WO2024214360A1 - 酸化触媒昇温システム、内燃機関システム及び酸化触媒装置昇温方法 - Google Patents

酸化触媒昇温システム、内燃機関システム及び酸化触媒装置昇温方法 Download PDF

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Publication number
WO2024214360A1
WO2024214360A1 PCT/JP2024/001879 JP2024001879W WO2024214360A1 WO 2024214360 A1 WO2024214360 A1 WO 2024214360A1 JP 2024001879 W JP2024001879 W JP 2024001879W WO 2024214360 A1 WO2024214360 A1 WO 2024214360A1
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Prior art keywords
oxidation catalyst
exhaust gas
gas
combustion engine
internal combustion
Prior art date
Application number
PCT/JP2024/001879
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English (en)
French (fr)
Japanese (ja)
Inventor
圭三 小林
芳幸 小野
Original Assignee
三菱重工業株式会社
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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 KR1020257019676A priority Critical patent/KR20250108708A/ko
Priority to CN202480005758.6A priority patent/CN120435618A/zh
Publication of WO2024214360A1 publication Critical patent/WO2024214360A1/ja

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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
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • 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
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • 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
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • 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
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • 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
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus

Definitions

  • the present disclosure relates to an oxidation catalyst temperature-raising system for raising the temperature of an oxidation catalyst device, an internal combustion engine system including the oxidation catalyst temperature-raising system, and a method for raising the temperature of an oxidation catalyst device.
  • An oxidation catalyst device contains an oxidation catalyst for oxidizing exhaust gas emitted from an internal combustion engine.
  • an oxidation catalyst for oxidizing exhaust gas emitted from an internal combustion engine.
  • the oxidation catalyst e.g., methane oxidation catalyst
  • the thermal energy of the exhaust gas introduced into the oxidation catalyst device and the thermal energy generated by the oxidation reaction of the exhaust gas are transferred to the oxidation catalyst device, so the oxidation catalyst device is kept at a relatively high temperature.
  • the oxidation catalyst device is cooled by the surrounding outside air, and may reach a temperature similar to that of the outside air. In this case, when the oxidation catalyst device is first used, it may take a long time for the catalyst to heat up before the oxidation catalyst can perform its functions.
  • Patent Document 1 discloses that a catalyst for treating ammonia and nitrogen oxides is housed in a casing, and a bypass flow path for exhaust gas is provided on the outer periphery of the casing in the direction of the flow of exhaust gas inside the casing.
  • the outer periphery of the catalyst can be kept warm by the exhaust gas flowing through the bypass flow path, but the inner periphery of the catalyst is not kept warm enough, and there is a risk that a long period of time will be required for the catalyst to heat up before the inner periphery of the catalyst can demonstrate its performance.
  • At least one embodiment of the present disclosure aims to provide an oxidation catalyst heating system, an internal combustion engine system, and an oxidation catalyst device heating method that can effectively heat an oxidation catalyst device while the oxidation catalyst device is out of use.
  • An oxidation catalyst warming system includes: an exhaust gas line through which exhaust gas discharged from the internal combustion engine flows; a catalyst casing that is provided in the exhaust gas line and that houses an oxidation catalyst device including a plurality of oxidation catalyst elements configured to oxidize the exhaust gas; and at least one heated gas pipe through which heated gas flows for heating the oxidation catalyst device, the at least one heated gas pipe being arranged inside the catalyst casing and between a pair of adjacently arranged oxidation catalyst elements among the plurality of oxidation catalyst elements.
  • an internal combustion engine system includes: The oxidation catalyst heating system; The internal combustion engine; An internal combustion engine system including: a first exhaust gas path switching device configured to be able to switch a path of the exhaust gas discharged from the internal combustion engine, the oxidation catalyst device includes a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas, the internal combustion engine includes a dual fuel engine capable of switching between a first fuel containing methane as an exhaust gas component and a second fuel containing no methane as an exhaust gas component,
  • the first exhaust gas path switching device is The exhaust gas discharged from the internal combustion engine while the internal combustion engine is operating using the first fuel as fuel is guided to the catalyst casing, and the exhaust gas discharged from the internal combustion engine while the internal combustion engine is operating using the second fuel as fuel is guided to the at least one heated gas pipe.
  • a method for increasing the temperature of an oxidation catalyst device includes: 1.
  • a method for increasing the temperature of an oxidation catalyst device configured to oxidize exhaust gas discharged from an internal combustion engine comprising: the oxidation catalyst device includes a plurality of oxidation catalyst elements each including a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas; the internal combustion engine includes a dual fuel engine capable of switching between a first fuel containing methane as an exhaust gas component and a second fuel containing no methane as an exhaust gas component,
  • the oxidation catalyst device temperature increasing method includes the steps of: a first operating step of introducing the exhaust gas discharged from the internal combustion engine into a catalyst casing that houses the oxidation catalyst device while the internal combustion engine is operating using the first fuel; and a second operating step of introducing the exhaust gas discharged from the internal combustion engine into at least one heated gas pipe that is disposed inside the catalyst casing and between a pair of adjacently disposed oxidation catalyst elements among the pluralit
  • At least one embodiment of the present disclosure provides an oxidation catalyst heating system, an internal combustion engine system, and an oxidation catalyst device heating method that can effectively heat up an oxidation catalyst device while the oxidation catalyst device is out of use.
  • FIG. 1 is a schematic diagram of an internal combustion engine system according to one embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram of an internal combustion engine system according to one embodiment of the present disclosure.
  • FIG. 2 is a schematic cross-sectional view of a catalyst casing of an oxidation catalyst warming system according to an embodiment of the present disclosure.
  • 4 is a schematic cross-sectional view of the catalyst casing shown in FIG. 3 taken along line AB.
  • FIG. 4 is a schematic cross-sectional view of the catalyst casing shown in FIG. 3 taken along line CD.
  • 4 is a schematic cross-sectional view of the catalyst casing shown in FIG. 3 taken along line EF.
  • FIG. FIG. 2 is a schematic cross-sectional view of a catalyst casing of an oxidation catalyst warming system according to an embodiment of the present disclosure.
  • 8 is a schematic cross-sectional view of the catalyst casing shown in FIG. 7 taken along line GH.
  • FIG. 1 is a schematic diagram of an internal combustion engine system 1 according to an embodiment of the present disclosure.
  • the internal combustion engine system 1 includes an oxidation catalyst temperature increase system 2 and a first internal combustion engine 11.
  • the oxidation catalyst temperature increase system 2 includes a first exhaust gas line 12 through which a first exhaust gas, which is exhaust gas discharged from the internal combustion engine 11, flows.
  • the first exhaust gas line 12 forms a flow path for circulating the first exhaust gas, and is formed by, for example, piping.
  • the internal combustion engine system 1 may further include a first generator 110 connected to the first internal combustion engine 11 and generating electricity using power generated by the first internal combustion engine 11.
  • An oxidation catalyst warming system 2 is mounted on an internal combustion engine system 1. As shown in Figures 1 and 2, the oxidation catalyst warming system 2 includes the above-mentioned first exhaust gas line 12, an oxidation catalyst device 3, and a catalyst casing 4. The catalyst casing 4 is provided in the first exhaust gas line 12 and is configured to house the oxidation catalyst device 3.
  • the upstream side when simply referring to the upstream side, it refers to the upstream side along the main flow direction of the fluid in the part or area to which the directional description is applied.
  • the downstream side when simply referring to the downstream side, it refers to the downstream side along the main flow direction of the fluid in the part or area to which the directional description is applied.
  • the flow direction of the first exhaust gas flowing through the catalyst casing 4 is defined as a first direction RD1.
  • the first exhaust gas flows from the bottom to the top in the vertical direction through the catalyst casing 4. That is, in the illustrated embodiment, the first direction RD1 means a direction from the vertical bottom to the vertical top.
  • FIG. 3 and 7 are schematic cross-sectional views of the catalyst casing 4 of the oxidation catalyst heating system 2 according to one embodiment of the present disclosure.
  • Figs. 3 and 7 show a cross-section of the catalyst casing 4 along the first direction RD1.
  • Fig. 4 is a schematic cross-sectional view of the catalyst casing 4 shown in Fig. 3 taken along line A-B.
  • Fig. 5 is a schematic cross-sectional view of the catalyst casing 4 shown in Fig. 3 taken along line C-D.
  • Fig. 6 is a schematic cross-sectional view of the catalyst casing 4 shown in Fig. 3 taken along line E-F.
  • Fig. 8 is a schematic cross-sectional view of the catalyst casing 4 shown in Fig. 7 taken along line G-H.
