CN102230574B - Liquefied natural gas (LNG) station with multifunctional air temperature type heating device - Google Patents
Liquefied natural gas (LNG) station with multifunctional air temperature type heating device Download PDFInfo
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Abstract
The invention discloses a liquefied natural gas (LNG) station with a multifunctional air temperature type heating device. The LNG station comprises a pipeline system consisting of pipelines, a tank truck connected with the pipeline system, a low-temperature immersed pump 3, an LNG storage tank 1, an LNG dispenser 4 and an energy action group (EAG) reheater 5. Due to the installation of the pipeline system, one multifunctional air temperature type heating device can be used for pressurizing the tank truck (without a pump) by unloading, pressurizing the LNG storage tank and adjusting the pressure of the LNGT storage tank, and the multifunctional air temperature type heating device and the EAG reheater are combined into a whole; therefore, the number of equipment, the space and the cost investment of the LNG station are reduced and the LNG station is easy to operate.
Description
Technical field
The present invention relates to LNG gas station aerating technical field, relate in particular to the LNG gas station with multi-functional air temperature type heating equipment.
Background technique
LNG is the abbreviation of LNG Liquefied natural gas, and it is that rock gas is dewatered, takes off hydrocarbon, desulfurization, removing CO
2After purified treatment, liquefaction is processed and is formed when low temperature, and main component is methane.Adopt LNG can greatly reduce transportation and the carrying cost of rock gas.Therefore, the LNG fuel automobile is one of main direction of future automobile development.
Because the gas engine that the LNG fuel automobile configures has certain requirement to fuel, its normal operation need to have specified pressure range, in order to satisfy this requirement, just saturation pressure need to be lower than the LNG fuel adjustment of setting pressure and remain to the needed pressure range of motor car engine, then be filled in the vehicle steel cylinder.This pressure regulation process is finished in the LNG gas station usually.Therefore the LNG gas station needs a LNG storage tank pressure regulation vaporizer, realizes the pressure regulation to LNG in the LNG storage tank, so that the LNG under the saturation pressure after the pressure regulation is filled in the vehicle steel cylinder, makes LNG fuel automobile source of the gas supply pressure stable.
Existing LNG gas station, generally include four devices with heating function, be respectively: the storage tank automatic pressure intensifier of pressurized machine of unloading that is used for tanker vehicle unloading (not using pump), the supercharging of a LNG storage tank, pressure regulation vaporizer that is used for the pressure regulation of LNG storage tank, one are used for excess BOG and diffuse the EAG recuperator of front the pre-heat treatment.At present existing LNG filling gas station equipment is various, take up room large, layout is difficult.
Summary of the invention
Technical problem to be solved by this invention provides the LNG gas station with multi-functional air temperature type heating equipment, the multi-functional air temperature type heating equipment of this LNG gas station has tanker vehicle unloading (not using pump) supercharging, LNG storage tank simultaneously from three kinds of functions of supercharging, the pressure regulation of LNG storage tank, reduce the taking up room of place (or sled) of LNG gas station, make that LNG gas station structure is compacter, layout is simplified more.
