CN205746013U - A kind of LNG loading system - Google Patents
A kind of LNG loading system Download PDFInfo
- Publication number
- CN205746013U CN205746013U CN201620426589.6U CN201620426589U CN205746013U CN 205746013 U CN205746013 U CN 205746013U CN 201620426589 U CN201620426589 U CN 201620426589U CN 205746013 U CN205746013 U CN 205746013U
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- Prior art keywords
- valve
- storage tank
- lng
- liquid
- flow container
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of LNG loading system, including tank car, by unloading low-temperature liquid storage tank, the LNG liquid addition machine that liquid valve is connected with tank car, characterized by further comprising and add flow container, gas compressor, export, with gas compressor, the air accumulator that is connected, tank car is connected with air accumulator by tank car charge valve, low-temperature liquid storage tank is connected with gas compressor import by storage tank recovery valve, low-temperature liquid storage tank is connected with air accumulator by storage tank charge valve, add flow container to be connected with gas compressor import by liquid feeding recovery valve, add flow container and be connected with air accumulator by liquid feeding charge valve；Low-temperature liquid storage tank is connected by replenishing valve with adding flow container, adds flow container and is connected by charging valve with LNG liquid addition machine；This utility model has the advantage that equipment investment is little, easy to operate, emission loss is little, safety is good, and operating cost is low, easy to maintenance.
Description
Technical field
This utility model relates to a kind of LNG loading system.
Background technology
Existing LNG filling station typically uses self pressurized vaporizer and immersed pump to unload liquid when unloading liquid, when externally filling one
As use immersed pump filling, and when tank car pressure, fluid reservoir pressure all reach or during close to its maximum working pressure, system without
Method carries out self pressurized vaporizer, and immersed pump can only be used to unload liquid.
Due to above reason, therefore immersed pump becomes one of necessary equipment into LNG loading system.But, the pump of immersed pump
Body and motor operationally must all be immersed in LNG liquid, all must be first by pump pond once breaking down or needing to safeguard
And the pipeline being attached thereto is vented and heats up, thus it is let go after causing substantial amounts of LNG gasification, and time-consuming extremely long, operation complexity,
Typically carried out by the after-sale service personnel of pump manufacturer man, in turn result in great economic loss and the time is wasted, and in a large number
Discharge LNG will also result in certain potential safety hazard.
Current domestic immersed pump, because of the reason (mainly motor, bearing etc.) of manufacture level, there is no the product that quality is really up to the mark,
The almost all of complete producer of LNG loading system in native land all uses the imported product such as U.S. ACD, France CryoStar, this
A little imported product prices are the highest, and its accessory is the most expensive, and delivery cycle is long, and cost pressure is big.
Summary of the invention
The purpose of this utility model is for deficiencies of the prior art, it is provided that a kind of LNG loading system, its tool
There is the advantage that equipment investment is little, easy to operate, emission loss is little, safety is good, and operating cost is low, easy to maintenance.
For reaching above-mentioned purpose, a kind of LNG loading system of the present utility model, including tank car, by unloading liquid valve and tank car
The low-temperature liquid storage tank that is connected, LNG liquid addition machine, it is characterised in that also include adding flow container, gas compressor and gas compressor outlet
The air accumulator being connected, tank car is connected with air accumulator by tank car charge valve, and low-temperature liquid storage tank is by storage tank recovery valve and gas pressure
Contracting machine import is connected, and low-temperature liquid storage tank is connected with air accumulator by storage tank charge valve, adds flow container by liquid feeding recovery valve and gas
Compressor inlet is connected, and adds flow container and is connected with air accumulator by liquid feeding charge valve；Low-temperature liquid storage tank passes through replenishing valve with adding flow container
It is connected, adds flow container and be connected by charging valve with LNG liquid addition machine；
This utility model is by the boil-off gas (BOG of LNG in a liquid container in gas compressor regulation LNG loading system
Gas) pressure, make LNG liquid flow to receive container from out-put container under the effect of pressure reduction, by the timely adjustment of compressor,
Can persistently ensure out-put container and the pressure differential received between container, until liquid conveying is complete；Owing to not using immersed pump,
Equipment investment is little, and compressor etc. is matured product, and stable and reliable operation, expense are low, easy to operate, and not with LNG Low Temperature Liquid
Body contacts, and carries out maintenance and repair operation at any time；In system, the boil-off gas of LNG is recycled, it is to avoid make from supercharging
The a large amount of LNG gasification become, do not have the operations such as immersed pump pre-cooling yet, decrease the big link that LNG boil-off gas produces so that this is
System externally discharges almost without LNG boil-off gas, i.e. safety is saved again；
As further improvement of the utility model, tank car is connected with gas compressor import by tank car recovery valve；?
After having unloaded, also the LNG boil-off gas in tank car can be recovered in air accumulator, to improve hydraulic force；
In sum, this utility model has the advantage that equipment investment is little, easy to operate, emission loss is little, safety is good,
And operating cost is low, easy to maintenance.
Accompanying drawing explanation
Fig. 1 is the structure diagram of this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in further detail.
