CN117404174A - System and method for recycling waste gas of ship main engine - Google Patents
System and method for recycling waste gas of ship main engine Download PDFInfo
- Publication number
- CN117404174A CN117404174A CN202311483323.6A CN202311483323A CN117404174A CN 117404174 A CN117404174 A CN 117404174A CN 202311483323 A CN202311483323 A CN 202311483323A CN 117404174 A CN117404174 A CN 117404174A
- Authority
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- Prior art keywords
- pipeline
- waste gas
- supercharger
- main engine
- exhaust
- Prior art date
- Legal status (The legal status 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 status listed.)
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- 239000002912 waste gas Substances 0.000 title claims abstract description 69
- 238000004064 recycling Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 60
- 230000001105 regulatory effect Effects 0.000 claims abstract description 46
- 239000000446 fuel Substances 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 230000001276 controlling effect Effects 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims description 18
- 230000009977 dual effect Effects 0.000 claims description 7
- 239000002737 fuel gas Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 239000013505 freshwater Substances 0.000 claims description 5
- 239000000295 fuel oil Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002699 waste material 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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/04—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only
- F02B47/08—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only the substances including exhaust gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of 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
- 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
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system
-
- 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)
- Supercharger (AREA)
Abstract
The invention discloses a ship main engine waste GAS recycling system and a method, which burn CH by a dual-fuel main engine in a GAS mode 4 The generated waste gas is discharged into a waste gas pipeline through a supercharger, 50% of the waste gas enters the return air pipeline by controlling a ratio regulating valve group on the exhaust pipeline and the return air pipeline which are connected in parallel with the waste gas pipeline, is cooled by a cooling tower on the return air pipeline and then returns to the supercharger, and enters a dual-fuel host machine for secondary combustion after reaching the optimal mixing ratio with fresh air in the supercharger, thereby realizing the maximization of combustion efficiency and improving CH 4 Is used for combustion.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a ship main engine waste gas recycling system and method.
Background
Dual fuel host for large vessels with CH 4 As fuel, there will always be some CH when burning 4 And cannot burn completely, and is discharged to the atmosphere together with the exhaust gas. CH (CH) 4 The escape not only wastes energy, but also pollutes air, and produces greenhouse effect. Therefore, how to reduce CH 4 Escape is a common concern of manufacturers and shipyards of large diesel engines at present, and is a common problem and challenge for achieving efficient and clean combustion of diesel engines to achieve zero emission requirements.
Disclosure of Invention
In view of the above, the invention provides a system and a method for recycling and reusing waste gas of a marine main engine, which has simple operation system and safe use and maintenance, and can reduce CH by at least 50% based on the prior art 4 Escaping, the fuel gas consumption is reduced by about 4 percent.
The utility model provides a boats and ships host computer waste gas recovery system of recycling which characterized in that includes
A dual-fuel host,
A supercharger connected to an exhaust manifold of the dual fuel host;
an exhaust gas pipeline connected to the air outlet of the supercharger;
the tail end of the return air pipeline is connected to the air inlet of the supercharger;
the exhaust pipe is provided with a first proportional regulating valve group, the return pipe is provided with a cooling tower for cooling waste gas and a second proportional regulating valve group for controlling the amount of waste gas entering the return pipe, the second proportional regulating valve group is arranged on a pipeline on the air inlet side of the cooling tower, the return pipe is also provided with a return air back pressure valve for regulating the back pressure of waste gas and the flow of waste gas flowing back into the supercharger, and the waste gas flowing back into the supercharger is mixed with fresh air in the supercharger and enters the dual-fuel host machine for secondary combustion after being boosted.
Preferably, the opening of the second proportional regulating valve group is 100% when the dual-fuel main engine (1) is loaded at 85%.
Preferably, when the opening of the second proportional control valve group is 100%, the valve opening of the first proportional control valve group is 50%.
Preferably, the first proportional regulating valve group and the second proportional regulating valve group each comprise an exhaust back pressure valve and an opening regulating valve.
