CN102654239A - Gasifying system for liquefied natural gas receiving terminal - Google Patents
Gasifying system for liquefied natural gas receiving terminal Download PDFInfo
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- CN102654239A CN102654239A CN2012101599247A CN201210159924A CN102654239A CN 102654239 A CN102654239 A CN 102654239A CN 2012101599247 A CN2012101599247 A CN 2012101599247A CN 201210159924 A CN201210159924 A CN 201210159924A CN 102654239 A CN102654239 A CN 102654239A
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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, in the time of the China's economic sustained and rapid development, ensure that the energy of economic development is but extremely in short supply.Rock gas only accounts for 4.4% in the primary energy consumption of China, well below world average level.Along with the continuous growth of country to energy demand, introduce LNG and will optimize energy resource structure effective solution energy supply safety, improve the ecological environment, realize that economic sustainable development with society plays a significant role.Therefore, Chinese in recent years LNG Liquefied natural gas (LNG) industry is fast-developing, and the LNG receiving terminal receives extensive concern.At present; The LNG resource is mainly from abroad obtaining; Need be domestic through the arrival of 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; Through 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 relatively poor; And receive surrounding enviroment and land resources limitations affect bigger; Especially in recent years the environmental consciousness of Along with people's strengthens, and is increasing in the restriction that coastal land construction receiving terminal receives.
In order to improve the narrow limitation of traditional land LNG receiving terminal; On the basis that takes into full account technical feasibility, Security, Economy; With the floating gasification vessel is that the floating LNG of carrier stores the gasification facility technology and moves to maturity gradually, have the construction period short, be seated advantages such as the sea has reduced the security risk of building the LNG receiving terminal in populous zone, flexibility is high, relative cost is low.But floating LNG stores gasification facility still exists its narrow limitation, and when environmental conditions was abominable, floating LNG stored gasification facility and can not normally move, and faced the danger of interrupting external air feed.When the gasification system of novel LNG receiving terminal stores all advantages of gasification facility except having had floating LNG among the present invention; Also have following characteristics: when the LNG ships that transport interrupts alongside and environmental conditions that harbour can not operation takes place makes the 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 through land LNG storage tank and auxiliary facility thereof is defeated outward, guarantees the continuity air feed; Storage cabin on the floating gasification vessel and land LNGLNG storage tank are subsequent use each other, have improved security of supply gas greatly.At the LNG receiving terminal project construction initial stage, under the little situation of user market prematurity, gas consumption, can go ahead of the rest and build land minor installation fast, seize market.
Summary of the invention
The gasification system that the purpose of this invention is to provide a kind of LNG Liquefied natural gas receiving terminal; It is long to be primarily aimed at conventional land Large LNG receiving terminal building time; Be difficult to satisfy the requirement that project is exploited market in earlier stage fast; Developed the receiving terminal system of a kind of offshore floating reception facilities and land reception facilities associating, not only satisfied quick requirements on 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;
Said floating gasification vessel module comprises the floating gasification vessel; Said floating gasification vessel is provided with at least 1 storage cabin; Be provided with in the said storage cabin and pour in down a chimney a pump and a jar interior pump; The said pump that pours in down a chimney is connected with the shipment arm, and said shipment arm is connected with unloading arm through the discharging house steward; Pump is connected with high-pressure service pump suction tank a, LNG high-pressure service pump a, LNG master's vaporizer a and pressure regulation metering sled a successively in said jar; The output terminal of said pressure regulation metering sled a is connected with pressurized gas gas transmission arm, and the output terminal of said pressurized gas gas transmission arm can be connected with gas distributing system through pipeline; Said storage cabin is connected with return-air arm a, and said return-air arm a is connected with return-air arm b through house steward BOG;
