KR20200000295U - Regasification apparatus of Gas and Ship having same - Google Patents

Abstract

Gas regasification apparatus according to an embodiment of the present invention, the gas regasification apparatus having a housing surrounding at least a portion of the regasification units for regasifying the gas, the housing, the cross-sectional side of the 'b' shape It is formed, the protruding portion is formed to face forward, characterized in that it has an opening for circulating the inside by natural flow without the circulation device driven through a separate power.

Description

Regasification apparatus and ship having same {Regasification apparatus of Gas and Ship having same}

The present invention relates to a gas regasification apparatus and a ship having the same.

As environmental regulations have recently been tightened, the use of liquefied natural gas (Liquefied Natural Gas), which is close to an environmentally friendly fuel, is increasing among various fuels. Liquefied natural gas is generally carried by LNG carriers, where the natural gas can be stored in the tank of the LNG carrier in a liquid state by lowering the temperature below -162 ° C under 1 atm. When liquefied natural gas becomes a liquid state, since the volume is reduced to one-sixth of a sixth of a gaseous state, transportation efficiency may increase.

However, liquefied natural gas is generally consumed in a gaseous state rather than a liquid state, and thus, a liquefied natural gas stored and transported in a liquid phase needs to be regasified, so a regasification plant is used.

If the vessel does not have regasification, BOG (Boil-Off Gas) must be released to the atmosphere, which can cause environmental pollution.

At this time, the regasification facility is LNG carrier, FLNG. It may be mounted on a ship such as FSRU or provided on land, and the regasification facility realizes regasification by heating liquefied natural gas using a heat source such as seawater or glycol.

However, the liquid liquefied natural gas is placed in a cryogenic state close to -160 ℃ and has a strong explosive and classified as a dangerous material, there is a safety problem. In addition, liquid liquefied natural gas is easily evaporated to produce an evaporated gas, there was a great difficulty in handling dangerous and unstable substances.

Therefore, in recent years, in the process of regasifying the liquefied natural gas stored in the liquid phase, a lot of research and development has been made for the stable handling and processing of various components.

The present invention was created to improve the prior art, and an object of the present invention is to provide a gas regasification apparatus and a vessel having the same for improving safety through structural changes of the gas regasification apparatus.

Gas regasification apparatus according to an embodiment of the present invention, the gas regasification apparatus having a housing surrounding at least a portion of the regasification unit for regasifying the gas, the housing, the cross-sectional side of the 'b' shape It is formed, the protruding portion is formed to face forward, characterized in that it has an opening for circulating the inside by natural flow without the circulation device driven through a separate power.

Specifically, a plurality of openings may be formed only on the front surface of the housing.

Specifically, the housing, the upper portion having the projecting portion; And a lower portion connecting the protruding portion and the upper deck, and the opening portion may be formed at the lower portion more than the upper portion.

Specifically, the upper portion may be formed on the outer side when the opening is viewed from the front.

Specifically, the regasification units may be arranged in the bow portion.

Specifically, the regasification unit, the suction drum for temporarily storing the liquefied gas stored in the liquefied gas storage tank; A pump configured to pressurize and receive a liquefied gas from the suction drum; And a vaporizer that receives the liquefied gas from the pump and regasifies the gas, wherein the housing is formed to surround the pump and the vaporizer, and the suction drum may be disposed outside the housing.

Specifically, the suction drum may be disposed at the rear of the housing and disposed on the trunk deck.

Specifically, the housing may be formed spaced apart from the trunk deck at a predetermined interval.

Specifically, the housing may be provided with a drip tray for temporarily storing the liquefied gas leaked in the lower portion.

Specifically, the opening may include a front opening formed in plural on the front of the housing; And an access opening formed on a side of the housing to allow an operator access.

Specifically, the access opening may have a form in which the upper side and the lower side are formed in a semicircular shape and connected in a straight line.

Specifically, it may be a ship comprising the gas regasification device.

