KR20230053037A - Gas Treatment System and Ship having the same - Google Patents

Abstract

The present invention relates to a gas treatment system and a ship having the same, the gas treatment system according to the present invention comprising: a high-pressure forced vaporizer which receives liquefied gas of a liquefied gas storage tank from a high-pressure pump to forcibly vaporize the same by using a heat source before heating the same to a temperature required by a high-pressure demander; a low-pressure forced vaporizer which receives the liquefied gas of the liquefied gas storage tank from a boosting pump to forcibly vaporize the same by using the heat source; a gas-liquid separator which removes heavy carbon contained in the liquefied gas which is forcibly vaporized by the low-pressure forced vaporizer; and a fuel gas heater which heats the liquefied gas, from which the heavy carbon is removed by the gas-liquid separator, to the temperature required by the low-pressure demander by using the heat source. The high-pressure forced vaporizer, the low-pressure forced vaporizer, and the fuel gas heater are individually formed in a 3-stream structure to heat or vaporize the liquefied gas. Therefore, liquefied gas may be effectively supplied.

Description

Gas treatment system and ship including the same {Gas Treatment System and Ship having the same}

The present invention relates to a gas processing system and a vessel including the same.

Recently, an LNG fuel supply method using LNG as fuel to drive an engine has been used in an LNG carrier carrying liquefied natural gas. It is also applied to other ships.

In general, LNG is known to be a clean fuel and its reserves are richer than petroleum, and its usage is rapidly increasing as mining and transportation technologies develop. It is common for LNG to store methane, the main component, in a liquid state by lowering the temperature to -162 degrees or less under 1 atm. is 0.42, which is about 1/2 of the specific gravity of crude oil.

However, the temperature and pressure required to drive the consumer may be different from the state of LNG stored in the tank. Therefore, in recent years, continuous research and development has been conducted on a technology for controlling the temperature and pressure of LNG stored in a liquid state and supplying it to a customer.

The present invention has been created to solve the problems of the prior art as described above, and an object of the present invention is to provide a gas processing system that can effectively supply liquefied gas used as fuel to high pressure and low pressure demand and a ship including the same. is to provide

A gas processing system according to an aspect of the present invention includes a high-pressure forced vaporizer for forcibly vaporizing liquefied gas in a liquefied gas storage tank supplied from a high-pressure pump and heating it to a temperature required by a high-pressure consumer; A low-pressure forced vaporizer for forcibly vaporizing the liquefied gas in the liquefied gas storage tank by using a heat source supplied from a boosting pump; a gas-liquid separator for removing heavy carbon contained in the liquefied gas forcedly vaporized from the low-pressure forced vaporizer; And a fuel gas heater for heating the liquefied gas from which heavy carbon is removed from the gas-liquid separator to a temperature required by a low-pressure consumer using a heat source, wherein each of the high-pressure forced vaporizer, the low-pressure forced vaporizer, and the fuel gas heater has 3 - Formed in a 3-stream structure, it can heat or vaporize liquefied gas.

Specifically, each of the high-pressure forced vaporizer, the low-pressure forced vaporizer, and the fuel gas heater may obtain a heat source from a first vaporized fruit unit supplying first fruit and a second vaporized fruit unit supplying second fruit.

Specifically, the first vaporization fruit unit may be a boiler or economizer generating steam, and the first fruit may be heated steam.

Specifically, the first evaporation fruit unit supplies the first fruit to each of the high-pressure forced carburetor, the low-pressure forced carburetor, and the fuel gas heater through a first fruit supply line, and in the first fruit supply line, A first branch line branching from the first fruit supply line and passing through the high-pressure forced vaporizer to heat the liquefied gas flowing through the high-pressure liquefied gas supply line in the high-pressure forced vaporizer; a second branch line branching from the first fruit supply line and passing through the low pressure forced carburetor to heat the liquefied gas flowing in the low pressure liquefied gas supply line in the low pressure forced carburetor; And a third branch line branching from the first fruit supply line and passing through the fuel gas heater may be provided so that the fuel gas heater can heat the liquefied gas flowing through the low-pressure liquefied gas supply line.

Specifically, steam, which is the first fruit cooled by heat exchange with liquefied gas in each of the first, second, and third branch lines, may be used for cooling of a cooling device.

Specifically, the second vaporization fruit unit may be an engine cooling system that cools an engine, and the second fruit may be heated engine cooling water.

