CN206582524U - A kind of pipe unloading system of LNG filling stations two - Google Patents
A kind of pipe unloading system of LNG filling stations two Download PDFInfo
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- CN206582524U CN206582524U CN201720232999.1U CN201720232999U CN206582524U CN 206582524 U CN206582524 U CN 206582524U CN 201720232999 U CN201720232999 U CN 201720232999U CN 206582524 U CN206582524 U CN 206582524U
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- lng
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- liquid
- unloading
- pipe
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- 238000003860 storage Methods 0.000 claims abstract description 90
- 239000007791 liquid phase Substances 0.000 claims abstract description 69
- 239000012071 phase Substances 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 210000000214 Mouth Anatomy 0.000 claims abstract description 27
- 239000007792 gaseous phase Substances 0.000 claims abstract description 24
- 238000009792 diffusion process Methods 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003949 liquefied natural gas Substances 0.000 description 100
- 238000002309 gasification Methods 0.000 description 5
- 239000006200 vaporizer Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Abstract
The utility model discloses a kind of pipe unloading system of LNG filling stations two, including at least one storage tank A, LNG tank car and booster of unloading, the LNG tank cars are provided with diffusion mouth, gas phase mouth and liquid phase mouthful, the gas phase mouths of LNG tank cars, liquid phase mouth input respectively with gas phase pipe, the output end of liquid-phase tube are connected, and input again with the LNG tank cars gas phase pipe is connected after the gaseous phase outlet at the top of storage tank A is connected with the gaseous phase outlet of the booster of unloading；The LNG that the LNG tank cars liquid-phase tube includes connecting with the LNG tank cars liquid-phase tube output end unloads liquid pipe, and the LNG tank cars unload the feed tube that liquid pipe connects the storage tank A by the LNG, in LNG tank car liquid-phase tubes output end provided with liquid phase mouthful master control valve f.The utility model uses two pipe unloading systems, and the pressure of balancing tank and tank car is first passed through when unloading, and makes tank car pressure boost rapid, the characteristics of being remained with quick, the reduction LNG that unloads, reduce middle LNG losses of unloading, improve quality of unloading, saving production cost.
Description
Technical field
The utility model is related to liquefied natural gas filling technical field, and in particular to a kind of pipe of LNG filling stations two, which is unloaded, is
System.
Background technology
Liquefied natural gas（LNG）It is a kind of energy of clean and effective, with gasoline, diesel oil and compressed natural gas（CNG）Compare,
With the obvious advantage such as safe, economy is strong, negative environment effects are small, energy storage density is high.LNG is as motor vehicle fuel, extensively
City bus, heavy truck and intercity bus are applied to generally, and matched LNG filling stations are also synchronously rapidly developed.
At present, in LNG station, unloading way has two kinds：Immersed pump is unloaded and unloaded from supercharging.
Chinese patent application publication No. CN205592637U, data of publication of application：It is on 09 21st, 2016, entitled《LNG
The tank car unloading system stood》Utility model application patent in, disclose a kind of tank car unloading system of LNG stations, including band
There are the platform of LNG oil filling risers and BOG oil filling risers, the LNG full appearance tanks with immersed pump, liquid phase pipeline and gas phase pipeline, the liquid phase
The LNG that pipeline includes being connected with the LNG oil filling risers unloads liquid pipe, and it is described that the platform unloads liquid pipe connection by the LNG
LNG full appearance tanks, the LNG unloads liquid pipe provided with hydraulic control valve and check-valves, and the LNG full appearance tanks are connected by liquid phase pipeline
To LNG surge tanks, the bottom of the LNG surge tanks is unloaded liquid pipe with the LNG by liquid phase pipeline and docked, and utilizes LNG surge tanks
Interior BOG is pressurized to tank car, shortens the time of unloading.Above-mentioned technical proposal beats the liquid LNG in tank car using immersed pump
Enter into storage tank, in the process, due to the inevitable leakage of pump, it will LNG is polluted, reliability is low；And
Using immersed pump come discharging one be consumption electric energy, two be easily caused in actual moving process impeller and sealedly damage, return
Repair rate higher.Current immersed pump is mostly import equipment, and maintenance cost is high and influence LNG stations are normally run, and invests and runs
Cost is high.
