KR101122552B1 - An apparatus and a method for reducing boil off gas at loading column and a ship having the same apparatus - Google Patents

Abstract

The present invention is to provide a BOG abatement apparatus for a loading column that can be installed between the cargo supply pipe and the drop line to maintain a constant pressure of the liquid cargo under loading to reduce the vaporization of the liquid cargo, that is, the generation of BOG.
BOG reduction device for a loading column according to the present invention is coupled between the cargo supply pipe 90 for loading liquid cargo in the cargo hold tank 80 and the drop line 110 installed inside the cargo hold tank, the entire flow of liquid cargo Pressure compensation channel unit 100 for converting the flow into the number, and the BOG drum 200, the pressure difference compensation BOG inside the pressure compensation channel unit is stored, and coupled between the BOG drum and the cargo supply pipe BOG The heat pipe 290 for compensating the temperature difference of the BOG stored in the drum, and the valve pipe parts (300, 300a) for opening and closing according to the pressure change in the pressure compensation channel portion to flow the BOG of the BOG drum into and out of the pressure compensation channel portion It may include.

Description

TECHNICAL APPARATUS AND AN METHOD FOR REDUCING BOIL OFF GAS AT LOADING COLUMN AND A SHIP HAVING THE SAME APPARATUS

The present invention relates to a BOG abatement apparatus and method for a loading column, and a vessel having the apparatus, and more particularly, a carrier ship, a floating structure, a floating production storage vessel or a storage vessel for storing the liquefied natural gas LENG or liquid cargo or The present invention relates to a BOG abatement apparatus and method for a loading column that can be applied to a ship building field such as a facility, and a ship having the device.

In general, natural gas is transported in gaseous form through onshore or offshore gas pipelines, or stored in cargo hold of a carrier in the form of liquefied natural gas (LGE). Can be transported to remote demand.

Such LENG is obtained by cooling natural gas to a cryogenic state of about -163 ° C, and its volume is reduced to about 1/600 than that of gaseous natural gas, which is very suitable for long distance transportation through sea.

LENG can generate BOG (Boil Off Gas) during storage, supply, loading or unloading.

BOG refers to a gas generated by vaporization when heat is introduced from the surroundings or when pressure is reduced, and may refer to all gases generated outside the vaporizer and may also be referred to as an evaporation gas.

The loading and unloading device for cargo hold of an L vessel, a floating production storage vessel or a facility according to the prior art is a horizontal pipe for loading or unloading an L engine in a storage tank 1, as shown in FIG. An unloading column (4) having a cargo hold liquid line (2) which is a member, and a pump (3) connected to one side of the cargo hold liquid line (2) to unload the L & G out of the storage tank (1), It is provided with a loading column 5 which is connected to the other side of the cargo hold liquid line 2 and is a vertical pipe member for loading the L ENG into the storage tank 1.

Here, the cargo liquid line 2 is installed horizontally above the storage tank 1, and the loading column 5 is coupled vertically downward from the cargo liquid line 2 toward the bottom of the interior of the storage tank 1. It is extended.

When the LENG is loaded into the storage tank 1, the liquid LENG flows along the cargo hold liquid line 2 while maintaining the temperature of about -160 ° C and 0 atm of the LENG vapor pressure, and the inside of the loading column 5 When it reaches the top, it is rapidly accelerated downward along the loading column 5 while being accelerated by gravity.

As a result, in the upper portion of the inside of the loading column 5, the pressure of the LENG is reduced below 0 atm, which is the LENG vapor pressure, and eventually has a disadvantage in that a large amount of BOG is generated or increased as the LENG is vaporized.

The generated or increased BOG incurs costs such as reliquefaction and adversely affects the operation of the LNG shipment management system.

For example, when BOG occurs inside a pipe such as a loading column, it may cause a problem on the system while being a two-phase flow rather than a single phase flow. In other words, as an abnormal flow is generated in the pipe and BOG is repeatedly generated and extinguished, erosion and corrosion may be increased, and noise may be generated. In addition, if the generated BOG is not properly discharged, it may act as a factor that inhibits the flow of LENG.

In addition, the BOG generated inside the pipe flows into the storage tank of the cargo hold to increase the internal pressure of the storage tank, and if a BOG above the standard occurs, a problem that must be dealt with.

Some LNG carriers use a vent master to release air, use it as an engine fuel, or install reliquefaction equipment. Therefore, not only the cost for such a facility is added, but the cost of continuous operation is also added.