Specifically, the second vaporization fruit unit supplies the second fruit to each of the high-pressure forced vaporizer, the low-pressure forced vaporizer, and the fuel gas heater through a second fruit supply line, and in the second fruit supply line, a first return line branching from the second fruit supply line and passing through the high-pressure forced carburetor to heat the liquefied gas flowing through the high-pressure liquefied gas supply line in the high-pressure forced carburetor; a second return line branching from the second fruit supply line and passing through the low-pressure forced carburetor to heat the liquefied gas flowing through the low-pressure liquefied gas supply line in the low-pressure forced carburetor; And a third return line branching from the second fruit supply line and passing through the fuel gas heater may be provided so that the fuel gas heater can heat the liquefied gas flowing through the low-pressure liquefied gas supply line.

Specifically, the second fruit supply line is configured to reuse engine cooling water, which is the second fruit cooled by heat exchange with liquefied gas in the high-pressure forced carburetor, the low-pressure forced carburetor, and the fuel gas heater, respectively, for engine cooling. Consisting of circulation lines, each of the first, second, and third return lines reuses engine cooling water, which is the second fruit cooled by heat exchange with liquefied gas in each of the first, second, and third return lines, for engine cooling. It may be branched from the second fruit supply line and connected to the second fruit supply line again after passing through each of the high-pressure forced carburetor, the low-pressure forced carburetor, and the fuel gas heater.

A vessel according to another aspect of the present invention is characterized in that it includes the gas treatment system described above.

A gas processing system according to the present invention and a ship including the same are configured to vaporize liquefied gas used as fuel in high-pressure and low-pressure sources using steam and engine cooling water, thereby supplying fuel required by high-pressure and low-pressure sources. Since it can be supplied effectively, the stability and reliability of the system can be improved.

1 is a conceptual diagram of a gas processing system according to an embodiment of the present invention.

Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In adding reference numerals to components of each drawing in this specification, it should be noted that the same components have the same numbers as much as possible, even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, in the present specification, gas may be used as a meaning encompassing all substances that are generally stored in a liquid state, such as LPG, ethylene, and ammonia, which are forcibly liquefied for storage because their boiling point is lower than room temperature, as well as LNG.

In addition, the gas may include liquefied gas, natural vaporized boil-off gas, forced vaporized boil-off gas, and excess boil-off gas.

1 is a conceptual diagram of a gas processing system according to an embodiment of the present invention.

As shown in FIG. 1, the gas processing system 1 according to an embodiment of the present invention can be mounted on a ship, and includes a liquefied gas storage tank 10, a consumer 20, a boosting pump 30, Includes a high-pressure pump 40, a high-pressure forced vaporizer 50, a low-pressure forced vaporizer 60, a gas-liquid separator 70, a fuel gas heater 80, a first vaporization fruit unit 100, and a second vaporization fruit unit 200 do.

The gas processing system 1 of the present embodiment may be provided in a ship, wherein the ship includes a gas carrier, a merchant ship carrying non-gas cargo or people, FSRU, FLNG, bunkering vessel, offshore plant, etc. inform that it is

The liquefied gas storage tank 10 may store liquefied gas. The liquefied gas storage tank 10 may be a tank such as an independent type, a membrane type, a pressurized type, and the like, and the size, shape, structure, etc. are not particularly limited as long as it can store liquefied gas.

The liquefied gas stored in the liquefied gas storage tank 10 is the fuel of the consumer 20 by heating or vaporizing means such as the high-pressure forced vaporizer 50, the low-pressure forced vaporizer 60, and the fuel gas heater 80. can be used as

The consumer 20 may be connected to the liquefied gas storage tank 10 and the liquefied gas supply lines L1 and L2, and consumes the liquefied gas supplied from the liquefied gas storage tank 10, and the high pressure consumer 21 ) and a low pressure demand site 22.

The liquefied gas supply lines (L1, L2) can be varied in various ways according to the configuration of the consumer 20. As in the present embodiment, when the consumer 20 is the high pressure consumer 21 and the low pressure consumer 22, A high-pressure liquefied gas supply line (L1) connected from the liquefied gas storage tank 10 to the high-pressure consumer 21, and a low-pressure liquefied gas supply line L6 connected from the liquefied gas storage tank 10 to the low-pressure consumer 22 ) can be branched into one liquefied gas supply line (L1, L2). At this time, the branching point of the liquefied gas supply lines (L1, L2) may be between the boosting pump 30 and the high pressure pump (40).