Chinese patent application publication No. CN205118653U, data of publication of application：It is on 03 30th, 2016, entitled《It is a kind of
LNG is pressurized unloading unit certainly》Utility model application patent in, a kind of open LNG that knows clearly is from unloading unit is pressurized, and it includes
LNG storage tanks, LNG tank cars and vaporizer, the liquid phase inlet of vaporizer are connected with the liquid phase of LNG tank cars mouthful, the gas phase of vaporizer
Gas outlet is connected with the gas phase mouth of LNG tank cars, and the liquid outlet of LNG tank cars is connected with the liquid phase mouthful and gas phase mouth of LNG storage tanks respectively.
This programme is using going out operation by the way of liquid flexible pipe, pressurized hoses and the pipe of return-air flexible pipe three are unloaded, by pressurized hoses by tank car
LNG lead into vaporizer gasification, then sent back to the natural gas after gasification is counter by muffler in tank car, make tank car pressure liter
Height, when tank car pressure is more than tank inner pressure, LNG liquid can be entered in storage tank by going out liquid flexible pipe in tank car.
Three-tube type unload method boost process it is slower, tank car pressure need since 0.1Mpa be pressurized, during supercharging
Between it is longer, and pressure of storage tank it is higher when need emptying, LNG waste it is more.After unloading, above-mentioned three-tube type processand can be due to
Lack of equilibrium tank car and pressure of storage tank, causing pressure of storage tank to be slightly above in tank car pressure, tank car, residual LNG is excessive, causes supply and marketing poor
Excessive the problem of.
Utility model content
For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of supercharging rapidly, can be effective
LNG residual quantities are reduced, wastes and pollution is reduced, and facilitate the feasible pipe unloading system of LNG filling stations two, solve to carry on the back with effective
The problem of in scape technology.
In order to solve the above technical problems, the utility model provides following technical scheme：
A kind of pipe unloading system of LNG filling stations two, including at least one storage tank A, LNG tank car and booster of unloading, institute
LNG tank cars are stated provided with diffusion mouth, gas phase mouth and liquid phase mouthful, the gas phase mouth of LNG tank cars, the input of liquid phase mouth respectively with gas phase pipe
End, liquid-phase tube output end be connected, the gaseous phase outlet at the top of storage tank A be connected with the gaseous phase outlet of the booster of unloading after again with
The input of the LNG tank cars gas phase pipe is connected；The LNG tank cars liquid-phase tube includes and the LNG tank cars liquid-phase tube output end
A piece LNG of series connection unloads liquid pipe, and the LNG tank cars unload the feed tube that liquid pipe connects the storage tank A by the LNG, in LNG grooves
Car liquid-phase tube output end is provided with liquid phase mouthful master control valve f.
Further, the fluid inlet of the booster of unloading by liquid-phase tube liquid-phase outlet respectively with storage tank A bottoms,
The output end of the liquid phase mouthful master control valve f is connected, and divides on the liquid phase pipeline of the booster fluid inlet both sides of unloading
She You not storage tank A liquid phase liquid outlet valve d, LNG tank car liquid phase liquid outlet valves g.
Further, the LNG unloads liquid pipe and is connected to two liquid-phase tubes of the fluid inlet of the booster of unloading simultaneously
Connection, the feed tube of the storage tank A is provided with storage tank A liquid phase inlet valves c.
Further, the gas phase that the gaseous phase outlet at the top of the storage tank A is connected with the gaseous phase outlet of the booster of unloading
Pipeline is provided with the storage tank A gas phase mouth valve b close to storage tank A one end and the gas phase mouth master control close to booster one end of unloading
Valve a.
Further, connected between the input of the LNG tank cars gas phase pipe and the output end of the LNG tank cars liquid-phase tube
There is control valve e.