The present invention addresses the above problem the technological scheme that adopts: have the LNG gas station of multi-functional air temperature type heating equipment, comprise tank car, low temperature immersed pump, LNG storage tank, LNG filling machine, multi-functional air temperature type heating equipment; Described tank car is provided with tank car and unloads liquid mouth, tank car supercharging liquid outlet and tank car supercharging gas returning port; Described low temperature immersed pump is provided with pump liquid entering hole and pump liquid outlet; Described LNG filling machine is provided with aerating import and aerating gas returning port; Described multi-functional air temperature type heating equipment comprises supercharging feed liquor pressure regulation return-air compound interface and the supercharging return-air pressure regulation feed liquor compound interface that is located at its both sides;
Described supercharging feed liquor pressure regulation return-air compound interface is connected with tank car supercharging liquid outlet by the pipeline that is provided with tank car supercharging inlet valve, pipeline between tank car supercharging inlet valve and the supercharging feed liquor pressure regulation return-air compound interface is also by being provided with the supercharging pressure regulator valve and being connected the pipeline of force regulating valve and being connected with the bottom of LNG storage tank, and described supercharging pressure regulator valve and from force regulating valve also one in parallel be provided with the pressure regulation of LNG storage tank by the pipeline of valve;
Described supercharging return-air pressure regulation feed liquor compound interface is connected with the top of LNG storage tank by the pipeline that is provided with storage tank supercharging return-air valve, pipeline between storage tank supercharging return-air valve and the supercharging return-air pressure regulation feed liquor compound interface also connects two branch roads, one is connected with tank car supercharging gas returning port by the pipeline that is provided with tank car supercharging return-air valve, and another is connected with the pump liquid outlet of low temperature immersed pump by the pipeline that is provided with the storage tank pressure regulator valve;
The pump liquid outlet of described low temperature immersed pump is connected with the top of LNG storage tank by the pipeline that is provided with upper liquid feed valve; The pump liquid entering hole is connected with the bottom of LNG storage tank by the pipeline that is provided with lower liquid feed valve, also unloads the liquid mouth by the pipeline that is provided with the tank car liquid feed valve with tank car simultaneously and is connected;
The aerating import of described LNG filling machine is connected with the pump liquid outlet by pipeline, and the aerating gas returning port is connected with the bottom of LNG storage tank.
Described low temperature immersed pump also is provided with the gas-liquid equilibrium interface, described gas-liquid equilibrium interface is connected with tank car supercharging gas returning port by the pipeline that is provided with the gas-liquid equilibrium valve, and the device for cleaning pipeline piping between gas-liquid equilibrium valve and the low temperature immersed pump gas-liquid equilibrium interface partly is connected with the gas-phase space of LNG storage tank.
Pipeline between the aerating import of LNG filling machine and the pump liquid outlet of low temperature immersed pump is provided with safety valve.
On the pipeline between the gas-phase space part of described storage tank supercharging return-air valve and LNG storage tank the blowdown piping unit that comprises the EAG recuperator is set.
Described EAG recuperator and multi-functional air temperature type heating equipment are designed to one by welding up and down.
In the technique scheme, dual mode is arranged during tanker vehicle unloading.A kind of mode is: have pump to unload, during the operation of low temperature immersed pump, use the low temperature immersed pump to carry out unloading of tank car.When unloading, the LNG in the tank car flows out through after the supercharging of low temperature immersed pump from tank car under the driving of low temperature immersed pump, and the liquid Space part that enters the LNG storage tank is unloaded thereby finish.Another kind of mode is: unload without pump, this mode need to be carried out supercharging to LNG in the tank car; When unloading supercharging without pump, utilize multi-functional air temperature type heating equipment that tank car is carried out supercharging, make the LNG pressure in the tank car be higher than the LNG pressure of storage tank; Open the related valve on tank car and the LNG storage tank, the LNG in the tank car is passed through the pressure reduction metaideophone in the LNG storage tank, thereby finish unloading of LNG.The principle of supercharging of unloading is: connect tank car and LNG storage tank associated pipe by flexible pipe; LNG in the tank car enters multi-functional air temperature type heater via supercharging feed liquor pressure regulation return-air compound interface, and LNG by pressure regulation return-air supercharging feed liquor compound interface out, returns the tank car gas phase after multi-functional air temperature type heater inside is heated vaporization; Thereby make the LNG pressure in the tank car be higher than the LNG pressure of storage tank.
Multi-functional air temperature type heater also has the LNG storage tank from supercharging and LNG storage tank voltage regulation function in the LNG of the present invention gas station except above-mentioned (not using pump) function of increasing pressure of unloading of mentioning.
In LNG gas station running, when the LNG pressure of storage tank in the LNG gas station is lower than setting pressure, LNG in the LNG storage tank enters multi-functional air temperature type heater via supercharging feed liquor pressure regulation return-air compound interface, get back to the gas-phase space part of LNG storage tank by supercharging return-air pressure regulation feed liquor compound interface again, thereby the LNG storage tank is realized from supercharging.
