KR20150089335A - A Treatment System Of Liquefied Gas - Google Patents

Abstract

The present invention relates a treatment system of a liquefied gas which is characterized by comprising: an evaporated gas supply line connecting a liquefied gas storage tank and demand at least one evaporated gas compressor located on the evaporated supply line, compressing the evaporated gas; an evaporated gas cooler located on a back end of the evaporated gas compressor, cooling the compressed evaporated gas with a heat exchange medium; a liquefied gas supply line connecting the liquefied gas storage tank and the demand; a heat exchanger formed on the liquefied gas supply line, and heat exchanging the liquefied gas with the heat exchange medium; and a heat exchange medium circulation line connecting the evaporated gas cooler and the heat exchanger.

Description

Description of the Related Art A Treatment System Of Liquefied Gas

The present invention relates to a liquefied gas processing system.

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.

However, since the liquefied gas is kept in a liquefied state by increasing the pressure or lowering the temperature, it is important to secure the heat insulating property of the liquefied gas storage tank because the phase change due to external heat penetration is a concern. However, since the liquefied gas storage tank can not achieve perfect heat insulation, some of the liquefied gas stored in the liquefied gas storage tank is phase-changed into vapor gas, which is a gas, by heat transmitted from the outside.

When the internal pressure of the liquefied gas storage tank exceeds the pressure that can be tolerated by the liquefied gas storage tank, the liquefied gas storage tank The tank may be damaged.

Korean Published Patent Bulletin 2010-0061368 (2010.06.07)

An object of the present invention is to provide a liquefied gas processing system capable of increasing the energy efficiency of a system by implementing a heat source used for heating the liquefied gas and a cold source used for cooling the evaporated gas as one heat exchange medium .

It is also an object of the present invention to provide a liquefied gas processing system that can simplify the evaporative gas cooling configuration by supplying a heat exchange medium through one line to an evaporative gas cooler located downstream of the evaporative gas compressor.

It is another object of the present invention to provide an evaporative gas preheater for preheating evaporative gas before the evaporator gas is introduced into the compressor, so that a general compressor other than an ultra-low temperature compressor can be used, and a heat exchange medium So that the evaporating gas preheater preheats the evaporating gas and the heat exchanging medium is cooled so that the efficiency of cooling the evaporated gas compressed in the evaporating gas compressor can be increased.

According to an aspect of the present invention, there is provided a liquefied gas processing system comprising: an evaporation gas supply line connecting a liquefied gas storage tank and a customer; At least one evaporative gas compressor provided on the evaporative gas supply line and compressing the evaporative gas; At least one evaporative gas cooler positioned downstream of the evaporative gas compressor and cooling the pressurized evaporative gas with a heat exchange medium; A liquefied gas supply line connecting the liquefied gas storage tank and the demander; A heat exchanger provided on the liquefied gas supply line for exchanging heat with liquefied gas to the heat exchange medium; And a heat exchange medium circulation line connecting the evaporation gas cooler and the heat exchanger.

Specifically, the customer may be a low-pressure consumer who receives a low-pressure evaporative gas; And a high-pressure consumer supplied with a high-pressure evaporative gas, wherein the evaporative gas supply line is branched between the second and third stages of the evaporative gas compressor and connected to the low-pressure consumer, and the second- A low-pressure evaporation gas supply line for supplying pressurized evaporation gas to the low-pressure consumer; And a high-pressure evaporating gas supply line connecting the liquefied gas storage tank and the high-pressure consumer to supply the evaporated gas compressed by the evaporation gas compressor to the high-pressure consumer at a high pressure.

Specifically, the apparatus may further include a pump provided on the liquefied gas supply line and compressing the liquefied gas in the liquefied gas storage tank and supplying the liquefied gas to the customer.

Specifically, the heat exchange medium may be a glycol water.

The evaporating gas preheater may further include an evaporation gas preheater positioned upstream of the evaporation gas compressor and for exchanging heat between the evaporation gas discharged from the liquefied gas storage tank and the heat exchange medium discharged from the heat exchanger.

Specifically, the apparatus may further include a cooling water cooler provided on the heat exchange medium circulation line for cooling the heat exchange medium discharged from the heat exchanger.

