KR20180064777A - Gas treatment system and ship having the same - Google Patents

Abstract

The present invention relates to a gas treatment system and a vessel, comprising: a liquefied gas storage tank for storing a liquefied gas; A forced vaporizer for vaporizing the liquefied gas in the liquefied gas storage tank; A mist separator provided downstream of the forced vaporizer for vapor-liquid separating the vaporized liquefied gas; A heater disposed downstream of the mist separator for heating a gas component separated by the mist separator and delivering the gas component to a customer; And a liquid phase supply unit for transferring the liquid component separated from the mist separator to the consumer and thereby consuming the liquid component.

Description

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

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

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

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

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

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

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

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a high pressure engine which is capable of consuming heavy carbon at a consumer site when separating heavy carbon from a liquefied gas, Gas returning to the liquefied gas storage tank to prevent the methane charge of the liquefied gas storage tank from dropping.

A gas treatment system according to an embodiment of the present invention includes a liquefied gas storage tank for storing a liquefied gas; A forced vaporizer for vaporizing the liquefied gas in the liquefied gas storage tank; A mist separator provided downstream of the forced vaporizer for vapor-liquid separating the vaporized liquefied gas; A heater disposed downstream of the mist separator for heating a gas component separated by the mist separator and delivering the gas component to a customer; And a liquid phase supply unit for transferring the liquid component separated from the mist separator to the consumer and thereby consuming the liquid component.

Specifically, the liquid-phase supply unit may include an auxiliary vaporizer for vaporizing the liquid component and delivering it to the customer.

Specifically, the mist separator separates the heavy carbon from the liquefied gas, and the liquid supply unit can deliver the heavy carbon to the customer.

Specifically, the customer includes: a first customer who receives the gas component; And a second consumer that receives the liquid component together with or in place of the gas component.

Specifically, the first customer may be an XDF engine or a DFDE engine.

Specifically, the second demander may be a boiler.

Specifically, the liquid-phase supply unit can deliver the liquid component to the consumer as the pressure of the gas component that the heater transfers to the customer.

Specifically, the liquid-phase supply unit can deliver the liquid component to the customer without additional compression.

Specifically, the gas component transferred to the first customer and the liquid component transferred to the second customer can have the same pressure.

A gas processing system according to an embodiment of the present invention includes a gas component supply line connected to a customer in a liquefied gas storage tank for storing liquefied gas and provided with a forced vaporizer, a mist separator, and a heater; And a liquid component supply line branched from the mist separator in the gas component supply line and connected to the customer, wherein the liquid component supply line delivers the liquid component separated from the mist separator to the customer do.

Specifically, the liquid component supply line can deliver the liquid component to the consumer without any additional compression.

Specifically, the customer includes: a first customer who receives the gas component; And a second consumer that receives the liquid component together with or in place of the gas component.

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

The gas treatment system and the ship according to the present invention can be used in a gas treatment system and a ship in which when the liquefied gas is supplied to the XDF, DFDE or the like through forced vaporization, heavy carbon separation or heating, the heavy carbon separated from the liquefied gas is returned to the liquefied gas storage tank, The methane price in the liquefied gas storage tank can be guaranteed.

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

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, a gas treatment system of the present invention will be described, and the present invention includes a gas treatment system and a vessel having the gas treatment system.

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, .

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

1, a gas processing system 1 according to a first embodiment of the present invention includes a liquefied gas storage tank 10, a forced vaporizer 20, a mist separator 30, a heater 40, (50).

The liquefied gas storage tank 10 stores liquefied gas to be supplied to the customer 100. The liquefied gas storage tank 10 must store the liquefied gas in a liquid state, wherein the liquefied gas storage tank 10 can store the liquefied gas at a pressure of 1 bar to 10 bar (1.03 bar, for example).

The liquefied gas storage tank 10 may be a stand-alone type, a membrane type, a pressurized type, and the like. The liquefied gas may be stored in a liquid state using various heat insulating structures. It may be discharged to the outside to be liquefied and then returned or consumed to prevent overpressure of the gas storage tank 10.

The customer 100 receiving the liquefied gas from the liquefied gas storage tank 10 includes a low pressure engine (XDF, DFDE, DFDG, etc.) using a low pressure gas such as 1 bar to 50 bar, a boiler, a GCU, a turbine . Of course, the type of the consumer 100 is not limited to the above, and the consumer 100 in the present invention can be used to cover all configurations consuming the liquefied gas.

