WO2022102120A1 - 管路システム、排出方法、制御装置 - Google Patents
管路システム、排出方法、制御装置 Download PDFInfo
- Publication number
- WO2022102120A1 WO2022102120A1 PCT/JP2020/042583 JP2020042583W WO2022102120A1 WO 2022102120 A1 WO2022102120 A1 WO 2022102120A1 JP 2020042583 W JP2020042583 W JP 2020042583W WO 2022102120 A1 WO2022102120 A1 WO 2022102120A1
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- WIPO (PCT)
- Prior art keywords
- fuel
- valve
- gas
- drum
- limit value
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 93
- 239000000446 fuel Substances 0.000 claims abstract description 453
- 238000010438 heat treatment Methods 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims description 78
- 238000005086 pumping Methods 0.000 claims description 53
- 238000007599 discharging Methods 0.000 claims description 29
- 230000004044 response Effects 0.000 claims description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 6
- 239000010962 carbon steel Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 380
- 239000000295 fuel oil Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 3
- 239000003915 liquefied petroleum gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- 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
- B63J2/02—Ventilation; Air-conditioning
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0613—Switch-over from one fuel to another
- F02D19/0621—Purging of the fuel system
-
- 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
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
-
- 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
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
-
- 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
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0293—Safety devices; Fail-safe measures
-
- 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
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
- F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J99/00—Subject matter not provided for in other groups of this subclass
- B63J2099/001—Burning of transported goods, e.g. fuel, boil-off or refuse
- B63J2099/003—Burning of transported goods, e.g. fuel, boil-off or refuse of cargo oil or fuel, or of boil-off gases, e.g. for propulsive purposes
-
- 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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0332—Safety valves or pressure relief valves
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/035—Propane butane, e.g. LPG, GPL
-
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
-
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
-
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. for liquefied gas
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
-
- 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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/042—Reducing risk of explosion
-
- 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
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/031—Treating the boil-off by discharge
-
- 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
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/032—Treating the boil-off by recovery
-
- 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
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/06—Fluid distribution
- F17C2265/066—Fluid distribution for feeding engines for propulsion
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- 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
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
-
- 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
-
- 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
- Y02T70/00—Maritime or waterways transport
- Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
Definitions
- the present invention relates to a pipeline system provided in a ship that discharges bent gas vaporized by liquefied gas fuel from a vent post, a method of discharging bent gas using the pipeline system, and a control system that controls a valve provided in the pipeline system. Regarding.
- liquefied gas fuel a ship that drives an engine using a fuel such as LPG that has liquefied gas (hereinafter referred to as liquefied gas fuel) has been used.
- the vent gas obtained by vaporizing the residual liquefied gas fuel that has not been used in the engine is discharged from the vent post erected in the vertical direction.
- this type of ship includes a tank 4 for liquefied gas fuel, a fuel supply system 6 for supplying the liquefied gas fuel L from the tank 4 to the engine 5, a tank for fuel oil, and the like (not shown). Is omitted), and a fuel oil system (not shown) for supplying fuel oil from the tank to the engine 5 is provided.
- the pipeline system 100 includes a drum 101, a fuel pipeline 102, fuel pipeline valves 103A and 103B, a heating means 104, and a gas pipeline 105.
- the liquefied gas fuel L existing in the fuel supply system 6 is guided to the inside of the drum 101 via the fuel pipeline 102 in a state where the fuel pipeline valve 103A is open. Further, with the fuel pipeline valve 103B open, the liquefied gas fuel L existing in the engine 5 is guided to the inside of the drum 101 via the fuel pipeline 102.
- the heating means 104 heats and vaporizes the liquefied gas fuel L existing inside the drum 101, and the vent gas G vaporized by the liquefied gas fuel L in the drum 101 is vented through the gas pipeline 105. Guided by 3, the gas is discharged from the discharge port 3a of the vent post 3 (FIGS. 10 and 11).
- the inside of the drum 101 is always open to the atmosphere via the gas pipeline 105 and the vent post 3.
- the pressure inside the drum 101 is always about the atmospheric pressure, so that the bent gas G vaporized in the drum 101 has a low temperature and a low pressure, and the kinetic energy is small. Therefore, the flow velocity of the vent gas G discharged from the discharge port 3a of the vent post 3 becomes slow. Therefore, as shown in FIG. 11, a phenomenon occurs in which the vent gas G discharged from the discharge port 3a drops around the vent post 3, and as a result, the space around the vent post 3 becomes an explosive atmosphere. There is a risk.
- the present invention has been made in view of the above matters, and an object thereof is to be able to discharge the vent gas from the discharge port of the vent post at a high speed, so that the vent gas is diffused far away from the vent post and descends around the bent post. It is an object of the present invention to provide a pipeline system capable of suppressing the amount of bent gas to be reduced, a method of discharging bent gas using the pipeline system, and a control system for controlling a valve provided in the pipeline system.
- the present invention includes the subjects described in the following sections.
- Item 1 A pipeline system installed on a ship that discharges vent gas vaporized from liquefied gas fuel from a vent post. With a drum with a walled interior, A fuel pipeline for guiding the liquefied gas fuel to the inside of the drum, A fuel pipeline valve that opens and closes the fuel pipeline, A heating means for generating the bent gas by heating the liquefied gas fuel guided to the inside of the drum, and a heating means. A gas pipeline for guiding the vent gas existing inside the drum to the vent post, and A pipeline system including a gas pipeline valve that opens and closes the gas pipeline.
- the ship supplies the liquefied gas fuel present in the fuel supply system to the engine.
- the fuel pipeline is for guiding the liquefied gas fuel existing in the fuel supply system to the inside of the drum and the liquefied gas fuel existing in the engine to the inside of the drum.
- Item 3. The pipeline system according to Item 1 or 2, wherein the wall of the drum is formed of carbon steel.
- Item 4. A method of discharging bent gas using the pipeline system according to any one of Items 1 to 3. Pumping process and It has a heating and discharging step executed after the pumping step.
- the pumping step the fuel pipeline valve and the gas pipeline valve are opened, and the liquefied gas fuel is pumped into the inside of the drum via the fuel pipeline.
- the heating discharge step With the fuel pipeline valve and the gas pipeline valve closed, the liquefied gas fuel existing inside the drum is heated by the heating means until the pressure inside the drum rises to an upper limit value equal to or higher than the atmospheric pressure.
- the heating process to generate bent gas by heating with By opening the gas pipeline valve when the pressure inside the drum reaches the upper limit value, and closing the gas pipeline valve when the pressure inside the drum drops to a lower limit value equal to or higher than the atmospheric pressure. Until the air pressure inside the drum drops from the upper limit value to the lower limit value, the vent gas existing inside the drum is guided to the vent post and discharged from the vent post. Discharge method.
- Item 5 The pumping step is performed until the position of the liquid level of the liquefied gas fuel stored inside the drum becomes higher than the first position.
- Item 4. The method for discharging bent gas according to Item 4, wherein the heating and discharging step is performed until the position of the liquid level of the liquefied gas fuel stored inside the drum drops to the first position.
- Item 6 The pumping step is performed until the position of the liquid level of the liquefied gas fuel stored inside the drum becomes the second position.
- the heating and discharging step is performed until the position of the liquid level of the liquefied gas fuel stored inside the drum drops from the second position to the third position.
- Item 4. The method for discharging bent gas according to Item 4, wherein when the position of the liquid level of the liquefied gas fuel stored inside the drum reaches the third position, the process shifts to the pumping step.
- a control device for controlling a gas pipeline valve provided in the pipeline system according to any one of Items 1 to 3.
- the pipeline system is provided with a pressure sensor that measures the air pressure inside the drum.
- the control device includes an upper limit value determining means, a lower limit value determining means, and a valve controlling means as means for controlling the gas pipeline valve in a state where the fuel pipeline valve is closed.
- the upper limit value determining means determines whether or not the measured value of the pressure sensor has reached the upper limit value of atmospheric pressure or higher with the gas pipeline valve closed. When it is determined by the upper limit value determining means that the measured value of the pressure sensor has reached the upper limit value in a state where the gas pipeline valve is closed, the valve control means opens the gas pipeline valve.
