KR20220130392A - LNG supply system transfer process control method - Google Patents

LNG supply system transfer process control method Download PDF

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KR20220130392A
KR20220130392A KR1020210035217A KR20210035217A KR20220130392A KR 20220130392 A KR20220130392 A KR 20220130392A KR 1020210035217 A KR1020210035217 A KR 1020210035217A KR 20210035217 A KR20210035217 A KR 20210035217A KR 20220130392 A KR20220130392 A KR 20220130392A
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South Korea
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lng
storage tank
pressure storage
pump
lng pump
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KR1020210035217A
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Korean (ko)
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KR102456937B1 (en
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나광호
최소담
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주식회사 한국가스기술공사
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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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/002—Automated filling apparatus
    • F17C5/007—Automated filling apparatus for individual gas tanks or containers, e.g. in vehicles
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/041—Methods for emptying or filling vessel by vessel
    • F17C2227/042—Methods for emptying or filling vessel by vessel with change-over from one vessel to another
    • 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
    • F17C2250/03—Control means
    • F17C2250/032—Control means using computers
    • 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
    • F17C2270/05—Applications for industrial use
    • F17C2270/0581—Power plants

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Control Of Conveyors (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention relates to a transfer process controlling method of an LNG supplying system. More specifically, as a process of transferring LNG from a low pressure storage tank to a high pressure storage tank, the transfer process proceeds only when a preset operating condition of an LNG pump is met. After an LNG pump is operated, when a stop condition is satisfied or corresponding to the same, LNG supply is automatically stopped. Therefore, it is possible to implement automation of the LNG transfer process and to take prompt measures when an abnormality occurs. The transfer process controlling method of the LNG supplying system comprises: a first selection step (S100); a second selection step (S200); a check step (S300); a first transfer step (S400); a second transfer step (S500); and a completion step (S600).

Description

LNG 공급시스템의 이송공정 제어방법{LNG supply system transfer process control method}LNG supply system transfer process control method {LNG supply system transfer process control method}

본 발명은 LNG를 저압 저장탱크에서 고압 저장탱크로 이송하는 과정으로써, 이를 위한 이송공정의 제어방법에 관한 것이다.The present invention relates to a process of transporting LNG from a low-pressure storage tank to a high-pressure storage tank, and to a method for controlling the transport process therefor.

LNG 공급시스템은 LNG를 기화기를 통해 NG로 변환하여 발전소에 일정하게 공급 할 수 있는 공급설비로, LNG생산기지로부터 탱크로리 또는 탱크 컨테이너로 LNG를 수송하여 저장탱크에 저장하고, 이송하여 기화기로 기화된 NG를 공급설비(Heater, Governor, 계량기 등)를 거쳐 사용압력으로 천연가스 혼소 발전기로 연료를 공급하며, 공급설비는 LNG저장탱크, 펌프, 기화기, 히터 및 발전기 등으로 구성되어 있다.The LNG supply system is a supply facility that can convert LNG into NG through a vaporizer and supply it to power plants in a constant manner. The NG is supplied to the natural gas co-firing generator at working pressure through the supply facilities (heater, governor, meter, etc.), and the supply facility is composed of an LNG storage tank, pump, vaporizer, heater and generator.

이러한 LNG 공급설비의 감시를 위해서는 다양한 운전시스템이 구성되어 있어야 하고, 주 운전자 인터페이스로 설비의 감시 및 각종 운전 환경설정이 가능해야만 한다.In order to monitor such LNG supply facilities, various operating systems must be configured, and monitoring of facilities and various operating environment settings must be possible through the main operator interface.

LNG충전, LNG 이송, NG공급, BOG 사용 4단계 공정으로 이루어져 있는 LNG 공급시스템에서, 특히 LNG 이송공정에 대해 설명하면,In the LNG supply system, which consists of four stages of LNG charging, LNG transport, NG supply, and BOG use, especially the LNG transport process,

LNG 이송공정은 LNG를 저압 저장탱크에서 고압 저장탱크로 이송하는 과정이며, 발전기의 사용량을 고려하여 고압 저장탱크의 Level을 매일 체크하여 사전설정수준으로 유지하는 것을 권장하고, 자동운전으로 설정된 경우 고압 저장탱크의 Level이 사전설정수준 이하일 때 펌프를 통해, 저압 저장탱크에서 고압 저장탱크로 LNG를 이송하게 되는 것이다.The LNG transfer process is the process of transferring LNG from a low-pressure storage tank to a high-pressure storage tank, and it is recommended to check the level of the high-pressure storage tank daily and maintain it at a preset level in consideration of the amount of generator usage. When the level of the storage tank is below the preset level, LNG is transferred from the low-pressure storage tank to the high-pressure storage tank through the pump.

이에, LNG를 저압 저장탱크에서 고압 저장탱크로의 이송공정을 자동운전으로 용이하게 손쉽게 진행할 수 있는 제어방법에 대한 기술개발이 요구되고 있는 실정이다.Accordingly, there is a need to develop a technology for a control method that can easily and easily carry out the process of transferring LNG from a low-pressure storage tank to a high-pressure storage tank by automatic operation.

