CN107606487A - It is applicable the BOG processing systems and method of LNG storage tank under different designs pressure - Google Patents
It is applicable the BOG processing systems and method of LNG storage tank under different designs pressure Download PDFInfo
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Abstract
The present invention provides a kind of BOG processing systems and method for being applicable LNG storage tank under different designs pressure, and the system has low pressure LNG storage tank and high pressure LNG storage tank, and they import house steward BOG, connects BOG surge tanks, is connected to BOG compressors and backflow air blower；Check-valves is installed on the BOG pipelines of the low pressure LNG storage tank, aperture control valve is installed on the BOG pipelines of the high pressure LNG storage tank；House steward BOG is also connected with a branch road for going to flare system, and branch pressure control valve is installed on branch road.By being monitored to the pressure of each pipeline, and control the equipment safety gone flare system, the opening of low pressure LNG storage tank safety valve and high pressure LNG storage tank safety valve, ensure whole system of BOG compressors, branch pipe.
Description
Technical field
The present invention relates to a kind of processing system of LNG boil-off gas (BOG) in LNG receiving stations, more particularly to a kind of difference
The BOG processing systems and processing method of LNG tank under design pressure.
Background technology
LNG storage tank is the visual plant of LNG receiving stations, at present LNG storage tank generally use normal pressure, low temperature large-scale storage tank.LNG
Storage tank can be divided into according to its structure type：Spherical tank, single containing tank, double containment tank, full containing tank and membrane type tank.Wherein, it is single to contain
Tank and the full tank that contains are two kinds of the most frequently used LNG storage tanks of China, are respectively suitable for small-sized LNG receiving stations and Large LNG receiving station.
Single design pressure for holding double walled tank is usually more than 15kPaG, and maximum operating pressure is controlled in 12kPaG or so, its
Inner canister uses 9% nickel steel, and outer tank uses carbon steel and carbon steel vault, design pressure accordingly relatively low.The maximum design pressure of full appearance tank
Usually more than 29kPaG, maximum operating pressure 25kPaG, inner canister use concrete using 9% nickel steel inner canister, outer tank.
Multiple storage tanks of LNG receiving stations of China generally use single structure form, the BOG pipeline communications of multiple storage tanks into
BOG systems.But with the development of LNG industry, LNG receiving stations that the single appearance tank for having occurred building, full appearance tank coexist,
This design to BOG systems proposes new requirement.If according to traditional BOG system designs, by the BOG systems of two kinds of storage tanks
Direct UNICOM, when the pressure of BOG systems has exceeded the design pressure of single containing storage tank, the single appearance tank of low-pressure may be caused
Damage, rupture etc..If using independent BOG processing systems, except need to build respectively high-low pressure storage tank BOG pipelines it
Outside, it is also necessary to set equipment, the construction costs such as independent BOG compressors and unloading BOG air blowers very high respectively.
The content of the invention
It is an object of the invention to：A kind of BOG processing systems for being applicable LNG storage tank under different designs pressure and side are provided
Method, solves above-mentioned technical problem present in prior art.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of BOG processing systems for being applicable LNG storage tank under different designs pressure, there is low pressure LNG storage tank and high pressure LNG to store up
Tank, it is characterised in that：
The BOG pipelines of the low pressure LNG storage tank and the BOG pipelines of the high pressure LNG storage tank import house steward BOG；The BOG
House steward connects BOG surge tanks, is connected to BOG compressors and backflow air blower；
At least one check-valves is installed on the BOG pipelines of the low pressure LNG storage tank；
The manifold pressure transmitter for measuring its pressure is provided with house steward BOG；
House steward BOG is also connected with a branch road for going to flare system, and the branch road installs a branch pressure control
Valve processed；The branch pressure control valve is controlled by the manifold pressure transmitter.
The described BOG processing systems for being applicable LNG storage tank under different designs pressure, wherein：In the high pressure LNG storage tank
BOG pipelines are provided with the line pressure transmitter for measuring its pressure, are additionally provided with out on the BOG pipelines of the high pressure LNG storage tank
Control valve is spent, the aperture control valve is jointly controlled by the line pressure transmitter with manifold pressure transmitter.
The described BOG processing systems for being applicable LNG storage tank under different designs pressure, wherein：The tank of the low pressure LNG storage tank
Top is provided with low-pressure tank safety valve, and its Opening pressure is the design pressure of low pressure LNG storage tank, and its amount of releasing is low pressure LNG storage tank institute
There is the maximum in accident conditions.
