WO2015056452A1 - Dispositif de purification des gaz d'échappement marins et système de moteur de navire - Google Patents

Dispositif de purification des gaz d'échappement marins et système de moteur de navire Download PDF

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Publication number
WO2015056452A1
WO2015056452A1 PCT/JP2014/005288 JP2014005288W WO2015056452A1 WO 2015056452 A1 WO2015056452 A1 WO 2015056452A1 JP 2014005288 W JP2014005288 W JP 2014005288W WO 2015056452 A1 WO2015056452 A1 WO 2015056452A1
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Prior art keywords
exhaust
exhaust gas
exhaust line
line
gas
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PCT/JP2014/005288
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English (en)
Japanese (ja)
Inventor
健治 長町
池田　賢治
岳夫 宇井
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川崎重工業株式会社
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Application filed by 川崎重工業株式会社 filed Critical 川崎重工業株式会社
Priority to JP2015542524A priority Critical patent/JP6427103B2/ja
Priority to CN201480057077.0A priority patent/CN105612323B/zh
Priority to KR1020167012337A priority patent/KR101803445B1/ko
Publication of WO2015056452A1 publication Critical patent/WO2015056452A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • 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
    • F02D19/0618—Switch-over from one fuel to another depending on the engine's or vehicle's position, e.g. on/off road or proximity to a harbor
    • 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
    • F02D19/0639—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 characterised by the type of fuels
    • F02D19/0642—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 characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • 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
    • F02D19/0639—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 characterised by the type of fuels
    • F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
    • F02D19/0657—Heavy or light fuel oils; Fuels characterised by their impurities such as sulfur content or differences in grade, e.g. for ships
    • 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
    • F02D19/08—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 simultaneously using pluralities of fuels
    • F02D19/10—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 simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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 marine exhaust gas purification device used for a marine dual fuel diesel engine and a marine engine system equipped with the marine exhaust gas purification device.
  • a dual-fuel diesel engine for ships can be operated by switching between two operation modes: a gas mode in which fuel gas is driven as fuel, and a diesel mode in which fuel oil is driven as fuel.
  • the nitrogen oxide concentration is below the specified value even when operating in the diesel mode.
  • the exhaust gas purification device may be damaged by the explosion of combustible gas, and cannot be applied.
  • the gas mode and the exhaust gas purification device When the exhaust gas purification device is installed in a common exhaust line through which exhaust gas passes in any operation mode of diesel mode, unburned combustible gas contained in the exhaust gas explodes only when operating in the gas mode. If this happens, the exhaust gas purification unit may be damaged. In order to prevent this damage, it is conceivable to make the exhaust gas purifying device have a pressure resistant structure that can withstand explosion.
  • the present invention has been made to solve the above-described problems, and the nitrogen oxide concentration is not more than a specified value even when the dual fuel diesel engine is operated in any of the operation modes of the gas mode and the diesel mode.
  • the exhaust gas purifier can be damaged even if unburned combustible gas in the exhaust gas may explode during operation in the gas mode. It is an object of the present invention to provide a marine exhaust gas purification device and a marine engine system that can prevent the above.
  • the marine exhaust gas purifying apparatus is used for a dual fuel diesel engine that can be operated by switching between two operation modes of a gas mode that uses fuel gas as fuel and a diesel mode that uses fuel oil as fuel.
  • the exhaust gas discharged from the engine is discharged into the atmosphere, and the first exhaust line through which the exhaust gas passes when operating in the gas mode and the diesel mode are operated.
  • An exhaust line having a second exhaust line through which exhaust gas sometimes passes, an exhaust gas purification unit provided in the second exhaust line for reducing nitrogen oxides in the exhaust gas passing through the second exhaust line, Switchable between a first switching state in which exhaust gas is passed through the first exhaust line and a second switching state in which exhaust gas is passed through the second exhaust line It is characterized in further comprising an exhaust line switching unit.
  • the marine exhaust gas purifying apparatus According to the marine exhaust gas purifying apparatus according to the present invention, even if the dual fuel diesel engine is operated in any of the operation modes of the gas mode and the diesel mode, the exhaust gas having a nitrogen oxide concentration below the specified value is discharged into the atmosphere. Can be done.