It is noted that the low pressure means a relatively low value relative to the required pressure (200 to 400 bar) of the engine, which is generally referred to as a high-pressure engine, such as the MEGI engine, and does not represent an absolute value.

The demander 100 may include a first demander 110 and a second demander 120. The first demander 110 may receive gas components separated from the mist separator 30 to be described later, Engine or DFDE engine.

On the other hand, the second customer 120 may receive the liquid component together with the gas component separated from the mist separator 30, but may be a boiler, a GCU, or the like, but is not limited thereto.

However, the first customer 110 and the second customer 120 can receive the liquefied gas having the same pressure. For example, the gas component delivered to the first customer 110 and the gas component transferred to the second customer 120 The liquid component may have the same pressure.

A liquefied gas pump (11) may be provided in the liquefied gas storage tank (10). The liquefied gas pump 11 may be a submerged pump provided inside the liquefied gas storage tank 10 and the liquefied gas pump 11 may be provided inside and / Of course.

The liquefied gas pump 11 discharges the liquefied gas stored in the liquefied gas storage tank 10 to the outside and transfers the liquefied gas to the forced vaporizer 20. The liquefied gas pump 11 may pressurize the liquefied gas and deliver it to the forced vaporizer 20 where the liquefied gas pressurized by the liquefied gas pump 11 may have a pressure of 1 to 50 bar, ). ≪ / RTI >

In this embodiment, a separate pressurizing structure may not be provided between the liquefied gas pump 11 and the customer 100. [ The liquefied gas pump 11 needs to pressurize the liquefied gas up to the required pressure of the customer 100 so that the liquefied gas pump 11 can be regulated to correspond to the required pressure of the consumer 100 .

The forced vaporizer 20 forcibly liquefies the liquefied gas in the liquefied gas storage tank 10. The forced vaporizer 20 can heat the liquefied gas to a temperature equal to or higher than the boiling point by using various heat sources which are not particularly limited.

The forced vaporizer 20 can heat the liquefied gas to about -100 degrees. This may be a temperature higher than the boiling point of the liquefied gas but lower than the temperature required by the customer 100. The forced vaporizer 20 heats the liquefied gas to such a temperature is for the adjustment of methane price.

For example, when the liquefied gas is liquefied natural gas, liquefied gas is mixed with methane as well as heavy carbon such as propane and butane. Since the boiling point of butane and heavy carbon does not exceed -100 degree, the forced vaporizer 20 can heat the liquefied gas so that the heavy carbon remains in a liquid state and the methane and nitrogen are changed to gas phase.

In this case, only part of the liquefied gas passing through the forced vaporizer 20 may be in the gaseous state, and the remaining (heavy carbon) may remain in the liquid state. At this time, the component remaining in the liquid state can be separated from the mist separator 30.

The mist separator 30 is provided downstream of the forced vaporizer 20 and separates the vaporized liquefied gas by gas-liquid separation. The mist separator 30 can separate the heavy carbon, which is a liquid component remaining in the liquid state in the liquefied gas heated in the forced vaporizer 20, and the separated liquid component can be delivered to the consumer 100 and consumed.

In the conventional case, it is common to separate the heavy carbon and return it to the liquefied gas storage tank 10. However, as the proportion of heavy carbon containing propane and butane increases, it affects the lowering of the methane price. Therefore, heavy carbon is continuously returned to the liquefied gas storage tank 10, There is a possibility that the methane price of the liquefied gas storage tank 10 may be lowered as the concentration of carbon increases.

In this case, when the liquefied gas in the liquefied gas storage tank 10 is supplied to the demand place 100, the operation efficiency of the demand place 100 may be lowered. When the demand place 100 is an engine, malfunction.

However, in this embodiment, since the liquid component separated from the mist separator 30 is transmitted to the customer 100 while the gas component separated from the mist separator 30 is delivered to the customer 100, the mist separator 30 It is possible to prevent the heavy carbon, which is a separated liquid component, from returning to the liquefied gas storage tank 10.

The customer 100 through which the gas component is delivered may be a first customer 110 such as an engine as described above and the customer 100 through which the liquid component is delivered may be a second customer 120 such as a boiler The second customer 120 may be a customer 100 that is not affected by the methane price of the fuel unlike the first customer 110 and the gas component may be transmitted to the second customer 120 together with the liquid component.

