to complete the cooling operation with the second liquefied gas to be shipped to the first storage tank 110 during the ship operation, thereby enabling efficient cargo loading operation and the like.
예비탱크(130)에 저장된 제2액화가스는 후술할 불활성 가스장치(140)에 의해 불활성 가스가 제1저장탱크(110)에 주입되어 이너팅(inerting)을 수행한 이후, 펌프(132)에 의해 공급라인(L6)을 통해 제1저장탱크(110)의 쿨링장치(150)로 보내질 수 있다.The second liquefied gas stored in the preliminary tank 130 is injected into the first storage tank 110 by the inert gas device 140, which will be described later, to perform inerting, and then to the pump 132. By the supply line (L6) may be sent to the cooling device 150 of the first storage tank 110.
예비탱크(130)는 국제해사기구(IMO, International Maritime Organization)의 압력식 C타입 탱크일 수 있으며, 이외에도 다양한 종류의 압력식 탱크로 구현될 수 있다. 예비탱크(130)가 압력식 탱크로 제작된 경우, 제2액화가스 증발가스 처리를 수행하지 않고도 상당 시간 동안 제2액화가스 증발가스를 홀딩할 수 있다.The preliminary tank 130 may be a pressure type C tank of the International Maritime Organization (IMO), and may be implemented as various types of pressure tanks. When the preliminary tank 130 is manufactured as a pressure tank, the second liquefied gas boil-off gas may be held for a considerable time without performing the second liquefied gas boil-off gas treatment.
제1 및 제2저장탱크(110, 120)는 화물을 선적하기 위하여 큰 사이즈의 단열된 멤브레인 형태로 제작되어 선박 내부에 배치될 수 있다. 반면, 쿨링 작업용 화물이 선적되는 예비탱크(130)는 제1 및 제2저장탱크(110, 120)에 비해 사이즈가 매우 작아 선박 데크 상에 배치될 수 있다. 예비탱크(130)가 제1 및 제2저장탱크(110, 120)가 배치되는 선박의 내부 공간을 차지하지 않으므로, 제1 및 제2저장탱크(110, 120)를 대용량의 액화가스를 수용하도록 설계하여 선박 내부에 용이하게 설치할 수 있다. The first and second storage tanks 110 and 120 may be manufactured in the form of a large sized insulated membrane in order to ship cargo and may be disposed inside the ship. On the other hand, the preliminary tank 130 in which the cargo for the cooling operation is shipped may be disposed on the ship deck is very small compared to the first and second storage tanks (110, 120). Since the preliminary tank 130 does not occupy the internal space of the vessel in which the first and second storage tanks 110 and 120 are disposed, the first and second storage tanks 110 and 120 may accommodate a large amount of liquefied gas. It can be designed and installed easily inside the ship.
불활성 가스장치(140)는 공급라인(L7)을 통해 제1저장탱크(110)로 불활성 가스를 주입하여 이너팅(inerting)을 수행한다. 예컨대, 불활성 가스로서 질소가 사용될 수 있으며, 제1저장탱크(110) 내의 제1액화가스가 소진된 이후, 불활성 가스장치(140)에 의해 제1저장탱크(110) 내에 불활성 가스가 주입되어 제1저장탱크(110) 내의 화재나 폭발 가능성이 제거될 수 있다. The inert gas device 140 inerts the inert gas into the first storage tank 110 through the supply line L7 to perform inerting. For example, nitrogen may be used as the inert gas, and after the first liquefied gas in the first storage tank 110 is exhausted, the inert gas is injected into the first storage tank 110 by the inert gas device 140 to generate the first inert gas. The possibility of fire or explosion in the storage tank 110 can be eliminated.
쿨링장치(150)는 제1저장탱크(110) 내측에 마련되며, 예비탱크(130)로부터 공급받은 제2액화가스를 제1저장탱크(110) 내벽에 분사시킨다. 불활성 가스장치(140)에 의해 불활성 가스가 주입된 제1저장탱크(110) 내의 온도는 제2액화가스의 온도에 비해 높은 상태이므로, 제1저장탱크(110) 내부에 제2액화가스가 분사되면 제2액화가스의 기화가 일어날 수 있다.The cooling device 150 is provided inside the first storage tank 110 and injects the second liquefied gas supplied from the preliminary tank 130 to the inner wall of the first storage tank 110. Since the temperature in the first storage tank 110 in which the inert gas is injected by the inert gas device 140 is higher than the temperature of the second liquefied gas, the second liquefied gas is injected into the first storage tank 110. In this case, vaporization of the second liquefied gas may occur.