대한민국 등록특허공보 10-2002951호(2019.07.17.등록)Republic of Korea Patent Publication No. 10-2002951 (registered on July 17, 2019)

본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 LNG를 저압 저장탱크에서 고압 저장탱크로 LNG펌프 등을 이용하여 옮기는 과정으로서, LNG를 사용하는 발전기의 사용량을 고려하여 고압 저장탱크의 수위(Level)을 일정수준으로 유지하면서 자동운전으로 진행될 수 있도록 함으로서, LNG 이송공정의 자동화 구현 및 정지조건에 해당될시에는 구동이 자동으로 중단되어 안전사고가 발생되지 않고 신속한 조치가 가능해질 수 있도록 하는 LNG 공급시스템의 이송공정 제어방법을 제공하는데 있다.The present invention is to solve the above problems, and an object of the present invention is to move LNG from a low-pressure storage tank to a high-pressure storage tank by using an LNG pump, etc. Considering the amount of generator using LNG, high-pressure storage By enabling automatic operation while maintaining the level of the tank at a certain level, the operation is automatically stopped when the LNG transport process is automated and the stop condition is met, so that no safety accident occurs and prompt action can be taken An object of the present invention is to provide a method for controlling the transport process of an LNG supply system that can be

본 발명의 다른 목적 및 장점들은 하기에 설명될 것이며, 본 발명의 실시예에 의해 알게 될 것이다. 또한, 본 발명의 목적 및 장점들은 특허청구범위에 나타낸 수단 및 조합에 의해 실현될 수 있다.Other objects and advantages of the present invention will be set forth below and will be learned by way of example of the present invention. Further, the objects and advantages of the present invention may be realized by means and combinations indicated in the claims.

본 발명은 상기와 같은 문제점을 해결하기 위한 수단으로서,The present invention is a means for solving the above problems,

LNG탱크로부터 가스발전기로 NG를 공급하기 위한 공정 중, LNG를 LNG 저압 저장탱크(11)에서 LNG 고압 저장탱크(12)로 옮기는 이송공정의 제어방법으로,In the process for supplying NG from the LNG tank to the gas generator, it is a control method of the transfer process of moving LNG from the LNG low-pressure storage tank 11 to the LNG high-pressure storage tank 12,

LNG 펌프(20)가 자동운전으로 선택되는 단계(S100);The LNG pump 20 is selected for automatic operation (S100);

복수개의 LNG 펌프(20) 중 구동될 LNG 펌프(20)가 선택되는 단계(S200);selecting an LNG pump 20 to be driven from among the plurality of LNG pumps 20 (S200);

선택된 상기 LNG 펌프(20)의 자동운전을 위한 시작조건이 체크되는 단계(S300);Checking the starting conditions for the automatic operation of the selected LNG pump 20 (S300);

상기 LNG 펌프(20)를 통해 저압 저장탱크(11)에서 LNG가 이송되어 저장되는 고압 저장탱크(12) 내부의 압력이 체크되는 단계(S400);checking the pressure inside the high-pressure storage tank 12 in which LNG is transported and stored from the low-pressure storage tank 11 through the LNG pump 20 (S400);

상기 LNG 펌프(20)가 구동되어, 저압 저장탱크(11)에서 고압 저장탱크(12)로 LNG가 이송되는 단계(S500);The LNG pump 20 is driven to transport LNG from the low-pressure storage tank 11 to the high-pressure storage tank 12 (S500);

상기 LNG 펌프(20)의 정지조건이 만족될 시, LNG 펌프(20)의 구동이 멈추며 이송공정이 완료되는 단계(S600);When the stopping condition of the LNG pump 20 is satisfied, the operation of the LNG pump 20 is stopped and the transfer process is completed (S600);

를 포함하여 이루어지는 것을 특징으로 한다.It is characterized in that it comprises a.

이상에서 살펴본 바와 같이, 본 발명은 LNG를 저압 저장탱크에서 고압 저장탱크로의 이송공정을 자동운전으로 용이하게 손쉽게 진행할 수 있는 효과가 있다.As described above, the present invention has the effect of easily and easily carrying out the process of transferring LNG from the low-pressure storage tank to the high-pressure storage tank through automatic operation.

또한, 본 발명은 LNG 이송공정의 자동화가 가능한 효과가 있다.In addition, the present invention has the effect of enabling the automation of the LNG transport process.

또한, 본 발명은 이송공정의 자동운전시에는 사전에 운전조건에 해당될 시에만 운전되도록 하며, 정지조건에 해당될 시에는 자동정지되도록 하여, 안전사고 방지 및 LNG 공급시스템의 이송공정에 발생된 문제에 대해 신속한 대처가 가능한 효과가 있다.In addition, the present invention allows the automatic operation of the transfer process to be operated only when the operating conditions are met in advance, and to automatically stop when the stop conditions are met, thereby preventing safety accidents and preventing accidents occurring in the transfer process of the LNG supply system. It has the effect of being able to respond quickly to problems.

도 1은 LNG 위성기지 공급체계를 나타낸 공정도.
도 2 및 도 3은 LNG 펌프 조작부를 나타낸 도면.
도 4는 본 발명에 따른 LNG 위성기지 운영시스템을 나타낸 도면.
도 5는 도 4에서 LNG 펌프 작동관련 부분을 나타낸 도면.
도 6은 도 5에서 복수개의 LNG 펌프 중 하나를 선택하는 모습을 나타낸 도면.
도 7은 도 6에서 LNG 펌프의 자동운전을 선택하는 모습을 나타낸 도면.
도 8은 본 발명에 따른 LNG 공급시스템의 이송공정 제어방법을 나타낸 도면.1 is a process diagram showing an LNG satellite base supply system.
2 and 3 are views showing an LNG pump operation unit.
4 is a view showing an LNG satellite base operating system according to the present invention.
5 is a view showing an operation related part of the LNG pump in FIG. 4 .
FIG. 6 is a view showing a state in which one of a plurality of LNG pumps is selected in FIG. 5 .
7 is a view showing a state in which automatic operation of the LNG pump is selected in FIG. 6 .
8 is a view showing a method for controlling a transport process of an LNG supply system according to the present invention.

