cng transport ship piping system

Abstract

The invention discloses a pipeline system for a CNG transport ship. The pipeline system comprises a gas charging and discharging pipeline subsystem, a safety emission pipeline subsystem, a maintenance pipeline subsystem and management circuits matched with the subsystems. The pipeline system is characterized in that each subsystem is connected with or disconnected from gas cylinders through matched pipelines, gas cylinder upper end plug assemblies and controlled pneumatic valves; and an assembling connecting piece of each subsystem is completely arranged on a bin cover of a gas cylinder storage bin, and the two sides of an itineration channel of each bin cover are provided with a matched control system and a mechanism with an auxiliary manual control component and a random detection display component. By the adoption of the pipeline system, the pipelines are arranged on a deck on the upper layer, so that the safety of the CNG ship is improved; compared with the narrow cabin space, the pipelines are distributed in the space more flexibly, and the centralized control over gas ways is convenient; and the pipelines are arranged and designed reasonably, the structure is simple, maintenance, overhaul and centralized control are convenient.

Description

technical field [0001] The invention belongs to a compressed gas marine transportation system, and relates to a CNG carrier, in particular to a pipeline system of a CNG carrier. Background technique [0002] Compressed natural gas (CNG) carriers refer to cargo ships that transport compressed natural gas. Since they do not require expensive facilities such as liquefaction plants and regasification terminals, which help reduce shipping costs, they are increasingly popular. U.S. Patent Application No. US4,846,088 discloses a method of transporting compressed natural gas with storage containers on or above the deck of an offshore barge, comprising a plurality of pressure-forming pipes placed horizontally on the deck of the barge bottle. The disadvantage of this transportation method is that the number of pressure bottles is limited, because these pressure bottles are placed above the deck. In order to maintain sufficient stability of the barge, the amount of gas that can be loa...

AI Technical Summary

Problems solved by technology

The disadvantage of this transportation method is that the number of pressure bottles is limited, because these pressure bottles are placed above the deck. In order to maintain sufficient stability of the barge, the amount of gas that can be loaded by a single barge is greatly limited, resulting in the price of the unit loaded gas. raised

[0003] The patent application No. 96191260.X filed in China by Enlang LNG Development Co., Ltd. of the United States discloses a compressed natural gas shipping system, which is equipped with compressed gas storage containers on board, and each compressed gas storage container includes 3 to 30 Gas cylinders, the gas cylinders are installed in the cabin in a vertical direction, and the cabin is covered with a hatch cover to prevent seawater from entering. In the above system, the gas cylinders and pipelines are all covered with hatch covers. If there is any leakage of compressed natural gas , the consequences are disastrous, and how to discharge the leaked natural gas to the outside of the cargo hold on the CNG carrier is also a technical problem to be solved urgently. The compressed natural gas carrier disclosed in the patent application number 201420667174.9 is provided with a ventilating mast on the cargo hold cover, and the ventilating mast It includes a rod body with a hollow tubular structure and a vent pipeline arranged on the rod body, through which the natural gas leaked from the cylinder mouth is discharged to the outside of the cargo hold; but this structure increases the complexity of the pipeline arrangement

Moreover, the pipeline and the gas cylinder are installed in the cabin at the same time, and the space is narrow, which increases the difficulty of maintenance and repair of the pipeline.

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