CN106918197A - A kind of BOG reclaims reliquefaction installation - Google Patents
A kind of BOG reclaims reliquefaction installation Download PDFInfo
- Publication number
- CN106918197A CN106918197A CN201710141275.0A CN201710141275A CN106918197A CN 106918197 A CN106918197 A CN 106918197A CN 201710141275 A CN201710141275 A CN 201710141275A CN 106918197 A CN106918197 A CN 106918197A
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- CN
- China
- Prior art keywords
- pipeline
- exchanger
- bog
- cool
- heat
- 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
- 238000009434 installation Methods 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 238000005057 refrigeration Methods 0.000 claims abstract description 11
- 239000007791 liquid phase Substances 0.000 claims abstract description 8
- 238000002309 gasification Methods 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000007792 gaseous phase Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004781 supercooling Methods 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
- F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
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
Reliquefaction installation is reclaimed the invention discloses a kind of BOG, including BOG air inlet buffer units, BOG air inlets buffer unit connects the intensification entrance of cool-heat-exchanger by the first pipeline, check valve is connected by the direction of air inlet buffer unit to cool-heat-exchanger on the first pipeline, the intensification outlet of cool-heat-exchanger connects compressor by second pipe, compressor connects the refrigeration entrance of cool-heat-exchanger by the 3rd pipeline, the refrigeration outlet of cool-heat-exchanger connects the deep cooling entrance of deep-cooling heat exchanger by the 4th pipeline, the deep cooling outlet of deep-cooling heat exchanger connects gas-liquid separator by the 5th pipeline, the liquid-phase outlet of gas-liquid separator connects the liquid phase entrance of LNG storage tank by the 6th pipeline, Liquid level adjusting valve is provided with the 6th pipeline, Liquid level adjusting valve connects gas-liquid separator by corresponding liquid level pipe control.Advantages of the present invention：Present apparatus science, economically treatment utilize BOG, it is to avoid, to airborne release, equipment being capable of energy-saving, long-term safety reliability service for BOG.
Description
Technical field
Reliquefaction installation is reclaimed the present invention relates to the recovery technology field of BOG, more particularly to a kind of BOG.
Background technology
BOG is Boil Off Gas, refers to cryogenic liquid, such as LNG（-162℃）, low temperature propane（- 40~-42 DEG C）, it is low
Temperature alkane（0~-2 DEG C）Deng the gas volatilized after absorption external heat in storage tank.With the increasing of volatilization gas in storage tank
Many, tank inner pressure constantly rises, to maintain pressure of storage tank in allowed limits, it is necessary to release to protect storage tank safety.But
If BOG is directly discharged in air, it is considerable to cause the wasting of resources；40 tons of a sale daily according to statistics
The liquid filling station of LNG, discharge BOG amounts are 280-340kg, lose the amount of money up to 3300-4100 units within one day, and the loss of a year then reaches
Over one hundred ten thousand, waste quite surprising；And its greenhouse effect is then 21 times of carbon dioxide, the pollution of surrounding environment is more serious.Reclaim
Process the method for BOG have directly compression feeding gas line network, return benefit vacuum, thermal insulation layer filled instead of nitrogen and re-liquefied etc. several
Kind.
Directly this method energy consumption of compression feeding gas line network is big, is influenceed larger by downstream gas consumption, and adaptability is not strong,
And a large amount of cold energy entrained by BOG are consumed in the compression process of compressor, are not utilized, and cause waste.
Returning benefit this method of vacuum can only to a certain extent reclaim BOG, there is the shortcomings of reclaiming not thorough.
Consumption instead of nitrogen filling this method of thermal insulation layer is smaller for large-scale storage tank day BOG is measured, it is impossible to have
The discharge of the solution BOG of effect.
Re-liquefied this method is after BOG is drawn, by compressor boost, and then to be cooled down by after-condenser, by BOG weights
Pipe network is sent into new liquefaction after returning to storage tank or gasification for LNG outer defeated.But use this side for medium and small LNG liquid addition station
Formula processes BOG, and its technical sophistication, cost are of a relatively high, and popularization uses not too much reality.