The LNG storage tank pressure regulation normally LNG aerating in the LNG storage tank was carried out before vehicle steel cylinder.When the LNG saturation pressure (or temperature) in the LNG storage tank is lower than setting pressure (or temperature), need to carry out pressure regulation to the LNG storage tank, during pressure regulation, LNG in the LNG storage tank is through the low temperature immersed pump, enter multi-functional air temperature type heater by supercharging return-air pressure regulation feed liquor compound interface, by supercharging feed liquor pressure regulation return-air compound interface out, get back to LNG storage tank liquid phase again.Thereby realize the pressure regulation to the LNG storage tank, to satisfy the required minimum saturation pressure of the normal operation of LNG automobile.
In sum, the invention has the beneficial effects as follows:
1, the gas station of manufacturing of the present invention has reduced equipment, place, cost investment, easy and simple to handle.
2, tanker vehicle unloading of the present invention can adopt the low temperature immersed pump to unload, and also can adopt without pump and unload, and LNG is unloaded have two kinds of unloading ways that complement one another, and increases unloading way for subsequent use and makes its operation more stable.
3, the present invention is by the innovative design to LNG gas station flow process, realize that tanker vehicle unloading (without pump) supercharging, LNG storage tank share a heating equipment from supercharging, the pressure regulation of LNG storage tank, the equipment that reduces with respect to prior art comprises LNG storage tank pressure regulation vaporizer or tanker vehicle unloading pressurized machine; The minimizing of number of devices has also reduced the operating cost of LNG gas station.
4, the present invention adopts integrated design with EAG recuperator and multi-functional air temperature type heating equipment, makes the structure of LNG gas station compacter, and occupied ground is less.
Description of drawings
1, Fig. 1 is the LNG gas station schematic flow sheet with multi-functional air temperature type heating equipment, and this multi-functional air temperature type heating equipment has LNG storage tank (without pump) supercharging, LNG storage tank function from supercharging and the pressure regulation of LNG storage tank of unloading.
2, Fig. 2 is with the multi-functional air temperature type heating equipment of Fig. 1 and the LNG gas station schematic flow sheet of EAG recuperator Combination Design.
Each reference character is among the figure: the 1-LNG storage tank; The multi-functional air temperature type heating equipment of 2-; 3-low temperature immersed pump; The 4-LNG filling machine; The 5-EAG recuperator; The 601-tank car unloads the liquid mouth; 602-tank car supercharging liquid outlet; 603-tank car supercharging gas returning port; 7-blowdown piping unit; 301-pump liquid entering hole; 302-pump liquid outlet; 401-aerating import; 402-aerating gas returning port; A-supercharging feed liquor pressure regulation return-air compound interface; B-supercharging return-air pressure regulation feed liquor compound interface; V1-tank car supercharging inlet valve; V2-supercharging pressure regulator valve; Valve is passed through in the pressure regulation of V3-LNG storage tank; V4-storage tank supercharging return-air valve; V5-tank car supercharging return-air valve; V6-storage tank pressure regulator valve; The upper liquid feed valve of V7-; Liquid feed valve under the V8-; V9-tank car liquid feed valve; V10-gas-liquid equilibrium valve; Vc1-is from force regulating valve; The vc2-safety valve; The unidirectional liquid feed valve of cv1, cv2-.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 1, the multi-functional air temperature type heating equipment of LNG gas station has LNG storage tank (without pump) supercharging, LNG storage tank function from supercharging and the pressure regulation of LNG storage tank of unloading.
This LNG gas station comprises tank car, low temperature immersed pump 3, LNG storage tank 1, LNG filling machine 4, the EAG recuperator 5 that connects setting according to certain pipeline connecting mode.
Tank car is provided with tank car and unloads liquid mouth 601, tank car supercharging liquid outlet 602 and tank car supercharging gas returning port 603; Low temperature immersed pump 3 is provided with pump liquid entering hole 301 and pump liquid outlet 302; LNG filling machine 4 is provided with aerating import 401 and aerating gas returning port 402; Multi-functional air temperature type heating equipment 2 comprises supercharging feed liquor pressure regulation return-air compound interface A and the supercharging return-air pressure regulation feed liquor compound interface B that is located at its both sides.