  • the exhaust line switching unit When the engine is operated in the gas mode, the exhaust line switching unit is switched to the first switching state. As a result, the exhaust gas having a nitrogen oxide concentration equal to or lower than the specified value can be discharged into the atmosphere through the first exhaust line not provided with the exhaust gas purification unit. Since the first exhaust line is not provided with an exhaust gas purification section, even if unburned combustible gas in the exhaust gas may explode in the first exhaust line, the exhaust gas purification is caused by this explosion. The part will not be damaged.
  • the exhaust line switching unit is switched to the second switching state.
  • exhaust gas having a nitrogen oxide concentration exceeding a specified value is purified through a second exhaust line provided with an exhaust gas purification unit, and the nitrogen oxide concentration becomes a specified value or less.
  • the nitrogen oxide concentration becomes a specified value or less.
  • exhaust gas explosion that damages the exhaust gas purification unit does not occur in the second exhaust line, so that the exhaust gas purification unit is not damaged by the exhaust gas explosion.
  • the exhaust line switching unit can be switched to the first switching state to operate in the diesel mode.
  • the exhaust line switching unit is configured to prevent leakage of exhaust gas discharged from the engine and traveling toward the first exhaust line to the second exhaust line side. It is good to have a suppression function.
  • the leakage suppression function of the exhaust line switching unit for example, when the engine is operating in the gas mode and the exhaust line switching unit is in the first switching state, the exhaust gas discharged from the engine and directed to the first exhaust line is , Leakage to the second exhaust line side can be suppressed. As a result, the exhaust gas can be prevented from leaking to the second exhaust line side, and the unburned combustible gas in the exhaust gas can be prevented from exploding in the second exhaust line, and the exhaust gas purification unit can be prevented from being damaged by the explosion. .
  • the exhaust line switching unit has a leakage suppression function for suppressing the exhaust gas discharged from the engine and going to the first exhaust line from leaking to the second exhaust line side, for example, an engine
  • the exhaust gas discharged from the engine and directed to the second exhaust line is prevented from leaking to the first exhaust line side Can do.
  • the exhaust line switching unit has a pressure resistance function for suppressing an explosion of exhaust gas in the first exhaust line from propagating to the second exhaust line side. Good.
  • the air in the marine exhaust gas purifying apparatus when the engine is operated in the gas mode, when the exhaust gas is exhausted to the atmosphere through the first exhaust line, the air is blown by the blower and the air compressor in the ship Compressed air from the engine or supply air for the engine flows into the second exhaust line, and the air in the second exhaust line flows out to the first exhaust line side through the exhaust line switching unit. It is good to let you.
  • the pressure in the second exhaust line is changed by the pressurized air from an air compressor in the ship or an air supply pipe for the engine. It is preferable that the pressure be higher than that in one exhaust line.
  • the marine exhaust gas purifying device may include at least one of an exhaust heat recovery device provided in the first exhaust line and a silencer provided in an outlet line of the exhaust line.
  • exhaust noise can be reduced by the silencer, and noise can be reduced.
  • recovered by the waste heat recovery apparatus can be used for the boiler in a ship, for example. Further, by providing the exhaust heat recovery device not in the second exhaust line but in the first exhaust line, the heat recovery efficiency can be effectively improved.
  • the respective inlets of the first and second exhaust lines are connected to each other, and the respective outlets of the first and second exhaust lines are connected to each other.
  • the unit may be configured to open and close the respective inlets of the first and second exhaust lines and to open and close the outlet of the second exhaust line.
  • the exhaust line switching unit may be equipped with a unit that opens and closes the outlet of the first exhaust line.
  • the first and second exhaust lines can be designed compactly with a simple configuration, and thereby an inexpensive and compact marine exhaust gas purification device can be provided.
  • the exhaust line switching unit in the first switching state in which the exhaust gas can be prevented from entering the second exhaust line while being discharged into the atmosphere through the first exhaust line, the first exhaust line Is opened and the inlet of the second exhaust line is closed. At this time, the outlet of the second exhaust line is closed. Further, when the exhaust line switching unit can open and close the outlet of the first exhaust line, the outlet of the first exhaust line is opened.
  • the inlet of the first exhaust line is closed and the inlet of the second exhaust line is opened. At this time, the outlet of the second exhaust line is opened.
  • the exhaust line switching unit can open and close the outlet of the first exhaust line, the outlet of the first exhaust line is closed.