A heat exchange medium storage tank provided on the heat exchange medium circulation line for temporarily storing the heat exchange medium; A heat exchange medium pump circulating the heat exchange medium discharged from the evaporative gas cooler to the heat exchanger; And a heat exchange medium heater provided on the heat exchange medium circulation line and supplying the heat exchange medium discharged from the heat exchange medium pump to the heat exchanger.

Specifically, the heat exchange medium circulation line may further include a heat exchange medium branch line branched from the heat exchange medium circulation line and communicating with the evaporative gas cooler, and connected to the heat exchange medium circulation line again.

Specifically, in the evaporative gas cooler, the heat exchange medium supplied from the heat exchanger and the evaporative gas compressed by the evaporative gas compressor are exchanged with each other, the heat exchange medium is heated, and the evaporative gas is cooled.

Specifically, the heat exchanger is supplied with the heat exchange medium by the heat exchange medium pump, receives the liquefied gas from the liquefied gas storage tank, causes the heat exchange medium and the liquefied gas to heat exchange with each other, the heat exchange medium is cooled, Can be heated.

Specifically, the evaporation gas preheater exchanges heat between the evaporation gas supplied from the liquefied gas storage tank and the heat exchange medium supplied by the heat exchanger, and the heat exchange medium is cooled and the evaporation gas can be heated.

The liquefied gas processing system according to the present invention can reduce the installation cost of the system, increase the energy efficiency of the cooling cycle, and maximize the space of the ship by using the heat exchange medium used in the heat exchanger together in the evaporative gas cooler And it is possible to simplify the operation of the system by unifying the heat exchanging device of the liquefied gas and the cooling structure of the evaporating gas, thereby assuring the reliability of the system driving.

Further, the liquefied gas processing system according to the present invention includes an evaporation gas preheater on the heat exchange medium circulation line, and uses a heat exchange medium on the evaporation gas cooling constitution to preheat the evaporation gas, so that the evaporation gas compressor is not a cryogenic compressor, So that the range of utilization of the evaporation gas can be widened. Further, since the heat exchange medium is heat-exchanged with the evaporation gas at the cryogenic temperature before compression, additional cold heat can be secured, thereby reducing the cost.

Further, the liquefied gas processing system according to the present invention has an effect of increasing the evaporative gas cooling efficiency by supplying the heat exchange medium through one unified line to the evaporative gas cooler located at the rear end of the evaporative gas compressor, The temperature of the evaporation gas at each end of the evaporation gas compressor can be lowered by introducing the heat exchange medium through the line branched to each of the evaporation gas coolers, thereby increasing the efficiency of the compressor.

1 is a configuration diagram of a liquefied gas processing system according to an embodiment of the present invention.
2 is a configuration diagram of a liquefied gas processing system according to another embodiment of the present invention.

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

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

1, a liquefied gas processing system 1 according to an embodiment of the present invention includes a liquefied gas storage tank 10, a customer 20, an evaporative gas compressor 30, a heat exchanger 40, A heat exchange medium pump 50, a heat exchange medium heater 60, a heat exchange medium storage tank 70, a pump 80 and an evaporation gas preheater 90.

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 mean not only NG (Natural Gas) in liquid state but also NG in supercritical state for convenience, and evaporation gas can be used to include not only gaseous evaporation gas but also liquefied evaporation gas have.

The liquefied gas storage tank (10) stores liquefied gas to be supplied to the customer (20). The liquefied gas storage tank 10 must store the liquefied gas in a liquid state, wherein the liquefied gas storage tank 10 may have the form of a pressure tank.

In addition, this embodiment can utilize the evaporation gas effectively by utilizing the vaporized gas generated from the liquefied gas storage tank 10 as the fuel of the consumer 20 by preferentially using it. If the evaporation gas becomes insufficient, The liquefied gas is supplied from the gas storage tank 10 to a high pressure pump 82 by a boosting pump 81 to be described later and the liquefied gas is again pressurized to a high pressure by the high pressure pump 82 The liquefied gas can be efficiently used by being used as the fuel of the customer 20 after being supplied to the heat exchanger 40.