An object of the present invention devised to solve this problem is installed between the cargo supply pipe and the drop line for preventing loading of the liquid cargo under load, thereby reducing the vaporization of liquid cargo, that is, for the loading column It is intended to provide a BOG abatement device.

In addition, another object of the present invention is to compensate for the pressure difference while the liquid cargo flows to the full flow (full flow), the flow of the filled state in the cargo supply pipe, and then flows into the open channel flow in the pressure compensation channel portion The present invention provides a method for reducing a load column for a loading column, which is formed as a whole flow in a drop line and can suppress generation of BOG.

In addition, another object of the present invention is to connect a heat pipe between the pressure compensation channel portion and the BOG drum with a heat pipe temperature difference that the heat flows into the liquid cargo according to the pressure difference compensation without installing a heat exchanger system requiring a separate operating cost It is an object of the present invention to provide a ship having a BOG abatement device for a loading column that can be solved in advance and that the operation of the device is very easy and efficient.

The objects of the present invention described above are combined between a cargo supply pipe for loading liquid cargo in a cargo tank, which will be described in detail below, and a drop line installed inside the cargo tank, for a full flow of liquid cargo. ) Is a pressure compensation channel unit for converting the flow into an open channel flow, and a BOG drum storing a pressure difference compensation BOG inside the pressure compensation channel unit, and coupled between the BOG drum and the cargo supply pipe. For a loading column including a heat pipe for compensating the temperature difference of the BOG stored in the BOG drum, and a valve pipe for opening and closing according to the pressure change inside the pressure compensation channel portion to flow the BOG of the BOG drum into and out of the pressure compensation channel portion It can be achieved by a BOG abatement device.

In addition, according to the present invention, the pressure compensation channel portion accumulatively inserted into the end of the cargo supply pipe is hermetically penetrated, and accumulates the enlarged space compared to the cargo supply pipe to temporarily trap the BOG, the accumulator Liquid cargo primary rotating portion formed in the shape of a reduction tube in the lower portion of the radar, a connecting portion extending downward from the lower portion of the liquid cargo primary rotational portion, and liquid cargo formed in a reducing tube shape from the lower portion of the connecting portion to the upper portion of the drop line It may include a secondary rotation.

In addition, an object of the present invention is a method of using a BOG abatement device for a loading column, the liquid cargo flows to the total flow, which is the flow of the filled state in the cargo supply pipe, and then flows to the flow in the pressure compensation channel portion to the flow of the BOG The pressure difference is compensated for by the BOG flow between the drum and the pressure compensation channel portion, and can be achieved by the BOG reduction method for the loading column, which is formed as a whole flow in the drop line to suppress the generation of BOG.

The present invention may also be a vessel having a BOG abatement device for a loading column.

BOG reduction device for a loading column of the present invention has the advantage that can prevent the generation of BOG during the shipment of liquid cargo, such as LENG, by compensating the pressure difference in the pressure compensation channel portion.

In addition, the BOG abatement device for the loading column of the present invention by cooling the BOG of the upper portion of the cargo tank tank naturally generated by the temperature difference between the upper portion of the cargo tank and the lower of the cargo tank tank with the BOG drum and heat pipe and then introduced into the accumulator, There is an advantage that can be operated efficiently without using a heat exchanger system that requires a high cost or a separate operating cost.

In addition, the BOG reduction device for a loading column of the present invention has the advantage that it is easy to apply to a pre-made vessel or equipment. This does not change the entire loading column, but by combining the pressure compensation channel portion on the upper part of the pre-installed drop line to perform the role of the loading column, there is an effect that can effectively reduce and suppress the BOG.

In addition, the BOG abatement apparatus for the loading column of the present invention can be applied to the production of the loading column of the carrier ship carrying liquid cargo, such as crude oil, as well as LENG, the same as the principle that the BOG is not vaporized, liquid such as crude oil Compensating the pressure difference for VOC (Volatile Organic Compound), which is a volatile organic compound, inside the pressure compensating channel part during loading of cargo, it can be used to reduce the generation of VOC by preventing heat from entering the liquid cargo. There is an advantage.

In addition, the BOG reduction method for a loading column according to the present invention uses only a BOG drum and a heat pipe, thereby cooling only the BOG of the cargo hold tank to be used for pressure difference compensation, thereby allowing heat inflow that may occur during BOG pressure compensation in the pressure compensation channel part. There is an advantage that can block the problem in advance.