  • the marine engine system according to the present invention includes the marine exhaust gas purifying apparatus according to the present invention and a dual fuel diesel engine using the marine exhaust gas purifying apparatus.
  • the marine engine system according to the present invention includes the marine exhaust gas purifying device according to the present invention, and the marine exhaust gas purifying device has the same operation as described above.
  • an unburned combustible gas in the exhaust gas explodes in the first exhaust line during operation in the gas mode by providing the exhaust gas purification unit in the second exhaust line. Even if it happens, the exhaust gas purification unit is not damaged by this explosion.
  • the gas mode or the diesel mode can be used as an operation mode in which the concentration of nitrogen oxides of exhaust gas discharged into the atmosphere is less than a specified value.
  • the operation mode can also be selected. Thereby, even when navigating the sea area where the nitrogen oxide concentration in the exhaust gas is regulated, the gas mode and the diesel mode can be arbitrarily selected and used.
  • a marine exhaust gas purifying apparatus according to the present invention and a marine engine system including the same will be described with reference to FIGS. 1 and 2.
  • a marine engine system 11 shown in FIG. 1 includes a dual-fuel diesel engine (hereinafter, simply referred to as “engine”) 12 and a marine exhaust gas purification device 13.
  • This marine exhaust gas purification device 13 discharges exhaust gas 14 having a nitrogen oxide (NOX) concentration below a specified value into the atmosphere regardless of whether the engine 12 is operated in the gas mode or the diesel mode. It can be made to be.
  • NOX nitrogen oxide
  • a ship propulsion engine 12 is mounted in the engine room of the ship, and the exhaust gas 14 discharged from the engine 12 passes through the ship exhaust gas purification device 13 and is discharged from the outlet line 20 to the atmosphere. Is done.
  • the dual fuel diesel engine 12 can be operated by switching between two operation modes: a gas mode in which fuel gas is driven as fuel, and a diesel mode in which fuel oil is driven as fuel.
  • the fuel gas is, for example, natural gas
  • the fuel oil is, for example, heavy oil.
  • the exhaust gas 14 having a lower nitrogen oxide concentration can be discharged from the engine 12 than when the engine 12 is operated in the diesel mode.
  • the exhaust gas 14 having a higher nitrogen oxide concentration is discharged from the engine 12 than when the engine 12 is operated in the gas mode.
  • the emission regulation value of nitrogen oxide for example, It may exceed Tier-3 (tertiary regulation) by IMO (International Maritime Organization).
  • the engine 12 is connected to a first inlet line 16 of an exhaust line 15 for discharging the exhaust gas 14 into the atmosphere.
  • a turbine unit 22 of the feeder 21 is provided.
  • the exhaust turbine supercharger 21 rotates the turbine unit 22 at high speed using the energy (kinetic energy and thermal energy) possessed by the exhaust gas 14 and rotationally drives the compressor unit 23 with the rotational force to supply air. It is a device that compresses (for example, fresh air). The compressed air compressed by the compressor unit 23 is supplied to the engine 12 through the air supply pipe 25 and used for fuel combustion.
  • symbol 24 in a figure is a rotating shaft which connects the turbine part 22 and the compressor part 23 mutually.
  • the marine exhaust gas purification device 13 includes an exhaust line 15, an exhaust gas purification unit 26, and an exhaust line switching unit 27.
  • the exhaust line 15 is an exhaust duct for exhausting exhaust gas 14 exhausted from the engine 12 into the atmosphere.
  • the exhaust line 15 includes a first exhaust line 18 through which the exhaust gas 14 passes when the engine 12 is operated in the gas mode, and a second exhaust line 19 through which the exhaust gas 14 passes when the engine 12 is operated in the diesel mode. Yes.
  • the inlets of the first and second exhaust lines 18 and 19 are connected to each other via the first connection portion 31, and the first and second exhaust lines 18 and 19 are connected to each other.
  • the outlets are connected to each other via the second connection portion 32.
  • the first connection part 31 is connected to the outlet of the turbine part 22 via the second inlet line 17.
  • the outlet line 20 is connected to the second connection portion 32.
  • the exhaust gas purification unit 26 is provided in the second exhaust line 19, and is for reducing the concentration of nitrogen oxides in the exhaust gas 14 passing through the second exhaust line 19.
  • the exhaust gas purification unit 26 is, for example, a urea SCR system.