Here, a forcing vaporizer (not shown) may be provided downstream of the liquefied gas storage tank 10, and a boosting pump 81 may be provided inside the liquefied gas storage tank 10.

The forced vaporizer is operated when the flow rate of the evaporation gas is insufficient, so that the flow rate of the evaporation gas supplied to the customer 20 can be increased. That is, the forced vaporizer is provided upstream of the evaporative gas compressor 30 on the evaporative gas supply line 21 to be described later, and heats the liquefied gas in the liquefied gas storage tank 10 to the evaporative gas compressor 30, Gas can be supplied.

The consumer 20 consumes the evaporated gas supplied from the liquefied gas storage tank 10. At this time, the customer 20 may be a high-pressure engine, a high-pressure fuel injection engine (for example, a MEGI engine). The customer 20 may include a high-pressure consumer 201 supplied with the high-pressure evaporation gas and a low-pressure consumer 202 supplied with the low-pressure evaporation gas.

The consumer 20 may include an engine (not shown), a boiler (not shown), a turbine (not shown) and a GCU (not shown), and the type of the consumer 20 is not particularly limited Do not.

The engine has a high-pressure engine and a low-pressure engine. The high-pressure engine generally uses high-pressure evaporation gas of about 300 bar, and the low-pressure engine uses low-pressure evaporation gas of about 5 to 10 bar.

The turbine may be, but is not limited to, a gas turbine, a steam turbine, and a steam turbine (HRSG) using waste heat. Turbines can be used to produce power and can be used to generate hull power by being connected to drive shafts that propel propellers directly.

Of course, in this embodiment, the customer 20 may be an engine for driving the propeller, but it may be an engine for generating power or an engine for generating other power. However, the customer 20 may be an internal combustion engine that generates a driving force by the combustion of the evaporative gas.

The consumer 20 is supplied with the evaporative gas pressurized by the evaporative gas compression system (not shown) and can obtain the driving force. The evaporative gas compression system includes the evaporative gas compressor 30 and the evaporative gas cooler 31 ). The state of the evaporative gas supplied to the consumer 20 may vary depending on the state required by the consumer 20.

The high-pressure consumer 201 may be a consumer 20, for example, a MEGI engine (not shown), which is multi-stage compressed by the evaporation gas compressor 30 and uses high-pressure evaporation gas of about 300 bar, Pressure pump 82 from the liquefied gas storage tank 10 when the evaporation gas generated from the liquefied gas storage tank 10 is smaller than the evaporation gas amount required by the high-pressure consumer 201, And the liquefied gas heated and pressurized by the heat exchanger 40 can be used.

The low-pressure consumer 202 may be a consumer 20 using two or three stages of compressed and low-pressure evaporative gas of about 7 to 10 bar by the evaporative gas compressor 30.

The low pressure consumer 202 may be a dual fuel engine (e.g., a DFDE engine; not shown) in which evaporative gas and oil are supplied in a mixed state without being fed. This is to prevent the mixture of two materials having different combustion temperatures from being mixed to prevent the low-pressure consumer 202 from being inefficient.

An evaporative gas supply line 21 for transferring evaporative gas may be installed between the liquefied gas storage tank 10 and the customer 20 and a forced vaporizer, an evaporative gas compressor 30, An evaporative gas cooler 31, an evaporative gas preheater 90 and an evaporative gas heater (not shown) are provided to supply the evaporative gas to the consumer 20.

The evaporation gas heater is located on the rear side of the evaporation gas compressor (30), so that the evaporation gas can be suitably adjusted to the required temperature of the customer (20).

When the evaporated gas compressed by the evaporative gas compressor 30 is supercooled by the evaporative gas cooler 31 installed at the rear end of the evaporative gas compressor 30, the temperature may not meet the required temperature of the consumer 20. The evaporation gas heater may be installed between the customer 20 and the evaporator gas compressor 30 so that the evaporator gas is appropriately heated to the temperature required by the consumer 20 before the evaporation gas is supplied to the consumer 20 Can be increased.

The evaporation gas supply line 21 may include a high-pressure evaporation gas supply line 211 and a low-pressure evaporation gas supply line 212.

