KR101848140B1 - Gas Treatment System and Vessel having same - Google Patents

Abstract

According to an embodiment of the present invention, a gas processing system includes a first line connecting a liquefied gas storage tank and a first customer; An evaporative gas compressor provided on the first line and compressing the evaporated gas generated in the liquefied gas storage tank and having a plurality of compression stages; A second line branched downstream of the evaporative gas compressor on the first line to connect a second customer; And a controller for controlling at least a part of the plurality of compression stages of the evaporative gas compressor to make the evaporation gas uncompressed depending on whether the second consumer is operating or not.

Description

TECHNICAL FIELD [0001] The present invention relates to a gas treatment system and a vessel including the same,

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

Liquefied natural gas (Liquefied natural gas), Liquefied petroleum gas (Liquefied petroleum gas) and other liquefied gas are widely used in place of gasoline or diesel in recent technology development.

Liquefied natural gas is a liquefied natural gas obtained by refining natural gas collected from a gas field. It is a colorless and transparent liquid with almost no pollutants and high calorific value. It is an excellent fuel. On the other hand, liquefied petroleum gas is a liquid fuel made by compressing gas containing propane (C3H8) and butane (C4H10), which come from oil in oil field, at room temperature. Liquefied petroleum gas, like liquefied natural gas, is colorless and odorless and is widely used as fuel for household, business, industrial, and automotive use.

Such liquefied gas is stored in a liquefied gas storage tank installed on the ground or stored in a liquefied gas storage tank provided in a ship which is a means of transporting the ocean. The liquefied natural gas is liquefied to a volume of 1/600 The liquefaction of liquefied petroleum gas has the advantage of reducing the volume of propane to 1/260 and the content of butane to 1/230, resulting in high storage efficiency. The temperature and pressure necessary for driving the engine using such liquefied gas as fuel may be different from the state of the liquefied gas stored in the tank.

In addition, when LNG is stored in a liquid state, some LNG is vaporized and boil off gas (BOG) is generated as heat penetration occurs in the tank. Such evaporation gas may cause problems in a liquefied gas processing system. In order to solve the problem by discharging the evaporation gas to the outside (in the past, the evaporation gas was simply discharged to the outside in order to lower the tank pressure by lowering the tank pressure), the problem was solved. However, .

 In recent years, as a technique for efficiently processing evaporative gas, utilization methods such as re-liquefying the generated evaporative gas and supplying it to the engine have been carried out. However, since sufficient evaporative gas is not consumed even in such a utilization, efficient utilization .

 Ship owners have been using the LNG-fueled MEGI engine to propel ships and have been able to cope effectively with the recent NOx emission regulations and environmental pollution prevention. However, the MEGI engine has a problem that the power consumption is large, the installation cost is considerably high, the system configuration is complicated, and the installation area is required because the engine driving demand pressure is as high as 300 bar.

Therefore, a low-speed two-stroke low-pressure injection engine (2sDF or XDF) has been developed and a fuel supply system using a low-speed two-stroke low-pressure injection engine has been developed.

The present invention has been made to improve the prior art, and an object of the present invention is to provide a gas processing system and a ship including the same, which effectively supply liquefied gas and / or evaporated gas from a liquefied gas storage tank to a customer .

A gas treatment system according to the present invention comprises: a first line connecting a liquefied gas storage tank and a first customer; An evaporative gas compressor provided on the first line and compressing the evaporated gas generated in the liquefied gas storage tank and having a plurality of compression stages; A second line branched downstream of the evaporative gas compressor on the first line to connect a second customer; And a controller for controlling at least a part of the plurality of compression stages of the evaporative gas compressor to make the evaporation gas uncompressed depending on whether the second consumer is operating or not.

Specifically, the control unit controls the evaporation gas to be uncompressed only by the last compression stage among the plurality of compression stages of the evaporation gas compressor in accordance with the supply pressure of the second demanding customer, It is possible to supply the evaporated gas compressed in the evaporative gas compressor to the second consumer through the second line.

Specifically, when only the second demander operates, the first demander may be stopped when the ship is stationed in the port.

Specifically, the first demander may be a low-speed two-stroke low-pressure gas injection engine, and the second demander may be a heterogeneous fuel-generating engine.

Specifically, the evaporative gas compressor may be a centrifugal multi-stage compressor.

Further, the vessel according to the embodiment of the present invention may include the gas treatment system.

The gas treatment system and the vessel including the gas treatment system according to the present invention can effectively supply the liquefied gas and / or the evaporated gas from the liquefied gas storage tank to the customer, thereby enhancing system stability and reliability.

1 is a conceptual diagram of a liquefied gas processing system according to a first embodiment of the present invention.
2 is a conceptual diagram of a liquefied gas processing system according to a second embodiment of the present invention.
3 is a conceptual diagram of a liquefied gas processing system according to a third embodiment of the present invention.
4 is a conceptual diagram of a liquefied gas processing system according to a fourth embodiment of the present invention.
5 is a conceptual diagram of a liquefied gas processing system according to a fifth embodiment of the present invention.
6 is a conceptual diagram of a liquefied gas processing system according to a sixth embodiment of the present invention.
7 is a conceptual diagram of a liquefied gas processing system according to a seventh embodiment of the present invention.
8 is a conceptual diagram of a liquefied gas processing system according to an eighth embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, the liquefied gas may be LPG, LNG, or ethane, and may be, for example, LNG (Liquefied Natural Gas), and the evaporation gas may refer to BOG (Boil Off Gas) such as natural vaporized LNG.

The liquefied gas can be referred to irrespective of the state change, such as liquid state, gas state, mixed state of liquid and gas, supercooled state, supercritical state, and the like. Further, it is apparent that the present invention is not limited to the liquefied gas to be treated, but may be a liquefied gas processing system and / or an evaporative gas processing system, and the systems of the following drawings may be applied to each other.

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

FIG. 1 is a conceptual view of a liquefied gas processing system according to a first embodiment of the present invention, FIG. 2 is a conceptual view of a liquefied gas processing system according to a second embodiment of the present invention, and FIG. 4 is a conceptual view of a liquefied gas processing system according to a fourth embodiment of the present invention, Fig. 5 is a conceptual view of a liquefied gas processing system according to a fifth embodiment of the present invention, Fig. 6 is a schematic view of a liquefied gas processing system 6 is a conceptual diagram of a liquefied gas processing system according to a sixth embodiment of the present invention.

1 to 8, a gas processing system 1 according to an embodiment of the present invention includes a liquefied gas storage tank 10, a gas-liquid separator 11, a propulsion engine 21, a power generation engine 22, The gas heater 23, the boosting pump 30, the forced vaporizer 41, the gas-liquid separator 42, the first heater 43, the evaporative gas compressor 50, the H / D compressor 51 and the LNG vaporizer 60).

Hereinafter, each configuration of the gas processing system 1 according to one embodiment of the present invention will be described, and each embodiment through the relationship between the configurations of the system after the description of the configuration is completed will be described. In addition, the configurations shown in Figs. 1 to 8, which are not described in the following description, will be described in the description of each embodiment.

The liquefied gas storage tank 10 is connected to the propulsion engine 21 through the first line L1 and is connected to the propulsion engine 21, the power generation engine 22, the liquefied gas to be supplied to the gas combustion apparatus 23, Store evaporative gas.

The liquefied gas storage tank 10 must store the liquefied gas in a liquid state, at which time the liquefied gas storage tank 10 may take the form of a pressure tank. Here, the liquefied gas storage tank 10 is not limited to various types.

The gas-liquid separator 11 is provided on the first line L 1 and is capable of separating the phase of the evaporated gas supplied from the liquefied gas storage tank 10.

More specifically, the gas-liquid separator 11 is provided between the evaporation gas compressor 50 and the liquefied gas storage tank 10 on the first line L1, Can be separated into a liquid phase and a vapor phase. The gas phase separated by the gas-liquid separator 11 is supplied to the evaporative gas compressor 50, and the liquid phase can be returned to the liquefied gas storage tank 10.

The evaporative gas supplied by the evaporative gas compressor 50 from the liquefied gas storage tank 10 is a phase of the evaporative gas at a temperature of about -150 degrees and a pressure of about 1 bar to 2 bar (preferably 1.03 bar) It may not be an all-vaporized phase. Therefore, the gas-liquid separator 11 can supply only the gas-phase evaporation gas to the evaporation gas compressor 50, thereby improving the driving efficiency of the evaporation gas compressor 50, and supplying the liquid-phase evaporation gas to the liquefied gas storage tank 10 So that waste of the evaporation gas can be prevented.

The consumers 21, 22, and 23 may consume the liquefied gas supplied from the liquefied gas storage tank 10, and the present invention is not limited to this, and the evaporation gas (for example, flash gas or the like) Forcibly generated evaporation gas) or naturally occurring evaporation gas (e.g., naturally occurring evaporation gas) in the liquefied gas storage tank 10 can also be consumed.

The consumers 21, 22, and 23 may include a propulsion engine 21, a power generation engine 22, and a gas combustion device 23. However, this is merely an example for explaining the gas treatment system 1 according to the embodiment of the present invention, but it is not limited thereto.

The propulsion engine 21 supplies thrust to a ship (not shown) using the liquefied gas or the evaporation gas stored in the liquefied gas storage tank 10 as fuel.

As the piston (not shown) inside the cylinder (not shown) reciprocates by the combustion of the liquefied gas, the evaporation gas, or the oil, the propulsion engine 21 is driven by a crankshaft (not shown) connected to the piston And a shaft (not shown) connected to the crankshaft can be rotated. Accordingly, the propulsion engine 21 can move forward or backward with the floating structure as the propeller (not shown) connected to the shaft rotates during driving.

The propulsion engine 21 in the embodiment of the present invention may be a low-speed two-stroke low-pressure gas injection engine, a 2s DF engine (XDF engine) developed by Wirth Sila, Otto cycle.

That is, the propulsion engine 21 compresses the air-fuel mixture supplied to the cylinder up to the top dead center, and at the instant when ignition is performed by the pilot fuel from outside at the compression top dead center, So that explosive power is generated. At this time, the air-fuel mixture mass ratio may be in the form of a Lean burn engine which may be in a lean state less than 14.7: 1.

In this case, HFO (Heavy Fuel Oil) or MDO (Marine Diesel Oil) is used as the ignition fuel, and the ratio of the ignition fuel to the high-pressure gas is about 1:99.

The propulsion engine 21 may be supplied with liquefied gas of 8 to 20 bar (preferably 10 bar) to generate power, and the state of the liquefied gas to be supplied may vary depending on the state required by the propulsion engine 21 .

Generally, a large-sized ship generates thrust through a MEGI engine. However, in the embodiment of the present invention, many advantages are generated by using a low-speed two-stroke low-pressure gas injection engine as an engine for generating thrust of a ship.

The MEGI engine requires a high pressure of about 200 bar to about 300 bar, which is necessary for driving the supply fuel, and requires a considerable amount of electric power to be consumed, which is about 210KW to about 220KW (about 215KW) for driving.

On the other hand, the low-speed two-stroke low-pressure gas injection engine has a consumption power for driving the supply fuel at a low pressure of 8 to 20 bar (preferably 10 to 17 bar) required for driving is about 13 KW to 17 KW It is possible to reduce much power compared with the MEGI engine.

Further, the MEGI engine has a problem that the gas supply system (not shown) accompanying the MEGI engine is very complicated and takes up a lot of space in order to generate the pressure required by the MEGI engine because the driving pressure is extremely high. On the other hand, the low-speed two-stroke low-pressure gas injection engine is advantageous in that the fuel supply system is very simple and the space occupied by the low-pressure gas injection engine is low because the driving pressure is low.

The power generation engine 22 may be an engine for generating power or other power. The power generation engine 22 may be a DFDE, for example, as a heterogeneous fuel engine, and may be selectively supplied with liquefied gas or fuel oil (oil) without being supplied with a mixture of liquefied gas and fuel oil. This is to prevent the mixture of two materials having different combustion temperatures from being mixed, thereby preventing the efficiency of the engine from deteriorating.

The gas combustion unit (23) is a device for burning the evaporation gas to consume excess evaporation gas.

The gas combustion device 23 is configured to process the evaporated gas generated in the liquefied gas storage tank 10 or to process the evaporated gas supplied to the propulsion engine 21 or the power generation engine 22 in an excessively large amount .

The boosting pump 30 is provided on the second line L2 and is disposed inside or outside the liquefied gas storage tank 10 to store the liquefied gas stored in the liquefied gas storage tank 10 into the forced vaporizer 41 Can supply. At this time, the boosting pump 30 may be in the form of a locking type when disposed inside.

The boosting pump 30 is capable of depressurizing the liquefied gas stored in the liquefied gas storage tank 10 and pressurizing the liquefied gas to a pressure required by the propulsion engine 21 within a few to several tens of bar .

Specifically, the boosting pump 30 can pressurize the liquefied gas stored in the liquefied gas storage tank 10 to approximately 8 to 25 bar (preferably 10 to 17 bar) A low-pressure gas injection engine (for example, an X-DF engine) may correspond to an appropriate pressure of fuel to be supplied. Where the booster pump 30 can be pressurized to a pressure of approximately 8 to 25 bar at a time.

In addition, the booster pump 30 can be operated in response to the discharge pressure of the evaporative gas compressor 50. The boosting pump 30 supplies the liquefied gas stored in the liquefied gas storage tank 10 to the downstream side of the evaporative gas compressor 50 so that the liquefied gas can be pressurized corresponding to the pressure discharged from the evaporative gas compressor 50 have.

Since the liquefied gas stored in the liquefied gas storage tank 10 is in a liquid state, the boosting pump 30 can pressurize the liquefied gas discharged from the liquefied gas storage tank 10 to slightly raise the pressure and temperature, The liquefied gas pressurized by the pump 30 may still be in a liquid state.

The forced vaporizer 41 supplies the pressurized liquefied gas from the boosting pump 30 and forcibly vaporizes it. Specifically, the forced vaporizer 41 is provided on the second line L2, and can supply the pressurized liquefied gas from the boosting pump 30 to the gas-liquid separator 42 after forcibly vaporizing it.

The forced vaporizer 41 is capable of vaporizing the liquefied gas and can supply the liquefied gas vaporized by the gas-liquid separator 42 while maintaining the pressure pressurized by the boosting pump 30. [

The gas-liquid separator 42 is provided on the second line L2 and is capable of separating a phase of the liquefied gas supplied from the forced vaporizer 41.

