FI127439B - Internal combustion engine and method for operating an internal combustion engine - Google Patents

Internal combustion engine and method for operating an internal combustion engine Download PDF

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Publication number
FI127439B
FI127439B FI20146158A FI20146158A FI127439B FI 127439 B FI127439 B FI 127439B FI 20146158 A FI20146158 A FI 20146158A FI 20146158 A FI20146158 A FI 20146158A FI 127439 B FI127439 B FI 127439B
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FI
Finland
Prior art keywords
exhaust gas
combustion engine
internal combustion
absorber
regeneration
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Application number
FI20146158A
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Finnish (fi)
Swedish (sv)
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FI20146158A (en
Inventor
Plamen Toshev
Stephan Schlüter
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Man Diesel & Turbo Se
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Publication of FI20146158A publication Critical patent/FI20146158A/en
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Publication of FI127439B publication Critical patent/FI127439B/en

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B01D53/82—Solid phase processes with stationary reactants
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F02B29/0412—Multiple heat exchangers arranged in parallel or in series
    • 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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/306—Surface area, e.g. BET-specific surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Supercharger (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention relates to an internal combustion engine (10), in particular a large diesel engine such as a diesel internal combustion engine for a ship, comprising an at least one-stage exhaust gas supercharging system (12), which has at least one exhaust gas turbocharger (14, 15) having a compressor (16, 17) and a turbine (18, 19), and comprising an exhaust gas recirculation system (13), which diverts exhaust gas from the exhaust gas flow and mixes said exhaust gas with compressed charge air, wherein the exhaust gas recirculation system (13) comprises a desulfurizing device (24), which is used to desulfurize the exhaust gas conducted by means of the exhaust gas recirculation system (13), and wherein the desulfurizing device (24) is designed as a fixed-bed adsorber (27).

Description

Internal combustion engine and method for operating an internal combustion engine
The invention relates to an internal combustion engine, in particular a large diesel engine such as an internal combustion diesel engine for a ship, according to the preamble of Claim 1. The invention furthermore relates to a method for operating such an internal combustion engine.
From DE 10 2008 061 399 A1 an internal combustion engine having an exhaust gas supercharging system and an exhaust gas recirculation system is known. Accordingly, the internal combustion engine known from this prior art comprises an exhaust gas supercharging system having two exhaust gas turbochargers, wherein each exhaust gas turbocharger comprises a compressor and a turbine. The two exhaust gas turbochargers in this case are connected in series one behind the other. The exhaust gas recirculation system of the internal combustion engine according to DE 10 2008 061 399 A1 serves for diverting exhaust gas from the exhaust gas flow directly after the internal combustion engine and for mixing the exhaust gas with compressed charged air between the two compressors of the two exhaust gas turbochargers which are connected in series one behind the other, wherein according to this prior art the exhaust gas recirculation system is assigned a desulphurizing device in order to remove sulphur and other acidic components from the exhaust gas flow. The desulphurizing device according to this prior art is an exhaust gas scrubber, in which scrubbing water mixed with sodium hydroxide solution or with other chemicals is employed for exhaust gas desulphurizing. Such exhaust gas scrubbers require elaborate water conditioning and use a lot of water. In addition, such exhaust gas scrubbers can only be employed with 2-stroke combustion engines.
Starting out from this, the invention is based on the object of creating a new type of internal combustion engine and a method for operating the same.
This object is solved through an internal combustion engine according to Claim 1.
According to the invention, the desulphurizing device is embodied as a fixed-bed adsorber.
With the invention it is proposed for the first time to carry out 35 desulphurizing of the exhaust gas in the region of the exhaust gas recirculation using a desulphurizing device designed as a fixed-bed adsorber. This has the
20146158 prh 27-03- 2018 advantage that water conditioning that is required in exhaust gas scrubbers can be omitted. Furthermore, the required water consumption can be drastically reduced. In addition to this, the invention can be utilized both with 2stroke internal combustion engines and also with 4-stroke internal combustion engines.
