CN104989956A - Skid-mounted LNG leakage diffusion restrain and emergency device for LNG stations - Google Patents
Skid-mounted LNG leakage diffusion restrain and emergency device for LNG stations Download PDFInfo
- Publication number
- CN104989956A CN104989956A CN201510278687.XA CN201510278687A CN104989956A CN 104989956 A CN104989956 A CN 104989956A CN 201510278687 A CN201510278687 A CN 201510278687A CN 104989956 A CN104989956 A CN 104989956A
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- Prior art keywords
- lng
- foam
- skid
- station
- leakage diffusion
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- Pending
Links
- 238000009792 diffusion process Methods 0.000 title claims abstract description 32
- 239000006260 foam Substances 0.000 claims abstract description 103
- 239000007788 liquid Substances 0.000 claims abstract description 61
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims description 13
- 230000001629 suppression Effects 0.000 claims description 10
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 3
- 239000011550 stock solution Substances 0.000 claims description 3
- 239000003949 liquefied natural gas Substances 0.000 abstract description 64
- 238000001704 evaporation Methods 0.000 abstract description 13
- 230000008020 evaporation Effects 0.000 abstract description 13
- 239000003915 liquefied petroleum gas Substances 0.000 abstract description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 3
- 238000004880 explosion Methods 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a skid-mounted LNG leakage diffusion restrain and emergency device for LNG stations, and belongs to the technical field of safety engineering of liquefied natural gas. The skid-mounted LNG leakage diffusion restrain and emergency device comprises a movable skid-mounted pedestal, the movable skid-mounted pedestal is provided with a foam mixed liquor barrel and a nitrogen steel cylinder, the nitrogen steel cylinder and the foam mixed liquor barrel are connected through a nitrogen delivery pipe. A high-multiple foam generator is disposed over the foam mixed liquor barrel, the foam mixed liquor barrel is connected with the high-multiple foam generator through a foam mixed liquor delivery pipe, an explosion-proof blower is mounted to the rear end of the high-multiple foam generator, the explosion-proof blower is connected with a mobile power supply, and the mobile power supply is disposed on the movable skid-mounted pedestal. The skid-mounted LNG leakage diffusion restrain and emergency device for LNG stations can be applied to places such as an LNG station, an LNG receiving station, a liquefaction factory, an LNG peak-shaving station and a liquefied petroleum gas station. The skid-mounted LNG leakage diffusion restrain and emergency device can be immediately used if large-area leakage occurs in an LNG station, high-multiple foam is generated to restrain the steam cloud in an LNG liquid pool of evaporation and diffusion, the evaporation rate can be reduced, and the severe secondary disaster can be prevented.
Description
Technical Field
The invention belongs to the technical field of liquefied natural gas safety, and particularly relates to skid-mounted LNG station LNG leakage diffusion inhibition emergency equipment.
Background
In recent years, the liquefied natural gas industry in China is rapidly expanded, and stations such as a plurality of LNG liquefaction plants, LNG receiving stations, a large number of LNG filling stations and the like are put into use. Due to the fact that the LNG temperature is extremely low (-162 ℃), the gas-liquid expansion ratio is large, once the LNG leaks in the storage process, the LNG is easy to volatilize and forms an explosive mixture with air, and the danger of fire explosion is caused when the LNG meets an ignition source. Therefore, evaporation and diffusion of the leaked LNG are restrained, further diffusion of the LNG can be prevented by reducing the evaporation rate, and personal injury and LNG fire are avoided.
High expansion foam is a method recommended by the U.S. federal regulations NFPA 59A to suppress LNG vapor cloud diffusion and control LNG fires. At present, in large-scale stations such as LNG receiving stations, a diversion channel is generally arranged in a place where LNG is easy to leak, the leaked LNG is introduced into a liquid collecting tank, the liquid collecting tank is provided with a high-expansion foam device, and when the temperature drop in the liquid collecting tank is detected, a high-expansion foam system is started to inhibit the diffusion of the LNG.