Said land module comprises the LNG storage tank; Said LNG storage tank is connected with said unloading arm and shipment arm through the discharging house steward; Said LNG storage tank is connected with said return-air arm b and return-air arm a through house steward BOG; Said LNG storage tank is connected with the LNG tank car through output pump.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system; Said LNG storage tank is connected with output pump, high-pressure service pump suction tank b, LNG high-pressure service pump b, LNG master's vaporizer b and pressure regulation metering sled b successively, and the output terminal of said pressure regulation metering sled b can be connected with the rock gas webmaster through pipeline; In when, environmental conditions that harbour can not operation taking place making that said floating gasification vessel must be freed departure from port or floating gasification vessel fault when; LNG in the land said LNG storage tank can realize outside the gaseous state defeated through said output pump, high-pressure service pump suction tank b, LNG high-pressure service pump b, LNG master's vaporizer b and the pressure regulation metering sled b that is equipped with on the bank; To guarantee the air feed continuity, this is provided with the connection that has realized floating gasification vessel and land LNG storage tank.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system; Said LNG storage tank is connected through compressor and said pressure regulation metering sled b, the BOG in the said LNG storage tank can be through said compressor pressurizes after to be delivered to land gas distributing system through pipeline together after the said pressure regulation metering sled b metering be user's air feed.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system, said LNG storage tank is connected with the cold insulation pipeline through output pump, said cold insulation pipeline is connected with said unloading arm; Do not have and unload ship time, the small flow LNG in the land said LNG storage tank can be delivered to harbour through said output pump, carries out the circulation of harbour cold insulation through said cold insulation pipeline.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system, said storage cabin with return ship BOG compressor and be connected, the said ship BOG compressor that returns is connected with said return-air arm a; When the underpressure of the BOG that produces in the said storage cabin, can pressurize through the said ship BOG compressor that returns earlier, be transported to said return-air arm a then.
Above-mentioned LNG Liquefied natural gas receiving terminal gasification system, said storage cabin utilizes compressor and BOG to recycle the unit through BOG to be connected again.
The invention has the beneficial effects as follows: the gasification system of this LNG receiving terminal is applicable to and requires to realize quick air feed and the coastal area Large LNG receiving station project high to the air feed safety requirement.At the LNG receiving terminal project construction initial stage; Under the little situation of user market prematurity, gas consumption; Can go ahead of the rest and utilize the floating gasification vessel fast and build land minor installation, can satisfy market fast and use the gas demand, after accomplishing the air feed target; But the towage of floating gasification vessel part 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, receive surrounding enviroment and narrow limitation such as the land resources limitations affect is big, flexibility is relatively poor; Help the quick construction and the operation of project; Simultaneously can solve floating gasification vessel fault with gasification facility through the LNG storage tank of land auxiliary construction again or the problem of the air feed interruption when freeing, realize continuous safe way.
Description of 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.
Each mark is following among the figure: 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, 15 LNG master's vaporizer b, 16 pressure regulation metering sledge b, 17 compressors, 18 cold insulation pipelines, 19 storage cabins, pump, 21 high-pressure service pump suction tank a, 22 LNG high-pressure service pump a, 23 LNG master's vaporizer a, 24 pressure regulation metering sledge a, 25 return ship BOG compressor in 20 jars, 26 BOG utilize compressor, 27 tank switching pumps, 28 again; 29 harbours, 30; 31; 32; 33,35 pipelines, 34 BOG recycle the unit.
