KR20190042262A - Gas treatment system and ship having the same - Google Patents

Abstract

The present invention relates to a gas treatment system and a ship. The gas treatment system includes: a boil off gas storage tank storing boil off gas generated from a liquefied gas storage tank to which liquefied gas is supplied during bunkering; and a boil off gas heat exchanger using liquefied gas supplied thereto during bunkering to cool boil off gas transmitted to the boil off gas storage tank, wherein the boil off gas storage tank uses an absorbent to absorb and store the boil off gas.

Description

[0001] DESCRIPTION [0002] Gas treatment systems and vessels [0003]

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

A ship is a means of transporting large quantities of minerals, crude oil, natural gas, or more than a thousand containers. It is made of steel and buoyant to float on the water surface. ≪ / RTI >

Such a ship generates thrust by driving an engine or a gas turbine. At this time, the engine uses a fuel such as gasoline or diesel to move the piston so that the crankshaft is rotated by the reciprocating motion of the piston, and a shaft connected to the crankshaft While the gas turbine is driven by the combustion of the fuel with compressed air, and the turbine blades are rotated through the temperature / pressure of the combustion air to generate power and transfer power to the propeller.

In recent years, however, LNG carriers have been used as fuel for LNG carriers. LNG carriers have been used to drive demand for engines and turbines. Is applied to ships other than LNG carriers.

Generally, it is known that LNG is a clean fuel and its reserves are more abundant than petroleum, and its usage is rapidly increasing as mining and transfer technology develops. This LNG is generally stored in a liquid state at a temperature of -162 ° C. or below under 1 atm. The volume of liquefied methane is about one sixth of the volume of methane in a gaseous state, The specific gravity is 0.42, which is about one half of that of crude oil.

However, the temperature and pressure required to drive demand can differ from the state of the LNG stored in the tank. Therefore, in recent years, research and development have been conducted on technologies for controlling the temperature and pressure of LNG stored in a liquid state and supplying it to customers.

It is an object of the present invention to provide a gas processing system and a method of manufacturing a gas processing system capable of securing storage efficiency while enhancing stability through a method of adsorbing and storing a gas to a sorbent material, .

It is also an object of the present invention to provide a gas processing system and a ship capable of efficiently storing and reusing surplus gas by adsorbing and storing a surplus gas that is not consumed in a consumer site on a sorbent material.

It is also an object of the present invention to provide a gas processing system and a vessel capable of preventing waste of evaporated gas by adsorbing and storing evaporative gas generated when a liquefied gas is supplied from a bunker vessel to a gas propulsion vessel with an adsorbent .

A gas treatment system according to one aspect of the present invention includes: an evaporative gas storage tank for storing evaporative gas generated from a liquefied gas storage tank to which liquefied gas is supplied during bunkering; And an evaporation gas heat exchanger for cooling the evaporation gas delivered to the evaporation gas storage tank using liquefied gas supplied at the time of bunkering, wherein the evaporation gas storage tank adsorbs and stores the evaporation gas using an adsorbent .

Specifically, a bunkering line is connected to the liquefied gas storage tank from the bunkering tank for bunkering, and the evaporating gas heat exchanger may be provided on the bunkering line.

Specifically, the bypass line may be provided to bypass the evaporation gas heat exchanger in the bunkering line.

Specifically, an evaporative gas recovery line connected from the liquefied gas storage tank to the bunkering tank for recovering evaporative gas; And an evaporative gas delivery line branched from the evaporative gas recovery line and connected to the evaporative gas storage tank.

Specifically, an evaporative gas sensor provided on the evaporative gas collection line or the evaporative gas delivery line to measure the temperature of the evaporated gas; And a bypass valve provided on the bypass line, wherein the bypass valve can be adjusted in opening degree according to a temperature of the evaporation gas measured by the evaporation gas sensor.

Specifically, the compressor may further include a compressor provided on the evaporative gas recovery line or the evaporative gas delivery line to compress evaporative gas discharged from the liquefied gas storage tank.

Specifically, the compressor can control the pressure for compressing the evaporation gas according to the storage amount of the evaporation gas storage tank.

A ship according to one aspect of the present invention is characterized by having the gas treatment system.

The gas treatment system and the ship according to the present invention can adsorb and store gas on a sorbent material and then can supply the gas to the engine by removing the gas from the sorbent material and utilizing the exhaust heat of the engine when the gas is desorbed, .

