CN208268774U - A kind of liquefied gas at low temp charging system - Google Patents
A kind of liquefied gas at low temp charging system Download PDFInfo
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- CN208268774U CN208268774U CN201820515407.1U CN201820515407U CN208268774U CN 208268774 U CN208268774 U CN 208268774U CN 201820515407 U CN201820515407 U CN 201820515407U CN 208268774 U CN208268774 U CN 208268774U
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- storage tank
- charging system
- regenerator
- gas
- room temperature
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Abstract
The utility model discloses a kind of liquefied gas at low temp charging systems, belong to pressure conveying technology field, including the first storage tank and the second storage tank, first storage tank and the second storage tank lower end and dispenser piping connection, first storage tank and the second storage tank upper end and regenerator piping connection, side far from the first storage tank and the second storage tank on regenerator is connected with room temperature pressure charging system, and the cryogenic gas in any of the first storage tank and the second storage tank storage tank enters room temperature pressure charging system from regenerator.The technical solution sucks the cryogenic gas in one of storage tank by compressor, compresses after being warming up to room temperature, forms low temperature high pressure gas by heat exchange after pressurization, another storage tank is pressurized again, realize the force feed of liquefied gas, equipment installation cost is low, and service life improves.
Description
Technical field
The utility model relates to a kind of liquefied gas at low temp charging systems, belong to pressure conveying technology field.
Background technique
In recent years, the production and trade of liquefied natural gas (LNG) become increasingly active, and are becoming the new heat of world's oil and gas industry
Point.To guarantee energy supply diversification and improving energy consumption structure, some energy-consuming big countries increasingly pay attention to drawing for LNG
Into LNG will become next global popular energy commodity fought for after petroleum.LNG is greatly developed in China, it can be in very great Cheng
Make up that petroleum resources are insufficient, guarantee the diversification of energy supply, step up China's environmental quality on degree, and to the west in China
The defeated engineering in gas east can also play complementation.
In the prior art, the pressure of liquefied gas at low temp is conveyed, is generally pressurizeed by cryogenic pump to subcooled liquid defeated
It send.For example, generalling use cryogenic pump in conventional LNG gas station and carrying out adherence pressure to additional gas.Using cryogenic pump
In LNG gas station, subcooled liquid LNG by cryogenic pump pressurize after by metering by dispenser to refueling.Using cryogenic pump
Higher cost, and the LNG flash steam (BOG) generated in fueling process cannot be fully utilized, resource utilization is not high.Therefore it designs
The liquefied gas at low temp charging system that a kind of cost is reasonable, resource utilization is high, is of great significance.
Summary of the invention
To solve problems of the prior art, the utility model provides a kind of liquefied gas at low temp charging system,
Progress liquefied gas at low temp can be pressurized at normal temperature to fill.Specific technical solution is as follows:
A kind of liquefied gas at low temp charging system, including the first storage tank and the second storage tank, first storage tank and the second storage
Tank lower end and dispenser piping connection, first storage tank and the second storage tank upper end and regenerator piping connection, the regenerator
The upper side far from the first storage tank and the second storage tank is connected with room temperature pressure charging system, any in first storage tank and the second storage tank
Cryogenic gas in a storage tank enters room temperature pressure charging system from regenerator, by room temperature pressure charging system rise to room temperature and be pressurized,
Force feed is carried out to another storage tank using regenerator.
As an improvement of the above technical solution, the room temperature pressure charging system includes the first air temperature type heater, the second air temperature
Formula heater, four-way reversing valve, compressor and check valve.
As an improvement of the above technical solution, the room temperature pressure charging system further includes cooling device and oil return apparatus, gas
Successively through apparatus for supercooling and oil return apparatus, then from oil return apparatus return four-way reversing valve after compressor compresses.
As an improvement of the above technical solution, the oil return apparatus is connected to compressor circuit.
As an improvement of the above technical solution, return-air rifle, the return-air rifle and regenerator are connected with below the dispenser
Between be provided in parallel the first valve and the second valve, the gas in the return-air rifle imports second after the first valve and stores up
Pipeline between tank and regenerator, the gas in the return-air rifle are imported after the second valve between the first storage tank and regenerator
Pipeline.
Above-mentioned technical proposal devises interconnected the first storage tank and the second storage tank, sucks one of them by compressor
Cryogenic gas in storage tank compresses after being warming up to room temperature, forms low temperature high pressure gas by heat exchange after pressurization, then to another storage
Tank is pressurized, and realizes the force feed of liquefied gas, and equipment installation cost is low, and service life improves.
Detailed description of the invention
Fig. 1 is a kind of pipeline schematic diagram of liquefied gas at low temp charging system of the utility model.
