Ship LNG vaporization system supplying heat through river water

Abstract

A ship LNG vaporization system supplying heat through river water comprises a river water header pipe, a stop valve, an outer cooling pump, an intercooler, a smoke water draining sleeve, a glycol heat exchanger, a stop check valve, an LNG vaporizer and an internal combustion engine. According to the ship LNG vaporization system supplying the heat through the river water, the river water is extracted, excess heat produced by the internal combustion engine is absorbed by the intercooler to heat the river water, the river water is subjected to secondary heating through high-temperature tail gas exhausted by the internal combustion engine, thus, the river water can stably provide a heat source for the LNG vaporizer for a long term, and stable and efficient work of the LNG vaporizer is ensured.

Description

technical field [0001] The invention relates to the field of ship vaporizer structure, in particular to a ship LNG vaporization system using river water for heating. Background technique [0002] Modern river ships begin to use liquefied natural gas (LNG for short) as one of the fuels for internal combustion engines. The liquefied natural gas becomes liquid after being compressed and cooled to its boiling point (-161.5°C). Usually, the liquefied natural gas is stored in In the low-temperature storage tank at -161.5 degrees Celsius and about 0.1 MPa, the main component is methane, which 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. The manufacturing process is to first purify the natural gas produced in the gas field, and obtain it through a series of u...

AI Technical Summary

Problems solved by technology

[0003] The LNG vaporizer uses the principle of heat exchange to absorb the external heat source through the heat medium so that the liquefied natural gas reaches the vaporization temperature and then transports the natural gas from the gas pipeline to the internal combustion engine and other power components. The traditional vaporizer uses independent heating elements for heating, such as heating pipes, Steam and other methods need to consume fuel to provide a heat source for the carburetor, and the overall system is relatively large. Due to the structure, there is a certain distance between the internal combustion engine and the carburetor, and the heat will be lost during transportation, resulting in a decrease in thermal efficiency. LNG The working efficiency of the vaporizer is also reduced

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