The content of the invention
The invention aims to solve shortcoming present in prior art, and a kind of BOG for proposing reclaims re-liquefied
Device.
To achieve these goals, present invention employs following technical scheme：
A kind of BOG reclaims reliquefaction installation, it is characterised in that：Including BOG air inlet buffer units, BOG air inlet buffer units pass through
First pipeline connects the intensification entrance of cool-heat-exchanger, by the direction of air inlet buffer unit to cool-heat-exchanger on the first pipeline
Connection check valve, the intensification outlet of cool-heat-exchanger connects compressor by second pipe, and compressor is connected by the 3rd pipeline
The refrigeration entrance of cool-heat-exchanger, the refrigeration outlet of cool-heat-exchanger is entered by the deep cooling that the 4th pipeline connects deep-cooling heat exchanger
Mouthful, the outlet of the deep cooling of deep-cooling heat exchanger connects gas-liquid separator by the 5th pipeline, and the liquid-phase outlet of gas-liquid separator is by the
Six pipelines connect the liquid phase entrance of LNG storage tank, and Liquid level adjusting valve is provided with the 6th pipeline, and Liquid level adjusting valve passes through corresponding liquid
Position pipe control connection gas-liquid separator；
The gaseous phase outlet of the gas-liquid separator connects the 7th pipeline one end, the 7th pipeline other end be connected to check valve with it is cold and hot
On the first pipeline between exchanger, pressure-regulating valve is additionally provided with the 7th pipeline；
5th pipeline and the 6th pipeline connect temperature control valve (TCV) by corresponding temperature control pipeline, and temperature control valve (TCV) is by the
Eight pipelines connect the gasification entrance of the deep-cooling heat exchanger, and the gasification outlet of deep-cooling heat exchanger passes through the 9th pipeline and described second
Pipeline is connected.
Preferably, the compressor is BOG three-stage blowers.
Preferably, the cool-heat-exchanger is aluminum plate fin heat exchanger.
Preferably, the deep-cooling heat exchanger is refrigeration gasification all-in-one.
The advantage of the invention is that：Present apparatus science, economically treatment utilize BOG, it is to avoid BOG is to airborne release, equipment
Can energy-saving, long-term safety reliability service, the present apparatus also has simple structure, the features such as be easily achieved, and equipment investment is few,
Cost can be effectively reduced, while energy consumption can be effectively reduced, is increased economic efficiency, using three-stage blower, by three
Second compression freezes, it is ensured that the safe and reliable long-term operation of cryogenic compressor, realizes the ladder condensation supercooling of BOG.
Brief description of the drawings
Fig. 1 is the basic structure schematic diagram that a kind of BOG provided by the present invention reclaims reliquefaction installation.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 1, a kind of BOG that the present invention is provided reclaims reliquefaction installation, it is characterised in that：It is slow including BOG air inlets
Flushing device 1, the BOG that LNG tank cars or storage tank are produced is delivered in BOG air inlets buffer unit 1, and BOG air inlets buffer unit 1 leads to
The intensification entrance that the first pipeline 21 connects cool-heat-exchanger 2 is crossed, by air inlet buffer unit 1 to cold and hot exchange on the first pipeline 21
The direction connection check valve 7 of device 2.Cool-heat-exchanger 2 is aluminum plate fin heat exchanger, is preheated BOG by cool-heat-exchanger 2.
The intensification outlet of cool-heat-exchanger 2 connects compressor 3 by second pipe 22, and compressor 3 is BOG three stage compressions
Machine.Carry out three stage compression and cool down by the BOG after 3 pairs of preheatings of compressor.
Compressor 3 connects the refrigeration entrance of cool-heat-exchanger 2 by the 3rd pipeline 23.By 2 pairs of compressions of cool-heat-exchanger
BOG afterwards carries out precooling treatment.
The refrigeration outlet of cool-heat-exchanger 2 connects the deep cooling entrance of deep-cooling heat exchanger 4 by the 4th pipeline 24.By deep cooling
4 couples of BOG through overcompression precooling of heat exchanger carry out multiple cryogenic liquefying treatment.
