CN113565601A - Marine diesel tail gas carbon fixing device - Google Patents

Marine diesel tail gas carbon fixing device Download PDF

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Publication number
CN113565601A
CN113565601A CN202110920813.2A CN202110920813A CN113565601A CN 113565601 A CN113565601 A CN 113565601A CN 202110920813 A CN202110920813 A CN 202110920813A CN 113565601 A CN113565601 A CN 113565601A
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CN
China
Prior art keywords
monoethanolamine
tail gas
diesel engine
absorption pipeline
exhaust
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Pending
Application number
CN202110920813.2A
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Chinese (zh)
Inventor
丁宇
陈斯文
马生平
刘国政
桑意坚
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Harbin Engineering University
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Harbin Engineering University
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Publication date
Application filed by Harbin Engineering University filed Critical Harbin Engineering University
Priority to CN202110920813.2A priority Critical patent/CN113565601A/en
Publication of CN113565601A publication Critical patent/CN113565601A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0857Carbon oxides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04Cooling of air intake supply
    • F02B29/0406Layout of the intake air cooling or coolant circuit
    • F02B29/0437Liquid cooled heat exchangers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Treating Waste Gases (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

The invention aims to provide a marine diesel engine tail gas carbon fixation device which comprises a three-way exhaust valve, an exhaust-heat boiler, an intercooler, an absorption pipeline and a monoethanolamine rich liquid tank, wherein exhaust gas of a diesel engine enters an inlet of the three-way exhaust valve, a first outlet of the three-way exhaust valve is connected with the exhaust-heat boiler, the exhaust-heat boiler is connected with a cooling water tank through a desulfurization and denitrification device and a diffuser pipe, the intercooler is connected with the absorption pipeline through a contraction spray pipe, a liquid discharge port of the absorption pipeline is connected with the monoethanolamine rich liquid tank, and a second outlet of the three-way exhaust valve is connected with a regeneration tower. The invention fully treats the tail gas generated by the diesel engine, not only carries out the traditional desulfurization and denitrification treatment, but also adds a carbon fixation system. The pollution of ship emission to the environment is less. The pregnant solution which absorbs the carbon dioxide has two treatment modes, one mode is directly transported to the land for further treatment, and the other mode is to discharge the carbon dioxide by utilizing the heat in the tail gas generated by the diesel engine so as to realize the recycling.

