CN112747252A - System and method for ballasting super tanker by using natural gas hydrate - Google Patents
System and method for ballasting super tanker by using natural gas hydrate Download PDFInfo
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- CN112747252A CN112747252A CN202110058322.1A CN202110058322A CN112747252A CN 112747252 A CN112747252 A CN 112747252A CN 202110058322 A CN202110058322 A CN 202110058322A CN 112747252 A CN112747252 A CN 112747252A
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- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 238000003860 storage Methods 0.000 claims abstract description 50
- 239000007789 gas Substances 0.000 claims abstract description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 56
- 239000000446 fuel Substances 0.000 claims description 37
- 238000011068 loading method Methods 0.000 claims description 25
- 239000003345 natural gas Substances 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000002485 combustion reaction Methods 0.000 claims description 9
- -1 natural gas hydrates Chemical class 0.000 claims description 8
- 230000008016 vaporization Effects 0.000 claims description 4
- 239000008236 heating water Substances 0.000 claims description 3
- 239000013505 freshwater Substances 0.000 abstract description 17
- 238000000354 decomposition reaction Methods 0.000 abstract description 10
- 239000010779 crude oil Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 108010066057 cabin-1 Proteins 0.000 description 10
- 239000003921 oil Substances 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/002—Storage in barges or on ships
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/06—Fluid distribution
- F17C2265/066—Fluid distribution for feeding engines for propulsion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a ballast system and a method for a super tanker by using natural gas hydrate, wherein the system mainly comprises: hydrate storage cabin, water pump, pressure control three-way valve, pressure sensor, compressor, buffer tank etc.. The system provided by the invention can utilize the function of the natural gas hydrate serving as part of ballast water in order to improve the stability of the ship in the sailing process when the ship sails in an idle state, gas generated by the decomposition of the natural gas hydrate can be combusted by a main engine of the ship, and the generated fresh water is stored in the ballast tank and can be directly supplied to a region where fresh water is scarce in a crude oil production place without being treated by the ballast water after the ship arrives at an unloading port, so that the problem that the fresh water is scarce in the crude oil production place is solved, the zero-cost transportation of fresh water resources is realized, the treatment capacity of the ballast water is reduced, and the cost for treating the ballast water is saved, therefore, the system has good application value.
Description
Technical Field
The invention belongs to the technical field of ships, and particularly relates to a system and a method for ballasting a super tanker by using natural gas hydrate.
Background
With the development of technology, the global oil trade volume is rapidly increased, in order to meet the requirements of crude oil transportation, a large oil tanker is a mainstream ship type for transporting crude oil, the load capacity of the oil tanker at present reaches about 300000 tons, the oil tanker is generally called as a VLCC ship, because the VLCC ship has large load capacity, large power of a host and large fuel consumption, a large amount of pollutants can be generated by burning heavy oil, and in order to reduce the emission of the pollutants, a low-speed two-stroke dual-fuel diesel engine taking natural gas as fuel can be adopted as a ship host.
LNG and natural gas hydrate are two better storage modes of natural gas, wherein the LNG is low-temperature liquid at the temperature of 163 ℃ below zero, the main component of the LNG is methane, the natural gas hydrate is an ice-like crystalline substance formed by natural gas and water under certain conditions, and the main component of the natural gas hydrate is water and methane. The natural gas can be changed into LNG only by compression under the condition of low temperature, the power consumption is high, the LNG storage has high requirements on the heat insulation performance and the low temperature resistance of the storage tank, the cost is high, the preparation condition of the natural gas hydrate is relatively easy to realize, the power consumption is low, the natural gas hydrate can be stored under the conditions that the temperature is-18 ℃ and the pressure is low, the requirements on storage equipment are not high, the cost is relatively low, and the natural gas hydrate has the advantages compared with the LNG. However, 1m3Can store about 600m31m of natural gas (g)3Can store 150m of natural gas hydrate3To 180m31m of natural gas (g)3About 426kg, 1m of LNG3The weight of the natural gas hydrate is about 900kg, so that the mass of the natural gas hydrate is much larger than that of the LNG when the same volume of natural gas is stored, and thus the natural gas hydrate has a disadvantage of being heavier than the LNG.