In addition, the BOG reduction method for the loading column of the present invention by reducing the generation of BOG by inducing the entire flow in the cargo supply pipe, open channel flow in the pressure compensation channel portion, the total flow in the drop line by the device configuration It has the advantage of being able to ship liquid cargo in cargo tanks quickly.

The vessel having the BOG abatement device for the loading column of the present invention can be easily applied to the existing loading column without additional costs such as replacing the entire loading column, it is possible to suppress the generation of BOG when loading the liquid cargo There is this.

1 is a front view of the cargo hold unloading device according to the prior art.
2 is a front view of a BOG abatement apparatus for a loading column according to a first embodiment of the present invention.
3 is a plan view of the BOG abatement apparatus for the loading column shown in FIG.
4 and 5 are partially enlarged views for explaining a method of operating the BOG reduction device for a loading column shown in FIG.
6 is a partially enlarged view of a BOG reduction apparatus for a loading column according to a second embodiment of the present invention.
FIG. 7 is a partially enlarged view for explaining a method of operating a BOG abatement device for a loading column illustrated in FIG. 6.

Hereinafter, with reference to the accompanying Figures 2 to 7 will be described in detail with respect to the BOG reduction apparatus and method for a loading column and a vessel having the device according to embodiments of the present invention.

The following specific examples are merely illustrative of the BOG abatement apparatus and method for a loading column according to the present invention and a vessel having the apparatus, and are not intended to limit the scope of the present invention.

First embodiment

As shown in Figures 2 and 3, the BOG reduction device for a loading column according to the present invention is the pressure compensation channel unit 100, BOG drum 200, heat pipe 290, valve piping 300 ) May be provided.

The apparatus of the present invention can be referred to as a kind of BOG reduced loading column by being coupled to the top of the drop line 110 which is the bottom of the loading column.

The discharge part 111 may be formed under the drop line 110.

The cargo supply pipe 90 may be used to load a liquid cargo, such as LENG, into the cargo hold tank 80, and may refer to, for example, an LNG loading line, which is a horizontal pipe member.

The full flow may refer to a flow flowing in the cargo supply pipe 90 or the drop line 110 in a full state.

The open channel flow may refer to a flow flowing freely in a conduit relatively wider than the cargo supply pipe 90.

The pressure compensation channel unit 100 is coupled between the cargo supply pipe 90 installed outside the cargo tank 80 and the drop line 110 installed inside the cargo tank 80 to flow the entire flow of liquid cargo in numbers. The inner space is enlarged as compared to the cargo supply pipe 90 or the drop line 110 so as to be converted into.

Referring to FIG. 3, the pressure compensation channel unit 100 has an accumulator 101 having an inner curved surface such as a semi-cylindrical shape or a hemispherical shape in which one end is blocked and the other end is opened.

Due to the shape characteristic of the accumulator 101, the channel flow may proceed while rotating along the inner surface of the accumulator 101.

The end portion 91 of the cargo supply pipe 90 is inserted through the wall portion of the accumulator 101 in an airtight manner, and then is eccentric from the center of the accumulator 101 to be internally curved of the accumulator 101. Can be located nearby.

The end portion 91 of the cargo supply pipe 90 positioned as described above is curved to correspond to the inner curved surface of the accumulator 101, and the liquid cargo to be discharged therein is along the inner curved surface of the accumulator 101. It can rotate smoothly.

Accumulator 101 corresponds to the upper structure of the pressure compensation channel unit 100, has an enlarged space compared to the cargo supply pipe 90 or drop line 110, and temporarily locks the BOG, It may serve to guide the liquid cargo to rotate along the inner curved surface of the accumulator 101.

The pressure compensation channel part 100 is the liquid cargo primary rotation part 102 and the connecting part 103 so that the liquid cargo of the flow in the flow in the accumulator 101 suddenly changes from the drop line 110 to the total flow. ), The liquid cargo secondary rotation part 104 may be provided.

The liquid cargo primary rotation unit 102 is formed at the lower portion of the accumulator 101 and may be a structure that gradually decreases in diameter downward, such as a hopper shape or a reduction tube shape. The liquid cargo primary rotation part 102 forms a vortex having a hollow hole in the center while gradually reducing and rotating the rotation radius of the liquid cargo descending while rotating to a large radius in the accumulator 101. Can play a role.

The connection part 103 may extend downward from the lower portion of the liquid cargo primary rotation part 102 to have a pipe shape. The connecting portion 103 may play a role of inducing a gradual acceleration by preventing the liquid cargo flowing in the vortex from being suddenly converted into a vertical flow.