  • the catalyst casing 4 is formed in a rectangular tube shape extending along a first direction (vertical direction) as shown in Figures 3 and 7, and includes a casing main body 41 having a first internal space 40 through which the first exhaust gas flows from the upstream side to the downstream side in the first direction.
  • the oxidation catalyst device 3 is disposed in the first internal space 40 and extends along a direction intersecting the first direction (in the illustrated example, a horizontal direction perpendicular to the first direction).
  • the first internal space 40 is divided by the oxidation catalyst device 3 into an upstream side and a downstream side in the first direction.
  • the casing body 41 is formed with a first exhaust gas inlet 42 at its upstream end in the first direction for introducing the first exhaust gas from outside the casing body 41 into the first internal space 40.
  • the casing body 41 is formed with a first exhaust gas outlet 43 at its downstream end in the first direction for discharging the first exhaust gas from the first internal space 40 to outside the casing body 41.
  • the first exhaust gas line 12 includes a first upstream exhaust gas line 12A for guiding the first exhaust gas from the internal combustion engine 11 to the catalyst casing 4, and a first downstream exhaust gas line 12B for guiding the first exhaust gas from the catalyst casing 4 to the downstream side in the flow direction of the first exhaust gas.
  • the first upstream exhaust gas line 12A has an upstream end connected to the internal combustion engine 11, and a downstream end connected to the first exhaust gas inlet 42 of the catalyst casing 4.
  • the first downstream exhaust gas line 12B has an upstream end connected to the first exhaust gas outlet 43 of the catalyst casing 4.
  • the first exhaust gas flows through the first exhaust gas line 12 and is guided from the first exhaust gas inlet 42 to the first internal space 40.
  • the oxidation of at least one of the exhaust gas components e.g., methane
  • the first exhaust gas that has passed through the oxidation catalyst device 3 is discharged from the first exhaust gas outlet 43 to the outside of the casing main body 41 (the first downstream exhaust gas line 12B).
  • the oxidation catalyst device 3 includes a plurality of oxidation catalyst elements 31 configured to oxidize the first exhaust gas.
  • Each of the plurality of oxidation catalyst elements 31 includes an oxidation catalyst that promotes the oxidation of at least one of components (exhaust gas components) included in the exhaust gas.
  • each of the plurality of oxidation catalyst elements 31 is formed as a hexahedron (e.g., a cube or a rectangular parallelepiped) having six quadrangular faces.
  • Each of the plurality of oxidation catalyst elements 31 includes a methane oxidation catalyst that promotes the oxidation of methane included in the exhaust gas.
  • the oxidation catalyst e.g., methane oxidation catalyst contained in the oxidation catalyst device 3
  • the thermal energy of the first exhaust gas flowing through the first internal space 40 of the catalyst casing 4 and the thermal energy generated by the oxidation reaction of the first exhaust gas are transferred to the oxidation catalyst device 3, so that the oxidation catalyst device 3 is kept at a relatively high temperature.
  • the oxidation catalyst device 3 is not in use, the oxidation catalyst device 3 is cooled by the outside air around the catalyst casing 4, and may reach a temperature similar to that of the outside air. In this case, when starting to use the oxidation catalyst device 3, it may take a long time for the catalyst to heat up before the oxidation catalyst can maximize its performance.
  • the oxidation catalyst heating system 2 further includes at least one (in the illustrated example, a plurality of) heating gas pipes 5.
  • the oxidation catalyst heating system 2 is configured to heat the oxidation catalyst included in the oxidation catalyst device 3 by the heating gas flowing through the at least one heating gas pipe 5.
  • each of the plurality of heating gas pipes 5 is configured to allow the first exhaust gas discharged from the first internal combustion engine 11 to flow as the heating gas.
  • the internal combustion engine system 1 further includes a second internal combustion engine 13 different from the first internal combustion engine 11, and a second exhaust gas line 14 through which a second exhaust gas, which is an exhaust gas discharged from the internal combustion engine 13, flows.
  • the internal combustion engine system 1 may further include a second generator 130 connected to the second internal combustion engine 13 and generating electricity using the power generated by the second internal combustion engine 13.
  • each of the plurality of heating gas pipes 5 is configured to allow the second exhaust gas discharged from the second internal combustion engine 13 to flow as the heating gas.
  • the heating gas may be any gaseous heat medium capable of heating the oxidation catalyst device 3, and is not limited to the first exhaust gas or the second exhaust gas.
  • the heated gas may be exhaust gas discharged from the main engine, which is the internal combustion engine used to propel the ship.
  • the multiple heated gas pipes 5 are arranged inside the catalyst casing 4 and are arranged between a pair of adjacent oxidation catalyst elements 31 among the multiple oxidation catalyst elements 31.
  • each of the multiple heated gas pipes 5 extends in the same direction as the other heated gas pipes 5.
  • each of the multiple heated gas pipes 5 is arranged at intervals in a direction intersecting (orthogonal in the illustrated example) the extending direction of the heated gas pipes 5 (left-right direction in the figure) when viewed from the first direction RD1.
  • each of the multiple oxidation catalyst elements 31 is arranged between a pair of adjacent heated gas pipes 5 in a direction intersecting the extending direction of the heated gas pipes 5 when viewed from the first direction RD1. It is preferable that each of the multiple oxidation catalyst elements 31 is arranged to abut against the pair of adjacent heated gas pipes 5.
  • the oxidation catalyst element 31 may be arranged between a pair of heated gas pipes 5 arranged at an interval in the first direction.
  • the oxidation catalyst device 3 can be heated by the heating gas flowing through the at least one heating gas pipe 5 while the oxidation catalyst device 3 is not in use.
  • the at least one heating gas pipe 5 is disposed between a pair of oxidation catalyst elements 31 disposed adjacent to each other inside the catalyst casing 4, so that the thermal energy of the heating gas flowing through the heating gas pipe 5 can be efficiently transferred to each of the pair of oxidation catalyst elements 31 sandwiching the heating gas pipe 5. This allows the entire oxidation catalyst device 3 to be effectively heated, and shortens the catalyst heating time required for the oxidation catalyst to demonstrate its performance when the oxidation catalyst device 3 starts to be used.
  • the oxidation catalyst device 3 (oxidation catalyst element 31) described above includes a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas.
  • a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas.
  • the methane oxidation catalyst in order to make the methane oxidation catalyst perform its function, it is necessary to keep the methane oxidation catalyst (oxidation catalyst device 3) at a relatively high temperature, but the methane oxidation catalyst can be heated by the heating gas flowing through at least one heating gas pipe 5 described above. This makes it possible to shorten the catalyst heating time required for the methane oxidation catalyst to perform its function when the oxidation catalyst device 3 is first used.
  • each of the multiple heated gas pipes 5 described above extends in a direction intersecting with the first direction RD1 described above.
  • each of the multiple heated gas pipes 5 extends in a direction intersecting with the flow direction (first direction RD1) of the exhaust gas flowing inside the catalyst casing 4, so that the thermal energy of the heated gas flowing through these heated gas pipes 5 can be efficiently transmitted throughout the entire oxidation catalyst device 3 arranged inside the catalyst casing 4. This allows the temperature of the oxidation catalyst device 3 to be effectively raised.
  • each of the above-mentioned multiple heated gas pipes 5 is made of a rectangular duct having a cross-sectional shape formed into a rectangle having a pair of long sides and a pair of short sides. As shown in FIG. 5, each of the above-mentioned multiple heated gas pipes 5 has a pair of long side portions 51, 52 having the above-mentioned long sides of the heated gas pipe 5 abutting a pair of oxidation catalyst elements 31 arranged adjacent to the heated gas pipe 5.
  • each of the outer surfaces of a pair of long sides 51, 52, which have a relatively large area, of each of the above-mentioned multiple heated gas pipes 5 abuts the oxidation catalyst element 31.
  • the thermal energy of the heated gas flowing through the heated gas pipe 5 having the pair of long sides 51, 52 can be directly and efficiently transferred to each of the oxidation catalyst elements 31 facing the pair of long sides 51, 52. This allows the oxidation catalyst device 3 to be effectively heated.
  • the at least one heated gas pipe 5 includes a plurality of heated gas pipes 5 arranged at intervals in a direction intersecting the extension direction of the heated gas pipe 5 (left-right direction in the figure) when viewed from the first direction RD1, as shown in Figures 4 and 8.
  • the oxidation catalyst heating system 2 described above further includes a plurality of partition plates 6 whose both ends are connected to a pair of heated gas pipes 5 arranged adjacent to each other in a direction intersecting the extension direction of the heated gas pipe 5 among the plurality of heated gas pipes 5 when viewed from the first direction RD1.
