CN100451436C - Storage conveying method and device for liquiefied natural gas - Google Patents
Storage conveying method and device for liquiefied natural gas Download PDFInfo
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- CN100451436C CN100451436C CNB200510087796XA CN200510087796A CN100451436C CN 100451436 C CN100451436 C CN 100451436C CN B200510087796X A CNB200510087796X A CN B200510087796XA CN 200510087796 A CN200510087796 A CN 200510087796A CN 100451436 C CN100451436 C CN 100451436C
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Abstract
A distribution device of liquefied natural gas (LNG) is transportation vessel prepared by connecting transportation ship at back with LNG storage tank at front through connection and disconnection mechanism. Its distributing method includes unloading carried LNG tank and stopping it at LNG receiving terminal dock then making it be LNG storage tank of LNG receiving terminal, finally sending LNG from said tank to gasifying unit by output pump through pipeline to gasify LNG directly to user pipe.
Description
Technical field
The present invention is that transportation of LNG Liquefied natural gas water route and receiving terminal harbour unload a kind of LNG Liquefied natural gas conveying method and the equipment of fortune.Relate to transportation or storage device and the container technical field that is used for storing material or transportation.
Background technique
World energy sources consumption at present increases very fast, and wherein the consumption of rock gas and volume of trade increase rapidly especially.LNG Liquefied natural gas (LNG) volume of trade was about 1.1 hundred million tons in 2002, had accounted for 22% of global rock gas gross production.World LNG Trade amount in 2010 is given meter and will be risen to 1.8 hundred million tons.To account for 1/3 of gross production to the year two thousand twenty LNG volume of trade.And the staple market of LNG is in the Asia.Now become energy-consuming big country as China, along with population, consumption and economic growth, energy supply and demand contradiction will be outstanding further.It is predicted, will reach about 1.3 hundred million tons that wherein China will become the growth that attracts people's attention emerging market fast to the LNG volume of trade of the Asian-Pacific area in 2010.The quick increase of volume of trade, the accumulating of LNG also just become distinct issues.Cooling becomes liquid state because main component is rock gas temperature under standard pressure of methane (accounting for 90% usually) when dropping to-162.3 ℃ (260 °F), the later volume that liquefies only accounts for the about 1/600 of gas volume, therefore can realize the extensive storage and the transportation of rock gas more economically.Because the ultralow temperature characteristic of LNG, adopt remote pipeline transport almost cannot, the mode of special LNG cargo ship transportation is all adopted in therefore present global LNG transportation.In view of the above, the transportation of the water route of LNG normally by the boat-carrying LNG Liquefied natural gas to the on-site harbour of user, near harbour open field has the LNG receiving terminal, the LNG in the ship is transferred to the storage tank of receiving terminal by special pipeline, change LNG into natural gas by vaporization on the coast again, outwards flow to the end user by pipeline.Technically, the transportation ship of LNG and design, construction and the operation of receiving terminal have had very that mature technique supports, and its management and operation have also had a pattern of overlapping maturation.The LNG receiving terminal normally transports ship, harbour and handling facilities, cryogenic pipelines and valves, compressor, LNG storage tank (the general employing held jar entirely), vaporization facility (it is standby that seawater is vaporizated into main latent combustion formula), boil-off gas treatment device (natural gas compressor, after-condenser etc.), power generating equipment, central control room and some other supporting facility by several special LNG.Because the material that stores and transport is the ultralow temperature medium, and need airtight, therefore the LNG storage tank is required very high (generally adopting the 9Ni steel) with the material that contacts pipeline, one cover very strict design and operations specification are arranged simultaneously, level of security requires very high, and these have all caused whole LNG industry chain very worthy.With regard to the LNG receiving terminal, often make an investment in multi-billion dollar, as the LNG treating capacity be 5,000,000 tons/year receiving terminal gross investment greatly about about 1,000,000,000 dollars, wherein only the ground storage is irritated required expense and is just almost accounted for half.