Description

Marine diesel tail gas carbon fixing device
Technical Field
The invention relates to a diesel engine tail gas treatment device, in particular to a marine diesel engine tail gas treatment device.
Background
When the diesel engine works, the pollution of exhaust emission is inevitably generated. With the emergence of stricter and stricter emission regulations, the treatment of the tail gas of the diesel engine can reduce the pollution of the tail gas discharged by the diesel engine to the atmosphere, and meanwhile, the ship can conform to the stricter and stricter emission regulations.
Emission regulations are increasingly respecting not only the emission of nitrogen oxides and sulfur oxides, but also the emission of carbon dioxide. All countries in the world put restrictions on carbon emissions
At present, most of tail gas treatment of marine diesel engines is to treat desulfurization, denitration, particulate matters and the like, atmospheric pollution caused by ships is reduced, the greenhouse effect of carbon dioxide is not paid enough attention, and almost no ship tail gas treatment device carries out aftertreatment on the emission of the carbon dioxide.
Disclosure of Invention
The invention aims to provide a marine diesel engine tail gas carbon fixation device capable of reducing the content of carbon dioxide in diesel engine tail gas.
The purpose of the invention is realized as follows:
the invention relates to a marine diesel engine tail gas carbon fixation device, which is characterized in that: including tee bend discharge valve, exhaust-heat boiler, intercooler, absorption pipeline, monoethanolamine rich liquid jar, the diesel engine exhaust gets into tee bend discharge valve's import, tee bend discharge valve's first exit linkage exhaust-heat boiler, exhaust-heat boiler passes through, SOx/NOx control device, diffuser pipe connect the cooling water tank, and the intercooler passes through the shrink spray tube and connects the absorption pipeline, and the leakage fluid dram connection monoethanolamine rich liquid jar of absorption pipeline, tee bend discharge valve's second exit linkage regeneration tower.
The present invention may further comprise:
1. the fresh water pump is connected with the intercooler, and the sea water pump is connected with the cooling water heat exchanger.
2. The device also comprises a monoethanolamine barren liquor tank and a monoethanolamine pump, wherein the monoethanolamine barren liquor tank, the monoethanolamine pump, an absorption pipeline, a monoethanolamine rich liquor tank and a regeneration tower are sequentially connected, the regeneration tower is connected with the monoethanolamine barren liquor tank, and a three-way liquid discharge valve is arranged between the monoethanolamine rich liquor tank and the regeneration tower.
3. The absorption pipeline is internally provided with a nozzle and a collection port, and the monoethanolamine sprayed out from the nozzle is impacted on the pipe wall of the absorption pipeline and flows into the monoethanolamine rich liquid tank through the collection port.
The invention has the advantages that:
1. the heat in the tail gas discharged by the diesel engine is fully utilized, the tail gas of the diesel engine is discharged to a waste heat boiler for utilization when carbon dioxide needs to be absorbed, and the tail gas of the diesel engine is discharged to a regeneration tower for utilization when the carbon dioxide needs to be released.
2. The tail gas generated by the diesel engine is fully treated, so that the traditional desulfurization and denitrification treatment is carried out, and a carbon fixation system is added. The pollution of ship emission to the environment is less.
3. The pregnant solution which absorbs the carbon dioxide has two treatment modes, one mode is directly transported to the land for further treatment, and the other mode is to discharge the carbon dioxide by utilizing the heat in the tail gas generated by the diesel engine so as to realize the recycling.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of an absorption pipeline.
Detailed Description
The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:
with reference to fig. 1-2, the marine diesel engine tail gas carbon fixation device of the invention comprises a diesel engine 1, a three-way exhaust valve 2, a waste heat boiler 3, a desulfurization and denitrification device 4, a diffuser pipe 5, a fresh water pump 6, an intercooler 8, a sea water pump 17, a cooling water heat exchanger 18, a cooling water tank 7, a fresh water pump 6, a contraction nozzle 16, a monoethanolamine lean liquor tank 11, a valve 10, a monoethanolamine rich liquor tank 14, an absorption pipeline 12, a regeneration tower 13, a monoethanolamine pump 9, a three-way drain valve 15, a connecting pipeline and the like. The exhaust of the diesel engine is divided into two branches after passing through the three-way exhaust valve 2, a first outlet of the three-way exhaust valve is connected with the waste heat boiler 3, the exhaust gas enters the diffuser pipe 5 after being cooled for the first time by the waste heat boiler 3, the adiabatic compression temperature is increased, the exhaust gas is cooled for the second time by the intercooler 8 and then is cooled for the third time by the contraction spray pipe 14, the reaction temperature condition of the monoethanolamine is reached, the exhaust gas reacts with the monoethanolamine in the absorption pipeline 11, the content of carbon dioxide in the exhaust gas is reduced, a second outlet of the three-way exhaust valve is connected with the regeneration tower 12, and the monoethanolamine can be recycled.
The exhaust gas discharged by the diesel engine is cooled for the first time through the waste heat boiler 3, then enters the diffuser pipe 5 for adiabatic compression temperature rise, is cooled for the second time after exchanging heat with cooling water through the intercooler 8, and then enters the contraction spray pipe 16 for adiabatic expansion for the third time.
The secondary cooling is divided into two cooling paths, the circulating working medium of the intercooler 8 is fresh water, cooling water in the cooling water tank 7 enters the cooling water heat exchanger 18 to exchange heat with low-temperature seawater brought by the seawater pump 17 after the heat exchange temperature of the cooling water and the tail gas of the diesel engine is raised through the intercooler 8, and the cooling water returns to the cooling water tank 7 after the temperature is lowered for recycling.
Monoethanolamine reacts with carbon dioxide in marine diesel engine exhaust in the absorption pipeline 11 to generate monoethanolamine rich liquid, the monoethanolamine rich liquid is stored in the monoethanolamine rich liquid tank 14, and the diesel engine exhaust can be heated to release carbon dioxide for recycling.