The high-pressure evaporative gas supply line 211 connects the liquefied gas storage tank 10 and the high-pressure consumer 201 and supplies the evaporated gas, which has been multi-stage compressed at a high pressure, to the high-pressure consumer 201 by the evaporative gas compressor 30 The low pressure evaporation gas supply line 212 is connected to the low pressure consumer 202 by being branched between the second and third stages of the evaporation gas compressor 30 and is connected to the evaporation gas compressor To the low-pressure consumer 202.

At this time, an evaporation gas supply valve (not shown) is installed in the evaporation gas supply line 21 so that the supply amount of the evaporation gas can be adjusted according to the opening degree of the evaporation gas supply valve.

In the present embodiment, it further includes a heat exchange medium circulation line 22. The heat exchange medium circulation line 22 connects the evaporative gas cooler 31 and the heat exchanger 40. The heat exchange medium circulation line 22 may further include a heat exchange medium pump 50, a heat exchange medium heater 60, a heat exchange medium storage tank 70, an evaporation gas preheater 90, And can cool or heat the evaporated gas.

The heat exchange medium circulation line 22 is branched from the heat exchange medium circulation line 22 and communicates with the evaporative gas cooler 31 located at the rear end of each evaporative gas compressor 30 and is connected to the heat exchange medium circulation line 22 And may further include heat exchange medium branch lines 221, 222, 223, and 224.

The heat exchange medium branch lines 221, 222, 223 and 224 may be respectively branched in the heat exchange medium circulation line 22 to communicate with a plurality of evaporative gas coolers 31 and then to the heat exchange medium circulation line 22. The heat exchange medium circulation line 22 of the present invention allows the heat exchange medium to flow into each of the evaporative gas coolers 31 by the heat exchange medium branch lines 221, 222, 223 and 224 branched on the heat exchange medium circulation line 22, The heat exchange medium can be introduced into the evaporative gas cooler 31.

Therefore, in this embodiment, when the evaporation gas compressor 30 compresses the evaporation gas at each stage, it is possible to introduce the evaporation gas of the appropriate temperature required by the evaporation gas compressor 30, The temperature of the evaporation gas at the rear end can be lowered, and the efficiency of the evaporative gas compressor 30 is increased through reduction of the volume of the evaporation gas, thereby enabling stable driving.

In addition, the liquefied gas processing system 1 of the present invention has a single evaporative gas cooling device having one heat exchange medium circulation line 22 as described above, so that the evaporative gas cooling efficiency is increased and the control of the system is effectively There is an effect that the reliability is increased.

A heat exchange medium circulation valve (not shown) is installed in the heat exchange medium circulation line 22 and the heat exchange medium branch lines 221, 222, 223 and 224 so that the supply amount of the heat exchange medium can be adjusted according to the opening degree of the heat exchange medium circulation valve.

In this embodiment, the liquefied gas supply line 23 may be further included. The liquefied gas supply line 23 connects the liquefied gas storage tank 10 and the consumer 20. A booster pump 81, a high-pressure pump 82 and a heat exchanger 40 may be provided on the liquefied gas supply line 23. A liquefied gas supply valve (not shown) is installed in the liquefied gas supply line 23 And the supply amount of the liquefied gas can be adjusted in accordance with the opening degree of the liquefied gas supply valve.

The evaporative gas compressor (30) is provided on the evaporative gas supply line (21) and pressurizes the evaporative gas generated in the liquefied gas storage tank (10). Further, the plurality of evaporative gas compressors 30 pressurize the evaporative gas to 200 to 400 bar (about 300 bar), and the pressurized evaporative gas may be supplied to the consumer 20 through the evaporative gas supply line 21.

A plurality of evaporation gas compressors (30) can be provided to pressurize the evaporation gas at multiple stages. For example, five evaporation gas compressors 30 may be provided so that the evaporation gas is pressurized in five stages. The five-stage pressurized evaporation gas may be pressurized to 200 bar to 400 bar (for example, 300 bar) and supplied to the customer 20 via the evaporation gas supply line 21.

