CN114017209B - Purging method for fuel gas in fuel gas pipeline of marine dual-fuel host - Google Patents
Purging method for fuel gas in fuel gas pipeline of marine dual-fuel host Download PDFInfo
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- CN114017209B CN114017209B CN202111286240.9A CN202111286240A CN114017209B CN 114017209 B CN114017209 B CN 114017209B CN 202111286240 A CN202111286240 A CN 202111286240A CN 114017209 B CN114017209 B CN 114017209B
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- valve element
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- ventilation
- host
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- 239000002737 fuel gas Substances 0.000 title claims abstract description 44
- 238000010926 purge Methods 0.000 title claims abstract description 38
- 239000000446 fuel Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000007789 gas Substances 0.000 claims abstract description 77
- 238000009423 ventilation Methods 0.000 claims abstract description 45
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000013022 venting Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001960 triggered effect Effects 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0613—Switch-over from one fuel to another
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0236—Multi-way valves; Multiple valves forming a multi-way valve system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The purging method of the fuel gas in the fuel gas pipeline of the marine dual-fuel host machine, wherein the fuel gas pipeline is connected with a ventilation and fuel gas purging system, and the purging method comprises the following steps: in the normal conversion of the combustion mode or in the normal emergency stop state, the gas in the gas pipeline is discharged in a ventilation mode, and in the artificial emergency stop state, the gas in the gas pipeline is discharged in a high-pressure nitrogen purging mode; the venting and gas purging system includes a first valve member, a nitrogen inlet valve, a venting valve, a flow meter, a fifth valve member, a sixth valve member, a three-way valve, an eighth valve member, and a ninth valve member. The invention realizes that the gas in the gas pipeline is cleared out in time under the three working states of normal conversion of the combustion mode, artificial emergency stop and normal emergency stop of the host gas system, and ensures the safe operation of the dual-fuel host gas system.
Description
Technical Field
The invention relates to a marine dual-fuel host, in particular to a purging method for fuel gas in a fuel gas pipeline of the marine dual-fuel host, and belongs to the technical field of marine diesel engines.
Background
In the pipeline of the dual-fuel host for the high-power ship, the double-wall pipe is used for conveying fuel gas for the host. In the operation process of the host, when the combustion mode of the host is changed from a fuel mode to a fuel mode, fuel gas in the fuel gas pipeline should be discharged out of the pipeline in time, so that the potential safety hazard of the combustible gas in the pipeline under a certain condition is avoided. When the host combustion mode is switched from the fuel mode to the fuel mode again, the double-wall pipe is filled with combustible gas again. In order to ensure that the gas system of the dual-fuel host can safely operate, the problem of timely clearing residual gas in the gas pipeline must be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a purging method for fuel gas in a fuel gas pipeline of a marine dual-fuel host machine, which realizes the conversion of a normal operation combustion mode of the host machine, the free ventilation during normal parking and the fuel gas purging during an emergency parking state and ensures the safe operation of a fuel gas system of the dual-fuel host machine.
The technical scheme of the invention is as follows:
the utility model provides a method for purging gas in marine dual fuel host gas pipeline, the gas pipeline comprises double-walled pipe and is connected with ventilative and gas purging system, its characterized in that: the purging method comprises the following steps: and in the normal conversion state or the normal emergency stop state of the combustion mode, the gas in the gas pipeline is discharged in a ventilation mode, and in the artificial emergency stop state, the gas in the gas pipeline is discharged in a high-pressure nitrogen purging mode.
Further, the ventilation and gas purging system comprises a first valve element, a nitrogen inlet valve, a ventilation valve, a flowmeter, a fifth valve element, a sixth valve element, a three-way valve, an eighth valve element and a ninth valve element; the first valve element, the flowmeter, the fifth valve element, the eighth valve element and the host are sequentially connected, the nitrogen inlet valve and the ventilation valve are connected to the joint of the first valve element and the flowmeter, the three-way valve is connected to the joint of the fifth valve element and the eighth valve element through the sixth valve element, and the ninth valve element is connected to the joint of the eighth valve element and the host.
