CN204062478U - A kind of BOG liquefaction plant again - Google Patents
A kind of BOG liquefaction plant again Download PDFInfo
- Publication number
- CN204062478U CN204062478U CN201420537037.3U CN201420537037U CN204062478U CN 204062478 U CN204062478 U CN 204062478U CN 201420537037 U CN201420537037 U CN 201420537037U CN 204062478 U CN204062478 U CN 204062478U
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- Prior art keywords
- bog
- liquid nitrogen
- lng
- nitrogen storage
- gas
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- Expired - Lifetime
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 118
- 239000007788 liquid Substances 0.000 claims abstract description 69
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 59
- 238000009792 diffusion process Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 abstract description 43
- 239000003502 gasoline Substances 0.000 abstract description 9
- 238000004064 recycling Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000003949 liquefied natural gas Substances 0.000 description 43
- 238000000034 method Methods 0.000 description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000003345 natural gas 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 BOG liquefaction plant again, belong to technical field of LNG.BOG of the present utility model liquefaction plant again, comprises liquid nitrogen storage, is provided with heat exchanger coiled pipe in described liquid nitrogen storage, and the two ends of described heat exchanger coiled pipe are respectively the BOG entrance that stretches out liquid nitrogen storage and LNG exports; Described liquid nitrogen storage be provided with for nitrogen fills mouth and under fill mouth.BOG of the present utility model liquefaction plant again, mainly solves the problem of the recycling of flash gasoline (BOG), utilizes the cold energy of liquid nitrogen that BOG gas liquid is changed into LNG, and LNG fluid temperature is reduced; The cold energy of liquid nitrogen can liquefy to flash gasoline (BOG) and lower the temperature to LNG liquid, ensures the efficient recycling of BOG gas, has accomplished the zero-emission of BOG gas, decreased greenhouse effect and various potential safety hazard, is suitable for various LNG gas station and uses.
Description
Technical field
The utility model relates to technical field of LNG, especially a kind of liquefaction plant again of LNG flash gasoline (BOG).
Background technique
Because LNG Liquefied natural gas (LNG) has the feature of low temperature properties and vapo(u)rability, therefore LNG is when storing, transporting and working, the LNG flash gasoline (BOG) of some can be produced, flash gasoline (BOG) is if can not utilize well, be discharged in air, cause the wasting of resources on the one hand LNG gas station, have very large economic loss; Also pollute the environment on the other hand, in BOG gas, main component is methane, and methane is a kind of greenhouse gases, and its greenhouse effect are 25 times of carbon dioxide, very large on the impact of environment, also there is the potential safety hazard of gas fuel burning, blast simultaneously.
At present, the BOG recovery method that industry is conventional has pipe network to reclaim, stand internal consumption and LNG-CNG compressor reclaim three kinds of methods:
1, pipe network recovery method is by BOG gas unnecessary for gas station through the heating of BOG heater, then through pressure regulation, measure, adding the operation such as smelly, then to send into pipeline network of fuel gas in city civilian, this method can be subject to the restriction of pipeline network of fuel gas in city.
2, internal consumption of standing is that metering adds smelly by BOG gas unnecessary for gas station through the heating of BOG heater, pressure regulation, then sends in station and uses voluntarily, and this method needs to add the equipment such as heating, pressure regulation and the recovery utilization rate of BOG gas is low.
3, LNG-CNG compressor reclaims is to be stored in knock out drum after BOG gas heater via unnecessary in station heating, send into CNG gas storage system in station after natural gas compressor compression become CNG gas to entering through pressure governor pressure regulation after a certain amount of, this method needs to add the equipment such as compressor, drop into very large, cost is high, and general small-sized producer is unable to be born.
Model utility content
Goal of the invention of the present utility model is: for above-mentioned Problems existing, a kind of BOG liquefaction plant is again provided, mainly solve the problem of the recycling of flash gasoline (BOG), utilize the cold energy of liquid nitrogen that BOG gas liquid is changed into LNG, LNG fluid temperature is reduced; Due to liquid nitrogen boiling point about-196 DEG C at ambient pressure, and boiling point about-162 DEG C under LNG normal pressure, liquid nitrogen temperature is significantly less than LNG temperature, therefore the cold energy of liquid nitrogen can liquefy to flash gasoline (BOG) and lower the temperature to LNG liquid, ensure the efficient recycling of BOG gas, accomplish the zero-emission of BOG gas, decreased greenhouse effect and various potential safety hazard, be suitable for various LNG gas station and use.