The described BOG processing systems for being applicable LNG storage tank under different designs pressure, wherein：The tank of the high pressure LNG storage tank
Top is provided with pressure pan safety valve, and its Opening pressure is the design pressure of high pressure LNG storage tank, and its amount of releasing is high pressure LNG storage tank institute
There is the maximum in accident conditions.
A kind of BOG control methods for being applicable LNG storage tank under different designs pressure, there is as claimed in claim 1 be applicable
The BOG processing systems of LNG storage tank under different designs pressure；
The tank deck of the low pressure LNG storage tank is provided with low-pressure tank safety valve, and the tank deck of the high pressure LNG storage tank is provided with pressure pan
Safety valve；
The maximum operating pressure of the low pressure LNG storage tank is Pdc, maximum design pressure Pds, Pdc ＜ Pds；The height
The maximum operating pressure for pressing LNG storage tank is Pgc, maximum design pressure Pgs, Pgc ＜ Pgs, and Pds ＜ Pgc；Claim manifold pressure
The pressure value that transmitter measures is P2；
Characterized in that, the control method includes：
First, the Opening pressure of the branch pressure control valve is set as Pk, wherein, Pdc ＜ Pk ＜ Pds；
Then, the pressure value P 2 measured according to manifold pressure transmitter is controlled system as follows：
A) P2 ＜ Pk：BOG system pressures now are adjusted mainly by BOG compressors, and BOG compressors improve automatically or drop
The slow-speed of revolution, maintain BOG system pressures stable within the scope of the operating pressure of low pressure LNG storage tank；When BOG system pressures are close or
When reaching Pk, BOG compressor standard-sized sheets；
B) P2=Pk：Now branch pressure control valve open, BOG is emitted into flare system, until P2 be reduced to Pk with
Under, branch pressure control valve is closed；
C) Pk ＜ P2 ＜ Pds：Now according to the following two situations in the source of superpressure point：First, by the non-of low pressure LNG storage tank
BOG system overpressures caused by nominal situation reason, second, the BOG systems as caused by the damage superpressure of high pressure LNG storage tank
Superpressure；
If the i. storage tank superpressure as caused by low pressure LNG storage tank, BOG is arranged to BOG systems from low pressure storage tank, now still according to
By BOG compressors and branch pressure control valve control system pressure, if low pressure LNG storage tank pressure has reached Pds, low-pressure tank peace
Full valve opens pressure release, treats that low pressure LNG storage tank pressure returns to below Pds, low-pressure tank safety valve is closed；
If the ii. BOG system overpressures as caused by high pressure LNG storage tank, then the pressure of BOG systems is higher than low pressure LNG storage tank,
Check-valves can be automatically prevented from gases at high pressure and enter low pressure LNG storage tank, keep pressure stability in low pressure LNG storage tank；
d)Pds≤P2≤Pgs：Now high pressure LNG storage tank is in damage superpressure, and check-valves can be automatically prevented from high pressure
BOG enters low pressure LNG storage tank, maintains low pressure LNG storage tank pressure stability；When high pressure LNG storage tank pressure reaches Pgs, pressure pan
Safety valve opens pressure release, until the pressure ＜ Pgs of high pressure LNG storage tank, pressure pan safety valve blowback；In the meantime, if low pressure LNG
Storage tank rises to Pds because BOG caused by spontaneous evaporation can not be discharged by BOG pipelines and pressure, and low-pressure tank safety valve opens pressure release,
Treat that low pressure LNG storage tank pressure returns to below Pds, low-pressure tank safety valve is closed.
The described BOG control methods for being applicable LNG storage tank under different designs pressure, wherein：In the high pressure LNG storage tank
BOG pipelines are provided with the line pressure transmitter for measuring its pressure, and the pressure value that the line pressure transmitter measures is referred to as P1,
Aperture control valve is additionally provided with the BOG pipelines of the high pressure LNG storage tank, the aperture control valve is by the line pressure pick-up
Device jointly controls with manifold pressure transmitter；The control method also includes：
I. as P1 ＞ P2 and Pk≤P1 ＜ Pgc, the aperture of aperture control valve keeps constant, to utilize high pressure LNG as far as possible
The bearing capacity of storage tank reduces the BOG for being emitted into torch；
Ii. as P1 ＞ P2 and Pgc≤P1≤Pgs, the aperture of aperture control valve is increased until standard-sized sheet, height is discharged with quick
Press the BOG of LNG storage tank；If aperture control valve standard-sized sheet, the pressure of high pressure LNG storage tank still rises when reaching Pgs, high pressure LNG
The pressure pan safety valve of storage tank is opened.
