CN102654239B - Gasifying system for liquefied natural gas receiving terminal - Google Patents
Gasifying system for liquefied natural gas receiving terminal Download PDFInfo
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- CN102654239B CN102654239B CN201210159924.7A CN201210159924A CN102654239B CN 102654239 B CN102654239 B CN 102654239B CN 201210159924 A CN201210159924 A CN 201210159924A CN 102654239 B CN102654239 B CN 102654239B
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Abstract
The invention discloses a gasifying system for a liquefied natural gas receiving terminal. The gasifying system comprises a floatation type gasifying vessel module and a land module, wherein the floatation type gasifying vessel module comprises a floatation type gasifying vessel; at least one storage cabin is arranged on the floatation type gasifying vessel; the storage cabin is internally provided with a backward flow pump and an in-tank pump; the backward flow pump is communicated with a loading arm; the loading arm is connected with a discharging arm through a discharging main pipe; the in-tank pump is sequentially communicated with a high-pressure pump suction tank a, an LNG (Liquefied Natural Gas) high-pressure pump a, an LNG main gasifying device a and a pressure regulation metering crowbar a; an output end of the pressure regulation metering crowbar a is connected with a high-pressure gas transmission arm; an output end of the high-pressure gas transmission arm can be connected with a natural gas pipe network through pipelines; the storage cabin is communicated with a gas return arm a; and the gas return arm a is communicated with a gas return arm b through a BOG (Boil Off Gas) main pipe. The gasifying system disclosed by the invention overcomes the limitations of long construction period of the general land large LNG receiving terminal, large influences of neighboring environments and soil resource limitation, and poor flexibility and the like, and is good for rapid construction and production of a project.
Description
Technical field
The present invention relates to a kind of gasification system of LNG Liquefied natural gas receiving terminal.
Background technique
At present, when China's economic sustained and rapid development, ensure that the energy of economic development is but extremely in short supply.In the primary energy consumption of China, rock gas only accounts for 4.4%, well below world average level.Along with the continuous growth of country to energy demand, introducing LNG will be to effective solution the energy safety of supply, and Optimization of Energy Structure, improves the ecological environment, and realizes economy and social sustainable development and plays a significant role.Therefore, the fast development of China in Recent Years LNG Liquefied natural gas (LNG) industry, LNG receiving terminal is subject to extensive concern.At present, LNG resource is mainly from abroad obtaining, need arrive domestic through ocean large transport ship oceangoing ship, the LNG receiving terminal of domestic existing engineering experience is land large-scale receiving terminal, this receiving terminal technical maturity, by the land process facility of auxiliary construction, can realize continuous air feed and stronger storage capacity.But the conventional land large-scale receiving terminal construction period is grown, invests greatly, can not move, flexibility is poor, and be subject to surrounding enviroment and land resources limitations affect larger, especially in recent years, along with people's environmental consciousness strengthens, the restriction being subject at coastal land construction receiving terminal is increasing.
In order to improve the narrow limitation of traditional land LNG receiving terminal, taking into full account on the basis of technical feasibility, Security, Economy, floating LNG taking floating gasification vessel as carrier stores gasification facility technology and moves to maturity gradually, have the construction period short, be seated sea and reduced and build the advantages such as security risk, the flexibility of LNG receiving terminal is high, relative cost is low in populous region.But floating LNG stores gasification facility and still has its narrow limitation, in the time that environmental conditions is severe, floating LNG stores gasification facility and can not normally move, and faces the danger of interrupting external air feed.In the present invention, the gasification system of novel LNG receiving terminal stores the advantageous while of gasification facility except having had floating LNG, also there is following characteristics: in the time that LNG ships that transport interrupts alongside and environmental conditions that harbour can not operation occurs making floating gasification vessel must free departure from port or floating gasification vessel fault process facility can not to move, the gasification that can realize rock gas by land LNG storage tank and auxiliary facility thereof is outer defeated, ensures continuity air feed; Storage cabin on floating gasification vessel and land LNGLNG storage tank are for subsequent use each other, have greatly improved security of supply gas.At the LNG receiving terminal project construction initial stage, in the little situation of user market prematurity, gas consumption, the land minor installation of Fast Construction, seizes market in advance.
