DK201000409A - Large two-stroke diesel engine with an exhaust gas purification system - Google Patents

Large two-stroke diesel engine with an exhaust gas purification system Download PDF

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Publication number
DK201000409A
DK201000409A DKPA201000409A DKPA201000409A DK201000409A DK 201000409 A DK201000409 A DK 201000409A DK PA201000409 A DKPA201000409 A DK PA201000409A DK PA201000409 A DKPA201000409 A DK PA201000409A DK 201000409 A DK201000409 A DK 201000409A
Authority
DK
Denmark
Prior art keywords
scavenge air
combustion engine
type according
stroke combustion
crosshead type
Prior art date
Application number
DKPA201000409A
Inventor
Skjoldager Peter
Original Assignee
Man Diesel & Turbo Deutschland
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Man Diesel & Turbo Deutschland filed Critical Man Diesel & Turbo Deutschland
Priority to DK201000409A priority Critical patent/DK177631B1/en
Priority to JP2011090578A priority patent/JP5581259B2/en
Priority to KR1020110038290A priority patent/KR101400832B1/en
Priority to CN201310073354.4A priority patent/CN103216298B/en
Priority to CN201110120210.0A priority patent/CN102242670B/en
Publication of DK201000409A publication Critical patent/DK201000409A/en
Application granted granted Critical
Publication of DK177631B1 publication Critical patent/DK177631B1/en
Priority to JP2014113717A priority patent/JP5860923B2/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
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • 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
    • F02B37/12—Control of the pumps
    • F02B37/14—Control of the alternation between or the operation of exhaust drive and other drive of a pump, e.g. dependent on speed
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • 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
    • F02B29/0418—Layout of the intake air cooling or coolant circuit the intake air cooler having a bypass or multiple flow paths within the heat exchanger to vary the effective heat transfer surface
    • 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
    • F02B29/0437—Liquid cooled heat exchangers
    • F02B29/0443—Layout of the coolant or refrigerant circuit
    • 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
    • F02B37/12—Control of the pumps
    • F02B37/16—Control of the pumps by bypassing charging air
    • F02B37/168—Control of the pumps by bypassing charging air into the exhaust conduit
    • 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
    • F02D41/0002—Controlling intake air
    • F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
    • 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
    • F02D41/0245—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 by increasing temperature of the exhaust gas leaving the engine
    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/10—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot liquids, e.g. lubricants or cooling water
    • 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
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • 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
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1404—Exhaust gas temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0802—Temperature of the exhaust gas treatment apparatus
    • 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

Abstract

The invention relates to a large turbocharged two stroke diesel engine of the crosshead type comprising a plurality of cylinders that are each connected to an exhaust gas receiver. A selective catalytic reduction reactor is arranged downstream of the exhaust gas receiver. An exhaust conduit connects the outlet of the selective catalytic reduction reactor to a turbine of a turbocharger. The turbine drives a cornpressor of the turbocharger that delivers scavenge air via a scavenge air path to a scavenge air receiver. The scavenge air receiver is connected to the plurality of cylinders. An auxiliary blower in the scavenge air path assists the turbine at low bad conditions. A controllable by pass line extends from the scavenge air receiver to the exhaust conduit. At low engine bad a controlled flow of scavenge air is directed from the scavenge air receiver to the exhaust conduit at a position downstream of the selective catalytic reduction reactor and upstream of the turbine of the turbocharger. This measure increases the temperature of the exhaust gases entering the selective catalytic reduction reactor. Further, a cooler in the scavenge air path can be controlled so as to the cooling effect partially or completely. Alternatively, the cooler can be controlled to become a heater or a heater is installed in the scavenge air path.

Claims (22)

