CN107449220A - The re-liquefied recovery systems of BOG and the re-liquefied recovery process of BOG - Google Patents
The re-liquefied recovery systems of BOG and the re-liquefied recovery process of BOG Download PDFInfo
- Publication number
- CN107449220A CN107449220A CN201710847225.4A CN201710847225A CN107449220A CN 107449220 A CN107449220 A CN 107449220A CN 201710847225 A CN201710847225 A CN 201710847225A CN 107449220 A CN107449220 A CN 107449220A
- Authority
- CN
- China
- Prior art keywords
- bog
- lng
- storage tank
- lng storage
- refrigeration machine
- 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.)
- Pending
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 44
- 238000003860 storage Methods 0.000 claims abstract description 85
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 238000005057 refrigeration Methods 0.000 claims abstract description 44
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000003949 liquefied natural gas Substances 0.000 description 120
- 239000007789 gas Substances 0.000 description 18
- 239000012071 phase Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to LNG Technology field, more particularly to a kind of re-liquefied recovery systems of BOG and the re-liquefied recovery process of BOG.The re-liquefied recovery systems of BOG, including LNG storage tank, BOG pressurizing packs and refrigeration machine.LNG storage tank, for storing LNG liquid.BOG pressurizing packs, it is connected by BOG outgoing lines with LNG storage tank to export BOG, and suitable for being pressurized to BOG.Refrigeration machine, the refrigeration machine input are connected by pipeline with BOG pressurizing packs, and the output end of refrigeration machine is connected by LNG incoming lines with LNG storage tank, and suitable for BOG liquefaction is imported into LNG storage tank to pass through LNG incoming lines after LNG.
Description
Technical field
The present invention relates to LNG Technology field, more particularly to a kind of re-liquefied recovery systems of BOG and BOG it is re-liquefied
Recovery process.
Background technology
Liquefied natural gas（LNG）It is a kind of high-quality clean energy resource, its main component is methane, its combustion heat value is high,
Environmental pollution is slight.With the cry more and more higher for improving environmental quality, LNG is increasingly subject to the attention of people, wide at present
It is applied to generally in resident living, motor vehicle fuel, generating and other various industrial applications.In recent years, auto industry face
Face the severe challenge of energy issue of world and environmental protection problem, LNG is as motor vehicle fuel by world many countries weight
Depending on and promote, compared with gasoline, diesel oil and compressed natural gas, LNG has the advantages that the feature of environmental protection, economy and security, LNG
Automobile has become the new development trend of gas-fueled vehicles industry.
In order to meet the aerating demand of LNG automobiles, the quantity of LNG gas stations is increasing, by the end of the end of the year 2014, entirely
The LNG gas stations about 2000 that state puts into operation, more LNG gas stations are in construction and planning, it is contemplated that to the year two thousand twenty, the whole nation
Build up about 5000 LNG gas stations.
But during LNG filling, unloading etc., produced due to the huge temperature difference between environment temperature and low temperature LNG
Loss of refrigeration capacity, cause LNG constantly heated and produce boil-off gas（BOG）.According to available data, the BOG of LNG gas stations is typically all
Direct emptying processing, does not recycle, wastes and pollute huge.
The existing Patents technology of comparative analysis, such as CN105927848A, CN106195617A, CN104132239B and
CN103759497B, way of recycling flow disclosed in these patents is complicated, and is required for extra one LNG storage of increase to hold
Device, this undoubtedly adds the total measurement (volume) of LNG gas stations LNG storage tank, and standard NB/T 1001-2011 " liquefied natural gas（LNG）
Vehicle Fueling Station technical specification ", is disagreed.In addition, the cold output of refrigeration machine, uses BOG and heat exchanger free convection mostly
Heat exchange, local depression area is formed for LNG by re-liquefied, " pressure difference " is consequently formed, drives BOG flowing, this mode exchanges heat
Efficiency is low, and cold output matching is difficult, easily causes heat exchanger frosting or icing.These problems directly results in BOG recovery effects
Rate is low, and system flow is complicated, limits its popularization and application in LNG Vehicle Fueling Stations.
