CN204477679U - A kind of LNG warehouse BOG recycling system - Google Patents
A kind of LNG warehouse BOG recycling system Download PDFInfo
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- CN204477679U CN204477679U CN201520071257.6U CN201520071257U CN204477679U CN 204477679 U CN204477679 U CN 204477679U CN 201520071257 U CN201520071257 U CN 201520071257U CN 204477679 U CN204477679 U CN 204477679U
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Abstract
The utility model discloses a kind of LNG warehouse BOG recycling system, comprise LNG storage tank connected successively, the air-heating type gasifier for being heated up by BOG, the first compressor being used for the BOG supercharging after heating up to air-heating type gasifier and be used for BOG liquefaction the heat exchanger being LNG, the LNG of post liquefaction recycles through the first outlet feeding LNG storage tank of heat exchanger; BOG recycling system of the present utility model, is coordinated by rational equipment, is made full use of by the BOG of recovery, avoids BOG emptying to cause the waste of environmental pollution and resource, does not need additionally to build BOG comprehensive utilization station outside storehouse simultaneously, more economic and practical.
Description
Technical field
The utility model belongs to BOG recovery technology field, is specifically related to a kind of LNG warehouse BOG recycling system.
Background technique
BOG and Boil Off Gas, refers to the gas volatilized after cryogenic liquide (as LNG, low temperature propane etc.) absorbs external heat in storage tank.Present Domestic is in the LNG warehouse period of building energetically, and the LNG warehouse reserves for strategic reserves and city peak regulation are huge, but incident be a large amount of evaporations of BOG.If LNG turnover is than very fast; effectively can avoid the situation of stocking system pressure release emptying; if LNG turnover is slow or due to relative evaporation excessive; the speed of pressure increase is greater than the speed of LNG turnover; the situation that BOG is excessive will be produced; excessive BOG is released in air, in energy-saving and emission-reduction, environmental protection, safety etc., all there is numerous drawback.
Less for the research of the BOG recoverying and utilizing method of LNG warehouse at present.Existing LNG warehouse BOG recovery method builds BOG comprehensive utilization station outside storehouse, and by BOG centralized recovery through flow processs such as superchargings, final supply CNG automobile uses.Although the method controls the amount of diffusing of BOG and meets environmental requirement, require to build storehouse land used abundant, inapplicable for some middle-size and small-size LNG emergency stock storehouses.
Model utility content
The purpose of this utility model solves the problem, and provides a kind of can directly recovery by the BOG in LNG storage tank liquefy and be recycled into the LNG warehouse BOG recycling system in LNG storage tank.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of LNG warehouse BOG recycling system, comprise LNG storage tank connected successively, the air-heating type gasifier for being heated up by BOG, the first compressor being used for the BOG supercharging after heating up to air-heating type gasifier and be used for BOG liquefaction the heat exchanger being LNG, the LNG of post liquefaction recycles through the first outlet feeding LNG storage tank of heat exchanger.
Preferably, also comprise for the second compressor of mix refrigerant supercharging and the condenser for cooling and mixing refrigeration agent, mix refrigerant is fed back to the second compressor successively after the second compressor and condenser enter heat exchanger and BOG carries out heat exchange.
Preferably, described heat exchanger is provided with the second import, the second outlet, triple feed inlet and the 3rd outlet, and the second import is connected with the outlet of condenser, and the 3rd outlet is connected with the second compressor, the outlet of the second compressor is connected with condenser, and the second outlet is connected with triple feed inlet.
Preferably, second throttle is provided with between described second outlet and triple feed inlet.
Preferably, first throttle valve is provided with between described first outlet and LNG storage tank.
Preferably, described heat exchanger is provided with the first import, and the outlet of the first compressor is connected with the first import.
