CN204284920U - A kind of liquefied natural gas aerating machine with low temperature compression device - Google Patents
A kind of liquefied natural gas aerating machine with low temperature compression device Download PDFInfo
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- CN204284920U CN204284920U CN201420761965.8U CN201420761965U CN204284920U CN 204284920 U CN204284920 U CN 204284920U CN 201420761965 U CN201420761965 U CN 201420761965U CN 204284920 U CN204284920 U CN 204284920U
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Abstract
The utility model relates to a kind of liquefied natural gas aerating machine with low temperature compression device, adds in liquefied natural gas bottle by the LNG Liquefied natural gas in liquefied natural gas (LNG) tank, and described device comprises two-way low temperature compression device, flowmeter, control valve; Fueling process comprises precooling, aerating, return-air process; Utilize the BOG in compressor extraction liquefied natural gas bottle, under the effect of pressure difference, the liquefied natural gas liquid in storage tank flows in liquefied natural gas bottle, and after completing liquefied natural gas liquid filling, then the BOG extracted in storage tank adds in gas cylinder; The beneficial effects of the utility model are: do not re-use LNG pump and heavy pump pond, LNG Liquefied natural gas in storage tank is after metering directly to liquefied natural gas bottle aerating, connect liquefied natural gas (LNG) tank namely can work alone, have that structure is simple, cost is low, low in energy consumption, install, the advantage such as simple to operate, zero-emission; Improve operating security and metering accuracy.
Description
Technical field
The utility model belongs to gas filling of liquefied natural gas field, particularly relates to a kind of liquefied natural gas aerating machine with low temperature compression device.
Background technique
Current domestic liquefied natural gas aerating machine is all a measuring apparatus, and it can not work alone, and needs external cryopump from liquefied natural gas (LNG) tank, pump LNG Liquefied natural gas (LNG), then by the measuring apparatus of liquefied natural gas aerating machine to refueling.Use in this aerating flow process pump to LNG Liquefied natural gas supercharging, metering after to refueling, pump operationally generates heat, heat enters in LNG and adds LNG Liquefied natural gas volatilization gas (BOG) amount, use vacuum pump pond in order to cold insulation needs again to carry out thermal insulation to pump simultaneously, vacuum pump pond needs again supporting safety installations, therefore there is system complex, cost is high, BOG production is large, loss is high defect.Because pump can only pressurized liquid, therefore also can only to annotate in automobile LNG liquid, BOG in storage tank cannot be annotated, therefore current liquefied natural gas filling station ubiquity arranges the phenomenon of rock gas outward, pollutes environment, adds unsafe factor, adds loss; Simultaneously because vacuum pump pond volume is comparatively large, be difficult to as oilling machine, pump is arranged in filling machine.In addition in order to improve metering accuracy, need LNG flexible pipe precooling (filling cryogenic liquide) before aerating, therefore bad operation and have certain danger when the rifle after precooling is connected with automobile with flexible pipe, there is flexible pipe hardening, the phenomenon of the water freezing in the easy condensation air of low temperature rifle, and cause poorly sealed.
Summary of the invention
The purpose of this utility model is that proposition is a kind of with the liquefied natural gas aerating machine of low temperature compression device and the technological scheme of aerating method, by the LNG in liquefied natural gas (LNG) tank after metering directly to liquefied natural gas bottle aerating, the BOG extracted in storage tank adds in gas cylinder simultaneously, improves operating security and metering accuracy.
