KR101888944B1 - A separator and Treatment System Of Liquefied Gas with the same - Google Patents

Abstract

The present invention relates to a gas-liquid separator, comprising: a housing formed with a space and surrounding the space; An inlet port through which evaporative gas or impurities are introduced into the housing; An impurity separating device provided on one side of the housing for separating the impurities from the evaporated gas; A first discharge port provided on the upper side of the impurity separating apparatus to discharge a liquid-phase evaporative gas existing in the housing to the outside of the housing; And a second discharge port provided below the impurity separating device for discharging evaporative gas or impurities in a liquid state present in the housing to the outside of the housing.
The present invention also relates to a liquefied gas processing system including a gas-liquid separator, comprising: a first evaporation gas supply line connected from a liquefied gas storage tank to a customer; An evaporative gas compressor provided on the first evaporative gas supply line and compressing the evaporative gas; A second evaporation gas supply line branched on the first evaporation gas supply line at a front end of the evaporation gas compressor; A re-liquefying device for re-liquefying the evaporated gas; A first preheater provided on the first evaporation gas supply line; And a second preheater provided on the second evaporation gas supply line, wherein the first preheater is supplied with a heat source through a refrigerant supplied from the remelting device, and is used prior to the second preheater, The re-liquefier comprises: a re-liquefied refrigerant device for supplying a heat exchange medium; A re-liquefying heat exchanger for exchanging heat between the evaporated gas compressed in the evaporative gas compressor and the heat exchange medium; And a gas-liquid separator for separating the vaporized gas supplied from the redistribution heat exchanger into a liquid phase and a vapor phase, wherein the gas-liquid separator comprises: a housing formed with a space and surrounding the space; An inlet port through which evaporative gas or impurities are introduced into the housing; An impurity separating device provided on one side of the housing for separating the impurities from the evaporated gas; A first discharge port provided on the upper side of the impurity separating apparatus and discharging evaporative gas existing in the housing to the outside of the housing; And a second discharge port provided below the impurity separating device for discharging evaporative gas or impurities existing in the housing to the outside of the housing.
The present invention also relates to a liquefied gas processing system comprising a gas-liquid separator, comprising: a vapor gas supply line connected from a liquefied gas storage tank to a customer; An evaporative gas compressor provided on the evaporative gas supply line and compressing the evaporative gas; And a re-liquefier device for re-liquefying the evaporated gas discharged from the evaporative gas compressor, wherein the demander is supplied with evaporative gas from the re-liquefier, and the re-liquefier device includes a re-liquefied refrigerant Device; A re-liquefying heat exchanger for exchanging heat between the evaporated gas compressed in the evaporative gas compressor and the heat exchange medium; And a gas-liquid separator for separating the vaporized gas supplied from the redistribution heat exchanger into a liquid phase and a vapor phase, wherein the gas-liquid separator comprises: a housing formed with a space and surrounding the space; An inlet port through which evaporative gas or impurities are introduced into the housing; An impurity separating device provided on one side of the housing for separating the impurities from the evaporated gas; A first discharge port provided on the upper side of the impurity separating apparatus and discharging evaporative gas existing in the housing to the outside of the housing; And a second discharge port provided below the impurity separating device for discharging evaporative gas or impurities existing in the housing to the outside of the housing.
The gas-liquid separator according to the present invention and the liquefied gas processing system including the gas-liquid separator according to the present invention can prevent impurities or oil from being contained in the liquefied gas returning to the liquefied gas storage tank, There is an increasing effect.

Description

[0001] The present invention relates to a gas-liquid separator and a liquefied gas processing system including the gas-

The present invention relates to a gas-liquid separator and a liquefied gas processing system including the same.

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

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

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

In addition, when LNG is stored in a liquid state, some LNG is vaporized and boil off gas (BOG) is generated as heat penetration occurs in the tank. Such evaporation gas may cause problems in a liquefied gas processing system. In order to solve the problem by discharging the evaporation gas to the outside (in the past, the evaporation gas was simply discharged to the outside in order to lower the tank pressure by lowering the tank pressure), the problem was solved. However, . Therefore, recently, as a technique for efficiently processing evaporative gas, there has been utilized a method of re-liquefying the generated evaporative gas and supplying it to the engine. However, since sufficient evaporative gas is not consumed even in such a utilization, efficient utilization And the ongoing research and development is being carried out.

It is an object of the present invention to provide a gas-liquid separator and a liquefied gas processing system including the gas-liquid separator for flexibly selecting the driving equipment by making it possible to use a compressor available at room temperature through a preheater.

It is also an object of the present invention to provide a gas-liquid separator and a liquefied gas processing system including the gas-liquid separator for enabling a pump for supplying fuel to be omitted by supplying fuel to a customer through a high-pressure remelting device.

It is also an object of the present invention to provide a gas-liquid separator for preventing an oil or an impurity from being mixed in a liquefied gas returning to a liquefied gas by providing an impurity separator inside the gas-liquid separator and a liquefied gas processing system including the same.

According to an embodiment of the present invention, there is provided a gas-liquid separator comprising: a housing formed with a space and surrounding the space; An inlet port through which evaporative gas or impurities are introduced into the housing; An impurity separating device provided on one side of the housing for separating the impurities from the evaporated gas; A first discharge port provided on the upper side of the impurity separating apparatus to discharge a liquid-phase evaporative gas existing in the housing to the outside of the housing; And a second discharge port provided below the impurity separating device for discharging evaporative gas or impurities in a liquid state present in the housing to the outside of the housing.

Specifically, the impurity separating apparatus may include: a fixing unit connected to and fixed to one side of the housing; And a filtering portion protruding from the fixing portion toward the other side of the housing facing the fixing portion.