Summary of the invention
The object of this invention is to provide a kind of gasification system of LNG Liquefied natural gas receiving terminal, long mainly for the land Large LNG receiving terminal of routine building time, be difficult to meet the requirement that project is exploited market in earlier stage fast, develop the receiving terminal system that a kind of offshore floating reception facilities is combined with land reception facilities, not only met the requirement of Fast Construction but also can realize continuous safe way.
The gasification system of a kind of LNG Liquefied natural gas receiving terminal provided by the present invention, it comprises floating gasification vessel module and land module;
Described floating gasification vessel module comprises floating gasification vessel; Described floating gasification vessel is provided with at least 1 storage cabin; In described storage cabin, be provided with and pour in down a chimney pump in pump and tank; The described pump that pours in down a chimney is connected with shipment arm, and described shipment arm is connected with unloading arm by discharging house steward; In described tank, pump is connected with high-pressure service pump suction tank a, the main vaporizer a of LNG high-pressure service pump a, LNG and pressure regulation metering sled a successively, the output terminal of described pressure regulation metering sled a is connected with pressurized gas gas transmission arm, and the output terminal of described pressurized gas gas transmission arm can be connected with gas distributing system by pipeline; Described storage cabin is connected with return-air arm a, and described return-air arm a is connected with return-air arm b by house steward BOG;
Described land module comprises LNG storage tank; Described LNG storage tank is connected with described unloading arm and shipment arm by discharging house steward; Described LNG storage tank is connected with described return-air arm b and return-air arm a by house steward BOG; Described LNG storage tank is connected with LNG tank car by output pump.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system, described LNG storage tank is connected with output pump, high-pressure service pump suction tank b, the main vaporizer b of LNG high-pressure service pump b, LNG and pressure regulation metering sled b successively, and the output terminal of described pressure regulation metering sled b can be connected with rock gas webmaster by pipeline; In the time there is environmental conditions that harbour can not operation and make described floating gasification vessel must free departure from port or floating gasification vessel fault, LNG in land described LNG storage tank can described output pump, high-pressure service pump suction tank b, the main vaporizer b of LNG high-pressure service pump b, LNG and pressure regulation metering sled b through being equipped with realize outside gaseous state defeated on the bank, to ensure air feed continuity, this arranges the connection that has realized floating gasification vessel and land LNG storage tank.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system, described LNG storage tank is connected with described pressure regulation metering sled b by compressor, and it is user's air feed that the BOG in described LNG storage tank can be delivered to land gas distributing system through pipeline together after described compressor pressurizes after described pressure regulation metering sled b metering.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system, described LNG storage tank is connected with cold insulation pipeline by output pump, described cold insulation pipeline is connected with described unloading arm; Without unloading ship time, the small flow LNG in land described LNG storage tank can be delivered to harbour through described output pump, carries out the circulation of harbour cold insulation through described cold insulation pipeline.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system, described storage cabin with return ship BOG compressor and be connected, described in return ship BOG compressor and be connected with described return-air arm a; In the time of the underpressure of the BOG producing in described storage cabin, can be first through described in return ship BOG compressor and pressurize, be then transported to described return-air arm a.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system, described storage cabin recycles compressor and BOG by BOG and recycles unit and be connected.
The invention has the beneficial effects as follows: the gasification system of this LNG receiving terminal is applicable to require to realize rapid air feeding the coastal area Large LNG receiving station project high to air feed safety requirement.At the LNG receiving terminal project construction initial stage, in the little situation of user market prematurity, gas consumption, can utilize fast in advance floating gasification vessel and build land minor installation, can meet fast market gas demand, complete after air feed target, floating gasification vessel part can towage continues service to other place, and land LNG storage tank part can come into operation in the land Large LNG receiving terminal of follow-up construction.This system overcome conventional land Large LNG receiving terminal construction period long, be subject to surrounding enviroment and the narrow limitation such as land resources limitations affect is large, flexibility is poor, be conducive to Fast Construction and the operation of project, the problem that air feed can be solved floating gasification vessel fault or be freed by the LNG storage tank of land auxiliary construction and gasification facility again time interrupts simultaneously, realizes continuous safe way.
