WO2018159106A1 - ボイラ及びボイラを備えた船舶並びにイナートガスの生成方法 - Google Patents

ボイラ及びボイラを備えた船舶並びにイナートガスの生成方法 Download PDF

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Publication number
WO2018159106A1
WO2018159106A1 PCT/JP2018/000374 JP2018000374W WO2018159106A1 WO 2018159106 A1 WO2018159106 A1 WO 2018159106A1 JP 2018000374 W JP2018000374 W JP 2018000374W WO 2018159106 A1 WO2018159106 A1 WO 2018159106A1
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WO
WIPO (PCT)
Prior art keywords
burner
furnace
boiler
inert gas
gas
Prior art date
Application number
PCT/JP2018/000374
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
貴澄 寺原
健太 高本
英輝 天野
Original Assignee
三菱重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to KR1020197024445A priority Critical patent/KR102286089B1/ko
Priority to EP18761294.0A priority patent/EP3591291B1/en
Priority to DK18761294.0T priority patent/DK3591291T3/da
Priority to CN201880013933.0A priority patent/CN110337567B/zh
Publication of WO2018159106A1 publication Critical patent/WO2018159106A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/08—Disposition of burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D23/00—Assemblies of two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/02—Controlling two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/04—Controlling at two or more different localities

Definitions

  • the present invention relates to a boiler and a ship equipped with the boiler, and a method of generating inert gas.
  • the fuel gas in the tank is removed so that the operator can work in the tank, and the atmosphere in the tank is aired. It is necessary to work to the same extent. Inert gas is used to equalize the environment in the tank to the atmosphere. This is because if the air is supplied directly into the tank to eliminate the fuel gas, the fuel gas and the air may undergo a combustion reaction, so the tank is once filled with the inert gas to eliminate the fuel gas. , To supply air into the tank. For this reason, some LNG carriers are equipped with a dedicated device (IGG (Inert gas generator) or the like) for generating inert gas. Further, some crude oil tankers and the like use combustion exhaust gas such as a boiler as inert gas.
  • ISG Inert gas generator
  • Patent Document 1 discloses a VOC gas processing system that uses, as an inert gas, an exhaust gas from a scrubber-cleaned boiler (a gas from which a sulfur component or the like has been removed).
  • a scrubber-cleaned boiler a gas from which a sulfur component or the like has been removed.
  • the inert gas to be used in the LNG carrier must have a severe oxygen content of about 1%, the LNG carrier can not normally use the flue gas from the boiler or the like as the inert gas, and generates the inert gas. It has a dedicated device.
  • Patent No. 5916777 gazette
  • the burner for marine boilers has a large capacity for the purpose of generating predetermined steam, and there is a possibility that more combustion gas may be generated if the purpose is to generate inert gas. Therefore, it is necessary to install a small-capacity burner additionally.
  • the present invention has been made in view of such circumstances, and it is an object of the present invention to provide a boiler capable of generating steam by energy at the time of generating inert gas, a ship equipped with a boiler, and a method of generating inert gas. To aim.
  • a boiler according to an aspect of the present invention is provided separately from a furnace, a first burner that burns a fuel in the furnace, and the first burner, and burns the fuel in the furnace to generate an inert gas. And a burner.
  • the second burner that generates the inert gas in the furnace is provided. Therefore, an inert gas having an oxygen content that does not react with the combustible gas can be generated without providing a dedicated device (IGG (Inert gas generator) or the like) for generating the inert gas.
  • IMG Inert gas generator
  • energy can be used to generate steam when generating inert gas.
  • Inert gas is a gas with an oxygen content that does not react with the flammable gas.
  • the oxygen content which does not react with the flammable gas means an oxygen content which does not ignite in air (for example, atmospheric pressure or the like), and is, for example, 1% or less.
  • the first burner may be disposed in the upper part of the furnace and form a flame downward
  • the second burner may be disposed in the lower part of the furnace.
  • the first burner is disposed in the upper part of the furnace, and the second burner is disposed in the lower part of the furnace.
  • the first burner and the second burner can be disposed at separate positions. Therefore, damage to the first burner by radiation heat of the flame of the second burner can be suppressed, and at the same time, damage to the second burner from radiation heat of the flame of the first burner can be suppressed.
