WO2021031197A1 - Système d'alimentation en carburant et procédé d'alimentation en carburant - Google Patents

Système d'alimentation en carburant et procédé d'alimentation en carburant Download PDF

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Publication number
WO2021031197A1
WO2021031197A1 PCT/CN2019/102031 CN2019102031W WO2021031197A1 WO 2021031197 A1 WO2021031197 A1 WO 2021031197A1 CN 2019102031 W CN2019102031 W CN 2019102031W WO 2021031197 A1 WO2021031197 A1 WO 2021031197A1
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Prior art keywords
feeding
liquid level
time
feeding device
delivery pump
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PCT/CN2019/102031
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English (en)
Chinese (zh)
Inventor
金贤
李慧霖
黄博
张春涛
左文安
Original Assignee
中集船舶海洋工程设计研究院有限公司
中国国际海运集装箱(集团)股份有限公司
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Priority to PCT/CN2019/102031 priority Critical patent/WO2021031197A1/fr
Publication of WO2021031197A1 publication Critical patent/WO2021031197A1/fr

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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
    • 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

Definitions

  • the invention relates to the technical field of natural gas fuel supply, in particular to a fuel supply system and a fuel supply method.
  • the portable fuel tank After the portable fuel tank is filled in the land-based liquefaction station, it is then fixed to the ship by hoisting or roll-on-rolling. Its "filling" operation can be completed in most of the existing port terminals, without being restricted by the water filling station. Therefore, the application of portable fuel tanks on ships has gradually gained attention.
  • the object of the present invention is to provide a fuel supply system and a fuel supply method with high feeding efficiency to solve the problems in the prior art.
  • the present invention provides a fuel supply system, including a control device, a delivery pump, and a plurality of feeding devices arranged in parallel upstream of the delivery pump; the plurality of feeding devices are connected to the delivery pump in sequence Connected and sequentially supply LNG to the outside; each of the supply devices includes: a storage tank for storing LNG; a liquid level detection device, corresponding to the storage tank, used for detecting the LNG in the storage tank Liquid level; a feeding branch, which connects the storage tank and the delivery pump; a temperature detection device, arranged on the feeding branch, for detecting the temperature of the feeding branch; wherein, the control device It is electrically connected with the liquid level detection equipment and the temperature detection equipment of each of the feeding devices; the real-time liquid level value detected by the liquid level detection device in the current feeding device reaches a first liquid level preset Value, the control device controls the feeding device to be fed to perform pre-cooling; when the temperature of the feeding branch of the feeding device to be fed is pre-cooled to the working temperature
  • the first preset value of the liquid level satisfies the following conditions:
  • the first preset value of the liquid level corresponds to the current supply time t1 that is still available in the supply device, and the pre-cooling time required for the supply branch of the supply device to be supplied is t2,
  • the feeding time t1 and the pre-cooling required time t2 have a preset difference, and the feeding time t1 is greater than the pre-cooling required time t2;
  • the feeding time t1 is calculated and analyzed by the control device according to the load condition and the real-time liquid level value detected by the liquid level detection device in the feeding device;
  • the pre-cooling required time t2 is calculated and analyzed by the control device according to the ambient temperature and the condition of the feeding branch of the feeding device to be fed.
  • the ratio of the preset difference to the pre-cooling required time t2 is (0 ⁇ 0.2):1.
  • an isolation valve and a control valve arranged downstream of the isolation valve are provided on the feeding branch; the control device is electrically connected to the isolation valve, and controls the opening of the isolation valve to make The liquefied natural gas in the storage tank pre-cools the feeding branch; the control device is electrically connected with the control valve, and the opening of the control valve is controlled to make the supply and storage tank communicate with the delivery pump.
  • the opening degree of the control valve is adjustable, and the flow rate of the LNG supplied from the feeding device can be adjusted.
  • the control device when the real-time liquid level value detected by the liquid level detection device of the feeding device reaches a second preset liquid level value, the control device also controls the feeding device Disconnected from the delivery pump and stop supplying LNG to the outside, the second preset value of the liquid level is less than the first preset value of the liquid level, and the first preset value of the liquid level and the second preset value The difference between the preset values of the liquid level corresponds to the air supply time t1.
  • a feeding sequence is preset in the control device, and a plurality of the feeding devices are controlled to communicate with the delivery pump in sequence according to the feeding sequence.