The content of the invention
The first object of the present invention is to provide a kind of re-liquefied recovery systems of BOG, and to solve, floor space is small, flow is simple
And the technical problem that liquefaction efficiency is high.
The second object of the present invention is to provide a kind of re-liquefied recovery process of BOG, simple and liquefaction efficiency is high with flow
Technical problem.
What the re-liquefied recovery systems of BOG of the present invention were realized in：
A kind of re-liquefied recovery systems of BOG, including：
LNG storage tank, for storing LNG liquid；
BOG pressurizing packs, it is connected by BOG outgoing lines with the LNG storage tank to export BOG, and suitable for increasing to BOG
Pressure；
Refrigeration machine, the refrigeration machine input are connected by pipeline with BOG pressurizing packs, and the output end of the refrigeration machine passes through
LNG incoming lines are connected with LNG storage tank, and suitable for BOG liquefaction is imported into LNG storage tank to pass through LNG incoming lines after LNG.
Further, the BOG outgoing lines include one suitable for being horizontally inserted at the side end socket of the LNG storage tank
Tracheae is taken in LNG storage tank；And
The LNG incoming lines include one and are suitable to tilt time liquid in insertion LNG storage tank at the side end socket of the LNG storage tank
Pipe；
The liquid back pipe is located at the end that the end on the outside of LNG storage tank is higher than on the inside of LNG storage tank.
Further, the LNG incoming lines are obliquely installed, and the end to connect with refrigeration machine is higher than itself and LNG storage tank
The end to connect；And
The angle of inclination that pipeline before being located at liquid back pipe on the LNG incoming lines is in relative to LNG storage tank bottom face is big
In the angle of inclination that liquid back pipe is in relative to LNG storage tank bottom face.
Further, the length for taking tracheae to be placed in LNG storage tank is more than the length that liquid back pipe is placed in LNG storage tank.
Further, the BOG outgoing lines are provided with a gas outlet cryogenic globe valve；And
The LNG incoming lines are provided with a liquid inlet cryogenic globe valve.
Further, the pipeline that the BOG pressurizing packs are connected with refrigeration machine is provided with a low temperature regulating valve.
Further, the port of export of the cool end heat exchanger of the refrigeration machine is higher than the top of the LNG storage tank.
Further alternative, the BOG pressurizing packs include a low temperature blower fan.
Further alternative, the BOG pressurizing packs include connected normal temperature blower fan and heat exchanger；
The heat exchanger has first flow and second flow channel；Wherein
One end of the first flow is connected by the BOG outgoing lines with the LNG storage tank, and the other end is connected to normal temperature wind
The entrance of machine；
One end of the second flow channel is connected with the outlet of normal temperature blower fan, and the other end passes through the pipeline and refrigeration machine input phase
Even.
What the re-liquefied recovery process of BOG of the present invention was realized in：
A kind of re-liquefied recovery process of BOG, using the described re-liquefied recovery systems of BOG, and including：
Step S1, the BOG that will be derived from the low-temperature condition of LNG storage tank carry out pressurized treatment；
Step S2, it is LNG by the BOG liquefaction of the low-temperature condition after pressurized treatment；
Step S3, the LNG formed after liquefaction is imported into LNG storage tank and recycled.
Beneficial effects of the present invention are：The re-liquefied recovery systems of BOG and the re-liquefied recovery process of BOG of the present invention, use
Refrigeration machine provides cold, and liquefaction recovery BOG mode is not limited by external conditions such as regions, and system flow is simple, and by gas
The LNG that liquid is formed after the BOG processing of state carries out recycling, high financial profit.Due to the BOG quilts discharged from LNG storage tank
Re-using cools down to itself, is finally returned to LNG storage tank, therefore can improve the BOG rate of recovery；Avoid substantial amounts of
BOG, which is escaped into, pollutes environment in air.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the structure chart of the re-liquefied recovery systems of BOG of embodiments of the invention 1；
Fig. 2 is the structure chart of the re-liquefied recovery systems of BOG of embodiments of the invention 2.