Monoethanolamine reacts with carbon dioxide in the tail gas of the marine diesel engine in the absorption pipeline 11 to generate monoethanolamine rich liquid, the monoethanolamine rich liquid is stored in the monoethanolamine rich liquid tank 14, and the monoethanolamine rich liquid in the monoethanolamine rich liquid tank 14 can also be transported to shore through the three-way liquid discharge valve 15 for further treatment.
The absorption pipeline is at 80 degrees, the monoethanolamine is sprayed out from the nozzle 19, is impacted on the wall of the absorption pipeline by high-speed incoming flow, flows through the wall surface under the action of gravity, and finally flows into the monoethanolamine enriched liquid tank 14 through the collecting port.
The tail gas of the diesel engine 1 is connected into a three-way exhaust valve 2, and the three-way exhaust valve 2 is connected with a waste heat boiler 3 and a regeneration tower 13, and the working mode is determined according to the situation. When carbon dioxide needs to be absorbed, the three-way exhaust valve 2 is connected with the waste heat boiler 3, is connected with the desulfurization and denitrification device 4 after being primarily cooled by the waste heat boiler 3, completely absorbs nitrogen oxides and sulfur oxides in the tail gas of the marine diesel engine through desulfurization and denitrification in the desulfurization and denitrification device 4, then enters the diffuser pipe 5, the heat is insulated and compressed in the pipe, the temperature is increased, the heat enters an intercooler 8 for secondary cooling, then the heat passes through a contraction spray pipe 14, and (3) adiabatically expanding in the contraction spray pipe 14, and carrying out third temperature reduction in the process to reach the condition of the reaction temperature of the monoethanolamine and the carbon dioxide, wherein the carbon dioxide in the tail gas of the marine diesel engine after the third temperature reduction and the monoethanolamine are subjected to chemical reaction in the absorption pipeline 12 to generate carbonate, and the carbon dioxide is absorbed into a monoethanolamine rich solution in the part, so that the content of the carbon dioxide in the exhaust gas is reduced. A monoethanolamine rich solution produced after the monoethanolamine has absorbed carbon dioxide is stored in the monoethanolamine rich solution tank 14. The cooling water is discharged from the cooling water tank 7, enters the intercooler 8 through the fresh water pump 6 to absorb heat, then enters the cooling water heat exchanger 18 to form low-temperature cooling water together with the heat replaced by the seawater, and finally returns to the cooling water tank 7 for recycling.
The absorption pipeline 12 is at 80 degrees, and the monoethanolamine is sprayed out from the monoethanolamine nozzle 19, impacted on the wall of the absorption pipeline by high-speed incoming flow, flows through the wall surface under the action of gravity, and finally flows into the monoethanolamine enriched liquid tank 14 through the collecting port 22.
The monoethanolamine rich liquid tank 14 passes through a three-way liquid discharge valve 15, a first outlet of the three-way liquid discharge valve is connected with a regeneration tower 13, the regeneration tower is connected with a second outlet of a three-way exhaust valve, and when partial carbon dioxide needs to be released, the monoethanolamine rich liquid is heated by using heat in tail gas of a diesel engine to release the absorbed carbon dioxide, so that the monoethanolamine can be recycled. The second outlet of the three-way drain valve 15 allows the monoethanolamine-rich liquid to be transported to land for further processing.
As shown in fig. 1, according to the carbon sequestration device for marine diesel engine tail gas, the tail gas of a diesel engine 1 is connected to a three-way exhaust valve 2, the three-way exhaust valve 2 is connected to a waste heat boiler 3 and a regeneration tower 13, the working mode of the device is determined according to circumstances, the device is connected to a waste heat boiler 3 when carbon dioxide needs to be absorbed, the device is connected to a desulfurization and denitrification device 4 after the waste heat boiler 3 is subjected to primary cooling, the tail gas is subjected to desulfurization and denitrification, enters a diffuser pipe 5 and is subjected to adiabatic compression in the pipe, the tail gas is subjected to secondary cooling after the temperature rises, and then is subjected to tertiary cooling through a contraction spray pipe 14 to reach the reaction condition of monoethanolamine and carbon dioxide, and the carbon dioxide reacts with monoethanolamine in an absorption pipeline 12, so that the content of carbon dioxide in exhaust gas is reduced. A monoethanolamine rich solution produced after the monoethanolamine has absorbed carbon dioxide is stored in the monoethanolamine rich solution tank 14.
As shown in fig. 2, the absorption pipe 12 is at 80 °, and the monoethanolamine solution is ejected from the monoethanolamine nozzle 19, is impacted on the wall of the absorption pipe by a high-speed incoming flow when absorbing carbon dioxide, flows through the wall surface by the action of gravity, and finally flows into the monoethanolamine-rich liquid tank 14 through the collection port 22.
The internal circulation fresh water is discharged from the cooling water tank 7, enters the intercooler 8 through the fresh water pump 6 to absorb heat, then enters the cooling water heat exchanger 18 to exchange heat with the external circulation seawater, cools the internal circulation fresh water, and finally returns to the cooling water tank 7 to be recycled. The external circulation system comprises a sea water pump 17 and a water inlet and drainage pipeline.
The monoethanolamine rich liquid tank 14 passes through a three-way liquid discharge valve 15, a first outlet of the three-way liquid discharge valve is connected with a regeneration tower 13, the regeneration tower is connected with a second outlet of a three-way exhaust valve, and when partial carbon dioxide needs to be released, the monoethanolamine rich liquid is heated by using heat in tail gas of a diesel engine to release the absorbed carbon dioxide, so that the monoethanolamine can be recycled. The second outlet of the three-way drain valve 15 allows the monoethanolamine-rich liquid to be transported to land for further processing.
The tail gas cooling system utilizes the principle that the diffusion pipe realizes the adiabatic compression function under the subsonic speed condition and the contraction spray pipe realizes the adiabatic expansion function under the subsonic speed condition.
The carbon dioxide collecting system realizes the collection and release of carbon dioxide by using the monoethanolamine technology MEA.