According to existing LNG end process flow process and device situation, the LNG above-ground storage tank is the most crucial part of whole terminal, except that expending the huge fund construction, construction period also reaches 36 months usually, and take a large amount of land for buildings and need large-scale supporting facility, in addition, also be maximum potential safety hazard part in the operation process.And based on the construction of land LNG receiving terminal, because industry has thought that existing technological process has reached the limit that reduces construction cost and operating cost, and no longer include big room for improvement, in fact all both at home and abroad existing and all adopt this technological process at the LNG receiving terminal of building.After the LNG cargo ship pulls in to shore, by the pipeline of unloading a ship LNG is transported to land LNG storage tank, the LNG in the storage tank is transported to vaporizing unit through the one-level two stage pump and vaporizes, and is transported to the distribution network then outward.Auxiliary process comprises the handling process of LNG boil-off gas in the process of unloading a ship and the storage tank.In fact this technological process is quite complicated, loaded down with trivial details, and therefore brings long, big, the inefficient drawback of investment of LNG Liquefied natural gas receiving terminal construction period.
Summary of the invention
The objective of the invention is to invent a kind of economy, technological process safety, easy, LNG Liquefied natural gas conveying method and device efficiently.
The present invention with prior art the same also be by liquified natural gas carrier (LNGC) 13 with LNG Liquefied natural gas from the place of production or transfer transport to user's receiving terminal harbour, LNG Liquefied natural gas is input to sends into user pipe after receiving terminal is vaporized, but this method is the LNG storage tank with the LNG in the liquified natural gas carrier (LNGC) 13 storage cabin and receiving terminal to unite two into one, save land LNG storage tank, only store up the cabin with LNG.Specifically as shown in Figure 1: by liquified natural gas carrier (LNGC) 13 liquified natural gas tank jar 1 is separately unloaded the liquefied natural gas (LNG) tank that is docked in LNG Liquefied natural gas receiving terminal harbour double as LNG Liquefied natural gas receiving terminal, directly from liquified natural gas tank jar 1 by output pump 5 with LNG Liquefied natural gas access customer pipeline 12 after cryogenic piping 7 is sent into the vaporization of vaporization facility 6.This method requires to guarantee at least that a liquified natural gas tank jar 1 berths and follow-up liquified natural gas tank jar 1 is wanted last liquified natural gas tank jar 1 in harbour on the berth to arrive before being about to the outer LNG Liquefied natural gas of being totally lost to berth at the receiving terminal harbour, treats behind this liquified natural gas tank jar 1 defeated sky to be connected with the liquified natural gas tank jar 1 of unstowing by the cargo ship 13 that unloads liquified natural gas tank jar 1 to make a return voyage.And cargo ship 13 is looked different air routes situation with the connecting means of liquified natural gas tank jar 1 diverse ways can be arranged.If the little air route of stormy waves, that can adopt routine draws way with towboat.If stormy waves is general, liquified natural gas tank jar 1 can be connected in cargo ship 13 sides and drive, in a single day this kind method is slower because of the big headway of resistance of two ships, and meets high sea, and the impact of 1 pair of cargo ship 13 of liquified natural gas tank jar is big, poor stability.Should headway fast, the way that Security is good be connected as a single entity cargo ship 13 and liquified natural gas tank jar 1 rigidity exactly again, still becomes a ship.In order to guarantee that receiving terminal can provide rock gas to the user continuously, require the receiving terminal liquified natural gas tank jar 1 that will berth at least, in general with two the liquified natural gas tank jars 1 that berth for well, a transfusion rock gas outside receiving terminal, another is equipped with defeated.If two liquified natural gas tank jars 1 just in case can not berth simultaneously, the liquified natural gas tank jar 1 of transfusion rock gas is during 12～24 hours before being totally lost outside receiving terminal so, and follow-up liquified natural gas tank jar 1 required receiving terminal harbour berths to be equipped with and fails.Simultaneously, remove the boil-off gas treatment device of receiving terminal complexity and reduce pressure into the upper space that returns liquified natural gas tank jar 1 behind the normal pressure with natural gas line 8 reverse pumpings of the drain 9 that is connected with rock gas buffering storage tank 10 and makes progress, with the pressure of condition lng cabin jar 1 upper space by the rock gas after the vaporization.When defeated speed was fast outside the liquified natural gas tank jar 1, the rock gas deficiency of evaporation was so that the pressure of liquified natural gas tank jar 1 upper space reaches normal pressure, and the normal pressure rock gas through reducing pressure is replenished; And too much when liquified natural gas tank jar 1 top boil-off gas, can deposit rock gas buffering storage tank 10 when surpassing normal pressure in using it for anything else, just in case rock gas cushions storage tank 10 and deposits in excessively, also can light by drain 9 emptying.With the liquefied natural gas (LNG) tank that liquified natural gas tank jar 1 substitutes receiving terminal receiving terminal has not only been simplified the integrated artistic flow process greatly, and safer, efficient.Concerning cargo ship 13 only being and the separating and connectivity problem of liquified natural gas tank jar 1, but having saved two liquefied natural gas (LNG) tank, obviously is suitable.