In figure：LNG storage tank 1, LNG liquid 2, take tracheae 3, liquid back pipe 4, gas outlet cryogenic globe valve 5, low temperature blower fan 6,
Low temperature regulating valve 7, refrigeration machine 8, liquid inlet cryogenic globe valve 9, heat exchanger 10, normal temperature blower fan 11, BOG outgoing lines 12, LNG are led
Enter pipeline 13.
Embodiment
To make the purpose, technical scheme and advantage of embodiment of the present invention clearer, implement below in conjunction with the present invention
Accompanying drawing in mode, the technical scheme in embodiment of the present invention is clearly and completely described, it is clear that described reality
The mode of applying is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, belongs to the present invention
The scope of protection.
Therefore, the detailed description of the embodiments of the present invention to providing in the accompanying drawings is not intended to limit requirement guarantor below
The scope of the present invention of shield, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, belongs to the present invention
The scope of protection.
Embodiment 1：
As depicted in figs. 1 and 2, the invention provides a kind of re-liquefied recovery systems of BOG, suitable for LNG gas stations, including：
LNG storage tank 1, BOG pressurizing packs and refrigeration machine 8.
LNG storage tank 1, for storing LNG liquid 2.The LNG low-temperature storage tanks of the present embodiment are exhausted for the vacuum of horizontal double-decker
Hot low-temperature pressure container, inner pressurd vessel form vacuum interlayer, and for storing low temperature LNG liquid 2, outer container is protective layer.And store up
Two-way gas phase pipe is drawn in tank upper gaseous phase space, tracheae 3 is taken as BOG all the way, all the way as LNG liquid back pipes 4.
BOG pressurizing packs, it is connected by BOG outgoing lines 12 with LNG storage tank 1 to export BOG, and suitable for being carried out to BOG
Supercharging.The BOG pressurizing packs of the present embodiment include a low temperature blower fan 6.
Refrigeration machine 8, the input of refrigeration machine 8 are connected by pipeline with the low temperature blower fan 6 of BOG pressurizing packs, and refrigeration
The output end of machine 8 is connected by LNG incoming lines 13 with LNG storage tank 1, and suitable for BOG liquefaction is imported after LNG by LNG
Pipeline 13 imports LNG storage tank 1.
Refrigeration machine 8 and BOG blower fans arrange that minimum range is optional to be set to 2 meters more than 2 meters, makes both to meet close to LNG storage tank 1
Industry relevant criterion, and can ensure BOG organic efficiency.
It is suitable to be horizontally inserted LNG storage tank 1 at the side end socket of LNG storage tank 1 specifically, BOG outgoing lines 12 include one
Interior takes tracheae 3, the mode being horizontally inserted compared in existing many re-liquefied recovery systems of BOG using be inserted perpendicularly into by the way of
For, it can avoid inserting BOG outgoing lines 12 in the liquid phase tissue in LNG storage tank 1, so as to improve from gas phase tissue aspiration
Gaseous state BOG efficiency.And LNG incoming lines 13 include one and are suitable to tilt insertion LNG storages at the side end socket of LNG storage tank 1
Liquid back pipe 4 in tank 1；The end that liquid back pipe 4 is located at the outside of LNG storage tank 1 is higher than positioned at the end of the inner side of LNG storage tank 1.
Preferably, LNG incoming lines 13 are obliquely installed, and the end to connect with refrigeration machine 8 is higher than itself and the phase of LNG storage tank 1
The end connect, inclined design, with gravity, to improve the smooth degree that re-liquefied LNG imports LNG storage tank 1, the fortune of gravity
With reducing the use of many pumps in the prior art, more energy efficient environmental protection.
Preferably, the pipeline on LNG incoming lines 13 before liquid back pipe 4 is in relative to the bottom face of LNG storage tank 1
Angle of inclination is more than the angle of inclination that liquid back pipe 4 is in relative to the bottom face of LNG storage tank 1, and so design is to ensure liquid again
The LNG liquid 2 of change smoothly can flow out from the cool end heat exchanger 10 of refrigeration machine 8, and liquid back pipe 4 is relative to the bottom face of LNG storage tank 1
The angle of inclination for being in is unsuitable excessive, is to prevent the excessive liquid phase group that may insert LNG storage tank 1 in the angle of inclination of liquid back pipe 4
In knitting, and then avoid the LNG in LNG storage tank 1 from blocking the port of liquid back pipe 4 and cause back the resistance of liquid process, further ensure that
Re-liquefied LNG liquid 2 can be flowed into smoothly in LNG storage tank 1.