  • the exhaust line switching unit 27 passes the exhaust gas 14 discharged from the engine 12 through the first exhaust line 18, and as shown in FIG.
  • the switch can be switched to the second switching state through the exhaust line 19, and includes a first switching valve 28, a second switching valve 29, and a third switching valve 30.
  • the first switching valve 28 is for opening and closing the inlet of the first exhaust line 18, and the second switching valve 29 is for opening and closing the inlet of the second exhaust line 19.
  • the third switching valve 30 is for opening and closing the outlet of the second exhaust line 19.
  • the first to third switching valves 28, 29, and 30 allow the exhaust gas 14 discharged from the engine 12 and directed to the first or second exhaust line 18 or 19 to pass through the second or first exhaust line 19 or It has a leakage suppression function for suppressing leakage to the 18th side.
  • At least each of the second and third switching valves 29 and 30 is configured to suppress leakage to prevent the exhaust gas 14 discharged from the engine 12 and going to the first exhaust line 18 from leaking to the second exhaust line 19 side. It preferably has a function.
  • the leakage suppression function means that the exhaust gas 14 flowing through one of the first and second exhaust lines 18, 19 leaks to the other of the first and second exhaust lines 18, 19, so that the other exhaust line ( 18 or 19) refers to a function that does not cause leakage such that the concentration of the combustible gas exceeds the lower explosion limit.
  • Each of the first to third switching valves 28, 29, and 30 may have a pressure resistance function, which will be described later, together with this leakage suppression function. Or it may replace with a leakage suppression function and may have a pressure
  • each of the first to third switching valves 28, 29 and 30 may be a poppet type valve having a valve body and a valve seat.
  • the leakage suppression function may be realized by a structure in which the valve body and the valve seat are in close contact with each other through the seal member when the first to third switching valves 28, 29, and 30 are closed.
  • the first to third switching valves 28, 29, and 30 may be dampers.
  • the leakage suppression function may be realized by a slight gap between the damper and a pipe that accommodates the damper.
  • each of the first to third switching valves 28, 29, 30 may be a switching valve device that prevents leakage by combining a plurality of dampers and feeding pressurized air between the dampers.
  • the pressure resistance function described above is a function for suppressing the explosion of unburned combustible gas in the exhaust gas discharged from the engine 12 and going to the first exhaust line 18 from propagating to the second exhaust line 19 side. . That is, the pressure resistance function of each of the first to third switching valves 28, 29, 30 is that unburned combustible gas in the exhaust gas 14 may explode in the first exhaust line 18 during operation in the gas mode. Even if it exists, it is a function which has the rigidity which can protect so that the exhaust-gas purification
  • the pressure-resistant function has such a strength that when each of the first to third switching valves 28, 29, 30 is exploded on the first exhaust line 18 side, the explosion is not propagated to the second exhaust line 19 side. Can be realized.
  • the marine exhaust gas purifying device 13 configured as described above and the marine engine system 11 including the marine exhaust gas purifying device 13 will be described.
  • the marine engine system 11 shown in FIGS. 1 and 2 even if the dual fuel diesel engine 12 is operated in any one of the gas mode shown in FIG. 2 and the diesel mode shown in FIG.
  • the exhaust gas 14 having a NOX concentration) that is equal to or less than a specified value can be discharged into the atmosphere.
  • the exhaust line switching unit 27 is in the first switching state (the first switching valve 28 is open, the second switching valve 29 is closed, and the third switching valve 30 is Switch to).
  • the exhaust gas 14 having a nitrogen oxide concentration equal to or lower than a specified value can be discharged into the atmosphere through the first exhaust line 18 in which the exhaust gas purification unit 26 is not provided. Since the exhaust gas purification unit 26 is not provided in the first exhaust line 18, even if unburned combustible gas in the exhaust gas 14 may explode in the first exhaust line 18, this explosion Thus, the exhaust gas purification unit 26 is not damaged.
  • the exhaust line switching unit 27 is in the second switching state (the first switching valve 28 is closed, the second switching valve 29 is opened, and the third switching is performed.
  • the valve 30 is switched to open.
  • the exhaust gas 14 having a nitrogen oxide concentration exceeding the specified value is purified through the second exhaust line 19 provided with the exhaust gas purifying unit 26, and the nitrogen oxide concentration becomes less than the specified value.
  • the exhaust gas 14 can be discharged into the atmosphere.