An exhaust gas recirculation cooler is arranged upstream of the fixed-bed adsorber in order to cool the exhaust gas to be conducted via the fixed-bed adsorber. Cooling of the exhaust gas in the region of the exhaust gas recirculation system with the help of the exhaust gas recirculation cooler before conducting the exhaust gas via the fixed-bed adsorber allows operating the fixed-bed adsorber under optimum operating conditions.
The fixed-bed adsorber in an operating mode serves for desulphurizing exhaust gas and in a regeneration mode for regenerating the adsorbent of the fixed-bed adsorber. A condensate water collector is assigned to the exhaust gas recirculation cooler, wherein in the regeneration mode for regenerating the adsorbent condensate water collected in the condensate water collector can be utilized for scrubbing the adsorbent. In particular when the fixed-bed adsorber can be operated both in an operating mode and also in a regenerating mode, highly effective desulphurizing of the exhaust gas in the region of the exhaust gas recirculation system can be ensured through regeneration of the fixed-bed adsorber without the need of replacing the adsorbent. Regenerating the adsorbent of the fixed-bed adsorber with the help of the condensate water is simple and cost-effective in terms of the process.
The method according to the invention for operating an internal combustion engine is defined in Claim 5.
Preferred further developments of the invention are obtained from the subclaims and the following description. Exemplary embodiments of the invention are explained in more detail with the help of the drawing without being restricted to these. Here it shows:
Fig. 1: a diagram of an internal combustion engine according to the invention.
The present invention relates to an internal combustion engine, in particular to a large diesel engine such as an internal combustion engine diesel engine for a ship. Such an internal combustion engine is operated with heavy fuel oil or marine diesel fuel. Such fuels generally have a high sulphur content.
20146158 prh 27-03- 2018
Fig. 1 shows a schematic representation of an internal combustion engine 10 comprising multiple cylinders 11 in which fuel is combusted. The internal combustion engine 10 furthermore comprises an exhaust gas supercharging system 12, wherein in the exhaust gas supercharging system exhaust gas is expanded and energy extracted in the process utilized for compressing charge air. In addition to the exhaust gas supercharging 12, the internal combustion engine comprises an exhaust gas recirculation system 13 in order to mix exhaust gas with charge air.
In the shown exemplary embodiment, the exhaust gas supercharging system 12 comprises two exhaust gas turbochargers 14 and 15, wherein each of the exhaust gas turbochargers 14 and 15 comprises a compressor 16 and 17 respectively and a turbine 18 and 19 respectively. The turbine 18 of the exhaust gas turbocharger 14 of the exhaust gas supercharging system 12 according to Fig. 1 acts as a high-pressure turbine and the turbine 19 of the exhaust gas turbocharger 15 as a low-pressure turbine. The compressor 17 of the exhaust gas turbocharger 15 acts as a low-pressure compressor and the compressor 16 of the exhaust gas turbocharger 14 acts as a high-pressure compressor.
Exhaust gas leaving the cylinders 11 of the internal combustion engine 10 in the region of the exhaust gas supercharging system 12 is initially expanded in the region of the high-pressure turbine 18 and subsequently in the region of the low-pressure turbine 19. Energy extracted in the process is utilized for driving a respective compressor 16 and 17 respectively, wherein the high-pressure turbine 18 drives the high-pressure compressor 16 and the low25 pressure turbine 19 the low-pressure compressor 17. The charge air is initially compressed in the region of the low-pressure compressor 17 and subsequently of the high-pressure compressor 16. As is evident from Fig. 1, a air cooler 20 and 21 each is positioned downstream of the compressor 17 of the exhaust gas turbocharger 15 and downstream of the compressor 16 of the exhaust gas turbocharger 14 in order to cool the respective compressed charge air.
