CN112739617B

CN112739617B - Fuel purification system and ship

Info

Publication number: CN112739617B
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: 2023-04-28
Anticipated expiration: 2039-06-18
Also published as: JP6714173B1; WO2020255255A1; CN112739617A; JPWO2020255255A1; KR20210047909A; PL437677A1; KR102400872B1

Abstract

The present invention provides a fuel purification system comprising: a plurality of tanks mounted to a single vessel for storing low ignition point fuel; a moving path for moving the low ignition point fuel from one tank to another tank among the plurality of tanks; and a filter unit provided in the movement path for removing impurities contained in the low ignition point fuel flowing through the movement 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 mounted with the fuel purification system.

Background

Conventionally, there is known a ship as follows (for example, patent document 1): a ship (hereinafter, referred to as an "LNG ship") that transports low ignition point fuel such as LNG as cargo; a ship using a low ignition point fuel as a propulsion fuel (hereinafter, referred to as an "LNG fuel incinerator"); a ship (hereinafter, referred to as an "LNG fuel ship") that supplies LNG introduced from a terminal on land into a tank of a ship body to a tank of an LNG ship and an LNG fuel burning ship.

(prior art literature)

(patent literature)

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

Disclosure of Invention

(problem to be solved by the invention)

In LNG ships, LNG fuel incinerators, and LNG fuel ships, low ignition point fuel is stored in a tank mounted to a hull. In the low ignition point fuel, impurities may be contained in accordance with geographical conditions (desert regions, etc.) of a fuel refining site, for example. When the LNG fuel vessel supplies fuel to the LNG vessel or the LNG fuel incinerator vessel or when the LNG vessel carries fuel from the terminal on land, it is preferable that the fuel be supplied or carried out after impurities are removed from the fuel to improve cleanliness.

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

(means for solving the problems)

The fuel purification system of one aspect of the embodiment of the present invention includes: a plurality of tanks mounted to a single vessel for storing low ignition point fuel; a moving path for moving the low ignition point fuel from one tank to another tank among the plurality of tanks; and a filter unit provided in the movement path for removing impurities contained in the low ignition point fuel flowing through the movement path.

Likewise, a fuel purification system of another aspect of an embodiment of the present invention includes: a single tank mounted to the vessel for storing the low ignition point fuel; a circulation path for circulating the low-ignition-temperature fuel stored in the tank; and a filter unit provided in the circulation path for removing impurities contained in the low ignition point fuel flowing through the circulation path.

(effects of the invention)

According to the present invention, a fuel purge 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 a type of a ship according to an embodiment.

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

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

Detailed Description

Hereinafter, embodiments will be described with reference to the drawings. For ease of explanation, identical components are given identical reference numerals as much as possible in the drawings, and duplicate explanation is omitted.

(first embodiment)

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

As shown in fig. 1, the vessels to which the tank 1 for storing LNG is applied include LNG vessels, LNG-fueled combustion vessels, and LNG-fueled vessels.

An LNG ship is a ship that transfers LNG stored in a tank 1 in a 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 a propulsion fuel. For example, in an LNG fuel incinerator, LNG in a liquid state in a tank 1 is sent to an engine by a pump, and is injected and burned by the engine. The BOG (Boil Off Gas) gasified in the tank may be compressed, injected into the engine, and burned.

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

In addition, the respective designations of LNG ship, LNG-fuel incinerator ship and LNG-fuel ship include ships having the same functions, although they are otherwise designated. The LNG ship and the LNG-fueled ship may use the LNG stored in the tank 1 in the ship body as a propulsion fuel. The LNG fuel burning ship may be configured to transport LNG as cargo in addition to using LNG as a propellant.

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

As shown in fig. 2, the fuel purification system 10 is mounted to a single vessel, which 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; a filter 6 (filtering unit) provided in the movement path 2 for removing the impurity D contained in the LNG flowing through the movement path 2. Further, the fuel purge system 10 includes a second moving path 3 for returning the LNG from which the impurity D is removed by the filter 6 from the tank 1B to the tank 1A.

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 outside. The

tanks

1A and 1B correspond to the tank 1 shown in fig. 1.