By the harbour of the also the same cargo ship 13 that comprises LNG Liquefied natural gas of the used a kind of LNG Liquefied natural gas storage and transportation apparatus of above-mentioned LNG Liquefied natural gas conveying method, receiving terminal and handling facilities, output pump 5, vaporization facility 6, cryogenic piping 7 and other supporting facility with prior art.But this device as shown in Figure 1, the cargo ship 13 and the liquified natural gas tank jar on it 1 that are characterized in LNG Liquefied natural gas are split type, moor the liquefied natural gas (LNG) tank that substitutes receiving terminal in the liquified natural gas tank jar 1 of harbour, by immersed pump in the liquified natural gas tank jar 1 through LNG Liquefied natural gas delivery outlet 3, low temperature oil filling riser 2 is connected with cryogenic piping 7 output pumps 5 direct and before the vaporization facility 6, the output of vaporization facility 6 divides two-way, one the tunnel connects user pipe 12, one the tunnel connects decompressor 11, the output of this decompressor 11 is communicated with liquified natural gas tank jar 1 top through rock gas inlet opening 4 by natural gas line 8 one tunnel, one the tunnel connects rock gas buffering storage tank 10, also has one the tunnel to connect drain 9.This is to be used for the air pressure on condition lng cabin jar 1 top.When outside the liquified natural gas tank jar 1 during the transfusionization rock gas, its top can produce the space, and LNG Liquefied natural gas can gasify and enter this space.If defeated outward speed is slow, liquefied natural gas gasifying can make liquified natural gas tank jar 1 upper space keep malleation, if but defeated outward speed is fast and liquefied natural gas gasifying speed does not catch up with, will produce negative pressure at liquified natural gas tank jar 1 upper space, that yes is dangerous for this, and will be mended into liquified natural gas tank jar 1 top by the normal pressure rock gas that decompressor 11 produces this moment, makes it to keep normal pressure; Otherwise, will enter rock gas buffering storage tank 10 and store the usefulness of biding farewell in addition if liquified natural gas tank jar 1 top air pressure is higher than normal pressure, also be unable to hold as this rock gas buffering storage tank 10, just light by drain 9 emptying.And liquified natural gas tank jar 1 is the bindiny mechanism that is connected with cargo ship 13 is arranged and not have a ship shape liquefied natural gas (LNG) tank that drives power, direction controlling system and navigation system, and it is outer too to be surrounded by enough heat insulation layers.Method for cargo ship 13 dilatory liquified natural gas tank jar 1 ships, its device is respectively to establish at the stern of liquified natural gas tank jar 1 fore and cargo ship 13 to pull mechanism and be connected by connecting rod, the mechanism that pulls of cargo ship 13 tails is that the steel column top that is fixed on stern becomes the universal joint of substantially horizontal to be connected with connecting rod, connecting rod and liquified natural gas tank jar 1 ship fore connecting end are annulus, the mechanism that pulls of liquified natural gas tank jar 1 ship fore is the cyclization of rising that is fixed on fore, this cyclization of rising is a semi-ring on hinge connects on the ring seat that is fixed with following semi-ring, and last semi-ring has locking mechanism, cargo ship 13 stern devices have the equipment of lifting connecting rod, liquified natural gas tank jar 1 ship side has gangway ladder, so that about the operator.This kind Placement is worked as cargo ship 13 will pull liquified natural gas tank jar 1 ship time, by sling the cyclization of rising on connecting rod subtend liquified natural gas tank jar 1 ship of the hanging device on the cargo ship 13, make the annulus of connecting-rod cap be inserted in advance locked getting final product in the cyclization of rising of opening by the people.Though this Placement can be avoided the collision of liquified natural gas tank jar 1 ship to cargo ship 13, as high sea, liquified natural gas tank jar 1 ship is big to the influence of cargo ship 13, and is not too safe.Also inapplicable in sea-freight as for the Placement that hawser towboat commonly used in inland water transport and cargo ship 13 are arranged in liquified natural gas tank jar 1 sideband, the former Security is also poor, and latter's advance resistance is big, and headway is slow, and power consumption is big.Placement such as Fig. 2 preferably, shown in Figure 3, it is cargo ship 13 and the liquified natural gas tank jar 1 ship ship in aggregates that is rigidly connected, cargo ship 13 is made stern, liquified natural gas tank jar 1 is made fore, it specifically constitutes two