CN216280622U

CN216280622U - LNG container

Info

Publication number: CN216280622U
Application number: CN202123039141.9U
Authority: CN
Inventors: 黄卫杰; 唐晓伟
Original assignee: Jiangsu Dingcheng New Energy Technology Co ltd
Current assignee: Jiangsu Dingcheng New Energy Technology Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-04-12
Anticipated expiration: 2031-12-06

Abstract

The utility model discloses an LNG container, which comprises a container frame (1), an LNG storage tank (2), a low-temperature liquid buffer tank (4) and a refrigerating device (5), and is characterized in that: install LNG storage tank (2) in container frame (1), be connected with evacuation relief valve (8) on LNG storage tank (2), be connected with gaseous admission pipe (9) on LNG storage tank (2), gaseous admission pipe (9) other end is connected with cryogenic liquid buffer tank (4), cryogenic liquid buffer tank (4) top is connected with refrigerating plant (5), cryogenic liquid buffer tank (4) bottom is connected with LNG storage tank (2) bottom through liquid back flow (10), be connected with gas pipeline valve (11) on gaseous admission pipe (9), be connected with liquid pipeline valve (12) on liquid back flow (10). The LNG container provided by the utility model can effectively prolong the transportation time of LNG, reduce the emission of BOG, and avoid resource waste and environmental pollution.

Description

LNG container

Technical Field

The utility model relates to the technical field of natural gas transportation, in particular to an LNG container.

Background

At present, the main modes of LNG transportation include LNG highway tanker transport, LNG railway transport, LNG ship transport and the like. Among them, LNG transported by ships accounts for about 80% of the total LNG transportation amount, and is the main mode of LNG transportation and introduction. Compared with the traditional LNG marine transportation mode, the LNG can be transported by adopting the tank container, the existing container ship can be directly utilized for transporting the LNG, the intermodal LNG tank container is also suitable for road and railway transportation, the seamless butt joint supply chain mode of door-to-door production and marketing and tank-to-end production and marketing can be realized, and numerous storage, loading, unloading and reloading links in the middle are saved, so that the cost is reduced.

LNG containers typically handle BOG generated during the transportation of LNG by raising design pressure. LNG containers can store LNG without pressure relief for about 1 month. If the container reaches the design pressure before reaching the end user, the evacuation safety valve in the upper part of the container will start to depressurize the tank. This not only results in waste of natural gas, but also increases environmental pollution and risks during transportation.

Therefore, at present, a novel LNG container is needed to prolong the transportation time of LNG, reduce the emission of BOG, avoid resource waste and environmental pollution, and improve the safety of LNG transportation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing an LNG container which can solve the problems of energy waste, self-discharge danger and environmental pollution in LNG transportation in the prior art.

In order to solve the technical problem, the utility model provides an LNG container, which comprises a container frame, an LNG storage tank, a cryogenic liquid buffer tank and a refrigerating device, and is characterized in that: the container is characterized in that an LNG storage tank is installed in the container frame, an emptying safety valve is connected to the LNG storage tank, a gas inlet pipe is connected to the LNG storage tank, the other end of the gas inlet pipe is connected with a cryogenic liquid buffer tank, the top of the cryogenic liquid buffer tank is connected with a refrigerating device, the bottom of the cryogenic liquid buffer tank is connected with the bottom of the LNG storage tank through a liquid return pipe, a gas pipeline valve is connected to the gas inlet pipe, and a liquid pipeline valve is connected to the liquid return pipe.

Further, the gas inlet pipe is used for guiding the BOG in the LNG storage tank into the cryogenic liquid buffer tank, and the liquid return pipe is used for returning the liquid cooled by the refrigerating device in the cryogenic liquid buffer tank into the LNG storage tank.

Further, the LNG storage tank is Type C Type storage tank.

Furthermore, the refrigerating device is refrigerating equipment such as a Stirling engine, a pulse thermoacoustic engine or an external refrigerator and comprises a hot end and a cold end, the cold end is arranged inside the low-temperature liquid buffer tank, the hot end is arranged outside the low-temperature liquid buffer tank, and the refrigerating device is connected with the low-temperature liquid buffer tank in a welding or flange mode.

Further, the gas inlet pipe and the liquid return pipe are stainless steel straight pipes or low-temperature hoses.