Specifically, the evaporative gas compressor 30 flows into the liquefied gas storage tank 10 at about 1.05 bar and is pressurized to about 5 bar at the first stage, about 15 bar at the second stage, about 90 bar at the third stage, , And in the fifth stage it can be pressurized to about 300 bar. The evaporation gas pressurized at the second stage to about 15 bar is supplied to the low pressure consumer 202 by the low pressure evaporation gas supply line 212 or is introduced into the evaporation gas compressor 30 by the high pressure evaporation gas supply line 211, And the evaporated gas pressurized at the fifth stage to about 300 bar can be supplied to the high-pressure consumer 201 by the high-pressure evaporative gas supply line 211.

Between the plurality of evaporative gas compressors 30, an evaporative gas cooler 31 may be provided. The evaporated gas refrigerant 31 is heated by the evaporation gas compressor 30 and the temperature of the evaporated gas refrigerant 31 is increased as the pressure rises to increase the volume of the evaporated gas compressor 30 due to the volume increase. The temperature of the evaporation gas can be lowered again.

The evaporative gas cooler 31 may be installed in the same number as that of the evaporative gas compressor 30 and each evaporative gas cooler 31 may be provided at the rear end of each evaporative gas compressor 30.

In the embodiment of the present invention, the evaporative gas cooler 31 may be further included. The evaporative gas cooler (31) is located at the downstream end of the evaporative gas compressor (30) and cools the pressurized evaporative gas. The evaporative gas cooler 31 exchanges the heat exchange medium supplied from the evaporative gas preheater 90 and the evaporative gas compressed by the evaporative gas compressor 30 into the high temperature and exchanges heat with each other on the evaporative gas cooler 31 The heat exchange medium can be heated and the evaporation gas can be cooled.

The heat exchange medium used in the evaporative gas cooler 31 may be a glycol water. The glycol water refers to a fluid obtained by mixing ethylene glycol and water. The heat exchange medium is heated by a heat exchange medium heater 60, cooled in a heat exchanger 40, circulated through a heat exchange medium circulation line 22 can do.

The heat exchanger (40) is provided on the liquefied gas supply line (23) and exchanges heat between the liquefied gas and the heat exchange medium. The heat exchanger 40 is supplied with the heat exchange medium by the heat exchange medium pump 50, receives the pressurized liquefied gas by the high pressure pump 82, exchanges the heat exchange medium and the liquefied gas with each other, The liquefied gas can be heated.

Specifically, the heat exchanger 40 can heat the liquefied gas using the heat exchange medium supplied from the heat exchange medium pump 50, and the heat exchange medium is heated by the liquefied gas supplied from the high pressure pump 82 Can be cooled.

In the liquefied gas processing system 1 of the present invention, the heat exchange of the liquefied gas and the cooling of the evaporated gas are connected in one cycle, thereby reducing the construction cost of the system, maximizing the efficiency of the cooling and heating cycle, It is possible to maximize the securing of the space of the ship and also to assure the reliability of the system operation.

The heat exchange medium pump 50 circulates the heat exchange medium discharged from the evaporative gas cooler 31 to the heat exchanger 40.

The heat exchange medium pump 50 may be installed between the heat exchange medium storage tank 70 and the heat exchange medium heater 60 or may be a centrifugal pump.

The heat exchange medium heater 60 is provided on the heat exchange medium circulation line 22 and can heat the heat exchange medium discharged from the heat exchange medium pump 50 before the heat exchange medium 40 is supplied to the heat exchanger 40.

The heat exchange medium heater 60 is a heat exchange medium heat exchanger having sufficient heat to heat the heat exchanger medium sufficiently to achieve the purpose of heating the liquefied gas when the heat exchange medium is supplied to the heat exchanger 40 while being heated via the evaporative gas cooler 31. [ .

The heat exchange medium storage tank 70 is provided on the heat exchange medium circulation line 22 and can temporarily store the heat exchange medium. The heat exchange medium may be a glycol water, but the present invention is not limited thereto.

A heat exchange medium pump 50 is provided downstream of the heat exchange medium storage tank 70 so that a predetermined amount of heat exchange medium is introduced into the heat exchange medium heater 60 from the heat exchange medium storage tank 70 by the heat exchange medium pump 50 And a plurality of evaporative gas coolers 31 are provided upstream of the heat exchange medium storage tank 70 to transfer cold heat to the evaporated gas and the heated heat exchange medium can be reintroduced into the heat exchange medium storage tank 70 .