Specifically, the impurity separating apparatus may further include a translating unit provided between the fixing unit and the filtering unit, the translating unit moving the filtering unit vertically.

Specifically, the impurity separating apparatus may further include a rotating unit that rotates the filtering unit such that the filtering unit is deflected upward or downward from the fixing unit.

Specifically, the rotating portion may be provided between the filtering portion and the fixing portion.

Specifically, the filtering section includes: a first filtering section deflected upward or downward from the fixing section by the rotating section; And a second filtering unit for fixing the rotating unit and the fixing unit.

Specifically, the impurity separating device may include: a translating part provided between the fixing part and the filtering part and capable of moving the filtering part up and down; And a rotating unit for rotating the filtering unit such that the filtering unit is deflected upward or downward from the fixing unit.

Specifically, the first discharge port supplies the liquid evaporation gas to the liquefied gas storage tank, and the second discharge port can supply the evaporation gas or the impurities of the liquid crystal to the engine.

In addition, a liquefied gas processing system including a gas-liquid separator according to an embodiment of the present invention includes: a first evaporation gas supply line connected from a liquefied gas storage tank to a customer; An evaporative gas compressor provided on the first evaporative gas supply line and compressing the evaporative gas; A second evaporation gas supply line branched on the first evaporation gas supply line at a front end of the evaporation gas compressor; A re-liquefying device for re-liquefying the evaporated gas; A first preheater provided on the first evaporation gas supply line; And a second preheater provided on the second evaporation gas supply line, wherein the first preheater is supplied with a heat source through a refrigerant supplied from the remelting device, and is used prior to the second preheater, The re-liquefier comprises: a re-liquefied refrigerant device for supplying a heat exchange medium; A re-liquefying heat exchanger for exchanging heat between the evaporated gas compressed in the evaporative gas compressor and the heat exchange medium; And a gas-liquid separator for separating the vaporized gas supplied from the redistribution heat exchanger into a liquid phase and a vapor phase, wherein the gas-liquid separator comprises: a housing formed with a space and surrounding the space; An inlet port through which evaporative gas or impurities are introduced into the housing; An impurity separating device provided on one side of the housing for separating the impurities from the evaporated gas; A first discharge port provided on the upper side of the impurity separating apparatus and discharging evaporative gas existing in the housing to the outside of the housing; And a second discharge port provided below the impurity separating device for discharging evaporative gas or impurities existing in the housing to the outside of the housing.

Specifically, the first discharge port supplies the liquid evaporation gas to the liquefied gas storage tank, and the second discharge port can supply the liquid evaporation gas or the impurities to the consumer.

Specifically, the evaporative gas compressor can compress and discharge the evaporation gas drawn from -10 ° C to -5 ° C at a pressure of 25 bar to 30 bar.

Further, a liquefied gas processing system including a gas-liquid separator according to another embodiment of the present invention includes: an evaporation gas supply line connected from a liquefied gas storage tank to a customer; An evaporative gas compressor provided on the evaporative gas supply line and compressing the evaporative gas; And a re-liquefier device for re-liquefying the evaporated gas discharged from the evaporative gas compressor, wherein the demander is supplied with evaporative gas from the re-liquefier, and the re-liquefier device includes a re-liquefied refrigerant Device; A re-liquefying heat exchanger for exchanging heat between the evaporated gas compressed in the evaporative gas compressor and the heat exchange medium; And a gas-liquid separator for separating the vaporized gas supplied from the redistribution heat exchanger into a liquid phase and a vapor phase, wherein the gas-liquid separator comprises: a housing formed with a space and surrounding the space; An inlet port through which evaporative gas or impurities are introduced into the housing; An impurity separating device provided on one side of the housing for separating the impurities from the evaporated gas; A first discharge port provided on the upper side of the impurity separating apparatus and discharging evaporative gas existing in the housing to the outside of the housing; And a second discharge port provided below the impurity separating device for discharging evaporative gas or impurities existing in the housing to the outside of the housing.

Specifically, the first discharge port supplies the liquid evaporation gas to the liquefied gas storage tank, and the second discharge port can supply the liquid evaporation gas or the impurities to the consumer.

Specifically, the evaporative gas compressor compresses and discharges the evaporative gas introduced from -10 ° C. to -5 ° C. from 25 bar to 30 bar, and the re-liquefier can supply the evaporation gas of 25 to 30 bar to the customer.

The gas-liquid separator according to the present invention and the liquefied gas processing system including the gas-liquid separator according to the present invention can be provided with a compressor that can be used even at room temperature by providing an optional preheater capable of driving efficiently, There is an effect.

The gas-liquid separator according to the present invention and the liquefied gas processing system including the gas-liquid separator according to the present invention supply the liquid gas directly to the customer through the gas-liquid separator for separating and storing the liquefied gas at a pressure required by the customer, The construction cost can be saved, and the system installation space can be sufficiently secured.

The gas-liquid separator according to the present invention and the liquefied gas processing system including the gas-liquid separator according to the present invention can prevent impurities or oil from being contained in the liquefied gas returning to the liquefied gas storage tank, There is an increasing effect.

1 is a conceptual diagram of a liquefied gas processing system including a gas-liquid separator according to an embodiment of the present invention.
2 is a conceptual diagram of a liquefied gas processing system including a gas-liquid separator according to another embodiment of the present invention.
3 is a conceptual diagram of a gas-liquid separator in a liquefied gas processing system according to 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 re-liquefier 40a, , And a preheater 50a.

Hereinafter, the LNG may be used to encompass not only a liquid state NG but also a NG state such as a supercritical state for the sake of convenience. The evaporation gas may include not only gaseous state evaporation gas but also liquefied evaporation gas Can be used as a meaning.

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, at which time the liquefied gas storage tank 10 may have the form of a pressure tank.