따라서, 제1저장탱크(110) 내부에는 제2액화가스의 증발가스와 불활성 가스가 함께 존재할 수 있다. 제1저장탱크(110) 내부에 존재하는 이러한 가스는 외부로 방출되거나 방출라인(L5)을 통해 수요처(170)로 보낼 수 있다. 수요처(170)는 예컨대 보일러, 연소장치, 터빈 등을 포함할 수 있다. 이때, 수요처(170)에서 요구하는 압력 및 온도 범위로 조절하기 위해 제1저장탱크(110)로부터 공급된 가스를 가압 및 냉각하는 가압기(172) 및 쿨러(174)가 방출라인(L5)에 마련될 수 있다. 가압기(172) 및 쿨러(174)는 다른 예에서 다단으로 설치될 수 있다.Therefore, the boil-off gas and the inert gas of the second liquefied gas may exist together in the first storage tank 110. Such gas present in the first storage tank 110 may be discharged to the outside or sent to the customer 170 through the discharge line (L5). The customer 170 may include, for example, a boiler, a combustion device, a turbine, and the like. At this time, the pressurizer 172 and the cooler 174 for pressurizing and cooling the gas supplied from the first storage tank 110 to adjust the pressure and temperature range required by the customer 170 is provided in the discharge line (L5). Can be. Pressurizer 172 and cooler 174 may be installed in multiple stages in other examples.
도 1을 참조하면, 제어부(160)는 제1저장탱크(110)의 제1액화가스와 제1액화가스 증발가스 및 제2저장탱크(120)의 제1액화가스 증발가스를 엔진(190) 연료로 공급하고, 제1저장탱크(110)의 제1액화가스가 소진된 이후에는 제2저장탱크(120)의 제1액화가스와 제1액화가스 증발가스를 엔진(190) 연료로 공급한다.Referring to FIG. 1, the controller 160 controls the first liquefied gas and the first liquefied gas boil-off gas of the first storage tank 110 and the first liquefied gas boil-off gas of the second storage tank 120 to the engine 190. After the first liquefied gas of the first storage tank 110 is exhausted, the first liquefied gas and the first liquefied gas boil-off gas of the second storage tank 120 are supplied to the engine 190 as fuel. .
여기서, 상술한 연료가스 공급시스템은 제1저장탱크(110)의 제1액화가스 증발가스를 처리부(180)를 통해 엔진(190) 쪽으로 공급하는 제1공급라인(L1)과, 제1저장탱크(110)의 제1액화가스를 처리부(180)를 통해 엔진(190) 쪽으로 공급하는 제2공급라인(L2)과, 제2저장탱크(120)의 제1액화가스 증발가스를 제1공급라인(L1)으로 공급하는 제3공급라인(L3)과, 제2저장탱크(120)의 제1액화가스를 제2공급라인(L2)으로 공급하는 제4공급라인(L4)을 포함할 수 있다.Here, the fuel gas supply system described above includes a first supply line L1 for supplying the first liquefied gas boil-off gas of the first storage tank 110 toward the engine 190 through the processing unit 180, and the first storage tank. The second supply line (L2) for supplying the first liquefied gas of 110 to the engine 190 through the processing unit 180, and the first liquefied gas boil-off gas of the second storage tank 120, the first supply line It may include a third supply line (L3) for supplying to (L1), and a fourth supply line (L4) for supplying the first liquefied gas of the second storage tank 120 to the second supply line (L2). .
제어부(160)는 제1저장탱크(110)의 제1액화가스와 제1액화가스 증발가스 및 제2저장탱크(120)의 제1액화가스 증발가스가 엔진(190) 연료로 공급되도록, 밸브(V4)를 제어하여 제4공급라인(L4)이 폐쇄되도록 하고, 밸브(V1~V3)를 제어하여 제1공급라인(L1) 내지 제3공급라인(L3)이 개방되도록 한다. The controller 160 is a valve so that the first liquefied gas and the first liquefied gas boiled gas of the first storage tank 110 and the first liquefied gas boiled gas of the second storage tank 120 is supplied to the engine 190 fuel, The fourth supply line L4 is closed by controlling V4, and the valves V1 to V3 are controlled to open the first supply line L1 to the third supply line L3.
