CN203979877U - A kind of LNG receiving station reclaims cold for the treatment of the device of BOG - Google Patents
A kind of LNG receiving station reclaims cold for the treatment of the device of BOG Download PDFInfo
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- CN203979877U CN203979877U CN201420348560.1U CN201420348560U CN203979877U CN 203979877 U CN203979877 U CN 203979877U CN 201420348560 U CN201420348560 U CN 201420348560U CN 203979877 U CN203979877 U CN 203979877U
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- lng
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- pump
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- 238000011282 treatment Methods 0.000 title claims abstract description 19
- 239000006200 vaporizer Substances 0.000 claims abstract description 33
- 239000007792 gaseous phase Substances 0.000 claims abstract description 12
- 239000007791 liquid phase Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003949 liquefied natural gas Substances 0.000 description 114
- 238000009833 condensation Methods 0.000 description 9
- 230000005494 condensation Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 238000002309 gasification Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model discloses a kind of LNG receiving station and reclaim cold for the treatment of the device of BOG, belong to the BOG of LNG receiving station process field, a gaseous phase outlet pipeline of the LNG storage tank of this device is communicated with at least one low pressure BOG compressor, the outlet line of low pressure BOG compressor is communicated with LNG/BOG heat exchanger, a gaseous phase outlet pipeline of LNG/BOG heat exchanger is communicated with BOG after-condenser, the outlet line of BOG after-condenser bottom is communicated with at least one high pressure LNG pump, high pressure LNG delivery side of pump pipeline is communicated with vaporizer, and the outlet line of vaporizer is communicated with pipe network; Another liquid-phase outlet pipeline of LNG storage tank is communicated with BOG after-condenser, high pressure LNG pump respectively, and this pipeline is communicated with the low pressure LNG pump in LNG storage tank.The features such as the utlity model has reasonable in designly, simple in structure, easy to process, cost of production is low, and load adjustable extent is large.
Description
Technical field
The utility model relates to the BOG of LNG receiving station process field, and specifically LNG receiving station reclaims cold for the treatment of the device of BOG.
Background technique
LNG (Liquefied Natural Gas) is the abbreviation of LNG Liquefied natural gas, and it takes full advantage of rock gas at normal pressure and-162
ounder C, after liquefaction, 1/600 this character when volume can narrow down to gaseous state, carries new approach is provided for High-efficiency Gas, has also expanded the application of rock gas.According to national energy planning, the ratio of rock gas in energy-consuming rises year by year, expects 10% left and right of the whole energy resource structure in the year two thousand twenty station.
LNG belongs to super-low liquid, although storage tank has good cold insulation thermal-insulation function when storing, still unavoidably has heat to import in tank, cause that LNG evaporation forms BOG (boil-off gas), this part BOG needs to process in time, otherwise can cause storage tank superpressure, causes emptying to torch.Current domestic treatments B OG is mainly condensation again and compression is directly outer defeated, and because BOG production is unstable, and it is little to compare with downstream use gas demand, so seldom adopt the directly outer defeated processing mode of compression.Conventionally the BOG that adopts again condensing mode process to produce, traditional recondensation process: the cold low pressure LNG that pressurize mixes in after-condenser with the BOG of compressor discharge, reaches the object of condensation BOG.The liquid phase of condensation afterwards is directly delivered to high pressure LNG pump pressurization, transports to pipe network outside after vaporizer gasification.
In LNG receiving station technique, high pressure LNG was still ultralow temperature fluid (～-145 before entering vaporizer
oc), this cold quality is higher, directly enters vaporizer and is caused energy waste by re-heat (thermal source is seawater or fuel combustion) gasification.
In traditional B OG condensation process, need a large amount of low pressure to cross cold LNG as low-temperature receiver, the cold in conjunction with containing before high pressure LNG gasification, therefore for to reach energy-saving and cost-reducing object, need to effectively utilize the cold of wasting in tratitional technology.
Summary of the invention
Technical assignment of the present utility model is to provide LNG receiving station and reclaims cold for the treatment of the device of BOG.
Technical assignment of the present utility model is realized in the following manner, GaiLNG receiving station recovery cold comprises LNG storage tank for the treatment of the device of BOG, low pressure BOG compressor, LNG/BOG heat exchanger, BOG after-condenser and vaporizer, a gaseous phase outlet pipeline of LNG storage tank is communicated with at least one low pressure BOG compressor, the outlet line of low pressure BOG compressor is communicated with LNG/BOG heat exchanger, a gaseous phase outlet pipeline of LNG/BOG heat exchanger is communicated with BOG after-condenser, the outlet line of BOG after-condenser bottom is communicated with at least one high pressure LNG pump, high pressure LNG delivery side of pump pipeline is communicated with vaporizer, the outlet line of vaporizer is communicated with pipe network, another liquid-phase outlet pipeline of LNG storage tank is communicated with BOG after-condenser, high pressure LNG pump respectively, and this pipeline is communicated with the low pressure LNG pump in LNG storage tank.
