CN102635783B - Safe energy-saving LNG (Liquefied Natural Gas) skid-mounted filling station - Google Patents
Safe energy-saving LNG (Liquefied Natural Gas) skid-mounted filling station Download PDFInfo
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- CN102635783B CN102635783B CN201210104497.2A CN201210104497A CN102635783B CN 102635783 B CN102635783 B CN 102635783B CN 201210104497 A CN201210104497 A CN 201210104497A CN 102635783 B CN102635783 B CN 102635783B
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Abstract
The invention discloses a safe energy-saving LNG (Liquefied Natural Gas) skid-mounted filling station, which comprises an LNG technical pry, an LNG tank car and an LNG storage tank, wherein the LNG technical pry comprises an LNG low-temperature immersed pump and an LNG filling machine; a liquid outlet of the LNG tank car is connected with the LNG low-temperature immersed pump via a pipeline and a valve; a liquid outlet of the LNG low-temperature immersed pump is connected with the LNG storage tank and the LNG filling machine via a pipeline and a valve; meanwhile, a liquid outlet of the LNG storage tank is connected back to the low-temperature immersed pump via a pipeline and a valve; and a liquid outlet of the LNG filling machine is connected back to the LNG storage tank via a pipeline and a valve. The safe energy-saving LNG skid-mounted filling station has the advantages of reasonable and simple design, advanced control, low energy consumption and high safety. Meanwhile, the defect that the LNG tank car is metered by a platform scale after being unloaded can be avoided, and the unloading metering accuracy is improved.
Description
Technical field
The present invention relates to a kind of LNG filling station, particularly relate to a kind of LNG skid filling station.
Background technique
LNG gas station is the basic premise that ensures the normal operation of LNG automobile, particularly for single fuel LNG automobile, more needs the gas station of supporting synchronized development.For accelerating the construction of gas station and the reduction cost of building a station, just wideling popularize both at home and abroad and building Mobile skid-mounted LNG gas station, it is to adopt skid-mounted integrated technology that the storage device of gas station, loading system and control system etc. are all integrated in to the integral device that forms a closed loop control on a skid base.Skid-mounted LNG gas station does not rely on that gas distributing system and source of the gas, little, the integrated degree of floor space are high, advanced technology, safe and reliable, invest little, the cycle of building a station is short, easy to operate and resettlement, maneuverability, the advantage that integrates convenience that skid moves and LNG transport and use, this gas station must not build a station separately simultaneously, can be located in existing gas station or CNG gas station, can form rapidly aerating network with less investment in the short period of time, be particularly suitable for building and promoting in city.
Because skid-mounted LNG gas station has particular/special requirement to safety and energy consumption, therefore how improving Security and reducing energy consumption becomes the technical barrier of development skid-mounted LNG gas station.
Summary of the invention
The object of the present invention is to provide a kind of safer, more energy-conservation LNG skid filling station.
Technological scheme of the present invention is as follows: a kind of safety and energy-saving LNG skid filling station, comprise LNG technique sled, LNG tank car, LNG storage tank, described LNG technique sled comprises LNG low temperature immersed pump, LNG filling device, the liquid outlet of LNG tank car is connected LNG low temperature immersed pump with valve by pipeline, the liquid outlet of LNG low temperature immersed pump is connected LNG storage tank and a LNG filling device with valve by pipeline, on a described LNG filling device, be also parallel with the 2nd LNG filling device, the liquid outlet of LNG storage tank takes back LNG low temperature immersed pump by pipeline and valve simultaneously, and the liquid outlet of two LNG filling devices takes back LNG storage tank by pipeline and valve, on two filling devices, be provided with flowmeter and control system.
In technique scheme, the liquid outlet of LNG tank car is connected LNG low temperature immersed pump with valve by pipeline, if open respective valves, LNG liquid flows into LNG low temperature immersed pump by LNG tank car; The liquid outlet of LNG low temperature immersed pump is connected LNG storage tank and LNG filling device with valve by pipeline, if open respective valves, LNG low temperature immersed pump is transported to LNG storage tank by LNG liquid after to the supercharging of LNG liquid, complete LNG liquid by LNG tank car the process of unloading to LNG storage tank; The liquid outlet of LNG storage tank takes back LNG low temperature immersed pump by pipeline and valve simultaneously, before liquid feeding, LNG liquid is by the LNG storage tank LNG low temperature immersed pump of flowing through, after the supercharging of LNG low temperature immersed pump, flow to LNG filling device, because the liquid outlet of LNG filling device takes back LNG storage tank by pipeline and valve, LNG liquid flows back to LNG storage tank through LNG filling device, form major cycle, complete the precooling to LNG filling device, after precooling fully, automatically get back to holding state; In the time that vehicle is annotated, start the filling button on LNG filling device, LNG liquid by LNG storage tank after LNG low temperature immersed pump, LNG filling device to automobile steel cylinder liquid feeding, after having annotated, get back to holding state.
