KR20080057421A - Gas fuel supply device for controlling methane number in lngc - Google Patents

Gas fuel supply device for controlling methane number in lngc Download PDF

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KR20080057421A
KR20080057421A KR1020060130687A KR20060130687A KR20080057421A KR 20080057421 A KR20080057421 A KR 20080057421A KR 1020060130687 A KR1020060130687 A KR 1020060130687A KR 20060130687 A KR20060130687 A KR 20060130687A KR 20080057421 A KR20080057421 A KR 20080057421A
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gas
methane
methane number
forced
automation system
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KR1020060130687A
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Korean (ko)
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KR100845819B1 (en
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염구섭
장해기
이춘식
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삼성중공업 주식회사
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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
    • 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
    • B63J2099/001—Burning of transported goods, e.g. fuel, boil-off or refuse
    • B63J2099/003—Burning of transported goods, e.g. fuel, boil-off or refuse of cargo oil or fuel, or of boil-off gases, e.g. for propulsive purposes
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
    • Y02T70/5218—Less carbon-intensive fuels, e.g. natural gas, biofuels

Abstract

A gas fuel supply device for controlling a methane number in an LNG carrier is provided to prevent a knocking phenomenon due to decrease of the methane number when a gas fuel is used in a dual fuel engine. A gas fuel supply device for controlling a methane number in an LNG carrier includes a gas analyzer(100), an integrated automation system(110), and a forced evaporation controller(120). The gas analyzer is mounted on a pipe at a position before a gas fuel passed through a heater(40) is supplied into a dual fuel engine(50). The gas analyzer transmits data about the methane number of the evaporated gas measured and analyzed at predetermined periods to the integrated automation system. The integrated automation system compares the input methane number with a minimum required methane number. The forced evaporation controller controls opening angles of a first valve(22) and a second valve(24).

Description

메탄가 제어가 가능한 액화천연가스 수송선의 가스연료공급장치{Gas fuel supply device for controlling methane number in LNGC}Gas fuel supply device for liquefied natural gas transport ships

도 1은 종래 기술에 따른 액화천연가스 수송선의 가스연료공급장치를 도시한 개념도이다.1 is a conceptual diagram illustrating a gas fuel supply apparatus of a liquefied natural gas transport ship according to the prior art.

도 2는 본 발명에 따른 메탄가 제어가 가능한 액화천연가스 수송선의 가스연료공급장치의 일실시예를 도시한 개념도이다. 2 is a conceptual diagram illustrating an embodiment of a gas fuel supply apparatus of a liquefied natural gas transport ship methane value control according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1: 액화천연가스 화물탱크 10: 압축기1: LNG cargo tank 10: compressor

20: 펌프 22: 제 1 조절밸브20: pump 22: first regulating valve

24: 제 2 조절밸브 26: 강제기화기24: second control valve 26: forced vaporizer

30: 미스트세퍼레이터 40: 히터30: mist separator 40: heater

50: 이중연료엔진 100: 가스애널라이져50: dual fuel engine 100: gas analyzer

110: 통합자동화시스템 120: 강제기화기 컨트롤러 110: integrated automation system 120: forced vaporizer controller

본 발명은 메탄가 제어가 가능한 액화천연가스 수송선의 가스연료공급장치에 관한 것으로, 더욱 상세하게는 기화가스를 연료로 사용하는 액화천연가스 수송선에서 가스애널라이져, 통합자동화시스템 및 강제기화기 컨트롤러를 장착하여 적정 메탄가의 기화가스를 연료로 공급할 수 있는 메탄가 제어가 가능한 액화천연가스 수송선의 가스연료공급장치에 관한 것이다.The present invention relates to a gas fuel supply apparatus of a liquefied natural gas transport ship that can control the methane value, and more particularly, by installing a gas analyzer, an integrated automation system and a forced vaporizer controller in a liquefied natural gas transport ship using gaseous gas as fuel. The present invention relates to a gas fuel supply apparatus for a liquefied natural gas transport ship capable of controlling a methane number capable of supplying gaseous gas of a suitable methane value as a fuel.

