Double-wall pipe ventilation system of LNG power ship

Abstract

The invention provides a double-wall pipe ventilation system for an LNG power ship. The double-wall pipe ventilation system for the LNG power ship comprises a first ventilation air inlet pipeline, a flow meter, a first double-wall pipe, a second double-wall pipe, fuel gas equipment, a fuel gas inlet pipeline, a GVU valve set, a pneumatic adjustment valve, a second ventilation air inlet pipeline, afirst exhaust fan and a ventilation air outlet pipeline. According to the double-wall pipe ventilation system for the LNG power ship, the double-wall pipes are arranged in a cabin to supply gas to the fuel gas equipment, and the risk that the gas leaks into the cabin is reduced through the good protection function of the double-wall pipes. The exhaust fan is arranged to conduct mechanical exhauston the annular space in the double-wall pipes, the negative pressure state of the annular space is maintained, and it is guaranteed that once gas leaks, the gas can be exhausted out of the ship at the highest speed.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a double-wall pipe ventilation system for an LNG power ship. Background technique [0002] With the rapid development of the shipping industry in recent years, the problem of marine pollution has become increasingly serious, and a large amount of untreated waste gas has been discharged into the atmosphere, causing serious damage to the ocean and even the global ecological environment. In order to reduce the pollution caused by ship exhaust gas to the environment, the International Maritime Organization has proposed specific emission limits, hoping to improve the ecological environment of the ocean through the revision of the emission limits. In order to adapt to changes in emission restrictions, ships began to use cleaner and green energy instead of traditional energy, LNG (Liquefied Natural Gas, liquefied natural gas) has become the most suitable green fuel, and dual-fuel engines ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a double-wall pipe ventilation system for LNG powered ships, which aims to solve the deficiencies in the above-mentioned background technology. The space is ventilated to avoid gas leakage to the engine room, and at the same time, a ventilation air inlet pipeline is added at the inlet of the exhaust fan, which solves the problem of difficult selection of the exhaust fan

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