  • the present invention also provides a fuel supply method, including the following steps:
  • the control device controls the standby The feeding device for feeding is pre-cooled;
  • the temperature of the feeding branch of the feeding device to be fed is detected.
  • the control device controls the feeding
  • the feeding device is in communication with the delivery pump.
  • the control device controls the supply device to be supplied to perform pre-cooling
  • the feeding device to be fed is controlled to perform pre-cooling.
  • the ratio of the preset difference to the pre-cooling required time t2 is (0 ⁇ 0.2):1.
  • the control device when the real-time liquid level value detected by the liquid level detection device of the feeding device reaches a second preset liquid level value, the control device also controls the feeding device Disconnected from the delivery pump and stop supplying LNG to the outside, the second preset value of the liquid level is less than the first preset value of the liquid level, and the first preset value of the liquid level and the second preset value The difference between the preset values of the liquid level corresponds to the air supply time t1.
  • the flow rate of the current supply device that supplies LNG to the outside is controlled to gradually decrease until it is disconnected from the delivery pump, and the flow rate of the supply device to be supplied to supply the LNG to the outside is controlled Gradually increase until the LNG is completely supplied from the supply device to be supplied.
  • the fuel supply system of the present invention includes a control device, a delivery pump, and a plurality of feeding devices arranged in parallel upstream of the delivery pump, and the multiple feeding devices are sequentially connected with the delivery pump to sequentially supply liquefied natural gas to the outside.
  • Each feeding device includes a storage tank, liquid level detection equipment, temperature detection equipment and a feeding branch.
  • the control device is electrically connected to the liquid level detection equipment and temperature detection equipment of each feeding device.
  • the control device controls the feeding device to be fed to perform pre-cooling; in the feeding device to be fed
  • the control device controls the feeding device to be fed to communicate with the delivery pump. Therefore, the feeding device to be fed is pre-cooled in advance, which shortens the waiting time for switching between the current feeding device and the feeding device, and improves the efficiency.
  • the feeding device to be supplied is controlled to be pre-cooled in advance in a suitable time, so that when the feeding device is pre-cooled to the working temperature, the current feeding device just cannot feed or can still feed, so as to realize the current feeding
  • the seamless switch between the device and the device to be supplied realizes the continuous supply of liquefied natural gas to the outside.
  • the fuel supply method of the present invention provides liquefied natural gas to the outside by controlling each feeding device to communicate with the delivery pump in turn.
  • controlling the feeding device with feeding to pre-cool in advance the gap between the current feeding device and the feeding device is shortened.
  • the waiting time of handover improves efficiency.
  • Fig. 1 is a schematic structural diagram of an embodiment of the fuel supply system of the present invention
  • Fuel supply system 11. Control device; 121, first storage tank; 122, first storage tank isolation valve; 123, first isolation valve; 124, first pressure detection equipment; 125, first temperature detection equipment; 126. First control valve; 127. First safety equipment; 131. Second storage tank; 132. Second storage tank isolation valve; 133. Second isolation valve; 134. Second pressure detection equipment; 135. Second temperature Testing equipment; 136, the second control valve; 137, the second safety equipment.
  • the present invention provides a fuel supply system that provides liquefied natural gas for natural gas powered ships.
  • Natural gas-powered ships mainly include hulls and engines.
  • the fuel supply system provides natural gas to the engine, which in turn provides power for the movement of the hull.
  • the fuel supply system is installed on the hull.
  • the fuel supply system 1 in the present invention mainly includes a control device 11, a delivery pump (not shown in the figure), and a plurality of feeding devices arranged in parallel upstream of the delivery pump.
  • the control device 11 controls a plurality of feeding devices to be sequentially connected with the delivery pump to sequentially supply liquefied natural gas to the hull, and the switching between the feeding devices is seamlessly connected to realize continuous liquid supply.
  • the fuel supply system 1 includes two feeding devices, a first feeding device and a second feeding device, respectively.
  • the first feeding device, the second feeding device and the control device 11 will be described in detail below.