Therefore, in the present embodiment, when heavy carbon is separated in the course of the liquefied gas being delivered to the first consumer 110 such as a low-pressure engine, heavy carbon is consumed, The problem of deterioration of methane can be solved.

In addition, since the methane price of the liquefied gas storage tank 10 can be kept constant, this embodiment can increase the system operation efficiency by supplying liquefied gas having a constant methane price to the customer 100 as fuel.

The heater 40 is provided downstream of the mist separator 30 and heats the gas component separated by the mist separator 30 and transfers it to the customer 100. [ As described above, the forced vaporizer 20 heats the liquefied gas to vaporize, but can heat to a temperature lower than the required temperature of the consumer 100 for separation of heavy carbon. Thus, the heater 40 can raise the gas component separated from the liquid component (heavy carbon) in the mist separator 30 to the required temperature of the consumer 100.

The heat source used in the heater 40 may be a heat source used in the forced vaporizer 20 or a separately provided heat source. In the present embodiment, configurations requiring a heat source may share the heat sources with each other. Of course, the kind of the heat source and whether or not it is shared in the present invention are not particularly limited.

The gas component supply line 60 may be connected from the liquefied gas storage tank 10 to the first customer 110 and the gas component supply line 60 may be connected to the forced vaporizer 20, the mist separator 30, the heater 40 Can be provided side by side.

Therefore, the liquefied gas discharged from the liquefied gas pump 11 is partially vaporized in the forced vaporizer 20, separated into the gas component and the liquid component in the mist separator 30, and the gas component is heated by the heater 40 .

The liquid-phase supply unit 50 transfers the liquid component separated from the mist separator 30 to the consumer 100 so that the liquid-consuming unit 100 consumes all the liquid components. The liquid-phase supply unit 50 can deliver the heavy carbon, which is a liquid component, to the consumer 100. For example, the heavy carbon can be delivered to the second consumer 120 of the consumer 100. [

The liquid-phase supply unit 50 may include an auxiliary vaporizer 51 for vaporizing the liquid component and delivering it to the consumer 100. [ The auxiliary vaporizer 51 can heat the liquid component using the heat source used in the forced vaporizer 20 and / or the heater 40 described above or a separate heat source. The heat source used in the auxiliary vaporizer 51 is a heater It can be shared with the heat source used in the heat exchanger 40 or the like.

The liquid supply portion 50 can deliver the liquid component to the consumer 100 in the same manner as the pressure of the gas component transmitted by the heater 40 to the consumer 100. [ This may mean that the liquid-phase supply unit 50 delivers the liquid component to the consumer 100 without further compression.

As described above, the forced vaporizer 20, the mist separator 30, the heater 40, and the like are provided from the downstream of the liquefied gas pump 11 to the customer 100, but a pump or a compressor for increasing the pressure is not provided . Therefore, the gas component separated by the mist separator 30 can be delivered to the customer 100 without changing the pressure (although, of course, the flow rate may be controlled by a valve (not shown) May be omitted in this specification).

The liquid phase supply unit 50 can also transfer the liquid component separated from the mist separator 30 to the consumer 100 without further compression and therefore can supply the liquid component branched from the mist separator 30 to the consumer 100 The gas components can be introduced into the customer 100 with the same pressure.

The liquid component supply line 70 may be connected to the customer 100 from the mist separator 30 and the liquid component supply line 70 may be branched from the mist separator 30 provided in the gas component supply line 60, 2 consumer 120, and the auxiliary vaporizer 51 of the liquid-phase supply unit 50 may be provided.

The flow of the liquefied gas flows from the liquefied gas pump 11 to the gas component supply line 60 through the forced vaporizer 20 and the mist separator 30 along the gas component supply line 60, To the first customer 110 or the second customer 120 or to the second customer 120 along the liquid component supply line 70.

At this time, the liquefied gas flowing along the liquid component supply line 70 is not always in a liquid state in the liquid component supply line 70, and the liquid component supply line 70, which is connected between the mist separator 30 and the second customer, The liquefied gas upstream of the auxiliary vaporizer 51 may be in a liquid state and the liquefied gas downstream may be in a gaseous state.

That is, in the present invention, the liquid component supply line 70 is merely configured to deliver the liquid component separated from the mist separator 30 to the second customer 120, and must maintain the liquid state in the process of transferring the liquid component Please note that this may not be a configuration.

