CN202149353U - Evaporation gas recycling system of liquefied natural gas transfer station - Google Patents
Evaporation gas recycling system of liquefied natural gas transfer station Download PDFInfo
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- CN202149353U CN202149353U CN 201120226170 CN201120226170U CN202149353U CN 202149353 U CN202149353 U CN 202149353U CN 201120226170 CN201120226170 CN 201120226170 CN 201120226170 U CN201120226170 U CN 201120226170U CN 202149353 U CN202149353 U CN 202149353U
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- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 101
- 239000007789 gas Substances 0.000 title claims abstract description 49
- 238000012546 transfer Methods 0.000 title claims abstract description 44
- 238000001704 evaporation Methods 0.000 title claims abstract description 24
- 230000008020 evaporation Effects 0.000 title claims abstract description 24
- 238000004064 recycling Methods 0.000 title abstract 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 179
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 90
- 239000007788 liquid Substances 0.000 claims abstract description 53
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 52
- 230000006835 compression Effects 0.000 claims description 26
- 238000007906 compression Methods 0.000 claims description 26
- 239000003345 natural gas Substances 0.000 claims description 26
- 239000012774 insulation material Substances 0.000 claims description 6
- 238000002309 gasification Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
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Abstract
The utility model relates to an evaporation gas recycling system of a liquefied natural gas transfer station, which comprises a storage tank for storing liquefied natural gas, an evaporation gas compressor, a liquefier, a liquid nitrogen storage tank for storing liquid nitrogen and a liquid nitrogen output pump, wherein the evaporation gas compressor is communicated with a gas-phase space of the storage tank to compress normal-pressure evaporation gas output by the gas-phase space of the storage tank to the storage tank, the liquefier is connected with the evaporation gas compressor to liquefy compressed evaporation gas output by the evaporation gas compressor into the liquefied natural gas, and the liquid nitrogen output pump is connected with the liquid nitrogen storage tank to provide power for the liquid nitrogen in the liquid nitrogen storage tank, so that the liquid nitrogen can be output to the liquefier. The liquefier utilizes the cold quantity of the liquid nitrogen as a cold quantity source for liquefying of the compressed evaporation gas, and the liquefier is connected with the storage tank to output the liquefied natural gas obtained by liquefying to the storage tank for storage. The evaporation gas recycling system can completely recycle the evaporation gas on the premise that environment is not polluted and energy is not wasted, reduces requirements for construction position of the liquefied natural gas transfer station and reduces operation cost.
Description
Technical field
The utility model relates to LNG Liquefied natural gas and stores and transportation art, particularly relates to a kind of boil-off gas reclaiming system of LNG Liquefied natural gas transfer station.
Background technique
LNG Liquefied natural gas (LNG, liquefied natural gas) is that a kind of calorific value is high, the little high-grade energy of combustion pollution.The LNG transfer station is the terminal between LNG receiving station and the LNG user; Its major function is the LNG that receives to come from the small-sized LNG Ship Transportation of LNG receiving station or large-scale natural gas liquefaction factory; It is temporarily stored, and LNG is flowed to LNG user through the LNG tank car.
In the production process of LNG transfer station; Since amount of heat bleed, unload a ship and the entrucking process in volume displaced, flash distillation, the multiple factors such as rapid reduction of atmosphere environment pressure, in LNG storage tank, other LNG equipment and LNG pipeline, can discharge the boil-off gas (BOG, Boil Off Gas) under a certain amount of normal pressure; These BOG are inflammable gas; Cause atmospheric pollution easily, also possibly blast, accident such as fire, therefore; How handling the BOG that is produced under the various operation operating modes safely and effectively, is the very important problem that the LNG transfer station must be faced.
