CN205026393U - LNG storage device - Google Patents
LNG storage device Download PDFInfo
- Publication number
- CN205026393U CN205026393U CN201520679384.4U CN201520679384U CN205026393U CN 205026393 U CN205026393 U CN 205026393U CN 201520679384 U CN201520679384 U CN 201520679384U CN 205026393 U CN205026393 U CN 205026393U
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- tank body
- pipeline
- valve
- interior
- outer tank
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Abstract
The utility model discloses a LNG storage device, including the three -layer jar body, from inside to outside in proper order for the inner tank body, outer jar of body of the outer jar first body and second, the inner tank body and function is in storing liquefied natural gas, is provided with inclosed vacuum heat insulating laminated between the inner tank body and the first outer jar body, also is provided with inclosed vacuum heat insulating laminated between the jar is personally experienced sth. Part of the body outside the outer jar of first body and the second, it is provided with two manometers, through two internal pressure condition of manometer real -time supervision inner tank, plays the effect of dual fail -safe, set up two gas vents, play the effect of dual fail -safe, be provided with vacuum test and controlling means to guarantee the interbedded vacuum nature of insulating against heat, prevent that the inner tank body is heated increased pressure and produces dangerously, be provided with liquid circulation pipeline, prevent to produce vortex phenomenon, still be provided with insert gas inlet.
Description
Technical field
The utility model belongs to LNG Liquefied natural gas and transports technical field safely, relates in particular to a kind of LNG storage device.
Background technique
Rock gas is inflammable and explosive fuel, rock gas will be liquefied as LNG Liquefied natural gas LNG (LiquefiedNaturalGas) through ultralow temperature (-162 DEG C) normal pressure when storing transport, the very end and the danger of easily blasting and fill at it and store in transportation process and all there is not the certain potential safety hazard of person of the storage temperature of LNG, this just just proposes safe and reliable strict demand to its storage facilities and means of transportation.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of safe and reliable LNG storage device.
The utility model realizes by the following technical solutions:
A kind of LNG storage device comprises three layers of tank body, be followed successively by interior tank body, the first outer tank body and the second outer tank body from inside to outside, interior tank body is for storing LNG Liquefied natural gas, be provided with airtight vacuum heat-insulation interlayer between interior tank body and the first outer tank body, between the first outer tank body and the second outer tank body, be also provided with airtight vacuum heat-insulation interlayer;
Interior tank body has liquid entrance by install pipeline, and on pipeline, arrange the first valve,
The top of interior tank interior is provided with venting gas appliance, venting gas appliance is connected with relief opening for subsequent use with relief opening respectively by one-to-two pipeline, and on the main pipeline of one-to-two pipeline, be provided with the first pressure gauge and the second pressure gauge, the subtube of the one-to-two pipeline be connected with relief opening at venting gas appliance is provided with the second valve, the subtube of the one-to-two pipeline be connected with relief opening for subsequent use at venting gas appliance is provided with the second valve for subsequent use;
The bottom of interior tank interior is provided with inert gas uniform distributor, and inert gas uniform distributor is connected by pipeline with inert gas import, and the pipeline be connected with inert gas import at inert gas uniform distributor is provided with the 3rd valve;
Vacuum heat-insulation interlayer between interior tank body and the first outer tank body has vacuumizing and exhausting mouth by install pipeline, and on pipeline, be disposed with vacuum degree measurement sensor, the 4th valve and vacuum pump;
Liquid circulation lines is provided with in vacuum heat-insulation interlayer between interior tank body and the first outer tank body, the circulation import of liquid circulation lines is arranged on the bottom of interior tank body, the loop exit of liquid circulation lines is arranged on the top of interior tank body, and liquid circulation lines sets gradually the 5th valve and recycle pump along circulation import to loop exit.
In technique scheme, the left end of the second outer tank body is provided with level gauging pipeline, second outer tank body of passing suitable for reading of level gauging pipeline is connected with the top of the first outer tank body with interior tank body, the end opening of level gauging pipeline is connected with the bottom of the first outer tank body with interior tank body through the second outer tank body, and level gauging pipeline is disposed with the 6th valve, level meter and the 7th valve along suitable for reading to end opening.
