CN217503329U

CN217503329U - Device for filling high-capacity LNG power ship by tank car

Info

Publication number: CN217503329U
Application number: CN202221585830.1U
Authority: CN
Inventors: 李海伦; 邹勇; 王彦
Original assignee: Shanghai Gas Engineering Design & Research Co ltd
Current assignee: Shanghai Energy Construction Engineering Design And Research Co ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-09-27
Anticipated expiration: 2032-06-23

Abstract

The utility model discloses a device for filling a large-capacity LNG power ship by a tank car, which comprises an LNG tank car, wherein LNG fuel is transported to a filling place to fill the LNG power ship with the LNG fuel; the LNG low-temperature immersed pump is arranged on the LNG power ship and used for filling LNG into the LNG power ship; the BOG compressor is installed on the LNG power ship, when the pressure in the LNG power ship is insufficient, the BOG compressor is started, BOG in the LNG power ship is pumped out and pressurized and input into the LNG power ship, and LNG in the LNG power ship is input into the LNG power ship by utilizing the pressure difference between the LNG power ship and the LNG tank car, so that the LNG power ship is filled; the liquid-phase LNG filling pipeline assembly is used for filling the liquid-phase LNG from the LNG tank car to the LNG power ship; and the gas-phase BOG conveying pipeline assembly is used for conveying BOG gas from the LNG power ship to the LNG tank wagon. The device has the advantages of good maneuverability, simplicity in operation and short construction period, and is suitable for filling temporary high-capacity LNG power ships.

Description

Device for filling high-capacity LNG power ship by tank car

Technical Field

The utility model relates to a LNG filling equipment field especially relates to a device of tank wagon to large capacity LNG power boats and ships filling.

Background

With the increasing emission standards of ships, LNG (Liquefied Natural Gas) powered ships are gaining increasing favor. The marine LNG mainly comprises a single LNG fuel and a dual-fuel engine, and the single LNG is generally adopted as a main energy source by the LNG transport ship.

With the emergence of power ships using LNG as fuel, the problems of difficult LNG filling and high filling cost are more and more prominent, so that the problem that the filling is a key link on an LNG fuel water supply chain and needs to be firstly solved when the LNG is popularized and used as the marine fuel is also highlighted. At present, the filling mode of the mainstream LNG power ship abroad is the filling mode of a shore station-ship and a wharf ship-ship, but the filling mode needs to build a shore station, the construction period is long, and the investment is large. At present, the construction of domestic LNG power ship filling supporting facilities is still in a starting stage, most of LNG power ships are filled with gas by tank cars, but the tank car filling capacity of the method is small, the filling speed is slow, and particularly when the LNG pressure of the tank cars is low, the filling requirement cannot be met.

Accordingly, those skilled in the art have endeavored to develop a means for tanker-filling large capacity LNG-powered vessels.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is to provide a filling speed, especially in case of low tank car pressure.

In order to achieve the above object, the utility model provides a device of tank wagon to large capacity LNG power boats and ships filling which characterized in that, the device includes:

the LNG tank car is used for transporting LNG fuel to a filling place and filling the LNG fuel into the LNG power ship;

the LNG low-temperature immersed pump is arranged on the LNG power ship and is used for filling LNG fuel into the LNG power ship;

the BOG compressor is installed on the LNG power ship, when the pressure in the LNG tank wagon is insufficient, the BOG compressor is started, BOG gas in the LNG power ship is extracted and pressurized and input into the LNG tank wagon, and LNG fuel in the LNG tank wagon is input into the LNG power ship by utilizing the pressure difference between the LNG tank wagon and the LNG power ship to finish the filling of the LNG power ship;

the EAG diffusing system is arranged on the LNG power ship and is used for heating and diffusing EAG gas generated by overpressure on the LNG power ship;

the liquid-phase LNG filling pipeline assembly is arranged between the LNG tank car and the LNG power ship and is used for filling liquid-phase LNG from the LNG tank car to the LNG power ship;

and the gas-phase BOG conveying pipeline assembly is arranged between the LNG tank wagon and the LNG power ship and realizes that the BOG gas is input into the LNG tank wagon from the LNG power ship.