In the existing technology; The LNG transfer station has two kinds of modes (as shown in Figure 1) of handling normal pressure BOG; First kind is directly outer defeated through pipeline, behind the defeated pressure (being generally 0.5MPa-1.0MPa), is defeated by BOG user outward through pipeline outside promptly with the BOG compressor normal pressure BOG being compressed to; Second kind is directly it to be discharged in the air, or burns through flare system.It is thus clear that; First kind of mode need be laid the BOG external transport pipeline around the LNG transfer station, this requires the LNG transfer station must build near BOG user, has also improved the operation cost of LNG transfer station simultaneously greatly; And; Outside BOG user does not need, during defeated BOG, can only take the second way to come treatments B OG, this has caused to the waste of the energy with to the pollution of environment.
Summary of the invention
The utility model technical problem to be solved provides a kind of boil-off gas reclaiming system of LNG Liquefied natural gas transfer station; Can be under free from environmental pollution and the prerequisite that wastes energy; Fully recycle boil-off gas, and weaken the requirement of LNG Liquefied natural gas transfer station installation location and reduce its operation cost.
The technological scheme that the utility model solves the problems of the technologies described above is following: a kind of boil-off gas reclaiming system of LNG Liquefied natural gas transfer station, and this system comprises: the storage tank of storing liquefied rock gas; Pass to the boil-off gas compressor that the atmospheric evaporation gas to its output compresses mutually with the gas-phase space of said storage tank; Link to each other the Compression Evaporation gas-liquid of its output is turned to the liquifier of LNG Liquefied natural gas with said boil-off gas compressor; Store the liquid nitrogen storage tank of liquid nitrogen; The liquid nitrogen rear pump that links to each other with said liquid nitrogen storage tank and to provide power to output to said liquifier with to wherein liquid nitrogen; Wherein,
Said liquifier is originated as the cold that said Compression Evaporation gas is liquefied with the cold of liquid nitrogen, and it links to each other with said storage tank, outputs to said storage tank stores with the LNG Liquefied natural gas that liquefaction is obtained.
On the basis of technique scheme, the utility model can also be done following improvement:
Further, said liquifier also has the nitrogen output tube, and the nitrogen output that is used for the liquid nitrogen gasification that loses cold is formed is used for said LNG Liquefied natural gas transfer station is inner, thereby removes the equipment investment of building liquid nitrogen converter from.
Further, said boil-off gas compressor also has outer defeated pipe, is used for said Compression Evaporation gas is defeated by the boil-off gas user outward.
Further, also comprise: compressed natural gas compressor, compressed natural gas storage tank; Wherein,
Said compressed natural gas compressor links to each other with said boil-off gas compressor, is used for the further boil down to compressed natural gas of said Compression Evaporation gas with its output;
Said compressed natural gas compressor also links to each other with said compressed natural gas storage tank, is used for the said compressed natural gas that compression obtains is transported in the said compressed natural gas storage tank storing.
Further, also comprise the compressed natural gas filling equipment that links to each other with said compressed natural gas storage tank, be used for the said compressed natural gas of said compressed natural gas storage tank stores is filled into external equipment.
Further, said liquid nitrogen rear pump is by motor-driven centrifugal rear pump.
Further, also comprise cold insulated cabinet; Said cold insulated cabinet is wrapped in the outside of said liquifier to reduce the heat transmission between said liquifier and the atmosphere outside, keeps the working state that said liquifier is in low temperature.
Further, the outside space of inner, the said liquifier of said cold insulated cabinet is filled with cold insulation material.
Further, the outside space of inner, the said liquifier of said cold insulated cabinet is filled with air pressure greater than atmospheric nitrogen.
Further, said cold insulated cabinet is provided with: keep in the outside space of inner, the said liquifier of said cold insulated cabinet nitrogen pressure greater than atmospheric inhalation valve.
Further, said cold insulated cabinet is provided with: open the nitrogen discharge mouth of discharging with unnecessary nitrogen when nitrogen pressure surpasses first predefined value in the outside space of inner, the said liquifier of said cold insulated cabinet automatically.