본 발명의 여러 실시예들을 상세히 설명하기 전에, 다음의 상세한 설명에 기재되거나 도면에 도시된 구성요소들의 구성 및 배열들의 상세로 그 응용이 제한되는 것이 아니라는 것을 알 수 있을 것이다. 본 발명은 다른 실시예들로 구현되고 실시될 수 있고 다양한 방법으로 수행될 수 있다. 또, 장치 또는 요소 방향(예를 들어 "전(front)", "후(back)", "위(up)", "아래(down)", "상(top)", "하(bottom)", "좌(left)", "우(right)", "횡(lateral)")등과 같은 용어들에 관하여 본원에 사용된 표현 및 술어는 단지 본 발명의 설명을 단순화하기 위해 사용되고, 관련된 장치 또는 요소가 단순히 특정 방향을 가져야 함을 나타내거나 의미하지 않는다는 것을 알 수 있을 것이다. 또한, "제 1(first)", "제 2(second)"와 같은 용어는 설명을 위해 본원 및 첨부 청구항들에 사용되고 상대적인 중요성 또는 취지를 나타내거나 의미하는 것으로 의도하지 않는다.Before describing various embodiments of the present invention in detail, it will be understood that the application is not limited to the details of the construction and arrangement of components described in the following detailed description or shown in the drawings. The invention is capable of being embodied and practiced in other embodiments and of being carried out in various ways. Also, device or element orientation (eg, “front”, “back”, “up”, “down”, “top”, “bottom”) The expressions and predicates used herein with respect to terms such as ", "left", "right", "lateral", etc. are used merely to simplify the description of the invention, and the associated apparatus Or it will be appreciated that it does not simply indicate or imply that an element must have a particular orientation. Also, terms such as “first” and “second” are used in this application and the appended claims for the purpose of description and are not intended to indicate or imply relative importance or spirit.

본 발명은 상기의 목적을 달성하기 위해 아래의 특징으로 갖는다.In order to achieve the above object, the present invention has the following features.

이하 첨부된 도면을 참조로 본 발명의 바람직한 실시예를 상세히 설명하도록 한다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 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.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as 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 변형 예들이 있을 수 있음을 이해하여야 한다.Therefore, the configuration shown in the embodiments and drawings described in the present specification is merely the most preferred embodiment of the present invention and does not represent all of the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.

이하, 도 1 내지 도 8을 참조하여 본 발명의 바람직한 실시예에 따른 LNG 공급시스템의 이송공정 제어방법을 상세히 설명하도록 한다.Hereinafter, a method for controlling a transport process of an LNG supply system according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 8 .

본 발명의 LNG 공급시스템의 이송공정 제어방법은, LNG탱크로부터 가스발전기로 NG(natural gas)를 공급하기 위한 공정 중, LNG(liquefied natural gas)를 LNG 저압 저장탱크(11)에서 LNG 고압 저장탱크(12)로 옮기는 이송공정의 제어방법으로서, 하기와 같은 공정순서를 포함한다.The method for controlling the transport process of an LNG supply system of the present invention is a process for supplying NG (natural gas) from an LNG tank to a gas generator. As a control method of the transfer process moving to (12), the following process sequence is included.

1. LNG 펌프(20)가 자동운전으로 선택되는 단계(S100): LNG 이송을 위해 설치되는 제어패널(100)(ex: P-M Panel, Control Panel)에서 제 1제어레버(110)가, 수동운전과 자동운전 중 '자동운전'으로 선택되는 단계(S110)와, 동일한 제어패널(100)에서 제 2제어레버(120)가, 인버터(INV), OFF, 바이패스(BY) 중 '인버터'로 선택되는 단계(S120)이다.1. Step in which the LNG pump 20 is selected for automatic operation (S100): the first control lever 110 in the control panel 100 (ex: P-M Panel, Control Panel) installed for LNG transport is manually operated In the step (S110) of selecting 'automatic operation' during and automatic operation, the second control lever 120 in the same control panel 100 switches to 'inverter' among inverter (INV), OFF, and bypass (BY). It is a selected step (S120).

상기 LNG 이송공정의 경우, 수동으로 선택할 시 모든 펌프와 각종 ON/OFF 밸브(AOV)등을 수동으로 조작해야하기에, LNG 펌프(20)의 정지검검, 고장수리, 유지보수 등 특별한 상황이 아닐 경우를 제외하고는 자동모드가 사용된다.In the case of the LNG transport process, when manually selecting, all pumps and various ON/OFF valves (AOVs) must be manually operated, so it is not a special situation such as stop inspection, troubleshooting, and maintenance of the LNG pump 20. Auto mode is used except in cases where

이러한 LNG 이송공정 진행전에 확인해야 하는 사항은 하기와 같다.The items to be checked before proceeding with the LNG transfer process are as follows.

첫째, 고압 저장탱크(12)의 수위체크로서, 체크권장 주기는 정압기의 공급유량이 200Nm3/h인 경우를 기준이므로, 사용시마다 공급유량이 상이할 수 있기에, 그때의 사전설정된 상황에 맞게 주기를 정하여 확인해야 함은 당연하다.First, as the water level check of the high-pressure storage tank 12, the recommended check cycle is based on the case where the supply flow rate of the static pressure machine is 200 Nm 3 /h, so the supply flow rate may be different each time it is used, so the cycle according to the preset situation at that time It is of course necessary to determine and check

둘째, 후술될 LNG 펌프(20)(LNG Pump)가 정지 조건일 경우, S100단계에서 자동으로 설정되었더라도 자동이송 진행하지 않기 때문에, LNG 이송이 이루어지지 않을 경우 LNG 펌프(20)가 하기의 정지조건에 해당되는지를 확인하여 해소되도록 해야한다.Second, when the LNG pump 20 (LNG Pump), which will be described later, is in a stop condition, automatic transfer does not proceed even if it is automatically set in step S100. It should be checked to see if it is applicable.

셋째, 이러한 LNG 이송공정은 LNG 펌프(20)가 이미 예냉이 된 조건에서 진행하는 것이므로, 구동하기 위해 선택된 LNG 펌프(20)의 예냉이 안 된 상태라면, LNG 펌프(20)의 예냉(수동) 절차를 진행 후, S100단계의 자동절차를 진행해야 한다.Third, since this LNG transfer process is performed under the condition that the LNG pump 20 has already been pre-cooled, if the LNG pump 20 selected for operation is not pre-cooled, the LNG pump 20 is pre-cooled (manually). After the procedure, the automatic procedure of step S100 should be performed.