  • the first burner forms a flame downward, the heat flux of the flame of the first burner decreases at the lower part of the furnace. Therefore, by disposing the second burner at the lower part of the furnace, it is possible to further suppress damage to the second burner by the flame of the first burner. Also, since the second burner is disposed away from the first burner, it does not affect the arrangement space of the first burner. Therefore, a sufficient installation space for the first burner can be secured.
  • a boiler according to an aspect of the present invention is provided between a water-cooled wall provided along a furnace bottom of the furnace and a lower side wall of the furnace, and a flame formed by the water-cooled wall and the second burner. And a refractory material.
  • the refractory is provided between the water-cooled wall and the flame formed by the second burner.
  • heat exchange between the flame and the water-cooled wall can be suppressed, so that the flame formed by the second burner is less likely to be cooled by the water-cooled wall. Therefore, since the combustion temperature of the flame formed by the second burner can be maintained high, the combustion of fuel by the second burner is promoted. Therefore, since the oxygen content of the exhaust gas generated by the combustion of the second burner is reduced, the inert gas having a lower oxygen content can be generated by the second burner.
  • the water-cooled wall and the flame do not directly contact, it is possible to suppress the generation of carbon monoxide caused by quenching of the flame.
  • the 2nd burner is arrange
  • a boiler according to an aspect of the present invention includes a wind box for supplying combustion air to the second burner, and a seal inside the wind box during operation of the first burner and when the second burner is stopped. And a fan for supplying gas.
  • the seal air is supplied to the inside of the air box that encloses the second burner while the first burner is in operation and the second burner is stopped.
  • the flame formed by the first burner causes the furnace to be filled with high-temperature combustion gas.
  • the seal gas since the seal gas is supplied to the inside of the air box surrounding the second burner, the high temperature combustion gas which is going to flow from the furnace into the air box is blocked by the seal gas. Therefore, while the second burner is stopped, the high temperature combustion gas does not flow into the air box surrounding the second burner, and the second burner is not exposed to the high temperature combustion gas.
  • a ship includes the boiler described in any of the above and a fuel tank to which the inert gas generated by the boiler is supplied.
  • the inert gas generated by the boiler is supplied to the fuel tank. That is, the exhaust gas of the boiler can be used as the inert gas. Therefore, since there is no need to provide a separate device for generating inert gas, space in the ship can be saved.
  • the boiler since the boiler generates inert gas having an oxygen content rate that does not react with the flammable gas, the fuel tank is not subjected to a process for further reducing the oxygen content rate with respect to the inert gas discharged from the boiler. Can be supplied. Therefore, it is not necessary to separately provide a device for reducing the oxygen content rate, so the structure of the ship can be simplified, and the space in the ship can be saved.
  • the ship according to an aspect of the present invention may be provided with another boiler that is provided separately from the boiler and to which the fuel gas is supplied from the fuel tank.
  • another boiler to which the fuel gas is supplied from the fuel tank is provided separately from the boiler that generates the inert gas.
  • the fuel gas containing the inert gas discharged from the fuel tank can be burned and oxidized in another boiler.
  • a gas fuel unit for example, a GCU (Gas combustion unit)
  • the fuel gas discharged from the fuel tank can be burned and processed by another boiler, and steam can be generated, the generated steam can be used on board, or the generator can be used to generate steam.
  • the turbine is driven to generate power, the energy efficiency of the entire ship can be improved.
  • a method of producing inert gas is provided separately from a furnace, a first burner that burns a fuel in the furnace, and the first burner, and burns a fuel in the furnace to burn combustible gas.
  • a boiler having a second burner that generates an inert gas having an oxygen content rate that does not react with oxygen, and a steam generation unit that generates steam from the combustion exhaust gas generated in the furnace; and burning fuel with only the second burner And a steam generation step of generating steam in the steam generation unit.
  • the inert gas can be generated without providing a dedicated device (IGG (Inert gas generator) or the like) for generating the inert gas.
  • IFG Inert gas generator
  • the energy of the generated inert gas can generate steam.
  • the ship according to the present embodiment is, for example, an LNG carrier 1 that carries LNG.