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

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

That is, in the fuel purge 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 the impurity D according to, for example, the geographical conditions (desert area, etc.) of the LNG purification site. Impurity D includes, for example, silicon, iron, or a fibrous component. After LNG is introduced into the

tanks

1A and 1B, the impurity D is precipitated on the tank bottom surface 2a due to the specific gravity of LNG as shown in fig. 2.

In the fuel purification system 10, when LNG mixed with the impurity D is supplied to the tank 1A, the impurity D having a larger specific gravity than that of LNG is precipitated in the tank 1A, but when the pump 5 is operated, the impurity D is sucked into the movement path 2 together with the LNG. The LNG sucked into the movement path 2 is removed of the impurity D while passing through the filter 6, and is introduced into the tank 1B. This can enhance the cleanliness of the LNG stored in the tank 1B simply by passing the LNG through the movement path 2.

In the fuel purge system 10, when the pump 8 is operated, LNG stored in the tank 1B and from which the impurity D has been removed is sucked into the second movement path 3 and returned to the tank 1A. Thus, by combining the movement path 2 and the second movement path 3, the impurity D in the can 1A can be gradually reduced. Further, LNG can be purified from both tanks while keeping the LNG storage amounts of the tank 1A and the tank 1B constant. This can raise the cleanliness of LNG stored in the

tanks

1A and 1B simply by passing LNG through the movement paths 2 and 3.

Although the configuration in which the filter 6 is provided in the movement path 2 for moving LNG from the tank 1A to the tank 1B has been described as an example, the configuration in which the filter 6 is provided in the second movement path 3 for moving LNG from the tank 1B to the tank 1A may be also provided. At this time, for example, when both the tank 1A and the tank 1B are full of LNG, the pump 5 and the pump 8 are operated simultaneously, and the LNG is moved from the tank 1A to the tank 1B and the LNG is moved from the tank 1B to the tank 1A, whereby the two tanks can be purged. This configuration may be expressed as a configuration including a pair of movement paths 2 having the filter 6 from the tank 1A to the tank 1B and 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 general configuration of a fuel purification system 10A according to a second embodiment.

As shown in fig. 3, the fuel purification system 10A of the second embodiment differs from the first embodiment in the following points: 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.

Both ends of the circulation path 9 are inserted into the tank 1, and the circulation path 9 has: a line 11 passing through the filter 6; a pump 12 provided at one end of the pipeline 11 located in the tank 1, for sucking the LNG stored in the tank 1 and flowing the LNG through the pipeline 11.

In the fuel purification system 10A, when LNG mixed with the impurity D is supplied to the tank 1, the impurity D having a larger specific gravity than that of the LNG is precipitated in the tank 1, and when the pump 12 is operated, the impurity D is sucked into the circulation path 9 together with the LNG. The LNG sucked to the circulation path 9 is removed of the impurity D while passing through the filter 6, and is again introduced into the tank 1. This can simply improve the cleanliness of LNG stored in the single tank 1 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 changes these specific examples, the present invention is included in the scope of the present invention as long as the features of the present invention are included. The elements included in the specific examples described above and their arrangement, conditions, shapes, and the like are not limited to examples, and may be appropriately modified. As long as no technical contradiction occurs, the combination of the elements included in the above specific examples may be appropriately changed.

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

In the above embodiment, the filter has been described 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 purification system

1. 1A, 1B tank body

2. Travel path

3. Second movement path

6. Filter (Filter part)

9. Circulation path

Claims

1. A fuel purification system, comprising:

a plurality of tanks mounted to a single vessel for storing low ignition point fuel;

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

a filter unit provided in the first movement path for removing impurities contained in the low ignition point fuel flowing through the first movement path;

a second moving path for returning the low ignition point fuel from the other one of the plurality of tanks, from which the impurity has been removed by the filtering unit, to the one tank;

a first pump provided in the first moving path for sucking the low ignition point fuel stored in the one of the tanks and guiding the low ignition point fuel to the other of the tanks, and

and a second pump provided in the second movement path for sucking the low ignition point fuel stored in the other one of the plurality of tanks and guiding the low ignition point fuel to the one of the plurality of tanks.

2. A ship fitted with the fuel purification system of claim 1.