액화천연가스 수송선에는 고속 및 대(大)마력의 성능을 발휘할 수 있는 스팀터빈추진방식이 주로 사용되었다. 하지만 타 선박에서 주로 사용되는 디젤 엔진에 비하여 효율이 낮은 단점이 있었다. 이러한 연유로 최근에는 스팀터빈추진방식에 비해 친환경적이며, 효율이 높은 전기추진방식이 도입되었다. 전기추진방식의 액화천연가스 수송선은 낮은 산화탄소화합물(Cox)을 배출시킬 수 있어 친환경적이며, 비교적 높은 운항 안정성을 가지고, 스팀터빈추진방식의 액화천연가스 수송선에 비해 약 30% 이상 효율이 높은 장점을 가지고 있다. The liquefied natural gas transport ship mainly employs a steam turbine propulsion method capable of high speed and large horsepower performance. However, there was a disadvantage that the efficiency is lower than the diesel engine mainly used in other ships. For this reason, the electric propulsion method, which is more environmentally friendly and more efficient than the steam turbine propulsion method, has recently been introduced. Electric propulsion LNG carriers are eco-friendly because they can emit low CO oxides, have relatively high operational stability, and are about 30% more efficient than LNG turbine propulsion LNG carriers. Have

이러한 전기추진방식의 액화천연가스 수송선은 이중연료엔진의 등장으로 인해 더욱 다양한 형태로 개발이 진행되고 있다.Due to the emergence of the dual fuel engine, the electric propulsion liquefied natural gas transport ship is being developed in various forms.

도 1은 종래 기술에 따른 액화천연가스 수송선의 가스연료공급장치를 도시한 개념도이다. 도 1을 참조하면, 전기추진방식의 액화천연가스 수송선은 오일연료(예: HFO, DO)와 선택적으로 자연기화가스(NBOG: Natural Boiled-off Gas) 또는 강제기화가스(FBOG: Forced Boiled-off Gas)를 포함하는 기화가스를 연료로 사용할 수 있다. 1 is a conceptual diagram illustrating a gas fuel supply apparatus of a liquefied natural gas transport ship according to the prior art. Referring to FIG. 1, the electric propulsion LNG carrier is an oil fuel (eg, HFO, DO) and optionally a natural boiled-off gas (NBOG) or a forced boiled-off gas (FBOG). Vaporized gas containing Gas) can be used as a fuel.

자연기화가스란 액화천연가스 화물탱크(1) 내부에 보관된 극저온(-160℃ 정도) 액화가스가 자연적으로 기화된 소량의 기화가스인데, 압축기(10)와 히터(40)에 의해 적정 압력 및 온도로 가압 및 가열된 후 이중연료엔진(50)의 연료로 사용된다. The natural vaporization gas is a small amount of vaporization gas in which the cryogenic (about 160 ° C.) liquefied gas stored in the liquefied natural gas cargo tank 1 is naturally vaporized. After being pressurized and heated to a temperature, it is used as a fuel of the double fuel engine 50.

강제기화가스란 자연기화가스의 부족 시 액화천연가스 화물탱크(1)로부터 액화가스를 인출하여 강제기화시킨 기화가스를 말한다. 강제기화가스는 액화천연가스 화물탱크(1)로부터 액화가스를 인출하는 펌프(20)와, 상기 펌프(20)에 의해 인출된 액화가스를 강제기화시키는 강제기화기(26, Forcing Vaporizer)와, 상기 펌프(20)와 상기 강제기화기(26) 사이의 배관 상에 설치되어 관내 유량을 조절하는 제 1 조절밸브(22)와, 상기 강제기화기(26)로부터 기화된 기화가스의 감온을 위해 냉매로서 사용될 액화가스의 바이패스유량을 조절하는 제 2 조절밸브(24)와, 기화되고 감온된 기화가스에 존재하는 액상입자를 걸러내는 미스트세퍼레이터(30, Mist Separator) 및 상기 미스트세퍼레이터(30)에 의해 액상입자가 걸러진 기화가스를 연료조건에 맞춰 가열하는 히터(40)를 포함하는 구성에 의해 생성되고, 이중연료엔진(50)의 연료로 사용된다. Forced vaporization gas refers to a vaporization gas which is forced to vaporize by liquefied gas from the liquefied natural gas cargo tank (1) when the natural vaporization gas is insufficient. The forced vaporization gas includes a pump 20 for drawing liquefied gas from the liquefied natural gas cargo tank 1, a forced vaporizer 26 forcing the liquefied gas withdrawn by the pump 20, and the A first control valve 22 installed on the pipe between the pump 20 and the forced vaporizer 26 to adjust the flow rate in the pipe and to be used as a refrigerant for reducing the temperature of vaporized gas vaporized from the forced vaporizer 26. The second control valve 24 for controlling the bypass flow rate of the liquefied gas, the mist separator (30, Mist Separator) for filtering the liquid particles present in the vaporized and reduced temperature vaporized gas and the mist separator 30 It is produced by the structure including the heater 40 which heats the particle | grains filtered vaporization gas according to fuel conditions, and is used as the fuel of the dual fuel engine 50. As shown in FIG.