또, 제어부(160)는 제1저장탱크(110) 내의 제1액화가스가 소진된 경우, 제2저장탱크(120)의 제1액화가스와 제1액화가스 증발가스가 엔진(190) 연료로 공급되도록, 밸브(V1,V2)를 제어하여 제1 및 제2공급라인(L2)이 폐쇄되도록 하고, 밸브(V3,V4)를 제어하여 제3 및 제4공급라인(L4)이 개방되도록 한다.In addition, the controller 160, when the first liquefied gas in the first storage tank 110 is exhausted, the first liquefied gas and the first liquefied gas boil-off gas of the second storage tank 120 is used as the engine 190 fuel To be supplied, the valves V1 and V2 are controlled to close the first and second supply lines L2 and the valves V3 and V4 are controlled to open the third and fourth supply lines L4. .
이하, 도 1과 도 2에서 상술한 연료가스 공급시스템을 이용한 연료가스 공급방법에 대해서 도 3을 기초로 설명한다.Hereinafter, a fuel gas supply method using the fuel gas supply system described above with reference to FIGS. 1 and 2 will be described based on FIG. 3.
도 3을 참조하면, 먼저 제1저장탱크(110)의 제1액화가스와 제1액화가스 증발가스 및 제2저장탱크(120)의 제1액화가스 증발가스를 엔진(190) 연료로 공급한다(S11). 제1액화가스는 예컨대 액화에탄을 포함할 수 있다.Referring to FIG. 3, first, the first liquefied gas and the first liquefied gas boil-off gas of the first storage tank 110 and the first liquefied gas boil-off gas of the second storage tank 120 are supplied to the engine 190 fuel. (S11). The first liquefied gas may include, for example, liquefied ethane.
다음으로, 제1저장탱크(110)의 제1액화가스가 소진되면, 불활성 가스장치(140)에 의해 제1저장탱크(110)에 불활성 가스를 주입하여 이너팅(inerting)을 수행한다(S21). 이때, 제2저장탱크(120)에 저장된 제1액화가스가 엔진(190) 연료로 공급될 수 있다.Next, when the first liquefied gas of the first storage tank 110 is exhausted, the inert gas is injected into the first storage tank 110 by the inert gas device 140 to perform inerting (S21). ). In this case, the first liquefied gas stored in the second storage tank 120 may be supplied as the engine 190 fuel.
다음으로, 제1저장탱크(110)에 설치된 쿨링장치(150)에 의해 선박 데크 상에 설치된 예비탱크(130)로부터 공급받은 제2액화가스를 제1저장탱크(110) 내벽에 분사시켜 쿨링시킨다(S31). 제2액화가스는 제1액화가스와 다른 종류이며, 예컨대 액화에틸렌, 액화석유가스, 액화프로판, 및 액화부탄 중 어느 하나를 포함할 수 있다.Next, the second liquefied gas supplied from the preliminary tank 130 installed on the ship deck by the cooling device 150 installed in the first storage tank 110 is sprayed on the inner wall of the first storage tank 110 to cool. (S31). The second liquefied gas is of a different kind from the first liquefied gas, and may include any one of liquefied ethylene, liquefied petroleum gas, liquefied propane, and liquefied butane.
다음으로, 제1저장탱크(110)에 존재하는 불활성 가스 및 제1저장탱크(110) 내벽에 분사된 제2액화가스의 증발가스를 수요처(170)로 보내어 소각시킨다(S41). 여기서, 수요처(170)는 연소장치일 수 있다.Next, the inert gas existing in the first storage tank 110 and the boil-off gas of the second liquefied gas injected on the inner wall of the first storage tank 110 are sent to the demand destination 170 for incineration (S41). Here, the demand source 170 may be a combustion device.
다음으로, 제1저장탱크(110)에 상술한 제2액화가스와 동일한 종류의 액화가스를 화물로 선적한다(S51). 제1저장탱크(110)에 화물로 선적된 액화가스는 공급처에 공급될 수 있다.Next, the liquefied gas of the same kind as the above-described second liquefied gas to the first storage tank 110 is shipped as a cargo (S51). The liquefied gas shipped as cargo to the first storage tank 110 may be supplied to the supply source.