In addition, the main route of the VLCC ship is to transport crude oil from an unloading port in China to a loading port at a crude oil producing place such as near the middle east persian bay, and the route is relatively single, and the country near the persian bay has much crude oil but scarce fresh water. During the voyage to the loading port, the VLCC ship is in an empty state, and when going from the loading port to the unloading port, the ship is in a full state. In an idling state, in order to improve the stability of a ship, a large amount of ballast water is added into a ship ballast tank before sailing to enhance the wind and wave resistance, the weight of the ballast water reaches 100000 tons, the ballast water needs to be completely discharged after the ship arrives at a loading port, in order to prevent the ballast water from invading and damaging marine organisms in different sea areas, the ballast water needs to be treated in the period of time before the ballast water is injected and discharged, and because the amount of the ballast water is huge, the capacity requirement on ballast water treatment equipment is high when the ballast water is treated, and the power consumption is also large.
Based on the problems, if the natural gas hydrate is used as partial ballast water to be stored in the ship ballast tank when the ship is in no load, the natural gas hydrate is vaporized in the sailing process of the ship to release methane gas for burning of a main diesel engine of the ship, the generated fresh water is stored in the tank and does not need to be processed, the fresh water can be required by the land with shortage of fresh water when the ship arrives at the destination, meanwhile, the treatment amount of partial ballast water can be reduced, energy is saved, and the environment is protected, so that the method has good application value.
Disclosure of Invention
The present invention is directed to solving the above problems, and an object of the present invention is to provide a system and a method for ballasting a super tanker with gas hydrates.
A first object of the present invention is to provide a natural gas hydrate-utilizing ballast system for a super-tanker, the system essentially comprising: the device comprises a hydrate storage cabin, a water pump, a pressure control three-way valve, a pressure sensor, a compressor, a buffer tank, a water pump outlet connector, a cylinder sleeve water heating coil, a cylinder sleeve water inlet pipeline and a cylinder sleeve water outlet pipeline.
The hydrate storage cabin is internally provided with a water pump, the water pump is connected with a water pump outlet joint through a pipeline, a compressor outlet is connected with a buffer tank, a compressor inlet is connected with the top of the hydrate storage cabin through a pipeline, a pressure sensor is arranged in the pipeline, the pressure sensor is connected with a pressure control three-way valve through a capillary pipeline, the pressure control three-way valve is installed between a cylinder sleeve water inlet pipeline and a cylinder sleeve water heating coil, an outlet of the pressure control three-way valve is connected with the pipeline between the cylinder sleeve water outlet pipeline and the cylinder sleeve water heating coil to form a bypass pipeline, the cylinder sleeve water heating coil is installed in the hydrate storage cabin, and the buffer tank is connected with a main diesel engine of a ship. The hydrate storage tank is arranged at the position of the ballast tank in the ship on the port side or the starboard side of the ship, wherein the hydrate storage tank is internally provided with the heat insulation layer, so that the heat exchange between the hydrate storage tank and the external environment can be reduced, and the generation of evaporated gas is reduced.
The opening of the pressure control three-way valve can be controlled by the pressure sensor through the sensed pressure of the BOG in the hydrate storage cabin, when the pressure sensed by the pressure sensor is greater than the pressure set value of the BOG in the hydrate storage cabin, the opening of an outlet of the pressure control three-way valve, which is connected with the bypass pipeline, is increased, and the opening of an outlet of the pressure control three-way valve, which is connected with the cylinder sleeve water heating coil, is decreased; when the pressure sensed by the pressure sensor is smaller than the pressure set value of the BOG in the hydrate storage cabin, the opening degree of an outlet of the pressure control three-way valve connected with the bypass pipeline is reduced, and the opening degree of an outlet of the pressure control three-way valve connected with the cylinder sleeve water heating coil is increased.