If switch respective valves in the time unloading, make LNG liquid flow to two LNG filling devices by LNG tank car through LNG low temperature immersed pump, then flow back to LNG storage tank, in the time unloading, can complete the metering of unloading by the flowmeter of two LNG filling devices and control system, the drawback of having avoided LNG tank car to measure by platform scale after unloading, has improved the accuracy of metering.
Further, on the stroke of valve, be embedded with spacing feedback switch.Do not need personnel manually to control in order to reach valve safety, therefore can on the stroke of each valve, embed spacing feedback switch, whether open completely or close for detection of valve, then signal feed back is processed to upper-position unit.
Further, the gas phase mouth of LNG tank car is communicated with the gas phase pipe of LNG storage tank, and the BOG gas while unloading in LNG storage tank is filled with LNG tank car by gas phase pipe.Because the gas phase mouth of LNG tank car and the gas phase pipe of LNG storage tank are communicated with, BOG gas while unloading in LNG storage tank is filled with LNG tank car by gas phase pipe, solve on the one hand the gaseous pressure reduction that LNG tank car causes because liquid reduces, solved on the other hand the gaseous pressure rising that LNG storage tank causes because liquid increases.That is to say, unload in process whole, do not need the pressure release of LNG storage tank, the operation of can directly unloading, greatly reduces the energy waste causing while unloading.
Further again, LNG filling station comprises supercharging vaporizer, and the import of supercharging vaporizer connects respectively the liquid outlet of LNG storage tank and LNG low temperature immersed pump, and the outlet of supercharging vaporizer communicates with the inner chamber gas phase of LNG storage tank by gas phase pipe.First LNG liquid is gasified by the liquid outlet inflow supercharging vaporizer of LNG storage tank, and the gas producing after gasification is back to the gas-phase space of LNG storage tank inner chamber through the gas phase pipe of LNG storage tank, for adjusting LNG storage tank inner chamber gaseous pressure; LNG liquid also can flow into LNG low temperature immersed pump by the liquid outlet of LNG storage tank simultaneously, gasify by flowing into supercharging vaporizer after the supercharging of LNG low temperature immersed pump, the gas producing after gasification is back to LNG storage tank inner chamber through the gas phase pipe of LNG storage tank, adjusts the gaseous pressure of LNG storage tank inner chamber.That is to say, the present invention supports from supercharging pressure regulation and two kinds of modes of immersed pump pressure regulation, break down or in when maintenance, can be that the supercharging of LNG storage tank realizes filled function by supercharging vaporizer at LNG low temperature immersed pump, the normal business of filling station when the equipment that ensured breaks down or overhauls.
In sum, remarkable result of the present invention is: (1) is reasonable in design, simple, controls advanced, safe; (2) drawback of avoiding LNG tank car to measure by platform scale after unloading, has improved the metering accuracy of unloading; (3) unload in process and do not need, to the pressure release of LNG storage tank, to greatly reduce energy consumption; (4) support from supercharging and two kinds of voltage regulating modes of immersed pump, break down or in when maintenance, can be that the supercharging of LNG storage tank realizes filled function by supercharging vaporizer at LNG low temperature immersed pump, improved the reliability of LNG skid filling station.
Brief description of the drawings
Fig. 1 is the principle schematic of LNG skid filling station.
Embodiment
Below in conjunction with concrete drawings and embodiments, the present invention is further illustrated.
Referring to Fig. 1, a kind of safety and energy-saving LNG skid filling station, comprise LNG technique sled, LNG tank car 1, LNG storage tank 2, LNG technique sled comprises LNG low temperature immersed pump 3, LNG filling device, the liquid outlet of LNG tank car 1 is connected LNG low temperature immersed pump 3 with valve by pipeline, the liquid outlet of LNG low temperature immersed pump 3 is connected LNG storage tank 2 and LNG filling device with valve by pipeline, the liquid outlet of LNG storage tank 2 takes back LNG low temperature immersed pump 3 by pipeline and valve simultaneously, and the liquid outlet of LNG filling device takes back LNG storage tank 2 by pipeline and valve.
