Diesel oil-LNG (liquefied natural gas) dual-fuel hybrid power ship LNG vaporizing device

Abstract

The invention discloses a diesel oil-LNG (liquefied natural gas) dual-fuel hybrid power ship LNG vaporizing device which comprises a diesel engine sea water opening type cooling circuit and an LNG vaporizing loop, wherein one end of a stop valve of the diesel engine sea water opening type cooling circuit is communicated with a sea water main pipe, and the other end of the stop valve is communicated to a sea water pump through a sea water pipeline; an output end of the sea water pump is connected with an input end of a fresh water cooler through a middle cooler and a lubricating oil cooler; the LNG vaporizing loop comprises a liquid stream observer and a water bath vaporizer, the water bath vaporizer comprises an outer tank and an inner container, the output end of the fresh water cooler is communicated to the outer tank of the water bath vaporizer by passing through the sea water pipeline and the liquid stream observer and then passes through the output end of the outer tank and a check valve to be lead to the outside of a ship board; and the output end of an LNG gas storage tank is communicated with the inner container of the water bath vaporizer, natural gas after being heated and vaporized is lead to the air main pipe of a dual-fuel diesel engine from the inner container of the vaporizer, and the vaporizing rate of the natural gas is improved by more than 20%. The normal gas supply quantity of the diesel engine is guaranteed, and the diesel oil-LNG dual-fuel hybrid power ship LNG vaporizing device has obvious economical efficiency and favorable vaporization efficiency.

Description

technical field [0001] The invention relates to a fuel device for a transport ship, in particular to an LNG vaporization device for a diesel-LNG dual-fuel hybrid ship, and belongs to the technical field of ships. Background technique [0002] In recent years, under the guidance of the country's vigorous development of energy-saving and environmental protection industries and the promotion of low-carbon economy policies, the treatment of oil and sewage pollution from ships has become a top priority. The development of ships using diesel-LNG dual-fuel marine diesel engines is an important way to promote the development of low-carbon economy. It plays a very important role in developing green shipping, reducing carbon dioxide emissions, and building low-carbon ships. [0003] LNG (Liquified Natural Gas) is the English abbreviation for liquefied natural gas, which is a colorless liquid mainly composed of methane. Components may contain small amounts of ethane, propane, nitrogen...

AI Technical Summary

Problems solved by technology

[0006] The utility model patent ZL201020269149.7 discloses a "Diesel-LNG dual-fuel LNG device for inland river dry cargo ships", including LNG gas storage tanks, isolated voids, LNG delivery pipeline, LNG gas storage tank is fixed on the main deck at the stern, an isolation void is provided between the LNG gas storage tank and the cabin on the main deck, and an awning is arranged above the LNG gas storage tank, LNG gas storage The output end of the tank is connected to one end of the natural gas delivery pipeline, and the other end of the natural gas delivery pipeline passes through the main deck at the stern and descends into the engine room, and is connected with the air main pipe of the diesel engine. This utility model patent does not provide a vaporization device for LNG

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