  • the plurality of partition plates 6 are arranged at intervals in the extension direction of the heated gas pipe 5.
  • Each of the plurality of partition plates 6 has one end connected to one heated gas pipe 5 of the pair of heated gas pipes 5 and the other end connected to the other heated gas pipe 5.
  • each of the multiple partition plates 6 is made of a metal plate extending in a direction intersecting (orthogonal in the illustrated example) the extension direction of the heated gas pipes 5.
  • Each of the multiple partition plates 6 has one end (one end) in the direction intersecting the extension direction of the heated gas pipes 5 fixed to one of the pair of heated gas pipes 5 by welding or the like, and the other end (the other end) in the direction intersecting the extension direction of the heated gas pipes 5 fixed to the other of the pair of heated gas pipes 5 by welding or the like.
  • a plurality of spaces 400 are formed, partitioned by the pair of heated gas pipes 5 and a plurality of partition plates 6 connected at both ends to the pair of heated gas pipes 5.
  • a plurality of spaces 400 may be formed at intervals in the extension direction of the heated gas pipes 5, or a plurality of spaces 400 may be formed at intervals in a direction intersecting the extension direction of the heated gas pipes 5.
  • Each of the oxidation catalyst elements 31 is accommodated in one of the spaces 400 described above.
  • Each of the oxidation catalyst elements 31 is supported by at least one of the pair of heated gas pipes 5 or the pair of partition plates 6 that define the space 400 that accommodates the oxidation catalyst element 31. It is preferable that each of the oxidation catalyst elements 31 is in contact with each of the pair of partition plates 6 that define the space 400 that accommodates the oxidation catalyst element 31.
  • the thermal energy of the heated gas flowing through the pair of heated gas pipes 5 is transferred from the pair of heated gas pipes 5 to the pair of partition plates 6, and then transferred from the pair of partition plates 6 to the oxidation catalyst element 31 that abuts against the pair of partition plates 6.
  • the oxidation catalyst element 31 can be heated by the thermal energy transferred from the pair of partition plates 6, so that the oxidation catalyst element 31 can be effectively heated.
  • the oxidation catalyst element 31 can be accommodated in each of the spaces 400 partitioned by the pair of heated gas pipes 5 and the multiple partition plates 6, making it easy to position the oxidation catalyst element 31.
  • the thermal energy of the heated gas flowing through the pair of heated gas pipes 5 is transferred to the oxidation catalyst element 31 accommodated in the space 400 via the pair of heated gas pipes 5 and the multiple partition plates 6 that surround the oxidation catalyst element 31. This allows the temperature to be effectively increased throughout the entire oxidation catalyst element 31 accommodated in the space 400.
  • the oxidation catalyst heating system 2 may have a combination of multiple stages arranged side by side in the first direction as shown in FIG. 5.
  • each of the plurality of heating gas pipes 5 is configured so that the heating gas flows from one side (right side in the figure) to the other side (left side in the figure) in the extension direction (left-right direction in the figure) of the heating gas pipe 5.
  • RD2 in Fig. 4 indicates the flow direction of the heating gas flowing through the heating gas pipe 5.
  • each of the above-mentioned multiple heated gas pipes 5 includes at least one (in the illustrated example, multiple) first heated gas pipes 5A through which heated gas flows from one side (right side in the figure) to the other side (left side in the figure) in the extension direction (left-right direction in the figure) of the heated gas pipe 5, and at least one (in the illustrated example, multiple) second heated gas pipes 5B through which heated gas flows from the other side (left side in the figure) to the one side (right side in the figure) in the extension direction of the heated gas pipe 5.
  • RD2 in FIG. 7 and FIG. 8 indicates the flow direction of heated gas flowing through the first heated gas pipe 5A
  • RD3 in FIG. 7 and FIG. 8 indicates the flow direction of heated gas flowing through the second heated gas pipe 5B.
  • the heated gas pipes 5 (5A) of each stage have a heated gas flow direction opposite to that of the heated gas pipes 5 (5B) of the adjacent stage in the first direction.
  • the heated gas pipes 5 (5A) of each stage have a heated gas flow direction opposite to that of the adjacent heated gas pipes 5 (5B) of the same stage.
  • the heated gas pipes 5 constituting one stage may have the same heated gas flow direction
  • the heated gas pipes 5 constituting another stage adjacent to the first stage may have a heated gas flow direction opposite to that of the heated gas pipes 5 constituting the first stage.
  • the flow directions of the exhaust gas flowing through the at least one first heated gas pipe 5A and the exhaust gas flowing through the at least one second heated gas pipe 5B are opposite to each other, so that the heat transfer from the heated gas flowing through the multiple heated gas pipes 5A and 5B to the oxidation catalyst device 3 can be prevented from being biased in the extension direction of the heated gas pipes 5.
  • This allows the entire oxidation catalyst device 3 to be heated uniformly, and the catalyst heating time required for the oxidation catalyst to demonstrate its performance when the oxidation catalyst device 3 begins to be used can be shortened.
  • a heated gas inlet for introducing heated gas from the outside into the heated gas pipe 5 is formed at one end in the extending direction of the plurality of heated gas pipes 5 (5A, 5B) described above.
  • a heated gas outlet for discharging heated gas from the heated gas pipe 5 to the outside is formed at the other end in the extending direction of the plurality of heated gas pipes 5 (5A, 5B) described above.
  • the oxidation catalyst heating system 2 described above further includes an inlet gas duct 21 attached to the catalyst casing 4 and an outlet gas duct 22 attached to the catalyst casing 4.
  • Each of the multiple heated gas pipes 5 has a heated gas inlet connected to the common inlet gas duct 21 and a heated gas outlet connected to the common outlet gas duct 22.
  • the inlet gas duct 21 has an internal space 210 between it and the catalyst casing 4 through which the heated gas flows before being introduced into the heated gas pipes 5.
  • the inlet gas duct 21 has an inlet 211 for introducing heated gas into the inside of the inlet gas duct 21 (internal space 210), and a number of communication holes 212 that respectively connect the internal space 210 of the inlet gas duct 21 to each of the heated gas inlets of the multiple heated gas pipes 5.
  • the outlet gas duct 22 has an internal space 220 between it and the catalyst casing 4, through which the heated gas that has passed through the heated gas pipes 5 flows.
  • the outlet gas duct 22 has an exhaust port 221 for exhausting the heated gas from the inside (internal space 220) of the outlet gas duct 22, and a number of communication holes 222 that respectively connect the internal space 220 of the outlet gas duct 22 to each of the heated gas exhaust ports of the multiple heated gas pipes 5.
  • the inlet gas duct 21 is attached to one end of the catalyst casing 4 (the end on one side (right side in the figure) in the extension direction (left-right direction in the figure) of the heated gas piping 5).
  • the outlet gas duct 22 is attached to the other end of the catalyst casing 4 (the end on the other side (left side in the figure) in the extension direction (left-right direction in the figure) of the heated gas piping 5).
  • the inlet gas duct 21 includes a first inlet gas duct 21A in which an internal space 210A is formed through which the heated gas flows before being introduced into the first heated gas pipe 5A, and a second inlet gas duct 21B in which an internal space 210B is formed through which the heated gas flows before being introduced into the second heated gas pipe 5B.
  • the outlet gas duct 22 includes a first outlet gas duct 22A in which an internal space 220A is formed through which the heated gas that has passed through the first heated gas pipe 5A flows, and a second outlet gas duct 22B in which an internal space 220B is formed through which the heated gas that has passed through the second heated gas pipe 5B flows.
  • Each of the multiple first heated gas pipes 5A has a heated gas inlet connected to a common first inlet gas duct 21A, and a heated gas outlet connected to a common first outlet gas duct 22A.
  • Each of the multiple second heated gas pipes 5B has a heated gas inlet connected to a common second inlet gas duct 21B, and a heated gas outlet connected to a common second outlet gas duct 22B.
  • the first inlet gas duct 21A and the second outlet gas duct 22B are provided on the one side (right side in the figure) of the heated gas duct 5 in the extension direction of the heated gas duct 5.
  • the second outlet gas duct 22B is provided on the one side of the first inlet gas duct 21A, but it may be provided on the other side (left side in the figure) of the first inlet gas duct 21A.
  • the first inlet gas duct 21A and the second outlet gas duct 22B are formed by a first gas duct body 44 that forms an internal space including the internal space 210A and the internal space 220B, and a partition wall 45 that divides the internal space of the first gas duct body 44 into the internal space 210A and the internal space 220B.