2. 복수개의 LNG 펌프(20) 중 구동될 LNG 펌프(20)가 선택되는 단계(S200): LNG 위성기지 운영시스템(200)의 디스플레이창(HMI, SCADA S/W를 이용한 HMI(Human Machine Interface)로 운전시스템이 구성되어 있으며. SCADA S/W는 주 운전자 인터페이스로 설비의 감시 및 각종 운전 환경설정이 가능하다.)에서, 복수개의 LNG 펌프(20) 중 하나가 선택되는 단계(S210)와, LNG 위성기지 운영시스템(200)의 디스플레이 창에서, LNG 이송방법으로 '자동'이 선택되는 단계(S220)로 이루어진다.2. Step of selecting the LNG pump 20 to be driven among the plurality of LNG pumps 20 (S200): Human Machine Interface (HMI) using the display window (HMI, SCADA S/W) of the LNG satellite base operating system 200 ), and the SCADA S/W is the main operator interface, enabling monitoring of facilities and setting of various operating environments), in which one of the plurality of LNG pumps 20 is selected (S210) and , in the display window of the LNG satellite base operating system 200, 'automatic' is selected as the LNG transport method (S220).

우선적으로, LNG 위성기지 운영시스템(200)의 디스플레이의 전체화면에서 이송공정에 해당되는 부분을 설명하면,First, when explaining the part corresponding to the transport process on the full screen of the display of the LNG satellite base operating system 200,

LNG 탱크와 연결되어 LNG가 공급되어 있는 저압 저장탱크(11) 및 저압 저장탱크(11)로부터 LNG가 이송되어질 고압 저장탱크(12), 상기 저압 저장탱크(11)와 고압 저장탱크(12) 사이에 복수개가 위치되어 LNG를 이송시키는 펌프로 사용되는 복수개의 LNG 펌프(20), 상기 저압 저장탱크(11)에 배출구 측에 설치되어 LNG를 복수개의 LNG 펌프(20)측으로 최초 이송시키는 개폐밸브(V1), 저압 저장탱크(11)로부터 이송된 LNG가 유출을 제어하기 위해, 복수개의 LNG 펌프(20) 각각에 설치되는 인입밸브(V2), 상기 LNG 펌프(20) 각각에 설치되되, LNG 펌프(20)가 정지조건이거나 또는 자동운전 조건에 해당되지 않을시, LNG를 저압 저장탱크(11)로 리턴시키도록, 저압 저장탱크(11)와 복수개의 LNG 펌프(20) 사이의 바이패스 관로(30)에 설치되는 리턴밸브(24), 상기 복수개의 LNG 펌프(20)와 연결되어 LNG를 공급받기 위해 고압 저장탱크(12)의 상, 하단측에 개폐선택가능하게 설치되는 복수개의 공급밸브(V3(13, 14))로 구성된다.Between the low pressure storage tank 11 and the low pressure storage tank 11 to which LNG is to be transferred from the low pressure storage tank 11 and the low pressure storage tank 11 connected to the LNG tank, and between the low pressure storage tank 11 and the high pressure storage tank 12 a plurality of LNG pumps 20, which are located in the V1), in order to control the outflow of LNG transferred from the low pressure storage tank 11, an inlet valve V2 installed in each of the plurality of LNG pumps 20, and installed in each of the LNG pumps 20, the LNG pump Bypass pipe (20) between the low pressure storage tank (11) and the plurality of LNG pumps (20) to return the LNG to the low pressure storage tank (11) when the stop condition or the automatic operation condition is not met A return valve 24 installed in 30), a plurality of supply valves ( V3 (13, 14)).

상기 S210단계는 LNG 위성기지 운영시스템(200)의 디스플레이의 전체화면(전체도)에서 복수개의 펌프(P-201 or P-202) 하단의 모터(Motor) 부분을 클릭하면, 펌프 조작창(210)이 POP UP되며, 이에, 이러한 펌프 조작창(210) 상부에서, 사용하고자 하는 해당펌프(P-201(선택운전) 또는 P-202(선택운전))의 선택운전을 클릭하여 2개 중 하나의 LNG 펌프(20)가 구동용으로 사용될 수 있도록 제어되는 단계이다.In step S210, when a motor part at the bottom of a plurality of pumps (P-201 or P-202) is clicked on the full screen (overall view) of the display of the LNG satellite base operating system 200, the pump operation window 210 ) is POP UP, and therefore, at the upper part of the pump operation window 210, click the selective operation of the corresponding pump (P-201 (selective operation) or P-202 (selective operation)) to use one of the two It is a step in which the LNG pump 20 is controlled so that it can be used for driving.

상기 S220단계는 LNG 위성기지 운영시스템(200)의 디스플레이(HMI) 창에서, 좌측의 LNG 이송방법이 나타나 있는 이송방법 조작창(220)(AUTO/MAN SEL창)에, LNG 이송 자동 Button을 선택하면, 선택된 LNG 펌프(20)는 펌프 운전조건 충족시 자동운전을 시작하도록 한 것이다. 물론, 가급적이면 선택된 LNG 펌프(20)가 충분히 Cooldown된 LNG 펌프(20)인지 확인한 후에 자동운전을 시작하는 것이 유리함은 당연할 것이다.In step S220, in the display (HMI) window of the LNG satellite base operating system 200, the LNG transfer automatic button is selected in the transfer method operation window 220 (AUTO/MAN SEL window) showing the LNG transfer method on the left. Then, the selected LNG pump 20 starts automatic operation when the pump operation conditions are satisfied. Of course, it is of course advantageous to start the automatic operation after confirming that the selected LNG pump 20 is the LNG pump 20 that has been sufficiently cooled down.