Further, the liquid phase LNG filling pipeline assembly comprises a first connecting pipeline, a second connecting pipeline, a first conveying pipeline and a first valve assembly, the first connecting pipeline is connected with the LNG tank wagon and the first conveying pipeline, the second connecting pipeline is connected with the first conveying pipeline and the liquid phase pipeline of the LNG power ship, the first valve assembly is installed in the first conveying pipeline, and the liquid phase LNG is safely and reliably filled into the LNG power ship.

Further, the first connecting pipe and the second connecting pipe in the liquid-phase LNG refueling pipe assembly are metal hoses.

Further, the first conveying pipeline in the liquid-phase LNG filling pipeline assembly is a heat preservation pipeline.

Further, the first valve assembly in the liquid-phase LNG refueling pipeline assembly includes a cryogenic stop valve, an emergency automatic shutoff valve, a safety valve, a check valve, and a needle valve.

Further, the gas-phase BOG delivery pipe assembly comprises a third connection pipe, a fourth connection pipe, a second delivery pipe and a second valve assembly, wherein the third connection pipe connects the LNG tanker and the second delivery pipe, the fourth connection pipe connects the second delivery pipe and the gas-phase pipe of the LNG-powered vessel, and the second valve assembly is installed in the second delivery pipe to control the BOG gas to be safely delivered from the LNG-powered vessel to the LNG tanker.

Further, the third connecting pipe and the fourth connecting pipe in the gas-phase BOG conveying pipe assembly are metal hoses.

Further, the second valve assembly in the gas phase BOG delivery conduit assembly includes a shut-off valve.

Further, a stop valve is installed between the liquid-phase LNG filling pipeline assembly and the gas-phase BOG conveying pipeline assembly.

Furthermore, the number of the LNG tank cars can be N, the N LNG tank cars are connected in parallel and are used for filling the LNG power ship at the same time, and filling efficiency is improved, wherein N is a natural number and is not less than 2.

In the preferred embodiment of the present invention, compared with the prior art, the present invention has the following advantages:

1. the filling speed can be improved, and particularly when the pressure of a tanker truck is insufficient, the filling of the LNG power ship is completed by using BOG gas in the LNG power ship;

2. good maneuverability, simple operation, short construction period and low investment cost, and is suitable for temporary high-capacity LNG power ship filling

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is a process diagram of filling an LNG powered vessel with an LNG tanker according to a preferred embodiment of the present invention;

fig. 2 is a plan view of the process pipeline in the unloading process area according to a preferred embodiment of the present invention.

The system comprises a 1-LNG tank car, a 2-liquid-phase LNG filling pipeline assembly, a 3-LNG power ship, a 4-EAG diffusing system, a 5-gas-phase BOG conveying pipeline assembly and a 6-leakage detection device.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in fig. 1, the present invention provides in a preferred embodiment a tank car device for filling a large-capacity LNG-powered ship, which includes: an LNG tanker 1, an LNG cryogenic submerged pump (not shown), a BOG (flash off gas) compressor (not shown), a liquid phase LNG refueling pipe assembly 2, a gas phase BOG transfer pipe assembly 5, an eag (escape air gas) discharge system 4, an LNG powered vessel 3, and a leak detection device 6, wherein,

the LNG tank car 1 is used for transporting the LNG fuel to a filling place and filling the LNG power ship 3 with the liquid LNG fuel;

the LNG low-temperature immersed pump is arranged on the LNG power ship 3 and is used for filling LNG into the LNG power ship 3;