Further, the ventilation mode includes: closing the first valve element and the nitrogen inlet valve, opening the ventilation valve for ventilation, wherein the flowmeter is in a normally open state, and closing the fifth valve element and the sixth valve element to enable the fuel gas in the ventilation and fuel gas purging system pipeline to be ventilated and discharged through the ventilation valve; the three-way valve closes the nitrogen inlet and opens the other two ports, so that the fuel gas in the three-way valve is in a ventilation state; opening the eighth valve element and the ninth valve element to enable the ventilation and gas purging system pipeline in front of the host to be in a ventilation state; and an air inlet of a gas pipeline inside the host is closed, an air vent is opened, and the gas in the gas pipeline of the host is discharged.
Further, the high-pressure nitrogen purging mode comprises the following steps: closing the first valve element, opening the nitrogen inlet valve, closing the ventilation valve, keeping the flowmeter smooth, opening the fifth valve element and the eighth valve element, closing the sixth valve element and the ninth valve element, closing the nitrogen inlet of the three-way valve, inputting high-pressure nitrogen into the pipeline of the ventilation and gas purging system through the nitrogen inlet valve, and filling the high-pressure nitrogen into the gas pipeline of the host computer at a certain pressure to purge the gas in the gas pipeline.
Further, the pressure of the high-pressure nitrogen is 6-10bar.
Compared with the prior art, the invention has the following beneficial effects:
the invention realizes that the gas in the gas pipeline is cleared out in time under the three working states of normal conversion of the combustion mode, artificial emergency stop and normal emergency stop of the host gas system, and ensures the safe operation of the dual-fuel host gas system.
Drawings
FIG. 1 is a schematic diagram of the ventilation mode of the present invention.
FIG. 2 is a schematic diagram of a high pressure nitrogen purge mode of the present invention.
In the drawing the view of the figure,
1-first valve element, 2-nitrogen inlet valve, 3-ventilation valve, 4-flowmeter, 5-fifth valve element, 6-sixth valve element, 7-three-way valve, 8-eighth valve element, and 9-ninth valve element.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, which should not be construed as limiting the scope of the invention as claimed.
The invention is used for purging fuel gas in a fuel gas pipeline of a marine dual-fuel host, and the fuel gas in the double-wall pipe is purged after a host combustion mode is switched from a fuel gas mode to a fuel oil mode by using high-pressure inert gas nitrogen. The concentration of the combustible gas can be reduced for a small amount of combustible gas, and the chemical reaction of the combustible gas and other gases can be inhibited. The nitrogen gas is inert gas, and the nitrogen gas has relatively large storage quantity in the atmosphere.
The purging method comprises the following steps: and in the normal conversion state or the normal emergency stop state of the combustion mode, the gas in the gas pipeline is discharged in a ventilation mode, and in the artificial emergency stop state, the gas in the gas pipeline is discharged in a high-pressure nitrogen purging mode.
The gas pipe is composed of a double-wall pipe and is connected with a ventilation and gas purging system, referring to fig. 1, the ventilation and gas purging system comprises a first valve element 1, a nitrogen inlet valve 2, a ventilation valve 3, a flowmeter 4, a fifth valve element 5, a sixth valve element 6, a three-way valve 7, an eighth valve element 8 and a ninth valve element 9. The first valve element 1, the flowmeter 4, the fifth valve element 5, the eighth valve element 8 and the host are sequentially connected, the nitrogen inlet valve 2 and the ventilation valve 3 are connected to the joint of the first valve element 1 and the flowmeter 4, the three-way valve 7 is connected to the joint of the fifth valve element 5 and the eighth valve element 8 through the sixth valve element 6, and the ninth valve element 9 is connected to the joint of the eighth valve element 8 and the host.
The control of the fuel gas system of the dual-fuel host is divided into three working states, namely: the normal state of the combustion mode, the artificial emergency stop and the normal emergency stop state.
1. The normal conversion state of the combustion mode refers to the mutual switching of the fuel gas and fuel oil modes and the management of a main engine fuel gas system during normal parking, so that the fuel gas does not need to be purged at the moment, and the fuel gas in the fuel gas double-wall pipe system can be discharged out of a pipeline through an exhaust system in the fuel gas system.
