CN114110419A - Normal-temperature liquid propane ship unloading system and ship unloading method - Google Patents
Normal-temperature liquid propane ship unloading system and ship unloading method Download PDFInfo
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- CN114110419A CN114110419A CN202111459366.1A CN202111459366A CN114110419A CN 114110419 A CN114110419 A CN 114110419A CN 202111459366 A CN202111459366 A CN 202111459366A CN 114110419 A CN114110419 A CN 114110419A
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- ship unloading
- gas
- liquid propane
- ship
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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
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
-
- 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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
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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
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
-
- 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
- F17D1/065—Arrangements for producing propulsion of gases or vapours
- F17D1/07—Arrangements for producing propulsion of gases or vapours by compression
-
- 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
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/035—Propane butane, e.g. LPG, GPL
-
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a normal-temperature liquid propane ship unloading system and method, and belongs to the technical field of ships and ocean engineering equipment. The invention comprises a deck fuel tank, a gasification pry, a nitrogen cylinder group, a pressurization pry, a tank car and a flare tower, wherein an inlet of the gasification pry is communicated with the deck fuel tank through a first vacuum metal hose, the nitrogen cylinder group is communicated with the first vacuum metal hose through a pipeline, an inlet of the pressurization pry is communicated with an exhaust port of the gasification pry through a second vacuum metal hose, the tank car is communicated with an outlet of the pressurization pry through a third vacuum metal hose, a three-way valve is respectively communicated with the exhaust port of the tank car and the exhaust port of the gasification pry through the first metal hose and the second metal hose, and the flare tower is communicated with the three-way valve through the third metal hose.
Description
Technical Field
The invention relates to a normal-temperature liquid propane ship unloading system and method, and belongs to the technical field of ships and ocean engineering equipment.
Background
In recent years, LPG is becoming the mainstream choice in the market as a new fuel for dual-fuel liquid gas ships. Compared with the conventional power plant ship, the LPG as the fuel has the advantages of high heat value, environmental protection and meeting the environmental protection requirement of zero emission of sulfides. However, compared with the conventional power ship, the LPG dual-fuel ship needs to perform pilot verification on the LPG liquid supply system and the main engine gas mode before delivery. LPG is generally stored in a C-type full-pressure tank (hereinafter referred to as a fuel tank) in a state of being pressurized at a normal temperature. LPG filling operation is carried out on the fuel tank before the pilot run of the fuel gas, and the total LPG filling amount is the sum of the minimum starting liquid level and the test using amount of the fuel pump. After a gas pilot, a portion of LPG fuel is typically left. If the filling dock is used for processing, the cost is high, and the window period of the filling dock is difficult to coordinate. There is a need to find a safe and efficient method of unloading a ship to process LPG remaining in the fuel tank.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a normal temperature liquid propane ship unloading system, which is used to solve the problem in the prior art that the residual LPG fuel cannot be efficiently and cost-effectively processed after the gas pilot.
To achieve the above and other related objects, the present invention provides a normal temperature liquid propane ship unloading system, comprising: deck fuel jar, gasification sled, nitrogen gas bottle group, pressure boost sled, tank wagon and torch tower, gasification sled entry through first vacuum metal collapsible tube intercommunication deck fuel jar, nitrogen gas bottle group through the first vacuum metal collapsible tube of pipeline intercommunication, pressure boost sled entry through second vacuum metal collapsible tube intercommunication gasification sled gas vent, the tank wagon pass through third vacuum metal collapsible tube intercommunication pressure boost sled export, the three-way valve respectively through first metal collapsible tube and second metal collapsible tube intercommunication tank wagon gas vent and gasification sled gas vent, the torch tower pass through third metal collapsible tube intercommunication three-way valve.
In an embodiment of the present invention, the deck fuel tank is provided with a liquid phase inlet and a gas phase outlet.
In an embodiment of the present invention, the inlet and the exhaust port of the gasification sled are both provided with a stop valve, and the inlet and the exhaust port of the gasification sled are communicated through a bypass valve.