- the lower limit value determining means determines whether or not the measured value of the pressure sensor has dropped to the lower limit value of atmospheric pressure or higher with the gas pipeline valve open. When it is determined by the lower limit value determining means that the measured value of the pressure sensor has dropped to the lower limit value while the gas pipeline valve is open, the valve control means closes the gas pipeline valve. In the state of A control device that returns to the determination by the upper limit value determining means after the gas pipeline valve is closed by the valve controlling means.
- a control device for controlling a fuel pipeline valve and a gas pipeline valve provided in the pipeline system according to Item 2.
- the pipeline system is provided with a pressure sensor that measures the air pressure inside the drum and a fuel sensor that measures the position of the liquid level of the liquefied gas fuel stored inside the drum.
- the control device includes an end signal reception time determination unit, a first position determination unit, an upper limit value determination unit, a lower limit value determination unit, and a valve control unit.
- the valve control means keeps the fuel line valve and the gas line valve open.
- the end signal reception time determination means stores the fuel inside the drum based on the measured value of the fuel sensor. It is determined whether or not the position of the liquid level of the liquefied gas fuel is lower than the first position.
- the valve control means is the fuel pipeline valve and the fuel pipeline valve. With the gas pipeline valve closed, Based on the measured value of the fuel sensor, the first position determining means is the position of the liquid level of the liquefied gas fuel stored inside the drum with the fuel pipeline valve and the gas pipeline valve closed.
- the upper limit value determining means closes the gas pipeline valve. In this state, it is determined whether or not the measured value of the pressure sensor has reached the upper limit value of the atmospheric pressure or higher.
- the valve control means opens the gas pipeline valve.
- the lower limit value determining means opens the gas pipeline valve. In this state, it is determined whether or not the measured value of the pressure sensor has dropped to the lower limit value above the atmospheric pressure. When it is determined by the lower limit value determining means that the measured value of the pressure sensor has dropped to the lower limit value while the gas pipeline valve is open, the valve control means closes the gas pipeline valve. In the state of After the gas pipeline valve is opened by the valve control means, or when it is determined by the lower limit value determination means that the measured value of the pressure sensor has dropped to the lower limit value, or the valve control means.
- the valve controlling means closes the gas pipeline valve. A control device that is in a closed state.
- a control device for controlling a fuel pipeline valve and a gas pipeline valve provided in the pipeline system according to any one of Items 1 to 3.
- the pipeline system is provided with a pressure sensor that measures the air pressure inside the drum and a fuel sensor that measures the amount of the liquefied gas fuel stored inside the drum.
- the control device includes a second position determination means, a third position determination means, an upper limit value determination means, a lower limit value determination means, and a valve control means. In the second position determining means, whether or not the position of the liquid level of the liquefied gas fuel stored inside the drum reaches the second position with the fuel pipeline valve and the gas pipeline valve open.
- the valve control means means the fuel pipeline valve and the gas. With the pipeline valve closed, The third position determining means determines whether or not the position of the liquid level of the liquefied gas fuel stored inside the drum has dropped to the third position with the fuel pipeline valve closed. When it is not determined by the third position determining means that the position of the liquid level of the liquefied gas fuel stored inside the drum has dropped to the third position, the upper limit value determining means has closed the gas pipeline valve. In the state, it is determined whether or not the measured value of the pressure sensor has reached the upper limit value of the atmospheric pressure or higher.
- the valve control means opens the gas pipeline valve.
- the lower limit value determining means opens the gas pipeline valve. In this state, it is determined whether or not the measured value of the pressure sensor has dropped to the lower limit value above the atmospheric pressure.
- the valve control means closes the gas pipeline valve.
- the valve controlling means opens the gas pipeline valve. A control device that is in a state and then returns to the determination by the second position determination means.
- the vent gas can be discharged at high speed from the discharge port of the vent post, the vent gas can be diffused far away from the vent post, and the amount of the vent gas falling around the bent post can be suppressed to a small amount.
- FIG. 1 is a schematic view showing a pipeline system 1 according to an embodiment of the present invention.
- FIG. 2 is a perspective view showing a ship 2 provided with a pipeline system 1.
- the pipeline system 1 (FIG. 1) according to the embodiment of the present invention is provided on the ship 2 (FIG. 2) in which the vent gas G vaporized by the liquefied gas fuel L is discharged from the vent post 3.
- the liquefied gas fuel L means a fuel obtained by liquefying a gas
- the liquefied gas fuel L includes LPG (liquefied petroleum gas), LNG (liquefied natural gas), and LAG (liquefied ammonia gas). ) Etc. are included.
- the ship 2 (FIG. 2) includes a tank 4 (FIG. 1) for storing the liquefied gas fuel L, an engine 5 (FIG. 1) in which the liquefied gas fuel L and the fuel oil can be selectively used, and the tank 4.
- the fuel supply system 6 (FIG. 1) capable of supplying the liquefied gas fuel L to the engine 5, the fuel oil tank for storing the fuel oil (not shown), and the fuel oil from the fuel oil tank are used for the engine 5. It is equipped with a fuel oil system (not shown) that can be supplied to.
- the ship 2 can drive the engine 5 and navigate by supplying the liquefied gas fuel L or the fuel oil to the engine 5.
- the fuel supply system 6 includes a pump and a heat exchanger, and the liquefied gas fuel L existing in the fuel supply system 6 is supplied to the engine 5 by the pump, and the liquefied gas fuel L not used in the engine 5 is supplied. Can be returned to the fuel supply system 6.
- the liquefied gas fuel L existing in the fuel supply system 6 includes the liquefied gas fuel L supplied from the tank 4 and the liquefied gas fuel L returned from the engine 5. Further, the fuel supply system 6 can adjust the temperature of the liquefied gas fuel L supplied to the engine 5 to a predetermined range by the heat exchanger.
- the fuel supply system 6 and the engine 5 are each provided with a gas injection device (not shown) that injects a nonflammable gas such as nitrogen.
- the liquefied gas fuel L existing in the fuel supply system 6 can be pressure-fed to the pipeline system 1 by the pressure of the nonflammable gas injected by the gas injection device of the fuel supply system 6. Further, the liquefied gas fuel L existing in the engine 5 can be pressure-fed to the pipeline system 1 by the pressure of the nonflammable gas injected by the gas injection device of the engine 5.
- vent post 3 is erected vertically on the deck of the ship 2, and a discharge port 3a for discharging the vent gas G is formed at the upper end of the vent post 3.
- the pipeline system 1 vaporizes the residual liquefied gas fuel L existing in the engine 5 and the fuel supply system 6 to the vent post 3. It is used to discharge from the discharge port 3a.
- the pipeline system 1 includes a drum 10 having an inside 10b surrounded by a wall 10a, a fuel pipeline 11 for guiding the liquefied gas fuel L to the interior 10b of the drum 10, and a fuel pipeline.
- the fuel pipeline valve 12 that opens and closes 11, the heating means 13 that heats the liquefied gas fuel L guided to the inside 10b of the drum 10 to generate the vent gas G, and the vent gas G existing in the inside 10b of the drum 10 are vented.
- a gas pipeline 14 for guiding to the post 3 and a gas pipeline valve 15 for opening and closing the gas pipeline 14 are provided.
- the wall 10a of the drum 10 is formed of carbon steel and has excellent pressure resistance.
- the fuel pipeline 11 includes a system fuel pipeline 20 for guiding the liquefied gas fuel L existing in the fuel supply system 6 to the inside 10b of the drum 10, and the liquefied gas fuel L existing in the engine 5 inside the drum 10 10b. It constitutes an engine fuel line 21 for leading to.
- a first fuel pipeline valve 12A for opening and closing the system fuel pipeline 20 and a second fuel pipeline valve 12B for opening and closing the engine fuel pipeline 21 are provided.
- these fuel pipeline valves 12A and 12B valves that can be manually or automatically switched between opening and closing can be used.
- the fuel pipeline 11 includes a first branch pipeline 22 to which one end 22a is connected to the fuel supply system 6, a second branch pipeline 23 to which one end 23a is connected to the engine 5, and the first.
- the other end 22b of the branch line 22 and the other end 23b of the second branch line 23 are connected to one end 24a, and the drum 10 has a main line 24 to which the other end 24b is connected.
- the fuel pipeline 20 for the system is composed of the first branch pipeline 22 and the main pipeline 24.
- the engine fuel pipeline 21 is composed of a second branch pipeline 23 and a main pipeline 24.
- the first fuel pipeline valve 12A opens and closes the first branch pipeline 22, and the second fuel pipeline valve 12B opens and closes the second branch pipeline 23.