Preferably, the exhaust gas pipeline is further provided with an exhaust gas boiler, and the exhaust gas boiler is used for generating steam by using heat of the exhaust gas to cool the exhaust gas and delivering the steam to the ship fuel system to heat a user.
Preferably, the exhaust pipeline and the return pipeline are respectively provided with a pressure sensor for monitoring pipeline pressure, the pressure sensors are connected with a ship monitoring system, and the ship monitoring system controls the valve opening proportion of the corresponding proportion regulating valve group according to pressure signals detected by the pressure sensors.
Preferably, a temperature sensor for monitoring the air temperature at the air inlet side of the cooling tower is further installed on the return air pipeline, the temperature sensor is connected with a ship monitoring system, and the ship monitoring system controls the temperature and the flow of the cooling fresh water of the cooling tower according to a temperature signal detected by the temperature sensor.
Preferably, the supercharger is at least provided with one, and the number of the superchargers is determined according to the number of cylinders and the power of the dual-fuel host.
A method for recycling waste gas by utilizing a ship host waste gas recycling system specifically comprises the following steps:
s1, fuel gas is compressed and detonated in a dual-fuel host to generate waste gas, the waste gas enters a supercharger through an exhaust header to be supercharged, and the supercharged waste gas flows into a waste gas pipeline;
s2, controlling the opening of a valve of the second proportion regulating valve group according to the running condition of the dual-fuel host, so that the waste gas with corresponding proportion flow in the waste gas pipeline flows into the return air pipeline, and other waste gas flows into the exhaust pipeline and is discharged to the outside atmosphere;
s3, the waste gas in the return air pipeline flows back to the supercharger, is mixed with fresh air in the supercharger, and enters the dual-fuel host machine for secondary combustion after being supercharged.
Preferably, the valve opening of the second proportional regulating valve group is 50%, and one half of the flow of the exhaust gas in the exhaust gas pipeline flows into the return air pipeline, and the other half of the flow of the exhaust gas flows into the exhaust gas pipeline and is discharged to the outside atmosphere.
The beneficial effects of the invention are as follows:
1. the invention burns CH by the dual-fuel host in GAS mode 4 The generated waste gas is discharged into a waste gas pipeline through a supercharger, 50% of the waste gas enters the return air pipeline by controlling a ratio regulating valve group on the exhaust pipeline and the return air pipeline which are connected in parallel with the waste gas pipeline, is cooled by a cooling tower on the return air pipeline and then returns to the supercharger, and enters a dual-fuel host machine for secondary combustion after reaching the optimal mixing ratio with fresh air in the supercharger, thereby realizing the maximization of combustion efficiency and improving CH 4 Is used for combustion.
2. The invention can reduce the energy consumption of the diesel engine in the GAS mode, effectively improve the economy of the diesel engine and prevent a large amount of CH simultaneously by fully utilizing the fuel GAS which is not fully combusted in the waste GAS and returning the fuel GAS to the diesel engine for secondary combustion after cooling 4 The escape to the atmosphere generates a greenhouse effect, which is beneficial to environmental protection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the marine main engine exhaust gas recycling system of the present invention.
FIG. 2 is a flow chart of a method for recycling marine main engine exhaust gas.
The meaning of the reference numerals in the figures is:
1 is a dual-fuel main engine, 2 is an exhaust header, 3 is a supercharger, 4 is an exhaust pipeline, 5 is an exhaust pipeline, 6 is a return air pipeline, 7 is a cooling tower, 8 is a return air back pressure valve, 9 is an exhaust gas boiler, 10 is a pressure sensor, 11 is a temperature sensor, 12 is an exhaust back pressure valve, and 13 is an opening regulating valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that, although the terms first, second, third, etc. may be used in this disclosure to describe various information, these information should not be limited to these terms, but rather should not be construed as indicating or implying any relative importance. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.
In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.
For a better understanding of the technical solution of the present invention, the following detailed description of the present invention refers to the accompanying drawings.
The invention provides a ship main engine waste gas recycling system which comprises a double-fuel main engine 1, a booster 3, a waste gas pipeline 4, an exhaust pipeline 5, a return air pipeline 6 and a cooling tower 7.
