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Offshore LNG receiving system and method

A receiving system and connecting system technology, applied in the field of offshore and offshore LNG receiving systems, can solve the problems of high terminal operation cost, difficult terminal site selection, large storage capacity, etc. Effect

Active Publication Date: 2017-01-04
BC P INC CHINA NAT PETROLEUM CORP +3
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for the low-temperature LNG carrier, due to its large storage capacity, the ship is usually 200-300 meters long and the full-load draft is 12-16 meter

Method used

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  • Offshore LNG receiving system and method

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Embodiment Construction

[0023] An off-shore LNG receiving system, such as figure 1 As shown, it includes: LNG receiving device 1, recondenser 2, booster pump 3, LNG vaporizer 4, pressure regulating and metering device 5, ship-shore connection system 6, BOG separation tank 7, primary compressor 8, Secondary compressor 9, small liquefaction device 10, LNG storage tank 11 for cold preservation cycle, fully cooled LNG carrier 12, and various valves 13-19 (including FV valves 14, 15, 18, 19, PV valve 16, LV valve 17 , TV valve 13), FV valve refers to flow interlock control valve, PV valve refers to pressure interlock control valve, LV valve refers to liquid level interlock control valve, TV valve refers to temperature interlock control valve. The offshore and offshore LNG receiving system is set on a ship or an offshore device, and the heat balance during system operation is regulated by an external hot water / sea water system.

[0024] in:

[0025] The LNG receiving device 1 is composed of the LNG loadi...

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Abstract

The invention discloses an offshore LNG receiving system and method. The system comprises a full-cooling type LNG transport ship, an LNG receiving device, an LNG pressurizing gasification system, a natural gas cooling system, a cold-insulation circulating system and a ship-shore connecting system. The floating type or gravity base type offshore LNG receiving system is constructed at an offshore position to rewarm imported liquefied natural gas, the liquefied natural gas is conveyed to a natural gas trunk line through a single-point mooring device and a submarine pipeline to be received at the offshore position, and therefore the problem that the address of a dock for an LNG receiving station is difficult to select is solved. A shore-based LNG receiving and gasifying function is changed to be achieved at the offshore position, and therefore occupied port shoreline resources are reduced. Compared with a traditional dock loading technology, the offshore LNG receiving system is quite suitable for regions lacking natural ports and the condition that a port plan is difficult to change, the technology is simple, investment is low, the construction period is short, and if market changes, equipment can be transferred to other regions for continuous service.

Description

technical field [0001] The invention relates to the technical field of storage and transportation of liquefied natural gas (LNG for short), in particular to an offshore LNG receiving system and method. Background technique [0002] Liquefied Natural Gas (LNG), whose main component is methane, is recognized as the cleanest fossil energy on earth. Colorless, odorless, non-toxic and non-corrosive, its volume is about 1 / 625 of the volume of the same volume of gaseous natural gas, and the mass of liquefied natural gas is only about 45% of the same volume of water. [0003] The main component of liquefied natural gas is methane, the atmospheric boiling point of methane is -161°C, the critical temperature is -84°C, and the critical pressure is 4.1MPa. The manufacturing process is to firstly purify the natural gas produced in the gas field (dehydration, dehydrocarbon, and acid gas removal), and then use the process of throttling, expansion, and external cold source refrigeration to...

Claims

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Application Information

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IPC IPC(8): F17C7/04F17C13/02
CPCF17C7/04F17C13/025F17C2221/033F17C2223/0161F17C2225/0123F17C2227/0135F17C2227/0157F17C2227/0337F17C2250/0626F17C2270/0105F17C2270/05
Inventor 廖勇郭成华杨清勤刘家洪杨晓明陆永康蒲黎明田静苏理林汪宏伟黄勇陈石义王茜
Owner BC P INC CHINA NAT PETROLEUM CORP
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