- the main pipeline 24 is also used as a part of the fuel pipeline 20 for the system and a part of the fuel pipeline 21 for the engine, but the fuel pipeline 20 for the system and the fuel pipeline 21 for the engine are also used. And may be a separate and independent pipeline.
- a first fuel pipeline valve 12A that manually or automatically opens and closes the system fuel pipeline 20 and a second fuel pipeline valve 12B that manually or automatically opens and closes the engine fuel pipeline 21 are provided. Will be.
- the heating means 13 is, for example, a heat exchanger in which a high-temperature fluid (high-temperature liquid or high-temperature gas) is passed through the cavity of the tube.
- a high-temperature fluid high-temperature liquid or high-temperature gas
- the tube is inserted into the drum 10 by penetrating the tube through the wall 10a of the drum 10.
- the liquefied gas fuel L guided to the inside 10b of the drum 10 is heated by heat exchange with the fluid flowing through the cavity of the tube.
- an appliance provided with a heating element such as a heating wire may be used.
- One end 14a of the gas pipeline 14 is connected to the drum 10, and the other end 14b of the gas pipeline 14 is connected to the vent post 3.
- the gas pipeline valve 15 opens and closes the gas pipeline 14, and as the gas pipeline valve 15, a valve that can be manually or automatically switched between opening and closing can be used.
- the liquefied gas fuel L is fueled by opening one or both of the first and second fuel pipeline valves 12BA and 12B and the gas pipeline valve 15. It can be pumped to the inside 10b of the drum 10 via the pipeline 11.
- the gas injection device of the fuel supply system 6 injects.
- the liquefied gas fuel L existing in the fuel supply system 6 is pumped to the inside 10b of the drum 10 via the system fuel pipeline 20 (first branch pipeline 22 and main pipeline 24) by the pressure of the nonflammable gas. can do.
- the gas injection device of the engine 5 injects. Due to the pressure of the nonflammable gas, the liquefied gas fuel L existing in the engine 5 can be pressure-fed to the inside 10b of the drum 10 through the engine fuel pipeline 21 (second branch pipeline 23 and main pipeline 24). can.
- the gas injection device of the fuel supply system 6 and the gas injection device of the engine 5 inject.
- the liquefied gas fuel L existing in the fuel supply system 6 and the liquefied gas fuel L existing in the engine 5 are pumped to the inside 10b of the drum 10 via the fuel pipeline 11 by the pressure of the nonflammable gas. Can be done.
- the inside 10b of the drum 10 is exposed to the atmosphere. It is possible to prevent communication with the space. Therefore, with the gas pipeline valve 15 and the fuel pipeline valves 12A and 12B closed as described above, the liquefied gas fuel L guided to the inside 10b of the drum 10 is heated by the heating means 13 to generate the vent gas G. Then, the bent gas G existing in the drum 10 can be made high temperature and high pressure to have high internal energy. If the gas pipeline valve 15 is opened with the internal energy of the vent gas G increased in this way, the bent gas G converted into high kinetic energy is guided to the vent post 3 via the gas pipeline 14.
- the vent gas G can be discharged at high speed from the discharge port 3a of the vent post 3.
- the bent gas G can be diffused far away from the vent post 3 and the amount of the bent gas G falling from the discharge port 3a to the periphery of the bent post 3 can be suppressed to a small amount, so that the space around the vent post 3 has an explosive atmosphere. Can be avoided.
- the wall 10a of the drum 10 is formed by using carbon steel having excellent pressure resistance, so that the bent gas G existing in the drum 10 is made high pressure as described above. Also, it is possible to prevent the wall 10a of the drum 10 from being destroyed. Therefore, it is possible to stably continue to discharge the bent gas G from the discharge port 3a at high speed.
- the present invention does not require that the wall 10a of the drum 10 be formed of carbon steel, and the wall 10a of the drum 10 may be formed of a material other than carbon steel.
- the discharge pipeline 25 provided with the discharge pipeline valve 26 and the discharge pipeline provided with the safety valve 28 are provided as pipelines connected to the drum 10. 27 is provided.
- the discharge pipeline 25 is provided to discharge the lubricating oil mixed in the liquefied gas fuel L in the drum 10 and the drainage accumulated in the drum 10 during maintenance of the pipeline system 1.
- the discharge pipe passage valve 26 is in an open state.
- the discharge pipe 27 connects the position downstream of the gas pipe valve 15 in the gas pipe 14 to the drum 10, and the safety valve 28 is provided on the drum 10 side of the discharge pipe 27.
- the safety valve 28 automatically operates to open the inside of the drum 10.
- the vent gas G is guided to the vent post 3 via the discharge pipe 27 and the gas pipe 15, and is discharged from the discharge port 3a. This prevents the drum 10 from being damaged.
- the discharge pipe 25, the discharge pipe valve 26, the discharge pipe 27, and the safety valve 28 are not necessarily used for vaporizing the liquefied gas fuel L existing in the engine 5 or the fuel supply system 6 and discharging the liquefied gas fuel L from the vent post 3. It is not necessary and may be omitted from the pipeline system 1.
- the fuel supply system is in a state where the discharge line valve 26 and the safety valve 28 are closed.
- the liquefied gas fuel L existing in 6 is pumped into the drum 10
- the liquefied gas fuel L existing in the engine 5 is pumped into the drum 10
- the liquefied gas fuel L guided into the drum 10 is heated. Heating is performed by the means 13, or the vent gas G existing in the drum 10 is guided to the vent post 3 and discharged from the discharge port 3a.
- the vent gas G discharge method shown in FIG. 3 includes a pressure feeding step and a heating discharge step executed after the pressure feeding step.
- the fuel pipeline valve 12 and the gas pipeline valve 15 are opened, and the liquefied gas fuel L is pumped to the inside 10b of the drum 10 via the fuel pipeline 11.
- the opening state of the fuel pipeline valve 12 includes opening one or both of the first and second fuel pipeline valves 12A and 12B.
- the first fuel pipeline valve 12A and the gas pipeline valve 15 are open, the liquefied gas fuel L existing in the fuel supply system 6 is pumped to the inside 10b of the drum 10.
- the second fuel pipeline valve 12B and the gas pipeline valve 15 are open, the liquefied gas fuel L existing in the engine 5 is pumped to the inside 10b of the drum 10.
- the first and second fuel pipeline valves 12A and 12B and the gas pipeline valve 15 are open, the liquefied gas fuel L existing in the fuel supply system 6 and the engine 5 is pumped to the inside 10b of the drum 10. Is done.
- the heating discharge step includes a heating step performed until the pressure inside the drum 10 rises to an upper limit value equal to or higher than the atmospheric pressure, and the pressure inside the drum 10 is equal to or higher than the atmospheric pressure from the upper limit value. It includes a discharge step performed before the value drops to the lower limit.
- the liquefied gas fuel L existing in the inside 10b of the drum 10 with the fuel line valve 12 and the gas line valve 15 closed until the air pressure inside the drum 10 rises to the upper limit value. Is heated by the heating means 13 to generate the bent gas G.
- Closing the fuel pipeline valve 12 means closing both the first and second fuel pipeline valves 12A and 12B.
- the gas pipeline valve 15 is opened when the air pressure inside the drum 10 reaches the upper limit, and when the air pressure inside the drum 10 drops to the lower limit, the gas pipeline valve 15 is opened.
- the vent gas G existing in the inner 10b of the drum 10 is guided to the vent post 3 until the air pressure in the inner 10b of the drum 10 drops from the upper limit value to the lower limit value, and the vent post 3 is used. Is discharged from.
- the gas pipeline valve 15 is closed, so that the first and second fuel pipeline valves 12A and 12B and the gas pipeline valve 15 are closed. It is said that the process shifts to the heating process.
- a pressure sensor 30 (FIG. 1) for measuring the air pressure inside the drum 10 is provided in the pipeline system 1, and the drum 10 is based on the measured value of the pressure sensor 30.
- the air pressure inside 10b of the above reaches the upper limit value or drops to the lower limit value, it is specified.
- the gas pipeline valve 15 is in an open state while the pressure inside the drum 10 is in the range of atmospheric pressure or higher (lower limit value to upper limit value), so that the vent post 3 is used.