Further, in the gas treatment system and the vessel according to the present invention, a surplus gas is adsorbed on a sorbent material and stored. When the gas is insufficient, surplus gas can be desorbed from the sorbent material and used. In order to increase adsorption and desorption efficiency of surplus gas, It is possible to secure both efficiency and stability.

Further, the gas treatment system and the vessel according to the present invention can adsorb and store the evaporation gas generated during bunkering on the adsorbent, thereby preventing the evaporation gas, which is generated excessively during the bunkering process, from burning out.

1 is a conceptual diagram of a gas processing system according to a first embodiment of the present invention.
2 is a conceptual diagram of a gas processing system according to a second embodiment of the present invention.
3 is a conceptual diagram of a gas processing system according to a third embodiment of the present invention.
4 is a conceptual diagram of a gas processing system according to a fourth 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, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, a gas treatment system of the present invention will be described, and the present invention includes a gas treatment system and a vessel having the gas treatment system. In addition to the liquefied gas carriers carrying liquefied gas, the vessels are used to mean general merchant vessels that do not limit vessel types such as container ships, or marine plants such as FSRU and FLNG. In addition to vessels supplied for loading liquefied gas or used as fuel, ships may also include bunkering vessels for supplying liquefied gas to other vessels or land.

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 a gas processing system according to a first embodiment of the present invention.

Referring to FIG. 1, a gas processing system 1 according to a first embodiment of the present invention includes a gas storage tank 10, a heat transfer portion 20, and an oil storage tank 30.

The gas storage tank 10 stores gas. The gas stored in the gas storage tank 10 may be natural gas, but the present invention is not particularly limited thereto.

The gas storage tank 10 adsorbs and stores the gas using a sorbent material. When the gas is natural gas, the gas storage tank 10 may store Absorbed Natural Gas (ANG). At this time, the adsorbent may be activated carbon or the like, and may be various materials adsorbing and storing the gas.

The gas adsorbed and stored in the gas storage tank 10 may be desorbed from the adsorbent and supplied to the engine 100, which is the customer 100. At this time, the engine 100 may be a propulsion engine 100 that consumes gas to generate power for propelling the ship.

The pressure of the gas consumed by the engine 100 is not particularly limited, and may be a low pressure of 1 to 10 bar, a high pressure of 200 to 400 bar, or the like. In place of the engine 100, a turbine, a city gas, or the like may be used as the customer 100.

When the gas storage tank 10 uses the adsorbent to store the gas, the storage capacity may vary depending on the temperature. That is, since the gas can be more adsorbed to the adsorbent when the temperature is low, the storage capacity of the gas storage tank 10 can be increased if the temperature is lowered.

On the other hand, if the temperature is high, the storage capacity of the gas storage tank 10 can be reduced because the gas tends to be desorbed from the adsorbent. This embodiment can utilize the heat of the exhaust gas to desorb gas from the adsorbent using this point.

Also, in the gas storage tank 10, when the pressure is increased, the storage capacity of the gas is increased, and when the pressure is lowered, the storage capacity of the gas may be reduced. The decrease in the storage capacity of the gas means that the gas tends to be desorbed from the adsorbent similarly to the case where the temperature is higher than the previous temperature. Therefore, in the present embodiment, the pressure of the gas storage tank 10 is adjusted by using the gas discharge valve 16 or the like So that the detachment of the gas can be realized.

A gas supply line 13 may be provided from the gas storage tank 10 to the engine 100 and a compressor 11 and a heater 12 may be provided in the gas supply line 13. [

The compressor (11) is capable of compressing the gas desorbed from the adsorbent and discharged from the gas storage tank (10). The compressors 11 may be provided in plural, and may be arranged in series and / or in parallel. The number and arrangement of the compressors 11 may vary depending on the pressure required by the engine 100, which is the customer 100.

The heater (12) is provided downstream of the compressor (11) and can heat the compressed gas. The temperature of the gas heated by the heater 12 may be the temperature required by the engine 100. At this time, the heater 12 can utilize various heat sources, for example, various kinds of waste heat (exhaust heat, waste heat generated from the driving equipment, etc.) generated in the ship, steam, glycol water, seawater and the like can be used.