Advantage of the present utility model and beneficial effect are:
By tank body internal pressure situation in the first pressure gauge and the second pressure gauge Real-Time Monitoring, control the second valve or the second valve unlatching (opening the second valve for subsequent use when the second valve goes wrong) for subsequent use when pressure is excessive, internal tank interior is carried out exitting the pressure reduced in interior tank body and is prevented pressure increase and blast; Adopt the first pressure gauge and the second pressure gauge to carry out monitoring can prevent because one of them pressure gauge is malfunctioning and cause potential safety hazard simultaneously, thus add the validity of pressure monitoring, play the effect of dual fail-safe.Simultaneously, adopt by relief opening and relief opening for subsequent use and control the double-exhaust hierarchy of control design that its each self-purging second valve and the second valve for subsequent use form, the valve because of one of them relief opening can be prevented equally malfunctioning and cause potential safety hazard, thus add the validity of exhaust, play dual fail-safe effect equally.
When carrying out the canned work of rock gas (especially first canned or when there is more air in interior tank body), in inner storage tank, inert gas is filled with by inert gas import and inert gas uniform distributor, and by venting gas appliance, the air in inner storage tank is discharged from relief opening, with the requirement making the content in the gas in interior tank body reach safe, prevent air and rock gas mixing from causing danger.
By the degree of vacuum in vacuum degree measurement sensor Real-Time Monitoring vacuum heat-insulation interlayer, when degree of vacuum declines, (vacuum heat-insulation interlayer can not be completely airtight, its degree of vacuum can slowly decline under normal circumstances), 4th valve is opened vacuum pump work simultaneously and is vacuumized, thus ensure the vacuum heat-insulation of vacuum heat-insulation interlayer, prevent interior tank body thermal stress from increasing and produce danger.
The LNG Liquefied natural gas repeatedly filled in interior tank body can be made fully to mix by ON cycle pump and the 5th valve, prevent that vortex phenomenon (in LNG Storage, Transport process, a kind of non-stability phenomenon being known as vortex can occur.Vortex is owing to filling new LNG liquid in the low temperature storing tank that LNG is housed, or makes the liquid generation layering in storage tank due to the nitrogen preferential evaporation in LNG.Each layer liquid after layering, under storage tank perisporium leaks the heating of heat, forms separately independently natural convection circulation.This circulation makes the density of each layer liquid constantly change, and when the density approximately equal of adjacent two layers liquid, strong mixing will occur two liquid layers, thus it is accidents caused to cause LNG Liquefied natural gas overheated in storage tank to evaporate in a large number).
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein: G-1 is interior tank body, G-2 is the first outer tank body, G-3 is the second outer tank body, a is venting gas appliance, b is inert gas uniform distributor, K1 is liquid entrance, K2 is relief opening, K2-1 is relief opening for subsequent use, K3 is inert gas import, K4 is vacuumizing and exhausting mouth, L1 is liquid circulation lines, L2 is level gauging pipeline, P1 is the first pressure gauge, P2 is the second pressure gauge, R is vacuum degree measurement sensor, LG is level meter, D1 is vacuum pump, D2 is recycle pump, V1 is the first valve, V2 is the second valve, V2-1 is the second valve for subsequent use, V3 is the 3rd valve, V4 is the 4th valve, V5 is the 5th valve, V6 is the 6th valve, V7 is the 7th valve.
Embodiment
The technical solution of the utility model is further illustrated below in conjunction with specific embodiment.
As shown in Figure 1, a kind of LNG storage device involved by the utility model comprises three layers of tank body, be followed successively by interior tank body G-1 from inside to outside, first outer tank body G-2 and the second outer tank body G-3, interior tank body is for storing LNG Liquefied natural gas, airtight vacuum heat-insulation interlayer is provided with between interior tank body G-1 and the first outer tank body G-2, also airtight vacuum heat-insulation interlayer is provided with between first outer tank body G-2 and the second outer tank body G-3, the LNG Liquefied natural gas of interior tank interior and the heat insulation of the external world is realized by two-layer vacuum heat-insulation interlayer, the danger of blasting to avoid LNG Liquefied natural gas Yin Wendu rising vaporization to cause the pressure increase of interior tank body, compare traditional one deck vacuum heat-insulation interlayer, the utility model has more Security.