The high-pressure demand point 21 may be connected to the liquefied gas storage tank 10 through the high-pressure liquefied gas supply line L1, and the pressure and temperature required by the high-pressure pump 40 and the high-pressure forced vaporizer 50 are liquefied. Gas can be used as fuel to generate energy.

The high-pressure consumer 21 is a consumer that can generate energy with liquefied gas pressurized at high pressure (for example, a pressure in the range of 200 bar to 400 bar), and may refer to a device such as an engine installed for propulsion of a ship, , for example, a MEGI engine or the like.

The low pressure demand point 22 may be connected to the liquefied gas storage tank 10 through a low pressure liquefied gas supply line L2, and may be connected to the liquefied gas storage tank 10 by the boosting pump 30, the low pressure forced vaporizer 60 and the fuel gas heater 80 Energy can be generated using liquefied gas at the required pressure and temperature as fuel.

The low pressure consumer 22 is a consumer that can generate energy with liquefied gas pressurized at low pressure (for example, a pressure in the range of 10 bar to 20 bar), and may refer to a device such as an engine installed for propulsion or power generation of a ship. It may be, for example, an XDF engine, a DFDE engine, a DFDG, a boiler engine, a turbine engine, or a power generation engine.

The boosting pump 30, the configuration of the high-pressure liquefied gas supply line (L1) and the low-pressure liquefied gas supply line (L2) can be shared and connected to the boosting pump 30, the liquefied gas stored in the liquefied gas storage tank (10) It can be supplied to the high-pressure pump 40 and the low-pressure forced vaporizer 60 by primary pressurization.

The boosting pump 30 may pressurize the liquefied gas to the pressure required by the high-pressure pump 40 or the low-pressure consumer 22 .

The high-pressure pump 40 may be provided on the high-pressure liquefied gas supply line L1, and the boosting pump 30 pressurizes the liquefied gas primarily pressurized to liquefy to the pressure required by the high-pressure consumer 21. Gas can be pressurized.

The liquefied gas pressurized by the high-pressure pump 40 may be vaporized in the high-pressure forced vaporizer 50 and supplied to the high-pressure consumer 21 .

The high-pressure forced vaporizer 50 may be provided on the high-pressure liquefied gas supply line L1, forcibly vaporize the liquefied gas supplied from the high-pressure pump 40 and heat it to a temperature required by the high-pressure consumer 21. there is.

The liquefied gas stored in the liquefied gas storage tank 10 is at a cryogenic temperature of about -160 degrees in the case of LNG, and the required temperature of the liquefied gas required by the high pressure consumer 21 may be, for example, 10 to 50 degrees. , When the liquefied gas is to be delivered to the high-pressure consumer 21, the temperature of the liquefied gas is required to be raised using a vaporization means such as the high-pressure forced vaporizer 50.

Of course, the temperature of the liquefied gas may rise when pressurized by the boosting pump 30 and the high-pressure pump 40, but this is not sufficient, so the high-pressure forced vaporizer 50 heats the liquefied gas using a separate heat source. can

In this embodiment, the first fruit and the second fruit supplied from the first vaporized fruit unit 100 and the second vaporized fruit unit 200 to be described later can be used as a heat source for vaporizing liquefied gas in the high-pressure forced vaporizer 50. .

The high-pressure forced vaporizer 50 of the present embodiment includes a high-pressure liquefied gas supply line L1 through which the liquefied gas supplied from the high-pressure pump 40 flows, a first fruit supply line LV1 through which the first fruit flows, It may be formed in a 3-stream structure consisting of a second fruit supply line (LV2) through which the second fruit flows.

In the liquefied gas forcedly vaporized in the high-pressure forced vaporizer 50, methane maintains a gaseous state, and propane, butane, etc. (hereinafter referred to as heavy carbon) can maintain a liquid state. 21) is a MEGI engine operated at high pressure without the need to adjust the methane number, so it is okay if the forcibly vaporized liquefied gas contains heavy carbon.

The low-pressure forced vaporizer 60 may be provided on the low-pressure liquefied gas supply line (L2), and may be forcibly vaporized by heating the liquefied gas supplied from the boosting pump 30 using a heat source.

At this time, the heat source used in the low-pressure forced vaporizer 60 may be the first fruit and the second fruit of the first vaporized fruit unit 100 and the second vaporized fruit unit 200 as described in the above-described high-pressure forced vaporizer 50. there is.