A second object of the present invention is to provide a method for ballasting a super tanker with natural gas hydrates based on the above-mentioned system for ballasting a super tanker with natural gas hydrates.
When the VLCC ship sails from an unloading port to a loading port, cylinder sleeve heating water enters a cylinder sleeve water heating coil pipe through a cylinder sleeve water inlet pipeline and is discharged through a cylinder sleeve water outlet pipeline, heat is transferred to hydrate in a hydrate storage cabin to be heated and decomposed, methane gas generated by decomposition is discharged from the hydrate storage cabin, is pressurized by a compressor, firstly reaches a buffer tank, and then is sent to a main diesel engine of the ship for combustion. The total amount of natural gas required to be consumed by the ship host in the sailing process from the unloading port to the loading port of the ship can be calculated by comprehensively considering the range of the ship and the power of the ship host, the required total amount of natural gas hydrate can be calculated according to the total amount of the consumed natural gas, when the natural gas hydrate is filled in the unloading port, only 95% of the calculated total amount of the natural gas hydrate needs to be filled, and therefore the gas generated by decomposition of the natural gas hydrate in the sailing process of the ship can be completely combusted by the ship main diesel engine. If the gas generated by the vaporization of the natural gas hydrate is not enough to provide the fuel quantity required to be consumed by the main diesel engine of the ship in the process of sailing from the unloading port to the loading port, the fuel can be refuted out of the fuel tank by the fuel refuge pump and then sent to the main diesel engine of the ship for combustion.
When the VLCC ship arrives at the loading port, the natural gas stored in the natural gas hydrate storage tank is completely released and burnt, the residual fresh water is stored in the hydrate storage tank, the outlet joint of the water pump is connected with the land receiving joint, and the fresh water in the hydrate storage tank can be conveyed to the land water storage unit through the water pump.
When a ship leaves a loading port, a C-shaped storage tank filled with LNG fuel is installed on a ship deck, no natural gas hydrate exists at this time, in the process of sailing from the loading port to the unloading port when the ship is fully loaded, the LNG fuel is transferred out of a cargo hold through an LNG fuel transfer pump, is pressurized through a booster pump, then passes through a cold energy utilization unit, releases partial cold energy of the LNG fuel, is vaporized through a cylinder liner water heating unit, and the vaporized gas enters a buffer tank and then is sent to a main diesel engine of the ship for combustion. If the LNG fuel is not sufficient to provide the amount of fuel that the main diesel engine of the ship needs to consume during the voyage of the ship from the loading port to the unloading port, the fuel can be refuted out of the fuel tank by the fuel refuge pump and then sent to the main diesel engine of the ship for combustion.
The invention has the advantages that:
1. when the ship sails in an idle load mode, the natural gas is stored in a natural gas hydrate mode with low preparation cost, and the natural gas can be used as partial ballast water and can also be used for supplying fuel for a main diesel engine of the ship by gas generated by decomposition of the natural gas, so that the load capacity of the ballast water is reduced.
2. When the ship arrives at the loading port, the fresh water generated during the decomposition of the natural gas hydrate can be used for the land area with scarce fresh water without any treatment, thereby solving the problem of scarce fresh water in the crude oil production area and realizing the zero-cost transportation of fresh water resources.
3. The natural gas hydrate is used as part of ballast water, so that the loading capacity of the ship ballast water can be reduced, the treatment capacity of the ballast water is reduced, the cost for treating the ballast water is saved, and the method is economic and environment-friendly and has good application value.
Drawings
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a schematic view of a hydrate storage tank installation;
in the drawings: 1. a hydrate storage compartment; 2. a water pump; 3. a pressure control three-way valve; 4. a pressure sensor; 5. a compressor; 6. a buffer tank; 7. a water pump outlet connector; 8. a cylinder liner water heating coil; 9. a cylinder liner water inlet conduit; 10. a cylinder liner water outlet pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples.
