CN112739617A

CN112739617A - Fuel purification system and ship

Info

Publication number: CN112739617A
Application number: CN201980061112.9A
Authority: CN
Inventors: 大桥宏明; 松本卓也
Original assignee: Japan Post Shipping Co ltd
Current assignee: Japan Post Shipping Co ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2021-04-30
Anticipated expiration: 2039-06-18
Also published as: JP6714173B1; WO2020255255A1; JPWO2020255255A1; KR20210047909A; CN112739617B; PL437677A1; KR102400872B1

Abstract

The present invention provides a fuel purification system comprising: a plurality of tanks installed at a single ship for storing low ignition point fuel; a movement path for moving the low ignition point fuel from one of the plurality of tanks to another tank; and a filter unit provided in the moving path and configured to remove impurities contained in the low ignition point fuel flowing through the moving path.

Description

Fuel purification system and ship

Technical Field

The present invention relates to a fuel purification system mounted on a ship and a ship having the fuel purification system mounted thereon.

Background

Conventionally, the following ships are known (for example, patent document 1): a ship that transports a low ignition point fuel such as LNG as a cargo (hereinafter referred to as an "LNG ship"); a ship using a low ignition point fuel as a propulsion fuel (hereinafter, referred to as an "LNG fuel burning ship"); a ship (hereinafter, referred to as an "LNG fuel ship") that supplies LNG introduced from an onshore terminal into a tank body in a ship body to a tank body of an LNG ship or an LNG fuel burning ship.

(Prior art document)

(patent document)

Patent document 1: japanese patent laid-open publication No. 2018-188073

Disclosure of Invention

(problems to be solved by the invention)

In LNG ships, LNG fuel burning ships, and LNG fuel ships, low ignition point fuel is stored in tanks mounted on ship hulls. In the low ignition point fuel, there is a possibility that impurities are contained in accordance with, for example, geographical conditions (desert zones and the like) of a refining place of the fuel. Preferably, when the LNG carrier supplies fuel to the LNG carrier or the LNG fuel burning carrier, or when the LNG carrier carries out fuel to a terminal on land, the fuel can be supplied or carried out after removing impurities from the fuel to improve cleanliness.

An object of the present invention is to provide a fuel purification system and a ship capable of simply improving the cleanliness of low ignition point fuel stored in a tank.

(means for solving the problems)

A fuel purge system of an aspect of an embodiment of the present invention includes: a plurality of tanks installed at a single ship for storing low ignition point fuel; a movement path for moving the low ignition point fuel from one of the plurality of tanks to another tank; and a filter unit provided in the moving path and configured to remove impurities contained in the low ignition point fuel flowing through the moving path.

Also, a fuel purge system of another aspect of an embodiment of the present invention includes: a single tank mounted to a ship for storing low ignition point fuel; a circulation path for circulating the low ignition charge stored in the tank; and a filter unit provided in the circulation path and configured to remove impurities contained in the low ignition point fuel flowing through the circulation path.

(Effect of the invention)

According to the present invention, a fuel purification system and a ship are provided that can easily improve the cleanliness of low ignition point fuel stored in a tank.

Drawings

Fig. 1 is a schematic diagram illustrating the type of a ship according to the embodiment.

Fig. 2 is a schematic diagram showing a schematic configuration of the fuel purge system according to the first embodiment.

Fig. 3 is a schematic diagram showing a schematic configuration of a fuel purge system according to a second embodiment.

Detailed Description

Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals as much as possible, and redundant description is omitted for ease of understanding.

(first embodiment)

A first embodiment will be described with reference to fig. 1 and 2. First, referring to fig. 1, a description will be given of the type of a ship to which the tank body 1 of the fuel purification system of the embodiment is applied. Fig. 1 is a schematic diagram illustrating the type of a ship according to the embodiment. In addition, an example of the low ignition point fuel stored in the tank body 1 of the embodiment is LNG (Liquefied Natural Gas).

As shown in fig. 1, vessels to which the tank body 1 for storing LNG is applied include LNG ships, LNG fuel burning ships, and LNG fuel ships.