Gas regasification apparatus according to the present invention, by forming a circular opening in the housing that accommodates the gas regasification apparatus to achieve a natural ventilation through the air introduced from the outside without establishing a separate ventilation device, the construction cost is It has the effect of saving energy, improving safety, and increasing energy efficiency.

1 is a conceptual diagram of a ship having a gas regasification device according to an embodiment of the present invention.
2 is a front view of a gas regasification apparatus according to an embodiment of the present invention.
3 is a side view of a gas regasification apparatus according to an embodiment of the present invention.
4 is a side conceptual view of a gas regasification device according to an embodiment of the present invention.
5 is a diagram illustrating a ventilation experiment in a conventional gas regasification apparatus.
6 is an experimental view of the ventilation of the gas regasification apparatus according to the embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings. In the present specification, in adding reference numerals to the components of each drawing, it should be noted that the same components as possible, even if displayed on different drawings have the same number as possible. In addition, in describing the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, in the present specification, liquefied gas may be used to encompass all gaseous fuels which are generally stored in a liquid state such as LNG or LPG, ethylene, ammonia, and the like, and may mean LNG (Liquefied Natural Gas). For example, the liquid may be expressed as a liquefied gas for the sake of convenience. This can be applied to the boil off gas as well.

In addition, LNG may be used for the purpose of encompassing not only liquid NG (Natural Gas) but also supercritical NG for convenience, and boil-off gas means BOG (Boil Off Gas), which is naturally vaporized LNG, and gaseous state. It can be used to include not only the boil off gas but also liquefied boil off gas.

Liquefied gas can be referred to regardless of the change of state, such as liquid state, gas state, liquid and gas mixed state, supercooled state, supercritical state, etc., it is also known that evaporated gas is the same. In addition, the present invention is not limited to the liquefied gas to be treated, it may be a liquefied gas processing device and / or boil-off gas processing device, it is apparent that the devices in each of the drawings to be carried out can be applied to each other.

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

1 is a conceptual diagram of a ship having a gas regasification device according to an embodiment of the present invention.

As shown in FIG. 1, a vessel 1 having a gas regasification apparatus according to an embodiment of the present invention includes a liquefied gas storage tank 10, a gas regasification apparatus 20, and a liquefied gas supply apparatus 30. ).

The vessel 1 is a liquefied gas regasification vessel in which a gas regasification apparatus 20 is installed in a liquefied gas carrier ship 1 in order to regasify liquefied gas at sea so that liquefied gas can be supplied to a land terminal. LNG RV) or floating liquefied gas storage and regasification plant (FSRU).

The ship 1 provided with the gas regasification apparatus 20 is equipped with the liquefied gas storage tank 10 inside the hull 1a, and the regasification apparatus 20 and the liquefied gas supply apparatus on the hull 1a. It may have 30.

The liquefied gas storage tank 10 stores liquid liquefied gas. The liquefied gas storage tank 10 may store the liquefied gas at a pressure of about 1 bar, and the liquefied gas stored in the liquefied gas storage tank 10 may be supplied to the liquefied gas storage tank 10 by the feeding pump 21. After discharged to the outside may be vaporized by the carburetor 24 may be delivered to an external demand (not shown). Here, the demand destination may be an engine or a turbine that produces energy, or a city gas or a general household, but is not particularly limited.

The liquefied gas storage tank 10 may be provided in plurality, and may be arranged side by side inside the hull 1a. For example, at least four liquefied gas storage tanks 10 may be arranged in a predetermined direction (front and rear direction) inside the hull 1a, but the number or arrangement of the liquefied gas storage tanks 10 is not limited as described above.

Here, the gas regasification apparatus 20 accommodates the regasification units 21, 22, 23, and 24 for regasifying the gas, and is provided on the upper deck D on the side of the bow portion 1b, for example. This is only an example and may be disposed in the central portion 1c.

In addition, the liquefied gas supply device 30 processes the liquefied gas stored in the liquefied gas storage tank 10 and supplies it to the propulsion engine E provided in the stern 1d to drive the shaft S to propeller P It is a device to generate a propulsion force on the vessel (1) through. For example, the liquefied gas supply device 30 may be provided on the trunk deck T of the central portion (1c).

