KR20160003837U - Combined IGG/GCU and Boil-Off Gas Treatment System Comprising Combined IGG/GCU - Google Patents

Combined IGG/GCU and Boil-Off Gas Treatment System Comprising Combined IGG/GCU Download PDF

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Publication number
KR20160003837U
KR20160003837U KR2020150002751U KR20150002751U KR20160003837U KR 20160003837 U KR20160003837 U KR 20160003837U KR 2020150002751 U KR2020150002751 U KR 2020150002751U KR 20150002751 U KR20150002751 U KR 20150002751U KR 20160003837 U KR20160003837 U KR 20160003837U
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KR
South Korea
Prior art keywords
gas
combustion chamber
gcu
combustion
storage tank
Prior art date
Application number
KR2020150002751U
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Korean (ko)
Inventor
배현
Original Assignee
대우조선해양 주식회사
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Application filed by 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Priority to KR2020150002751U priority Critical patent/KR20160003837U/en
Publication of KR20160003837U publication Critical patent/KR20160003837U/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J99/00—Subject matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels

Abstract

According to the present invention, by using the integrated IGG / GCU and the evaporative gas treatment system, the evaporation gas (BOG) is supplied to the lower portion of the combustion chamber, The flame of the evaporation gas can be generated at the center of the combustion chamber without the blower to prevent the combustion chamber from being damaged.
In addition, since the combustion can be performed even when a vaporized gas such as free flow is supplied, the gas operating pressure range of the integrated IGG / GCU can be increased. Therefore, the integrated IGG / GCU can be continuously operated without the occurrence of the operation failure according to the pressure and concentration of the evaporating gas, so that the stability and safety as the pressure regulating device of the storage tank can be secured.
An integrated IGG / GCU and an evaporative gas treatment system according to the present invention is an integrated IGG / GCU for treating an evaporative gas in a fuel storage tank storing a liquefied gas, the integrated IGG / GCU comprising: a combustion chamber in which the evaporative gas is combusted; And a BOG injection nozzle for supplying an evaporative gas to the combustion chamber, wherein the BOG injection nozzle is installed below the combustion chamber.

Description

Integrated IGG / GCU and Evaporative Gas Treatment System Combined IGG / GCU and Boil-Off Gas Treatment System Comprising Combined IGG /

The present invention relates to an integrated IGG / GCU and an evaporative gas treatment system having an expanded gas operating pressure range and an integrated IGG / GCU and an evaporative gas treatment system.

Recently, liquefied gas such as Liquefied Natural Gas (LNG) has been increasingly consumed worldwide as an eco-friendly fuel with little emission of air pollutants during combustion. Generally, the liquefied gas is liquefied at the cryogenic temperature from the production site and then transported to the destination by the transport line. The liquefied gas obtained by liquefying the gas at a very low temperature has a merit that the volume becomes very small as compared with when it is in the gaseous state, have.

In particular, liquefied natural gas (LNG) is liquefied at a cryogenic temperature of -162 ° C at normal pressure, so that LNG is liable to evaporate even if its temperature is slightly higher than the normal pressure of -163 ° C. Therefore, although the LNG storage tank is adiabatically treated, the external heat is continuously transmitted. During the transportation, the LNG stored in the LNG storage tank is constantly natural vaporized and the boil-off gas &Quot; BOG "). This also applies to other liquefied gases such as Liquefied Petroleum Gas (hereinafter referred to as "LPG") and Liquefied Ethane Gas (hereinafter referred to as "LEG").

When the evaporation gas (BOG) is accumulated in the liquefied gas storage tank, the pressure in the storage tank is excessively increased, resulting in a safety problem as well as a cost loss due to the generation of evaporative gas. Therefore, various methods Has been studied. Conventionally, when the evaporation gas generated from the LNG storage tank is supplied to the engine and used as fuel, when the amount exceeded by the engine or exceeds the safe pressure range of the storage tank, the evaporation gas is supplied to the liquefied gas storage tank (Inert Gas Generator) that produces an inert gas (Purging Inert Gas) to be supplied to a storage tank to prevent explosion due to flammable gas present in the storage tank, ) Of the exhaust gas is consumed by combustion. In addition, an integrated IGG / GCU (Combined IGG / GCU) has been disclosed which can perform all of these processes in one device to solve problems such as a complicated system by processing IGG and GCU in a binary manner.

