KR20180012611A - treatment system of boil-off gas and ship having the same - Google Patents

Abstract

The present invention relates to an evaporative gas treatment system and a vessel, comprising: a liquefied gas storage tank; A recondenser for re-condensing the evaporated gas of the liquefied gas storage tank with the liquefied gas of the liquefied gas storage tank; And a regenerator for regenerating the liquefied gas and the recondensed evaporated gas to supply it to a customer, the recondenser comprising: a tubular recondenser having a piping configuration in which the liquefied gas flows, And a tank type recondenser having a tank type in which the liquefied gas is stored and into which the evaporation gas is introduced, wherein the tubular recondenser and the tank type recondenser are connected in series or in parallel .

Description

[0001] The present invention relates to an evaporative gas treatment system and a boiler,

The present invention relates to an evaporative gas treatment system and a vessel.

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.

Such liquefied gas can be vaporized by the regasification device and then delivered to the consumer. However, when the liquefied gas is stored in the liquid state, thermal seizure occurs in the tank, so that some of the liquefied gas is vaporized to generate boil off gas (BOG). This evaporated gas is recycled, And supplied to the consumer.

Conventional re-condensers provided for recondensing the evaporation gas, however, have not solved the problems that the system stability is not sufficiently secured or the volume is too large to be disadvantageous in terms of space utilization.

It is an object of the present invention to provide an evaporative gas treatment system capable of securing both system stability and space utilization by using a tubular recondenser and a tank type recondenser in parallel, To provide a ship.

An evaporative gas treatment system according to an embodiment of the present invention includes a liquefied gas storage tank; A recondenser for re-condensing the evaporated gas of the liquefied gas storage tank with the liquefied gas of the liquefied gas storage tank; And a regenerator for regenerating the liquefied gas and the recondensed evaporated gas to supply it to a customer, the recondenser comprising: a tubular recondenser having a piping configuration in which the liquefied gas flows, And a tank type recondenser having a tank type in which the liquefied gas is stored and into which the evaporation gas is introduced, wherein the tubular recondenser and the tank type recondenser are connected in series or in parallel .

Specifically, the tubular recondenser and the tank-type recondenser may be provided in parallel based on the flow of the liquefied gas.

Specifically, the liquefied gas storage tank may further include a liquefied gas supply line connected to the customer through the recondenser.

Specifically, it may further include a liquefied gas pump provided in the liquefied gas supply line.

Specifically, the evaporative gas supply line may be connected to the recondenser in the liquefied gas storage tank.

Specifically, the evaporative gas compressor may further include an evaporative gas compressor provided in the evaporative gas supply line.

Specifically, when the tubular recondenser and the tank-type recondenser are provided in parallel based on the flow of the liquefied gas, the liquefied gas supply line is connected to the tubular recondenser and the tank-type recondenser in the liquefied gas storage tank, Lt; / RTI >

Specifically, a valve provided at a branch point or downstream of the branch point in the liquefied gas supply line may be further included.

Specifically, when the tubular recondenser and the tank-type recondenser are provided in parallel based on the flow of the evaporative gas, the evaporative gas supply line is connected to the tubular recondenser and the tank- It can be branched to the condenser.

Specifically, a valve provided at a branch point or downstream of the branch point in the evaporation gas supply line may be further included.

Specifically, it may further include a sensor provided on the liquefied gas supply line or the evaporation gas supply line to measure a temperature or a flow rate of the liquefied gas or the evaporated gas.

Specifically, the valve can regulate the branch flow of the liquefied gas or the evaporation gas according to the measured value of the sensor.

Specifically, the valve may be configured to increase the flow rate of the liquefied gas flowing into the tubular recondenser, or to increase the flow rate of the evaporation gas introduced into the tubular recondenser, when the temperature of the evaporating gas is lower than a reference value or when the flow rate of the evaporating gas is less than a reference value The flow rate of the gas can be increased.

A ship according to an embodiment of the present invention is characterized by having the evaporative gas treatment system.

The evaporative gas treatment system and the vessel according to the present invention can improve the space efficiency by reducing the size of the entire system by providing the tubular recondenser and the tank-type recondenser in series or in parallel to ensure the stability of the entire recondensing process can do.

