CN203532188U - LNG (Liquefied Natural Gas) vacuum pump liquid pool device for liquid nitrogen precooling and cold insulation - Google Patents
LNG (Liquefied Natural Gas) vacuum pump liquid pool device for liquid nitrogen precooling and cold insulation Download PDFInfo
- Publication number
- CN203532188U CN203532188U CN201320692555.8U CN201320692555U CN203532188U CN 203532188 U CN203532188 U CN 203532188U CN 201320692555 U CN201320692555 U CN 201320692555U CN 203532188 U CN203532188 U CN 203532188U
- Authority
- CN
- China
- Prior art keywords
- liquid nitrogen
- lng
- cylinder
- barrel
- outer cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides an LNG (Liquefied Natural Gas) vacuum pump liquid pool device for liquid nitrogen precooling and cold insulation. The LNG vacuum pump liquid pool device is characterized by comprising an outer cylinder, a middle cylinder arranged inside the outer cylinder, and an inner cylinder arranged inside the middle cylinder, wherein the top ends of the outer cylinder, the middle cylinder and the inner cylinder are all fixedly connected to a pump pool cover; a low temperature immersed pump is arranged inside the inner cylinder; an LNG liquid outlet pipe extends in the inner cylinder after penetrating through the pump pool cover; a vacuum heat insulation layer is arranged in a space between the outer cylinder and the middle cylinder; a liquid nitrogen layer is arranged in a space between the middle cylinder and the inner cylinder; an LNG liquid inlet pipe extends in the inner cylinder after penetrating through the cylinder wall of the outer cylinder, the vacuum heat insulation layer, the cylinder wall of the middle cylinder, the liquid nitrogen layer and the cylinder wall of the inner cylinder; a liquid nitrogen inlet pipe and a liquid nitrogen outlet pipe extends in the liquid nitrogen layer after penetrating through the cylinder wall of the outer cylinder, the vacuum heat insulation layer and the cylinder wall of the middle cylinder. According to the LNG vacuum pump liquid pool device, the LNG cold insulation effect can be improved, the precooling during operation is reduced, and the operational reliability of the equipment is improved.
Description
Technical field
The utility model relates to a kind of LNG equipment, particularly a kind of LNG vacuum liquid pump pool device of pre-cold-peace cold insulation that LNG vacuum pump liquid pool carried out with liquid nitrogen.
Background technique
Along with the development of new-energy automobile, LNG Liquefied natural gas (LNG) Vehicle Fueling Station is risen just rapidly at home.LNG has the clear superiorities such as safety economy, clean and effective environmental protection, efficiency of storage height with respect to other traditional vehicle fuel as automotive fuel.Under the call reducing discharging at response national energy-saving, use LNG as alternative fuel for cars, not only can effectively reduce environmental pollution and alleviate that petroleum resources are in short supply and the pressure that brings meanwhile, is also the optimal selection that realizes sustainable economic development and improve environment.
Along with country is to the reinforcement of energy-saving and emission-reduction work attention degree and improve the process of human habitat work, LNG aerating will become the main alternative energy source of city bus and intercity transportation in the future.
LNG vacuum pump pond is the product of Hyundai Motor new energy development, the essential equipment of LNG automobile liquid filling station, in LNG vacuum pump pond, place immersed pump, both for LNG liquid feeding provides power, be also simultaneously can be for accelerating the LNG function of unloading, so LNG vacuum pump pond be one of important core equipment of each liquid filling station.
LNG immersed pump pond is applicable to the media such as liquid nitrogen, liquid hydrogen, liquid natural gas (LNG), is widely used in LNG Vehicle Fueling Station HeLNG receiving terminal, fills, storage tank and liquid conveying etc.Low temperature immersed pump pump pond, is embedded in the pump housing in the body of pump pond, saves the required pre-cool time of device start, uses with the opening.