In the conventional integrated IGG / GCU, the position of the gas nozzle for supplying the evaporation gas is located on the upper side of the combustion chamber included in the main body of the integrated IGG / GCU, and the combustion is performed in the central portion of the combustion space, The minimum pressure of the supplied evaporating gas is determined. That is, it is necessary to pressurize the evaporation gas supplied to the combustion chamber through the compressor (compressor) and the gas blower to 1.1 bar or more. If the pressure of the supplied evaporative gas is less than or equal to 1.1 bar, incomplete combustion may occur, causing environmental problems or ignition problems, or switching to an oil fuel (Heavy Fuel Oil, hereinafter referred to as "HFO" Such as a system trip phenomenon such as an overheating phenomenon or the like, and an emergency stop (Shut Down), and the operation range of the apparatus for regulating the pressure of the storage tank is limited.

Korean Patent Laid-Open No. 10-2014-0052815 (Apr. Korean Patent Publication No. 10-2014-0052292 (Oct. 24, 2012)

Therefore, the present invention is intended to solve the above-mentioned problem, and it is possible to prevent the trip phenomenon by enabling the operation of the integrated IGG / GCU in any evaporation gas operating pressure range, and to provide an integrated IGG / GCU GCU and the evaporative gas treatment system which can ensure the safety and stability by facilitating the pressure control due to the evaporation gas of the liquefied gas storage tank.

According to an aspect of the present invention, there is provided an integrated IGG / GCU for processing an evaporative gas in a fuel storage tank storing a liquefied gas, comprising: a combustion chamber in which the evaporation gas is combusted; And a BOG injection nozzle for supplying an evaporative gas to the combustion chamber, wherein the BOG injection nozzle is installed below the combustion chamber.

Preferably, the combustion of the evaporation gas supplied by the BOG injection nozzle may cause a flame at a center of the combustion chamber.

The burner may further comprise a burner for burning the evaporation gas supplied to the combustion chamber, and a combustion gas outlet for discharging the combustion gas burned in the combustion chamber, wherein the combustion gas outlet is provided at an upper portion of the combustion chamber have.

Preferably, an air blower for supplying air to the combustion chamber may be further included.

Preferably, the apparatus further comprises a scrubbing portion provided around the combustion chamber for scrubbing the combustion gas, wherein the scrubbing portion can be connected to an upper portion of the combustion chamber.

Preferably, the combustion gas generated in the combustion chamber is supplied to the scrubbing unit, and the combustion gas scrubbed in the scrubbing unit may be discharged to the outside.

Preferably, the combustion gas discharged to the outside may be filled in the fuel storage tank as an inert gas.

Preferably, the burner is a dual fuel burner, and may further include an oil pump for supplying oil to the combustion chamber as fuel of the burner.

According to another aspect of the present invention, there is provided an evaporative gas treatment system comprising: a fuel storage tank for storing liquefied gas; And an integrated IGG / GCU for processing the evaporative gas generated in the fuel storage tank, wherein the integrated IGG / GCU comprises a combustion chamber in which combustion of the evaporative gas occurs; And a BOG injection nozzle for supplying the evaporation gas to a lower portion of the combustion chamber, and a flame is generated at a center of the combustion chamber by a BOG injection nozzle provided at a lower portion of the combustion chamber. / RTI >

Preferably, the BOG compressor compresses the evaporative gas generated in the fuel storage tank; And a dual fuel engine (DF Engine) that receives the compressed evaporated gas as fuel.

According to another aspect of the present invention, there is provided an evaporative gas treatment system comprising: a fuel storage tank for storing liquefied gas; And an integrated IGG / GCU according to one aspect of the present invention.

According to the present invention, by using the property that the evaporation gas (BOG) is supplied to the lower portion of the combustion chamber, the evaporation gas is lighter than the air and rises upward from the inside of the combustion chamber, Center) to prevent damage to the combustion chamber.