Described low pressure BOG compressor is installed when two or more, is installed in parallel on connecting line.
Described high pressure LNG pump is installed when two or more, is installed in parallel on connecting line.
On described high pressure LNG delivery side of pump pipeline, be provided with a side pipe line that is communicated with LNG/BOG heat exchanger, another outlet line of LNG/BOG heat exchanger is communicated with vaporizer.
On the side pipe line that described high pressure LNG pump is communicated with LNG/BOG heat exchanger, be provided with modulating valve one.
On the outlet line that described high pressure LNG pump is communicated with vaporizer, be provided with modulating valve two.
For the treatment of the device of BOG compared to the prior art LNG of the present utility model receiving station reclaims cold, reduced after-condenser machine utilization with and size, reclaiming the cooled BOG temperature of cold is-120
oc, under certain gas speed, the tower diameter of after-condenser can reduce, and saves equipment cost; And in the situation of LNG receiving station limit minimum outer defeated (the outer Movement Capabilities of 30% high pressure LNG pump), the BOG that all condensation produces; Effectively reduce the energy consumption of traditional B OG condensation process, reduced enterprise's cost of production.
Accompanying drawing explanation
Accompanying drawing 1 is that a kind of LNG receiving station reclaims cold for the treatment of the linkage structure schematic diagram of BOG device.
Accompanying drawing 2 is that a kind of LNG receiving station reclaims cold and implements view for the treatment of the another kind of BOG device.
In figure: 1, LNG storage tank, 2, low pressure BOG compressor, 3, LNG/BOG heat exchanger, 4, BOG after-condenser, 5, high pressure LNG pump, 6, modulating valve one, 7, modulating valve two, 8, vaporizer, 9, pipe network, 10, low pressure LNG pump.
Embodiment
Embodiment 1:
Adopting low pressure BOG compressor 2 separate unit treating capacities is 10 t/h, and high pressure LNG pump 5 rated flows are 180 t/h, and equipment limit minimum discharge is 54 t/h, 1 low pressure BOG compressor 2 operation.
GaiLNG receiving station recovery cold comprises LNG storage tank 1 for the treatment of the device of BOG, low pressure BOG compressor 2, LNG/BOG heat exchanger 3, BOG after-condenser 4 and vaporizer 8, a gaseous phase outlet pipeline of LNG storage tank 1 is communicated with low pressure BOG compressor 2, the outlet line of low pressure BOG compressor 2 is communicated with LNG/BOG heat exchanger 3, a gaseous phase outlet pipeline of LNG/BOG heat exchanger 3 is communicated with BOG after-condenser 4, the outlet line of BOG after-condenser 4 bottoms is communicated with high pressure LNG pump 5, the outlet line of high pressure LNG pump 5 is communicated with vaporizer 8, on the outlet line that high pressure LNG pump 5 is communicated with vaporizer 8, be provided with modulating valve 27, the outlet line of vaporizer 8 is communicated with pipe network 9, another liquid-phase outlet pipeline of LNG storage tank 1 is communicated with BOG after-condenser 4, high pressure LNG pump 5 respectively, and this pipeline is communicated with the low pressure LNG pump 10 in LNG storage tank 1, on the outlet line of high pressure LNG pump 5, be provided with a side pipe line that is communicated with LNG/BOG heat exchanger 3, another outlet line of LNG/BOG heat exchanger 3 is communicated with vaporizer 8, on the side pipe line that high pressure LNG pump 5 is communicated with LNG/BOG heat exchanger 3, be provided with modulating valve 1.
Embodiment 2:
Adopting low pressure BOG compressor 2 separate unit treating capacities is 10 t/h, and high pressure LNG pump 5 rated flows are 180 t/h, and equipment limit minimum discharge is 54 t/h, and two low pressure BOG compressors 2 in parallel and two high pressure LNG pumps 5 in parallel move simultaneously.