The deep cooling outlet of deep-cooling heat exchanger 4 connects gas-liquid separator 5, the liquid phase of gas-liquid separator 5 by the 5th pipeline 25
Outlet connects the liquid phase entrance of LNG storage tank 6 by the 6th pipeline 26.Liquid level adjusting valve 10, liquid level are provided with the 6th pipeline 26
Regulating valve 10 controls connection gas-liquid separator 5 by corresponding liquid level pipeline 15.When the liquid level in gas-liquid separator 5 is higher than setting
During the value upper limit, Liquid level adjusting valve 10 is automatically opened up, and LNG storage tank 6 is transported to by LNG is put in LNG gas-liquid separators 5；Work as gas-liquid separation
When liquid level in device 5 is less than setting value lower limit, Liquid level adjusting valve 10 is automatically switched off.
Gaseous phase outlet connection the 7th pipeline 27 one end of the gas-liquid separator 5, the other end of the 7th pipeline 27 is connected to list
To on the first pipeline 21 between valve 7 and cool-heat-exchanger 2, pressure-regulating valve 8 is additionally provided with the 7th pipeline 27.Gas-liquid separation
Gas in device 5 is recycled again after cool-heat-exchanger 2 is preheated.
5th pipeline 25 and the 6th pipeline 26 connect temperature control valve (TCV) 9, temperature by corresponding temperature control pipeline 16
Regulating valve 9 connects the gasification entrance of the deep-cooling heat exchanger 4 by the 8th pipeline 28.Deep-cooling heat exchanger 4 is refrigeration gasification one
Machine.The gasification outlet of deep-cooling heat exchanger 4 is connected by the 9th pipeline 29 with the second pipe 22.When the 5th pipeline 25 and
When temperature in six pipelines 26 is higher than 9 setting value of temperature control valve (TCV), the LNG in the 5th pipeline 25 and the 6th pipeline 26 can be through deep cooling
The gasification Posterior circle of heat exchanger 4 is utilized.
Claims (4)
1. a kind of BOG reclaims reliquefaction installation, it is characterised in that：Including BOG air inlet buffer units（1）, BOG air inlet buffer units
（1）By the first pipeline（21）Connection cool-heat-exchanger（2）Intensification entrance, in the first pipeline（21）On by air inlet buffer unit
（1）To cool-heat-exchanger（2）Direction connection check valve（7）, cool-heat-exchanger（2）Intensification outlet pass through second pipe（22）
Connection compressor（3）, compressor（3）By the 3rd pipeline（23）Connection cool-heat-exchanger（2）Refrigeration entrance, cool-heat-exchanger
（2）Refrigeration outlet pass through the 4th pipeline（24）Connection deep-cooling heat exchanger（4）Deep cooling entrance, deep-cooling heat exchanger（4）Deep cooling
Outlet passes through the 5th pipeline（25）Connection gas-liquid separator（5）, gas-liquid separator（5）Liquid-phase outlet pass through the 6th pipeline（26）
Connection LNG storage tank（6）Liquid phase entrance, in the 6th pipeline（26）It is provided with Liquid level adjusting valve（10）, Liquid level adjusting valve（10）It is logical
Cross corresponding liquid level pipeline（15）Control connection gas-liquid separator（5）；
The gas-liquid separator（5）Gaseous phase outlet connect the 7th pipeline（27）One end, the 7th pipeline（27）The other end is connected to
Check valve（7）With cool-heat-exchanger（2）Between the first pipeline（21）On, in the 7th pipeline（27）On be additionally provided with pressure-regulating valve
（8）；
5th pipeline（25）With the 6th pipeline（26）Pass through corresponding temperature control pipeline（16）Connection temperature control valve (TCV)（9）,
Temperature control valve (TCV)（9）By the 8th pipeline（28）Connect the deep-cooling heat exchanger（4）Gasification entrance, deep-cooling heat exchanger（4）'s
Gasification outlet passes through the 9th pipeline（29）With the second pipe（22）It is connected.
2. a kind of BOG according to claim 1 reclaims reliquefaction installation, it is characterised in that：The compressor（3）It is BOG
Three-stage blower.