The liquefied gas storage tank 10 includes an outer tank (not shown), an inner tank (not shown), and a heat insulating portion (not shown). The outer tank is a structure that forms the outer wall of the liquefied gas storage tank 10, and may be formed of steel, and may have a polygonal cross section.

The inner tank is provided inside the outer tank, and can be supported and supported inside the outer tank by a support (not shown). At this time, the support may be provided on the lower end of the inner tank, and may be provided on the side of the inner tank for suppressing lateral movement of the inner tank.

The inner tank can be made of stainless steel and can be designed to withstand pressures from 5 bar to 10 bar (6 bar, for example). The reason why the inner tank is designed to withstand such a constant pressure is that the inner pressure of the inner tank can be increased as the liquefied gas contained in the inner tank is evaporated and the evaporation gas is generated.

A baffle (not shown) may be provided in the inner tank. The baffle means a plate in the form of a lattice. As the baffle is installed, the pressure inside the tank can be evenly distributed to prevent the tank pressure from being concentrated to a part of the tank.

The heat insulating portion is provided between the inner tank and the outer tank and can prevent the external heat energy from being transmitted to the inner tank. At this time, the heat insulating portion may be in a vacuum state. By forming the thermal insulation in a vacuum, the liquefied gas storage tank 10 can withstand higher pressures more efficiently than a conventional tank. For example, the liquefied gas storage tank 10 can sustain a pressure of 5 to 20 bar through the vacuum insulation.

As described above, in this embodiment, the use of the pressure tank type liquefied gas storage tank 10 having a vacuum type heat insulating portion between the outer tanks and the inner tank makes it possible to minimize the generation of the evaporated gas, It is possible to prevent a problem such as breakage of the storage tank 10 from occurring.

A first evaporation gas supply line 11 for supplying a liquefied gas may be provided between the liquefied gas storage tank 10 and the customer 20 and the first evaporation gas supply line 11 A compressor 30 and a preheater 50 (preferably a first preheater 51) may be provided to supply the evaporation gas to the consumer 20.

At this time, a first evaporation gas supply valve (not shown) is provided in the first evaporation gas supply line 11 so that the supply amount of the evaporation gas can be adjusted according to the opening degree of the first evaporation gas supply valve.

In the embodiment of the present invention, the first evaporation gas supply line 11 may further include a second evaporation gas supply line 12 branched from a front end of the evaporation gas compressor 30 to be described later.

The second evaporation gas supply line 12 may be equipped with a preheater 50 (preferably a second preheater 52) and a second evaporation gas supply valve (not shown) The supply amount of the evaporation gas can be adjusted by controlling the opening degree.

The second evaporation gas supply line 12 may be branched between the liquefied gas storage tank 10 and the evaporative gas compressor 30 in the first evaporation gas supply line 11 and may be branched into the liquefied gas storage tank 10 A branch inlet may be provided in the near side and a branch outlet may be provided in the vicinity of the evaporative gas compressor 30. [

Further, in the embodiment of the present invention, the first evaporation gas supply line 11 may further include a liquefied gas return line 13 branching from the downstream end of the evaporative gas compressor 30. [

The liquefied gas return line 13 may include a re-liquefying heat exchanger 41a and a gas-liquid separator 42a to be described later. A liquefied gas return valve (not shown) may be provided to control the opening degree of the liquefied gas return valve The supply amount of the evaporated gas discharged from the evaporative gas compressor 30 or the liquid evaporated gas to be returned to the liquefied gas storage tank 10 in the gas-liquid separator 42a can be adjusted.

The customer 20 is driven through the liquefied gas supplied from the liquefied gas storage tank 10. That is, the consumer 20 needs liquefied gas and is driven using the raw material as the raw material. The consumer 20 may be an engine (not shown), a boiler (not shown), a GCU (not shown), and the like.

The consumer 20 may be a dual fuel engine (not shown) in the case of an engine, and may be driven by supplying low-pressure evaporative gas. When the customer 20 is a dual fuel engine, liquefied gas or fuel oil can be selectively supplied without being mixed with liquefied gas and fuel oil. This is to prevent the mixture of two materials having different combustion temperatures from being mixed, thereby preventing the efficiency of the engine from deteriorating.

As the piston (not shown) inside the cylinder (not shown) reciprocates by the combustion of the liquefied gas, the engine rotates the crankshaft (not shown) connected to the piston and the shaft Can be rotated. Accordingly, as the propeller (not shown) connected to the shaft finally rotates at the time of driving the engine, the hull (not shown) moves forward or backward.

The consumer 20 described above is, for example, an engine. The consumer 20 is not limited to this, and may be variously applied where the liquefied gas is needed.

That is, the customer 20 may be a gas turbine (not shown). The gas turbine can receive and consume the evaporative gas supplied from the liquefied gas storage tank 10, and the power generated by the gas turbine can be used to propel the propeller (not shown) Backward can be implemented.

Such a gas turbine can be driven by supplying a low-pressure evaporation gas.

The evaporation gas compressor (30) is provided on the first evaporation gas supply line (11) and compresses the evaporation gas. The evaporative gas compressor 30 compresses the evaporated gas discharged from the liquefied gas storage tank 10 at approximately 1 bar to 1.5 bar (preferably 1.03 bar) to approximately 20 to 35 bar (preferably 30 bar) 20) or the heat exchanger (40).

The evaporated gas discharged from the liquefied gas storage tank 10 is cryogenic at a temperature of minus 100 degrees Celsius to minus 90 degrees Celsius. When the evaporative gas is supplied to the evaporative gas compressor (30), there is a problem that when the compressor capable of being compressed at room temperature is used, the compressor may malfunction or be damaged in severe cases. Therefore, conventionally, a cryogenic evaporative gas compressor is used for compressing the cryogenic evaporation gas, but this is disadvantageous in that the cost is high and installation cost is excessively high.