Liquid separator 42 is disposed between the forced vaporizer 41 and the first heater 43 on the second line L2 to separate an image of the liquefied gas supplied from the forced vaporizer 41, Only the vaporized gas in the vapor phase can be supplied to the propulsion engine 21. [

The gas-liquid separator 42 can supply only the gaseous vaporized gas to the first heater 43 through the second line L2 and return the vaporized liquid vaporous gas to the liquefied gas storage tank 10 .

Thus, in the embodiment of the present invention, waste of evaporated gas can be prevented, and efficient use of evaporated gas can be enabled.

The first heater 43 is provided between the propulsion engine 21 and the gas-liquid separator 42 on the second line L2 and is capable of heating the forcedly vaporized liquefied gas supplied from the gas-liquid separator 42 .

The first heater 43 can heat the forced vaporized liquefied gas supplied from the gas-liquid separator 42 to a temperature required by the propulsion engine 21 and can heat up to a temperature of approximately 40 to 50 degrees. Here, the first heater 43 may be a Low Duty (L / D, low capacity) heater.

The evaporative gas compressor (50) is provided on the first line (L1), compresses the evaporated gas generated in the liquefied gas storage tank (10) and supplies it to the propulsion engine (21). At this time, the evaporative gas compressor 50 can compress the evaporative gas from 8 bar to 20 bar (preferably 10 bar to 17 bar).

The evaporation gas supplied to the evaporative gas compressor 50 is changed from a temperature of about 150 to a pressure of 1.03 bar at a temperature of about 45 degrees to a pressure of from 8 to 20 bar (preferably from 10 to 17 bar) Can be supplied.

The evaporative gas compressor (50) may be composed of five stages to seven stages, and preferably six stages. Specifically, the evaporative gas compressor (50) may be configured as a centrifugal type and may include first to sixth stages, and an evaporative gas cooler (not shown) may be further provided at the downstream end of the compressor.

If the number of compressors of the evaporation gas compressor 50 is less than 5, the pressure range of the introduced gas is narrow and the efficiency of driving the propulsion engine 21 becomes inefficient. If the number of stages is more than 7, unnecessary compression is performed Oversizing will occur.

Therefore, in the embodiment of the present invention, the number of compressors constituting the evaporative gas compressor (50) is limited to five to seven stages, thereby achieving an optimum number of compression stages required for driving the propulsion engine (21).

Thereby, efficient compression is enabled to drive the propulsion engine 21, and the power consumption of the evaporative gas compressor 50 can be optimized.

In addition, the evaporative gas compressor (50) is designed to have a capacity capable of treating all naturally occurring evaporative gases generated in the liquefied gas storage tank (10) at the maximum processing capacity. Herein, the state of fullness refers to the state at the time of laden voyage in which the liquefied gas is filled in the liquefied gas storage tank 10 provided in the vessel.

This allows the evaporative gas compressor 50 to be designed to have a maximum throughput capacity that is less than the maximum throughput capacity of conventional evaporative gas compressors, allowing the use of compressors of a smaller size than conventional, And it is possible to maximize the space occupancy in the ship.

A detailed description of the maximum processing capacity limitation of the evaporative gas compressor (50) will be described in detail later in the description of each embodiment.

In the case where the liquefied gas is loaded into the liquefied gas storage tank 10 or the liquefied gas stored in the liquefied gas storage tank 10 is unloaded to the outside, the high-duty (H / D) The compressor may be used for compressing the evaporation gas generated in the compressor 10 to the outside or incinerating the evaporation gas.

Hereinafter, a process of loading the liquefied gas into the liquefied gas storage tank 10 or unloading the liquefied gas stored in the liquefied gas storage tank 10 will be described.

The gas processing system 1 according to the embodiment of the present invention includes an H / D compressor 51, an H / D compressor 51, and an H / D compressor 51 for pressurizing evaporative gas generated in the liquefied gas storage tank 10 upon loading or unloading, A second heater 511 for heating the evaporated gas compressed by the liquefied gas storage tank 10 and a shore (not shown) for storing the liquefied gas to be supplied to the liquefied gas storage tank 10 during bunkering.

When the liquefied gas is first loaded from the outside into the liquefied gas storage tank 10, that is, when bunkering, the liquefied gas is an ignitable material, so that a special operation different from a general storage tank, .

Generally, the replacement method of the liquefied gas storage tank 10 is to supply the dry gas to the inside of the liquefied gas storage tank 10 to remove moisture, and to remove the inert gas from the liquefied gas storage tank 10 To remove oxygen. Thereafter, a gaseous-up step of removing inert gas by supplying a hydrocarbon gas formed by vaporizing the liquefied gas using the LNG vaporizer 60 to be described later into the liquefied gas storage tank 10 is performed, A cool-down process for cooling the liquefied gas storage tank 10 using gas is performed. When the gashing and cooldown processes are completed, the replacing method is completed and then the liquefied gas such as LNG is supplied to the inside of the liquefied gas storage tank 10 to perform the shipment work.

On the contrary, when the liquefied gas stored in the liquefied gas storage tank 10 is unloaded to the shore, the operation slightly differs from that described above.

First, the liquefied gas stored in the liquefied gas storage tank 10 is discharged to the shore. At this time, the remaining liquefied gas is present, and it is subjected to a warming-up step to remove all remaining liquefied gas. In the warming up step, the evaporated gas generated in the liquefied gas storage tank 10 is compressed by the H / D compressor 51 and then heated by the second heater 511 to increase the internal temperature of the liquefied gas storage tank 10, Allow all gas to vaporize. After the warm-up step, an inert gas is supplied to remove all of the evaporation gas remaining in the liquefied gas storage tank 10, and then oxygen is supplied to supply air therein. Through the above process, the unloading process of the liquefied gas storage tank 10 is completed.

During the liquefied gas loading process (bunkering), even when the liquefied gas storage tank 10 cools down, many evaporative gases are generated at the time of loading the liquefied gas. At this time, the internal pressure of the liquefied gas storage tank 10 rises There is a possibility that the H / D compressor 51 is used to discharge the generated evaporated gas to an external customer (shore).

Also, during the liquefied gas unloading process, the H / D compressor 51 is used in the process of compressing the evaporation gas to raise the internal temperature of the liquefied gas storage tank 10 in the warming up step.

The H / D compressor 51 can realize both the compression process used during the liquefied gas loading process and the compression process used during the liquefied gas unloading process.

That is, the H / D compressor 51 pressurizes the evaporation gas generated during the bunkering to supply it to the shore consumer, or evaporates the evaporation gas remaining in the liquefied gas storage tank 10 in the warm- Gas may be pressurized and returned to the liquefied gas storage tank 10 so that the evaporated gas circulates to the liquefied gas storage tank 10.

Specifically, the H / D compressor 51 can supply the evaporative gas generated from the liquefied gas storage tank 10 through the fourth line L4 to the shore after bunkering, When the liquefied gas is unloaded, the evaporation gas remaining in the liquefied gas storage tank 10 is compressed and heated by the second heater 511 and returned to the liquefied gas storage tank 10 so that the evaporated gas is supplied to the liquefied gas storage tank 10, the H / D compressor 51, the second heater 511, and the liquefied gas storage tank 10 in that order. Thus, all of the liquefied gas stored in the liquefied gas storage tank 10 can be vaporized, and all of the vaporized liquefied gas can be discharged outside the liquefied gas storage tank 10.

The LNG vaporizer 60 is used for the first loading of the liquefied gas from the external shore to the liquefied gas storage tank 10, that is, during the replacement operation preceding the bunkering, Lt; / RTI >

Specifically, the LNG vaporizer 60 can supply a liquefied gas from a shore on the shore and heat and vaporize the liquefied gas. By supplying the vaporized liquefied gas to the liquefied gas storage tank 10, All the inert gas filled in the tank 10 can be replaced with the vaporized liquefied gas. Through this, the go-up step is performed, and the cool-down process to be performed after that is smoothly proceeded.

Hereinafter, various embodiments of the gas treatment system 1 of the present invention, which can be derived based on the configurations of the gas treatment systems 1 of the present invention described above, will be described.

The gas processing system 1 according to the embodiment of the present invention is a system in which the evaporation gas compressor 50 is capable of operating in a liquefied gas storage tank 10 with a capacity capable of treating all the naturally occurring evaporation gases generated in a full- To improve the system stability and reliability by economically and effectively supplying the liquefied gas and / or the evaporated gas from the liquefied gas storage tank 10 to the propulsion engine 21.

1, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, a liquefied gas storage tank 10 A forced vaporizer 41 for supplying a pressurized liquefied gas from the boosting pump 30 and forcibly vaporizing the pressurized liquefied gas; a liquefied gas storage tank 10 and a propelling engine 21; A first line L1 having an evaporative gas compressor 50, a liquefied gas storage tank 10 and an evaporation gas compressor 50 downstream on the first line L1, And a second line (L2) having a forced vaporizer (41).

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the first line L1, And an evaporative gas compressor (50). The gas processing system 1 according to the embodiment of the present invention also connects the liquefied gas storage tank 10 through the second line L2 and the downstream of the evaporative gas compressor 50 on the first line L1 The booster pump 30, the forced vaporizer 41 and the first heater 43 are provided on the second line L2 to replenish the fuel supplied to the propulsion engine 21 through the first line L1 .

Here, the evaporative gas compressor (50) can be designed to have a capacity capable of treating all naturally occurring evaporative gases generated in the liquefied gas storage tank (10) at the maximum processing capacity.

Conventionally, an evaporative gas compressor that processes evaporative gas generated from a liquefied gas storage tank and supplies the evaporative gas to a propulsion engine has a maximum capacity capable of treating all evaporative gas required by a propulsion engine when the ship has a maximum linear velocity .

As a result, the evaporative gas compressor must be capable of receiving and processing not only the evaporation gas generated naturally in the liquefied gas storage tank, but also the forcibly generated evaporation gas, which is a vaporized liquefied gas stored in the liquefied gas storage tank, The processing capacity needs to be set very large.

Therefore, the evaporation gas compressor has a problem that the maximum processing capacity is set to be very large and the cost of constructing the evaporative gas compressor is excessively high. In addition, the evaporative gas compressor having a maximum processing capacity is very large in size and requires a large space for installation, which makes the usable space of the vessel narrow, which is disadvantageous in terms of space securing.

In order to solve this problem, in the embodiment of the present invention, the evaporative gas compressor 50 has a capacity for treating all the naturally occurring evaporative gases generated in the liquefied gas storage tank 10, as described above, Respectively. Herein, the state of fullness refers to a state at the time of laden voyage in which the liquefied gas is filled in the liquefied gas storage tank 10 provided in the vessel and is sailed.

Thereby, the evaporative gas compressor (50) can use an evaporative gas compressor designed to have a maximum processing capacity of less than the maximum processing capacity of a conventional evaporative gas compressor, thereby reducing the cost of constructing the system, It is possible to maximize the space.

As described above, when the evaporative gas compressor 50 is designed to have the maximum capacity to handle all the naturally occurring evaporative gases generated in the liquefied gas storage tank 10, Only the evaporated gas discharged from the evaporative gas compressor 50 is insufficient to discharge the linear velocity.

Therefore, in the present invention, the propulsion engine 21 is supplied with the forcible evaporation gas forcedly vaporized by the forced vaporizer 41 to the downstream end of the evaporation gas compressor 50 in order to compensate for the shortage, And the fuel is supplied so as to sufficiently supply fuel for the maximum linear velocity.

Therefore, in the embodiment of the present invention, the maximum capacity limitation of the evaporative gas compressor 50 is substantially realized by solving the problem that is reflected in the benefit of the maximum capacity limitation of the evaporative gas compressor 50.

In addition, since the energy used in the evaporative gas compressor 50 is reduced in the ship having the gas processing system 1 according to the embodiment of the present invention described above, the energy consumption in the ballast voyage is reduced, There is an effect that a greater amount of energy can be used for the propulsion of the engine.

In the embodiment of the present invention, the liquefaction device 530 for re-liquefying the evaporated gas compressed in the evaporative gas compressor 50 may be provided (see Fig. 3). At this time, the liquefaction device 530 It is a remelting device using a separate refrigerant.

In the embodiment of the present invention, since the propulsion engine 21 requires 15 to 20 bar of fuel pressure, it can not be compressed to 100 to 150 bar or 200 to 400 bar, which is a high liquefaction efficiency in the evaporative gas compressor 50, Even if heat exchange with at least a part of the evaporation gas generated in the gas storage tank 10 and the evaporation gas compressed in the evaporation gas compressor 50 can not be effectively re-liquefied.

Accordingly, in an embodiment of the present invention, a remelting device 530 having a separate refrigerant may be provided for efficiently processing the evaporation gas.

Here, the evaporated gas re-liquefied by the re-liquefier 530 is supplied to the gas-liquid separator 531 and can be separated into a gas phase and a liquid phase. The vapor phase is again supplied upstream of the evaporative gas compressor 50 on the first line L1 to be merged with the evaporated gas generated in the liquefied gas storage tank 10 and the liquid phase can be returned to the liquefied gas storage tank 10 have.

The redistribution device 530 is also connected to the seventeenth line L17 which is branched downstream of the evaporative gas compressor 50 on the first line L1 and connected upstream of the evaporative gas compressor 50 on the first line L1 And a gas-liquid separator 531 is also provided on the seventeenth line L17 to supply the gas phase upstream of the evaporative gas compressor 50 on the first line L1 through the seventeenth line L17 . As the refrigerant used in the remelting device 530, nitrogen (N2), mixed refrigerant or the like may be used.

The gas processing system 1 according to the embodiment of the present invention includes a technique capable of reducing the load on the first heater 43 by having the first heater 43 on the second line L2 can do.

1, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, a liquefied gas storage tank 10, A forced vaporizer 41 for supplying a pressurized liquefied gas from the boosting pump 30 and forcibly vaporizing the pressurized liquefied gas; a second line L2 provided on the evaporation gas compressor 50 A first heater 43 for raising the liquefied gas forcedly vaporized in the forced vaporizer 41 before it is combined with the compressed evaporated gas in the liquefied gas storage tank 10 and the propulsion engine 21, A first line L1 having a compressor 50 and a liquefied gas storage tank 10 and a second line L1 connected to an evaporative gas compressor 50 downstream of the booster pump 30 and a forced vaporizer 41 And a second line L2 having a first heater 43 as main components.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the first line L1, And an evaporative gas compressor (50). The gas processing system 1 according to the embodiment of the present invention connects the downstream of the evaporative gas compressor 50 on the first line L1 of the liquefied gas storage tank 10 through the second line L2, The booster pump 30, the forced vaporizer 41 and the first heater 43 are provided on the second line L2 so that the fuel supplied to the propulsion engine 21 through the first line L1 can be replenished have.

Here, the evaporative gas compressor (50) can be designed to have a capacity capable of treating all naturally occurring evaporative gases generated in the liquefied gas storage tank (10) at the maximum processing capacity.

In addition, in the embodiment of the present invention, the first heater 43 may be provided on the downstream side of the forced vaporizer 41 on the second line L2.

The first heater 43 does not raise the liquefied gas forcedly vaporized in the forced vaporizer 41 when the temperature of the evaporated gas compressed in the evaporated gas compressor 50 is equal to or higher than the predetermined temperature, If the temperature of the compressed evaporated gas is lower than the predetermined temperature, the forced vaporized liquefied gas can be heated by the forced vaporizer 41. At this time, the predetermined temperature is a temperature required by the propulsion engine 21, for example, 40 to 50 degrees, and preferably about 45 degrees.

Here, the control of the first heater 43 may be implemented through a separate control unit (not shown) and a control unit (not shown), and there may be a temperature sensor and associated electronic devices have.

Also, the first heater 43 can be used only in a collinear state. When the ship is in a collimated state, since the evaporated gas generated in the liquefied gas storage tank 10 is small, the temperature of the evaporated gas discharged from the evaporated gas compressor 50 may be low. In this case, the temperature of the forced vaporized liquefied gas supplied through the second line (L2) can be relatively increased to improve the final temperature of the fuel supplied to the propulsion engine (21).

Here, the collinear state refers to a state at the time of ballast voyage in which the liquefied gas is almost empty in the liquefied gas storage tank 10 provided in the vessel.

The gas processing system 1 according to the embodiment of the present invention effectively controls the flow rate of the liquefied gas and / or the evaporating gas supplied to the forced vaporizer 41, the first heater 43, and the LNG vaporizer 60, A technique for reducing the load on the vaporizer 41, the first heater 43, and the LNG vaporizer 60 and enabling efficient temperature control.

2, the gas processing system 1 according to the embodiment of the present invention includes a forced vaporizer 41 for supplying a pressurized liquefied gas from the booster pump 30 and forcibly vaporizing the gas, a forced vaporizer 41 An LNG vaporizer 60 for supplying a liquefied gas from an external reservoir to vaporize the liquefied gas and returning the liquefied gas to the liquefied gas storage tank 10, The second line L2 (L2) is connected to the storage tank 10 and the evaporation gas compressor 50 on the first line L1, and includes a boosting pump 30, a forced vaporizer 41 and a first heater 43. The second line L2 And a third line L3 connecting the external storage and the liquefied gas storage tank 10 and having the LNG vaporizer 60. [

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the second line L2, A boosting pump 30, a forced vaporizer 41, and a first heater 43. [ Also, in the embodiment of the present invention, the LNG vaporizer 60 may be provided by connecting the external storage to the liquefied gas storage tank 10 through the third line L3.

In addition, in the embodiment of the present invention, the liquefied gas and / or the evaporation gas introduced into the LNG vaporizer 60 on the third line L3 and the forced vaporizer 41 or the first heater 43 on the second line L2 The apparatus may further include a flow rate adjusting device for adjusting the flow rate of the gas.

The flow rate regulating device may be equally or similarly provided to each of the forced vaporizer 41, the first heater 43 and the LNG vaporizer 60. For example, the flow rate adjusting device may be provided in the forced vaporizer 41 Explain it. The present flow rate regulating device is not limited to the forced vaporizer 41, the first heater 43 or the LNG vaporizer 60 described above.

The flow rate regulating device is connected to the forced vaporizer 41 by bypassing the flow rate regulating pipes CL1 to CL6 and the flow rate regulating pipes CL1 to CL5, And may include control valves 411 to 417.

Specifically, the flow rate control pipes CL1 to CL6 may be constituted by the first to sixth flow rate control lines CL1 to CL6.

The first flow rate control line CL1 may be connected by bypassing the forced vaporizer 41 on the second line L2 and may include a third control valve 413. [ Accordingly, the first flow rate control line CL1 can regulate the flow rate of the liquefied gas and / or the evaporated gas flowing into the forced vaporizer 41, and the liquefied gas discharged from the forced vaporizer 41 and / The temperature of the gas can be controlled.

For example, in order to reduce the flow rate of the liquefied gas and / or the evaporated gas flowing into the forced vaporizer 41, the flow rate can be bypassed to the first flow rate control line CL1, The liquefied gas and / or the evaporated gas can be bypassed to the first flow rate control line CL1 to lower the temperature. Here, the third regulating valve 413 regulates the flow rate and / or pressure of the liquefied gas and the evaporating gas flowing on the first flow rate regulating line CL1.

In addition, the end of the first flow rate control line CL1 connected to the downstream of the forced vaporizer 41 may be branched in parallel and connected to the second line L2. Thereby, there is an effect that further fine adjustment of the temperature of the liquefied gas and / or the evaporated gas vaporized and discharged from the forced vaporizer 41 is enabled.

The second flow rate control line CL2 may be connected to the first flow rate control line CL1 by bypassing the third control valve 413 and may include a fourth control valve 414. [ Here, the fourth control valve 414 may be connected to the third control valve 413 in parallel, and may be configured to have the same capacity for treating the liquefied gas and / or the evaporative gas, , You can back up each other.

Accordingly, the second flow rate control line CL2 and the fourth control valve 414 are provided with a valve backup system for controlling the pressure of the forced vaporizer 41 and adjusting the flow rate, thereby improving the stability.

The fourth control valve 414 is connected to the third control valve 413 in parallel and is configured to be smaller than or equal to the flow control unit of the third control valve 413 so that the control of the fine flow rate is performed Can be performed.

Usually, the range in which the valve performs the flow control is about 10 to 15% of the upper and lower levels of the flow rate of the valve, so that the smaller the flow rate of the valve, the smaller the flow rate can be controlled. For example, when the flow rate of the third regulating valve 413 is 100 and the flow rate of the fourth regulating valve 414 is 50, the third regulating valve 413 can process the flow rate from 5 to 95 , And the fourth control valve 414 can be operated at a flow rate of 2.5 to 47.5. That is, the fine flow rate adjustment that the third control valve 413 can not process can be solved by the addition of the fourth control valve 414.

Accordingly, it is possible to control the flow rate more precisely than to perform the flow rate adjustment with only the fourth control valve 414.

The third flow rate control line CL3 may be connected by bypassing the first control valve 411 on the second line L2 and may include a second control valve 412. [ The second regulating valve 412 is connected to the first regulating valve 411 in parallel so that the capacity for treating the liquefied gas and / or the evaporating gas has the same capacity, Or may be configured to be smaller than or equal to the flow rate control unit of the first control valve 411, so that the detailed flow rate control can be performed by integrated drive.

The fourth flow rate control line CL4 may be connected by bypassing the first flow rate control line CL1 on the second line L2 and may include a fifth control valve 415 and a seventh control valve 417 have. Here, the seventh control valve 417 may be a block valve. The seventh regulating valve 417 can be controlled so that only the setting flow rate value is passed when the setting flow rate value is arbitrarily set.

The fifth flow rate control line CL5 is connected to the fourth flow rate control line CL4 by bypassing the fifth control valve 415 and may include a sixth control valve 416. [ The sixth control valve 416 is connected to the fifth control valve 415 in parallel so that the capacity for treating the liquefied gas and / or the evaporating gas is set to have the same capacity and are cross-driven to back up each other Or may be configured to be smaller than or equal to the flow control unit of the fifth control valve 415, so that the fine control of the flow rate can be performed by integrally driving.

The sixth flow rate control line CL6 may be branched on the fourth flow rate control line CL4 between the fifth control valve 415 and the seventh control valve 417 and connected to the second line L2. The sixth flow rate control line CL6 is provided without the control valve and can supply the remaining flow rate to the second line L2 according to the set flow rate value of the seventh control valve 417. [ At this time, the sixth flow rate adjusting line CL6 may be connected downstream of the portion to which the fourth flow rate adjusting line CL4 on the second line L2 is connected, the end connected to the second line L2.

As described above, the gas processing system 1 according to the embodiment of the present invention is provided with the forced vaporizer 41 or the first heater 43 on the second line L2 and the LNG vaporizer 60 on the third line L3 The flow rate of the liquefied gas and / or the evaporating gas can be effectively controlled by controlling the flow rate of the liquefied gas and / or the evaporating gas introduced into the apparatus, and the flow rate of the liquefied gas and / The load of the heat exchanger 60 can be reduced, and efficient temperature control can be achieved. In addition, since the conventional valve can be backed up, the reliability of the flow rate control can be improved.

The gas processing system 1 according to the embodiment of the present invention is configured such that the fourth line L4 in which the H / D compressor 51 is provided is not limited to the liquefied gas storage tank 10, (Not shown) to effectively treat the evaporated gas generated in the liquefied gas storage tank 10 even in emergency situations.

1, a gas processing system 1 according to an embodiment of the present invention includes an evaporative gas compressor 50 for compressing an evaporative gas generated in a liquefied gas storage tank 10, a liquefied gas A second heater 511 for heating the evaporated gas compressed by the H / D compressor 51, a liquefied gas storage tank 10, and an evaporator 50. The H / D compressor 51 compresses the evaporation gas generated in the storage tank 10, The first line L1 having the evaporative gas compressor 50 and the evaporated gas generated in the liquefied gas storage tank 10 are connected to the liquefied gas storage tank 10 again A fourth line L4 having an H / D compressor 51 and a fifth line L4 branched from the rear end of the second heater 511 on the fourth line L4 and connected to the gas- L5) as a main configuration.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the first line L1, And an evaporative gas compressor (50). In the embodiment of the present invention, the evaporation gas generated in the liquefied gas storage tank 10 through the fourth line L4 is connected again to the liquefied gas storage tank 10, and the fourth line L4 The H / D compressor 51 may be provided.

In addition, the embodiment of the present invention may further include a fifth line L5 branched from the rear end of the second heater 511 on the fourth line L4 and connected to the gas combustion device 23. [

Conventionally, when the evaporative gas can not be consumed in the propulsion engine 21 or the power generation engine 22, or when the evaporative gas compressor 50 can not process the evaporative gas (for example, malfunction or stoppage) There is a possibility that the liquefied gas storage tank 10 may have a problem in terms of safety because the evaporated gas generated in the liquefied gas storage tank 10 can not be processed.

Therefore, in the embodiment of the present invention, the H / D compressor 51 provided at all times is designed to back up or assist the evaporative gas compressor 50 to solve the above problems. The H / D compressor 51 is branched from the rear end of the second heater 511 on the fourth line L4 so as to be substantially backed up or assisted by the evaporative gas compressor 50, The fifth line L5 is newly added.

That is, in the embodiment of the present invention, when the evaporative gas can not be consumed in the propulsion engine 21 or the power generation engine 22, or when the evaporative gas compressor 50 can not process the evaporative gas, the H / D compressor 51 can be operated to supply the evaporated gas generated from the liquefied gas storage tank 10 to the gas combustion apparatus 23 or to supply the H / D compressor 51 when the evaporative gas compressor 50 needs to be backed up or assisted. The power generation engine 22 or the gas combustion apparatus 23 by supplying the evaporated gas generated from the liquefied gas storage tank 10 to the propulsion engine 21, the power generation engine 22,

Accordingly, the gas processing system 1 according to the embodiment of the present invention has the effect of promptly coping with an emergency even in an emergency, and the safety and reliability of the system can be improved.

The gas processing system 1 according to the embodiment of the present invention is a system in which the evaporation gas compressor 50 is capable of operating in a liquefied gas storage tank 10 with a capacity capable of treating all the naturally occurring evaporation gases generated in a full- And the driving of the evaporative gas compressor 50 and the system lines L1 and L2 is controlled so that the liquefied gas and / or the evaporated gas are supplied to the propulsion engine 21 from the liquefied gas storage tank 10, And improving the system stability and reliability by supplying the system efficiently and effectively.

1, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, a liquefied gas storage tank 10 A forced vaporizer 41 for supplying a pressurized liquefied gas from the boosting pump 30 and forcibly vaporizing the pressurized liquefied gas; a liquefied gas storage tank 10 and a propelling engine 21; A first line L1 having an evaporative gas compressor 50, a liquefied gas storage tank 10 and an evaporation gas compressor 50 downstream on the first line L1, And a control section 71 for controlling the liquefied gas and / or the evaporating gas flowing on the second line L2, the first line L1 and the second line L2 having the forced vaporizer 41, As shown in FIG.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the first line L1, And an evaporative gas compressor (50). Here, the evaporative gas compressor (50) can be designed to have a capacity capable of treating all naturally occurring evaporative gases generated in the liquefied gas storage tank (10) at the maximum processing capacity. The gas processing system 1 according to the embodiment of the present invention connects the downstream of the evaporative gas compressor 50 on the first line L1 of the liquefied gas storage tank 10 through the second line L2, The booster pump 30, the forced vaporizer 41 and the first heater 43 are provided on the second line L2 so that the fuel supplied to the propulsion engine 21 through the first line L1 can be replenished have.

In addition, the embodiment of the present invention may further include a control unit 71 for controlling the liquefied gas and / or the evaporating gas flowing on the first line L1 and the second line L2.

The control unit 71 can control the flow of the evaporating gas and / or the liquefied gas on the first line L1 and the second line L2 by comparing the speed of the ship with the predetermined speed. Here, the predetermined speed refers to a speed at which the ship is propelled when only the natural evaporation gas generated in the liquefied gas storage tank 10 is consumed by the propulsion engine 21, for example, 15 to 19 knots, (Preferably 17 knots)

Specifically, when the speed of the ship is within the predetermined speed, the control unit 71 controls to supply the evaporative gas in the liquefied gas storage tank 10 to the propulsion engine 21 only through the first line L1, To supply the liquefied gas and / or the evaporated gas in the liquefied gas storage tank 10 to the propulsion engine 21 through the first line L1 and the second line L2 when the speed of the liquefied gas storage tank 10 exceeds the predetermined speed, can do.

