CN112498649A - Energy storage method for recycling LNG transport ship volatile gas - Google Patents
Energy storage method for recycling LNG transport ship volatile gas Download PDFInfo
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- CN112498649A CN112498649A CN202011363400.0A CN202011363400A CN112498649A CN 112498649 A CN112498649 A CN 112498649A CN 202011363400 A CN202011363400 A CN 202011363400A CN 112498649 A CN112498649 A CN 112498649A
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- natural gas
- cargo tank
- liquid cargo
- generator set
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J3/00—Driving of auxiliaries
- B63J3/04—Driving of auxiliaries from power plant other than propulsion power plant
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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
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
- B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J3/00—Driving of auxiliaries
- B63J2003/001—Driving of auxiliaries characterised by type of power supply, or power transmission, e.g. by using electric power or steam
- B63J2003/002—Driving of auxiliaries characterised by type of power supply, or power transmission, e.g. by using electric power or steam by using electric power
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an energy storage method for recycling LNG carrier volatile gas, which adopts a special energy storage system for recycling LNG carrier volatile gas, and comprises a liquid cargo tank, an integrated control system, a dual-fuel generator set, a natural gas burning tower, natural gas using equipment, a distribution panel, a storage battery pack and a pressure sensor; the pressure sensor is communicated with the inside of the liquid cargo tank, the liquid cargo tank is connected with the dual-fuel generator set through a branch pipe of the gas pipeline, the liquid cargo tank is connected with the natural gas burning tower through another branch pipe of the gas pipeline, the liquid cargo tank is connected with the natural gas using equipment through another branch pipe of the gas pipeline, the dual-fuel generator set is connected with the distribution board through a cable, and the distribution board is connected with the storage battery set. According to the invention, the storage battery pack is added in the power distribution network, so that the volatile gas which is burnt by the natural gas burning tower is generated by the dual-fuel generator set and stored in the storage battery pack, the economic performance of the ship is improved, and the utilization rate of the volatile gas is improved.
Description
Technical Field
The invention belongs to the technical field of ship construction, and particularly relates to an energy storage method for recycling liquefied gas of an LNG transport ship.
Background
The natural gas burning tower is one of the common volatile gas treatment facilities on the LNG transport ship, and its main effect has two: firstly, when the liquid cargo tank is warmed or filled, the mixed gas of natural gas (the main component is methane) and nitrogen which is blown from the liquid cargo tank is combusted; secondly, in the LNG transportation process, liquefied natural gas can be volatile constantly, and partial volatile gas can be consumed by dual-fuel generator and other volatile gas use equipment, and remaining volatile gas if not in time handle, can make cabin pressure rise continuously, and too high cabin pressure can lead to the fact destruction to the cargo tank, so generally consume through the natural gas burning tower, and then control cabin pressure in safe range.
In addition, with the continuous improvement of the emission requirements of ships and the effective enforcement of some mandatory regulations, the application of the dual-fuel generator is wider and wider, and particularly on LNG transport ships, the use of the dual-fuel generator can not only improve the utilization rate of volatile gas, reduce the use of fuel oil and reduce the operation cost of the ships, but also reduce the emission of sulfides, thereby meeting the requirements of relevant specifications.
In fact, the user who uses the volatile gas on the LNG transport ship at present only has dual-fuel host computer, dual-fuel generator box dual-fuel boiler, therefore under partial operating mode, the consumption of volatile gas can be less than the volume of volatilizing far away, like boats and ships rest at the anchor ground, pier loading and unloading goods stage, in order to maintain the cabin pressure stable, have to consume unnecessary volatile gas with the natural gas burning tower, has caused the waste of resource.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an energy storage method for recycling LNG carrier volatile gas, which can monitor cabin pressure, change the power of a dual-fuel generator set according to the cabin pressure condition, convert the volatile gas which is supposed to be burnt by a natural gas burning tower into electric energy to be stored in a storage battery set as the supplement of a ship power grid, and improve the utilization rate of the volatile gas to the maximum extent.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an energy storage method for recycling LNG carrier volatile gas, which adopts a special energy storage system for recycling LNG carrier volatile gas, and comprises a liquid cargo tank, an integrated control system, a dual-fuel generator set, a natural gas burning tower, natural gas using equipment, a distribution panel, a storage battery pack and a pressure sensor;