Specific embodiment
As shown in Figure 1, the utility model provides a kind of liquefied gas at low temp charging system, including the first storage tank 13 and
Two storage tanks 15, the first storage tank 13 and 15 lower end of the second storage tank and 17 piping connection of dispenser, the first storage tank 13 and the second storage tank 15
Upper end and 9 piping connection of regenerator, the side far from the first storage tank 13 and the second storage tank 15 is connected with room temperature pressurization on regenerator 9
System, the cryogenic gas in any of the first storage tank 13 and the second storage tank 15 storage tank enter room temperature pressurization system from regenerator 9
System, by room temperature pressure charging system rise to room temperature and be pressurized, using regenerator 9 to another storage tank carry out force feed.
Room temperature pressure charging system includes the first air temperature type heater 7, the second air temperature type heater 8, four-way reversing valve 6, compression
Machine 1 and check valve 3, wherein on compressor 1 can by pipeline parallel connection auxiliary compressor 2, compressor 1 and auxiliary compressor 2
Power is different, and when use selectively unlocks corresponding compressor, good energy saving performance as needed.
Room temperature pressure charging system further includes cooling device 4 and oil return apparatus 5, and gas successively passes through after the compression of compressor 1
Then cooling device 4 and oil return apparatus 5 from oil return apparatus 5 return to four-way reversing valve 6.The oil return apparatus 5 is managed with compressor 1
Road connection.
Below by liquefied natural gas be fill for be illustrated, specifically fill that steps are as follows:
Step 1, cryogenic gas heating store low-temperature liquefaction natural gas in the first storage tank 13 and the second storage tank 15, and first
At least one operating pressure will appoint in 1.2MPa or more in the first storage tank 13 and the second storage tank 15 in storage tank 13 and the second storage tank 15
Low-temperature liquefaction natural gas in one storage tank is heated up by regenerator 9, regenerator 9 can be such as shell-and-tube heat exchanger or
It is different into the pipeline of regenerator 9 on the heat-exchanger rigs such as person's plate-fin heat exchanger, the first storage tank 13 and the second storage tank 15；
Step 2, room temperature pressure-increasing unit, room temperature pressure charging system include the first air temperature type heater 7, the heating of the second air temperature type
Device 8, four-way reversing valve 6, compressor 1, check valve 3, cooling device 4 and oil return apparatus 5, it is natural after the heating of regenerator 9
Gas enters the first air temperature type heater 7 or the second air temperature type heater 8, is further heated to room temperature, is pressurized by compressor 1
It is discharged afterwards from check valve 3, successively through apparatus for supercooling 4 and oil return apparatus 5, then returns to four-way reversing valve 6 from oil return apparatus 5,
Oil return apparatus 5 and 1 pipeline connection of compressor；
In the step, four-way reversing valve 6 can be replaced by two triple valves or four two-port valves, four-way reversing valve
Four channels be separately connected the first air temperature type heater 7, the second air temperature type heater 8, compressor 1 and oil return apparatus 5, first
Air temperature type heater 7 and the second air temperature type heater 8 can be using existing air temperature type heater, electric heating, heating water baths etc.
Other heating devices, cooling device 4 can use the cooling structures such as water cooling, air-cooled；
Cryogenic natural gas in first storage tank 13 first passes around the heat transfer heating of regenerator 9, not using four-way reversing valve control
With the opening and closing in channel, guides natural gas to enter compressor 1 from the first air temperature type heater 7, cooling is entered by check valve 3
Device 4, cooling device 4 can radiate to ambient enviroment, so as to become normal temperature high voltage natural for compressed high temperature and pressure natural gas
Gas, then natural gas enters the second air temperature type heater 8 by oil return apparatus 5, and oil return apparatus 5 has effectively recycled compressor 1
Institute's entrained oil in gas is discharged, the work of oil return apparatus 5 is in room temperature warm area, and without insulation and rewarming measure, last natural gas is returned
To regenerator 9 is passed through, being cooled down by regenerator 9, regenerator 9 can use cryogenic regenerator, cold energy can be sufficiently recycled,
Then compressed natural gas enters the force feed that the second storage tank 15 carries out liquefied natural gas；Utilize the low temperature in the second storage tank 15
The process of natural gas force feed into the first storage tank 13 is similar to the above process；
Step 3, gas cooling force feed, compressed natural gas are transported to another storage tank after the cooling of regenerator 9
It is interior, the liquefied gas at low temp in another storage tank is sent to dispenser 17, dispenser 17 can be similar to liquefied natural gas
Dispenser or other gas filling equipment in the prior art, be connected with liquid feeding rifle 19 and return-air rifle 18 on dispenser 17, pass through
Liquid feeding rifle 19 will supercooling liquefaction natural gas charging to user, the flash steam generated in filling process is recycled by return-air rifle 18, time
The first valve 10 and the second valve 11 in parallel is provided between air gun 18 and regenerator 9, the gas in return-air rifle 18 is by the
The pipeline between the second storage tank 15 and regenerator 9 is imported after one valve 10, the gas in return-air rifle 18 is after the second valve 11
Import the pipeline between the first storage tank 13 and regenerator 9.Wherein, return-air rifle 18 can recycle the flash distillation generated in filling process
Vapour, flash steam are mixed with the cryogenic natural gas in the first storage tank 13 or the second storage tank 15 of step 1 after entering regenerator 9
It closes, has effectively recycled liquefied natural gas flash steam.