Preferably, the length for taking tracheae 3 to be placed in LNG storage tank 1 is more than the length that liquid back pipe 4 is placed in LNG storage tank 1, makes
Liquid back pipe 4 is obtained closer to the internal face of LNG storage tank 1, is easy under liquid runs down wall flow, reduction is evaporated, and takes the length of tracheae 3
More than liquid back pipe 4, can avoid influenceing back liquid.
More specifically, BOG outgoing lines 12 are provided with a gas outlet cryogenic globe valve 5；And set on LNG incoming lines 13
There is a liquid inlet cryogenic globe valve 9.
The refrigeration machine 8 of the present embodiment is using such as, but not limited to mixture throttling refrigerating machine, G-M refrigeration machines, pulse tube
Any of refrigeration machine, sterlin refrigerator or hot sound refrigerating machine.
The pipeline that the low temperature blower fan 6 of BOG pressurizing packs is connected with refrigeration machine 8 is provided with a low temperature regulating valve 7, design it is low
Warm regulating valve 7 is used to adjust the BOG tolerance and lift into refrigeration machine 8.
The port of export of the cool end heat exchanger 10 of refrigeration machine 8 is higher than the top of LNG storage tank 1, specifically, the cold end of refrigeration machine 8
Difference in height between the port of export of heat exchanger 10 and the top of LNG storage tank 1 is designed at least as 0.5 meter of difference in height, to ensure again
Liquefied LNG liquid 2 smoothly can flow out from the cool end heat exchanger 10 of refrigeration machine 8, and smoothly flow into LNG storage tank 1.
The re-liquefied recovery system specific embodiments of BOG of the present embodiment are the BOG gas of gas-phase space in LNG storage tank 1
Body is by taking tracheae 3 and gas outlet cryogenic globe valve 5 to be inhaled into low temperature blower fan 6, by low after the pressurization of low temperature blower fan 6
Warm regulating valve 7 is discharged into the cool end heat exchanger 10 of refrigeration machine 8, BOG forced-convection heat transfers in the cool end heat exchanger 10 of refrigeration machine 8,
The cold that BOG absorption refrigerating machines 8 provide, liquefy as LNG, LNG is along inclined LNG incoming lines 13, in gravity and pressure difference
Under collective effect, exported along the cool end heat exchanger 10 of refrigeration machine 8, liquid inlet cryogenic globe valve 9, and inclined liquid back pipe 4
It is back in LNG storage tank 1.
Embodiment 2：
On the basis of embodiment 1, the re-liquefied recovery systems of BOG of the present embodiment and the re-liquefied recovery systems of BOG of embodiment 1
General configuration is identical, and difference is, the BOG pressurizing packs of the present embodiment include connected normal temperature blower fan 11 and heat exchanger 10.Often
Warm air machine 11 passes through VFC flow.
Heat exchanger 10 has first flow and second flow channel；Wherein one end of first flow by BOG outgoing lines 12 with
LNG storage tank 1 is connected, and the other end is connected to the entrance of normal temperature blower fan 11；One end of second flow channel connects with the outlet of normal temperature blower fan 11
Connect, the other end is connected by pipeline with the input of refrigeration machine 8.
The re-liquefied recovery system specific embodiments of BOG of the present embodiment are the BOG gas of gas-phase space in LNG storage tank 1
By taking tracheae 3 and gas outlet cryogenic globe valve 5 to be inhaled into normal temperature blower fan 11, BOG's body is exchanging heat before normal temperature blower fan 11 is entered
Rewarming is normal temperature in device 10, after the supercharging by normal temperature blower fan 11, first passes through heat exchanger 10 and cools, then pass through low temperature regulating valve 7
The cool end heat exchanger 10 of refrigeration machine 8, BOG forced-convection heat transfers in the cool end heat exchanger 10 of refrigeration machine 8 are discharged into, BOG absorbs system
The cold that cold 8 provides, re-liquefied is LNG, and LNG is along inclined LNG incoming lines 13, in the collective effect of gravity and pressure difference
Under, exported along the cool end heat exchanger 10 of refrigeration machine 8, liquid inlet cryogenic globe valve 9, and inclined liquid back pipe 4 is back to LNG
In storage tank 1.