  • the first supply device includes a first storage tank 121, a first storage tank isolation valve 122, a first supply branch, a first liquid level detection device, a first isolation valve 123, a first pressure detection device 124, and a first temperature
  • the detection device 125, the first control valve 126, and the first safety device 127 includes a first storage tank 121, a first storage tank isolation valve 122, a first supply branch, a first liquid level detection device, a first isolation valve 123, a first pressure detection device 124, and a first temperature The detection device 125, the first control valve 126, and the first safety device 127.
  • the first storage tank 121 uses a tank container as a fuel tank to provide fuel for the gas-powered ship.
  • the first storage tank 121 includes a tank body for containing liquefied natural gas and a frame supporting the tank body.
  • the corner pieces on the frame can facilitate the lifting of the first storage tank 121 and the locking on the natural gas-powered ship, realize the rapid disassembly and installation of the first storage tank 121, and also ensure that the first storage tank 121 is on the natural gas-powered ship. stability.
  • the tank has an inlet end and an outlet end.
  • the inlet end is used to fill LNG, and the outlet end is used to output LNG.
  • the inlet end is located at the upper part of the tank body, and the outlet end is located at the lower part of the tank body.
  • the outlet end can also be used for filling of liquefied natural gas.
  • a first storage tank shut-off valve 122 is provided at the outlet end of the tank body, which is used to control the connection between the first storage tank 121 and the outside world. It can cut off the first storage tank when the first feeding device has liquefied natural gas leakage or needs maintenance. 121 is connected to the outside world to prevent the output of liquefied natural gas, ensuring the safe use of the first feeding device.
  • the first liquid level detection device is set corresponding to the first storage tank 121 and is used to detect the real-time liquid level value of the liquefied natural gas.
  • the first liquid level detection device is a liquid level sensor, which is arranged inside the tank.
  • the first feeding branch connects the first storage tank 121 and the delivery pump. Specifically, the first feed branch is connected to the outlet end of the tank body, so that the liquefied natural gas in the first storage tank 121 can be transported to the engine through the transfer pump.
  • the first feeding branch has a working temperature, and the first feeding branch can communicate with the delivery pump at this working temperature, so that the temperature of the liquefied natural gas entering the delivery pump meets the requirements of the delivery pump.
  • the working temperature is -40°C.
  • the first feed branch is pre-cooled by the liquefied natural gas in the first storage tank 121.
  • the temperature of the liquefied natural gas is usually -163°C, which is much lower than the working temperature of the first feed branch, so as to cool the first feed branch.
  • the time t1 required for the pre-cooling of the first feeding branch to the working temperature is related to the length, arrangement, and ambient temperature of the first feeding branch.
  • the first isolation valve 123 is arranged on the first feeding branch and used to control the on-off between the first storage tank 121 and the first feeding branch.
  • the first isolation valve 123 is opened, the first feeding branch is connected to the first storage tank 121, and the LNG in the first storage tank 121 enters the first feeding branch to cool the first feeding branch; the first isolation The valve 123 is closed, the first feeding branch is disconnected from the first storage tank 121, and the LNG in the first storage tank 121 cannot enter the first feeding branch.
  • the first control valve 126 is arranged on the first feeding branch and located downstream of the first isolation valve 123.
  • the first control valve 126 is used to control the on-off between the first feeding branch and the delivery pump.
  • the first control valve 126 is opened, the first feeding branch is connected to the delivery pump, and the liquefied natural gas in the first storage tank 121 is delivered to the delivery pump through the first feeding branch to provide liquefied natural gas to the engine; the first control valve 126 When closed, the first feeding branch is disconnected from the delivery pump, and the first storage tank 121 is stopped from supplying LNG to the outside.
  • the opening degree of the first control valve 126 is adjustable. Therefore, by adjusting the opening degree of the first control valve 126, the flow rate of the liquefied natural gas provided by the first feeding device to the delivery pump can be adjusted.
  • the first pressure detection device 124 is arranged on the first feeding branch and located between the first isolation valve 123 and the first control valve 126.
  • the first pressure detecting device 124 is used to detect the pressure value on the first feeding branch, so as to monitor the first feeding branch in real time, and ensure the safety of the first feeding device.
  • the first pressure detection device 124 is a pressure sensor.
  • the first temperature detection device 125 is arranged on the first feeding branch road and is located between the first pressure detection device 124 and the first control valve 126.
  • the first temperature detecting device 125 is used to detect the temperature value on the first feeding branch to confirm whether the first feeding branch is cooled to the working temperature.