kinds, the one, tack connects (see figure 2), be that cargo ship 13 is the plane with liquified natural gas tank jar 1 joint, its bindiny mechanism is on liquified natural gas tank jar 1 tail both sides and respectively there are vertical long connecting groove 14 (see figure 4)s the centre, its length is greater than the fully loaded difference with Light Draft of liquified natural gas tank jar 1, connecting groove 14 cross section (see figure 6)s become to open to the outside " mouth " font of osculum, and there are three connecting heads 15 position of three connecting grooves 14 of corresponding liquified natural gas tank jar 1 afterbody on the cargo ship 13 front end tack, this connecting head 15 is "T"-shaped, as shown in Figure 6 and Figure 7, it is the rectangular plate that is connected in a circular columns outer end, the minor face of this plate opening more outside than the connecting groove on the liquified natural gas tank jar 1 14 is narrow, there is screw thread at the cylinder rear portion, the termination becomes square toes, "T"-shaped connecting head 15 inserts precession hand wheel nut 18 behind the hole on the connecting head seat 16 outside cargo ship 13, cover one spanner 19 on the square end head; When 1 pair of company of cargo ship 13 and liquified natural gas tank jar, elder generation's rotary connecting joint 15 makes the narrow of connecting head 15 outer ends make connecting head 15 half-twists with spanner 19 again after aiming at connecting groove 14 and reeve, make connecting head 15 be stuck in 14 li of connecting grooves, tighten with hand wheel nut 18 at last, cargo ship 13 and liquified natural gas tank jar 1 tightly can be fixed together; Inverse operation got final product when cargo ship 13 separated with liquified natural gas tank jar 1.This bindiny mechanism is simple in structure, but cargo ship 13 just can only be transported liquified natural gas tank jar 1, and purposes is single, and cargo ship 13 displacement difficulty, also is difficult to navigation separately, because of its tack resistance too big.Second kind of Placement such as Fig. 3 are that cargo ship 13 still is complete ship, except fortune liquified natural gas tank jar 1 usefulness of also can biding farewell, also can be shifted easily even navigate by water separately.Concrete structure is that afterbody becomes the liquified natural gas tank jar 1 of " V " shape to be the ship predecessor, the cargo ship 13 of ship shape is the back body, cargo ship 13 fores enter in " V " mouth of liquified natural gas tank jar 1 afterbody during connection, two inner side surfaces at liquified natural gas tank jar 1 afterbody ogival and two forks also respectively have vertical long connecting groove 14 (see figure 5)s, the cross section (see figure 6) of this groove also is " mouth " font of outside little opening big in young, this three-flute cooperates with three "T"-shaped connecting heads 15 that 13 of the cargo ships and two sides of a ship are connected, cargo ship 13 is connected with liquified natural gas tank jar 1, and these 3 bindiny mechanisms all are that connecting head 15 (see figure 6)s enter into behind connecting groove 14 and the half-twist to be tightened by hand wheel nut 18 and are connected.The length of the long connecting groove 14 on the liquified natural gas tank jar 1 depends on that liquified natural gas tank jar 1 is fully loaded with and the difference of Light Draft, and this difference generally has several meters, and what have may be longer.Why will so grow is exactly to guarantee no matter liquified natural gas tank jar 1 is fully loaded or zero load, and connecting head 15 all can enter to be implemented in the connecting groove 14 to connect.If but cargo ship 13 is when being 1 load or unload of liquified natural gas tank jar with liquified natural gas tank jar 1 when coupled condition, drinking water is in continuous variation, so this moment, connecting head 15 will be unscrewed, so that connecting head 15 in connecting groove 14 along with the drinking water variation and slide up and down, once fill or unsnatch again and tighten.For the cargo ship 13 that guarantees two kinds of Placements safety with liquified natural gas tank jar 1 connection procedure, metal bump does not take place, the outer half section appearance of rectangular steel plate that exposes at connecting head 15 and circular columns is all topped separation layer 17, and it can be plastics, plastic cement or rubber.The decompressor 11 of condition lng cabin jar 1 upper space pressure is decompressor or reduction valve commonly used.Owing to the LNG Liquefied natural gas that will store-162 ℃, its structure is the same with prior art, also needs the enough thick heat insulation layer and the shell of anticollision, just repeats no more at this as for liquified natural gas tank jar 1.
