KR101941357B1 - A Regasification System Of Gas and Vessel having the same - Google Patents

Abstract

The gas regeneration system according to the present invention comprises: a regeneration device for regenerating liquefied gas stored in a liquefied gas storage tank and supplying it to a first customer; A main evaporative gas compressor for compressing the evaporated gas generated in the liquefied gas storage tank to a low pressure and supplying the compressed gas to a second customer; And an auxiliary evaporative gas compressor for compressing the evaporated gas generated from the liquefied gas storage tank to a high pressure and supplying the compressed gas to the first customer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas regeneration system and a vessel including the same,

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

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 less under 1 atm of the main component. The volume of liquefied methane is about 1/600 of the volume of methane in a gaseous state in a standard state, Is 0.42, which is about one half of the specific gravity of crude oil.

LNG is liquefied with ease of transportation and used after vaporizing at the place of use after transportation. However, due to the risk of natural disasters and terrorism, it is feared to install LNG vaporization equipment onshore.

As a result, in place of the conventional liquefied natural gas regeneration system installed on the land, a system for supplying natural gas that is vaporized on the land by installing a regeneration device on an LNG carrier carrying the liquefied natural gas Is in the spotlight.

In the LNG regasification system, the LNG stored in the liquefied gas storage tank is pressurized by the booster pump and sent to the LNG vaporizer, which is vaporized by the LNG vaporizer and sent to the onshore consumer. Here, the liquefied gas stored in the liquefied gas storage tank has a very large amount, and the generated evaporation gas is also very large.

Therefore, various techniques for efficiently treating such evaporated gas in the LNG regasification system have been studied.

SUMMARY OF THE INVENTION The present invention has been made to improve the conventional art, and it is an object of the present invention to provide a gas regeneration system and a ship including the same, which can optimize the processing efficiency of the evaporation gas.

In the gas regeneration system according to the present invention, the gas regeneration system according to the present invention includes: a regeneration device for regenerating the liquefied gas stored in the liquefied gas storage tank and supplying it to a first customer; A main evaporative gas compressor for compressing the evaporated gas generated in the liquefied gas storage tank to a low pressure and supplying the compressed gas to a second customer; And an auxiliary evaporative gas compressor for compressing the evaporated gas generated from the liquefied gas storage tank to a high pressure and supplying the compressed gas to the first customer.

Specifically, the auxiliary evaporative gas compressor may be a standard high pressure compressor.

Specifically, the auxiliary evaporative gas compressor includes a constituent compressor in which four or five stages of pistons are connected in series, and four constituent compressors may be provided and connected to each other in parallel.

Specifically, the auxiliary evaporative gas compressor includes a minimum send-out compressor (MSO Compressor) for processing the evaporated gas generated in the liquefied gas storage tank to supply the compressed gas to the first customer when the regenerator is not driven ).

Specifically, the evaporation gas supply line connects the liquefied gas storage tank and the second demand point. And an evaporative gas branch line connecting said evaporative gas supply line and said first consumer, said auxiliary evaporative gas compressor comprising an auxiliary evaporative gas compressor, said evaporative gas branch line being connected to said main evaporative gas compressor And can branch downstream to connect the first consumer.

Specifically, the main evaporative gas compressor compresses the evaporative gas generated in the liquefied gas storage tank, supplies the evaporative gas to the second consumer, and lanes the compressed gas to the auxiliary evaporative gas compressor.

Specifically, the evaporation gas supply line connects the liquefied gas storage tank and the second demand point. And an evaporative gas branch line connecting said evaporative gas supply line and said first consumer, said auxiliary evaporative gas compressor comprising an auxiliary evaporative gas compressor, said evaporative gas branch line being connected to said main evaporative gas compressor And can branch at the upstream to connect the first customer.

The auxiliary evaporative gas compressor may further include a pre-heater disposed upstream of the auxiliary evaporative gas compressor on the evaporative gas branch line and preheating the evaporative gas supplied to the auxiliary evaporative gas compressor.

Specifically, the auxiliary evaporative gas compressor may process the evaporative gas generated in the liquefied gas storage tank to supply the compressed gas to the first customer when the regenerator is not driven.

Specifically, the first customer is a terrestrial terminal, and the second customer may be a low-pressure gas injection engine.

Specifically, the auxiliary evaporative gas compressor may be a room temperature compressor.

Specifically, the auxiliary evaporative gas compressor can compress the evaporative gas discharged from the main evaporative gas compressor up to 90 bar to 100 bar.