The heat exchange medium storage tank 70 and the heat exchange medium pump 50, the heat exchanger 40, the evaporation gas preheater 90 to be described later and the evaporation gas cooler 31 can be connected by the heat exchange medium circulation line 22. That is, the heat exchange medium flows along the heat exchange medium circulation line 22 and flows through the heat exchange medium storage tank 70, the heat exchange medium pump 50, the heat exchanger 40, the evaporation gas preheater 90, the evaporation gas cooler 31, And the heat exchanger 40 transfers heat to the liquefied gas. In the evaporative gas preheater 90, heat is transferred to the evaporative gas. In the evaporative gas cooler 31, the refrigerant can be transferred to the evaporative gas.

The pump 80 is provided on the liquefied gas supply line 23 and can compress the liquefied gas in the liquefied gas storage tank 10 and supply it to the customer 20. The pump 80 may include a boosting pump 81 or a high pressure pump 82.

The boosting pump 81 may be provided on the liquefied gas supply line 23 and may be a locking pump or a reciprocating pump so that a sufficient amount of liquefied gas is supplied to the high pressure pump 82, Can be prevented from being cavitated.

Further, the boosting pump 81 is capable of depressurizing the liquefied gas from the liquefied gas storage tank 10 to pressurize the liquefied gas to several to several tens of bar, and preferably to 1 to 25 bar.

The high-pressure pump 82 can pressurize the liquefied gas discharged from the boosting pump 81 to a high pressure so that the liquefied gas can be supplied to the high-pressure consumer 201.

Further, the high-pressure pump 82 pressurizes the liquid-state liquefied gas pressurized by the boosting pump 81 to the heat exchanger 40. At this time, the high-pressure pump 82 pressurizes the liquefied gas to a pressure required by the high-pressure consumer 201, for example, 200 bar to 400 bar and supplies the pressurized liquefied gas to the high-pressure consumer 201, . ≪ / RTI >

The pump 80 can supply the liquefied gas to the high-pressure consumer 201 when the amount of evaporation gas generated in the liquefied gas storage tank 10 is smaller than the evaporation gas demanded by the high-pressure consumer 201. [

The booster pump 81 supplies the liquefied gas stored in the liquefied gas storage tank 10 to the high pressure pump 82 and the high pressure pump 82 supplies the liquefied gas discharged from the booster pump 81 The liquefied gas can be supplied to the high-pressure consumer 201 by pressurizing it with high pressure.

The evaporation gas preheater 90 is located in front of the evaporation gas compressor 30 and exchanges heat between the evaporation gas discharged from the liquefied gas storage tank 10 and the heat exchange medium circulated in the evaporation gas cooler 31.

The evaporation gas preheater 90 allows the evaporation gas supplied from the liquefied gas storage tank 10 and the heat exchange medium supplied by the heat exchanger 40 to exchange heat with each other and the heat exchange medium is cooled on the evaporation gas preheater 90 , The evaporation gas can be heated.

Since the evaporated gas discharged from the liquefied gas storage tank 10 corresponds to about -120 DEG C, it corresponds to an ultra-low temperature. When the extremely low temperature evaporated gas is directly introduced into the evaporative gas compressor 30, there is a possibility that the evaporative gas compressor 30 is broken, and the operation efficiency may be lowered. Therefore, it is necessary to preheat the evaporation gas before compressing the ultra-low temperature evaporation gas into the evaporation gas compressor (30).

Accordingly, the liquefied gas processing system 1 of the present invention can reduce the cost of the additional heat source and improve the reliability of the driving with a single system by providing the heat source for heating the ultra-low temperature evaporation gas through the heat exchange medium.

In addition, the evaporation gas compressor 30 can be replaced with a conventional evaporation gas compressor 30, not the cryogenic compressor, so that the cost of purchasing the evaporation gas compressor 30 can be reduced, There is an effect that the range of selection of the display device is widened.

