CN207635007U - Defeated system outside a kind of liquefied natural gas receiving station railway - Google Patents
Defeated system outside a kind of liquefied natural gas receiving station railway Download PDFInfo
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- CN207635007U CN207635007U CN201721797880.5U CN201721797880U CN207635007U CN 207635007 U CN207635007 U CN 207635007U CN 201721797880 U CN201721797880 U CN 201721797880U CN 207635007 U CN207635007 U CN 207635007U
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Abstract
The utility model discloses defeated systems outside a kind of liquefied natural gas receiving station railway, it includes the railway system, entrucking and returns gas system, nitrogen system and drainage system；Wherein, the railway system include lay in LNG receiving stations special purpose railroad and the tank car that is run in special purpose railroad；It entrucking and returns gas system and includes entrucking pipeline, returns gas pipeline, entrucking arm and returns gas arm, LNG storage tank is stretched into one end of entrucking pipeline, and connect with the dress liquid pump in LNG storage tank, the other end has the branch line of multiple parallel connections, and entrucking arm is equipped on each branch line；The one end for returning gas pipeline is stretched into LNG storage tank, and the other end is also equipped with the branch line of multiple parallel connections, is equipped on each branch line and returns gas arm；Nitrogen system is used to blow entrucking arm with gas arm progress nitrogen is returned, meanwhile, for the continuous mechanical seal to entrucking arm and the rotary joint returned on gas arm；Drainage system is for the LNG raffinates in entrucking pipeline to be transferred back in LNG storage tank.
Description
Technical field
The utility model is related to defeated systems outside a kind of liquefied natural gas receiving station railway, belong to liquefied natural gas conveying technology
Field and logistics field.
Background technology
LNG (Liquefied Natural Gas, liquefied natural gas) as a kind of well-known cleaning, high efficient energy sources,
Have become fastest-rising one of energy industry, becomes the hot spot of global energy markets.The low temperature of LNG, easily gasification
Characteristic stores it and transport proposes higher requirement, and means of transportation includes LNG ship fortune, highway transportation, pipeline transportation.Mesh
Before, for international large LNG trade transportations mainly based on LNG ship, the liquid LNG conveyings of LNG factories and receiving station are most of by public affairs
Road tank car transport.
Since two thousand six, each energy enterprise in China starts to build LNG receiving stations, be coastal area natural gas supply with
Peak regulation has made huge contribution.LNG receiving stations are divided into outside gaseous state that defeated two ways, concrete technology flow process are outside defeated and liquid,
After liquid LNG in LNG storage tank is pumped out by low-lift pump, it is divided into two-way, all the way through evaporating air compressor, after-condenser, height
Press pump, gasifier will be delivered to gaseous state user after LNG gasification by outer defeated pipe network, and another way prizes through entrucking and fills liquid LNG
To LNG tank cars, downstream user is delivered to by highway.
Therefore, it is always that tradition LNG receiving stations are unique based on defeated flexible and convenient feature outside LNG tank car highways
Liquid mode of movement, China have become the most flourishing country of the land Highway Transportation Markets of LNG in the world.But as natural gas disappears
The violent increase of consumption, LNG tank car Highway Transportation Markets are more and more active, but by traditional LNG receiving stations far from gas consumption area,
The small limitation of single measuring tank vehicle freight volume, tank car usually will appear the phenomenon that standing in a long queue liquid feeding in entrucking, and tank car transport capacity is a large amount of
Loss, reduction, tank car entrucking is less efficient, and LNG stream market receives larger limitation, and entire LNG is only completed by tank car
Defeated task has been unable to meet the demand in market outside the liquid of receiving station.LNG tank car freight volumes are small, of high cost, efficiency is low, traffic coverage
Small and the shortcomings of cannot covering demand from far-off regions, gradually appears undoubtedly, does not adapt to keen competition environment year by year,
Limit the development of LNG industry to a certain extent, there is an urgent need for extensions for defeated mode and ability outside the liquid of LNG.
Invention content
In view of the above-mentioned problems, the purpose of this utility model is to provide defeated system outside a kind of liquefied natural gas receiving station railway,
Realize that the liquid of LNG is marketed using advantages such as railway tank car freight volume is big, transportation cost is low, efficient, high safeties, Neng Gouzeng
Add the outer defeated radiation scope and sales volume of LNG receiving stations, realizes the innovation and popularization of LNG stream pattern.