Specifically, the liquefied gas storage tank may further include a liquefied gas supply line connecting the liquefied gas storage tank and the first demander, and having the regeneration device.

Specifically, the regeneration device comprises: a feeding pump provided on the liquefied gas supply line and supplying the liquefied gas stored in the liquefied gas storage tank to the first customer; A suction drum provided on the liquefied gas supply line for temporarily storing liquefied gas supplied from the feeding pump; A boosting pump provided on the liquefied gas supply line for pressurizing the liquefied gas supplied from the suction drum to a high pressure; And a carburetor provided on the liquefied gas supply line and regenerating the liquefied gas supplied from the boosting pump to supply the liquefied gas to the first customer.

Specifically, it may be a vessel characterized by including the gas regeneration system.

The gas regeneration system according to the present invention and the ship including the same have the effect of maximizing the treatment efficiency of the evaporation gas.

1 is a conceptual view of a ship having a gas regeneration system.
2 is a conceptual diagram of a gas regeneration system according to the first embodiment of the present invention.
3 is a conceptual diagram of a gas regeneration system according to a second embodiment of the present invention.
4 is a conceptual diagram of a gas regeneration system according to a third 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 used to encompass all gaseous fuels generally stored in a liquid state, such as LNG or LPG, ethylene, ammonia, etc. In the case where the gas is not in a liquid state by heating or pressurization, . This also applies to the evaporative gas. In addition, LNG can be used to encompass both NG (natural gas), which is a liquid state, and NG, which is a supercritical state for the sake of convenience. The LNG may be used to mean not only a gas state evaporation gas but also a liquefied evaporation gas .

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

1 is a conceptual view of a ship having a gas regeneration system.

1, a ship 1 equipped with a gas regeneration system includes a liquefied gas storage tank 10, a feeding pump 20, a boosting pump 21, a suction drum 30, a vaporizer (not shown) 40, a main evaporative gas compressor 50, a first demand site 61, and a second demand site 62.

Here, the ship 1 equipped with the gas regeneration system has a hull H composed of a forward portion (not shown), a stern portion (not shown), and an upper deck (not shown) The propeller shaft S is propelled by operating the propeller shaft S by transmitting the power produced by the engine E of the engine room (not shown) disposed therein.

In order to enable the liquefied gas to be regenerated at sea and to supply the liquefied gas to the land terminal, the ship 1 is equipped with a liquefied gas regeneration vessel (LNG RV ) Or a floating liquefied gas storage and regasification facility (FSRU).

Hereinafter, a ship 1 having a conventional gas regeneration system will be described with reference to FIG.

The vessel 1 having the conventional gas regeneration system is configured such that the liquefied gas in the liquid state is taken out from the liquefied gas storage tank 10 through the feeding pump 20 and is supplied to the boosting pump 21 via the suction drum 30 The liquefied gas is heated and regenerated in the vaporizer 41 and the trim heater 42 of the vaporizing unit 40 through a heat source and supplied to the first consumer 61. [

That is, in brief, the conventional gas regeneration system regenerates the liquefied gas by using the gasification unit 40 and supplies it to the first customer 61.

At this time, the evaporated gas generated in the liquefied gas storage tank 10 is usually pressurized by the main evaporative gas compressor 50 and supplied to the second customer 62 for processing.

In such a conventional gas regeneration system, when the regeneration does not proceed, the gas amount required by the first demand point 61 can not be met and the liquefied gas processing apparatus that is processed in the first demand point 61 is stopped.

In this case, in order to reactivate the liquefied gas processing device of the first consumer 61, it is required to undergo cooldown to consume energy, and if the first consumer 61 is directly supplied to the consumer, There are many operational problems that can result in severe damages.

The inventors of the present invention invented the gas regeneration system (2, 3, 4) according to the embodiment of the present invention shown in FIG. 2 to FIG. 4 to solve the above problems, and will be described in detail below.

2 is a conceptual diagram of a gas regeneration system according to the first embodiment of the present invention.

2, the gas regeneration system 2 according to the first embodiment of the present invention includes a liquefied gas storage tank 10, a feeding pump 20, a boosting pump 21, a suction drum 30 A gasification unit 40, a main evaporative gas compressor 50, a first customer 61, a second customer 62, and an auxiliary evaporative gas compressor 70b. Here, it goes without saying that the gas regeneration system 2 according to the first embodiment of the present invention can be constructed in the vessel 1 shown in Fig.