- the bent gas G can be discharged at high speed from the discharge port 3a of the above. Therefore, the vent gas G can be diffused far away from the vent post 3 to reduce the amount of the vent gas G falling around the vent post 3, so that the space around the vent post 3 becomes an explosive atmosphere. Can be avoided.
- the inside 10b of the drum 10 is used.
- the liquefied gas fuel L present in the above is heated by the heating means 13 to generate the bent gas G.
- the discharge pipe 25, the discharge pipe valve 26, the discharge pipe 27, and the safety valve 28 are provided in the pipe system 1, the pressure feeding process and heating are performed with the discharge pipe valve 26 and the safety valve 28 closed. The discharge process is carried out.
- a control device that controls the gas pipeline valve 15 based on the measured value of the pressure sensor 30 with the fuel pipeline valve 12 closed. 31 (FIG. 4) may be provided on the vessel 2.
- the control device 31 has an upper limit value determination means 32, a lower limit value determination means 33, and a valve control means as means (functional block) for controlling the gas pipeline valve 15 in a state where the fuel pipeline valve 12 is closed. It has 34 (Fig. 4). These means 32, 33, 34 may be realized in terms of hardware, but may also be realized in terms of software by the processor of the control device 31 reading the program into the memory and executing the program.
- control device 31 is assumed to include, for example, a relay circuit, a pressure switch is used as the pressure sensor 30, and the fuel pipeline valve 12 is used. And as the gas pipeline valve 15, an on-off valve provided with a drive source utilizing hydraulic pressure or pneumatic pressure is used.
- the control device 31 is a device including a PLC (Programmable Logic Controller), and a pressure transmitter is used as the pressure sensor 30. ..
- a computer equipped with a CPU, ROM, and RAM is used as the control device 31.
- FIG. 5 is a flow chart of the processing executed by the control device 31.
- the fuel pipeline valve 12 and the gas pipeline valve 15 are closed after the liquefied gas fuel L is pumped to the inside 10b of the drum 10 in the pumping step. Depending on, it will be started.
- the state in which the fuel pipeline valve 12 is closed means a state in which both the first and second fuel pipeline valves 12A and 12B are closed.
- the closed state of the fuel pipeline valve 12 is maintained, and the liquefied gas fuel L existing in the inside 10b of the drum 10 is heated by the operation of the heating means 13. , Vent gas G is generated.
- the upper limit value determining means 32 determines whether or not the measured value of the pressure sensor 30 has reached the upper limit value of atmospheric pressure or higher with the gas pipeline valve 15 closed (S101). While it is not determined that the measured value of the pressure sensor 30 has reached the upper limit value (NO in S101), the gas pipeline valve 15 is maintained in the closed state.
- the valve control means 34 uses the gas pipeline.
- the valve 15 is opened (S102).
- the lower limit value determining means 33 determines whether or not the measured value of the pressure sensor 30 is lower than the upper limit value and has dropped to the lower limit value which is a value equal to or higher than the atmospheric pressure in the state where the gas pipeline valve 15 is open. (S103).
- the lower limit value determining means 33 does not determine that the measured value of the pressure sensor 30 has dropped to the lower limit value (NO in S103) while the gas pipeline valve 15 is open, the gas pipeline valve 15 is open. Is maintained.
- the valve control means 34 uses the gas pipeline.
- the valve 15 is closed (S104).
- the fuel pipeline valve 12 and the gas pipeline valve 15 are closed by determining NO in S101 until the air pressure inside the drum 10 rises to the upper limit value. It is realized to carry out the heating process.
- the fuel pipeline valve 12 is closed and the gas pipeline valve 15 is determined by S103 until the air pressure inside the drum 10 drops from the upper limit value to the lower limit value. It is realized that the discharge process can be continued with the open state.
- the present invention is not limited to the above embodiment and can be variously modified.
- a pumping step is performed until the position (height) of the liquid level of the liquefied gas fuel L stored in the inside 10b of the drum 10 becomes higher than the first position, and the inside 10b of the drum 10 is performed.
- the heating and discharging process is performed until the position (height) of the liquid level of the liquefied gas fuel L stored in is lowered to the first position, and the position of the liquid level of the liquefied gas fuel L stored in the inside 10b of the drum 10 is the first.
- the heating and discharging process may be stopped when the position is reached.
- a fuel sensor 40 for measuring the position (height) of the liquid level of the liquefied gas fuel L stored in the inside 10b of the drum 10 is provided in the management system, and the measured value of the fuel sensor 40 is used. Based on this, the time when the position (height) of the liquid level of the liquefied gas fuel L stored in the inside 10b of the drum 10 becomes the first position is specified.
- the fuel sensor 40 for example, an ultrasonic sensor, a radar sensor, a sound fork sensor, or a float sensor can be used.
- the pressure sensor 30 provided in the pipeline system 1 is provided to automatically open and close the fuel pipeline valve 12 and the gas pipeline valve 15.
- a control device 41 (FIG. 6) that performs processing based on the measured values of the fuel sensor 40 may be provided on the ship 2.
- the control device 41 includes, as means (functional block) for controlling the fuel pipeline valve 12 and the gas pipeline valve 15, the end signal reception position determination means 42, the first position determination means 43, and the first position determination means 43. It has an upper limit value determining means 44, a lower limit value determining means 45, and a valve controlling means 46. These means 42, 43, 44, 45, 46 may be realized by hardware, but may also be realized by software by the processor of the control device 41 reading the program into the memory and executing the program. ..
- control device 41 is assumed to include, for example, a relay circuit, a pressure switch is used as the pressure sensor 30, and fuel is used.
- a pressure switch is used as the pressure sensor 30, and fuel is used.
- an on-off valve provided with a drive source using hydraulic pressure or pneumatic pressure is used.
- control device 41 is a device including a PLC (Programmable Logic Controller), and the pressure sensor 30 is a pressure transmitter. Is used.
- a computer equipped with a CPU, ROM, and RAM is used as the control device 41.
- FIG. 7 is a flow chart of the processing executed by the control device 41.
- the process shown in FIG. 7 is executed on condition that the signals shown in the following a and b are transmitted, or the signals shown in the following c and d are transmitted.
- the time during which the signals shown in a and b below are transmitted and the time during which the signals shown in c and d below are transmitted are set to different times.
- a When starting to pump the liquefied gas fuel L existing in the engine 5 to the inside 10b of the drum 10, the engine 5 transmits a fuel pumping start signal to the control device 41.
- b When the pumping of the liquefied gas fuel L existing in the engine 5 to the inside 10b of the drum 10 is finished, the fuel pumping end signal is transmitted from the engine 5 to the control device 41.
- c When starting to pump the liquefied gas fuel L existing in the fuel supply system 6 to the inside 10b of the drum 10, the fuel supply system 6 transmits a fuel pumping start signal to the control device 41.
- d When the pumping of the liquefied gas fuel L existing in the fuel supply system 6 to the inside 10b of the drum 10 is finished, the fuel feeding end signal is transmitted from the fuel supply system 6 to the control device 41.
- the valve control means 46 keeps the fuel pipeline valve 12 and the gas pipeline valve 15 open.
- Opening the fuel pipeline valve 12 in S201 means opening one of the first and second fuel pipeline valves 12A and 12B, and the S201 is executed. This makes it possible to start the pumping process of pumping the liquefied gas fuel L existing in one of the engine 5 and the fuel supply system 6 to the inside 10b of the drum 10.
- the position determining means 42 at the time of receiving the end signal receives the fuel sensor 40, and the internal 10b of the drum is based on the measured value. It is determined whether or not the position of the liquid level of the liquefied gas fuel L stored in the fuel L is lower than the first position (S202).
- the position of the liquid level of the liquefied gas fuel L stored in the inside 10b of the drum is appropriately described as “the position of the liquid level of the liquefied gas fuel L in the drum 10".
- the valve control means 46 sets the fuel pipeline valve 12 and the gas pipeline valve 15. It is in the closed state (S204). Closing the fuel pipeline valve 12 in S204 means closing one of the first and second fuel pipeline valves 12A and 12B opened in S201. ..
- the valve control means 46 is the first fuel pipeline in S201.
- the valve 12A and the gas pipeline valve 15 are opened, and the first fuel pipeline valve 12A and the gas pipeline valve 15 are closed in S204.
- the valve control means 46 uses the second fuel pipeline valve 12B and 12B in S201.