The liquid cargo secondary rotation part 104 may be a hopper shape or a reduction tube shape structure connected between the lower part of the connecting part 103 and the upper part of the drop line 110.

The liquid cargo secondary rotation part 104 gradually reduces and stabilizes the rotation radius of the liquid cargo gradually accelerated and lowered in the connecting part 103 to induce the entire flow in the drop line 110 to naturally occur. Can play a role.

The BOG drum 200 serves to store the pressure difference compensation BOG in the pressure compensation channel unit 100, and cools the BOG flowing into the BOG drum 200 with the help of the heat pipe 290. It compensates for the temperature difference of BOG.

BOG drum 200 is the BOG that can be generated in the pressure compensation channel unit 100 or the BOG that can be generated in the inner upper portion of the cargo hold tank 80 is collected. In the case of the LNG carrier, there may be a temperature difference between the cargo supply pipe 90, which is the LNG loading line, and the BOG on the inner upper portion of the cargo hold tank 80. For example, the BOG of the inner upper portion of the cargo hold tank 80 is about -130 ° C may have a temperature difference of 20 ~ 30 ° C compared to the cargo supply pipe (90). Therefore, cooling may be required before supplying or flowing the BOG of the inner upper portion of the cargo hold tank 80 to the pressure compensation channel unit 100 to compensate for the pressure difference.

The heat pipe 290 may be coupled between the BOG drum 200 and the cargo supply pipe 90 to serve to compensate for the temperature difference of the BOG.

The plurality of heat pipes 290 may be coupled in a state where the heat pipe 290 is hermetically penetrated through the wall portion of the accumulator 101 of the pressure compensation channel unit 100. In this case, one end of each of the heat pipes 290 may be connected to the BOG drum 200, and the other end of each of the heat pipes 290 may be connected to the cargo supply pipe 90.

The heat pipe 290 may be a heat exchange means for transferring the cold heat of the cargo supply pipe 90 to the BOG drum 200 via the pressure compensation channel unit 100 by using the tropical flow of the working fluid filled therein. have.

The valve pipe part 300 may be opened and closed according to the pressure change in the pressure compensation channel part 100 so that the BOG of the cargo hold tank 80 may flow to the BOG drum 200 or the pressure compensation channel part 100. have.

For example, the valve pipe part 300 includes a BOG suction line 330 provided with a BOG suction valve 310, a BOG outlet line 332 provided with an English T-shaped joint pipe 331, and a BOG release valve 320. The installed BOG release line 333 may be included.

Here, one end of the BOG suction line 330 may be piped to one side of the pressure compensation channel unit 100, the other end may be piped to one side of the BOG drum (200).

In addition, one end of the BOG outflow line 332 may be piped to the cargo hold tank 80, the other end may be piped to the other side of the BOG drum (200).

In addition, one end of the BOG release line 333 may be piped to the other side of the pressure compensation channel unit 100, the other end may be piped to the fitting pipe 331 of the BOG flow-out line 332.

In addition, the BOG suction valve 310 may be set such that the pressure inside the pressure compensation channel unit 100 is opened when the pressure is lowered than the pressure set in the BOG suction valve 310 and closed when the pressure is increased.

On the contrary, the BOG release valve 320 may be set to open when the pressure inside the pressure compensation channel unit 100 rises or falls when the pressure is set higher than the pressure set in the BOG release valve 320 in advance.

Hereinafter, the BOG reduction method for the loading column of the present invention will be described.

As shown in FIG. 4, gas generated from BOG or liquid cargo (eg, VOC, etc.) may be input in a shipping facility or a connecting pipe, heat in a cargo supply pipe 90, or a temperature increase due to rotation of a pump. Heat may be introduced from the environment, or may be generated by vaporization when the pressure is lowered.

That is, the liquid cargo flowing in the entire flow in the cargo supply pipe 90 flows into the pressure compensation channel unit 100 and then flows into the flow in the accumulator 101 of the pressure compensation channel unit 100. do.

Some of these liquid products may be slightly vaporized to generate BOG.

This BOG is trapped in the upper space of the accumulator 101 of the pressure compensation channel portion 100.

If the pressure is lowered in the accumulator 101, the BOG suction valve 310 may be opened and the BOG release valve 320 may be closed.

The BOG drum 200 may store the BOG introduced from the cargo hold tank 80. As the BOG drum 200 is cooled by the heat pipe 290, the BOG drum 200 may also cool the BOG stored in the BOG drum 200.