1 is a conceptual diagram of an evaporative gas treatment system according to a first embodiment of the present invention.
2 is a conceptual diagram of an evaporative gas treatment system according to a second embodiment of the present invention.
3 is a cross-sectional view of a tubular recondenser of an evaporative gas treatment system in accordance with 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, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an evaporative gas treatment system 1 according to the present invention will be described. The present invention includes an evaporative gas treatment system 1 and a vessel having the same.

Herein, the liquefied gas may be used to mean all gas fuels generally stored in a liquid state such as LNG or LPG, ethylene, ammonia, etc. Boiling-off gas (BOG) May mean forced vaporized liquefied gas. However, the evaporation gas may be used to include not only the evaporation gas in the gaseous state but also the liquefied evaporation gas.

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

1, the evaporative gas processing system 1 according to the first embodiment of the present invention includes a liquefied gas storage tank 10, a liquefied gas pump 20, an evaporative gas compressor 30, a recondenser 40 And a regeneration device 50. [0031]

The liquefied gas storage tank 10 stores liquefied gas to be supplied to a customer (not shown). Here, the customer can be any equipment (engine, turbine, city gas, etc.) provided on the land or the ship, and is not particularly limited.

The liquefied gas storage tank 10 must store the liquefied gas in a liquid state, wherein the liquefied gas storage tank 10 can store the liquefied gas at a pressure of 1 bar to 10 bar (1.03 bar, for example).

The liquefied gas storage tank 10 may be a stand-alone type, a membrane type, and the like. The liquefied gas may be stored in a liquid state using various heat insulating structures. The evaporated gas generated in the liquefied gas storage tank 10 may be, The evaporative gas compressor 30 or the like.

Since the liquefied gas is stored in the liquefied gas storage tank 10, the evaporated gas in which the liquefied gas has spontaneously evaporated is continuously generated in the liquefied gas storage tank 10. In this case, since the internal pressure of the liquefied gas storage tank 10 can be excessive unless the evaporation gas is taken out, the evaporated gas generated in the liquefied gas storage tank 10 can be recycled and delivered to the customer together with the liquefied gas have. Therefore, the internal pressure of the liquefied gas storage tank 10 is maintained at an appropriate level.

The liquefied gas pump (20) delivers the liquefied gas from the liquefied gas storage tank (10) to a customer. The liquefied gas pump 20 may comprise a primary pump 21 as a booster pump and a secondary pump 22 as a high pressure pump. The primary pump 21 is provided in the liquefied gas storage tank 10, The car pump 22 may be provided outside the liquefied gas storage tank 10.

A liquefied gas supply line 23 may be provided from the liquefied gas storage tank 10 to a customer and a liquefied gas pump 20 is provided in the liquefied gas supply line 23. [ At this time, the primary pump 21 and the secondary pump 22 may be provided in series on the basis of the liquefied gas flow on the liquefied gas supply line 23.

Therefore, the primary pump 21 can pressurize the liquefied gas to low pressure for transferring the liquefied gas, and the secondary pump 22 can pressurize the liquefied gas pressurized by the primary pump 21 to the demand pressure of the customer (For example, high pressure).

A re-condenser 40 to be described later may be provided in the liquefied gas supply line 23 between the primary pump 21 and the secondary pump 22. That is, the liquefied gas supply line 23 is connected from the liquefied gas storage tank 10 to the customer via the recondenser 40. Thus, the primary pump 21 pressurizes the liquefied gas in the liquefied gas storage tank 10, while the secondary pump 22 pressurizes the liquefied gas and the mixture of condensed vapor.

The primary pump 21 and / or the secondary pump 22 may be provided in plural, and may be provided in series and / or in parallel. If a plurality of secondary pumps 22 are provided in parallel, the secondary pump 22 can backup each other.

The evaporative gas compressor (30) compresses the evaporated gas of the liquefied gas storage tank (10). In the liquefied gas storage tank 10, evaporation gas is continuously generated as described above, and if there is no discharge of the evaporation gas, an overpressure may occur in the liquefied gas storage tank 10. Therefore, this embodiment discharges the evaporation gas from the liquefied gas storage tank 10, and the evaporation gas compressor 30 can be used to compress the evaporation gas.