At present, a high-expansion foam system is not generally equipped in small stations such as LNG gas stations, and a dry powder fire extinguisher is mainly used for controlling fire. However, the storage tank capacity of the existing LNG gas station is generally 60-180m3If leakage occurs, a liquid pool is formed, and the steam cloud formed by diffusion is easy to encounter an ignition source to cause a large-area fire disaster, thereby causing serious consequences. Although a fixed high-expansion foam system is arranged in large places such as an LNG receiving station, a liquefaction plant and the like, if LNG leaks from a part far away from a liquid collecting tank, large-area vapor cloud diffusion can be caused, and serious consequences are caused.
It will thus be seen that the prior art is susceptible to further improvements and enhancements.
Disclosure of Invention
The skid-mounted LNG station LNG leakage diffusion inhibition emergency equipment can be used immediately after large-area leakage of an LNG station occurs, high-expansion foam is generated to inhibit evaporation diffusion of vapor cloud in an LNG liquid pool, evaporation rate is reduced, and more serious secondary disasters are avoided.
The technical scheme adopted by the invention is as follows:
the utility model provides a sled dress formula LNG station LNG leaks emergent equipment of diffusion suppression, including movable sled dress base, be provided with foam mixing liquid bucket and nitrogen gas steel bottle on the movable sled dress base, nitrogen gas steel bottle and foam mixing liquid bucket pass through nitrogen gas pipeline and link to each other, foam mixing liquid bucket top is provided with high multiple foam generator, foam mixing liquid bucket passes through foam mixing liquid conveyer pipe and high multiple foam generator intercommunication, explosion-proof air-blower is installed to high multiple foam generator's rear end, explosion-proof air-blower passes through the power supply line and links to each other with portable power source, portable power source sets up on movable sled dress base.
The front end of the high-multiple foam generator is connected with a foam guide cylinder, and a filter screen is arranged between the high-multiple foam generator and the foam guide cylinder.
The high-multiple foam generator is installed on a height-adjustable supporting rod, and the height-adjustable supporting rod is arranged on a movable skid-mounted base.
The end of the foam mixed liquid conveying pipe is positioned in the high-multiple foam generator, and the end of the foam mixed liquid conveying pipe is provided with a foam mixed liquid spray head.
And a foam mixed liquid flow regulating valve is arranged on the foam mixed liquid conveying pipe.
And a nitrogen main valve and a nitrogen pressure reducing valve are arranged on the nitrogen conveying pipeline.
The explosion-proof blower is an explosion-proof variable frequency fan.
The portable power source is an explosion-proof storage battery.
The foam mixed liquid barrel is a pressure container, and foam mixed liquid is contained in the foam mixed liquid barrel and is formed by mixing foam stock solution and water in proportion.
Four rollers are installed on the movable skid-mounted base.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention can be used as emergency disposal after leakage of stations such as LNG gas stations and the like, can effectively inhibit evaporation diffusion of LNG to reduce evaporation rate, and reduces large-area diffusion caused by LNG leakage; the invention can also be applied to large-scale places such as LNG receiving stations, liquefaction plants, LNG peak shaving stations, liquefied petroleum gas and the like, and is used as an auxiliary device of a fixed high-multiple foam system.
2. The invention can be used immediately after large-area leakage of the LNG station, generates high-multiple foam to inhibit evaporation and diffusion of vapor cloud in the LNG liquid pool, reduces evaporation rate, avoids causing more serious secondary disasters, and has the characteristics of mobility and convenient operation.
3. The invention solves the current situation that the LNG station, particularly the LNG filling station, is lack of LNG evaporation diffusion inhibition emergency equipment at present, and can be applied to foam covering of a formed liquid pool when local large-area leakage occurs in the LNG filling station, the LNG receiving station, the LNG liquefaction factory, the LNG peak shaving station and other places, thereby reducing the evaporation rate of liquefied natural gas and avoiding more serious consequences such as fire explosion and the like.
