CN113291446B - Supply system of methanol dual-fuel ship daily cabinet and use method thereof - Google Patents
Supply system of methanol dual-fuel ship daily cabinet and use method thereof Download PDFInfo
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- CN113291446B CN113291446B CN202110725606.1A CN202110725606A CN113291446B CN 113291446 B CN113291446 B CN 113291446B CN 202110725606 A CN202110725606 A CN 202110725606A CN 113291446 B CN113291446 B CN 113291446B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B11/00—Interior subdivision of hulls
- B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/14—Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
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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
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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
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
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- 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
Abstract
The invention discloses a replenishment system of a methanol dual-fuel ship daily cabinet and a use method thereof. This replenishment system of daily cabinet of methanol dual-fuel boats and ships includes that the fuel stores the cabinet, the daily cabinet of fuel and with the nitrogen gas jar of the daily cabinet selective intercommunication of fuel, the fuel is stored the cabinet and is connected with the daily cabinet of fuel through the supply line, the fuel stores the cabinet and is used for storing methanol and fuel, the daily cabinet of fuel is used for taking out the inside methanol of fuel storage cabinet or fuel and supplies the host computer of boats and ships to use, fuel storage cabinet and the daily cabinet of fuel all are connected with high-speed ventilation valve, high-speed ventilation valve on the fuel storage cabinet and the daily cabinet selective intercommunication of high-speed ventilation valve on the cabinet of fuel. The nitrogen consumption is low, and the pollution to the environment is reduced.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a replenishment system of a daily tank of a methanol dual-fuel ship and a use method thereof
Background
In some vessels, methanol or fuel oil is selectively used to provide driving fuel for the main engine of the vessel, and such vessels are called methanol dual fuel vessels. Generally, a methanol dual-fuel ship comprises a fuel storage cabinet and a fuel daily cabinet, wherein the fuel storage cabinet is used for storing methanol or fuel oil, and the fuel daily cabinet is used for pumping out the methanol or the fuel oil in the fuel storage cabinet and supplying the methanol or the fuel oil to a host.
In the prior art, the fuel storage cabinet and the daily cabinet of fuel are respectively connected with the nitrogen tank, and along with the consumption of fuel, the inside atmospheric pressure of the fuel storage cabinet and the daily cabinet of fuel reduces, and the nitrogen tank can be for fuel storage cabinet and the daily cabinet of fuel input nitrogen gas to maintain the inside atmospheric pressure of fuel storage cabinet and the daily cabinet of fuel at safe scope respectively. According to the requirements of the classification society specifications, the fuel storage cabinet and the fuel daily cabinet need to be respectively provided with an independent ventilation system so as to ensure the safety of the fuel storage cabinet and the fuel daily cabinet. When the fuel storage cabinet supplies fuel for the fuel daily cabinet, the air pressure in the fuel daily cabinet rises to the set threshold value of the ventilation system, and the fuel daily cabinet discharges nitrogen to the outside. However, the connection of the fuel storage and day tank to the nitrogen tank has the following disadvantages: 1. since methanol or fuel oil is mixed in the nitrogen gas discharged to the outside, the environment is seriously polluted; 2. the in-process of host computer operation, the consumption of the inside fuel of daily cabinet of fuel, nitrogen gas tank inputs nitrogen gas to the daily cabinet of fuel earlier, make the inside atmospheric pressure of cabinet maintain in safe range, then the fuel stores the cabinet and supplies methyl alcohol or fuel to the daily cabinet of fuel inside, the daily cabinet of fuel inside atmospheric pressure can exceed the settlement threshold value of ventilation system along with supplying going on, the daily cabinet of fuel passes through ventilation system and discharges nitrogen gas, make the inside atmospheric pressure of cabinet descend to safe scope, because arrange nitrogen gas in the atmosphere of outside, the waste of nitrogen gas resource has been caused.