GaiLNG receiving station recovery cold comprises LNG storage tank 1 for the treatment of the device of BOG, low pressure BOG compressor 2, LNG/BOG heat exchanger 3, BOG after-condenser 4 and vaporizer 8, a gaseous phase outlet pipeline low pressure BOG compressor 2 in parallel with two of LNG storage tank 1 is communicated with, the outlet line of two low pressure BOG compressors 2 in parallel is communicated with LNG/BOG heat exchanger 3, a gaseous phase outlet pipeline of LNG/BOG heat exchanger 3 is communicated with BOG after-condenser 4, the outlet line of the BOG after-condenser 4 bottoms high pressure LNG pump 5 in parallel with two is communicated with, the outlet line of two high pressure LNG pumps 5 in parallel is communicated with vaporizer 8, on the outlet line that high pressure LNG pump 5 is communicated with vaporizer 8, be provided with modulating valve 27, the outlet line of vaporizer 8 is communicated with pipe network 9, another liquid-phase outlet pipeline of LNG storage tank 1 is communicated with BOG after-condenser 4, high pressure LNG pump 5 respectively, and this pipeline is communicated with the low pressure LNG pump 10 in LNG storage tank 1, on the outlet line of two high pressure LNG pumps 5 in parallel, be provided with a side pipe line that is communicated with LNG/BOG heat exchanger 3, another outlet line of LNG/BOG heat exchanger 3 is communicated with vaporizer 8, on the side pipe line that high pressure LNG pump 5 is communicated with LNG/BOG heat exchanger 3, be provided with modulating valve 1.
Embodiment 3:
Adopting low pressure BOG compressor 2 separate unit treating capacities is 10 t/h, and high pressure LNG pump 5 rated flows are 180 t/h, and equipment limit minimum discharge is 54 t/h, and three low pressure BOG compressors 2 in parallel and three high pressure LNG pumps 5 in parallel move simultaneously.
GaiLNG receiving station recovery cold comprises LNG storage tank 1 for the treatment of the device of BOG, low pressure BOG compressor 2, LNG/BOG heat exchanger 3, BOG after-condenser 4 and vaporizer 8, a gaseous phase outlet pipeline of LNG storage tank 1 in parallel with three low pressure BOG compressor 2 be communicated with, the outlet line of three low pressure BOG compressors 2 in parallel is communicated with LNG/BOG heat exchanger 3, a gaseous phase outlet pipeline of LNG/BOG heat exchanger 3 is communicated with BOG after-condenser 4, the outlet line of BOG after-condenser 4 bottoms in parallel with three high pressure LNG pump 5 be communicated with, the outlet line of three high pressure LNG pumps 5 in parallel is communicated with vaporizer 8, on the outlet line that high pressure LNG pump 5 is communicated with vaporizer 8, be provided with modulating valve 27, the outlet line of vaporizer 8 is communicated with pipe network 9, another liquid-phase outlet pipeline of LNG storage tank 1 is communicated with BOG after-condenser 4, high pressure LNG pump 5 respectively, and this pipeline is communicated with the low pressure LNG pump 10 in LNG storage tank 1, on the outlet line of three high pressure LNG pumps 5 in parallel, be provided with a side pipe line that is communicated with LNG/BOG heat exchanger 3, another outlet line of LNG/BOG heat exchanger 3 is communicated with vaporizer 8, on the side pipe line that high pressure LNG pump 5 is communicated with LNG/BOG heat exchanger 3, be provided with modulating valve 1.
The process step of said apparatus is as follows:
From LNG storage tank 1 temperature, be-145
othe BOG10t/h of C enters low pressure BOG compressor 2, is pressurized to 0.75 MPaG, outlet temperature 1
oc, enters LNG/BOG heat exchanger 3 afterwards; In 5 outlets of high pressure LNG pump, draw a side line, and modulating valve 1 is set, control LNG flow, enter LNG/BOG heat exchanger 3 and carry out heat exchange with the BOG of low pressure BOG compressor 2 outlets; The BOG of low pressure BOG compressor 2 outlets, after LNG/BOG heat exchanger 3, is cooled to-120
oc, 0.75 MPaG, the cold LNG45t/h of mistake that BOG enters 10 outlets of BOG after-condenser 4 and low pressure LNG pump afterwards mixes, reaches the be condensed object of processing of BOG; Condensed LNG 54 t/h enter high pressure LNG pump 5, are forced into after required pressure 9.6 MPaG of pipe network 9, enter LNG vaporizer 8 and carry out gasification process, then the outer pipe network 9 of transporting to; From LNG storage tank 1 temperature, be-145
othe high pressure LNG of C, after 3 heat exchange of LNG/BOG heat exchanger, is preheated to-112
oc, converges and enters LNG vaporizer 8 and carry out gasification process with above-mentioned gas afterwards, the outer pipe network 9 of transporting to after gasification.
