KR100733157B1 - Lng carrier function test mechanism - Google Patents

Lng carrier function test mechanism Download PDF

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KR100733157B1
KR100733157B1 KR1020060081860A KR20060081860A KR100733157B1 KR 100733157 B1 KR100733157 B1 KR 100733157B1 KR 1020060081860 A KR1020060081860 A KR 1020060081860A KR 20060081860 A KR20060081860 A KR 20060081860A KR 100733157 B1 KR100733157 B1 KR 100733157B1
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nitrogen
liquid nitrogen
liquid
unit
gas
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KR1020060081860A
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Korean (ko)
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동문수
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모던산업가스(주)
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    • 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
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • 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
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • 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
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/028—Special adaptations of indicating, measuring, or monitoring equipment having the volume as the parameter
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0621—Volume
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/033—Treating the boil-off by recovery with cooling
    • F17C2265/035—Treating the boil-off by recovery with cooling with subcooling the liquid phase

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

A nitrogen supplying system for LNG ship cooling test and replacement is provided to stably test intensities of a pipe and a tank of an LNG ship and to remove remaining explosive gas. A nitrogen supplying system for LNG ship cooling test and replacement includes a liquid nitrogen storing unit(10), a liquid nitrogen supply controlling unit(20), a gaseous nitrogen supplying unit(30), a hybrid nitrogen supplying unit(40), and a controlling unit(50). The liquid nitrogen storing unit is supplied with nitrogen of a liquid condition from a tank lorry vehicle, and stores the nitrogen with predetermined pressure and temperature. The liquid nitrogen supply controlling unit is connected with the liquid nitrogen storing unit by a transfer pipe, and measures and controls a volume of liquid nitrogen discharged from the liquid nitrogen storing unit. The gas nitrogen supplying unit is connected with the liquid nitrogen supply controlling unit by the transfer pipe, heats the supplied liquid nitrogen, converts the liquid nitrogen to gaseous nitrogen, and supplies the gaseous nitrogen to a pipe and a tank of a ship. The hybrid nitrogen supplying unit is connected with the gaseous nitrogen storing unit and the liquid nitrogen supply controlling unit by the transfer pipe, and mixes the liquid nitrogen and the gaseous nitrogen, and supplies the mixed nitrogen to the pipe and the tank of the ship. The controlling unit detects pressure, temperature, and flux at a plurality of valves installed at each transfer pipe, and controls the pressure, temperature, and flux of each part by a user.

Description

ＬＮＧ선박 냉각시험 및 치환용 질소공급시스템{LNG carrier function test mechanism}LNG carrier cooling test and replacement nitrogen supply system {LNG carrier function test mechanism}

도 1은 본 발명의 일실시예에 따른 LNG선박 냉각시험 및 치환용 질소공급시스템의 개략도.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a LNG ship cooling test and replacement nitrogen supply system according to an embodiment of the present invention. FIG.

도 2는 도 1의 혼합질소공급부 상세단면도.2 is a detailed cross-sectional view of the mixed nitrogen supply portion of FIG.

* 도면의 주요 부분에 대한 부호의 설명 * Description of the Related Art [0002]

10:액체질소저장부 11:저장탱크10: liquid nitrogen storage part 11: storage tank

12:탱크가압기화기 20:액체질소공급조절부12: tank pressurized vaporizer 20: liquid nitrogen supply regulator

21:유량계 22:제어밸브21: Flow meter 22: Control valve

30:기체질소공급부 31:스팀기화기30: gaseous nitrogen supply unit 31: steam vaporizer

32:스팀제어밸브 33:질소가스조절밸브32: Steam control valve 33: Nitrogen gas control valve

40:혼합질소공급부 41:격판40: mixed nitrogen supply part 41: diaphragm

42:유입구 43:배출구42: inlet 43: outlet

44:질소분사노즐 50:콘트롤부44: nitrogen injection nozzle 50:

60:이송관 70:탱크로리차량60: Transfer pipe 70: Tank roller car

80:LNG선박80: LNG carrier

본 발명은 질소공급시스템에 관한 것으로서, 특히 액화된 LNG를 적재하여 운송하는 LNG운반선에서 탱크 및 파이프의 안정성을 점검하기 위하여 강도를 시험하고 잔여 증발가스를 제거하기 위한 질소를 공급하는 LNG선박 냉각시험 및 치환용 질소공급시스템에 관한 것이다.The present invention relates to a nitrogen supply system, and more particularly, to an LNG ship cooling test system for testing the strength of a tank and a pipe in an LNG carrier carrying the liquefied LNG and for supplying nitrogen to remove residual evaporation gas And a nitrogen supply system for replacement.

일반적으로, LNG선박은 배관을 통해 천연가스의 운송이 용이하지 못한 곳에서 기체상태의 천연가스를 원격지역으로 수송하기 위하여 -162℃정도의 극저온으로 액화시켜 저장탱크에 담아 운송하는 선박이다.Generally, LNG ships are liquefied at a cryogenic temperature of -162 ° C in a storage tank for transporting natural gas in a gaseous state to a remote area where natural gas is not easily transported through pipelines.