Disclosure of Invention
The invention aims to: the supply system of the daily cabinet of the methanol dual-fuel ship and the use method thereof are provided, the consumption of nitrogen is low, and the pollution to the environment is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
on the one hand, the replenishment system of the methanol dual-fuel ship daily cabinet comprises a fuel storage cabinet, a fuel daily cabinet and a nitrogen tank selectively communicated with the fuel daily cabinet, wherein the fuel storage cabinet is connected with the fuel daily cabinet through a replenishment pipe and is used for storing methanol and fuel oil, the fuel daily cabinet is used for pumping out the methanol or the fuel oil in the fuel storage cabinet and supplying the methanol or the fuel oil to a host of a ship, the fuel storage cabinet and the fuel daily cabinet are both connected with high-speed vent valves, and the high-speed vent valves on the fuel storage cabinet are selectively communicated with the high-speed vent valves on the fuel daily cabinet.
As a preferable technical scheme of the replenishing system of the methanol dual-fuel ship daily tank, the fuel storage tank is connected with the fuel daily tank through a first communication pipe, and a first control valve is arranged on the first communication pipe and can close or open the first communication pipe.
As a preferable technical scheme of the replenishment system of the daily tank of the methanol dual-fuel ship, the first communication pipe comprises a first pipe connected with the fuel storage tank and a second pipe connected with the daily tank of the fuel, a third pipe is detachably connected between the first pipe and the second pipe, and the first control valve is arranged on the first pipe and the second control valve is arranged on the second pipe.
As an optimized technical scheme of the replenishing system of the methanol dual-fuel ship daily cabinet, the nitrogen tank is connected with the fuel daily cabinet through a second communicating pipe, and a second control valve is arranged on the second communicating pipe.
As a preferable technical scheme of the replenishing system of the daily tank of the methanol dual-fuel ship, a third control valve is arranged on the replenishing pipe.
As a preferable technical solution of the replenishment system for the daily tank of the methanol dual-fuel ship, two third control valves are provided, and a second check valve is further provided on the replenishment pipe and distributed between the two third control valves.
As a preferable technical scheme of the replenishing system of the methanol dual-fuel ship daily cabinet, a replenishing pump is arranged in the fuel storage cabinet, the replenishing pump is connected with the replenishing pipe, and a fuel pump is arranged between the daily cabinet and the host.
As a preferable technical scheme of the replenishing system of the methanol dual-fuel ship daily cabinet, a liquid level sensor is arranged in the fuel daily cabinet and is used for monitoring the liquid level of the methanol or the fuel oil in the fuel daily cabinet.
The preferable technical scheme of the replenishing system of the methanol dual-fuel ship daily tank further comprises a liquid level sensor, a first air pressure monitor, a second air pressure monitor and a controller, wherein the liquid level sensor is used for monitoring the liquid level of methanol or fuel oil in the fuel daily tank, the first air pressure monitor is used for monitoring the air pressure in the fuel storage tank, the second air pressure monitor is used for monitoring the air pressure in the fuel daily tank, the liquid level sensor, the first air pressure monitor, the second air pressure monitor and the controller are all in communication connection with a control system of a ship, the first control valve, the second control valve and the third control valve are controlled by the controller, and the replenishing pump is in communication connection with the controller.
On the other hand, the use method of the replenishment system of the methanol dual-fuel ship daily cabinet is also provided, and the replenishment system comprises the following steps: when the methanol or the fuel oil in the daily fuel cabinet is consumed and the air pressure in the daily fuel cabinet is reduced, a nitrogen tank inputs nitrogen into the daily fuel cabinet to keep the air pressure in the daily fuel cabinet within a set range, when the liquid level in the daily fuel cabinet is reduced to a set height, the daily fuel cabinet supplies the methanol or the fuel oil to the daily fuel cabinet through a supply pipe, and meanwhile, the daily fuel cabinet supplies the nitrogen to the daily fuel cabinet through a high-speed vent valve to keep the air pressure in the daily fuel cabinet and the air pressure in the daily fuel cabinet balanced.
The invention has the beneficial effects that: in this scheme, store the high-speed ventilation valve on the cabinet with the fuel and communicate with the high-speed ventilation valve of the daily cabinet of using of fuel, can store the cabinet inside with the inside nitrogen gas discharge of the daily cabinet of fuel to the fuel, keep the daily cabinet of fuel and the balance of the inside atmospheric pressure of fuel storage cabinet, make the atmospheric pressure of two internal portions of cabinet keep in safe scope, in the whole supply in-process of methyl alcohol or fuel, can not discharge nitrogen gas to the external environment in, reduce the pollution to the environment, and few to the consumption of nitrogen gas, be favorable to practicing thrift the nitrogen gas resource. In addition, nitrogen does not need to be discharged to the outside, so that the evaporation capacity of methanol or fuel oil can be effectively reduced, and the running cost of the ship is saved.