- the gas pipeline valve 15 is opened, and the second fuel pipeline valve 12B and the gas pipeline valve 15 are closed in S204.
- the fuel pumping end signal is defined by the position of the liquid level of the liquefied gas fuel L existing in one of the engine 5 and the fuel supply system 6 (hereinafter, the liquid level position of the liquefied gas fuel L on the engine 5 side). When it is lowered to the position, it is transmitted from either the engine 5 or the fuel supply system 6 to the control device 41.
- the above-mentioned predetermined position is determined from experience, and the determination of S202 is "when the liquid level position of the liquefied gas fuel L on the engine 5 side drops to the above-mentioned predetermined position, the liquefied gas fuel L in the drum 10 It is done based on the idea that the liquid level position of the above should be higher than the first position.
- the position determining means 42 at the time of receiving the end signal receives the liquefied gas in the drum 10.
- An error signal indicating that the liquid level position of the fuel L is lower than the first position is output (S205), and the valve control means 26 closes the fuel pipeline valve 12 and the gas pipeline valve 15 (S206). ), The process shown in FIG. 7 is completed. In this case, by outputting an error signal, the user is notified that the liquid level position of the liquefied gas fuel L in the drum 10 is lower than the first position, and the user resets, for example, the above-mentioned predetermined position.
- closing the fuel pipeline valve 12 in S206 means closing one of the first and second fuel pipeline valves 12A and 12B opened in S201. means.
- the first position determination means 43 moves the liquid level position of the liquefied gas fuel L in the drum 10 from the first position based on the measured value of the fuel sensor 40. Is also low (S207).
- the upper limit value determining means 44 closes the gas pipeline valve 15. In this state, it is determined whether or not the measured value of the pressure sensor 30 has reached the upper limit value of the atmospheric pressure or higher (S208).
- the valve control means 46 uses the gas pipeline.
- the valve 15 is opened (S209).
- the lower limit value determining means 45 is the gas pipeline. With the valve 15 open, it is determined whether or not the measured value of the pressure sensor 30 is lower than the upper limit value and drops to the lower limit value which is a value equal to or higher than the atmospheric pressure (S210).
- the lower limit value determining means 45 sets the opening / closing of the gas pipeline valve 15 as a determination condition, and the measured value of the pressure sensor 30 (the air pressure inside the drum 10) with the gas pipeline valve 15 closed. Is determined by distinguishing between when the pressure rises to the lower limit and when the measured value of the pressure sensor 30 (the air pressure inside the drum 10) drops to the lower limit when the gas pipeline valve 15 is open. .. That is, when the measured value of the pressure sensor 30 rises to the lower limit value (when the value lower than the lower limit value reaches the lower limit value), the lower limit value determining means 45 means that the gas pipeline valve 15 is not open. It is determined as NO in S210. Further, when the measured value of the pressure sensor 30 drops to the lower limit value (when the value higher than the lower limit value reaches the lower limit value), the lower limit value determining means 45 is S210 because the gas pipeline valve 15 is open. Judges YES.
- the valve control means 45 uses the gas pipeline valve 45.
- the valve 15 is closed (S211).
- the valve control means 46 uses the gas pipeline valve 15. In the closed state (S212), the process of FIG. 7 ends.
- the pumping step is executed with the fuel pipeline valve 12 and the gas pipeline valve 15 open from the execution of S201 to the execution of S204. ..
- Process for carrying out the heating step 1 S207 is determined with the valves 12 and 15 closed, NO in S207 ⁇ NO in S208 ⁇ NO in S210.
- Process for starting the discharge process 2 The determination of S207 is performed with the valves 12 and 15 closed, and NO ⁇ S208 in S207 ⁇ YES ⁇ S209.
- Process for continuing the discharge process 3 The determination of S207 is performed with the valve 12 closed and the valve 15 open, NO in S207 ⁇ NO in S208 ⁇ NO in S210.
- Process for ending the discharge process 4 The determination of S207 is performed with the valve 12 closed and the valve 15 open, NO in S207 ⁇ NO in S208 ⁇ YES ⁇ S211 in S210.
- Process 1 (valves 12 and 15) until the liquid level position of the liquefied gas fuel L in the drum 10 drops to the first position and until the air pressure inside the drum 10 reaches the upper limit value.
- the determination of S207 is performed in the closed state, and NO ⁇ NO in S208 ⁇ NO in S210) is repeated in S207 to close the fuel pipeline valve 12 and the gas pipeline valve 15 to carry out the heating step. Is realized.
- Process 2 (valves 12 and 15 were closed) until the liquid level position of the liquefied gas fuel L in the drum 10 dropped to the first position and when the air pressure inside the drum 10 reached the upper limit.
- the determination of S207 is made in the state, and NO ⁇ YES ⁇ S209) is executed in S207, so that the gas pipeline valve 15 is opened with the fuel pipeline valve 12 closed, and the discharge process is performed. It is realized to start.
- Process 3 (valve) until the liquid level position of the liquefied gas fuel L in the drum 10 drops to the first position and until the air pressure inside the drum 10 drops from the upper limit value to the lower limit value.
- the determination of S207 is performed with the 12 closed and the valve 15 open, and NO ⁇ S208 in S207 ⁇ NO ⁇ NO in S210) is repeated, so that the fuel pipeline valve 12 is closed and the gas pipeline valve 15 is closed. It is realized that the discharge process can be continued with the gas open.
- process shown in FIG. 7 may be executed on condition that the signals shown in the following e and f are transmitted.
- e When starting to pump the liquefied gas fuel L existing in both the engine 5 and the fuel supply system 6 to the inside 10b of the drum 10, a fuel pumping start signal is simultaneously sent from both the engine 5 and the fuel supply system 6. It is transmitted to the control device 41.
- f When terminating the pumping of the liquefied gas fuel L existing in both the engine 5 and the fuel supply system 6 to the inside 10b of the drum 10, the fuel pumping end signal is simultaneously sent from both the engine 5 and the fuel supply system 6. It is transmitted to the control device 41.
- the valve control means responds to the fuel pumping start signal received from both the engine 5 and the fuel supply system 6 to the control device 41.
- the first and second fuel line valves 12A and 12B and the gas line valve 15 are in an open state (S201).
- the position determining means 42 at the time of receiving the end signal receives fuel.
- the valve control means 46 closes the first and second fuel line valves 12A and 12B and the gas line valve 15 (S204). If YES is determined in S202, the position determination means 42 at the time of receiving the end signal outputs an error signal indicating that the liquid level position of the liquefied gas fuel L in the drum 10 is lower than the first position (S205). ), The valve control means 26 closes the first and second fuel pipeline valves 12A and 12B and the gas pipeline valve 15 (S206). S207 to S212 are the same processes as those described above.
- a pumping step is performed until the position (height) of the liquid level of the liquefied gas fuel L stored in the inside 10b of the drum 10 becomes the second position, and the pumping step is performed to the inside 10b of the drum 10.
- the heating and discharging process is performed until the position (height) of the liquid level of the liquefied gas fuel L to be stored drops from the second position to the third position, and the position of the liquid level of the liquefied gas fuel L stored in the inside 10b of the drum 10 is performed.
- the heating and discharging process may be stopped and the process may be shifted to the pumping process.
- a fuel sensor 40 for measuring the position of the liquid level of the liquefied gas fuel L stored in the inside 10b of the drum 10 is provided in the pipeline system 1, and based on the measured value of the fuel sensor 40, the fuel sensor 40 is provided. It is specified when the amount of the liquefied gas fuel L stored in the inside 10b of the drum 10 reaches the second position or the third position.
- the pressure sensor 30 provided in the pipeline system 1 is provided to automatically open and close the fuel pipeline valve 12 and the gas pipeline valve 15.
- a control device 51 (FIG. 8) that performs processing based on the measured values of the fuel sensor 40 may be provided on the ship 2.
- the control device 51 includes a second position determining means 52, a third position determining means 53, and an upper limit value determining means 54 as means (functional blocks) for controlling the fuel pipeline valve 12 and the gas pipeline valve 15. It has a lower limit value determining means 55 and a valve controlling means 56 (FIG. 8).
- These means 52, 53, 54, 55, 56 may be realized by hardware, but may also be realized by software by the processor of the control device 51 reading the program into the memory and executing the program. ..
- control device 51 is assumed to include, for example, a relay circuit, a pressure switch is used as the pressure sensor 30, and fuel is used.