  • the nitrogen oxide concentration of the exhaust gas 14 discharged into the atmosphere is less than the specified value.
  • any one of a gas mode and a diesel mode can be selected.
  • the exhaust line switching unit 27 is switched to the first switching state,
  • the engine 12 can be operated in diesel mode.
  • the first to third switching valves 28, 29, and 30 of the exhaust line switching unit 27 shown in FIGS. 1 and 2 are exhausted from the engine 12 toward the first or second exhaust line 18 or 19. It has a sealing function for suppressing the gas 14 from leaking to the second or first exhaust line 19 or 18 side.
  • the respective inlets of the first and second exhaust lines 18 and 19 are connected to each other, and the respective outlets of the first and second exhaust lines 18 and 19 are connected to each other. Therefore, the 1st and 2nd exhaust lines 18 and 19 can be designed compactly by simple structure, and, thereby, the cheap and compact marine exhaust gas purification apparatus 13 can be provided.
  • FIG. 2 The difference between the marine engine system 35 of the second embodiment shown in FIG. 3 and the marine engine system 11 of the first embodiment shown in FIG. 2 is shown in FIG. 2 while the engine 12 is operating in the gas mode.
  • air is not blown into the second exhaust line 19
  • air is blown into the second exhaust line 19.
  • the configuration in which air is blown into the second exhaust line 19 is such that the exhaust gas 14 is discharged to the atmosphere through the first exhaust line 18 while the engine 12 is operating in the gas mode.
  • the air is being blown, a part of the air supplied from the air blower, the pressurized air from the air compressor in the ship, or the air supply pipe 25 for the engine 12 is caused to flow into the second exhaust line 19 and the second exhaust. This is to prevent unburned gas from flowing into the line 19.
  • the air that has flowed into the second exhaust line 19 flows out to the first exhaust line 18 side via the exhaust line switching unit 27.
  • FIG. 4 The difference between the marine engine system 37 of the third embodiment shown in FIG. 4 and the marine engine system 11 of the first embodiment shown in FIG. 2 is shown in FIG.
  • the pressure in the second exhaust line 19 is not configured to be higher than that in the first exhaust line 18, whereas in the third embodiment shown in FIG.
  • the internal pressure is set to be higher than that in the first exhaust line 18 by the pressurized air from the ship air compressor or the engine supply pipe 25.
  • the configuration in which the pressure in the second exhaust line 19 is set higher than that in the first exhaust line 18 is obtained from the air compressor inside the ship while the engine 12 is operating in the gas mode.
  • a predetermined air pressure (pressure higher than that in the first exhaust line 18) of the pressurized air is applied to the second exhaust line 19.
  • the second exhaust line 19 indicated by a thick diagonal line is a portion where the pressure is high.
  • the marine engine system 39 of the fourth embodiment shown in FIG. 5 is provided with an exhaust heat recovery device 40 and a fourth switching valve 42 in the first exhaust line 18 in the marine engine system 11 of the first embodiment shown in FIG.
  • a silencer 41 is provided at the outlet line 20 of the exhaust line 15.
  • the exhaust heat recovered by the exhaust heat recovery device 40 can be used for, for example, a boiler in a ship. Further, the heat recovery efficiency can be improved by providing the exhaust heat recovery device 40 not in the second exhaust line 19 but in the first exhaust line 18.
  • the reason is that in the second exhaust line 19, the temperature of the exhaust gas 14 is lowered due to the influence of the exhaust gas purification unit 26, and the exhaust gas 14 after passing through the exhaust gas purification unit 26 is exhausted.
  • the recovery device 40 When passed through the recovery device 40, it is due to the influence of chemicals (urea and the like) used for exhaust gas purification and the sulfuric acid component contained in the exhaust gas of the fuel oil (the sulfuric acid component is not included in the exhaust gas of the fuel gas). This is because there is a risk of corrosion.
  • both the exhaust heat recovery device 40 and the silencer 41 are provided, but one of them may be provided instead.
  • the 4th switching valve 42 was provided, you may abbreviate
  • the marine exhaust gas purifying device and the marine engine system according to the present invention have a nitrogen oxide concentration equal to or less than a specified value even when the dual fuel diesel engine is operated in any of the operation modes of the gas mode and the diesel mode.
