CN205618973U - LNG station of self -supporting formula - Google Patents
LNG station of self -supporting formula Download PDFInfo
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- CN205618973U CN205618973U CN201620485329.6U CN201620485329U CN205618973U CN 205618973 U CN205618973 U CN 205618973U CN 201620485329 U CN201620485329 U CN 201620485329U CN 205618973 U CN205618973 U CN 205618973U
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- lng
- heat exchanger
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- station
- gas
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Abstract
The utility model discloses a LNG station of self -supporting formula, including LNG storage tank, gas turbine generator and receive the station in -fighting electric installation of gas turbine generator power supply, still be equipped with the BOG loss recovery device, the BOG loss recovery device includes that compressor, heat exchanger, LNG retrieve jar and LNG gasification surge tank. The utility model discloses a heat exchanger is two heat exchangers of shell -and -tube, utilizes pneumatolytic nitrogen gas to carry out the precooling to the gas after compressing in the first heat exchanger, plays the effect of stabiliser, makes BOG's liquefaction go on under a condition that mitigatees relatively, has prolonged the life of equipment, the utility model discloses retrieve BOG, be used for the standing electricity generation supply of in -fighting electric installation of the LNG that obtains realizes BOG residual air recycle, reaches the purpose of energy -conservation, environmental protection.
Description
Technical field
This utility model relates to liquefaction device technical field, is specifically related to a kind of self contained LNG station.
Background technology
Liquefied natural gas (LNG) is the liquified natural gas that natural gas is formed after purification and condensation liquefaction, is that one can be advised greatly
The clean energy resource that mould utilizes, is widely used in national economy.LNG is as the vehicle fuel of high-quality, with vehicle fuel phase
Ratio, has the advantages such as octane number is high, anti-knock properties are good, burning is complete, exhaust pollution is few, engine life length, operating cost are low.
Compared with compressed natural gas, then there is efficiency of storage high, the advantages such as continual mileage is long, and storage bottle pressure is low, lightweight, quantity is little.
Development LNG is accomplished by auxiliary construction LNG Vehicle Fueling Station as motor vehicle fuel.And LNG gas station is inevitable
Cryogenic gas (BOG) can be produced.BOG is that LNG stores and during operation, and part LNG is evaporated, the flash steam of generation.
It is mainly composed of methane, is the gas that a kind of greenhouse effect is the strongest, as being discharged in air by BOG, not only causes serious
Greenhouse effect, simultaneously also make clean energy resource waste.BOG is directly carried out at emptying by domestic a lot of small-sized LNG gas station
Reason, the most not only causes the biggest environmental pollution, and adds the potential safety hazard of LNG gas station.
The most domestic recycling for LNG gas station BOG has the most several:
(1), after BOG being compressed to certain pressure by compressor, the most directly contact with the LNG of output
Heat exchange, is condensed into LNG outer defeated.
(2) directly BOG is compressed by compressor, after reaching outer defeated pipe network desirable pressure, flow to pipeline network of fuel gas in city.
Application publication number is that the patent documentation of CN 105318190 A discloses a kind of BOG liquefaction recovery system and method.BOG
Liquefaction recovery system is for reclaiming the BOG produced by LNG storage tank, including compressor, liquefying plant, medium pipeline and control
System.Liquefying plant includes liquid nitrogen storage and the heat exchanger tube being loaded with liquid nitrogen；First medium pipeline be connected to LNG storage tank with
Between compressor, it being provided with the first Self-driven pressure-adjusting valve, Self-driven pressure-adjusting valve is according to the gas-phase space at LNG storage tank top
Pressure change can automatically open up and close；Second medium pipeline is connected between compressor and heat exchanger tube；3rd medium pipeline connects
Between bottom heat exchanger tube and LNG storage tank.Control system changes control according to the BOG gas-phase space pressure at LNG storage tank top
Compressor start processed or stopping.This retracting device is in running, and BOG is cooling liquid in heat exchanger tube, at cold and hot inversion of phases
During, the tube side of device can occur vibration to produce noise, and affects device lifetime.
The most domestic LNG main users is city bus, long-distance passenger transportation vehicle, has the long haul car of route
And the haulage vehicle in coalfield, mine, for the use demand of above vehicle, some LNG station needs to build highway or coal in
The remote districts such as field, mine, it is relatively difficult that district of standing connects electricity, limits the construction of gas station.
Authorization Notice No. is that the patent documentation of CN 203131417 U discloses a kind of skid-mounted type confession with BOG recovery function
Electricity LNG gas station, adds including LNG low-temperature storage tank, LNG immersed pump, LNG filling machine, EAG gasifier, BOG
Hot device, BOG heating stable-pressure device, natural gas power unit and automatic control system, can return the BOG that low-temperature storage tank produces
Receipts are used for generating electricity, then provide electric energy and heat supply by the electric energy sent for this gas station and other electricity consumption facilities, it is achieved more than BOG
Gas recycles, and reaches the purpose of energy-saving and environmental protection.
