DK181545B1 - A large two-stroke uniflow scavenged turbocharged internal combustion engine configured for reducing ammonia slip and a method for reducing ammonia slip of such an engine - Google Patents
A large two-stroke uniflow scavenged turbocharged internal combustion engine configured for reducing ammonia slip and a method for reducing ammonia slip of such an engine Download PDFInfo
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- DK181545B1 DK181545B1 DKPA202270475A DKPA202270475A DK181545B1 DK 181545 B1 DK181545 B1 DK 181545B1 DK PA202270475 A DKPA202270475 A DK PA202270475A DK PA202270475 A DKPA202270475 A DK PA202270475A DK 181545 B1 DK181545 B1 DK 181545B1
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- nox
- ammonia
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- exhaust gas
- gas
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 374
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 131
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000446 fuel Substances 0.000 claims abstract description 72
- 229910000069 nitrogen hydride Inorganic materials 0.000 claims abstract description 55
- 239000003054 catalyst Substances 0.000 claims description 75
- 238000011144 upstream manufacturing Methods 0.000 claims description 21
- 230000003647 oxidation Effects 0.000 claims description 17
- 238000007254 oxidation reaction Methods 0.000 claims description 17
- 230000002000 scavenging effect Effects 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000007086 side reaction Methods 0.000 claims description 2
- 239000010457 zeolite Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 137
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 11
- 150000002430 hydrocarbons Chemical class 0.000 description 10
- 229930195733 hydrocarbon Natural products 0.000 description 9
- 239000004215 Carbon black (E152) Substances 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 6
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 4
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000000295 fuel oil Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000001272 nitrous oxide Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- LSQZJLSUYDQPKJ-NJBDSQKTSA-N amoxicillin Chemical compound C1([C@@H](N)C(=O)N[C@H]2[C@H]3SC([C@@H](N3C2=O)C(O)=O)(C)C)=CC=C(O)C=C1 LSQZJLSUYDQPKJ-NJBDSQKTSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0644—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being hydrogen, ammonia or carbon monoxide
-
- 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 ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
- F02B25/04—Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0206—Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
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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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1616—NH3-slip from catalyst
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Exhaust Gas After Treatment (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Claims (21)
1. Stor, turboladet, totaktsforbrændingsmotor med længdeskylning, der har mindst én driftsmodus, hvori hovedbrændstoffet er ammoniak, hvilken motor omfatter: - mindst én cylinder med en cylinderforing (1) og et frem- og tilbagegående stempel (10) deri og et cylinderdæksel (22), der dækker cylinderen, - et forbrændingskammer, der er dannet inde i cylinderen (1) mellem det frem- og tilbagegående stempel (10) og cylinderdækslet (22), - et indsugningssystem til tilførsel af skylleluft til forbrændingskammeret, - et udstødningssystem til udstødning af en strøm af udstødningsgas genereret ved forbrænding af ammoniak 1 forbrændingskammeret, - et turboladningssystem (5), der omfatter mindst én kompressor (7) 1 indsugningssystemet til komprimering af skylleluft og mindst én udstødningsgasdreven turbine (6) i udstødningssystemet til drift af kompressoren (7), - en SCR-katalysator (40) i udstødningssystemet, fortrinsvis opstrøms for den udstødningsgasdrevne turbine (6), kendetegnet ved - et middel til at tilsætte en gasstrøm indeholdende NOx til strømmen af udstødningsgas i eller opstrøms for SCR- katalysatoren (40).
2. Motor ifølge krav 1, der omfatter en styreenhed (50) konfigureret til at styre størrelsen på strømmen af gas indeholdende NOx tilsat strømmen af udstødningsgas.
DK 181545 B1 28
3. Motor ifølge krav 2, der omfatter et middel til at måle og/eller estimere molforholdet mellem ammoniak og NOx i strømmen af udstødningsgas.
4. Motor ifølge krav 3, hvor styreenheden (50) er konfigureret til at justere størrelsen på strømmen af gas indeholdende NOx som en funktion af målt og/eller estimeret molforhold mellem ammoniak og NOx i strømmen af udstødningsgas.
5. Motor ifølge krav 4, hvor styreenheden (50) er konfigureret til at justere størrelsen på NOx-strømmen til en størrrelse, der resulterer 1, at strømmen af udstødningsgas, der trænger ind i SCR-katalysatoren (40), har et molforhold mellem ammoniak og NOx på eller under 1, fortrinsvis lidt under 1,
dvs. en molkoncentration af ammoniak, der er på eller under molkoncentrationen af NOx, fortrinsvis lidt under.