And the evaporative gas preheater 90 helps cool the heat exchange medium by the liquefied gas by the heat exchanger 40 to further cool the heat exchange medium thereby increasing the energy efficiency during cooling of the evaporation gas and reducing the cooling cost .

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

2, the liquefied gas processing system 2 according to another embodiment of the present invention includes a liquefied gas storage tank 10, a customer 20, a heat exchange medium circulation line 22, an evaporative gas compressor (not shown) 30, a heat exchanger 40, a heat exchange medium pump 50, a heat exchange medium heater 60, a heat exchange medium storage tank 70, a pump 80 and a cooling water cooler 100. In another embodiment of the present invention, the liquefied gas storage tank 10, the customer 20, the evaporative gas compressor 30, the heat exchanger 40, the heat exchange medium pump 50, the heat exchange medium heater 60, The tank 70, the pump 80, and the like are similar to those in the liquefied gas processing system 1 according to the embodiment of the present invention, and the description thereof will be omitted.

An evaporative gas supply line 21 for transferring evaporative gas may be installed between the liquefied gas storage tank 10 and the customer 20. The evaporative gas supply line 21 may be provided with a forced vaporizer A compressor 30, an evaporative gas cooler 31 and an evaporative gas heater (not shown) may be provided to supply the evaporated gas to the consumer 20.

The evaporation gas heater is positioned at the front side of the evaporation gas compressor (30) to increase the temperature of the evaporation gas flowing into the evaporation gas compressor (30) so that the ordinary evaporation gas compressor can be used instead of the ultra low temperature evaporation gas compressor So that the cost reduction effect can be obtained.

Further, the evaporation gas heater is positioned on the rear side of the evaporation gas compressor 30, so that the evaporation gas can be appropriately adjusted to the required temperature of the consumer 20.

The cooling water cooler 100 is provided on the heat exchange medium circulation line 22 and can cool the heat exchange medium discharged from the heat exchanger 40.

The coolant cooler 100 can further lower the temperature when the heat exchange medium cooled by the heat exchange between the heat exchange medium and the liquefied gas in the heat exchanger 40 does not meet the temperature required by the evaporative gas cooler 31. [

A temperature sensor (not shown) may be provided between the cooling water cooler 100 and the heat exchanger 40.

The temperature sensor can measure the temperature of the heat exchange medium supplied from the heat exchanger (40) to the cooling water cooler (100). The temperature sensing sensor can measure the temperature of the heat exchange medium and transmit the measured temperature to the cooling water cooler 100. The cooling water cooler 100 has a separate receiving device (not shown) The measured temperature transmitted from the sensor can be received.

The coolant cooler 100 can calculate the difference between the temperature received from the temperature sensor and the temperature corresponding to the evaporative gas cooler 31 and cool the heat exchange medium to a temperature equal to the difference.

The temperature of the heat exchange medium is further cooled to a temperature corresponding to the evaporative gas cooler 31 so that the evaporative gas refrigerant 31 can effectively cool the evaporated gas discharged from the evaporative gas compressor 30, Can be increased.

In this embodiment, by using the heat exchange medium used in the heat exchanger 40 together in the evaporative gas cooler 31, the installation cost of the system can be reduced, the energy efficiency of the cooling cycle can be increased, And it is possible to simplify the operation of the system by unifying the heat exchanging device of the liquefied gas and the cooling structure of the evaporation gas, thereby assuring the reliability of the system driving.

The liquefied gas processing system (1, 2) according to the present invention also includes an evaporation gas preheater (90) on the heat exchange medium circulation line (22), using a heat exchange medium on the evaporative gas cooling configuration to preheat the evaporation gas And the evaporation gas compressor 30 can use a general compressor instead of a cryogenic compressor, thereby widening the range of utilization of the evaporation gas. Further, the heat exchange medium can secure additional cold heat by heat exchange with the cryogenic evaporation gas before compression So that the cost can be reduced.

Further, the liquefied gas processing system (1, 2) according to the present invention increases the evaporative gas cooling efficiency by supplying the heat exchange medium through one unified line to the evaporative gas cooler (31) located at the rear end of the evaporative gas compressor And the temperature of the evaporation gas at each end of the evaporation gas compressor 30 can be relatively lowered by introducing the heat exchange medium through a line branched to each evaporation gas cooler 31 on a single line, So that the efficiency of the semiconductor device is increased.