Drawings
The invention is explained in more detail below with reference to the figures and examples.
Fig. 1 is a schematic structural diagram of a replenishment system of a daily tank of a methanol dual-fuel ship in the embodiment.
In the figure:
1. a fuel storage cabinet; 2. a fuel day cabinet; 3. a nitrogen tank; 4. a high-speed vent valve; 5. a first communication pipe; 501. a first tube; 502. a second tube; 503. a third tube; 6. a first control valve; 7. a second control valve; 8. a third control valve; 9. a second communicating pipe; 10. a supply pipe; 11. a first check valve; 12. a second check valve; 13. a make-up pump; 14. a fuel pump.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in figure 1, the invention provides a replenishment system of a methanol dual-fuel ship daily cabinet, which comprises a fuel storage cabinet 1, a fuel daily cabinet 2 and a nitrogen tank 3 selectively communicated with the fuel daily cabinet 2, wherein the fuel storage cabinet 1 is connected with the fuel daily cabinet 2 through a replenishment pipe 10, the fuel storage cabinet 1 is used for storing methanol and fuel oil, the fuel daily cabinet 2 is used for pumping out the methanol or the fuel oil in the fuel storage cabinet 1 and supplying the methanol or the fuel oil to a main engine of a ship, the fuel storage cabinet 1 and the fuel daily cabinet 2 are both connected with a high-speed vent valve 4, and the high-speed vent valve 4 on the fuel storage cabinet 1 is selectively communicated with the high-speed vent valve 4 on the fuel daily cabinet 2.
When the fuel storage cabinet 1 is used for storing methanol, the fuel storage cabinet 1 can supply methanol to the interior of the fuel daily use cabinet 2 through a supply pipe 10, and the main engine of the ship takes the methanol as a power source; when the fuel storage cabinet 1 is used for storing fuel oil, the fuel storage cabinet 1 can supply the fuel oil to the interior of the daily fuel tank 2 through the supply pipe 10, and at the moment, the main engine of the ship takes the fuel oil as a power source. In actual use, methanol or fuel oil can be stored in the fuel storage cabinet 1 according to requirements, and in order to store methanol, the methanol is usually compressed into a liquid state and stored in the fuel storage cabinet 1 and the fuel day cabinet 2. The fuel daily cabinet 2 is mainly used for temporarily storing methanol or fuel oil and providing transfer service for the supply of the main engine fuel of the ship. The high-speed ventilation valve 4 is a high-speed ventilation PV valve. The high-speed ventilation valve 4 is arranged on the fuel storage cabinet 1 and the fuel daily cabinet 2, and the air pressure inside the fuel storage cabinet 1 and the fuel daily cabinet 2 can be kept within a safe range through the high-speed ventilation valve 4. Specifically, when the air pressure inside the fuel storage cabinet 1 or the fuel day cabinet 2 does not exceed the threshold value of the high-speed vent valve 4, the corresponding high-speed vent valve 4 is kept in a closed state, and when the air pressure inside the fuel storage cabinet 1 or the fuel day cabinet 2 exceeds the threshold value of the high-speed vent valve 4, the high-speed vent valve 4 on the corresponding cabinet body is opened, and the air inside the corresponding cabinet body is discharged, so that accidents such as explosion and the like caused by excessive air pressure inside the cabinet body are prevented.