Brief description of the drawings
Fig. 1 is the structural representation of the gasification system of LNG receiving terminal provided by the invention.
Fig. 2 is the structural representation of the floating gasification vessel in the gasification system of LNG receiving terminal provided by the invention.
In figure, each mark is as follows: 1 LNG cargo ship, 2 unloading arms, 3 discharging house stewards, 4 shipment arms, 5 floating gasification vessels, 6 LNG storage tanks, 7 house stewards BOG, 8 return-air arm b, 9 return-air arm a, 10 pressurized gas gas transmission arms, 11 output pumps, 12 LNG tank cars, 13 high-pressure service pump suction tank b, 14 LNG high-pressure service pump b, the main vaporizer b of 15 LNG, 16 pressure regulation metering sledge b, 17 compressors, 18 cold insulation pipelines, 19 storage cabins, pump in 20 tanks, 21 high-pressure service pump suction tank a, 22 LNG high-pressure service pump a, the main vaporizer a of 23 LNG, 24 pressure regulation metering sledge a, 25 return ship BOG compressor, 26 BOG recycling compressors, 27 tank switching pumps, 28, 29 harbours, 30, 31, 32, 33, 35 pipelines, 34 BOG recycle unit.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but invention is not limited to following examples.
The gasification system of LNG receiving terminal provided by the invention comprises formula gasification vessel module and land module; This floating gasification vessel module comprises floating gasification vessel 5; This floating gasification vessel 5 is provided with in 4 storage cabin 19(figure and only illustrates 1); In each storage cabin 19, be provided with and pour in down a chimney pump 20 in pump 27 and tank; Pour in down a chimney pump 27 and be connected with the shipment arm 4 being arranged on harbour 29 by pipeline 30, this shipment arm 4 is connected with unloading arm 2 by discharging house steward 3, and this unloading arm 2 is arranged on harbour 28, and unloading arm 2 can be connected with LNG cargo ship 1; In tank, pump 20 is connected with high-pressure service pump suction tank a21, the main vaporizer a23 of LNG high-pressure service pump a22, LNG and pressure regulation metering sled a24 successively, the output terminal of pressure regulation metering sled a24 is connected with pressurized gas gas transmission arm 10 by pipeline 32, the output terminal of this pressurized gas gas transmission arm 10 is connected with gas distributing system by pipeline 33, is user's air feed; Storage cabin 19 with return ship BOG compressor 25 and be connected, this returns ship BOG compressor 25 and is connected with return-air arm a9 by pipeline 31, this return-air arm a9 is connected with the return-air arm b8 being arranged on harbour 28 by crossing house steward BOG 7, and return-air arm b8 is connected with LNG cargo ship 1; Storage cabin 19 recycles compressor 26 by BOG and is connected with BOG recycling unit 34; Land module comprises LNG storage tank 6; This LNG storage tank 6 is connected by discharging house steward 3 and unloading arm 2 and shipment arm 4, and then LNG cargo ship 1 can be transported to LNG in LNG storage tank 6, and LNG storage tank 6 is transported to floating LNG by LNG and is transported in floating gasification vessel 5; LNG storage tank 6 is connected with return-air arm b and return-air arm a by house steward BOG 7, and then the BOG of LNG storage tank 6 interior generations can be delivered in LNG cargo ship 1 and floating gasification vessel 5; LNG storage tank 6 is connected with LNG tank car 12 by output pump 11, and the liquid state that can carry out LNG is outer defeated; This LNG storage tank 6 is also connected with high-pressure service pump suction tank b13, the main vaporizer b15 of LNG high-pressure service pump b14, LNG and pressure regulation metering sled b16 successively by output pump 11, wherein the output terminal of pressure regulation metering sled b16 can be connected with gas distributing system by pipeline 33, is user's air feed; LNG storage tank 6 is also connected by compressor 17 and pressure regulation metering sled b16, so the BOG of LNG storage tank 6 interior generations after compressor 17 pressurizations and pressure regulation metering sled b16 measure, can be delivered to gas distributing system through pipeline 33 be user's air feed; LNG storage tank 6 is also connected with cold insulation pipeline 18 by output pump 11, and this cold insulation pipeline 18 is connected with unloading arm 2, thereby without unloading ship time, the small flow LNG in LNG storage tank 6 is delivered to harbour through output pump 11, carries out the circulation of harbour cold insulation through cold insulation pipeline 18.