Hereinafter, the gas regasification apparatus 20 of the present invention will be described in detail with reference to FIGS. 2 to 4.

2 is a front view of a gas regasification device according to an embodiment of the present invention, FIG. 3 is a side view of a gas regasification device according to an embodiment of the present invention, and FIG. 4 is a gas regasification device according to an embodiment of the present invention. Side conceptual diagram.

2 to 4, the gas regasification apparatus 20 according to the embodiment of the present invention, the housing 201, the feeding pump 21 (shown in Figure 1), suction drum 22, boosting A pump 23 and a vaporizer 24.

The housing 201 may at least partially surround regasification units for regasifying the gas and may have an open top.

The housing 201 is formed with a side cross section in a '-' shape so that the protruding portion faces forward, and an opening 202 to 204 which circulates inside by natural flow without a circulation device driven by a separate power. )

The housing 201 may include an upper portion 2011 having a protruding portion protruding forward and a lower portion 2012 connecting the protruding portion and the upper deck D. In this case, a rock wall crumb device such as a winch may be provided in the empty space between the upper portion 2011 and the upper deck D.

The housing 201 is formed on the upper deck D on the side of the bow portion 1b, and more specifically, on the upper deck D in the upward direction of the Forward (FWD) Pump Room (not shown) of the bow portion 1b. Can be formed on.

In the Forward (FWD) Pump Room, a seawater pump (not shown), a seawater heat exchanger (glycol heater; not shown), and a sea chest (not shown) may be disposed as intermediate heat supply devices to be described later.

In addition, the housing 201 may be formed to mate with the trunk deck (T) at the rear.

In this case, the housing 201 may be formed to be spaced apart from the trunk deck T by a predetermined interval, and a portion facing the trunk deck T may have an open shape. Through this, the housing 201 allows the internal air circulation to be made naturally and actively.

Here, the lower part 2012 may be provided with a drip tray (not shown) for temporarily storing the leaked liquefied gas. Of course, the upper part 2011 may also be provided with a drip tray.

The housing 201 is formed to surround the boosting pump 23 and the vaporizer 24, which will be described later, and the suction drum 22, which will be described later, may not be surrounded. In this case, the suction drum 22 may be disposed on the trunk deck T at the rear of the housing 201, and a drip tray (not shown) may be separately provided below the suction drum 22.

That is, in the present invention, the height of the gas regasification apparatus 20 is lowered while the suction drum 22 is placed outside the housing 201, so that the internal air circulation of the housing 201 can be more efficiently implemented.

The openings 202 to 204 may include an upper front opening 202, a lower front opening 203, and an access opening 204.

Here, the openings 202 to 204 may have a plurality of upper front openings 202 and lower front openings 203 only on the front surface of the housing 201, and an access opening 204 may be formed on the side surface thereof.

The upper front opening 202 may be formed on the front surface of the upper portion 2011 of the housing 201, and may be formed on the outer side portion of the front surface of the upper portion 2011. The upper front openings 202 may all be formed in a circular shape.

At this time, the upper front opening portion 202 may be formed less than the lower front opening portion 203, which is because the upper portion 2011 has more inflow of foreign matter from the external environment such as waves than the lower portion (2012) Because.

The lower front opening 203 is formed at the front surface of the lower portion 2012 of the housing 201, and may be variously formed at the front surface of the lower portion 2012. The lower front opening portion 203 may be formed in a circular shape.

An access opening 204 may be formed in the upper side portion 2011b or the lower side portion 2012b to allow the inside of the housing 201 to allow the operator (not shown) to access the interior of the housing 201 while allowing the internal air flow to occur naturally. have.

Here, the access opening 204 has a form in which the upper side and the lower side are formed in a semicircle, and the upper side and the lower side are connected in a straight line.

The effect of the internal circulation flow given by the shape of the housing 201 described above will be described in detail through the data shown in FIGS. 5 and 6.