Hereinafter, a gas regeneration system 2 according to an embodiment of the present invention will be described with reference to FIG.

Prior to describing the individual configurations of the gas regeneration system 2 according to the first embodiment of the present invention, the basic flow paths for organically connecting the individual configurations will be described. Here, the passage is a passage through which the fluid flows, and may be a line. However, the present invention is not limited thereto.

In the embodiment of the present invention, the liquefied gas first supply line L1, the liquefied gas second supply line L2, the evaporation gas supply line L3, and the evaporation gas branch line L4a may be further included. Valves (not shown), which are adjustable in opening degree, may be installed in each line, and the supply amount of the evaporation gas or liquefied gas may be controlled according to the opening degree of each valve.

The liquefied gas first supply line L1 connects the liquefied gas storage tank 10 and the suction drum 30 and has a feeding pump 20 to supply the liquefied gas stored in the liquefied gas storage tank 10 to the feeding pump 10, To the suction drum (30) through the suction port (20). At this time, the liquefied gas first supply line L1 may be connected to the suction drum 30 and may be branched at the upstream of the suction drum 30 and directly connected to the liquefied gas second supply line L2.

The liquefied gas second supply line L2 is connected to the suction drum 30 and the first consumer 61 and has a booster pump 21 and a vaporizer 40 so that the liquefied gas is supplied to the suction drum 30, The liquefied gas directly supplied from the gas or liquefied gas first supply line L 1 can be pressurized by the booster pump 21 and regenerated by the gasification unit 40 to be supplied to the first customer 61.

The evaporation gas supply line L3 connects the liquefied gas storage tank 10 and the second customer 62 and has the main evaporative gas compressor 50 to supply the evaporated gas generated from the liquefied gas storage tank 10 Can be supplied to the second customer site 62 by way of the main evaporative gas compressor 50.

The evaporation gas branch line L4a is branched at the upstream of the main evaporative gas compressor 50 on the evaporation gas supply line L3 and is connected to the evaporation unit 40 on the liquefied gas second supply line L2 and the evaporator 61, and may include a secondary evaporative gas compressor 70b. Of course, the evaporation gas branch line L4a can be directly connected to the first customer 61. [

The evaporation gas branch line L4a can pressurize the evaporation gas generated in the liquefied gas storage tank 10 to a high pressure and supply it to the first consumer.

The additional vaporized gas branch line L5 is branched at the intermediate stage of the auxiliary evaporative gas compressor 70b and is connected downstream of the main evaporative gas compressor 50 on the evaporative gas supply line L3, 70b to supply the evaporated gas branched at the low pressure to the second customer.

Hereinafter, the individual configurations that are organically formed by the above-described respective lines L1 to L5 to implement the gas regeneration system 2 will be described.

The liquefied gas storage tank 10 stores liquefied gas to be supplied to the first customer 61. 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 have the form of a pressure tank.

Here, the liquefied gas storage tank 10 is disposed inside the hull H, and four liquefied gas storage tanks 10 may be formed in front of the engine room. In addition, the liquefied gas storage tank 10 is not particularly limited to various types such as a membrane-type tank or an independent tank, for example.

The feeding pump 20 is provided on the liquefied gas first supply line L1 and is provided inside or outside the liquefied gas storage tank 10 to supply the liquefied gas stored in the liquefied gas storage tank 10 to the suction drum 30).

Specifically, the feeding pump 20 is provided between the liquefied gas storage tank 10 and the suction drum 30 on the liquefied gas first supply line L 1 to store the liquefied gas stored in the liquefied gas storage tank 10 And can be firstly pressurized and supplied to the suction drum 30.

The feeding pump 20 can pressurize the liquefied gas stored in the liquefied gas storage tank 10 to 6 to 8 bar and supply it to the suction drum 30. [ Here, the feeding pump 20 may pressurize the liquefied gas discharged from the liquefied gas storage tank 10 so that the pressure and the temperature may be somewhat higher, and the pressurized liquefied gas may still be in a liquid state.

In this case, the feeding pump 20 may be a submergible pump when it is provided inside the liquefied gas storage tank 10 and may be a pump that is stored in the liquefied gas storage tank 10 when it is installed outside the liquefied gas storage tank 10. May be provided at a position inside the hull (H) lower than the level of the liquefied gas and may be a centrifugal pump.