CLAIMS;
1. A large turbocharged two-stroke combustion engine (1) of the crosshead type comprising: a plurality of cylinders that are each connected to an exhaust gas receiver (6), a selective catalytic reduction reactor (6) with an inlet connected to the outlet of the exhaust gas receiver (8}, an exhaust conduit (10) connecting an outlet of the selective catalytic reduction reactor (8} to a turbine (12) of a turbocharger, a compressor (14) of the turbocharger driven by the turbine (12), the compressor (14) delivers scavenge air via a scavenge air path (16) that includes a scavenge air cooler (18) to a scavenge air receiver (22), an auxiliary blower (20) in the scavenge air path (16) for assisting the turbine (14) at low load conditions, the scavenge air receiver (22) is connected to each of the plurality of cylinders, a controllable by pass line (26) extending from a position in the scavenge air path (16) downstream the auxiliary blower or from the scavenge air receiver (22) to a position in the exhaust conduit (10) between the outlet of the selective catalytic reduction reactor (8) and the inlet of the turbine (12), an electronic control unit (33) operably connected to said bypass line (26), said electronic control unit (33) being configured to allow a flow of scavenge air from the scavenge air receiver (22) through said controllable bypass line (26) to the exhaust conduit (10) when the engine load is below a predetermined threshold or when the temperature of the exhaust gases entering the selective catalytic reduction reactor (8) is lower than a given threshold.
2. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 1, wherein the exhaust conduit (10) includes a three port mixing point (30) for mixing the by-passed scavenge air with the exhaust gas.
3. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 1, wherein the bypass line (26) includes a valve (28) for controlling the flow of scavenge air through the by-pass line (26).
4. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 3, wherein said valve (28) is an electronically controlled valve of the on-off type that is controlled in an open loop by the electronic control unit (33).
5. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 3, wherein said valve (28) is an electronically controlled valve of the proportional type that is controlled in a closed loop by the electronic control unit (33) .
6. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 6, further comprising a temperature sensor (35) near the inlet of the selective catalytic reduction reactor (8).
7. A large turbocharged two-stroke combustion engine of the crosshead type according tc claim 1, wherein said scavenge air cooler (18) can be deactivated by the electronic control unit (33).
8. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 7, wherein said electronic control unit (33) is configured to open up for the bypass line (26) as first measure, and to deactivate the scavenge air cooler (18) as a second measure.
9. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 7 or 8, wherein said scavenge air cooler (18) can be turned into a heater by the electronic control unit (33).
10. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 9, wherein said electronic control unit (33) is configured to turn the said scavenge air cooler (18) into a heater as a third measure.
11. A large turbocharged two-stroke combustion engine (1) of the crosshead type comprising: a plurality of cylinders that are each connected to an exhaust gas receiver (6), a selective catalytic reduction reactor (8) with an inlet connected to the outlet of the exhaust gas receiver (6), an exhaust conduit (10) connecting an outlet of the selective catalytic reduction reactor (8) to a turbine (12) of a turbocharger, a compressor (14) of the turbocharger driven by the turbine (12), the compressor (14) delivers scavenge air via a scavenge air path (16) that includes a scavenge air cooler (18) to a scavenge air receiver (22), an auxiliary blower (20) in the scavenge air path (16) for assisting the turbine (14) at low load conditions, the scavenge air receiver (22) is connected to each of the plurality of cylinders, an electronic control unit (33) configured to reduce or deactivate the cooling function of the scavenge air cooler (18) when the engine load is below a given threshold or when the temperature of the exhaust gases entering the selective catalytic reduction reactor (8) is lower than a given threshold.
12. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 11, further comprising a scavenge air bypass conduit (17) for bypassing the scavenge air cooler (18).
13. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 12, further comprising one or more electronically controlled valves (23,21) under command of the electronic control unit (33) for controlling the flow of scavenge air through said scavenge air bypass conduit (17).
14. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 11, further comprising a cooling medium supply conduit (40) with an electronically controlled separation valve (46), a cooling medium return conduit (42) and a cooling medium bypass circuit (43) including an electronically controlled bypass valve (44).
15. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 14, further comprising a recirculation conduit (48) and a recirculation pump ¢50).
16. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 15, further comprising a heat exchanger (52) in the recirculation conduit for heating the medium flowing through the recirculation conduit (48).
17. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 14, further comprising a second scavenge air cooler (19), wherein said electronic control unit (33) is configured to control the cooling capacity of at least one of the scavenge air coolers (18,19).
18. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 11, further comprising a steam injection conduit (90) connected to the scavenge air path (16), said steam injection conduit (50) including an electronically controlled steam injection control valve (92) under command of the electronic control uni- (33).
19. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 11, further comprising an exhaust gas injection conduit (60) connected to the scavenge air path (16), said exhaust gas injection conduit (60) including an electronically controlled exhaust gas injection control valve (62) under command of the electronic control unit (33).
20. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 11, further comprising a heater unit (27) in the scavenge air path.
21. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 20, wherein said heater unit (27) is operated with hot air as a heating medium.
22. A large turbocharged two-stroke combustion engine of the crosshead type according to claim 14, further comprising a heat exchanger (80) in the a cooling medium supply conduit (40) for supplying heat to the medium flowing through the cooling medium supply conduit (40).
DK201000409A 2010-05-10 2010-05-10 Large two-stroke diesel engine with exhaust gas purification system DK177631B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DK201000409A DK177631B1 (en) 2010-05-10 2010-05-10 Large two-stroke diesel engine with exhaust gas purification system
JP2011090578A JP5581259B2 (en) 2010-05-10 2011-04-15 Large 2-cycle diesel engine with exhaust gas purification system
KR1020110038290A KR101400832B1 (en) 2010-05-10 2011-04-25 Large two-stroke diesel engine with an exhaust gas purification system
CN201310073354.4A CN103216298B (en) 2010-05-10 2011-05-10 There is the large-sized two-stroke diesel engine of waste gas cleaning system
CN201110120210.0A CN102242670B (en) 2010-05-10 2011-05-10 Large-sized two-stroke diesel engine having exhaust gas purifying system
JP2014113717A JP5860923B2 (en) 2010-05-10 2014-06-02 Large 2-cycle diesel engine with exhaust gas purification system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK201000409 2010-05-10
DK201000409A DK177631B1 (en) 2010-05-10 2010-05-10 Large two-stroke diesel engine with exhaust gas purification system

Publications (2)

Publication Number Publication Date
DK201000409A true DK201000409A (en) 2011-11-11
DK177631B1 DK177631B1 (en) 2014-01-06

Family

ID=44960887

Family Applications (1)

Application Number Title Priority Date Filing Date
DK201000409A DK177631B1 (en) 2010-05-10 2010-05-10 Large two-stroke diesel engine with exhaust gas purification system

Country Status (4)

Country Link
JP (2) JP5581259B2 (en)
KR (1) KR101400832B1 (en)
CN (2) CN103216298B (en)
DK (1) DK177631B1 (en)

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