5 is a diagram illustrating a ventilation of a conventional gas regasification apparatus, and FIG. 6 is a diagram illustrating a ventilation of a gas regasification apparatus according to an embodiment of the present invention.

FIG. 5 (a) is a view showing a CH4 diffusion zone at the time of leakage of liquefied gas inside when a gas regasification apparatus is provided with a conventional housing, and (b) is a gas regasification apparatus provided with a conventional housing. In the case of liquefied gas leakage, it is a diagram showing the rate of CH4 diffusion in each zone.

 The conventional housing is formed to surround all of the regasification units so as to form separate ventilation devices in a sealed form without openings.

Therefore, since there is no air inflow from the outside as shown in FIG. 5, when the liquefied gas leaks, the natural gas (CH4) is spread downward, and thus, there is a problem that the explosion risk is not increased naturally.

In order to solve this problem, the present invention has constituted a shape of a housing 201 surrounding the gas regasification apparatus 20, and this effect is as shown in FIG. 6.

FIG. 6 is a view showing the CH4 density of each zone in the case of liquefied gas leakage when the housing 201 of the present invention is provided in the gas regasification apparatus. The closer to red, the higher the density; the closer to blue, the lower the density.

Referring to FIG. 6, when the liquefied gas leaks, after 100 seconds (T = 100s), the entire area is close to red, so that all natural gas (CH4) is spread downward. After another 100 seconds (T = 200s), the entire area is almost blue, so all the natural gas (CH4) is discharged to the outside, and the ventilation is very efficient.

As described above, the gas regasification apparatus 20 according to the present invention forms circular openings 202 and 203 on the front surface of the housing 201, installs the suction drum 22 outside the housing 201, and provides a housing ( 201) is formed to be spaced apart from the trunk deck (T) by a predetermined interval and at the same time the side facing the trunk deck (T) is opened so that the natural air through the air from the outside without building a separate ventilation device By providing ventilation, the construction cost is reduced and the energy efficiency is increased.

The feeding pump 21 discharges the liquefied gas stored in the liquefied gas storage tank 10 to the outside of the liquefied gas storage tank 10. At this time, the liquefied gas may be somewhat pressurized by the feeding pump 21. Pressurization by the feeding pump 21 may not be achieved until the required pressure of the customer. Accordingly, the boosting pump 23 to be described later pressurizes the liquefied gas by the difference between the pressure of the liquefied gas pressurized by the feeding pump 21 and the required pressure of the demand destination.

The feeding pump 21 may be configured as, for example, a centrifugal pump on the outside of the liquefied gas storage tank 10, or may be latent inside.

A liquefied gas supply line (not shown) may be provided from the feeding pump 21 to the demand destination, and three liquefied gas supply lines may be formed in parallel to form first to third trains.

The suction drum 22 may receive the liquefied gas stored in the liquefied gas storage tank 10 from the feeding pump 21 to temporarily store the liquefied gas.

Specifically, the suction drum 22 may be supplied with the liquefied gas stored in the liquefied gas storage tank 10 from the feeding pump 21, and the liquefied gas may be separated into the liquid phase and the gas phase by temporarily storing the supplied liquefied gas. The separated liquid phase may be supplied to the boosting pump 23.

That is, the suction drum 22 temporarily stores the liquefied gas to separate the liquid phase and the gaseous phase, and then supplies the complete liquid phase to the boosting pump 23 so that the boosting pump 23 has a net positive suction head (NPSH). ), Thereby preventing the cavitation (Cavitation) in the boosting pump (23).

The suction drum 22 may be formed in a pressure vessel type capable of withstanding pressure, and may endure 6 to 8 bar or 6 to 15 bar.

The boosting pump 23 may pressurize the liquefied gas supplied from the suction drum 22 to 50 to 120 bar and supply it to the vaporizer 24.

The boosting pump 23 may pressurize the liquefied gas according to the pressure required by the customer, and may be configured as a centrifugal pump.

The vaporizer 24 may be provided on the liquefied gas supply line L1 to vaporize the high pressure liquefied gas discharged from the boosting pump 23.