- a pressure switch is used as the pressure sensor 30, and fuel is used.
- an on-off valve provided with a drive source using hydraulic pressure or pneumatic pressure is used.
- control device 51 is a device including a PLC (Programmable Logic Controller), and the pressure sensor 30 is a pressure transmitter. Is used.
- a computer equipped with a CPU, ROM, and RAM is used as the control device 51.
- FIG. 9 is a flow chart of the processing executed by the control device 51.
- Opening the fuel pipeline valve 12 means opening one or both of the first and second fuel pipeline valves 12A and 12B.
- the position of the liquid level of the liquefied gas fuel L stored in the inside 10b of the drum 10 has reached the second position with the fuel pipeline valve 12 and the gas pipeline valve 15 open. Whether or not it is determined (S301). This process is performed based on the measured value of the fuel sensor 40. While it is not determined that the liquid level position of the liquefied gas fuel L in the drum 10 has reached the second position (NO in S301), the fuel pipeline valve 12 and the gas pipeline valve 15 are maintained in an open state.
- the valve control means 56 is the fuel pipeline valve 12 and The gas pipeline valve 15 is closed (S302).
- Closing the fuel pipeline valve 12 in S302 means closing one or both of the first and second fuel pipeline valves 12A and 12B that were in the open state before S302. Meaning (when one of the first and second fuel pipeline valves 12A and 12B is closed before S302, one of the first and second fuel pipeline valves 12A and 12B remains closed. Will be).
- the third position determining means 53 determines whether or not the liquid level position of the liquefied gas fuel L in the drum 10 has dropped to the third position with the fuel pipeline valve 12 closed (S303). This process is also performed based on the measured value of the fuel sensor 40.
- the upper limit value determining means 54 closes the gas pipeline valve 15. In this state, it is determined whether or not the measured value of the pressure sensor 30 has reached the upper limit value of the atmospheric pressure or higher (S304).
- the valve control means 56 uses the gas pipeline valve 56.
- the valve 15 is opened (S305).
- the lower limit value determining means 54 uses the gas pipeline. With the valve 15 open, it is determined whether or not the measured value of the pressure sensor 30 is lower than the upper limit value and drops to the lower limit value which is a value equal to or higher than the atmospheric pressure (S306).
- the lower limit value determining means 55 sets the opening / closing of the gas pipeline valve 15 as a determination condition, and the measured value of the pressure sensor 30 (the air pressure inside the drum 10) with the gas pipeline valve 15 closed. Is determined by distinguishing between when the pressure rises to the lower limit and when the measured value of the pressure sensor 30 (the air pressure inside the drum 10) drops to the lower limit when the gas pipeline valve 15 is open. .. That is, when the measured value of the pressure sensor 30 rises to the lower limit value (when the value lower than the lower limit value reaches the lower limit value), the lower limit value determining means 55 means that the gas pipeline valve 15 is not open. Determined as NO. Further, when the measured value of the pressure sensor 30 drops to the lower limit value (when the value higher than the lower limit value reaches the lower limit value), the lower limit value determining means 55 is set to YES because the gas pipeline valve 15 is open. Is determined.
- the valve control means 56 determines that the gas pipeline valve 15 has dropped to the lower limit value.
- the valve 15 is closed (S307).
- the valve control means 56 uses the fuel pipeline valve 12 and The gas pipeline valve 15 is opened (S308). After that, the determination by the second position determination means 52 of S301 is restored.
- the fuel pipeline valve 12 and the gas pipeline are determined to be NO by S301 until the liquid level position of the liquefied gas fuel L in the drum 10 reaches the second position. It is realized that the pumping step is executed with the valve 15 open.
- any of the following processes 1, 2, 3 and 4 is performed until the liquid level position of the liquefied gas fuel L in the drum 10 drops from the second position to the third position. After that, it is performed to return to S303.
- Process for carrying out the heating step 1 The determination of S303 is made with the valves 12 and 15 closed, and NO in S303 ⁇ NO in S304 ⁇ NO in S306.
- Process for starting the discharge process 2 The determination of S303 is performed with the valves 12 and 15 closed, and NO ⁇ S304 in S303 and YES ⁇ S305.
- Process for continuing the discharge process 3 The determination of S303 is performed with the valve 12 closed and the valve 15 open, NO in S303 ⁇ NO in S304 ⁇ NO in S306.
- Process for ending the discharge process 4 The determination of S303 is performed with the valve 12 closed and the valve 15 open, and NO ⁇ S304 in S303 ⁇ YES ⁇ S307 in S306.
- Process 1 (valve) until the liquid level position of the liquefied gas fuel L in the drum 10 drops from the second position to the third position and until the air pressure inside the drum 10 reaches the upper limit.
- the determination of S303 is performed with the 12 and 15 closed, and NO ⁇ NO in S304 ⁇ NO in S306) is repeated, so that the fuel pipeline valve 12 and the gas pipeline valve 15 are closed and the heating step is performed. Is realized.
- Process 2 (valve 12, The determination of S303 is performed with the 15 closed, and NO ⁇ YES ⁇ S305) is executed in S303, so that the gas pipeline valve 15 is opened with the fuel pipeline valve 12 closed. , It is realized to start the discharge process.
- Process 3 (the determination of S303 is performed with the valve 12 closed and the valve 15 open, NO in S303 ⁇ NO in S304 ⁇ NO in S306) is repeated to close the fuel pipeline valve 12 and gas. It is realized that the discharge process is continued with the pipeline valve 15 open.
- valve 12 The determination of S303 is performed with the valve 15 closed and the valve 15 is open, and NO ⁇ S304 NO ⁇ S306 YES ⁇ S307) is executed to open the fuel pipeline valve 12 and the gas pipeline valve 15. It is realized that the discharge process is completed in the closed state.
- one engine 5 is provided on the ship 2, but two or more engines 5 may be provided on the ship 2.
- one fuel supply system 6 may be provided for each engine 5, or one fuel supply system 6 may be provided for a plurality of engines 5. Even in the above case, if the liquefied gas fuel L existing in each engine 5 and each fuel supply system 6 is guided to the inside 10b of the drum 10 via the fuel pipeline, each engine 5 and each fuel supply system 6 can be guided. The liquefied gas fuel L existing in the fuel L can be vaporized and discharged from the vent post 3 at high speed.
- the liquefied gas fuel L existing in the device or appliance other than the engine 5 and the fuel supply system 6 may be guided to the inside 10b of the drum 10 via the fuel pipeline.
- the liquefied gas fuel L existing in the above-mentioned device or appliance can be vaporized and discharged from the vent post 3 at high speed.