Under prior art condition, low temperature immersed pump pump pond as shown in Figure 1, comprise outer cylinder body 2 ' and be contained in the inner barrel 4 ' within outer cylinder body 2 ', space between outer cylinder body 2 ' and inner barrel 4 ' is vacuum heat-insulating layer 24 ', in inner barrel 4 ', be equipped with low temperature immersed pump 7 ', outer cylinder body 2 ' top is fixed with pump pond lid 12 ', after the LNG liquid inlet pipe 5 ' barrel through the barrel of outer cylinder body 2 ', vacuum heat-insulating layer 24 ', inner barrel 4 ', stretch in inner barrel 4 ', LNG drain pipe 14 ' stretches in inner barrel 4 ' after through pump pond lid 12 '.
Traditional low temperature immersed pump pump pond as shown in Figure 1 adopts two layers of wall design of inner core body wall and urceolus body wall, and inner barrel 4 ' is for splendid attire LNG, and inner barrel 4 ' is vacuum heat-insulating layer 24 ' with the interlayer of outer cylinder body 2 ', plays the effect of cold insulation.Although the low temperature immersed pump pump pond of this two layers of wall design is simple in structure and manufacture cost is lower,, its pre-cool time relative time when operation is longer, and precooling has consumed a certain amount of LNG, has wasted the energy, and cold insulation poor effect.
Model utility content
The utility model provides a kind of LNG vacuum liquid pump device of Liquid nitrogen precooler cold insulation, and object is to solve the technical problem that existing two layers of wall design low temperature immersed pump pump pond exists, and improves LNG cold insulation effect, and the precooling while reducing operation, improves equipment operational reliability.
The utility model technological scheme adopting of dealing with problems is:
A kind of LNG vacuum liquid pump pool device of Liquid nitrogen precooler cold insulation, it is characterized in that: comprise outer cylinder body, be contained in middle cylindrical shell in outer cylinder body, be contained in the middle of inner barrel in cylindrical shell, the upper end of described outer cylinder body, middle cylindrical shell and inner barrel is all connected in pump pond and covers; In inner barrel, be equipped with low temperature immersed pump; LNG drain pipe stretches in inner barrel through after pump Chi Gai; Space between outer cylinder body and middle cylindrical shell is vacuum heat-insulating layer; Space between middle cylindrical shell and inner barrel is liquid nitrogen layer; After the barrel of LNG liquid inlet pipe through the barrel of the barrel of outer cylinder body, vacuum heat-insulating layer, middle cylindrical shell, liquid nitrogen layer, inner barrel, stretch into inner barrel; Liquid nitrogen inlet tube, through the barrel of outer cylinder body, stretches into liquid nitrogen layer after the barrel of vacuum heat-insulating layer, middle cylindrical shell; Liquid nitrogen outer pipe, through the barrel of outer cylinder body, stretches into liquid nitrogen layer after the barrel of vacuum heat-insulating layer, middle cylindrical shell.
The beneficial effects of the utility model:
1. traditional low temperature immersed pump pump pond is adopted to two layers of wall design, inner container is for splendid attire LNG, and outside sandwich vacuum heat-insulating layer plays the effect of cold insulation, changes into three layers of wall construction, and inner container is for splendid attire LNG, and intermediate course is used for filling liquid nitrogen (LN
2), outside sandwich is vacuum heat-insulating layer, and intermediate liquid nitrogen layer and outside sandwich vacuum heat-insulating layer all play the effect of cold insulation, and this has just formed twice cold insulation.This twice cold insulation layer makes cold damage be down to the limit, for immersed pump has been created operating conditions completely.
2. by middle level container, be full of liquid nitrogen (LN2), due to the normal atmosphere of liquid nitrogen, depressing boiling point is-196 ℃, suitable low of the temperature of liquid nitrogen when normal pressure, ℃ also lower 34 ℃ than boiling point-162 of LNG Liquefied natural gas (LNG), once contact and will promptly seethe with excitement with body surface, also can take away quite a large amount of heat energy simultaneously.Therefore, use liquid nitrogen to be full of mesosphere, low temperature immersed pump pump pond, liquid nitrogen is as precooling medium and cool preservation medium, by liquid nitrogen, absorbed the heat of LNG Liquefied natural gas (LNG), exempt precooling, guarantee that low temperature immersed pump is at any time in low-temperature condition, guarantee that immersed pump can at any time can start, move.
