A floating LNG regasification system for cryogenic waters

Abstract

The invention relates to a floating liquefied natural gas regasification system used in low-temperature waters, which is characterized in that it includes: an LNG / NG conversion structure, an intermediate medium loop structure, a heating medium return flow structure and a seawater circulation structure, and the intermediate medium heater is from Heat is obtained from seawater or HM. When the inlet temperature of seawater is higher than 8°C, seawater is used as the heat source most of the time; and when the temperature of seawater is lower than 8°C, the heat source of the intermediate medium heater will be replaced by seawater and HM. The present invention introduces a heating medium in the low-temperature seawater working condition. According to different sea areas, the size and form of the heating medium can be changed. Therefore, the system can be used in various seawater working conditions, and is applicable to various sea areas in China and other foreign countries. Similar to the sea area, it can be flexibly used in various seawater working conditions, not only can adapt to low-temperature waters, but also can prevent corrosion of the intermediate medium heater. The invention can realize stable production and continuous and safe gas supply in the northern waters of China.

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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