The principle is shown in fig. 1: the first valve element 1 and the nitrogen inlet valve 2 are closed, the ventilation valve 3 is opened for ventilation, the flowmeter 4 is in a normally open state, the fifth valve element 5 and the sixth valve element 6 are closed, so that fuel gas in the illustrated pipeline can be ventilated through the ventilation valve 3, and the fuel gas is discharged. The three-way valve 7 closes the nitrogen inlet, and the other two ends are in an open state, so that the gas in the valve is in a ventilation state. The eighth valve element 8 and the ninth valve element 9 are opened, so that the pipeline between the pipeline of the section and the front part of the host is in a ventilation state. The gas inlet of the gas pipeline (double-wall pipe) inside the host is closed, and the gas vent is opened, so that the gas pipeline on the host can discharge the gas.
2. The manual emergency parking state: in an emergency stopping state under a certain dangerous condition or emergency state, for example, when the concentration of the combustible gas in the engine room is found to exceed the standard, or local fire occurs in the engine room, and other emergency conditions occur, the internal gas system of the host computer still works normally, but artificial emergency stopping is needed, and the gas in the internal gas system of the host computer needs to be discharged in an emergency. At the moment, the gas purging system is triggered, high-pressure nitrogen is filled into the gas pipeline, and the gas is discharged out of the host computer in an emergency mode, so that the damage to the gas system caused by external emergency conditions or unpredictable damage is avoided, and the safety of the host computer and personnel is ensured.
The working principle is shown in fig. 2: the first valve element 1 is closed, the nitrogen inlet valve 2 is opened, 7bar pressure nitrogen is filled into the pipeline system, the ventilation valve 3 is closed, the flowmeter 4 is unblocked, the fifth valve element 5 is opened, the sixth valve element 6 is closed, the air inlet of the three-way valve 7 is closed, the eighth valve element 8 is opened, the ninth valve element 9 is closed, and the whole fuel gas pipeline is in a unblocked state before the host machine. The nitrogen can be filled into the main engine gas pipeline at a certain pressure, and the gas in the main engine gas pipeline is flushed out in an emergency state, so that the safety of the main engine is ensured.
3. Normal emergency stop state: the system is in a normal working state, the gas system works normally, and the system is only in a state that the system is stopped due to faults of other systems or main equipment of the system, such as damage of a fan or a valve, low-pressure alarm of the lubricating oil system, normal stopping and the like.
The working principle is the same as that of the first combustion mode in normal conversion state, and the gas is discharged in a ventilation mode.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made according to the content of the present application should be considered to be within the technical scope of the present invention.
Claims (2)
1. The utility model provides a method for purging gas in marine dual fuel host gas pipeline, the gas pipeline comprises double-walled pipe and is connected with ventilative and gas purging system, its characterized in that: the purging method comprises the following steps: in a normal conversion state or a normal emergency stop state of a combustion mode, exhausting the fuel gas in the fuel gas pipeline in a ventilation mode, and in an artificial emergency stop state, exhausting the fuel gas in the fuel gas pipeline in a high-pressure nitrogen purging mode;
the ventilation and fuel gas purging system comprises a first valve element, a nitrogen inlet valve, a ventilation valve, a flowmeter, a fifth valve element, a sixth valve element, a three-way valve, an eighth valve element and a ninth valve element; the first valve element, the flowmeter, the fifth valve element, the eighth valve element and the host are sequentially connected, the nitrogen inlet valve and the ventilation valve are connected to the joint of the first valve element and the flowmeter, the three-way valve is connected to the joint of the fifth valve element and the eighth valve element through the sixth valve element, and the ninth valve element is connected to the joint of the eighth valve element and the host;
the ventilation mode comprises the following steps: closing the first valve element and the nitrogen inlet valve, opening the ventilation valve for ventilation, wherein the flowmeter is in a normally open state, and closing the fifth valve element and the sixth valve element to enable the fuel gas in the ventilation and fuel gas purging system pipeline to be ventilated and discharged through the ventilation valve; the three-way valve closes the nitrogen inlet and opens the other two ports, so that the fuel gas in the three-way valve is in a ventilation state; opening the eighth valve element and the ninth valve element to enable the ventilation and gas purging system pipeline in front of the host to be in a ventilation state; the air inlet of the gas pipeline inside the host is closed, the air vent is opened, and the gas in the gas pipeline of the host is discharged;
the high-pressure nitrogen purging mode comprises the following steps: closing the first valve element, opening the nitrogen inlet valve, closing the ventilation valve, keeping the flowmeter smooth, opening the fifth valve element and the eighth valve element, closing the sixth valve element and the ninth valve element, closing the nitrogen inlet of the three-way valve, inputting high-pressure nitrogen into the pipeline of the ventilation and gas purging system through the nitrogen inlet valve, and filling the high-pressure nitrogen into the gas pipeline of the host computer at a certain pressure to purge the gas in the gas pipeline.