Compared with prior art, the invention has the advantages that：By being monitored to the pressure of each pipeline, and
The opening for removing flare system, low pressure LNG storage tank safety valve and high pressure LNG storage tank safety valve of control BOG compressors, branch pipe, is protected
Demonstrate,prove the equipment safety of whole system.
Brief description of the drawings
Fig. 1 is the structural representation of the BOG processing systems provided by the invention for being applicable LNG storage tank under different designs pressure.
Description of reference numerals：1- low pressure LNG storage tanks；2- high pressure LNG storage tanks；3- switch valves；4- check-valves；5- line pressures
Transmitter；6- aperture control valves；7- manifold pressure transmitters；8- branch pressure control valves；9-BOG surge tanks；10-BOG compresses
Machine；11- backflow air blowers；12- low-pressure tank pressure transmitters；13- low-pressure tank safety valves；14- pressure pan pressure transmitters；15-
Pressure pan safety valve.
Embodiment
As shown in figure 1, a kind of BOG processing systems for being applicable LNG storage tank under different designs pressure provided by the invention, have
Low pressure LNG storage tank 1 and high pressure LNG storage tank 2, and the BOG pipelines of the low pressure LNG storage tank 1 and the high pressure LNG storage tank 2
BOG pipelines import house steward BOG；
House steward BOG connects BOG surge tanks 9, is connected to BOG compressors 10 and backflow air blower 11, the BOG pressures
Contracting machine 10 is communicated in gasification external transport pipeline, and the backflow air blower 11 is communicated in LNG ship (or other equipment) again.
In order to prevent the superpressure of low pressure LNG storage tank 1, the installation one or more on the BOG pipelines of the low pressure LNG storage tank 1
The check-valves 4 of individual different types.
House steward BOG is also connected with a branch road for going to flare system, and the branch road installs a branch pressure control
Valve 8 processed.
The tank deck of the low pressure LNG storage tank 1 is provided with low-pressure tank safety valve 13, and its Opening pressure sets for low pressure LNG storage tank 1
Pressure is counted, its amount of releasing is the maximum in 1 all accident conditionses of low pressure LNG storage tank.
The tank deck of the high pressure LNG storage tank 2 is provided with pressure pan safety valve 15, and its Opening pressure sets for high pressure LNG storage tank 2
Pressure is counted, its amount of releasing is the maximum in 2 all accident conditionses of high pressure LNG storage tank.
The treating capacity of the BOG compressors 10 is two storage tank BOG maximum yields under all operation operating modes；The backflow
The treating capacity of air blower 11 returns ship maximum for BOG under unloading operating mode.
The line pressure transmitter 5 for measuring its pressure is provided with the BOG pipelines of the high pressure LNG storage tank 2, described
House steward BOG is provided with the manifold pressure transmitter 7 for measuring its pressure, is additionally provided with the BOG pipelines of the high pressure LNG storage tank 2
Aperture control valve 6, the aperture control valve 6 are jointly controlled by the line pressure transmitter 5 and manifold pressure transmitter 7,
Control method is described below in conjunction with the embodiments：
1) volume of the low pressure LNG storage tank 1 is 5 × 104m3, pattern contains LNG storage tank to be single, and its operating pressure is 3~
12kPaG, design pressure are -0.5~15kPaG.Herein, the maximum operating pressure of low pressure LNG storage tank 1 be referred to as Pdc (=
12kPaG), maximum design pressure is Pds (=15kPaG).
2) volume of the high pressure LNG storage tank 2 is 16 × 104m3, pattern contains LNG storage tank to be complete, and operating pressure is 6~
25kPaG, design pressure are -0.5~29kPaG.Herein, the maximum operating pressure of high pressure LNG storage tank 2 be referred to as Pgc (=
25kPaG), maximum design pressure is Pgs (=29kPaG).
3) pressure of the BOG systems is measured by manifold pressure transmitter 7, and measurement data automatically controls BOG compressors 10
With branch pressure control valve 8；The BOG line pressures of high pressure LNG storage tank 2 are measured by line pressure transmitter 5, line pressure pick-up
The aperture of aperture control valve 6 described in the measurement data co- controlling of device 5 and manifold pressure transmitter 7；The pressure of low pressure LNG storage tank 1
Power is monitored by low-pressure tank pressure transmitter；The pressure of high pressure LNG storage tank 2 is monitored by line pressure transmitter 5.