A supertanker ballast system utilizing natural gas hydrates, as shown in figure 1, the system consisting essentially of: the device comprises a hydrate storage cabin 1, a water pump 2, a pressure control three-way valve 3, a pressure sensor 4, a compressor 5, a buffer tank 6, a water pump outlet joint 7, a cylinder liner water heating coil pipe 8, a cylinder liner water inlet pipeline 9 and a cylinder liner water outlet pipeline 10.
The hydrate is stored and is equipped with water pump 2 in the cabin 1, water pump 2 is connected with water pump outlet joint 7 through the pipeline, 5 exports of compressor are connected with buffer tank 6, and 5 imports of compressor are connected with hydrate storage cabin 1 through the pipeline, install pressure sensor 4 in the pipeline, pressure sensor 4 is connected with pressure control three-way valve 3 through capillary line, pressure control three-way valve 3 is installed between cylinder liner water inlet pipeline 9 and cylinder liner water heating coil 8, an export of pressure control three-way valve 3 is connected with the pipeline between cylinder liner water outlet pipeline 10 and the cylinder liner water heating coil 8, constitutes bypass pipeline, cylinder liner water heating coil 8 is installed in hydrate storage cabin 1, buffer tank 6 is connected with boats and ships main diesel engine.
The hydrate storage tank 1 is arranged at the position of a ballast tank in a ship on the port side or the starboard side, the installation schematic diagram is shown in fig. 2, the hydrate storage tank 1 is provided with an insulating layer, and heat exchange between the hydrate storage tank 1 and the external environment can be reduced, so that evaporation gas in the hydrate storage tank 1 is reduced.
The pressure sensor 4 can sense the pressure of BOG gas in the hydrate storage cabin, and the opening of the pressure control three-way valve 3 can be controlled through the sensed pressure, so that the amount of cylinder liner water entering the cylinder liner water heating coil 8 is controlled. When the pressure sensed by the pressure sensor 4 is greater than the set pressure of the BOG in the hydrate storage cabin 1, the opening degree of an outlet of the pressure control three-way valve 3 connected with the bypass pipeline is increased, and the opening degree of an outlet of the pressure control three-way valve 3 connected with the cylinder sleeve water heating coil 8 is decreased; when the pressure sensed by the pressure sensor 4 is smaller than the set pressure of the BOG in the hydrate storage cabin 1, the opening degree of the outlet of the pressure control three-way valve 3 connected with the bypass pipeline is reduced, and the opening degree of the outlet of the pressure control three-way valve 3 connected with the cylinder sleeve water heating coil 8 is increased, so that the decomposition rate of the natural gas hydrate can be controlled, the gas quantity generated by the decomposition of the natural gas hydrate just meets the fuel quantity required by a main diesel engine of a ship, the phenomenon that the decomposition rate of the natural gas hydrate is too high, the generated gas is too much, the gas pressure in the hydrate storage cabin 1 is too high, and the hydrate storage cabin 1 is damaged is prevented.
When the VLCC ship sails from an unloading port to a loading port, cylinder sleeve heating water enters a cylinder sleeve water heating coil 8, heat is transferred to hydrate in a hydrate storage cabin 1 to be heated and decomposed, methane gas generated by decomposition is discharged from the hydrate storage cabin 1 and is pressurized by a compressor 5 until the gas supply pressure of a main diesel engine of the ship is about 1.5MPa, and the pressurized gas firstly reaches a buffer tank 6 and then is sent to the main diesel engine of the ship for combustion. The total amount of natural gas required to be consumed by the ship host in the process of sailing from the unloading port to the loading port of the ship can be calculated by comprehensively considering the range of the ship and the power of the ship host, the required total amount of natural gas hydrate can be calculated according to the total amount of the consumed natural gas, when the natural gas hydrate is filled in the unloading port, only 95% of the calculated total amount of the natural gas hydrate needs to be filled, and therefore the gas generated by decomposition of the natural gas hydrate in the sailing process of the ship can be completely combusted by the ship main diesel engine. The gas generated by the vaporization of the natural gas hydrate is not enough to provide the fuel quantity required to be consumed by the main diesel engine of the ship in the process of sailing from the unloading port to the loading port, and the fuel can be transferred out of the fuel cabin by the fuel transfer pump and then sent to the main diesel engine of the ship for burning.