In addition, since the combustion can be performed even when a vapor gas of a slight pressure such as Free Flow is supplied, it is possible to expand the gas operating pressure range of the integrated IGG / GCU. Therefore, the integrated IGG / GCU can be continuously operated without the occurrence of the operation failure according to the pressure and concentration of the evaporating gas, so that the stability and safety as the pressure regulating device of the storage tank can be secured.

1 is a configuration diagram of a vaporized gas processing system according to an embodiment of the present invention.
2 is a block diagram of an integrated IGG / GCU according to an embodiment of the present invention.

In order to fully appreciate the operational advantages of the present invention and the objects attained by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. The same reference numerals in the drawings denote like elements throughout the drawings. In addition, the following examples can be modified in various other forms, and the scope of the present invention is not limited to the following examples.

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

1, the evaporative gas processing system according to one embodiment of the present invention includes a fuel storage tank 10 for storing a liquefied gas, and a boil gas (Boil And an integrated IGG / GCU 40 for supplying and treating the off-gas, BOG, and the like.

The integrated IGG / GCU 40 is a device that can perform all the roles of an IGG (Inert Gas Generator), a GCU (Gas Combustion Unit) and a scrubber in one device. As shown in FIG. 2, A combustion chamber 46 for burning the evaporation gas and a scrubbing unit 47 for scrubbing the combustion gas burned in the combustion chamber 46 will be described in detail below.

In the fuel storage tank 10 storing liquefied gas such as LNG (Liquefied Natural Gas), LPG (Liquefied Petroleum Gas), LEG (Liquefied Ethane Gas) and the like, Vaporized gas (BOG) is generated. As shown in FIG. 1, the continuously generated evaporated gas is compressed by the BOG compressor 20 and supplied to the dual fuel engine (DF Engine) 70). ≪ / RTI > The compressed evaporative gas supplied to the engine 70 and remaining in excess of the amount of fuel required in the engine 70 as described above is supplied to the integrated IGG / GCU 40 to be processed or compressed before being compressed by the compressor 20 And can be vented from the fuel storage tank 10.

The evaporated gas transferred to the integrated IGG / GCU 40 is supplied to the combustion chamber 46 of the integrated IGG / GCU 40 for processing as shown in FIG. 2 where the evaporated gas flows into the combustion chamber 46, Is supplied from the lower portion of the combustion chamber 46 by the BOG injection nozzle 41 provided at the lower portion of the combustion chamber 46. [ The combustion chamber 46 has a property of burning at the center of the combustion chamber 46 due to safety problems such as damage due to the material of the combustion chamber 46 Flame should be generated for this purpose. Accordingly, even when the evaporation gas is supplied from the lower portion of the combustion chamber 46, the evaporation gas rises naturally even at a low pressure such as Free Flow which does not reach the pressure for supplying the evaporation gas to the center portion of the combustion chamber 46, A flame for combustion can be generated at the central portion of the combustion chamber 46.

A flame is a state in which fuel and air are burning in space. In the case of gas, when air is mixed and burned, a laminar flame is generated in which the properties of flame, that is, heat, light, composition and the like of flame change in order from bottom to bottom. When the flow of fuel becomes turbulent, Sparks can be produced at about 60 times the diameter. Therefore, if the generation of the flame does not occur at the center of the combustion chamber 46, the wall surface of the combustion chamber may be damaged, so that it is necessary to adjust the supply pressure of the evaporation gas.

Therefore, according to the present invention, the combustion of the evaporated gas and the generation of flame can be performed at the center of the combustion chamber 46 without further pressurization through the gas blower.

The combustion chamber 46 provides a space for burning the air supplied with the evaporation gas by the burner 42 and the width of the combustion chamber 46 from the lower portion of the combustion chamber 46 to which the evaporation gas and air are supplied, So that the center portion of each of the first and second openings can have the largest width and can be opened upward.

