CN2400677Y

CN2400677Y - Self-cooling liquefied natural gas tank

Info

Publication number: CN2400677Y
Application number: CN 99251191
Authority: CN
Inventors: 张孔明; 叶勇; 王彦超; 张笑波; 杨杰峰; 赵春红; 蒋向阳
Original assignee: ZHONGYUAN PETROLEUM EXPLORATION DEP
Current assignee: ZHONGYUAN PETROLEUM EXPLORATION DEP
Priority date: 1999-10-30
Filing date: 1999-10-30
Publication date: 2000-10-11
Anticipated expiration: 2009-10-30

Abstract

The utility model discloses a self-cooling liquefied natural gas storage tank, which is composed of an outer shell and an inner shell, wherein, the inner shell is matched with filling device of liquefied natural gas and a withdrawing device for the liquefied natural gas; cold insulation materials are filed between the inner shell and the outer shell; a blowout preventer is arranged in the outer shell, a safety valve is arranged on the inner shell, and a metal container is arranged in the inner shell; a pipeline is arranged on the metal container, and is extended out of the storage tank, and an outlet of the pipeline is provided with a safety valve and a replenishing valve which are directly communicated with outside atmosphere. Compared with similar products at home and abroad, the utility model has the advantages of little evaporation loss, safety, etc.

Description

A kind of self-cooled liquefied natural gas (LNG) tank

The utility model relates to a kind of liquefied natural gas (LNG) tank, belongs to the LNG Liquefied natural gas warehousing and transportation facilities.

At present LNG Liquefied natural gas is used widely in fields such as industry, domestic fuel, automobiles as a kind of clean fuel, so the storage of LNG Liquefied natural gas and transportation become the matter of utmost importance that needs solution.The equal open question of liquefied natural gas (LNG) tank is because importing into of external heat causes the evaporating loss of a part of LNG Liquefied natural gas both at home and abroad at present, and the potential safety hazard of bringing thus.

The purpose of this utility model just provides a kind of self-cooled liquefied natural gas (LNG) tank.

The purpose of this utility model is achieved in that it is made up of shell and inner casing, inner casing is furnished with LNG Liquefied natural gas charging device and withdrawing device, be filled with cold insulation material between the inside and outside shell, on shell, be provided with explosion-proof device, on inner casing, be provided with safety valve, in inner casing, be provided with canister, have pipeline to stretch out outside the storage tank on the canister, safety valve and liquid-filling valve are equipped with in the outlet of pipeline, and safety valve and liquid-filling valve directly communicate with ambient atmosphere.

Compare with similar products at home and abroad, the utlity model has advantages such as evaporating loss is little, safe and reliable.

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1: self-cooled liquefied natural gas (LNG) tank structural representation;

Among the figure: 1-shell, 2-inner casing, 3-cold insulation material, 4-explosion-proof device, 5-safety valve,

6-liquid-filling valve, 7-safety valve, 8-charging device, 9-pipeline, 10-withdrawing device,

The 11-canister;

The self-cooled liquefied natural gas (LNG) tank is made up of shell 1, inner casing 2, canister 11, and inner casing 2 is furnished with LNG Liquefied natural gas charging device 8 and withdrawing device 10, is filled with cold insulation material 3 between inside and outside shell 1,2.On shell 1, be provided with explosion-proof device 4, on inner casing 2, be provided with safety valve 5.Canister 11 has pipeline 9 to stretch out outside the storage tank, and safety valve 7 and liquid-filling valve 6 are equipped with in the outlet of pipeline 9, and safety valve 7 and liquid-filling valve 6 directly communicate with ambient atmosphere.

When the self-cooled liquefied natural gas (LNG) tank is used, the LNG Liquefied natural gas of uniform temperature, pressure is housed in interior jar 2, a certain amount of nonpoisonous and tasteless cryogenic liquide (as liquefied air or liquefaction nitrogen etc.) is housed in the canister 11 (as aluminium matter spheroid), and filling of this cryogenic liquide can realize by liquid-filling valve 6.The storage temperature of this cryogenic liquide is identical with LNG Liquefied natural gas, and pressure store is the saturation pressure under this cryogenic liquide.The setting pressure of safety valve 7 is than this saturation pressure high slightly (for example be this saturation pressure 1.05 times).Liquefied natural gas (LNG) tank is when storing LNG Liquefied natural gas, and owing to importing into of external heat, the temperature of LNG Liquefied natural gas slowly raises, and the cryogenic liquide in the canister 11 is along with rising, and its saturation pressure also raises simultaneously.When saturation pressure rises to setting pressure above safety valve 7, safety valve 7 take-offs, the cryogenic liquide pressure in the canister 11 reduce, and during saturation pressure under being lower than this temperature, for keeping balance, liquid evaporation are arranged then.Temperature reduces behind the liquid evaporation, has reduced the temperature of LNG Liquefied natural gas, makes it to maintain within the certain temperature range, guarantees safety valve 5 not take-offs, has guaranteed that LNG Liquefied natural gas do not have evaporating loss.

Claims

1, a kind of self-cooled liquefied natural gas (LNG) tank is made up of shell (1) and inner casing (2), inner casing (2) is furnished with LNG Liquefied natural gas charging device (8) and withdrawing device (10), outward, inner casing (1), (2) be filled with cold insulation material (3) between, on shell (1), be provided with explosion-proof device (4), on inner casing (2), be provided with safety valve (5), it is characterized in that: in inner casing (2), be provided with canister (11), there is pipeline (9) to stretch out outside the storage tank on the canister (11), safety valve (7) and liquid-filling valve (6) are equipped with in the outlet of pipeline (9), and safety valve (7) and liquid-filling valve (6) directly communicate with ambient atmosphere.