In the present embodiment, pipeline connecting mode is:
Supercharging feed liquor pressure regulation return-air compound interface A is connected with tank car supercharging liquid outlet 602 by the pipeline that is provided with tank car supercharging inlet valve V1, pipeline between tank car supercharging inlet valve V1 and the supercharging feed liquor pressure regulation return-air compound interface A is also by being provided with supercharging pressure regulator valve V2 and being connected the pipeline of force regulating valve vc1 and being connected with the bottom of LNG storage tank, and described supercharging pressure regulator valve V2 and from force regulating valve vc1 also one in parallel be provided with the pressure regulation of LNG storage tank by the pipeline of valve V3.
Supercharging return-air pressure regulation feed liquor compound interface B is connected with the top of LNG storage tank by the pipeline that is provided with storage tank supercharging return-air valve V4, pipeline between storage tank supercharging return-air valve V4 and the supercharging return-air pressure regulation feed liquor compound interface B also connects two branch roads, one is connected with tank car supercharging gas returning port 603 by the pipeline that is provided with tank car supercharging return-air valve V5, and another is connected with the pump liquid outlet 302 of low temperature immersed pump 3 by the pipeline that is provided with storage tank pressure regulator valve V6.
The pump liquid outlet 302 of low temperature immersed pump 3 also is connected with the top of LNG storage tank by the pipeline that is provided with upper liquid feed valve V7; Pump liquid entering hole 301 is connected with the bottom of LNG storage tank by the pipeline that is provided with lower liquid feed valve V8, also unloads liquid mouth 601 by the pipeline that is provided with tank car liquid feed valve V9 with tank car simultaneously and is connected.
The aerating import 401 of LNG filling machine also is connected with pump liquid outlet 302 by pipeline, and aerating gas returning port 402 is connected with the bottom of LNG storage tank.
The low temperature immersed pump also is provided with the gas-liquid equilibrium interface, described gas-liquid equilibrium interface is connected with tank car supercharging gas returning port 603 by the pipeline that is provided with gas-liquid equilibrium valve V10, and the device for cleaning pipeline piping between gas-liquid equilibrium valve V10 and the low temperature immersed pump gas-liquid equilibrium interface partly is connected with LNG storage tank gas-phase space.
For guaranteeing the one-way flow of liquid in the low temperature immersed pump, near the pump liquid entering hole 301 of low temperature immersed pump, be provided with unidirectional liquid feed valve cv1; Be provided with unidirectional liquid feed valve cv2 near the pump liquid outlet 302.
Pipeline between the aerating import 401 of LNG filling machine and the pump liquid outlet 302 of low temperature immersed pump 3 is provided with safety valve vc2, is used for cutting off under the state of emergency aerating flow process.
The operating process of the present embodiment is:
Tank car without the pump supercharging of unloading:
When unloading supercharging, connect tank car and LNG storage tank by flexible pipe; Close V4, V10 valve, open V1, V5 valve, at this moment, LNG in the tank car by tank car supercharging liquid outlet 602 out, V1 enters multi-functional air temperature type heater from supercharging feed liquor pressure regulation return-air compound interface A end through tank car supercharging inlet valve, brought out by supercharging return-air pressure regulation feed liquor compound interface B again, V5 gets back to the tank car gas phase by tank car supercharging gas returning port 603 through tank car supercharging return-air valve; Thereby realize the supercharging to tank car.Be that the interior LNG pressure of tank car is higher than the LNG pressure of storage tank; LNG in the tank car just by pressure reduction by the flexible pipe metaideophone in the LNG storage tank, thereby finish unloading of LNG.
2.LNG storage tank pressure regulation:
When the LNG saturation pressure (or temperature) in the LNG storage tank is lower than setting pressure (or temperature), need to carry out pressure regulation to the LNG storage tank, to satisfy the required minimum saturation pressure of the normal operation of LNG automobile.Close V1, V2, V4, V7, V5, V10 and vc2 valve, open V8, V3, V6 valve.At this moment, LNG in the LNG storage tank is flowed out by tank bottom, enter the low temperature immersed pump through lower liquid feed valve V8, unidirectional liquid feed valve cv1 by pump liquid entering hole 301, again by pump liquid outlet 302 out, pass through storage tank pressure regulator valve V6, enter multi-functional air temperature type heater by supercharging return-air pressure regulation feed liquor compound interface B end, LNG after the heating supercharging vaporization is brought out by supercharging feed liquor pressure regulation return-air compound interface A, by valve V3, gets back to the liquid phase of LNG tank bottom through the pressure regulation of LNG storage tank.Thereby realize the pressure regulation to the LNG storage tank.