The evaporative gas supply line 31 is connected to the recondenser 40 from the liquefied gas storage tank 10 and the evaporative gas compressor 30 can be provided in the evaporative gas supply line 31. Since the liquefied gas flowing into the recondenser 40 is liquefied gas passing through the primary pump 21, the evaporating gas compressor 30 is operated in the same or similar manner as the degree to which the primary pump 21 presses the liquefied gas, .

The plurality of evaporation gas compressors 30 may be provided in multiple stages, and may be provided in multiple stages and in parallel. Of course, the arrangement of the evaporative gas compressor 30 can be varied depending on the degree to which the evaporative gas compressor 30 compresses the evaporative gas (the degree to which the primary pump 21 pressurizes the liquefied gas).

When the evaporation gas compressor 30 compresses the evaporation gas, the boiling point of the evaporation gas is increased. This means that condensation of the evaporated gas can be facilitated. That is, the evaporation gas having a boiling point of about -163 degrees at atmospheric pressure can be compressed by the evaporation gas compressor 30 to raise the boiling point to about -150 degrees Celsius, and the evaporation gas in the re-condenser 40 can reach -163 degrees The condensation can be achieved.

As the pressure of the evaporation gas and the pressure of the liquefied gas by the primary pump 21 become larger, the boiling point may increase. However, if the pressure is too high, there is a problem of structural problems of the recondensor 40, May occur. Therefore, the evaporative gas compressor (30) and the primary pump (21) can pressurize the evaporation gas or the liquefied gas to about 1 to 50 bar. Of course, this pressure range can vary.

The recondenser 40 recycles the evaporated gas of the liquefied gas storage tank 10 with the liquefied gas of the liquefied gas storage tank 10. The recondenser 40 is provided on the liquefied gas supply line 23, and the evaporation gas supply line 31 can be connected.

The liquefied gas flowing into the recondenser 40 through the liquefied gas supply line 23 is pressurized by the primary pump 21 and flows into the recondenser 40 through the evaporated gas supply line 31 The evaporation gas may be pressurized by the evaporative gas compressor (30).

The recondenser 40 may comprise a tubular recondenser 41 and a tank-type recondenser 42. The tubular recondenser 41 has the form of a pipe 411 through which the liquefied gas flows and the evaporation gas joins. The tubular recondenser 41 will be described in detail with reference to FIG.

3 is a cross-sectional view of a tubular recondenser of an evaporative gas treatment system in accordance with the present invention.

3, the tubular recondenser 41 has a pipe 411 provided in parallel with the liquefied gas supply line 23 and provided with an inlet and an outlet, wherein the pipe 411 is connected to the liquefied gas supply line 23 ) May be somewhat expanded in cross-sectional area.

The liquefied gas may flow in the pipe 411 and the evaporation gas inlet 412 may be provided in the pipe 411. The evaporation gas inlet 412 is connected to the evaporation gas supply line 31 and is formed in a small tube shape provided inside the pipe 411 and may be arranged to be inclined with respect to the pipe 411.

A plurality of holes (not shown) may be provided in the circumferential direction along the flow direction of the liquefied gas, and the evaporation gas may be introduced into the pipe 411 through the evaporation gas inlet 412 ). ≪ / RTI >

At this time, the evaporation gas can be mixed with the liquefied gas through the end of the evaporation gas inlet 412 (lower end in the drawing) or mixed with the liquefied gas through the holes provided around the evaporation gas inlet 412 .

Although the pipe 411 is expanded relative to the liquefied gas supply line 23, the cross-sectional area is not relatively large, so that the evaporation gas and the liquefied gas may not be sufficiently mixed. Therefore, in this embodiment, the flow control unit 413 may be provided in the pipe 411.

The flow regulating portion 413 is provided at a position downstream of the position where the evaporation gas inlet portion 412 is provided in the pipe 411 and has a plate shape. The plate shape may be a closed plate shape or an open plate shape in which holes are provided.

The flow regulating section 413 may be composed of a plurality of plates arranged in a zigzag pattern. That is, the mixture of the liquefied gas and the evaporated gas can flow in a zigzag shape by the flow regulating portion 413. [

Therefore, even in the pipe 411 whose sectional area is not larger than that of the tank-type recondenser 42, the tubular recondenser 41 can ensure the mixed area of the evaporated gas and the liquefied gas. Of course, the flow regulating section 413 may have various structures that allow the evaporation gas and the liquefied gas to flow sufficiently in the piping 411 in addition to the drawings and the above description.

