CN115573830A - Self-pressurization adjustable fuel gas supply system - Google Patents

Self-pressurization adjustable fuel gas supply system Download PDF

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Publication number
CN115573830A
CN115573830A CN202211270207.1A CN202211270207A CN115573830A CN 115573830 A CN115573830 A CN 115573830A CN 202211270207 A CN202211270207 A CN 202211270207A CN 115573830 A CN115573830 A CN 115573830A
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CN
China
Prior art keywords
pipeline
temperature
gas
vaporizer
pressure
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.)
Pending
Application number
CN202211270207.1A
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Chinese (zh)
Inventor
满亮
方云虎
陈远
姜宏波
李晓晨
吴海荣
吕康
汤小九
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Merchants Jinling Dingheng Shipping Yangzhou Co ltd
Original Assignee
China Merchants Jinling Dingheng Shipping Yangzhou Co ltd
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 China Merchants Jinling Dingheng Shipping Yangzhou Co ltd filed Critical China Merchants Jinling Dingheng Shipping Yangzhou Co ltd
Priority to CN202211270207.1A priority Critical patent/CN115573830A/en
Publication of CN115573830A publication Critical patent/CN115573830A/en
Pending legal-status Critical Current

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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
    • 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
    • F02D19/02—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 gaseous fuels
    • F02D19/021—Control of components of the fuel supply system
    • F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
    • 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
    • F02D19/02—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 gaseous fuels
    • F02D19/021—Control of components of the fuel supply system
    • F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
    • 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
    • F02D19/02—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 gaseous fuels
    • F02D19/025—Failure diagnosis or prevention; Safety measures; Testing
    • 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
    • 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
    • F02M21/0293—Safety devices; Fail-safe measures
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a self-pressurization adjustable fuel gas supply system. This adjustable type gas feed system from pressure boost includes storage tank and vaporizer, the LNG import of vaporizer downside communicates to the bottom of storage tank through the third pipeline, the gas exit linkage of vaporizer downside has the fourth pipeline for the gas engine air feed, the water inlet of vaporizer has river water cooling system through fifth pipe connection, be provided with liquid phase air feed governing valve on the third pipeline, be provided with pressure monitoring sensor and temperature monitoring sensor on the fourth pipeline, be provided with temperature regulation valve on the fifth pipeline, pressure monitoring sensor and liquid phase air feed governing valve are connected with the liquid phase PID controller, temperature monitoring sensor and temperature regulation valve are connected with the temperature PID controller. The invention solves the problem that shutdown faults of a gas engine caused by over standard temperature and pressure due to the fact that gas pressure and temperature cannot be adjusted in the prior art and great potential safety hazards are brought to navigation.