  • the LNG carrier 1 is equipped with an LNG tank (fuel tank) 2 for storing LNG at the time of transportation, and a boiler 3 for generating inert gas to be supplied into the LNG tank 2 at the time of inspection / repair of the LNG tank 2.
  • the boiler 3 is connected to the LNG tank 2 via an inert gas supply pipe 4.
  • the inert gas flows through the interior of the inert gas supply pipe 4, and the combustion gas generated by the boiler 3 is supplied to the LNG tank 2 through the inert gas supply pipe 4.
  • the inert gas supply pipe 4 is provided with a scrubber 5, a cooler 6, a dryer 7, and a booster fan 8 in this order from the upstream side of the combustion gas flow.
  • the combustion gas flowing in the inert gas supply pipe 4 is subjected to cleaning processing after removing sulfur components, soot and the like by the scrubber 5.
  • the cleaned combustion gas is cooled by the cooler 6 and then dried by the dryer 7.
  • the dried combustion gas is supplied as the inert gas into the LNG tank 2 by the booster 8.
  • a combustion gas discharge pipe 9 branches from between the boiler 3 and the scrubber 5 of the inert gas supply pipe 4. Part of the combustion gas generated by the boiler 3 is discharged from a chimney (not shown) via the inside of the combustion discharge pipe 9.
  • a vent pipe 10 is connected to the LNG tank 2.
  • the fuel gas discharged by supplying the inert gas into the LNG tank 2 is discharged to the atmosphere through the vent pipe 10. Further, when the air is supplied into the LNG tank 2 after the inert gas filling, the inert gas is discharged to the atmosphere through the vent pipe 10.
  • the boiler 3 has the furnace 16 which burns a combustion gas, and the steam production
  • the furnace 16 is a space surrounded by the side water cooling wall 32, the ceiling water cooling wall 22, and the bottom water cooling wall 33.
  • the side water cooling wall 32 is provided along the side wall forming the side of the furnace, the bottom water cooling wall 33 is provided along the furnace bottom forming the lower part of the furnace 16, and the ceiling water cooling wall 22 is , And is provided along the ceiling that constitutes the upper part of the furnace 16.
  • the side water-cooling walls 32 are a front water-cooling wall 23 that constitutes the front of the furnace 16 (a surface facing upward in the drawing in FIG.
  • Each of the side water cooling walls 32 includes a plurality of water cooling pipes 34 extending in the vertical direction and arranged in parallel with a predetermined interval, and water or steam is circulated in the water cooling pipes 34.
  • the ceiling water cooling wall 22 and the bottom water cooling wall 33 are also configured substantially the same as the side water cooling wall 32.
  • the plurality of water cooling pipes 34 constituting the ceiling water cooling wall 22 and the bottom water cooling wall 33 extend in the horizontal direction. In FIG. 2, the water cooling pipe 34 is omitted for the sake of illustration.
  • the furnace 16 is installed in the upper burner (first burner) 18 installed in the upper part of the furnace 16, the upper air box 19 surrounding the upper burner 18, and the lower part of the furnace 16.
  • the upper burner 18 is provided on the ceiling water cooling wall 22 and forms a flame below.
  • the upper burner 18 burns using the LNG in the LNG tank 2 or the oil supplied from the oil supply device as a fuel.
  • the lower burner 20 is provided on the front water-cooling wall 23, and forms a flame in the horizontal direction and in the direction in which the steam generation unit 17 is not provided. That is, the lower burner 20 forms a flame from the front to the rear of the furnace 16. By forming the flame in this manner, the flame does not directly touch the parts and the like that constitute the steam generation unit 17, so that it is possible to prevent damage to the parts that constitute the steam generation unit 17.
  • the lower burner 20 burns using the oil supplied from the oil supply device as a fuel.
  • the lower burner 20 is a small volume burner capable of forming a flame with less combustion air per unit fuel than the upper burner 18.
  • the lower burner 20 is disposed so as to secure the flame length.
  • FIG. 2 and FIG. 3 illustrate an example in which one upper burner 18 and one lower burner 20 are provided, a plurality of upper burners 18 and lower burners 20 may be provided.
  • the steam generating unit 17 includes a front bank tube 28 disposed at the boundary with the furnace 16, an evaporation tube group 29 disposed on the downstream side of the combustion gas flow of the front bank tube 28 and extending in the vertical direction, and an evaporation tube group 29.