- 1 pipeline system 2 ships, 3 Vent post, 5 engine, 6 Fuel supply system, 10 drums, 10a drum wall, Inside the 10b drum, 11 Fuel pipeline, 12 Fuel pipeline valve, 12A First fuel pipeline valve, 12B Second fuel pipeline valve, 13 Heating means, 14 gas pipeline, 15 Gas pipeline valve, 20 system fuel pipeline, 21 Fuel pipeline for engine, 30 pressure sensor, 40 fuel sensor, 31,41,51 controller, 42 Judgment means at the time of receiving the end signal, 32, 44, 54 Upper limit determination means, 33, 45, 55 Lower limit determination means, 34,46,56 Valve control means, 43 First position determination means, 52 Second position determination means, 53 Third position determination means
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Abstract
Description
壁で包囲された内部を有するドラムと、
前記液化ガス燃料を前記ドラムの内部に導くための燃料管路と、
前記燃料管路を開閉する燃料管路弁と、
前記ドラムの内部に導かれた前記液化ガス燃料を加熱することで前記ベントガスを発生させる加熱手段と、
前記ドラムの内部に存在する前記ベントガスを前記ベントポストに導くためのガス管路と、
前記ガス管路を開閉するガス管路弁と、を備える管路システム。
前記燃料管路は、前記燃料供給システムに存在する前記液化ガス燃料を前記ドラムの内部に導くためのシステム用燃料管路と、前記エンジンに存在する前記液化ガス燃料を前記ドラムの内部に導くためのエンジン用燃料管路とを構成し、
前記燃料管路弁として、前記システム用燃料管路を開閉する第一の燃料管路弁と、前記エンジン用燃料管路を開閉する第二の燃料管路弁とを備える項1に記載の管路システム。
圧送工程と、
前記圧送工程の後に実行される加熱排出工程とを有し、
前記圧送工程では、前記燃料管路弁及び前記ガス管路弁を開いた状態にして、液化ガス燃料を前記燃料管路を介して前記ドラムの内部に圧送することが行われ、
前記加熱排出工程では、
前記燃料管路弁及び前記ガス管路弁が閉じた状態で、前記ドラムの内部の気圧が大気圧以上の上限値に上昇するまでの間、前記ドラムの内部に存在する液化ガス燃料を加熱手段によって加熱してベントガスを発生させる加熱工程と、
前記ドラムの内部の気圧が前記上限値に達した際に前記ガス管路弁を開き、前記ドラムの内部の気圧が大気圧以上の下限値に低下した際に前記ガス管路弁を閉じることで、前記ドラムの内部の気圧が前記上限値から前記下限値に低下するまでの間、前記ドラムの内部に存在するベントガスを、ベントポストに導いてベントポストから排出させる排出工程とが行なわれるベントガスの排出方法。
前記加熱排出工程は、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が、第一位置に低下するまで行なわれる、項4に記載のベントガスの排出方法。
前記加熱排出工程は、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が、前記第二位置から第三位置に低下するまで行なわれ、
前記ドラムの内部に貯留する液化ガス燃料の液面の位置が、前記第三位置になったときに、前記圧送工程に移行する、項4に記載のベントガスの排出方法。
前記管路システムには、前記ドラムの内部の気圧を計測する圧力センサが設けられており、
前記制御装置は、前記燃料管路弁が閉じた状態で、前記ガス管路弁を制御するための手段として、上限値判定手段と、下限値判定手段と、弁制御手段とを有しており、
前記上限値判定手段は、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が、大気圧以上の上限値に達したか否かを判定し、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定された場合、前記弁制御手段は、前記ガス管路弁を開いた状態とし、
前記下限値判定手段は、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が大気圧以上の下限値に低下したか否かを判定し、
前記下限値判定手段によって、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が前記下限値に低下したと判定された場合、前記弁制御手段は、前記ガス管路弁を閉じた状態とし、
前記弁制御手段によって前記ガス管路弁が閉じた状態とされた後、前記上限値判定手段による判定に復帰する制御装置。
前記管路システムには、前記ドラムの内部の気圧を計測する圧力センサと、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置を計測する燃料センサとが設けられており、
前記制御装置は、終了信号受信時判定手段と、第一位置判定手段と、上限値判定手段と、下限値判定手段と、弁制御手段とを有し、
前記エンジン及び前記燃料供給システムの一方から前記制御装置に燃料圧送開始信号が受信されることに応じて、前記弁制御手段は、前記燃料管路弁及び前記ガス管路弁を開いた状態とし、
前記燃料圧送開始信号の発信元から前記制御装置に燃料圧送終了信号が受信されることに応じて、前記終了信号受信時判定手段は、前記燃料センサの計測値に基づき、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が、第一位置よりも低いか否かを判定し、
前記終了信号受信時判定手段によって、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が、第一位置よりも低いと判定されない場合、前記弁制御手段は、前記燃料管路弁及び前記ガス管路弁を閉じた状態とし、
前記第一位置判定手段は、前記燃料センサの計測値に基づき、前記燃料管路弁及び前記ガス管路弁が閉じた状態で、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が第一位置よりも低いか否かを判定し、
前記第一位置判定手段によって、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が第一位置よりも低いと判定されない場合、前記上限値判定手段は、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が大気圧以上の上限値に達したか否かを判定し、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定された場合、前記弁制御手段は、前記ガス管路弁を開いた状態とし、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定されない場合、前記下限値判定手段は、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が大気圧以上の下限値に低下したか否かを判定し、
前記下限値判定手段によって、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が前記下限値に低下したと判定された場合、前記弁制御手段は、前記ガス管路弁を閉じた状態とし、
前記弁制御手段によって前記ガス管路弁が開いた状態とされた後や、前記下限値判定手段によって前記圧力センサの計測値が前記下限値に低下したと判定された場合や、前記弁制御手段によって前記ガス管路弁が閉じた状態とされた後では、前記第一位置判定手段による判定に復帰し、
前記第一位置判定手段によって、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が第一位置よりも低いと判定された場合、前記弁制御手段は、前記ガス管路弁を閉じた状態とする制御装置。
前記管路システムには、前記ドラムの内部の気圧を計測する圧力センサと、前記ドラムの内部に貯留する前記液化ガス燃料の量を計測する燃料センサとが設けられており、
前記制御装置は、第二位置判定手段と、第三位置判定手段と、上限値判定手段と、下限値判定手段と、弁制御手段とを有し、
前記第二位置判定手段は、前記燃料管路弁及び前記ガス管路弁が開いた状態で、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第二位置に達したか否かを判定し、
前記第二位置判定手段によって、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第二位置に達したと判定された場合、前記弁制御手段は、前記燃料管路弁及び前記ガス管路弁を閉じた状態とし、
前記第三位置判定手段は、前記燃料管路弁が閉じた状態で、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第三位置に低下したか否かを判定し、
前記第三位置判定手段によって、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第三位置に低下したと判定されない場合、前記上限値判定手段は、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が大気圧以上の上限値に達したか否かを判定し、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定された場合、前記弁制御手段は、前記ガス管路弁を開いた状態とし、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定されない場合、前記下限値判定手段は、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が大気圧以上の下限値に低下したか否かを判定し、
前記下限値判定手段によって、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が前記下限値に低下したと判定された場合、前記弁制御手段は、前記ガス管路弁を閉じた状態とし、
前記弁制御手段によって前記ガス管路弁が開いた状態とされた後や、前記下限値判定手段によって前記圧力センサの計測値が前記下限値に低下したと判定された場合や、前記弁制御手段によって前記ガス管路弁が閉じた状態とされた後では、前記第三位置判定手段による判定に復帰し、
前記第三位置判定手段によって、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第三位置に低下したと判定された場合、前記弁制御手段は、前記ガス管路弁を開いた状態とし、この後、前記第二位置判定手段による判定に復帰する制御装置。
b:エンジン5に存在する液化ガス燃料Lをドラム10の内部10bに圧送することを終了する際に、エンジン5から制御装置41に燃料圧送終了信号が送信される。
d:燃料供給システム6に存在する液化ガス燃料Lをドラム10の内部10bに圧送することを終了する際に、燃料供給システム6から制御装置41に燃料圧送終了信号が送信される。
排出工程を開始するための処理2:弁12,15が閉じた状態でS207の判定が行われて、S207でNO→S208でYES→S209。
排出工程を継続するための処理3:弁12が閉じ、弁15が開いた状態でS207の判定が行なわれて、S207でNO→S208でNO→S210でNO。
排出工程を終了するための処理4:弁12が閉じ、弁15が開いた状態でS207の判定が行われて、S207でNO→S208でNO→S210でYES→S211。