그런데, 이러한 기화가스를 이중연료엔진(50)의 연료로 사용할 때에는 기화가스의 메탄가(Methane Number)가 이중연료엔진(50)에서 요구하는 조건 메탄가 보다 수준 이상이 되어야 한다. 이는 이중연료엔진(50)에서 노킹(Knocking)현상이 발생되는 것을 방지하기 위함이다. 자연기화가스는 성분이 대부분 메탄으로 이루어져 있기 때문에 메탄가가 엔진 요구치보다 높아 별도의 주의가 필요하지 않지만 강제기화가스는 메탄외에도 에탄, 프로판, 부탄 같은 성분이 함유되어 있어 메탄가가 엔진 요구치보다 낮을 수 있어 주의가 필요하다. 이를 위해 강제 기화된 천연가스를 저온으로 유지하여 중탄화수소 성분들이 액상으로 남아 미스트세퍼레이터(30)에서 걸러질 수 있도록 하고 있다. However, when using the vaporized gas as the fuel of the dual fuel engine 50, the methane number of the vaporized gas (methane number) should be higher than the condition methane value required by the dual fuel engine (50). This is to prevent knocking from occurring in the dual fuel engine 50. Since natural methane gas is composed mostly of methane, methane value is higher than the engine requirement, so no special care is required.Forcible gas, however, contains ethane, propane, butane, etc. Need attention To this end, the forced vaporized natural gas is kept at a low temperature so that the heavy hydrocarbon components remain in the liquid phase and can be filtered out of the mist separator 30.

하지만, 종래 기술에 따르면 이중연료엔진(50)으로 공급되기 전에 기화가스 내 메탄가를 제어해 줄 수 있는 장치가 없었다. 단지, 이중연료엔진(50)에 노킹경보기(60, Knocking Alarm)를 설치하여, 노킹현상을 감지한 운전자에 의해 문제를 해결하는 방식이 전부였다. 하지만, 이러한 노킹경보기(60)와 같은 사후 대책으로는, 이중연료엔진(50)의 손상을 미리 방지할 수 없는 문제점으로 작용하였다. However, according to the prior art, there was no device capable of controlling the methane value in the vaporized gas before being supplied to the dual fuel engine 50. However, by installing a knocking alarm (60, Knocking Alarm) in the dual fuel engine 50, the problem was solved by the driver who detected the knocking phenomenon. However, as a countermeasure such as the knocking alarm 60, the damage to the dual fuel engine 50 acted as a problem that cannot be prevented in advance.

따라서, 본 발명에서는 상기와 같은 종래 기술의 문제점을 극복하기 위하여, 기화가스를 연료로 사용하는 액화천연가스 수송선에서 이중연료엔진으로 공급되기 전에 기화가스 내 메탄가를 제어하여 노킹현상을 사전에 방지할 수 있는 메탄가 제어가 가능한 액화천연가스 수송선의 가스연료공급장치를 제공하는 것을 기술적 과제로 삼는다. Therefore, in the present invention, in order to overcome the problems of the prior art as described above, in order to prevent knocking phenomenon by controlling the methane value in the vaporized gas before being supplied to the dual fuel engine in the liquefied natural gas transport ship using the vaporized gas as fuel. It is a technical task to provide a gas fuel supply device for a liquefied natural gas carrier that can control methane.