Claims (5)

1. The utility model provides a marine diesel tail gas carbon fixation device which characterized by: including tee bend discharge valve, exhaust-heat boiler, intercooler, absorption pipeline, monoethanolamine rich liquid jar, the diesel engine exhaust gets into tee bend discharge valve's import, tee bend discharge valve's first exit linkage exhaust-heat boiler, exhaust-heat boiler passes through, SOx/NOx control device, diffuser pipe connect the cooling water tank, and the intercooler passes through the shrink spray tube and connects the absorption pipeline, and the leakage fluid dram connection monoethanolamine rich liquid jar of absorption pipeline, tee bend discharge valve's second exit linkage regeneration tower.
2. The marine diesel engine tail gas carbon sequestration device of claim 1, characterized by: the fresh water pump is connected with the intercooler, and the sea water pump is connected with the cooling water heat exchanger.
3. The marine diesel engine tail gas carbon sequestration device according to claim 1 or 2, characterized in that: the device also comprises a monoethanolamine barren liquor tank and a monoethanolamine pump, wherein the monoethanolamine barren liquor tank, the monoethanolamine pump, an absorption pipeline, a monoethanolamine rich liquor tank and a regeneration tower are sequentially connected, the regeneration tower is connected with the monoethanolamine barren liquor tank, and a three-way liquid discharge valve is arranged between the monoethanolamine rich liquor tank and the regeneration tower.
4. The marine diesel engine tail gas carbon sequestration device according to claim 1 or 2, characterized in that: the absorption pipeline is internally provided with a nozzle and a collection port, and the monoethanolamine sprayed out from the nozzle is impacted on the pipe wall of the absorption pipeline and flows into the monoethanolamine rich liquid tank through the collection port.
5. The marine diesel engine tail gas carbon sequestration device of claim 3, characterized by: the absorption pipeline is internally provided with a nozzle and a collection port, and the monoethanolamine sprayed out from the nozzle is impacted on the pipe wall of the absorption pipeline and flows into the monoethanolamine rich liquid tank through the collection port.
CN202110920813.2A 2021-08-11 2021-08-11 Marine diesel tail gas carbon fixing device Pending CN113565601A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110920813.2A CN113565601A (en) 2021-08-11 2021-08-11 Marine diesel tail gas carbon fixing device

