Liquefied natural gas forced gasification system

Abstract

A liquefied natural gas forced gasification system is used for forced gasification operation of ship fuel storage holds or cargo holds, hold warming operation and differential pressure lighterage operation between the storage holds. According to the liquefied natural gas forced gasification system, a heating coil is arranged in a liquefied natural gas (LNG) storage tank and serially connected with a heat exchanger and a nitrogen buffer tank through pipelines, nitrogen is filled in the nitrogen buffer tank, and heat of the nitrogen is sent into the LNG storage tank by adopting forced circulation of a nitrogen circulation fan to promote gasification of LNG. The liquefied natural gas forced gasification system is simple in structure and safe and reliable to use, reduces manufacture cost and energy consumption during gasification, and is suitable for LNG fuel storage holds which do not often perform lighterage operation.

Description

technical field [0001] The invention relates to a liquefied natural gas (LNG) forced gasification system, which is used for the forced gasification operation, warming operation, and pressure difference transfer operation between fuel storage tanks or cargo tanks of ships. Background technique [0002] In recent years, with the increasingly serious air pollution, the global control of gas emissions from ships has become increasingly strict. Developed countries such as Europe and the United States have established their own control areas to meet Tier II and Tier III emission standards within the specified time. In order to solve the serious pollution problem of the Yangtze River and Pearl River waters, the "Gasification of the Yangtze River" and "Gasification of the Pearl River" projects have been planned. [0003] The use of natural gas for ships can reduce carbon emissions and nitrogen oxide emissions by more than 30%, sulfur emissions by more than 98%, and fuel costs by ab...

AI Technical Summary

Problems solved by technology

The cost of installing a submersible pump is relatively high, and the reliability is relatively poor; the liquid phase outlet is installed at the bottom of the storage tank. In order to prevent all the liquid from leaking from the lower opening, stricter protective measures need to be taken, and the manufacturing cost is higher.

In addition, the gasification process requires a lot of energy consumption. On average, every kilogram of LNG gasified requires 510KJ of heat or electricity.

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