As described above, according to the present embodiment, the methane price of the liquefied gas storage tank 10 is lowered by consuming the heavy carbon separated from the mist separator 30 in the consumer 100 instead of returning the liquefied gas to the liquefied gas storage tank 10 It is possible to maintain the system stability by keeping the methane constant.

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

Referring to FIG. 2, the gas processing system 1 according to the second embodiment of the present invention may be different from the gas component supply line 60 according to the first embodiment described above. Hereinafter, the present embodiment will be mainly described with respect to differences from the other embodiments, and the description omitted will be replaced with the preceding contents.

In this embodiment, the gas component supply line 60 may be connected only to the first customer 110 without being connected to the second customer 120. Therefore, the second customer 120 can receive and consume only the liquid component instead of the gas component.

The gas component supply line 60 is also connected to the second customer 120 so that the liquid component supply line 70 joins the gas component supply line 60 and supplies the liquid component Since the gas component supply line 60 is not connected to the second customer 120 in the present embodiment, the liquid component supply line 70 is branched from the mist separator 30 and then supplied to the gas component supply line 60 and may be directly connected to the second demander 120.

The gas component supply line 60 and the liquid component supply line 70 may be provided independently from the mist separator 30 to the customer 100. At this time, The liquified gas flowing along the gas component supply line 60 and the liquid component supply line 70, respectively, may have the same pressure.

As in the first embodiment, there is no compressor or pump between the mist separator 30 and the first demander 110 and no compressor or pump is provided between the mist separator 30 and the second demander 120 Because.

That is, in this embodiment, the mist separator 30 is disposed to supply the liquefied gas whose methane content is controlled to the first customer 110, such as a low-pressure engine, so that heavy carbon is consumed to separate the liquefied gas from the liquefied gas storage tank 10, It is possible to prevent unnecessary waste of money by preventing the addition of a pump or a compressor in the process of transferring the heavy carbon to the second customer 120, have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: Gas treatment system 10: Liquefied gas storage tank
11: liquefied gas pump 20: forced vaporizer
30: mist separator 40: heater
50: liquid phase supply part 51: auxiliary vaporizer
60: gas component supply line 70: liquid component supply line
100: Demand point 110: Demand point 1
120: Second customer

Claims (13)

A liquefied gas storage tank for storing liquefied gas;
A forced vaporizer for vaporizing the liquefied gas in the liquefied gas storage tank;
A mist separator provided downstream of the forced vaporizer for vapor-liquid separating the vaporized liquefied gas;
A heater disposed downstream of the mist separator for heating a gas component separated by the mist separator and delivering the gas component to a customer; And
Further comprising a liquid supply portion for delivering the liquid component separated from the mist separator to the customer and consuming the liquid component. The apparatus according to claim 1,
And an auxiliary vaporizer for vaporizing the liquid component and delivering the liquid component to the customer. The method according to claim 1,
The mist separator separates the heavy carbon from the liquefied gas,
Wherein the liquid-phase supply unit delivers the heavy carbon to the customer. The system according to claim 1,
A first customer who receives the gas component; And
And a second customer that receives the liquid component together with or in place of the gas component. 5. The system according to claim 4,
XDF engine or a DFDE engine. 5. The system according to claim 4,
Wherein the boiler is a boiler. The apparatus according to claim 1,
Wherein the heater transfers the liquid component to the demanding party in the same manner as the pressure of the gas component delivered to the customer. The apparatus according to claim 1,
And the liquid component is delivered to the customer without additional compression. 5. The method of claim 4,
Wherein the gas component delivered to the first customer and the liquid component delivered to the second customer have the same pressure. A gas component supply line connected to a customer from a liquefied gas storage tank for storing liquefied gas and provided with a forced vaporizer, a mist separator, and a heater; And
And a liquid component supply line branched from the mist separator in the gas component supply line and connected to the customer,
Wherein the liquid component supply line includes:
And delivering the liquid component separated from the mist separator to the customer. 11. The liquid container according to claim 10,
And the liquid component is delivered to the customer without additional compression. 11. The system according to claim 10,
A first customer who receives the gas component; And
And a second customer that receives the liquid component together with or in place of the gas component. A ship having the gas treatment system according to any one of claims 1 to 12.

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