CN114776488A - Marine natural gas and ammonia dual-purpose energy supply system - Google Patents
Marine natural gas and ammonia dual-purpose energy supply system Download PDFInfo
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- CN114776488A CN114776488A CN202210427781.7A CN202210427781A CN114776488A CN 114776488 A CN114776488 A CN 114776488A CN 202210427781 A CN202210427781 A CN 202210427781A CN 114776488 A CN114776488 A CN 114776488A
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 185
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 152
- 239000003345 natural gas Substances 0.000 title claims abstract description 81
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 55
- 238000003860 storage Methods 0.000 claims abstract description 80
- 239000000446 fuel Substances 0.000 claims abstract description 54
- 239000007789 gas Substances 0.000 claims abstract description 50
- 238000011084 recovery Methods 0.000 claims abstract description 29
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 239000002737 fuel gas Substances 0.000 claims abstract description 9
- 239000000523 sample Substances 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 239000007791 liquid phase Substances 0.000 claims description 25
- 239000012071 phase Substances 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 10
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 239000003949 liquefied natural gas Substances 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 229940079593 drug Drugs 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0206—Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide
-
- 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
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
-
- 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
- F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
-
- 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
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0239—Pressure or flow regulators therefor
-
- 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
- F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief valves
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a dual-purpose energy supply system for natural gas and ammonia gas for ships, which comprises a fuel storage system, a fuel gas supply system, a gas recovery system and a safety discharge system, wherein the fuel storage system is used for storing fuel gas; the fuel storage system comprises a storage tank, a probe is arranged in the storage tank and connected with a monitoring system of a central control room, and a heat insulation layer is arranged outside the storage tank; the fuel gas supply system comprises a natural gas supply system and a liquid ammonia supply system; the gas recovery system comprises a recovery pipeline arranged at the front end of the heater, the recovery pipeline is sequentially connected with a compressor, a cooler and an ammonia liquefying device, and a recovery gas phase root valve is arranged between the ammonia liquefying device and the storage tank; the safety relief system comprises a relief pipeline arranged at the storage tank relief port, and the relief pipeline is sequentially connected with a relief device, an ammonia treatment device and a ventilating mast. After the ammonia fuel host is replaced, the new host can be supplied with energy without replacing a proper storage tank and an energy supply system, so that the replacement cost is reduced, and the use of new energy is promoted.
Description
Technical Field
The invention relates to the field of ship construction, in particular to a dual-purpose energy supply system for natural gas and ammonia gas for ships.
Background
Due to the high-speed development of the past industry, the emission of carbon dioxide is increasingly serious, the greenhouse effect is more obvious, the emission of carbon dioxide in China strives to reach the peak value 2030 years ago, and strives to realize carbon neutralization 2060 years ago. In order to achieve the macro goal of emission reduction, it is necessary to use low-carbon or zero-carbon fuel. Ammonia fuel, hydrogen fuel, nuclear energy, and the like are considered as one of the most representative zero-carbon energy sources in future shipping circles, wherein the ammonia fuel is used as a main source of fuel for ship engines for a long time in the future due to low transportation cost and high safety, and meanwhile, the demand for liquid ammonia is increasing in various industries, and the marine transportation of a large amount of liquid ammonia is also expanding continuously.
Ammonia has a boiling point of-33.35 ℃ and can be stored in a liquid state at a normal temperature under a lower pressure, is an important chemical raw material and is widely applied to the fields of chemical medicines, pesticides, national defense industry, metallurgical industry and the like. The ammonia is stored and transported in a liquid state, has already been well applied on land, and meanwhile, the ammonia can be used as fuel for combustion, and because the ammonia does not contain sulfur, the combustion only generates nitrogen and water with oxygen, and the problem of carbon and sulfur emission is solved, so that the ammonia is a very clean fuel, but when the ammonia is used as the fuel, the pressure of a container for storing the ammonia is often insufficient, and the inconvenience of energy supply is caused.
At present, ammonia is not widely used in the field of engine fuels due to the characteristics of toxicity, volatility, easy leakage and the like. However, along with the improvement and maturity of the technology and international decisions on reducing carbon emission, various difficulties are gradually overcome, and further research and development of ammonia fuel engines are gradually carried out, so that a liquid ammonia storage tank and an air supply system thereof are particularly important for safe storage and air supply as complete equipment matched with the liquid ammonia storage tank, however, at present, LNG (liquefied natural gas) is still adopted for fuel transition, and the manufacturing cost of an LNG fuel tank and the air supply system is higher, so that the energy supply system capable of directly switching ammonia fuel in the future is also particularly important, the LNG fuel tank and part of pipeline systems can be utilized as far as possible, and the cost and the transformation time for replacing a host to switch fuel are greatly reduced.
