WO2017031986A1 - Station de ravitaillement de gnl faisant appel à un stockage d'énergie bog et un différentiel de pression - Google Patents

Station de ravitaillement de gnl faisant appel à un stockage d'énergie bog et un différentiel de pression Download PDF

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Publication number
WO2017031986A1
WO2017031986A1 PCT/CN2016/077938 CN2016077938W WO2017031986A1 WO 2017031986 A1 WO2017031986 A1 WO 2017031986A1 CN 2016077938 W CN2016077938 W CN 2016077938W WO 2017031986 A1 WO2017031986 A1 WO 2017031986A1
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WO
WIPO (PCT)
Prior art keywords
bog
lng
valve
shut
storage tank
Prior art date
Application number
PCT/CN2016/077938
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English (en)
Chinese (zh)
Inventor
赵品仲
王颖
曾建兵
张静林
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自贡通达机器制造有限公司
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Application filed by 自贡通达机器制造有限公司 filed Critical 自贡通达机器制造有限公司
Priority to CN201680000767.1A priority Critical patent/CN107076358B/zh
Publication of WO2017031986A1 publication Critical patent/WO2017031986A1/fr

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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
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases

Definitions

  • the invention relates to the field of an LNG filling station, in particular to a BOG accumulator pressure difference LNG filling station.
  • LNG liquefied natural gas
  • steamships are rapidly emerging in China.
  • LNG as a fuel for automobiles and ships is safe, economical, clean, efficient, environmentally friendly and storage efficient compared to other conventional vehicle fuels.
  • the use of LNG as an alternative fuel for automobiles and ships can not only effectively reduce environmental pollution and alleviate the pressure of oil resources shortage, but also achieve sustainable economic development. The best choice for improving the environment.
  • LNG filling station is a liquefied natural gas produced or imported by LNG liquefaction plant. It is transported by tank truck to LNG filling station, and unloading and refueling is completed by submerged pump or self-pressurizing method.
  • gas station equipment especially in the pre-cooling process of the submersible pump (the submersible pump must be pre-cooled to -100 or so, in the pre-cooling process, it is often necessary to pass multiple BOG venting), a certain part of LNG will be vaporized into BOG (Boil Off Gas) gas, together with BOG gas generated by vehicles and ships.
  • BOG Bit Off Gas
  • these BOG gases can be reliquefied by running equipment, most BOGs Since the cost of recycling is relatively high, the gas is discharged in vain, which not only wastes energy but also pollutes the environment.
  • the invention provides a BOG energy storage pressure difference LNG filling station, which aims to solve the prior art problem, and provides an energy storage pressure difference LNG filling station which is energy-saving, environmentally-friendly and fully utilizes BOG gas generated by the process pipeline.
  • a BOG energy storage pressure difference LNG filling station including LNG tank truck, supercharged vaporizer, LNG low temperature storage tank, gas filling equipment and LNG filling machine, LNG tank truck is connected with pressurized vaporizer and LNG low temperature storage tank through pipeline
  • An intake pipe and an outlet pipe are arranged between the supercharged vaporizer and the LNG tank truck, the LNG low temperature storage tank is connected to the LNG dosing machine through the first pipe, and the LNG dosing machine is connected to the gas filling device, characterized in that: the gas filling
  • An LNG intake pipe and a BOG exhaust pipe are arranged between the equipment and the LNG dosing machine, and the LNG dosing machine connects the BOG heater, the LNG cryogenic storage tank and the intake pipe through the first BOG recovery pipe, and the BOG heater is connected to the BOG buffer tank.
  • the BOG buffer tank is connected to the BOG compressor, the BOG compressor is connected to the BOG storage tank, the BOG storage tank is respectively connected to the intake pipe and the first BOG recovery pipeline through the second pipeline, and the LNG cryogenic storage tank is connected to the BOG heater through the second BOG recovery pipeline.
  • the intake pipe and the outlet pipe are respectively provided with a shut-off valve F1 and a shut-off valve F2, and a connecting pipe F3, a shut-off valve F4 and a shut-off valve F5 are arranged on the connecting pipe between the LNG tank car and the LNG cryogenic storage tank,
  • the first pipe is provided with a shut-off valve F6,
  • the first BOG recovery pipe is provided with a shut-off valve F7 and a shut-off valve F8, a check valve F7 and a shut-off valve F8 and a LNG dosing machine are provided with a check valve, and the second BOG is recovered.
  • the pipeline is provided with a shut-off valve F11, the first BOG recovery pipeline and the second BOG recovery pipeline are connected and connected to the BOG heater through a shut-off valve F12, and the pipeline connected to the BOG buffer tank and the BOG compressor is provided with a shut-off valve F10, the second pipeline A shut-off valve F9 is provided thereon.
  • the motor power is reduced by 65% compared with the motor power of the low temperature submersible pump, saving the operating cost of the gas station.
  • Figure 1 is a schematic view of the structure of the present invention.
  • a BOG accumulator pressure difference LNG filling station includes an LNG tank car 1, a supercharging vaporizer 2, an LNG cryogenic storage tank 12, a gas filling device 14 and an LNG dosing machine 22, and the LNG tank car 1 passes
  • the pipeline is respectively connected with the supercharged vaporizer 2 and the LNG cryogenic storage tank 12, and between the supercharged vaporizer 2 and the LNG tanker 1 is provided with an intake pipe 23 and an outlet pipe 24, and the LNG cryogenic storage tank 12 is connected to the LNG dosing machine 22 through the pipe 25.
  • the LNG dosing machine 22 is connected to the gas filling device 14, and between the gas filling device 14 and the LNG dosing machine 22, an LNG intake pipe 26 and a BOG exhaust pipe 27 are provided, and the LNG dosing machine 22 passes the first BOG recovery pipe.
  • 28 connects BOG heater 20, LNG low temperature storage tank 12 and intake pipe 23, BOG heater 20 is connected to BOG buffer tank 19, BOG buffer tank 19 is connected to BOG compressor 16, BOG compressor 16 is connected to BOG storage tank 15, BOG storage tank 15 is connected to the intake pipe 23 and the first BOG recovery pipe 28 through the second pipe 30, respectively, and the LNG cryogenic storage tank 12 is connected to the BOG heater 20 through the second BOG recovery pipe 29.
  • the intake pipe 23 and the outlet pipe 24 are respectively provided with a shut-off valve F1 3 and a shut-off valve F2 4 , and a connecting pipe between the LNG tank car 1 and the LNG cryogenic storage tank 12 is provided with a shut-off valve F3 5 and a shut-off valve F4.
  • the first pipe 25 is provided with a shut-off valve F6 8
  • the first BOG recovery pipe 28 is provided with a shut-off valve F7 9 and a shut-off valve F8 10
  • a check valve 17 is disposed between the liquid machines 22, and a shutoff valve F11 18 is disposed on the second BOG recovery pipe 29, and the first BOG recovery pipe 28 and the second BOG recovery pipe 29 are connected and connected to the BOG heater through the shutoff valve 12 21 20.
  • the pipeline connecting the BOG buffer tank 19 and the BOG compressor 16 is provided with a shut-off valve F10 13
  • the second conduit 30 is provided with a shut-off valve F9 11.
  • the working principle of the invention is: mainly utilizing the compressibility of the gas and the incompressibility of the liquid, and collecting the stored or liquid-converted gas as energy, and when the liquid natural gas is converted into a gaseous state, the volume is increased by 600 times (this is LNG One of the intrinsic properties) these gases can only generate pressure in a limited volume of the container.
  • the gas storage tank, the gas compressor, the valve, and the corresponding process pipeline the gas is subjected to directional pressure distribution, so that a directional pressure difference is formed between the containers, and since the liquid specific gravity is much larger than the specific gravity of the gas, the high pressure container
  • the conveyed material (LNG liquid) is pressed into a container with a low pressure, and the workflow is as follows:
  • Self-boosting unloading After the LNG tanker 1 is in communication with the LNG cryogenic storage tank 12 and the pressurized vaporizer 2, the shut-off valve F1 3, the shut-off valve F2 4, the shut-off valve F3 5, the shut-off valve F4 6 and the shut-off valve 5 7 are opened. At this time, the LNG liquid in the LNG tanker 1 flows into the supercharged vaporizer 2 for vaporization, and the vaporized gas enters the LNG tank truck 1 through the pipeline of the shutoff valve F1 3 to be pressurized, when the LNG tanker 1 and the LNG cryogenic tank 12 When a certain pressure difference is reached, the LNG liquid in the LNG tanker 1 flows into the LNG low temperature storage tank 12 to realize self-pressurization unloading. After the unloading is completed, the original valves of the various shut-off valves are restored (ie, closed).
  • the LNG tanker 1 can be pressurized by using the stored BOG gas in the BOG storage tank 15, without the need to pressurize the LNG liquid after the steaming, when the LNG tanker 1 and After the corresponding pipes of the LNG low temperature storage tank 12 and the BOG storage tank 15 are connected, the shut-off valve F1 3 and the shut-off valve F8 10 are opened, and the shut-off valve F8 10 is closed after the LNG tank car 1 and the LNG low-temperature storage tank 12 are pressed, and the cut-off valve is opened.
  • BOG gas in the BOG storage tank 15 (pressure greater than the pressure of the LNG tank truck 1) enters the LNG tank truck 1 to pressurize it, when LNG in LNG tanker 1 when the pressure reaches the set pressure
  • the liquid enters the tank from the top (or bottom) of the LNG cryogenic storage tank 12 to realize unloading. After the unloading is completed, the shut-off valves are restored to their original state.
  • shutoff valve F6 8 and the shutoff valve F7 9 are opened, and the gas filling device is installed.
  • the return air of 14 enters the bottom (or top) of the LNG cryogenic storage tank 12, and the LNG cryogenic storage tank 12 is isostatic with the gas filling equipment 14, and the LNG cryogenic storage tank 12 is operated due to the gravitational potential energy of the liquid in the LNG cryogenic storage tank 12.
  • the LNG liquid enters the gas filling device 14 through the LNG dosing machine 22 to effect dosing. After the filling is completed, the shut-off valves are restored to their original state.
  • shut-off valve F6 8 When the gravitational potential energy of the liquid in the LNG cryogenic storage tank 12 cannot satisfy the liquid addition, the shut-off valve F6 8 , the shut-off valve F10 13 and the shut-off valve F12 21 are opened, and then the filling device 14 and the BOG buffer tank 19 are pressed.
  • the pressure of the tank of the gas filling device 14 is rapidly reduced to be lower than the set working pressure of the LNG storage in the LNG low temperature storage tank 12, at which time LNG
  • the LNG liquid in the low temperature storage tank 12 enters the storage tank of the gas filling device 14 through the shut-off valve F6 8 and the LNG liquid adding machine 22, so as to add liquid to the gas filling device 14, and the working pressure range set by the BOG buffer tank 19 passes through the BOG.
  • the compressor 16 is interlocked.
  • the BOG compressor 16 When the working pressure of the BOG buffer tank 19 reaches the upper limit of the set pressure, the BOG compressor 16 is automatically started, and the BOG gas in the BOG buffer tank 19 is pressed into the BOG storage which is a certain multiple of its volume.
  • the BOG gas stored in the tank 15 and stored in the BOG storage tank 15 serves as a pressurized gas source for the LNG tank 1 and the LNG cryogenic storage tank 12, that is, BOG energy storage.
  • the BOG compressor 16 When the working pressure of the BOG buffer tank 19 reaches the set pressure lower limit, the BOG compressor 16 is automatically stopped.
  • the shut-off valve F11 18, the shut-off valve F12 21, the shut-off valve F10 13, the shut-off valve F9 11, the shut-off valve F7 9, the BOG compressor 16 is started, and the LNG is turned on.
  • the BOG gas in the cryogenic storage tank 12 is pressed toward the bottom of the LNG cryogenic storage tank 12, and part of the BOG gas is liquefied by the cold energy of the LNG liquid in the LNG cryogenic storage tank 12.

Abstract

L'invention concerne une station de ravitaillement de gaz naturel liquéfié (GNL) faisant appel à un stockage d'énergie de gaz évaporé (BOG) et un différentiel de pression, qui comprend : un camion de GNL (1) ; un vaporisateur d'amplification de pression (2) ; un réservoir de GNL cryogénique (12) ; un appareil de ravitaillement de gaz (14) ; et une machine de ravitaillement de GNL liquide (22). Un tuyau d'entrée de GNL (26) et un tuyau de sortie de BOG (27) sont disposés entre l'appareil de ravitaillement de gaz (14) et la machine de ravitaillement de GNL liquide (22). La machine de ravitaillement de GNL liquide (22) est raccordée, par l'intermédiaire d'un premier canal de recyclage de BOG (28), à un dispositif de chauffage de BOG (20), au réservoir de GNL cryogénique (12) et à un tuyau d'entrée (23). Le dispositif de chauffage de BOG (20) est raccordé à un réservoir tampon de BOG (19). Le réservoir tampon de BOG (19) est raccordé à un compresseur de BOG (16). Le compresseur de BOG (16) est raccordé à un réservoir de stockage de BOG (15). Le réservoir de stockage de BOG (15) est raccordé, par l'intermédiaire d'un second canal (30), au tuyau d'entrée (23) et au premier canal de recyclage de BOG (28), respectivement. Le réservoir de GNL cryogénique (12) est raccordé au dispositif de chauffage de BOG (20) par l'intermédiaire d'un second canal de recyclage de BOG (29). Grâce aux canaux de raccordement et une soupape d'arrêt, la station de ravitaillement ne nécessite pas de pompes immergées cryogéniques ni de pompe de puisard à isolation thermique complémentaires, en économisant ainsi des coûts d'installation. De plus, l'utilisation du compresseur de BOG pour recycler et stocker un BOG ayant une certaine pression économise les coûts de fonctionnement d'une station de ravitaillement, tout en réalisant la re-liquéfaction du BOG dans un réservoir cryogénique, ce qui permet de réduire au minimum l'émission de BOG, d'économiser l'énergie et de réduire la pollution environnementale.
PCT/CN2016/077938 2015-08-24 2016-03-31 Station de ravitaillement de gnl faisant appel à un stockage d'énergie bog et un différentiel de pression WO2017031986A1 (fr)

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Application Number Priority Date Filing Date Title
CN201680000767.1A CN107076358B (zh) 2015-08-24 2016-03-31 用bog蓄能压差lng加气站卸车、加液、再液化及蓄能的方法

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CN201510520177.9 2015-08-24
CN201510520177.9A CN106481974A (zh) 2015-08-24 2015-08-24 一种bog蓄能压差lng加气站

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CN107327697A (zh) * 2017-08-14 2017-11-07 青岛锐丰源化工有限公司 瓦斯气和液化气的卸车系统
CN107687571A (zh) * 2017-09-21 2018-02-13 长春燃气热力设计研究院有限责任公司 一种压缩天然气母站加气柱放空天然气回收装置及方法
CN107816631A (zh) * 2017-11-20 2018-03-20 成都华气厚普机电设备股份有限公司 一种lng复用装置
CN108916645A (zh) * 2018-09-11 2018-11-30 江苏秋林特能装备股份有限公司 深冷液体无损充装站
CN109027662A (zh) * 2018-07-12 2018-12-18 杰瑞石油天然气工程有限公司 一种lng/l-cng橇装加气站
CN110081308A (zh) * 2019-05-30 2019-08-02 河南查瑞特种设备有限公司 一种便于取用的lng卸车装置
CN115468111A (zh) * 2022-08-30 2022-12-13 赵海丽 一种新型lng/l-cng加气站柱塞泵撬

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CN108506721B (zh) * 2018-04-25 2023-10-10 天津良华新能源科技股份有限公司 一种具有组合式储罐的加气站
CN108426166A (zh) * 2018-05-15 2018-08-21 张家港艾普能源装备有限公司 自动调压lng加液系统
FR3086993B1 (fr) * 2018-10-09 2021-11-26 Air Liquide Procede et installation de stockage et de distribution d'hydrogene liquefie
CN110410665B (zh) * 2019-08-19 2024-03-01 连云港市拓普科技发展有限公司 一种低温液化气体槽车卸车系统
US20220113086A1 (en) * 2020-10-13 2022-04-14 Galileo Technologies Corp. Integrated modular system for transfer, storage, and delivery of liquefied natural gas (lng)
US20230160533A1 (en) * 2021-11-23 2023-05-25 L'air Liquide, Societe Anonyme Pour L'etude Et L?Exploitation Des Procedes Georges Claude Liquid hydrogen trailer loading procedure for hydrogen and refrigeration recovery

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Publication number Priority date Publication date Assignee Title
CN107327697A (zh) * 2017-08-14 2017-11-07 青岛锐丰源化工有限公司 瓦斯气和液化气的卸车系统
CN107327697B (zh) * 2017-08-14 2023-07-07 青岛锐丰源化工有限公司 瓦斯气和液化气的卸车系统
CN107687571A (zh) * 2017-09-21 2018-02-13 长春燃气热力设计研究院有限责任公司 一种压缩天然气母站加气柱放空天然气回收装置及方法
CN107816631A (zh) * 2017-11-20 2018-03-20 成都华气厚普机电设备股份有限公司 一种lng复用装置
CN109027662A (zh) * 2018-07-12 2018-12-18 杰瑞石油天然气工程有限公司 一种lng/l-cng橇装加气站
CN108916645A (zh) * 2018-09-11 2018-11-30 江苏秋林特能装备股份有限公司 深冷液体无损充装站
CN110081308A (zh) * 2019-05-30 2019-08-02 河南查瑞特种设备有限公司 一种便于取用的lng卸车装置
CN115468111A (zh) * 2022-08-30 2022-12-13 赵海丽 一种新型lng/l-cng加气站柱塞泵撬

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CN106481974A (zh) 2017-03-08
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