  • the partition plate 41 is provided at a substantially central position in the vertical direction, the water drum 30 provided below the evaporation pipe group 29, the steam drum 31 provided above the evaporation pipe group 29, and the inert gas supply pipe 4 And a combustion gas exhaust duct 38 connected thereto.
  • a bottom refractory material (refractory material) 35 is provided so as to cover the bottom water-cooling wall from above.
  • a side refractory 36 (refractory) is provided to cover the wall 44 from the center direction of the furnace 16. That is, the bottom refractory material 35 and the side refractory material 36 are provided between the bottom water-cooling wall 33 and the side water-cooling wall 32 and the flame formed by the lower burner 20.
  • a ceiling refractory 37 is provided between the front bank tube 28 and the ceiling 22.
  • an FD fan 24 for supplying combustion air to the upper burner 18 and the lower burner 20 and an air for combustion from the FD fan 24 are supplied to the upper burner 18 via the upper air box 19 outside the boiler 3.
  • the lower burner air supply passage 26 is provided with a flow control valve 27 for adjusting the flow rate of the circulating combustion air.
  • a plurality of FD fans may be provided, and the FD fan supplying combustion air to the upper burner 18 and the FD fan supplying combustion air to the lower burner 20 may be separated.
  • a steam supply pipe 39 see FIG.
  • a fuel supply pipe 40 for supplying fuel such as light oil to the lower burner 20 and a fuel gas supply pipe 11 for supplying fuel from the inside of the LNG tank 2 to the upper burner 18 and the lower burner 20 are provided. ing.
  • the lower burner 20 burns the fuel supplied via the fuel supply pipe 40 using the combustion air supplied via the lower burner air supply passage 26 to form a flame (second burner combustion step) ).
  • the lower burner 20 is a small volume burner that forms a flame with a small amount of combustion air per unit fuel, and is disposed so as to secure the flame length, so the space in the furnace is effectively used.
  • the combustion gas produced by the combustion of the lower burner 20 has a low oxygen content. Therefore, the oxygen content of the combustion gas introduced into the steam generation unit 17 is low. Specifically, the combustion gas introduced into the steam generation unit 17 has an oxygen content of 1% or less.
  • the combustion gas introduced into the steam generation unit 17 passes through the front bank tube 28 and the evaporation tube group 29 in order and flows through the inside of the front bank tube 28 and the evaporation tube group 29 as shown by the arrow in FIG. Alternatively, it exchanges heat with steam to produce steam (steam generation step).
  • steam generation step When passing through the evaporation tube group 29, it flows so as to turn the partition plate 41 back.
  • the combustion gas which has completed the heat exchange flows from the combustion gas discharge hole 38 into the inert gas supply pipe 4 as the inert gas.
  • the inert gas flowing into the inert gas supply pipe 4 is supplied into the LNG tank 2 by the booster 8 through the scrubber 5, the cooler 6 and the dryer 7.
  • the fuel is supplied only to the upper burner 18 and the fuel is not supplied to the lower burner 20. That is, combustion is performed only by the upper burner 18, and combustion is not performed by the lower burner 20. Even when combustion is not performed by the lower burner 20, when combustion is performed by the upper burner 18, the opening degree of the flow control valve 27 provided in the lower burner air supply path 26 is adjusted to lower a small amount of air.
  • the air is supplied into the wind box 21. Since the air supplied into the lower air box 21 flows into the furnace 16 through the lower air box 21, seal air prevents high temperature combustion gas and the like of the furnace 16 from flowing into the lower air box 21. And play the role of cooling air.
  • the air flowing through the lower burner air supply passage 26 plays the role of combustion air when the lower burner 20 is burned (that is, when the inert gas is generated), and the upper burner 18 burns only.
  • the burner 20 does not burn (i.e., only steam is generated), it plays the role of seal air and cooling air.
  • the lower burner 20 which is a burner for generating the inert gas in the furnace 16 is provided. Therefore, without providing a dedicated device (IGG (Inert gas generator) or the like) for generating inert gas, the boiler 3 generates inert gas having an oxygen content of 1% or less, which is regarded as an oxygen content that does not react with flammable gas. be able to. In addition, energy can be used to generate steam when generating inert gas.