The low-pressure forced vaporizer 60 of the present embodiment includes a low-pressure liquefied gas supply line L2 through which the liquefied gas supplied from the boosting pump 30 flows, a first fruit supply line LV1 through which the first fruit flows, It may be formed in a 3-stream structure consisting of a second fruit supply line (LV2) through which the second fruit flows.

The low-pressure forced vaporizer 60 described above can vaporize the liquefied gas and deliver it to the low-pressure consumer 22. At this time, the liquefied gas forcedly vaporized in the low-pressure forced vaporizer 60 is heavy, similar to the high-pressure forced vaporizer 50. Carbon may be present.

However, in this embodiment, since the low pressure consumer 22 needs to adjust the methane number and is a type of XDF engine driven at low pressure, the liquefied gas from which heavy carbon has been removed must be supplied to the low pressure consumer 22. Accordingly, although the liquefied gas can be heated in the low-pressure forced vaporizer 60, it may not reach the temperature required by the consumer 20 because it must go through a heavy carbon removal process. To this end, the low-pressure forced vaporizer 60 downstream A gas-liquid separator 70 and a fuel gas heater 80 may be provided on the low-pressure liquefied gas supply line L2.

The gas-liquid separator 70 may be provided on the low-pressure liquefied gas supply line L2 downstream of the low-pressure forced vaporizer 60, and may separate heavy carbon remaining in the liquid phase from the forcibly vaporized liquefied gas.

The gas-liquid separator 70 removes heavy carbon contained in the forcibly vaporized liquefied gas supplied to the low-pressure consumer 22, thereby increasing the driving efficiency of the low-pressure consumer 22.

The fuel gas heater 80 may be provided on the low-pressure liquefied gas supply line L2 on the downstream side of the gas-liquid separator 70, and the liquefied gas from which heavy carbon is removed from the gas-liquid separator 70 is supplied to the low-pressure consumer 22. can be heated to the required temperature.

At this time, the heat source used in the fuel gas heater 80 is the first vaporization fruit unit 100 and the second vaporization fruit unit 200 as described in the high pressure forced vaporizer 50 and the low pressure forced vaporizer 60. It may be a fruit and a second fruit.

The fuel gas heater 80 of the present embodiment includes a low-pressure liquefied gas supply line L2 through which liquefied gas passes through the low-pressure forced vaporizer 60 and the gas-liquid separator 70, and a first fruit through which the first fruit flows. It may be formed in a 3-stream structure consisting of a supply line (LV1) and a second fruit supply line (LV2) through which the second fruit flows.

The first vaporization fruit unit 100 may supply the first fruit as a heat source for heating liquefied gas in each of the high-pressure forced vaporizer 50, the low-pressure forced vaporizer 60, and the fuel gas heater 80.

The first vaporization heat unit 100 may be a boiler or economizer that generates steam. In this case, the first fruit may be steam heated in a boiler or an economizer.

The first vaporization fruit unit 100 may supply the first fruit (steam) to each of the high-pressure forced vaporizer 50, the low-pressure forced vaporizer 60, and the fuel gas heater 80 through the first fruit supply line LV1. there is.

In the first fruit supply line (LV1), the first fruit (steam) of the first vaporized fruit unit 100 can flow, and in this first fruit supply line (LV1), high-pressure liquefaction is performed in the high-pressure forced vaporizer (50). A first branch line (LVD1) branched from the first fruit supply line (LV1) and passing through the high-pressure forced vaporizer (50) to heat the liquefied gas flowing through the gas supply line (L1), and the low-pressure forced vaporizer (60) ), a second branch line (LVD2) branched from the first fruit supply line (LV1) and passing through the low pressure forced vaporizer (60) to heat the liquefied gas flowing through the low pressure liquefied gas supply line (L2), and fuel A third branch line (LVD3) branching from the first fruit supply line (LV1) and passing through the fuel gas heater (80) so that the gas heater (80) can heat the liquefied gas flowing through the low-pressure liquefied gas supply line (L2). ) can be provided.

In each of the first, second, and third branch lines (LVD1, LVD2, and LVD3), the first fruit (steam) at an appropriate flow rate is supplied to the high-pressure forced vaporizer 50, the low-pressure forced vaporizer 60, and the fuel gas heater 80, respectively. It goes without saying that a flow control valve may be provided to enable this.