Disclosure of Invention
The invention aims to provide a dual-purpose energy supply system for natural gas and ammonia gas for a ship, which can supply energy to an ammonia fuel host machine without newly establishing an energy supply pipeline, and simultaneously utilizes the pipeline to carry out return gas pressurization on liquid ammonia in a storage tank, thereby solving the problem of insufficient pressure of the liquid ammonia in the storage tank.
In order to achieve the purpose, the invention provides the following technical scheme:
a dual-purpose energy supply system for natural gas and ammonia gas for ships comprises a fuel storage system, a fuel gas supply system, a gas recovery system and a safety discharge system;
the fuel storage system comprises a storage tank, a probe is arranged in the storage tank and connected with a monitoring system of a central control room, and a heat insulation layer is arranged outside the storage tank;
the fuel gas supply system comprises a natural gas supply system and a liquid ammonia supply system, the natural gas supply system comprises a natural gas liquid phase root valve for controlling an outlet of the storage tank, the outlet of the natural gas liquid phase root valve is communicated with the inlet of the natural gas pump, the outlet of the natural gas pump is communicated with the inlet of the evaporator, the outlet of the evaporator is communicated with the inlet of the heater, the outlet of the heater is communicated with the inlet of the buffer tank, the outlet of the buffer tank is communicated with the inlet of the natural gas supply valve group through a natural gas pressure regulating device, the natural gas supply valve group provides fuel for a natural gas host, the outlet end of the heater is connected with a return gas pressurization pipeline, the return gas pressurization pipeline is communicated with the storage tank through a pressurization gas phase root valve, one side of the natural gas pump is connected with a drainage pipeline, and the drainage pipeline is provided with a drainage gas phase root valve; the liquid ammonia gas supply system is connected with an outlet of the storage tank through a liquid ammonia liquid phase root valve, the outlet of the liquid ammonia liquid phase root valve is communicated with an inlet of a liquid ammonia pump, an outlet of the liquid ammonia pump is communicated with an inlet of a liquid ammonia daily tank, an outlet of the liquid ammonia daily tank is communicated with an inlet of a buffer tank through a heater, an outlet of the buffer tank is communicated with an ammonia gas supply valve bank through an ammonia gas pressure regulating device, and the ammonia gas supply valve bank provides fuel for the ammonia fuel host;
the gas recovery system comprises a recovery pipeline arranged at the front end of the heater, the recovery pipeline is sequentially connected with a compressor, a cooler and an ammonia liquefaction device, and a recovery gas phase root valve is arranged between the ammonia liquefaction device and the storage tank;
the safety relief system comprises a relief pipeline arranged at the storage tank relief port, and the relief pipeline is sequentially connected with a relief device, an ammonia treatment device and a ventilating mast. The detection system can monitor the pressure, liquid level, temperature and other data in the storage tank at any time through the probes to ensure the safe operation of the transportation and energy supply of the storage tank, when a safety failure occurs, a liquid phase root valve can be used for emergently cutting off a pipeline to ensure the safety of a ship, when natural gas is used, a natural gas liquid phase root valve is opened, a drainage gas phase root valve on a drainage pipeline is opened at the same time, the liquid natural gas is transferred to an evaporator through a natural gas pump, the liquid natural gas is converted into low-temperature gaseous natural gas by the evaporator, the low-temperature gaseous natural gas is heated to the temperature required by a host machine through a heater, the heated gaseous natural gas is stored in a buffer tank, the pressure of the natural gas is stabilized through a natural gas pressure regulating device, when the natural gas host machine is supplied with energy through a natural gas supply valve group, and when a ship host machine is replaced by an ammonia fuel host machine, storing liquid ammonia in a storage tank, opening a liquid ammonia liquid phase root valve, transferring the liquid ammonia to a liquid ammonia daily tank through a liquid ammonia pump, heating the liquid ammonia by a heater, vaporizing the liquid ammonia and raising the temperature to the temperature required by the function, storing the ammonia in a buffer tank, replacing an original natural gas pressure regulating device with an ammonia pressure regulating device, stabilizing the pressure of the ammonia, supplying fuel to an ammonia fuel host through an ammonia gas supply valve group, connecting an air return pressurizing pipeline to the outlet end of the heater, communicating the air return pressurizing pipeline with the storage tank through a pressurizing gas phase root valve, increasing the pressure in the storage tank by introducing the gas back to the storage tank when the pressure of the liquid ammonia in the storage tank is low during the operation of the system, generating redundant ammonia by a pipeline in a gas supply system, and returning the redundant ammonia to the storage tank in the form of the liquid ammonia again after the redundant ammonia is processed by a compressor, a cooler and an ammonia liquefying device, the waste of unnecessary ammonia has been avoided, when storage tank, equipment and pipeline break down or pressure reach the set pressure of releasing, use the pipeline of releasing to carry out the pressure release processing to fuel in the storage tank, because ammonia is toxic, install ammonia processing apparatus additional before ventilative mast, after changing new host computer and new forms of energy, need not to change the storage tank of new, need not to lay new energy supply pipeline, can accomplish the energy supply to ammonia fuel host computer, practiced thrift the renewal cost greatly.