4) the BOG compressors 10 can be selected using frequency conversion BOG compressors 10 according to the maximum of BOG during normal operating
Select a BOG compressor 10 or several BOG compressors 10 are in parallel.
5) need to set the Opening pressure Pk of the branch pressure control valve 8, should meet：Pdc ＜ Pk ＜ Pds, this reality
Apply Pk in example and be set as 13kPaG；The Opening pressure setting value of low-pressure tank safety valve 13 is 15kPaG；Pressure pan safety valve 15
Opening pressure setting value is 29kPaG.
6) the BOG processing systems being applicable under different LNG storage tank operating pressures, mainly according to line pressure transmitter
5 pressure value P 1, the pressure value P 2 of manifold pressure transmitter 7, control device or valve event, maintain the pressure of whole system
It is stable.According to the difference of superpressure degree, its processing method is specifically：
6.1) control method of BOG operating pressures：
A) P2 ＜ Pk (=13kPaG)：BOG system pressures now are adjusted mainly by BOG compressors 10.When BOG system pressures
When power is higher or relatively low, BOG compressors 10 improve or reduced automatically rotating speed, maintain BOG system pressures stable in low pressure LNG
Within the scope of the operating pressure of storage tank 1.When BOG system pressures are close to or up Pk (=13kPaG), BOG compressors 10 are complete
Open.Under normal operation, the ability of BOG compressors 10 can handle caused BOG under all nominal situations.
B) P2=Pk (=13kPaG)：When manifold pressure transmitter 7 detect the pressure of BOG systems reach Pk (=
When 13kPaG), branch pressure control valve 8 is opened, and BOG is emitted into flare system.After branch pressure control valve 8 is opened, BOG systems
The pressure of system gradually reduces, until the operating pressure of BOG systems is reduced to Pk (=13kPaG) below, branch pressure control valve 8
Close, system still maintains pressure stability by BOG compressors 10.
C) Pk (=13kPaG) ＜ P2 ＜ Pds (=15kPaG)：When the oepration at full load of BOG compressors 10 and branch pressure control
In the case of valve 8 processed all standard-sized sheets, the pressure of BOG systems still rises.The source of superpressure has following two：First, by low pressure LNG
BOG system overpressures caused by the damage reason of storage tank 1, second, being caused by the damage superpressure of high pressure LNG storage tank 2
BOG system overpressures.
I. if the storage tank superpressure as caused by low pressure LNG storage tank 1, BOG are arranged to BOG systems from low pressure storage tank, now remained unchanged
By BOG compressors 10 and the control system pressure of branch pressure control valve 8.If the pressure of low pressure LNG storage tank 1 reached Pds (=
15kPaG), then low-pressure tank safety valve 13 opens pressure release, treats that the pressure of low pressure LNG storage tank 1 returns to Pds (=15kPaG) below, low
Pressure tank safety valve 13 is closed.
If the ii. BOG system overpressures as caused by high pressure LNG storage tank 2, then the pressure of BOG systems is higher than low pressure LNG storage tank
1, check-valves 4 can be automatically prevented from gases at high pressure and enter low pressure LNG storage tank 1, keep pressure stability in low pressure LNG storage tank 1.
D) Pds (=15kPaG)≤P2≤Pgs (=29kPaG)：The operating mode is abnormal operation operating mode, i.e. BOG compresses
In the case of machine 10 and all standard-sized sheets of branch pressure control valve 8, the rising of BOG pressure can not be controlled.Its reason is high pressure LNG
The damage superpressure of storage tank 2, now check-valves 4 be automatically prevented from high pressure BOG and enter low pressure LNG storage tank 1, maintain low pressure LNG
The pressure stability of storage tank 1.When the pressure of high pressure LNG storage tank 2 reaches Pgs (=29kPaG), pressure pan safety valve 15 opens pressure release.Through
After a period of time, the pressure ＜ Pgs (=29kPaG) of high pressure LNG storage tank 2, pressure pan safety valve 15 returns seat.In the meantime, if
Low pressure LNG storage tank 1 is because BOG caused by spontaneous evaporation can not be discharged by BOG pipelines, then the pressure of low pressure LNG storage tank 1 may rise to
Pds (=15kPaG), low-pressure tank safety valve 13 open pressure release, treat the pressure of low pressure LNG storage tank 1 return to Pds (=15kPaG) with
Under, low-pressure tank safety valve 13 is closed.
