CN106499942A - For storing the storage tank of liquefied natural gas - Google Patents
For storing the storage tank of liquefied natural gas Download PDFInfo
- Publication number
- CN106499942A CN106499942A CN201510556888.1A CN201510556888A CN106499942A CN 106499942 A CN106499942 A CN 106499942A CN 201510556888 A CN201510556888 A CN 201510556888A CN 106499942 A CN106499942 A CN 106499942A
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- Prior art keywords
- tank body
- pipeline
- interior
- valve
- outer tank
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Abstract
The invention discloses a kind of storage tank for storing liquefied natural gas, including three layers of tank body, interior tank body, first outer tank body and second outer tank body are followed successively by from inside to outside, interior tank body is used for storing liquefied natural gas, it is closed vacuum heat-insulation interlayer between interior tank body and the first outer tank body, is vacuum-powders insulation interlayer between the first outer tank body and the second outer tank body；Which is provided with two pressure gauges, by pressure condition in two pressure gauge real-time monitoring inner canister bodies, plays a part of dual fail-safe；Two air vents are set, play a part of dual fail-safe；Vacuum detecting and control device is provided with, so as to ensure the vacuum heat-insulation of interlayer, prevents interior tank body thermal stress increase from producing dangerous；Liquid circulation line is provided with, vortex phenomenon is prevented；It is additionally provided with inert gas import.
Description
Technical field
The invention belongs to technical field transported safely by liquefied natural gas, relating in particular to one kind is used for storing liquefied natural gas
Storage tank.
Background technology
Natural gas is inflammable and explosive fuel, and natural gas will be liquefied as through ultralow temperature (- 162 DEG C) normal pressure in storage transport
Liquefied natural gas LNG (Liquefied Natural Gas), the storage temperature very bottom of LNG and the danger for being susceptible to explode
And there is no the certain potential safety hazard of person in its filling and storage transportation, this is just to its storage facilities and means of transport
Safe and reliable strict demand is just proposed.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, there is provided a kind of storage tank for storing liquefied natural gas.
The present invention employs the following technical solutions to realize：
A kind of storage tank for storing liquefied natural gas includes three layers of tank body, is followed successively by interior tank body, the first outer tank from inside to outside
Body and the second outer tank body, are closed vacuum heat-insulation interlayer between interior tank body and the first outer tank body, the first outer tank body and second
It is vacuum-powders insulation interlayer between outer tank body；
Interior tank body is provided with liquid entrance by pipeline, and arranges the first valve on pipeline；
The top of interior tank interior is provided with exhaust apparatus, exhaust apparatus by one-to-two pipeline respectively with air vent and standby
Air vent is connected, and is provided with first pressure table and second pressure table on the main pipeline of one-to-two pipeline, fills in aerofluxuss
The second valve is provided with the subtube for putting the one-to-two pipeline being connected with air vent, is connected with standby air vent in exhaust apparatus
One-to-two pipeline subtube on be provided with standby second valve；
The bottom of interior tank interior is provided with noble gases uniform distributor, and noble gases uniform distributor is entered with noble gases
Mouth is connected by pipeline, and on the pipeline that noble gases uniform distributor is connected with inert gas import is provided with the 3rd
Valve；
Vacuum heat-insulation interlayer between interior tank body and the first outer tank body is provided with vacuumizing and exhausting mouth by pipeline, and in pipeline
On be disposed with vacuum degree measurement sensor, the 4th valve and vacuum pump；
Liquid circulation lines, liquid circulation lines are provided with vacuum heat-insulation interlayer between interior tank body and the first outer tank body
Circulation import be arranged on the bottom of interior tank body, the loop exit of liquid circulation lines is arranged on the top of interior tank body, liquid
The 5th valve and circulating pump are set gradually along circulation import to loop exit on circulating line.
The advantages of the present invention are：
By pressure condition in first pressure table and second pressure table real-time monitoring inner canister body, second is controlled when pressure is excessive
Valve or standby second valve open (opening standby second valve when the second valve goes wrong), and internal tank interior is put
Gas with reduce the pressure in inner canister body prevent pressure increase and explode；Using first pressure table and second pressure table simultaneously
Being monitored can prevent from causing potential safety hazard because of one of pressure gauge failure, so as to increased the effective of pressure monitoring
Property, play a part of dual fail-safe.Meanwhile, using by air vent and standby air vent and control its each self-purging second
Valve and standby second valve group into double-exhaust control system design, can equally prevent the valve failure because of one of air vent
And potential safety hazard is caused, so as to increased the effectiveness of aerofluxuss, equally play dual fail-safe effect.
(the situation that is especially canned first or there is more air in interior tank body when the canned work of natural gas is carried out
Under), noble gases are filled with into inner storage tank by inert gas import and noble gases uniform distributor, and pass through aerofluxuss
Air in inner storage tank is discharged by device from air vent, so that the content in the gas in inner canister body reaches safe requirement,
Prevent air and natural gas mixing from causing danger.