Utility model content
This utility model provides a kind of self contained LNG station, is reclaimed by BOG and generates electricity, supplies the confession of whole gas station
Electricity.
A kind of self contained LNG station, including in LNG storage tank, gas electricity generator and the described station powered by gas electricity generator
Current consuming apparatus, is additionally provided with BOG and retracting device is lost, and described BOG loss retracting device includes compressor, heat exchanger, LNG
Recycling can and LNG gasification vacuum tank, described LNG storage tank connects the gas access of compressor by BOG delivery pipe, described
Heat exchanger is two heat exchangers of shell-and-tube, wherein:
The tube-side inlet of First Heat Exchanger meets the gas outlet of compressor, and the tube side outlet of First Heat Exchanger connects the shell of the second heat exchanger
Journey entrance, the shell-side outlet of the second heat exchanger connects LNG recycling can；
The tube-side inlet of the second heat exchanger connects liquid nitrogen source, and the tube side outlet of the second heat exchanger connects the shell side inlet of First Heat Exchanger, the
The shell-side outlet of one heat exchanger is nitrogen discharge mouth；
The liquid-phase outlet of LNG recycling can connects LNG gasification vacuum tank, and the gaseous phase outlet of LNG gasification vacuum tank connects gas electricity generator
Fuel gas pipeline.
Gas after compression is entered the shell side of the second heat exchanger by this utility model through the tube side of First Heat Exchanger, with the second heat exchanger
Liquid nitrogen in tube side carries out heat exchange, and BOG temperature reduces and forms LNG, in shell-side outlet enters LNG recycling can；Simultaneously
Absorbing the liquid nitrogen of heat then to gasify and enter the shell side of First Heat Exchanger for nitrogen, nitrogen now still has lower temperature, with the
The BOG of the compression in one heat exchanger tube pass carries out heat exchange, to BOG pre-cooling, plays the effect of voltage stabilizing.
Make inside heat exchanger from the distribution of the liquid nitrogen of the second heat exchanger tube pass entrance gas phase nitrogen to First Heat Exchanger shell-side outlet
Temperature from bottom to up presents the trend being gradually increasing so that the BOG of heat exchange the most gradually lowers the temperature therewith, and liquefaction is extremely
LNG.Gas at normal temperature after avoiding because of compression and ultra-low temperature liquid nitrogen direct heat exchange cause the vibration of heat exchanger tube.
The natural gas supply gas electricity generator that LNG in LNG recycling can obtains after gasification voltage stabilizing generates electricity, and electromotor leads to
Crossing power transmission cable is the power electricity consuming apparatus in standing.
As preferably, between described LNG storage tank and LNG gasification vacuum tank, it is provided with emergent LNG supply pipe.When LNG reclaims
In the inadequate supply station of LNG in tank during electricity consumption of equipment demand, emergent LNG supply pipe can be opened, provide natural gas for electromotor.
As preferably, the bottom in described LNG gasification vacuum tank is provided with the heat exchange coil for the LNG that gasifies.By heat exchange dish
The heating of pipe, LNG gasification supply generator.
As preferably, said two heat exchanger is integrated pot type structure, and the shell side of two heat exchangers is by the dividing plate in tank
Mutually isolated.Integration pot type apparatus structure is simple, it is not necessary to unnecessary pipeline is attached, and saving takes up room.
As preferably, the tube side of two heat exchangers is spiral coil structure.Spiral coil structure adds between tube side and shell side
Contact area, effectively utilizes the low temperature of liquid nitrogen to carry out heat exchange
As preferably, described First Heat Exchanger is positioned at the surface of the second heat exchanger.Nitrogen after gasification is direct without driving equipment
Enter the shell side of First Heat Exchanger above.
As preferably, the top of described LNG recycling can and the top of LNG gasification vacuum tank are equipped with quadratic B OG delivery pipe,
Each quadratic B OG delivery pipe is communicated to the gas access of compressor.The BOG of LNG recycling can generation and LNG gasification voltage stabilizing
The most unnecessary gas enters compressor and liquefies.
It is equipped with check (non-return) valve in view of on the safety of LNG station, described BOG delivery pipe and each quadratic B OG delivery pipe.
Compared with prior art, the beneficial effect that this utility model possesses:
(1) heat exchanger of the present utility model is two heat exchangers of shell-and-tube, after utilizing the nitrogen of gasification to compression in First Heat Exchanger
Gas carry out pre-cooling, play the effect of manostat, make the liquefaction of BOG carry out under conditions of a relative mitigation, extend
The service life of equipment；
(2) BOG is reclaimed by this utility model, and the LNG obtained is for the generating supply of interior current consuming apparatus of standing, it is achieved more than BOG
Gas recycles, and reaches the purpose of energy-saving and environmental protection.