The boosting pump 21 may be provided between the suction drum 30 and the evaporator 40 on the liquefied gas second supply line L2 and may be provided between the liquefied gas supplied from the feeding pump 20 or the suction drum 30 may be supplied to the vaporization unit 40 by pressurizing the liquefied gas at 80 to 120 bar.

The boosting pump 21 can pressurize the liquefied gas in accordance with the pressure demanded by the first customer 61 and can be constituted by a centrifugal pump.

The suction drum 30 is connected to the liquefied gas first supply line L1 and can receive the liquefied gas from the liquefied gas storage tank 10 and temporarily store the liquefied gas.

Specifically, the suction drum 30 can receive the liquefied gas stored in the liquefied gas storage tank 10 from the feeding pump 20 through the liquefied gas first supply line L1, The liquefied gas can be separated into a liquid phase and a vapor phase by storage, and the separated liquid phase can be supplied to the boosting pump 21.

That is, the suction drum 30 temporarily stores the liquefied gas to separate the liquid phase and the vapor phase, and supplies the complete liquid phase to the boosting pump 21 so that the boosting pump 21 satisfies the effective suction head NPSH , Thereby preventing cavitation in the boosting pump (21).

The vaporizing section 40 is provided on the liquefied gas second supply line L2 to regenerate the high-pressure liquefied gas discharged from the booster pump 21.

Specifically, the vaporizer 40 is provided on the liquefied gas second supply line L2 between the first customer 61 and the booster pump 21 and is constituted by the vaporizer 41 and the heater 42, The high-pressure liquefied gas supplied from the pump 21 can be vaporized through the vaporizer 41 and then heated to the desired temperature by the first customer 61 through the heater 42 and supplied to the first customer 61.

The main evaporative gas compressor (50) can pressurize the evaporated gas generated in the liquefied gas storage tank (10) to a low pressure and supply it to the second customer (62). Here, the main evaporative gas compressor 50 may be a low duty compressor (LD Compressor).

Specifically, the main evaporative gas compressor 50 is provided on the evaporative gas supply line L3 to pressurize the evaporative gas generated in the liquefied gas storage tank 10 to about 6 to 15 bar to be supplied to the second consumer 62 Can supply.

A plurality of main evaporative gas compressors 50 may be provided to pressurize the evaporation gas at multiple stages. For example, three main evaporation gas compressors 50 may be provided to pressurize the evaporation gas at three stages. The example three-stage compressor is only one example and is not limited to the three stages.

In an embodiment of the present invention, an evaporative gas cooler (not shown) may be provided at each rear end of the main evaporative gas compressor 50. When the evaporation gas is pressurized by the main evaporative gas compressor 50, the temperature may also rise in accordance with the pressure increase. Therefore, in this embodiment, the evaporation gas cooler can be used to lower the temperature of the evaporation gas again. The evaporative gas cooler may be installed in the same number as each end of the main evaporative gas compressor 50 and the evaporative gas cooler may be provided downstream of each end of the main evaporative gas compressor 50.

Further, in the embodiment of the present invention, when the main evaporative gas compressor 50 is provided in parallel to increase the amount of the evaporative gas generated in the liquefied gas storage tank 10, When one of the gas compressors 50 malfunctions or shut down, the other main evaporative gas compressor 50 can be operated to efficiently receive the evaporative gas generated in the liquefied gas storage tank 10 .

The first consumer 61 can supply and consume the liquefied gas vaporized by the vaporizing unit 40 or can supply and discharge the evaporated gas compressed by the auxiliary evaporating gas compressor 70b.

Here, the first customer 61 may be a land terminal installed on the land, or a marine terminal floated on the sea, by vaporizing the liquefied gas and supplying and using the gaseous liquefied gas.

The second customer 62 uses the evaporated gas generated from the liquefied gas storage tank 10 as a fuel. That is, the second customer 62 needs evaporation gas and can be driven using the gas as a raw material. The second customer 62 may be, but is not limited to, a generator (e.g., DFDG), a gas-fired unit (GCU), a boiler (e.g.

Specifically, the second customer 62 is connected to the evaporation gas supply line L3 to receive the evaporation gas, and the evaporation gas compressed by the main evaporation gas compressor 50 at a low pressure of about 1 to 6 bar (maximum 15 bar) And can be used as fuel.

In addition, the second customer 62 may be a heterogeneous fuel engine capable of using a heterogeneous fuel, so that not only evaporation gas but also oil can be used as the fuel. However, when the evaporation gas and the oil are not mixed and supplied, As shown in FIG. This is to prevent the mixture of two materials having different combustion temperatures from being mixed, thereby preventing the efficiency of the second customer 62 from deteriorating.