The technical solution adopted in the utility model is as follows:
BOG of the present utility model liquefaction plant again, comprises liquid nitrogen storage, is provided with heat exchanger coiled pipe in described liquid nitrogen storage, and the two ends of described heat exchanger coiled pipe are respectively the BOG entrance that stretches out liquid nitrogen storage and LNG exports; Described liquid nitrogen storage be provided with for nitrogen fills mouth and under fill mouth.
Owing to have employed said structure, this liquefaction plant is installed in LNG gas station cofferdam, at ordinary times always for storing liquid nitrogen, when liquid nitrogen is not enough by fill mouth, under fill mouth and fill.When needs carry out BOG liquefaction reclaim time, by BOG gas by BOG entrance inject heat exchanger coiled pipe, through heat exchanger coiled pipe by thermal release to the liquid nitrogen in storage tank, BOG gas temperature reduces, again obtain post liquefaction and export outflow by LNG, flow back to LNG storage tank in station, realize BOG gas liquefaction cycle.Identical principle, when lowering the temperature to LNG liquid, LNG liquid enters coil pipe by BOG entrance, is exported get back to LNG storage tank in station by LNG.BOG of the present utility model liquefaction plant again, the BOG gas that can produce LNG gas station is all liquefied as LNG liquid, ensure the zero-emission of BOG gas, also can lowering the temperature by the LNG liquid higher to temperature in LNG station, is a kind of BOG liquefaction plant again of high-efficiency environment friendly.The heat transferring medium used is liquid nitrogen, can not cause environmental pollution, without potential safety hazard.Required main equipment liquid nitrogen storage and heat exchanger coiled pipe are very ripe product both at home and abroad, and production difficulty is little, and convenient purchase, complete equipment cost is low, and without maintenance and repair cost, feasibility is high.
BOG of the present utility model liquefaction plant again, described liquid nitrogen storage is also provided with diffusion mouth and surveys full valve; Described diffusion mouth is connected on the pipeline of liquid nitrogen storage, opens when the pressure be provided with in liquid nitrogen storage is more than or equal to 0.6MPa, the automatic relief valve of closing when pressure is less than or equal to 0.4MPa.
Owing to have employed said structure, in BOG gas callback course, in storage tank, liquid nitrogen constantly gasifies owing to constantly absorbing the heat of BOG gas, gas after gasification makes liquid nitrogen storage internal pressure constantly rise, open automatic relief valve when pressure increase to control system during 0.6MPa to diffuse, when Pressure Drop stops diffusing to closing automatic relief valve during 0.4MPa.When liquid nitrogen in liquid nitrogen storage lower than 1/4 time again fill liquid nitrogen, to ensure BOG heat exchange.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
1, BOG of the present utility model liquefaction plant again, mainly solves the problem of the recycling of flash gasoline (BOG), utilizes the cold energy of liquid nitrogen that BOG gas liquid is changed into LNG, and LNG fluid temperature is reduced; The cold energy of liquid nitrogen can liquefy to flash gasoline (BOG) and lower the temperature to LNG liquid, ensures the efficient recycling of BOG gas, has accomplished the zero-emission of BOG gas, decreased greenhouse effect and various potential safety hazard, is suitable for various LNG gas station and uses.
2, BOG of the present utility model liquefaction plant again, the heat transferring medium of use is liquid nitrogen, can not cause environmental pollution, without potential safety hazard.Production difficulty is little, and convenient purchase, complete equipment cost is low, and without maintenance and repair cost, feasibility is high.
Accompanying drawing explanation
The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structural representation of BOG of the present utility model liquefaction plant again.
Mark in figure: under 1-liquid nitrogen storage, 2-heat exchanger coiled pipe, 3-fill mouth, 4-, fill mouth, 5-BOG entrance, 6-LNG outlet, the full valve of 7-automatic relief valve, 8-diffusion mouth, 9-survey.