상기와 같은 기술적 과제를 달성하기 위하여, 본 발명의 바람직한 실시예는 엔진의 연료공급배관 입구측에 장착되어, 연료로 공급될 기화가스의 메탄가(Methane Number)를 분석하는 가스애널라이져; 상기 가스애널라이져로부터 분석된 메탄가를 전송받아 기 입력된 조건 메탄가와 비교 처리하는 통합자동화시스템; 상기 통합자동화시스템에서 산출된 메탄가 비교 데이터를 이용하여, 강제기화시킬 액화가스의 유량을 조절하는 제 1 조절밸브와, 강제기화된 기화가스의 냉매로 사용될 액화가스의 유량을 조절하는 제 2 조절밸브를 제어하는 강제기화기 컨트롤러를 포함하는 것을 특징으로 하는 메탄가 제어가 가능한 액화천연가스 수송선의 가스연료공급장치를 제공한다. In order to achieve the above technical problem, a preferred embodiment of the present invention is installed on the fuel supply pipe inlet side of the engine, the gas analyzer for analyzing the methane number (Methane Number) of the vaporized gas to be supplied to the fuel; An integrated automation system that receives the analyzed methane number from the gas analyzer and compares the methane number with the previously inputted condition methane number; Using the methane value comparison data calculated in the integrated automation system, the first control valve for adjusting the flow rate of the liquefied gas to be forced vaporization, and the second control valve for adjusting the flow rate of the liquefied gas to be used as the refrigerant of the forced gasification gas It provides a gas fuel supply device of the liquefied natural gas transport ship that can control the methane value, characterized in that it comprises a forced vaporizer controller for controlling.

이하, 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 상세히 설명한다. Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

도면에서, 도 2는 본 발명에 따른 메탄가 제어가 가능한 액화천연가스 수송선의 가스연료공급장치의 일실시예를 도시한 개념도이다. 2 is a conceptual diagram illustrating an embodiment of a gas fuel supply apparatus of a liquefied natural gas transport ship that can control the methane value according to the present invention.

도 1을 참조하면, 본 실시예는 액화천연가스 화물탱크(1)와, 상기 액화천연가스 화물탱크로부터 액화가스를 인출하는 펌프(20)와, 인출된 액화가스를 강제기화시키는 강제기화기(26)와, 상기 강제기화기(26)로 공급될 액화가스의 유량을 조절하는 제 1 조절밸브(22)와, 상기 강제기화기(26)로부터 강제기화된 기화가스의 감온을 위해 냉매로서 사용될 액화가스의 바이패스유량을 조절하는 제 2 조절밸브(24)와, 감온된 기화가스에 존재하는 액상입자를 걸러내는 미스트세퍼레이터(30, Mist Separator)와, 상기 미스트세퍼레이터(30)에서 걸러진 기화가스를 연료조건에 맞춰 가열하는 히터(40)와, 자연기화가스를 저압 압축시키는 압축기(10)를 포함하는 액화천연가스수송선의 가스연료공급장치에서, 이중연료엔진(50)으로 공급되기 전 배관 상에 장착되는 가스애널라이져(100, Gas Analyzer)와, 상기 가스애널라이져(100)에서 분석된 메탄가에 대한 데이터를 전송 받아 비교 처리하는 통합자동화시스템(110)과, 상기 통합자동화시스템(110)에서 산출된 메탄가 비교 데이터를 이용하여 제 1 조절밸브(22) 및 제 2 조절밸브(24)의 개도(開道)를 제어하는 강제기화기 컨트롤러(120)를 포함하여 구성된다. Referring to FIG. 1, the present embodiment is a liquefied natural gas cargo tank 1, a pump 20 for extracting liquefied gas from the liquefied natural gas cargo tank, and a forced vaporizer 26 forcibly vaporizing the extracted liquefied gas. ), A first control valve 22 for adjusting the flow rate of the liquefied gas to be supplied to the forced vaporizer 26, and the liquefied gas to be used as a refrigerant for the temperature reduction of the vaporized gas vaporized from the forced vaporizer 26 The second control valve 24 for controlling the bypass flow rate, the mist separator 30 for filtering the liquid particles present in the reduced temperature vaporized gas, and the vaporized gas filtered by the mist separator 30 are fuel conditions. In the gas fuel supply apparatus of the liquefied natural gas transport ship including a heater 40 for heating in accordance with the compressor, and a compressor 10 for low-pressure compression of the natural vaporization gas, which is mounted on the pipe before being supplied to the double fuel engine 50 Gas Ana Gas analyzer (100), the integrated automation system 110 for receiving and comparing the data for the methane value analyzed by the gas analyzer 100, and the methane value comparison data calculated by the integrated automation system (110) It is configured to include a forced vaporizer controller 120 to control the opening degree of the first control valve 22 and the second control valve 24 by using.

