CN106697202A - Novel offshore liquefied natural gas (LNG) filling ship - Google Patents

Abstract

The invention discloses a novel offshore liquefied natural gas (LNG) filling ship, and belongs to the technical field of ships. A shipborne device comprises an LNG liquid cargo storage tank, an LNG pipeline, a control room and a filling device. The LNG liquid cargo storage tank is fixed on an internal bottom plate in a cargo hold area; the filling device comprises a low temperature immersed pump, a liquid inlet pipe port, a filling arm, the control room and an LNG fuel gas conveying pipeline; the low temperature immersed pump is mounted in the control room; a liquid inlet port of the low temperature immersed pump is in communication with a liquid inlet and outlet port, which is formed in the bottom of the LNG liquid cargo storage tank, and a liquid-phase pipe port, which is in the liquid inlet pipe port, through the LNG fuel gas conveying pipeline; a liquid outlet port of the low temperature immersed pump is in communication with a liquid inlet port of the filling arm through the LNG fuel gas conveying pipeline and also in communication with the liquid inlet and outlet port in the bottom of the LNG liquid cargo storage tank; the LNG filling ship adopts LNG as power fuel; and small-sized LNG storage tanks and two carburetors are respectively placed in two independent areas in an engine room so as to provide power to a main engine.

Description

A kind of new marine LNG aeratings ship

Technical field

The present invention relates to a kind of ship, the specialized ships for LNG to be transported to taken-over vessel from harbour liquefaction station.Particularly, the present invention is a kind of small-sized marine transportation for LNG Power Vessels and the novel ship of aerating, belongs to technical field of ships.

Background technology

Along with rapid economic development, water-borne transport industry competition, under rise of the oil price background, energy cost accounts for the 30%~40% of water transport enterprise total production cost.Diesel oil of one liter of the LNG than one liter can save 30%~50% expense, moreover using the LNG energy than diesel oil environmental protection.Current marine ships more and more use LNG as the ship power energy, but the bottleneck of " oil to gas " is " aerating is difficult ", China LNG gas station auxiliary facilities waterborne build ground zero, the gas power ship of trial operation waterborne can take the method for changing air accumulator, risk is high during replacing, complex operation, the need for not adapting to gas power ship aerating completely, therefore, the present invention provides a kind of small-sized marine LNG aeratings ship suitable for China, this ship is a kind of small-sized movable gas storage ship, at any time flowing supply.

The content of the invention

Cannot be to the problem of LNG ship aerating under sail present invention aim to address existing bank station groove tank car so that LNG ship under sail stops gas station harbour aerating without traveling, and solves the problems such as small groove tank car aerating capacity and harbour stop inconvenience.

The present invention is achieved by the following technical programs：

A kind of new marine LNG aeratings ship, device includes LNG liquid goods air accumulator, LNG pipelines, control room and aerator on ship.The LNG air accumulators are fixed on cargo area inner bottom plating；The aerator includes that low temperature immersed pump, feed liquor fill mouth, aerating arm and control room and LNG fuel gas conveyance conduits, low temperature immersed pump is arranged in control room, the liquid phase mouth of pipe in liquid in-out mouthful and the feed liquor mouth of pipe of the inlet of low temperature immersed pump by LNG fuel gas conveyance conduit with LNG liquid goods gas storage pot bottoms is communicated, the liquid outlet of low temperature immersed pump is communicated by LNG fuel gas conveyance conduit with the inlet of aerating arm, while being communicated with the liquid in-out mouthful of LNG liquid goods gas storage pot bottoms；The LNG aeratings ship is also in itself, with LNG as power fuel, to place a small-sized LNG air accumulator and two vaporizers respectively in two independent regions of cabin setting and provide power to main frame.

The purpose of the present invention can also further be realized by following technical measures：

Foregoing LNG aerating boat equipments, wherein cargo area is used for the LNG gas storage liquid goods tank for transporting using single absolute construction formula c-type cylindrical shape tank, placed along captain direction single absolute construction formula c-type cylindrical shape tank longitudinal direction, single liquid goods tank is supported by two saddles for being welded in one with Ship Structure, to ensure that the tank body that flow container causes by difference variation stretches, wherein one saddle is rigidly connected with tank body, and another can have slip with tank body.

The present invention instead of traditional harbour gas station groove tank car aerating mode, save time and fuel that ship is at sea travelled back and forth, ship in traveling is transported to by above-mentioned small-sized marine LNG aeratings shipping, and directly by aerating ship give ship provide fuel make up, not only reduce operation costs and saved the time.The present invention is also in itself to provide power by fuel of LNG, provides fuel gas by two directly set in cabin independent LNG gas tanks, it is to avoid gas pipeline lays and excessively causes the phenomenon of liquefied natural gas excessive concentration in cabin to occur in cabin.The nitrogen oxide emission of this small-sized LNG aeratings ship is very low, therefore the present invention has significant economy and good environmental-protecting performance in sum.