In the present embodiment, open pneumatic valve VQD101, LNG liquid flows into LNG low temperature immersed pump 3 by LNG tank car 1, open stop valve VJ114 and VQD103, LNG low temperature immersed pump 3 is transported to LNG storage tank 2 by LNG liquid after to the supercharging of LNG liquid, in the time that LNG storage tank 2 liquid reach 80%, sends level alarm, automatically close LNG low temperature immersed pump 3 and pneumatic valve VQD103, complete the process of unloading of LNG liquid by LNG tank car 1 to LNG storage tank 2.If in the time that LNG tank car arrives, in unloading deck connecting hose, open pneumatic valve VQD103, LNG liquid is by the pneumatic valve VQD101 LNG low temperature immersed pump 3 of flowing through, if now close stop valve VJ114, open stop valve VJ109, VJ110, VJ111, VJ112, VJ113, LNG liquid flows to LNG filling device 4a by stop valve VJ111 after 3 superchargings of LNG low temperature immersed pump, flow to LNG filling device 4b by stop valve VJ113, then LNG liquid flows to stop valve VJ109 by stop valve VJ110 and stop valve VJ112 respectively, flow back to LNG storage tank 2 by pneumatic valve VQD103 again, realize the unload function of metering of the flowmeter of LNG liquid by LNG filling device and control system, the drawback of having avoided LNG tank car to measure by platform scale after unloading, improve the accuracy of metering.
Under normal circumstances, close pneumatic valve VQD101, VQD102, VQD103, open pneumatic valve VQD104 and stop valve VJ108, LNG liquid flows to LNG low temperature immersed pump 3 by LNG storage tank 2, LNG low temperature immersed pump 3 is to the supercharging of LNG liquid, then by stop valve VJ111, the VJ113 LNG filling device of flowing through, in the time there is no vehicle filling, LNG liquid is by stop valve VJ110, VJ112 flows back to LNG storage tank, form major cycle, complete the precooling to LNG filling device, after precooling fully, filling device is got back to holding state automatically, in the time that vehicle is annotated, directly start the filling button on LNG filling device, LNG filling device starts automobile steel cylinder liquid feeding, after completing, liquid feeding gets back to holding state.
In the present embodiment, the gas phase mouth of LNG tank car 1 is communicated with the gas phase pipe 10 of LNG storage tank 2, and the BOG gas while unloading in LNG storage tank 2 is filled with LNG tank car 1 by gas phase pipe 10.Because the gas phase mouth of LNG tank car 1 and the gas phase pipe 10 of LNG storage tank 2 are communicated with, BOG gas while unloading in LNG storage tank 2 is filled with LNG tank car 1 by gas phase pipe 10, solve on the one hand the gaseous pressure reduction that LNG tank car 1 causes because liquid reduces, solved on the other hand the gaseous pressure rising that LNG storage tank 2 causes because liquid increases.That is to say, unload in process whole, do not need 2 pressure releases of LNG storage tank, the operation of can directly unloading, has not only improved the efficiency of unloading, and greatly reduces the energy waste causing while unloading.
LNG skid filling station of the present invention also comprises supercharging vaporizer 5, and the import of supercharging vaporizer 5 connects respectively the liquid outlet of LNG storage tank 2 and LNG low temperature immersed pump 3, and the outlet of supercharging vaporizer 5 communicates with the inner chamber gas phase of LNG storage tank 2 by gas phase pipe 10.When LNG storage tank 2 is in negative pressure or when continuously fluid is slower after liquid feeding, can open pneumatic valve VQD102, VQD104, VQD105, LNG liquid relies on potential difference stream to flow into supercharging vaporizer 5, supercharging vaporizer 5 carries out supercharging to LNG storage tank 2 after LNG liquid gasification is heated up, in the time that LNG storage tank inner chamber gaseous pressure is greater than setting value, automatically close pneumatic valve VQD102; LNG liquid also can flow into LNG low temperature immersed pump 3 by VQD104 and stop valve VJ108 simultaneously, LNG low temperature immersed pump 3 flows into supercharging vaporizer 5 by stop valve VJ107 after to the supercharging of LNG liquid, supercharging vaporizer 5 flows back to LNG storage tank 2 inner chambers by pneumatic valve VQD105 after LNG liquid gasification is heated up, and increases LNG storage tank inner chamber gaseous pressure.