6.2) the operating pressure control method of high pressure LNG storage tank 2：
If a) P1 ＜ P2：Now aperture control valve 6 is turned down, P1 is moved closer to and is eventually equal to P2；
If b) P1 ＞ P2：It is divided into two kinds of situations again under the conditions of such a, when Pk (=13kPaG)≤P1 ＜ Pgc (=
25kPaG), second, Pgc (=25kPaG)≤P1≤Pgs (=29kPaG), the operation of aperture control valve 6 are different.
I. as P1 ＞ P2 and Pk (=13kPaG)≤P1 ＜ Pgc (=25kPaG), the aperture of aperture control valve 6 is kept not
Become.So operation, which can try one's best, is emitted into the BOG of torch using the bearing capacity reduction of high pressure LNG storage tank 2, reduces economic damage
Lose.
Ii. as P1 ＞ P2 and Pgc (=25kPaG)≤P1≤Pgs (=29kPaG), the pressure of high pressure LNG storage tank 2 is
Through more than its normal opereating specification, now increasing the aperture of aperture control valve 6 until standard-sized sheet, quick to discharge high pressure LNG storage tank 2
BOG to reduce the pressure of high pressure LNG storage tank 2, protect storage tank；If the standard-sized sheet of aperture control valve 6, the pressure of high pressure LNG storage tank 2
Still when rising reaches Pgs (=29kPaG), the pressure pan safety valve 15 of high pressure LNG storage tank 2 is opened.
In a word, the control method of the BOG processing systems for being applicable LNG storage tank under different designs pressure, is to occur
In the case of superpressure operating mode, pressure passes sequentially through following equipment or valve measure release：BOG compressors 10, branch pipe remove torch
System, the safety valve of low pressure LNG storage tank 1 and the safety valve of high pressure LNG storage tank 2.
Claims (6)
1. a kind of BOG processing systems for being applicable LNG storage tank under different designs pressure, there is low pressure LNG storage tank and high pressure LNG to store up
Tank, it is characterised in that：
The BOG pipelines of the low pressure LNG storage tank and the BOG pipelines of the high pressure LNG storage tank import house steward BOG；House steward BOG
BOG surge tanks are connected, are connected to BOG compressors and backflow air blower；
At least one check-valves is installed on the BOG pipelines of the low pressure LNG storage tank；
The manifold pressure transmitter for measuring its pressure is provided with house steward BOG；
House steward BOG is also connected with a branch road for going to flare system, and the branch road installs a branch pressure control valve；
The branch pressure control valve is controlled by the manifold pressure transmitter.
2. the BOG processing systems according to claim 1 for being applicable LNG storage tank under different designs pressure, it is characterised in that：
The BOG pipelines of the high pressure LNG storage tank are provided with the line pressure transmitter for measuring its pressure, in the high pressure LNG storage tank
Aperture control valve is additionally provided with BOG pipelines, the aperture control valve is by the line pressure transmitter and manifold pressure transmitter
Jointly control.
3. the BOG processing systems according to claim 2 for being applicable LNG storage tank under different designs pressure, it is characterised in that：Institute
The tank deck for stating low pressure LNG storage tank is provided with low-pressure tank safety valve, and its Opening pressure is the design pressure of low pressure LNG storage tank, and it is released
Measure as the maximum in all accident conditionses of low pressure LNG storage tank.
4. the BOG processing systems according to claim 2 for being applicable LNG storage tank under different designs pressure, it is characterised in that：Institute
The tank deck for stating high pressure LNG storage tank is provided with pressure pan safety valve, and its Opening pressure is the design pressure of high pressure LNG storage tank, and it is released
Measure as the maximum in all accident conditionses of high pressure LNG storage tank.