따라서, LNG선박은 건조시에 -162℃내외의 액화천연가스를 소정압력 상태로 저장하더라도 파이프 및 탱크가 견딜 수 있는지 폭발성이 없는 액체질소(N2)를 투입하여 강도시험을 하고, LNG 운송 시작전에 수분과 산소 및 기타 이물질을 제거하는 퍼지작업을 하게 된다.Therefore, even if LNG vessels are stored at -162 ° C or less at a certain pressure during the drying process, LNG vessels are tested for strength by injecting liquid nitrogen (N 2 ), which can withstand pipes and tanks, Before doing the purge work to remove moisture, oxygen and other foreign matter.

또한, 건조완료되어 운항중인 LNG선박이 목적지에 도착하여 액체상태의 천연가스를 배출하면 LNG선박내 저장탱크와 파이프 내부에 잔여하는 가스로 인한 폭발방지와 탱크내부에서 작업자의 안전한 작업을 위하여 기체질소를 투입하여 잔여가스를 제거한 후에 탱크내부 작업 및 천연가스를 재저장하도록 각국 선급협회는 요구하고 있다.When the LNG carrier arrives at the destination and discharges the liquid natural gas, it is necessary to prevent the explosion due to the residual gas in the LNG storage tank and pipe, and to ensure the safe operation of the operator inside the tank, To remove the residual gas and then to work inside the tank and to restore the natural gas.

그러나, LNG선박은 천연가스의 액상온도인 -162℃내외의 강도를 견디도록 설계가 됨으로 인하여, -196℃정도인 액체질소를 LNG선에 공급하면 파이프 및 탱크에 구조 적 결함을 발생할 수 있는 위험을 내재하게 된다.However, since LNG ships are designed to withstand the temperature of about -162 ℃, which is the liquid temperature of natural gas, the supply of liquid nitrogen at -196 ℃ to LNG can cause structural defects in pipes and tanks. .

즉, LNG선박의 설계강도에 상관없이 -196℃의 초저온상태인 액체질소를 LNG선박의 파이프와 탱크내부로 공급함으로 인해 크랙이 발생하여, 이후 액체상태의 고압 천연가스를 투입시 파이프 및 탱크의 파손으로 인한 폭발의 위험을 내재하게 되는 문제점이 있다.That is, irrespective of the design strength of the LNG carrier, the liquid nitrogen at -196 ° C is supplied to the pipe and tank of the LNG carrier and cracks are generated. Then, when the high-pressure natural gas in the liquid state is supplied, There is a problem that the risk of explosion due to breakage is inherent.

본 발명은 상술한 문제점을 해결하기 위하여 창출된 것으로서, LNG선박에 투입하는 질소의 유입온도를 LNG선박 파이프 및 탱크에 손상이 가지않는 상태로 공급하기 위한 LNG선박 냉각시험 및 치환용 질소공급시스템을 제공하는 것을 목적으로 한다.The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an LNG ship cooling test and a replacement nitrogen supply system for supplying an inlet temperature of nitrogen to an LNG ship without damaging the LNG ship pipe and tank The purpose is to provide.

본 발명의 다른 목적 및 장점들은 하기에 설명될 것이며, 본 발명의 실시예에 의해 알게 될 것이다.Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention.

또한, 본 발명의 목적 및 장점들은 특허청구범위에 나타낸 수단 및 조합에 의해 실현될 수 있다.Further, the objects and advantages of the present invention can be realized by the means and the combination shown in the claims.

상기와 같은 목적을 달성하기 위한 본 발명의 LNG선박 냉각시험 및 치환용 질소공급시스템은, 탱크로리차량에서 액체상태의 질소를 공급받아 일정압력 및 온도상태로 저장하는 액체질소저장부와; 상기 액체질소저장부와 이송관으로 연결되어 상기 액체질소저장부에서 배출되는 액체질소량을 파악하여 조절하는 액체질소공급조절부와; 상기 액체질소공급조절부와 이송관으로 연결되어 배출공급되는 액체질소를 가열하여 가스상태의 질소로 변환하여 선박의 파이프 및 탱크로 공급하는 기체질소공급부와; 상 기 기체질소공급부 및 상기 액체질소공급조절부와 이송관으로 연결된 상태에서 액체질소와 가스상태의 질소를 혼합하여 선박의 파이프 및 탱크로 공급하는 혼합질소공급부; 및, 상기 액체질소저장부, 상기 액체질소공급조절부, 상기 기체질소공급부, 상기 혼합질소공급부와 더불어 각각의 이송관에 구비되는 복수개의 밸브에서 압력, 온도, 유량을 감지하여 사용자가 각 부분의 압력, 온도, 유량을 조절할 수 있게 하는 콘트롤부를 포함한다.In order to accomplish the above object, the present invention provides a LNG ship cooling test and a replacement nitrogen supply system, comprising: a liquid nitrogen storage unit for storing nitrogen in a liquid state in a tank lorry under a predetermined pressure and temperature; A liquid nitrogen supply regulating unit connected to the liquid nitrogen storage unit through a transfer pipe to detect and regulate an amount of liquid nitrogen discharged from the liquid nitrogen storage unit; A gas nitrogen supply unit connected to the liquid nitrogen supply regulating unit through a transfer pipe to heat the liquid nitrogen discharged and supplied to convert the gas into nitrogen in a gaseous state and supply the gas to a pipe and a tank of the ship; A mixed nitrogen supply unit for mixing liquid nitrogen and gaseous nitrogen with the gaseous nitrogen supply unit and the liquid nitrogen supply adjustment unit in a connected state by a transfer pipe and supplying the mixed gas to pipes and tanks of the ship; And a controller for sensing pressure, temperature, and flow rate of the plurality of valves provided in the respective transfer tubes in addition to the liquid nitrogen reservoir, the liquid nitrogen supply controller, the gaseous nitrogen supplier, and the mixed nitrogen supplier, And a control unit for controlling the pressure, the temperature, and the flow rate.

이하 첨부된 도면을 참조로 본 발명의 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정되어서는 아니되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.Prior to this, terms and words used in the present specification and claims should not be construed as being limited to ordinary or dictionary terms, and the inventor should appropriately define the concept of terms in order to describe his or her invention in the best way The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

따라서, 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일 실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원시점에 있어서 이들을 대체할 수 있는 다양한 균등물과 변형예들이 있을 수 있음을 이해하여야 한다.Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

도 1은 본 발명에 의한 바람직한 일실시예에 따른 LNG선박 냉각시험 및 치환용 질소공급시스템의 개략도이다.1 is a schematic view of a LNG ship cooling test and a replacement nitrogen supply system according to a preferred embodiment of the present invention.

도시된 바와 같이 본 실시예의 LNG선박 냉각시험 및 치환용 질소공급시스템은, 생산지에서 탱크로리차량(70)으로 이송된 액체질소를 저장하는 액체질소저장부(10)와, 상기 액체질소저장부(10)에 저장된 액체질소의 배출공급량을 파악제어하는 액체질소공급조절부(20)를 구비하고 있다.As shown, the LNG ship cooling test and replacement nitrogen supply system of the present embodiment includes a liquid nitrogen storage section 10 for storing the liquid nitrogen transferred from the production site to the tank truck vehicle 70, and the liquid nitrogen storage section 10 And a liquid nitrogen supply regulating unit 20 for controlling the discharge amount of liquid nitrogen stored in the liquid nitrogen supply regulating unit 20.

그리고, 상기 액체질소공급조절부(20)에서 공급되는 액체질소를 가열하여 가스상태의 질소로 LNG선박(80)에 공급하는 기체질소공급부(30)와, 상기 액체질소공급조절부(20)에서 공급되는 액체질소와 상기 기체질소공급부(30)에서 가온된 가스상태의 질소를 혼합하여 LNG선박(80)에 공급하는 혼합질소공급부(40)를 구비하고 있다.A gaseous nitrogen supplier 30 for heating the liquid nitrogen supplied from the liquid nitrogen supply regulator 20 to supply the gaseous nitrogen to the LNG carrier 80; And a mixed nitrogen supply unit (40) for mixing the supplied liquid nitrogen with nitrogen gas heated in the gaseous nitrogen supply unit (30) and supplying the mixed gas to the LNG carrier (80).

또한, 상기 액체질소저장부(10), 상기 액체질소공급조절부(20), 상기 기체질소공급부(30), 상기 혼합질소공급부(40)와 더불어 각각의 이송관(60)에 구비되는 복수개의 밸브에서 압력, 온도, 유량을 감지하여 사용자가 각 부분의 압력, 온도, 유량을 조절할 수 있게 하는 콘트롤부(50)를 구비하고 있다.In addition to the liquid nitrogen storage section 10, the liquid nitrogen supply regulating section 20, the gaseous nitrogen supply section 30 and the mixed nitrogen supply section 40, a plurality of And a control unit 50 for detecting the pressure, temperature, and flow rate of the valve so that the user can adjust the pressure, temperature, and flow rate of each part.

상기 액체질소저장부(10)는 액체질소 생산지에서 탱크로리차량(70)에 의해 이송된 액체질소를 저장하는 부분이다.The liquid nitrogen storing portion 10 is a portion storing liquid nitrogen transferred by the tank truck 70 in the liquid nitrogen producing place.

이러한, 상기 액체질소저장부(10)에는 상기 탱크로리차량(70)에서 액체질소가 유입충전되는 저장탱크(11)와, 상기 탱크로리차량(70)에서 상기 저장탱크(11) 내부로 유입되는 액체질소를 5내지 10Kg/cm2의 압력상태로 저장시키는 탱크가압기화기(12)가 설치된다.The liquid nitrogen storage unit 10 is provided with a storage tank 11 through which liquid nitrogen is charged in the tanker vehicle 70 and a liquid nitrogen introduced into the storage tank 11 from the tanker vehicle 70 Is stored in a pressure state of 5 to 10 kg / cm < 2 & gt ;.

이때, 상기 저장탱크(11)에 저장되는 액체질소는 상기 탱크로리차량(70)에 구비된 펌프에 의해 상기 저장탱크(11)와 상기 탱크로리차량(70)을 순환하면서 온도가 상승되어 상기 저장탱크(11)에 저장시에는 상기 탱크가압기화기(12)에 의해 5내지 10Kg/cm2의 압력상태와 -180℃ 상태가 유지된다.At this time, the liquid nitrogen stored in the storage tank 11 is circulated through the storage tank 11 and the tank truck 70 by the pump installed in the tank truck 70, 11, a pressure of 5 to 10 kg / cm < 2 > and a temperature of -180 DEG C are maintained by the tank pressurized vaporizer (12).

상기 액체질소공급조절부(20)는 이송관(60)에 의해 상기 액체질소저장부(10)와 연결되어 상기 저장탱크(11)에서 배출되는 액체질소의 공급량을 LNG선박(80)의 냉각시험 및 잔여가스처리작업을 위하여 필요에 따라 조절하는 부분이다.The liquid nitrogen supply regulating unit 20 is connected to the liquid nitrogen storage unit 10 by a transfer pipe 60 to supply the supply amount of liquid nitrogen discharged from the storage tank 11 to the cooling test of the LNG carrier 80 And the part to be adjusted as necessary for the residual gas treatment operation.

이러한, 상기 액체질소공급조절부(20)에는 상기 이송관(60)을 통해 상기 액체질소저장부(10)에서 배출이송되는 액체질소의 이송량을 감지하는 유량계(21)와, 상기 이송관(60)을 통해 상기 액체질소저장부(10)에서 이송되는 액체질소의 이송량을 제어하는 제어밸브(22)가 설치된다.The liquid nitrogen supply regulating unit 20 includes a flow meter 21 for sensing the amount of liquid nitrogen transferred from the liquid nitrogen storage unit 10 through the transfer pipe 60, A control valve 22 for controlling the amount of liquid nitrogen transferred from the liquid nitrogen storage part 10 is provided.

상기 기체질소공급부(30)는 상기 액체질소공급조절부(20)와 이송관(60)으로 연결된 상태에서 공급되는 액체질소를 가열하여 LNG선박(80)의 파이프 및 탱크에 질소를 가스상태로 공급하여 잔여 LNG가스를 제거되게 하는 부분이다.The gaseous nitrogen supplier 30 heats the supplied liquid nitrogen in a state where the gaseous nitrogen supplier 30 is connected to the liquid nitrogen supply controller 20 and the transfer pipe 60 to supply nitrogen gas to the pipe and tank of the LNG carrier 80 Thereby removing residual LNG gas.

이러한, 상기 기체질소공급부(30)에는 상기 액체질소공급조절부(20)에서 공급되는 액체질소를 증기로서 가열하여 가스상태로 질소로 변환시키는 스팀기화기(31)와, 상기 스팀기화기(31)를 통해 가스상태로 변환된 질소를 일정온도와 압력으로 선박에 공급하기 위한 질소가스조절밸브(33)가 설치된다.The gas nitrogen supply unit 30 includes a steam vaporizer 31 for heating liquid nitrogen supplied from the liquid nitrogen supply controller 20 to convert the liquid nitrogen into nitrogen in a gaseous state as vapor, And a nitrogen gas control valve 33 for supplying the nitrogen converted into the gaseous state to the ship at a predetermined temperature and pressure.

상기 스팀기화기(31)는 내부를 관통하는 이송관(60)상에 증기를 분사하여 상기 이송관(60)을 통해 이송되는 액체질소를 가열함으로서 가스상태의 질소로 변환시키게 된다.The steam vaporizer 31 injects steam onto a transfer pipe 60 passing through the inside of the steam vaporizer 31 and converts liquid nitrogen transferred through the transfer pipe 60 into nitrogen in a gaseous state by heating.

이러한, 상기 스팀기화기(31)에는 공급되는 증기량을 조절하여 질소의 온도를 제어하는 스팀제어밸브(32)가 구비된다.The steam vaporizer 31 is provided with a steam control valve 32 for controlling the temperature of nitrogen by controlling the amount of steam supplied.

상기 혼합질소공급부(40)는 상기 기체질소공급부(30) 및 상기 액체질소공급조절부(20)와 각각 이송관(60)에 의해 연결되어 액체질소와 가스상태의 질소를 혼합시켜 전체적인 온도가 -100내지 -120℃인 혼합질소를 LNG선박(80)에 공급하여 파이프의 냉각시험을 하도록 하는 부분이다.The mixed nitrogen supply unit 40 is connected to the gaseous nitrogen supply unit 30 and the liquid nitrogen supply adjustment unit 20 by the transfer pipe 60 to mix the liquid nitrogen and the nitrogen in the gaseous state, 100 < 0 > C to 120 < [deg.] ≫ C to the LNG carrier 80 to perform the cooling test of the pipe.

이러한, 상기 혼합질소공급부(40)는 상기 기체질소공급부(30)에서 공급되는 질소가스와 상기 액체질소공급조절부(20)에서 공급되는 액체질소를 혼합시키는 질소혼합기가 설치된다.The mixed nitrogen supply unit 40 is provided with a nitrogen mixer for mixing the nitrogen gas supplied from the gaseous nitrogen supply unit 30 and the liquid nitrogen supplied from the liquid nitrogen supply regulating unit 20.

도 2에 도시한 바와 같이, 상기 질소혼합기는 복수개의 격판(41)이 내부 상판 및 하판에 각각 형성되며, 마주보는 양측부로 질소가스의 유입구(42) 및 액체질소와 질소가스가 혼합된 혼합질소를 배출하는 배출구(43)가 형성된다.2, the nitrogen mixer has a plurality of diaphragms 41 formed on the inner upper plate and the lower plate, respectively, and the inlet 42 of the nitrogen gas and the mixed nitrogen of the nitrogen gas and the nitrogen gas A discharge port 43 is formed.

그리고, 상기 질소혼합기의 상부 일측에는 내부로 상기 액체질소공급조절부(20)와 연결되어 액체질소를 분사시키는 질소분사노즐(44)이 설치된다.In addition, a nitrogen injection nozzle 44 for injecting liquid nitrogen is provided at one side of the upper portion of the nitrogen mixer in connection with the liquid nitrogen supply regulating portion 20.

따라서, 상기 질소혼합기의 유입구(42)를 통해 유입되는 질소가스는 격판(41)에 부딪히며 속도가 줄어든 상태로 상기 질소분사노즐(44)에서 분사되는 액체질소와 혼합되어 배출구(43)를 통해 이송관(60)으로 이송되어 LNG선박의 파이프 및 탱크로 혼합가스를 공급하게 된다.Therefore, the nitrogen gas flowing through the inlet 42 of the nitrogen mixer is mixed with the liquid nitrogen injected from the nitrogen injection nozzle 44 in a state where the nitrogen gas bumps against the partition plate 41 and is transported through the discharge port 43 And the mixed gas is supplied to the pipe and tank of the LNG carrier.

상기 콘트롤부(50)는 상기 액체질소저장부(10), 상기 액체질소공급조절부(20), 상기 기체질소공급부(30), 상기 혼합질소공급부(40)와 더불어 각각의 이송관(60)에 구비되는 복수개의 밸브에서 압력, 온도, 유량을 감지하여 사용자가 압력, 온도, 유량을 용이하게 조절할 수 있게 하는 부분이다.The control unit 50 is connected to each of the transfer tubes 60 in addition to the liquid nitrogen storage unit 10, the liquid nitrogen supply regulator 20, the gaseous nitrogen supply unit 30, and the mixed nitrogen supply unit 40. [ Temperature, and flow rate in a plurality of valves provided in the main body of the apparatus, thereby allowing the user to easily adjust the pressure, temperature, and flow rate.

즉, 상기 콘트롤부(50)는 상기 액체질소저장부(10)의 압력 및 온도를 감지하여 상기 탱크가압기화기(12)가 상기 저장탱크(11)에 저장되는 액체질소의 압력 및 온도상태를 제어하게 되며, 상기 액체질소공급조절부(20)에서의 유량 및 온도를 감지하여 상기 유량계(21)와 제어밸브(22)를 제어하게 된다.That is, the control unit 50 senses the pressure and the temperature of the liquid nitrogen storage unit 10 and controls the pressure and temperature state of the liquid nitrogen stored in the storage tank 11 by the tank pressurized vaporizer 12 And controls the flowmeter 21 and the control valve 22 by sensing the flow rate and the temperature of the liquid nitrogen supply regulating unit 20.

그리고, 상기 콘트롤부(50)는 상기 기체질소공급부(30)에 유입되는 질소의 압력 및 온도를 감지하면서 상기 스팀기화기(31) 및 스팀제어밸브(32)의 압력 및 온도를 제어하게 된다.The control unit 50 controls the pressures and temperatures of the steam vaporizer 31 and the steam control valve 32 while sensing the pressure and temperature of nitrogen flowing into the gas nitrogen supply unit 30.

더불어, 상기 콘트롤부(50)는 상기 이송관(60)에 구비되는 복수개의 밸브를 조절하여 상기 액체질소공급조절부(20)에서 배출되어 이송되는 액체질소의 흐름을 제어하게 된다.In addition, the control unit 50 controls the flow of liquid nitrogen discharged from the liquid nitrogen supply regulating unit 20 by controlling a plurality of valves provided in the transfer pipe 60.

이와 같이, 구성되는 실시예의 의한 LNG선박 냉각시험 및 치환용 질소공급시스템의 작동을 도 1과 도 2를 참조하여 상세히 설명하면 다음과 같다.The operation of the LNG ship cooling test and the replacement nitrogen supply system according to the embodiment thus constructed will be described in detail with reference to FIGS. 1 and 2. FIG.

먼저, 액체질소가 저장된 탱크로리차량(70)을 각각 상기 액체질소저장부(10)에 연결하여 액체질소를 주입한다.First, the liquid nitrogen is injected into the liquid nitrogen storage unit 10 by connecting the tank truck 70 with liquid nitrogen.

이때, 상기 액체질소저장부(10)의 저장탱크(11)에 상기 탱크로리차량(70)의 펌프를 이용하여 액체질소를 상호 순환시키면서 온도를 상승시키며, 상기 저장탱크(11)에 저장되는 액체질소는 탱크가압기화기(12)에 의해 5내지 10kg/cm2의 압력상태와 -180℃의 온도로 유지시킨다.At this time, the temperature of the liquid nitrogen is increased while the liquid nitrogen is circulated to the storage tank 11 of the liquid nitrogen storage unit 10 by using the pump of the tanker vehicle 70, and the liquid nitrogen stored in the storage tank 11 Is maintained by the tank pressurized vaporizer 12 at a pressure of 5 to 10 kg / cm < 2 > and at a temperature of -180 < 0 > C.

그러면, 상기 액체질소저장부(10)의 저장탱크(11)에 저장된 액체질소는 이송관(60)에 의해 상기 액체질소공급조절부(20)로 이송된다.Then, the liquid nitrogen stored in the storage tank 11 of the liquid nitrogen storage section 10 is transferred to the liquid nitrogen supply regulating section 20 by the transfer pipe 60.

이때, LNG선박(80)건조시의 파이프 및 탱크의 강도를 시험한다면, 상기 액체질소공급조절부(20)의 제어밸브(22)에 의해 상기 액체질소저장부(10)에 저장된 액체질소는 상기 혼합질소공급부(40)로 각각의 이송관(60)을 통해 이송된다.At this time, if the strength of the pipe and the tank at the time of drying the LNG ship 80 is tested, the liquid nitrogen stored in the liquid nitrogen storage section 10 by the control valve 22 of the liquid nitrogen supply regulating section 20 And the mixed nitrogen is fed to the mixed nitrogen supply unit 40 through the respective feed pipes 60.

그리고, LNG선박(80)의 파이프 및 탱크에 잔여하는 폭발성 가스, 산소와 수분등을 제거한다면, 상기 액체질소공급조절부(20)의 제어밸브(22)에 의해 액체질소는 상기 기체질소공급부(30)로 이송관(60)을 통해 이송된다.When the explosive gas remaining in the pipe and the tank of the LNG ship 80 and the oxygen and moisture are removed, the liquid nitrogen is supplied to the gas nitrogen supply unit (not shown) by the control valve 22 of the liquid nitrogen supply regulating unit 20. [ 30 through the transfer pipe 60. [

먼저, 상기 액체질소공급조절부(20)에서 액체질소가 상기 기체질소공급부(30)로 이송되면, 상기 기체질소공급부(30)에 설치된 스팀기화기(31)가 액체질소가 이송되고 있는 이송관(60)에 스팀을 분사하여 내부의 질소를 가열하면서 액체상태에서 가스상태로 변환시킨다.First, when liquid nitrogen is transferred from the liquid nitrogen supply regulating unit 20 to the gaseous nitrogen supplier 30, the steam vaporizer 31 installed in the gaseous nitrogen supplier 30 supplies the liquid nitrogen to the transfer tube 60) to convert the nitrogen in the liquid state into the gas state while heating the nitrogen.

그러면, 상기 스팀기화기(31)를 지나면서 가스상태로 변환된 질소를 상기 질소가스조절밸브(33)를 조절하여 LNG선박(80)으로 일정압력과 속도로 공급하여 LNG선박(80)의 파이프 및 탱크에 잔여하는 폭발성 잔여가스를 제거하게 된다.Then, the nitrogen gas that has been converted into the gas state through the steam vaporizer 31 is supplied to the LNG ship 80 at a predetermined pressure and speed by regulating the nitrogen gas control valve 33, And the remaining explosive residual gas in the tank is removed.

한편으로, 상기 액체질소공급조절부(20)에서 액체질소가 상기 혼합질소공급부(40)로 공급되면, 상기 혼합질소공급부(40)의 질소혼합기로 상기 스팀기화기(31)에 의해 가스상태로 변환된 질소와 혼합되어 -100내지 -120℃로 가온된 혼합질소를 LNG선박(80)으로 공급하여 LNG선박(80) 파이프 및 탱크의 강도를 시험하게 된다.Meanwhile, when liquid nitrogen is supplied from the liquid nitrogen supply regulating unit 20 to the mixed nitrogen supply unit 40, the gas is converted into a gas state by the steam vaporizer 31 with a nitrogen mixer of the mixed nitrogen supply unit 40 And mixed nitrogen heated to -100 to -120 ° C is supplied to the LNG carrier 80 to test the strength of the LNG carrier 80 pipes and tanks.

또한, 상기 액체질소저장부(10)에 저장된 -180℃ 상태의 액체질소를 상기 액체 질소공급조절부(20)에서 바로 LNG선박(80)으로 공급하여 LNG선박(80) 파이프 및 탱크의 강도를 시험할 수도 있다.The liquid nitrogen at -180 ° C stored in the liquid nitrogen storage section 10 is directly supplied to the LNG ship 80 from the liquid nitrogen supply regulating section 20 to adjust the strength of the pipe and tank of the LNG ship 80 You can also test.

상술한 바와 같은 본 발명의 LNG선박 냉각시험 및 치환용 질소공급시스템은, LNG선박에 가스질소와 가온된 혼합질소, 가온된 액체질소를 각각 공급함으로서 LNG선박의 파이프 및 탱크의 안정적인 강도시험과 잔여폭발성 가스제거를 가능하게 하는 효과를 제공한다.As described above, the LNG ship cooling test and replacement nitrogen supply system of the present invention can supply the LNG ship with gaseous nitrogen and warmed mixed nitrogen and warmed liquid nitrogen, respectively, so that the stable strength test of the pipe and the tank of the LNG ship, Thereby providing an effect of enabling explosive gas removal.

이상과 같이, 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술 사상과 아래에 기재될 특허청구범위의 균등 범위내에서 다양한 수정 및 변형이 가능함은 물론이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

Claims (8)

탱크로리차량에서 액체상태의 질소를 공급받아 일정압력 및 온도상태로 저장하는 액체질소저장부와;A liquid nitrogen storage part for storing the nitrogen in the liquid state in the tank truck at a predetermined pressure and temperature; 상기 액체질소저장부와 이송관으로 연결되어 상기 액체질소저장부에서 배출되는 액체질소량을 파악하여 조절하는 액체질소공급조절부와;A liquid nitrogen supply regulating unit connected to the liquid nitrogen storage unit through a transfer pipe to detect and regulate an amount of liquid nitrogen discharged from the liquid nitrogen storage unit; 상기 액체질소공급조절부와 이송관으로 연결되어 배출공급되는 액체질소를 가열하여 가스상태의 질소로 변환하여 선박의 파이프 및 탱크로 공급하는 기체질소공급부와;A gas nitrogen supply unit connected to the liquid nitrogen supply regulating unit through a transfer pipe to heat the liquid nitrogen discharged and supplied to convert the gas into nitrogen in a gaseous state and supply the gas to a pipe and a tank of the ship; 상기 기체질소공급부 및 상기 액체질소공급조절부와 이송관으로 연결된 상태에서 액체질소와 가스상태의 질소를 혼합하여 선박의 파이프 및 탱크로 공급하는 혼합질소공급부; 및,A mixed nitrogen supply unit for mixing liquid nitrogen and gaseous nitrogen with the gaseous nitrogen supply unit and the liquid nitrogen supply regulating unit connected to each other through a transfer pipe and supplying the mixed gas to pipes and tanks of the ship; And 상기 액체질소저장부, 상기 액체질소공급조절부, 상기 기체질소공급부, 상기 혼합질소공급부와 더불어 각각의 이송관에 구비되는 복수개의 밸브에서 압력, 온도, 유량을 감지하여 사용자가 각 부분의 압력, 온도, 유량을 조절할 수 있게 하는 콘트롤부를 포함하는 것을 특징으로 하는 LNG선박 냉각시험 및 치환용 질소공급시스템.The pressure, the temperature, and the flow rate of the plurality of valves provided in the respective transfer tubes in addition to the liquid nitrogen storage section, the liquid nitrogen supply control section, the gaseous nitrogen supply section, and the mixed nitrogen supply section, Temperature, and flow rate of the LNG carrier, wherein the LNG carrier cooling test and the replacement nitrogen supply system are provided. 제 1항에 있어서,The method according to claim 1, 상기 액체질소저장부는The liquid nitrogen storage part 상기 탱크로리차량에서 액체질소가 순환 유입충전되는 저장탱크와,A storage tank in which liquid nitrogen is circulated and charged in the tanker vehicle, 상기 탱크로리차량에서 상기 저장탱크 내부로 유입되는 액체질소를 5내지 10Kg/cm2의 압력상태와 -180℃의 온도로 저장시키는 탱크가압기화기를 포함하는 것을 특징으로 하는 LNG선박 냉각시험 및 치환용 질소공급시스템.And a tank pressurized vaporizer for storing liquid nitrogen introduced into said storage tank from said tanker vehicle at a pressure of 5 to 10 kg / cm < 2 > and a temperature of -180 DEG C. [ Supply system. 제 1항에 있어서,The method according to claim 1, 상기 액체질소공급조절부는The liquid nitrogen supply regulating unit 상기 이송관을 통해 상기 액체질소저장부에서 배출이송되는 액체질소의 이송량을 감지하는 유량계와,A flowmeter for sensing a transfer amount of liquid nitrogen discharged from the liquid nitrogen storage unit through the transfer pipe; 상기 이송관을 통해 상기 액체질소저장부에서 이송되는 액체질소의 이송량을 제어하는 제어밸브를 포함하는 것을 특징으로 하는 LNG선박 냉각시험 및 치환용 질소공급시스템.And a control valve for controlling the amount of liquid nitrogen transferred from the liquid nitrogen storage unit through the transfer pipe. 제 1항에 있어서,The method according to claim 1, 상기 기체질소공급부는The gaseous nitrogen feeder 상기 액체질소공급조절부에서 공급되는 액체질소를 스팀으로서 가열하여 가스상태의 질소로 변환시키는 스팀기화기와,A steam vaporizer for heating the liquid nitrogen supplied from the liquid nitrogen supply regulator to convert the liquid nitrogen into gaseous nitrogen, 상기 스팀기화기를 통해 가스상태로 변환된 질소를 일정온도와 압력으로 선박에 공급하기 위한 질소가스조절밸브를 포함하는 것을 특징으로 하는 LNG선박 냉각시험 및 치환용 질소공급시스템.And a nitrogen gas regulating valve for supplying the nitrogen converted into the gaseous state to the ship at a predetermined temperature and pressure through the steam vaporizer. 제 4항에 있어서,5. The method of claim 4, 상기 스팀기화기에는 공급되는 증기량을 조절하여 액체질소의 온도를 제어하는 스팀제어밸브가 설치된 것을 특징으로 하는 LNG선박 냉각시험 및 치환용 질소공급시스템.Wherein the steam vaporizer is provided with a steam control valve for controlling the temperature of liquid nitrogen by controlling the amount of steam supplied to the steam vaporizer. 제 1항에 있어서,The method according to claim 1, 상기 혼합질소공급부에는 상기 기체질소공급부에서 공급되는 질소가스와 상기 액체질소공급조절부에서 공급되는 액체질소를 혼합시키는 질소혼합기가 설치된것을 특징으로 하는 LNG선박 냉각시험 및 치환용 질소공급시스템.Wherein the mixed nitrogen supply unit is provided with a nitrogen mixer for mixing nitrogen gas supplied from the gaseous nitrogen supply unit and liquid nitrogen supplied from the liquid nitrogen supply regulating unit. 제 6항에 있어서,The method according to claim 6, 상기 질소혼합기는 복수개의 격판이 내부 상판 및 하판에 각각 형성되며, 마주보는 양측부로 질소가스의 유입구 및 액체질소와 질소가스가 혼합된 혼합질소를 배출하는 배출구가 구비되고, 상부 일측에는 내부로 상기 액체질소공급조절부와 연결되어 액체질소를 분사시키는 질소분사노즐이 설치된 것을 특징으로 하는 LNG선박 냉각시험 및 치환용 질소공급시스템.The nitrogen mixer includes a plurality of diaphragms formed on the inner top plate and the bottom plate, respectively, and an outlet for discharging nitrogen nitrogen mixed with the inlet of the nitrogen gas and the nitrogen gas mixed with the nitrogen gas by the opposite side portions, And a nitrogen injection nozzle connected to the liquid nitrogen supply regulating unit for injecting liquid nitrogen is installed in the LNG carrier. 제 1항 또는 제 6항에 있어서,7. The method according to claim 1 or 6, 상기 혼합질소공급부는 -100내지 -120℃의 혼합질소를 생생하여 LNG선박의 파 이프 및 탱크에 공급하는 것을 특징으로 하는 LNG선박 냉각시험 및 치환용 질소공급시스템.Wherein the mixed nitrogen supply unit supplies mixed nitrogen at a temperature of -100 to -120 DEG C to the piping and tank of the LNG carrier and supplies the nitrogen to the LNG carrier.
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KR101245641B1 (en) * 2011-05-04 2013-03-20 대우조선해양 주식회사 Pump cooling method of liquifyed natural gas supply system
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KR101338006B1 (en) * 2013-10-15 2013-12-06 동덕산업가스(주) Nitrogen temperature controlling apparatus for cryogenic test
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KR101586127B1 (en) 2013-12-30 2016-01-15 현대중공업 주식회사 A Treatment System Liquefied Gas
KR101610475B1 (en) 2014-06-18 2016-04-08 현대중공업 주식회사 A Maintenance System and Method of Tank
WO2016048162A1 (en) * 2014-09-23 2016-03-31 Naturgass Möre As Method and apparatus for treatment of pressure vessels
CN104763875A (en) * 2014-11-29 2015-07-08 山东泰山钢铁集团有限公司 Liquid unloading method for liquefied natural gas or coal gas
CN111306440B (en) * 2018-12-12 2022-02-01 张家港中集圣达因低温装备有限公司 Liquid discharge metering device
CN111306440A (en) * 2018-12-12 2020-06-19 张家港中集圣达因低温装备有限公司 Liquid discharge metering device
CN110057658A (en) * 2019-04-22 2019-07-26 龙源 The cooling device and method of half gas low temperature high-pressure metal pipe explosion bulge test of heavy caliber
KR20210028761A (en) 2019-09-04 2021-03-15 한라아이엠에스 주식회사 Gas safety system applied to fuel propulsion vessel
KR20210120204A (en) * 2020-03-26 2021-10-07 송병근 System for processing liquified gas
KR102315406B1 (en) * 2020-03-26 2021-10-21 송병근 System for processing liquified gas
KR20220008467A (en) * 2020-07-14 2022-01-21 (주)마이텍 LNG Vaporizer Pressure Test System
KR102403689B1 (en) * 2020-07-14 2022-05-30 (주)마이텍 LNG Vaporizer Pressure Test System
KR20220095284A (en) 2020-12-29 2022-07-07 한라아이엠에스 주식회사 Smart Sensors System for Gas Monitoring Systems in Ships

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