  • IMG Inert gas generator
  • the upper burner 18 is disposed at the upper portion of the furnace 16 and the lower burner 20 is disposed at the lower portion of the furnace 16.
  • the upper burner 18 and the lower burner 20 can be disposed at separate positions. Therefore, damage to the upper burner 18 due to the radiation heat of the flame of the lower burner 20 can be suppressed, and at the same time, damage to the lower burner 20 due to the radiation heat of the flame of the upper burner 18 can be suppressed.
  • the upper burner 18 forms a flame downward, the heat flux of the flame of the upper burner 18 is lowered at the lower part of the furnace 16. Therefore, arranging the lower burner 20 at the lower part of the furnace 16 can further suppress the lower burner 20 from being damaged by the flame of the upper burner 18.
  • the lower burner 20 since the lower burner 20 is disposed apart from the upper burner 18, the lower burner 20 does not affect the arrangement space of the upper burner 18. Therefore, a sufficient installation space for the upper burner 18 can be secured.
  • the side refractory material 36 and the bottom refractory material 35 are provided between the side water cooling wall 32 and the bottom water cooling wall 33 and the flame formed by the lower burner 20.
  • the flame formed by the lower burner 20 is the side water cooling wall 32 and the bottom It becomes difficult to be cooled by the water cooling wall 33. Therefore, since the combustion temperature of the flame formed by the lower burner 20 can be maintained high, the combustion of fuel by the lower burner 20 is promoted. Therefore, since the oxygen content of the combustion gas generated by the combustion of the lower burner 20 is reduced, an inert gas having a lower oxygen content can be generated in the furnace 16.
  • the flame formed by the lower burner 20 does not directly contact the side water cooling wall 32 and the bottom water cooling wall 33, it is possible to suppress the generation of carbon monoxide caused by rapid cooling of the flame.
  • the refractory material is not provided so as to cover the entire surface of the side water-cooling wall 32 of the furnace 16.
  • the front water-cooling wall 23 provided with the lower burner 20 is not provided with a refractory material. With such a configuration, heat absorption in the furnace 16 can be secured.
  • the lower burner 20 is disposed at the lower part of the furnace 16. As a result, the range of the flame formed by the lower burner 20 can be limited, so the range in which the refractory material is provided can be reduced. Moreover, since the refractory material is provided in the bottom part of the furnace 16 and the lower part of the furnace 16, the operation
  • the seal gas is supplied to the inside of the lower air box 21 surrounding the lower burner 20 while the upper burner 18 is in operation and the lower burner 20 is stopped.
  • the flame formed by the upper burner 18 causes the furnace 16 to be filled with high temperature combustion gas.
  • the seal gas is supplied to the inside of the lower air box 21 surrounding the lower burner 20, the high temperature combustion gas which is going to flow from the furnace 16 into the lower air box 21 is blocked by the seal gas. Be Therefore, while the lower burner 20 is stopped, the high temperature combustion gas does not flow into the lower air box 21 and the lower burner 20 is not exposed to the high temperature combustion gas.
  • the inert gas generated by the boiler 3 is supplied to the fuel tank. That is, the combustion exhaust gas of the boiler 3 can be used as the inert gas. Therefore, since there is no need to provide a separate device for generating inert gas, space in the LNG carrier 1 can be saved. Further, since the inert gas having an oxygen content rate of 1% or less, which is determined to have an oxygen content rate that does not react with the flammable gas, is generated in the boiler 3, the oxygen content rate is further reduced with respect to the inert gas discharged from the boiler 3
  • the LNG tank 2 can be supplied without performing the treatment.
  • the present embodiment is basically the same as the first embodiment in that it has basically the same structure as that of the first embodiment, and the LNG carrier 60 is provided with two boilers having different characteristics. Therefore, the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.
  • the LNG carrier 60 has a flammable gas supply pipe 51 branched from the vent pipe 10.
  • the first combustible gas supply pipe 51 is connected to the boiler 50, and the flammable fuel gas in the LNG tank 2 is supplied to the boiler 50 by the supply compressor 52 provided at an intermediate position.