the pressure sensor is communicated with the inside of the liquid cargo tank and used for detecting the pressure in the liquid cargo tank, and the pressure sensor is connected with the integrated control system;
the liquid cargo tank is connected with the dual-fuel generator set through a branch pipe of a gas pipeline, the dual-fuel generator set is connected with the integrated control system, the integrated control system controls the power of the dual-fuel generator set through the pressure in the liquid cargo tank, and the integrated control system controls the dual-fuel generator set to be turned on or turned off through the charging and discharging state of the storage battery pack;
the liquid cargo tank is connected with the natural gas burning tower through another branch pipe of the gas pipeline, the natural gas burning tower is connected with the integrated control system, and the integrated control system controls the power of the natural gas burning tower through the power of the dual-fuel generator set and the pressure in the liquid cargo tank;
the liquid cargo tank is connected with natural gas using equipment through another branch pipe of the gas pipeline, and the natural gas using equipment is in an operating state in a normal state;
the dual-fuel generator set is connected with the distribution board through a cable, the distribution board is connected with the storage battery pack, the distribution board is connected with the integrated control system, and the integrated control system controls the distribution board to charge or discharge the storage battery pack through the electric quantity of the storage battery pack;
the liquid cargo tank is used for storing liquefied natural gas, and the volatile gas of the liquefied natural gas is output through a gas pipeline;
the method for reusing and storing the LNG carrier volatile gas comprises the following steps:
step one, a pressure sensor monitors the pressure in a liquid cargo tank, if the pressure in the liquid cargo tank is in a stable pressure state, a dual-fuel generator set and natural gas using equipment are started, a natural gas burning tower is closed, and if the pressure in the liquid cargo tank is continuously increased, the step two is carried out;
step two, the integrated control system gradually improves the power of the dual-fuel generator set, consumes redundant volatile gas, the dual-fuel generator set charges the storage battery pack through the distribution panel, the pressure sensor continuously monitors the pressure in the liquid cargo tank until the liquid cargo tank is in a voltage stabilization state, the power of the dual-fuel generator is stopped to be increased, the power is continuously maintained to charge the storage battery pack, and when the power of the dual-fuel generator set is started to be maximum and the pressure in the liquid cargo tank is continuously increased, the step three is carried out;
step three, the integrated control system starts the natural gas burning tower, and adjusts the power of the natural gas burning tower until the dual-fuel generator is in a voltage stabilization state;
after the storage battery pack is charged, the integrated control system reduces the power of the dual-fuel generator set to be equal to the power of the marine electric equipment, controls the storage battery pack to be in a discharging state and supplies power to the distribution board, and controls cabin pressure by adjusting the power of the natural gas burning tower;
and step five, after the discharging of the storage battery pack is finished, the integrated control system closes the discharging of the storage battery pack through the distribution board, and the step one to the step four are repeated.
According to a preferable technical scheme, the natural gas incineration tower is an electronic ignition type natural gas incineration tower or a fuel ignition type natural gas incineration tower.
As a preferred technical scheme, the operation mode of the dual-fuel generator is electronic ignition or fuel ignition.
According to the preferable technical scheme, the natural gas using equipment comprises a dual-fuel host and a dual-fuel boiler, and the operation modes of the dual-fuel host and the dual-fuel boiler are an oil-burning mode and a gas-burning mode.
As a preferred technical solution, the storage battery pack is a user in a charging mode for storing electric energy, and is a power supply in a discharging mode for supplying power to other users through a distribution board.
According to the preferable technical scheme, the other users are ship electric equipment, and the ship electric equipment is connected in parallel.
As a preferable technical scheme, the liquid cargo tank is a film type liquid cargo tank.
Preferably, the distribution board is one set or multiple sets connected in series.
As a preferred technical scheme, the dual-fuel generator set comprises two dual-fuel generators which are arranged in parallel.
Compared with the prior art, the invention has the beneficial effects that:
according to the energy storage method for recycling the volatile gas of the LNG carrier, the storage battery pack is additionally arranged in the power distribution network, the volatile gas which is burnt by the natural gas burning tower is used for generating power by the dual-fuel generator set and is stored in the storage battery pack as supplement of a ship power grid, rapid load change, especially sudden load can be effectively processed, and therefore the dual-fuel generator is more smoothly loaded, in addition, the economic performance of a ship can be improved, and the utilization rate of the volatile gas is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the dual-fuel generator set of the invention.