To achieve the above object, the utility model uses following technical scheme：Outside a kind of liquefied natural gas receiving station railway
Defeated system, it is characterised in that：It includes the railway system, entrucking and returns gas system, nitrogen system and drainage system；Wherein, described
The railway system include lay in LNG receiving stations special purpose railroad and the tank car that is run in the special purpose railroad；
It the entrucking and returns gas system and includes entrucking pipeline, returns gas pipeline, entrucking arm and returns gas arm, one end of the entrucking pipeline is stretched into
LNG storage tank, and connect with the dress liquid pump in the LNG storage tank, the other end of the entrucking pipeline has the branch of multiple parallel connections
Pipeline, the entrucking arm is equipped on each branch line, and the entrucking arm is used to LNG being delivered to the tank car
It is interior；Described one end for returning gas pipeline is stretched into the LNG storage tank, and the other end is also equipped with the branch line of multiple parallel connections, Mei Yisuo
It states and returns gas arm described in being equipped on branch line, the gas arm that returns is stored up for the evaporation BOG of tank car to be transferred back to the LNG
In tank；The nitrogen system be used for before entrucking starts and entrucking terminate before to the entrucking arm and return gas arm carry out nitrogen blow,
Meanwhile for the continuous mechanical seal to the entrucking arm and the rotary joint returned on gas arm；The drainage system is used for institute
The LNG raffinates stated in entrucking pipeline are transferred back in the LNG storage tank.
The drainage system is tapping line, and one end of the tapping line is in parallel with entrucking pipeline output end,
The other end stretches into the LNG storage tank.
The nitrogen system includes Nitrogen pipe network, and the Nitrogen pipe network includes multiple nitrogen flushing branch lines, each described to blow
Nitrogen branch line corresponds to and the entrucking arm and returns gas arm and be connected to.
The tank car quantity is no more than the nitrogen flushing branch line quantity configured in LNG receiving stations.
Further include robot control system(RCS), the robot control system(RCS) be used for the railway system, entrucking and return gas system, nitrogen system and
Drainage system is continuously monitored and is controlled.
The robot control system(RCS) includes temperature, pressure, the measuring instrumentss of flow and setting are equipped in receiving station tight
Anxious Shuttoff Valve and emergency stop push button, by the process data of collection in worksite and processing critical positions, operating personnel are on the spot
Or remote monitoring and voluntarily control operation, realize monitoring and control to defeated system outside entire railway.
The robot control system(RCS) is realized using full factory's Distributed Control System and emergency stopping system to defeated system outside railway
Remote control and alarm and automatically shut down.
Further include fire-fighting system, the fire-fighting system accidental fire occurs for defeated system outside LNG receiving stations railway
Put out a fire to save life and property.
The fire-fighting system includes fire fighting water system, froth fire extinguishing system, powder extinguishing system and mobile fire extinguisher.
The utility model uses above technical scheme, has the following advantages that：The utility model for LNG receiving stations by increasing
It, on the one hand can be independently real using railway system's safety and stability, the feature that freight volume is big, efficient if defeated system outside railway liquid
Defeated technique outside existing liquid LNG solves the problems, such as defeated stagnation outside liquid when highway system repair or tank car thrashing, another
Aspect can be completed at the same time task defeated outside liquid LNG with tank car system, improve efficiency and ability defeated outside liquid LNG, increase
The outer defeated radiation scope and sales volume of LNG receiving stations realize the innovation and popularization of LNG stream pattern.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model.
Specific implementation mode
The utility model is described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the utility model provides defeated system outside a kind of liquefied natural gas receiving station railway, it includes railway
System, entrucking and return gas system, nitrogen system, drainage system, robot control system(RCS) and fire-fighting system；
Wherein, the railway system include lay in LNG receiving stations special purpose railroad 1 and run in special purpose railroad 1
Tank car 8；
It entrucking and returns gas system and includes entrucking pipeline 2, returns gas pipeline 3, entrucking arm 4 and returns gas arm 5, the one of entrucking pipeline 2
LNG storage tank 6 is stretched at end, and is connect with the dress liquid pump 7 in LNG storage tank 6, and the other end has the branch line of multiple parallel connections, each
Entrucking arm 4 is equipped on branch line, entrucking arm 4 is for LNG to be delivered in tank car 8；The one end for returning gas pipeline 3 is stretched into
In LNG storage tank 6, the other end is also equipped with the branch line of multiple parallel connections, is equipped on each branch line and returns gas arm 5, returns gas arm 5
For the evaporation BOG of tank car 8 to be transferred back in LNG storage tank 6 to ensure that the pressure in tank car 8 is in equilibrium state；