Embodiment 3：
On the basis of embodiment 1 or embodiment 2, a kind of re-liquefied recovery process of BOG is present embodiments provided, using embodiment
1 or the re-liquefied recovery systems of BOG of embodiment 2, and including：
Step S1, the BOG that will be derived from the low-temperature condition of LNG storage tank 1 carry out pressurized treatment；
Step S2, it is LNG by the BOG liquefaction of the low-temperature condition after pressurized treatment；
Step S3, the LNG formed after liquefaction importings LNG storage tank 1 is recycled.
The re-liquefied recovery process of BOG of the present embodiment is reclaimed the LNG that liquid is formed after gaseous BOG processing again sharp
With high financial profit.Itself is cooled down because the BOG discharged from LNG storage tank 1 is re-used, is finally returned to LNG storages
Tank 1, therefore the BOG rate of recovery can be improved, avoid substantial amounts of BOG from escaping into and environment is polluted in air, realize BOG " zero-emission
Put ".
It is complete by above-mentioned description, relevant staff using the above-mentioned desirable embodiment according to the present invention as enlightenment
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.
In the description of the invention, it is to be understood that the term of indicating position or position relationship is based on shown in accompanying drawing
Orientation or position relationship, be for only for ease of the description present invention and simplify description, rather than instruction or imply signified equipment
Or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, or should
Invention product using when the orientation usually put or position relationship, be for only for ease of the description present invention and simplify description, without
It is instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and can not manage
Solve to indicate or implying relative importance.
In addition, the term such as term " level ", " vertical ", " pendency " is not offered as requiring part abswolute level or pendency, and
It is to be slightly tilted.Such as " level " only refers to that its direction is more horizontal with respect to for " vertical ", is not to represent the structure
Must be fully horizontal, but can be slightly tilted.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with or below second feature
Directly contacted including the first and second features, can also include the first and second features not be direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above to include fisrt feature special second
Directly over sign and oblique upper, or be merely representative of fisrt feature level height and be higher than second feature.Fisrt feature second feature it
Under, lower section and fisrt feature included below are immediately below second feature and obliquely downward, or be merely representative of fisrt feature level height
Less than second feature.
Claims (10)
- A kind of 1. re-liquefied recovery systems of BOG, it is characterised in that including：LNG storage tank, for storing LNG liquid；BOG pressurizing packs, it is connected by BOG outgoing lines with the LNG storage tank to export BOG, and suitable for increasing to BOG Pressure；Refrigeration machine, the refrigeration machine input are connected by pipeline with BOG pressurizing packs, and the output end of the refrigeration machine passes through LNG incoming lines are connected with LNG storage tank, and suitable for BOG liquefaction is imported into LNG storage tank to pass through LNG incoming lines after LNG.
- 2. the re-liquefied recovery systems of BOG according to claim 1, it is characterised in that it is suitable that the BOG outgoing lines include one It is horizontally inserted at the side end socket from the LNG storage tank in LNG storage tank and takes tracheae；AndThe LNG incoming lines include one and are suitable to tilt time liquid in insertion LNG storage tank at the side end socket of the LNG storage tank Pipe；The liquid back pipe is located at the end that the end on the outside of LNG storage tank is higher than on the inside of LNG storage tank.
- 3. the re-liquefied recovery systems of BOG according to claim 2, it is characterised in that the LNG incoming lines are tilted and set Put, and the end to connect with refrigeration machine is higher than the end that it connects with LNG storage tank；AndThe angle of inclination that pipeline before being located at liquid back pipe on the LNG incoming lines is in relative to LNG storage tank bottom face is big In the angle of inclination that liquid back pipe is in relative to LNG storage tank bottom face.