The gas storage tank 10 may be provided with a gas discharge line 14. The gas discharge line 14 is configured to discharge the gas contained in the gas storage tank 10 to the outside, and the internal pressure of the gas storage tank 10 can be lowered by discharging the gas.

As described above, the adsorbent of the gas storage tank 10 can be desorbed when the pressure is lowered. Therefore, when the internal pressure of the gas storage tank 10 is lowered as the gas is discharged by the gas discharge line 14, the gas can be desorbed from the adsorbent.

The gas discharge line 14 is provided with a gas combustion device 15 so as to burn gas discharged from the gas storage tank 10. The gas discharge line 14 is provided with a gas discharge valve 16 and the gas discharge valve 16 can regulate the flow rate of the gas discharged from the gas storage tank 10 through the gas discharge line 14. [

The gas discharge valve 16 can regulate the internal pressure of the gas storage tank 10 by regulating the flow rate of the gas discharged from the gas storage tank 10. This means that the amount of gas desorbed from the adsorbent in the gas storage tank 10 is regulated.

The present embodiment can lower the internal pressure of the gas storage tank 10 by using the gas discharge valve 16 so that the gas is smoothly transferred from the gas storage tank 10 to the engine 100 as the customer 100 have.

The heat transfer unit 20 transfers the exhaust heat of the engine 100 to the gas storage tank 10. The gas discharged from the gas storage tank 10 can not meet the demand of the engine 100 unless the gas storage tank 10 is subjected to another operation (heat addition, pressure reduction, etc.) It may not be enough.

Therefore, the present embodiment can increase the flow rate of the gas desorbed and discharged from the adsorbent in the gas storage tank 10 by utilizing the exhaust heat of the engine 100 when the engine 100 is operated. For this purpose, the heat transfer portion 20 may include a heat recovery portion 21 and a heat transfer line 22. [

The heat recovery unit 21 recovers exhaust heat of the engine 100. The heat recovery unit 21 can heat only the heat of the exhaust by exchanging the exhaust with other heat, or can recover the exhaust itself.

In the case where the heat recovery unit 21 recovers the exhaust gas itself or the material is different from the adsorbent and gas stored in the gas storage tank 10, the exhaust gas or the heat is transferred to the gas storage tank 10, Or contamination of the adsorbent may occur.

In order to solve this problem, the heat transfer line 22 may be provided in such a structure that the exhaust gas does not directly reach the adsorbent and gas contained in the gas storage tank 10. Of course, when the heat recovering unit 21 uses the heat that is heat-exchanged with the exhaust gas as the same or similar material as the gas or the adsorbent, or when the heat is used as a material that can be directly introduced into the gas storage tank 10, And may be provided with a structure for supplying the inside of the gas storage tank 10 with the heat.

Of course, this embodiment may not be limited to the above-described structure or the manner in which exhaust heat is transferred to the gas storage tank 10. However, the present embodiment can adopt any configuration if exhaust heat generated when the engine 100 is operated is used to detach the gas from the adsorbent in the gas storage tank 10.

In this embodiment, the heat of the cooling water used in the engine 100 may be used together with the exhaust heat of the engine 100 or in place of the exhaust heat to desorb the gas from the adsorbent. That is, this embodiment can utilize various waste heat (exhaust heat, cooling water heat, etc.) generated in the engine 100 without limit.

The engine 100 in which the heat transfer portion 20 recovers the exhaust heat may not be the engine 100 consuming the gas exhausted from the gas storage tank 10 . If the temperature of the gas storage tank 10 is low and the pressure is high, detachment of the gas can not be performed well, the operation of the engine 100 may be hindered.

The heat transfer unit 20 transfers heat to the gas storage tank 10 using another engine 100 instead of the engine 100 driven by the gas in the gas storage tank 10, And discharge can be effected. Of course, as described above, the heat transfer unit 20 can assist in desorption of gas by utilizing other heat (including heat used in the heater 12) generated in the ship such as a boiler, not the engine 100. [

However, the engine 100 may be operated by oil instead of gas, which will be described later. That is, if it is detected that the gas is not smoothly discharged from the gas storage tank 10, the oil may be supplied to the engine 100 and the engine 100 may be operated by the oil.

