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Installation structure of small skid-mounted LNG boil-off gas reliquefaction recovery device

A liquefied natural gas and recovery device technology, applied in liquefaction, refrigeration, liquefaction, solidification and other directions, can solve the problems of high price, unsuitability, complex device process, etc., to reduce installation and maintenance costs, and improve the effect of reliquefaction efficiency

Active Publication Date: 2016-01-13
KELINEN NEW ENERGY TECH (JIANGSU) CO LTD
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Problems solved by technology

The BOG reliquefaction method currently mainly adopts the conventional nitrogen expansion or mixed refrigerant liquefaction process, but the device process used in this method is complicated, the equipment is too much, the price is expensive, and it is not suitable for LNG transport tankers and small LNG storage. Use of tanks and LNG vehicle filling stations

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  • Installation structure of small skid-mounted LNG boil-off gas reliquefaction recovery device
  • Installation structure of small skid-mounted LNG boil-off gas reliquefaction recovery device
  • Installation structure of small skid-mounted LNG boil-off gas reliquefaction recovery device

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0047] Aiming at the problems existing in the BOG reliquefaction technology in the prior art, the present invention provides a small skid-mounted liquefied natural gas vapor reliquefaction recovery device using a regenerative low-temperature refrigerator. The device adopts a large cooling capacity regenerative The cryogenic refrigerator is used as a cold source to liquefy the evaporated gas in the LNG storage tank. It has the advantages of compact structure, simple process flow, high reliquefaction...

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Abstract

The invention provides a mounting structure of a small skid-mounted evaporation gas reliquefaction and recovery device for liquefied natural gas. The mounting structure comprises a cryogenic storage tank (1), a regenerative cryo refrigerator (3) and a condensing heat exchanger (4). The condensing heat exchanger (4) is mounted at the cold end of the regenerative cryo refrigerator (3); an evaporation gas delivering channel A and a liquefied natural gas delivering channel B are arranged between the cryogenic storage tank (1) and the condensing heat exchanger (4); the liquefied natural gas at the position of the condensing heat exchanger (4) can enter the cryogenic storage tank (1) along the liquefied natural gas delivering channel B under the action of gravity. By the arrangement, the reliquefaction efficiency, operational reliability and security of the system can be improved, and mounting and maintaining costs can be lowered at the same time.

Description

technical field [0001] The present invention relates to the technical field of reliquefaction and recovery of boil-off gas (BOG) during the storage and transportation of liquefied natural gas (LNG), more specifically, it relates to the reliquefaction recovery of small skid-mounted liquefied natural gas boil-off gas using a regenerative cryogenic refrigerator The method of installation of the device. Background technique [0002] Liquefied natural gas (LNG for short), the main component is methane, is recognized as the cleanest energy on earth. Colorless, odorless, non-toxic and non-corrosive, its volume is 1 / 625 of the volume of the same volume of gaseous natural gas, and the weight of liquefied natural gas is only about 45% of the same volume of water. Gaseous natural gas is compressed and cooled to its boiling point (-161.5°C) to become LNG, stored in low-temperature storage tanks, transported by special ships or tank trucks, and re-gasified when used. Compared with gase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J1/02
Inventor 巨永林郝熙欢祝铁军
Owner KELINEN NEW ENERGY TECH (JIANGSU) CO LTD
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