To achieve these goals, the technical solution of the utility model is: a kind of liquefied natural gas aerating machine with low temperature compression device, LNG Liquefied natural gas in liquefied natural gas (LNG) tank is added in liquefied natural gas bottle, comprises two-way low temperature compression device, flowmeter; Described liquefied natural gas aerating machine is provided with the liquid phase interface be connected with the liquid outlet of liquefied natural gas (LNG) tank, the gas phase interface be connected with the gas phase mouth of liquefied natural gas (LNG) tank, the return-air rifle interface be connected with return-air rifle, the liquid feeding rifle interface that is connected with liquid feeding rifle;
Described two-way low temperature compression device is provided with two interfaces: A interface, B interface, and two-way low temperature compression device makes BOG flow into through pressurizeing from B interface output or making BOG export from A interface through pressurization from B interface inflow from A interface;
Described flowmeter comprises gas source and flow amount meter, return-air flowmeter, and described return-air flowmeter is the type double flow meter being provided with gas cylinder connecting end and low temperature compression connecting end;
Described source of the gas liquid phase interface connects the entrance of described gas source and flow amount meter by pipeline, the outlet of gas source and flow amount meter connects described liquid feeding rifle interface by being provided with a pipeline adding hydraulic control valve, and the outlet of gas source and flow amount meter also connects the A interface of described two-way low temperature compression device by the pipeline being provided with a pre-subcooling control valve;
Liquid feeding rifle interface also connects the gas cylinder connecting end of described return-air flowmeter by pipeline, the pipeline of described connection liquid feeding rifle interface and return-air flowmeter is provided with return-air control valve;
Described return-air rifle interface also connects the gas cylinder connecting end of return-air flowmeter by pipeline, the pipeline of described connection return-air rifle interface and return-air flowmeter is provided with and makes medium flow to the safety check of return-air flowmeter from return-air rifle interface;
The low temperature compression connecting end of described return-air flowmeter also connects the A interface of two-way low temperature compression device by pipeline;
The B interface of described two-way low temperature compression device connects described gas phase interface by pipeline;
Further, described two-way low temperature compression device comprises compressor, cold exchanger, selector valve; Described cold exchanger is provided with C interface, D interface, E interface, F interface, the one cold exchange media in road flows through cold exchanger by described C interface and D interface, the cold exchange media in another road flows through cold exchanger by described E interface and F interface, the C interface of described cold exchanger connects the A interface of described two-way low temperature compression device, and the E interface of described cold exchanger connects the B interface of described two-way low temperature compression device; Described selector valve comprises forward interface, contradirectional interface, compression input interface, compression output interface,
D interface and the F interface of described cold exchanger are connected forward interface and the contradirectional interface of described selector valve respectively; The compression input interface of described selector valve connects the inlet opening of described compressor, and the compression output interface of selector valve connects the delivery outlet of compressor.
Further, cold exchanger is the one of tube type cold exchanger or shell of pipe type cold exchanger or board-like cold exchanger or plate and fin type cold exchanger.
Further, the cold exchanger that combined by tube type cold exchanger or shell of pipe type cold exchanger or board-like cold exchanger or plate and fin type cold exchanger of described cold exchanger.
Further, described selector valve is two position four-way valves, and a valve position of selector valve makes that the forward interface of selector valve is communicated with compression input interface, contradirectional interface is communicated with compression output interface; Another valve position of selector valve makes that the forward interface of selector valve is communicated with compression output interface, contradirectional interface is communicated with compression input interface.
Further, described selector valve is combined by two three-way valve to form, and an interface of first three-way valve connects the D interface connection of cold exchanger, and two other interface of first three-way valve connects inlet opening and the delivery outlet of compressor respectively; An interface of second three-way valve connects the F interface connection of cold exchanger, and two other interface of second three-way valve also connects inlet opening and the delivery outlet of compressor respectively.
Further, described gas source and flow amount meter and return-air flowmeter are the flowmeters can measuring the flow of LNG Liquefied natural gas, density and temperature.
The beneficial effects of the utility model are: utilize the BOG in compressor extraction liquefied natural gas bottle, make the pressure in gas cylinder lower than the pressure of gas station liquefied natural gas (LNG) tank, under the effect of pressure difference, the liquefied natural gas liquid in storage tank flows in liquefied natural gas bottle; The BOG extracted out is transported in the liquefied natural gas (LNG) tank of gas station and temporarily deposits, and after completing liquefied natural gas liquid filling, then the BOG extracted in storage tank adds in gas cylinder; Do not re-use LNG pump and heavy pump pond, LNG Liquefied natural gas in storage tank is after metering directly to liquefied natural gas bottle aerating, connect liquefied natural gas (LNG) tank namely can work alone, have that structure is simple, cost is low, low in energy consumption, install, the advantage such as simple to operate, zero-emission; Improve operating security and metering accuracy.