In the exemplary embodiment of Fig. 1, a bypass line 22, with a bypass valve 23 assigned to the same, is connected downstream of the compressor 16 of the turbocharger 14 and upstream of the charge air cooler
20, wherein via the bypass line 22 with opened bypass valve 23 charge air can
20146158 prh 27-03- 2018 be directed past the internal combustion engine 10 in the direction of the turbine 18 of the exhaust gas turbocharger 14.
As already explained, the exhaust gas supercharging system 12 in the exemplary embodiment comprises two exhaust gas turbochargers 14 and
15. Instead of such a two-stage exhaust gas supercharging system, a singlestage exhaust gas supercharging system with merely a single exhaust gas turbocharger can also be employed.
In addition to the exhaust gas supercharging system 12, the internal combustion engine 10 comprises the exhaust gas recirculation system 13, wherein according to Fig. 1 exhaust gas is diverted via the exhaust gas recirculation system 13 directly after the internal combustion engine 10 and accordingly upstream of the turbine 18 of the exhaust gas turbocharger 14 and conducted via a desulphurizing device 24 assigned to the exhaust gas recirculation system 13 in order to desulphurize the exhaust gas before the same is mixed in the exemplary embodiment of Fig. 1 with the compressed charge air downstream of the charge air cooler 20 and accordingly directly before the internal combustion engine 10.
In contrast with the shown exemplary embodiment it is also possible to mix the desulphurized exhaust gas which is conducted via the exhaust gas recirculation system 13 downstream of the charge air cooler 21 and upstream of the compressor 16 with the compressed charge air.
Transporting the exhaust gas through the exhaust gas recirculation system 13 is dependent on the one hand on the opening position of an exhaust gas recirculation valve 25 and on the other hand on the rotational speed of an exhaust gas recirculation blower 26.
The desulphurizing device 24, which serves for desulphurizing the exhaust gas conducted via the exhaust gas recirculation system 13 according to the invention is a fixed-bed adsorber 27 which as adsorbent preferentially comprises activated carbon and/or zeolite. Preferentially, the fixed-bed adsorber 27 comprises the adsorbent in a bulk density between 100kg/m3 and 800kg/m3 and/or with an active surface area between 100m2/g and 1,200m2/g.
In the shown exemplary embodiment, an exhaust gas recirculation cooler 28 is arranged upstream of the fixed-bed adsorber 27. The exhaust gas recirculation cooler 28 serves for cooling the exhaust gas which, with the exhaust gas recirculation valve 25 opened, is conducted via the exhaust gas
20146158 prh 27-03- 2018 recirculation system 13 before said exhaust gas is fed to the fixed-bed adsorber 27.
While the exhaust gas to be desulphurized is conducted through the desulphurizing device 24 designed as a fixed-bed adsorber 27, sulphur of the exhaust gas is bound in the adsorbent with a high effectiveness wherein for maintaining highly effective desulphurizing either the adsorbent of the fixedbed adsorber 27 has to be renewed or alternatively regenerated after a defined process period.
In the preferred exemplary embodiment, the fixed-bed adsorber 27 in an operating mode serves for desulphurizing the exhaust gas, which is conducted via the exhaust gas recirculation system 13, and in a regeneration mode, for regenerating the adsorbent of the fixed-bed adsorber 27, wherein in the preferred exemplary embodiment regeneration of the fixed-bed adsorber is effected with the help of condensate water.
Accordingly, Fig. 1 shows that the exhaust gas recirculation cooler is assigned a condensate water collector 29 in which condensate water forming during the operating mode can be collected. In the regenerating mode, this condensate water can be removed from the condensate water collector 29 with the help of a feed pump 30 and conducted via the adsorbent of the fixed20 bed adsorber 27 in order to regenerate the adsorbent of the same.