  • the partition wall 45 extends along a direction that intersects (orthogonal in the illustrated example) with the extension direction of the heating gas pipe 5.
  • the second inlet gas duct 21B and the first outlet gas duct 22A are provided on the other side (left side in the figure) of the heated gas duct 5 in the extension direction of the heated gas duct 5.
  • the first outlet gas duct 22A is provided on the other side of the second inlet gas duct 21B, but it may be provided on the one side (right side in the figure) of the second inlet gas duct 21B.
  • the second inlet gas duct 21B and the first outlet gas duct 22A are formed by a second gas duct body 46 that forms an internal space including the internal space 210B and the internal space 220A, and a partition wall 47 that divides the internal space of the second gas duct body 46 into the internal space 210B and the internal space 220A.
  • the partition wall 47 extends along a direction that intersects (orthogonal in the illustrated example) with the extension direction of the heating gas pipe 5.
  • the inlet gas ducts 21A and 21B are provided with inlets 211A and 211B for introducing heated gas into the interiors of the inlet gas ducts 21A and 21B (internal spaces 210A and 210B), and multiple communication holes 212A and 212B that connect the internal spaces 210A and 210B of the inlet gas ducts 21A and 21B to the heated gas inlets of the multiple heated gas pipes 5.
  • the outlet gas ducts 22A, 22B are formed with exhaust ports 221A, 221B for discharging heated gas from the insides (internal spaces 220A, 220B) of the outlet gas ducts 22A, 22B, and with a number of communication holes 222A, 222B that respectively connect the internal spaces 220A, 220B of the outlet gas ducts 22A, 22B to the heated gas exhaust ports of the plurality of heated gas pipes 5.
  • the first gas duct body 44 is formed with the inlet 211A, the outlet 221B, and the plurality of communication holes 212A described above, as shown in FIG. 7.
  • the first gas duct body 44 is formed with a plurality of insertion holes 441 through which the second heating gas pipes 5B are respectively inserted.
  • the partition wall 45 is formed with the plurality of communication holes 222B described above.
  • the second gas duct body 46 is formed with the inlet 211B, outlet 221A, and multiple communication holes 212B as shown in FIG. 7.
  • the second gas duct body 46 is formed with multiple insertion holes 461 through which the first heating gas pipes 5A are respectively inserted.
  • the partition wall 47 is formed with the multiple communication holes 222A as described above.
  • the inlets 211A, 211B and outlets 221A, 221B as described above open vertically upward.
  • the difference in temperature and flow rate of the exhaust gas introduced from the inlet gas duct 21 to the multiple heating gas pipes 5 can be reduced.
  • the difference in temperature and flow rate of the exhaust gas discharged from the multiple heating gas pipes 5 to the outlet gas duct 22 can be reduced.
  • the plurality of heating gas pipes 5 connected to the common inlet gas duct 21 described above include a near side heating gas pipe 5C connected to the inlet gas duct 21 at a position relatively close to the inlet 211 of the inlet gas duct 21, and a far side heating gas pipe 5D connected to the inlet gas duct 21 at a position farther from the inlet 211 than the near side heating gas pipe 5C, as shown in Fig. 7.
  • the near side heating gas pipe 5C has a shorter distance from the inlet 211 to the heating gas inlet than the far side heating gas pipe 5D.
  • the far side heating gas pipe 5D is disposed at a position farther from the inlet 211 of the inlet gas duct 21 than the near side heating gas pipe 5C in the vertical direction.
  • the far side heating gas pipe 5D is disposed at a position farther from the inlet 211 of the inlet gas duct 21 than the near side heating gas pipe 5C in the horizontal direction.
  • an orifice 81 having an opening area 50C smaller than the opening area 50D of the far-side heating gas pipe 5D is provided in either the near-side heating gas pipe 5C, the connection C1 between the near-side heating gas pipe 5C and the inlet gas duct 21, or the connection C2 between the near-side heating gas pipe 5C and the outlet gas duct 22.
  • the opening area 50C of the near-side heating gas pipe 5C means the minimum area of the flow path of the heating gas flowing through the near-side heating gas pipe 5C from the communication hole 212 of the inlet gas duct 21 to the communication hole 222 of the outlet gas duct 22.
  • the opening area 50D of the far-side heating gas pipe 5D means the minimum area of the flow path of the heating gas flowing through the far-side heating gas pipe 5D from the communication hole 212 of the inlet gas duct 21 to the communication hole 222 of the outlet gas duct 22.
  • the cross-sectional area of the near-side heating gas pipe 5C is the same as the cross-sectional area of the far-side heating gas pipe 5D (within a range of ⁇ 5% of the cross-sectional area of the near-side heating gas pipe 5C).
  • an orifice (restriction) 81 smaller than the cross-sectional areas of the near-side heating gas pipe 5C and the far-side heating gas pipe 5D at the connection C1 between the near-side heating gas pipe 5C and the inlet gas duct 21, the opening area 50C of the near-side heating gas pipe 5C is smaller than the opening area 50D of the far-side heating gas pipe 5D.
  • the orifice 81 is an opening formed in the orifice plate 8.
  • the orifice plate 8 is disposed at the connection C1 between the inlet gas duct 21 and the nearby heated gas pipe 5C such that the orifice 81 closes a portion of the communication hole 212 of the inlet gas duct 21.
  • the orifice plate 8 is disposed in the internal space 210A formed inside the inlet gas duct 21 and is fixed to the inlet gas duct 21 by welding or the like.
  • the opening area of the orifice 81 of the orifice plate 8 is smaller than the flow path cross-sectional area of the nearby heated gas pipe 5C.
  • the orifice 81 increases the pressure loss in the near-side heating gas pipe 5C, making it easier for exhaust gas to be introduced from the inlet gas duct 21 to the far-side heating gas pipe 5D.
  • thermal energy is uniformly transferred from the near-side heating gas pipe 5C and the far-side heating gas pipe 5D to the oxidation catalyst device 3. This allows the entire oxidation catalyst device 3 to be heated uniformly, and shortens the catalyst heating time required for the oxidation catalyst to demonstrate its performance when the oxidation catalyst device 3 begins to be used.
  • the installation manner of the orifice 81 is not limited to the embodiment shown in FIG. 7.
  • the orifice plate 8 may be fixed inside the near-side heated gas pipe 5C.
  • the orifice plate 8 may be disposed in the internal space 220A formed inside the outlet gas duct 22 so that the orifice 81, which is an opening hole, blocks a part of the communication hole 222 of the outlet gas duct 22, and may be fixed to the outlet gas duct 22 by welding or the like.
  • the orifice plate 8 may be disposed between either the inlet gas duct 21 or the outlet gas duct 22 and the near-side heated gas pipe 5C, and may be fixed thereto by welding or the like.
  • an orifice may be provided in at least a portion of the near side heating gas pipe 5C to make the flow path cross-sectional area smaller than the flow path cross-sectional area of the far side heating gas pipe 5D.
  • the flow path cross-sectional area of the near side heating gas pipe 5C may be smaller than the flow path cross-sectional area of the far side heating gas pipe 5D.
  • the communication hole 212 to which the near side heating gas pipe 5C is connected may be smaller than the communication hole 212 to which the far side heating gas pipe 5D is connected, and the communication hole 222 to which the near side heating gas pipe 5C is connected may be smaller than the communication hole 222 to which the far side heating gas pipe 5D is connected.
  • the present disclosure is also applicable to the embodiment shown in FIG. 4.
  • an orifice may be provided that makes the opening area of the heated gas pipe 5 that has a short distance from the inlet 211 to the heated gas inlet smaller than the opening area of the heated gas pipe 5 that has a longer distance from the inlet 211 to the heated gas inlet than the heated gas pipe 5.
  • An oxidation catalyst device temperature increasing method is a method for increasing the temperature of an oxidation catalyst device 3 configured to oxidize exhaust gas discharged from an internal combustion engine 11 of the above-mentioned internal combustion engine system 1.
  • the above-mentioned oxidation catalyst device 3 includes a plurality of oxidation catalyst elements 31 each including a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas.
  • the internal combustion engine 11 includes a dual fuel engine capable of operating by switching between a first fuel FU1 containing methane as an exhaust gas component and a second fuel FU2 not containing methane as an exhaust gas component.
  • the first fuel FU1 for example, liquefied natural gas or the like can be used.
  • the second fuel FU2 for example, fuel oil such as diesel or marine gas oil can be used.
