Floating liquefied natural gas regasification system for low-temperature water area

Abstract

The invention relates to a floating liquefied natural gas regasification system for a low-temperature water area. The floating liquefied natural gas regasification system for the low-temperature water area is characterized in that the floating liquefied natural gas regasification system comprises a liquefied natural gas (LNG) / natural gas (NG) conversion structure, an intermediate medium loop structure, a heating medium backflow structure and a seawater circulating structure. An intermediate medium heater obtains heat from seawater or a heat exchanger (HM), and the seawater is used as a heat source most time when the inlet temperature of the seawater is higher than 8 DEG C; when the temperature of the seawater is lower than 8 DEG C, the HM replaces the seawater to serve as the heat source through the intermediate medium heater. According to the floating liquefied natural gas regasification system for the low-temperature water area, heating media are introduced under the low-temperature seawater working condition, the quantity and form of the heating media can be changed according to different sea areas, in this way, the system can be used in sea areas under various seawater working conditions, is suitable for all sea areas in China and similar sea areas in foreign countries, is flexibly applied to various seawater working conditions, and not only is applicable to the low-temperature water area, but also can prevent the intermediate medium heater from being corroded. By the adoption of the floating liquefied natural gas regasification system for the low-temperature water area, stable production in the water areas in the north of China can be achieved, and continuous safe gas supply is achieved.

Description

technical field [0001] The invention relates to a floating liquefied natural gas (LNG) regasification system, in particular to a floating liquefied natural gas regasification system suitable for low-temperature waters such as the northern seas of China, and capable of adapting to sea areas with different seawater working conditions and water quality conditions system. Background technique [0002] As the country's demand for energy continues to grow, the introduction of LNG plays an important role in optimizing China's energy structure, effectively solving the dual problems of energy supply security and ecological environment protection, and achieving sustainable economic and social development. The way to receive LNG is generally divided into land and sea. Nowadays, China's economic development has an increasing demand for natural gas, and there are many onshore LNG receiving stations in coastal areas. The resource allocation of LNG receiving stations, offshore floating r...

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Problems solved by technology

[0008] Existing floating LNG regasification systems are generally only suitable for sea areas with seawater temperatures above 8°C, and have certain limitations for the above-mentioned hydroclimatic conditions in the Bohai Sea, Yellow Sea, and East China Sea: on the one hand, seawater temperatures are lower than 8°C, and now Some floating liquefied natural gas regasification systems cannot be used; on the other hand, for seawater with a lot of sand and poor water quality, it will cause corrosion to the heat exchanger, shorten the service life of the equipment, and pose a safety hazard of leakage

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