이러한, LNG 이송공정의 자동운전 시작조건은 고압 저장탱크(12)(TK-102)의 수위가(LT-101B Level) HighHigh값 이하, 저압 저장탱크(11)(TK-101)의 수위(LT-101A Level)가 LowLow값 이상, 개폐밸브(V1)(ESV-101A)가 OPEN 되어있을때 진행된다.The automatic operation start condition of the LNG transfer process is that the water level (LT-101B Level) in the high-pressure storage tank 12 (TK-102) is below the HighHigh value, and the water level (LT) in the low-pressure storage tank 11 (TK-101). -101A Level) is above the LowLow value, and the on/off valve (V1) (ESV-101A) is OPEN.

물론, 구동되도록 선택된 LNG 펌프(20)의 인입밸브(V2)(AOV-201 or AOV-202)와 리턴밸브(24)(BOG return Valve, AOV-203)도 OPEN 된다.Of course, the inlet valve V2 (AOV-201 or AOV-202) and the return valve 24 (BOG return Valve, AOV-203) of the LNG pump 20 selected to be driven are also opened.

3. 선택된 상기 LNG 펌프(20)의 자동운전을 위한 시작조건이 체크되는 단계(S300): LNG 펌프(20)의 자동운전이 되기 위한 시작조건이 구비되어 있는지 사전에 확인하는 단계로서,3. Step of checking the start conditions for automatic operation of the selected LNG pump 20 (S300): A step of checking in advance whether the start conditions for automatic operation of the LNG pump 20 are provided,

첫째, 상기 LNG 펌프(20)의 주입구에 설치된 온도센서(40)를 통해, 구동선택된 LNG 펌프(20)의 LNG 주입구 온도가 -140℃ 이하인지 체크되는 단계(S310); 둘째, 상기 고압 저장탱크(12)에 설치되는 계량기를 통해, 내부 수위가 40%이하인지 체크되는 단계(S320); 셋째, 상기 LNG 펌프(20)에 설치되는 수위센서를 통해, LNG 펌프(20) 내부의 LNG 수위가 80% 이상인지 체크되는 단계(S330); 넷째, 상기 저압 저장탱크(11)의 개폐밸브(V1), LNG 펌프(20)의 인입밸브(V2), 고압 저장탱크(12)의 공급밸브(V3) 중 어느 하나의 밸브가 ON되었는지 확인되는 단계(S340);로 이루어지며, 이러한 상기 S310 ~ S340단계가 모두 만족되어야 다음 S400단계로의 진행이 가능하며, S310 ~ S340의 확인순서는 사용자의 실시예에 따라 다양하게 변경될 수 있음이다.First, through the temperature sensor 40 installed at the inlet of the LNG pump 20, the step of checking whether the temperature of the LNG inlet of the LNG pump 20 selected to be driven is -140° C. or less (S310); Second, through the meter installed in the high-pressure storage tank 12, the step of checking whether the internal water level is 40% or less (S320); Third, a step of checking whether the LNG water level inside the LNG pump 20 is 80% or more through a water level sensor installed in the LNG pump 20 (S330); Fourth, it is checked whether any one of the on/off valve V1 of the low pressure storage tank 11, the inlet valve V2 of the LNG pump 20, and the supply valve V3 of the high pressure storage tank 12 is turned on Step (S340); is made, and it is possible to proceed to the next step S400 only when all of these steps S310 to S340 are satisfied, and the confirmation order of S310 to S340 may be variously changed according to the embodiment of the user.

더욱 자세히 설명하면,In more detail,

구동되기 위해 선택된 LNG 펌프(20)가 완전히 Cooldown되고, LNG 펌프(20)의 수위(LNG LEVEL(제 1LNG 펌프(21)(P-201)는 LT201A 또는 제 2LNG 펌프(22)(P-202)는 LT201B))이 80%이상 충전이 되기 까지 대기한다.The LNG pump 20 selected to be driven is completely cooled down, and the water level of the LNG pump 20 (LNG LEVEL (first LNG pump 21) (P-201) is LT201A or second LNG pump 22 (P-202). waits until LT201B)) is charged over 80%.

만약에 LNG 펌프(20)로 공급되는 유입관로측의 온도센서(40)(E-201) 온도가 -130℃ 이하가 아니거나, LNG 펌프(20)의 수위가 80%이상이 아니라면, LNG 펌프(20)는 저압 저장탱크(11)와 연결된 리턴밸브(24)(BOG return Valve, AOV-203)의 Open을 계속 유지하여, LNG 펌프(20)에서 발생되는 BOG(증발가스)를 저압 저장탱크(11)(TK-101)로 회수하여, 사전에 유입관로측의 온도센서(40)(TE-201)의 온도와 고압 저장탱크(12)의 수위(LNG Level)을 확인하여 충족되었는지 확인한다.If the temperature of the temperature sensor 40 (E-201) on the inlet pipe side supplied to the LNG pump 20 is not below -130°C or the water level of the LNG pump 20 is not above 80%, the LNG pump (20) continues to maintain the open of the return valve 24 (BOG return Valve, AOV-203) connected to the low-pressure storage tank 11, and stores BOG (evaporated gas) generated from the LNG pump 20 into the low-pressure storage tank. (11) (TK-101), check the temperature of the temperature sensor 40 (TE-201) on the inlet pipe side and the water level (LNG Level) of the high-pressure storage tank 12 in advance .

이러한 조건이 충족 되었다면 약 10분 후, LNG 펌프(20)에서 발생되는 BOG를 저압 저장탱크(11)(TK-101)로 되돌려 보내는 리턴밸브(24)를 Close 한다.If these conditions are satisfied, after about 10 minutes, the return valve 24 for returning the BOG generated from the LNG pump 20 to the low pressure storage tank 11 (TK-101) is closed.