A burner 42 for burning the evaporation gas is installed in the lower portion of the combustion chamber 46 and can be ignited by the ignition plug 43. The burner 42 may be a dual fuel burner and may supply and burn the oil and the evaporative gas as fuel required for combustion. Therefore, an oil pump 50 for supplying oil to the combustion chamber 46 may be further provided. The oil pump 50 can additionally constitute a line for supplying ignition oil (Pilot Oil) in order to help ignition in the combustion chamber 46 as well as oil as fuel and to enable continuous combustion of the evaporation gas have.

An air supply unit (not shown) may be further provided at one side of the BOG injection nozzle 41 installed in the lower portion of the combustion chamber 46 to supply air for combustion of the evaporative gas to the combustion chamber 46. 60 to supply air to the air supply unit (not shown) by blowing air to supply oxygen to the combustion chamber 46 so that combustion can occur. The supply of air may be provided so as to be mixed and supplied together with the evaporation gas in one nozzle.

The combustion gas generated by the combustion of the evaporation gas in the combustion chamber 46 flows into the upper portion of the combustion chamber 46 through the portion communicating with the scrubbing portion 47, And is discharged to the outside through a gas outlet (not shown) provided in the scrubbing part 47 by being scrubbed by the scrubbing part 47.

The discharged combustion gas may be discharged to a gas outlet and then supplied to a cooling process and a purification process unit where it is cooled and refined so that the fuel storage tank 10 is purged for operations such as maintenance, It can be charged with gas (inert gas). According to the present invention, since continuous combustion of the evaporative gas is possible regardless of the pressure or concentration of the evaporative gas, it is possible to produce the inert gas only by burning the evaporative gas, which is the clean fuel, without burning the oil fuel.

The scrubbing part 47 may be provided annularly around the combustion chamber 46 and communicate with the upper part of the combustion chamber 46. A plurality of seawater injection nozzles 44 may be provided along the scrubbing portion 47 to spray the seawater to the scrubbing portion 47 for scrubbing the combustion gas. Further, a seawater supply line (not shown) may further be provided to supply seawater to a cooling jacket (not shown) provided outside the combustion chamber 46 for cooling the combustion chamber 46.

A filter 45 for filtering the combustion gas may be installed on the upper and lower portions of the scrubbing portion 47, respectively.

The seawater injected by the seawater injection nozzle 44 serves to dissolve or contain the water-soluble gas or combustion residue contained in the combustion gas in the scrubbing section 47, and the residue is filtered by the filter 45 . The scrubbed seawater can be discharged to the outside through a seawater discharge port (not shown) provided under the scrubbing section 47.

The operation of the evaporative gas treatment system according to the present invention is as follows.

The evaporated gas generated in the fuel storage tank 10, that is, the evaporated gas is transferred to the BOG compressor 20 to be compressed, the compressed evaporated gas is supplied as fuel to the dual fuel engine 70, Is supplied to the combustion chamber 46 of the integrated IGG / GCU 40. The evaporation gas is supplied by the BOG injection nozzle 41 provided at the lower portion of the combustion chamber 46, It is possible to generate a flame at the center. The evaporation gas is blown by the burner 42 provided at the lower portion of the combustion chamber 46 together with the air supplied to the air supply portion (not shown) of the combustion chamber 46 by the air blower 60 at the central portion of the combustion chamber 46 Flames are generated and burned. The combustion gas is discharged to the combustion gas outlet 48 provided in the upper portion of the combustion chamber 46, is supplied to the scrubbing portion 47, is scrubbed and discharged to the gas outlet.

The integrated IGG / GCU 40 may perform combustion to consume the evaporative gas and may burn the evaporative gas to be supplied to the fuel storage tank 10 as an inert gas.