The beneficial effects of the utility model are: BOG recycling system provided by the utility model, BOG in LNG storage tank is warming up to normal temperature through air-heating type gasifier, the BOG of normal temperature enters the first compressor boost, sending into liquefaction in heat exchanger is subsequently LNG, the LNG of post liquefaction is again through first throttle valve reducing pressure by regulating flow, last re-injection in LNG storage tank, the mix refrigerant constantly circulated by the second compressor and condenser for heat exchanger liquefaction BOG cold is provided; This BOG recycling system is coordinated by rational equipment, is made full use of by the BOG of recovery, avoids BOG emptying to cause the waste of environmental pollution and resource, does not need additionally to build BOG comprehensive utilization station outside storehouse simultaneously, more economic and practical.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model LNG warehouse BOG recycling system.
Description of reference numerals: 1, LNG storage tank; 2, air-heating type gasifier; 3, the first compressor; 4, the first import; 5, the first outlet; 6, first throttle valve; 7, the second import; 8, the second outlet; 9, triple feed inlet; 10, the 3rd outlet; 11, the second compressor; 12, condenser; 13, second throttle.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further:
As shown in Figure 1, LNG warehouse BOG recycling system of the present utility model, comprise LNG storage tank 1, air-heating type gasifier 2, first compressor 3 and heat exchanger, heat exchanger is provided with the first import 4, first outlet 5, second import 7, second outlet 8, triple feed inlet 9 and the 3rd outlet 10, the gaseous phase outlet of LNG storage tank 1 is connected with the import of air-heating type gasifier 2, the import of the first compressor 3 is connected with the outlet of air-heating type gasifier 2, first import 4 of heat exchanger is connected with the outlet of the first compressor 3, first outlet 5 of heat exchanger is connected with LNG storage tank 1, wherein, air-heating type gasifier 2 is for heating up BOG, first compressor 3 is for making BOG become pressurized gas to the BOG supercharging after air-heating type gasifier 2 intensification, heat exchanger is used for being liquefied by high pressure BOG as LNG, the LNG of post liquefaction recycles through the first outlet 5 feeding LNG storage tank 1 of heat exchanger, be provided with first throttle valve 6 between first outlet 5 and LNG storage tank 1, first throttle valve 6 is for the LNG reducing pressure by regulating flow fed back in LNG storage tank 1.
BOG recycling system of the present invention also comprises the second compressor 11 and condenser 12, second import 7 of heat exchanger is connected with the outlet of condenser 12,3rd outlet 10 of heat exchanger is connected with the import of the second compressor 11, the outlet of the second compressor 11 is connected with the import of condenser 12, second compressor 11 is for mix refrigerant supercharging, and condenser 12 is for being cooled to normal temperature high voltage state by mix refrigerant; Second outlet of heat exchanger 8 is connected with triple feed inlet 9, and second exports between 8 and triple feed inlet 9 and be provided with second throttle 13, and second throttle 13 is for mix refrigerant reducing pressure by regulating flow; Mix refrigerant is fed back to the second compressor 11 successively and constantly circulates after the second compressor 11 and condenser 12 enter heat exchanger and BOG carries out heat exchange.
The working procedure of above-mentioned BOG recycling system is:
The BOG reclaimed in LNG storage tank 1 is warming up to normal temperature through air-heating type gasifier 2, and the BOG of normal temperature enters the first compressor 3 supercharging, and send in heat exchanger subsequently and liquefy as LNG, the LNG of post liquefaction are again through first throttle valve 6 reducing pressure by regulating flow, last re-injection is in LNG storage tank 1; Mix refrigerant is pressurized to High Temperature High Pressure through the second compressor 11, then normal temperature high voltage is cooled to by condenser 12, mix refrigerant finally after cooling is sent in heat exchanger through second throttle 13 step-down, in heat exchanger, mixed refrigerant vapor is LNG for condensation BOG provides cold to make BOG liquefy.
This BOG recycling system is coordinated by rational equipment, is made full use of by the BOG of recovery, avoids BOG emptying to cause the waste of environmental pollution and resource, does not need additionally to build BOG comprehensive utilization station outside storehouse simultaneously, more economic and practical.
Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's principle of the present utility model, should be understood to that protection domain of the present utility model is not limited to so special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combination of not departing from the utility model essence according to these technology enlightenment disclosed in the utility model, and these distortion and combination are still in protection domain of the present utility model.