The control unit 71 compares the amount of spontaneously generated gas generated in the liquefied gas storage tank 10 with the amount of fuel required by the propulsion engine 21 as well as the above control to determine whether the first line L1 or the second line Lt; RTI ID = 0.0 > L2) < / RTI >

The controller 71 controls the liquefied gas storage tank 10 through the first line L1 and the second line L2 when the amount of fuel required by the propulsion engine 21 is greater than the amount of the naturally- When the amount of fuel required by the propulsion engine 21 is less than the amount of the naturally occurring evaporated gas, the liquefied gas is supplied only through the first line L1, It is possible to control the evaporation gas in the storage tank 10 to be supplied to the propulsion engine 21, the power generation engine 22, or the gas combustion device 23. [

Here, the control unit 71 may include various control devices (not shown) for realizing the above-described control. An example of such a control device is a valve (not shown) and an electronic device Not).

The control of the control unit 71 as described above enables economical control and optimized control of the operation of the evaporative gas compressor 50.

In addition, in the embodiment of the present invention, a liquefaction device 530 can be installed. (See Fig. 3) The liquefaction device 530 is a device that liquefies the evaporation gas using a separate refrigerant (nitrogen or mixed refrigerant) And the evaporated gas compressed at a low pressure can be effectively re-liquefied.

Specifically, the re-liquefier 530 is supplied with the evaporation gas pressurized by the evaporation gas compressor 50 at 15 to 20 bar, and is re-liquefied, and is supplied to the gas-liquid separator 531. The re-liquefied evaporated gas is separated into a liquid phase and a vapor phase by the gas-liquid separator 531, the liquid phase returns to the liquefied gas storage tank 10, the vapor phase joins with the evaporated gas discharged from the liquefied gas storage tank 10 again, Can be supplied to the gas compressor (50).

In the embodiment of the present invention in which low-pressure liquefied gas or evaporation gas is used as the fuel for propelling the ship in this way, by providing the re-liquefier 530 having a separate refrigerant, it is possible to efficiently process the evaporated gas There is an effect of canceling.

The gas processing system 1 according to the embodiment of the present invention is provided with the sixth line L6 for supplying the evaporation gas generated in the liquefied gas storage tank 10 to the gas combustion device 23 without any additional pressure means Thereby reducing the construction cost of the system and effectively managing the internal pressure of the liquefied gas storage tank 10.

1, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, a liquefied gas storage tank 10 A first line L1 connecting the liquefied gas storage tank 10 and the propulsion engine 21 and having an evaporative gas compressor 50, The sixth line L6 that connects the gas storage tank 10 and the gas combustion device 23 and does not include a separate pressurizing means.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the first line L1, And an evaporative gas compressor (50).

The sixth line L6 connects the liquefied gas storage tank 10 and the gas combustion device 23 without any separate pressurizing means and is connected to the liquefied gas storage tank 10 Can be supplied to the gas-combustion device 23. [0050]

Conventionally, a compressor has to be always provided in a line connecting the gas combustion device 23 and the liquefied gas storage tank 10 to supply the evaporative gas generated in the liquefied gas storage tank 10 to the gas combustion device 23. The gas combustion device 23 is required to be able to burn the evaporation gas at a certain pressure (for example, 3 to 5 bar), and accordingly, a pressurizing means is required to pressurize the evaporation gas generated in the liquefied gas storage tank 10 . The installation of such pressure means has caused problems of increase in the construction cost and lack of space in the ship.

Therefore, in the embodiment of the present invention, the evaporation gas generated in the liquefied gas storage tank 10 is supplied to the gas combustion device 23 at the internal pressure of the liquefied gas storage tank 10 without any additional pressurizing means, It is possible to solve the problems such as reduction of the construction cost and securing the space in the ship.

 The sixth line L6 has no pressing means and therefore has a diameter equal to that of the conventional line, the amount of the evaporative gas supplied to the gas combustion device 23 is reduced, and the evaporative gas in the liquefied gas storage tank 10 is efficiently A problem that can not be solved occurs.

Accordingly, in the embodiment of the present invention, the sixth line L6 may have a diameter larger than the diameter of the conventional line instead of having a separate pressurizing means, and the evaporation gas generated in the liquefied gas storage tank 10 So as not to be delayed in supplying the gas to the gas combustion device 23. Here, the first line (L1) is different from the line supplying the evaporation gas to the gas combustion device (23) when the internal pressure of the conventional liquefied gas storage tank (10) rises, but the diameters thereof may be the same. In other words, in the embodiment of the present invention, the sixth line L6 may have a larger diameter than the diameter of the first line L1.

In the embodiment of the present invention, the gas combustion device 23 includes a first burner portion (not shown) for consuming a vaporized gas having a first pressure, a second burner portion for consuming a vaporized gas having a second pressure (Not shown). Here, the first a-th line L1a branched at the downstream of the evaporative gas compressor 50 in the first line L1 may be connected to the first burner portion and the sixth line L6 may be connected to the second burner portion . Here, the first pressure may be between 3 and 5 bar, and the second pressure may be between 1 and 2 bar.

Here, the first burner part consumes excess evaporative gas when excessively large compressed evaporative gas is supplied to the propulsion engine 21 through the evaporative gas compressor 50, and the second burner part is connected to the liquefied gas storage tank 10 In the case where the internal pressure of the liquefied gas storage tank 10 rises due to an abrupt increase in the amount of evaporation gas generated in the liquefied gas storage tank 10,

As described above, in the embodiment of the present invention, by providing the sixth line L6 without additional pressurizing means, it is possible to effectively manage the internal pressure of the liquefied gas storage tank 10, minimize the construction cost, .

The gas processing system 1 according to the embodiment of the present invention is a system in which the second heater 511 used for existing warming up when the evaporation gas is heated during the warming up and the forced vaporizer 41 forced by the forced vaporizer 41 The first heater 43 for raising the liquefied gas is used together. By reducing the heating capacity of the second heater 511 used in the conventional warm-up, the heater construction cost can be reduced and the heater can be used optimally Or < / RTI >

4, the gas treatment system 1 according to the embodiment of the present invention includes a forced vaporizer 41 for supplying a pressurized liquefied gas from the boosting pump 30 and forcibly vaporizing the gas, a forced vaporizer 41 A H / D compressor 51 for compressing the evaporated gas generated in the liquefied gas storage tank 10 during loading or unloading, a first heater 43 for supplying and heating the supplied forced vaporized liquefied gas, A second heater 511 for heating the evaporation gas compressed by the compressor 51, a booster pump 30 for connecting the liquefied gas storage tank 10 and the propulsion engine 21, a forced vaporizer 41, A second line L2 provided with the compressor 43 and an H / D compressor 51 connected to the liquefied gas storage tank 10 so that the evaporated gas generated in the liquefied gas storage tank 10 is reintroduced into the liquefied gas storage tank 10 A seventh line L4 for connecting the second line L2 and the fourth line L4 at the upstream of the first heater 43 and the second heater 511, and a seventh line L7b connecting the second line L2 and the fourth line L4 on the downstream side of the first heater 43 and the second heater 511 as main components.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the second line L2, A boosting pump 30, a forced vaporizer 41, and a first heater 43. [ The gas processing system 1 according to the embodiment of the present invention is arranged so that the evaporated gas generated in the liquefied gas storage tank 10 through the fourth line L4 is returned to the liquefied gas storage tank 10 again And includes an H / D compressor 51 and a second heater 511. [

In addition, in the embodiment of the present invention, the seventh line L7a connecting the second line L2 and the fourth line L4 at the upstream of the first heater 43 and the second heater 511, And a seventh line L7b connecting the second line L2 and the fourth line L4 downstream of the heater 43 and the second heater 511. [

That is, the second line L2 and the fourth line L4 through the seventh line L7a and the seventh line L7b are connected to the first heater 43 and the second heater 511 either upstream or downstream of the first heater 43 and the second heater 511 And the first heater 43 and the second heater 511 may be provided in parallel with each other.

At this time, the first heater 43 and the second heater 511 can be designed to have a capacity capable of raising the temperature of the evaporation gas generated during the loading or unloading of the liquefied gas, 2 heater 511 can assist the first heater 43.

Specifically, the first heater 43 is designed to have a capacity capable of raising the temperature of the liquefied gas forcedly vaporized by the forced vaporizer 41, and the second heater 511 is designed to have a capacity for raising or lowering the liquefied gas And the capacity of the first heater 43 is subtracted from the capacity for raising the temperature of the evaporation gas generated when the first heater 43 is generated.

For example, assuming that the capacity for raising the temperature of all of the evaporation gases generated when liquefied gas is loaded or unloaded is 100, and the capacity for raising the temperature of the liquefied gas forcedly vaporized by the forced vaporizer 41 is 40, The heating capacity of the first heater 43 can be set to 40 and the heating capacity of the second heater 511 can be set to 60. [

In the conventional case, the amount of the evaporation gas generated when the liquefied gas is loaded or unloaded is very large, and the capacity of the heater for treating the evaporator is very large. This has a disadvantage that the heater construction cost is increased and a lot of space is required to be secured.

In order to solve such a problem, the gas processing system 1 according to the embodiment of the present invention is designed such that the first and second heaters 43 and 511 are designed and the seventh line L7a and the seventh line L7b When the fuel is supplied to the propulsion engine 21 through the existing forced vaporizer 41, only the first heater 43 is operated. When the evaporation gas generated upon loading or unloading the liquefied gas is heated, By controlling both the first heater 43 and the second heater 511 to operate, it is possible to reduce the heater construction cost and optimize the use of the heater.

Here, the control of the first heater 43, the second heater 511, the seventh line L7a, and the seventh line L7b is performed through a separate control unit (not shown) and a control unit (not shown) There can be a control valve and an electronic device associated therewith as an example of the control device.

The gas processing system 1 according to the embodiment of the present invention may include a technique for making it possible to omit a separate heater by using a six-stage compressor as the evaporative gas compressor 50. [

1, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, A first line L1 connecting the liquefied gas storage tank 10 and the propulsion engine 21 and having an evaporative gas compressor 50, a liquefied gas storage tank 10 connected to the propulsion engine 21, The second line L2 (L2), which includes the boosting pump 30, the forced vaporizer 41 and the first heater 43, which connects the gas storage tank 10 and the downstream of the evaporative gas compressor 50 on the first line L1, ) As a main component.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the first line L1, And an evaporative gas compressor (50). The gas processing system 1 according to the embodiment of the present invention connects the downstream of the evaporative gas compressor 50 on the first line L1 of the liquefied gas storage tank 10 through the second line L2, The booster pump 30, the forced vaporizer 41 and the first heater 43 are provided on the second line L2 so that the fuel supplied to the propulsion engine 21 through the first line L1 can be replenished have.

In addition, in the embodiment of the present invention, the evaporation gas compressor 50 can compress the evaporation gas to 15 to 20 bar so as to discharge the evaporation gas to the temperature required by the propulsion engine 21. [

In the conventional case where the evaporative gas compressor is provided in four stages, there is a problem that the temperature discharged from the evaporative gas compressor is low and a separate heater is required.

Therefore, in the embodiment of the present invention, the evaporative gas compressor (50) is formed into a six-stage centrifugal or two-stage screw type so that the evaporative gas compressor (50) compresses the evaporative gas at 15 to 20 bar, It is possible to obtain the temperature required by the heat exchanger 21. Accordingly, the gas processing system 1 according to the embodiment of the present invention may not have a separate heater on the first line L1.

As described above, in the embodiment of the present invention, the heater can be omitted at the end of the evaporative gas compressor (50), thereby reducing the construction cost of the system and maximizing the space utilization of the ship.

The gas processing system 1 according to the embodiment of the present invention allows the boosting pump 30 to pressurize the liquefied gas at 15 to 20 bar and then supply it to the gas-liquid separator 42, Lt; RTI ID = 0.0 > methane < / RTI >

The methane-regulating operation is an operation for removing heavy carbon (propane, butane, etc.) among the components in the vaporized liquefied gas, whereby the methane value of the vaporized liquefied gas supplied to the power generation engine 22 is higher than the methane price required by the power generation engine 22 And the like. This is to prevent the knocking phenomenon from occurring in the power generation engine 22.

Specifically, the naturally occurring vaporized gas is composed mainly of methane, so that the methane price is higher than the methane price required by the power generation engine 22, so that no special care is required. However, in addition to methane, the forced gasification gas may contain heavy hydrocarbons such as ethane, propane, (HHC: heavy carbon) contained in the methane gas, which may be lower than the methane price required by the power generation engine 22.

For this purpose, conventionally, forced vaporization gas is maintained at a low temperature through separate cooling so that the heavy carbon components remain in the liquid phase and are filtered out in the gas-liquid separator. Usually the heavy carbon corresponds to a boiling point of approximately -80 ° C at 5 bar and at -78 ° C corresponds to a boiling point of -70 ° C.

1, the gas processing system 1 according to the embodiment of the present invention includes a boosting pump 30 for pressurizing the liquefied gas stored in the liquefied gas storage tank 10, A gas-liquid separator 42 that receives the liquefied gas forcedly vaporized from the forced vaporizer 41 to regulate methane gas, a liquefied gas storage tank 10, and a propulsion engine 21 And a second line L2 having a booster pump 30, a forced vaporizer 41, and a gas-liquid separator 42. The gas-

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the second line L2, The booster pump 30, the forced vaporizer 41 and the gas-liquid separator 42 to supply the methane-regulated fuel to the propulsion engine 21 in the gas-liquid separator 42 in the second line L2.

In addition, in the embodiment of the present invention, the boosting pump 30 compresses the liquefied gas stored in the liquefied gas storage tank 10 to 15 to 20 bar and then supplies the liquefied gas to the forced vaporizer 41. In the forced vaporizer 41, Liquid separator 42. The gas-liquid separator 42 can perform the methane-regulating operation by separating the liquefied gas forcedly vaporized from the forced vaporizer 41 by gas-liquid separation without a separate cooling device.