the BOG compressor is installed on the LNG power ship 3, when the pressure in the LNG tank wagon 1 is insufficient, the BOG compressor is started, BOG gas in the LNG power ship 3 is pumped out and pressurized and is input into the LNG tank wagon 1, LNG in the LNG tank wagon 1 is input into the LNG power ship 3 by utilizing the pressure difference between the LNG tank wagon 1 and the LNG power ship 3, and the LNG power ship 3 is filled;

the liquid-phase LNG filling pipeline assembly 2 is arranged between the LNG tank car 1 and the LNG power ship 3, and liquid-phase LNG is filled into the LNG power ship 3 from the LNG tank car 1;

and the gas-phase BOG conveying pipeline assembly 3 is arranged between the LNG tank wagon 1 and the LNG power ship 3, so that BOG gas of the LNG power ship 3 is input into the LNG tank wagon 1 from the LNG power ship 3.

The utility model discloses in the preferred embodiment, through LNG low temperature immersed pump and BOG compressor, can guarantee the speed that LNG tank wagon 1 was annotated, especially when LNG tank wagon 1 pressure is not enough, through with the gaseous pressurization of BOG in LNG power boats and ships 3 input LNG tank wagon 1 back, can guarantee the filling speed under this kind of low pressure.

In the preferred embodiment of the present invention, in order to ensure safety, an EAG diffuser system 4 may be further installed on the LNG powered vessel 3, the EAG diffuser system 4 includes an EAG heater and a diffuser pipe, and the EAG gas generated by overpressure is heated by the EAG heater and then diffused by the diffuser pipe, specifically, the EAG diffuser system 4 firstly passes through the EAG heater for the diffuser gas in the LNG powered vessel 3, the specific gravity of the natural gas after heat exchange with air is smaller than that of the air, and the natural gas is easily diffused after high point diffusion, so that an explosive mixture is not easily formed; be provided with leak hunting device 5 in LNG tank wagon 1, in case when the condition that LNG revealed appears, can discover fast to in time carry out safety processing.

As shown in fig. 1, in order to carry out LNG refueling for LNG powered vessel 3, the utility model discloses a filling pipe assembly that preferred embodiment provided, including liquid phase LNG filling pipe assembly 2 and gaseous BOG transfer piping assembly 5, install the stop valve between liquid phase LNG filling pipe assembly 2 and the gaseous BOG transfer piping assembly 5, control liquid phase LNG and gaseous BOG and transmit in respective transfer piping, do not interfere with each other. The liquid-phase LNG filling pipeline assembly 2 comprises a first connecting pipeline, a second connecting pipeline, a first conveying pipeline and a first valve assembly, the first connecting pipeline is connected with the LNG tank wagon 1 and the first conveying pipeline, the second connecting pipeline is connected with the first conveying pipeline and the liquid-phase pipeline of the LNG power ship 3, and the first connecting pipeline and the second connecting pipeline are metal hoses so as to be respectively connected with the liquid-phase pipelines of the LNG tank wagon 1 and the LNG power ship 3; in order to ensure the transfer of the low-temperature liquid-phase LNG in the LNG tanker 1, the first transfer pipeline is a heat-insulating pipeline. A first valve assembly comprising a cryogenic stop valve, an emergency automatic shut off valve, a safety valve, a check valve and a needle valve is installed in the first transfer pipe to control the safe and reliable filling of liquid phase LNG into the LNG powered vessel 3.

The gas-phase BOG conveying pipeline assembly 5 comprises a third connecting pipeline, a fourth connecting pipeline, a second conveying pipeline and a second valve assembly, the third connecting pipeline is connected with the LNG tank wagon 1 and the second conveying pipeline, the fourth connecting pipeline is connected with the second conveying pipeline and the gas-phase pipeline of the LNG power ship 3, and the third connecting pipeline and the fourth connecting pipeline are metal hoses so as to be connected with the gas-phase pipelines of the LNG tank wagon 1 and the LNG power ship 3 respectively; a second valve assembly is installed in the second transfer pipe, which controls the BOG gas to be safely imported from the LNG powered vessel 3 to the LNG tanker 1, the second valve assembly including a shut-off valve.