The first fruit (steam) cooled by heat exchange with liquefied gas in each of the first, second, and third branch lines LVD1, LVD2, and LVD3 may be used for cooling of a cooling device or released to the outside air.

The second vaporization heat unit 200 may supply the second heat as a heat source for heating the liquefied gas in the high-pressure forced vaporizer 50, the low-pressure forced vaporizer 60, and the fuel gas heater 80, respectively.

The second vaporization heat unit 200 may be an engine cooling system that cools the engine. In this case, the second fruit may be jacket cooling water heated while cooling the engine in an engine cooling system or the like.

The second vaporization fruit unit 200 supplies second heat (engine cooling water) to each of the high-pressure forced carburetor 50, the low-pressure forced carburetor 60, and the fuel gas heater 80 through the second fruit supply line LV2. can

In the second fruit supply line (LV2), the second fruit (engine cooling water) of the second vaporization fruit unit 200 can flow, and in this second fruit supply line (LV2), the high pressure forced vaporizer 50 A first return line (LVS1) branched from the second fruit supply line (LV2) and passing through the high-pressure forced vaporizer (50) to heat the liquefied gas flowing through the liquefied gas supply line (L1), and a low-pressure forced vaporizer ( A second return line (LVS2) branched from the second fruit supply line (LV2) and passing through the low-pressure forced vaporizer (60) so as to heat the liquefied gas flowing in the low-pressure liquefied gas supply line (L2) in 60); A third return line branched from the second heat supply line (LV2) and passing through the fuel gas heater 80 so as to heat the liquefied gas flowing through the low-pressure liquefied gas supply line (L2) in the fuel gas heater 80 ( LVS3) may be provided.

In the first, second, and third return lines (LVS1, LVS3, and LVS3), a second fruit (engine cooling water) having an appropriate flow rate for each of the high-pressure forced carburetor 50, low-pressure forced carburetor 60, and fuel gas heater 80 is supplied. It goes without saying that a flow control valve that enables supply can be provided.

In the above, the second fruit supply line (LV2) is a flow of engine cooling water, and the engine cooled by heat exchange with liquefied gas in the high-pressure forced carburetor 50, the low-pressure forced carburetor 60, and the fuel gas heater 80, respectively. It can be configured as a circulation line so that the coolant can be reused for engine cooling.

Accordingly, in the first, second, and third return lines (LVS1, LVS3, and LVS3), the second fruit (engine cooling water) cooled by heat exchange with the liquefied gas can be reused for engine cooling, Each of the return lines (LVS1, LVS3, LVS3) is branched from the second fruit supply line (LV2), passes through the high-pressure forced vaporizer (50), the low-pressure forced vaporizer (60), and the fuel gas heater (80), respectively, and then returns to the second fruit supply line (LV2). It may be configured to be connected to the fruit supply line (LV2).

As described above, the gas processing system 1 according to the present embodiment is provided with a high pressure consumer 21 and a low pressure consumer 22 together, and the high pressure consumer 21 and the low pressure consumer 22 require each The high-pressure forced vaporizer 50, the low-pressure forced vaporizer 60, and the fuel gas heater 80 that heat or vaporize the liquefied gas to suit the temperature are also inevitably provided together, so a lot of heat energy for heating or vaporizing the liquefied gas is required. It takes

Therefore, in this embodiment, the high-pressure forced carburetor 50, the low-pressure forced carburetor 60, and the fuel gas heater 80 are each formed in a 3-stream structure, so that the high-pressure forced carburetor 50 and the low-pressure forced carburetor (60), it is possible to improve the heating or vaporization efficiency in each of the fuel gas heaters (80), and by using steam (first fruit) and engine cooling water (second fruit) as heat sources for heating or vaporizing liquefied gas. In other words, steam can be used for cooling other cooling devices and energy can be used efficiently, such as engine cooling water being reused.

In the above, the present invention has been described centering on the embodiments of the present invention, but these are only examples and do not limit the present invention, and those skilled in the art to which the present invention belongs do not deviate from the essential technical content of the present embodiment. It will be appreciated that various combinations or modifications and applications not exemplified in the embodiments are possible within the range. Therefore, technical details related to variations and applications that can be easily derived from the embodiments of the present invention should be construed as being included in the present invention.