Specifically, the vaporizer 24 may vaporize the high pressure liquefied gas supplied from the boosting pump 23 and supply it in a desired state.

The vaporizer 24 receives an intermediate heat medium through an intermediate heat medium supply device (not shown) to heat-exchange with the liquefied gas to vaporize the liquefied gas.

The vaporizer 24 may use a mixed refrigerant or a non-explosive refrigerant in which a phase change exists as an intermediate heat medium for vaporizing the liquefied gas, and supply a high-pressure vaporized liquefied gas to a demand destination without pressure fluctuations.

Here, the vaporizer 24 may be a fruit such as aqueous glycol solution, propane, etc. as an example of the intermediate heat medium.

Taken together, the gas regasification apparatus 20 according to the present invention, without forming a separate ventilation device by forming circular openings 202 to 204 in the housing 201 for accommodating the gas regasification apparatus 20. By allowing natural ventilation through the air flowing from the outside, the construction cost is reduced, the safety is improved, and the energy efficiency is increased.

Although the present invention has been described in detail through specific embodiments, it is intended to describe the present invention in detail, and the present invention is not limited thereto, and should be understood by those skilled in the art within the technical spirit of the present invention. It is obvious that the modifications and improvements are possible.

All simple modifications or changes of the present invention belong to the scope of the present invention, the specific scope of protection of the present invention will be clear by the appended utility model registration claims.

1: Ship 1a: Hull
1b: bow 1c: center
1d: Stern 10: Liquefied Gas Storage Tank
20: gas regasification apparatus 201: housing
2011: Top 2011a: Top Front
2011b: Upper side section 2012: Lower
2012a: lower front part 2012b: lower side part
202: upper front opening 203: lower front opening
204: access opening 21: feeding pump
22: suction drum 23: boosting pump
24: carburetor 30: fuel processing device
T: Trunk deck D: Upper deck
P: Propeller E: Propulsion Engine
S: propulsion shaft

Claims (12)

A gas regasification apparatus having a housing at least partially surrounding regasification units for regasifying a gas, the apparatus comprising:
The housing is
The side cross section is formed in a '-' shape, the protruding portion is formed to face forward,
Gas regasification apparatus characterized in that it has an opening for circulating the interior by natural flow without a circulator driven by a separate power. The method of claim 1, wherein the opening,
Gas regasification apparatus, characterized in that formed on the front of the housing a plurality. The method of claim 2, wherein the housing,
An upper portion having the protruding portion; And
A lower portion connecting the protruding portion and the upper deck;
The opening is,
Gas regasification apparatus, characterized in that formed on the lower portion than the upper portion. The method of claim 3, wherein the upper portion,
Gas opening apparatus, characterized in that formed when the opening is viewed from the front side. The method of claim 4, wherein the regasification unit,
Gas regasification apparatus, characterized in that disposed in the fore part. The method of claim 5, wherein the regasification unit,
A suction drum for temporarily storing the liquefied gas stored in the liquefied gas storage tank;
A pump configured to pressurize and receive a liquefied gas from the suction drum; And
It includes a vaporizer for receiving the liquefied gas from the pump and regasification,
The housing is formed to surround the pump and the carburetor,
And the suction drum is disposed outside the housing. The method of claim 6, wherein the suction drum,
And a gas regasification device disposed behind the housing and disposed on the trunk deck. The method of claim 7, wherein the housing,
Gas regasification apparatus, characterized in that formed to be spaced apart from the trunk deck a predetermined interval. The method of claim 1, wherein the housing,
And a drip tray for temporarily storing the liquefied gas leaked in the lower portion. The method of claim 1, wherein the opening,
A front opening formed in plural on the front of the housing; And
And an access opening formed on a side of the housing to allow an operator access. The method of claim 10, wherein the access opening,
Gas regasification apparatus, characterized in that the upper side and the lower side is formed in a semicircular shape and connected in a straight line. 12. A ship comprising the gas regasification device according to claim 1.

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