f:エンジン5及び燃料供給システム6の双方に存在する液化ガス燃料Lをドラム10の内部10bに圧送することを終了する際に、エンジン5及び燃料供給システム6の双方から燃料圧送終了信号が同時に制御装置41に送信される。
排出工程を開始するための処理2:弁12,15が閉じた状態でS303の判定が行われて、S303でNO→S304でYES→S305。
排出工程を継続するための処理3:弁12が閉じ、弁15が開いた状態でS303の判定が行なわれて、S303でNO→S304でNO→S306でNO。
排出工程を終了するための処理4:弁12が閉じ、弁15が開いた状態でS303の判定が行われて、S303でNO→S304でNO→S306でYES→S307。
2 船舶、
3 ベントポスト、
5 エンジン、
6 燃料供給システム、
10 ドラム、
10a ドラムの壁、
10b ドラムの内部、
11 燃料管路、
12 燃料管路弁、
12A 第一の燃料管路弁、
12B 第二の燃料管路弁、
13 加熱手段、
14 ガス管路、
15 ガス管路弁、
20 システム用燃料管路、
21 エンジン用燃料管路、
30 圧力センサ、
40 燃料センサ、
31,41,51 制御装置、
42 終了信号受信時判定手段、
32,44,54 上限値判定手段、
33,45,55 下限値判定手段、
34,46,56 弁制御手段、
43 第一位置判定手段、
52 第二位置判定手段、
53 第三位置判定手段
Claims (9)
- 液化ガス燃料が気化したベントガスをベントポストから排出する船舶に設けられる管路システムであって、
壁で包囲された内部を有するドラムと、
前記液化ガス燃料を前記ドラムの内部に導くための燃料管路と、
前記燃料管路を開閉する燃料管路弁と、
前記ドラムの内部に導かれた前記液化ガス燃料を加熱することで前記ベントガスを発生させる加熱手段と、
前記ドラムの内部に存在する前記ベントガスを前記ベントポストに導くためのガス管路と、
前記ガス管路を開閉するガス管路弁と、を備える管路システム。 - 前記船舶は、燃料供給システムに存在する前記液化ガス燃料をエンジンに供給するものであり、
前記燃料管路は、前記燃料供給システムに存在する前記液化ガス燃料を前記ドラムの内部に導くためのシステム用燃料管路と、前記エンジンに存在する前記液化ガス燃料を前記ドラムの内部に導くためのエンジン用燃料管路とを構成し、
前記燃料管路弁として、前記システム用燃料管路を開閉する第一の燃料管路弁と、前記エンジン用燃料管路を開閉する第二の燃料管路弁とを備える請求項1に記載の管路システム。 - 前記ドラムの壁は、炭素鋼を用いて形成されている請求項1又は2に記載の管路システム。
- 請求項1乃至3のいずれかに記載の管路システムを用いてベントガスを排出する方法であって、
圧送工程と、
前記圧送工程の後に実行される加熱排出工程とを有し、
前記圧送工程では、前記燃料管路弁及び前記ガス管路弁を開いた状態にして、液化ガス燃料を前記燃料管路を介して前記ドラムの内部に圧送することが行われ、
前記加熱排出工程では、
前記燃料管路弁及び前記ガス管路弁が閉じた状態で、前記ドラムの内部の気圧が大気圧以上の上限値に上昇するまでの間、前記ドラムの内部に存在する液化ガス燃料を加熱手段によって加熱してベントガスを発生させる加熱工程と、
前記ドラムの内部の気圧が前記上限値に達した際に前記ガス管路弁を開き、前記ドラムの内部の気圧が大気圧以上の下限値に低下した際に前記ガス管路弁を閉じることで、前記ドラムの内部の気圧が前記上限値から前記下限値に低下するまでの間、前記ドラムの内部に存在するベントガスを、ベントポストに導いてベントポストから排出させる排出工程とが行なわれるベントガスの排出方法。 - 前記圧送工程は、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が、第一位置より高くなるまで行なわれ、
前記加熱排出工程は、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が、第一位置に低下するまで行なわれる、請求項4に記載のベントガスの排出方法。 - 前記圧送工程は、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が、第二位置になるまで行なわれ、
前記加熱排出工程は、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が、前記第二位置から第三位置に低下するまで行なわれ、
前記ドラムの内部に貯留する液化ガス燃料の液面の位置が、前記第三位置になったときに、前記圧送工程に移行する、請求項4に記載のベントガスの排出方法。 - 請求項1乃至3のいずれかに記載の管路システムに設けられるガス管路弁を制御する制御装置であって、
前記管路システムには、前記ドラムの内部の気圧を計測する圧力センサが設けられており、
前記制御装置は、前記燃料管路弁が閉じた状態で、前記ガス管路弁を制御するための手段として、上限値判定手段と、下限値判定手段と、弁制御手段とを有しており、
前記上限値判定手段は、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が、大気圧以上の上限値に達したか否かを判定し、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定された場合、前記弁制御手段は、前記ガス管路弁を開いた状態とし、
前記下限値判定手段は、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が大気圧以上の下限値に低下したか否かを判定し、
前記下限値判定手段によって、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が前記下限値に低下したと判定された場合、前記弁制御手段は、前記ガス管路弁を閉じた状態とし、
前記弁制御手段によって前記ガス管路弁が閉じた状態とされた後、前記上限値判定手段による判定に復帰する制御装置。 - 請求項2に記載の管路システムに設けられる燃料管路弁及びガス管路弁を制御する制御装置であって、
前記管路システムには、前記ドラムの内部の気圧を計測する圧力センサと、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置を計測する燃料センサとが設けられており、
前記制御装置は、終了信号受信時判定手段と、第一位置判定手段と、上限値判定手段と、下限値判定手段と、弁制御手段とを有し、
前記エンジン及び前記燃料供給システムの一方から前記制御装置に燃料圧送開始信号が受信されることに応じて、前記弁制御手段は、前記燃料管路弁及び前記ガス管路弁を開いた状態とし、
前記燃料圧送開始信号の発信元から前記制御装置に燃料圧送終了信号が受信されることに応じて、前記終了信号受信時判定手段は、前記燃料センサの計測値に基づき、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が、第一位置よりも低いか否かを判定し、
前記終了信号受信時判定手段によって、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が、第一位置よりも低いと判定されない場合、前記弁制御手段は、前記燃料管路弁及び前記ガス管路弁を閉じた状態とし、
前記第一位置判定手段は、前記燃料センサの計測値に基づき、前記燃料管路弁及び前記ガス管路弁が閉じた状態で、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が第一位置よりも低いか否かを判定し、
前記第一位置判定手段によって、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が第一位置よりも低いと判定されない場合、前記上限値判定手段は、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が大気圧以上の上限値に達したか否かを判定し、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定された場合、前記弁制御手段は、前記ガス管路弁を開いた状態とし、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定されない場合、前記下限値判定手段は、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が大気圧以上の下限値に低下したか否かを判定し、
前記下限値判定手段によって、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が前記下限値に低下したと判定された場合、前記弁制御手段は、前記ガス管路弁を閉じた状態とし、
前記弁制御手段によって前記ガス管路弁が開いた状態とされた後や、前記下限値判定手段によって前記圧力センサの計測値が前記下限値に低下したと判定された場合や、前記弁制御手段によって前記ガス管路弁が閉じた状態とされた後では、前記第一位置判定手段による判定に復帰し、
前記第一位置判定手段によって、前記ドラムの内部に貯留する前記液化ガス燃料の液面の位置が第一位置よりも低いと判定された場合、前記弁制御手段は、前記ガス管路弁を閉じた状態とする制御装置。 - 請求項1乃至3のいずれかに記載の管路システムに設けられる燃料管路弁及びガス管路弁を制御する制御装置であって、
前記管路システムには、前記ドラムの内部の気圧を計測する圧力センサと、前記ドラムの内部に貯留する前記液化ガス燃料の量を計測する燃料センサとが設けられており、
前記制御装置は、第二位置判定手段と、第三位置判定手段と、上限値判定手段と、下限値判定手段と、弁制御手段とを有し、
前記第二位置判定手段は、前記燃料管路弁及び前記ガス管路弁が開いた状態で、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第二位置に達したか否かを判定し、
前記第二位置判定手段によって、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第二位置に達したと判定された場合、前記弁制御手段は、前記燃料管路弁及び前記ガス管路弁を閉じた状態とし、
前記第三位置判定手段は、前記燃料管路弁が閉じた状態で、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第三位置に低下したか否かを判定し、
前記第三位置判定手段によって、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第三位置に低下したと判定されない場合、前記上限値判定手段は、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が大気圧以上の上限値に達したか否かを判定し、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定された場合、前記弁制御手段は、前記ガス管路弁を開いた状態とし、
前記上限値判定手段によって、前記ガス管路弁が閉じた状態で、前記圧力センサの計測値が前記上限値に達したと判定されない場合、前記下限値判定手段は、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が大気圧以上の下限値に低下したか否かを判定し、
前記下限値判定手段によって、前記ガス管路弁が開いた状態で、前記圧力センサの計測値が前記下限値に低下したと判定された場合、前記弁制御手段は、前記ガス管路弁を閉じた状態とし、
前記弁制御手段によって前記ガス管路弁が開いた状態とされた後や、前記下限値判定手段によって前記圧力センサの計測値が前記下限値に低下したと判定された場合や、前記弁制御手段によって前記ガス管路弁が閉じた状態とされた後では、前記第三位置判定手段による判定に復帰し、
前記第三位置判定手段によって、前記ドラムの内部に貯留する液化ガス燃料の液面の位置が第三位置に低下したと判定された場合、前記弁制御手段は、前記ガス管路弁を開いた状態とし、この後、前記第二位置判定手段による判定に復帰する制御装置。
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