In whole process, the required ratio of total condensation BOG is: LNG/BOG=4.5, and far below traditional B OG condensation ratio 8.Outside limit minimum, under defeated operating mode, reach the object of total condensation BOG.
Claims (6)
1.Yi Zhong LNG receiving station reclaims cold for the treatment of the device of BOG, it is characterized in that, this device comprises LNG storage tank, low pressure BOG compressor, LNG/BOG heat exchanger, BOG after-condenser and vaporizer, a gaseous phase outlet pipeline of LNG storage tank is communicated with at least one low pressure BOG compressor, the outlet line of low pressure BOG compressor is communicated with LNG/BOG heat exchanger, a gaseous phase outlet pipeline of LNG/BOG heat exchanger is communicated with BOG after-condenser, the outlet line of BOG after-condenser bottom is communicated with at least one high pressure LNG pump, high pressure LNG delivery side of pump pipeline is communicated with vaporizer, the outlet line of vaporizer is communicated with pipe network, another liquid-phase outlet pipeline of LNG storage tank is communicated with BOG after-condenser, high pressure LNG pump respectively, and this pipeline is communicated with the low pressure LNG pump in LNG storage tank.
2. LNG according to claim 1 receiving station reclaims cold for the treatment of the device of BOG, it is characterized in that, described low pressure BOG compressor is installed when two or more, is installed in parallel on connecting line.
3. LNG according to claim 1 receiving station reclaims cold for the treatment of the device of BOG, it is characterized in that, described high pressure LNG pump is installed when two or more, is installed in parallel on connecting line.
4. LNG according to claim 1 receiving station reclaims cold for the treatment of the device of BOG, it is characterized in that, on described high pressure LNG delivery side of pump pipeline, be provided with a side pipe line that is communicated with LNG/BOG heat exchanger, another outlet line of LNG/BOG heat exchanger is communicated with vaporizer.
5. LNG according to claim 4 receiving station reclaims cold for the treatment of the device of BOG, it is characterized in that, on the side pipe line that described high pressure LNG pump is communicated with LNG/BOG heat exchanger, is provided with modulating valve one.
6. LNG according to claim 1 receiving station reclaims cold for the treatment of the device of BOG, it is characterized in that, on the outlet line that described high pressure LNG pump is communicated with vaporizer, is provided with modulating valve two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420348560.1U CN203979877U (en) | 2014-06-27 | 2014-06-27 | A kind of LNG receiving station reclaims cold for the treatment of the device of BOG |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420348560.1U CN203979877U (en) | 2014-06-27 | 2014-06-27 | A kind of LNG receiving station reclaims cold for the treatment of the device of BOG |
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| Publication Number | Publication Date |
|---|---|
| CN203979877U true CN203979877U (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420348560.1U Expired - Lifetime CN203979877U (en) | 2014-06-27 | 2014-06-27 | A kind of LNG receiving station reclaims cold for the treatment of the device of BOG |
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| Country | Link |
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| CN (1) | CN203979877U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033727A (en) * | 2014-06-27 | 2014-09-10 | 中国海洋石油总公司 | Technique and device for treating BOG by using recycled cold energy at LNG receiving station |
| CN104595710A (en) * | 2015-01-21 | 2015-05-06 | 中冶东方工程技术有限公司 | Recovery system and method of residual liquid of liquefied natural gas |
-
2014
- 2014-06-27 CN CN201420348560.1U patent/CN203979877U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033727A (en) * | 2014-06-27 | 2014-09-10 | 中国海洋石油总公司 | Technique and device for treating BOG by using recycled cold energy at LNG receiving station |
| CN104595710A (en) * | 2015-01-21 | 2015-05-06 | 中冶东方工程技术有限公司 | Recovery system and method of residual liquid of liquefied natural gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 100010 Beijing City, Dongcheng District Chaoyangmen No. 25 North Street CNOOC building Co-patentee after: CNOOC OIL & PETROCHEMICALS Co.,Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Co-patentee after: CNOOC PETROCHEMICAL ENGINEERING Co.,Ltd. Address before: 100010 Beijing City, Dongcheng District Chaoyangmen North Street, No. 25 building, Chinese CNOOC Offshore Oil Corporation, the Ministry of science and technology Co-patentee before: CNOOC OIL & PETROCHEMICALS Co.,Ltd. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Co-patentee before: CNOOC SHANDONG CHEMICAL ENGINEERING CO.,LTD. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141203 |
|
| CX01 | Expiry of patent term |