The dual fuel host 1 causes CH in GAS mode 4 Exhaust gas produced after compression combustion in the combustion chamber thereof, but containing a certain amount of insufficiently combusted CH 4 . Containing a certain amount of insufficiently combusted CH 4 Is discharged from the exhaust header 2 of the dual fuel host 1 into the supercharger 3.
The supercharger 3 is connected with the exhaust manifold 2 of the dual-fuel host 1, and the supercharger 3 is used for pressurizing the received exhaust gas. At least one supercharger 3 may be connected to the exhaust manifold 2 of the dual-fuel main engine 1, and the number of the superchargers 3 is determined according to the number of cylinders and the power of the dual-fuel main engine 1, and if a plurality of superchargers 3 are provided, the plurality of superchargers 3 are connected to the exhaust manifold 2 in parallel. In this embodiment, the dual-fuel host 1 is a nine-cylinder two-stroke dual-fuel diesel engine.
The exhaust pipeline 4 is connected to the air outlet of the supercharger 3, the exhaust pipeline 5 and the return pipeline 6 are connected in parallel to the tail end of the exhaust pipeline 4, the exhaust pipeline 4 is used for conveying exhaust gas to the exhaust pipeline 5 and the return pipeline 6, the exhaust gas flowing into the exhaust pipeline 5 is finally discharged to the outside atmosphere through the pipeline, the exhaust gas flowing into the return pipeline 6 enters the supercharger 3 through the pipeline, is mixed with fresh air in the supercharger 3 and then is sent into the dual-fuel host 1 for secondary combustion, and the oxygen content of the mixed gas is reduced and CH because the exhaust gas does not contain oxygen 4 The combustion process becomes slower and more complete.
The exhaust pipeline 5 is provided with a first proportional regulating valve group, the return pipeline 6 is provided with a second proportional regulating valve group, the first proportional regulating valve group is used for controlling the flow of the exhaust gas flowing into the exhaust pipeline 5 through the adjustment of the valve opening, and the second proportional regulating valve group is used for controlling the flow of the exhaust gas flowing into the return pipeline 6 through the adjustment of the valve opening.
The valve opening of the second proportional regulating valve group is determined according to the load of the dual-fuel host, and the valve opening of the first proportional regulating valve group is determined according to the valve opening of the second proportional regulating valve group.
Specifically, the opening of the second proportional regulating valve group is 100% when the dual-fuel main engine (1) is subjected to 85% load.
And when the opening of the second proportional regulating valve group is 100%, the valve opening of the first proportional regulating valve group is 50%.
The first proportional regulating valve group and the second proportional regulating valve group both comprise an exhaust back pressure valve BPV and an opening regulating valve SOV, the exhaust back pressure valve BPV and the opening regulating valve SOV are proportional regulating valves, and the valve opening of the exhaust back pressure valve BPV and the opening regulating valve SOV is regulated, so that exhaust gas flow with a specific proportion can be recycled to the return air pipeline 6 while exhaust back pressure is met, and secondary combustion is realized.
Preferably, in this embodiment, the valve opening of the exhaust back pressure valve BPV is opened to 50%, and the opening regulating valve SOV is opened entirely, so that half of the exhaust gas in the exhaust gas line 4 flows into the return line 6, and the other half of the exhaust gas is discharged to the atmosphere through the exhaust line 5. The amount of exhaust gas flowing back into the supercharger 3 through the return air pipeline 6 reaches the optimal ratio with the fresh air in the supercharger 3, so that the combustion efficiency is maximized.
The tail end of the return air pipeline 6 is connected to the air inlet of the supercharger 3, and can send the waste gas back into the supercharger 3, mix with the fresh air in the supercharger 3 and send into the dual-fuel host 1 for secondary combustion. The cooling tower 7 for cooling the exhaust gas is arranged on the return air pipeline 6, the cooling tower 7 is connected with a ship fresh water cooling system, the exhaust gas can be cooled by using cooling fresh water, the exhaust gas is cooled to about 50 ℃, then flows back to the supercharger 3 to be mixed with fresh air, and finally is sent into the dual-fuel host machine 1 for secondary combustion.