6. Motor ifølge et hvilket som helst af kravene 1 til 5, hvor strømmen af NOx-holdig gas omfatter NOx-komponenterne NO og NO2, og hvor motoren omfatter midler til dåjustering af forholdet mellem NO og NO2 1 gasstrømmen omfattende NOx.
7. Motor ifølge et hvilket som helst af kravene 2 til 6, og som omfatter et sensorsystem (44, 45, 46, 47, 48, 49), der tilvejebringer ét eller flere signaler, som gør det muligt for styreenheden (50) at bestemme molforholdet mellem ammoniak og NOx i strømmen af udstødningsgas.
8. Motor ifølge et hvilket som helst af kravene 1 til 7, og som omfatter et NOx-genereringssystem til generering af gasstrømmen indeholdende NOx, hvilket NOx-genereringssystem
DK 181545 B1 29 fortrinsvis omfatter en kilde til tilvejebringelse af en strom af NH3, der, fortrinsvis katalytisk, oxideres til NO, NO2 og H20 for at opnå gasstrømmen indeholdende NOx.
9. Motor ifølge krav 8, og som omfatter en oxideringskatalysator (43), fortrinsvis en platin- rhodiumkatalysator, fortrinsvis omfattende en tilførsel af gasformig ammoniak under tryk og en tilførsel af trykluft til oxideringskatalysatoren (43), hvor trykluftkilden fortrinsvis er skylleluft fra indsugningssystemet.
10. Motor ifølge krav 8 eller 9, hvor NOx-genereringssystemet er konfigureret til at styre forholdet mellem NO og NO2 i gassen omfattende NOx.
11. Motor ifølge krav 8, 9 eller 10, hvor styreenheden (50) er konfigureret til at bestemme det optimale forhold mellem NO og NO2 i gassen omfattende NOx og konfigureret til at justere forholdet mellem NO og NO2 i gassen omfattende NOx i overensstemmelse hermed.
12. Motor ifølge et hvilket som helst af kravene 8 til 11, og som nedstrøms for NOx-genereringssystemet omfatter et katalytisk N20-reduktionssystem, fortrinsvis en jernzeolitkatalysator, til fjernelse af N20, der kan frembringes som resultat af en sidereaktion inde 1 NOx- genereringsenheden.
13. Motor ifølge et hvilket som helst af kravene 1 til 12, og som omfatter en beholder til oplagring af gassen indeholdende NOx, fortrinsvis til oplagring af gas indeholdende NOx under
DK 181545 B1 30 højt tryk, hvilken beholder fortrinsvis er forbundet med udstødningsgassystemet via en styreventil for derved at muliggøre en styret strøm af gassen indeholdende NOx fra beholderen ind 1 strømmen af udstødningsgas.
14. Motor ifølge et hvilket som helst af kravene 1 til 13, og som omfatter mindst én NOx-sensor (44, 46, 48), der er konfigureret tl at tilvejebringe et signal, der er repræsentativt for en NOx-koncentration af strømmen af udstødningsgas i udstødningssystemet, og mindst én ammoniaksensor (45, 47, 49), der er konfigureret til at tilvejebringe et signal, der er repræsentativt for en ammoniakkoncentration i strømmen af udstødningsgas i udstødningssystemet,
15. Motor ifølge et hvilket som helst af kravene 1 til 14, hvor den mindst ene NOx-sensor (44) er konfigureret til at tilvejebringe et signal, der er repræsentativt for en NOx- koncentration af strømmen af udstødningsgas i udstødningssystemet opstrøms for en position, hvor strømmen af gas indeholdende NOx tilsættes, og/eller hvor den mindst ene NOx-sensor (46) er konfigureret til at tilvejebringe et signal, der er repræsentativt for en NOx- koncentration af strømmen af udstødningsgas i udstødningssystemet nedstrøms for en position, hvor strømmen af gas indeholdende NOx tilsættes og opstrøms for SCR- katalysatoren (40), og/eller hvor den mindst ene NOx-sensor (48) er konfigureret til at tilvejebringe et signal, der er repræsentativt for en NOx- koncentration af strømmen af udstødningsgas i
DK 181545 B1 31 udstødningssystemet nedstrøms for SCR-katalysatoren (40), og/eller hvor den mindst ene ammoniaksensor (45) er konfigureret til at tilvejebringe et signal, der er repræsentativt for en ammoniakkoncentration af strømmen af udstødningsgas i udstødningssystemet opstrøms for en position, hvor strømmen af gas indeholdende NOx tilsættes, og/eller hvor den mindst ene ammoniaksensor (47) er konfigureret til at tilvejebringe et signal, der er repræsentativt for en ammoniakkoncentration af udstødningsgassen i udstødningssystemet nedstrøms for en position, hvor strømmen af gas indeholdende NOx tilsættes og opstrøms for SCR- katalysatoren (40), og/eller hvor den mindst ene ammoniaksensor (49) er konfigureret til at tilvejebringe et signal, der er repræsentativt for en ammoniakkoncentration af strømmen af udstødningsgas i udstødningssystemet nedstrøms for SCR-katalysatoren (40).