In the conventional case, the boosting pump pressurizes the liquefied gas stored in the liquefied gas storage tank to 5 to 7 bar and supplies it to the forced vaporizer, and the forced vaporizer forcibly vaporizes the liquefied gas and supplies it to the gas-liquid separator. And is supplied with the forced vaporized liquefied gas.

In the case of using as propellant engine fuel as it is natural evaporation gas, evaporation gas is changed from liquefied gas to evaporated gas and methane price is controlled, so methane control is unnecessary, while forced vaporization of liquefied gas is forced In order to supply fuel to the engine, methane should be controlled and supplied.

Specifically, in the conventional methane gas control, the liquefied gas pressurized to 5 bar by a boosting pump was heated to -65 to -75 degrees at -163 degrees in a forced vaporizer, cooled to -80 degrees or less and supplied to a gas-liquid separator . At this time, among the forced vaporized liquefied gas of 5 bar -80 degrees, the heavicarbon drops below the boiling point, so that it remains in the liquid state, and the other carbon is supplied to the propulsion engine in the vapor state. In other words, methane control is the process of lowering methane prices.

As described above, in the conventional case, the gas-liquid separator has a problem that separate cooling is required to control methane gas by controlling the driving of the booster pump at 5 bar to 7 bar. Furthermore, the cooling operation may be performed by liquefied gas stored in the liquefied gas storage tank, which causes disadvantages in terms of preserving the transportation.

In order to solve this problem, in the embodiment of the present invention, the booster pump 30 controls the liquefied gas to be pressurized at 15 to 20 bar when supplying the liquefied gas forcedly vaporized to the propulsion engine 21 as described above, Liquid separator 42 without the need for a cooling device.

When the liquefied gas is pressurized at 15 to 20 bar, even if heated to -65 to -75 degrees at -163 degrees in the forced vaporizer, the boiling point does not exceed the boiling point of the heavy carbon (boiling point increases to -70 at 17 bar) . Therefore, methane can be regulated in the gas-liquid separator 42 even without a separate cooling device.

As described above, in the embodiment of the present invention, the boosting pump 30 controls the liquefied gas to be pressurized at 15 to 20 bar when the liquefied gas forcedly vaporized to the propulsion engine 21 is supplied, The methane price can be controlled in the separator 42, thereby reducing the system construction cost and maximizing the protection of the transportation.

In addition, in the embodiment of the present invention, when the propulsion engine 21 malfunctions or stops operating, the boosting pump 30 pressurizes the liquefied gas stored in the liquefied gas storage tank 10 at 5 to 10 bar, To the power generation engine (22). At this time, the forced vaporizer 41 may heat the liquefied gas pressurized at 5 to 10 bar to only the temperature of -90 to -130 degrees, forcibly vaporize it, and then supply it to the gas-liquid separator 42. In this case, the heavy carbon in the forced vaporized liquefied gas does not exceed the boiling point (the boiling point is -80 at 5 bar), so that it remains in the liquid phase and the methane content can be controlled.

As described above, in the embodiment of the present invention, the pressurization pressure of the boosting pump 30 is adjusted according to the operating condition of the propulsion engine 21, and the boiling point of the methane control is controlled according to the operating condition of the propulsion engine 21, Liquid separator 42 without the need for a device. This reduces the cost of building the system and allows maximum protection of the shipment.

The gas processing system 1 according to the embodiment of the present invention is configured such that the pressure discharged by the evaporative gas compressor 50 is discharged in accordance with the pressure required by the power generation engine 22 in accordance with the operating condition of the propulsion engine 21 ≪ / RTI >

1, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, A control unit 72 for controlling the fuel inflow pressure of the power generation engine 22 based on the determination of whether or not the gas turbine 10 is operating, And a seventh line L7 branched downstream of the evaporative gas compressor 50 on the first line L1 and connected to the power generation engine 22 as main components.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 through the first line L1, An evaporative gas compressor 50 may be provided to supply the evaporative gas compressed by the evaporative gas compressor 50 to the propulsion engine 21. Further, the gas processing system 1 according to the embodiment of the present invention can cause the pressure to be discharged by the evaporative gas compressor 50 to be discharged in accordance with the pressure required by the power generation engine 22.

In addition, in the embodiment of the present invention, the controller 72 controls the fuel inflow pressure of the power generation engine 22 by determining whether or not the propulsion engine 21 is operated. The control unit 72 is disposed upstream of the evaporation gas compressor 50, A flow control device 501 for controlling the flow rate of the evaporation gas flowing into the compressor 50, an eighth line L8 returning upstream in the downstream of the evaporation gas compressor 50, (502) disposed downstream of the valve (50).

The control unit 72 has three embodiments for determining whether the propulsion engine 21 is operating and controlling the fuel inflow pressure of the power generation engine 22 and will be described below.

The control unit 72 determines whether to supply the evaporated gas compressed in the evaporative gas compressor 50 to either the propulsion engine 21 or the power generation engine 22 so that the evaporated gas compressor 50 (Hereinafter referred to as " variable-frequency drive ") for compressing and discharging the evaporated gas to a pressure required by the propulsion engine 21 or compressing and discharging the compressed gas to a pressure required by the power generation engine 22. [ ). Here, the pressure required by the propulsion engine 21 may be 15 to 20 bar, and the pressure required by the power generation engine 22 may be 5 to 10 bar.

Specifically, when the propulsion engine 21 malfunctions or stops operating, the control unit 72 can stop the driving of the propulsion engine 21 and start the power generation engine 22. The control unit 72 controls the evaporative gas compressor 50 in a variable frequency drive so that the evaporative gas compressor 50 compresses and discharges the evaporative gas to a pressure required by the power generation engine 22, 50 may be supplied to the power generation engine 22 instead of the propulsion engine 21. [

The gas processing system 1 according to the embodiment of the present invention may further include a second line L2 having a boosting pump 30 and a forced vaporizer 41. [

At this time, the control unit 72 controls variable speed drive of the booster pump 30 as well as the evaporative gas compressor 50 so that when the booster pump 30 supplies the liquefied gas to the propulsion engine 21 21 so that the boosting pump 30 pressurizes the liquefied gas to a pressure required by the power generation engine 22 when the power generation engine 22 is supplied with power.

As described above, according to the embodiment of the present invention, the evaporative gas compressor 50 is controlled by the variable frequency drive through the control unit 72, so that the pressure of the evaporative gas It is possible to supply the fuel to the power generation engine 22 by adjusting the pressure, thereby reducing the construction cost and enabling the supply of the fuel in a flexible manner.

The control unit 72 determines whether the evaporated gas compressed in the evaporative gas compressor 50 is to be supplied to either the propulsion engine 21 or the power generation engine 22. In the second embodiment, Or the flow of liquefied and / or evaporated gas flowing on the eighth line (L8).

More specifically, when the propulsion engine 21 malfunctions or stops operating, the control unit 72 controls at least a part of the evaporated gas discharged from the evaporative gas compressor 50 to flow on the eighth line L8, The pressure of the evaporated gas discharged from the gas compressor (50) can be the pressure required by the power generation engine (22). Here, the evaporation gas flowing on the eighth line L8 may be supplied upstream of the evaporative gas compressor 50, and the valve 502 may be a three-way valve.

At this time, the control unit 72 controls the remaining part of the evaporated gas discharged from the evaporative gas compressor 50 to be the pressure required by the power generation engine 22 to flow on the seventh line L7, It is possible to control so that the evaporated gas compressed in the compressor 50 is supplied to the power generation engine 22 instead of the propulsion engine 21. [

As described above, in the embodiment of the present invention, by controlling at least a part of the evaporative gas discharged from the evaporative gas compressor 50 through the control unit 72 to return to the upstream of the evaporative gas compressor 50, The pressure of the evaporation gas can be adjusted to the pressure required by the power generation engine 22 according to the state and supplied to the power generation engine 22. [

The control unit 72 determines whether the evaporated gas compressed in the evaporative gas compressor 50 is to be supplied to either the propulsion engine 21 or the power generation engine 22 and then the evaporated gas compressor 50, Can control the flow control device 501 so as to compress the evaporation gas to a pressure required by the propulsion engine 21 or a pressure required by the power generation engine 22. [ Here, the flow rate control device 501 may be an inlet guide vane (IGV), and controls the flow rate of the evaporation gas flowing into the evaporation gas compressor 50 to control the evaporation gas discharged from the evaporation gas compressor 50 So that the pressure of the fluid can be adjusted passively.

More specifically, when the propulsion engine 21 malfunctions or stops operating, the control unit 72 operates the flow control device 501 so that the flow rate of the evaporative gas flowing into the evaporative gas compressor 50 is reduced, So that the evaporative gas compressor (50) compresses the evaporative gas to a pressure required by the power generation engine (22).

At this time, the control unit 72 can implement the third embodiment by operating the flow control device 501 and the valve 502 provided downstream of the evaporative gas compressor 50 together.

The control unit 72 increases the opening degree of the valve 502 and activates the flow rate control device 501 so that the evaporated gas compressor 50 is supplied with the reduced evaporated gas amount when the propulsion engine 21 malfunctions or stops operating, When the propulsion engine 21 is operating normally, the opening of the valve 502 is reduced and the flow control device 501 is stopped, so that the evaporation gas So that the compressed evaporative gas discharged from the compressor (50) can be supplied to the propulsion engine (21).

As described above, in the embodiment of the present invention, the flow rate control device 501 is controlled through the control unit 72 to control the flow rate of the evaporative gas flowing into the evaporative gas compressor 50, The pressure of the evaporation gas can be adjusted to the pressure required by the power generation engine 22 according to the state of the propulsion engine 21 and supplied to the power generation engine 22.

The gas processing system 1 according to the embodiment of the present invention is constructed such that the LNG vaporizer 60 performed at the time of gassing-up is assisted by the forced vaporizer 41, To improve the safety of the user.

7, the gas processing system 1 according to the embodiment of the present invention includes a boosting pump 30 for pressurizing the liquefied gas stored in the liquefied gas storage tank 10, A forced vaporizer 41 for supplying a liquefied gas and forcibly vaporizing the liquefied gas, a liquefied gas supplied from an external reservoir (Shore), or a liquefied gas supplied from the liquefied gas storage tank 10 to be vaporized and returned to the liquefied gas storage tank 10 A second line L2 connecting the liquefied gas storage tank 10 and the propulsion engine 21 and including a boosting pump 30 and a forced vaporizer 41; an external storage and liquefied gas storage The third line L3 and the second line L2 having the LNG vaporizer 60 connecting the tank 10 or connecting the liquefied gas storage tank 10 and the liquefied gas storage tank 10, And a ninth line L9 connecting the line L3.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the second line L2, The booster pump 30 and the forced vaporizer 41 so that the liquefied gas forcedly vaporized by the forced vaporizer 41 can be supplied to the propulsion engine 21. [ It is also possible to connect the external reservoir and the liquefied gas storage tank 10 via the third line L3 or connect the liquefied gas storage tank 10 and the liquefied gas storage tank 10 And then connected to another liquefied gas storage tank 10 after the LNG vaporizer 60 is connected to the LNG vaporizer 60. The LNG vaporizer 60 is provided to vaporize the liquefied gas during the up- To the gas storage tank (10).

The reason why the third line L3 connects the liquefied gas storage tank 10 and the liquefied gas storage tank 10 is that a plurality of liquefied gas storage tanks 10 are provided on the ship The liquefied gas storage tank 10 and the second liquefied gas storage tank 10 are connected to the first liquefied gas storage tank 10 in an emergency or otherwise in the second liquefied gas storage tank 10 If you need to supply it, you have to use it.

In addition, the embodiment of the present invention may further include a ninth line L9 connecting the second line L2 and the third line L3.

The ninth line L9 may be branched downstream of the LNG vaporizer 60 of the third line L3 and connected to the downstream of the forced vaporizer 41 of the second line L2. In this case, the LNG vaporizer 60 can have an acceptable pressure when liquefied gas is vaporized, equal to the acceptable pressure of the forced vaporizer 41, and can be approximately 15 to 20 bar.

That is, in the embodiment of the present invention, when the forced vaporizer 41 malfunctions or stops operating, the LNG vaporizer 60 can be used to supply the forced vaporized liquefied gas to the propulsion engine 21.

Specifically, when the forced vaporizer 41 malfunctions or stops operating, the boosting pump 30 pressurizes the liquefied gas stored in the liquefied gas storage tank 10 to 15 to 20 bar to supply the LNG vaporizer 41 through the third line L3, And the liquefied gas forcedly vaporized in the LNG vaporizer 60 is supplied to the downstream side of the forced vaporizer of the second line L2 through the ninth line L9 and then supplied to the propulsion engine 60 through the second line L2. (Not shown).

As described above, the gas processing system 1 according to the embodiment of the present invention is constructed so that the LNG vaporizer 60, which is performed during the gas-up operation, is assisted by the forced vaporizer 41, The safety of the fuel supply can be improved and the reliability can be increased.

The gas processing system 1 according to the embodiment of the present invention includes a technique of configuring the heat insulating portion 101 of the liquefied gas storage tank 10 to suck it into the evaporative gas compressor 50 when the liquefied gas leaks .

The gas processing system 1 according to the embodiment of the present invention as shown in FIG. 4 is provided with a liquefied gas storage tank 10 having a heat insulating portion 101 and an evaporation gas generated from a liquefied gas storage tank 10 A boosting pump 30 for pressurizing the liquefied gas stored in the liquefied gas storage tank 10, a forced vaporizer 41 for supplying the liquefied gas pressurized from the boosting pump 30 and forcibly vaporizing the liquefied gas, , And controls the evaporative gas compressor (50) so that the liquefied gas leaked to the heat insulating portion (101) is sucked into the evaporative gas compressor (50) when the liquefied gas leaks to the heat insulating portion (101) of the liquefied gas storage tank Liquid separator 42 which receives the forcedly vaporized liquefied gas from the forced vaporizer 41 and performs phase separation of the liquefied gas, a control unit 73, a detection sensor 81 for detecting whether the liquefied gas has leaked from the adiabatic unit 101, , A liquefied gas storage tank (10) and a propulsion engine (21) A first line L1 having a compressor 50 and a liquefied gas storage tank 10 and a downstream line of the evaporation gas compressor 50 on the first line L1 and connected to the boosting pump 30, A second line L2 having a gas-liquid separator 42, a tenth line L10 connecting the heat insulating portion 101 of the liquefied gas storage tank 10 and the second line L2, (L11a) and 11b line (L11b) connecting the first line (L2) and the first line (L1). Here, the heat insulating portion 101 may be an IBS (InterBarrier Space) provided in the liquefied gas storage tank 10.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 through the first line L1, An evaporative gas compressor 50 may be provided in the evaporative gas compressor 50 to supply the evaporated gas compressed in the evaporative gas compressor 50 to the propulsion engine 21. A booster pump 30 is connected to the second line L2 via a second line L2 and connected downstream of the evaporative gas compressor 50 on the first line L1 of the liquefied gas storage tank 10, A first heater 41 and a first heater 43 so as to supplement the fuel supplied to the propulsion engine 21 through the first line L1.