When the VLCC arrives at the loading port, the natural gas stored by the natural gas hydrate in the hydrate storage tank 1 is completely released and burned, the rest fresh water is stored in the hydrate storage tank 1, the water pump outlet joint 7 is connected with a land receiving joint at the moment, the water in the hydrate storage tank 1 can be directly conveyed to a land water storage unit through the water pump 2 for land use, the fuel consumed by the VLCC ship from a domestic unloading port to a middle east loading port voyage is converted into the natural gas hydrate by 10000 tons to 15000 tons, the fresh water generated by vaporization of the natural gas hydrate also reaches more than 10000 tons, the fresh water can be freely conveyed to the middle east, and the treatment amount of ballast water can be reduced by 10000 tons.
When a ship leaves a loading port, a C-shaped storage tank filled with LNG fuel is installed on a ship deck, no natural gas hydrate exists at the moment, the LNG fuel is used as fuel of a main diesel engine of the ship, the LNG fuel is refueled out of a cargo hold through an LNG fuel refueled pump, is pressurized through a booster pump, is pressurized to the air supply pressure of the main diesel engine of the ship and is about 1.5MPa, then passes through a cold energy utilization unit, releases partial cold energy of the LNG fuel, is utilized by equipment needing the cold energy, such as an air conditioner or a refrigeration house on the ship, and the like, is heated and vaporized through a cylinder liner water heating unit, and the vaporized gas enters a buffer tank and is sent to the main diesel engine of the ship for combustion. If the LNG fuel is not sufficient to provide the amount of fuel that the main diesel engine of the ship needs to consume during the voyage of the ship from the loading port to the unloading port, the fuel can be refuted out of the fuel tank by the fuel refuge pump and then sent to the main diesel engine of the ship for combustion.
The invention mainly provides a method for using natural gas hydrate as ballast water and fuel in the process of a VLCC ship from an unloading port to a loading port, wherein the main ship of the VLCC ship uses fuel or LNG in the process of the loading port to the unloading port, which is not the key point of the method, and the method can be reasonably selected according to the actual navigation condition of the ship.
The foregoing is merely a preferred embodiment of the present invention and the specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. It should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (7)
1. A super tanker ballast system utilizing natural gas hydrates, characterized by: the system comprises a hydrate storage cabin (1), a water pump (2), a pressure control three-way valve (3), a pressure sensor (4), a compressor (5), a buffer tank (6), a water pump outlet joint (7), a cylinder sleeve water heating coil (8), a cylinder sleeve water inlet pipeline (9) and a cylinder sleeve water outlet pipeline (10);
a water pump (2) is arranged in the hydrate storage cabin (1), and the water pump (2) is connected with a water pump outlet connector (7) through a pipeline.
2. A supertanker natural gas hydrate ballast system according to claim 1, wherein: the outlet of the compressor (5) is connected with the buffer tank (6), the inlet of the compressor (5) is connected with the hydrate storage cabin (1) through a pipeline, a pressure sensor (4) is arranged in the pipeline, and the pressure sensor (4) is connected with the pressure control three-way valve (3) through a capillary pipeline.
3. A supertanker natural gas hydrate ballast system according to claim 1, wherein: the pressure control three-way valve (3) is installed between a cylinder sleeve water inlet pipeline (9) and a cylinder sleeve water heating coil (8), an outlet of the pressure control three-way valve (3) is connected with a pipeline between a cylinder sleeve water outlet pipeline (10) and the cylinder sleeve water heating coil (8), and the buffer tank (6) is connected with a main diesel engine of the ship.