By the vacuum in vacuum degree measurement sensor real-time monitoring vacuum heat-insulation the interlayer, (vacuum when vacuum declines
Insulating sandwich can not possibly be completely closed, and its vacuum slowly can decline under normal circumstances), vacuum pump simultaneously opened by the 4th valve
Work carries out evacuation, so as to ensure the vacuum heat-insulation of vacuum heat-insulation interlayer, prevents interior tank body thermal stress increase from producing
Dangerous.
The liquefied natural gas of the multiple filling in inner canister body can be made to be sufficiently mixed uniformly by open the circulation pump and the 5th valve,
Prevent vortex phenomenon (during LNG Storage, Transport, it may occur that a kind of non-stability phenomenon for being known as being vortexed.Whirlpool
Rotation be due to filling new LNG liquid in the low temperature storing tank for have been loaded with LNG, or due to LNG in nitrogen preferential evaporation
And it is layered the liquid in storage tank.Each layer liquid after layering is formed each solely under the heating that storage tank perisporium leaks heat
Vertical free convection circulation.The circulation makes the density of each layer liquid constantly change, when the density of adjacent two layers liquid near
During patibhaga-nimitta etc., two liquid layers will occur strong mixing, and so as to cause overheated liquefied natural gas in storage tank, evaporation is drawn in a large number
The accident of sending out).
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Wherein：G-1 is interior tank body, and G-2 is the first outer tank body, and G-3 is the second outer tank body, and a is exhaust apparatus, and b is
Noble gases uniform distributor, K1 are liquid entrance, and K2 is air vent, and K2-1 is standby air vent, and K3 is inertia
Gas feed, K4 are vacuumizing and exhausting mouth, and L1 is liquid circulation lines, and P1 is first pressure table, and P2 is second pressure
Table, R are vacuum degree measurement sensor, and D1 is vacuum pump, and D2 is circulating pump, and V1 is the first valve, and V2 is the second valve,
V2-1 is standby second valve, and V3 is the 3rd valve, and V4 is the 4th valve, and V5 is the 5th valve.
Specific embodiment
Technical scheme is further illustrated with reference to specific embodiment.
As shown in Figure 1, a kind of storage tank for storing liquefied natural gas involved in the present invention includes three layers of tank body, from
Interior be followed successively by interior tank body G-1, the first outer tank body G-2 and the second outer tank body G-3 to outward, interior tank body is used for storing liquefaction natural
Gas, is closed vacuum heat-insulation interlayer between interior tank body G-1 and the first outer tank body G-2, the first outer tank body G-2 and second
It is vacuum-powders insulation interlayer between outer tank body G-3, realizes that by two-layer insulating sandwich the liquefaction of interior tank interior is natural
Gas is heat-insulated with the external world, to avoid liquefied natural gas from exploding because temperature rising vaporization causes the pressure of interior tank body to increase
Danger, compare traditional monolayer vacuum heat-insulation interlayer, the present invention has more safety.
Interior tank body G-1 is provided with liquid entrance K1 by pipeline, and arranges the first valve V1 on pipeline, by liquid
Import and export K1 and complete the canned and discharging operation to liquefied natural gas, the first valve V1 controls the unlatching of liquid entrance K1
And closed mode.
Top inside interior tank body G-1 is provided with exhaust apparatus a, exhaust apparatus a by one-to-two pipeline respectively with air vent
K2 is connected with standby air vent K2-1, and is provided with first pressure table P1 and second on the main pipeline of one-to-two pipeline
Pressure gauge P2, is provided with the second valve V2 with air vent K2 on the subtube of the one-to-two pipeline being connected in exhaust apparatus a,
Standby second valve V2-1 is provided with standby air vent K2-1 on the subtube of the one-to-two pipeline being connected in exhaust apparatus a；
Pressure condition in tank body G-1 in first pressure table P1 and second pressure table P2 real-time monitorings, the control the when pressure is excessive
Two valve V2 or standby second valve V2 open (opening standby second valve V2 when the second valve V2 goes wrong), internally
Deflated inside tank body G-1 with reduce the pressure in inner canister body prevent pressure increase and explode；Using first pressure
Table P1 and second pressure table P2 is monitored simultaneously can be prevented from causing potential safety hazard because of one of pressure gauge failure,
So as to increased the effectiveness of pressure monitoring, play a part of dual fail-safe.Meanwhile, using by air vent K2 and standby aerofluxuss
Mouthful K2-1 and control the double-exhaust control system of its each self-purging second valve V2 and standby second valve V2-1 compositions and set
Meter, can equally prevent from causing potential safety hazard because of the valve failure of one of air vent, so as to increased the effective of aerofluxuss
Property, equally play dual fail-safe effect.
Bottom inside interior tank body G-1 is provided with noble gases uniform distributor b, noble gases uniform distributor b with lazy
Property gas feed K3 is connected by pipeline, and be connected with inert gas import K3 in noble gases uniform distributor b
The 3rd valve V3 is provided with pipeline；It is (especially canned first or in interior tank body when the canned work of natural gas is carried out
In the case of there is more air), in order to ensure safety, by inert gas import K3 and noble gases uniform distributor
B is filled with noble gases into inner storage tank, and discharges the air in inner storage tank from air vent K2 by exhaust apparatus a, with
Make the content in the gas in inner canister body reach safe requirement, prevent air and natural gas mixing from causing danger.