  • a second combustible gas supply pipe 54 for supplying the combustible gas from the LNG tank 2 to the boiler 56 is branched from an intermediate position of the first combustible gas supply pipe 51.
  • the second combustible gas supply pipe 54 may be provided so as to directly connect the LNG tank 2 and the boiler 56 without branching from the middle position of the combustible gas supply pipe 51.
  • the boiler 56 has substantially the same configuration as the boiler 3 described in the first embodiment, but the provided burner is different from the boiler 3. Specifically, the boiler 56 is provided with only a burner 55 that generates inert gas with a low oxygen content, and the burner 55 is provided at the top of the boiler 56.
  • the boiler 50 has substantially the same configuration as the boiler 3 described in the first embodiment, but generates the inert gas having a low oxygen content, the lower burner 20, the lower air box 21, the side refractory 36 and the bottom fireproof It differs from the boiler 3 in that the material 35 is not provided.
  • a boiler 50 to which flammable fuel gas is supplied from the LNG tank 2 is provided separately from the boiler 56 that generates the inert gas.
  • the inert gas is supplied from the boiler 56 that generates the inert gas to the LNG tank 2
  • the combustible fuel gas and the inert gas discharged from the inside of the LNG tank 2 can be burned and processed by the boiler 50. Therefore, the combustible fuel gas and the inert gas discharged from the inside of the LNG tank 2 can be burned and processed by the boiler 50 and steam can be generated, and this steam can be used by the equipment in the LNG carrier 1,
  • the energy efficiency of the entire LNG carrier 1 can be improved.
  • the boiler 56 and the boiler 50 are the boilers having a structure different from that of the boiler 3 described in the first embodiment, but the boilers 56 and 50 have the same structure as the boiler 3 It is also good.
  • the refractory material is not provided on the entire surface of the furnace 16 and the refractory material is not provided on the surface on which the lower burner 20 is provided. May be provided.
  • heat exchange between the flame formed by the lower burner 20 and the side water cooling wall 32 can be further suppressed, and the combustion temperature of the flame formed by the lower burner 20 can be maintained higher.
  • direct contact between the flame formed by the lower burner 20 and the side water cooling wall 32 can be further suppressed, and the generation of carbon monoxide can be further suppressed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Air Supply (AREA)
  • Combustion Of Fluid Fuel (AREA)
PCT/JP2018/000374 2017-02-28 2018-01-10 ボイラ及びボイラを備えた船舶並びにイナートガスの生成方法 WO2018159106A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020197024445A KR102286089B1 (ko) 2017-02-28 2018-01-10 보일러 및 보일러를 구비한 선박 그리고 이너트 가스의 생성 방법
EP18761294.0A EP3591291B1 (en) 2017-02-28 2018-01-10 Boiler, ship comprising boiler, and inert gas generation method
DK18761294.0T DK3591291T3 (da) 2017-02-28 2018-01-10 Kedel, skib omfattende kedel og fremgangsmåde til at generere inert gas
CN201880013933.0A CN110337567B (zh) 2017-02-28 2018-01-10 锅炉及具备锅炉的船舶以及惰性气体的生成方法

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JP2017-035870 2017-02-28
JP2017035870A JP6879778B2 (ja) 2017-02-28 2017-02-28 ボイラ及びボイラを備えた船舶並びにイナートガスの生成方法

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WO2018159106A1 true WO2018159106A1 (ja) 2018-09-07

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EP (1) EP3591291B1 (ko)
JP (1) JP6879778B2 (ko)
KR (1) KR102286089B1 (ko)
CN (1) CN110337567B (ko)
DK (1) DK3591291T3 (ko)
WO (1) WO2018159106A1 (ko)

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Publication number Priority date Publication date Assignee Title
JP7292898B2 (ja) * 2019-02-22 2023-06-19 三菱重工マリンマシナリ株式会社 ボイラ

Citations (5)

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JPS5781999U (ko) * 1980-11-07 1982-05-20
JPS5916777B2 (ja) 1978-03-22 1984-04-17 株式会社日立メデイコ 超音波診断装置
JPS6124400U (ja) * 1984-07-19 1986-02-13 石川島播磨重工業株式会社 船舶等のイナ−トガスヂエネレ−タ
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