The second proportion regulating valve group is arranged on a pipeline on the air inlet side of the cooling tower 7, a return air back pressure valve 8 for regulating the back pressure of waste gas and the flow rate of waste gas flowing back into the supercharger 3 is further arranged on the return air pipeline 6, and the return air back pressure valve 8 is arranged on a pipeline section of the return air pipeline 6, which is close to the air return opening of the supercharger 3.
Preferably, the exhaust pipeline 5 and the return pipeline 6 are respectively provided with a pressure sensor 10 for monitoring pipeline pressure, the pressure sensors 10 are connected with a ship monitoring system, and the ship monitoring system controls the valve opening proportion of the corresponding proportion regulating valve group according to pressure signals detected by the pressure sensors 10.
Preferably, the return air pipeline 6 is also provided with a temperature sensor 11 for monitoring the gas temperature at the air inlet side and the air outlet side of the cooling tower 7, the temperature sensor 11 is connected with a ship monitoring system, and the ship monitoring system controls the temperature and the flow of the cooling fresh water of the cooling tower 7 according to the temperature signal detected by the temperature sensor 11.
Preferably, the exhaust gas pipeline 4 is further provided with an exhaust gas boiler 9, and the exhaust gas boiler 9 is used for generating steam by utilizing the heat of the exhaust gas to convey the steam to a ship fuel system so as to heat a user, so that the use of the fuel boiler can be reduced, and the fuel can be saved; meanwhile, the exhaust gas boiler 9 can cool the exhaust gas by utilizing the process of generating steam by the exhaust gas, thereby improving the cooling efficiency of the exhaust gas.
In the embodiment, the exhaust pipeline and the accessories are all made of Q235-A welded steel pipes; the return air pipeline and the accessory are made of SUS 316L welded steel pipes; other components are in accordance with manufacturer standards.
After the actual ship is used, the invention achieves the purpose of reducing CH by recycling the secondary combustion of the waste gas of the main engine 4 The escape purpose is to reduce the energy consumption of the dual-fuel host and improve the economical efficiency of ship operation. The system has the advantages of simple structure, convenient pipeline arrangement and strong implementation.
The invention also provides a method for recycling the waste gas by using the ship host waste gas recycling system, which specifically comprises the following steps:
s1, fuel gas is compressed and detonated in a dual-fuel host 1 to generate waste gas, the waste gas enters a supercharger 3 through an exhaust header 2 to be supercharged, and the supercharged waste gas flows into a waste gas pipeline 4;
s2, controlling the opening of a valve of a second proportion regulating valve group according to the running condition of the dual-fuel host 1, so that the waste gas with corresponding proportion flow in the waste gas pipeline 4 flows into the return air pipeline 6, and the other waste gas flows into the exhaust pipeline 5 and is discharged to the outside atmosphere;
s3, the waste gas in the return air pipeline 6 flows back to the supercharger 3, is mixed with fresh air in the supercharger, and enters the dual-fuel host machine 1 for secondary combustion after being supercharged.
The valve opening of the second proportion regulating valve group is 50%, and half of the flow of waste gas in the waste gas pipeline 4 flows into the return air pipeline 6, and the other half of the flow of waste gas flows into the exhaust pipeline 5 and is discharged to the outside atmosphere.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a boats and ships host computer waste gas recovery system of recycling which characterized in that includes
A dual-fuel main engine (1),
A supercharger (3) connected to the exhaust manifold (2) of the dual fuel host (1);
an exhaust gas pipeline (4) connected to the air outlet of the supercharger (3);
the tail end of the return air pipeline (6) is connected to the air inlet of the supercharger (3);
the exhaust pipeline (5) is provided with a first proportional regulating valve group, the return pipeline (6) is provided with a cooling tower (7) for cooling waste gas and a second proportional regulating valve group for controlling the amount of waste gas entering the return pipeline (6), the second proportional regulating valve group is arranged on a pipeline on the air inlet side of the cooling tower (7), the return pipeline (6) is also provided with a return air back pressure valve (8) for regulating the back pressure of waste gas and the flow of waste gas flowing back into the supercharger (3), and the waste gas flowing back into the supercharger (3) is mixed with fresh air in the supercharger and enters the dual-fuel host machine (1) for secondary combustion after being supercharged.