In the operating mode of the fixed-bed adsorber 27, the exhaust gas, as already mentioned, which is conducted via the exhaust gas recirculation system 13 is cooled with the help of the exhaust gas recirculation cooler 28 in such a manner that the exhaust gas can be conducted over the fixed-bed adsorber 27 with a temperature between 30°C and 200°C, in particular with a temperature between 30°C and 150°C, preferentially with a temperature of approximately 90°C, wherein the dwell time of the exhaust gas in the region of the fixed-bed adsorber 27 is less than 10 seconds, preferentially less than 5 seconds.
The regenerating mode of the fixed-bed adsorber 17, which serves for regenerating the adsorbent of the same, is preferentially carried out in fixed time intervals for example once every day or multiple times a day, depending on the sulphur load and the dimension of the adsorbent. The regenerating mode in this case lasts between 5 minutes and 10 minutes.
The internal combustion engine according to the invention allows an entirely new type of desulphurizing of the exhaust gas which is conducted via the exhaust gas recirculation 13. Desulphurizing is effected with the help of a fixed-bed adsorber 27, wherein the adsorbent is preferentially activated carbon and zeolite.
During desulphurizing only little water is needed. Elaborate water 5 conditioning, which is required according to the prior art, can be omitted. Condensate water and/or waste water can be atomised into the exhaust gas according to Fig. 1 downstream of the last turbine 19 or atomised in the corresponding exhaust line and disposed of in this way.
The invention can be employed with 2-stroke internal combustion 10 engines and also with 4-stroke internal combustion engines.
The invention can be employed both in internal combustion engines with a single-stage exhaust gas supercharging system and also in internal combustion engines with multi-stage exhaust gas supercharging system.
Preferentially, the invention is employed in large diesel engines 15 such as internal combustion diesel engines for ships.
20146158 prh 27-03- 2018
List of reference numbers
10 Internal combustion engine
11 Cylinder
5 12 Exhaust gas supercharging system
13 Exhaust gas recirculation system
14 Exhaust gas turbocharger
15 Exhaust gas turbocharger
16 Compressor
10 17 Compressor
18 Turbine
19 Turbine
20 Charge air cooler
21 Charge air cooler
15 22 Bypass line
23 Bypass valve
24 Desulphurizing device
25 Exhaust gas recirculation valve
26 Exhaust gas recirculation blower
20 27 Fixed-bed adsorber
28 Exhaust gas recirculation cooler
29 Condensate water collector
30 Feed pump
20146158 prh 27-03- 2018

Claims (5)

1. Polttovoimakone, erityisesti suurdieselmoottori, kuten laivadieselpolttovoimakone, jossa on vähintään yksivaiheinen pakokaasuahto (12), joka käsittää vähintään yhden pakokaasuturboahtimen (14, 15), jossa on kulloinkinA combustion engine, in particular a large diesel engine, such as a marine diesel engine, having at least a single-stage exhaust gas turbine (12), comprising at least one exhaust turbocharger (14, 15), each having 5 kompressori (16, 17) ja turbiini (18, 19), ja pakokaasun takaisinkierrätys (13), joka poikkeuttaa pakokaasua pakokaasuvirrasta ja sekoittaa sitä puristettuun ahtoilmaan, jolloin pakokaasun takaisinkierrätys (13) käsittää rikinpoistolaitteen (24), joka toimii pakokaasun takaisinkierrätyksen (13) kautta johdetun pakokaasun rikinpoistossa, tunnettu siitä, että rikinpoistolaite (24) onA compressor (16, 17) and a turbine (18, 19), and an exhaust gas recirculation (13) that deflects the exhaust gas from the exhaust stream and mixes it with the compressed charge air, wherein the exhaust gas recirculation (13) comprises a desulphurisation device (24) ) through the desulphurization of exhaust gas through which the