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BOG recondensation and LNG (Liquefied Natural Gas) cold energy electricity-generating integrated system for LNG receiving station

An integrated system and recondensation technology, applied in the direction of machine/engine, container discharge method, gas/liquid distribution and storage, etc., can solve the problems of BOG and LNG cold energy waste, etc., to reduce energy consumption, reduce pressure, reduce The effect of energy consumption

Inactive Publication Date: 2019-03-01
DALIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0008] In order to solve the problem of waste of BOG and LNG cold energy in the above-mentioned LNG receiving station, the present invention proposes a BOG recondensation and LNG cold energy power generation integrated system for the LNG receiving station

Method used

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  • BOG recondensation and LNG (Liquefied Natural Gas) cold energy electricity-generating integrated system for LNG receiving station

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Embodiment

[0028] In this embodiment, the initial pressure of BOG in the LNG storage tank is 0.1 MPa, the temperature is -120°C, the processing capacity is 5400 kg / h, and its molar composition is: methane 87.88%, ethane 0.01%, nitrogen 12.11%. The initial pressure of LNG in the LNG storage tank is 0.1MPa, the temperature is -162°C, the processing capacity is 30400kg / h, and its molar composition is: methane 91.33%, ethane 5.36%, propane 2.14%, n-butane 0.47%, Isobutane 0.46%, n-pentane 0.01%, isopentane 0.01%, nitrogen 0.22%. Seawater pressure is 0.1MPa and temperature is 15°C. The circulating working fluid used in the LNG cold energy power generation system is R41.

[0029] Such as figure 1 As shown, an integrated system for BOG recondensation and LNG cold energy power generation in an LNG receiving station of the present invention includes: 1 LNG storage tank, 2 LNG low-pressure pump, 3 flow divider, 4 first heat exchanger, 5 compressor, 6 second Heat exchanger, 7 mixer, 8 recondense...

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Abstract

The invention belongs to the technical field of liquefied natural gas (LNG) energy utilization and provides a BOG recondensation and LNG cold energy electricity-generating integrated system for an LNGreceiving station. According to the BOG recondensation and LNG cold energy electricity-generating integrated system for the LNG receiving station, a BOG recondensation system is adopted to recycle BOG generated in an LNG storage tank, a rankine cycle electricity-generating system is adopted to recycle cold energy released in the LNG vaporization process, electric energy generated by the LNG coldenergy is used for supplying energy consumption required in the BOG recondensation recycling process, and the remaining electric energy is used for lighting work of the LNG receiving station. By meansof the BOG recondensation and LNG cold energy electricity-generating integrated system for the LNG receiving station, recycling of the BOG and effective utilization of the LNG cold energy are realized, the energy consumption of the LNG receiving station is drastically lowered, and the purposes of energy conservation and emission reduction and environment protection are achieved; and meanwhile, the BOG recondensation and LNG cold energy electricity-generating integrated system is high in flexibility and suitable for recycling utilization on the BOG and the LNG cold energy under different working conditions, a BOG recycling system and an LNG cold energy utilization system are combined according to the working conditions, and the BOG recondensation and LNG cold energy electricity-generatingintegrated system for the LNG receiving station is widely applied to the recycling utilization on the BOG and the LNG cold energy of the LNG receiving station.

Description

technical field [0001] The invention relates to a BOG recondensation and LNG cold energy power generation integrated system used in an LNG receiving station, and belongs to the technical field of liquefied natural gas (LNG) energy utilization. Background technique [0002] With the development of the world economy, the impact of the oil crisis and the increasingly serious environmental pollution caused by coal and oil, the world's energy structure is transforming to a lower-carbon energy structure. As an efficient, high-quality, and clean energy source, natural gas has been paid more and more attention to its development and application, and its proportion in energy supply will increase rapidly. [0003] In order to facilitate storage and transportation, natural gas is usually liquefied at -162°C and atmospheric pressure, which is called liquefied natural gas. The volume after liquefaction is about 1 / 600 of the original volume. Liquefied natural gas is mainly transported by...

Claims

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Application Information

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IPC IPC(8): F01K25/10F17C7/04F17C13/00
CPCF01K25/10F17C7/04F17C13/00F17C2221/033F17C2223/0161F17C2225/0123F17C2227/0339F17C2265/034
Inventor 鲍军江袁童宋春晓贺高红
Owner DALIAN UNIV OF TECH
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