Further, said cold insulated cabinet is provided with: the superpressure safety valve of automatic take-off when nitrogen pressure surpasses second predefined value in the outside space of inner, the said liquifier of said cold insulated cabinet.
The beneficial effect of the utility model is: in the utility model, owing to after boil-off gas compressor atmospheric evaporation air pressure that the LNG Liquefied natural gas transfer station is volatilized is condensed to Compression Evaporation gas, outputs in the liquifier and liquefy; The LNG Liquefied natural gas that liquifier utilizes the cold of liquid nitrogen that the Compression Evaporation gas liquefaction is obtained is transported in the storage tank again and stores; Therefore, storage tank, boil-off gas compressor, liquifier have constituted the gas-liquid conversion cycle circuit of a boil-off gas, and the boil-off gas that the LNG Liquefied natural gas transfer station is volatilized is recycled fully; Neither need boil-off gas be discharged in the air; Thereby avoided the waste of the energy and the pollution of environment, need the LNG Liquefied natural gas transfer station not built near the boil-off gas user again, thereby weaken requirement LNG Liquefied natural gas transfer station installation location; In addition; Building the boil-off gas external transport pipeline neither be necessary as far as the utility model, and therefore, the utility model can reduce the operation cost of LNG Liquefied natural gas transfer station.
Description of drawings
Fig. 1 is the structural drawing of the system of the normal pressure BOG of existing technology processing LNG transfer station generation;
The structural drawing of the BOG reclaiming system of the LNG transfer station that Fig. 2 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing the principle and the characteristic of the utility model are described, institute gives an actual example and only is used to explain the utility model, is not the scope that is used to limit the utility model.
The structural drawing of the BOG reclaiming system of the LNG transfer station that Fig. 2 provides for the utility model.As shown in Figure 2, this system comprises: the storage tank 201 that stores LNG; Pass to the BOG compressor 202 that the normal pressure BOG to its output compresses mutually with the gas-phase space of storage tank 201; Linking to each other with the compression BOG liquefaction with its output with BOG compressor 202 is the liquifier 203 of LNG; Store the liquid nitrogen storage tank 204 of liquid nitrogen; The liquid nitrogen rear pump 205 that links to each other with liquid nitrogen storage tank 204 and to provide power to output to liquifier 203 with to wherein liquid nitrogen; Wherein,
Here; Storage tank 201 is the equipment that stores LNG, and LNG is a liquid, and it is positioned at the lower space of storage tank 201 inside; The BOG of the gaseous state that LNG transfer station each several part volatilizes then concentrates on the upper space of storage tank 201 inside, and this space is the gas-phase space of storage tank 201.
The gas-phase space of storage tank 201 is generally atmospheric pressure state, like air pressure excessive (promptly inner BOG is too much), then need in time carry out pressure release in case storage tank 201 is impaired.Therefore, BOG compressor 202 just need receive the BOG (atmospheric pressure state) that storage tank 201 gas-phase spaces are exported in real time, so that the air pressure of gas-phase space remains normal pressure (getting final product a little more than barometric pressure).
In the utility model; BOG compressor 202 is that the defeated outward pressure of normal pressure BOG boil down to (is generally the equipment of the compression BOG of 0.5MPa-1.0MPa); Its agent structure is a cylinder, thereby circularly the compression of the normal pressure BOG boil down in cylinder BOG is exported through the to-and-fro motion of piston.Certainly, if a BOG compressor is not enough to satisfy power requirements, the BOG compressor 202 in the utility model can be the parallel form of many BOG compressors; In addition, break down in order to prevent BOG compressor 202 shown in Figure 2, thereby the BOG reclaiming system that causes the utility model to provide is paused fully; Subsequent use BOG compressor can also be set; When the BOG main compressor breaks down, start subsequent use BOG compressor immediately, the BOG that is produced with timely processing LNG transfer station; Prevent to damage storage tank, cause pollution environment.