Nitrogen system is mainly defeated system offer nitrogen outside railway, is on the one hand used for entrucking arm 4 and returns blowing for gas arm 5
It sweeps, is on the other hand used for entrucking arm 4 and returns the continuous mechanical seal of rotary joint on gas arm 5, wherein between purging is with nitrogen
Disconnected property, before entrucking starts, nitrogen system first connects entrucking arm 4, is purged to entrucking arm 4 using nitrogen, displacement entrucking arm 4
Interior air, prevents from forming explosion environment；Then it reconnects and returns gas arm 5, purged using nitrogen to returning gas arm 5, displacement is returned
Air in gas arm 5；Before entrucking terminates, i.e. the entrucking of tank car 8 is completed, and is disconnected entrucking arm 4, is being returned gas arm 5 and railway tank
Before the connection of vehicle 8, using nitrogen simultaneously to entrucking arm 4, return gas arm 5 and purge, to clear up entrucking and return in gas system
BOG and raffinate have not only saved the energy, but also can prevent personnel's frostbite phenomenon；
Drainage system is tapping line 9, and one end of tapping line 9 and the output end of entrucking pipeline 2 are in parallel, and the other end stretches into
In LNG storage tank 6；LNG raffinates in entrucking pipeline 2 are drained into through its end in tapping line 9, due to pressure difference, in tapping line 9
LNG raffinates from flowing back into LNG storage tank 6；When insufficient pressure, carrying out purging to entrucking arm 4 using nitrogen system makes entrucking pipe
LNG raffinates are transferred back to through tapping line 9 in LNG storage tank 6 in line 2；
Robot control system(RCS) is for continuously supervising the railway system, entrucking with gas system, nitrogen system and drainage system is returned
It surveys and controls, various contingencies or dangerous working condition are monitored in real time, once there is unexpected problem, are reported at the first time
It warns and passes through system logic and automatically handle control, to control insecurity in minimum zone；
Fire-fighting system includes that the fire-fightings such as fire fighting water system, froth fire extinguishing system, powder extinguishing system, mobile fire extinguisher are set
It applies, is mainly used for defeated system outside LNG receiving stations railway and putting out a fire to save life and property for accidental fire occur.
Further, nitrogen system includes Nitrogen pipe network 10, and Nitrogen pipe network 10 includes multiple nitrogen flushing branch lines, each to blow
Nitrogen branch line corresponds to and entrucking arm 4 and returns gas arm 5 and be connected to.The quantity of nitrogen flushing branch line is by liquid maximum city of LNG receiving stations
Field amount carries out calculating determination, and when tank car 8 enters LNG receiving stations dress liquid, LNG receiving stations are not to be exceeded in 8 quantity of tank car
The nitrogen flushing branch line quantity of interior configuration.
Further, robot control system(RCS) includes that the measuring instrumentss such as temperature, pressure, flow and setting are equipped in receiving station
Emergency shutdown valve and emergency stop push button, by collection in worksite and processing critical positions process data, operating personnel's
On the spot or remote monitoring and voluntarily control operation, monitoring and control to defeated system outside entire railway is realized.
Further, robot control system(RCS) also can be used full factory's Distributed Control System (Distributed Control System,
Abbreviation DCS system) and emergency stopping system (Emergency Shutdown Device, abbreviation ESD system) realize to railway
It the remote control of outer defeated system and alarm and automatically shuts down.
The utility model use process is as follows：When tank car 8, which reaches special purpose railroad 1, specifies point of loading, root
The entrucking arm 4 of respective numbers is connected according to tank car quantity and returns gas arm 5, and leakage test is carried out to defeated system outside entire railway,
Tank car 8 is depressured and is pre-chilled, before entrucking, to entrucking arm 4 and the progress nitrogen purging of gas arm 5 is returned using nitrogen system
Displacement is to exclude the influence of the foreign gases such as air, and later, the LNG in LNG storage tank 6 passes through after being pressurizeed by the dress liquid pump 7 in it
Entrucking pipeline 2 is delivered to entrucking arm 4, and entrucking arm 4 is connect with tank car 8, and LNG is added in tank car 8, while railway tank
The evaporation BOG of vehicle 8 recycle through returning gas arm 5 and it is logical return gas pipeline 3 and be fed back to LNG storage tank 6, before entrucking terminates, i.e., tank car 8 has been
Entrucking is completed, before disconnecting entrucking arm 4, returning connection of the gas arm 5 with tank car 8, using nitrogen system again to 4 He of entrucking arm
It returns gas arm 5 and carries out nitrogen purging displacement, make to return BOG remaining in gas pipeline 3 and be transferred back in LNG storage tank 6, in entrucking pipeline 2
LNG raffinates are transferred back to LNG storage tank 6 through tapping line 9；In whole process, the operating pressure of tank car 8 is 0.3~0.7MPa,
Robot control system(RCS) complete monitoring tank car 8, entrucking and return various process parameters in gas system, it is ensured that entrucking process safety stablizes fortune
Row.