Preferably, the storage tank is made of austenitic stainless steel. The austenitic stainless steel can be compatible with natural gas and liquid ammonia, the designed metal temperature reaches-196 ℃, the minimum working temperature of the natural gas is-163 ℃ and the minimum working temperature of the liquid ammonia is-33.4 ℃, and the design pressure of the storage tank is 5-9 bar.
Preferably, the heat insulation layer is a vacuum heat insulation layer or a foaming heat insulation layer. The use of the insulating layer ensures the evaporation rate and the maintenance duration of the fuel in the tank.
Preferably, the meter range of the detection system simultaneously meets the use of two fuel working conditions.
Preferably, the natural gas liquid phase root valve, the liquid ammonia liquid phase root valve, the drainage gas phase root valve, the recovery gas phase root valve and the pressurization gas phase root valve are all pneumatically controlled, are connected with a detection system and are remotely controlled by the detection system. By adopting remote pneumatic control, when a safety fault occurs, the pipeline can be cut off immediately, and the safe operation of the ship is ensured.
Preferably, the recovery pipeline, the return air pressurization pipeline and the drainage pipeline are communicated with the top of the storage tank.
Compared with the prior art, the invention has the following advantages:
after the new energy host computer is changed, need not to change the storage tank and the energy supply system that adapt to, only need to get rid of the natural gas cleanness in original storage tank and the public pipeline, alright direct filling new fuel in the storage tank, for the energy supply of ammonia fuel host computer, reduced the cost of boats and ships update upgrading, be convenient for the popularization and application of future ammonia fuel host computer.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention;
wherein, 1-storage tank, 2-heat insulating layer, 3-natural gas liquid-phase root valve, 4-natural gas pump, 5-evaporator, 6-heater, 7-buffer tank, 8-natural gas pressure regulating device, 9-natural gas supply valve bank, 10-natural gas host, 11-liquid ammonia liquid-phase root valve, 12-liquid ammonia pump, 13-liquid ammonia daily tank, 14-ammonia gas supply valve bank, 15-ammonia fuel host, 16-drainage gas phase root valve, 17-pressurization gas phase root valve, 18-compressor, 19-cooler, 20-ammonia liquefying device, 21-recovery gas phase root valve, 22-discharge device, 23-ammonia processing device, 24-ventilation mast, 25-detection system
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, a dual-purpose energy supply system for natural gas and ammonia gas for a ship comprises a fuel storage system, a fuel gas supply system, a gas recovery system and a safety discharge system;
the fuel storage system comprises a storage tank 1, wherein the storage tank 1 is made of austenitic stainless steel and can meet the requirements of the lowest working temperature of natural gas, namely 163 ℃ below zero and the lowest working temperature of liquid ammonia, the storage tank 11 is designed to have the pressure of 5-9bar, a probe is arranged in the storage tank 1 and is connected with a monitoring system 25 of a central control room, the instrument range of the monitoring system 25 can meet the working conditions of two fuels for use, a heat insulation layer 2 is arranged outside the storage tank 1, and the heat insulation layer 2 is a vacuum heat insulation layer or a foaming heat insulation layer and can guarantee the evaporation rate and the maintenance duration of the fuel in the storage tank 1;
the fuel gas supply system comprises a natural gas supply system and a liquid ammonia supply system, the natural gas supply system comprises a natural gas liquid phase root valve 3 for controlling an outlet of the storage tank 1, an outlet of the natural gas liquid phase root valve 3 is communicated with an inlet of a natural gas pump 4, an outlet of the natural gas pump 4 is communicated with an inlet of an evaporator 5, an outlet of the evaporator 5 is communicated with an inlet of a heater 6, an outlet of the heater 6 is communicated with an inlet of a buffer tank 7, an outlet of the buffer tank 7 is communicated with a natural gas supply valve group 9 through a natural gas pressure regulating device 8, the natural gas supply valve group 9 provides fuel for a natural gas host 10, an outlet end of the heater 6 is connected with a return gas pressurization pipeline, the return gas pressurization pipeline is communicated with the storage tank 1 through a pressurization gas phase root valve 17, one side of the natural gas pump 4 is connected with a drainage pipeline, and the drainage pipeline is provided with a drainage gas phase root valve 16; the liquid ammonia gas supply system is connected with an outlet of the storage tank 1 through a liquid ammonia liquid phase root valve 11, an outlet of the liquid ammonia liquid phase root valve 11 is communicated with an inlet of a liquid ammonia pump 12, an outlet of the liquid ammonia pump 12 is communicated with an inlet of a liquid ammonia tank 13, an outlet of the liquid ammonia tank 13 is communicated with an inlet of a buffer tank 7 through a heater 6, an outlet of the buffer tank 7 is communicated with an ammonia gas supply valve bank 14 through an ammonia gas pressure regulating device, and the ammonia gas supply valve bank 14 supplies fuel to an ammonia fuel host 15;
