CN106499940A - A kind of high insulation protected against explosion liquefied natural gas storage tank - Google Patents
A kind of high insulation protected against explosion liquefied natural gas storage tank Download PDFInfo
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- CN106499940A CN106499940A CN201510555415.XA CN201510555415A CN106499940A CN 106499940 A CN106499940 A CN 106499940A CN 201510555415 A CN201510555415 A CN 201510555415A CN 106499940 A CN106499940 A CN 106499940A
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- tank body
- interior
- pipeline
- outer tank
- vacuum
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Abstract
The invention discloses a kind of high insulation protected against explosion liquefied natural gas storage tank, 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；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, a kind of high insulation protected against explosion liquefaction day is related in particular to
Right 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 high insulation protected against explosion liquefied natural gas storage tank.
The present invention employs the following technical solutions to realize：
A kind of high insulation protected against explosion liquefied natural gas storage tank, including three layers of tank body, be followed successively by from inside to outside interior tank body, the
One 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, the first outer tank body
And second be 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, and exhaust apparatus is connected by pipeline with air vent, and in aerofluxuss
The second valve and first pressure table and second pressure table is provided with air vent on the pipeline that device is connected；
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 is opened internal tank interior and is deflated and prevents pressure increase and explode to reduce the pressure in inner canister body；Using
One pressure gauge and second pressure table are monitored simultaneously and can prevent 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.
(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 K3 is inert gas import, and K4 is to take out
Vaccum exhaust outlet, L1 are liquid circulation lines, and P1 is first pressure table, and P2 is second pressure table, and R is that vacuum is examined
Sensor is surveyed, D1 is vacuum pump, D2 is circulating pump, V1 is the first valve, V2 is the second valve, V3 is the 3rd valve, V4
For the 4th valve, V5 is the 5th valve.
Specific embodiment
Technical scheme is further illustrated with reference to specific embodiment.
As shown in Figure 1, the high insulation protected against explosion liquefied natural gas storage tank of one kind involved in the present invention, which includes three layers
Tank body, is followed successively by interior tank body G-1, the first outer tank body G-2 and the second outer tank body G-3 from inside to outside, and interior tank body is used for storing
Liquefied 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 be vacuum-powders insulation interlayer between outer tank body G-3, the liquid of interior tank interior is realized by two-layer insulating sandwich
Change natural gas is heat-insulated with the external world, to avoid liquefied natural gas from sending out because temperature rising vaporization causes the pressure of interior tank body to increase
The danger of raw blast, compares traditional monolayer vacuum heat-insulation interlayer, and 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, and exhaust apparatus a is connected by pipeline with air vent K2,
And the second valve V2 and first pressure table P1 and second is provided with air vent K2 on the pipeline that exhaust apparatus a is connected
Pressure gauge P2；Pressure condition in tank body G-1 in first pressure table P1 and second pressure table P2 real-time monitorings, when pressure mistake
Controlling to be deflated inside the internal tank body G-1 of the second valve V2 unlatchings when big prevent pressure from increasing to reduce the pressure in inner canister body
Explode greatly；Being monitored using first pressure table P1 and second pressure table P2 simultaneously can prevent because of one of them
Pressure gauge failure and cause potential safety hazard, so as to increased the effectiveness of pressure monitoring, play a part of dual fail-safe.
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 height is incubated protected against explosion liquefied natural gas storage tank, it is characterised in that：Including three layers of tank body, from inside to outside according to
Secondary for interior tank body, the first outer tank body and the second outer tank body, be closed vacuum heat-insulation folder between interior tank body and the first outer tank body
Layer, is vacuum-powders insulation interlayer between the 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, and exhaust apparatus is connected by pipeline with air vent, and in aerofluxuss
The second valve and first pressure table and second pressure table is provided with air vent on the pipeline that device is connected；
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 |
|---|---|---|---|
| CN201510555415.XA CN106499940A (en) | 2015-09-06 | 2015-09-06 | A kind of high insulation protected against explosion liquefied natural gas storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510555415.XA CN106499940A (en) | 2015-09-06 | 2015-09-06 | A kind of high insulation protected against explosion liquefied natural gas storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106499940A true CN106499940A (en) | 2017-03-15 |
Family
ID=58287148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510555415.XA Pending CN106499940A (en) | 2015-09-06 | 2015-09-06 | A kind of high insulation protected against explosion liquefied natural gas storage tank |
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|---|---|
| CN (1) | CN106499940A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082090A (en) * | 2019-09-18 | 2020-12-15 | 朴成浩 | Leakage detection and explosion-proof heat preservation device for ultralow-temperature liquefied gas storage tank |
-
2015
- 2015-09-06 CN CN201510555415.XA patent/CN106499940A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082090A (en) * | 2019-09-18 | 2020-12-15 | 朴成浩 | Leakage detection and explosion-proof heat preservation device for ultralow-temperature liquefied gas storage tank |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170315 |
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| WD01 | Invention patent application deemed withdrawn after publication |