The BOG cooled in the BOG drum 200 is sucked into the accumulator 101 of the pressure compensation channel part 100 through the BOG suction valve 310 and the BOG suction line 330.

The introduced BOG compensates for the pressure drop of the liquid cargo which may occur when flowing from the cargo supply pipe 90 to the pressure compensating channel part 100, thereby preventing vaporization of a portion of the liquid cargo, thereby ultimately preventing BOG generation of the liquid cargo. Can be reduced or suppressed.

As shown in FIG. 5, if the amount of generation of BOG is increased to increase the internal pressure of the accumulator 101 of the pressure compensation channel unit 100, the BOG suction valve 310 is closed and, conversely, the BOG release. The valve 320 may be open.

Accordingly, the BOG of the accumulator 101 of the pressure compensation channel portion 100 passes through the BOG release valve 320, the BOG release line 333, the joint pipe 331, and the BOG outflow line 332. It may flow toward the 200 or the cargo hold tank (80).

As such, the BOG flows into and out of the pressure compensation channel part 100 according to the change in the internal pressure of the pressure compensation channel part 100, and as a result, the internal pressure of the pressure compensation channel part 100 is kept constant at a preset pressure. Thus, at least the BOG is not generated in the discharge part 111 of the drop line 110.

On the other hand, in the case of the BOG drum 200 can be maintained at the same temperature as the cargo supply pipe 90 by the heat pipe 290, there is no need to use other additional heat exchange equipment or system.

In addition, the unvaporized liquid cargo flowing into the accumulator 101 gradually decreases the rotation radius of the vortex through the liquid cargo primary rotating part 102 and the connecting part 103 and the liquid cargo secondary rotating part 104. May flow towards the drop line 110.

At this time, since the hollow hole formed at the center of rotation of the vortex plays a role as a kind of vent hole, it may play a role of discharging the very small BOG in the liquid cargo toward the accumulator 101.

The liquid cargo, which has passed through the liquid cargo secondary rotary part 104 and reaches the upper inlet point of the drop line 110, is converted from the channel flow back to the total flow.

As a result, the BOG that may occur before the drop line 110 may not flow into the drop line 110 or the cargo hold tank 80.

The liquid cargo flowing into the drop line 110 falls down, but the potential energy of the liquid cargo is gradually converted into pressure energy.

Accordingly, in the discharge part 111, the pressure may be increased by a head corresponding to the length h of the drop line 110. Therefore, BOG may not occur in the drop line 110 and the discharge part 111.

On the other hand, the BOG reduction device for a loading column of the present invention can be easily applied to a pre-made vessel, such as LENG carrier. Here, instead of removing the existing loading column, the BOG reduction apparatus for the loading column of the present invention may be attached to the upper portion of the existing loading column to change the existing loading column to the BOG reduction method.

As such, some modifications may also be easily installed and applied to an existing ship, with little change in the design of the cargo hold tank, which is difficult to change.

Second embodiment

The BOG abatement device and method for the loading column of the present invention described in this embodiment, and the vessel having the device, except that one breather valve is used instead of two valves when constructing the valve piping. Same as the first embodiment. Therefore, the same or similar reference numerals will be given to the same or corresponding components in FIGS. 2 to 7, and the description thereof will be omitted here.

As shown in FIG. 6, the valve piping part 300a according to the second embodiment sucks BOG of the BOG drum 200 to maintain pressure balance in the pressure compensation channel part 100, thereby providing a pressure compensation channel part. (100) has a breather valve 340 for introducing into or discharge the BOG inside the pressure compensation channel unit 100 toward the BOG drum (200).

This breather valve 340 has a first chamber 341 and a second chamber 342. First and second stems 343 and 344 are respectively coupled to the first chamber 341 and the second chamber 342.

A first port 345 is formed at the side of the first chamber 341 to couple the BOG discharge line 334 through.

A second bottom portion of the second chamber 342 located vertically downward of the first stem 343 may be configured to penetrate the suction line 330b extending from the accumulator 101 of the pressure compensation channel portion 100. Two ports 346 are formed.

A third port for connecting the BOG suction line 330a piped to the BOG discharge line 334 through a joint pipe is provided at the bottom right of the second chamber 342 located vertically downward of the second stem 344. 347 is formed.

When the internal pressure of the accumulator 101 of the pressure compensating channel part 100 decreases, the breather valve 340 is a breather valve due to the pressure difference between the BOG drum 200 and the accumulator 101. Instead of the first stem 343 of the first chamber 341 of 340 descending, the second stem 344 of the second chamber 342 rises.

