LPG (Liquefied Petroleum Gas) fuel pipeline control method

Abstract

The invention discloses an LPG fuel pipeline control method, and relates to the technical field of LNG power ship pipeline control. Comprising the steps that a water glycol system is started and circulated to a stable state, a low-pressure pump is started, a high-pressure pump is started, a fuel supply system reaches a preparation state, fuel supply of a main engine reaches specified working pressure and temperature, the main engine is loaded to small-load operation, the main engine is loaded to normal operation load, and the main engine is stopped. The engine in the marine main engine can use LPG as fuel, the cost is reduced, meanwhile, the fuel can be automatically heated, pressurized, cooled, decompressed, inerted and subjected to gas-liquid separation operation, surplus overpressure fuel can be refluxed and utilized, through a water glycol system, the LPG fuel can be heated and cooled, and the fuel can be recycled. The temperature of the device can be adjusted by other heat sources and cold sources, the device is automatically controlled to operate through a fuel supply system, the device is matched with a host control system to start and stop, automatic operation is achieved, economic benefits are met, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of LNG-powered ship pipeline control, in particular to an LPG fuel pipeline control method. Background technique [0002] On LNG-powered ships, the natural gas that is generally supplied to the main engine of the ship for combustion is vaporized by the carburetor, and the gas directly enters the cylinder of the main engine. Due to the compressibility of the gas, there is generally no need for a circuit. Now on LPG main engine ships, because LPG is liquid Petroleum gas is directly injected into the main engine cylinder to burn and do work. Considering that the liquid is incompressible and easy to overpressure, it is necessary to set up a liquid return pipe to return and collect the overpressured excess fuel. [0003] When LPG enters the host, it needs a high pressure of 50bar±2 and a temperature of 35°C±8. LPG is stored at a low temperature of -45°C in the fuel tank, and the storage pressure is lower than 5ba...

AI Technical Summary

Problems solved by technology

[0003] LPG needs a high pressure of 50bar±2 and a temperature of 35℃±8 to enter the host. LPG is stored in the fuel tank at a low temperature of -45℃, and the storage pressure is lower than 5bar, so LPG needs to be pressurized and heated before entering the main engine, and the excess LPG needs to be cooled and decompressed before returning to the fuel tank. However, the current LNG fuel pipeline control method cannot meet the use of LPG fuel.

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