Embodiment
Below in conjunction with accompanying drawing the present invention is further specified, 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 4 storage cabins 19 (only illustrating 1 among the figure); Be provided with in each storage cabin 19 and pour in down a chimney a pump 27 and a jar interior pump 20; Pour in down a chimney pump 27 and be connected with shipment arm 4 on being arranged on harbour 29 through pipeline 30, this shipment arm 4 is connected with unloading arm 2 through discharging house steward 3, and this unloading arm 2 is arranged on the harbour 28, and unloading arm 2 can be connected with LNG cargo ship 1; Pump 20 is connected with high-pressure service pump suction tank a21, LNG high-pressure service pump a22, LNG master's vaporizer a23 and pressure regulation metering sled a24 successively in jar; The output terminal of pressure regulation metering sled a24 is connected with pressurized gas gas transmission arm 10 through pipeline 32; The output terminal of this pressurized gas gas transmission arm 10 is connected with gas distributing system through 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 through pipeline 31; This return-air arm a9 is connected with return-air arm b8 on being arranged on harbour 28 through crossing house steward BOG 7, and return-air arm b8 is connected with LNG cargo ship 1; Storage cabin 19 utilizes compressor 26 and BOG recycling unit 34 to be connected through BOG again; Land module comprises LNG storage tank 6; This LNG storage tank 6 is connected through discharging house steward 3 and unloading arm 2 and shipment arm 4, and then LNG cargo ship 1 can be transported to LNG in the LNG storage tank 6, and LNG storage tank 6 is transported to LNG in the floating gasification vessel 5; LNG storage tank 6 is connected with return-air arm b and return-air arm a through house steward BOG 7, and then the BOG that produces in the LNG storage tank 6 can be delivered in LNG cargo ship 1 and the floating gasification vessel 5; LNG storage tank 6 is connected with LNG tank car 12 through output pump 11, can carry out the liquid outer defeated of LNG; This LNG storage tank 6 also is connected with high-pressure service pump suction tank b13, LNG high-pressure service pump b14, LNG master's vaporizer b15 and pressure regulation metering sled b16 through output pump 11 successively; Wherein the output terminal of pressure regulation metering sled b16 can be connected with gas distributing system through pipeline 33, is user's air feed; LNG storage tank 6 also is connected through compressor 17 and pressure regulation metering sled b16, so the BOG that produce in the LNG storage tank 6 after compressor 17 pressurizations are measured with pressure regulation metering sled b16, can be delivered to gas distributing system through pipeline 33 be user's air feed; LNG storage tank 6 also is connected with cold insulation pipeline 18 through output pump 11, and this cold insulation pipeline 18 is connected with unloading arm 2, does not unload ship time thereby have, and the small flow LNG in the 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.
Use the gasification system of above-mentioned LNG receiving terminal following as the process of user's air feed:
(1) after LNG cargo ship 1 arrives harbour 28; The LNG temperature of exporting on the cargo ship is about-160 ℃; Pressure is 0.45MPag; Part LNG is discharged into the storage cabin 19 on the floating gasification vessel 5 through the unloading arm on the harbour 28 2 to the shipment arm 4 that discharging house steward 3 passes through on the harbour 29 again through pipeline 30; The BOG that produces on the floating gasification vessel 5 is transported to return-air arm 9 through pipeline 31 when underpressure (if through returning 25 compressions of ship BOG compressor), passes through house steward BOG 7 again, return-air arm 8 is back to LNG cargo ship 1; Another part LNG is transported in the land LNG storage tank 6 to discharging house steward 3 through the unloading arm on the harbour 28 2, and the BOG that produces in the LNG storage tank 6 is back to LNG cargo ship 1 through the return-air arm 8 on the harbour 28 again through house steward BOG 7.LNG in the storage cabin 19 of floating gasification vessel 5 is forced into 0.5MPag by pump in the jar 20; Be delivered to the preceding high-pressure service pump suction tank a21 of LNG high-pressure service pump a22; Be gasificated into the rock gas more than 10 ℃ behind LNG after LNG high-pressure service pump a22 the is pressurized to 10MPag process LNG master vaporizer a23 again; Through pressure regulation metering sled a24 pressure is adjusted to 9MPag again and get into pipeline 32, it is user's air feed that rock gas is delivered to land gas distributing system through pressurized gas gas transmission arm 10 through pipeline 33.BOG in the land LNG storage tank 6 through compressor 17 pressurization after can be delivered to land gas distributing system through pipeline 33 together after the pressure regulation metering sled b16 metering be user's air feed; Also can be delivered to floating gasification vessel 5, mix after BOG utilizes compressor 26 compressions to get into BOG again through the BOG of pipeline 35 and 5 generations of floating gasification vessel then and recycle unit 34 through house steward BOG 7, return-air arm a9, pipeline 31.Nothing is unloaded the outer BOG that produces when operating that fails of ship time floating gasification vessel 5 normal gasifications and is utilized compressor 26 compressions to get into BOG recycling unit 34 again through BOG.LNG in the land LNG storage tank 6 is delivered to LNG tank car 12 through output pump 11, and this moment, LNG pressure reached 0.4MPag, and it is defeated outward to be used for the entrucking liquid state.Do not have and unload ship time, the small flow LNG in the 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 taking place can not operating condition floating gasification vessel 5 needing emergency release; LNG in the land LNG storage tank 6 is forced into 0.4MPag through output pump 11; Be delivered to the preceding high-pressure service pump suction tank b13 of land LNG high-pressure service pump b14, be forced into 10Mpag through land LNG high-pressure service pump b14 again, deliver to LNG master's vaporizer b15 gasification; Natural gas temperature after the gasification reaches more than 0 ℃, and pressure is to transport to gas distributing system outside the 9MPag entering pipeline 33 behind pressure regulation metering sled b16.