Then, when heat generated in the engine 100 is transferred to the gas storage tank 10 to realize desorption and discharge of the gas, the engine 100 can switch the operation to gas. Therefore, if the flow rate of the gas flowing along the gas supply line 13 is less than the reference value (or if the pressure of the gas storage tank 10 is higher than the reference value or the temperature is lower than the reference value) ) Can switch operations to oil.

The oil storage tank 30 stores oil. The engine 100 may be a heterogeneous fuel engine 100 consuming gas or oil and the present embodiment may be provided with an oil storage tank 30 in case the engine 100 can not consume gas.

An oil supply line 31 may be connected to the engine 100 in the oil storage tank 30 and an oil pump may be provided in the oil supply line 31 to transfer the oil. As mentioned above, the oil pump is operable when the engine 100 is to be operated with oil, so that the oil can be delivered to the engine 100.

As described above, according to the present embodiment, compared to a general tank in which a gas is stored in a liquid phase, the storage efficiency of the gas can be enhanced by storing the gas using the adsorbent material, and the gas of the engine 100 can be desorbed and discharged using the heat of the engine 100, Consumption can be guaranteed.

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

Referring to Fig. 2, the gas processing system 1 according to the second embodiment of the present invention includes a liquefied gas storage tank 40, and an excess gas storage tank 50.

The liquefied gas storage tank 40 stores the liquefied gas. The liquefied gas may store the liquefied gas to be supplied to the customer 100, and the customer 100 may be the engine 100 described in the first embodiment.

The liquefied gas storage tank 40 must store the liquefied gas in a liquid state, wherein the liquefied gas storage tank 40 can store the liquefied gas at a pressure of 1 bar to 10 bar (1.03 bar, for example).

The liquefied gas storage tank 40 may be a stand-alone type, a membrane type, or the like, and various liquefied structures may be used to store the liquefied gas in a liquid state. However, in the liquefied gas storage tank 40, the evaporated gas in which the liquefied gas spontaneously evaporates is continuously generated. At this time, the evaporated gas generated in the liquefied gas storage tank 40 may be processed by a compressor 41 or the like to be described later.

The evaporator gas supply line 43 may be connected from the liquefied gas storage tank 40 to the customer 100 and the compressor 41 may be provided in the evaporation gas supply line 43. The compressor 41 is the same as or similar to the compressor 11 in the first embodiment.

In this embodiment, the compressor 41 is capable of compressing the evaporated gas discharged from the liquefied gas storage tank 40, and may be provided in plural, for example, five stages or the like. At this time, the consumer 100 may be connected to the downstream of the five-stage compressor 41 or the downstream of the two-stage compressor 41 depending on the required pressure.

Compressed heat may be generated in the process of compressing the evaporated gas by the compressor 41, and the volume of the evaporated gas may increase, leading to an increase in the load of the compressor 41. Therefore, in the present embodiment, a cooler 42 may be disposed downstream of each compressor 41 to prevent this.

The cooler 42 can cool the evaporated gas heated by the compressed heat. The cooler 42 may be provided downstream of the respective compressors 41 so that the cooler 42 may be provided between the two compressors 41 when the multi-stage compressors 41 are provided in series.

However, the cooler 42 is shown as being located downstream of the compressor 41, which is the most downstream in the drawing, in which the cooler 42 can be replaced by a heater 12. This is to prepare for the case where the multi-stage compressed evaporated gas is lower than the required temperature of the consumer 100. Or if the multi-stage compressed evaporated gas is suitable for the required temperature of the consumer 100, the cooler 42 at the downstream most can be omitted.

The present invention is not limited to the case where the liquefied gas supplied from the liquefied gas storage tank 40 to the customer 100 or the evaporation gas supply line 43 is supplied to the customer 100 in case the flow rate of the evaporation gas does not reach the desired flow rate in the customer 100 Line 45 as shown in FIG.

The liquefied gas supply line 45 may be connected from the liquefied gas storage tank 40 to the customer 100 or the evaporation gas supply line 43 and a vaporizer 46 may be provided. The vaporizer 46 can vaporize the liquefied gas using various heat sources and deliver it to the consumer 100.

The liquefied gas supply line 45 may be provided with a liquefied gas pump (not shown), and the liquefied gas pump may be installed inside and / or outside the liquefied gas storage tank 40. The liquefied gas pump may be provided in two or more units and may be arranged in series and / or in parallel.