- 4. the re-liquefied recovery systems of BOG according to any one of Claims 2 or 3, it is characterised in that described to take tracheae to be placed in Length in LNG storage tank is more than the length that liquid back pipe is placed in LNG storage tank.
- 5. the re-liquefied recovery systems of BOG according to claim 1, it is characterised in that the BOG outgoing lines are provided with one Gas outlet cryogenic globe valve；AndThe LNG incoming lines are provided with a liquid inlet cryogenic globe valve.
- 6. the re-liquefied recovery systems of BOG according to claim 1, it is characterised in that the BOG pressurizing packs and refrigeration machine Connected pipeline is provided with a low temperature regulating valve.
- 7. the re-liquefied recovery systems of BOG according to claim 1, it is characterised in that the cool end heat exchanger of the refrigeration machine The port of export be higher than the LNG storage tank top.
- 8. the re-liquefied recovery systems of BOG according to claim 1, it is characterised in that it is low that the BOG pressurizing packs include one Warm air machine.
- 9. the re-liquefied recovery systems of BOG according to claim 1, it is characterised in that the BOG pressurizing packs include being connected Normal temperature blower fan and heat exchanger；The heat exchanger has first flow and second flow channel；WhereinOne end of the first flow is connected by the BOG outgoing lines with the LNG storage tank, and the other end is connected to normal temperature wind The entrance of machine；One end of the second flow channel is connected with the outlet of normal temperature blower fan, and the other end passes through the pipeline and refrigeration machine input phase Even.
- 10. a kind of re-liquefied recovery process of BOG, it is characterised in that using the BOG liquid again as described in any one of claim 1~9 Change recovery system, and including：Step S1, the BOG that will be derived from the low-temperature condition of LNG storage tank carry out pressurized treatment；Step S2, it is LNG by the BOG liquefaction of the low-temperature condition after pressurized treatment；Step S3, the LNG formed after liquefaction is imported into LNG storage tank and recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710847225.4A CN107449220A (en) | 2017-09-19 | 2017-09-19 | The re-liquefied recovery systems of BOG and the re-liquefied recovery process of BOG |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710847225.4A CN107449220A (en) | 2017-09-19 | 2017-09-19 | The re-liquefied recovery systems of BOG and the re-liquefied recovery process of BOG |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107449220A true CN107449220A (en) | 2017-12-08 |
Family
ID=60497042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710847225.4A Pending CN107449220A (en) | 2017-09-19 | 2017-09-19 | The re-liquefied recovery systems of BOG and the re-liquefied recovery process of BOG |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107449220A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109506126A (en) * | 2018-11-30 | 2019-03-22 | 上海海威斯特保温工程有限公司 | A kind of re-liquefied fuel dispensing system of small-sized LNG fuel ship BOG |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445052A (en) * | 2011-12-16 | 2012-05-09 | 南京林业大学 | Biogas liquefaction process and device for scattered gas source point |
| EP2715259A1 (en) * | 2011-05-30 | 2014-04-09 | Wärtsilä Oil & Gas Systems AS | Utilization of lng used for fuel to liquefy lpg boil off |
| CN103759497A (en) * | 2014-01-16 | 2014-04-30 | 上海交通大学 | Mounting structure of small skid-mounted evaporation gas reliquefaction and recovery device for liquefied natural gas |
| CN104197186A (en) * | 2014-08-28 | 2014-12-10 | 四川中油天能科技有限公司 | BOG recycling system of LNG gas station and realizing method of BOG recycling system |
| KR20160120164A (en) * | 2015-04-07 | 2016-10-17 | 현대중공업 주식회사 | Treatment system of liquefied natural gas |
| CN106440655A (en) * | 2016-08-16 | 2017-02-22 | 中科赛德（北京）科技有限公司 | Skid-mounted liquefying device for recycling BOG (Boil of gas) of LNG (liquefied natural gas) tank car |