Here, the second customer 62 may be provided on a deck (not shown) of the engine room provided inside the stern section.

The auxiliary evaporative gas compressor 70b receives the evaporated gas generated in the liquefied gas storage tank 10 and compresses it to a high pressure to supply it to the first demand site 61. [

Specifically, the auxiliary evaporative gas compressor 70b compresses the evaporative gas generated in the liquefied gas storage tank 10 to 90 to 100 bar and supplies the evaporated gas to the first consumer 61 through the evaporative gas branch line L4a .

The auxiliary evaporative gas compressor 70b compresses the evaporation gas generated in the liquefied gas storage tank 10 to 6 bar to 15 bar and supplies it to the second demand point 62, respectively.

The auxiliary evaporative gas compressor 70b regenerates the liquefied gas stored in the liquefied gas storage tank 10 through the apparatus such as the regenerator (the feeding pump 20, the boosting pump 21, the evaporator 40, etc.) The apparatus for supplying the gas to the first customer 61) is not driven, the evaporating gas generated in the liquefied gas storage tank 10 may be compressed and supplied to the first customer 61. For example, the auxiliary evaporative gas compressor 70b may be a Minimum Send-Out Compressor (MDO Compressor).

In addition, the auxiliary evaporative gas compressor 70b can further reduce the amount of the evaporative gas generated in the liquefied gas storage tank 10 even when the excess evaporative gas is generated due to excessive amount of the evaporative gas supplied to the second customer 62 It is possible to process the compressed data to be supplied to the first customer 61.

As described above, in the embodiment of the present invention, since the regeneration does not proceed and the amount of gas required by the first customer 61 can not be satisfied, even if the liquefied gas processing apparatus to be processed in the first customer 61 is stopped, It is possible to supply the evaporated gas generated in the liquefied gas storage tank 10 to the first customer 61 and to process the same so that the supply reliability of the regeneration processing system is improved and the energy is optimally used The energy consumption can be remarkably reduced.

As described above, the ship 1 having the gas regeneration system 2 according to the present invention has the effect of maximizing the regeneration efficiency of the liquefied gas.

3 is a conceptual diagram of a gas regeneration system according to a second embodiment of the present invention.

3, the gas regeneration system 3 according to the second embodiment of the present invention includes a liquefied gas storage tank 10, a feeding pump 20, a boosting pump 21, a suction drum 30 A gasification unit 40, a main evaporative gas compressor 50, a first customer 61, a second customer 62, an auxiliary evaporative gas compressor 70b, and a preheater 80. Here, it goes without saying that the gas regeneration system 3 according to the second embodiment of the present invention can be constructed in the vessel 1 shown in Fig.

The gas regeneration system 3 according to the second embodiment of the present invention is characterized in that in the gas regeneration system 2 according to the first embodiment of the present invention shown in Fig. 2, the auxiliary evaporation gas compressor 70b and the pre- (80), the same reference numerals are used for convenience of description and the like, but they are not necessarily denoted by the same reference numerals.

Hereinafter, a gas regeneration system 3 according to a second embodiment of the present invention will be described with reference to FIG.

In the embodiment of the present invention, the kind of the gas regeneration system 2 according to the first embodiment and the subsidiary evaporative gas compressor 70b thereof are different from the standard high pressure (MDO) compressor in the Minimum Send-Out Compressor (MDO Compressor) (Standard High Pressure Compressor (SHP) compressor), and all other configurations may be the same or similar.

The auxiliary evaporative gas compressor 70b receives the evaporated gas generated from the liquefied gas storage tank 10 and compresses it to a high pressure and supplies it to the first demand site 61. [

The auxiliary evaporative gas compressor 70b may be a standard high pressure compressor (SHP compressor), and the standard high pressure compressor may be formed such that the cylinder is formed in a V shape so that the size of the compressor itself is considerably reduced, It is possible to drastically reduce the space occupied by the display device.

The auxiliary evaporative gas compressor 70b may comprise constituent compressors which are first to fourth compressors 71 to 74 as standard high pressure compressors.

The first to fourth compressors 71 to 74 pressurize the evaporated gas generated in the liquefied gas storage tank 10 and supply the pressurized gas to the first and second consumers 61 and 62. The evaporated gas branch line L4a, Respectively.

The first to fourth compressors 71 to 74 are connected in series with a plurality of stages (pistons), respectively, so that the evaporation gas can be multi-stage pressurized.