  • the above-mentioned oxidation catalyst device heating method includes a first operating step of introducing a first exhaust gas discharged from the internal combustion engine 11 into a catalyst casing 4 housing an oxidation catalyst device 3 while the internal combustion engine 11 is operating using a first fuel FU1 as fuel, and a second operating step of introducing the first exhaust gas discharged from the internal combustion engine 11 into at least one heating gas pipe 5 disposed inside the catalyst casing 4 and disposed between a pair of adjacently disposed oxidation catalyst elements 31 among the multiple oxidation catalyst elements 31 while the internal combustion engine 11 is operating using a second fuel FU2 as fuel.
  • the first operation step allows the exhaust gas discharged from the internal combustion engine 11 to be introduced into the catalyst casing 4 while the internal combustion engine 11 is operating using the first fuel FU1 as fuel, thereby allowing the methane contained in the exhaust gas to be oxidized by the methane oxidation catalyst.
  • the second operation step allows exhaust gas not containing methane in the exhaust gas components discharged from the internal combustion engine 11 to be introduced into at least one of the heating gas pipes 5 while the internal combustion engine 11 is operating using the second fuel FU2 as fuel.
  • the exhaust gas discharged from the internal combustion engine 11 that does not require oxidation by the oxidation catalyst device 3 can be used as the heating gas for heating the oxidation catalyst device 3, so that there is no need to provide a separate device such as a heater for keeping the oxidation catalyst device 3 warm.
  • This embodiment can reduce the space required by the equipment for heating the oxidation catalyst device 3 and the internal combustion engine system 1, making it suitable for use on ships and other vessels with limited space.
  • the at least one heated gas pipe 5 is disposed between a pair of oxidation catalyst elements 31 disposed adjacent to each other inside the catalyst casing 4, so that the thermal energy of the heated gas flowing through the heated gas pipe 5 can be efficiently transferred to each of the pair of oxidation catalyst elements 31 that sandwich the heated gas pipe 5.
  • This makes it possible to effectively heat the entire oxidation catalyst device 3, and shortens the catalyst heating time required for the oxidation catalyst to demonstrate its performance when the oxidation catalyst device 3 starts to be used.
  • the oxidation catalyst heating system 2 further includes an exhaust gas branch line 23 that branches off from the exhaust gas line 12 upstream of the catalyst casing 4.
  • Each of the above-mentioned multiple heating gas pipes 5 is configured to introduce exhaust gas through the exhaust gas branch line 23.
  • the oxidation catalyst heating system 2 includes the exhaust gas branch line 23 and an exhaust gas return line 24 for returning exhaust gas from each of the plurality of heating gas pipes 5 to the downstream side of the catalyst casing 4 of the exhaust gas line 12.
  • the upstream end of the exhaust gas branch line 23 is connected to the branching portion P1 of the first upstream exhaust gas line 12A, and the downstream end is connected to the inlet 211 of the inlet gas duct 21.
  • the upstream end of the exhaust gas return line 24 is connected to the exhaust outlet 221 of the outlet gas duct, and the downstream end is connected to the junction portion P2 of the first downstream exhaust gas line 12B.
  • the first exhaust gas guided to the plurality of heating gas pipes 5 via the exhaust gas branch line 23 is guided to the downstream side of the catalyst casing 4 of the exhaust gas line 12 via the exhaust gas return line 24.
  • the relatively high-temperature first exhaust gas discharged from the internal combustion engine 11 can be used as the heating gas.
  • the size and complexity of the structure of the oxidation catalyst heating system 2 and the internal combustion engine system 1 equipped with the oxidation catalyst heating system 2 can be suppressed, and the space occupied by the oxidation catalyst heating system 2 and the internal combustion engine system 1 can be reduced.
  • an internal combustion engine system 1 includes an oxidation catalyst warming system 2 including the above-mentioned oxidation catalyst device 3, a catalyst casing 4, and at least one warming gas pipe 5, and a first exhaust gas path switching device 7 configured to be able to switch the path of exhaust gas discharged from the above-mentioned internal combustion engine 11.
  • the above-mentioned oxidation catalyst device 3 includes a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas.
  • the above-mentioned internal combustion engine 11 includes a dual fuel engine capable of operating by switching between a first fuel FU1 containing methane as an exhaust gas component and a second fuel FU2 not containing methane as an exhaust gas component.
  • the first exhaust gas path switching device 7 is configured to guide the first exhaust gas discharged from the internal combustion engine 11 to the catalyst casing 4 while the internal combustion engine 11 is operating using the first fuel FU1 as fuel, and is configured to guide the first exhaust gas discharged from the internal combustion engine 11 to at least one of the above-mentioned heated gas pipes 5 while the internal combustion engine 11 is operating using the second fuel FU2 as fuel.
  • the first exhaust gas path switching device 7 includes a first on-off valve 71 provided downstream of the branch point P1 of the first upstream exhaust gas line 12A, and a second on-off valve 72 provided in the exhaust gas branch line 23.
  • the first exhaust gas path switching device 7 may further include a control device (controller) 70 that controls the opening and closing of the first on-off valve 71 and the second on-off valve 72. Note that in the above-mentioned oxidation catalyst device temperature raising method, the opening and closing of the first on-off valve 71 and the second on-off valve 72 may be changed manually.
  • the first exhaust gas path switching device 7 allows exhaust gas discharged from the internal combustion engine 11 to be introduced into the catalyst casing 4 while the internal combustion engine 11 is operating using the first fuel FU1 as fuel, thereby allowing methane contained in the exhaust gas to be oxidized by the methane oxidation catalyst.
  • the first exhaust gas path switching device 7 allows exhaust gas that does not contain methane in the exhaust gas components discharged from the internal combustion engine 11 to be introduced into at least one heating gas pipe 5 while the internal combustion engine 11 is operating using the second fuel FU2 as fuel.
  • exhaust gas discharged from the internal combustion engine 11 that does not require oxidation by the oxidation catalyst device 3 can be used as heating gas for heating the oxidation catalyst device 3, so that the structure of the oxidation catalyst heating system 2 and the internal combustion engine system 1 including the oxidation catalyst heating system 2 can be prevented from becoming large and complicated, and the space occupied by the oxidation catalyst heating system 2 and the internal combustion engine system 1 can be reduced.
  • An oxidation catalyst device warming method is a method for warming an oxidation catalyst device 3 configured to oxidize exhaust gas discharged from the internal combustion engine 11 of the above-described internal combustion engine system 1.
  • the above-described oxidation catalyst device 3 includes a plurality of oxidation catalyst elements 31, each of which includes a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas.
  • the above-mentioned oxidation catalyst device heating method includes an exhaust gas introduction step of introducing a second exhaust gas, which does not contain methane among the exhaust gas components emitted from an internal combustion engine 13 other than the internal combustion engine 11, into at least one heating gas pipe 5 that is arranged inside a catalyst casing 4 that houses the oxidation catalyst device 3 and is arranged between a pair of adjacently arranged oxidation catalyst elements 31 among the multiple oxidation catalyst elements 31 while the above-mentioned internal combustion engine 11 is stopped.
  • the internal combustion engine 11 and the internal combustion engine 13 include a dual fuel engine that can be operated by switching between a first fuel FU1 that contains methane as an exhaust gas component and a second fuel FU2 that does not contain methane as an exhaust gas component, as shown in FIG. 2.
  • the solid arrows in FIG. 2 indicate the flow of the first exhaust gas and the second exhaust gas when the internal combustion engine 11 and the internal combustion engine 13 are operating using the first fuel FU1 as fuel
  • the dotted arrows in FIG. 2 indicate the flow of the second exhaust gas when the internal combustion engine 11 is stopped and the internal combustion engine 13 is operating using the second fuel FU2 as fuel.
  • the exhaust gas introduction step allows the second exhaust gas, which does not contain methane among the exhaust gas components discharged from the other internal combustion engine 13, to be introduced into the at least one heating gas pipe 5 while the internal combustion engine 11 is stopped.
  • the exhaust gas discharged from the other internal combustion engine 13 and which does not require oxidation by the oxidation catalyst device 3 can be used as the heating gas for heating the oxidation catalyst device 3, so that the size and complexity of the device for heating the oxidation catalyst device 3 and the structure of the internal combustion engine system 1 including the device can be suppressed, and the space occupied by the device and the internal combustion engine system 1 can be reduced.
  • the present embodiment can reduce the space occupied by the device for heating the oxidation catalyst device 3 and the internal combustion engine system 1, it is suitable for use in ships and the like with limited space.
  • exhaust gas can be introduced into the at least one heating gas pipe 5, and the oxidation catalyst device 3 can be heated by the exhaust gas flowing through the heating gas pipe 5.