In addition, in the embodiment of the present invention, the tenth line L10 connecting the heat insulating portion 101 of the liquefied gas storage tank 10 to the second line L2, the tenth line L10 connecting the heat insulating portion 101 of the liquefied gas storage tank 10 A control unit 73 for judging whether or not the liquefied gas is leaking through the evaporative gas compressor 50 and for detecting the leakage of the liquefied gas through the evaporative gas compressor 50, And the eleventh line L11a branching between the forced vaporizer 41 of the second line L2 and the gas-liquid separator 42 and connecting the upstream of the evaporator gas compressor 50 of the first line L1 .

The control unit 73 forcibly vaporizes the liquefied gas leaked to the heat insulating portion 101 by the forced vaporizer 41 when the liquefied gas leaks to the heat insulating portion 101 and then forcibly liquefies the vaporized liquefied gas to the evaporative gas compressor (50) is sucked. At this time, the control unit 73 can receive the leakage of the liquefied gas from the detection sensor 81 to the thermal insulation unit 101 by wire or wireless.

Specifically, the control unit 73 receives the information indicating that the liquefied gas has leaked to the heat insulating portion 101 from the sensor 81 in a wired or wireless manner, and leaks to the heat insulating portion 101 through the tenth line L10 And the liquefied gas leaking to the heat insulating portion 101 is forcibly vaporized by the forced vaporizer 41 and then the liquefied gas forcedly vaporized through the 11a line L11a is evaporated So that the gas compressor 50 can be controlled to be sucked. At this time, the control unit 73 operates the evaporative gas compressor 50 to apply a negative pressure to the heat insulating portion 101 so that the evaporative gas compressor 50 sucks the leaked liquefied gas into the heat insulating portion 101 Can be controlled.

In the embodiment of the present invention, instead of the 11th line (L11a), the first line (L1) is branched downstream of the gas-liquid separator (42) of the second line (L2) 11b and a line L11b. Of course, the present invention is not limited to this, and both the 11a line L11a and the 11b line L11b may be provided, but for the sake of explanation, only the 11b line L11b will be described.

The control unit 73 forcibly vaporizes the liquefied gas leaked to the heat insulating portion 101 by the forced vaporizer 41 when the liquefied gas leaks to the heat insulating portion 101 and then only the vapor phase separated by the gas- So that the evaporative gas compressor 50 can be controlled to be sucked. The gas-liquid separator 42 can solve the problem that the liquid-phase may be contained in the liquefied gas forcedly vaporized in the forced vaporizer 41 and the driving efficiency of the evaporative gas compressor 50 may be lowered.

Specifically, the control unit 73 receives the information indicating that the liquefied gas has leaked to the heat insulating portion 101 from the sensor 81 in a wired or wireless manner, and leaks to the heat insulating portion 101 through the tenth line L10 Liquid separator 42 is supplied to the gas-liquid separator 42. The gas-liquid separator 42 supplies the gas-liquid separator 42 with the liquefied gas, which has been forcedly vaporized by the forced vaporizer 41, (42) to be separated into a gas phase and a liquid phase.

Thereafter, the control unit 73 controls the evaporation gas compressor 50 to suck the gas phase separated by the gas-liquid separator 42 through the eleventh line L11b, and supplies the liquid phase separated by the gas-liquid separator 42 to the liquefied gas storage It is possible to control to return to the tank 10. At this time, the control unit 73 operates the evaporative gas compressor 50 to apply a negative pressure to the heat insulating portion 101 so that the evaporative gas compressor 50 sucks the leaked liquefied gas into the heat insulating portion 101 Can be controlled.

As described above, in the embodiment of the present invention, when the leakage of the liquefied gas to the heat insulating portion 101 of the liquefied gas storage tank 10 is controlled to be sucked into the evaporative gas compressor 50, the safety of the liquefied gas storage tank 10 And the system construction cost can be reduced.

The gas treatment system 1 according to the embodiment of the present invention effectively liquefies the evaporation gas generated in the liquefied gas storage tank 10 by using the evaporation gas heat exchanger 521 and the additional evaporation gas compressor 52 And at the same time, the use of the evaporation gas can be efficiently carried out.

2, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, an evaporative gas compressor 50, An additional evaporative gas compressor 52 that further compresses the compressed evaporated gas in the liquefied gas storage tank 10, an evaporated gas or a gas-liquid separator 522 that is further compressed by the additional evaporative gas compressor 52, A gas-liquid separator 522 for separating the evaporated gas heat-exchanged in the evaporation-gas heat exchanger 521 into a gas phase and a liquid phase, a vapor-phase gas-liquid separator 522 for separating the vapor- An expansion valve 523 for decompressing or expanding the evaporated gas heat exchanged in the heat exchanger 522, a first line (not shown) having the evaporative gas compressor 50 connecting the liquefied gas storage tank 10 and the propulsion engine 21, L1), the first line (L1) A twelfth line L12 which is branched downstream of the gas compressor 50 and is connected to the gas-liquid separator 522 and has an additional evaporative gas compressor 52, an evaporative gas heat exchanger 521, an expansion valve 523, And a thirteenth line L13 connecting the separator 522 and the evaporation gas heat exchanger 521 as main components.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 through the first line L1, An evaporative gas compressor 50 may be provided in the evaporative gas compressor 50 to supply the evaporated gas compressed in the evaporative gas compressor 50 to the propulsion engine 21. Here, the evaporative gas compressor (50) can be designed to have a capacity capable of treating all naturally occurring evaporative gases generated in the liquefied gas storage tank (10) at the maximum processing capacity.

In addition, in the embodiment of the present invention, the gas-liquid separator 522 is connected downstream of the evaporative gas compressor 50 on the first line L1 via the twelfth line L12, and the gas-liquid separator 522 is further connected on the twelfth line L12 At least a part of the evaporative gas compressed in the evaporative gas compressor 50 is compressed by the additional evaporative gas compressor 52 and is then evaporated by the evaporative gas compressor 52, the evaporative gas heat exchanger 521 and the expansion valve 523, Gas heat exchanger 521 to be re-liquefied.

In the embodiment of the present invention, the propulsion engine 21 requires a pressure of 15 to 20 bar with a low-speed two-stroke low-pressure gas injection engine. Therefore, the evaporative gas compressor 50 is also compressed to 15 to 20 bar.

Therefore, the evaporation gas heat exchanger 521 can supply the evaporation gas, which has not been supplied to the propulsion engine 21 among the evaporation gases compressed in the evaporation gas compressor 50, to the evaporation gas The pressure of the compressed evaporated gas is only 15 to 20 bar, so that there is a problem that re-liquidization of the evaporated gas is not performed.

Therefore, in the embodiment of the present invention, since the additional evaporated gas compressor 52 is provided upstream of the evaporated gas heat exchanger 521, the evaporated gas heat exchanger 521 supplies the additional compressed evaporated gas to the evaporated gas heat exchanger 521, There is an effect that realization of the redemption of

The additional evaporative gas compressor 52 may comprise, for example, two to three stages, and may further compress the evaporated gas compressed at 15 to 20 bar in the evaporative gas compressor 50 to 100 to 150 or 200 to 400 bar .

Here, the evaporation gas heat exchanger 521 is supplied with the evaporation gas generated from the liquefied gas storage tank 10 through the first line L1, and the evaporation gas further compressed by the additional evaporation gas compressor 52 The gas phase separated from the gas-liquid separator 522 can be supplied through the thirteenth line L13. The evaporation gas heat exchanger 521 is connected to at least two of the evaporation gas supplied from the liquefied gas storage tank 10, the evaporation gas further compressed by the additional evaporation gas compressor 52 or the vapor separated from the gas-liquid separator 522 More than two can mutually exchange heat.

Preferably, the evaporation gas heat exchanger 521 performs a first heat exchange with the evaporation gas supplied from the liquefied gas storage tank 10 by the additional evaporation gas compressor 52, and thereafter, in the gas-liquid separator 522 And can perform secondary heat exchange with the separated gas phase. This has the effect of greatly improving the re-liquefaction rate of the additional compressed evaporated gas.

At this time, the evaporated gas that has been heat-exchanged and re-liquefied in the evaporation gas heat exchanger 521 is supplied to the gas-liquid separator 522 under a reduced pressure of 1 to 7 bar by the expansion valve 523, Can be separated into liquid phase. Here, the gas phase is supplied to the evaporation gas heat exchanger 521 to further increase the re-liquefaction efficiency by additionally supplying cold heat to the additional compressed evaporated gas, and the liquid phase can be returned to the liquefied gas storage tank 10.

The gas treatment system 1 according to an embodiment of the present invention additionally has six embodiments through the arrangement change of the main constitutions described above in order to effectively re-liquefy the vapor gas and perform the use of the vapor gas more efficiently Which will be described below.

The gas processing system 1 according to the embodiment of the present invention is configured such that vapor phase separated in the gas-liquid separator 522 is evaporated on the first line L1 via the evaporation gas heat exchanger 521, Gas heat exchanger (521).

To this end, the gas processing system 1 according to the embodiment of the present invention connects the gas-liquid separator 522, the evaporation gas heat exchanger 521 on the first line L1 and the evaporation gas compressor 50, And a fourteenth line (L14) via the heat exchanger (521).

Liquid separator 522 is mixed with the evaporated gas supplied from the liquefied gas storage tank 10 to the evaporated gas compressor 50 so that the internal pressure of the liquefied gas storage tank 10 due to the evaporated gas It is possible to minimize the rise or the external emission of the evaporated gas.

The gas processing system 1 according to the second embodiment of the present invention includes the booster pump 30 for pressurizing the liquefied gas stored in the liquefied gas storage tank 10 in addition to the first embodiment, A boosting pump 30 connected to the liquefied gas storage tank 10 and the evaporation gas compressor 50 on the first line L1 to supply the liquefied gas to the evaporator 40, A forced gasifier 41, and a gas-liquid separator 42. The gas-liquid separator 42 may be a gas-

Thus, in the second embodiment, the second line L2 including the boosting pump 30, the forced vaporizer 41, and the gas-liquid separator 42 is connected downstream of the evaporative gas compressor 50 in addition to the first embodiment , The load of the evaporative gas compressor (50) is reduced.

In the third embodiment, in addition to the first embodiment, the gas processing system 1 according to the embodiment of the present invention includes a boosting pump 30 for pressurizing the liquefied gas stored in the liquefied gas storage tank 10, A forced vaporizer 41 for supplying a pressurized liquefied gas from the pressurized liquefied gas supply line 30 and forcing the liquefied gas from the liquefied gas storage tank 10 and the evaporation gas compressor 50 on the first line L1, , A forced vaporizer (41), and a gas-liquid separator (42). The evaporative gas compressor 50 of the third embodiment differs from the evaporative gas compressor 50 described above in that the capacity capable of treating all the evaporative gas amount required by the propulsion engine 21 when the ship has the maximum line speed is the maximum Processing capacity.

Thus, in the third embodiment, the 16th line L16 including the booster pump 30, the forced vaporizer 41, and the gas-liquid separator 42 is connected upstream of the evaporative gas compressor 50 in addition to the first embodiment , The evaporation gas can be additionally supplied to the forced vaporizer 41 in accordance with the change in the load of the low-speed two-stroke low-pressure gas injection engine, which is the propulsion engine 21, so that it is possible to flexibly respond to the required pressure of the propulsion engine 21 There is an effect that can be controlled.

The gas processing system 1 according to the fourth embodiment of the present invention is a system in which the gas phase separated in the gas-liquid separator 522 is supplied to the additional evaporation gas L12 on the twelfth line L12 via the evaporation gas heat exchanger 521 Can be supplied upstream of the compressor (52).

To this end, the gas processing system 1 according to the embodiment of the present invention connects the gas-liquid separator 522 and the additional evaporative gas compressor 52 on the twelfth line L12 and connects the evaporation gas heat exchanger 521 And a fifteenth line (L15) through which the signal is transmitted.

The gas phase separated by the gas-liquid separator 522 is mixed with the compressed evaporative gas supplied upstream of the additional evaporative gas compressor 52, thereby reducing the load of the evaporative gas compressor 50 and minimizing its size .

The gas processing system 1 according to the embodiment of the present invention according to the fifth embodiment is similar to the gas processing system 1 according to the fourth embodiment except that the boosting pump 30 for pressurizing the liquefied gas stored in the liquefied gas storage tank 10, A boosting pump 30 connected to the liquefied gas storage tank 10 and the evaporation gas compressor 50 on the first line L1 to supply the liquefied gas to the evaporator 40, A forced gasifier 41, and a gas-liquid separator 42. The gas-liquid separator 42 may be a gas-

Thus, in the fifth embodiment, by connecting the second line L2 including the booster pump 30, the forced vaporizer 41, and the gas-liquid separator 42 to the downstream of the evaporative gas compressor 50 in addition to the fourth embodiment , The load of the evaporative gas compressor (50) is reduced.

In the sixth embodiment, in addition to the fourth embodiment, the gas processing system 1 according to the embodiment of the present invention further includes a boosting pump 30 for pressurizing the liquefied gas stored in the liquefied gas storage tank 10, A forced vaporizer 41 for supplying a pressurized liquefied gas from the pressurized liquefied gas supply line 30 and forcing the liquefied gas from the liquefied gas storage tank 10 and the evaporation gas compressor 50 on the first line L1, , A forced vaporizer (41), and a gas-liquid separator (42). The evaporative gas compressor 50 in the sixth embodiment is different from the evaporative gas compressor 50 described above in that the capacity capable of treating all of the evaporative gas amount required by the propulsion engine 21 when the ship has the maximum line speed is the maximum Processing capacity.

Thus, in the sixth embodiment, the 16th line L16 including the booster pump 30, the forced vaporizer 41, and the gas-liquid separator 42 is connected upstream of the evaporative gas compressor 50 in addition to the fourth embodiment , The evaporation gas can be additionally supplied to the forced vaporizer 41 in accordance with the change in the load of the low-speed two-stroke low-pressure gas injection engine, which is the propulsion engine 21, so that it is possible to flexibly respond to the required pressure of the propulsion engine 21 There is an effect that can be controlled.

The gas processing system 1 according to the embodiment of the present invention includes the evaporation gas compressor for compressing the evaporation gas to be supplied to the propulsion engine 21 as a plurality of evaporation gas compressors driven by separate driving sources, Lt; RTI ID = 0.0 > a < / RTI >

6, the gas processing system 1 according to the embodiment of the present invention includes a first evaporative gas compressor 54 for compressing the evaporative gas generated in the liquefied gas storage tank 10, A buffer tank 90 provided between the first evaporative gas compressor 54 and the second evaporative gas compressor 55, a buffer tank 90 connected between the liquefied gas storage tank 10 and the propulsion engine 21, A first line L1 having a first evaporative gas compressor 54 and a second evaporative gas compressor 54 and a buffer tank 90 and a first evaporative gas compressor 54 and a second evaporative gas compressor 55 on a first line L1, And a 18th line L18 branched from the power generation engine 22 and connected to the power generation engine 22 and having a buffer tank 90 as main components.

The gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the first line L1 and the first line L1, And second evaporative gas compressors 54 and 55 to supply the evaporated gas compressed in the first and second evaporative gas compressors 54 and 55 to the propulsion engine 21.

At this time, the first and second evaporative gas compressors 54 and 55 are driven through different independent driving sources so as to be able to back up each other. That is, the first evaporative gas compressor 54 and the second evaporative gas compressor 55 have different driving sources.

This will be described in detail below.

The first evaporative gas compressor 54 can be compressed to about 5 to 10 bar with a centrifugal compressor and can be disposed upstream of the buffer tank 90 provided on the first line L1. At this time, the first evaporative gas compressor 54 may be a cryogenic compressor. The buffer tank 90 may be a separate storage medium, but a separate space may be provided on the first line L1, for example, the arbitrary portion may be enlarged in the first line L1.

The first evaporative gas compressor 54 may be composed of a first evaporative gas compressor 541 and a first evaporative gas compressor 542, which are respectively formed in parallel. At this time, the first-stage evaporative gas compressor 541 and the first-stage evaporative gas compressor 542 are also driven by different driving sources and can back up each other.

For example, if the first 1a evaporative gas compressor 541 is the main compressor, the 1b evaporative gas compressor 542 may be the auxiliary compressor, and the first 1a evaporative gas compressor 541 may malfunction or become inoperable, The gas compressor 542 may be activated to back up the first evaporative gas compressor 541 and if the first evaporative gas compressor 541 can not compress all of the specified amount of evaporative gas, 541 and the 1b evaporative gas compressor 542 may be driven together and the 1b evaporative gas compressor 542 may assist the 1 st evaporative gas compressor 541.

The second evaporative gas compressor 55 can further compress the evaporated gas compressed by the first evaporative gas compressor 54 at about 15 to 20 bar with the reciprocating compressor, May be disposed downstream of the tank (90). At this time, the second evaporative gas compressor (55) does not separately form auxiliary compressor, unlike the first evaporative gas compressor (54). At this time, the second evaporative gas compressor 55 may be a room temperature compressor.

The control unit 74 controls the driving of the first, the first and the second evaporative gas compressors 541, 542, 55 by grasping the driving state of the first, the first and the second evaporative gas compressors 541, 18 line (L18) of the liquefied gas and / or the evaporation gas. At this time, the flow control of the liquefied gas and / or the evaporating gas flowing on the 18th line (L18) can be controlled by a separate valve (not shown).

Specifically, the control unit 74 can activate the first b evaporative gas compressor 542 when auxiliary or back-up of the first evaporative gas compressor 541 is required, and the auxiliary or backup need of the second evaporative gas compressor 55 For example, only the first evaporative gas compressor 541 may be operated to supply the evaporative gas to the power generation engine 22 through the 18th line L18.

The control unit 74 temporarily stores the evaporated gas compressed by the first evaporative gas compressor 54 in the buffer tank 90 when the second evaporative gas compressor 55 is assisted or backed up, And can supply the evaporative gas to the power generation engine 22.

In addition, embodiments of the present invention also include first and second additional evaporative gas compressors 56,57 for further compressing the evaporated gas compressed by the first and / or second evaporative gas compressors 54,55, At least one of the evaporation gas generated in the gas storage tank 10, the evaporation gas further compressed by the first and second additional evaporative gas compressors 56 and 57 or the vapor phase separated from the gas-liquid separator 522 A gas-liquid separator 522 for separating the evaporated gas heat-exchanged in the evaporation gas heat exchanger 521 into a gas phase and a liquid phase, and an evaporated gas heat exchanged in the evaporation gas heat exchanger 522. The evaporated gas heat exchanger 521, An expansion valve 523 for decompressing or expanding the refrigerant is branched downstream of the second evaporative gas compressor 55 on the first line L1 and connected to the gas-liquid separator 522 and connected to the first and second additional evaporative gas compressors 56,57 ), The evaporation gas heat exchanger 521, the 19th line L19 including the expansion valve 523, , And a twentieth line (L20) bypassing the second additional evaporative gas compressor (57).

Here, the evaporating gas heat exchanger 521 can heat-exchange only the evaporated gas generated in the liquefied gas storage tank 10 and the additional compressed evaporated gas by the first and second additional evaporative gas compressors 56 and 57 And is not limited thereto.

At this time, the control unit 74 controls the driving of the first and second additional evaporative gas compressors 56 and 57 by grasping the driving state of the first and second evaporative gas compressors 54 and 55, The re-liquefaction of the evaporated gas through the evaporated gas heat exchanger 521 can be reliably implemented by controlling the flow of the liquefied gas and / or the evaporated gas flowing on the evaporator L20. At this time, the flow control of the liquefied gas and / or the evaporating gas flowing on the twentieth line L20 may be controlled by a separately provided valve (not shown).

Specifically, the control unit 74 bypasses the second additional evaporative gas compressor 57 in the normal operation of the first or second evaporative gas compressors 54 and 55 through the twentieth line L20 To be fed directly to the first additional evaporative gas compressor 56 and to activate the second additional evaporative gas compressor 57 when auxiliary or backup of the first or second evaporative gas compressor 54,55 is required.

At this time, the second additional evaporative gas compressor 57 is designed to have the same capacity as that of the first or second evaporative gas compressors 54 and 55, so that the first or second evaporative gas compressors 54 and 55, The first or second evaporative gas compressor 54 or 55 compresses the evaporative gas as much as the first or second evaporative gas compressor 54 or 55 compresses the first or second evaporative gas compressor 56 or the second evaporative gas compressor 56, The re-circulation of the evaporated gas can be continuously realized in the evaporative gas heat exchanger 521 even if a malfunction or an operation stop of the evaporator 54 or 55 occurs.

For example, when the second additional evaporative gas compressor 57 is designed to be equal in capacity to that of the second evaporative gas compressor 55, the control unit 74 controls the normal operation of the second evaporative gas compressor 55 The evaporated gas compressed by the second evaporative gas compressor 55 bypasses the second additional evaporative gas compressor 57 through the twentieth line L20 to be supplied to the first additional evaporative gas compressor 56 The second evaporative gas compressor 55 can compress and supply the evaporative gas to the first additional evaporative gas compressor 56 as the second evaporative gas compressor 55 compresses it if the second evaporative gas compressor 55 malfunctions or stops operating.

In the embodiment of the present invention, the first pressure sensor 82 and the first line L1, which measure the pressure of the evaporating gas flowing downstream of the first additional evaporative gas compressor 56 on the nineteenth line L19, And a second pressure sensor 83 for measuring the pressure of the evaporating gas flowing upstream of the propulsion engine 21 on the engine. At this time, the pressure of the evaporating gas flowing upstream of the propulsion engine 21 on the first line L1 is equal to the pressure upstream of the second additional evaporating gas compressor 57 on the nineteenth line L19.

At this time, the control unit 74 outputs the pressure information of the evaporating gas flowing from the first pressure sensor 82 to the downstream side of the first additional evaporative gas compressor 56 on the nineteenth line L19 or from the second pressure sensor 83 The pressure state of the evaporating gas flowing downstream of the first additional evaporative gas compressor 56 on the nineteenth line L19 in response to the pressure information of the evaporating gas flowing upstream of the propulsion engine 21 on the first line L1, Control of the driving of the second evaporative gas compressor 55 and the first and second additional evaporative gas compressors 56 and 57 in accordance with the pressure state of the evaporative gas flowing upstream of the propulsion engine 21 on the first line L1 It is possible to flexibly respond to the state of the propulsion engine 21 and reliably realize the re-liquefaction of the evaporated gas through the evaporated gas heat exchanger 521. [

Specifically, the control unit 74 receives the pressure information of the evaporating gas flowing downstream of the first additional evaporative gas compressor 56 on the nineteenth line L19 from the first pressure sensor 82 in a wired or wireless form And the pressure of the evaporating gas flowing downstream of the first additional evaporative gas compressor 56 on the nineteenth line L19 is increased above the predetermined pressure, the pressure in the first or second additional evaporative gas compressor 56, When any one of the evaporation gas compressors controls the evaporation gas to be uncompressed and the pressure of the evaporating gas flowing downstream of the first additional evaporative gas compressor 56 on the nineteenth line L19 is reduced to less than the predetermined pressure, 1 and the second additional evaporative gas compressor (56, 57) both compress the evaporative gas.

The control unit 74 receives the pressure information of the evaporation gas flowing upstream of the propulsion engine 21 on the first line L1 from the second pressure sensor 83 in the form of wire or wireless, When the pressure of the evaporating gas flowing upstream of the propulsion engine 21 on the first evaporator L1 is higher than the preset pressure, the evaporating gas compressor of either the first or second evaporating gas compressor 54, And if the pressure of the evaporating gas flowing upstream of the propulsion engine 21 on the first line L1 is lower than the predetermined pressure, both of the first and second evaporative gas compressors 54, Thereby controlling the evaporation gas to be compressed.

In addition, in the embodiment of the present invention, the control unit 74 can control the driving of the first and second additional evaporative gas compressors 56 and 57 depending on whether the evaporative gas heat exchanger 521 is in operation.

Specifically, when the evaporation gas heat exchanger 521 is operated, the control unit 74 controls both the first and second evaporative gas compressors 54 and 55 to compress the evaporative gas, and the evaporative gas heat exchanger 521 The evaporative gas compressor of either the first or second evaporative gas compressors 54 and 55 can control the evaporative gas to be uncompressed.

Here, the non-compression control means that the evaporative gas compressor is driven by a piston (not shown), but an intake valve (not shown) and an exhaust valve (not shown) are both opened so that substantially no compression occurs.

Also, in the embodiment of the present invention, the first and second bypasses for bypassing the evaporated gas compressed by the second evaporative gas compressor 55 and the first additional evaporative gas compressor 56 to the front end of the respective compressors, And may further include lines BL1 and BL2. Here, a control valve (not shown) is provided on each of the first and second bypass lines BL1 and BL2 to control the flow rate of the first and second bypass lines BL1 and BL2 , And a third bypass line (BL3) connected in parallel to the second bypass line (BL2). A block valve (not shown) may be provided on the third bypass line BL3.

At this time, the control unit 74 outputs the pressure information of the evaporating gas flowing from the first pressure sensor 82 to the downstream side of the first additional evaporative gas compressor 56 on the nineteenth line L19 or from the second pressure sensor 83 The pressure state of the evaporating gas flowing downstream of the first additional evaporative gas compressor 56 on the nineteenth line L19 in response to the pressure information of the evaporating gas flowing upstream of the propulsion engine 21 on the first line L1, By controlling the flow of the evaporating gas flowing on the first and second bypass lines BL1 and BL2 in accordance with the pressure state of the evaporating gas flowing upstream of the propulsion engine 21 on the first line L1, It is possible to flexibly respond to the state of the evaporator 21 and reliably realize the re-liquefaction of the evaporative gas through the evaporative gas heat exchanger 521. [

Specifically, the control unit 74 receives the pressure information of the evaporating gas flowing downstream of the first additional evaporative gas compressor 56 on the nineteenth line L19 from the first pressure sensor 82 in a wired or wireless form , And if the pressure of the evaporating gas flowing downstream of the first additional evaporative gas compressor (56) on line 19 (L19) is greater than the predetermined pressure, the additional compressed evaporated gas compressor (56) Gas is bypassed from the rear end of the first additional evaporative gas compressor 56 to the front end via the second bypass line BL2 and the gas is bypassed to the downstream side of the first additional evaporative gas compressor 56 on the nineteenth line L19 When the pressure of the flowing evaporating gas is lower than the preset pressure, it is possible to control the evaporating gas heat exchanger 521 to be supplied with the additional compressed evaporated gas by the first additional evaporative gas compressor 56.

The control unit 74 receives the pressure information of the evaporation gas flowing upstream of the propulsion engine 21 on the first line L1 from the second pressure sensor 83 in the form of wire or wireless, The evaporated gas compressed by the second evaporative gas compressor 55 is supplied to the first bypass line BL1 when the pressure of the evaporative gas flowing upstream of the propulsion engine 21 on the first bypass line L1 increases beyond the preset pressure When the pressure of the evaporating gas flowing upstream of the propulsion engine 21 on the first line L1 is lower than the preset pressure, 2 evaporative gas compressor 55 is supplied to the propulsion engine 21 or the first additional evaporative gas compressor 56.

In the embodiment of the present invention, the control unit 74 controls the flow of the evaporative gas flowing on the first and second bypass lines BL1 and BL2 in accordance with the operation of the evaporative gas heat exchanger 521 .

Specifically, when the evaporation gas heat exchanger 521 is operated, the control unit 74 controls the evaporation gas heat exchanger 521 so that the evaporation gas further compressed by the first additional evaporative gas compressor 56 is supplied to the evaporation gas heat exchanger 521 When the evaporation gas heat exchanger 521 is shut down, the evaporation gas further compressed by the first additional evaporative gas compressor 56 is supplied to the first additional evaporative gas compressor 56 through the second bypass line BL2, So as to be bypassed from the rear end to the front end.