Vacuum heat-insulation interlayer between interior tank body G-1 and the first outer tank body G-2 is provided with vacuumizing and exhausting mouth by pipeline
K4, and vacuum degree measurement sensor R, the 4th valve V4 and vacuum pump D1 is disposed with pipeline；By vacuum
Vacuum in detection sensor R real-time monitoring interlayer, when vacuum declines (interior tank body G-1 and outer tank body G-2 it
Between interlayer can not possibly be completely closed, its vacuum slowly can decline under normal circumstances), the 4th valve V4 opens simultaneously vacuum pump
D1 work carries out evacuation, so as to ensure the vacuum heat-insulation of interlayer, prevents interior tank body thermal stress increase from producing dangerous.
Liquid circulation lines L1, liquid are provided with vacuum heat-insulation interlayer between interior tank body G-1 and the first outer tank body G-2
The circulation import of body circulation pipeline L1 is arranged on the bottom of interior tank body G-1, and the loop exit of liquid circulation lines L1 is arranged
On the top of interior tank body G-1, on liquid circulation lines L1 along circulation import to loop exit set gradually the 5th valve V5 and
Circulating pump D2；The liquefied natural gas that multiple filling in inner canister body can be made by open the circulation pump D2 and the 5th valve V5
It is sufficiently mixed uniform, prevents vortex phenomenon (during LNG Storage, Transport, it may occur that a kind of be known as being vortexed
Non- stability phenomenon.Vortex is due to filling new LNG liquid in the low temperature storing tank for have been loaded with LNG, or due to LNG
In nitrogen preferential evaporation and be layered the liquid in storage tank.Each layer liquid after layering leaks the heating of heat in storage tank perisporium
Under, form each independent free convection circulation.The circulation makes the density of each layer liquid constantly change, when adjacent two
During the density approximately equal of layer liquid, two liquid layers will occur strong mixing, so as to cause overheated liquefaction day in storage tank
So gas evaporates accidents caused in a large number).
Exemplary description has been done to the present invention above, it should explanation, in the case of the core without departing from the present invention,
Any simple deformation, modification or other skilled in the art can not spend the equivalent of creative work to fall
Enter protection scope of the present invention.
Claims (1)
1. a kind of storage tank for storing liquefied natural gas, it is characterised in that：Including three layers of tank body, it is followed successively by from inside to outside
Interior tank body, the first outer tank body and the second outer tank body, are closed vacuum heat-insulation interlayer between interior tank body and the first outer tank body,
It is vacuum-powders insulation interlayer between first outer tank body and the second outer tank body；
Interior tank body is provided with liquid entrance by pipeline, and arranges the first valve on pipeline；
The top of interior tank interior is provided with exhaust apparatus, exhaust apparatus by one-to-two pipeline respectively with air vent and standby
Air vent is connected, and is provided with first pressure table and second pressure table on the main pipeline of one-to-two pipeline, fills in aerofluxuss
The second valve is provided with the subtube for putting the one-to-two pipeline being connected with air vent, is connected with standby air vent in exhaust apparatus
One-to-two pipeline subtube on be provided with standby second valve；
The bottom of interior tank interior is provided with noble gases uniform distributor, and noble gases uniform distributor is entered with noble gases
Mouth is connected by pipeline, and on the pipeline that noble gases uniform distributor is connected with inert gas import is provided with the 3rd
Valve；
Vacuum heat-insulation interlayer between interior tank body and the first outer tank body is provided with vacuumizing and exhausting mouth by pipeline, and in pipeline
On be disposed with vacuum degree measurement sensor, the 4th valve and vacuum pump；
Liquid circulation lines, liquid circulation lines are provided with vacuum heat-insulation interlayer between interior tank body and the first outer tank body
Circulation import be arranged on the bottom of interior tank body, the loop exit of liquid circulation lines is arranged on the top of interior tank body, liquid
The 5th valve and circulating pump are set gradually along circulation import to loop exit on circulating line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556888.1A CN106499942A (en) | 2015-09-06 | 2015-09-06 | For storing the storage tank of liquefied natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556888.1A CN106499942A (en) | 2015-09-06 | 2015-09-06 | For storing the storage tank of liquefied natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106499942A true CN106499942A (en) | 2017-03-15 |
Family
ID=58287461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510556888.1A Pending CN106499942A (en) | 2015-09-06 | 2015-09-06 | For storing the storage tank of liquefied natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106499942A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114390951A (en) * | 2019-09-18 | 2022-04-22 | 李成镐 | Ultrasonic spraying device for preventing change of physical properties of ionized water by cutting off contact with air |
-
2015
- 2015-09-06 CN CN201510556888.1A patent/CN106499942A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114390951A (en) * | 2019-09-18 | 2022-04-22 | 李成镐 | Ultrasonic spraying device for preventing change of physical properties of ionized water by cutting off contact with air |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170315 |
|
| WD01 | Invention patent application deemed withdrawn after publication |