Interior tank body G-1 has liquid entrance K1 by install pipeline, and on pipeline, arrange the first valve V1, completes the canned of LNG Liquefied natural gas and discharging operation by liquid entrance K1, and the first valve V1 controls the opening and closing state of liquid entrance K1.
The top of interior tank body G-1 inside is provided with venting gas appliance a, venting gas appliance a is connected with relief opening K2-1 for subsequent use with relief opening K2 respectively by one-to-two pipeline, and on the main pipeline of one-to-two pipeline, be provided with the first pressure gauge P1 and the second pressure gauge P2, the subtube of the one-to-two pipeline be connected with relief opening K2 at venting gas appliance a is provided with the second valve V2, the subtube of the one-to-two pipeline be connected with relief opening K2-1 for subsequent use at venting gas appliance a is provided with the second valve V2-1 for subsequent use; Tank body G-1 internal pressure situation in first pressure gauge P1 and the second pressure gauge P2 Real-Time Monitoring, control the second valve V2 or the second valve V2 unlatching (opening the second valve V2 for subsequent use when the second valve V2 goes wrong) for subsequent use when pressure is excessive, internal tank body G-1 inside is carried out exitting the pressure reduced in interior tank body and is prevented pressure increase and blast; Adopt the first pressure gauge P1 and the second pressure gauge P2 to carry out monitoring can prevent because one of them pressure gauge is malfunctioning and cause potential safety hazard simultaneously, thus add the validity of pressure monitoring, play the effect of dual fail-safe.Simultaneously, adopt by relief opening K2 and relief opening K2-1 for subsequent use and control the double-exhaust hierarchy of control design that its each self-purging second valve V2 and the second valve V2-1 for subsequent use form, the valve because of one of them relief opening can be prevented equally malfunctioning and cause potential safety hazard, thus add the validity of exhaust, play dual fail-safe effect equally.
The bottom of interior tank body G-1 inside is provided with inert gas uniform distributor b, inert gas uniform distributor b is connected by pipeline with inert gas import K3, and the pipeline be connected with inert gas import K3 at inert gas uniform distributor b is provided with the 3rd valve V3; When carrying out the canned work of rock gas (especially first canned or when there is more air in interior tank body), in order to ensure safety, in inner storage tank, inert gas is filled with by inert gas import K3 and inert gas uniform distributor b, and by venting gas appliance a, the air in inner storage tank is discharged from relief opening K2, with the requirement making the content in the gas in interior tank body reach safe, prevent air and rock gas mixing from causing danger.
Vacuum heat-insulation interlayer between interior tank body G-1 and the first outer tank body G-2 has vacuumizing and exhausting mouth K4 by install pipeline, and on pipeline, be disposed with vacuum degree measurement sensor R, the 4th valve V4 and vacuum pump D1; By the degree of vacuum in vacuum degree measurement sensor R Real-Time Monitoring interlayer, when degree of vacuum declines, (between interior tank body G-1 and outer tank body G-2, interlayer can not be completely airtight, its degree of vacuum can slowly decline under normal circumstances), 4th valve V4 opens vacuum pump D1 work simultaneously and vacuumizes, thus ensure the vacuum heat-insulation of interlayer, prevent interior tank body thermal stress from increasing and produce danger.
Liquid circulation lines L1 is provided with in vacuum heat-insulation interlayer between interior tank body G-1 and the first outer tank body G-2, the circulation import of liquid circulation lines L1 is arranged on the bottom of interior tank body G-1, the loop exit of liquid circulation lines L1 is arranged on the top of interior tank body G-1, and liquid circulation lines L1 sets gradually the 5th valve V5 and recycle pump D2 along circulation import to loop exit; The LNG Liquefied natural gas repeatedly filled in interior tank body can be made fully to mix by ON cycle pump D2 and the 5th valve V5, prevent that vortex phenomenon (in LNG Storage, Transport process, a kind of non-stability phenomenon being known as vortex can occur.Vortex is owing to filling new LNG liquid in the low temperature storing tank that LNG is housed, or makes the liquid generation layering in storage tank due to the nitrogen preferential evaporation in LNG.Each layer liquid after layering, under storage tank perisporium leaks the heating of heat, forms separately independently natural convection circulation.This circulation makes the density of each layer liquid constantly change, and when the density approximately equal of adjacent two layers liquid, strong mixing will occur two liquid layers, thus it is accidents caused to cause LNG Liquefied natural gas overheated in storage tank to evaporate in a large number).