Claims (6)
1. a LNG warehouse BOG recycling system, it is characterized in that: comprise be connected successively LNG storage tank (1), for BOG is heated up air-heating type gasifier (2), for first compressor (3) of the BOG supercharging after heating up to air-heating type gasifier (2) with for being the heat exchanger of LNG by BOG liquefaction, the LNG of post liquefaction sends into LNG storage tank (1) recycling through the first outlet (5) of heat exchanger.
2. recycling system according to claim 1, it is characterized in that: also comprise for the second compressor (11) to mix refrigerant supercharging and the condenser (12) for cooling and mixing refrigeration agent, mix refrigerant is fed back to the second compressor (11) successively after the second compressor (11) and condenser (12) enter heat exchanger and BOG carries out heat exchange.
3. recycling system according to claim 2, it is characterized in that: described heat exchanger is provided with the second import (7), the second outlet (8), triple feed inlet (9) and the 3rd outlet (10), second import (7) is connected with the outlet of condenser (12), 3rd outlet (10) is connected with the second compressor (11), the outlet of the second compressor (11) is connected with condenser (12), and the second outlet (8) is connected with triple feed inlet (9).
4. recycling system according to claim 3, is characterized in that: be provided with second throttle (13) between described second outlet (8) and triple feed inlet (9).
5. according to the arbitrary described recycling system of Claims 1-4, it is characterized in that: between described first outlet (5) and LNG storage tank (1), be provided with first throttle valve (6).
6., according to the arbitrary described recycling system of Claims 1-4, it is characterized in that: described heat exchanger is provided with the first import (4), the outlet of the first compressor (3) is connected with the first import (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520071257.6U CN204477679U (en) | 2015-02-02 | 2015-02-02 | A kind of LNG warehouse BOG recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520071257.6U CN204477679U (en) | 2015-02-02 | 2015-02-02 | A kind of LNG warehouse BOG recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204477679U true CN204477679U (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520071257.6U Expired - Fee Related CN204477679U (en) | 2015-02-02 | 2015-02-02 | A kind of LNG warehouse BOG recycling system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135208A (en) * | 2015-08-20 | 2015-12-09 | 中国石油大学(北京) | Compression recycling method for evaporation gas of liquefied natural gas |
| CN107314615A (en) * | 2016-06-12 | 2017-11-03 | 中国石油化工股份有限公司 | LNG drops a hint re-liquefied recovery method |
| CN108751299A (en) * | 2018-05-30 | 2018-11-06 | 江苏科技大学 | LNG cold energy generations and seawater desalination system and its method of comprehensive utilization on a kind of FSRU |
| CN110088521A (en) * | 2016-12-23 | 2019-08-02 | 国际壳牌研究有限公司 | For the ship of transport liquefied gases and the operating method of ship |
-
2015
- 2015-02-02 CN CN201520071257.6U patent/CN204477679U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135208A (en) * | 2015-08-20 | 2015-12-09 | 中国石油大学(北京) | Compression recycling method for evaporation gas of liquefied natural gas |
| CN107314615A (en) * | 2016-06-12 | 2017-11-03 | 中国石油化工股份有限公司 | LNG drops a hint re-liquefied recovery method |
| CN110088521A (en) * | 2016-12-23 | 2019-08-02 | 国际壳牌研究有限公司 | For the ship of transport liquefied gases and the operating method of ship |
| CN110088521B (en) * | 2016-12-23 | 2022-04-05 | 国际壳牌研究有限公司 | Vessel for transporting liquefied gas and method of operating vessel |
| US11698169B2 (en) | 2016-12-23 | 2023-07-11 | Shell Usa, Inc. | Vessel for the transport of liquefied gas and method of operating the vessel |
| CN108751299A (en) * | 2018-05-30 | 2018-11-06 | 江苏科技大学 | LNG cold energy generations and seawater desalination system and its method of comprehensive utilization on a kind of FSRU |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20160202 |