Below in conjunction with drawings and Examples, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is the utility model structure principle chart, and wherein two-way low temperature compression device adopts tube type cold exchanger and four-way change-over valve;
Fig. 2 is the structure principle chart that the utility model adopts the two-way low temperature compression device of shell of pipe type cold exchanger;
Fig. 3 is the structure principle chart that the utility model adopts the two-way low temperature compression device of board-like cold exchanger;
Fig. 4 is the structure principle chart that the utility model adopts the two-way low temperature compression device of plate and fin type cold exchanger;
Fig. 5 is the structure principle chart that the utility model adopts the two-way low temperature compression device of the cold exchanger of tubular type and board-like combination;
Fig. 6 is that the utility model adopts two three-way valve to form the structure principle chart of the two-way low temperature compression device of selector valve;
Fig. 7 is the schematic diagram of the utility model precooling operation;
Fig. 8 is the schematic diagram of the utility model aerating operation;
Fig. 9 is the schematic diagram of the utility model return-air operation.
Embodiment
Embodiment one:
As Fig. 1, a kind of liquefied natural gas aerating machine with low temperature compression device, adds in liquefied natural gas bottle by the LNG Liquefied natural gas in liquefied natural gas (LNG) tank, comprises two-way low temperature compression device 10, flowmeter; Described liquefied natural gas aerating machine is provided with the source of the gas liquid phase interface 21 be connected with the liquid outlet of liquefied natural gas (LNG) tank, the gas phase interface 22 be connected with the gas phase mouth of liquefied natural gas (LNG) tank, the return-air rifle interface 23 be connected with return-air rifle, the liquid feeding rifle interface 24 that is connected with liquid feeding rifle;
Described two-way low temperature compression device is provided with two interfaces: A interface (number in the figure A), B interface (number in the figure B), and two-way low temperature compression device makes LNG Liquefied natural gas flow into through pressurizeing from B interface output or making LNG Liquefied natural gas flow into the device exported from A interface through pressurization from B interface from A interface;
Described flowmeter comprises gas source and flow amount meter 31, return-air flowmeter 32, and described return-air flowmeter is the type double flow meter being provided with gas cylinder connecting end 32a and low temperature compression connecting end 32b;
Described source of the gas liquid phase interface connects the entrance of described gas source and flow amount meter by pipeline, the outlet of gas source and flow amount meter connects described liquid feeding rifle interface by being provided with a pipeline adding hydraulic control valve 41, and the outlet of gas source and flow amount meter also connects the A interface of described two-way low temperature compression device by the pipeline being provided with a pre-subcooling control valve 42;
Liquid feeding rifle interface also connects the gas cylinder connecting end of described return-air flowmeter by pipeline, the pipeline of described connection liquid feeding rifle interface and return-air flowmeter is provided with return-air control valve 43;
Described return-air rifle interface also connects the gas cylinder connecting end of return-air flowmeter by pipeline, the pipeline of described connection return-air rifle interface and return-air flowmeter is provided with and makes medium flow to the safety check 52 of return-air flowmeter from return-air rifle interface;
The low temperature compression connecting end of described return-air flowmeter also connects the A interface of two-way low temperature compression device by pipeline;
The B interface of described two-way low temperature compression device connects described gas phase interface by pipeline;
Described two-way low temperature compression device comprises cold exchanger 11, selector valve 12, compressor 13; Described cold exchanger is provided with C interface (being labeled as C in figure), D interface (being labeled as D in figure), E interface (being labeled as E in figure), F interface (being labeled as F in figure), the one cold exchange media in road flows through cold exchanger by described C interface and D interface, the cold exchange media in another road flows through cold exchanger by described E interface and F interface, the C interface of described cold exchanger connects the A interface of described two-way low temperature compression device, and the E interface of described cold exchanger connects the B interface of described two-way low temperature compression device; Described selector valve comprises forward interface (being labeled as in figure+), contradirectional interface (being labeled as in figure-), compression input interface (being labeled as I in figure), compression output interface (being labeled as U in figure).
D interface and the F interface of described cold exchanger are connected forward interface and the contradirectional interface of described selector valve respectively; The compression input interface of described selector valve connects the inlet opening of described compressor, and the compression output interface of selector valve connects the delivery outlet of compressor.