For example, the first to fourth compressors 71 to 74 have a structure in which four or five pistons are connected in series, that is, connected in series at four or five stages, and at the final stage, 100 bar and can be discharged and supplied to the first customer 61.

The first to fourth compressors 71 to 74 may be equipped with evaporative gas coolers (not shown) between their respective stages. When the evaporation gas is pressurized by the first to fourth compressors 71 to 74, the temperature can also be raised in accordance with the pressure increase. Therefore, in this embodiment, the evaporation gas cooler can be used to lower the temperature of the evaporation gas have. The evaporative gas cooler may be installed in the same number as each stage of the first to fourth compressors 71 to 74 and each evaporative gas cooler may be provided downstream of each of the first to fourth compressors 71 to 74 have.

In addition, the first to fourth compressors 71 to 74 may be a room-temperature evaporative gas compressor in which the temperature of the evaporated gas sucked in the first stage is minus 40 degrees to minus 20 degrees. To this end, a preheater 80, which is a separate heating device, is required in front of the first to fourth compressors 71 to 74.

The preheater 80 can increase the temperature of the evaporation gas of approximately -10 0 degree generated in the liquefied gas storage tank 10 from -40 degrees to -20 degrees to the first to fourth compressors 71 to 74 .

The evaporation gas addition branch line L5 branches from the first stage to the second stage of the first to fourth compressors 71 to 74 on the evaporation gas supply line L1 and is connected to the second demander 62 .

Here, the evaporated gas discharged from the first end of the first to fourth compressors 71 to 74 can be compressed at a low pressure of 4 bar to 6 bar and can be supplied to the second demander 72.

As described above, in the embodiment of the present invention, by using the auxiliary evaporative gas compressor 70b as a standard high-pressure compressor (SHP), the construction cost is reduced compared to the minimum send-out compressor MSO-C in the first embodiment It is effective.

Further, in the embodiment of the present invention, the auxiliary evaporative gas compressor 70b is a standard high-pressure compressor (SHP), and stacking can be carried out in the construction of four parallel units, and the minimum send-out compressor MSO- ), It is possible to further improve the space saving.

The preheater 80 may be provided upstream of the auxiliary evaporative gas compressor 70b on the evaporative gas branch line L4a to preheat the evaporative gas generated in the liquefied gas storage tank 10 and supply it to the auxiliary evaporative gas compressor 70b ).

The preheater 80 can use various kinds of waste heat generated in the ship such as cooling water and exhaust gas of the engine as a heat source and can use high temperature steam supplied from a second customer 62 (for example, a boiler) In addition, a heat source can be secured through seawater.

Further, the preheater 80 may be supplied with a heat source from the heating medium used for supplying the heat source in the vaporizer 41 or the trim heater 42 of the regeneration apparatus. Wherein the heat carriers may be glycol water or propane.

As described above, the ship 1 having the gas regeneration system 3 according to the present invention has the effect of maximizing the regeneration efficiency of the liquefied gas.

4 is a conceptual diagram of a gas regeneration system according to a third embodiment of the present invention.

4, the gas regeneration system 4 according to the third embodiment of the present invention includes a liquefied gas storage tank 10, a feeding pump 20, a boosting pump 21, a suction drum 30 A gasification unit 40, a main evaporative gas compressor 50, a first customer 61, a second customer 62, and an auxiliary evaporative gas compressor 70b. Here, it is a matter of course that the gas regeneration system 4 according to the third embodiment of the present invention can be constructed in the vessel 1 shown in Fig.

A gas regeneration system 4 according to a third embodiment of the present invention comprises, in the gas regeneration system 2, 3 according to the first and second embodiments of the present invention shown in Figs. 2 and 3, The evaporation gas compressor 70b and the evaporation gas branch line 4b, the same reference numerals are used for the same components as those of the components other than the evaporation gas compressor 70b and the evaporation gas branching line 4b.

Hereinafter, a gas regeneration system 4 according to a third embodiment of the present invention will be described with reference to FIG.

In the embodiment of the present invention, the position of the auxiliary evaporative gas compressor 70b in the gas regeneration system 3 according to the second embodiment is disposed downstream of the main evaporative gas compressor 50, and the evaporative gas branch line 4b, There is a difference that the connecting position of the evaporation gas addition branch line L5 is deleted, and the other configurations and arrangements may be the same or similar.