4. The invention can obtain different foaming times by adjusting parameters such as the rotating speed of the variable frequency fan, the nitrogen pressure, the flow of the foam mixed liquid and the like, and can be properly adjusted according to the field leakage condition.
5. Compared with the traditional high-expansion foam device, the device does not need water source and electric power, and can be directly put into use after LNG leakage occurs in a station yard.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein,
1. movable skid-mounted base 2, mobile power supply 3, explosion-proof air blower 4, high multiple foam generator 5, foam mixed liquid spray head 6, filter screen 7, bubble guide cylinder 8, height-adjustable support rod 9, nitrogen steel cylinder 10, foam mixed liquid barrel 11, foam mixed liquid flow regulating valve 12, nitrogen pressure reducing valve 13 and nitrogen main valve
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, but the present invention is not limited to these examples.
As shown in fig. 1, the skid-mounted LNG station LNG leakage diffusion inhibition emergency equipment comprises a movable skid-mounted base 1, wherein four rollers are mounted on the movable skid-mounted base 1, a foam mixed liquid barrel 10 and a nitrogen steel cylinder 9 are arranged on the movable skid-mounted base 1, the nitrogen steel cylinder 9 and the foam mixed liquid barrel 10 are connected through a nitrogen conveying pipeline, a nitrogen main valve 13 and a nitrogen pressure reducing valve 12 are arranged on the nitrogen conveying pipeline, and the pressure of the nitrogen steel cylinder 9 is 1-13 MPa; the foam mixed liquid barrel 10 is a pressure container, foam mixed liquid is contained in the foam mixed liquid barrel, the foam mixed liquid is formed by mixing foam stock solution and water in proportion, a high-multiple foam generator 4 is arranged above the foam mixed liquid barrel 10, the nitrogen steel cylinder 9 is mainly used for pressing the foam mixed liquid in the foam mixed liquid barrel 10 out of the high-multiple foam generator 4 after the pressure of a nitrogen pressure reducing valve 12 is reduced, and the pressure of the nitrogen after the pressure reduction is smaller than the design pressure of the foam mixed liquid barrel 10; the high-multiple foam generator 4 is a cylindrical barrel with the diameter of 10-100 cm, the high-multiple foam generator 4 is installed on a height-adjustable supporting rod 8, the height-adjustable supporting rod 8 is arranged on the movable skid-mounted base 1, the height-adjustable supporting rod 8 can fix the high-multiple foam generator 4 at different heights, a foam mixed liquid barrel 10 is communicated with the high-multiple foam generator 4 through a foam mixed liquid conveying pipe, a foam mixed liquid flow regulating valve 11 is arranged on the foam mixed liquid conveying pipe, the tail end of the foam mixed liquid conveying pipe is positioned in the high-multiple foam generator 4, a foam mixed liquid nozzle 5 is arranged at the tail end of the foam mixed liquid conveying pipe, an anti-explosion air blower 3 is installed at the rear end of the high-multiple foam generator 4, the anti-explosion air blower 3 is an anti-explosion variable frequency fan, and different foaming multiples can, explosion-proof air-blower 3 passes through the power supply line and links to each other with portable power source 2, and portable power source 2 sets up on movable sled dress base 1, and this portable power source 2 is explosion-proof battery, and the power supply time is no less than 30 minutes, and high multiple foam generator 4's front end is connected with and leads bubble section of thick bamboo 7, is provided with filter screen 6 between high multiple foam generator 4 and the bubble section of thick bamboo 7.