Embodiment
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification (comprising any accessory claim, summary), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
As Fig. 1, BOG of the present utility model liquefaction plant again, comprises liquid nitrogen storage 1, is provided with heat exchanger coiled pipe 2 in described liquid nitrogen storage 1, and the two ends of described heat exchanger coiled pipe 2 are respectively the BOG entrance 5 stretching out liquid nitrogen storage 1 and export 6 with LNG; Described liquid nitrogen storage 1 be provided with for nitrogen fills mouth 3 and under fill mouth 4.Described liquid nitrogen storage 1 be also provided with diffusion mouth 8 and survey full valve 9; Described diffusion mouth 8 is connected on the pipeline of liquid nitrogen storage 1, open when the pressure be provided with in liquid nitrogen storage 1 is more than or equal to 0.6MPa, the automatic relief valve 7 of closing when pressure is less than or equal to 0.4MPa, this automatic relief valve 7 can be as required, select the spring or the shell fragment that are applicable to pressure, also can select to adopt existing electronic surveying and control technique.
BOG of the present utility model liquefaction plant again, is installed in LNG gas station cofferdam, at ordinary times always for storing liquid nitrogen, when liquid nitrogen is not enough by fill mouth, under fill mouth and fill.When needs carry out BOG liquefaction reclaim time, by BOG gas by BOG entrance inject heat exchanger coiled pipe, through heat exchanger coiled pipe by thermal release to the liquid nitrogen in storage tank, BOG gas temperature reduces, again obtain post liquefaction and export outflow by LNG, flow back to LNG storage tank in station, realize BOG gas liquefaction cycle.Identical principle, when lowering the temperature to LNG liquid, LNG liquid enters coil pipe by BOG entrance, is exported get back to LNG storage tank in station by LNG.BOG of the present utility model liquefaction plant again, the BOG gas that can produce LNG gas station is all liquefied as LNG liquid, ensure the zero-emission of BOG gas, also can lowering the temperature by the LNG liquid higher to temperature in LNG station, is a kind of BOG liquefaction plant again of high-efficiency environment friendly.The heat transferring medium used is liquid nitrogen, can not cause environmental pollution, without potential safety hazard.Required main equipment liquid nitrogen storage and heat exchanger coiled pipe are very ripe product both at home and abroad, and production difficulty is little, and convenient purchase, complete equipment cost is low, and without maintenance and repair cost, feasibility is high.In BOG gas callback course, in storage tank, liquid nitrogen constantly gasifies owing to constantly absorbing the heat of BOG gas, gas after gasification makes liquid nitrogen storage internal pressure constantly rise, open automatic relief valve when pressure increase to control system during 0.6MPa to diffuse, when Pressure Drop stops diffusing to closing automatic relief valve during 0.4MPa.When liquid nitrogen in liquid nitrogen storage lower than 1/4 time again fill liquid nitrogen, to ensure BOG heat exchange.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (2)
1. BOG liquefaction plant again, it is characterized in that: it comprises liquid nitrogen storage (1), be provided with heat exchanger coiled pipe (2) in described liquid nitrogen storage (1), the two ends of described heat exchanger coiled pipe (2) are respectively the BOG entrance (5) stretching out liquid nitrogen storage (1) and export (6) with LNG; Described liquid nitrogen storage (1) be provided with for nitrogen fills mouth (3) and under fill mouth (4).