3. the utility model, when immersed pump turns round, adopts Liquid nitrogen precooler while needing precooling, does not need to consume LNG and carrys out precooling, and effectively having avoided becomes BOG gas and discharge the loss that causes LNG Liquefied natural gas owing to need to carrying out liquefied natural gas vaporization that precooling etc. causes.And liquid nitrogen ton valency is only 1/4～1/3 of LNG Liquefied natural gas ton valency, and the cold of liquid nitrogen is higher than LNG Liquefied natural gas, therefore the amount of liquid nitrogen of actual consumption is also than LNG Liquefied natural gas amount still less, so, the utlity model has very significantly economic benefit.
4. the utility model adopts Liquid nitrogen precooler, the cold of liquid nitrogen is higher than LNG Liquefied natural gas, ℃ also lower 34 ℃ than boiling point-162 of LNG Liquefied natural gas (LNG), thereby, can effectively reduce or avoid the LNG Liquefied natural gas (LNG) in the inner container of low temperature immersed pump pump pond to be vaporizated into BOG.
5. the utility model adopts Liquid nitrogen precooler cold insulation, even exempt precooling, in immersed pump pond, temperature can remain on lower than below-150 ℃, running time, the BOG gas producing in immersed pump pond is few, can effectively avoid immersed pump to suck gas, thereby, improve to greatest extent immersed pump maintainability, extended immersed pump working life.
6. the utility model is simple in structure, and cryogenic vacuum immersed pump pool structure relatively of the prior art is more scientific, and rationally practicability is stronger, and energy-saving effect is outstanding, is suitable for applying in places such as LNG Vehicle Fueling Station or LNG loading and discharging portses.
7. the pump housing and motor are immersed in medium completely, thereby have stopped the loss of product and guaranteed the quick startup of pump; It is minimum that nothing sealing and infiltrative type design are down to maintenance requirement; The design of erect type makes pump running more stable, and running life is longer.
8. the low temperature immersed pump pump pool structure comparison of the low temperature immersed pump pump pond of this three layers of wall design and two layers of wall design, is between LNG layer and vacuum heat-insulating layer, to have increased a liquid nitrogen layer, has increased LN
2liquid in-out pipe, and other mouth of pipe in pump pond is substantially constant, it is how many that pump pond monnolithic case does not increase yet, and installing space also changes not quite.When operation, LN2 storage tank and the LN2 flow process pipeline of certain little volume need to be set.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art;
Fig. 2 is the utility model structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further details.
Three layers, cryogenic vacuum immersed pump pond wall construction, comprises base plate 1 as shown in Figure 2, outer cylinder body 2 and flange 14, and outer cylinder body 2 two ends form respectively the barrel of outer cylinder body with base plate 1 and flange 14 welding; Comprise middle level end socket 3, middle cylindrical shell 5 and flange 14, the barrel of cylindrical shell in the middle of cylindrical shell 5 two ends in middle level form with middle level end socket 3 and flange 14 welding respectively; Comprise interior end socket 4, inner barrel 6 and flange 14, inner barrel 6 two ends form respectively the barrel of inner barrel with interior end socket 4 and flange 14 