The gasification system that uses above-mentioned LNG receiving terminal for the process of user's air feed as follows:
(1) LNG cargo ship 1 arrives after harbour 28, the LNG temperature of exporting on cargo ship is about-160 DEG C, pressure is 0.45MPag, part LNG is discharged into the storage cabin 19 on floating gasification vessel 5 by the unloading arm 2 on harbour 28 to the shipment arm 4 that discharging house steward 3 passes through on harbour 29 again by pipeline 30, if compress through returning ship BOG compressor 25 when on floating gasification vessel 5, the BOG of generation is by pipeline 31(underpressure) be transported to return-air arm a9, then be back to LNG cargo ship 1 through house steward BOG 7, return-air arm b8; Another part LNG is transported in land LNG storage tank 6 to discharging house steward 3 by the unloading arm 2 on harbour 28, and the BOG producing in LNG storage tank 6 passes through house steward BOG 7, then is back to LNG cargo ship 1 through the return-air arm b8 on harbour 28.LNG in the storage cabin 19 of floating gasification vessel 5 is forced into 0.5MPag by pump in tank 20, be delivered to the high-pressure service pump suction tank a21 before LNG high-pressure service pump a22, the LNG being pressurized to after 10MPag through LNG high-pressure service pump a22 is again gasificated into more than 10 DEG C rock gases after the main vaporizer a23 of LNG, through pressure regulation metering sled a24, pressure is adjusted to 9MPag again and enter pipeline 32, it is user's air feed that rock gas is delivered to land gas distributing system by pressurized gas gas transmission arm 10 through pipeline 33.It is user's air feed that BOG in land LNG storage tank 6 can be delivered to land gas distributing system through pipeline 33 together after compressor 17 pressurizations after pressure regulation metering sled b16 metering; Also can be delivered to floating gasification vessel 5 by house steward BOG 7, return-air arm a9, pipeline 31, after the BOG then producing with floating gasification vessel 5 through pipeline 35 mixes, enter BOG through 26 compressions of BOG recycling compressor and recycle unit 34.When nothing is unloaded the outer defeated operation of the normal gasification of ship time floating gasification vessel 5, the BOG of generation enters BOG through 26 compressions of BOG recycling compressor and recycles unit 34.LNG in land LNG storage tank 6 is delivered to LNG tank car 12 through output pump 11, and now LNG pressure reaches 0.4MPag, outer defeated for entrucking liquid state.Without unloading ship time, the small flow LNG in land LNG storage tank 6 is delivered to harbour through output pump 11, carries out the circulation of harbour cold insulation through cold insulation pipeline 18.
(2) when floating gasification vessel 5 faults or when harbour occurs can not operating condition floating gasification vessel 5 needing emergency release, LNG in land LNG storage tank 6 is forced into 0.4MPag through output pump 11, be delivered to the high-pressure service pump suction tank b13 before land LNG high-pressure service pump b14, be forced into 10Mpag through land LNG high-pressure service pump b14 again, deliver to the main vaporizer b15 gasification of LNG, natural gas temperature after gasification reaches more than 0 DEG C, and after pressure regulation metering sled b16, pressure is that 9MPag enters outside pipeline 33 and transports to gas distributing system.
(3), when without extraneous LNG resource, if the LNG deficiency in the storage cabin 19 of floating gasification vessel 5, the LNG in land LNG storage tank 6 is delivered in the storage cabin 19 of floating gasification vessel 5 through shipment arm 4 through output pump 11 and harbour discharging house steward 3; If the LNG deficiency in land LNG storage tank 6, the LNG in the storage cabin 19 of floating gasification vessel 5 can be forced into pipeline 30 by tank switching pump 27 and be transported to harbour discharging house steward 3 and be finally delivered in land LNG storage tank 6 through shipment arm 4 again.