As described above, the BOG injection nozzle 41 for supplying the evaporation gas to the combustion chamber 46 of the integrated IGG / GCU 40 is provided below the combustion chamber 46 and the evaporation gas is supplied to the lower portion of the combustion chamber 46 GCU 40 can be safely burnt in the central portion of the combustion chamber 46 under the unipolar condition by utilizing the property that the evaporation gas that is lighter than air rises upwardly so that the pressure of the fuel storage tank 10 The operating pressure range as the adjusting means can be made, for example, 1.1 bar or less, so that the increased operating pressure range ensures safety and stability.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. . Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

10: Fuel storage tank (Cargo Tank)
20: BOG Compressor
40: Integrated IGG / Combined Inert Gas Generator / Gas Combustion Unit (GCU)
50: Oil Pump
60: Air Blower
70: Dual Fuel Engine
41: BOG injection nozzle (Nozzle)
42: Burner
43: Initial spark plug and oil feed nozzle
44: Seawater injection nozzle
45: Filter
46: Ignition & Combustion Room
47: Scrubbing Room
48: Combustion gas outlet

Claims (11)

An integrated IGG / GCU for treating evaporative gas in a fuel storage tank for storing liquefied gas,
A combustion chamber in which the evaporation gas is combusted;
And a BOG injection nozzle for supplying an evaporative gas to the combustion chamber,
Wherein the BOG injection nozzle is installed below the combustion chamber. The method according to claim 1,
The combustion of the evaporation gas supplied by the BOG injection nozzle causes flame at the center of the combustion chamber. The method according to claim 1,
A burner for burning the evaporation gas supplied to the combustion chamber;
And a combustion gas outlet for discharging the combustion gas burned in the combustion chamber,
And the combustion gas outlet is provided at an upper portion of the combustion chamber. The method of claim 3,
And an air blower for supplying air to the combustion chamber. The method of claim 3,
Further comprising a scrubbing portion provided around the combustion chamber for scrubbing the combustion gas,
Wherein the scrubbing section is connected to the top of the combustion chamber through an integrated IGG / GCU. The method of claim 5,
The combustion gas generated in the combustion chamber is supplied to the scrubbing portion,
And the combustion gas scrubbed in the scrubbing unit is discharged to the outside. The method of claim 6,
And the combustion gas discharged to the outside is charged into the fuel storage tank as an inert gas (IGG / GCU). The method of claim 3,
Wherein the burner is a dual fuel burner,
And an oil pump for supplying oil to the combustion chamber as fuel of the burner. In an evaporative gas treatment system,
A fuel storage tank for storing liquefied gas; And
And an integrated IGG / GCU for processing the evaporative gas generated in the fuel storage tank,
The integrated IGG / GCU includes a combustion chamber in which combustion of the evaporative gas occurs; And
And a BOG injection nozzle for supplying the evaporation gas to a lower portion of the combustion chamber,
And a flame is generated at a center of the combustion chamber by a BOG injection nozzle provided at a lower portion of the combustion chamber. The method of claim 9,
A BOG compressor for compressing the evaporative gas generated in the fuel storage tank;
Further comprising a dual fuel engine (DF Engine) that receives the compressed evaporated gas as fuel. In an evaporative gas treatment system,
A fuel storage tank for storing liquefied gas; And
An evaporative gas treatment system comprising an integrated IGG / GCU according to any one of claims 1 to 8.
KR2020150002751U 2015-04-28 2015-04-28 Combined IGG/GCU and Boil-Off Gas Treatment System Comprising Combined IGG/GCU KR20160003837U (en)

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KR2020150002751U KR20160003837U (en) 2015-04-28 2015-04-28 Combined IGG/GCU and Boil-Off Gas Treatment System Comprising Combined IGG/GCU

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230082233A (en) * 2021-12-01 2023-06-08 한화오션 주식회사 Portable Gas Combustion Unit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140052292A (en) 2012-10-24 2014-05-07 대우조선해양 주식회사 Energy saving type scrubbing system for using combined igg and gcu
KR20140052815A (en) 2013-07-10 2014-05-07 대우조선해양 주식회사 Hybrid fuel supply system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140052292A (en) 2012-10-24 2014-05-07 대우조선해양 주식회사 Energy saving type scrubbing system for using combined igg and gcu
KR20140052815A (en) 2013-07-10 2014-05-07 대우조선해양 주식회사 Hybrid fuel supply system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230082233A (en) * 2021-12-01 2023-06-08 한화오션 주식회사 Portable Gas Combustion Unit

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