  • the first temperature detection device 125 is a temperature sensor.
  • the first safety device 127 is arranged on the first feeding branch road and is located between the first temperature detection device 125 and the first control valve 126.
  • the first safety device 127 is a safety valve.
  • the inlet end of the first safety device 127 is connected to the first feeding branch, and the outlet end is in communication with the outside air.
  • the first safety device 127 has a safety pressure value. When the pressure value on the first feeding branch is greater than the safety pressure value, the first safety device 127 is turned on, and the gas is released to the outside through the first safety device 127, thereby reducing the first The pressure of the feeding branch ensures the safety of the first feeding device.
  • the second feeding device is arranged in parallel with the first feeding device.
  • the second supply device includes a second storage tank 131, a second storage tank isolation valve 132, a second supply branch, a second liquid level detection device, a second isolation valve 133, a second pressure detection device 134, and a second temperature
  • the detection device 135, the second control valve 136, and the second safety device 137 is the same as the structure of the first feeding device, and the description of the first feeding device can be referred to, which will not be repeated here.
  • the control device 11 is electrically connected to the engine of the natural gas-powered ship, and receives the load condition of the engine, that is, the gas consumption rate of the engine at the current load rate of the engine.
  • the feeding sequence of the first feeding device and the second feeding device is preset in the control device 11, and according to the feeding sequence, the first feeding device and the second feeding device are controlled to feed sequentially according to the feeding sequence.
  • the control device 11 is electrically connected to the first feeding device and the second feeding device, respectively.
  • control device 11 controls the electrical connection between the control device 11 and the first feeding device.
  • the control device 11 is electrically connected with the first storage tank isolation valve 122, and controls the opening or closing of the first storage tank isolation valve 122, thereby controlling the communication or disconnection of the first storage tank 121 with the outside.
  • the control device 11 is electrically connected to the first isolation valve 123, controls the opening or closing of the first isolation valve 123, and controls the communication or disconnection between the first feeding branch and the first storage tank 121.
  • the control device 11 is electrically connected with the first liquid level detection device, and receives the real-time liquid level value detected by the first liquid level detection device.
  • the control device 11 is electrically connected to the first pressure detecting device 124, and receives the real-time pressure detected by the first pressure detecting device 124 to monitor the pressure on the first feeding branch. When the real-time pressure detected by the first pressure detection device 124 reaches the preset safety pressure, the control device 11 controls the warning device to issue a warning signal.
  • the warning device can be a warning light, and the warning signal can be a red light flashing.
  • the warning device can also be a warning speaker, and the warning signal can be a sound.
  • the control device 11 is electrically connected to the first temperature detection device 125, and receives temperature information detected by the first temperature detection device 125 to monitor the temperature on the first feeding branch in real time, and then determine whether the temperature on the first feeding branch is pre-cooled to Operating temperature.
  • the control device 11 is electrically connected to the first control valve 126 to control the opening, closing, and opening of the first control valve 126, thereby controlling the first feeding device to deliver LNG to the delivery pump and the flow rate of delivery of the LNG.
  • the electrical connection between the control device 11 and the second feeding device can refer to the electrical connection between the control device 11 and the first feeding device, which will not be repeated here.
  • control device 11 controls the first feeding device to communicate with the delivery pump first according to the feeding sequence, so that the first feeding device first supplies LNG to the engine.
  • the control device 11 is preset with a first liquid level preset value, and when the real-time liquid level value in the first feeding device reaches the first liquid level preset value, the control device 11 controls the second feeding device to perform pre-cooling.
  • the conditions for the preset value of the first liquid level are as follows:
  • the control device 11 calculates and analyzes the real-time liquid level value detected by the first liquid level detection device in the first feeding device according to the load condition and obtains the feeding time t1 that is still available in the first feeding device.
  • the load situation refers to the gas consumption rate of the engine at the current load rate.
  • the control device 11 calculates and analyzes the condition of the feeding branch of the second feeding device according to the ambient temperature, and obtains the time t2 required for pre-cooling.
  • the ambient temperature refers to the real-time temperature value detected by the second temperature detection device 135.
  • the condition of the feed branch mainly refers to the length and layout of the branch.
  • the control device 11 determines the time difference between the feeding time t1 and the pre-cooling required time t2.