The LNG ship is a ship that transports LNG stored in the tank body 1 inside the ship body as cargo.

The LNG fuel burning ship is a ship that supplies LNG stored in a tank 1 in a ship body to an engine and uses the LNG as propulsion fuel. For example, in an LNG fuel burning ship, LNG in a liquid state in the tank 1 is sent to an engine by a pump, and is injected and burned in the engine. Alternatively, the BOG (Boil Off Gas: methane Gas naturally generated by heat input into the tank) gasified in the tank may be compressed and injected into the engine to be combusted.

The LNG-fueled ship is a ship for supplying LNG stored in the tank 1 of the ship body from an onshore terminal to the tank of the LNG ship and the LNG-fueled ship.

Further, the terms LNG ship, LNG fuel burning ship, and LNG fuel ship include ships having the same function although they are referred to by other terms. Further, the LNG carrier and the LNG-fueled carrier may use an LNG supply engine stored in the tank 1 in the hull as propulsion fuel. Further, the LNG fuel burning ship may be configured to transport LNG as cargo, in addition to using LNG as propulsion fuel.

Fig. 2 is a schematic diagram showing a schematic configuration of the fuel purge system 10 according to the first embodiment.

As shown in fig. 2, the fuel purification system 10 is installed at a single ship, and includes: a plurality of (two in the example of fig. 2)

tanks

1A, 1B for storing LNG; a movement path 2 for moving LNG from the tank 1A to the tank 1B; and a filter 6 (filter unit) provided in the moving path 2 for removing the impurities D contained in the LNG flowing through the moving path 2. Also, the fuel purification system 10 includes a second movement path 3 for returning the LNG, from which the impurities D are removed by the filter 6, to the tank 1A from the tank 1B.

Although not shown in fig. 2, each of the

tanks

1A and 1B has an introduction passage for introducing LNG from outside the hull and an export passage for exporting stored LNG to the outside. The

can bodies

1A and 1B correspond to the can body 1 shown in fig. 1.

The can body 1A and the can body 1B are inserted into both ends of the moving path 2, respectively, and the moving path 2 includes: a line 4 passing through a filter 6; and a pump 5 provided at one end of the pipeline 4 in the tank 1A, for sucking the LNG stored in the tank 1A and discharging the LNG to the tank 1B through the pipeline 4.

The second moving path 3 includes: a pipeline 7, two ends of which are respectively inserted into the tank body 1A and the tank body 1B; and a pump 8 provided at one end of the pipeline 7 in the tank 1B for sucking the LNG stored in the tank 1B and discharging the LNG to the tank 1A through the pipeline 7.

That is, in the fuel purification system 10, LNG can be circulated between the tank 1A and the tank 1B through the movement path 2 and the second movement path 3.

However, the LNG stored in the

tanks

1A and 1B may contain impurities D depending on, for example, geographical conditions (desert regions and the like) of a purification site of the LNG. The impurities D include, for example, silicon, iron, or fiber components. After LNG is introduced into the

tanks

1A and 1B, impurities D precipitate on the tank bottom surface 2a as shown in fig. 2 due to specific gravity with LNG.

In the fuel purification system 10, when LNG mixed with the foreign matter D is supplied to the tank 1A, the foreign matter D having a higher specific gravity than the LNG is precipitated in the tank 1A, but when the pump 5 is operated, the foreign matter D is sucked into the moving path 2 together with the LNG. The LNG pumped to the moving path 2 is introduced into the tank 1B after removing the impurities D while passing through the filter 6. This makes it possible to simply pass LNG through the movement path 2 to increase the cleanliness of LNG stored in the tank 1B.

In the fuel purification system 10, when the pump 8 is operated, the LNG stored in the tank 1B and from which the impurities D are removed is sucked into the second movement path 3 and returned to the tank 1A. Thus, the impurity D in the tank body 1A can be gradually reduced by using the movement path 2 and the second movement path 3 in combination. Further, the LNG in the two tanks can be purified while keeping the LNG storage amount in the tank 1A and the tank 1B constant. This makes it possible to raise the cleanliness of the LNG stored in the tank 1A and the tank 1B simply by passing the LNG through the transfer path 2 and the second transfer path 3.