3.LNG storage tank is from supercharging:
In LNG gas station running, when the LNG pressure of storage tank in the LNG gas station is lower than setting pressure, close V3, V1 valve, open the V2 valve.At this moment, effect by the pressure regulator valve vc1 that relies on oneself that arranges, LNG in the LNG storage tank is flowed out by the bottom, through supercharging pressure regulator valve V2 and self-care modulating valve vc1, A holds multi-functional air temperature type heating equipment by supercharging feed liquor pressure regulation return-air compound interface, after being brought out by supercharging return-air pressure regulation feed liquor compound interface B, through storage tank supercharging return-air valve V4, get back to the top of LNG storage tank, thereby realized storage tank is carried out Automatic-boosting.
4. tank car is unloaded through pump
When tank car is unloaded through pump, close V6, V8 valve and vc2 valve, open V9, V7 valve; LNG in the tank car is through tank car liquid feed valve V9, unidirectional liquid feed valve cv1, by pump liquid entering hole 301 enter the low temperature immersed pump pressurized after, flow out from pump liquid outlet 302, through unidirectional liquid feed valve cv2, upper liquid feed valve V7, enter the LNG storage tank from the top of LNG storage tank, unload thereby finish.
The present embodiment is substantially the same manner as Example 1, and its difference only is: described EAG recuperator 5 is designed to one with multi-functional air temperature type heating equipment 2 by welding up and down.After EAG recuperator 5 and multi-functional air temperature type heating equipment 2 were integrally welded, EAG recuperator 5 all not have change with the pipeline connecting mode of multi-functional air temperature type heating equipment 2 inside, and therefore, all operations method of operation is also identical with embodiment 1.But after adopting this integrated design, the number of devices of LNG gas station is reduced, structure is compacter, makes the layout between the equipment also more convenient.
As mentioned above, just can realize preferably the present invention.
Claims (5)
1. have the LNG gas station of multi-functional air temperature type heating equipment, it is characterized in that, comprise tank car, low temperature immersed pump (3), LNG storage tank (1), LNG filling machine (4), multi-functional air temperature type heating equipment (2); Described tank car is provided with tank car and unloads liquid mouth (601), tank car supercharging liquid outlet (602) and tank car supercharging gas returning port (603); Described low temperature immersed pump is provided with pump liquid entering hole (301) and pump liquid outlet (302); Described LNG filling machine is provided with aerating import (401) and aerating gas returning port (402); Described multi-functional air temperature type heating equipment comprises supercharging feed liquor pressure regulation return-air compound interface (A) and the supercharging return-air pressure regulation feed liquor compound interface (B) that is located at its both sides; Described supercharging feed liquor pressure regulation return-air compound interface (A) is connected with tank car supercharging liquid outlet (602) by the pipeline that is provided with tank car supercharging inlet valve (V1), pipeline between tank car supercharging inlet valve (V1) and the supercharging feed liquor pressure regulation return-air compound interface (A) is also by being provided with supercharging pressure regulator valve (V2) and being connected the pipeline of force regulating valve (vc1) and being connected with the bottom of LNG storage tank, and described supercharging pressure regulator valve (V2) and from force regulating valve (vc1) also one in parallel be provided with the pressure regulation of LNG storage tank by the pipeline of valve (V3); Described supercharging return-air pressure regulation feed liquor compound interface (B) is connected with the top of LNG storage tank by the pipeline that is provided with storage tank supercharging return-air valve (V4), pipeline between storage tank supercharging return-air valve (V4) and the supercharging return-air pressure regulation feed liquor compound interface (B) also connects two branch roads, one is connected with tank car supercharging gas returning port (603) by the pipeline that is provided with tank car supercharging return-air valve (V5), and another is connected with the pump liquid outlet (302) of low temperature immersed pump (3) by the pipeline that is provided with storage tank pressure regulator valve (V6); The pump liquid outlet (302) of described low temperature immersed pump (3) is connected with the top of LNG storage tank by the pipeline that is provided with upper liquid feed valve (V7); Pump liquid entering hole (301) is connected with the bottom of LNG storage tank by the pipeline that is provided with lower liquid feed valve (V8), also unloads liquid mouth (601) by the pipeline that is provided with tank car liquid feed valve (V9) with tank car simultaneously and is connected;
The aerating import (401) of described LNG filling machine is connected with pump liquid outlet (302) by pipeline, and aerating gas returning port (402) is connected with the bottom of LNG storage tank.