이후, 리턴밸브(24)를 Close된 후에도 LNG 펌프(20)의 가동조건이 충족하지 않을때는 리턴밸브(24)는 다시 OPEN되어야 함은 당연할 것이며, LNG 펌프(20)의 운전 조건을 충족하면 리턴밸브(24)는 Close되고 5분 후 LNG 펌프(20)는 가동되는 것이다.After that, even after the return valve 24 is closed, when the operation condition of the LNG pump 20 is not satisfied, it will be natural that the return valve 24 should be opened again, and if the operation condition of the LNG pump 20 is satisfied, The return valve 24 is closed and the LNG pump 20 is operated after 5 minutes.

4. 상기 LNG 펌프(20)를 통해 저압 저장탱크(11)에서 LNG가 이송되어 저장되는 고압 저장탱크(12) 내부의 압력이 체크되는 단계(S400):4. A step of checking the pressure inside the high-pressure storage tank 12 in which LNG is transported and stored from the low-pressure storage tank 11 through the LNG pump 20 (S400):

상기 고압 저장탱크(12)에 설치되는 정압기를 통해, 고압 저장탱크(12)의 압력이 사전설정압력인 1.2Mpa 이상인지 이하인지 체크되고, 측정압력이 사전설정압력(EX: 1.2Mpa) 이상이면 고압 저장탱크(12)의 상단측 제 1공급밸브(13)를 통해 LNG가 이송되고, 측정압력이 사전설정압력(EX: 1.2Mpa) 미만이면 고압 저장탱크(12)의 하단측 제 2공급밸브(14)를 통해 LNG가 이송되는 단계이다.Through the static pressure device installed in the high-pressure storage tank 12, it is checked whether the pressure of the high-pressure storage tank 12 is above or below the preset pressure of 1.2Mpa, and if the measured pressure is above the preset pressure (EX: 1.2Mpa) When LNG is transferred through the first supply valve 13 on the upper side of the high-pressure storage tank 12 and the measured pressure is less than the preset pressure (EX: 1.2Mpa), the second supply valve on the lower side of the high-pressure storage tank 12 (14) is a step in which LNG is transferred.

(고압 저장탱크(12)(TK-102)의 압력이 Low값(1.0Mpa) 이상일 때, 고압 저장탱크(12)의 상단측 제 1공급밸브(13)가 Open되고, 고압 저장탱크(12)의 압력이 LowLow값(0.8Mpa)이하로 내려가면 고압 저장탱크(12)의 하단측 제 2공급밸브(14)가 Open된다. 물론, 이러한 제 1공급밸브(13) 또는 제 2공급밸브(14)는 Close조건(LNG 펌프(20)의 정지조건)이 될 때까지 Open상태를 유지한다.)(When the pressure of the high pressure storage tank 12 (TK-102) is higher than the Low value (1.0 Mpa), the upper first supply valve 13 of the high pressure storage tank 12 is opened, and the high pressure storage tank 12 The second supply valve 14 on the lower side of the high-pressure storage tank 12 is opened when the pressure of is lowered below the LowLow value (0.8Mpa). ) maintains the Open state until the Close condition (the stop condition of the LNG pump 20) is reached.)

이러한 LNG 펌프(20)의 운전조건을 간략히 요약하면 하기와 같다.The operating conditions of the LNG pump 20 are briefly summarized as follows.

첫째, 고압 저장탱크(12)가 수위(Level)가 Low일 경우(단, 저압 저장탱크(11)의 수위(Level)가 Low가 아닐 때)First, when the water level (Level) of the high-pressure storage tank (12) is Low (however, when the water level (Level) of the low-pressure storage tank (11) is not Low)

둘째, 고압밸브의 제 1, 2공급밸브(13, 14) 중 하나가 Open일 경우,Second, when one of the first and second supply valves 13 and 14 of the high-pressure valve is open,

셋째, 개폐밸브(V1) 및 LNG 펌프(20) 중 하나의 인입밸브(V2) Open일 경우Third, when the inlet valve (V2) of one of the on/off valve (V1) and the LNG pump (20) is open

넷째, LNG 펌프(20)의 수위가 High Level(LT201A,B, 80%) 이상, (잠입식이므로 80%이상에서 운전시작)인 경우Fourth, when the water level of the LNG pump 20 is higher than High Level (LT201A, B, 80%)

다섯째, LNG 펌프(20)의 입구온도 -130℃ 이하인 경우이다.Fifth, the inlet temperature of the LNG pump 20 is -130° C. or less.

5. 상기 LNG 펌프(20)가 구동되어, 저압 저장탱크(11)에서 고압 저장탱크(12)로 LNG가 이송되는 단계(S500) 및5. The LNG pump 20 is driven to transport LNG from the low-pressure storage tank 11 to the high-pressure storage tank 12 (S500) and

6. 상기 고압 저장탱크(12)의 정지조건이 만족될 시, LNG 펌프(20)의 구동이 멈추며 이송공정이 완료되는 단계(S600): 상기와 같이 S400단계까지 모두 만족하면, S500단계를 통해 LNG 펌프(20)가 가동되어 LNG가 이송되도록 하고, 고압 저장탱크(12)의 정지조건이 만족되면, LNG 펌프(20)가 정지하는 단계이다.6. When the stop condition of the high-pressure storage tank 12 is satisfied, the operation of the LNG pump 20 is stopped and the transfer process is completed (S600): If all of the steps up to S400 are satisfied as described above, through step S500 When the LNG pump 20 is operated to transport LNG and the stop condition of the high-pressure storage tank 12 is satisfied, the LNG pump 20 is stopped.

다시말해, LNG 펌프(20)가 가동되면 정지조건이 되기 전까지 LNG는 저압 저장탱크(11)에서 고압 저장탱크(12)로 LNG 펌프(20)를 통해 이송 된다. 이후, 고압 저장탱크(12)의 수위가 사전설정 수위에 도달(ex: LEVEL HIGH(LT101B : 75%)하게 되면, LNG 펌프(20)가 정지되고, 이렇게 LNG 펌프(20)가 정지되면 10분 후, LNG 펌프(20)의 인입밸브(V2), 고압 저장탱크(12)의 제 1, 2공급밸브(13, 14)는 Close 되고. 리턴밸브(24)는 Open 된다.In other words, when the LNG pump 20 is operated, the LNG is transferred from the low pressure storage tank 11 to the high pressure storage tank 12 through the LNG pump 20 until the stop condition is reached. Thereafter, when the water level of the high-pressure storage tank 12 reaches a preset water level (ex: LEVEL HIGH (LT101B: 75%), the LNG pump 20 is stopped, and when the LNG pump 20 is stopped in this way, 10 minutes Then, the inlet valve V2 of the LNG pump 20 and the first and second supply valves 13 and 14 of the high-pressure storage tank 12 are closed, and the return valve 24 is opened.

이러한 LNG 펌프(20)의 정지조건을 간략히 요약하면 하기와 같다.A brief summary of the stopping conditions of the LNG pump 20 is as follows.

상기 저압 저장탱크(11)의 수위가 20% ~ 30% 이하인 제 1경우,In the first case where the water level of the low pressure storage tank 11 is 20% to 30% or less,

상기 고압 저장탱크(12)의 수위가 75% ~ 85% 이상인 제 2경우,In the second case, the water level of the high-pressure storage tank 12 is 75% to 85% or more,

상기 LNG 펌프(20)의 수위가 사전설정된 최저수위의 범위인 제 3경우,In the third case where the water level of the LNG pump 20 is in the range of the preset lowest water level,

상기 LNG 펌프(20)의 토출압력이 1Mpa이하인 제 4경우,In the fourth case where the discharge pressure of the LNG pump 20 is 1 Mpa or less,

상기 저압 저장탱크(11)의 개폐밸브(V1), LNG 펌프(20)의 인입밸브(V2), 고압 저장탱크(12)의 공급밸브(V3) 중 어느 하나의 밸브가 OFF되는 제 5경우 중, 어느 하나가 발생되는 경우, LNG 펌프(20)의 구동이 정지되는것이다.In the fifth case in which any one of the opening/closing valve V1 of the low pressure storage tank 11, the inlet valve V2 of the LNG pump 20, and the supply valve V3 of the high pressure storage tank 12 is OFF , when any one occurs, the driving of the LNG pump 20 is stopped.

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 균등범위 내에서 다양한 수정 및 변경이 가능함은 물론이다.As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and changes are possible within the scope of equivalents of the claims to be described.

11: 저압 저장탱크 12: 고압 저장탱크
13: 제 1공급밸브 14: 제 2공급밸브
20: LNG 펌프 21: 제 1LNG 펌프
22: 제 2LNG 펌프 23: 모터
24: 리턴밸브 30: 바이패스 관로
40: 온도센서 100: 제어패널
110: 제 1제어레버 120: 제 2제어레버
200: LNG 위성기지 운영시스템
210: 펌프 조작창 220: 이송방법 조작창
V1: 개폐밸브 V2: 인입밸브
V3: 공급밸브11: low pressure storage tank 12: high pressure storage tank
13: first supply valve 14: second supply valve
20: LNG pump 21: first LNG pump
22: second LNG pump 23: motor
24: return valve 30: bypass pipe
40: temperature sensor 100: control panel
110: first control lever 120: second control lever
200: LNG satellite base operating system
210: pump operation window 220: transfer method operation window
V1: on/off valve V2: inlet valve
V3: supply valve

Claims (3)