  • the exhaust gas purification device can be configured to be discharged into the atmosphere, and even if unburned combustible gas in the exhaust gas may explode during operation in the gas mode. Has an excellent effect of preventing damage to the marine vessel, and is suitable for application to such a marine exhaust gas purifying apparatus and marine engine system.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention concerne un dispositif de purification des gaz d'échappement marins comportant : une ligne d'échappement ayant une première ligne d'échappement permettant aux gaz d'échappement de passer en cours de fonctionnement en mode gaz, et une deuxième ligne d'échappement permettant aux gaz d'échappement de passer en cours de fonctionnement en mode diesel ; une section de purification des gaz d'échappement permettant de réduire la concentration d'oxyde d'azote dans les gaz d'échappement passant dans la deuxième ligne d'échappement, la section de purification des gaz d'échappement étant mise en œuvre au niveau de la deuxième ligne d'échappement ; et une partie de commutation de ligne d'échappement capable de commuter entre un premier état commuté pour permettre aux gaz d'échappement de passer dans la première ligne d'échappement, et un deuxième état commuté pour permettre aux gaz d'échappement de passer dans la deuxième ligne d'échappement.
PCT/JP2014/005288 2013-10-17 2014-10-17 Dispositif de purification des gaz d'échappement marins et système de moteur de navire WO2015056452A1 (fr)

Priority Applications (3)

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JP2015542524A JP6427103B2 (ja) 2013-10-17 2014-10-17 舶用排気ガス浄化装置及び船舶機関システム
CN201480057077.0A CN105612323B (zh) 2013-10-17 2014-10-17 船舶用排气净化装置以及船舶发动机系统
KR1020167012337A KR101803445B1 (ko) 2013-10-17 2014-10-17 선박용 배기 가스 정화 장치 및 선박 기관 시스템

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JP2015161461A (ja) * 2014-02-27 2015-09-07 三菱重工業株式会社 混焼エンジン用排熱回収装置および混焼エンジン用排熱回収装置の制御方法
CN107063773A (zh) * 2015-12-10 2017-08-18 株式会社堀场制作所 排气测量装置和排气测量装置的控制方法
JP2018013122A (ja) * 2016-07-20 2018-01-25 マン・ディーゼル・アンド・ターボ・エスイー 内燃機関の運転方法及び内燃機関
JP2018119514A (ja) * 2017-01-27 2018-08-02 ヤンマー株式会社 排気ガス浄化装置
EP3431731A1 (fr) * 2017-07-18 2019-01-23 Caterpillar Motoren GmbH & Co. KG Protection de capteur de nox pour un moteur à combustion interne
EP3754171A1 (fr) * 2015-09-16 2020-12-23 Yanmar Co., Ltd. Dispositif de moteur
WO2023195260A1 (fr) * 2022-04-06 2023-10-12 三菱重工業株式会社 Système de traitement de méthane de rejet et système de moteur

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JP2015161461A (ja) * 2014-02-27 2015-09-07 三菱重工業株式会社 混焼エンジン用排熱回収装置および混焼エンジン用排熱回収装置の制御方法
EP3754171A1 (fr) * 2015-09-16 2020-12-23 Yanmar Co., Ltd. Dispositif de moteur
CN107063773A (zh) * 2015-12-10 2017-08-18 株式会社堀场制作所 排气测量装置和排气测量装置的控制方法
JP2018013122A (ja) * 2016-07-20 2018-01-25 マン・ディーゼル・アンド・ターボ・エスイー 内燃機関の運転方法及び内燃機関
JP2018119514A (ja) * 2017-01-27 2018-08-02 ヤンマー株式会社 排気ガス浄化装置
WO2018139023A1 (fr) * 2017-01-27 2018-08-02 ヤンマー株式会社 Dispositif d'épuration de gaz d'échappement
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EP3431731A1 (fr) * 2017-07-18 2019-01-23 Caterpillar Motoren GmbH & Co. KG Protection de capteur de nox pour un moteur à combustion interne
WO2023195260A1 (fr) * 2022-04-06 2023-10-12 三菱重工業株式会社 Système de traitement de méthane de rejet et système de moteur

Also Published As

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JPWO2015056452A1 (ja) 2017-03-09
JP6427103B2 (ja) 2018-11-21
CN105612323A (zh) 2016-05-25
KR101803445B1 (ko) 2017-12-28
KR20160060769A (ko) 2016-05-30
CN105612323B (zh) 2018-06-12

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