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Application Number Priority Date Filing Date Title
CN202110920813.2A CN113565601A (en) 2021-08-11 2021-08-11 Marine diesel tail gas carbon fixing device

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CN113565601A true CN113565601A (en) 2021-10-29

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03238025A (en) * 1990-02-13 1991-10-23 Mitsui Eng & Shipbuild Co Ltd Apparatus for treating carbon dioxide of closed circuit diesel engine
US20130298761A1 (en) * 2011-01-20 2013-11-14 Saudi Arabian Oil Company Liquid, slurry and flowable powder adsorption/absorption method and system utilizing waste heat for on-board recovery and storage of co2 from motor vehicle internal combustion engine exhaust gases
JP2015000360A (en) * 2013-06-14 2015-01-05 バブコック日立株式会社 Exhaust gas treatment device and exhaust gas treatment method
CN104314647A (en) * 2014-11-07 2015-01-28 上海海事大学 Method and device for recycling carbon dioxide in tail gas of marine diesel engine
CN104358627A (en) * 2014-11-04 2015-02-18 哈尔滨工程大学 Ship diesel engine NOx and Sox combined emission reduction device and control method
CN105134351A (en) * 2015-10-12 2015-12-09 上海海事大学 Ship engine exhaust gas residual heat cyclic utilization device
CN105797553A (en) * 2016-05-06 2016-07-27 哈尔滨工程大学 Desulfurization and denitration combined treatment device of tail gas of marine diesel engine
CN105888794A (en) * 2016-05-12 2016-08-24 上海海事大学 Device and method for achieving pollution-free emission of tail gas of liquefied natural gas marine diesel engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03238025A (en) * 1990-02-13 1991-10-23 Mitsui Eng & Shipbuild Co Ltd Apparatus for treating carbon dioxide of closed circuit diesel engine
US20130298761A1 (en) * 2011-01-20 2013-11-14 Saudi Arabian Oil Company Liquid, slurry and flowable powder adsorption/absorption method and system utilizing waste heat for on-board recovery and storage of co2 from motor vehicle internal combustion engine exhaust gases
JP2015000360A (en) * 2013-06-14 2015-01-05 バブコック日立株式会社 Exhaust gas treatment device and exhaust gas treatment method
CN104358627A (en) * 2014-11-04 2015-02-18 哈尔滨工程大学 Ship diesel engine NOx and Sox combined emission reduction device and control method
CN104314647A (en) * 2014-11-07 2015-01-28 上海海事大学 Method and device for recycling carbon dioxide in tail gas of marine diesel engine
CN105134351A (en) * 2015-10-12 2015-12-09 上海海事大学 Ship engine exhaust gas residual heat cyclic utilization device
CN105797553A (en) * 2016-05-06 2016-07-27 哈尔滨工程大学 Desulfurization and denitration combined treatment device of tail gas of marine diesel engine
CN105888794A (en) * 2016-05-12 2016-08-24 上海海事大学 Device and method for achieving pollution-free emission of tail gas of liquefied natural gas marine diesel engine

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