In an embodiment of the invention, the inlet and the outlet of the supercharging pry are both provided with a stop valve, and the inlet and the outlet of the supercharging pry are communicated through a bypass valve.
In an embodiment of the invention, the tank car and the third vacuum metal hose are connected by a quick connector.
A normal-temperature liquid propane ship unloading method is characterized by comprising the following steps:
s1, inerting the ship unloading device and the gas in the pipeline;
s2, replacing the gas inside the ship unloader and the pipeline;
s3, gas phase pressurization;
and S4, unloading the ship.
In an embodiment of the present invention, the specific method for inerting the gas inside the ship unloading device and the pipeline includes: and (3) filling inerting gas into the ship unloading device and the pipeline until the oxygen content in all the ship unloading device and the pipeline is lower than 2 percent and the dew point is lower than minus 40 ℃.
In an embodiment of the present invention, the specific method for replacing the gas inside the ship unloader and the pipeline includes: and gasifying the liquid propane, discharging into the ship unloading device and the pipeline, discharging the mixed gas of the inert gas and the propane gas, and burning and discharging the mixed gas in a burning mode until the ship unloading device and the pipeline are filled with the propane gas.
In an embodiment of the present invention, the specific method of gas-phase pressurization includes: after the liquid propane is vaporized, the gaseous propane enters the storage device and pressurizes the storage device until the pressure in the storage device is raised to 3 bar.
In an embodiment of the present invention, the specific method for unloading the ship includes: after the pressure in the storage device is raised to 3bar, liquid propane is directly input into the ship unloading device and the pipeline, and the liquid propane is input into the storage device for storage after being pressurized.
As mentioned above, the normal temperature liquid propane ship unloading system has the following beneficial effects:
the invention effectively realizes the ship unloading operation of the liquid propane in the deck fuel tank, avoids the damage to the tank car when fuel enters the tank car by arranging the pressurizing pry and the gasifying pry, realizes the function of conveying the liquid propane from the deck fuel tank to the interior of the tank car by the action of the ship unloading system, greatly improves the working efficiency of the liquid propane fuel ship unloading, reduces the ship unloading cost, and has the advantages of simple system composition, safety, high efficiency, low manufacturing cost and simple and convenient operation.
Drawings
Fig. 1 is a schematic structural diagram illustrating a composition of a normal-temperature liquid propane ship unloading system according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a normal-temperature liquid propane ship unloading method according to an embodiment of the present invention.
Wherein, 1, deck fuel tank; 1-1, liquid phase injection port; 1-2, a gas phase discharge port; 2-1, a first vacuum metal hose; 2-2, a second vacuum metal hose; 2-3, a third vacuum metal hose; 3. gasifying and prying; 4. a pressurizing pry; 5. a tank car; 6-1, a first metal hose; 6-2, a second metal hose; 6-3, a third metal hose; 7. a flare tower; 8. a three-way valve; 9. and (4) a nitrogen bottle group.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1-2. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1, the present invention provides a normal temperature liquid propane ship unloading system, including: the device comprises a deck fuel tank 1, a gasification sled 3, a nitrogen cylinder group 9, a pressurization sled 4, a tank car 5 and a torch tower 7, wherein the deck fuel tank 1 is provided with a liquid-phase filling port 1-1 and a gas-phase discharging port 1-2, an inlet of the gasification sled 3 is communicated with the deck fuel tank 1 through a first vacuum metal hose 2-1, the nitrogen cylinder group 9 is communicated with a first vacuum metal hose 2-1 through a pipeline, an inlet of the pressurization sled 4 is communicated with an exhaust port of the gasification sled 3 through a second vacuum metal hose 2-2, the tank car 5 is communicated with an outlet of the pressurization sled 4 through a third vacuum metal hose 2-3, the tank car 5 and the third vacuum metal hose 2-3 are connected by adopting a quick connector, a three-way valve 8 is communicated with the exhaust port of the tank car 5 and the exhaust port of the gasification sled 3 through a first metal hose 6-1 and a second metal hose 6-2 respectively, the torch tower 7 is communicated with the three-way valve 8 through a third metal hose 6-3, the inlet and the exhaust port of the gasification pry 3 are respectively provided with a stop valve, the inlet and the exhaust port of the gasification pry 3 are communicated through a bypass valve, the inlet and the outlet of the pressurization pry 4 are respectively provided with a stop valve, and the inlet and the outlet of the pressurization pry 4 are communicated through a bypass valve.