The evaporation gas supply line 43 is provided with an evaporation gas discharge line 431. The evaporation gas is generated in the liquefied gas storage tank 40 and is discharged along the evaporation gas supply line 43. When the discharge amount of the evaporation gas is excessive, at least a part of the evaporation gas Can be discharged to the outside.

At this time, the evaporation gas discharge line 431 is provided with an evaporative gas combustion device 432 for burning the evaporative gas, and an evaporative gas discharge valve 433 for controlling discharge of the evaporative gas to prevent overpressure may be provided.

The evaporation gas discharge valve 433 sets a reference value and opens when the internal pressure of the evaporation gas supply line 43 is equal to or higher than the reference value so that at least a part of the evaporation gas can be discharged to the outside through the evaporation gas discharge line 431 have. Whereby the internal pressure of the evaporation gas supply line 43 can be maintained at an appropriate pressure.

The surplus gas storage tank 50 stores a surplus gas exceeding the consumption amount of the customer 100 among the liquefied gas or the evaporation gas discharged from the liquefied gas storage tank 40. The surplus gas storage tank 50 stores the surplus gas among the evaporated gas when the evaporated gas discharged from the liquefied gas storage tank 40 is larger than the consumed amount of the demanded customer 100.

On the other hand, the surplus gas storage tank 50 stores the vaporized liquefied gas by the vaporizer 46 as surplus gas after the liquefied gas is discharged after it is determined that the vaporized gas is less than the consumption amount of the customer 100, When the surplus gas is generated unexpectedly (due to a cause such as a load drop of the engine 100 or the like) in the process of being transmitted to the customer 100.

The surplus gas storage tank 50 can adsorb and store surplus gas by using a sorbent like the gas storage tank 10 described in the first embodiment. That is, the surplus gas storage tank 50 may have a higher storage efficiency than the liquefied gas storage tank 40.

The surplus gas storage tank (50) may be provided with an excess gas storage line (51). The excess gas storage line 51 may be branched from the evaporation gas supply line 43 and connected to the surplus gas storage tank 50.

The surplus gas storage line 51 can be branched from the evaporation gas supply line 43 downstream of the compressor 41 and the branch point of the surplus gas storage line 51 can be branched from the storage Can be variously determined depending on the pressure and the compression pressure of the compressor (41).

An excess gas transmission line 53 is connected to the excess gas storage tank 50. The excess gas transmission line 53 is connected to the evaporation gas supply line 43 in the excess gas storage tank 50. [ The surplus gas storage line 51 is configured to allow surplus gas to flow into the surplus gas storage tank 50 while the surplus gas transmission line 53 is configured to supply surplus gas from the surplus gas storage tank 50 to the customer 100 Or the like.

The surplus gas delivery line 53 may be joined to the evaporation gas supply line 43 upstream of any one of the compressors 41. The point where the surplus gas delivery line 53 is connected to the evaporation gas supply line 43 can be variously determined according to the storage pressure of the surplus gas storage tank 50 and the required pressure of the customer 100.

The surplus gas storage tank (50) may be provided with an excess gas discharge line (55). Like the gas storage tank 10 described in the first embodiment, the surplus gas storage tank 50 sucks well when the temperature is low and the pressure is high, and desorbs when the temperature is high and the pressure is low.

Therefore, in the present embodiment, when surplus gas is to be taken out from the surplus gas storage tank 50 and transferred to the customer 100, surplus gas in the surplus gas storage tank 50 is discharged to the surplus gas discharge line 55, The internal pressure of the gas storage tank 50 can be lowered.

The surplus gas discharge line 55 may discharge the surplus gas to the outside or may transfer it to the surplus gas combustion apparatus 56 connected to the surplus gas discharge line 55 and may discharge the surplus gas to the surplus gas discharge line 55 And can be adjusted by the surplus gas discharge valve 57 provided.

The surplus gas discharge valve 57 can discharge the surplus gas of the surplus gas storage tank 50 to the outside so as to lower the pressure of the surplus gas storage tank 50 so that surplus gas can be desorbed from the sorbent material.

As described above, in the present embodiment, when excess gas among the liquefied gas / evaporated gas supplied from the liquefied gas storage tank 40 to the customer 100 is generated, it is supplied to the surplus gas storage tank 50 By storing it, efficient system operation is possible and waste of fuel can be prevented.

3 is a conceptual diagram of a gas processing system according to a third embodiment of the present invention.