Therefore, in the first embodiment of the present invention, the cost of the compressor is reduced by using the evaporative gas compressor 30 at room temperature, thereby reducing the construction cost of the liquefied gas processing system 1. In order to drive the evaporative gas compressor 30 at room temperature, a preheater 50 for changing the evaporating gas at a cryogenic temperature to room temperature is further provided.

The preheater 50 for realizing the above effect will be described later.

The evaporating gas compressor 30 may be a reciprocating type compressor, which has an effect of securing a sufficient installation space as compared with a centrifugal compressor. Compared to a centrifugal compressor for compressing high pressure, 35 bar), which is advantageous in that the power consumption is reduced.

A plurality of evaporative gas compressors 30 may be provided, and an evaporative gas cooler (not shown) may be provided between the evaporative gas compressors 30. When the evaporation gas is pressurized by the evaporation gas compressor 30, the temperature may also rise 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 the evaporative gas compressor 30, and each evaporative gas cooler may be provided downstream of each evaporative gas compressor 30.

As the evaporation gas compressor 30 pressurizes the evaporation gas, the evaporation gas can be in a state where the pressure rises and the boiling point rises and can be liquefied even at a relatively high temperature. Therefore, in the present embodiment, the evaporation gas compressor can be easily liquefied by increasing the pressure of the evaporation gas.

Of course, the pressurization of the evaporating gas is not only for re-liquefaction, but also for supplying to the usable engine at low pressure. In the embodiment of the present invention, the engine is driven by a low pressure rather than an engine driven only by a high pressure. Therefore, the evaporative gas compressor 30 can pressurize the evaporative gas at a low pressure, that is, have.

The re-liquefier 40a is provided on the liquefied gas return line 13 and re-liquefies the evaporated gas. Specifically, the re-liquefier 40a includes a re-liquefying heat exchanger 41a for exchanging heat between the evaporated gas compressed in the evaporating gas compressor 30 and the heat exchange medium, Liquid separator 42a for separating the refrigerant gas into a liquid phase and a vapor phase, and a re-liquefied refrigerant device 43 for supplying a heat exchange medium for re-liquefaction by heat exchange with the evaporation gas.

The re-liquefier 40a can be operated when the amount of evaporative gas generated in the liquefied gas storage tank 10 is larger than the amount of evaporative gas required by the customer 20.

Here, the liquefaction heat exchanger 41a and the gas-liquid separator 42a are provided on the liquefied gas return line 13, and the liquefied refrigerant device 43 can be indirectly connected to the liquefaction heat exchanger 41a.

The re-liquefying heat exchanger 41a can receive the heat exchange medium from the re-liquefied refrigerant device 43. The cold heat of the heat exchange medium cools the evaporation gas and the heat of the evaporation gas heats the heat exchange medium, .

At this time, since the heat exchange medium is heated by receiving heat from the evaporation gas, the heat source is supplied from the evaporation gas. This heat exchange medium can be supplied to the first pre-heater 51, which will be described later, through the re-liquefied refrigerant device 43. [

The gas-liquid separator 42a is capable of separating the vaporized gas re-liquefied from the re-liquefying heat exchanger 41a or the gaseous vaporized gas not refloated into liquid and vapor. At this time, the gas-liquid separator 42a can return the liquid-state re-liquefied evaporated gas to the liquefied gas storage tank 10 through the liquefied gas return line 13. [

The re-liquefying refrigerant system 43 can be indirectly connected to the liquefaction heat exchanger 41a and the first pre-heater 51. [ That is, the re-liquefying refrigerant device 43 is indirectly connected to the first pre-heater 51 through the first heat exchanging medium supply line 431 and is connected to the re-liquefying heat exchanger 41a through the second heat exchanging medium supply line 432, Lt; RTI ID = 0.0 > and / or < / RTI >

Here, the heat exchange medium may include a first heat exchange medium to be supplied to the first pre-heater 51 to be described later, or a second heat exchange medium to be supplied to the re-liquefying heat exchanger 41a. The first heat exchange medium may supply a heat source to the first pre-heater 51 through the heat exchange medium first supply line 431 and the second heat exchange medium may be supplied through the heat exchange medium second supply line 432 to the re-liquefying heat exchanger The cold heat can be supplied to the heat exchanger 41a.

The preheater 50a can preheat the evaporated gas discharged from the liquefied gas storage tank 10 and supply the preheated evaporated gas to the evaporated gas compressor 30. [ The preheater 50a may include a first preheater 51, a second preheater 52 and a control valve 53. [

The first preheater 51 is provided on the first evaporation gas supply line 11 and receives a heat source through a heat exchange medium supplied from a remelting device 40 to be described later. At this time, the first pre-heater 51 may be used prior to the second pre-heater 52, which will be described later.

The first preheater 51 receives the heat source through the first heat exchange medium supplied by the re-liquefied refrigerant device 43 when the re-liquefier 40 is operated, and the first heat exchange medium and the liquefied gas storage tank 10 To the evaporation gas discharged from the evaporator.

The first pre-heater 51 may be connected in parallel to the second pre-heater 52 to receive the selective supply of the evaporative gas according to the opening degree of the control valve 53 to be described later.

The second preheater 52 is provided on the second evaporation gas supply line 12 and can receive a heat source through a heat exchange medium supplied from seawater, fresh water or waste heat. At this time, the second preheater 52 can be used only when the refueling device 40 is not operating.

Here, the waste heat may be the waste heat generated by the customer (20) specifically the gas combustion unit (GCU) or the waste heat generated by the exhaust gas of the DFDE.