When the main engine of the ship runs, methanol or fuel oil in the fuel daily cabinet 2 needs to be continuously consumed, the air pressure in the fuel daily cabinet 2 can be reduced along with the consumption of the methanol or the fuel oil, and in order to prevent the fuel daily cabinet from being damaged due to the change of the internal air pressure, the nitrogen tank 3 inputs nitrogen into the fuel daily cabinet 2 so as to keep the air pressure in the fuel daily cabinet 2 in a safe range. When the methanol or the fuel oil in the daily fuel cabinet 2 is consumed to a set height, the daily fuel cabinet 2 needs to be supplied with the methanol or the fuel oil by the fuel storage cabinet 1 through the supply pipe 10, the liquid level in the daily fuel cabinet 2 continuously rises in the supply process, so that the air pressure in the daily fuel cabinet 2 also continuously rises, and the air pressure in the fuel storage cabinet 1 continuously falls, in the scheme, the high-speed vent valve 4 on the fuel storage cabinet 1 is communicated with the high-speed vent valve 4 on the daily fuel cabinet 2, the nitrogen in the daily fuel cabinet 2 can be discharged into the fuel storage cabinet 1, the balance of the air pressure in the daily fuel cabinet 2 and the air pressure in the fuel storage cabinet 1 is kept, the air pressure in the two cabinets is kept in a safe range, the nitrogen cannot be discharged into the external environment in the whole supply process of the methanol or the fuel oil, and the pollution to the environment is reduced, and the consumption of nitrogen is low, which is beneficial to saving nitrogen resources. In addition, nitrogen does not need to be discharged to the outside, so that the evaporation capacity of methanol or fuel oil can be effectively reduced, and the running cost of the ship is saved.
In one embodiment, the fuel storage tank 1 and the daily fuel tank 2 are connected by a first connection pipe 5, a first control valve 6 is disposed on the first connection pipe 5, and the first control valve 6 can close or open the first connection pipe 5. A first control valve 6 is provided on the first communication pipe 5 to facilitate control of closing or opening of the first communication pipe 5.
In order to improve the reliability of the replenishing system, the first communication pipe 5 comprises a first pipe 501 connected with the fuel storage cabinet 1 and a second pipe 502 connected with the daily fuel tank 2, a third pipe 503 is detachably connected between the first pipe 501 and the second pipe 502, and the first pipe 501 and the second pipe 502 are both provided with a first control valve 6. By adopting the design, the third pipe 503 can be detached from the space between the first pipe 501 and the second pipe 502 under the condition that the air pressure in the daily fuel tank 2 and the air pressure in the fuel storage tank 1 are kept balanced, and the methanol or the fuel in the fuel storage tank 1 can be still prevented from being sucked back into the daily fuel tank 2 through the first communication pipe 5 under the condition that the first control valve 6 is not tightly closed, so that double guarantee is provided for a replenishing system, and the reliability of the replenishing system is ensured.
In another implementation, the nitrogen tank 3 is connected with the fuel daily cabinet 2 through a second communicating pipe 9, and a second control valve 7 is arranged on the second communicating pipe 9. And a second control valve 7 is arranged on the second communicating pipe 9, so that the nitrogen tank 3 can be conveniently controlled to be communicated with the daily fuel cabinet 2.
Preferably, the second communicating pipe 9 is further provided with a first check valve 11, the second control valve 7 is disposed near the nitrogen tank 3, and the first check valve 11 is disposed near the daily fuel tank 2. Through setting up first check valve 11, prevent effectively that the inside gas of fuel daily cabinet 2 from flowing back to in the second communicating pipe 9.
In order to control the communication between the fuel storage cabinet 1 and the daily fuel tank 2, a third control valve 8 is arranged on the supply pipe 10, and the third control valve 8 can open or close the supply pipe 10.
Specifically, two third control valves 8 are provided, and a second check valve 12 is further provided on the supply pipe 10, and the second check valve 12 is distributed between the two third control valves 8. Two third control valves 8 are provided on the supply line 10 to provide a double guarantee of opening and closing of the supply line 10, and the second check valve 12 prevents the backflow of methanol or fuel inside the fuel storage tank 1 and the day tank 2.
Wherein, a supply pump 13 is arranged in the fuel storage cabinet 1, the supply pump 13 is connected with a supply pipe 10, and a fuel pump 14 is arranged between the daily fuel cabinet 2 and the main machine. The replenishing pump 13 is used for conveying methanol or fuel oil in the fuel storage cabinet 1 into the daily fuel cabinet 2 through the replenishing pipe 10 to realize the fuel replenishment of the daily fuel cabinet 2, and the fuel pump 14 is used for conveying the fuel in the daily fuel cabinet 2 to a main engine of a ship to ensure the normal operation of the main engine.