Further, the described pipe unloading system of LNG filling stations two also includes storage tank B, the storage tank A and the storage tank B
It is parallel with one another, the gaseous phase outlet at the top of storage tank B be connected with the gaseous phase outlet of the booster of unloading after again with the LNG tank cars gas
The input of phase pipe is connected, the gas phase pipe that the gaseous phase outlet at the top of storage tank B is connected with the gaseous phase outlet of the booster of unloading
Road is provided with storage tank B gas phase mouth valves h.
Further, the feed tube of the storage tank B unloads liquid pipe string by storage tank B liquid phases inlet valve i and the LNG
Connection, and it is in parallel with the feed tube of the storage tank A.
Further, the liquid-phase outlet of the storage tank B bottoms is connected with the fluid inlet of the booster of unloading, and even
The pipeline connect is provided with the storage tank B liquid phase liquid outlet valves j close to storage tank B one end.
The beneficial effects of the utility model are：Compared with prior art, the utility model is carried out using two pipe unloading ways
Unload, contrasted with immersed pump unloading way, it is therefore prevented that pollution of the discharge by pump to LNG storage tanks, it is ensured that LNG is pure from supercharging
Degree, and accelerate and unload vehicle speed, the time of unloading is saved, potential safety hazard is reduced；Contrast, simplify with three pipe unloading ways
Traditional unloading system, first passes through the pressure of balancing tank and tank car when unloading, decline pressure of storage tank fast, tank car pressure boost
Rapidly, so as to reach the purpose of Quick-unloading, the LNG wastes during unloading are reduced；It is additionally, since two pipe and unloads and is
LNG in another storage tank can after booster gasification of unloading be tank car supercharging by system, thus pit of unloading it is in-car almost without
Remaining LNG, enables supply and marketing difference to greatly reduce, and improves quality of unloading, and saves production cost.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the connection diagram of the utility model embodiment.
Embodiment
The technical scheme in the utility model embodiment will be clearly and completely described below, it is clear that described
Embodiment is only a part of embodiment of the present utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to
The scope of the utility model protection.
The utility model embodiment includes：
As shown in figure 1, a kind of pipe unloading system of LNG filling stations two, including at least one storage tank A1, LNG tank car 4 and unload
Car booster 3, gas phase mouth 42, liquid of the LNG tank cars 4 provided with diffusion mouth 41, gas phase mouth 42 and liquid phase mouthful 43, LNG tank cars 4
The input respectively with gas phase pipe 5 of phase mouthfuls 43, the output end of liquid-phase tube 6 are connected, the input of the gas phase pipe 5 of LNG tank cars 4 and
Control valve e 7 is in series between the output end of the liquid-phase tube 6 of LNG tank cars 4；Gaseous phase outlet at the top of storage tank A1 is unloaded with described
Input after the gaseous phase outlet of car booster 3 is connected again with the gas phase pipe 5 of LNG tank cars 4 is connected, the tops of storage tank A 1
The gas phase pipeline that is connected with the gaseous phase outlet for unloading booster 3 of gaseous phase outlet be provided with storage close to the one end of storage tank A 1
The tank A gas phase mouth valves b 11 and gas phase mouth master control valve a 51 close to one end of booster 3 of unloading；The booster of unloading
3 fluid inlet passes through liquid phase pipeline liquid-phase outlet respectively with the bottoms of storage tank A 1, the liquid phase mouthful master control valve f 61
Output end is connected, and storage tank A liquid phase liquid outlet valves are respectively equipped with the liquid phase pipeline of the fluid inlet both sides of booster 3 of unloading
Door d 13, LNG tank car liquid phase liquid outlet valves g 9；The liquid-phase tube 6 of LNG tank cars 4 includes and the liquid-phase tube 6 of LNG tank cars 4
A piece LNG of output end series connection unloads liquid pipe 8, and the LNG tank cars 4 unload liquid pipe 8 by the LNG and connect entering for the storage tank A 1
Liquid pipe, in the output end of 4 liquid-phase tube of LNG tank cars 6 provided with liquid phase mouthful master control valve f 61, the LNG unloads liquid pipe 8 and is connected to institute
Two liquid-phase tube parallel connections of the fluid inlet for booster 3 of unloading are stated, the feed tube of the storage tank A 1 enters provided with storage tank A liquid phases
Liquid mouthful valve c 12.