  • control device 11 controls the second isolation valve 133 of the second feeding device to open, so that the LNG in the second storage tank 131 enters the second feeding branch for pre-cooling.
  • the feeding time t1 is less than the pre-cooling time t2
  • the temperature of the second storage tank 131 has not yet cooled to the working temperature, but the first storage tank 121 and the second storage tank 121 are still shortened.
  • the waiting time for switching between storage tanks 131 That is, the second storage tank 131 is pre-cooled in advance to shorten the waiting time for switching between the two storage tanks.
  • the feeding time t1 is equal to the pre-cooling required time t2
  • the temperature of the second storage tank 131 just reaches the working temperature and can communicate with the delivery pump, thereby realizing the first storage tank 121 and Switching between the second storage tanks 131 without waiting between the two, saving time.
  • the first storage tank 121 can still supply materials, and the first storage tank 121 and the second storage tank 131 are at the same time It is connected to the delivery pump and supplies materials at the same time.
  • the second storage tank 131 supplies materials to realize the switching between the first storage tank 121 and the second storage tank 131. No need to wait in between, saving time.
  • the ratio of the preset difference to the pre-cooling time t2 is (0 ⁇ 0.2):1, that is, the preset difference is between 0 and (0.2 ⁇ the pre-cooling time t2), and the first
  • the seamless switching between the storage tank 121 and the second storage tank 131 realizes continuous feeding.
  • the first preset value of the liquid level is the liquid level of the first storage tank 121 corresponding to the feeding time t1, that is, the preset difference + the pre-cooling required time, that is, the liquid level corresponding to the time from t2 to 1.2t2.
  • the control device 11 receives the real-time temperature of the second temperature detection device 135. When the real-time temperature reaches the working temperature, the control device 11 controls the second control valve 136 to open, so that the second feeding device communicates with the delivery pump to provide liquefied natural gas to the delivery pump .
  • the control device 11 is also preset with a second liquid level preset value of the first storage tank 121.
  • the control device 11 controls The first control valve 126 is closed to disconnect the communication with the transfer pump, and stop the supply of liquefied natural gas to the transfer pump.
  • the second liquid level preset value is less than the first liquid level preset value, and the second liquid level preset value may be 3% to 5% of the liquid level height of the first storage tank 121.
  • the feeding time t1 is calculated according to the load condition and the difference between the first preset value and the second preset value of the liquid level. That is, the ratio of the amount of liquefied natural gas corresponding to the difference between the first preset value and the second preset value of the liquid level to the fuel consumption rate of the engine is converted to obtain the feeding time t1.
  • control device 11 can also control the first control valve 126 to slowly close, that is, control the opening of the first control valve 126 to gradually decrease until the first control valve 126 is completely closed, so that the first feeding device delivers the liquefaction to the delivery pump. The flow of natural gas is gradually reduced until the delivery stops.
  • the control device 11 can also control the second control valve 136 to open slowly, that is, control the opening of the second control valve 136 to gradually increase until the second control valve 136 is fully opened, so that the second feeding device provides the flow of liquefied natural gas to the outside gradually. Raise until the LNG is completely supplied from the second feeding device.
  • a gasification device for gasifying liquefied natural gas into gas is arranged between the transfer pump and the engine, and the gasified gas is used for combustion by the engine to generate kinetic energy, thereby providing power for the hull.
  • the multiple feeding devices in the fuel supply system 1 share a delivery pump, which reduces the usage of the delivery pump, thereby saving costs.
  • the present invention also provides a fuel supply method, adopting the above-mentioned fuel supply system 1, including the following steps:
  • the feeding sequence is that the first feeding device feeds first, and the second feeding device feeds later.
  • the second feeding device may also feed the material first.
  • the control device 11 controls the second feeding device.
  • the material device is pre-cooled.
  • the control device 11 calculates and analyzes the real-time liquid level value detected by the first liquid level detection device according to the load condition, and obtains the supply time t1 that is still available in the first supply device.
  • the load condition refers to the gas consumption rate of the engine at the current load rate.
  • the real-time liquid level value is converted into the amount of liquefied natural gas in the first storage tank 121, and then the ratio of the gas consumption rate of the engine is converted to obtain the remaining feeding time t1 of the first storage tank 121.
  • the control device 11 calculates and analyzes the required pre-cooling time t2 of the second feeding device according to the ambient temperature and the condition of the second feeding branch.