That is to say, the present invention supports two kinds of voltage regulating modes, breaks down or in when maintenance, can be directly that the 2 superchargings realizations of LNG storage tank are annotated by supercharging vaporizer 5, the normal business of filling station when the equipment that ensured breaks down or overhauls at LNG low temperature immersed pump 3.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. a safety and energy-saving LNG skid filling station, comprise LNG technique sled, LNG tank car, LNG storage tank, it is characterized in that: described LNG technique sled comprises LNG low temperature immersed pump, LNG filling device, the liquid outlet of LNG tank car is connected LNG low temperature immersed pump with valve by pipeline, the liquid outlet of LNG low temperature immersed pump is connected LNG storage tank and a LNG filling device with valve by pipeline, on a described LNG filling device, be also parallel with the 2nd LNG filling device, the liquid outlet of LNG storage tank takes back LNG low temperature immersed pump by pipeline and valve simultaneously, and the liquid outlet of two LNG filling devices takes back LNG storage tank by pipeline and valve, on two filling devices, be provided with flowmeter and control system, while unloading, switch respective valves, make LNG liquid flow to two LNG filling devices by LNG tank car through LNG low temperature immersed pump, then flow back to LNG storage tank, in the time unloading, can complete the metering of unloading by the flowmeter of two LNG filling devices and control system, the drawback of avoiding LNG tank car to measure by platform scale after unloading.
2. safety and energy-saving LNG skid filling station according to claim 1, is characterized in that: on the stroke of described valve, be embedded with spacing feedback switch.
3. safety and energy-saving LNG skid filling station according to claim 1, is characterized in that: the gas phase mouth of described LNG tank car is communicated with the gas phase pipe of LNG storage tank, and the BOG gas while unloading in LNG storage tank is filled with LNG tank car by gas phase pipe.
4. safety and energy-saving LNG skid filling station according to claim 1, it is characterized in that: also comprise supercharging vaporizer, the import of supercharging vaporizer connects respectively the liquid outlet of LNG storage tank and LNG low temperature immersed pump, and the outlet of supercharging vaporizer communicates with the inner chamber gas phase of LNG storage tank by gas phase pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210104497.2A CN102635783B (en) | 2012-04-11 | 2012-04-11 | Safe energy-saving LNG (Liquefied Natural Gas) skid-mounted filling station |
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| CN201210104497.2A CN102635783B (en) | 2012-04-11 | 2012-04-11 | Safe energy-saving LNG (Liquefied Natural Gas) skid-mounted filling station |
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| CN102635783B true CN102635783B (en) | 2014-10-08 |
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| CN103032674B (en) * | 2012-12-27 | 2015-04-01 | 青岛捷能高新技术有限责任公司 | Free-lifting skid-mounted LNG filling station |
| CN103292152B (en) * | 2013-05-16 | 2014-12-17 | 沈军 | Integral LNG (liquefied natural gas) filling station |
| CN104514980B (en) * | 2013-09-29 | 2017-05-24 | 宁波绿源液化天然气发展有限公司 | Liquefied natural gas unloading booster skid |
| CN104006289B (en) * | 2013-10-09 | 2015-12-23 | 山东宏达科技集团有限公司 | Skidization fully integrated LNG and LCNG telemonitoring unmanned filling station |
| CN104390127B (en) * | 2014-09-24 | 2016-04-13 | 中国石油集团渤海石油装备制造有限公司 | A kind of filling technique of LNG skid filling station |
| CN104633440A (en) * | 2015-01-30 | 2015-05-20 | 沈军 | LNG refueling station composed of one pump band and multiple gas dispersers |
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| CN108361547B (en) * | 2018-02-02 | 2023-12-15 | 重庆耐德能源装备集成有限公司 | Novel LNG (liquefied Natural gas) filling station and working method thereof |
| CN108426166A (en) * | 2018-05-15 | 2018-08-21 | 张家港艾普能源装备有限公司 | Automatic Regulation LNG liquid addition system |
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| CN109654371B (en) * | 2019-01-31 | 2023-06-16 | 陕西融科低温设备有限公司 | Intelligent ultralow-temperature liquid unloading device and unloading process |
| CN110332459B (en) * | 2019-07-31 | 2024-02-06 | 新地能源工程技术有限公司 | Automatic filling device and method for ultralow-temperature liquid |
| CN111365610B (en) * | 2020-04-01 | 2024-04-26 | 江苏国富氢能技术装备股份有限公司 | Discharging pressure regulating system applied to hydrogen storage type hydrogenation station |
| CN112963730B (en) * | 2021-03-25 | 2022-09-30 | 厚普清洁能源(集团)股份有限公司 | Pressure-stabilizing constant-flow control system and method for LNG multi-immersed pump marine filling sledge |
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Address after: 401329 Chongqing Jiulongpo Baishiyi town Hailong Village 8 Applicant after: Chongqing Juchuang Metering Equipment Co.,Ltd. Address before: 401120, No. 9, Yubei District Airport Industrial Park, Chongqing Applicant before: Chongqing Juchuang Metering Equipment Co.,Ltd. |
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