Although the configuration in which the filter 6 is provided in the transfer path 2 for transferring LNG from the tank 1A to the tank 1B has been described as an example, the configuration may be such that the filter 6 is also provided in the second transfer path 3 for transferring LNG from the tank 1B to the tank 1A. At this time, for example, when the tank 1A and the tank 1B are both filled with LNG, the pump 5 and the pump 8 are simultaneously operated to simultaneously move LNG from the tank 1A to the tank 1B and LNG from the tank 1B to the tank 1A, thereby enabling the two tanks to be purged. This configuration can also be expressed as a configuration including a pair of movement paths 2 having the filter 6 in the direction from the tank 1A to the tank 1B and in the direction from the tank 1B to the tank 1A.

(second embodiment)

A second embodiment will be described with reference to fig. 3. Fig. 3 is a schematic diagram showing a schematic configuration of a fuel purge system 10A according to a second embodiment.

As shown in fig. 3, the fuel purge system 10A of the second embodiment differs from the first embodiment in the following respects: the tank body 1 is single; a circulation path 9 for circulating the LNG stored in the tank 1; the filter 6 is provided in the circulation path 9.

The can body 1 is inserted into both ends of a circulation path 9, and the circulation path 9 includes: a line 11 passing through the filter 6; and a pump 12 provided at an end of the pipeline 11 within the tank 1 for pumping the LNG stored in the tank 1 and flowing through the pipeline 11.

In the fuel purification system 10A, when LNG mixed with the foreign matter D is supplied to the tank 1, the foreign matter D having a higher specific gravity than the LNG is precipitated in the tank 1, and when the pump 12 is operated, the foreign matter D is sucked into the circulation path 9 together with the LNG. The LNG pumped to the circulation path 9 is removed of the impurities D while passing through the filter 6, and is introduced into the tank 1 again. Thus, the cleanness of the LNG stored in the single tank 1 can be improved simply by passing through the circulation path 9.

The present embodiment has been described above with reference to specific examples. However, the present invention is not limited to these specific examples. Even if those skilled in the art appropriately design and modify these specific examples, the present invention is included in the scope of the present invention as long as the characteristics of the present invention are included. The elements included in the above-described specific examples, and their arrangement, conditions, shapes, and the like are not limited to the examples, and can be appropriately modified. The combination of the elements included in each of the above specific examples may be appropriately changed as long as no technical contradiction is generated.

In the above embodiment, LNG has been described as an example of the low ignition point fuel stored in the tank body 1, but the present invention is also applicable to other low ignition point fuels, such as other Liquefied gases including LPG (Liquefied Petroleum Gas), liquid hydrogen, and ethanol fuels.

In the above embodiment, the filter is exemplified as an example of the filter unit for removing the impurity D from the LNG, but other elements having a filtering function may be used.

Description of the reference numerals

10. 10A fuel purge system

1. 1A and 1B tank body

2 path of movement

3 second moving path

6 Filter (Filter part)

9 circulation path

Claims

1. A fuel purification system, comprising:

a plurality of tanks installed at a single ship for storing low ignition point fuel;

a movement path for moving the low ignition point fuel from one of the plurality of tanks to another tank; and

and a filter unit provided in the moving path and configured to remove impurities contained in the low ignition point fuel flowing through the moving path.

2. The fuel purge system of claim 1,

the fuel purge system includes a second movement path for returning the low ignition point fuel from the other of the plurality of tanks, from which the impurities have been removed by the filter, to the one tank.

3. A fuel purification system, comprising:

a single tank mounted to a ship for storing low ignition point fuel;

a circulation path for circulating the low ignition charge stored in the tank; and

and a filter unit provided in the circulation path and configured to remove impurities contained in the low ignition point fuel flowing through the circulation path.

4. A ship equipped with the fuel purification system of any one of claims 1 to 3.