CN106499939A - The explosion-proof LNG of pressure control transports storage tank - Google Patents
The explosion-proof LNG of pressure control transports storage tank Download PDFInfo
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- CN106499939A CN106499939A CN201510555414.5A CN201510555414A CN106499939A CN 106499939 A CN106499939 A CN 106499939A CN 201510555414 A CN201510555414 A CN 201510555414A CN 106499939 A CN106499939 A CN 106499939A
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- tank body
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- interior tank
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Abstract
The invention discloses a kind of explosion-proof LNG of pressure control transports storage tank, including interior tank body and outer tank body, closed vacuum heat-insulation interlayer between interior tank body and outer tank body, is provided with；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 and air vent.
Description
Technical field
The invention belongs to technical field transported safely by liquefied natural gas, a kind of explosion-proof LNG transports storage of pressure control is related in particular to
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 explosion-proof LNG of pressure control transports storage tank.
The present invention employs the following technical solutions to realize：
A kind of explosion-proof LNG transports storage tank of pressure control includes interior tank body and outer tank body, is provided with closed between interior tank body and outer tank body
Vacuum heat-insulation interlayer；
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 by one-to-two pipeline row external with outer tank respectively
QI KOU is connected with standby air vent, and is provided with first pressure table and second pressure table on the main pipeline of one-to-two pipeline,
The second valve is provided with the subtube of the one-to-two pipeline being connected with air vent in exhaust apparatus, in exhaust apparatus and standby row
Standby second valve is provided with the subtube of the one-to-two pipeline that QI KOU is connected；
The bottom of interior tank interior is provided with noble gases uniform distributor, and noble gases uniform distributor is external with outer tank
Inert gas import is connected by pipeline, and on the pipeline that noble gases uniform distributor is connected with inert gas import
It is provided with the 3rd valve；
Vacuum heat-insulation interlayer between interior tank body and outer tank body is provided with vacuumizing and exhausting mouth by pipeline, and on pipeline according to
Secondary it is provided with vacuum degree measurement sensor, the 4th valve and vacuum pump；
It is provided with liquid circulation lines in vacuum heat-insulation interlayer between interior tank body and outer tank body, liquid circulation lines are followed
Ring import is arranged on the bottom of interior tank body, and the loop exit of liquid circulation lines is arranged on the top of interior tank body, liquid circulation
The 5th valve and circulating pump are set gradually along circulation import to loop exit on pipeline.
In above-mentioned technical proposal, outer tank body is provided with relief valve.
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 interlayer, (interior tank body and outer tank when vacuum declines
Between body, interlayer can not possibly be completely closed, and its vacuum slowly can decline under normal circumstances), vacuum simultaneously opened by the 4th valve
Pump work carries out evacuation, so as to ensure the vacuum heat-insulation of 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 outer tank body, and a is exhaust apparatus, and b is noble gases uniform distributor, K1
For liquid entrance, K2 is air vent, and K2-1 is standby air vent, and K3 is inert gas import, and K4 is that evacuation is arranged
QI KOU, L1 are liquid circulation lines, and P1 is first pressure table, and P2 is second pressure table, and R is that vacuum degree measurement is sensed
Device, D1 is vacuum pump, and D2 is circulating pump, and V1 is the first valve, and V2 is the second valve, and V2-1 is standby second valve, V3
For the 3rd valve, V4 is the 4th valve, and V5 is the 5th valve, and S1 is relief valve.
Specific embodiment
Technical scheme is further illustrated with reference to specific embodiment.
As shown in Figure 1, a kind of explosion-proof LNG transports storage tank of pressure control involved in the present invention includes interior tank body G-1 and outer tank
Body G-2, interior tank body are used for storing liquefied natural gas, are provided with closed vacuum between interior tank body G-1 and outer tank body G-2
Insulating sandwich, realizes that by vacuum heat-insulation interlayer the liquefied natural gas of interior tank interior is heat-insulated with the external world, to avoid liquid
Change natural gas, because temperature and raise the danger that vaporization causes the pressure of interior tank body to increase and blast occurs.
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 outer tank body
Outer air vent K2 is connected with standby air vent K2-1, and on the main pipeline of one-to-two pipeline is provided with first pressure
Table P1 and second pressure table P2, is provided with the subtube of the one-to-two pipeline being connected with air vent K2 in exhaust apparatus a
Second valve V2, is provided with the subtube of the one-to-two pipeline being connected with standby air vent K2-1 in exhaust apparatus a standby
Second valve V2-1；In first pressure table P1 and second pressure table P2 real-time monitorings, pressure condition in tank body G-1, works as pressure
The second valve V2 or standby second valve V2 unlatchings are controlled when excessive (opens standby second when the second valve V2 goes wrong
Valve V2), deflated inside internal tank body G-1 with reduce the pressure in inner canister body prevent pressure increase and explode；
Being monitored using first pressure table P1 and second pressure table P2 simultaneously can prevent from making because of one of pressure gauge failure
Into potential safety hazard, so as to increased the effectiveness of pressure monitoring, play a part of dual fail-safe.Meanwhile, using by air vent
K2 and standby air vent K2-1 and control its each self-purging second valve V2 and standby second valve V2-1 composition double
Gas control System Design, can equally prevent from causing potential safety hazard because of the valve failure of one of air vent, so as to increase
The effectiveness of aerofluxuss, equally plays 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 outer
Inert gas import K3 outside tank body is connected by pipeline, and in noble gases uniform distributor b and inert gas import
The 3rd valve V3 is provided with the pipeline that K3 is connected；When the canned work of natural gas is carried out (especially canned first or
In the case of there is more air in interior tank body), 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 by exhaust apparatus a by the air in inner storage tank from air vent
K2 is discharged, so that the content in the gas in inner canister body reaches safe requirement, prevents air and natural gas mixing from endangering
Danger.