the gas recovery system comprises a recovery pipeline arranged at the front end of the heater, the recovery pipeline is sequentially connected with a compressor 18, a cooler 19 and an ammonia liquefaction device 20, a recovery gas phase root valve 21 is arranged between the ammonia liquefaction device 20 and the storage tank, and the recovery pipeline and a pipeline at the inlet end of the gas return pressurization pipeline are shared and are separated by a stop valve;
the natural gas-liquid phase root valve 3, the liquid ammonia-liquid phase root valve 11, the drainage gas phase root valve 16, the recovery gas phase root valve 21 and the pressurization gas phase root valve 17 are all pneumatically controlled, are connected with a detection system 25 and are remotely controlled by the detection system 25;
the safety relief system comprises a relief pipeline arranged at a relief opening of the storage tank 1, and the relief pipeline is sequentially connected with a relief device 22, an ammonia treatment device 23 and a ventilating mast 24.
The recovery pipeline, the return gas pressurization pipeline and the drainage pipeline are communicated with the top of the storage tank 1, the gaseous fuel is left at the top of the storage tank 1, and the recovery pipeline, the return gas pressurization pipeline and the drainage pipeline are communicated with the top of the storage tank, so that the fuel in the storage tank can be pressurized conveniently.
The working process and principle of the dual-purpose energy supply system for the natural gas and the ammonia gas for the ship are as follows: when the ship uses natural gas as fuel, a natural gas liquid phase root valve 3 is opened, a drainage gas phase root valve 16 is opened at the same time, a natural gas pump 4 is started, liquid natural gas is barge to an evaporator 5, the liquid natural gas is converted into low-temperature gaseous natural gas by the evaporator 5, the low-temperature gaseous natural gas is heated to the temperature required by a host by a heater 6, the heated gaseous natural gas is stored in a buffer tank 7, the pressure of the natural gas is stabilized by a natural gas pressure regulating device 8, energy is supplied to a natural gas host 10 by a natural gas supply valve bank 9, when the ship host is replaced by an ammonia fuel host 15, liquid ammonia is stored in a storage tank 1, a liquid ammonia liquid phase root valve 11 is opened, the liquid ammonia is barge to a liquid ammonia day tank 13 by a liquid ammonia pump 12, the liquid ammonia is vaporized and heated by the heater 6, the temperature is raised to the temperature required by the function, the ammonia is stored in the buffer tank 7, the original natural gas pressure regulating device 8 is replaced by an ammonia gas pressure regulating device, after the ammonia gas pressure is stabilized, fuel is provided for an ammonia fuel host 15 through an ammonia gas supply valve bank 14, the outlet end of the heater 6 is connected with a return air pressurizing pipeline which is communicated with the storage tank 1 through a pressurizing gas phase root valve 17, in the system operation process, if the pressure of the liquid ammonia in the storage tank 1 is low, the pressure in the storage tank 1 is increased by introducing the gas back into the storage tank 1, the pipeline in the gas supply system can generate redundant ammonia gas, the redundant ammonia gas is treated by the compressor 18, the cooler 19 and the ammonia liquefying device 20 and then returns to the storage tank 1 in the form of liquid ammonia again, the waste of the redundant ammonia gas is avoided, when the storage tank, the equipment and the pipeline are in failure or the pressure reaches the set discharge pressure, the discharge pipeline is used for carrying out pressure relief treatment on the fuel in the storage tank 1, and the ammonia treatment device 23 is used for treating the toxicity of the ammonia gas.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a marine natural gas and ammonia dual-purpose energy supply system which characterized in that: the system comprises a fuel storage system, a fuel gas supply system, a gas recovery system and a safety discharge system;