Description

Self-pressurization adjustable fuel gas supply system
Technical Field
The invention relates to the field of shipbuilding, in particular to a self-pressurization adjustable fuel gas supply system.
Background
The existing inland ship usually uses a self-pressurization gas supply system to supply gas for a plurality of gas engines at the same time, and gas vaporizers in the supply system are all designed according to full load and use river water as a gasification medium. However, with the change of the environment and the temperature of river water and the change of the load of the main engine (acceleration, deceleration and other conditions), when a single gas engine runs, the shutdown fault of the gas engine caused by the fact that the pressure and the temperature of the system are too high due to uncontrollable pressure and temperature often occurs, and great potential safety hazard is brought to navigation.
Disclosure of Invention
The invention aims to provide a self-pressurization adjustable gas supply system which can avoid the shutdown fault of a gas engine by controlling the gas pressure and the temperature so as to eliminate the potential safety hazard of navigation, aiming at the defects in the prior art.
In order to realize the purpose, the self-pressurization adjustable fuel gas supply system adopts the technical scheme that:
the utility model provides a self-boosting adjustable fuel gas supply system, includes storage tank and vaporizer, and the LNG import of vaporizer upside communicates to the bottom of storage tank through first pipeline, and the gas export of vaporizer upside communicates to the top of storage tank through the second pipeline, and the LNG import of vaporizer downside communicates to the bottom of storage tank through the third pipeline, and the gas exit linkage of vaporizer downside has the fourth pipeline for the gas engine air feed, and the water inlet of vaporizer has river water cooling system through fifth pipe connection, be provided with liquid phase air feed governing valve on the third pipeline, be provided with pressure monitoring sensor and temperature monitoring sensor on the fourth pipeline, be provided with temperature regulating valve on the fifth pipeline, pressure monitoring sensor and liquid phase air feed governing valve are connected with liquid phase PID controller, and temperature monitoring sensor and temperature regulating valve are connected with temperature PID controller.
Preferably, the third pipeline is provided with a sixth pipeline communicated to the top of the storage tank, a connection point of the sixth pipeline and the third pipeline is located between the liquid-phase gas supply regulating valve and the vaporizer, the sixth pipeline is provided with a gas-phase gas supply regulating valve, and the gas-phase gas supply regulating valve and the pressure monitoring sensor are connected with a gas-phase PID controller.
Preferably, a pressure alarm sensor and a temperature alarm sensor are arranged on the fourth pipeline.
Preferably, a buffer tank for stabilizing pressure is arranged on the fourth pipeline, the pressure alarm sensor, the temperature alarm sensor and the temperature monitoring sensor are positioned on one side of an air inlet of the buffer tank, and the pressure monitoring sensor is positioned on one side of an air outlet of the buffer tank.
Compared with the prior art, the invention has the following advantages:
the liquid phase PID controller compares a feedback signal of the pressure monitoring sensor with a preset target pressure, and outputs an execution signal to an actuator of the liquid phase gas supply regulating valve so as to regulate the opening of the liquid phase gas supply regulating valve and control the flow of LNG entering the vaporizer, thereby controlling the gas pressure to be consistent with the target pressure; the gas phase PID controller compares a feedback signal of the pressure monitoring sensor with a preset target pressure, and outputs an execution signal to an actuator of the gas phase gas supply regulating valve so as to regulate the opening of the gas phase gas supply regulating valve and control the flow of BOG entering the vaporizer, thereby controlling the gas pressure to be consistent with the target pressure; the temperature PID controller compares the feedback signal of the temperature monitoring sensor with a preset target temperature, and outputs an execution signal to an actuator of the temperature regulating valve so as to regulate the opening of the temperature regulating valve and control the flow of a heating medium (river water after cooling the generator) entering the vaporizer, thereby controlling the temperature of the fuel gas to be consistent with the target temperature. The pressure and the temperature of the fuel gas in the system are controlled by the method, the shutdown fault of the fuel gas engine is avoided, and the potential safety hazard of navigation is eliminated.
Drawings
Fig. 1 is a schematic diagram of a self-supercharging adjustable gas supply system.
FIG. 2 is a schematic illustration of the operation of liquid phase gas supply;
FIG. 3 is a schematic diagram of the operation of gas phase gas supply.
The gas engine comprises a storage tank 1, a vaporizer 2, a first pipeline 3, a second pipeline 4, a third pipeline 5, a liquid phase gas supply regulating valve 6, a sixth pipeline 7, a gas phase gas supply regulating valve 8, a gas engine 9, a fourth pipeline 10, a pressure monitoring sensor 11, a temperature monitoring sensor 12, a pressure alarm sensor 13, a temperature alarm sensor 14, a buffer tank 15, a fifth pipeline 16, a temperature regulating valve 17, a temperature PID controller 18, a liquid phase PID controller 19 and a gas phase PID controller 20.
Detailed Description
The present invention is further illustrated in the accompanying drawings and detailed description, it is to be understood that such embodiments are merely illustrative of and not restrictive on the broad invention, and that various equivalent modifications of the invention shall fall within the scope of the appended claims after reading this disclosure.
As shown in fig. 1-3, a self-pressurization and adjustable fuel gas supply system comprises a storage tank 1 and a vaporizer 2, wherein an LNG inlet on the upper side of the vaporizer is communicated to the bottom of the storage tank through a first pipeline 3, a fuel gas outlet on the upper side of the vaporizer is communicated to the top of the storage tank through a second pipeline 4, so as to form a self-pressurization loop, an LNG inlet on the lower side of the vaporizer is communicated to the bottom of the storage tank through a third pipeline 5, a liquid-phase gas supply regulating valve 6 is installed on the third pipeline, the third pipeline is communicated with a sixth pipeline 7, the connection point of the sixth pipeline and the third pipeline is positioned between the liquid-phase gas supply regulating valve and the vaporizer, the sixth pipeline is communicated to the top of the storage tank, a gas-phase gas supply regulating valve 8 is installed on the sixth pipeline, and a fuel gas outlet on the lower side of the vaporizer is connected to a fourth pipeline 10 for supplying gas to a gas engine 9, the fourth pipeline is provided with a pressure monitoring sensor 11, a temperature monitoring sensor 12, a pressure alarm sensor 13, a temperature alarm sensor 14 and a buffer tank 15 for stabilizing pressure, the pressure alarm sensor, the temperature alarm sensor and the temperature monitoring sensor are positioned at one side of an air inlet of the buffer tank, the pressure monitoring sensor is positioned at one side of an air outlet of the buffer tank, a water inlet of the vaporizer is connected with a river water cooling system through a fifth pipeline 16 and used for cooling river water of the gas engine into a heating medium of the vaporizer, the fifth pipeline is provided with a temperature regulating valve 17, the temperature regulating valve and the temperature monitoring sensor are connected with a temperature PID controller 18, the pressure monitoring sensor and the liquid phase regulating valve are connected with a liquid phase PID controller 19, the gas phase regulating valve and the pressure monitoring sensor are connected with a gas phase PID controller 20, and the models of the temperature PID controller, the liquid phase PID controller and the gas phase PID controller are OMRON E5DC digital regulators.
The method for automatically regulating the pressure of the liquid-phase fuel gas comprises the following steps:
s1, setting the valve action of a liquid-phase gas supply regulating valve: when FGSS inputs 4-20 mA to a valve actuator of the liquid phase gas supply regulating valve, 4mA corresponds to the maximum opening degree of the valve, 12mA corresponds to 50% opening degree of the valve, and 20mA corresponds to the minimum opening degree of the valve;
s2, setting a target pressure SPv of the liquid phase PID controller:
a. setting a minimum value Mv for the liquid phase PID controller, wherein the gas pressure is the minimum pressure required by the gas engine to maintain work under the valve opening of the liquid phase gas supply regulating valve corresponding to the Mv;
b. observing the numerical value of the liquid phase PID controller, wherein the larger the output value is (the smaller the valve opening degree is), the smaller the feedback signal value of the pressure monitoring sensor is required to be; the smaller the output value (the smaller the valve opening), the larger the feedback signal value of the pressure monitoring sensor should be;
c. b, setting a target pressure SPv of the liquid phase PID controller according to the optimal gas pressure value required by the gas engine after the output value of the liquid phase PID controller meets the change rule in the step b;
d. observing the numerical value of the pressure monitoring sensor, setting a liquid-phase PID controller for self-setting, and storing data after the setting is finished;
and S3, the pressure monitoring sensor transmits a feedback signal FPv to the liquid phase PID controller, the liquid phase PID controller compares the FPv with the SPv and then calculates and outputs Mv, and an actuator of the liquid phase gas supply regulating valve regulates the opening of the valve according to the Mv and regulates the gas pressure to the optimal gas pressure value required by the gas engine.
The method for automatically adjusting the gas-phase gas pressure and the gas temperature is the same as the method for automatically adjusting the liquid-phase gas pressure, and the details are not repeated.