This replenishment system still includes level sensor (not shown in the figure), first atmospheric pressure monitor (not shown in the figure), second atmospheric pressure monitor (not shown in the figure) and controller (not shown in the figure), level sensor is used for monitoring the liquid level of the inside methyl alcohol of daily cabinet 2 of fuel or fuel, first atmospheric pressure monitor is used for monitoring the inside atmospheric pressure of fuel storage cabinet 1, second atmospheric pressure monitor is used for monitoring the inside atmospheric pressure of daily cabinet 2 of fuel, level sensor, first atmospheric pressure monitor, second atmospheric pressure monitor and controller all with the control system communication connection of boats and ships, first control valve 6, opening or closing of second control valve 7 and third control valve 8 passes through the controller control, replenishing pump 13 and controller communication connection. The liquid level sensor transmits the detected liquid level information of the daily fuel cabinet 2 to the control system, when the detected liquid level is smaller than the set liquid level inside the daily fuel cabinet 2, the control system controls the third control valve 8 to be opened and controls the supply pump 13 to be started through the controller, methanol or fuel is automatically supplied to the daily fuel cabinet 2, the liquid level sensor monitors the liquid level inside the daily fuel cabinet 2 in real time, when the detected liquid level inside the daily fuel cabinet 2 reaches the set maximum value, the information is transmitted to the main control system, the main control system closes the supply pump 13 and the third control valve 8 through the controller, and the supply operation is stopped. When the first air pressure monitor monitors that the air pressure in the fuel storage cabinet 1 is reduced and the second air pressure monitor monitors that the air pressure in the fuel daily cabinet 2 is increased, the information is transmitted to the control system, the control system controls the first control valve 6 to be opened through the controller, part of air in the fuel daily cabinet 2 is conveyed into the fuel storage cabinet 1, when the first air pressure monitor monitors that the air pressure in the fuel storage cabinet 1 and the air pressure in the fuel daily cabinet 2 monitored by the second air pressure monitor are kept unchanged in a set time period, the state that the air pressures in the fuel storage cabinet 1 and the fuel daily cabinet 2 are balanced is represented, and the main control system controls the first control valve 6 to be closed through the controller; when the second air pressure monitor detects that the air pressure inside the daily fuel cabinet 2 is reduced and the first air pressure monitor detects that the air pressure inside the fuel storage cabinet 1 is unchanged, the information is transmitted to the main control system, the main control system controls the second control valve 7 to be opened through the controller, the nitrogen tank 3 is used for inputting nitrogen into the daily fuel cabinet 2, and when the second air pressure monitor detects that the air pressure inside the daily fuel cabinet 2 reaches a set range value, the controller controls the second control valve 7 to be closed. The replenishing system with the structure can completely realize automatic replenishing of fuel and automatically control the air pressure balance in the cabinet body.
In the embodiment, a use method of the replenishment system of the methanol dual-fuel ship daily cabinet is also provided, and the replenishment system is applied to the replenishment system of the methanol dual-fuel ship daily cabinet in any one of the embodiments. The use method of the replenishment system comprises the following steps: when methanol or fuel inside the daily fuel cabinet 2 is consumed and the air pressure inside the daily fuel cabinet 2 is reduced, the nitrogen tank 3 inputs nitrogen into the daily fuel cabinet 2 to keep the air pressure inside the daily fuel cabinet 2 within a set range, when the liquid level inside the daily fuel cabinet 2 is reduced to a set height, the daily fuel cabinet 1 supplies methanol or fuel into the daily fuel cabinet 2 through the supply pipe 10, and the daily fuel cabinet 2 supplies nitrogen to the daily fuel cabinet 1 through the high-speed vent valve 4 to keep the air pressure inside the daily fuel cabinet 2 and the air pressure inside the daily fuel cabinet 1 balanced. The using method of the replenishment system has less consumption of nitrogen and reduces the pollution to the environment.