the fuel storage system comprises a storage tank, a probe is arranged in the storage tank and connected with a monitoring system of a central control room, and a heat insulation layer is arranged outside the storage tank;
the fuel gas supply system comprises a natural gas supply system and a liquid ammonia supply system, the natural gas supply system comprises a natural gas liquid phase root valve for controlling the outlet of the storage tank, the outlet of the natural gas liquid phase root valve is communicated with the inlet of the natural gas pump, the outlet of the natural gas pump is communicated with the inlet of the evaporator, the outlet of the evaporator is communicated with the inlet of the heater, the outlet of the heater is communicated with the inlet of the buffer tank, the outlet of the buffer tank is communicated with the outlet of the natural gas supply valve through a natural gas pressure regulating device, the natural gas supply valve group provides fuel for a natural gas host, the outlet end of the heater is connected with an air return pressurizing pipeline, the air return pressurizing pipeline is communicated with the storage tank through a pressurizing gas phase root valve, one side of the natural gas pump is connected with a drainage pipeline, and the drainage pipeline is provided with a drainage gas phase root valve; the liquid ammonia gas supply system is connected with an outlet of the storage tank through a liquid ammonia liquid phase root valve, the outlet of the liquid ammonia liquid phase root valve is communicated with an inlet of a liquid ammonia pump, an outlet of the liquid ammonia pump is communicated with an inlet of a liquid ammonia daily tank, an outlet of the liquid ammonia daily tank is communicated with an inlet of a buffer tank through a heater, an outlet of the buffer tank is communicated with an ammonia gas supply valve bank through an ammonia gas pressure regulating device, and the ammonia gas supply valve bank provides fuel for the ammonia fuel host;
the gas recovery system comprises a recovery pipeline arranged at the front end of the heater, the recovery pipeline is sequentially connected with a compressor, a cooler and an ammonia liquefying device, and a recovery gas phase root valve is arranged between the ammonia liquefying device and the storage tank;
the safety relief system comprises a relief pipeline arranged at the storage tank relief port, and the relief pipeline is sequentially connected with a relief device, an ammonia treatment device and a ventilating mast.
2. The marine natural gas and ammonia gas dual-purpose energy supply system according to claim 1, characterized in that: the storage tank is made of austenitic stainless steel.
3. The marine natural gas and ammonia gas dual-purpose energy supply system according to claim 1, characterized in that: the heat insulation layer adopts a vacuum heat insulation layer or a foaming heat insulation layer.
4. The marine natural gas and ammonia gas dual-purpose energy supply system according to claim 1, characterized in that: the probe in the storage tank and the meter range of the detection system simultaneously meet the use of two fuel working conditions.
5. The marine natural gas and ammonia gas dual-purpose energy supply system according to claim 1, characterized in that: the natural gas liquid phase root valve, the liquid ammonia liquid phase root valve, the drainage gas phase root valve, the recovery gas phase root valve and the pressurization gas phase root valve are all pneumatically controlled, are connected with a detection system and are remotely controlled by the detection system.
6. The marine natural gas and ammonia gas dual-purpose energy supply system according to claim 1, characterized in that: the recovery pipeline, the return gas pressurization pipeline and the drainage pipeline are communicated with the top of the storage tank.
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| CN202210427781.7A CN114776488B (en) | 2022-04-22 | 2022-04-22 | Marine natural gas and ammonia dual-purpose energy supply system |
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| CN202210427781.7A CN114776488B (en) | 2022-04-22 | 2022-04-22 | Marine natural gas and ammonia dual-purpose energy supply system |
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| CN114776488A true CN114776488A (en) | 2022-07-22 |
| CN114776488B CN114776488B (en) | 2023-12-19 |
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| CN115372541A (en) * | 2022-10-21 | 2022-11-22 | 合肥工业大学 | Experimental device for be used for ammonia efflux flame research |
| IT202200018135A1 (en) * | 2022-09-05 | 2024-03-05 | Gas And Heat S P A | STEEL FOR TRANSPORT AND STORAGE OF LIQUID AMMONIA |
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|---|---|
| CN114776488B (en) | 2023-12-19 |
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