다음으로, 제2저장탱크(120)에 저장된 제1액화가스 및 제1액화가스 증발가스를 엔진(190) 연료로 공급한다(S61). 본 과정(S61)은 상술한 바와 같이 제1저장탱크(110)의 제1액화가스가 소진된 이후 수행될 수도 있다.Next, the first liquefied gas and the first liquefied gas boil-off gas stored in the second storage tank 120 are supplied as the engine 190 fuel (S61). This process (S61) may be performed after the first liquefied gas of the first storage tank 110 is exhausted as described above.
위 과정 중 S21, S31, S41 과정은 선박 운항 중에 수행될 수 있다. 따라서, 선박 운항 중에 이종의 액화가스가 선적될 저장탱크에 대해 미리 불활성화 작업 및 쿨링 작업을 수행하여, 화물 선적 작업의 효율성을 높일 수 있다.S21, S31, S41 process of the above process can be performed during ship operation. Therefore, the deactivation work and the cooling work for the storage tank to which heterogeneous liquefied gas is to be shipped during the ship operation are performed in advance, thereby increasing the efficiency of the cargo loading work.
또, 이종의 액화가스가 선적될 저장탱크의 액화가스를 엔진 연료로 우선적으로 소진시키고, 나머지 저장탱크는 액화가스 증발가스만 엔진 연료로 소진시킴으로써, 해당 저장탱크에 이종의 액화가스가 선적된 이후에도 나머지 저장탱크에 저장된 액화가스 및 액화가스 증발가스를 통해 엔진 연료 공급이 지속적으로 이루어지도록 하여, 화물 선적 및 선박 운항의 효율성을 높일 수 있다.In addition, the liquefied gas of the storage tank to which heterogeneous liquefied gas will be shipped is first consumed with engine fuel, and the remaining storage tank is exhausted with only the liquefied gas boiled gas as the engine fuel, even after heterogeneous liquefied gas is shipped to the storage tank. The liquefied gas and liquefied gas boil-off gas stored in the remaining storage tanks can be continuously supplied to the engine fuel, thereby increasing the efficiency of cargo loading and vessel operation.
이상에서는 특정의 실시 예에 대하여 도시하고 설명하였다. 그러나, 본 발명은 상기한 실시 예에만 한정되지 않으며, 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이하의 청구범위에 기재된 발명의 기술적 사상의 요지를 벗어남이 없이 얼마든지 다양하게 변경 실시할 수 있을 것이다.In the above, specific embodiments have been illustrated and described. However, the present invention is not limited only to the above-described embodiments, and those skilled in the art to which the present invention pertains can variously change variously without departing from the gist of the technical idea of the invention described in the claims below. Could be.

Claims (7)

  1. 제1액화가스와 상기 제1액화가스의 증발가스를 저장하는 저장탱크; A storage tank for storing a first liquefied gas and an evaporated gas of the first liquefied gas;
    제2액화가스와 상기 제2액화가스의 증발가스를 저장하는 예비탱크;A preliminary tank storing a second liquefied gas and an evaporated gas of the second liquefied gas;
    상기 저장탱크에 불활성 가스를 주입하여 이너팅(inerting)을 수행하는 불활성 가스장치; 및An inert gas device for inerting the inert gas into the storage tank; And
    상기 예비탱크로부터 공급받은 제2액화가스를 상기 저장탱크 내벽에 분사하여 쿨링시키는 쿨링장치;를 포함하는 선박.And a cooling device that cools by spraying the second liquefied gas supplied from the preliminary tank on an inner wall of the storage tank.
  2. 제1항에 있어서,The method of claim 1,
    상기 예비탱크는 압력식 탱크이고,The preliminary tank is a pressure tank,
    상기 예비탱크는 데크 상에 설치되는 선박.The preliminary tank is installed on the deck.
  3. 제1항에 있어서,The method of claim 1,
    상기 제1액화가스는 액화에탄이고, The first liquefied gas is liquefied ethane,
    상기 제2액화가스는 액화에틸렌, 액화석유가스, 액화프로판, 및 액화부탄 중 어느 하나를 포함하는 선박.The second liquefied gas is a vessel comprising any one of liquefied ethylene, liquefied petroleum gas, liquefied propane, and liquefied butane.