1: gas processing system 10: liquefied gas storage tank
20: demand place 21: high pressure demand place
22: low pressure demand place 30: boosting pump
40: high pressure pump 50: high pressure forced carburetor
60: low-pressure forced vaporizer 70: gas-liquid separator
80: fuel gas heater 100: first vaporization heat unit
200: second vaporization fruit unit
L1: high-pressure liquefied gas supply line L2: low-pressure liquefied gas supply line
LV1: first fruit supply line LVD1: first branch line
LVD2: 2nd branch line LVD3: 3rd branch line
LV2: 2nd fruit supply line LVS1: 1st return line
LVS2: 2nd return line LVS31: 3rd return line

Claims (9)

A high-pressure forced vaporizer that receives the liquefied gas from the liquefied gas storage tank from a high-pressure pump, forcibly vaporizes it using a heat source, and heats it to a temperature required by the high-pressure consumer;
A low-pressure forced vaporizer for forcibly vaporizing the liquefied gas in the liquefied gas storage tank by using a heat source supplied from a boosting pump;
a gas-liquid separator for removing heavy carbon contained in the liquefied gas forcedly vaporized from the low-pressure forced vaporizer; and
A fuel gas heater for heating the liquefied gas from which heavy carbon is removed from the gas-liquid separator to a temperature required by a low-pressure customer using a heat source,
Each of the high-pressure forced carburetor, the low-pressure forced carburetor, and the fuel gas heater,
A gas treatment system formed in a 3-stream structure to heat or vaporize liquefied gas. The method of claim 1, wherein each of the high-pressure forced carburetor, the low-pressure forced carburetor, and the fuel gas heater,
A gas treatment system for obtaining a heat source from a first vaporized heat unit supplying a first fruit and a second vaporized heat unit supplying a second fruit. The method of claim 2, wherein the first vaporized fruit unit,
A boiler or economizer that generates steam,
The gas treatment system of claim 1 , wherein the first fruit is heated steam. The method of claim 3, wherein the first vaporized fruit unit,
Supplying the first fruit to each of the high-pressure forced carburetor, the low-pressure forced carburetor, and the fuel gas heater through a first fruit supply line;
In the first fruit supply line,
a first branch line branching from the first fruit supply line and passing through the high-pressure forced vaporizer to heat the liquefied gas flowing through the high-pressure liquefied gas supply line in the high-pressure forced vaporizer;
a second branch line branching from the first fruit supply line and passing through the low pressure forced carburetor to heat the liquefied gas flowing in the low pressure liquefied gas supply line in the low pressure forced carburetor; and
A gas processing system having a third branch line branched from the first fruit supply line and passing through the fuel gas heater so that the fuel gas heater can heat the liquefied gas flowing through the low-pressure liquefied gas supply line. According to claim 4,
Steam, which is the first fruit cooled by heat exchange with liquefied gas in each of the first, second, and third branch lines, is used for cooling of an air conditioner. The method of claim 2, wherein the second vaporized fruit unit,
An engine cooling system for cooling the engine,
The second fruit is heated engine cooling water. The method of claim 6, wherein the second vaporized fruit unit,
Supplying the second fruit to each of the high-pressure forced carburetor, the low-pressure forced carburetor, and the fuel gas heater through a second fruit supply line;
In the second fruit supply line,
a first return line branching from the second fruit supply line and passing through the high-pressure forced carburetor to heat the liquefied gas flowing through the high-pressure liquefied gas supply line in the high-pressure forced carburetor;
a second return line branching from the second fruit supply line and passing through the low-pressure forced carburetor to heat the liquefied gas flowing through the low-pressure liquefied gas supply line in the low-pressure forced carburetor; and
A gas treatment system comprising a third return line branched from the second fruit supply line and passing through the fuel gas heater to heat the liquefied gas flowing in the low-pressure liquefied gas supply line in the fuel gas heater. The method of claim 7, wherein the second fruit supply line,
The high-pressure forced carburetor, the low-pressure forced carburetor, and the fuel gas heater each have a circulation line so that the engine cooling water, which is the second fruit cooled by heat exchange with liquefied gas, can be reused for engine cooling,
Each of the first, second, and third return lines,
It is branched from the second fruit supply line so that the engine cooling water, which is the second fruit cooled by heat exchange with liquefied gas in each of the first, second, and third return lines, can be reused for engine cooling. A gas treatment system configured to be connected to the second fruit supply line again after passing through the low-pressure forced vaporizer and the fuel gas heater, respectively. A vessel equipped with the gas treatment system according to any one of claims 1 to 8.

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