(3) when no extraneous LNG resource, if the LNG in the storage cabin of floating gasification vessel 5 19 is not enough, the LNG in the land LNG storage tank 6 is delivered in the storage cabin 19 of floating gasification vessel 5 through shipment arms 4 with harbour discharging house steward 3 through output pump 11; If the LNG in the land LNG storage tank 6 is not enough, the LNG in the storage cabin 19 of floating gasification vessel 5 can be forced into pipeline 30 through tank switching pump 27 and be transported to harbour discharging house steward 3 through shipment arm 4 again and finally be delivered in the land LNG storage tank 6.
Claims (6)
1. the gasification system of a LNG Liquefied natural gas receiving terminal, it is characterized in that: it comprises floating gasification vessel module and land module;
Said floating gasification vessel module comprises the floating gasification vessel; Said floating gasification vessel is provided with at least 1 storage cabin; Be provided with in the said storage cabin and pour in down a chimney a pump and a jar interior pump; The said pump that pours in down a chimney is connected with the shipment arm, and said shipment arm is connected with unloading arm through the discharging house steward; Pump is connected with high-pressure service pump suction tank a, LNG high-pressure service pump a, LNG master's vaporizer a and pressure regulation metering sled a successively in said jar; The output terminal of said pressure regulation metering sled a is connected with pressurized gas gas transmission arm, and the output terminal of said pressurized gas gas transmission arm can be connected with gas distributing system through pipeline; Said storage cabin is connected with return-air arm a, and said return-air arm a is connected with return-air arm b through house steward BOG;
Said land module comprises the LNG storage tank; Said LNG storage tank is connected with said unloading arm and shipment arm through the discharging house steward; Said LNG storage tank is connected with said return-air arm b and return-air arm a through house steward BOG; Said LNG storage tank is connected with the LNG tank car through output pump.
2. gasification system according to claim 1; It is characterized in that: said LNG storage tank is connected with output pump, high-pressure service pump suction tank b, LNG high-pressure service pump b, LNG master's vaporizer b and pressure regulation metering sled b successively, and the output terminal of said pressure regulation metering sled b can be connected with the rock gas webmaster through pipeline.
3. gasification system according to claim 2 is characterized in that: said LNG storage tank is connected with said pressure regulation metering sled b through compressor.
4. according to arbitrary described gasification system among the claim 1-3, it is characterized in that: said LNG storage tank is connected with the cold insulation pipeline through output pump, and said cold insulation pipeline is connected with said unloading arm.
5. according to arbitrary described gasification system among the claim 1-4, it is characterized in that: said storage cabin with return ship BOG compressor and be connected, the said ship BOG compressor that returns is connected with said return-air arm a.
6. according to arbitrary described gasification system among the claim 1-5, it is characterized in that: said storage cabin utilizes compressor and BOG recycling unit to be connected through BOG again.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106287213A (en) * | 2016-10-11 | 2017-01-04 | 中国石油集团工程设计有限责任公司 | A kind of coastal waters offshore LNG receives system and 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 |
| CN109163216A (en) * | 2018-09-26 | 2019-01-08 | 苏州市创优净化科技有限公司 | A kind of safety intelligent type liquid ammonia vaporization system |
| CN109891147A (en) * | 2016-10-19 | 2019-06-14 | 大宇造船海洋株式会社 | Liquefied gas regas system and its operating method |
| 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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| 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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| CN102654239B (en) | 2014-07-30 |
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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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