16. Motor ifølge et hvilket som helst af kravene 1 til 15, og som omfatter et ammoniakbrændstofsystem (30), der er konfigureret til tilførsel af ammoniak under tryk til brændstofsventiler (50, 507), som er konfigureret til at injicere ammoniak i eller lade ammoniak tilføre forbrændingskammeret.
17. Fremgangsmåde til reduktion af ammoniakslip fra en stor, turboladet, totaktsforbrændingsmotor med længdeskylning, hvilken fremgangsmåde omfatter: - a) drift af motoren med ammoniak som hovedbrændstof, hvorved der frembringes en strøm af udstødningsgas indeholdende NOx og NH3,
DK 181545 B1 32 - b) justering af forholdet mellem ammoniak og NOx i strømmen af udstødningsgas ved tilsætning af en styret strøm af NOx til udstødningsgassen og - c) efterfølgende udsættelse af strømmmen af udstødningsgas for SCR.
18. Fremgangsmåde ifølge krav 17, og som omfatter bestemmelse af molforholdet mellem ammoniak og NOx før tilsætning til den styrede strøm af NOx til strømmen af udstødningsgas, og tilsætning af den styrede strøm af NOx til strømmen af udstødningsgas, når, og fortrinsvis kun når, molforholdet er på eller over 1.
19. Fremgangsmåde ifølge krav 18, og som omfatter bestemmelse af størrelsen af den NOx-strøm, der kræves for at sænke det bestemte molforhold til et niveau under 1, fortrinsvis lidt under 1, og justering af størrelsen på strømmen af gas indeholdende NOx til den bestemte størrelse.
20. Fremgangsmåde ifølge krav 19, og som omfatter bestemmelse af et ønsket forhold mellem NO og NO2 i strømmen af gas indeholdende NOx og justering af forholdet mellem NN og NO2 i strømmen af gas indeholdende NOx.
21. Fremgangsmåde ifølge et hvilket som helst af kravene 17 til 20, og som omfatter tilførsel af en strøm af gasformig ammoniak under tryk og en strøm af trykluft til et indløb i en oxideringskatalysator (43) for at frembringe en en gasstrøm indeholdende NOx, der strømmer ud ad et udløb i oxideringskatalysatoren (43), hvilken strøm af trykluft fortrinsvis stammer fra indsugningssystemet, der fortrinsvis
DK 181545 B1 33 stammer fra indsugningssystemet ved en position nedstrøms for en kompressor (7) 1 turboladeren (5) og fortrinsvis opstroms for en mellemkgler (14) i indsugningssystemet.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA202270475A DK181545B1 (en) | 2022-09-30 | 2022-09-30 | A large two-stroke uniflow scavenged turbocharged internal combustion engine configured for reducing ammonia slip and a method for reducing ammonia slip of such an engine |
| JP2023159332A JP2024052583A (ja) | 2022-09-30 | 2023-09-25 | アンモニアスリップを低減するように構成された大型２ストロークユニフロー掃気ターボ過給式内燃機関、およびそのような機関のアンモニアスリップを低減する方法 |
| KR1020230128457A KR20240046056A (ko) | 2022-09-30 | 2023-09-25 | 암모니아 슬립을 감소시키기 위해 구성된 대형 2행정 단류 스캐빈지 터보차저 내연 기관 및 그 엔진의 암모니아 슬립을 감소시키는 방법 |
| CN202311261723.2A CN117803468A (zh) | 2022-09-30 | 2023-09-27 | 被配置成减少氨泄漏的大型二冲程单向流扫气涡轮增压内燃发动机以及用于减少这种发动机的氨泄漏的方法 |
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| DKPA202270475A DK181545B1 (en) | 2022-09-30 | 2022-09-30 | A large two-stroke uniflow scavenged turbocharged internal combustion engine configured for reducing ammonia slip and a method for reducing ammonia slip of such an engine |
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| Publication Number | Publication Date |
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| DK202270475A1 DK202270475A1 (en) | 2024-04-23 |
| DK181545B1 true DK181545B1 (en) | 2024-04-24 |
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| JP (1) | JP2024052583A (da) |
| KR (1) | KR20240046056A (da) |
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| DK181016B1 (en) | 2021-05-26 | 2022-09-26 | Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland | A large two-stroke uniflow scavenged turbocharged internal combustion engine with ammonia absorption system |
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| CN117803468A (zh) | 2024-04-02 |
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