The evaporation gas branch line L4b is branched downstream of the main evaporative gas compressor 50 on the evaporation gas supply line L3 and is connected to the evaporation portion 40 on the liquefied gas second supply line L2 and the evaporator 61, and may include a secondary evaporative gas compressor 70b. Of course, the evaporation gas branch line L4b may be directly connected to the first demand point 61. [

The evaporation gas branch line L4b may further supply the evaporated gas compressed by the main evaporative gas compressor 50 to the first demander 61 by the auxiliary evaporative gas compressor 70b.

The main evaporative gas compressor 50 compresses the evaporated gas generated from the liquefied gas storage tank 10 to a low pressure and supplies the compressed refrigerant to the second customer 62 first and then to the auxiliary evaporative gas compressor 70b.

That is, the main evaporative gas compressor 50 regenerates the liquefied gas stored in the liquefied gas storage tank 10 through the apparatus such as the regeneration apparatus (the feeding pump 20, the boosting pump 21, and the gasification unit 40) The refrigerant is supplied to the second customer 62 and the liquefied gas is supplied to the auxiliary evaporative gas compressor 70b.

Accordingly, the gas regeneration system 4 according to the embodiment of the present invention can always supply a constant amount of the evaporation gas to the second customer 62 regardless of whether the regeneration apparatus is operated or not, The driving reliability of the evaporator 62 can be improved and the evaporator can be supplied not only to the second consumer 62 but also to the first consumer 61,

In the gas regeneration system (2, 3) according to the first and second embodiments of the present invention, the auxiliary evaporative gas compressors (70a, 70b) are additionally operated for the treatment of the evaporative gas when the regeneration does not progress The evaporated gas generated in the liquefied gas storage tank 10 is compressed by the auxiliary evaporative gas compressors 70a and 70b and supplied to the first customer 61 through the evaporative gas branch line L4a, Branched at the intermediate stage of the gas compressors 70a and 70b and supplied to the second customer 62 by the additional gas branch line L5.

As a result, the gas regeneration system (2, 3) according to the first and second embodiments of the present invention, in addition to the main evaporative gas compressor (50), for the treatment of the evaporative gas, The gas compressors 70a and 70b are driven.

As a result, in addition to the evaporative gas compression in the main evaporative gas compressor 50, redundant evaporative gas compression in the auxiliary evaporative gas compressors 70a and 70b occurs, and the sizes of the auxiliary evaporative gas compressors 70a and 70b are increased Thereby increasing the construction cost and causing unnecessary compression.

In order to solve this problem, in the third embodiment of the present invention, the auxiliary evaporative gas compressor 70b is disposed downstream of the main evaporative gas compressor 50 to solve the above problem.

Specifically, the auxiliary evaporative gas compressor 70b further compresses at least a portion of the evaporative gas compressed at the low pressure in the main evaporative gas compressor 50, and supplies the compressed gas to the first consumer 61.

More specifically, the auxiliary evaporative gas compressor 70b can further compress the evaporative gas of 6 to 15 bar discharged from the main evaporative gas compressor 50 to 90 to 100 bar, 61).

The auxiliary evaporative gas compressor 70a (shown in Fig. 2, 70b in Fig. 3) in the first and second embodiments is connected to the second demand source The construction of the additional line L5 is required and the construction cost is increased and two roots of the evaporation gas supplied to the second customer 62 are constructed to generate a pressure deviation The driving efficiency of the second customer 62 is lowered.

On the other hand, in the auxiliary evaporative gas compressor 70b according to the third embodiment of the present invention, in the design for the treatment of the evaporative gas of the gas regeneration system 4, only the main evaporative gas compressor 50 is connected to the second consumers 62 And the auxiliary evaporative gas compressor 70b is designed to supply the evaporative gas only to the first customer 61, so that the construction of the additional line becomes unnecessary and the construction cost is reduced, (62) can be supplied with the evaporation gas only through a single route, so that the pressure difference of the supplied evaporation gas is not generated, so that the driving efficiency of the second customer (62) is increased.

The auxiliary evaporative gas compressor 70b may be a room temperature compressor. The compressor at room temperature requires that the temperature of the incoming evaporating gas be in the range of about minus 40 degrees to minus 20 degrees. The temperature of the evaporating gas generated in the liquefied gas storage tank 10 is about minus 100 degrees and very low Have.

Therefore, when the auxiliary evaporative gas compressor 70b according to the embodiment of the present invention is a room temperature compressor, the evaporation gas at room temperature (approximately 45 degrees or minus 20 degrees to minus 40 degrees) Can be supplied.