5. a kind of BOG control methods for being applicable LNG storage tank under different designs pressure, there is as claimed in claim 1 be applicable not
With the BOG processing systems of LNG storage tank under design pressure；
The tank deck of the low pressure LNG storage tank is provided with low-pressure tank safety valve, and the tank deck of the high pressure LNG storage tank is provided with pressure pan safety
Valve；
The maximum operating pressure of the low pressure LNG storage tank is Pdc, maximum design pressure Pds, Pdc ＜ Pds；The high pressure LNG
The maximum operating pressure of storage tank is Pgc, maximum design pressure Pgs, Pgc ＜ Pgs, and Pds ＜ Pgc；Claim manifold pressure pick-up
The pressure value that device measures is P2；
Characterized in that, the control method includes：
First, the Opening pressure of the branch pressure control valve is set as Pk, wherein, Pdc ＜ Pk ＜ Pds；
Then, the pressure value P 2 measured according to manifold pressure transmitter is controlled system as follows：
A) P2 ＜ Pk：BOG system pressures now are adjusted mainly by BOG compressors, and BOG compressors, which are improved or reduced automatically, to be turned
Speed, maintain BOG system pressures stable within the scope of the operating pressure of low pressure LNG storage tank；When BOG system pressures close to or up
During Pk, BOG compressor standard-sized sheets；
B) P2=Pk：Now branch pressure control valve is opened, and BOG is emitted into flare system, until P2 is reduced to below Pk, is propped up
Road pressure-control valve is closed；
C) Pk ＜ P2 ＜ Pds：Now according to the following two situations in the source of superpressure point：First, by the improper of low pressure LNG storage tank
BOG system overpressures caused by operating mode reason, second, the BOG system overpressures as caused by the damage superpressure of high pressure LNG storage tank；
If the i. storage tank superpressure as caused by low pressure LNG storage tank, BOG is arranged to BOG systems from low pressure storage tank, is now still relied on
BOG compressors and branch pressure control valve control system pressure, if low pressure LNG storage tank pressure has reached Pds, low-pressure tank safety
Valve opens pressure release, treats that low pressure LNG storage tank pressure returns to below Pds, low-pressure tank safety valve is closed；
If the ii. BOG system overpressures as caused by high pressure LNG storage tank, then the pressure of BOG systems is higher than low pressure LNG storage tank, non-return
Valve can be automatically prevented from gases at high pressure and enter low pressure LNG storage tank, keep pressure stability in low pressure LNG storage tank；
d)Pds≤P2≤Pgs：Now high pressure LNG storage tank is in damage superpressure, and check-valves can be automatically prevented from high pressure BOG
Into low pressure LNG storage tank, low pressure LNG storage tank pressure stability is maintained；When high pressure LNG storage tank pressure reaches Pgs, pressure pan safety
Valve opens pressure release, until the pressure ＜ Pgs of high pressure LNG storage tank, pressure pan safety valve blowback；In the meantime, if low pressure LNG storage tank
Pds is risen to and pressure because BOG caused by spontaneous evaporation can not be discharged by BOG pipelines, low-pressure tank safety valve is opened pressure release, treated low
Pressure LNG storage tank pressure returns to below Pds, and low-pressure tank safety valve is closed.
6. the BOG control methods according to claim 5 for being applicable LNG storage tank under different designs pressure, it is characterised in that：
The BOG pipelines of the high pressure LNG storage tank are provided with the line pressure transmitter for measuring its pressure, claim the line pressure transmitter
The pressure value measured is P1, and aperture control valve, the aperture control valve are additionally provided with the BOG pipelines of the high pressure LNG storage tank
Jointly controlled by the line pressure transmitter with manifold pressure transmitter；The control method also includes：
I. as P1 ＞ P2 and Pk≤P1 ＜ Pgc, the aperture of aperture control valve keeps constant, to utilize high pressure LNG storage tank as far as possible
Bearing capacity reduce and be emitted into the BOG of torch；
Ii. as P1 ＞ P2 and Pgc≤P1≤Pgs, the aperture of aperture control valve is increased up to standard-sized sheet, quickly to discharge high pressure
The BOG of LNG storage tank；If aperture control valve standard-sized sheet, the pressure of high pressure LNG storage tank still rises when reaching Pgs, high pressure LNG storages
The pressure pan safety valve of tank is opened.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099640A (en) * | 2018-08-21 | 2018-12-28 | 中国寰球工程有限公司 | Ethylene BOG gas comprehensive reutilization system and method |
| CN109915731A (en) * | 2019-04-02 | 2019-06-21 | 中国石油工程建设有限公司 | A kind of big drop lpg pipeline pressure protective system and method |
| CN114754289A (en) * | 2022-05-07 | 2022-07-15 | 威海中远海运重工科技有限公司 | LNG ship low-pressure gas supply system and method |
| CN114941801A (en) * | 2022-05-27 | 2022-08-26 | 国家石油天然气管网集团有限公司 | BOG (boil off gas) emptying control system of LNG (liquefied Natural gas) receiving station |
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| CN114754289A (en) * | 2022-05-07 | 2022-07-15 | 威海中远海运重工科技有限公司 | LNG ship low-pressure gas supply system and method |
| CN114941801A (en) * | 2022-05-27 | 2022-08-26 | 国家石油天然气管网集团有限公司 | BOG (boil off gas) emptying control system of LNG (liquefied Natural gas) receiving station |
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