  • the at least one heated gas pipe 5 is disposed between a pair of oxidation catalyst elements 31 disposed adjacent to each other inside the catalyst casing 4, so that the thermal energy of the heated gas flowing through the heated gas pipe 5 can be efficiently transferred to each of the pair of oxidation catalyst elements 31 that sandwich the heated gas pipe 5.
  • This makes it possible to effectively heat the entire oxidation catalyst device 3, and shortens the catalyst heating time required for the oxidation catalyst to demonstrate its performance when the oxidation catalyst device 3 starts to be used.
  • the oxidation catalyst heating system 2 further includes another exhaust gas line 14A, 27 different from the exhaust gas line 12 through which the second exhaust gas discharged from the second internal combustion engine 13 flows.
  • Each of the multiple heating gas pipes 5 described above is configured so that exhaust gas is introduced through the other exhaust gas line 14A, 27 described above.
  • the oxidation catalyst heating system 2 further includes an oxidation catalyst device 3A, a catalyst casing 4A, a plurality of heating gas pipes 5E, an inlet gas duct 21C attached to the catalyst casing 4A, and an outlet gas duct 22C attached to the catalyst casing 4A.
  • the oxidation catalyst device 3A, the catalyst casing 4A, the heating gas pipe 5E, the inlet gas duct 21C, and the outlet gas duct 22C may have the same structure as the oxidation catalyst device 3, the catalyst casing 4, the heating gas pipe 5, the inlet gas duct 21, and the outlet gas duct 22 described above.
  • the catalyst casing 4A is provided in the second exhaust gas line 14, and is adapted to accommodate the oxidation catalyst device 3A and the plurality of heating gas pipes 5E.
  • the second exhaust gas line 14 includes a second upstream exhaust gas line 14A for guiding the second exhaust gas from the internal combustion engine 13 to the catalyst casing 4A, and a second downstream exhaust gas line 14B for guiding the second exhaust gas from the catalyst casing 4A to the downstream side in the flow direction of the second exhaust gas.
  • the oxidation catalyst heating system 2 includes a first exhaust gas branch line 25 that branches off from the upstream side of the catalyst casing 4A of the second exhaust gas line 14 and directs the second exhaust gas to a plurality of heating gas pipes 5E, and a first exhaust gas return line 26 that returns the exhaust gas from each of the plurality of heating gas pipes 5E to the downstream side of the catalyst casing 4A of the exhaust gas line 14.
  • the first exhaust gas branch line 25 has an upstream end connected to the branch point P3 of the second upstream exhaust gas line 14A, and a downstream end connected to the inlet gas duct 21C.
  • the first exhaust gas return line 26 has an upstream end connected to the outlet gas duct 22C, and a downstream end connected to the junction P4 of the second downstream exhaust gas line 14B.
  • the second exhaust gas that is guided to the multiple heated gas pipes 5E via the first exhaust gas branch line 25 is guided downstream of the catalyst casing 4A of the exhaust gas line 14 via the first exhaust gas return line 26.
  • the oxidation catalyst heating system 2 includes a second exhaust gas branch line 27 that branches off from the first exhaust gas branch line 25 and guides the second exhaust gas to the multiple heating gas pipes 5, and a second exhaust gas return line 28 that returns the exhaust gas from each of the multiple heating gas pipes 5E to the downstream side of the catalyst casing 4A of the exhaust gas line 14.
  • the upstream end of the second exhaust gas branch line 27 is connected to the branch point P5 of the first exhaust gas branch line 25, and the downstream end is connected to the inlet gas duct 21.
  • the upstream end of the second exhaust gas return line 28 is connected to the outlet gas duct 22, and the downstream end is connected to the junction point P6 of the second downstream exhaust gas line 14B.
  • the second exhaust gas guided to the multiple heating gas pipes 5 via the second exhaust gas branch line 27 is guided downstream of the catalyst casing 4A of the exhaust gas line 14 via the second exhaust gas return line 28.
  • the above configuration allows the use of the relatively high-temperature second exhaust gas discharged from the second internal combustion engine 13 as the heating gas.
  • the structure of the oxidation catalyst heating system 2 and the internal combustion engine system 1 equipped with the oxidation catalyst heating system 2 can be prevented from becoming large and complicated, and the space occupied by the oxidation catalyst heating system 2 and the internal combustion engine system 1 can be reduced.
  • the above configuration allows the second exhaust gas to be introduced into at least one heating gas pipe 5 even when the internal combustion engine 11 is not operating, and the oxidation catalyst device 3 can be heated by the second exhaust gas flowing through the heating gas pipe 5.
  • the oxidation catalyst heating system 2 may include a second exhaust gas branch line whose upstream end is connected upstream of the junction P4 and the junction P6 of the second downstream exhaust gas line 14B and whose downstream end is connected to the inlet gas duct 21, instead of the second exhaust gas branch line 27 described above.
  • the exhaust gas containing methane in the exhaust gas components discharged from the second internal combustion engine 13 can be oxidized by the oxidation catalyst device 3 and then introduced into the at least one heating gas pipe 5.
  • the exhaust gas after the oxidation process from the other internal combustion engine (the second internal combustion engine 13) can be used as a warming gas.
  • the exhaust gas after the oxidation process from the second internal combustion engine 13 can be used as a warming gas.
  • an internal combustion engine system 1 includes an oxidation catalyst heating system 2 including the above-mentioned oxidation catalyst device 3, 3A, catalyst casing 4, 4A, and heating gas pipe 5, 5E, and a second exhaust gas path switching device 7A configured to be able to switch the path of the second exhaust gas discharged from the above-mentioned internal combustion engine 13.
  • the above-mentioned oxidation catalyst device 3 includes a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas.
  • the above-mentioned internal combustion engine 13 includes a dual fuel engine that can be operated by switching between a first fuel FU1 containing methane as an exhaust gas component and a second fuel FU2 not containing methane as an exhaust gas component.
  • the second exhaust gas path switching device 7A is configured to guide the second exhaust gas to the catalyst casing 4A while the internal combustion engine 13 is operating using the first fuel FU1 as fuel, and is configured to guide the second exhaust gas to the heated gas pipes 5, 5E while the internal combustion engine 11 is stopped and the internal combustion engine 13 is operating using the second fuel FU2 as fuel.
  • the second exhaust gas path switching device 7A includes a first on-off valve 71A provided downstream of the branch point P3 of the second upstream exhaust gas line 14A, and a second on-off valve 72A provided upstream of the branch point P5 of the first exhaust gas branch line 25.
  • the second exhaust gas path switching device 7A may further include a control device (controller) 70A that controls the opening and closing of the first on-off valve 71A and the second on-off valve 72A.
  • the opening and closing of the first on-off valve 71A and the second on-off valve 72A may be changed manually.
  • the second exhaust gas path switching device 7A allows exhaust gas that does not contain methane among the exhaust gas components emitted from the other internal combustion engine 13 to be introduced into the at least one heating gas pipe 5 while the other internal combustion engine 13 is operating using the second fuel FU2 as fuel.
  • exhaust gas that does not require oxidation by the oxidation catalyst device 3 and is emitted from the other internal combustion engine 13 can be used as heating gas for heating the oxidation catalyst device 3, so that the structure of the oxidation catalyst heating system 2 and the internal combustion engine system 1 equipped with the oxidation catalyst heating system 2 can be prevented from becoming large and complicated, and the space occupied by the oxidation catalyst heating system 2 and the internal combustion engine system 1 can be reduced.
  • expressions expressing relative or absolute configuration do not only strictly represent such a configuration, but also represent a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained.
  • expressions indicating that things are in an equal state such as “identical,””equal,” and “homogeneous,” not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained.
  • expressions describing shapes such as a rectangular shape or a cylindrical shape do not only refer to shapes such as a rectangular shape or a cylindrical shape in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained.
  • the expressions "comprise,””include,” or “have” a certain element are not exclusive expressions that exclude the presence of other elements.
  • An oxidation catalyst heating system (2) according to at least one embodiment of the present disclosure, an exhaust gas line (12) through which exhaust gas discharged from an internal combustion engine (11) flows; a catalyst casing (4) that houses an oxidation catalyst device (3) that includes a plurality of oxidation catalyst elements (31) that are provided in the exhaust gas line (12) and configured to oxidize the exhaust gas; and at least one heated gas pipe (5) through which a heated gas flows for heating the oxidation catalyst device (3), the at least one heated gas pipe (5) being disposed inside the catalyst casing (4) and between a pair of adjacently disposed oxidation catalyst elements (31) among the plurality of oxidation catalyst elements (31).