After large-area leakage occurs in an LNG storage place, the emergency equipment disclosed by the invention can be moved to the vicinity of a formed liquid pool, a mobile power supply 2 is opened, an explosion-proof variable frequency fan 3 is started, a nitrogen main valve 13 is opened, a pressure reducing valve 12 is opened, the pressure is adjusted to 0.5-1MPa, a foam mixed liquid flow regulating valve 11 is opened, the foam mixed liquid is pumped to a high-multiple foam generator 4, the generated high-multiple foam is covered on the surface of the liquid pool under the action of the explosion-proof air blower 3, and the evaporation of LNG is reduced. The foaming times of the high-expansion foam produced by the invention are 200-1000 times.
Parts which are not described in the invention can be realized by adopting or referring to the prior art.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a sled dress formula LNG station LNG leaks diffusion and restraines emergent equipment which characterized in that: including movable sled dress base, be provided with foam mixing liquid bucket and nitrogen gas steel bottle on the movable sled dress base, nitrogen gas steel bottle and foam mixing liquid bucket pass through nitrogen gas pipeline and link to each other, foam mixing liquid bucket top is provided with high multiple foam generator, foam mixing liquid bucket passes through foam mixing liquid conveyer pipe and high multiple foam generator intercommunication, explosion-proof air-blower is installed to high multiple foam generator's rear end, explosion-proof air-blower passes through the power supply line and links to each other with portable power source, portable power source sets up on movable sled dress base.
2. The skid-mounted LNG station LNG leakage diffusion suppression emergency equipment of claim 1, wherein: the front end of the high-multiple foam generator is connected with a foam guide cylinder, and a filter screen is arranged between the high-multiple foam generator and the foam guide cylinder.
3. The skid-mounted LNG station LNG leakage diffusion suppression emergency equipment of claim 1, wherein: the high-multiple foam generator is installed on a height-adjustable supporting rod, and the height-adjustable supporting rod is arranged on a movable skid-mounted base.
4. The skid-mounted LNG station LNG leakage diffusion suppression emergency equipment of claim 1, wherein: the end of the foam mixed liquid conveying pipe is positioned in the high-multiple foam generator, and the end of the foam mixed liquid conveying pipe is provided with a foam mixed liquid spray head.
5. The skid-mounted LNG station LNG leakage diffusion suppression emergency equipment according to claim 1 or 4, wherein: and a foam mixed liquid flow regulating valve is arranged on the foam mixed liquid conveying pipe.
6. The skid-mounted LNG station LNG leakage diffusion suppression emergency equipment of claim 1, wherein: and a nitrogen main valve and a nitrogen pressure reducing valve are arranged on the nitrogen conveying pipeline.
7. The skid-mounted LNG station LNG leakage diffusion suppression emergency equipment of claim 1, wherein: the explosion-proof blower is an explosion-proof variable frequency fan.
8. The skid-mounted LNG station LNG leakage diffusion suppression emergency equipment of claim 1, wherein: the portable power source is an explosion-proof storage battery.
9. The skid-mounted LNG station LNG leakage diffusion suppression emergency equipment of claim 1, wherein: the foam mixed liquid barrel is a pressure container, and foam mixed liquid is contained in the foam mixed liquid barrel and is formed by mixing foam stock solution and water in proportion.
