LPG gas-liquid separation tank and fuel control system

Abstract

The invention discloses an LPG gas-liquid separation tank and a fuel control system, and belongs to the technical field of ship LPG power systems. The LPG gas-liquid separation tank is divided into a gas-liquid separation tank portion and a fuel supply portion, wherein the gas-liquid separation tank portion comprises a gas-liquid separation buffer tank, a second nitrogen supply pipe, a group of control signal lines and a fuel supply control unit; and the fuel supply portion comprises an LPG power ship main engine, an LPG storage tank, a first nitrogen supply pipe, another group of control signal lines and another fuel supply control unit. According to the LPG gas-liquid separation tank and the fuel control system, a gas-liquid mixture obtained after nitrogen and LPG in a pipeline are mutually replaced is collected, the fuel supply control unit is arranged, the opening degrees of a fuel supply pump and a remote control proportional valve are automatically adjusted through a VFD frequency converter, the whole fuel supply system is maintained to operate at stable pressure and flow, the remote control proportional valve is used for automatic control, gas-liquid separation at the specified pressure temperature in the buffer tank is realized, and emergency release is realized during overpressure.

Description

technical field [0001] The invention belongs to the technical field of marine LPG power systems, in particular to an LPG gas-liquid separation tank and a fuel control system. Background technique [0002] On LNG (liquefied natural gas) powered ships, the main engine of the ship is generally supplied with natural gas 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 LPG (liquefied petroleum gas) On ships, since LPG 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 install a liquid return pipe and an overpressure overflow pipe. In addition, the LPG-powered main engine needs to replace the outlet pipe with LPG before starting. Nitrogen in the pipeline needs to be replaced by nitrogen in the LPG pipeline after shutdown, and the gas-liquid mixtur...

AI Technical Summary

Problems solved by technology

[0002] On LNG (liquefied natural gas) powered ships, the main engine of the ship is generally supplied with natural gas 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 LPG (liquefied petroleum gas) On a ship, because LPG 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 install a liquid return pipe and an overpressure overflow pipe. In addition, the LPG powered main engine needs to replace the outlet pipe with LPG before starting. Nitrogen in the pipeline needs to be replaced with nitrogen to remove the LPG in the pipeline after shutdown, and the gas-liquid mixture after replacement needs to be collected and processed. At present, the general LNG fuel pipeline system design method cannot meet the use of LPG fuel.

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