The tank-type recondenser 42 has a form in which the liquefied gas is temporarily stored and the evaporation gas is introduced. The tank-type recondenser 42 may have a considerably larger cross-sectional area than the pipe 411 of the tubular recondenser 41.

A liquefied gas supply line 23 is connected to the tank-type recondenser 42. In this embodiment, the tank-type recondenser 42 may be provided in series with the tubular recondenser 41 on the liquefied gas supply line 23, and the liquefied gas supply line 23 May be a liquefied gas supply line 23 through which the liquefied gas mixed with the evaporative gas flows through the tubular recondenser 41 and a liquefied gas supply line 23 bypassing the tubular recondenser 41.

The evaporated gas entering the tubular recondenser 41 may be at least partially condensed by the liquefied gas and then introduced into the tank-type recondenser 42 and further condensed by the liquefied gas. That is, the tubular recondenser 41 and the tank-type recondenser 42 are provided in series on the basis of the flow of the evaporating gas.

However, the tubular recondenser 41 and the tank-type recondenser 42 may be provided in parallel based on the flow of the liquefied gas. In this case, the liquefied gas supply line 23 may be branched from the liquefied gas storage tank 10 to the tubular recondenser 41 and the tank-type recondenser 42.

That is, the evaporated gas introduced into the tubular recondenser 41 can be condensed by the liquefied gas supplied from the liquefied gas storage tank 10, and the evaporated gas introduced into the tank-type recondenser 42 Condensed by the re-condenser 41) can also be condensed by the liquefied gas supplied from the liquefied gas storage tank 10, wherein the liquefied gas is liquefied gas that has not passed through the tubular recondensor 41. [

Therefore, in this embodiment, since the evaporated gas is primarily cooled by the low-temperature liquefied gas in the tubular recondenser 41 and can be cooled secondarily by the low-temperature liquefied gas in the tank-type recondenser 42, It is possible to increase the re-liquefaction efficiency.

The liquefied gas supply line 23 through the tubular recondenser 41 of the liquefied gas supply line 23 connected to the tank-type recondenser 42 as shown in the figure is connected to the liquefied gas supply line 23 through the tubular recondenser 41, And may be connected to the upper side of the supply line 23.

In this case, the evaporated gas at least partially condensed through the tubular recondenser (41) can be condensed while abutting the liquefied gas supplied from the liquefied gas storage tank (10). However, the uncompensated evaporation gas may not sufficiently contact with the liquefied gas while being positioned above the tank-type recondenser 42. In this case, as the internal pressure of the tank-type recondenser 42 gradually increases, the boiling point of the evaporated gas The liquefaction of the evaporation gas can be promoted.

The tank type recondenser 42 may be provided with a gas discharge line (not shown) in order to prevent overpressure of the tank type recondenser 42, The gas discharge line is opened and the evaporation gas can be partially discharged to the outside. The gas discharge line may be connected to the liquefied gas storage tank 10 or connected to the vaporized gas supply line 31 upstream of the tank-type recondenser 42 or the tubular recondenser 41.

The liquefied gas supply line 23 through the tubular recondenser 41 in the tank type recondenser 42 can be connected to the lower side of the liquefied gas supply line 23 which does not pass through the tubular recondenser 41 have. In this case, the liquefied gas supply line 23 not passing through the tubular recondenser 41 may be provided in the form of a spray for spraying the liquefied gas inside the tank-type recondenser 42.

Therefore, the evaporative gas flowing through the tubular recondenser 41 is condensed as it is sufficiently brought into contact with the liquefied gas injected from above, so that the recondensing efficiency of the evaporated gas can be increased. In this case, however, the evaporated gas flowing into the tank-type recondenser 42 remains in a gaseous state, which can be reduced compared to that shown in the figure, so that overpressure in the tank-type recondenser 42 can be prevented.

As described above, the tubular recondenser 41 and the tank-type recondenser 42 are provided in parallel on the basis of the flow of the liquefied gas in series based on the flow of the evaporation gas. In the liquefied gas supply line 23, Or downstream of the branch point, a valve 25 may be provided.

The liquefied gas supply line 23 and / or the evaporation gas supply line 31 may further include sensors 24 and 32 for measuring the temperature and / or the flow rate of the liquefied gas and / or the evaporated gas. At this time, the valve 25 can regulate the branch flow of the liquefied gas according to the measured values of the sensors 24 and 32.