welding; The barrel of the barrel of outer cylinder body, the barrel of middle cylindrical shell and inner barrel forms three layers of wall of cryogenic pump sump, and the space between outer cylinder body 2 and middle cylindrical shell 5 is vacuum heat-insulating layer 25, and vacuum valve is set above, forms vacuum layer, plays heat-blocking action; By the space between middle cylindrical shell 5 and inner barrel 6, it is liquid nitrogen layer 56, liquid nitrogen inlet tube 7 is through the barrel of outer cylinder body, after the barrel of vacuum heat-insulating layer 25, middle cylindrical shell, stretch into liquid nitrogen layer 56, liquid nitrogen outer pipe 12 is through the barrel of outer cylinder body, after the barrel of vacuum heat-insulating layer 25, middle cylindrical shell, stretch into liquid nitrogen layer 56, liquid nitrogen inlet tube 7 and liquid nitrogen outer pipe 12, for liquid nitrogen being full of to liquid nitrogen layer 56, play the effect of precooling cold insulation; After LNG liquid inlet pipe 8 barrel through the barrel of the barrel of outer cylinder body, vacuum heat-insulating layer 25, middle cylindrical shell, liquid nitrogen layer 56, inner barrel, stretch into inner barrel 6.Flange 14 is connected with bolt 16 with pump pond lid 17, between flange 14 and pump pond lid 17, is provided with seal ring 15.The upper end of outer cylinder body 2, middle cylindrical shell 5 and inner barrel 6 is all connected on pump pond lid 17 like this.LNG drain pipe 18 stretches in inner barrel 6 after covering 17 through pump pond, and inner barrel 6 can fill LNG Liquefied natural gas LNG.In inner barrel 6, be equipped with low temperature immersed pump 10.Also be provided with the mouths of pipe such as LNG residual liquid discharge mouth 9, LNG discharge opeing gas port 11, rock gas drain 13.
During fabrication, each parts of cryogenic pump sump all adopt stainless steel material to make, and are wound around flame retardant type compound insulating material in the inwall filling of outer cylinder body 2, and are evacuated to high vacuum, play heat-blocking action.
In use, by liquid nitrogen inlet tube 7, to liquid nitrogen layer 56, pass into liquid nitrogen, make liquid nitrogen layer 56 be full of liquid nitrogen, nitrogen and the liquid nitrogen fluid-mixing of part heat absorption vaporization are discharged from liquid nitrogen outer pipe 12, reach the pre-cold-peace cold insulation effect of the LNG Liquefied natural gas in inner barrel 6 (LNG).The structure of inner barrel 6 is the same with former two layers of wall construction cryogenic vacuum immersed pump pond with aspects such as operation and maintenances.
Because the utility model adopts two layers of wall design to change into three layers of wall construction in traditional low temperature immersed pump pump pond, increased liquid nitrogen layer 56 for filling liquid nitrogen (LN
2), make liquid nitrogen layer 56 and vacuum heat-insulating layer 25 all play the effect of cold insulation, this has just formed twice cold insulation.This twice cold insulation layer makes cold damage be down to the limit, for immersed pump has been created operating conditions completely.
Because being used liquid nitrogen, the utility model is full of liquid nitrogen layer 56, liquid nitrogen is as precooling medium and cool preservation medium, by liquid nitrogen, absorbed the heat of LNG Liquefied natural gas (LNG), guarantee that low temperature immersed pump is at any time in low-temperature condition, guarantee that immersed pump can at any time can start, move.