  • the above configuration 1) allows the oxidation catalyst device (3) to be heated by the heating gas flowing through the at least one heating gas pipe (5) while the oxidation catalyst device (3) is not in use.
  • the at least one heating gas pipe (5) is disposed between a pair of oxidation catalyst elements (31) disposed adjacent to each other inside the catalyst casing (4), so that the thermal energy of the heating gas flowing through the heating gas pipe (5) can be efficiently transferred to each of the pair of oxidation catalyst elements (31) sandwiching the heating gas pipe (5). This allows the entire oxidation catalyst device (3) to be effectively heated, and shortens the catalyst heating time required for the oxidation catalyst to demonstrate its performance when the oxidation catalyst device (3) begins to be used.
  • the at least one heated gas pipe (5) extends in a direction intersecting a flow direction (first direction RD1) of the exhaust gas flowing inside the catalyst casing (4).
  • the at least one heated gas pipe (5) extends in a direction intersecting the flow direction (first direction RD1) of the exhaust gas flowing inside the catalyst casing (4), so that the thermal energy of the heated gas flowing through the heated gas pipe (5) can be efficiently transmitted throughout the entire oxidation catalyst device (3) arranged inside the catalyst casing (4). This allows the temperature of the oxidation catalyst device (3) to be effectively increased.
  • the oxidation catalyst heating system (2) described in 2) above The at least one heated gas pipe (5)
  • the cross-sectional shape is formed in a rectangular shape having a pair of long sides and a pair of short sides, A pair of long side portions (51, 52) having the long sides of the warm-up gas pipe (5) are in contact with the pair of oxidation catalyst elements (31), respectively.
  • each of a pair of long sides (51, 52) having a relatively large area of the at least one heated gas pipe (5) abuts against an oxidation catalyst element (31).
  • the thermal energy of the heated gas flowing through the heated gas pipe (5) can be directly and efficiently transferred to each of the oxidation catalyst elements (31) facing the pair of long sides (51, 52) via the pair of long sides (51, 52) having a large heat transfer area. This allows the oxidation catalyst device (3) to be effectively heated.
  • the oxidation catalyst heating system (2) described in 3) above The at least one heated gas pipe (5)
  • the heating gas pipes (5) are arranged at intervals in a direction intersecting an extension direction of the heating gas pipes (5)
  • the oxidation catalyst temperature increasing system (2) has The heating gas pipe (5) is disposed adjacent to one another in a direction intersecting the extending direction of the heating gas pipe (5), and the heating gas pipe (5) is connected at one end to one of the pair of heating gas pipes (5) and at the other end to the other heating gas pipe, the heating gas pipe (5) being disposed at intervals in the extending direction of the heating gas pipe (5);
  • Each of the plurality of oxidation catalyst elements (31) is accommodated in a space partitioned by the pair of heated gas pipes (5) and the plurality of partition plates (6).
  • the above configuration 4) allows the oxidation catalyst element (31) to be accommodated in each of the spaces partitioned by the pair of heated gas pipes (5) and the multiple partition plates (6), making it easy to position the oxidation catalyst element (31).
  • the thermal energy of the heated gas flowing through the pair of heated gas pipes (5) is transferred to the oxidation catalyst element (31) accommodated in the space via the pair of heated gas pipes (5) and the multiple partition plates (6) that surround the oxidation catalyst element (31). This allows the temperature to be effectively increased throughout the entire oxidation catalyst element (31) accommodated in the space.
  • the oxidation catalyst heating system (2) according to any one of 1) to 3) above, an exhaust gas branch line (23) branching off from the exhaust gas line (12) on an upstream side of the catalyst casing (4);
  • the at least one warm-up gas pipe (5) is configured so that the exhaust gas is introduced via the exhaust gas branch line (23).
  • the relatively high-temperature exhaust gas discharged from the internal combustion engine (11) can be used as the heating gas.
  • the size and complexity of the structure of the oxidation catalyst heating system (2) and the internal combustion engine system (1) equipped with the oxidation catalyst heating system (2) can be suppressed, and the space occupied by the oxidation catalyst heating system (2) and the internal combustion engine system (1) can be reduced.
  • the oxidation catalyst heating system (2) according to any one of 1) to 3) above,
  • the engine (11) further includes an exhaust gas line (14A, 27) different from the exhaust gas line (12) through which exhaust gas discharged from an internal combustion engine (13) different from the internal combustion engine (11) flows,
  • the at least one warm-up gas pipe (5) is configured so that the exhaust gas is introduced via the other exhaust gas line (14A, 27).
  • a relatively high-temperature exhaust gas discharged from another internal combustion engine (13) can be used as the heating gas.
  • the size and complexity of the structure of the oxidation catalyst heating system (2) and the internal combustion engine system (1) equipped with the oxidation catalyst heating system (2) can be suppressed, and the space occupied by the oxidation catalyst heating system (2) and the internal combustion engine system (1) can be reduced.
  • exhaust gas can be introduced into at least one heating gas pipe (5), and the oxidation catalyst device (3) can be heated by the exhaust gas flowing through the heating gas pipe (5).
  • the oxidation catalyst heating system (2) according to any one of 2) to 4) above,
  • the at least one heated gas pipe (5) At least one first heated gas pipe (5A) through which the heated gas flows from one side to the other side in the extending direction of the heated gas pipe (5); and at least one second heated gas pipe (5B) through which the heated gas flows from the other side to the one side in the extending direction of the heated gas pipe (5).
  • the at least one heated gas pipe (5) includes a plurality of heated gas pipes (5) each having a heated gas inlet for introducing the heated gas from the outside into the heated gas pipe (5) connected to a common inlet gas duct (21).
  • the difference in temperature and flow rate of the exhaust gas introduced from the inlet gas duct (21) to the multiple heated gas pipes (5) can be made small.
  • thermal energy is uniformly transferred from the heated gas flowing through the multiple heated gas pipes (5) to the oxidation catalyst device (3). This allows the entire oxidation catalyst device (3) to be heated uniformly, and the catalyst heating time required for the oxidation catalyst to demonstrate its performance when the oxidation catalyst device (3) begins to be used can be shortened.
  • the inlet gas duct (21) has an inlet (211) for introducing the warm-up gas into the inlet gas duct (21),
  • the plurality of heated gas pipes (5) connected to the inlet gas duct (21) are Near-side heating gas piping (5C); a remote-side heating gas pipe (5D) connected to the inlet gas duct (21) at a position farther from the inlet (211) than the nearby-side heating gas pipe (5C),
  • An orifice (81) having an opening area smaller than the opening area of the far-side heating gas pipe (5D) is provided in either the near-side heating gas pipe (5C), the connection part (C1) between the near-side heating gas pipe (5C) and the inlet gas duct (21), or the connection part (C2) between the near-side heating gas pipe (5C) and the outlet gas duct (22).
  • the orifice (81) increases the pressure loss in the near-side heating gas pipe (5C), making it easier for exhaust gas to be introduced from the inlet gas duct (21) to the far-side heating gas pipe (5D).
  • thermal energy is uniformly transferred from the near-side heating gas pipe (5C) and the far-side heating gas pipe (5D) to the oxidation catalyst device (3). This allows the entire oxidation catalyst device (3) to be heated uniformly, and shortens the catalyst heating time required for the oxidation catalyst to perform its functions when the oxidation catalyst device (3) begins to be used.
  • the oxidation catalyst heating system (2) according to any one of 1) to 9) above,
  • the oxidation catalyst device (3) includes a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas.
  • the methane oxidation catalyst in order to make the methane oxidation catalyst perform its function, it is necessary to keep the methane oxidation catalyst (oxidation catalyst device 3) at a relatively high temperature, but the temperature of the methane oxidation catalyst can be raised by the heating gas flowing through at least one heating gas pipe (5). This makes it possible to shorten the catalyst heating time required for the methane oxidation catalyst to perform its function when the oxidation catalyst device (3) starts to be used.