In the utility model, liquifier 203 is the equipment that compression BOG is liquefied, and the used cold source of its liquefaction is liquid nitrogen.Therefore, liquifier 203 is a heat-exchanger rig, and it will compress the heat transferred liquid nitrogen of BOG, thereby makes compression BOG liquefy and be LNG because of losing heat, and simultaneously, the liquid nitrogen that has absorbed heat then gasifies and is nitrogen.The LNG that liquifier 203 obtains liquefaction is transported to storage tank 201 and stores, and promptly accomplishes the processing procedure of BOG.In addition; Because liquifier has produced nitrogen in the course of the work, therefore, liquifier 203 can also have the nitrogen output tube; Being used for losing the nitrogen output that the liquid nitrogen gasification of cold forms uses for the LNG transfer station is inner; Because LNG transfer station itself also need use nitrogen, therefore, the utility model has reduced equipment (like the vaporizer) investment of LNG transfer station aspect liquid nitrogen gasification.Certainly, export nitrogen here and can utilize the nitrogen filling equipment that nitrogen is filled in the nitrogen steel cylinder, also can nitrogen directly be flowed to the nitrogen user through the nitrogen external transport pipeline and use.
Liquid nitrogen rear pump in the utility model can adopt by motor-driven centrifugal rear pump.
LNG and liquid nitrogen all are cryogenic substances; Therefore; The pipeline of the storage tank 201 in the utility model, liquifier 203, liquid nitrogen storage tank 204, liquid nitrogen rear pump 205 and conveying LNG and liquid nitrogen all need use low temperature material to process, and for example adopts 9 low temperature resistant nickel steels and stainless steel material manufacturing.
This shows, in the utility model, because behind the normal pressure BOG boil down to that the BOG compressor volatilizes the LNG transfer station compression BOG; Output in the liquifier and liquefy, liquifier utilizes the cold LNG that liquefaction obtains to compression BOG of liquid nitrogen to be transported in the storage tank again and stores, therefore; Storage tank, BOG compressor, liquifier have constituted the gas-liquid conversion cycle circuit of a BOG, and the BOG that the LNG transfer station is volatilized is recycled fully, neither need BOG be discharged in the air; Thereby avoided the waste of the energy and the pollution of environment, need the LNG transfer station not built near the BOG user again, thereby weaken requirement LNG transfer station installation location; In addition; Building the BOG external transport pipeline neither be necessary as far as the utility model, and therefore, the utility model can reduce the operation cost of LNG transfer station.
Certainly, the utility model does not repel the existence of BOG external transport pipeline, and for example, the BOG compressor 202 in the utility model also has outer defeated pipe, is used for compression BOG is defeated by BOG user outward.
Handle the BOG that LNG receiving station produced except utilizing above-mentioned liquefaction mode; Can also utilize other modes to come treatments B OG; As shown in Figure 2, the BOG reclaiming system that the utility model provides can also comprise: compressed natural gas (CNG) compressor 206, CNG storage tank 207; Wherein,
In addition, this BOG reclaiming system also comprises the CNG filling equipment 208 that links to each other with CNG storage tank 207, is used for the CNG that CNG storage tank 207 stores is filled into external equipment.
The CNG compressor 206 here can be stored in the higher CNG of the further boil down to air pressure of compression BOG of BOG compressor 202 outputs in the CNG storage tank and use to be filled to external equipment by CNG filling equipment 208.For example, the external equipment here can be the CNG fuel automobile, and like this, the CNG filling equipment 208 among Fig. 2 just can be the filling machine that fills CNG fuel to the CNG fuel automobile.
The utility model through liquefaction, recompression, defeated three kinds of modes are come treatments B OG outward, can make full use of the BOG that LNG receiving station is produced, and have practiced thrift the energy, have protected environment, have also taken precautions against the generation of accidents such as the impaired and BOG burning of storage tank, blast simultaneously.