1,2: liquefied gas processing system 10: liquefied gas storage tank
20: Demand point 201: High pressure demand point
202: low pressure consumer 21: evaporation gas supply line
211: high pressure evaporation gas supply line 212: low pressure evaporation gas supply line
22: Heat exchange medium circulation line
221, 222, 223, 224: heat exchange medium branch line
23: Liquefied gas supply line 30: Evaporative gas compressor
31: Evaporative gas cooler 40: Heat exchanger
50: heat exchange medium pump 60: heat exchange medium heater
70: Heat exchange medium storage tank 80: Pump
81: boosting pump 82: high pressure pump
90: Evaporative gas preheater 100: Cooling water cooler

Claims (11)

An evaporative gas supply line connecting the liquefied gas storage tank and the customer;
At least one evaporative gas compressor provided on the evaporative gas supply line and compressing the evaporative gas;
At least one evaporative gas cooler positioned downstream of the evaporative gas compressor and cooling the pressurized evaporative gas with a heat exchange medium;
A liquefied gas supply line connecting the liquefied gas storage tank and the demander;
A heat exchanger provided on the liquefied gas supply line for exchanging heat with liquefied gas to the heat exchange medium; And
And a heat exchange medium circulation line connecting the evaporative gas cooler and the heat exchanger. The system according to claim 1,
A low pressure consumer supplied with a low-pressure evaporative gas; And
And a high-pressure consumer which is supplied with high-pressure evaporative gas,
Wherein the evaporation gas supply line includes:
A low pressure evaporation gas supply line branched from the second and third stages of the evaporation gas compressor and connected to the low pressure consumer, for supplying evaporation gas pressurized to the second stage by the evaporation gas compressor to the low pressure consumer; And
And a high-pressure evaporation gas supply line connecting the liquefied gas storage tank and the high-pressure consumer to supply the evaporation gas compressed by the evaporation gas compressor to the high-pressure consumer at a high pressure. The method according to claim 1,
Further comprising a pump provided on the liquefied gas supply line for compressing the liquefied gas in the liquefied gas storage tank and supplying the liquefied gas to the customer. The heat exchanger according to claim 1,
Characterized in that the liquefied gas is a glycol water. The method according to claim 1,
Further comprising: an evaporative gas preheater positioned upstream of the evaporative gas compressor for exchanging heat between the evaporative gas discharged from the liquefied gas storage tank and the heat exchange medium discharged from the heat exchanger. The method according to claim 1,
And a cooling water cooler provided on the heat exchange medium circulation line for cooling the heat exchange medium discharged from the heat exchanger. The method according to claim 1,
A heat exchange medium storage tank provided on the heat exchange medium circulation line for temporarily storing the heat exchange medium;
A heat exchange medium pump circulating the heat exchange medium discharged from the evaporative gas cooler to the heat exchanger; And
And a heat exchange medium heater provided on the heat exchange medium circulation line and supplying the heat exchange medium discharged from the heat exchange medium pump to the heat exchanger. The heat exchanger according to claim 1,
Further comprising a heat exchange medium branch line branched from the heat exchange medium circulation line and communicating with the evaporative gas cooler and again connected to the heat exchange medium circulation line. 2. The apparatus of claim 1,
Wherein the heat exchange medium supplied from the heat exchanger and the evaporation gas compressed by the evaporation gas compressor are exchanged with each other so that the heat exchange medium is heated and the evaporation gas is cooled. 8. The heat exchanger according to claim 7,
Characterized in that the heat exchange medium is supplied by the heat exchange medium pump, the liquefied gas is supplied from the liquefied gas storage tank, the heat exchange medium and the liquefied gas are exchanged with each other, the heat exchange medium is cooled and the liquefied gas is heated. Gas treatment system. The apparatus of claim 1, wherein the evaporator gas pre-
Wherein the heat exchange medium is heat exchanged with the evaporation gas supplied from the liquefied gas storage tank and the heat exchange medium supplied by the heat exchanger so that the heat exchange medium is cooled and the evaporation gas is heated.

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