Claims (1)
1. the LNG vacuum liquid pump pool device of a Liquid nitrogen precooler cold insulation, it is characterized in that: comprise outer cylinder body, be contained in the middle cylindrical shell in outer cylinder body, the inner barrel in the middle of being contained in cylindrical shell, the top of described outer cylinder body, middle cylindrical shell and inner barrel is all connected in pump pond and covers; In inner barrel, be equipped with low temperature immersed pump; LNG drain pipe stretches in inner barrel through after pump Chi Gai; Space between outer cylinder body and middle cylindrical shell is vacuum heat-insulating layer; Space between middle cylindrical shell and inner barrel is liquid nitrogen layer; After the barrel of LNG liquid inlet pipe through the barrel of the barrel of outer cylinder body, vacuum heat-insulating layer, middle cylindrical shell, liquid nitrogen layer, inner barrel, stretch into inner barrel; Liquid nitrogen inlet tube, through the barrel of outer cylinder body, stretches into liquid nitrogen layer after the barrel of vacuum heat-insulating layer, middle cylindrical shell; Liquid nitrogen outer pipe, through the barrel of outer cylinder body, stretches into liquid nitrogen layer after the barrel of vacuum heat-insulating layer, middle cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320692555.8U CN203532188U (en) | 2013-11-05 | 2013-11-05 | LNG (Liquefied Natural Gas) vacuum pump liquid pool device for liquid nitrogen precooling and cold insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320692555.8U CN203532188U (en) | 2013-11-05 | 2013-11-05 | LNG (Liquefied Natural Gas) vacuum pump liquid pool device for liquid nitrogen precooling and cold insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203532188U true CN203532188U (en) | 2014-04-09 |
Family
ID=50418402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320692555.8U Expired - Lifetime CN203532188U (en) | 2013-11-05 | 2013-11-05 | LNG (Liquefied Natural Gas) vacuum pump liquid pool device for liquid nitrogen precooling and cold insulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203532188U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940231A (en) * | 2017-12-22 | 2018-04-20 | 北京石油化工学院 | A kind of low cold damage running gear of liquefied natural gas filling station |
| CN116241795A (en) * | 2023-01-28 | 2023-06-09 | 中科富海(杭州)气体工程科技有限公司 | Device capable of stably storing air of liquid instrument |
-
2013
- 2013-11-05 CN CN201320692555.8U patent/CN203532188U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940231A (en) * | 2017-12-22 | 2018-04-20 | 北京石油化工学院 | A kind of low cold damage running gear of liquefied natural gas filling station |
| CN116241795A (en) * | 2023-01-28 | 2023-06-09 | 中科富海(杭州)气体工程科技有限公司 | Device capable of stably storing air of liquid instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103672394B (en) | A kind of without pump LNG refueling system and LNG Liquefied natural gas processing method | |
| WO2017031986A1 (en) | Lng fueling station employing bog energy storage and pressure differential | |
| CN101520128B (en) | Movable type method and device for supplying liquid phase natural gas and gas phase natural gas | |
| CN103711720A (en) | Full-vacuum horizontal liquefied natural gas (LNG) submerged pump pool | |
| CN104006295A (en) | Method and apparatus for displacement type pressure conveying of low-temperature liquefied gas | |
| KR102543434B1 (en) | Loading system of liquid hydrogen storage tank for ship | |
| CN203532188U (en) | LNG (Liquefied Natural Gas) vacuum pump liquid pool device for liquid nitrogen precooling and cold insulation | |
| CN203656565U (en) | Pump-free LNG (Liquefied Natural Gas) filling system | |
| CN204610385U (en) | Immersed pump pump pond | |
| CN203431477U (en) | Horizontal type double-layer underground storage tank | |
| CN204387677U (en) | A kind of skid-mounted gas filling station | |
| CN212537494U (en) | Discharging pressure regulating system applied to hydrogen storage type hydrogen adding station | |
| CN202834721U (en) | Efficient insulating LNG (Liquefied Natural Gas) relay pump tank | |
| CN203796601U (en) | Full vacuum horizontal LNG immersed pump sump | |
| CN106352232A (en) | Skid-mounted liquefied natural gas injection device | |
| CN204387673U (en) | LNG skid gas station | |
| CN202452100U (en) | Full-vacuum low-temperature pump pool | |
| CN203533190U (en) | Tank-pump integrated structure used for LNG filling station | |
| CN205447254U (en) | Liquefied natural gas liquid feeding system | |
| CN208442572U (en) | A kind of LNG low-temperature storage tank convenient for safeguarding | |
| CN203404607U (en) | Multifunctional valve box | |
| CN209960215U (en) | Pressure reduction device that LNG removed storage tank used | |
| CN203463252U (en) | LNG (liquefied natural gas) pump sump | |
| CN111365610A (en) | Discharging pressure regulating system applied to hydrogen storage type hydrogen adding station | |
| CN205716405U (en) | The loading system at station is built jointly for LNG filling station and LNG gasification station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |