Liquefied natural gas leakage recovery and boil-off gas recovery device

A technology for liquefied natural gas and evaporated gas, which is applied in liquefaction, refrigeration and liquefaction, gas treatment/storage effects, etc. It can solve the problems of LNG leakage recovery, long recovery time, and inability to realize recondensation and liquefaction recovery of LNG tankers, and achieve reduction Harmful effect

Inactive Publication Date: 2018-11-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

[0005] The Chinese patent titled small-scale skid-mounted LNG vapor re-liquefaction recovery device (publication number: CN103759496A) discloses a small skid-mounted LNG vapor re-liquefaction recovery device. The disclosed technology

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  • Liquefied natural gas leakage recovery and boil-off gas recovery device

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Embodiment Construction

[0030] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0031] Such as figure 1 As shown, a liquefied natural gas leakage recovery and evaporated gas recovery device includes a buffer insulation tank 12, a low-temperature refrigerator 10 is arranged on the buffer insulation tank 12, and a cold head extending to the inside of the buffer insulation tank 12 is arranged on the low-temperature refrigerator 10 The heat exchanger 11 and the cold head heat exchanger 11 extend into the liquefied natural gas; the inside of the buffer insulation tank 12 is provided with a cryogenic submersible pump 13 and a casing heat exchanger 16, and the amount of liquefied natural gas maintained in the buffer insulation tank 12 is over When the cryogenic submersible pump 13 and casing heat exchanger 16, the amount of liquefied natural gas maintained in the buffer insulation tank 12 and the amount of bo...

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Abstract

The invention discloses a liquefied natural gas leakage recovery and boil-off gas recovery device and particularly relates to the technical field of leakage recovery of liquefied natural gas (LNG) andrecondensation and liquefaction recovery of boil-off gas (BOG). The liquefied natural gas leakage recovery and boil-off gas recovery device comprises a buffer adiabatic tank, and a cryogenic refrigerating machine is arranged on the buffer adiabatic tank. A cold head heat exchanger extending to the inner part of the buffer adiabatic tank is arranged on the cryogenic refrigerating machine, and a cryogenic immersed pump and a double pipe heat exchanger are arranged in the inner part of the buffer adiabatic tank. A liquid inlet pipeline, a liquid return pipeline, a storage-tank boil-off gas inletpipeline and a tank-car boil-off gas inlet pipeline are connected on the buffer adiabatic tank. The tail end of the liquid inlet pipeline is connected with the cryogenic immersed pump, and the tail end of the storage-tank boil-off gas inlet pipeline and the tail end of the tank-car boil-off gas inlet pipeline are both connected with the double pipe heat exchanger. A liquid return control valve isarranged on the liquid return pipeline, a storage-tank gas inlet valve is arranged on the storage-tank boil-off gas inlet pipeline, and a control valve is arranged on the tank-car boil-off gas inletpipeline.

Description

technical field [0001] The invention relates to the technical field of recovery of leakage during storage and transportation of liquefied natural gas (LNG) and recondensation and liquefaction recovery of boil-off gas (BOG), in particular to a device for recovery of leakage of liquefied natural gas (LNG) and recovery of boil-off gas. Background technique [0002] As a recognized clean energy, liquefied natural gas has developed rapidly in recent years. There are more than 2,000 LNG filling stations in China. During the links of LNG unloading, storage, filling, and transportation, due to the heat transfer caused by the huge temperature difference between the external environment temperature and the LNG temperature, the pre-cooling and conditioning of LNG filling stations Boil-off gas (BOG) is unavoidable due to saturation and other reasons. [0003] At the same time, due to the irregular unloading of trucks, the quality of the liquid outlet pipeline of the LNG storage tank, a...

Claims

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Application Information

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IPC IPC(8): F17C5/02F17C1/12F25J1/02
CPCF17C1/12F17C5/02F17C2201/0119F17C2201/056F17C2203/03F17C2221/033F17C2223/0161F17C2225/0123F17C2225/033F17C2227/0142F17C2265/034F17C2270/0171F25J1/0201F25J1/0254
Inventor 鲍磊史少帅许晶武志峰党文义王全国于安峰
Owner CHINA PETROLEUM & CHEM CORP
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