As it is shown in figure 1, this LNG loading system, including tank car 1, by unloading the low-temperature liquid storage tank that liquid valve 13 is connected with tank car 1
2, LNG liquid addition machine 6, add flow container 3, gas compressor 5, export, with gas compressor 5, the air accumulator 4 that is connected, tank car 1 passes through tank car
Charge valve 7 is connected with air accumulator 4, and tank car 1 is connected with gas compressor 5 import by tank car recovery valve 10, and low-temperature liquid storage tank 2 leads to
Crossing storage tank recovery valve 8 to be connected with gas compressor 5 import, low-temperature liquid storage tank 2 is connected with air accumulator 4 by storage tank charge valve 9, adds
Flow container 3 is connected with gas compressor 5 import by liquid feeding recovery valve 11, adds flow container 3 by liquid feeding charge valve 12 and air accumulator 4 phase
Even；Low-temperature liquid storage tank 2 is connected by replenishing valve 14 with adding flow container 3, adds flow container 3 and is connected by charging valve 15 with LNG liquid addition machine 6；
Use process of the present utility model is as follows: flow process of unloading
After system connects, start gas compressor 5 and open tank car charge valve 7, storage tank recovery valve 8, now ensureing groove
Interior pressure is more than low temperature liquid storage less than LNG boil-off gas pressure in providing gas compressor 5 to maintain tank car in the case of the upper limit
Pressure 0.2～0.6MPa in tank 2, then open and unload liquid valve 13 and start to unload；Unsnatch in tank car 1 in liquid or low-temperature liquid storage tank 2
When liquid level reaches the upper limit, turn off and unload liquid valve 13, storage tank recovery valve 8 and tank car charge valve 7, then open tank car recovery valve 10 and storage
In tank charge valve 9 starts to say tank car 1, LNG boil-off gas reclaims, it is ensured that in low-temperature liquid storage tank 2, pressure is 0.6～0.8MPa(normal work
It is 0.4～1.0MPa as pressure), closing storage tank charge valve 9, in now excessive gas is stored in air accumulator 4, until tank car 1
Interior pressure is less than 0.4MPa, turns off tank car recovery valve 10, then stops gas compressor 5, and terminate to unload flow process；
Add flow container prepackage
When the liquid level added in flow container 3 is less than lower limit, gas compressor 5, opens liquid feeding recovery valve 11 and make to add in flow container 3
Pressure is less than low-temperature liquid storage tank 2 pressure maintaining, then opens replenishing valve 14 and start topping up, until in adding flow container 3, liquid level arrives
Close replenishing valve 14 in limited time, turn off liquid feeding recovery valve 11, stop gas compressor 5, then open liquid feeding charge valve 12, air accumulator
Gases at high pressure in 4 enter and add flow container 3 and make to add the pressure in flow container 3 and maintain 1.4～1.6MPa, add flow container and pre-installs, pass
Close replenishing valve 14, at any time can external liquid feeding；
Liquid feeding flow process
Feedback signal according to liquid filler 6 opens charging valve 15, by liquid filler 6 LNG automobile carries out liquid feeding, and at any time
Detection adds the pressure of flow container 3, then opens aerating replenishing valve 12 QI invigorating when pressure is less than 1.4MPa, liquid feeding complete after according to liquid feeding, 6
Feedback signal close charging valve 15, liquid feeding flow process completes, system standby.
This utility model regulates in LNG loading system LNG boil-off gas (BOG gas in a liquid container by gas compressor 5
Body) pressure, make LNG liquid flow to receive container from out-put container under the effect of pressure reduction, by the in good time tune of gas compressor 5
Joint, can persistently ensure out-put container and the pressure differential received between container, until liquid conveying is complete；Owing to not using latent liquid
Pump, equipment investment is little, and gas compressor 5 etc. is matured product, and stable and reliable operation, expense are low, easy to operate, and not with
LNG cryogenic liquid contacts, and carries out maintenance and repair operation at any time；In system, the boil-off gas of LNG is recycled, it is to avoid
The a large amount of LNG gasification caused from supercharging, do not have the operations such as immersed pump pre-cooling yet, decrease the big link that LNG boil-off gas produces,
Native system is externally discharged almost without LNG boil-off gas, i.e. safety is saved again.
Claims (2)
1. a LNG loading system, including tank car, by unloading low-temperature liquid storage tank, the LNG liquid addition machine that liquid valve is connected with tank car, its
Being characterised by also including adding flow container, gas compressor, exporting, with gas compressor, the air accumulator being connected, tank car is inflated by tank car
Valve is connected with air accumulator, and low-temperature liquid storage tank is connected with gas compressor import by storage tank recovery valve, and low-temperature liquid storage tank is by storage
Tank charge valve is connected with air accumulator, adds flow container and is connected with gas compressor import by liquid feeding recovery valve, adds flow container and pass through liquid feeding
Charge valve is connected with air accumulator；Low-temperature liquid storage tank is connected by replenishing valve with adding flow container, adds flow container and passes through liquid feeding with LNG liquid addition machine
Valve is connected.
2. a kind of LNG loading system as claimed in claim 1, it is characterised in that tank car passes through tank car recovery valve and gas compression
Machine import is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620426589.6U CN205746013U (en) | 2016-05-12 | 2016-05-12 | A kind of LNG loading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620426589.6U CN205746013U (en) | 2016-05-12 | 2016-05-12 | A kind of LNG loading system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205746013U true CN205746013U (en) | 2016-11-30 |
Family
ID=57368674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620426589.6U Expired - Fee Related CN205746013U (en) | 2016-05-12 | 2016-05-12 | A kind of LNG loading system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205746013U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676623A (en) * | 2017-11-06 | 2018-02-09 | 成都华气厚普机电设备股份有限公司 | A kind of differential LNG loading systems |
-
2016
- 2016-05-12 CN CN201620426589.6U patent/CN205746013U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676623A (en) * | 2017-11-06 | 2018-02-09 | 成都华气厚普机电设备股份有限公司 | A kind of differential LNG loading systems |
| CN107676623B (en) * | 2017-11-06 | 2023-08-22 | 厚普清洁能源(集团)股份有限公司 | Differential pressure type LNG filling system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 |