The second preheater 52 may include a seawater pump 61 and a seawater line 62 when driven by seawater. In other words, the second pre-heater 52 is connected to the sea water line 62 through which the seawater can be supplied by the sea water pump 61.

The second preheater 52 may preheat the evaporated gas by exchanging heat between the supplied seawater and the evaporated gas discharged from the liquefied gas storage tank 10.

Here, the first pre-heater 51 or the second pre-heater 52 may raise the temperature of the evaporated gas discharged from the liquefied gas storage tank 10 from -10 ° C to -5 ° C and the evaporated gas may be supplied to the evaporative gas compressor 30).

The control valve 53 is provided in a three-way valve structure at a point where the first evaporation gas supply line 11 and the second evaporation gas supply line 12 are connected to each other and the first evaporation gas supply line 11 or the second evaporation gas supply line 12, The supply of the evaporation gas to the supply line 12 can be controlled.

The control valve 53 supplies the evaporation gas discharged from the liquefied gas storage tank 10 to the first evaporation gas supply line 11 when the refueling device 40 is operated and the refueling device 40 is operated It is possible to supply the evaporated gas discharged from the liquefied gas storage tank 10 to the second evaporated gas supply line 12.

Concretely, when the remapping device 40 is operated, the control valve 53 is rich in the heat source generated in the remapping refrigerant device 43, so that the first preheater 51 (indirectly connected to the remapping refrigerant device 43) ) Can be preferentially used.

The control valve 53 closes the opening connected to the second evaporation gas supply line 12 and opens the opening connected to the first evaporation gas supply line 11 when the refueling device 40 is operated, It is possible to prevent the evaporation gas from being supplied to the gas supply line 12 and supply the evaporation gas to the first evaporation gas supply line 11.

When the re-liquefier 40 is not operated, the second pre-heater 52 connected to the other heat source may be used because the heat source generated in the re-liquefier refrigerant device 43 is insufficient.

The control valve 53 opens the opening connected to the second evaporation gas supply line 12 and closes the opening connected to the first evaporation gas supply line 11 to disconnect the first evaporation gas supply line 11, It is possible to prevent the evaporation gas from being supplied to the evaporation gas supply line 11 and to supply the evaporation gas to the second evaporation gas supply line 12. [

As a result, the evaporative gas compressor (30) at room temperature can be installed and used in the embodiment of the present invention, thereby reducing the installation cost. The heat source to be supplied to the preheater 50a can be selectively supplied using the waste heat of the refueling device 40 or the consumer 20 or seawater so that the selectivity of the preheater 50a can be made flexible.

As described above, the liquefied gas processing system 1 according to an embodiment of the present invention can include a compressor that can be used even at room temperature by providing an optional preheater capable of driving efficiently, so that the selectivity of the driving equipment becomes flexible, There is a saving effect.

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, an evaporative gas compressor 30, a re-liquefier 40b, , And a preheater 50b. The configuration excluding the consumer 20, the liquefaction device 40b, and the preheater 50b in the other embodiment of the present invention is the same as the configuration in the liquefied gas processing system 1 according to the embodiment of the present invention, But not necessarily the same configuration.

In another embodiment of the present invention, the evaporation gas branch line 15 and the third evaporation gas supply line 16 may be further included.

The evaporation gas branch line 15 is branched at the downstream end of the evaporation gas compressor 30 and connected to the second customer site 22 to supply the evaporation gas. The third evaporation gas supply line 16 is connected to the gas-liquid separator 42b and the second customer site 22 to supply the evaporative gas.

At this time, an evaporation gas branching valve (not shown) or a third evaporation gas branching valve (not shown) is provided in the evaporation gas branch line 15 and the third evaporation gas supply line 16, Accordingly, the supply amount of the evaporation gas can be adjusted.

Further, in another embodiment of the present invention, the liquefied gas supply line 14 may be further included.

The liquefied gas supply line 14 can supply the liquefied gas stored in the liquefied gas storage tank 10 by connecting the liquefied gas storage tank 10 and the liquefaction unit 40b, Liquid separator 42b to be described later.

The liquefied gas supply line 14 may include a pump 141 and the pump 141 may be provided inside the liquefied gas storage tank 10 to supply the liquefied gas to the gas-liquid separator 42b.

At this time, the liquefied gas supply line 14 includes a liquefied gas supply valve (not shown) so that the supply amount of the liquefied gas can be adjusted according to the opening degree of the valve.

The consumer 20 may include a first consumer 21 and a second consumer 22. The first consumer 21 may be connected to the first evaporation gas supply line 11 to receive the evaporation gas and only the liquefied evaporated gas may be supplied through the re-liquefier 40b described later.

The first consumer 21 may be a DFDE or a gas turbine, and it may be supplied with liquefied evaporative gas only through the re-liquefier 40b.

The second customer 22 may be connected to the evaporation gas branch line 15 or the third evaporation gas supply line 16 to be supplied with the evaporation gas, 40b and can be supplied with the evaporated gas which is not liquefied in the gas-liquid separator 42b through the third evaporative gas supply line 16. [

Here, the second customer 22 may be a gas-fired unit (GCU). If the amount of evaporated gas required by the first customer 21 is larger than the amount of evaporated gas generated by the liquefied gas storage tank 10, It is possible to supply extra evaporation gas (the difference between the evaporation gas required amount of the first consumer 21 and the evaporation gas generation amount of the liquefied gas storage tank 10) in order to prevent an increase in internal pressure of the liquefied gas storage tank 10.

In addition, the customer 20 may have various configurations such as GCU, DFDE, MEGI, XDF (2sDF) engine and boiler.

The re-liquefier 40b re-liquefies the evaporated gas discharged from the evaporative gas compressor 30. At this time, the re-liquefier 40b can supply the liquefied evaporated gas to the customer 20.