desulphurisation device (24) is located 10 muodostettu kiinteäkerrosabsorboijaksi (27), kiinteäkerrosabsorboijan (27) eteen on sijoitettu pakokaasun takaisinkierrätyksen jäähdytin (28) kiinteäkerrosabsorboijan (27) kautta johdettavan pakokaasun jäähdyttämiseksi, pakokaasun takaisinkierrätyksen jäähdyttimelle (28) on järjestetty kondenssivedenkerääjä (29), jolloin kiinteäkerrosabsorboijan (27) absorboivan aineen10 formed as a fixed bed absorber (27), an exhaust gas recirculation condenser (28) is provided on the exhaust gas recirculation absorber (27), 15 regeneroinnin regenerointitilassa kondenssivedenkerääjään (29) kerätty kondenssivesi käytetään absorboivan aineen pesemiseen, ja että on järjestetty siirtopumppu (30), jonka avulla regenerointitilassa kondenssivesi otetaan kondenssivedenkerääjästä (29) ja syötetään kiinteäkerrosabsorboijaan (27) absorboivan aineen regenerointiin.In the regeneration regeneration state, the condensate water collected in the condensate water collector (29) is used to wash the absorbent material, and a transfer pump (30) is provided to collect the condensate water from the condensate water collector (29) and feed to the solid bed 2020 2. Patenttivaatimuksen 1 mukainen polttovoimakone, tunnettu siitä, että kiinteäkerrosabsorboijan (27) absorboivana aineena on aktiivihiili ja/tai zeoliitti.Combustion engine according to Claim 1, characterized in that the absorbent material of the solid-layer absorber (27) is activated carbon and / or zeolite. 3. Patenttivaatimuksen 1 tai 2 mukainen polttovoimakone, tunnettu siitä, että kiinteäkerrosabsorboijan (27) absorboivalla aineella onA combustion engine according to claim 1 or 2, characterized in that the absorber of the fixed bed absorber (27) has 25 välillä 100 - 800 kg/m3 oleva tilavuuspaino ja välillä 100 - 1200 m2/g oleva aktiivinen pinta.25, and an active surface area of between 100 and 1200 m2 / g. 4. Jonkin patenttivaatimuksen 1 - 3 mukainen polttovoimakone, tunnettu siitä, että kiinteäkerrosabsorboija (27) toimii pakokaasun rikinpoistokäyttötilassa ja kiinteäkerrosabsorboijan (27) absorboivan aineenA combustion engine according to any one of claims 1 to 3, characterized in that the fixed bed absorber (27) operates in an exhaust gas desulphurisation state and the solid bed absorber (27) 30 regeneroinnin regenerointitilassa.30 regeneration in regeneration mode. 5. Menetelmä jonkin patenttivaatimuksen 1 - 4 mukaisen polttovoimakoneen käyttämiseksi, tunnettu siitä, että kiinteäkerrosabsorboijan käyttötilassa pakokaasu ennen kiinteäkerrosabsorboijaa jäähdytetään välillä 30 - 200 °C olevaan lämpötilaan, jolloin pakokaasun viipymisaika kiinteä35 kerrosabsorboijassa on vähemmän kuin 10 sekuntia.A method for operating a combustion engine according to any one of claims 1 to 4, characterized in that in the operating mode of the fixed bed absorber, the exhaust gas before the fixed bed absorber is cooled to a temperature between 30 and 200 ° C, wherein the exhaust gas residence time is less than 10 seconds. 6. Patenttivaatimuksen 5 mukainen menetelmä, tunnettu siitä, että kiinteäkerrosabsorboijan regenerointitilassa kiinteäaineabsorboijan absorboivaa ainetta huuhdellaan kondenssivedellä, jolloin regenerointitilan kesto on välillä 5-10 minuuttia.6. A method according to claim 5, characterized in that in the solid bed adsorbent regeneration space, the solid absorbent absorbent material is flushed with condensation water, the regeneration space being between 5 and 10 minutes. 5 7. Patenttivaatimuksen 6 mukainen menetelmä, tunnettu siitä, että kiinteäkerrosabsorboijan regenerointitila suoritetaan kiinteissä aikaväleissä.A method according to claim 6, characterized in that the regeneration mode of the fixed bed adsorbent is performed at fixed time intervals.
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