Preferably, the number of the LNG tank cars 1 may be 2 or more than 2, and a plurality of LNG tank cars 1 are connected in parallel and simultaneously fill the LNG-powered ship 3, so that the filling efficiency is improved. When a plurality of LNG tank cars 1 are used for parallel connection and simultaneous filling, the plurality of LNG tank cars 1 are symmetrically distributed as shown in figure 1. Each LNG tanker 1 is connected to the first connection pipe of the liquid-phase LNG refueling pipe assembly 2, and the refueling of the liquid-phase LNG is controlled by the first valve assembly. Similarly, each LNG tanker 1 is also connected to the third connecting pipeline of the gas BOG pipeline assembly 5, and the LNG power ship 3 is controlled to safely input the BOG gas into each LNG tanker 1 through the second valve assembly.

As shown in fig. 2, the present invention provides an unloading process area process pipeline layout diagram, which comprises the LNG tank wagon 1 parking position, the liquid phase LNG filling pipeline assembly 2, the gas phase BOG transportation pipeline assembly 5, the unloading area and the anti-collision device, and is mainly used for parking the LNG tank wagon safely and normally.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A device of tank wagon to large capacity LNG power boats and ships filling which characterized in that, the device includes:

the BOG compressor is installed on the LNG power ship, when the pressure in the LNG tanker is insufficient, the BOG compressor is started, BOG gas in the LNG power ship is pumped out and pressurized and input into the LNG tanker, and the LNG fuel in the LNG tanker is conveyed into the LNG power ship by utilizing the pressure difference between the LNG tanker and the LNG power ship to finish the filling of the LNG power ship;

and the gas-phase BOG conveying pipeline assembly is arranged between the LNG tank wagon and the LNG power ship, so that the BOG gas is input into the LNG tank wagon from the LNG power ship.

2. The apparatus of claim 1, wherein the liquid phase LNG refueling conduit assembly comprises a first connecting conduit connecting the LNG tanker and the first transfer conduit, a second connecting conduit connecting the first transfer conduit and the liquid phase conduit of the LNG powered vessel, and a first valve assembly installed in the first transfer conduit to control the safe and reliable refueling of the liquid phase LNG to the LNG powered vessel.

3. The apparatus of claim 2, wherein the first and second connection pipes in the liquid-phase LNG refueling pipe assembly are metal hoses.

4. The apparatus of claim 2, wherein the first transfer conduit in the liquid-phase LNG refueling conduit assembly is a thermal conduit.

5. The apparatus of claim 2, wherein the first valve assembly in the liquid phase LNG refueling pipeline assembly comprises a cryogenic stop valve, an emergency automatic shutoff valve, a safety valve, a check valve, and a needle valve.

6. The apparatus of claim 1, wherein the gas phase BOG transfer piping assembly comprises a third connecting piping connecting the LNG tanker and the second transfer piping, a fourth connecting piping connecting the second transfer piping and the gas phase piping of the LNG powered vessel, a second transfer piping, and a second valve assembly installed in the second transfer piping to control safe transfer of the BOG gas from the LNG powered vessel to the LNG tanker.

7. The apparatus of claim 6, wherein the third connecting tube and the fourth connecting tube in the gas phase BOG delivery tube assembly are metal hoses.

8. The apparatus of claim 6, wherein the second valve assembly in the gas phase BOG delivery conduit assembly comprises a shut-off valve.

9. The apparatus of claim 1, wherein a shut-off valve is installed between the liquid-phase LNG refueling conduit assembly and the vapor-phase BOG transfer conduit assembly.

10. The device of claim 1, wherein the number of the LNG tank cars is N, the N LNG tank cars are connected in parallel and are used for filling the LNG powered ship at the same time, and filling efficiency is improved, wherein N is a natural number and is more than or equal to 2.