10. The skid-mounted LNG station LNG leakage diffusion suppression emergency equipment of claim 1, wherein: four rollers are installed on the movable skid-mounted base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510278687.XA CN104989956A (en) | 2015-05-27 | 2015-05-27 | Skid-mounted LNG leakage diffusion restrain and emergency device for LNG stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510278687.XA CN104989956A (en) | 2015-05-27 | 2015-05-27 | Skid-mounted LNG leakage diffusion restrain and emergency device for LNG stations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104989956A true CN104989956A (en) | 2015-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510278687.XA Pending CN104989956A (en) | 2015-05-27 | 2015-05-27 | Skid-mounted LNG leakage diffusion restrain and emergency device for LNG stations |
Country Status (1)
| Country | Link |
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| CN (1) | CN104989956A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105920762A (en) * | 2016-04-21 | 2016-09-07 | 中国石油化工股份有限公司 | Pre-mixing type high-expansion foam generation device |
| CN106769690A (en) * | 2017-03-10 | 2017-05-31 | 中国石油大学(华东) | A kind of heavy gas leakage diffusion and control research experiment method |
| CN106840588A (en) * | 2017-03-10 | 2017-06-13 | 中国石油大学(华东) | A kind of heavy gas leakage diffusion simulations and suppression control test system |
| CN110478829A (en) * | 2018-05-14 | 2019-11-22 | 中国石油化工股份有限公司 | A kind of emergence treating method and system inhibiting LNG steam diffusion and liquid pool fire |
| CN114294558A (en) * | 2021-12-21 | 2022-04-08 | 广东华南特种气体研究所有限公司 | Emergent emptying devices of LNG tank wagon |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3780812A (en) * | 1971-07-06 | 1973-12-25 | M Lambert | Method and apparatus for generating fire-fighting foam |
| GB2246294A (en) * | 1990-06-29 | 1992-01-29 | Hygood Ltd | Fire-extinguishing systems |
| CN202136720U (en) * | 2011-03-29 | 2012-02-08 | 西安新竹实业有限责任公司 | Movable foam fire extinguishing apparatus |
| CN202355732U (en) * | 2011-12-06 | 2012-08-01 | 西安新竹实业有限责任公司 | Self-air-preparation high-expansion foam generator |
| CN202961631U (en) * | 2012-11-22 | 2013-06-05 | 陕西银河消防科技装备有限公司 | Movable multi-extinguishant fire extinguishing device |
| CN103585727A (en) * | 2013-11-08 | 2014-02-19 | 西安新竹防灾救生设备有限公司 | High-expansion foam generator |
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2015
- 2015-05-27 CN CN201510278687.XA patent/CN104989956A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3780812A (en) * | 1971-07-06 | 1973-12-25 | M Lambert | Method and apparatus for generating fire-fighting foam |
| GB2246294A (en) * | 1990-06-29 | 1992-01-29 | Hygood Ltd | Fire-extinguishing systems |
| CN202136720U (en) * | 2011-03-29 | 2012-02-08 | 西安新竹实业有限责任公司 | Movable foam fire extinguishing apparatus |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105920762A (en) * | 2016-04-21 | 2016-09-07 | 中国石油化工股份有限公司 | Pre-mixing type high-expansion foam generation device |
| CN106769690A (en) * | 2017-03-10 | 2017-05-31 | 中国石油大学(华东) | A kind of heavy gas leakage diffusion and control research experiment method |
| CN106840588A (en) * | 2017-03-10 | 2017-06-13 | 中国石油大学(华东) | A kind of heavy gas leakage diffusion simulations and suppression control test system |
| CN106840588B (en) * | 2017-03-10 | 2019-07-09 | 中国石油大学(华东) | A kind of heavy gas leakage diffusion simulations and inhibit control test system |
| CN106769690B (en) * | 2017-03-10 | 2019-08-02 | 中国石油大学(华东) | A kind of heavy gas leakage diffusion and control research experiment method |
| CN110478829A (en) * | 2018-05-14 | 2019-11-22 | 中国石油化工股份有限公司 | A kind of emergence treating method and system inhibiting LNG steam diffusion and liquid pool fire |
| CN110478829B (en) * | 2018-05-14 | 2021-07-06 | 中国石油化工股份有限公司 | Emergency disposal method and system for inhibiting LNG (liquefied Natural gas) vapor diffusion and liquid pool fire |
| CN114294558A (en) * | 2021-12-21 | 2022-04-08 | 广东华南特种气体研究所有限公司 | Emergent emptying devices of LNG tank wagon |
| CN114294558B (en) * | 2021-12-21 | 2023-11-21 | 广东华南特种气体研究所有限公司 | Emergent evacuation equipment of LNG tank wagon |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| 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: 20151021 |