The re-liquefier 40b can store the re-liquefied evaporation gas at 25 bar to 35 bar (preferably 30 bar), and can supply the stored re-liquefied vaporized gas to the customer 20 at a pressure condition of 25 bar to 35 bar without decompression have.

Specifically, the re-liquefier 40b includes a re-liquefying heat exchanger 41b for liquefying the evaporation gas compressed in the evaporating gas compressor 30 by heat exchange with the heat exchange medium, a re-liquefaction heat exchanger 41b for liquefying the evaporation gas supplied from the liquefaction heat exchanger 41b, Liquid separator 42b for separating the refrigerant gas into a liquid phase and a vapor phase, and a re-liquefied refrigerant device 43 for supplying a heat exchange medium for re-liquefaction by heat exchange with the evaporation gas.

The re-liquefying heat exchanger 41b is provided on the first evaporation gas supply line 11 and is provided with a heat exchange medium which is supplied from the re-liquefied refrigerant device 43 with evaporative gas of 25 bar to 35 bar discharged from the evaporative gas compressor 30 The evaporation gas can be liquefied by heat exchange.

The re-liquefying heat exchanger 41b is indirectly connected to the re-liquefied refrigerant device 43 and the second heat exchange medium supply line 432 to receive the heat exchange medium. At this time, the heat exchange medium supplied from the re-liquefied refrigerant device 43 can receive a heat source from the evaporated gas compressed from the evaporative gas compressor 30, and the evaporated gas compressed from the evaporative gas compressor 30 can be supplied to the re- The cold source can be supplied from the heat exchange medium supplied from the heat exchanger 43.

The gas-liquid separator 42b is provided on the first evaporation gas supply line 11 and can supply and store the evaporated gas re-liquefied from the re-liquefying heat exchanger 41b. At this time, the gas-liquid separator 42b can store the re-liquefied evaporated gas of 25 to 35 bar (preferably 25 to 30 bar) without decompression, and can directly supply the stored liquefied evaporated gas to the consumer 20 without a separate pump have.

Therefore, in another embodiment of the present invention, the evaporation gas in the state of 25 bar to 35 bar is directly stored in the gas-liquid separator 42b without decompression and supplied to the customer 20 in the above-described state, The construction cost of the processing system 2 is saved, and the installation space of the liquefied gas processing system 2 can be easily secured.

The gas-liquid separator 42b can further receive the liquefied gas from the liquefied gas storage tank 10 through the liquefied gas supply line 14 when the amount of evaporation gas generated is smaller than the required amount of liquefied gas in the customer 20, It is possible to supply the liquid vapor gas to the first consumer 21 in the consumer 20 in detail.

The gas-liquid separator 42b can supply the evaporated gas in the vapor phase, which has not been liquefied, to the second consumer 22 in detail. The vaporized gas supply to the second customer 22 can be performed only in an emergency in which the internal pressure of the liquefied gas storage tank 10 rises.

The re-liquefying refrigerant device 43 may be indirectly connected to the pre-heater 50b through the heat exchange medium first supply line 431 and may be indirectly connected through the re-liquefying heat exchanger 41b and the heat exchange medium second supply line 432 Can be indirectly connected.

The heat exchange medium may include a first heat exchange medium supplied to the preheater 50b and a second heat exchange medium supplied to the liquefaction heat exchanger 41b.

The preheater 50b can preheat the evaporated gas supplied from the liquefied gas storage tank 10 through the heat exchange medium supplied from the re-liquefied refrigerant device 43. [

The preheater 50b is provided between the liquefied gas storage tank 10 and the evaporative gas compressor 30 on the first evaporation gas supply line 11 and is connected to the re-liquefied refrigerant device 43 and the heat exchange medium first supply line 431 ). ≪ / RTI >

The preheater 50b exchanges the heat exchange medium supplied through the liquefied refrigerant device 43 and the evaporated gas discharged from the liquefied gas storage tank 10 when the refill liquor 40b operates, It is possible to supply the preheated vapor gas to the evaporator.

At this time, the evaporation gas may be preheated to a temperature of about minus 10 degrees Celsius to minus 5 degrees Celsius.

In the embodiment of the present invention, a heater 70 may be further included. The heater 70 is disposed between the gas-liquid separator 42b and the consumer 20 on the first evaporation gas supply line 11 and supplies the liquefied evaporated gas discharged from the gas-liquid separator 42b to the consumer 20 Lt; / RTI >

As described above, the liquefied gas processing system 2 according to another embodiment of the present invention is a system for directly processing a liquefied gas at a pressure required by the customer 20 through a gas-liquid separator 42b for separating and storing the liquefied gas at a pressure required by the customer 20 So that the pump 2 is unnecessary, so that the construction cost of the system 2 can be saved and the installation space for the system 2 can be sufficiently secured.

3 is a conceptual diagram of a gas-liquid separator in a liquefied gas processing system according to the present invention.

3, the gas-liquid separator 42 according to the embodiment of the present invention includes a housing 421 and an impurity separator 422. In the embodiment of the present invention, the first evaporation gas supply line 11, the liquefied gas return line 13, the liquefied gas supply line 14, and the like are provided in the liquefied gas processing system 1 according to the embodiment of the present invention, In the liquefied gas processing system 2 according to another embodiment of the present invention, the same reference numerals are used for the respective constructions and the like, but they are not necessarily referred to as the same constructions.

The housing 421 is formed with a space and surrounds the space.

The housing 421 may be formed of a material capable of withstanding a pressure of approximately 25 bar to 35 bar (preferably 30 bar) and may be supplemented with a stiffener to withstand such pressure.

The housing 421 can store liquid vapor or gaseous vapor, and can have a pressure vessel shape. It is also possible to store not only the evaporation gas but also the impurities (preferably oil) used in the evaporative gas compressor 30.