  4. 제1항에 있어서,The method of claim 1,
    상기 제1액화가스와 상기 제2액화가스는 종류가 상이한 선박.The first liquefied gas and the second liquefied gas are different types of vessels.
  5. 제1저장탱크의 제1액화가스와 상기 제1액화가스 증발가스 및 제2저장탱크의 제1액화가스 증발가스를 엔진으로 공급하는 단계;Supplying a first liquefied gas of a first storage tank, the first liquefied gas boiled gas and a first liquefied gas boiled gas of a second storage tank to an engine;
    상기 제1저장탱크의 제1액화가스가 소진되면, 상기 제1저장탱크에 불활성 가스를 주입하여 이너팅(inerting)을 수행하고, 상기 제2저장탱크의 제1액화가스를 상기 엔진으로 공급하는 단계; 및When the first liquefied gas of the first storage tank is exhausted, inerting is performed by injecting an inert gas into the first storage tank and supplying the first liquefied gas of the second storage tank to the engine. step; And
    상기 이너팅을 수행한 이후, 예비탱크로부터 공급받은 제2액화가스를 상기 제1저장탱크 내벽에 분사하여 상기 제1저장탱크를 쿨링시키는 단계;를 포함하는 연료가스 공급방법.And cooling the first storage tank by injecting a second liquefied gas supplied from a preliminary tank onto an inner wall of the first storage tank after performing the inner heating.
  6. 제5항에 있어서,The method of claim 5,
    상기 제1저장탱크에 존재하는 불활성 가스 및 상기 분사된 제2액화가스의 증발가스를 소각하는 단계를 더 포함하는 연료가스 공급방법. And incinerating the inert gas existing in the first storage tank and the boil-off gas of the injected second liquefied gas.
  7. 제5항에 있어서,The method of claim 5,
    상기 예비탱크에 저장된 제2액화가스는 상기 제1저장탱크에 선적될 액화가스와 동일한 종류인 연료가스 공급방법.The second liquefied gas stored in the preliminary tank is the same kind of liquefied gas to be shipped to the first storage tank.
PCT/KR2015/014505 2015-01-13 2015-12-30 Ship, and method for supplying fuel gas WO2016114515A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020532688A (en) * 2017-09-01 2020-11-12 サムスン・ヘヴィー・インダストリーズ・カンパニー・リミテッド Pressurized liquid cargo transfer device and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100110500A (en) * 2009-04-03 2010-10-13 대우조선해양 주식회사 Replacement method of a liquefied gas storage tank using nitrogen
KR20120107885A (en) * 2011-03-22 2012-10-04 대우조선해양 주식회사 System and method for supplying fuel for a marine structure having a reliquefaction apparatus and a high pressure natural gas injection engine
KR101438323B1 (en) * 2013-06-12 2014-09-04 현대중공업 주식회사 A treatment System of Liquefied Gas and A Method for the same
KR20140138017A (en) * 2013-05-23 2014-12-03 대우조선해양 주식회사 Hybrid fuel supply system and method for a ship engine
KR20140143023A (en) * 2013-06-05 2014-12-15 현대중공업 주식회사 A Treatment System of Liquefied Natural Gas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100110500A (en) * 2009-04-03 2010-10-13 대우조선해양 주식회사 Replacement method of a liquefied gas storage tank using nitrogen
KR20120107885A (en) * 2011-03-22 2012-10-04 대우조선해양 주식회사 System and method for supplying fuel for a marine structure having a reliquefaction apparatus and a high pressure natural gas injection engine
KR20140138017A (en) * 2013-05-23 2014-12-03 대우조선해양 주식회사 Hybrid fuel supply system and method for a ship engine
KR20140143023A (en) * 2013-06-05 2014-12-15 현대중공업 주식회사 A Treatment System of Liquefied Natural Gas
KR101438323B1 (en) * 2013-06-12 2014-09-04 현대중공업 주식회사 A treatment System of Liquefied Gas and A Method for the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020532688A (en) * 2017-09-01 2020-11-12 サムスン・ヘヴィー・インダストリーズ・カンパニー・リミテッド Pressurized liquid cargo transfer device and method
JP7220706B2 (en) 2017-09-01 2023-02-10 サムスン・ヘヴィー・インダストリーズ・カンパニー・リミテッド Apparatus and method for transferring pressurized liquid cargo

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