Vacuum heat-insulation interlayer between interior tank body G-1 and outer tank body G-2 is provided with vacuumizing and exhausting mouth K4 by pipeline, and
Vacuum degree measurement sensor R, the 4th valve V4 and vacuum pump D1 is disposed with pipeline；Passed by vacuum degree measurement
Vacuum in sensor R real-time monitoring the interlayers, (interlayer between interior tank body G-1 and outer tank body G-2 when vacuum declines
Can not possibly be completely closed, its vacuum slowly can decline under normal circumstances), the 4th valve V4 opens vacuum pump D1 works simultaneously
Evacuation is carried out, so as to ensure the vacuum heat-insulation of interlayer, prevents interior tank body thermal stress increase from producing dangerous.
Liquid circulation lines L1 is provided with vacuum heat-insulation interlayer between interior tank body G-1 and outer tank body G-2, liquid is followed
The circulation import of endless tube road L1 is arranged on the bottom of interior tank body G-1, in the loop exit of liquid circulation lines L1 is arranged on
The top of tank body G-1, sets gradually the 5th valve V5 and circulation along circulation import to loop exit on liquid circulation lines L1
Pump D2；The liquefied natural gas of the multiple filling in inner canister body can be made abundant by open the circulation pump D2 and the 5th valve V5
Mix homogeneously, prevent vortex phenomenon (during LNG Storage, Transport, it may occur that a kind of be known as being vortexed non-steady
Property phenomenon.Vortex 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 be layered the liquid in storage tank.Each layer liquid after layering storage tank perisporium leak heat heating under,
Form each independent free convection circulation.The circulation makes the density of each layer liquid constantly change, when adjacent two layers liquid
During the density approximately equal of body, two liquid layers will occur strong mixing, so as to cause overheated liquefied natural gas in storage tank
Evaporate in a large number accidents caused).
Relief valve S1 is provided with outer tank body G-2.
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 (2)
1. a kind of explosion-proof LNG of pressure control transports storage tank, including interior tank body and outer tank body, arranges between interior tank body and outer tank body
There is closed vacuum heat-insulation interlayer, it is characterised in that：
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 by one-to-two pipeline row external with outer tank respectively
QI KOU is connected with standby air vent, and is provided with first pressure table and second pressure table on the main pipeline of one-to-two pipeline,
The second valve is provided with the subtube of the one-to-two pipeline being connected with air vent in exhaust apparatus, in exhaust apparatus and standby row
Standby second valve is provided with the subtube of the one-to-two pipeline that QI KOU is connected；
The bottom of interior tank interior is provided with noble gases uniform distributor, and noble gases uniform distributor is external with outer tank
Inert gas import is connected by pipeline, and on the pipeline that noble gases uniform distributor is connected with inert gas import
It is provided with the 3rd valve；
Vacuum heat-insulation interlayer between interior tank body and outer tank body is provided with vacuumizing and exhausting mouth by pipeline, and on pipeline according to
Secondary it is provided with vacuum degree measurement sensor, the 4th valve and vacuum pump；
It is provided with liquid circulation lines in vacuum heat-insulation interlayer between interior tank body and outer tank body, liquid circulation lines are followed
Ring import is arranged on the bottom of interior tank body, and the loop exit of liquid circulation lines is arranged on the top of interior tank body, liquid circulation
The 5th valve and circulating pump are set gradually along circulation import to loop exit on pipeline.
2. the explosion-proof LNG of pressure control according to claim 1 transports storage tank, it is characterised in that：Outer tank body is provided with peace
Full valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510555414.5A CN106499939A (en) | 2015-09-06 | 2015-09-06 | The explosion-proof LNG of pressure control transports storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510555414.5A CN106499939A (en) | 2015-09-06 | 2015-09-06 | The explosion-proof LNG of pressure control transports storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106499939A true CN106499939A (en) | 2017-03-15 |
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ID=58287563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510555414.5A Pending CN106499939A (en) | 2015-09-06 | 2015-09-06 | The explosion-proof LNG of pressure control transports storage tank |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108638948A (en) * | 2018-05-18 | 2018-10-12 | 常州大学 | Gas hydrates storage tank transport vehicle |
| CN110594577A (en) * | 2019-10-22 | 2019-12-20 | 王栋 | Liquefied gas storage tank and reliquefaction method thereof |
| CN112728402A (en) * | 2021-01-04 | 2021-04-30 | 东方电气集团东方锅炉股份有限公司 | Nitrogen displacement and drainage device for hydrogen storage tank |
-
2015
- 2015-09-06 CN CN201510555414.5A patent/CN106499939A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108638948A (en) * | 2018-05-18 | 2018-10-12 | 常州大学 | Gas hydrates storage tank transport vehicle |
| CN110594577A (en) * | 2019-10-22 | 2019-12-20 | 王栋 | Liquefied gas storage tank and reliquefaction method thereof |
| CN110594577B (en) * | 2019-10-22 | 2022-01-25 | 王栋 | Liquefied gas storage tank and reliquefaction method thereof |
| CN112728402A (en) * | 2021-01-04 | 2021-04-30 | 东方电气集团东方锅炉股份有限公司 | Nitrogen displacement and drainage device for hydrogen storage tank |
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| PB01 | Publication | ||
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Application publication date: 20170315 |