In this case, the BOG cooled and stored in the BOG drum 200 passes through the second chamber 342 and the suction line 330b of the BOG suction line 330a and the breather valve 340 and the pressure compensation channel part 100. May be sucked into the cumulator 101.

Accordingly, the pressure of the liquid cargo can be maintained in the accumulator 101 so that BOG generation can be reduced.

As shown in FIG. 7, the breather valve 340 of the BOG drum 200 and the accumulator 101 when the internal pressure of the accumulator 101 of the pressure compensation channel unit 100 rises. Due to the pressure difference, the second stem 344 of the second chamber 342 is lowered instead of the first stem 343 of the first chamber 341 of the breather valve 340.

In this case, the BOG in the accumulator 101 may flow toward the BOG drum 200 via the first chamber 341 and the BOG discharge line 334 of the suction and discharge line 330b and the breather valve 340. .

As the pressure of the liquid cargo is maintained in the accumulator 101, the generation of BOG can be reduced.

Such a technical configuration of the present invention will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the scope of the present invention is represented by the following claims rather than the foregoing description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention. Should be interpreted.

100: pressure compensation channel portion 101: accumulator
102: liquid cargo primary rotation part 103: connection portion
104: liquid cargo secondary rotation portion 110: drop line
200: BOG drum 290: heat pipe
300, 300a: Valve piping 310: BOG suction valve
320: BOG release valve 340: breather valve

Claims (9)

It is coupled between a cargo supply pipe for loading liquid cargo into a cargo tank and a drop line installed inside the cargo tank to convert the full flow of liquid cargo into open channel flow. Pressure compensation channel section,
BOG drum for storing the pressure difference compensation BOG in the pressure compensation channel portion;
A heat pipe coupled between the BOG drum and the cargo supply pipe to compensate for a temperature difference of the BOG stored in the BOG drum;
And a valve pipe opening and closing according to a pressure change inside the pressure compensation channel part to flow the BOG of the BOG drum into and out of the pressure compensation channel part.
BOG abatement device for loading columns.
The method of claim 1,
The pressure compensation channel portion
An accumulator in which an end portion of the cargo supply pipe is hermetically penetrated and has an enlarged space compared to the cargo supply pipe so as to temporarily trap the BOG;
A liquid cargo primary rotation part formed in the shape of a reduction tube under the accumulator;
A connection part extending downward from the lower portion of the liquid cargo primary rotation part;
It includes a liquid cargo secondary rotary portion formed in the shape of a reduction tube from the lower portion of the connecting portion to the upper portion of the drop line
BOG abatement device for loading columns.
The method of claim 2,
The accumulator is
Forming a semi-cylindrical or hemispherical shaped inner surface such that the flow of the liquid cargo rotates along the inner curved surface.
BOG abatement device for loading columns.
The method according to claim 2 or 3,
The end of the cargo supply pipe
Curved corresponding to the inner curved surface of the accumulator
BOG abatement device for loading columns.
The method of claim 1,
The heat pipe
A plurality of airtightly penetrates through the wall of the accumulator of the pressure compensation channel portion, one end of each of the heat pipe is connected to the BOG drum, the other end of each of the heat pipe is connected to the cargo supply pipe
BOG abatement device for loading columns.
The method of claim 1,
The valve piping portion
A BOG suction line coupled between the pressure compensation channel portion and the BOG drum and provided with a BOG suction valve, a BOG outlet line coupled between the cargo tank and the BOG drum and provided with a T-shaped joint pipe, and the pressure compensation channel portion And a BOG release line coupled between the pipe and the BOG release valve installed therein.
BOG abatement device for loading columns.
The method of claim 1,
The valve piping portion
In order to maintain the pressure balance inside the pressure compensation channel part, a breather valve which sucks BOG of the BOG drum into the pressure compensation channel part or discharges the BOG inside the pressure compensation channel part toward the BOG drum. With
BOG abatement device for loading columns.
In the method using the BOG reduction apparatus for a loading column of claim 1,
After the liquid cargo flows from the pressure supply channel to the total flow, which is the flow in the cargo supply pipe, the pressure difference is compensated by the BOG flow between the BOG drum and the pressure compensation channel portion. Formed as a full flow in the drop line to suppress the generation of BOG
BOG abatement method for loading columns.
Ship having a BOG abatement device for a loading column of claim 1.

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