Claims (5)
1. a gasification system for LNG Liquefied natural gas receiving terminal, is characterized in that: it comprises floating gasification vessel module and land module;
Described floating gasification vessel module comprises floating gasification vessel; Described floating gasification vessel is provided with at least 1 storage cabin; In described storage cabin, be provided with and pour in down a chimney pump in pump and tank; The described pump that pours in down a chimney is connected with shipment arm, and described shipment arm is connected with unloading arm by discharging house steward; In described tank, pump is connected with high-pressure service pump suction tank a, the main vaporizer a of LNG high-pressure service pump a, LNG and pressure regulation metering sled a successively, the output terminal of described pressure regulation metering sled a is connected with pressurized gas gas transmission arm, and the output terminal of described pressurized gas gas transmission arm can be connected with gas distributing system by pipeline; Described storage cabin is connected with return-air arm a, and described return-air arm a is connected with return-air arm b by house steward BOG;
Described land module comprises LNG storage tank; Described LNG storage tank is connected with described unloading arm and shipment arm by discharging house steward; Described LNG storage tank is connected with described return-air arm b and return-air arm a by house steward BOG; Described LNG storage tank is connected with LNG tank car by output pump;
Described LNG storage tank is connected with output pump, high-pressure service pump suction tank b, the main vaporizer b of LNG high-pressure service pump b, LNG and pressure regulation metering sled b successively, and the output terminal of described pressure regulation metering sled b can be connected with rock gas webmaster by pipeline.
2. the gasification system of LNG Liquefied natural gas receiving terminal according to claim 1, is characterized in that: described LNG storage tank is connected with described pressure regulation metering sled b by compressor.
3. the gasification system of LNG Liquefied natural gas receiving terminal according to claim 1, is characterized in that: described LNG storage tank is connected with cold insulation pipeline by output pump, and described cold insulation pipeline is connected with described unloading arm.
4. the gasification system of LNG Liquefied natural gas receiving terminal according to claim 1, is characterized in that: described storage cabin with return ship BOG compressor and be connected, described in return ship BOG compressor and be connected with described return-air arm a.
5. the gasification system of LNG Liquefied natural gas receiving terminal according to claim 1, is characterized in that: described storage cabin recycles compressor by BOG and is connected with BOG recycling unit.
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| CN201210159924.7A CN102654239B (en) | 2012-05-22 | 2012-05-22 | Gasifying system for liquefied natural gas receiving terminal |
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| CN201210159924.7A CN102654239B (en) | 2012-05-22 | 2012-05-22 | Gasifying system for liquefied natural gas receiving terminal |
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| CN102654239B true CN102654239B (en) | 2014-07-30 |
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Families Citing this family (6)
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| CN106287213B (en) * | 2016-10-11 | 2018-10-09 | 中国石油集团工程设计有限责任公司 | A kind of coastal waters offshore LNG receptions system and method |
| KR20180042937A (en) * | 2016-10-19 | 2018-04-27 | 대우조선해양 주식회사 | Liquefied Gas Regasification System and Operation Method |
| CN107228275A (en) * | 2017-05-26 | 2017-10-03 | 惠生（南通）重工有限公司 | It is a kind of can flexible combination and unattended floating LNG stocking systems |
| CN109140225A (en) * | 2018-09-05 | 2019-01-04 | 中国海洋石油集团有限公司 | A kind of LNG Distribution Center |
| CN109163216B (en) * | 2018-09-26 | 2024-02-09 | 苏州市创优净化科技有限公司 | Safe intelligent liquid ammonia vaporization system |
| CN111779967A (en) * | 2020-06-28 | 2020-10-16 | 中国寰球工程有限公司 | Wharf platform pipeline cold insulation system and method of offshore LNG receiving station |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Gas & Power Group Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Gas & Power Group Patentee before: China National Offshore Oil Corporation |
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