Accompanying drawing explanation
Fig. 1 is the structural representation of the self contained LNG station of this utility model.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but following embodiment is the most of the present utility model
Preferred embodiment, and not all.Based on the embodiment in embodiment, those skilled in the art are not making creative work
On the premise of obtained other embodiments, broadly fall into protection domain of the present utility model.
As it is shown in figure 1, the LNG station that this utility model is self contained, retracting device, combustion are lost including LNG storage tank 1, BOG
Current consuming apparatus 16 in gas electromotor 15 and the station that powered by gas electricity generator.
BOG loss retracting device includes compressor 3, heat exchanger 4, LNG recycling can 5 and LNG gasification vacuum tank 17.
LNG storage tank 1 connects the gas access of compressor 3 by BOG delivery pipe 2, BOG delivery pipe 2 is provided with first only
Inverse valve 6.
Heat exchanger 4 is two heat exchangers of shell-and-tube, and point First Heat Exchanger 41 and the second heat exchanger 42, the two heat exchanger is
Integrated pot type structure, First Heat Exchanger 41 is positioned at the surface of the second heat exchanger 42.The shell side of two heat exchangers passes through
Dividing plate 43 in tank is mutually isolated.The tube side of two heat exchangers is spiral coil structure.
The gas outlet of compressor 3 connects the tube-side inlet of First Heat Exchanger 41, between pipeline on the first ball valve 7 is installed.
The tube side outlet of First Heat Exchanger 41 connects the shell side inlet of the second heat exchanger, and the shell-side outlet of the second heat exchanger connects LNG recycling can
5, between pipeline on the second check (non-return) valve 8 is installed.
The tube-side inlet of the second heat exchanger 42 connects liquid nitrogen storage tank 9, between pipeline on flow control valve 10 is installed.Second heat exchange
The tube side outlet of device connects the shell side inlet of First Heat Exchanger, and the top of First Heat Exchanger is provided with shell-side outlet, for nitrogen discharge mouth 11.
The top of LNG recycling can 5 is provided with quadratic B OG delivery pipe 12, is communicated to the gas access of compressor 3, quadratic B OG
3rd check (non-return) valve 13 is installed on delivery pipe 12.
The liquid-phase outlet of LNG recycling can 5 connects LNG gasification vacuum tank 17, between pipeline on the second ball valve 18 is installed.LNG
Bottom in gasification vacuum tank 17 is provided with the heat exchange coil 19 for the LNG that gasifies.The gaseous phase outlet of LNG gasification vacuum tank 17
Connect the fuel gas pipeline of gas electricity generator 15.
It is provided with emergent LNG supply pipe 20 between LNG storage tank 1 and LNG gasification vacuum tank 17, it is provided with the 3rd ball valve
21。
The top of LNG gasification vacuum tank 17 is provided with quadratic B OG delivery pipe 22, is communicated to the gas access of compressor 3, its
4th check (non-return) valve 23 is installed on pipeline.
The running of the LNG station that this utility model is self contained is:
When BOG pressure in LNG storage tank 1 reaches a certain setting value, BOG exports in LNG storage tank 1, enters compression
Machine 3, the BOG of output squeezing enters the tube side of First Heat Exchanger 41.
Liquid nitrogen enters the tube side of the second heat exchanger from liquid nitrogen storage tank, and its gasifying section enters the shell of First Heat Exchanger by tube side outlet
BOG in journey, with First Heat Exchanger 41 tube side carries out heat exchange, and to BOG pre-cooling, last gas phase nitrogen is from nitrogen discharge
Discharge at mouth 11.The BOG of pre-cooling enters the shell side of the second heat exchanger, and with the liquid nitrogen heat exchange in tube side, cooling forms LNG.
Make inside heat exchanger from the distribution of the liquid nitrogen of the second heat exchanger tube pass entrance gas phase nitrogen to First Heat Exchanger shell-side outlet
Temperature from bottom to up presents the trend being gradually increasing so that the BOG of heat exchange the most gradually lowers the temperature therewith, and liquefaction is extremely
LNG.Air inflow and liquid nitrogen input can be controlled by regulating the first ball valve 7 and flow control valve 10, regulate exchange rate.
When need to generate electricity, opening the second ball valve 18, the LNG in LNG recycling can 5 obtains after the gasification voltage stabilizing of gasification vacuum tank 17
Generating electricity to natural gas supply gas electricity generator 15, electromotor is that the current consuming apparatus 16 in station is powered by power transmission cable.Gas
It is re-liquefied that natural gas unnecessary after change imports compressor 3 by quadratic B OG delivery pipe 22.