Described cold exchanger is the heat exchanger for cold energy displacement, and in the present embodiment, cold exchanger is a tubular heat exchanger, referred to here as tube type cold exchanger; Selector valve is two position four-way valves, and a valve position of selector valve makes that the forward interface of selector valve is communicated with compression input interface, contradirectional interface is communicated with compression output interface; Another valve position of selector valve makes that the forward interface of selector valve is communicated with compression output interface, contradirectional interface is communicated with compression input interface.
Described gas source and flow amount meter and return-air flowmeter are the flowmeters can measuring the flow of LNG Liquefied natural gas, density and temperature.
The pipeline connecting gas phase interface is provided with safety valve 61, the pipeline connecting pre-subcooling control valve and two-way low temperature compression device A interface is provided with safety valve 62, the pipeline connecting liquid feeding rifle interface is provided with safety valve 63.
Embodiment two:
The present embodiment is the replaceable structure of one of two-way low temperature compression device in embodiment one.
As Fig. 2, in described two-way low temperature compression device, described cold exchanger is a shell of pipe type cold exchanger 11a.Described cold exchanger is the heat exchanger for cold energy displacement, and in the present embodiment, cold exchanger is a shell-and-tube exchanger, referred to here as shell of pipe type cold exchanger.
Embodiment three:
The present embodiment is the replaceable structure of one of two-way low temperature compression device in embodiment one.
As Fig. 3, in described two-way low temperature compression device, described cold exchanger is a platen type cold exchanger 11b.Described cold exchanger is the heat exchanger for cold energy displacement, and in the present embodiment, cold exchanger is a platen type heat exchanger, referred to here as board-like cold exchanger.
Embodiment four:
The present embodiment is the replaceable structure of one of two-way low temperature compression device in embodiment one.
As Fig. 4, in described two-way low temperature compression device, described cold exchanger is a plate and fin type cold exchanger 11c.Described cold exchanger is the heat exchanger for cold energy displacement, and in the present embodiment, cold exchanger is a plate fin type heat exchanger, referred to here as plate and fin type cold exchanger.
Embodiment five:
The present embodiment is the replaceable structure of one of two-way low temperature compression device in embodiment one.
In described two-way low temperature compression device, the cold exchanger that described cold exchanger is combined by tube type cold exchanger or shell of pipe type cold exchanger or board-like cold exchanger or plate and fin type cold exchanger.
As Fig. 5, in this enforcement, the cold exchanger that cold exchanger is combined by a tube type cold exchanger 11d and a platen type cold exchanger 11b.Described cold exchanger is the heat exchanger for cold energy displacement, in the present embodiment, and the cold exchanger that cold exchanger is combined by a tubular heat exchanger 11d and a platen type heat exchanger 11b.
Embodiment six:
The present embodiment is the replaceable structure of one of two-way low temperature compression device in embodiment one.
As Fig. 6, in described two-way low temperature compression device, described selector valve is combined by two three-way valve to form, and an interface of first three-way valve 12a connects the D interface connection of cold exchanger, and two other interface of first three-way valve connects inlet opening and the delivery outlet of compressor respectively; An interface of second three-way valve 12b connects the F interface connection of cold exchanger, and two other interface of second three-way valve also connects inlet opening and the delivery outlet of compressor respectively.
Embodiment seven:
As Fig. 7, a kind of LNG Liquefied natural gas adding method, in liquefied natural gas filling station, adopts a kind of liquefied natural gas aerating machine with low temperature compression device described in embodiment one, the LNG Liquefied natural gas in liquefied natural gas (LNG) tank is added in liquefied natural gas bottle.In liquefied natural gas (LNG) tank and liquefied natural gas bottle, store LNG Liquefied natural gas and BOG, described BOG is LNG Liquefied natural gas volatilization gas simultaneously.