Furthermore, the gas inlet pipe is connected between an emptying safety valve at the upper part of the LNG storage tank and the top end or the upper end of the low-temperature liquid buffer tank, the liquid return pipe is connected between an unloading device at the bottom end of the LNG storage tank and the bottom end of the low-temperature liquid buffer tank, and the connection modes are flanges or welded connection.

Further, an aluminum heat dissipation plate is arranged inside the low-temperature liquid buffer tank and connected with the cold end of the refrigerating device, and the aluminum heat dissipation plate is a corrugated net-shaped hollow heat dissipation plate and used for improving the heat exchange area of the heat dissipation plate and ensuring that gas passes through the heat dissipation plate; meanwhile, in order to ensure the stability of the aluminum heat dissipation plate structure, a stainless steel support frame is arranged at the edge position of the aluminum heat dissipation plate.

Furthermore, a solar cell panel is laid on the right side face of the container frame and used for supplying power to the refrigerating device.

Furthermore, the low-temperature liquid buffer tank is a heat-insulation low-temperature container, and the heat insulation mode is vacuum heat insulation.

Further, the low-temperature liquid buffer tank is arranged inside the container frame and is transversely arranged side by side with the LNG storage tank, an independent support is connected with a container frame, angle iron bolt fixed connection is adopted for connection between the supports, and integrated equipment is convenient to overhaul and assemble.

Furthermore, a heat radiating device is connected to the hot end of the refrigerating device.

Compared with the prior art, the utility model has the beneficial effects that: in the LNG transportation, BOG that produces in the LNG storage tank opens gas pipeline valve door through pressure control and enters into in the cryogenic liquids buffer tank by the gas admission pipe, through the cooling reliquefaction of refrigerating plant, refrigerating plant's cold junction is equipped with aluminium system heating panel and guarantees heat transfer efficiency, liquid level rises to the settlement height in the cryogenic liquids buffer tank, the liquid pipeline valve is opened, liquid after the liquefaction returns to in the LNG storage tank by the liquid back flow, can effectively prolong the hold time of LNG container transportation, and is small in size, can motor-driven transportation, simultaneously through flange joint between the pipeline, convenient to detach's advantage.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Reference numbers in the figures:

1-container frame 2-LNG storage tank 3-solar cell panel

4-low-temperature liquid buffer tank 5-refrigerating device 6-heat dissipation device

7-aluminum heat dissipation plate 8-evacuation safety valve 9-gas inlet pipe

10-liquid return pipe 11-gas pipeline valve 12-liquid pipeline valve

51-hot end 52-cold end.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the utility model.

Referring to fig. 1, an LNG container includes a container frame 1, an LNG storage tank 2, a cryogenic liquid buffer tank 4, and a refrigeration device 5, the LNG storage tank 2 is installed in the container frame 1, an evacuation safety valve 8 is connected to the LNG storage tank 2, a gas inlet pipe 9 is connected to the LNG storage tank 2, the other end of the gas inlet pipe 9 is connected to the cryogenic liquid buffer tank 4, the refrigeration device 5 is connected to the top of the cryogenic liquid buffer tank 4, the bottom of the cryogenic liquid buffer tank 4 is connected to the bottom of the LNG storage tank 2 through a liquid return pipe 10, a gas pipeline valve 11 is connected to the gas inlet pipe 9, and a liquid pipeline valve 12 is connected to the liquid return pipe 10.

Specifically, LNG storage tank 2 is Type C Type storage tank.

Specifically, the refrigerating device 5 is a refrigerating device such as a stirling engine, a pulse thermoacoustic engine or an external refrigerator, the refrigerating device 5 comprises a hot end 51 and a cold end 52, the cold end 52 is arranged inside the low-temperature liquid buffer tank 4, the hot end 51 is arranged outside the low-temperature liquid buffer tank 4, and the refrigerating device 5 is connected with the low-temperature liquid buffer tank 4 in a welding or flange mode.

Specifically, the gas inlet pipe 9 and the liquid return pipe 10 are stainless steel straight pipes or low-temperature hoses.

Specifically, the gas inlet pipe 9 is connected between an upper evacuation safety valve 8 of the LNG storage tank 2 and the top end or the upper end of the cryogenic liquid buffer tank 4, the liquid return pipe 10 is connected between an unloading device at the bottom end of the LNG storage tank 2 and the bottom end of the cryogenic liquid buffer tank 4, and the connection mode is flange or welded connection.