  • the ambient temperature refers to the real-time temperature value detected by the second temperature detection device 135.
  • the condition of the feed branch mainly refers to the length and layout of the branch.
  • the feeding time t1 is less than the pre-cooling time t2
  • the first storage tank 121 cannot supply the material
  • the temperature of the second storage tank 131 has not yet cooled to the working temperature, but the first storage tank 121 and the second storage tank 121 are still shortened.
  • the waiting time for switching between storage tanks 131 That is, by pre-cooling the second storage tank 131 in advance, the waiting time for switching between the two storage tanks is shortened, and the feeding efficiency of the fuel supply system 1 is improved.
  • the feeding time t1 is equal to the pre-cooling required time t2
  • the temperature of the second storage tank 131 just reaches the working temperature and can communicate with the delivery pump, thereby realizing the first storage tank 121 and Switching between the second storage tanks 131 without waiting between the two, saving time.
  • the first storage tank 121 can still supply materials, and the first storage tank 121 and the second storage tank 131 are at the same time It is connected to the delivery pump and supplies materials at the same time.
  • the second storage tank 131 supplies materials to realize the switching between the first storage tank 121 and the second storage tank 131. No need to wait in between, saving time.
  • the ratio of the preset difference to the pre-cooling time t2 is (0 ⁇ 0.2):1, that is, the preset difference is between 0 and (0.2 ⁇ the pre-cooling time t2), and the first
  • the seamless switching between the storage tank 121 and the second storage tank 131 realizes continuous feeding.
  • the first preset value of the liquid level is the liquid level of the first storage tank 121 corresponding to the feeding time t1, that is, the preset difference + the pre-cooling required time, that is, the liquid level corresponding to the time from t2 to 1.2t2.
  • the ratio of the preset difference to the pre-cooling time t2 is (0 ⁇ 0.2):1, that is, the preset difference is between 0 and (0.2 ⁇ the pre-cooling time t2).
  • the preset value of the first liquid level is the liquid level of the first storage tank 121 corresponding to the feeding time t1, that is, the preset difference + the time required for pre-cooling, which is the liquid level value corresponding to the time from t2 to 1.2t2 .
  • the temperature of the LNG is relatively low, usually -163°C.
  • the working temperature of the second feed branch is usually -40°C.
  • the second temperature detection device 135 detects the real-time temperature of the second feeding branch, and the control device 11 receives the real-time temperature and compares it with the working temperature.
  • the control device 11 controls the second control valve 136 to open when the real-time temperature sent by the second temperature detection device 135 reaches the pre-cooling temperature.
  • the second control valve 136 opens slowly. That is, the opening degree of the second control valve 136 gradually increases until it is fully opened, so that the flow rate of the liquefied natural gas delivered by the second feeding device to the delivery pump gradually increases until it no longer increases.
  • control device 11 When the real-time liquid level value detected by the first liquid level detection device of the first feeding device reaches the second preset value of the liquid level, the control device 11 also controls the first feeding device to be disconnected from the delivery pump and stop feeding Liquefied natural gas is provided outside.
  • the second liquid level preset value is smaller than the first liquid level preset value, and the difference between the first liquid level preset value and the second liquid level preset value corresponds to the air supply time t1.
  • the control device 11 controls the second isolation valve 133 to open to pre-cool the second feeding branch in advance, which can shorten the first The waiting time for switching between a feeding device and a second feeding device.
  • the second feeding branch of the second feeding device is cooled to the working temperature, the liquid level of the first storage tank 121 just drops to the preset second level, and the first feeding device Stop feeding, and the second feeding device starts feeding.
  • the preset difference is greater than 0, after the temperature of the second feeding device is pre-cooled to the working temperature, the real-time liquid level of the first feeding device does not reach the preset second liquid level. At this time, the first feeding device Both the second feeding device and the second feeding device are connected with the conveying pump, and both feed at the same time.
  • the first control valve 126 is slowly closed, that is, the opening degree of the first control valve 126 is gradually reduced until it is completely closed, so that the flow rate of the liquefied natural gas delivered by the first feeding device to the delivery pump is gradually reduced until it stops. Transfer liquefied natural gas to the transfer pump.
  • the fuel supply method controls the first feeding device and the second feeding device to communicate with the transfer pump in order to provide liquefied natural gas to the outside, which reduces the number of transfer pumps and reduces the cost. Moreover, the first feeding device and the second feeding device are seamlessly connected to realize continuous fuel supply.
  • the fuel supply system 1 may also include three feeding devices, four feeding devices, or other number of feeding devices.
  • the control device 11 controls the feeding device to communicate with the delivery pump in sequence according to the preset feeding sequence to provide fuel to the engine. For the connection and switching between the two adjacent feeding devices in the feeding sequence, refer to the first feeding device and the second feeding device, which will not be repeated here.
  • the feeding order can be sorted according to the pre-cooling time of each feeding device, for example, feeding materials in order from small to large pre-cooling time.
  • the feeding sequence can also be sorted according to the position of each feeding device on the hull, for example, feeding sequentially according to the distance between the feeding device and the engine.
  • the fuel supply system of the present invention includes a control device, a delivery pump, and a plurality of feeding devices arranged in parallel upstream of the delivery pump, and the multiple feeding devices are sequentially connected with the delivery pump to sequentially supply liquefied natural gas to the outside.
  • Each feeding device includes a storage tank, liquid level detection equipment, temperature detection equipment and a feeding branch.
  • the control device is electrically connected with liquid level detection equipment and temperature detection equipment of each feeding device.
  • the control device controls the feeding device to be fed to perform pre-cooling; in the feeding device to be fed
  • the control device controls the feeding device to be fed to communicate with the delivery pump. Therefore, the feeding device to be fed is pre-cooled in advance, which shortens the waiting time for switching between the current feeding device and the feeding device, and improves the efficiency.
  • the feeding device to be supplied is controlled to be pre-cooled in advance in a suitable time, so that when the feeding device is pre-cooled to the working temperature, the current feeding device just cannot feed or can still feed, so as to realize the current feeding
  • the seamless switching between the device and the device to be supplied realizes the continuous supply of LNG to the outside.
  • the fuel supply method of the present invention provides liquefied natural gas to the outside by controlling each feeding device to communicate with the delivery pump in turn.
  • controlling the feeding device with feeding to pre-cool in advance the gap between the current feeding device and the feeding device is shortened.
  • the waiting time of handover improves efficiency.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne un système (1) d'alimentation en carburant et un procédé d'alimentation en carburant. Le système d'alimentation en carburant comprend un dispositif de commande (11), une pompe d'alimentation et une pluralité de dispositifs d'alimentation agencés parallèlement en amont de la pompe d'alimentation. La pluralité de dispositifs d'alimentation communiquent successivement avec la pompe d'alimentation pour fournir successivement du gaz naturel liquéfié à l'extérieur. Chaque dispositif d'alimentation comprend un réservoir de stockage (121, 131), un dispositif de détection de niveau de liquide, une branche d'alimentation et un dispositif (125, 135) de détection de température. Les dispositifs de détection de niveau de liquide sont agencés de façon à correspondre aux réservoirs de stockage et sont utilisés pour détecter le niveau de liquide de gaz naturel liquéfié. Les branches d'alimentation relient les réservoirs de stockage et les pompes d'alimentation. Les dispositifs de détection de température sont disposés sur les branches d'alimentation. Le dispositif de commande est connecté électriquement au dispositif de détection de niveau de liquide et au dispositif de détection de température de chaque dispositif d'alimentation. Lorsqu'une valeur de niveau de liquide en temps réel détectée par le dispositif de détection de niveau de liquide dans un dispositif d'alimentation actuel atteint une première valeur de niveau de liquide prédéfinie, le dispositif de commande commande le dispositif d'alimentation pour alimenter en pré-refroidissement ; et lorsque la branche d'alimentation du dispositif d'alimentation est pré-refroidie à une température de travail, le dispositif de commande commande le dispositif d'alimentation pour communiquer avec la pompe d'alimentation.
PCT/CN2019/102031 2019-08-22 2019-08-22 Système d'alimentation en carburant et procédé d'alimentation en carburant WO2021031197A1 (fr)

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JP2013193503A (ja) * 2012-03-16 2013-09-30 Kawasaki Heavy Ind Ltd 舶用推進システム及び船舶
CN104197183A (zh) * 2014-01-27 2014-12-10 江苏海企港华燃气发展有限公司 一种水上天然气加注站工艺流程及加注装置
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