In step 3, the cryogenic liquid in the first storage tank 13 and the second storage tank 15 in any one storage tank is in the first storage tank
13 or 15 top of the second storage tank high-pressure gas pressure under be transported in dispenser 17, dispenser 17 gives low-temperature liquid filling
User, the flash steam that filling process generates is sucked by compressor 1 to be compressed.The flash steam that compressor 1 generates during being filled with is inhaled
Enter the heating of regenerator 9, enters back into the first air temperature type heater 7 or the further re-heat of the second air temperature type heater 8, compressed later
The sucking compression of machine 1, the high temperature and pressure natural gas by pressurization is cooling in cooling device 4, becomes to ambient enviroment release heat
The natural gas of normal temperature high voltage, it is empty using the first air temperature type heater 7 or second through four-way reversing valve 6 into oil return apparatus 5
Warm formula heater 8 enters the heat exchange of regenerator 9, and the natural gas of last cryogenic high pressure enters the top of another storage tank.The step
In rapid, by the compressed natural gas of compressor 1 when by the first air temperature type heater 7 or the second air temperature type heater 8, the
One air temperature type heater 7 or the second air temperature type heater 8 are only as piping connection to regenerator 9.
Above-mentioned charging system can be applied to existing liquefied natural gas station or the liquefaction of other cryogenic liquids fills, such as
The gases such as inert gas, hydrogen, nitrogen fill, can be by a storage tank in two storage tanks in gas replenishment process
Cryogenic gas is pressurized after it is converted into room temperature by regenerator, and exchanges heat into low temperature high pressure gas again to another storage tank
Pressurization, realizes the force feed of liquefied gas at low temp.Since the system is pressurized at normal temperature, it is different under existing cryogenic conditions
Force feed is carried out with pump, design installation cost is lower.And the flash steam generated in liquefied gas at low temp filling process can be returned
It receives and utilizes, improve the utilization rate of resource.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to the utility model and want
Seek the range of protection.
Claims (5)
1. a kind of liquefied gas at low temp charging system, which is characterized in that including the first storage tank and the second storage tank, first storage tank
With the second storage tank lower end and dispenser piping connection, first storage tank and the second storage tank upper end and regenerator piping connection, institute
It states the side far from the first storage tank and the second storage tank on regenerator and is connected with room temperature pressure charging system, first storage tank and the second storage
Cryogenic gas in any of tank storage tank enters room temperature pressure charging system from regenerator, rises to room temperature by room temperature pressure charging system
And it is pressurized, force feed is carried out to another storage tank using regenerator.
2. a kind of liquefied gas at low temp charging system as described in claim 1, which is characterized in that the room temperature pressure charging system packet
Include the first air temperature type heater, the second air temperature type heater, four-way reversing valve, compressor and check valve.
3. a kind of liquefied gas at low temp charging system as claimed in claim 2, which is characterized in that the room temperature pressure charging system is also
Including cooling device and oil return apparatus, gas after compressor compresses successively through apparatus for supercooling and oil return apparatus, then from
Oil return apparatus returns to four-way reversing valve.
4. a kind of liquefied gas at low temp charging system as claimed in claim 3, which is characterized in that the oil return apparatus and compression
Machine pipeline connection.
5. a kind of liquefied gas at low temp charging system as described in claim 1, which is characterized in that connection below the dispenser
There is return-air rifle, be provided with the first valve and the second valve in parallel between the return-air rifle and regenerator, in the return-air rifle
Gas imports the pipeline between the second storage tank and regenerator after the first valve, and the gas in the return-air rifle passes through the second valve
The pipeline between the first storage tank and regenerator is imported behind the door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820515407.1U CN208268774U (en) | 2018-04-11 | 2018-04-11 | A kind of liquefied gas at low temp charging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820515407.1U CN208268774U (en) | 2018-04-11 | 2018-04-11 | A kind of liquefied gas at low temp charging system |
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| CN208268774U true CN208268774U (en) | 2018-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278482A (en) * | 2018-04-11 | 2018-07-13 | 青岛乐戈新能源科技有限公司 | A kind of liquefied gas at low temp charging system, methods for filling |
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2018
- 2018-04-11 CN CN201820515407.1U patent/CN208268774U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278482A (en) * | 2018-04-11 | 2018-07-13 | 青岛乐戈新能源科技有限公司 | A kind of liquefied gas at low temp charging system, methods for filling |
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