Referring to Fig. 3, the gas processing system 1 according to the third embodiment of the present invention may further include an inlet side heat exchanger 52 and an exhaust side heat exchanger 54 as compared with the second embodiment. Hereinafter, the omission of the description will be replaced with the description of the other embodiments.

The inlet-side heat exchanger 52 can heat-exchange the evaporated gas, which is provided in the excess gas storage line 51 and discharged from the liquefied gas storage tank 40, with the surplus gas introduced into the excess gas storage tank 50.

As described above, when the surplus gas is stored by adsorption, the adsorption is more likely to occur when the temperature of the surplus gas is low. Therefore, in this embodiment, the extremely low temperature evaporated gas discharged from the liquefied gas storage tank 40 can be used to increase the storage efficiency of the surplus gas.

To this end, the evaporation gas supply line 43 may be provided with a vapor bypass line 44 connected to the inlet heat exchanger 52. The evaporation gas bypass line 44 may branch out from the evaporation gas supply line 43 and then rejoin the evaporation gas supply line 43 after passing through the inlet side heat exchanger 52. In the inlet side heat exchanger 52, The heat-exchanged evaporated gas can be introduced into the compressor 41 in a state where the temperature is raised. This causes a load increase of the compressor (41).

However, this embodiment can solve this problem through the discharge-side heat exchanger 54. [

The discharge-side heat exchanger 54 can heat-exchange the evaporated gas, which is provided in the excess gas transfer line 53 and discharged from the liquefied gas storage tank 40, with excess gas discharged from the excess gas storage tank 50.

The excess gas storage line 51 is in the state of being subjected to the heat of compression because it is branched from the evaporation gas supply line 43 downstream of any one of the compressors 41 so that heat exchange with the evaporation gas in the inlet heat exchanger 52, .

However, the heated evaporated gas can be cooled again by heat exchange with the surplus gas in the discharge side heat exchanger 54, and the cooled evaporated gas flows into the compressor 41, so that an increase in the load of the compressor 41 can be prevented .

The evaporation gas bypass line 44 may be branched from the evaporation gas supply line 43 and connected to the evaporation gas supply line 43 via the inlet side heat exchanger 52 and the discharge side heat exchanger 54. That is, the inlet-side heat exchanger 52 and the discharge-side heat exchanger 54 may be provided in series on the evaporative gas bypass line 44.

As described above, in the present embodiment, the absorption and storage efficiency of the surplus gas can be enhanced by using the cold heat of the evaporated gas transmitted from the liquefied gas storage tank 40 toward the consumer 100, It is possible to lower the load of the compressor 41 by cooling the evaporated gas using the excess gas to be discharged.

4 is a conceptual diagram of a gas processing system according to a fourth embodiment of the present invention.

Referring to FIG. 4, the gas processing system 1 according to the fourth embodiment of the present invention includes an evaporation gas storage tank 70 and an evaporation gas heat exchanger 71.

This embodiment is characterized in that the bunkering vessel and the gas propulsion vessel are connected to each other for bunkering so that the bunkering in which the liquefied gas is supplied from the bunkering tank 60 provided in the bunker vessel to the liquefied gas storage tank 40 provided in the gas propulsion vessel It is noted that the gas treatment system 1 of the present embodiment can be installed in a bunker vessel and / or a gas propulsion vessel.

The evaporation gas storage tank 70 stores the evaporation gas generated from the liquefied gas storage tank 40 to which the liquefied gas is supplied during bunkering. In the bunkering process, a large amount of evaporation gas is generated in the liquefied gas storage tank 40 due to natural vaporization.

In the conventional case, the evaporated gas generated in the liquefied gas storage tank 40 is burned and processed for the gas-fired unit (GCU), resulting in waste of the evaporated gas. It is possible to store and use it for future use, thereby realizing an environmentally friendly and highly efficient bunkering.

At this time, the evaporation gas storage tank 70 can adsorb and store the evaporation gas using the adsorbent. The storage using the adsorbent is the same as that described above in the gas storage tank 10 or the like, and therefore, a detailed description thereof will be omitted. As described above, if the temperature of the evaporation gas supplied to the evaporation gas storage tank 70 is low, it can be adsorbed more to the adsorbent. Therefore, if the temperature is low, the storage capacity of the evaporation gas storage tank 70 can be increased.