2. The marine main engine exhaust gas recovery and reuse system according to claim 1, characterized in that the second proportional regulating valve group has an opening of 100% at 85% load of the dual fuel main engine (1).
3. The marine main engine exhaust gas recovery and reuse system according to claim 1, wherein when the opening of the second proportional control valve group is 100%, the valve opening of the first proportional control valve group is 50%.
4. A marine main engine exhaust gas recovery and reuse system according to claim 1 or 3, wherein the first and second proportional valve groups each comprise an exhaust back pressure valve and an opening degree regulating valve.
5. The marine main engine exhaust gas recycling system according to claim 1, wherein the exhaust gas pipeline (4) is further provided with an exhaust gas boiler (9), and the exhaust gas boiler (9) is used for generating steam by using heat of the exhaust gas to cool the exhaust gas and delivering the steam to a marine fuel system to heat a user.
6. The ship main engine waste gas recycling system according to claim 1, wherein the exhaust pipeline (5) and the return pipeline (6) are provided with pressure sensors (10) for monitoring pipeline pressure, the pressure sensors (10) are connected with a ship monitoring system, and the ship monitoring system controls the valve opening proportion of the corresponding proportion regulating valve group according to pressure signals detected by the pressure sensors (10).
7. The marine main engine exhaust gas recycling system according to claim 1, wherein the return air pipeline (6) is further provided with a temperature sensor (11) for monitoring the gas temperature at the gas inlet side of the cooling tower (7), the temperature sensor (11) is connected with a marine monitoring system, and the marine monitoring system controls the temperature and the flow of the cooling fresh water of the cooling tower (7) according to the temperature signal detected by the temperature sensor (11).
8. The marine main engine exhaust gas recycling system according to claim 1, wherein the supercharger (3) is provided with at least one, and the number of the superchargers (3) is determined according to the number of cylinders and the power of the dual fuel main engine (1).
9. A method for recovering exhaust gas by using the marine main engine exhaust gas recovery and reuse system according to any one of claims 1 to 8, characterized by comprising the following steps:
s1, fuel gas is compressed and detonated in a dual-fuel host machine (1) to generate waste gas, the waste gas enters a supercharger (3) through an exhaust header (2) to be supercharged, and the supercharged waste gas flows into a waste gas pipeline (4);
s2, controlling the opening of a valve of a second proportion regulating valve group according to the running condition of the dual-fuel host machine (1), so that the waste gas with corresponding proportion flow in the waste gas pipeline (4) flows into the return air pipeline (6), and the other waste gas flows into the exhaust pipeline (5) and is discharged to the outside atmosphere;
s3, the waste gas in the return air pipeline (6) flows back to the supercharger (3), is mixed with fresh air in the supercharger, and enters the dual-fuel main engine (1) for secondary combustion after being supercharged.
10. The method for recycling waste gas by utilizing the marine main engine waste gas recycling system according to claim 9, wherein the valve opening of the second proportional regulating valve group is 50%, and half flow of waste gas in the waste gas pipeline (4) flows into the return air pipeline (6), and the other half flow of waste gas flows into the exhaust pipeline (5) and is discharged to the external atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311483323.6A CN117404174A (en) | 2023-11-09 | 2023-11-09 | System and method for recycling waste gas of ship main engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311483323.6A CN117404174A (en) | 2023-11-09 | 2023-11-09 | System and method for recycling waste gas of ship main engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117404174A true CN117404174A (en) | 2024-01-16 |
Family
ID=89486977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311483323.6A Pending CN117404174A (en) | 2023-11-09 | 2023-11-09 | System and method for recycling waste gas of ship main engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117404174A (en) |
-
2023
- 2023-11-09 CN CN202311483323.6A patent/CN117404174A/en active Pending
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