That is, since the evaporation gas of approximately -10 0 degree generated in the liquefied gas storage tank 10 is compressed by the main evaporation gas compressor 50, the temperature of the evaporation gas is approximately 45 degrees or minus 20 degrees to minus 40 degrees Roads will increase. Accordingly, since the auxiliary evaporative gas compressor 70b receives the compressed evaporative gas through the main evaporative gas compressor 50, the auxiliary evaporative gas compressor 70b can be used at room temperature, thereby reducing the construction cost.

The auxiliary evaporative gas compressor 70b may be, for example, a standard high pressure compressor (SHP compressor). Here, the standard high-pressure compressor (SHP compressor) can be formed such that the cylinder is formed in a V-shape and the size of the compressor itself is considerably reduced, thereby drastically reducing the space occupied by the compressor.

The auxiliary evaporative gas compressor 70b is a standard high pressure compressor and may include constituent compressors which are first to fourth compressors 71 to 74. The constituent compressors which are the first to fourth compressors 71 to 74 2 < / RTI > embodiment.

As described above, the ship 1 equipped with the gas regeneration system 4 according to the present invention has the effect of maximizing the regeneration efficiency of the liquefied gas.

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: vessels 2, 3, 4: gas regeneration system of the present invention
10: liquefied gas storage tank 20: feeding pump
21: boosting pump 30: suction drum
40: vaporizer 41: vaporizer
42: trim heater 50: main evaporative gas compressor
61: First Demand Side 62: Second Demand Side
70a, 70b: auxiliary evaporative gas compressor 71: first compressor
72: second compressor 73: third compressor
74: Fourth compressor 80: Preheater
L1: liquefied gas first supply line L2: liquefied gas second supply line
L3: Evaporative gas supply line L4a, L4b: Evaporative gas branch line
L5: Evaporative gas added branch line

Claims (15)

A regasification supply line connecting the liquefied gas storage tank and the land demand site and having a regeneration device;
An evaporation gas supply line connecting the liquefied gas storage tank and the customer of the ship and having a main evaporative gas compressor; And
And an evaporative gas bypass line connected to a front end of the main evaporative gas compressor and a rear end of the regenerator,
The evaporation gas bypass line
Wherein the regenerator bypasses the regenerator to supply evaporated gas generated in the liquefied gas storage tank to the land demand site when the regenerator is not actuated. The method according to claim 1,
Further comprising an auxiliary evaporative gas compressor provided on the evaporative gas bypass line for compressing the evaporative gas generated from the liquefied gas storage tank and supplying the evaporated gas to the land demand site. The secondary evaporative gas compressor according to claim 2,
Characterized in that a four-stage or five-stage piston is connected in series and four compressor compressors are provided and are connected in parallel with each other. The secondary evaporative gas compressor according to claim 2,
And a minimum send-out compressor (MSO Compressor) for compressing the evaporated gas generated in the liquefied gas storage tank and supplying the compressed gas to the onshore customer when the regenerator is not operated. The secondary evaporative gas compressor according to claim 2,
Wherein the compressor is a Standard High Pressure Compressor. The method according to claim 1,
The regeneration supply line is a liquefied gas supply line,
Wherein the evaporative gas bypass line is an evaporative gas branch line. delete 3. The method of claim 2,
Further comprising a preheater provided upstream of the auxiliary evaporative gas compressor on the evaporative gas bypass line for preheating the evaporative gas supplied to the auxiliary evaporative gas compressor. delete The method according to claim 1,
The land demand site is a terminal on the land,
Wherein the vessel consumer is a low pressure gas injection engine. delete The secondary evaporative gas compressor according to claim 2,
And compressing the evaporated gas discharged from the main evaporative gas compressor to 90 to 100 bar. delete 2. The apparatus of claim 1,
A feeding pump that is provided on the re-gasification supply line and supplies the liquefied gas stored in the liquefied gas storage tank to the land demand site;
A suction drum provided on the regeneration supply line for temporarily storing the liquefied gas supplied from the feeding pump;
A boosting pump provided on the regeneration supply line for pressurizing the liquefied gas supplied from the suction drum to a high pressure; And
And a vaporizer provided on the regasification supply line and regenerating the liquefied gas supplied from the boosting pump to supply the liquefied gas to the land demand site. Section 1 Characterized in that it comprises the gas regeneration system according to any one of claims 1 to 6, 8, 10, 12 and 14.

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