Specifically, an aluminum heat dissipation plate 7 is installed inside the low-temperature liquid buffer tank 4, the aluminum heat dissipation plate 7 is connected with a cold end 52 of the refrigerating device 5, and the aluminum heat dissipation plate 7 is a corrugated net-shaped hollowed heat dissipation plate and is used for increasing the heat exchange area of the aluminum heat dissipation plate 7 and ensuring that gas passes through the corrugated net-shaped hollowed heat dissipation plate; meanwhile, in order to ensure the structural stability of the aluminum heat dissipation plate 7, a stainless steel support frame is arranged at the edge of the aluminum heat dissipation plate 7.

Specifically, a solar cell panel 3 is laid on the right side face of the container frame 1, and the solar cell panel 3 is used for supplying power to the refrigerating device 5.

Specifically, the low-temperature liquid buffer tank 4 is a heat-insulating low-temperature container, and the heat insulation mode is vacuum heat insulation.

Specifically, the hot end 51 of the refrigeration device 5 is connected with a heat dissipation device 6.

The working principle of the utility model is as follows: in the transportation, in the BOG that produces in the LNG storage tank 2 enters into cryogenic liquids buffer tank 4 by gas admission pipe 9, through the liquefaction of 5 cooling of refrigerating plant, refrigerating plant 5's cold junction 52 is equipped with aluminium system heating panel 7 and is used for guaranteeing heat transfer efficiency, and the liquid level rises to the settlement height in cryogenic liquids buffer tank 4, and liquid pipeline valve 12 opens, and the liquid after the liquefaction is leaned on the action of gravity to return to in the LNG storage tank 2 by liquid back flow 10.

In conclusion, the LNG container can effectively prolong the storage time of LNG container transportation, and has the advantages of small volume, capability of mobile transportation, convenience in disassembly due to the fact that pipelines are connected through flanges.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.

Claims

1. The utility model provides a LNG container, includes container frame (1), LNG storage tank (2), cryogenic liquids buffer tank (4), refrigerating plant (5), its characterized in that: install LNG storage tank (2) in container frame (1), be connected with evacuation relief valve (8) on LNG storage tank (2), be connected with gaseous admission pipe (9) on LNG storage tank (2), gaseous admission pipe (9) other end is connected with cryogenic liquid buffer tank (4), cryogenic liquid buffer tank (4) top is connected with refrigerating plant (5), cryogenic liquid buffer tank (4) bottom is connected with LNG storage tank (2) bottom through liquid back flow (10), be connected with gas pipeline valve (11) on gaseous admission pipe (9), be connected with liquid pipeline valve (12) on liquid back flow (10).

2. An LNG container according to claim 1, characterized in that: LNG storage tank (2) is Type C Type storage tank.

3. An LNG container according to claim 1, characterized in that: the refrigerating device (5) is refrigerating equipment such as a Stirling engine, a pulse thermoacoustic engine or an external refrigerator, the refrigerating device (5) comprises a hot end (51) and a cold end (52), the cold end (52) is arranged inside the low-temperature liquid buffer tank (4), the hot end (51) is arranged outside the low-temperature liquid buffer tank (4), and the refrigerating device (5) is connected with the low-temperature liquid buffer tank (4) in a welding or flange mode.

4. An LNG container according to claim 1, characterized in that: the gas inlet pipe (9) and the liquid return pipe (10) are stainless steel straight pipes or low-temperature hoses.

5. An LNG container according to claim 1, characterized in that: the gas inlet pipe (9) is connected between the upper evacuation safety valve (8) on the upper portion of the LNG storage tank (2) and the top end or the upper end of the cryogenic liquid buffer tank (4), the liquid return pipe (10) is connected between the unloading device at the bottom end of the LNG storage tank (2) and the bottom end of the cryogenic liquid buffer tank (4), and the connection mode is flange or welded connection.

6. An LNG container according to claim 1, characterized in that: low temperature liquid buffer tank (4) internally mounted has aluminium system heating panel (7), aluminium system heating panel (7) are connected with cold junction (52) of refrigerating plant (5), aluminium system heating panel (7) are the netted fretwork heating panel of ripple, aluminium system heating panel (7) border position is provided with the stainless steel support frame.

7. An LNG container according to claim 1, characterized in that: and a solar panel (3) is also arranged on the container frame (1).

8. An LNG container according to claim 1, characterized in that: the low-temperature liquid buffer tank (4) is a heat-insulation low-temperature container, and the heat insulation mode is vacuum heat insulation.

9. An LNG container according to claim 1, characterized in that: and a heat radiating device (6) is connected to the hot end (51) of the refrigerating device (5).