가스애널라이져(100)는 기화가스 내의 성분을 분석하는 분석장치로서, 본 실시예에서는 이중연료엔진(50)으로 공급되는 기화가스 내 메탄(Methane)을 일정 주기로 분석 처리해야 하므로, 구체적으로는 메탄 검지기를 사용하는 것이 바람직하다. 이러한 가스애널라이져(100)는 히터(40)를 통과한 기화가스가 상기 이중연료엔진(50)으로 공급되기 전 배관 상에 장착되는 것이 좋다. 가스애널라이져(100)에서 일정 주기마다 측정 분석된 기화가스의 메탄가에 대한 데이터는 통합자동화시스템(110)으로 전송된다.Gas analyzer 100 is an analysis device for analyzing the components in the vaporized gas, in this embodiment, since the methane in the vaporized gas supplied to the dual fuel engine 50 must be analyzed at regular intervals, specifically methane It is preferable to use a probe. The gas analyzer 100 may be mounted on a pipe before the vaporized gas passing through the heater 40 is supplied to the dual fuel engine 50. The gas analyzer 100 transmits the data on the methane number of the vaporized gas measured and analyzed at regular intervals to the integrated automation system 110.

통합자동화시스템(110)은 액화천연가스 수송선의 통합자동화시스템(IAS: Integrated Automation System)을 말하는 것으로, 액화천연가스 수송선의 운항상태를 감시 및 제어하여 운항 및 항해와 관련된 모든 상황을 예측 분석하는 장치이다. 이러한 통합자동화시스템(110)은 액화천연가스 수송선의 현재 주요 상태를 데이터베이스화하여 기 입력된 기준 수치 또는 과거의 수치와 비교 분석함으로써, 각종 현상을 원격 감시하는 기능을 보유하고 있다. The integrated automation system 110 refers to an integrated automation system (IAS) of a liquefied natural gas carrier. An apparatus for predicting and analyzing all situations related to operation and navigation by monitoring and controlling the operational state of a liquefied natural gas carrier. to be. The integrated automation system 110 has a function of remotely monitoring various phenomena by analyzing the current main state of the liquefied natural gas transporter by database and comparing it with a previously input reference value or past value.

본 실시예에 따른 통합자동화시스템(110)은 상기 가스애널라이져(100)로부터 측정 분석된 기화가스 메탄가를 전송 받은 후, 전송 받은 메탄가를 기 입력된 조건 메탄가(이는 "이중연료 엔진에서 노킹현상이 유발되지 않는 최소 요구 메탄가"를 뜻한다)와 비교하는 작업을 수행한다. 이후 산출된 메탄가 비교 데이터는 강제기화기 컨트롤러(120)로 전달된다. The integrated automation system 110 according to the present embodiment receives the gaseous gas methane value measured and analyzed from the gas analyzer 100, and then inputs the received methane value to the conditional methane value (which is referred to as knocking phenomenon in the dual fuel engine). To the minimum required methane number that is not induced. The methane value comparison data calculated thereafter is transmitted to the forced vaporizer controller 120.