3. a kind of BOG according to claim 1 reclaims reliquefaction installation, it is characterised in that：The cool-heat-exchanger（2）For
Aluminum plate fin heat exchanger.
4. a kind of BOG according to claim 1 reclaims reliquefaction installation, it is characterised in that：The deep-cooling heat exchanger（4）For
Refrigeration gasification all-in-one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710141275.0A CN106918197A (en) | 2017-03-10 | 2017-03-10 | A kind of BOG reclaims reliquefaction installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710141275.0A CN106918197A (en) | 2017-03-10 | 2017-03-10 | A kind of BOG reclaims reliquefaction installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106918197A true CN106918197A (en) | 2017-07-04 |
Family
ID=59461749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710141275.0A Pending CN106918197A (en) | 2017-03-10 | 2017-03-10 | A kind of BOG reclaims reliquefaction installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106918197A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715166A (en) * | 2019-10-11 | 2020-01-21 | 郑志 | BOG (boil off gas) recovery system of LNG (liquefied natural gas) tank container |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881549A (en) * | 2010-06-25 | 2010-11-10 | 华南理工大学 | Re-condensation reclaiming system for evaporated gas of liquefied natural gas receiving station and reclaiming method thereof |
| CN202361752U (en) * | 2011-12-16 | 2012-08-01 | 重庆耐德能源装备集成有限公司 | Recovery system of BOG (boil-off gas) in liquefied natural gas mixed refrigerating technologies |
| CN104792114A (en) * | 2015-04-10 | 2015-07-22 | 四川金科深冷设备工程有限公司 | BOG re-liquefaction process and re-liquefaction recovery system thereof |
| CN105318190A (en) * | 2014-08-05 | 2016-02-10 | 安瑞科(廊坊)能源装备集成有限公司 | Boil off gas (BOG) liquefaction recovery system and method |
| CN205090722U (en) * | 2015-10-26 | 2016-03-16 | 成都华气厚普机电设备股份有限公司 | Marine BOG of LNG is liquefying plant again |
| CN205156507U (en) * | 2015-11-23 | 2016-04-13 | 重庆耐德工业股份有限公司 | BOG is equipment of liquefying again |
| CN205262057U (en) * | 2015-10-23 | 2016-05-25 | 中国空分设备有限公司 | Adopt BOG self compression inflation liquefaction BOG's reliquefaction system |
-
2017
- 2017-03-10 CN CN201710141275.0A patent/CN106918197A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881549A (en) * | 2010-06-25 | 2010-11-10 | 华南理工大学 | Re-condensation reclaiming system for evaporated gas of liquefied natural gas receiving station and reclaiming method thereof |
| CN202361752U (en) * | 2011-12-16 | 2012-08-01 | 重庆耐德能源装备集成有限公司 | Recovery system of BOG (boil-off gas) in liquefied natural gas mixed refrigerating technologies |
| CN105318190A (en) * | 2014-08-05 | 2016-02-10 | 安瑞科(廊坊)能源装备集成有限公司 | Boil off gas (BOG) liquefaction recovery system and method |
| CN104792114A (en) * | 2015-04-10 | 2015-07-22 | 四川金科深冷设备工程有限公司 | BOG re-liquefaction process and re-liquefaction recovery system thereof |
| CN205262057U (en) * | 2015-10-23 | 2016-05-25 | 中国空分设备有限公司 | Adopt BOG self compression inflation liquefaction BOG's reliquefaction system |
| CN205090722U (en) * | 2015-10-26 | 2016-03-16 | 成都华气厚普机电设备股份有限公司 | Marine BOG of LNG is liquefying plant again |
| CN205156507U (en) * | 2015-11-23 | 2016-04-13 | 重庆耐德工业股份有限公司 | BOG is equipment of liquefying again |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715166A (en) * | 2019-10-11 | 2020-01-21 | 郑志 | BOG (boil off gas) recovery system of LNG (liquefied natural gas) tank container |
| CN110715166B (en) * | 2019-10-11 | 2021-07-13 | 郑志 | BOG (boil off gas) recovery system of LNG (liquefied natural gas) tank container |
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Application publication date: 20170704 |