| CN207163070U (en) * | 2017-09-19 | 2018-03-30 | 浙江大学常州工业技术研究院 | The re-liquefied recovery systems of BOG |
-
2017
- 2017-09-19 CN CN201710847225.4A patent/CN107449220A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2715259A1 (en) * | 2011-05-30 | 2014-04-09 | Wärtsilä Oil & Gas Systems AS | Utilization of lng used for fuel to liquefy lpg boil off |
| CN102445052A (en) * | 2011-12-16 | 2012-05-09 | 南京林业大学 | Biogas liquefaction process and device for scattered gas source point |
| CN103759497A (en) * | 2014-01-16 | 2014-04-30 | 上海交通大学 | Mounting structure of small skid-mounted evaporation gas reliquefaction and recovery device for liquefied natural gas |
| CN104197186A (en) * | 2014-08-28 | 2014-12-10 | 四川中油天能科技有限公司 | BOG recycling system of LNG gas station and realizing method of BOG recycling system |
| KR20160120164A (en) * | 2015-04-07 | 2016-10-17 | 현대중공업 주식회사 | Treatment system of liquefied natural gas |
| CN106440655A (en) * | 2016-08-16 | 2017-02-22 | 中科赛德（北京）科技有限公司 | Skid-mounted liquefying device for recycling BOG (Boil of gas) of LNG (liquefied natural gas) tank car |
| CN207163070U (en) * | 2017-09-19 | 2018-03-30 | 浙江大学常州工业技术研究院 | The re-liquefied recovery systems of BOG |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109506126A (en) * | 2018-11-30 | 2019-03-22 | 上海海威斯特保温工程有限公司 | A kind of re-liquefied fuel dispensing system of small-sized LNG fuel ship BOG |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103672394B (en) | A kind of without pump LNG refueling system and LNG Liquefied natural gas processing method | |
| CN103759497B (en) | The mounting structure of small-sized prizing liquefied natural gas boil-off gas recovery device of liquefied again | |
| CN207163070U (en) | The re-liquefied recovery systems of BOG | |
| CN105683643A (en) | Fuel tank | |
| CN105927848A (en) | Small device and method for rapidly re-liquefying and recovering liquefied natural gas vapour | |
| CN107449220A (en) | The re-liquefied recovery systems of BOG and the re-liquefied recovery process of BOG | |
| CN105864636A (en) | Pump-free unloading, refueling and filling systems and pump-free filling technology of LNG refueling station | |
| CN105715948A (en) | System and method for recovering BOG gas in LNG gas station through liquefaction | |
| CN102913752A (en) | Unloading and liquid adding device for skid-type liquid adding station and unloading and liquid adding method | |
| CN105179930A (en) | Liquefied natural gas tank car unloading device of liquefied natural gas and compressed natural gas cooperative station and application | |
| CN105416009A (en) | Method for refrigeration recovery of liquefied gas cylinder of power equipment | |
| CN204623062U (en) | A kind of LNG cold energy recycle system for van cooler | |
| CN207848959U (en) | A kind of LNG air supply systems | |
| CN213178918U (en) | A equipment that is used for LNG receiving station and big jar flash distillation gas of transfer station to retrieve | |
| CN205781982U (en) | LNG filling station is unloaded without pump, is filled and charging system | |
| CN108278482A (en) | A kind of liquefied gas at low temp charging system, methods for filling | |
| KR101110318B1 (en) | fuel supply system for natural gas hydrate | |
| CN204987650U (en) | BOG retrieves liquefaction LNG system device | |
| CN205523551U (en) | LNG is cold energy recycle system for refrigerator car | |
| CN205560267U (en) | Liquefied natural gas liquid feeding system with buffer tank | |
| CN206352727U (en) | A kind of novel B OG reliquefaction installations | |
| CN213810009U (en) | Double-gun filling system of hydrogenation machine | |
| CN206310233U (en) | Liquefied natural gas storage tank BOG gas cold energy recycle systems | |
| CN212456248U (en) | Low-temperature high-pressure gas cylinder capable of directly filling LNG and avoiding blow-off BOG | |
| CN104329561B (en) | A kind of system of liquid nitrogen LNG Liquefied natural gas and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171208 |