The gas processing system 1 according to the embodiment of the present invention minimizes the operation of the evaporation gas heat exchanger 521 and controls the operation of the propulsion engine 21 and the evaporation gas heat exchanger 521 through the control of the controller 74, It is possible to individually control the driving of the evaporation gas, and the evaporation gas can be processed very efficiently.

The gas processing system 1 according to the embodiment of the present invention controls at least a part of the compression stage of the evaporative gas compressor 50 to decompress the evaporation gas in accordance with whether the power generation engine 22 is operated, And a technique of supplying the evaporative gas to the power generation engine 22 without using a decompression means.

2, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, A control unit 75 for controlling a plurality of compression stages of the evaporative gas compressor 50 depending on whether the evaporative gas compressor 50 is operated or not, The main line L1 and the seventh line L7 branching off from the evaporative gas compressor 50 on the first line L1 and connected to the power generation engine 22 may be included.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 through the first line L1, An evaporative gas compressor 50 may be provided in the evaporative gas compressor 50 to supply the evaporated gas compressed in the evaporative gas compressor 50 to the propulsion engine 21.

The gas processing system 1 according to the embodiment of the present invention can supply the evaporation gas compressed in the evaporation gas compressor 50 through the seventh line L7 to the power generation engine 22 without additional decompression means have.

In addition, in the embodiment of the present invention, the control unit 75 for controlling the fuel inflow pressure of the power generation engine 22 by determining whether the power generation engine 22 is operating and controlling the plurality of compression stages of the evaporation gas compressor 50 ).

The control unit 75 can control so that at least some of the compression stages of the evaporative gas compressor 50 are not compressing the evaporation gas depending on whether the power generation engine 22 is operating or not.

Specifically, when the power generation engine 22 is operated and the propulsion engine 21 is not operated, the control unit 75 controls the plurality of compression stages of the evaporative gas compressor 50 in accordance with the fuel demand pressure of the power generation engine 22, So that the evaporation gas is supplied to the power generation engine 22 through the seventh line L7 without any additional decompression means, and the power generation engine 22 is operated without being operated In the case where only the engine 21 is operated, the plurality of compression stages of the evaporation gas compressor 50 are controlled to compress the evaporation gas in accordance with the fuel demand pressure of the propulsion engine 21 so that the evaporation gas is supplied to the propulsion engine 21 Can be controlled.

As described above, according to the embodiment of the present invention, the pressure of the evaporation gas can be regulated to the pressure required by the power generation engine 22 without additional decompression means through the control unit 75 so that it can be supplied to the power generation engine 22, It is possible to reduce the construction cost and to provide a flexible fuel supply.

The gas processing system 1 according to the embodiment of the present invention is provided with a liquefied gas storage tank 10 (not shown) for loading or unloading the 21st line L21, which is an overpressure prevention line for preventing overpressure at the downstream end of the evaporative gas compressor 50, ) On the fourth line (L4) for processing the evaporated gas generated in the second line (L4), so that the overpressure prevention line can be stably constructed.

8, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, a liquefied gas A second heater 511 for heating the evaporated gas compressed by the H / D compressor 51, a liquefied gas storage tank 10, and an evaporator 50. The H / D compressor 51 compresses the evaporation gas generated in the storage tank 10, The first line L1 having the evaporative gas compressor 50 and the evaporated gas generated in the liquefied gas storage tank 10 are connected to the liquefied gas storage tank 10 again A fourth line L4 connected to the H / D compressor 51, a second heater 511 branched on the fourth line L4 downstream of the evaporative gas compressor 50 on the first line L1, And a twenty-first line L21 connected to the rear end.

Specifically, the gas processing system 1 according to the embodiment of the present invention connects the liquefied gas storage tank 10 and the propulsion engine 21 via the first line L1, And an evaporative gas compressor (50). In the embodiment of the present invention, the evaporation gas generated in the liquefied gas storage tank 10 through the fourth line L4 is connected again to the liquefied gas storage tank 10, and the fourth line L4 The H / D compressor 51 may be provided.

In addition, in the embodiment of the present invention, the twenty-first line L21 branching at the downstream of the evaporation gas compressor 50 on the first line L1 and connected to the rear end of the second heater 511 on the fourth line L4 . That is, the twenty-first line L21 may be formed to share at least a part of the fourth line L4 for processing the evaporated gas generated in the liquefied gas storage tank 10 at the time of loading or unloading.

When an overpressure is formed downstream of the evaporative gas compressor, an overpressure prevention line for preventing overpressure is separately provided and connected to the liquefied gas storage tank. However, since the evaporated gas compressed by the evaporative gas compressor is much larger than the internal pressure of the liquefied gas storage tank, the liquefied gas storage tank may be broken due to overpressure when returning to the liquefied gas storage tank, And the pressure is reduced on the prevention line. Thus, conventionally, there is a problem that the over-pressure preventing line is very expensive to construct.

Therefore, in the embodiment of the present invention, the overpressure prevention line is connected so as to at least partially share on the unused fourth line L4 other than when loading or unloading as in the twenty-first line L21, Thereby improving system safety.

Specifically, in the embodiment of the present invention, when the pressure set by the second pressure sensor 83 is larger than the predetermined pressure set downstream of the evaporative gas compressor 50, the evaporated gas compressed by the evaporative gas compressor 50 And is supplied to the liquefied gas storage tank 10 through the twenty-first line L21, which is controlled by a separate control unit (not shown) and a valve (not shown) driven by the control unit, Or by other devices (not shown).

The gas processing system 1 according to the embodiment of the present invention is a system in which the evaporation gas compressed at a high pressure by the evaporation gas compressor 50 is supplied directly to the evaporation gas heat exchanger 521 and the propulsion engine 21 and the power generation engine 22 may be branched at the intermediate stage of the evaporative gas compressor 50. [

5, the gas processing system 1 according to the embodiment of the present invention includes an evaporative gas compressor 50 for compressing the evaporative gas generated in the liquefied gas storage tank 10, a liquefied gas storage tank 10, An evaporation gas heat exchanger 521 for exchanging heat between at least one of the evaporation gas generated in the evaporator 521, the evaporation gas compressed in the evaporation gas compressor 50, or the vapor in the vapor phase separated from the gas-liquid separator 522, Liquid separator 522 for separating the evaporated gas heat exchanged in the evaporator 521 into a gas phase and a liquid phase, an expansion valve 523 for reducing or expanding the evaporated gas heat-exchanged in the evaporation gas heat exchanger 522, a liquefied gas storage tank The twenty-second line L22 connected to the liquefied gas storage tank 10 again from the evaporation gas compressor 50, the evaporation gas heat exchanger 521, the gas-liquid separator 522 and the expansion valve 523, And the evaporation gas compressor (50) on the 22nd line (L22) Branching between the stage and the fourth compression stage and branched from the evaporation gas compressor (50) on the twenty-third line (L23) and the twenty second line (L22) connected to the propulsion engine (21) And the fourth compression stage is branched from the evaporation gas compressor 50 on the twenty-fourth line L24 and the twenty-second line L22 connected to the engine 22 and connected to the third compression stage and the fourth compression stage, And a line L25 as a main configuration. Here, the evaporation gas heat exchanger 521 may heat-exchange only the evaporation gas generated in the liquefied gas storage tank 10 and the evaporation gas compressed by the evaporation gas compressor 50, but the present invention is not limited thereto.

At this time, the evaporation gas compressor (50) forms the first to fifth compression stages from the upstream side to the downstream side based on the flow of the evaporation gas, and the final discharge pressure is 100 to 150 bar or 200 to 400 bar . ≪ / RTI >

For example, 1 to 3 bar for the first compression stage of the evaporative gas compressor 50, 5 to 10 bar for the second compression stage 15 to 20 bar for the third compression stage 50 to 100 bar for the fourth compression stage 100 To 150 bar.

Specifically, the gas processing system 1 according to the embodiment of the present invention is connected to the liquefied gas storage tank 10 again from the liquefied gas storage tank 10 through the 22nd line L22, and the 22nd line L22 An evaporation gas heat exchanger 521, a gas-liquid separator 522, and an expansion valve 523 are provided on the evaporation gas compressor 50, the evaporation gas compressor 50, the evaporation gas heat exchanger 521, That is, the evaporative gas generated in the liquefied gas storage tank 10 is supplied to the evaporative gas compressor 50 through the twenty second line L22, and the evaporative gas compressor 50 is supplied to the evaporative gas compressor 50 in the liquefied gas storage tank 10 So that the evaporation gas is pressurized to a high pressure and fed to the evaporation gas heat exchanger 521 to re-evaporate the evaporation gas in the evaporation gas heat exchanger 521. At this time, the re-liquefied evaporated gas is separated into a gas phase and a liquid phase in the gas-liquid separator 522, the liquid phase is returned to the liquefied gas storage tank 10, .

Further, in the embodiment of the present invention, the evaporation gas branched at the middle end of the evaporative gas compressor 50 is supplied to the propulsion engine 21 via the twenty-third line L23, and through the twenty-fourth line L24 So that the evaporated gas branched at the middle end of the evaporative gas compressor 50 can be supplied to the power generation engine 22.

At this time, the twenty-third line L23 is branched between the third compression stage and the fourth compression stage of the evaporative gas compressor 50 and connected to the propulsion engine 21, thereby discharging the third compression stage of the evaporative gas compressor 50 And the twenty-fourth line L24 is branched from the second compression stage and the third compression stage of the evaporative gas compressor 50 and supplied to the power generation engine 22 So that evaporative gas of 5 to 10 bar discharged from the second compression stage of the evaporative gas compressor 50 can be supplied to the power generation engine 22.

In addition, in the embodiment of the present invention, the evaporated gas discharged from the final stage of the evaporative gas compressor 50 through the twenty-fifth line L25 can be returned to the middle stage of the evaporative gas compressor 50.

The twenty-fifth line L25 is branched at the final stage of the evaporative gas compressor 50 and connected between the third and fourth compression stages of the evaporative gas compressor 50, Or between 200 and 400 bar, between the third and the fourth compression stages of the evaporative gas compressor 50,

Specifically, the twenty-fifth line L25 is branched so as to be branched at the final stage of the evaporative gas compressor 50 and connected upstream of the twenty-fourth line L24 of the third compression stage and the fourth compression stage of the evaporative gas compressor 50 When the amount of fuel required by the propulsion engine 21 is equal to or greater than the predetermined flow rate, the evaporation gas discharged from the final stage of the evaporative gas compressor 50 may be supplied to the 24th line L24.

Accordingly, the gas processing system 1 according to the embodiment of the present invention can supply the evaporation gas of the appropriate pressure to the propulsion engine 21 or the power generation engine 22, and at the same time, the evaporation gas heat exchanger 521), the system construction cost can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: Gas treatment system 10: Liquefied gas storage tank
101: heat insulating part 11: gas-liquid separator
21: Propulsion engine 22: Power generation engine
23: Gas combustion device 30: Boosting pump
41: forced vaporizer 411: first control valve
412: second control valve 413: third control valve
414: fourth control valve 415: fifth control valve
416: sixth control valve 417: seventh control valve
42: gas-liquid separator 43: first heater
50: Evaporative gas compressor 501: Flow control device (IGV)
502: valve 51: H / D compressor
511: second heater 52: additional evaporative gas compressor
521: Evaporative gas heat exchanger 522: Gas-liquid separator
523: expansion valve 530: re-liquefying device
531: gas-liquid separator 54: first evaporative gas compressor
55: second evaporative gas compressor 60: LNG vaporizer
71: control unit 72:
73: control unit 81: detection sensor
82: first pressure sensor 83: second pressure sensor
90: Buffer tank
L1 to L25: first to twenty-fifth lines
CL1 to CL6: First to sixth flow rate adjusting lines
BL1 to BL3: First to third bypass lines

Claims (6)

A first demand source supply line connecting the liquefied gas storage tank and the propulsion demand site;
And a control unit that is provided on the first demand line and which is smaller than a capacity capable of handling all of the evaporative gas required by the propelling demand customer at the time of maximum operation of the propulsive demand customer, An evaporative gas compressor having a maximum capacity for treating all the naturally occurring evaporative gases and having a plurality of compression stages for compressing the evaporative gas generated from the liquefied gas storage tank and supplying the evaporative gas to the propellant;
A second demand source supply line branching at the downstream of the evaporative gas compressor on the first demand source supply line and connecting a demand for electricity generation consuming a pressure lower than a consumption pressure of the propulsion demanding party;
A liquefied gas supply line connecting the liquefied gas storage tank and a downstream end of the final stage of the evaporative gas compressor on the first demand source supply line;
A forced vaporizer provided on the liquefied gas supply line and forcibly vaporizing the liquefied gas stored in the liquefied gas storage tank to generate forcibly generated evaporative gas; And
And a control unit for controlling at least a part of the plurality of compression stages of the evaporative gas compressor so as to make the evaporative gas uncompressed depending on whether the power generation consumer is operated or not,
Wherein,
Controls the flow of the evaporative gas or the liquefied gas on the first demand source supply line or the liquefied gas supply line by comparing the speed of the ship generated using the power of the propulsion demanding party with the predetermined speed of the ship,
The forced vaporizer may comprise:
And generating a forcible evaporative gas as much as the deficit gas, excluding the amount of the evaporative gas compressed by the evaporative gas compressor, from the amount of the evaporative gas needed by the propelling demanding customer in the above-mentioned bidding state, Gas processing system. The apparatus of claim 1,
And controlling only the last compression stage among the plurality of compression stages of the evaporation gas compressor to uncompress the evaporation gas in accordance with the supply pressure of the power generation demanding customer, And supplies the compressed evaporated gas from the compressor to the demand customer for power generation through the second customer supply line. 3. The power generation system according to claim 2,
Wherein the vessel is stationed at a port and the propulsion demanding place is shut down. The method according to claim 1,
The propulsion demanding entity is a low-speed two-stroke low-pressure gas injection engine,
Wherein the power demanding customer is a heterogeneous fuel generating engine. The compressor according to claim 1,
Wherein the compressor is a centrifugal multi-stage compressor. A method according to any one of claims 1 to 5,
And a gas treatment system.

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