The volume of the tubular recondenser 41 is smaller than that of the tank-type recondenser 42, so that the recondensing performance of the tank-type recondenser 42 is lowered. In consideration of this, in the case where it is determined that a large amount of liquefied gas is not needed when recondensing the evaporated gas (when the temperature of the evaporated gas is lower than the reference value and / or when the flow rate of the evaporated gas is less than the reference value) It is possible to further increase the flow rate of the liquefied gas flowing into the gas-liquid separator 41.

That is, in the present embodiment, the tubular recondenser 41 and the tank-type recondenser 42 are arranged in parallel on the basis of the liquefied gas. However, since the temperature of the evaporating gas is already low or the flow rate is not so large, The flow can be adjusted so that the re-condensation of the evaporated gas can be sufficiently performed in the tubular recondenser 41. [0054]

In this case, since the (almost) recycled evaporated gas is already introduced into the tubular recondenser 42 by the tubular recondenser 41, the internal pressure of the tank-type recondenser 42 can be maintained at a stable level.

Of course, the above control can also be reversed. For example, when the temperature of the evaporation gas is high and the flow rate is large, the flow rate of the liquefied gas flowing into the tank-type recondenser 42 can be increased by the valve 25. [

Further, unlike the above control, the flow of the liquefied gas toward the tubular recondenser 41 and the tank-type recondenser 42 can be variously determined depending on the temperature / flow rate of the evaporating gas. That is, the flow of the liquefied gas by the valve 25 is not limited to the above.

The regasification apparatus (50) regenerates the liquefied gas and the recycled evaporated gas and supplies it to the customer. The regasification unit 50 may be a heat exchanger for heating the liquefied gas or the like by using the fruit. The fruit may be a variety of materials such as fresh water, seawater, steam, glycol water, propane, R134a and R218.

The regasification apparatus 50 can regulate the flow rate of the fruit according to the temperature of the liquefied gas measured by the sensor 24 provided in the liquefied gas supply line 23. [ Since the sensor 24 may be provided downstream of the tubular recondenser 41 and the tank-type recondenser 42, the temperature of the liquefied gas measured by the sensor 24 may be lower than the temperature after the evaporation gas is mixed Lt; / RTI >

Therefore, the regasification apparatus 50 can calculate the flow rate of the necessary heat based on the temperature of the liquefied gas in which the evaporated gas is mixed, and accordingly, the liquefied gas or the like can be appropriately heated to a desired temperature by the customer.

As described above, the present embodiment has a tubular recondenser 41 having a small volume but somewhat poor condensing performance, and a tank-type recondenser 42 having a large condensing capacity but a large volume. The tubular recondenser 41 and the tank- The recondensers 42 may be provided in parallel on the basis of the flow of the liquefied gas in series based on the flow of the evaporated gas so as to ensure the efficiency of recondensing the evaporated gas.

2 is a conceptual diagram of an evaporative gas treatment system according to a second embodiment of the present invention.

Referring to FIG. 2, the evaporative gas processing system 1 according to the second embodiment of the present invention includes a tubular recondenser 41 provided in parallel with the flow of the liquefied gas in the same or similar manner as the first embodiment, And a tank-type recondenser 42. Unlike the first embodiment, the tubular recondenser 41 and the tank-type recondenser 42 may be provided in parallel based on the flow of the evaporative gas.

Hereinafter, the present embodiment will be mainly described with respect to differences from the other embodiments, and the portions omitted in the description will be replaced with those in the other embodiments.

In this embodiment, the evaporation gas supply line 31 may be branch connected to the tubular recondenser 41 and the tank-type recondenser 42, respectively. At this time, a valve 33 is provided at a branch point or a branch point in the evaporation gas supply line 31.

The valve 33 is controlled according to the measured values of the sensors 24 and 32 as described above. In this embodiment, the valve 33 adjusts the flow rate of the evaporation gas according to the measured values of the sensors 24 and 32 .

Specifically, the valve 33 can increase the flow rate of the evaporated gas flowing into the tubular recondenser 41 when the temperature of the evaporated gas is lower than the reference value and / or when the flow rate of the evaporated gas is smaller than the reference value.