As described in embodiment one, described filling machine comprises two-way low temperature compression device 10, flowmeter; Described liquefied natural gas aerating machine is provided with the source of the gas liquid phase interface 21 be connected with the liquid outlet of liquefied natural gas (LNG) tank, the gas phase interface 22 be connected with the gas phase mouth of liquefied natural gas (LNG) tank, the return-air rifle interface 23 be connected with return-air rifle, the liquid feeding rifle interface 24 that is connected with liquid feeding rifle;
Described two-way low temperature compression device is provided with two interfaces: A interface (number in the figure A), B interface (number in the figure B), and two-way low temperature compression device makes LNG Liquefied natural gas flow into through pressurizeing from B interface output or making LNG Liquefied natural gas flow into the device exported from A interface through pressurization from B interface from A interface; The step of described method comprises:
A. make liquid feeding rifle connect the liquid feeding rifle interface 24 of described liquefied natural gas aerating machine and the filling opening of liquefied natural gas bottle, make return-air rifle connect return-air rifle interface 23 interface of described liquefied natural gas aerating machine and the gas returning port of liquefied natural gas bottle;
B. the measured value of return-air flowmeter is recorded.Start described two-way low temperature compression device, comprising: start compressor 13; The valve position of selector valve 12 is set to: make the forward interface (+) of selector valve with compression input interface (I) is communicated with, contradirectional interface (-) with compress output interface (U) be communicated with; Two-way low temperature compression device makes LNG Liquefied natural gas flow into from A interface, exports from B interface through pressurization;
C. close and add hydraulic control valve 41, closedown return-air control valve 43, open pre-subcooling control valve 42, the LNG Liquefied natural gas in liquefied natural gas (LNG) tank flows into natural gas aerating machine from described source of the gas liquid phase interface, is entered two-way low temperature compression device through described gas source and flow amount meter, exported through pressurization, is back to liquefied natural gas (LNG) tank by the described gas phase interface of natural gas aerating machine from B interface by A interface; BOG in liquefied natural gas bottle flows into natural gas aerating machine from return-air rifle interface, flow through the pipeline connecting return-air rifle interface and return-air flowmeter safety check, return-air flowmeter, to be entered two-way low temperature compression device by A interface, export from B interface through pressurization, flowed into liquefied natural gas (LNG) tank by the described gas phase interface of natural gas aerating machine.
The operation of this step is the precooling realizing liquefied natural gas aerating machine; The parameters such as return-air flowmeter moment detected temperatures, density, judge whether precooling reaches setting requirement, thus enter aerated form.Meanwhile, in precooling process, the BOG cooled via return air rifle in liquefied natural gas bottle, two-way low temperature compression device are transported in LNG storage tank, and the pressure of liquefied natural gas bottle reduces, for next step aerating is ready.
D. as Fig. 8, when the state of the BOG flowing through return-air flowmeter in step c reach setting require time, close pre-subcooling control valve, the measured value of record gas source and flow amount meter.In the present embodiment, the state setting requirement flowing through the BOG of return-air flowmeter is: the density of BOG is greater than 0.2 cubic metre/milligram, the temperature of BOG is lower than-120 DEG C.
E. open and add hydraulic control valve, BOG in liquefied natural gas bottle continues to flow in liquefied natural gas (LNG) tank through gas phase interface under the effect of two-way low temperature compression device, and the LNG Liquefied natural gas in liquefied natural gas (LNG) tank adds in liquefied natural gas bottle through described liquid feeding rifle interface.
F. as Fig. 9, compared with the measured value of steps d gas source and flow amount meter record, when the measured value of gas source and flow amount meter note reach predetermined add tolerance time, close add hydraulic control valve, open return-air control valve, the measured value of record liquid phase stream gauge; The valve position of selector valve is set to: make the forward interface (+) of selector valve with compression output interface (U) is communicated with, contradirectional interface (-) with compress input interface (I) be communicated with; Two-way low temperature compression device makes LNG Liquefied natural gas flow into from B interface, exports from A interface through pressurization; BOG in liquefied natural gas (LNG) tank flows into natural gas aerating machine from gas phase interface, to be entered two-way low temperature compression device by B interface, through pressurization from the pipeline of the output of A interface, cooled via return air flowmeter, the connection liquid feeding rifle interface being provided with safety check and return-air flowmeter, be back to liquefied natural gas bottle by the liquid feeding rifle interface of natural gas aerating machine; This step realizes return-air operation, and in this step, the flow direction flowing through the BOG of return-air flowmeter is contrary with the flow direction of the BOG flowing through return-air flowmeter in step c.