The present invention is specially provided with a control room on the stem deck of cargo hold front end, it is to avoid all exposure outside, improves the security performance of ship to the pipeline and equipment of main LNG gasifaction.The aerating arm arm end that board is set can freely adjust aerating path according to distance, improve the convenient and efficiency of fueling process.

Advantages of the present invention and feature, for illustration and explanation, these embodiments by the non-limitative illustration of preferred embodiment below are only given as an example referring to the drawings.

Brief description of the drawings

Fig. 1 is structural representation of the invention；

Fig. 2 is the top view of Fig. 1；

Fig. 3 is Arrangement of Engine-room schematic diagram.

Specific embodiment

The invention will be further described with reference to the accompanying drawings and examples.

As shown in FIG. 1 to 3, the present invention is made up of the inlet 10 of LNG liquid goods air accumulator 1, aerating arm 2, control room 3, main frame fuel LNG air accumulators 4, vaporizer 5, LNG fuel gas conveyance conduit 6, low temperature immersed pump 7, the liquid in-out mouthful 8, liquid outlet 9 of low temperature immersed pump of LNG liquid goods gas storage pot bottoms and aerating arm.LNG liquid goods air accumulator 1, aerating arm 2, control room 3 are arranged in more than main deck；The welding pedestal of LNG liquid goods air accumulator 1 is fixed on place in cargo tank, and aerating arm 2, control room 3 are arranged on stem right positions.Low temperature immersed pump 7 is arranged in control room 3, the inlet of low temperature immersed pump 7 is communicated by LNG fuel gas conveyance conduit 6 with the liquid in-out mouthful 8 of the bottom of LNG liquid goods air accumulator 1, the liquid outlet 9 of low temperature immersed pump 7 is communicated by LNG fuel gas conveyance conduit 6 and aerating arm 2, and aerating arm 2 is communicated with modular connection 10.Modular connection 10 is directly connected to aerating object.Main frame fuel LNG air accumulators 4, vaporizer 5 are arranged in cabin independent tank room；LNG fuel gas conveyance conduit 6 is laid using double wall casing form in cabin, and inert gas is filled in ring wall.

As depicted in figs. 1 and 2, LNG liquid goods storage tank 1 is loaded with the liquid goods LNG for aerating, and using absolute construction formula c-type cylindrical shape tank, seal is good, and security performance is high.Control room 3 is set by bow in front of cargo tank, total valve member of each gas pipeline and control is arranged in control room, improve the security performance of equipment.The right of control room 3 sets aerating arm 2, and aerating arm 2 is formed by many adjustable steel pipe linkings, and distance and length can be adjusted by adding and subtracting the quantity of pipe and the direction of rotation, improve the convenience that fueling process is adjusted the distance with direction controlling.Place a small-sized LNG air accumulator 4, vaporizer 5 in cabin top view in two cabins being independently arranged respectively；LNG gases are input into main frame and provide power by the LNG fuel gas conveyance conduit 6 of minimum distance, the time for so not only shortening LNG gasification improves the rate of gasification of LNG, also add the security of operation, so that whole device and operation are lived and movable cabin away from crewman, it is ensured that operation of ship safety and crewman's life security.

In addition to the implementation, the present invention can also have other embodiment, the technical scheme that all use equivalents or equivalent transformation are formed, in the protection domain of application claims.

Claims (4)

1. a kind of new marine LNG aeratings ship, it is characterised in that：Including LNG liquid goods air accumulator, LNG pipelines, control room and aerator.

2. the new marine LNG aeratings ship of one kind according to claim 1, it is characterised in that the LNG air accumulators are fixed on cargo area inner bottom plating；The aerator includes that low temperature immersed pump, feed liquor fill mouth, aerating arm and control room and LNG fuel gas conveyance conduits, low temperature immersed pump is arranged in control room, the liquid phase mouth of pipe in liquid in-out mouthful and the feed liquor mouth of pipe of the inlet of low temperature immersed pump by LNG fuel gas conveyance conduit with LNG liquid goods gas storage pot bottoms is communicated, the liquid outlet of low temperature immersed pump is communicated by LNG fuel gas conveyance conduit with the inlet of aerating arm, while being communicated with the liquid in-out mouthful of LNG liquid goods gas storage pot bottoms.

3. the new marine LNG aeratings ship of one kind according to claim 1, it is characterised in that itself be also, with LNG as power fuel, two independent regions are set to place a small-sized LNG air accumulator and two vaporizers respectively in cabin and provide power to main frame.

4. LNG aerators according to claim 2, wherein cargo area is used for the LNG gas storage liquid goods tank for transporting using single absolute construction formula c-type cylindrical shape tank, placed along captain direction single absolute construction formula c-type cylindrical shape tank longitudinal direction, single liquid goods tank is supported by two saddles for being welded in one with Ship Structure, to ensure that the tank body that flow container causes by difference variation stretches, wherein one saddle is rigidly connected with tank body, and another can have slip with tank body.