The BOG reclaiming system that the utility model provides can also comprise cold insulated cabinet, and this cold insulated cabinet is wrapped in the outside of liquifier 203 with the heat transmission between minimizing liquifier 203 and the atmosphere outside, thereby keeps the working state that liquifier 203 is in low temperature.
The cold insulated cabinet here is a kind of heat-proof device, and shell carbon steel board capable of using is processed, and cold insulation material (like pearlife etc.) can also be filled in, liquifier 203 outside spaces inner at cold insulated cabinet, with the heat-insulating capability of further lifting cold insulated cabinet., liquifier 203 meets the condensation knot when working in order to prevent the water vapor in the space, cold insulation material place; Destroy the heat-shielding performance of cold insulation material; Preventing also simultaneously that BOG that oxygen and liquifier 203 possibly leak out from meeting burns, explodes; The utility model is also inner at cold insulated cabinet, the outside space of liquifier is filled with air pressure greater than atmospheric nitrogen, so that the air in this space is replaced fully, prevents that simultaneously ambient air (oxygen especially wherein and water vapor) from getting into this space.
In addition; Can also be provided with one or more safety installationss on the cold insulated cabinet; To guarantee that cold insulated cabinet air pressure inside (air pressure of nitrogen) is stabilized in the atmospheric state that is slightly larger than, and for example, can be provided with inhalation valve on cold insulated cabinet; Nitrogen pressure is greater than barometric pressure in the space inner with the maintenance cold insulated cabinet, that liquifier is outside; Its working principle is: when nitrogen pressure higher (the unlatching air pressure upper limit that is higher than inhalation valve), the inhalation valve that is in closed condition is originally opened with nitrogen that will be unnecessary and is discharged, thereby reduces the nitrogen pressure in the space of the inner and liquifier outside of cold insulated cabinet; When nitrogen pressure lower (being lower than the unlatching air pressure lower limit of inhalation valve); The inhalation valve that originally is in closed condition is opened to suck the part air; Thereby improve the air pressure in the space that cold insulated cabinet is inner and liquifier is outside, certainly, the purpose that sucks air is in order to guarantee the stable of air pressure; The oxygen that get into this moment, water vapor etc. can be replaced through the mode that continues input nitrogen, thereby guarantee the proper functioning of cold insulation material and liquifier; Cold insulated cabinet inner with the outside space of liquifier in air pressure when suitable (be higher than the unlatching air pressure lower limit of inhalation valve and be lower than it open the air pressure upper limit), inhalation valve is in closed condition, thereby completely cuts off inside and outside the cold insulated cabinet.
Also the nitrogen discharge mouth can be set on cold insulated cabinet, open automatically so that unnecessary nitrogen is discharged when nitrogen pressure surpasses first predefined value in the space that this nitrogen discharge mouth is inner at cold insulated cabinet, liquifier is outside.
The superpressure safety valve can also be set on cold insulated cabinet, and nitrogen pressure surpasses automatic take-off when (being higher than first predefined value) of second predefined value in the space that this superpressure safety valve is inner at cold insulated cabinet, liquifier is outside, so that unnecessary nitrogen is discharged fast.
In sum, the BOG reclaiming system flexible operation that the utility model provided, simple and reliable, good using effect is arranged, and investment and operating cost are low, good in economic efficiency.
This shows, the utlity model has following advantage:
(1) in the utility model, owing to behind the normal pressure BOG boil down to that the BOG compressor volatilizes the LNG transfer station compression BOG, output in the liquifier and liquefy; Liquifier utilizes the cold LNG that liquefaction obtains to compression BOG of liquid nitrogen to be transported in the storage tank again and stores, and therefore, storage tank, BOG compressor, liquifier have constituted the gas-liquid conversion cycle circuit of a BOG; The BOG that the LNG transfer station is volatilized is recycled fully, neither need BOG be discharged in the air, thereby avoid the waste of the energy and the pollution of environment; Need the LNG transfer station not built near the BOG user again; Thereby weakened the requirement to LNG transfer station installation location, in addition, building the BOG external transport pipeline neither be necessary as far as the utility model; Therefore, the utility model can reduce the operation cost of LNG transfer station.
