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Boil-off gas compressor for lng-fueled vessel

A technology of evaporating gas and compressor, which is applied in liquid fuel engines, combustion engines, internal combustion piston engines, etc., and can solve problems such as difficulty in maintaining LNG storage tank pressure.

Active Publication Date: 2021-02-05
集群液化天然气公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has problems of difficulty in maintaining the pressure in the LNG storage tank, and a problem of economical burden due to the preparation of an expensive and high-pressure-resistant LNG storage tank

Method used

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  • Boil-off gas compressor for lng-fueled vessel
  • Boil-off gas compressor for lng-fueled vessel
  • Boil-off gas compressor for lng-fueled vessel

Examples

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0037]For LNG fueled ships, efficient use of boil-off gas is a very important issue, not only in terms of economic feasibility, but also in terms of environment. If the boil-off gas (BOG) generated in LNG-fueled ships is not properly treated, the boil-off gas must be vented into the atmosphere to protect the storage tanks. BOG is mainly composed of methane gas, whose global warming index is about 23 times higher than that of carbon dioxide, so the emission of BOG from LNG fueled ships must be strictly limited.

[0038] Although screw compressors or reciprocating compressors can be used to process the boil-off gas of LNG fueled ships, these compressors cannot directly handle the low-temperature boil-off gas, or may contaminate the LNG product due to lubricating oil. When the capacity of the centrifugal compressor is small, it is difficult to imple...

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Abstract

Provided is a boil-off gas compressor for an LNG-fueled vessel which uses LNG as fuel for a propulsion engine thereof. The boil-off gas compressor for an LNG-fueled vessel may comprise: compressor housings (24a, 24b) in which impellers (30a, 30b) are rotatably arranged; a motor housing (12) in which a motor (14) is disposed to drive the impellers (30a, 30b); and a bearing (18) for rotatably supporting rotation shafts (16a, 16b), which transfer rotation drive force of the motor (14) to the impellers (30a, 30b). The compressor housings (24a, 24b) and the motor housing (12) may be integrally formed.

Description

technical field [0001] The present invention relates to a boil-off gas compressor for an LNG-fueled ship using liquefied natural gas (LNG) as fuel for its propulsion engine, and more particularly, to a boil-off gas compressor for an LNG-fueled ship, wherein, The compressor housing is integrally formed with the motor housing. Background technique [0002] Generally, LNG carriers for transporting liquefied natural gas (LNG) have used LNG as fuel. However, in recent years, in addition to LNG carriers, various LNG fuel-powered ships using LNG as a main fuel, which is cheaper than fuel oil and is advantageous for satisfying regulations on exhaust gas in terms of preventing environmental pollution, have been constructed. [0003] The amount of LNG used as fuel loaded in an LNG-fueled ship is about 1 / 50 to 1 / 10 of the amount of LNG loaded in an LNG carrier, and compared with an LNG carrier, an LNG-fueled ship is stored in LNG. The ratio of the boil-off gas (BOG) produced in the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/06F04D29/056F04D17/12F04D29/58F04D29/10F04D27/00F04D29/42
CPCF04D25/06F04D29/4206F04D29/102F04D29/582F04D29/056F04D17/12F04D29/083F04D27/001F04D17/10F04D17/122F05D2230/53F04D29/5853F04D25/0606F04D29/284F05D2250/51F05D2250/52
Inventor 李正汉
Owner 集群液化天然气公司