4. A method of ballasting a supertanker with natural gas hydrates using the system of claim 1, wherein: the hydrate storage tank (1) is arranged at a ballast tank position in the ship on the port side or the starboard side of the ship.
5. A method of ballasting a supertanker with natural gas hydrates using the system of claim 1, wherein: and a heat-insulating layer and a cylinder sleeve water heating coil (8) are arranged in the hydrate storage cabin (1).
6. A method of ballasting a supertanker with natural gas hydrates using the system of claim 1, wherein: when the VLCC ship sails from an unloading port to a loading port, cylinder sleeve heating water enters a cylinder sleeve water heating coil pipe (8) to enable hydrate in a hydrate storage cabin (1) to be heated and decomposed, decomposed methane gas is discharged from the hydrate storage cabin (1) and is pressurized by a compressor (5), and the pressurized gas firstly reaches a buffer tank (6) and then is sent to a main diesel engine of the ship for combustion.
7. A method of ballasting a supertanker with natural gas hydrates using the system of claim 1, wherein: when the natural gas hydrate is filled in the unloading port, only 95% of the total amount of the calculated natural gas hydrate consumed by the ship main engine in the process of sailing the ship from the unloading port to the loading port needs to be filled, so that the gas generated by decomposing the natural gas hydrate in the sailing process of the ship can be completely combusted by the ship main diesel engine, the gas generated by vaporizing the natural gas hydrate is not enough to provide the fuel quantity required by the ship from the unloading port to the loading port, and the fuel can be refuted from the fuel cabin through the fuel refuge pump and then sent to the ship main diesel engine for combustion.
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| CN202110058322.1A CN112747252B (en) | 2021-01-15 | 2021-01-15 | Method for ballasting super tanker by using natural gas hydrate |
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| CN202110058322.1A CN112747252B (en) | 2021-01-15 | 2021-01-15 | Method for ballasting super tanker by using natural gas hydrate |
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| CN112747252B CN112747252B (en) | 2023-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044119A (en) * | 2021-11-11 | 2022-02-15 | 青岛科技大学 | Ship multi-power-source electric propulsion system utilizing ammonia fuel |
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| KR20150146020A (en) * | 2014-06-20 | 2015-12-31 | 국립대학법인 울산과학기술대학교 산학협력단 | Marine Vessels Using Gas Hydrate Slurries for Ballast Water |
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| KR102075296B1 (en) * | 2019-06-14 | 2020-02-07 | 한국해양과학기술원 | System that supplies fuel within a minimal ballast water using gas hydrates, replaces ballast water, and supplies fresh water |
| CN211336398U (en) * | 2019-12-27 | 2020-08-25 | 青岛科技大学 | System for refrigerated container utilizes boats and ships LNG cold energy |
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| CN202138516U (en) * | 2011-05-26 | 2012-02-08 | 上海交通大学 | Ocean platform for natural gas hydrate exploration |
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| CN108674617A (en) * | 2018-04-28 | 2018-10-19 | 中国海洋大学 | Underwater intelligent floating instrument device and its control system |
| CN109764238A (en) * | 2019-01-25 | 2019-05-17 | 大连理工大学 | A kind of natural gas storing-transport-based on Hydrate Technology utilizes integrated apparatus |
| KR102075296B1 (en) * | 2019-06-14 | 2020-02-07 | 한국해양과학기술원 | System that supplies fuel within a minimal ballast water using gas hydrates, replaces ballast water, and supplies fresh water |
| CN211336398U (en) * | 2019-12-27 | 2020-08-25 | 青岛科技大学 | System for refrigerated container utilizes boats and ships LNG cold energy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044119A (en) * | 2021-11-11 | 2022-02-15 | 青岛科技大学 | Ship multi-power-source electric propulsion system utilizing ammonia fuel |
| CN114044119B (en) * | 2021-11-11 | 2024-03-08 | 青岛科技大学 | Ship multi-power-source electric propulsion system utilizing ammonia fuel |
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| CN112747252B (en) | 2023-02-21 |
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