G. when liquefied natural gas bottle pressure reaches the pressure limit of setting, close two-way low temperature compression device, disconnect the connection of the filling opening of liquid feeding rifle and liquefied natural gas bottle, disconnect the connection of the gas returning port of return-air rifle and liquefied natural gas bottle, fueling process terminates; The measured value of record return-air flowmeter, compared with the measured value of the return-air flowmeter recorded with step b, obtain the actual quantity of the BOG being added into liquefied natural gas bottle by return-air flowmeter, the liquid phase flowmeter measurements record step f and the liquid phase flowmeter measurements of steps d record subtract each other, and obtain the actual quantity of the LNG Liquefied natural gas being added into liquefied natural gas bottle by liquid phase stream gauge.In the present embodiment, the pressure limit that described liquefied natural gas bottle is arranged is 0.9MPa ~ 1.0MPa, and liquefied natural gas filling station or liquefied natural gas aerating machine are provided with the manometer of liquefied natural gas bottle.
In return-air process, aerating flexible pipe, air filling gun are purged, therefore before aerating and when aerating completes, LNG liquid is not all had in flexible pipe, not needing to carry out precooling (filling flexible pipe liquid) in order to improve metering accuracy to rifle as other filling machines current, improve operating security and metering accuracy.
The BOG of the LNG gas cylinder on automobile through return-air rifle, flow to filling machine inside, measure through the BOG of return-air flowmeter to backflow of filling machine, then reclaim after cold energy through cold-exchange and enter compressor, after overcompression, after cooling, enter LNG storage tank.The import and export of compressor are connected with one end of two of cold exchanger runners, and the other end of cold exchanger two runner is respectively as the import of LNG Liquefied natural gas or BOG and outlet.
The utility model does not re-use LNG pump and heavy pump pond, and the LNG in storage tank is after metering directly to liquefied natural gas bottle (as the liquefied natural gas bottle be arranged on automobile) aerating.Principle utilizes the BOG on compressor extraction automobile in LNG gas cylinder, make the pressure in gas cylinder lower than the pressure of gas station LNG storage tank, under the effect of pressure difference, LNG liquid in storage tank flows in the LNG gas cylinder on automobile, to complete LNG liquid filling function, first the BOG released is transported in the LNG storage tank of gas station and temporarily deposits.After completing LNG liquid filling, then the BOG extracted in storage tank adds in gas cylinder.
Claims (7)
1. with a liquefied natural gas aerating machine for low temperature compression device, the LNG Liquefied natural gas in liquefied natural gas (LNG) tank is added in liquefied natural gas bottle, comprise two-way low temperature compression device, flowmeter; It is characterized in that, described liquefied natural gas aerating machine is provided with the liquid phase interface be connected with the liquid outlet of liquefied natural gas (LNG) tank, the gas phase interface be connected with the gas phase mouth of liquefied natural gas (LNG) tank, the return-air rifle interface be connected with return-air rifle, the liquid feeding rifle interface that is connected with liquid feeding rifle;
Described two-way low temperature compression device is provided with two interfaces: A interface, B interface, and two-way low temperature compression device makes BOG flow into through pressurizeing from B interface output or making BOG export from A interface through pressurization from B interface inflow from A interface;
Described flowmeter comprises gas source and flow amount meter, return-air flowmeter, and described return-air flowmeter is the type double flow meter being provided with gas cylinder connecting end and low temperature compression connecting end;
Described source of the gas liquid phase interface connects the entrance of described gas source and flow amount meter by pipeline, the outlet of gas source and flow amount meter connects described liquid feeding rifle interface by being provided with a pipeline adding hydraulic control valve, and the outlet of gas source and flow amount meter also connects the A interface of described two-way low temperature compression device by the pipeline being provided with a pre-subcooling control valve;
Liquid feeding rifle interface also connects the gas cylinder connecting end of described return-air flowmeter by pipeline, the pipeline of described connection liquid feeding rifle interface and return-air flowmeter is provided with return-air control valve;
Described return-air rifle interface also connects the gas cylinder connecting end of return-air flowmeter by pipeline, the pipeline of described connection return-air rifle interface and return-air flowmeter is provided with and makes medium flow to the safety check of return-air flowmeter from return-air rifle interface;
The low temperature compression connecting end of described return-air flowmeter also connects the A interface of two-way low temperature compression device by pipeline;
The B interface of described two-way low temperature compression device connects described gas phase interface by pipeline.