강제기화기 컨트롤러(120)는 제 1 밸브(22)와 제 2 밸브(24)의 개도를 제어하는 장치이다. 이러한 강제기화기 컨트롤러(120)는 강제기화기(26)로 공급되는 액화가스의 유량을 조절하는 제 1 밸브(22)를 제어함으로써, 강제기화된 기화가스의 공급량을 제어할 수 있으며, 또한, 강제기화된 기화가스의 냉매로 작용될 액화가스의 유량을 조절하는 제 2 밸브(22)를 제어함으로써, 강제기화된 기화가스의 온도를 감온시켜 기화가스 성분 중 미스트세퍼레이터(30)에서 액상입자로 걸러질 중탄화수소(Heavy Hydrocarbon, 예를 들면 Propane, Butane 등)의 양을 제어할 수 있다. 기화가스 성분 중 중탄화수소의 양이 감소한다는 것은 메탄가가 높아진다는 의미이다. The forced vaporizer controller 120 is a device for controlling the opening degree of the first valve 22 and the second valve 24. The forced vaporizer controller 120 may control the supply amount of the forced vaporized gas by controlling the first valve 22 for adjusting the flow rate of the liquefied gas supplied to the forced vaporizer 26, and also, forced vaporization By controlling the second valve 22 for controlling the flow rate of the liquefied gas to be used as the refrigerant of the vaporized gas, the temperature of the forced vaporized gas is reduced to be filtered by the mist separator 30 from the mist separator 30 to the liquid particles. The amount of heavy hydrocarbons (eg Propane, Butane, etc.) can be controlled. Reducing the amount of bicarbonate in the gaseous gas component means that methane is higher.

다음에서, 본 발명에 따른 바람직한 실시예를 크게 두 가지 경우로 나누어 살펴보고자 한다. In the following, the preferred embodiment according to the present invention will be divided into two cases.

먼저, 가스애널라이져(100)에서 측정된 기화가스의 메탄가가 통합자동화시스템(100)에 기 입력된 조건 메탄가보다 낮아지려고 하면, 강제기화기 컨트롤러(120)는 제 2 조절밸브(24)를 개방하여, 강제기화된 기화가스와의 열교환 시 냉매로 사 용할 액화가스를 바이패스 유동시킨다. 이로 인하여, 강제기화된 기화가스가 감온되면, 기화가스의 성분 중 중탄화수소인 프로판 또는 부탄은 액상입자로 만들어진다. 이후 이러한 중탄화수소 액상입자들은 미스트세퍼레이터(30)에서 걸러져 다시 액화천연가스 화물탱크로 송급되어 저장되고, 메탄가가 높은 기화가스가 이중연료엔진의 연료로 사용될 수 있다. First, when the methane value of the vaporization gas measured by the gas analyzer 100 is lower than the condition methane value previously input to the integrated automation system 100, the forced vaporizer controller 120 opens the second control valve 24 Bypass the liquefied gas to be used as the refrigerant when exchanging heat with the forced vaporized gas. Therefore, when the forced vaporized gas is reduced in temperature, propane or butane, which is a heavy hydrocarbon, of the components of the vaporized gas is made of liquid particles. Afterwards, these heavy hydrocarbon liquid particles are filtered out of the mist separator 30 and fed back to the LNG tank, where the methane gas can be used as a fuel for the dual fuel engine.

이때, 상기 미스트세퍼레이터(30)에선 많은 중탄화수소가 액상입자의 형태로 걸러지게 되므로, 공급 연료 유지 차원에서 강제기화기(26)로 유입되는 액화가스의 양을 증가시키기 위해, 이의 기능을 담당하는 제 1 조절밸브(22)를 더 많이 개방해주는 것이 좋다. At this time, in the mist separator 30, a lot of heavy hydrocarbons are filtered in the form of liquid particles, so as to increase the amount of liquefied gas flowing into the forced vaporizer 26 in order to maintain the supply fuel, the agent responsible for its function. 1 It is good to open more control valve (22).