The utility model is only illustrated with above-described embodiment, and structure, installation position and its connection of each component are all can
With what is be varied from.It is all that individual part is carried out according to the utility model principle on the basis of technical solutions of the utility model
Improvement or equivalents, should not exclude except the scope of protection of the utility model.
Claims (9)
1. defeated system outside a kind of liquefied natural gas receiving station railway, it is characterised in that：It includes the railway system, entrucking and returns gas system
System, nitrogen system and drainage system；
Wherein, the railway system include lay in LNG receiving stations special purpose railroad and the special purpose railroad transport
Capable tank car；
It the entrucking and returns gas system and includes entrucking pipeline, returns gas pipeline, entrucking arm and returns gas arm, one end of the entrucking pipeline
LNG storage tank is stretched into, and is connect with the dress liquid pump in the LNG storage tank, the other end of the entrucking pipeline has multiple parallel connections
Branch line, the entrucking arm is equipped on each branch line, and the entrucking arm is used to LNG being delivered to the railway
In tank car；Described one end for returning gas pipeline is stretched into the LNG storage tank, and the other end is also equipped with the branch line of multiple parallel connections, often
Be equipped on one branch line it is described return gas arm, it is described that return gas arm described for the evaporation BOG of tank car to be transferred back to
In LNG storage tank；
The nitrogen system be used for before entrucking starts and entrucking terminate before to the entrucking arm and return gas arm carry out nitrogen blow, together
When, for the continuous mechanical seal to the entrucking arm and the rotary joint returned on gas arm；
The drainage system is for the LNG raffinates in the entrucking pipeline to be transferred back in the LNG storage tank.
2. defeated system outside a kind of liquefied natural gas receiving station as described in claim 1 railway, it is characterised in that：The drain system
System is tapping line, and one end of the tapping line is in parallel with entrucking pipeline output end, and the other end stretches into the LNG storages
In tank.
3. defeated system outside a kind of liquefied natural gas receiving station as described in claim 1 railway, it is characterised in that：The nitrogen system
System includes Nitrogen pipe network, and the Nitrogen pipe network includes multiple nitrogen flushing branch lines, each nitrogen flushing branch line correspondence and institute
It states entrucking arm and returns the connection of gas arm.
4. defeated system outside a kind of liquefied natural gas receiving station as claimed in claim 3 railway, it is characterised in that：The railway tank
Vehicle quantity is no more than the nitrogen flushing branch line quantity configured in LNG receiving stations.
5. defeated system outside a kind of liquefied natural gas receiving station as described in claim 1 railway, it is characterised in that：It further include automatic control
System, the robot control system(RCS) is for continuously supervising the railway system, entrucking with gas system, nitrogen system and drainage system is returned
It surveys and controls.
6. defeated system outside a kind of liquefied natural gas receiving station as claimed in claim 5 railway, it is characterised in that：The automatic control system
System includes being equipped with temperature, pressure, the measuring instrumentss of flow and the emergency shutdown valve of setting in receiving station and promptly stopping
Vehicle button, by the process data of collection in worksite and processing critical positions, operating personnel on the spot or remote monitoring and voluntarily
Control operation, realizes the monitoring and control to defeated system outside entire railway.
7. defeated system outside a kind of liquefied natural gas receiving station as claimed in claim 5 railway, it is characterised in that：The automatic control system
System using full factory's Distributed Control System and emergency stopping system come realize to the remote control of defeated system outside railway and alarm and
It automatically shuts down.
8. defeated system outside a kind of liquefied natural gas receiving station as described in claim 1 railway, it is characterised in that：It further include fire-fighting
There is putting out a fire to save life and property for accidental fire for defeated system outside LNG receiving stations railway in system, the fire-fighting system.
9. defeated system outside a kind of liquefied natural gas receiving station as claimed in claim 8 railway, it is characterised in that：The fire-fighting system
System includes fire fighting water system, froth fire extinguishing system, powder extinguishing system and mobile fire extinguisher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721797880.5U CN207635007U (en) | 2017-12-20 | 2017-12-20 | Defeated system outside a kind of liquefied natural gas receiving station railway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721797880.5U CN207635007U (en) | 2017-12-20 | 2017-12-20 | Defeated system outside a kind of liquefied natural gas receiving station railway |
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| Publication Number | Publication Date |
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| CN207635007U true CN207635007U (en) | 2018-07-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906369A (en) * | 2017-12-20 | 2018-04-13 | 中海石油气电集团有限责任公司 | Defeated system outside a kind of liquefied natural gas receiving station railway |
-
2017
- 2017-12-20 CN CN201721797880.5U patent/CN207635007U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906369A (en) * | 2017-12-20 | 2018-04-13 | 中海石油气电集团有限责任公司 | Defeated system outside a kind of liquefied natural gas receiving station railway |
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