2. The method for purging fuel gas in a fuel gas pipeline of a marine dual-fuel host as claimed in claim 1, wherein: the pressure of the high-pressure nitrogen is 6-10bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111286240.9A CN114017209B (en) | 2021-11-02 | 2021-11-02 | Purging method for fuel gas in fuel gas pipeline of marine dual-fuel host |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111286240.9A CN114017209B (en) | 2021-11-02 | 2021-11-02 | Purging method for fuel gas in fuel gas pipeline of marine dual-fuel host |
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| Publication Number | Publication Date |
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| CN114017209A CN114017209A (en) | 2022-02-08 |
| CN114017209B true CN114017209B (en) | 2024-02-02 |
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| CN202111286240.9A Active CN114017209B (en) | 2021-11-02 | 2021-11-02 | Purging method for fuel gas in fuel gas pipeline of marine dual-fuel host |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876629B (en) * | 2022-06-08 | 2023-06-30 | 安庆中船柴油机有限公司 | Purging device and method for fuel gas in fuel gas pipeline of marine dual-fuel host |
| CN115164100A (en) * | 2022-07-06 | 2022-10-11 | 上海中船三井造船柴油机有限公司 | Multifunctional gas supply control valve group and gas supply method for marine dual-fuel diesel engine |
| CN116357467B (en) * | 2023-04-20 | 2025-06-03 | 上海中船三井造船柴油机有限公司 | Multifunctional gas control device for dual fuel low speed diesel engine cylinders |
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| KR101441241B1 (en) * | 2013-04-24 | 2014-09-17 | 현대중공업 주식회사 | A Treatment System of Liquefied Natural Gas and Method for Treating Liquefied Natural Gas |
| DE102014014452A1 (en) * | 2014-09-26 | 2016-03-31 | L'orange Gmbh | Dual-fuel injector, method of execution with it, as well as dual-fuel fuel injection system |
| KR20160074910A (en) * | 2014-12-19 | 2016-06-29 | 삼성중공업 주식회사 | Fuel supply system |
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| CN113250863A (en) * | 2021-05-10 | 2021-08-13 | 河南柴油机重工有限责任公司 | High-pressure and pressure-stabilizing injection system of marine gas engine and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104863712A (en) * | 2014-02-21 | 2015-08-26 | 卡特彼勒发动机有限责任两合公司 | Detecting Misfiring In A Gaseous Fuel Operated Internal Combustion Engine |
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2021
- 2021-11-02 CN CN202111286240.9A patent/CN114017209B/en active Active
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| KR101441241B1 (en) * | 2013-04-24 | 2014-09-17 | 현대중공업 주식회사 | A Treatment System of Liquefied Natural Gas and Method for Treating Liquefied Natural Gas |
| DE102014014452A1 (en) * | 2014-09-26 | 2016-03-31 | L'orange Gmbh | Dual-fuel injector, method of execution with it, as well as dual-fuel fuel injection system |
| KR20160074910A (en) * | 2014-12-19 | 2016-06-29 | 삼성중공업 주식회사 | Fuel supply system |
| CN110461706A (en) * | 2017-03-24 | 2019-11-15 | 大宇造船海洋株式会社 | Ship gas discharge system, method for discharging gas and discharge Gas recovering method |
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| CN114017209A (en) | 2022-02-08 |
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