When the LNG in LNG recycling can 5 is not enough to supply generator generating, opens the 3rd ball valve 21, open emergent LNG
Supply pipe 20, exports LNG from LNG storage tank and is used for generating electricity.
When the BOG in LNG recycling can reaches a certain setting value, and BOG imports the gas access of compressor 3 and liquefies.
Claims (8)
1. a self contained LNG station, including LNG storage tank, gas electricity generator and the described station powered by gas electricity generator
Interior current consuming apparatus, it is characterised in that be additionally provided with BOG be lost retracting device, described BOG loss retracting device include compressor,
Heat exchanger, LNG recycling can and LNG gasification vacuum tank, described LNG storage tank connects the gas of compressor by BOG delivery pipe
Body entrance, described heat exchanger is two heat exchangers of shell-and-tube, wherein:
The tube-side inlet of First Heat Exchanger meets the gas outlet of compressor, and the tube side outlet of First Heat Exchanger connects the shell of the second heat exchanger
Journey entrance, the shell-side outlet of the second heat exchanger connects LNG recycling can；
The tube-side inlet of the second heat exchanger connects liquid nitrogen source, and the tube side outlet of the second heat exchanger connects the shell side inlet of First Heat Exchanger, the
The shell-side outlet of one heat exchanger is nitrogen discharge mouth；
The liquid-phase outlet of LNG recycling can connects LNG gasification vacuum tank, and the gaseous phase outlet of LNG gasification vacuum tank connects gas electricity generator
Fuel gas pipeline.
The most self contained LNG station, it is characterised in that described LNG storage tank is steady with LNG gasification
It is provided with emergent LNG supply pipe between pressure tank.
The most self contained LNG station, it is characterised in that the bottom in described LNG gasification vacuum tank
It is provided with the heat exchange coil for the LNG that gasifies.
The most self contained LNG station, it is characterised in that said two heat exchanger is integrated
Pot type structure, the shell side of two heat exchangers is mutually isolated by the dividing plate in tank.
The most self contained LNG station, it is characterised in that the tube side of two heat exchangers is spiral coil
Structure.
The most self contained LNG station, it is characterised in that described First Heat Exchanger is positioned at secondary heat exchange
The surface of device.
The most self contained LNG station, it is characterised in that the top of described LNG recycling can and
The top of LNG gasification vacuum tank is equipped with quadratic B OG delivery pipe, and the gas that each quadratic B OG delivery pipe is communicated to compressor enters
Mouthful.
The most self contained LNG station, it is characterised in that described BOG delivery pipe and each secondary
It is equipped with check (non-return) valve on BOG delivery pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620485329.6U CN205618973U (en) | 2016-05-20 | 2016-05-20 | LNG station of self -supporting formula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620485329.6U CN205618973U (en) | 2016-05-20 | 2016-05-20 | LNG station of self -supporting formula |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205618973U true CN205618973U (en) | 2016-10-05 |
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ID=57024602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620485329.6U Expired - Fee Related CN205618973U (en) | 2016-05-20 | 2016-05-20 | LNG station of self -supporting formula |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205618973U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023748A (en) * | 2017-05-26 | 2017-08-08 | 江南造船(集团)有限责任公司 | Non- LNG precoolings ship combustion gas charging method first |
| CN108518581A (en) * | 2018-06-06 | 2018-09-11 | 张家港艾普能源装备有限公司 | LNG storage tank BOG recovery systems |
| CN110159920A (en) * | 2019-06-14 | 2019-08-23 | 青岛双瑞海洋环境工程股份有限公司 | LNG air supply system peculiar to vessel |
| CN110966517A (en) * | 2019-11-27 | 2020-04-07 | 天津绿州能源装备有限公司 | BOG (boil off gas) recovery system for liquefied natural gas storage tank |
-
2016
- 2016-05-20 CN CN201620485329.6U patent/CN205618973U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023748A (en) * | 2017-05-26 | 2017-08-08 | 江南造船(集团)有限责任公司 | Non- LNG precoolings ship combustion gas charging method first |
| CN108518581A (en) * | 2018-06-06 | 2018-09-11 | 张家港艾普能源装备有限公司 | LNG storage tank BOG recovery systems |
| CN110159920A (en) * | 2019-06-14 | 2019-08-23 | 青岛双瑞海洋环境工程股份有限公司 | LNG air supply system peculiar to vessel |
| CN110966517A (en) * | 2019-11-27 | 2020-04-07 | 天津绿州能源装备有限公司 | BOG (boil off gas) recovery system for liquefied natural gas storage tank |
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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: 20161005 Termination date: 20180520 |