한편, 상기 가스애널라이져(100)에서 측정된 기화가스의 메탄가가 상기 통합자동화시스템(100)에 기 입력된 조건 메탄가에 비해 지나치게 높은 경우에는, 상기 강제기화기 컨트롤러(120)가 상기 제 2 조절밸브(24)를 폐쇄하여 강제기화된 기화가스를 감온시키지 않는다. 이로 인하여, 노킹이 발생되지 않는 메탄가 범위 내의 기화가스가 이중연료엔진의 연료로서 공급될 수 있다. On the other hand, when the methane value of the vaporization gas measured by the gas analyzer 100 is too high compared to the condition methane value previously input to the integrated automation system 100, the forced vaporizer controller 120 is the second control valve. (24) is closed to reduce the temperature of the forced vaporized gas. For this reason, the vaporization gas in the methane number range in which knocking does not generate | occur | produce can be supplied as fuel of a dual fuel engine.

이상에서 본 발명에 따른 메탄가 제어 가능한 액화천연가스 수송선의 가스연료공급장치에 대해 설명하였다. The gas fuel supply apparatus of the liquefied natural gas transport ship that can control the methane according to the present invention has been described above.

이러한 본 발명의 기술적 구성은 본 발명이 속하는 기술분야의 당업자가 본 발명의 그 기술적 사상이나 필수적 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다.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.

그러므로 이상에서 기술한 실시예들은 모든 면에서 예시적인 것이며, 한적적인 것이 아닌 것으로 이해되어야 하고, 본 발명의 범위는 전술한 상세한 설명보다는 후술하는 특허청구범위에 의하여 나타내어지며, 특허청구범위의 의미 및 범위 그리고 그 등가개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다. Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

상기에서 살펴본 바와 같이, 본 발명인 메탄가 제어가 가능한 액화천연가스 수송선의 가스연료공급장치에 따르면, 기화가스를 연료로 사용하는 액화천연가스 수송선에서 기화가스 내 메탄가를 분석하는 가스애널라이져, 분석된 메탄가를 연료에서 요구하는 조건 메탄가와 비교 처리하는 통합자동화시스템 및 메탄가 비교 데이터를 통해 강제기화된 기화가스의 메탄가를 제어할 수 있는 강제기화기 컨트롤러를 이용하여, 기화가스를 이중연료엔진의 연료로 사용 시 메탄가 저하로 인한 노킹(Knocking)현상을 사전에 방지할 수 있는 효과가 있다.As described above, according to the gas fuel supply apparatus of the liquefied natural gas transport ship that can control the methane value of the present invention, the gas analyzer for analyzing the methane value in the liquefied natural gas transport ship using gaseous gas as fuel, the analyzed methane value When the gas is used as the fuel of the dual fuel engine, the integrated automation system that compares the gas condition with the methane value and the forced vaporizer controller that can control the methane value of the forced vaporized gas through the methane value comparison data. There is an effect that can prevent in advance the knocking (knocking) caused by the methane price.

Claims (1)

엔진의 연료공급배관 입구측에 장착되어, 연료로 공급될 기화가스의 메탄가(Methane Number)를 분석하는 가스애널라이져;A gas analyzer installed at an inlet side of an engine fuel supply pipe and analyzing a methane number of vaporized gas to be supplied as fuel; 상기 가스애널라이져로부터 분석된 메탄가를 전송받아 기 입력된 조건 메탄가와 비교 처리하는 통합자동화시스템; 및An integrated automation system that receives the analyzed methane number from the gas analyzer and compares the methane number with the previously inputted condition methane number; And 상기 통합자동화시스템에서 산출된 메탄가 비교 데이터를 이용하여, 강제기화시킬 액화가스의 유량을 조절하는 제 1 조절밸브와, 강제기화된 기화가스의 냉매로 사용될 액화가스의 유량을 조절하는 제 2 조절밸브를 제어하는 강제기화기 컨트롤러;를 포함하는 것을 특징으로 하는 메탄가 제어가 가능한 액화천연가스 수송선의 가스연료공급장치.Using the methane value comparison data calculated in the integrated automation system, the first control valve for adjusting the flow rate of the liquefied gas to be forced vaporization, and the second control valve for adjusting the flow rate of the liquefied gas to be used as the refrigerant of the forced gasification gas Forced carburetor controller for controlling the gas fuel supply apparatus of the liquefied natural gas transport ship that can control the methane value.
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