2. a kind of liquefied natural gas aerating machine with low temperature compression device according to claim 1, is characterized in that, described two-way low temperature compression device comprises compressor, cold exchanger, selector valve; Described cold exchanger is provided with C interface, D interface, E interface, F interface, the one cold exchange media in road flows through cold exchanger by described C interface and D interface, the cold exchange media in another road flows through cold exchanger by described E interface and F interface, the C interface of described cold exchanger connects the A interface of described two-way low temperature compression device, and the E interface of described cold exchanger connects the B interface of described two-way low temperature compression device; Described selector valve comprises forward interface, contradirectional interface, compression input interface, compression output interface,
D interface and the F interface of described cold exchanger are connected forward interface and the contradirectional interface of described selector valve respectively; The compression input interface of described selector valve connects the inlet opening of described compressor, and the compression output interface of selector valve connects the delivery outlet of compressor.
3. a kind of liquefied natural gas aerating machine with low temperature compression device according to claim 2, is characterized in that, cold exchanger is the one of tube type cold exchanger or shell of pipe type cold exchanger or board-like cold exchanger or plate and fin type cold exchanger.
4. a kind of liquefied natural gas aerating machine with low temperature compression device according to claim 2, it is characterized in that, the cold exchanger that described cold exchanger is combined by tube type cold exchanger or shell of pipe type cold exchanger or board-like cold exchanger or plate and fin type cold exchanger.
5. a kind of liquefied natural gas aerating machine with low temperature compression device according to claim 2, it is characterized in that, described selector valve is two position four-way valves, and a valve position of selector valve makes that the forward interface of selector valve is communicated with compression input interface, contradirectional interface is communicated with compression output interface; Another valve position of selector valve makes that the forward interface of selector valve is communicated with compression output interface, contradirectional interface is communicated with compression input interface.
6. a kind of liquefied natural gas aerating machine with low temperature compression device according to claim 2, it is characterized in that, described selector valve is combined by two three-way valve to form, an interface of first three-way valve connects the D interface connection of cold exchanger, and two other interface of first three-way valve connects inlet opening and the delivery outlet of compressor respectively; An interface of second three-way valve connects the F interface connection of cold exchanger, and two other interface of second three-way valve also connects inlet opening and the delivery outlet of compressor respectively.
7. a kind of liquefied natural gas aerating machine with low temperature compression device according to claim 1, is characterized in that, described gas source and flow amount meter and return-air flowmeter are the flowmeters can measuring the flow of LNG Liquefied natural gas, density and temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420761965.8U CN204284920U (en) | 2014-12-08 | 2014-12-08 | A kind of liquefied natural gas aerating machine with low temperature compression device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420761965.8U CN204284920U (en) | 2014-12-08 | 2014-12-08 | A kind of liquefied natural gas aerating machine with low temperature compression device |
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| CN204284920U true CN204284920U (en) | 2015-04-22 |
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| CN201420761965.8U Withdrawn - After Issue CN204284920U (en) | 2014-12-08 | 2014-12-08 | A kind of liquefied natural gas aerating machine with low temperature compression device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456065A (en) * | 2014-12-08 | 2015-03-25 | 日照海达尔加气设备有限公司 | Liquefied natural gas filling machine with low-temperature compression device and liquefied natural gas filling method |
| CN104948906A (en) * | 2015-06-23 | 2015-09-30 | 大丰市大昌燃气设备有限公司 | CNG dispenser and operation method thereof |
| CN105889751A (en) * | 2016-04-11 | 2016-08-24 | 上海新奥新能源技术有限公司 | LNG filling system, BOG processing system and mobile LNG filling ship |
-
2014
- 2014-12-08 CN CN201420761965.8U patent/CN204284920U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456065A (en) * | 2014-12-08 | 2015-03-25 | 日照海达尔加气设备有限公司 | Liquefied natural gas filling machine with low-temperature compression device and liquefied natural gas filling method |
| CN104456065B (en) * | 2014-12-08 | 2016-04-27 | 日照海达尔加气设备有限公司 | A kind of liquefied natural gas aerating machine with low temperature compression device and aerating method |
| CN104948906A (en) * | 2015-06-23 | 2015-09-30 | 大丰市大昌燃气设备有限公司 | CNG dispenser and operation method thereof |
| CN105889751A (en) * | 2016-04-11 | 2016-08-24 | 上海新奥新能源技术有限公司 | LNG filling system, BOG processing system and mobile LNG filling ship |
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