The left end of the second outer tank body G-3 is provided with level gauging pipeline L2, the second outer tank body G-3 that passes suitable for reading of level gauging pipeline L2 is connected with the top of interior tank body G-1 with the first outer tank body G-2, the end opening of level gauging pipeline L2 is connected with the bottom of interior tank body G-1 with the first outer tank body G-2 through the second outer tank body G-3, and level gauging pipeline is disposed with the 6th valve V6, level meter LG and the 7th valve V7 along suitable for reading to end opening; Liquid level in being detected by level meter LG in tank body.
Above exemplary description is done to the utility model; should be noted that; when not departing from core of the present utility model, any simple distortion, amendment or other those skilled in the art can not spend the equivalent replacement of creative work all to fall into protection domain of the present utility model.
Claims (2)
1. a LNG storage device, it is characterized in that: comprise three layers of tank body, be followed successively by interior tank body, the first outer tank body and the second outer tank body from inside to outside, be provided with airtight vacuum heat-insulation interlayer between interior tank body and the first outer tank body, between the first outer tank body and the second outer tank body, be also provided with airtight vacuum heat-insulation interlayer;
Interior tank body has liquid entrance by install pipeline, and on pipeline, arrange the first valve;
The top of interior tank interior is provided with venting gas appliance, venting gas appliance is connected with relief opening for subsequent use with relief opening respectively by one-to-two pipeline, and on the main pipeline of one-to-two pipeline, be provided with the first pressure gauge and the second pressure gauge, the subtube of the one-to-two pipeline be connected with relief opening at venting gas appliance is provided with the second valve, the subtube of the one-to-two pipeline be connected with relief opening for subsequent use at venting gas appliance is provided with the second valve for subsequent use;
The bottom of interior tank interior is provided with inert gas uniform distributor, and inert gas uniform distributor is connected by pipeline with inert gas import, and the pipeline be connected with inert gas import at inert gas uniform distributor is provided with the 3rd valve;
Vacuum heat-insulation interlayer between interior tank body and the first outer tank body has vacuumizing and exhausting mouth by install pipeline, and on pipeline, be disposed with vacuum degree measurement sensor, the 4th valve and vacuum pump;
Liquid circulation lines is provided with in vacuum heat-insulation interlayer between interior tank body and the first outer tank body, the circulation import of liquid circulation lines is arranged on the bottom of interior tank body, the loop exit of liquid circulation lines is arranged on the top of interior tank body, and liquid circulation lines sets gradually the 5th valve and recycle pump along circulation import to loop exit.
2. a kind of LNG storage device according to claim 1, it is characterized in that: the left end of the second outer tank body is provided with level gauging pipeline, second outer tank body of passing suitable for reading of level gauging pipeline is connected with the top of the first outer tank body with interior tank body, the end opening of level gauging pipeline is connected with the bottom of the first outer tank body with interior tank body through the second outer tank body, and level gauging pipeline is disposed with the 6th valve, level meter and the 7th valve along suitable for reading to end opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520679384.4U CN205026393U (en) | 2015-09-06 | 2015-09-06 | LNG storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520679384.4U CN205026393U (en) | 2015-09-06 | 2015-09-06 | LNG storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205026393U true CN205026393U (en) | 2016-02-10 |
Family
ID=55258923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520679384.4U Expired - Fee Related CN205026393U (en) | 2015-09-06 | 2015-09-06 | LNG storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205026393U (en) |
-
2015
- 2015-09-06 CN CN201520679384.4U patent/CN205026393U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160210 Termination date: 20160906 |