2. BOG liquefaction plant again as claimed in claim 1, is characterized in that: described liquid nitrogen storage (1) be also provided with diffusion mouth (8) and survey full valve (9); Described diffusion mouth (8) is connected on the pipeline of liquid nitrogen storage (1), opens when the pressure be provided with in liquid nitrogen storage (1) is more than or equal to 0.6MPa, the automatic relief valve (7) of closing when pressure is less than or equal to 0.4MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420537037.3U CN204062478U (en) | 2014-09-18 | 2014-09-18 | A kind of BOG liquefaction plant again |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420537037.3U CN204062478U (en) | 2014-09-18 | 2014-09-18 | A kind of BOG liquefaction plant again |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204062478U true CN204062478U (en) | 2014-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420537037.3U Expired - Lifetime CN204062478U (en) | 2014-09-18 | 2014-09-18 | A kind of BOG liquefaction plant again |
Country Status (1)
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| CN (1) | CN204062478U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713310A (en) * | 2015-03-11 | 2015-06-17 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling control method |
| CN104819379A (en) * | 2015-04-21 | 2015-08-05 | 新奥气化采煤有限公司 | Methane gas recovery system and recovery control method |
| CN104832780A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery system and method |
| CN104832785A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery system and method |
| CN104832782A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery control system and method |
| CN104832781A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery control system and method |
| CN104832783A (en) * | 2015-04-21 | 2015-08-12 | 新奥气化采煤有限公司 | Methane gas recovery system and recovery method |
| CN105003822A (en) * | 2015-07-02 | 2015-10-28 | 新奥气化采煤有限公司 | Recovery system and recovery method of compressed methane gas |
| CN105042327A (en) * | 2015-07-02 | 2015-11-11 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling method |
| CN105135211A (en) * | 2015-08-26 | 2015-12-09 | 成都深冷科技有限公司 | BOG condensation recycling system and method for LNG station |
| CN108224080A (en) * | 2018-01-16 | 2018-06-29 | 中科睿凌江苏低温设备有限公司 | The dedicated system of the re-liquefied recovery process of mobile natural gas |
| CN110715166A (en) * | 2019-10-11 | 2020-01-21 | 郑志 | BOG (boil off gas) recovery system of LNG (liquefied natural gas) tank container |
-
2014
- 2014-09-18 CN CN201420537037.3U patent/CN204062478U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713310B (en) * | 2015-03-11 | 2018-01-12 | 新奥科技发展有限公司 | Methane gas recovery system and recycling and control method |
| CN104713310A (en) * | 2015-03-11 | 2015-06-17 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling control method |
| CN104832783A (en) * | 2015-04-21 | 2015-08-12 | 新奥气化采煤有限公司 | Methane gas recovery system and recovery method |
| CN104819379A (en) * | 2015-04-21 | 2015-08-05 | 新奥气化采煤有限公司 | Methane gas recovery system and recovery control method |
| CN104819379B (en) * | 2015-04-21 | 2017-11-07 | 新奥科技发展有限公司 | Methane gas recovery system and recycling and control method |
| CN104832782A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery control system and method |
| CN104832781A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery control system and method |
| CN104832785B (en) * | 2015-05-21 | 2017-08-01 | 新奥科技发展有限公司 | compressed methane gas recovery system and recovery method |
| CN104832782B (en) * | 2015-05-21 | 2017-09-19 | 新奥科技发展有限公司 | Compressed methane gas recovery control system and recycling and control method |
| CN104832785A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery system and method |
| CN104832780A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery system and method |
| CN105003822A (en) * | 2015-07-02 | 2015-10-28 | 新奥气化采煤有限公司 | Recovery system and recovery method of compressed methane gas |
| CN105042327A (en) * | 2015-07-02 | 2015-11-11 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling method |
| CN105135211A (en) * | 2015-08-26 | 2015-12-09 | 成都深冷科技有限公司 | BOG condensation recycling system and method for LNG station |
| CN108224080A (en) * | 2018-01-16 | 2018-06-29 | 中科睿凌江苏低温设备有限公司 | The dedicated system of the re-liquefied recovery process of mobile natural gas |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 610041 No.3, floor 11, building 6, no.599, shijicheng South Road, Chengdu high tech Zone, China (Sichuan) pilot Free Trade Zone, Chengdu City, Sichuan Province Patentee after: Houpu clean energy Co.,Ltd. Address before: 610041 D, Tianfu Software Park, 216 century South Road, Chengdu hi tech Zone, Sichuan, China Patentee before: CHENGDU HUAQI HOUPU HOLDING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.3, 11th floor, building 6, no.599, shijicheng South Road, Chengdu hi tech Zone, China (Sichuan) pilot Free Trade Zone, Chengdu, Sichuan 610041 Patentee after: Houpu clean energy (Group) Co.,Ltd. Address before: No.3, 11th floor, building 6, no.599, shijicheng South Road, Chengdu hi tech Zone, China (Sichuan) pilot Free Trade Zone, Chengdu, Sichuan 610041 Patentee before: Houpu clean energy Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141231 |