Claims (4)

1. The utility model provides a from adjustable nodal pattern gas feed system of pressure boost, includes storage tank and vaporizer, and the LNG import of vaporizer upside communicates to the bottom of storage tank through first pipeline, and the gas export of vaporizer upside communicates to the top of storage tank through the second pipeline, and the LNG import of vaporizer downside communicates to the bottom of storage tank through the third pipeline, and the gas exit linkage of vaporizer downside has the fourth pipeline for the gas engine air feed, and the water inlet of vaporizer has river water cooling system, its characterized in that through fifth pipe connection: the liquid phase gas supply regulating valve is arranged on the third pipeline, the pressure monitoring sensor and the temperature monitoring sensor are arranged on the fourth pipeline, the temperature regulating valve is arranged on the fifth pipeline, the pressure monitoring sensor and the liquid phase gas supply regulating valve are connected with a liquid phase PID controller, and the temperature monitoring sensor and the temperature regulating valve are connected with a temperature PID controller.
2. The self-pressurizing adjustable gas supply system according to claim 1, wherein: the third pipeline is provided with a sixth pipeline communicated to the top of the storage tank, a connection point of the sixth pipeline and the third pipeline is located between the liquid-phase gas supply regulating valve and the vaporizer, the sixth pipeline is provided with a gas-phase gas supply regulating valve, and the gas-phase gas supply regulating valve and the pressure monitoring sensor are connected with a gas-phase PID controller.
3. The self-boosting, adjustable gas supply system according to claim 1, wherein: and a pressure alarm sensor and a temperature alarm sensor are arranged on the fourth pipeline.
4. The self-pressurizing adjustable gas supply system according to claim 3, wherein: and a buffer tank for stabilizing the pressure is arranged on the fourth pipeline, the pressure alarm sensor, the temperature alarm sensor and the temperature monitoring sensor are positioned on one side of an air inlet of the buffer tank, and the pressure monitoring sensor is positioned on one side of an air outlet of the buffer tank.
CN202211270207.1A 2022-10-18 2022-10-18 Self-pressurization adjustable fuel gas supply system Pending CN115573830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211270207.1A CN115573830A (en) 2022-10-18 2022-10-18 Self-pressurization adjustable fuel gas supply system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211270207.1A CN115573830A (en) 2022-10-18 2022-10-18 Self-pressurization adjustable fuel gas supply system

Publications (1)

Publication Number Publication Date
CN115573830A true CN115573830A (en) 2023-01-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211270207.1A Pending CN115573830A (en) 2022-10-18 2022-10-18 Self-pressurization adjustable fuel gas supply system

Country Status (1)

Country Link
CN (1) CN115573830A (en)

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