(2) the utility model through liquefaction, recompression, defeated three kinds of modes are come treatments B OG outward, can make full use of the BOG that LNG receiving station is produced, and have practiced thrift the energy, have protected environment, have also taken precautions against the generation of accidents such as the impaired and BOG burning of storage tank, blast simultaneously.
(3) the BOG reclaiming system that the utility model provided uses liquid nitrogen that the cold that BOG is liquefied is provided; The nitrogen that produces directly supplies the inner use of LNG transfer station; This has saved the investment of LNG transfer station aspect liquid nitrogen converter equipment, has further reduced the integral body investment of LNG Liquefied natural gas transfer station.
(4) the BOG reclaiming system flexible operation that the utility model provided, simple and reliable, good using effect is arranged, and investment and operating cost are low, good in economic efficiency.
The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (12)
1. the boil-off gas reclaiming system of a LNG Liquefied natural gas transfer station is characterized in that, this system comprises: the storage tank of storing liquefied rock gas; Pass to the boil-off gas compressor that the atmospheric evaporation gas to its output compresses mutually with the gas-phase space of said storage tank; Link to each other the Compression Evaporation gas-liquid of its output is turned to the liquifier of LNG Liquefied natural gas with said boil-off gas compressor; Store the liquid nitrogen storage tank of liquid nitrogen; The liquid nitrogen rear pump that links to each other with said liquid nitrogen storage tank and to provide power to output to said liquifier with to wherein liquid nitrogen; Wherein,
Said liquifier is originated as the cold that said Compression Evaporation gas is liquefied with the cold of liquid nitrogen, and it links to each other with said storage tank, outputs to said storage tank stores with the LNG Liquefied natural gas that liquefaction is obtained.
2. system according to claim 1 is characterized in that said liquifier also has the nitrogen output tube, and the nitrogen output that is used for the liquid nitrogen gasification that loses cold is formed is used for said LNG Liquefied natural gas transfer station is inner.
3. system according to claim 1 is characterized in that, said boil-off gas compressor also has outer defeated pipe, is used for said Compression Evaporation gas is defeated by the boil-off gas user outward.
4. system according to claim 1 is characterized in that, also comprises: compressed natural gas compressor, compressed natural gas storage tank; Wherein,
Said compressed natural gas compressor links to each other with said boil-off gas compressor, is used for the further boil down to compressed natural gas of said Compression Evaporation gas with its output;
Said compressed natural gas compressor also links to each other with said compressed natural gas storage tank, is used for the said compressed natural gas that compression obtains is transported in the said compressed natural gas storage tank storing.
5. system according to claim 4 is characterized in that, also comprises the compressed natural gas filling equipment that links to each other with said compressed natural gas storage tank, is used for the said compressed natural gas of said compressed natural gas storage tank stores is filled into external equipment.
6. according to the described system of arbitrary claim among the claim 1-5, it is characterized in that said liquid nitrogen rear pump is by motor-driven centrifugal rear pump.
7. according to the described system of arbitrary claim among the claim 1-5, it is characterized in that, also comprise cold insulated cabinet; Said cold insulated cabinet is wrapped in the outside of said liquifier to reduce the heat transmission between said liquifier and the atmosphere outside, keeps the working state that said liquifier is in low temperature.
8. system according to claim 7 is characterized in that, the outside space of inner, the said liquifier of said cold insulated cabinet is filled with cold insulation material.
9. system according to claim 7 is characterized in that, the outside space of inner, the said liquifier of said cold insulated cabinet is filled with air pressure greater than atmospheric nitrogen.
10. system according to claim 9 is characterized in that, said cold insulated cabinet is provided with: keep in the outside space of inner, the said liquifier of said cold insulated cabinet nitrogen pressure greater than atmospheric inhalation valve.