The working principle of the normal-temperature liquid propane ship unloading system is as follows: firstly, inerting and replacing ship unloading devices and pipelines, providing 98% purity nitrogen by a nitrogen cylinder group 9, sequentially flowing through a first vacuum metal hose 2-1, a gasification pry 3, a pressurization pry 4, a third vacuum metal hose 2-3, a tank car 5, a first metal hose 6-1, a second metal hose 6-2, a three-way valve 8 and a third metal hose 6-3, and then entering a flare tower 7 for emptying until the oxygen content in all the devices and pipelines is lower than 2% and the dew point is lower than-40 ℃; secondly, normal-temperature liquid propane is provided by a deck fuel tank 1, enters a gasification pry 3 through a first vacuum metal hose 2-1 to be gasified, then sequentially flows through a second vacuum metal hose 2-2, a pressurizing pry 4 bypass and a third vacuum metal hose 2-3 to enter a tank truck 5, and mixed gas of nitrogen and propane enters a torch tower 7 through a first metal hose 6-1, a three-way valve 8 and a third metal hose 6-3 to be combusted; then, liquid propane is provided by the deck fuel tank 1, is gasified by the gasification pry 3, flows through the second vacuum metal hose 2-2, the pressurizing pry 4 by-pass and the third vacuum metal hose 2-3 to enter the tank truck 5, and the pressure of the tank truck 5 is increased to 3 bar; and finally, closing the gasification function of the gasification pry 3, opening the bypass valve, providing normal-temperature liquid propane by the deck fuel tank 1, sequentially flowing through the first vacuum metal hose 2-1, the gasification pry 3 bypass, the second vacuum metal hose 2-2, the pressurization pry 4 and the third vacuum metal hose 2-3, and entering the tank truck 5 for storage.
Referring to fig. 2, the present invention provides a normal temperature liquid propane ship unloading method, which is characterized by comprising the following steps:
s1, inerting the ship unloading device and the gas in the pipeline:
discharging inerting gas into the ship unloading device and the pipeline until the oxygen content in all the ship unloading devices and the pipeline is lower than 2 percent and the dew point is lower than minus 40 ℃;
s2, replacing the gas inside the ship unloading device and the pipeline:
gasifying liquid propane and then discharging the gasified liquid propane into an unloading device and a pipeline, mixing inert gas with propane gas and then discharging the mixture, and burning and discharging the mixed gas in a burning mode until the unloading device and the pipeline are filled with the propane gas;
s3, gas-phase pressurization:
gasifying liquid propane, enabling the gaseous propane to enter a storage device and pressurizing the storage device until the pressure in the storage device is increased to 3 bar;
s4, unloading the ship:
after the pressure in the storage device is raised to 3bar, liquid propane is directly input into the ship unloading device and the pipeline, and the liquid propane is input into the storage device for storage after being pressurized.
In conclusion, the invention effectively realizes the ship unloading operation of the liquid propane in the deck fuel tank, avoids the damage to the tank car when fuel enters the tank car by arranging the pressurizing pry and the gasifying pry, realizes the function of conveying the liquid propane from the deck fuel tank to the interior of the tank car by the action of the ship unloading system, greatly improves the working efficiency of the liquid propane fuel ship unloading, reduces the ship unloading cost, and has the advantages of simple system composition, safety, high efficiency, low manufacturing cost and simple and convenient operation. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The normal-temperature liquid propane ship unloading system is characterized by comprising the following components: deck fuel jar (1), gasification sled (3), nitrogen gas bottle group (9), pressure boost sled (4), tank car (5) and torch tower (7), gasification sled (3) entry through first vacuum metal collapsible tube (2-1) intercommunication deck fuel jar (1), nitrogen gas bottle group (9) through pipeline intercommunication first vacuum metal collapsible tube (2-1), pressure boost sled (4) entry through second vacuum metal collapsible tube (2-2) intercommunication gasification sled (3) gas vent, tank car (5) through third vacuum metal collapsible tube (2-3) intercommunication pressure boost sled (4) export, three-way valve (8) respectively through first metal collapsible tube (6-1) and second metal collapsible tube (6-2) intercommunication tank car (5) gas vent and gasification sled (3) gas vent, torch tower (7) through third metal collapsible tube (6-3) intercommunication three-way valve (8).
2. The normal-temperature liquid propane ship unloading system according to claim 1, wherein: the deck fuel tank (1) is provided with a liquid phase inlet (1-1) and a gas phase outlet (1-2).
3. The normal-temperature liquid propane ship unloading system according to claim 1, wherein: the inlet and the exhaust port of the gasification sled (3) are provided with stop valves, and the inlet and the exhaust port of the gasification sled (3) are communicated through a bypass valve.
4. The normal-temperature liquid propane ship unloading system according to claim 1, wherein: the entry and the exit of pressure boost sled (4) all be provided with the stop valve, and be linked together through the bypass valve between the entry and the export of pressure boost sled (4).
5. The normal-temperature liquid propane ship unloading system according to claim 1, wherein: the tank car (5) is connected with the third vacuum metal hose (2-3) by a quick joint.
6. A normal-temperature liquid propane ship unloading method is characterized by comprising the following steps:
s1, inerting the ship unloading device and the gas in the pipeline;
s2, replacing the gas inside the ship unloader and the pipeline;
s3, gas phase pressurization;
and S4, unloading the ship.
7. The normal-temperature liquid propane ship unloading method according to claim 6, characterized in that: the specific method for inerting the ship unloading device and the gas in the pipeline comprises the following steps: and discharging inerting gas into the ship unloading device and the pipeline until the oxygen content in all the ship unloading devices and the pipeline is lower than 2 percent and the dew point is lower than minus 40 ℃.
8. The normal-temperature liquid propane ship unloading method according to claim 6, characterized in that: the specific method for replacing the gas in the ship unloading device and the pipeline comprises the following steps: and gasifying the liquid propane, discharging into the ship unloading device and the pipeline, discharging a mixed gas of inert gas and propane gas, and burning and discharging the mixed gas in a burning mode until the ship unloading device and the pipeline are filled with the propane gas.
9. The normal-temperature liquid propane ship unloading method according to claim 6, characterized in that: the specific method for gas phase pressurization comprises the following steps: after the liquid propane is gasified, the gaseous propane enters the storage device to pressurize the storage device until the pressure in the storage device is raised to 3 bar.
10. The normal-temperature liquid propane ship unloading method according to claim 6, characterized in that: the specific method for unloading the ship comprises the following steps: after the pressure in the storage device is raised to 3bar, liquid propane is directly input into the ship unloading device and the pipeline, and the liquid propane is input into the storage device for storage after being pressurized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111459366.1A CN114110419B (en) | 2021-12-02 | 2021-12-02 | Normal-temperature liquid propane ship unloading system and ship unloading method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111459366.1A CN114110419B (en) | 2021-12-02 | 2021-12-02 | Normal-temperature liquid propane ship unloading system and ship unloading method |
Publications (2)
| Publication Number | Publication Date |
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| CN114110419A true CN114110419A (en) | 2022-03-01 |
| CN114110419B CN114110419B (en) | 2023-08-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024098703A1 (en) * | 2022-11-11 | 2024-05-16 | 中车长江车辆有限公司 | Lng fuel tank system for ship |
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| JP2004125039A (en) * | 2002-10-01 | 2004-04-22 | Mitsubishi Heavy Ind Ltd | Co2 transporting method, fluid storing device, plug shooting device, plug recovering device, and fluid storing method |
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| WO2024098703A1 (en) * | 2022-11-11 | 2024-05-16 | 中车长江车辆有限公司 | Lng fuel tank system for ship |
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| CN114110419B (en) | 2023-08-08 |
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