The housing 421 may have an inlet (not shown) for allowing evaporation gas or impurities to flow into the side surface, and may include an impurity separator 422 to be described later. The impurity separator 422 will be described in detail below.

The inlet may be provided on the upper side or the upper side of the gas-liquid separator 42 and may be supplied with the evaporation gas, liquefied gas, or impurities through the first evaporation gas supply line 11 or the liquefied gas supply line 14.

The housing 421 may have a discharge port (not shown) for discharging liquefied evaporative gas, and the discharge port includes a first discharge port and a second discharge port.

The first discharge port is provided on the upper side of the impurity separating device 422 to be described later to discharge the liquid evaporative gas present inside the housing 421 to the outside of the housing 421. Here, the first discharge port can supply the liquid evaporated gas to the liquefied gas storage tank 10 through the liquefied gas return line 13.

At this time, when liquid evaporation gas is supplied together with the impurities to the liquefied gas storage tank 10, wax may be formed in the liquefied gas storage tank 10 so that the driving of the liquefied gas processing systems 1 and 2 And can cause a fatal blow to the pipeline formed in the liquefied gas processing system 1, 2. In severe cases, the liquefied gas treatment system 1, 2 may be destroyed.

Therefore, in the embodiment of the present invention, the gas-liquid separator 42 is provided with the impurity separating device 422 to be described later so that no impurities are added to the liquefied gas storage tank 10. Therefore, the durability of the liquefied gas storage tank 10 can be improved to prolong the service life, and the driving reliability of the liquefied gas processing system 1, 2 can be improved.

Further, since the evaporative gas compressor (30) using oil can be provided, the selectivity of the constituent devices of the liquefied gas processing system (1, 2) can be made flexible and the evaporative gas can be compressed at a high pressure, There is an effect that can be anger.

The second discharge port is provided below the impurity separator 422 to discharge the evaporation gas or impurities in the liquid inside the housing 421 to the outside of the housing 421.

Here, the second discharge port can supply liquid vapor gas or impurities to the customer 20 through the first vapor gas supply line 11. [

That is, the stored product stored in the gas-liquid separator 42 is a mixture of liquefied evaporated gas and impurities. At this time, the impurities are precipitated at a high density and beneath the liquefied evaporated gas.

Therefore, the gas-liquid separator 42 is capable of separating the first discharge port from the liquefied gas storage tank 10 so as to supply pure liquefied evaporated gas to the liquefied gas storage tank 10 because impurities are contained in the liquefied gas storage tank 10, So that the impregnated impurities can be prevented from being supplied to the liquefied gas storage tank 10.

Since the gas or liquid separator 42 is provided under the impurity separator 422 with the second discharge port so that impurities precipitated in the engine or the like of the consumer 20 are mixed with the consumer 20 You can enter it.

The impurity separator 422 is provided on one side of the housing 421 to separate impurities from the evaporated gas. Specifically, the impurity separation device 422 includes a fixing portion 4221, a filtering portion 4222, a rotating portion 4223, or a translating portion 4224.

The fixing portion 4221 may be connected to one side of the housing 421 to fix the impurity separating device 422 to the housing 421. [ The size of the fixing portion 4221 is not limited and can be freely configured as long as it is defined only within the area of the housing 421 of the gas-liquid separator 42.

The filtering section 4222 can protrude from the fixing section 4221 toward the other side of the housing 421 facing the fixing section 4221. [ The filtering section 4222 may be integrally formed and connected to the rotating section 4223 to be described later and indirectly connected to the fixing section 4221 and may be deflected upward or downward from the fixing section 4221 by the rotating section 4223 (Not shown) for fixing the first folding portion (not shown) and the rotating portion 4223 and the fixing portion 4221. The second folding portion (not shown)

The rotating portion 4223 can rotate the filtering portion 4222 so as to be deflected upward or downward from the fixing portion 4221. [ The rotating portion 4223 can be provided between the filtering portion 4222 and the fixing portion 4221 to connect the filtering portion 4222 to the fixing portion 4221 together with the rotation of the filtering portion 4222, (Specifically, the rotating portion 4223 may be provided between the first filtering portion and the second filtering portion).

The translating portion 4224 is provided between the fixing portion 4221 and the filtering portion 4222 so that the filtering portion 4222 can be moved up and down. In this case, the translating portion 4224 may be formed in the form of a rail or in a sawtooth shape.

The translating portion 4224 can move the filtering portion 4222 upward or downward depending on the level of the liquid evaporating gas stored in the gas-liquid separator 42 or depending on the position of the impurities to be precipitated.

Thus, the gas-liquid separator 42 according to the present invention is provided with the impurity separating device 422 so that the liquefied gas returning to the liquefied gas storage tank 10 can be prevented from containing impurities or oil, ) Is increased in durability and stability.

Further, the driving reliability of the liquefied gas processing system (1, 2) is improved, and a compressor using oil can be used, so that the range of selection of the construction equipment can be widened and the compression range can be widened, Can be increased.