Wherein the reference numerals are specified as follows: the system comprises a liquid cargo tank 1, natural gas 2, volatile gas 3, a gas pipeline 4, a dual-fuel generator set 5, a cable 6, a natural gas burning tower 7, natural gas using equipment 8, an integrated control system 9, a distribution board 10, a storage battery pack 11 and a pressure sensor 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
An energy storage system for recycling LNG carrier volatile gas comprises a liquid cargo tank 1, an integrated control system 9, a dual-fuel generator set 5, a natural gas burning tower 7, natural gas using equipment 8, a distribution board 10, a storage battery pack 11 and a pressure sensor 12;
the pressure sensor 12 is communicated with the inside of the liquid cargo tank 1 and used for detecting the pressure in the liquid cargo tank 1, and the pressure sensor 12 is connected with the integrated control system 9;
the liquid cargo tank 1 is connected with a dual-fuel generator set 5 through a branch pipe of a fuel gas pipeline 4, and the dual-fuel generator set 5 comprises two dual-fuel generators which are arranged in parallel. The dual-fuel generator set 5 is connected with the integrated control system 9, the integrated control system 9 controls the power of the dual-fuel generator set 5 through the pressure in the liquid cargo tank 1, and the integrated control system 9 controls the dual-fuel generator set 5 to be opened or closed through the charging and discharging state of the storage battery pack 11;
the liquid cargo tank 1 is connected with a natural gas incineration tower 7 through another branch pipe of the gas pipeline 4, and the natural gas incineration tower 7 is an electronic ignition type natural gas incineration tower or a fuel ignition type natural gas incineration tower. The natural gas incineration tower 7 is connected with an integrated control system 9, and the integrated control system 9 controls the power of the natural gas incineration tower 7 through the power of the dual-fuel generator set 5 and the pressure in the cargo tank 1.
The cargo tank 1 is connected with a natural gas using device 8 through another branch pipe of the gas pipeline 4, the natural gas using device 8 is in an operating state normally, the natural gas using device 8 comprises a dual-fuel host and a dual-fuel boiler, and the operating modes of the dual-fuel host and the dual-fuel boiler are a fuel oil mode and a gas combustion mode.
The dual-fuel generator set 5 is connected with a distribution board 10 through a cable 6, the distribution board 10 is connected with a storage battery pack 11 through the cable 6, the distribution board 10 is connected with an integrated control system 9, and the distribution board 10 is one set or a plurality of sets connected in series. The integrated control system 9 controls the distribution board 10 to charge or discharge the storage battery pack 11 through the electric quantity of the storage battery pack 11. The battery pack 11 is used for storing electric energy for the user in a charging mode and for supplying electric power to other users through the distribution board 10 for the power supply in a discharging mode. Other users are ship electric equipment, in the embodiment, the first user, the second user and the third user are included, in other embodiments, more users can be included, and the ship electric equipment is connected in parallel.
The liquid cargo tank 1 is used for storing liquefied natural gas 2, and the liquid cargo tank 1 is a film type liquid cargo tank 1. The volatile gas 3 is formed by natural volatilization of the natural gas 2 and is stored in the liquid cargo tank 1 together, and the volatile gas 3 of the liquefied natural gas 2 is output through a gas pipeline 4.
Example 2
The embodiment provides an energy storage method for recycling LNG carrier volatile gas, which comprises the following steps:
step one, a pressure sensor 12 monitors the pressure in the liquid cargo tank 1, if the pressure in the liquid cargo tank 1 is in a pressure stabilizing state, a dual-fuel generator set 5 and natural gas using equipment 8 are started, a natural gas burning tower 7 is closed, and if the pressure in the liquid cargo tank 1 is continuously increased, the step two is carried out;
step two, the integrated control system 9 gradually increases the power of the dual-fuel generator set 5, consumes the redundant volatile gas 3, the dual-fuel generator set 5 charges the storage battery pack 11 through the distribution board 10, the pressure sensor 12 continuously monitors the pressure in the liquid cargo tank 1 until the liquid cargo tank 1 is in a pressure stabilizing state, the increase of the power of the dual-fuel generator set 5 is stopped, the power is maintained to continuously charge the storage battery pack 11, and when the power of the dual-fuel generator set 5 is started to be maximum and the pressure in the liquid cargo tank 1 is continuously increased, the step three is carried out;
step three, the integrated control system 9 starts the natural gas incineration tower 7, and adjusts the power of the natural gas incineration tower 7 until the dual-fuel generator set 5 is in a voltage stabilization state;
after the storage battery pack 11 is charged, the integrated control system 9 reduces the power of the dual-fuel generator set 5 to be equal to the power of the ship electric equipment, controls the storage battery pack 11 to be in a discharging state, supplies power to the distribution board 10, is supplemented by a full ship power grid, is used for processing sudden load, enables the loading of the dual-fuel generator set 5 to be smoother, and controls cabin pressure by adjusting the power of the natural gas burning tower 7 through the integrated control system 9;
and step five, finishing the discharging of the storage battery pack 11, closing the discharging of the storage battery pack 11 by the integrated control system 9 through the distribution board 10, and repeating the step one to the step four.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.