In the present embodiment, the vaporized gas recovery line 47 is connected to the bunkering tank 60 in the liquefied gas storage tank 40 for recovery of the vaporized gas, and the vaporized gas recovery line 47 is connected to the bunkering vessel or gas- The evaporation gas supply line 43 is connected to the provided engine 100 so that at least a part of the evaporation gas generated during bunkering can be recovered to the bunkering tank 60 of the bunker vessel or supplied to the engine 100 have.

However, unlike the present embodiment, since the evaporation gas generated during the bunkering process is so large, if the evaporation gas must be processed only by returning to the bunkering tank 60 or by operating the engine 100, It can not be digested and incineration of the evaporation gas may be caused.

However, in this embodiment, in addition to supplying the evaporation gas generated during bunkering to the bunkering tank 60 or the engine 100, the evaporation gas can be adsorbed and stored in the evaporation gas storage tank 70 using the adsorbent, The incineration can be suppressed and environmental pollution can be prevented, and the cost can be saved by omitting the installation of the gas combustion device.

The evaporation gas storage tank 70 is connected to an evaporation gas transfer line 471 branching from the evaporation gas recovery line 47 to be evaporated along with the evaporation gas recovery line 47, At least a part of the gas can be adsorbed to the adsorbent.

The evaporated gas recovery line 47 or the evaporated gas delivery line 471 may be provided with a compressor 41 for compressing the evaporated gas discharged from the liquefied gas storage tank 40, It is possible to control the pressure for compressing the evaporation gas according to the amount of the refrigerant.

In order to sufficiently adsorb and store the evaporation gas, it is preferable to increase the pressure of the evaporation gas and lower the temperature. For this purpose, in this embodiment, the evaporation gas is compressed to 5 to 30 bar, for example, (70). In this case, the evaporative gas storage tank 70 can store a large amount of evaporative gas as compared with the Type C compressed storage tank. Further, in this embodiment, the evaporation gas storage amount can be increased by cooling the evaporation gas by utilizing the evaporation gas heat exchanger 71, which will be described below.

The evaporation gas heat exchanger (71) cools the evaporation gas delivered to the evaporation gas storage tank (70) by using liquefied gas. The liquefied gas may be a liquefied gas supplied from bunkering tank 60 to liquefied gas storage tank 40 during bunkering.

The evaporation gas heat exchanger 71 may be provided on the bunkering line 61 provided with the bunkering valve 611 or the like and may be provided with a 2-stream type in which the evaporation gas transmission line 471 and the bunkering line 61 are connected Lt; / RTI > The evaporated gas flowing into the evaporated gas storage tank 70 through the evaporated gas transmission line 471 can be cooled by the liquefied gas flowing into the liquefied gas storage tank 40 through the bunkering line 61. [

The present embodiment can cool the spontaneously vaporized gas by the liquefied gas and transfer it to the vaporized gas storage tank 70, thereby increasing the storage efficiency of the vaporized gas in the vaporized gas storage tank 70 using the sorbed material.

The bypass line 62 may be provided in the bunkering line 61 where the evaporation gas heat exchanger 71 is provided to bypass the evaporation gas heat exchanger 71 and the bypass line 62 may be provided with a bypass valve (621) may be provided.

At this time, the bypass valve 621 is connected to the evaporation gas sensor 472 in cooperation with the evaporation gas sensor 472 for measuring the temperature of the evaporation gas, provided on the evaporation gas collection line 47, the evaporation gas transmission line 471, The opening degree can be adjusted according to the temperature of the evaporation gas measured by the evaporation gas.

If the temperature of the vaporized gas that is spontaneously vaporized and discharged from the liquefied gas storage tank 40 is not high (less than a predetermined value), the present embodiment increases the opening degree of the bypass valve 621 to heat exchange the liquefied gas with the vaporized gas The liquefied gas supplied from the bunkering tank 60 to the liquefied gas storage tank 40 can be prevented from being unnecessarily heated.

On the other hand, if the temperature of the evaporation gas delivered to the evaporation gas storage tank 70 is too high (above a predetermined value) to affect the adsorption storage, the present embodiment can prevent all or most of the liquefied gas from flowing into the evaporation gas heat exchanger To be used for cooling the evaporation gas in the evaporator 71.