11. system according to claim 9 is characterized in that, said cold insulated cabinet is provided with: open the nitrogen discharge mouth of discharging with unnecessary nitrogen when nitrogen pressure surpasses first predefined value in the outside space of inner, the said liquifier of said cold insulated cabinet automatically.
12. system according to claim 9 is characterized in that, said cold insulated cabinet is provided with: the superpressure safety valve of automatic take-off when nitrogen pressure surpasses second predefined value in the outside space of inner, the said liquifier of said cold insulated cabinet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120226170 CN202149353U (en) | 2011-06-29 | 2011-06-29 | Evaporation gas recycling system of liquefied natural gas transfer station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120226170 CN202149353U (en) | 2011-06-29 | 2011-06-29 | Evaporation gas recycling system of liquefied natural gas transfer station |
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| CN202149353U true CN202149353U (en) | 2012-02-22 |
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| CN 201120226170 Expired - Lifetime CN202149353U (en) | 2011-06-29 | 2011-06-29 | Evaporation gas recycling system of liquefied natural gas transfer station |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230570A (en) * | 2011-06-29 | 2011-11-02 | 中国寰球工程公司 | System and method for recovering vapour of liquefied natural gas transfer station |
| CN103968242A (en) * | 2014-05-08 | 2014-08-06 | 重庆大学 | Energy-saving liquefied natural gas flash steam recovery device |
| CN104061431A (en) * | 2014-04-03 | 2014-09-24 | 查特深冷工程系统(常州)有限公司 | Modularized BOG (Boil Off Gas) re-liquefaction system of low-temperature liquid storage tank |
| CN105715948A (en) * | 2016-03-14 | 2016-06-29 | 江苏德邦工程有限公司 | System and method for recovering BOG gas in LNG gas station through liquefaction |
| CN103968242B (en) * | 2014-05-08 | 2016-11-30 | 重庆大学 | A kind of energy-saving liquefied natural gas flashed vapour retracting device |
| CN108224082A (en) * | 2018-01-16 | 2018-06-29 | 中科睿凌江苏低温设备有限公司 | A kind of simple and feasible cryogenic gas reliquefaction installation |
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2011
- 2011-06-29 CN CN 201120226170 patent/CN202149353U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230570A (en) * | 2011-06-29 | 2011-11-02 | 中国寰球工程公司 | System and method for recovering vapour of liquefied natural gas transfer station |
| CN104061431A (en) * | 2014-04-03 | 2014-09-24 | 查特深冷工程系统(常州)有限公司 | Modularized BOG (Boil Off Gas) re-liquefaction system of low-temperature liquid storage tank |
| CN104061431B (en) * | 2014-04-03 | 2016-09-14 | 查特深冷工程系统(常州)有限公司 | The modular cryogenic liquid basin re-liquefied system of BOG gas |
| CN103968242A (en) * | 2014-05-08 | 2014-08-06 | 重庆大学 | Energy-saving liquefied natural gas flash steam recovery device |
| CN103968242B (en) * | 2014-05-08 | 2016-11-30 | 重庆大学 | A kind of energy-saving liquefied natural gas flashed vapour retracting device |
| CN105715948A (en) * | 2016-03-14 | 2016-06-29 | 江苏德邦工程有限公司 | System and method for recovering BOG gas in LNG gas station through liquefaction |
| CN108224082A (en) * | 2018-01-16 | 2018-06-29 | 中科睿凌江苏低温设备有限公司 | A kind of simple and feasible cryogenic gas reliquefaction installation |
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Address after: Two road 100012 Beijing city Chaoyang District high tech Industrial Park, No. 1. Patentee after: China Global Engineering Co. Ltd. Address before: 100029 Beijing city Chaoyang District cherry Garden Street No. 7 Patentee before: China Huanqiu Engineering Co. |
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Granted publication date: 20120222 |