Claims (9)
1. A method for recycling and storing energy of LNG carrier volatile gas is characterized in that a special LNG carrier volatile gas recycling and storing system is adopted, and comprises a liquid cargo tank, an integrated control system, a dual-fuel generator set, a natural gas burning tower, natural gas using equipment, a distribution panel, a storage battery pack and a pressure sensor;
the pressure sensor is communicated with the inside of the liquid cargo tank and used for detecting the pressure in the liquid cargo tank, and the pressure sensor is connected with the integrated control system;
the liquid cargo tank is connected with the dual-fuel generator set through a branch pipe of a gas pipeline, the dual-fuel generator set is connected with the integrated control system, the integrated control system controls the power of the dual-fuel generator set through the pressure in the liquid cargo tank, and the integrated control system controls the dual-fuel generator set to be turned on or turned off through the charging and discharging state of the storage battery pack;
the liquid cargo tank is connected with the natural gas burning tower through another branch pipe of the gas pipeline, the natural gas burning tower is connected with the integrated control system, and the integrated control system controls the power of the natural gas burning tower through the power of the dual-fuel generator set and the pressure in the liquid cargo tank;
the liquid cargo tank is connected with natural gas using equipment through another branch pipe of the gas pipeline, and the natural gas using equipment is in an operating state in a normal state;
the dual-fuel generator set is connected with the distribution board through a cable, the distribution board is connected with the storage battery pack, the distribution board is connected with the integrated control system, and the integrated control system controls the distribution board to charge or discharge the storage battery pack through the electric quantity of the storage battery pack;
the liquid cargo tank is used for storing liquefied natural gas, and the volatile gas of the liquefied natural gas is output through a gas pipeline;
the method for reusing and storing the LNG carrier volatile gas comprises the following steps:
step one, a pressure sensor monitors the pressure in a liquid cargo tank, if the pressure in the liquid cargo tank is in a stable pressure state, a dual-fuel generator set and natural gas using equipment are started, a natural gas burning tower is closed, and if the pressure in the liquid cargo tank is continuously increased, the step two is carried out;
step two, the integrated control system gradually improves the power of the dual-fuel generator set, consumes redundant volatile gas, the dual-fuel generator set charges the storage battery pack through the distribution panel, the pressure sensor continuously monitors the pressure in the liquid cargo tank until the liquid cargo tank is in a voltage stabilization state, the power of the dual-fuel generator is stopped to be increased, the power is continuously maintained to charge the storage battery pack, and when the power of the dual-fuel generator set is started to be maximum and the pressure in the liquid cargo tank is continuously increased, the step three is carried out;
step three, the integrated control system starts the natural gas burning tower, and adjusts the power of the natural gas burning tower until the dual-fuel generator is in a voltage stabilization state;
after the storage battery pack is charged, the integrated control system reduces the power of the dual-fuel generator set to be equal to the power of the marine electric equipment, controls the storage battery pack to be in a discharging state and supplies power to the distribution board, and controls cabin pressure by adjusting the power of the natural gas burning tower;
and step five, after the discharging of the storage battery pack is finished, the integrated control system closes the discharging of the storage battery pack through the distribution board, and the step one to the step four are repeated.
2. The LNG carrier volatile gas recycling and energy storage method as claimed in claim 1, wherein the natural gas burning tower is an electronic ignition type natural gas burning tower or a fuel ignition type natural gas burning tower.
3. The LNG carrier volatile gas recycling and energy storage method as claimed in claim 1, wherein the operating mode of the dual-fuel generator is electronic ignition type or fuel ignition type.
4. The LNG carrier volatile gas recycling energy storage method of claim 1, wherein the natural gas using equipment comprises a dual-fuel host and a dual-fuel boiler, and the operation modes of the dual-fuel host and the dual-fuel boiler are an oil-burning mode and a gas-burning mode.
5. The LNG carrier volatile gas recycling and energy storage method as claimed in claim 1, wherein the storage battery pack is used for storing electric energy for users in a charging mode and is used for supplying power for other users through a distribution board for power supply in a discharging mode.
6. The method for recycling and storing the Liquefied Natural Gas (LNG) carrier as claimed in claim 5, wherein said other users are marine electric devices, and said marine electric devices are connected in parallel.
7. The LNG carrier boil-off gas recycling and energy storage method according to claim 1, wherein the cargo tank is a membrane type cargo tank.
8. The LNG carrier volatile gas recycling and energy storage method as claimed in claim 1, wherein the distribution board is one set or multiple sets connected in series.
9. The LNG carrier volatile gas recycling and energy storage method as claimed in claim 1, wherein the dual-fuel generator set comprises two dual-fuel generators which are arranged in parallel.
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| CN202011363400.0A CN112498649A (en) | 2020-11-27 | 2020-11-27 | Energy storage method for recycling LNG transport ship volatile gas |
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| CN202011363400.0A CN112498649A (en) | 2020-11-27 | 2020-11-27 | Energy storage method for recycling LNG transport ship volatile gas |
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