LNG탱크로부터 가스발전기로 NG를 공급하기 위한 공정 중, LNG를 LNG 저압 저장탱크(11)에서 LNG 고압 저장탱크(12)로 옮기는 이송공정의 제어방법으로,
LNG 펌프(20)가 자동운전으로 선택되는 단계(S100);
복수개의 LNG 펌프(20) 중 구동될 LNG 펌프(20)가 선택되는 단계(S200);
선택된 상기 LNG 펌프(20)의 자동운전을 위한 시작조건이 체크되는 단계(S300);
상기 LNG 펌프(20)의 자동운전을 위한 시작조건이 부합되면, LNG 펌프(20)를 통해 저압 저장탱크(11)에서 LNG가 이송되어 저장되는 고압 저장탱크(12) 내부의 압력이 체크되어, 상기 고압 저장탱크(12)의 측정압력이 사전설정압력 이상이면 고압 저장탱크(12)의 상단측 제 1공급밸브(13)를 통해 LNG가 이송되고, 측정압력이 사전설정압력 미만이면 고압 저장탱크(12)의 하단측 제 2공급밸브(14)를 통해 LNG가 이송되는 단계(S400);
상기 LNG 펌프(20)가 구동되어, 저압 저장탱크(11)에서 고압 저장탱크(12)로 LNG가 이송되는 단계(S500);
상기 LNG 펌프(20)의 정지조건이 만족될 시, LNG 펌프(20)의 구동이 멈추며 이송공정이 완료되는 단계(S600); 를 포함하여 이루어지며,
상기 S100단계는
LNG 이송을 위해 설치되는 제어패널(100)에서 제 1제어레버(110)가, 수동운전과 자동운전 중 '자동운전'으로 선택되는 단계(S110);와, 상기 제어패널(100)에서 제 2제어레버(120)가, 인버터(INV), OFF, 바이패스(BY) 중 '인버터'로 선택되는 단계(S120);로 이루어지고,
상기 S200단계는
LNG 위성기지 운영시스템(200)의 디스플레이 창에서, 복수개의 LNG 펌프(20) 중 하나가 선택되는 단계(S210);와, LNG 위성기지 운영시스템(200)의 디스플레이 창에 표시된 이송방법 조작의 LNG 이송방법으로 '자동'이 선택되는 단계(S220);로 이루어지는 것을 특징으로 하는 LNG 공급시스템의 이송공정 제어방법.
In the process for supplying NG from the LNG tank to the gas generator, it is a control method of the transfer process of moving LNG from the LNG low-pressure storage tank 11 to the LNG high-pressure storage tank 12,
The LNG pump 20 is selected for automatic operation (S100);
selecting an LNG pump 20 to be driven from among the plurality of LNG pumps 20 (S200);
Checking the starting conditions for the automatic operation of the selected LNG pump 20 (S300);
When the starting conditions for automatic operation of the LNG pump 20 are met, the pressure inside the high-pressure storage tank 12 in which LNG is transported and stored from the low-pressure storage tank 11 through the LNG pump 20 is checked, If the measured pressure of the high-pressure storage tank 12 is equal to or greater than the preset pressure, LNG is transferred through the first supply valve 13 on the upper side of the high-pressure storage tank 12, and if the measured pressure is less than the preset pressure, the high-pressure storage tank (12) the step of transporting LNG through the second supply valve 14 on the lower side (S400);
The LNG pump 20 is driven to transport LNG from the low-pressure storage tank 11 to the high-pressure storage tank 12 (S500);
When the stopping condition of the LNG pump 20 is satisfied, the operation of the LNG pump 20 is stopped and the transfer process is completed (S600); is made, including
The step S100 is
In the control panel 100 installed for LNG transport, the first control lever 110 is selected as 'automatic operation' among manual operation and automatic operation (S110); and the second control lever 110 in the control panel 100 The control lever 120 is selected as an 'inverter' among inverter INV, OFF, and bypass BY (S120); consists of;
The step S200 is
In the display window of the LNG satellite base operating system 200, one of the plurality of LNG pumps 20 is selected (S210); A method of controlling the transfer process of an LNG supply system, comprising the step of selecting 'automatic' as the transfer method (S220).
 제 1항에 있어서,
상기 S300단계에서
상기 LNG 펌프(20)의 자동운전을 위한 시작조건은
상기 LNG 펌프(20)의 주입구에 설치된 온도센서(40)를 통해, 구동선택된 LNG 펌프(20)의 LNG 주입구 온도가 -140℃ 이하인지 체크되는 단계(S310);
상기 고압 저장탱크(12)에 설치되는 계량기를 통해, 내부 수위가 40%이하인지 체크되는 단계(S320);
상기 LNG 펌프(20)에 설치되는 수위센서를 통해, LNG 펌프(20) 내부의 LNG 수위가 80% 이상인지 체크되는 단계(S330);
상기 저압 저장탱크(11)의 개폐밸브(V1), LNG 펌프(20)의 인입밸브(V2), 고압 저장탱크(12)의 공급밸브(V3) 중 어느 하나의 밸브가 ON되었는지 확인되는 단계(S340); 로 이루어져,
상기 S310 ~ S340단계가 모두 만족되는 경우에 S400단계가 진행되도록 하는 것을 특징으로 하는 LNG 공급시스템의 이송공정 제어방법.
The method of claim 1,
In the step S300
The starting condition for automatic operation of the LNG pump 20 is
a step of checking whether the temperature of the LNG inlet of the LNG pump 20 selected to be driven is -140° C. or lower through the temperature sensor 40 installed at the inlet of the LNG pump 20 (S310);
Checking whether the internal water level is 40% or less through a meter installed in the high-pressure storage tank 12 (S320);
A step of checking whether the LNG water level inside the LNG pump 20 is 80% or more through a water level sensor installed in the LNG pump 20 (S330);
Checking whether any one of the on/off valve V1 of the low pressure storage tank 11, the inlet valve V2 of the LNG pump 20, and the supply valve V3 of the high pressure storage tank 12 is turned on ( S340); consists of,
The transfer process control method of the LNG supply system, characterized in that the step S400 proceeds when all of the steps S310 to S340 are satisfied.
 제 1항에 있어서,
상기 S600단계에서는
LNG 펌프(20)의 구동이 정지되는 정지조건으로서,
상기 저압 저장탱크(11)의 수위가 20% ~ 30% 이하인 제 1경우,
상기 고압 저장탱크(12)의 수위가 75% ~ 85% 이상인 제 2경우,
상기 LNG 펌프(20)의 수위가 사전설정된 최저수위의 범위인 제 3경우,
상기 LNG 펌프(20)의 토출압력이 1Mpa이하인 제 4경우,
상기 저압 저장탱크(11)의 개폐밸브(V1), LNG 펌프(20)의 인입밸브(V2), 고압 저장탱크(12)의 공급밸브(V3) 중 어느 하나의 밸브가 OFF되는 제 5경우 중,
어느 하나가 발생되는 경우, LNG 펌프(20)의 구동이 정지되는 것을 특징으로 하는 LNG 공급시스템의 이송공정 제어방법.
The method of claim 1,
In step S600,
As a stop condition in which the driving of the LNG pump 20 is stopped,
In the first case where the water level of the low pressure storage tank 11 is 20% to 30% or less,
In the second case, the water level of the high-pressure storage tank 12 is 75% to 85% or more,
In the third case where the water level of the LNG pump 20 is in the range of the preset lowest water level,
In the fourth case where the discharge pressure of the LNG pump 20 is 1 Mpa or less,
In the fifth case in which any one of the opening/closing valve V1 of the low pressure storage tank 11, the inlet valve V2 of the LNG pump 20, and the supply valve V3 of the high pressure storage tank 12 is OFF ,
When any one occurs, the method of controlling the transfer process of the LNG supply system, characterized in that the driving of the LNG pump (20) is stopped.
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JP2014512474A (en) * 2011-03-11 2014-05-22 デウ シップビルディング アンド マリーン エンジニアリング カンパニー リミテッド Method of operating fuel supply system for offshore structure having reliquefaction device and high pressure natural gas injection engine
KR101423003B1 (en) * 2013-08-29 2014-07-23 현대중공업 주식회사 A Treatment System of Liquefied Natural Gas

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