That is, in this embodiment, similarly to the first embodiment, the tubular recondenser 41 can be mainly utilized when the state of the evaporated gas is checked and as a result, the cold heat required for recondensing the evaporated gas is not much.

Thus, in the present embodiment, the flow rate of the evaporative gas delivered to the tubular recondenser 41 is increased by using the valve 33, and the flow rate of the evaporative gas that is relatively transferred to the tank-type recondenser 42 can be reduced . In this case, overpressure of the tank-type recondenser 42 is prevented.

Of course, in the present embodiment, since the tubular recondenser 41 and the tank-type recondenser 42 are arranged in parallel not only on the basis of the flow of the evaporating gas but also on the basis of the flow of the liquefied gas, The valve 33 provided in the line 31 and the valve 25 provided in the liquefied gas supply line 23 can be interlocked controlled in accordance with the measured values of the sensors 24 and 32.

As described above, in the present embodiment, the tubular recondenser 41 and the tank-type recondenser 42 are arranged in parallel even on the basis of the flow of the evaporating gas so that the position of the re-condensing is freely adjustable, have.

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: Evaporative gas treatment system 10: Liquefied gas storage tank
20: liquefied gas pump 21: primary pump
22: Secondary pump 23: Liquefied gas supply line
24: sensor 25: valve
30: Evaporative gas compressor 31: Evaporative gas supply line
32: sensor 33: valve
40: recondenser 41: tubular recondenser
411: Piping 412: Evaporation gas inlet
413: flow regulator 42: tank-type recondenser
50: Regenerator

Claims (14)

Liquefied gas storage tanks;
A recondenser for re-condensing the evaporated gas of the liquefied gas storage tank with the liquefied gas of the liquefied gas storage tank; And
And a regenerating device for regenerating the liquefied gas and the recondensed evaporated gas and supplying the regenerated gas to a customer,
The re-
And a tank type recondenser having a tank type in which the liquefied gas is stored and into which the evaporation gas is introduced, wherein the tank type recondenser has a pipe type in which the liquefied gas flows and the evaporation gas is merged,
Wherein the tubular recondenser and the tank-type recondenser are provided in series or parallel to each other based on the flow of the evaporating gas. 2. The apparatus of claim 1, wherein the tubular recondenser and the tank-
Wherein the gas is provided in parallel on the basis of the flow of the liquefied gas. 3. The method of claim 2,
Further comprising a liquefied gas supply line connected to the consumer through the recondenser in the liquefied gas storage tank. The method of claim 3,
Further comprising a liquefied gas pump provided in the liquefied gas supply line. 3. The method of claim 2,
Further comprising an evaporative gas supply line connected to said recondenser in said liquefied gas storage tank. 6. The method of claim 5,
Further comprising an evaporative gas compressor provided in the evaporative gas supply line. 3. The method of claim 2,
When the tubular recondenser and the tank-type recondenser are provided in parallel based on the flow of the liquefied gas, the liquefied gas supply line is branched from the liquefied gas storage tank to the tubular recondenser and the tank- Wherein the vaporized gas is a vaporized gas. 8. The method of claim 7,
Further comprising a valve provided at a branch point or downstream of the branch point in the liquefied gas supply line. 3. The method of claim 2,
When the tubular recondenser and the tank-type recondenser are provided in parallel based on the flow of the evaporating gas,
Wherein said evaporation gas supply line is branched from said liquefied gas storage tank to said tubular recondenser and said tank-type recondenser. 10. The method of claim 9,
Further comprising a valve provided at a branch point or downstream of the branch point in the evaporation gas supply line. 11. The method according to claim 8 or 10,
Further comprising a sensor provided on the liquefied gas supply line or the evaporation gas supply line for measuring a temperature or a flow rate of the liquefied gas or the evaporated gas. 12. The valve according to claim 11,
And the branch flow of the liquefied gas or the evaporation gas is adjusted according to the measured value of the sensor. 13. The valve according to claim 12,
The flow rate of the liquefied gas flowing into the tubular recondenser is increased or the flow rate of the evaporation gas flowing into the tubular recondenser is increased when the temperature of the evaporation gas is lower than the reference value or when the flow rate of the evaporation gas is lower than the reference value Wherein the evaporation gas processing system comprises: A ship having the vapor gas treatment system according to any one of claims 1 to 13.

Images