2. the LNG gas station with multi-functional air temperature type heating equipment according to claim 1, it is characterized in that, described low temperature immersed pump also is provided with the gas-liquid equilibrium interface, described gas-liquid equilibrium interface is connected with tank car supercharging gas returning port (603) by the pipeline that is provided with gas-liquid equilibrium valve (V10), and the device for cleaning pipeline piping between gas-liquid equilibrium valve (V10) and the low temperature immersed pump gas-liquid equilibrium interface partly is connected with the gas-phase space of LNG storage tank.
3. the LNG gas station with multi-functional air temperature type heating equipment according to claim 2, it is characterized in that: the pipeline between the aerating import (401) of LNG filling machine and the pump liquid outlet (302) of low temperature immersed pump (3) is provided with safety valve (vc2).
4. the LNG gas station with multi-functional air temperature type heating equipment according to claim 1, it is characterized in that, on the pipeline between the gas-phase space part of described storage tank supercharging return-air valve (V4) and LNG storage tank the blowdown piping unit (7) that comprises EAG recuperator (5) is set.
5. the LNG gas station with multi-functional air temperature type heating equipment according to claim 4 is characterized in that: described EAG recuperator (5) is designed to one with multi-functional air temperature type heating equipment (2) by welding up and down.
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| CN 201110131603 CN102230574B (en) | 2011-05-20 | 2011-05-20 | Liquefied natural gas (LNG) station with multifunctional air temperature type heating device |
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| CN103322410B (en) * | 2012-03-21 | 2015-01-28 | 中国海洋石油总公司 | Unpowered prying-mounted liquefied natural gas refueling station |
| CN102913752B (en) * | 2012-11-14 | 2014-03-05 | 张家港富瑞特种装备股份有限公司 | Unloading and liquid adding device for skid-type liquid adding station and unloading and liquid adding method |
| CN103672394B (en) * | 2013-12-02 | 2015-09-16 | 青岛捷能高新技术有限责任公司 | A kind of without pump LNG refueling system and LNG Liquefied natural gas processing method |
| CN104132244A (en) * | 2014-07-29 | 2014-11-05 | 天津安耐吉燃气技术有限公司 | L-CNG station natural gas continuous and stable supply device and control method |
| 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 |
| CN108626568B (en) * | 2018-07-12 | 2024-04-26 | 成都深冷科技有限公司 | Low-energy-consumption LNG (liquefied Natural gas) filling system with BOG (boil off gas) recycling function and filling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000120993A (en) * | 1998-10-14 | 2000-04-28 | Yazaki Corp | Liquefied gas vaporization system |
| JP4593262B2 (en) * | 2004-12-20 | 2010-12-08 | 伊藤工機株式会社 | Liquefied fuel gas vaporization system |
| CN101058401B (en) * | 2006-04-21 | 2012-01-11 | 中国国际海运集装箱(集团)股份有限公司 | LNG pressure regulating system and pressure regulating method thereof |
| CN101520128B (en) * | 2009-03-24 | 2011-02-09 | 罗东晓 | Movable type method and device for supplying liquid phase natural gas and gas phase natural gas |
| CN102032437A (en) * | 2009-09-28 | 2011-04-27 | 张家港圣汇气体化工装备有限公司 | Unloading and pressure regulating composite booster for liquefied natural gas filling station |
| CN202056514U (en) * | 2011-05-20 | 2011-11-30 | 成都深冷科技有限公司 | Liquefied natural gas (LNG) filling station with multifunctional air temperature type heating device |
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