  • At least one embodiment of the internal combustion engine system (1) includes: The oxidation catalyst heating system (2) according to 5) above, The internal combustion engine (11); An internal combustion engine system (1) including: a first exhaust gas path switching device (7) configured to be capable of switching a path of the exhaust gas discharged from the internal combustion engine (11),
  • the oxidation catalyst device (3) includes a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas
  • the internal combustion engine (11) includes a dual fuel engine capable of switching between a first fuel (FU1) containing methane as an exhaust gas component and a second fuel (FU2) not containing methane as an exhaust gas component
  • the first exhaust gas path switching device (7) comprises: The exhaust gas discharged from the internal combustion engine (11) while the internal combustion engine (11) is operating using the first fuel (FU1) as fuel is guided to the catalyst casing (4), and the exhaust gas discharged from the internal combustion engine (11) while the internal combustion engine (11) is operating using the second fuel (FU2) as fuel is guided to the at least one
  • the first exhaust gas path switching device (7) allows exhaust gas discharged from the internal combustion engine (11) to be introduced into the catalyst casing (4) while the internal combustion engine (11) is operating using the first fuel (FU1) as fuel, thereby allowing methane contained in the exhaust gas to be oxidized by the methane oxidation catalyst.
  • the first exhaust gas path switching device (7) allows exhaust gas that does not contain methane as an exhaust gas component discharged from the internal combustion engine (11) to be introduced into the at least one heated gas pipe (5) while the internal combustion engine (11) is operating using the second fuel (FU2).
  • exhaust gas discharged from the internal combustion engine (11) that does not require oxidation by the oxidation catalyst device (3) can be used as the heating gas for heating the oxidation catalyst device (3), so the structure of the oxidation catalyst heating system (2) and the internal combustion engine system (1) equipped with the oxidation catalyst heating system (2) can be prevented from becoming large and complicated, and the space occupied by the oxidation catalyst heating system (2) and the internal combustion engine system (1) can be reduced.
  • At least one embodiment of the internal combustion engine system (1) includes: The oxidation catalyst heating system (2) according to 6) above, The internal combustion engine (11); The other internal combustion engine (13); a second exhaust gas path switching device (7A) configured to be capable of switching a path of the exhaust gas discharged from the other internal combustion engine (13),
  • the other internal combustion engine (13) includes a dual fuel engine capable of switching between a first fuel (FU1) containing methane as an exhaust gas component and a second fuel (FU2) not containing methane as an exhaust gas component,
  • the second exhaust gas path switching device (7A) comprises: The exhaust gas discharged from the other internal combustion engine (13) is guided to the at least one heated gas pipe (5) while the other internal combustion engine (13) is operating using the second fuel (FU2) as fuel.
  • the second exhaust gas path switching device (7A) allows exhaust gas that does not contain methane as an exhaust gas component discharged from the other internal combustion engine (13) to be introduced into the at least one heating gas pipe (5) while the other internal combustion engine (13) is operating using the second fuel (FU2) as fuel.
  • exhaust gas that does not require oxidation by the oxidation catalyst device (3) and is discharged from the other internal combustion engine (13) can be used as heating gas for heating the oxidation catalyst device (3), so that the structure of the oxidation catalyst heating system (2) and the internal combustion engine system (1) equipped with the oxidation catalyst heating system (2) can be prevented from becoming large and complicated, and the space occupied by the oxidation catalyst heating system (2) and the internal combustion engine system (1) can be reduced.
  • a method for increasing the temperature of an oxidation catalyst device configured to oxidize exhaust gas discharged from an internal combustion engine (11), comprising:
  • the oxidation catalyst device (3) includes a plurality of oxidation catalyst elements (31) each including a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas;
  • the internal combustion engine (11) includes a dual fuel engine capable of switching between a first fuel (FU1) containing methane as an exhaust gas component and a second fuel (FU2) not containing methane as an exhaust gas component,
  • the oxidation catalyst device temperature increasing method includes the steps of: a first operating step of introducing the exhaust gas discharged from the internal combustion engine (11) into a catalyst casing (4) that houses the oxidation catalyst device (3) while the internal combustion engine (11) is operating using the first fuel (FU1) as fuel; and a second operating step of introducing the exhaust gas discharged from the internal combustion engine (11) into at least one heated
  • the first operation step allows exhaust gas discharged from the internal combustion engine (11) to be introduced into the catalyst casing (4) while the internal combustion engine (11) is operating using the first fuel (FU1) as fuel, thereby allowing methane contained in the exhaust gas to be oxidized by the methane oxidation catalyst.
  • the second operation step allows exhaust gas not containing methane in the exhaust gas components discharged from the internal combustion engine (11) to be introduced into the at least one heating gas pipe (5) while the internal combustion engine (11) is operating using the second fuel (FU2) as fuel.
  • the exhaust gas discharged from the internal combustion engine (11) that does not require oxidation by the oxidation catalyst device (3) can be used as a heating gas for heating the oxidation catalyst device (3), so that the size and complexity of the device for heating the oxidation catalyst device (3) and the structure of the internal combustion engine system (1) equipped with the device can be suppressed, and the space occupied by the device and the internal combustion engine system (1) can be reduced.
  • the at least one heated gas pipe (5) is disposed between a pair of oxidation catalyst elements (31) disposed adjacent to each other inside the catalyst casing (4), so that the thermal energy of the heated gas flowing through the heated gas pipe (5) can be efficiently transferred to each of the pair of oxidation catalyst elements (31) sandwiching the heated gas pipe (5).
  • This makes it possible to effectively heat the entire oxidation catalyst device (3), and shortens the catalyst heating time required for the oxidation catalyst to demonstrate its performance when the oxidation catalyst device (3) begins to be used.
  • a method for increasing the temperature of an oxidation catalyst device configured to oxidize exhaust gas discharged from an internal combustion engine (11), comprising:
  • the oxidation catalyst device (3) includes a plurality of oxidation catalyst elements (31) each including a methane oxidation catalyst configured to oxidize methane contained in the exhaust gas;
  • the oxidation catalyst device temperature increasing method includes the steps of:
  • the method further includes an exhaust gas introduction step for introducing exhaust gas that does not contain methane among exhaust gas components discharged from an internal combustion engine (13) other than the internal combustion engine (11) into at least one heated gas pipe (5) that is disposed inside a catalyst casing (4) that houses the oxidation catalyst device (3) and is disposed between a pair of adjacently disposed oxidation catalyst elements (31) among the plurality of oxidation catalyst elements (31) while the internal combustion engine (11) is stopped.
  • exhaust gas that does not contain methane among the exhaust gas components discharged from the other internal combustion engine (13) can be introduced into the at least one heating gas pipe (5) while the internal combustion engine (11) is stopped.
  • exhaust gas that does not require oxidation by the oxidation catalyst device (3) discharged from the other internal combustion engine (13) can be used as a heating gas for heating the oxidation catalyst device (3), so that the size and complexity of the device for heating the oxidation catalyst device (3) and the internal combustion engine system (1) equipped with the device can be suppressed, and the space occupied by the device and the internal combustion engine system (1) can be reduced.
  • exhaust gas can be introduced into the at least one heating gas pipe (5), and the oxidation catalyst device (3) can be heated by the exhaust gas flowing through the heating gas pipe (5).
  • the at least one heated gas pipe (5) is disposed between a pair of oxidation catalyst elements (31) disposed adjacent to each other inside the catalyst casing (4), so that the thermal energy of the heated gas flowing through the heated gas pipe (5) can be efficiently transferred to each of the pair of oxidation catalyst elements (31) sandwiching the heated gas pipe (5).
  • This makes it possible to effectively heat the entire oxidation catalyst device (3), and shortens the catalyst heating time required for the oxidation catalyst to demonstrate its performance when the oxidation catalyst device (3) starts to be used.

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PCT/JP2024/001879 2023-04-12 2024-01-23 酸化触媒昇温システム、内燃機関システム及び酸化触媒装置昇温方法 WO2024214360A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004108311A (ja) * 2002-09-20 2004-04-08 Aisin Takaoka Ltd エンジンの排気ガス浄化装置
KR20140112153A (ko) * 2013-03-13 2014-09-23 대우조선해양 주식회사 배기가스 배출 시스템 및 그 설치 방법
JP2015214970A (ja) * 2014-05-09 2015-12-03 ヴィンタートゥール ガス アンド ディーゼル アーゲー 往復動ピストン内燃機関、排気ガス処理部及び往復動ピストン内燃機関の運転方法
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6162383B2 (ja) 2012-10-09 2017-07-12 ヤンマー株式会社 排気ガス浄化装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004108311A (ja) * 2002-09-20 2004-04-08 Aisin Takaoka Ltd エンジンの排気ガス浄化装置
KR20140112153A (ko) * 2013-03-13 2014-09-23 대우조선해양 주식회사 배기가스 배출 시스템 및 그 설치 방법
JP2015214970A (ja) * 2014-05-09 2015-12-03 ヴィンタートゥール ガス アンド ディーゼル アーゲー 往復動ピストン内燃機関、排気ガス処理部及び往復動ピストン内燃機関の運転方法
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

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