In order to improve unload efficiency and the quality of unloading of tank car, the described pipe unloading system of LNG filling stations two also includes storage
Tank B2, the storage tank A1 and the storage tank B2 is parallel with one another, the gas of the gaseous phase outlet at the top of storage tank B2 and the booster 3 of unloading
Input again with the gas phase pipe 5 of LNG tank cars 4 after being connected mutually is exported to be connected, the gaseous phase outlet at the top of storage tank B2 with it is described
The connected gas phase pipeline of gaseous phase outlet of booster 3 of unloading is provided with storage tank B gas phase mouth valves h 21, the feed liquor of the storage tank B2
Pipe unloads liquid pipe 8 with the LNG by storage tank B liquid phase inlet valves i 22 and connected, and with the feed tube of the storage tank A 1 simultaneously
Connection, the liquid-phase outlet of the bottoms of storage tank B 2 is connected with the fluid inlet for unloading booster 3, and on the pipeline of connection
Provided with the storage tank B liquid phase liquid outlet valves j 23 close to the one end of storage tank B 2.
When storage tank A is slack tank（In the presence of a small amount of LNG and more BOG, pressure is about in 0.6-0.7 MPa）, it is equipped with storage tank B
LNG liquid is, it is necessary to which the LNG in LNG tank cars is unloaded into storage tank A, and the pressure of LNG tank cars is general in 0.1 MPa.Now two pipes are unloaded
Car system operation methods are：1. closing valve f, h, i and d, valve b, a and e are opened, the diffusion mouth valve of LNG tank cars is then opened
Door, the air for pipe of unloading in purging displacement, cleared pipe of unloading be detained using the BOG in storage tank A；2. after the completion of displacement,
The diffusion mouth valve of LNG tank cars is closed, valve e is closed, storage tank A pressure is reached balance with the pressure of LNG tank cars, now stores up
Tank A's drops to 0.3-0.4 MPa；3. after concora crush, close valve a, Open valve c, f, make LNG tank cars LNG unload liquid pipe with
Storage tank A feed tube is connected；Then valve g and j are opened, is after booster gasification of unloading using the LNG in storage tank B
LNG tank cars are pressurized；4. after LNG tank car pressure rises, as long as its pressure correspondingly greater than 0.3-0.4 MPa, LNG tank cars can
So that LNG is discharged in storage tank A automatically using pressure differential.
The beneficial effects of the utility model are：Compared with prior art, the utility model is carried out using two pipe unloading ways
Unload, contrasted with immersed pump unloading way, it is therefore prevented that pollution of the discharge by pump to LNG storage tanks, it is ensured that LNG is pure from supercharging
Degree, and accelerate and unload vehicle speed, the time of unloading is saved, potential safety hazard is reduced；Contrast, simplify with three pipe unloading ways
Traditional unloading system, first passes through the pressure of balancing tank and tank car when unloading, decline pressure of storage tank fast, tank car pressure boost
Rapidly, so as to reach the purpose of Quick-unloading, the LNG wastes during unloading are reduced；It is additionally, since two pipe and unloads and is
LNG in another storage tank can after booster gasification of unloading be tank car supercharging by system, thus pit of unloading it is in-car almost without
Remaining LNG, enables supply and marketing difference to greatly reduce, and improves quality of unloading, and saves production cost.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalent structure or equivalent flow conversion made using the utility model description, or directly or indirectly it is used in other phases
The technical field of pass, is similarly included in scope of patent protection of the present utility model.