1,2: liquefied gas processing system 10: liquefied gas storage tank
11: first evaporation gas supply line 12: second evaporation gas supply line
13: liquefied gas return line 14: liquefied gas supply line
141: Pump 15: Evaporative gas branch line
16: Third evaporation gas supply line 20: Demand source
21: first customer 22: second customer
30: Evaporative gas compressor 40a, 40b: Re-liquefying device
41a, 41b: Re-liquefying heat exchanger 42a, 42b:
421: housing 422: impurity separator
4221: fixing part 4222:
4223: rotating part 4224:
43: Re-liquefied refrigerant device 431: Heat exchange medium first supply line
432: Heat exchange medium second supply line 50a, 50b: Preheater
51: first preheater 52: second preheater
53: Control valve 61: Seawater pump
62: sea water line 70: heater

Claims (14)

A housing formed with a space and surrounding the space;
An inlet port through which evaporative gas or impurities are introduced into the housing;
An impurity separating device provided on one side of the housing for separating the impurities from the evaporated gas;
A first discharge port provided on the upper side of the impurity separating apparatus to discharge a liquid-phase evaporative gas existing in the housing to the outside of the housing; And
And a second discharge port provided below the impurity separating device for discharging evaporative gas or impurities in a liquid state existing in the housing to the outside of the housing,
Wherein the impurity separating device comprises:
Liquid separator is formed below the first discharge port and in parallel with an inflow direction of the first discharge port to remove impurities in the liquid evaporative gas discharged to the first discharge port. The apparatus according to claim 1,
A fixing part connected to and fixed to one side of the housing; And
And a filtering portion protruding from the fixing portion toward the other side of the housing facing the fixing portion. The apparatus according to claim 2,
Further comprising a translating portion provided between the fixing portion and the filtration portion and capable of moving the filtration portion up and down. The apparatus according to claim 2,
Further comprising a rotating portion for rotating the filtration portion such that the filtration portion is deflected upward or downward from the fixed portion. 5. The apparatus according to claim 4,
Wherein the gas-liquid separator is provided between the filtering section and the fixing section. The washing machine according to claim 4,
A first deflecting portion deflected upward or downward from the fixing portion by the rotating portion; And
And a second filtration part for fixing the rotating part and the fixing part. The apparatus according to claim 2,
A translating part provided between the fixing part and the filtering part and capable of moving the filtering part up and down; And
Further comprising a rotating portion for rotating the filtration portion such that the filtration portion is deflected upward or downward from the fixed portion. The ink cartridge according to claim 1,
Supplying the liquid vapor gas to the liquefied gas storage tank,
The second discharge port
Liquid separator for supplying the liquid-phase evaporation gas or the impurities to the engine. A first evaporation gas supply line connected from the liquefied gas storage tank to the customer;
An evaporative gas compressor provided on the first evaporative gas supply line and compressing the evaporative gas;
A second evaporation gas supply line branched on the first evaporation gas supply line at a front end of the evaporation gas compressor;
A re-liquefying device for re-liquefying the evaporated gas;
A first preheater provided on the first evaporation gas supply line; And
And a second preheater provided on the second evaporation gas supply line,
The first pre-
A heat source is supplied through the refrigerant supplied from the remelting device, and is used preferentially to the second preheater,
The remelting device comprises:
A re-liquefied refrigerant apparatus for supplying a heat exchange medium;
A re-liquefying heat exchanger for exchanging heat between the evaporated gas compressed in the evaporative gas compressor and the heat exchange medium; And
And a gas-liquid separator for separating the vaporized gas supplied from the redistribution heat exchanger into a liquid phase and a vapor phase,
The gas-
A housing formed with a space and surrounding the space;
An inlet port through which evaporative gas or impurities are introduced into the housing;
An impurity separating device provided on one side of the housing for separating the impurities from the evaporated gas;
A first discharge port provided on the upper side of the impurity separating apparatus and discharging evaporative gas existing in the housing to the outside of the housing; And
And a second discharge port provided below the impurity separating device for discharging evaporative gas or impurities existing in the housing to the outside of the housing,
Wherein the impurity separating device comprises:
Wherein the first discharge port is formed to be parallel to an inflow direction of the first discharge port so as to remove impurities in the liquid evaporation gas discharged to the first discharge port. 10. The apparatus according to claim 9, wherein the first discharge port
Supplying the liquid vapor gas to the liquefied gas storage tank,
The second discharge port
And the evaporation gas or the impurity in the liquid phase is supplied to the customer. 10. The evaporative gas compressor according to claim 9,
And compressing and discharging the evaporation gas entering from -10 deg. To -5 deg. To 25 bar to 30 bar. An evaporative gas supply line connected from the liquefied gas storage tank to the customer;
An evaporative gas compressor provided on the evaporative gas supply line and compressing the evaporative gas; And
And a re-liquefying device for re-liquefying the evaporated gas discharged from the evaporative gas compressor,
The above-
The evaporation gas is supplied from the redistribution device,
The remelting device comprises:
A re-liquefied refrigerant apparatus for supplying a heat exchange medium;
A re-liquefying heat exchanger for exchanging heat between the evaporated gas compressed in the evaporative gas compressor and the heat exchange medium; And
And a gas-liquid separator for separating the vaporized gas supplied from the redistribution heat exchanger into a liquid phase and a vapor phase,
The gas-
A housing formed with a space and surrounding the space;
An inlet port through which evaporative gas or impurities are introduced into the housing;
An impurity separating device provided on one side of the housing for separating the impurities from the evaporated gas;
A first discharge port provided on the upper side of the impurity separating apparatus and discharging evaporative gas existing in the housing to the outside of the housing; And
And a second discharge port provided below the impurity separating device for discharging evaporative gas or impurities existing in the housing to the outside of the housing,
Wherein the impurity separating device comprises:
Wherein the first discharge port is formed to be parallel to an inflow direction of the first discharge port so as to remove impurities in the liquid evaporation gas discharged to the first discharge port. 13. The apparatus according to claim 12, wherein the first discharge port
Supplying the liquid vapor gas to the liquefied gas storage tank,
The second discharge port
And the evaporation gas or the impurity in the liquid phase is supplied to the customer. 13. The evaporative gas compressor according to claim 12,
Compressing and discharging the evaporation gas entering from -10 ° C to + 5 ° C at a pressure of 25 bar to 30 bar,
The remelting device comprises:
And the evaporation gas of 25 to 30 bar is supplied to the customer.

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