The adjustment of the opening degree of the bypass valve 621 and the operation of the compressor 41 can be performed by controlling the opening degree of the bypass valve 621, The amount and pressure of the evaporation gas currently stored in the tank 70, and the temperature of the evaporation gas discharged through the evaporation gas recovery line 47, and the like.

For example, if the temperature of the evaporated gas discharged from the liquefied gas storage tank 40 is high, the present embodiment increases the operation of the compressor 41 and increases the opening of the bypass valve 621, So that the adsorption storage amount can be increased. In this case, since the temperature rise of the liquefied gas delivered to the liquefied gas storage tank 40 is suppressed, the discharge of the evaporated gas is also suppressed, so that the surplus evaporated gas can be efficiently stored in the evaporated gas storage tank 70.

That is, considering that the temperature in the case where the liquefied gas is heat-exchanged with the evaporated gas in the evaporated gas heat exchanger 71 may cause the natural vaporized evaporated gas to be generated in the liquefied gas storage tank 40 The opening of the compressor 41 and / or the bypass valve 621 can be appropriately adjusted in consideration of the internal temperature and the internal pressure of the liquefied gas storage tank 40, and the like.

As described above, this embodiment can adsorb and store evaporative gas generated during bunkering, thereby solving the problem of incineration of the surplus evaporative gas, and realizing environmentally friendly and highly efficient bunkering.

In addition to the embodiments described above, the present invention encompasses all embodiments that occur by combination of at least any one embodiment and known technology, or a combination of at least two embodiments, and the like.

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: gas storage tank
11: compressor 12: heater
13: gas supply line 14: gas discharge line
15: Gas combustion device 16: Gas discharge valve
20: heat transfer part 21: heat recovery part
22: heat transfer line 30: oil storage tank
31: Oil supply line 40: Liquefied gas storage tank
41: compressor 42: cooler
43: Evaporative gas supply line 431: Evaporative gas discharge line
432: Evaporative gas combustion device 433: Evaporative gas discharge valve
44: evaporation gas bypass line 45: liquefied gas supply line
46: vaporizer 47: evaporative gas recovery line
471: Evaporative gas delivery line 472: Evaporative gas sensor
50: Surplus gas storage tank 51: Surplus gas storage line
52: Inflow heat exchanger 53: Surplus gas transmission line
54: exhaust side heat exchanger 55: surplus gas discharge line
56: surplus gas combustion device 57: surplus gas discharge valve
60: bunkering tank 61: bunkering line
611: bunkering valve 62: bypass line
621: Bypass valve 70: Evaporative gas storage tank
71: Evaporative gas heat exchanger 100: Demand source, engine

Claims (8)

An evaporation gas storage tank for storing evaporation gas generated from a liquefied gas storage tank to which liquefied gas is supplied during bunkering; And
And an evaporation gas heat exchanger for cooling the evaporation gas delivered to the evaporation gas storage tank using a liquefied gas supplied at the time of bunkering,
The evaporation gas storage tank may include:
And adsorbing and storing the evaporation gas using an adsorbent. The method according to claim 1,
Further comprising a bunchering line connected from the bunkering tank to the liquefied gas storage tank for bunkering,
Wherein the vaporizing gas heat exchanger is provided on the bunkering line. 3. The method of claim 2,
Further comprising a bypass line arranged to bypass the evaporation gas heat exchanger in the bunkering line. The method of claim 3,
An evaporative gas recovery line connected from the liquefied gas storage tank to the bunkering tank for recovering evaporative gas; And
And an evaporative gas delivery line branched from the evaporative gas recovery line and connected to the evaporative gas storage tank. 5. The method of claim 4,
An evaporation gas sensor provided on the evaporation gas recovery line or the evaporation gas transmission line to measure the temperature of the evaporation gas; And
Further comprising a bypass valve provided in the bypass line,
Wherein the bypass valve adjusts the opening degree according to the temperature of the evaporation gas measured by the evaporation gas sensor. 5. The method of claim 4,
Further comprising a compressor provided in the evaporative gas recovery line or the evaporative gas delivery line for compressing the evaporated gas discharged from the liquefied gas storage tank. 7. The compressor according to claim 6,
And controls the pressure for compressing the evaporation gas according to the storage amount of the evaporation gas storage tank. A ship having the gas treatment system of any one of claims 1 to 7.

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