Claims (8)
1. a kind of pipe unloading system of LNG filling stations two, including at least one storage tank A, LNG tank car and booster of unloading, it is special
Levy and be, the LNG tank cars provided with diffusion mouth, gas phase mouth and liquid phase mouthful, the gas phase mouths of LNG tank cars, liquid phase mouth respectively with gas
The input of phase pipe, the output end of liquid-phase tube are connected, the gaseous phase outlet of the gaseous phase outlet at the top of storage tank A and the booster of unloading
Input after being connected again with the LNG tank cars gas phase pipe is connected；The LNG tank cars liquid-phase tube includes and the LNG tank cars liquid
A piece LNG of phase pipe output end series connection unloads liquid pipe, and the LNG tank cars unload the feed liquor that liquid pipe connects the storage tank A by the LNG
Pipe, in LNG tank car liquid-phase tubes output end provided with liquid phase mouthful master control valve f.
2. a kind of pipe unloading system of LNG filling stations two according to claim 1, it is characterised in that the booster of unloading
The fluid inlet output end phase that passes through liquid-phase tube liquid-phase outlet respectively with storage tank A bottoms, the liquid phase mouthful master control valve f
Connect, and storage tank A liquid phase liquid outlet valve d, LNG grooves are respectively equipped with the liquid phase pipeline of the booster fluid inlet both sides of unloading
Car liquid phase liquid outlet valve g.
3. the pipe unloading system of a kind of LNG filling stations two according to claim 1 or 2, it is characterised in that the LNG unloads liquid
Two liquid-phase tubes for managing fluid inlet with being connected to the booster of unloading are in parallel, and the feed tube of the storage tank A is provided with storage
Tank A liquid phase inlet valves c.
4. the pipe unloading system of a kind of LNG filling stations two according to claim 1, it is characterised in that at the top of the storage tank A
The gas phase pipeline that gaseous phase outlet is connected with the gaseous phase outlet of the booster of unloading is provided with the storage tank A gas close to storage tank A one end
The phase mouthful valve b and gas phase mouth master control valve a close to booster one end of unloading.
5. a kind of pipe unloading system of LNG filling stations two according to claim 1, it is characterised in that the LNG tank cars gas phase
Control valve e is in series between the output end of the input of pipe and the LNG tank cars liquid-phase tube.
6. a kind of pipe unloading system of LNG filling stations two according to claim 1, it is characterised in that described LNG filling stations
Two pipe unloading systems are also parallel with one another including storage tank B, the storage tank A and the storage tank B, gaseous phase outlet and institute at the top of storage tank B
State booster of unloading gaseous phase outlet be connected after input again with the LNG tank cars gas phase pipe be connected, the gas at the top of storage tank B
Mutually export the gas phase pipeline being connected with the gaseous phase outlet of the booster of unloading and be provided with storage tank B gas phase mouth valves h.
7. a kind of pipe unloading system of LNG filling stations two according to claim 6, it is characterised in that the feed liquor of the storage tank B
Pipe unloads liquid pipe with the LNG by storage tank B liquid phases inlet valve i and connected, and in parallel with the feed tube of the storage tank A.
8. the pipe unloading system of a kind of LNG filling stations two according to claim 6, it is characterised in that the storage tank B bottoms
Liquid-phase outlet is connected with the fluid inlet of the booster of unloading, and provided with the storage close to storage tank B one end on the pipeline of connection
Tank B liquid phase liquid outlet valves j.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720232999.1U CN206582524U (en) | 2017-03-10 | 2017-03-10 | A kind of pipe unloading system of LNG filling stations two |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720232999.1U CN206582524U (en) | 2017-03-10 | 2017-03-10 | A kind of pipe unloading system of LNG filling stations two |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206582524U true CN206582524U (en) | 2017-10-24 |
Family
ID=60111869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720232999.1U Active CN206582524U (en) | 2017-03-10 | 2017-03-10 | A kind of pipe unloading system of LNG filling stations two |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206582524U (en) |
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2017
- 2017-03-10 CN CN201720232999.1U patent/CN206582524U/en active Active
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