The methanol consumption of the 5-ten-thousand-ton ship is 3.26L/h, the set pressure of the high-speed vent valve 4 is 20KPa, and the nitrogen consumption under the standard atmospheric pressure is estimated to be about 94L per day by using the replenishment system of the daily tank of the methanol dual-fuel ship on average.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (8)
1. The replenishing system of the methanol dual-fuel ship daily cabinet is characterized by comprising a fuel storage cabinet, a fuel daily cabinet and a nitrogen tank selectively communicated with the fuel daily cabinet, wherein the fuel storage cabinet is connected with the fuel daily cabinet through a replenishing pipe, the fuel storage cabinet is used for storing methanol and fuel oil, the fuel daily cabinet is used for pumping the methanol or the fuel oil in the fuel storage cabinet and supplying the methanol or the fuel oil to a host of a ship, the fuel storage cabinet and the fuel daily cabinet are both connected with high-speed vent valves, and the high-speed vent valves on the fuel storage cabinet are selectively communicated with the high-speed vent valves on the fuel daily cabinet;
the fuel storage cabinet is connected with the fuel daily cabinet through a first communication pipe, a first control valve is arranged on the first communication pipe, and the first control valve can close or open the first communication pipe;
the first connecting pipe comprises a first pipe connected with the fuel storage cabinet and a second pipe connected with the fuel daily cabinet, a third pipe is detachably connected between the first pipe and the second pipe, and the first pipe and the second pipe are provided with the first control valve.
2. The replenishment system of a daily cabinet of a methanol dual-fuel ship as claimed in claim 1, wherein the nitrogen tank is connected with the daily cabinet of fuel through a second communicating pipe, and a second control valve is arranged on the second communicating pipe.
3. The replenishment system of a daily cabinet for a methanol dual-fuel ship as claimed in claim 2, wherein a third control valve is arranged on the replenishment pipe.
4. The replenishment system of a daily cabinet for a methanol dual-fuel ship as claimed in claim 3, wherein the number of the third control valves is two, and the replenishment pipe is further provided with a second check valve, and the second check valve is distributed between the two third control valves.
5. The replenishment system of a daily cabinet for a methanol dual-fuel ship as claimed in claim 3, wherein a replenishment pump is arranged in the fuel storage cabinet, the replenishment pump is connected with the replenishment pipe, and a fuel pump is arranged between the daily cabinet for fuel and the main engine.
6. The replenishment system of a methanol dual-fuel marine day tank as claimed in claim 5, wherein a liquid level sensor is arranged inside the fuel day tank, and the liquid level sensor is used for monitoring the liquid level of the methanol or the fuel oil inside the fuel day tank.
7. The replenishment system of a methanol dual-fuel marine day tank of claim 6, further comprising a liquid level sensor for monitoring the liquid level of the methanol or the fuel oil inside the fuel day tank, a first air pressure monitor for monitoring the air pressure inside the fuel storage tank, a second air pressure monitor for monitoring the air pressure inside the fuel day tank, and a controller, the liquid level sensor, the first air pressure monitor, the second air pressure monitor, and the controller are all in communication connection with a control system of a marine vessel, the opening or closing of the first control valve, the second control valve, and the third control valve is controlled by the controller, and the replenishment pump is in communication connection with the controller.
8. Use of the replenishment system of the daily tank of a methanol dual-fuel ship as claimed in any one of claims 1 to 7, characterized by comprising the following steps: when methanol or fuel oil in the daily fuel cabinet is consumed and the air pressure in the daily fuel cabinet is reduced, a nitrogen tank inputs nitrogen gas into the daily fuel cabinet to keep the air pressure in the daily fuel cabinet within a set range, when the liquid level in the daily fuel cabinet is reduced to a set height, the daily fuel cabinet supplies the methanol or the fuel oil to the daily fuel cabinet through a supply pipe, and the daily fuel cabinet conveys the nitrogen gas to the daily fuel cabinet through a high-speed vent valve to keep the air pressure in the daily fuel cabinet and the air pressure in the daily fuel cabinet balanced.
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| CN202110725606.1A CN113291446B (en) | 2021-06-29 | 2021-06-29 | Supply system of methanol dual-fuel ship daily cabinet and use method thereof |
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| CN202110725606.1A CN113291446B (en) | 2021-06-29 | 2021-06-29 | Supply system of methanol dual-fuel ship daily cabinet and use method thereof |
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| CN116001978B (en) * | 2023-01-06 | 2023-11-10 | 福建国安船业有限公司 | Daily oil and power oil transition method, system device and medium for ferry |
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