Description of drawings
The receiving terminal of a kind of LNG Liquefied natural gas accumulating of Fig. 1 constitutes and process flow diagram
Fig. 2 cargo ship and liquified natural gas tank jar tack connection diagram
Fig. 3 cargo ship and liquified natural gas tank jar fork-shaped connection diagram
The connecting groove key plan that Fig. 4 tack connects
The connecting groove key plan that Fig. 5 fork-shaped connects
The connection diagram of Fig. 6 connecting head and connecting groove
Fig. 7 connecting head structural drawing
1-liquified natural gas tank jar 2-low temperature oil filling riser wherein
3-LNG Liquefied natural gas delivery outlet 4-rock gas inlet opening
The 5-output pump 6-facility of vaporizing
7-cryogenic piping 8-natural gas line
9-drain 10-rock gas buffering storage tank
11-decompressor 12-user pipe
13-cargo ship 14-connecting groove
15-connecting head 16-connects headstock
17-separation layer 18-hand wheel nut
The 19-spanner
Embodiment
Embodiment. this example is for can deliver a kind of LNG Liquefied natural gas conveying method and the device thereof of 10 ten thousand stere LNG Liquefied natural gas.Cargo ship 13 and liquefied natural gas (LNG) tank 1 are for tack is connected, and after being connected as a single entity, cargo ship 13 is made the lower body of whole ship, and liquefied natural gas (LNG) tank 1 is made the preceding half body (as Fig. 2) of whole ship.Liquefied natural gas (LNG) tank 1 long 200m, wide 30m, high 22m, conduct oneself with dignity 10,000 tons, fully loaded and Light Draft difference is 16m, cargo ship 13 long 50m, wide 30m, high 15m, absorb water dark 10m, cargo ship 13 is the plane with liquefied natural gas (LNG) tank 1 junction surface, the connecting groove 14 (as shown in Figure 4) that one vertical long 8.5m is respectively arranged at the vertical center line of liquefied natural gas (LNG) tank 1 junction surface and two back gauge gun wale 2m places, the cavity size of slot cross-section (see figure 6) is 600 * 300mm, the outside wide 200mm of the opening line of rabbet joint, the thick 100mm of trough rim; At the vertical center line of cargo ship 13 front end junction surfaces apart from boat deck 6m place and two back gauge gun wale 2m, apart from deck on the ship 6m place one connecting head 15 is arranged respectively, this connecting head 15 (as shown in Figure 7) is at Φ 180mm, long 400mm steel column external end head weld one 180 * 400 * 100mm bloom "T"-shaped and outside it thick rubber of topped 30mm of having, at the connecting head 15 latter half of screw threads that long 160mm is arranged, tail end has long 40mm, the square toes of 120 * 120mm, connecting head 15 is from being connected in the Φ 210mm of the connecting base 16 on cargo ship 13 junction surfaces, long 200mm pierces in the hole back by external diameter 500mm, the hand wheel nut 18 of hub diameter 250mm screws in, and the spanner 19 of connecting head tail end is long 400mm, wide 100mm, thick 20mm steel plate two ends angle lap and root center have 120 * 120mm square hole to cooperate with the square toes of connecting head tail end.Connect a bypass tube to decompressor 11 in 6 outputs of vaporization facility, decompressor 11 output through one 4 logical route natural gas tube 8 through the rock gas inlet opening 4 to liquified natural gas tank jar 1 top, one the tunnel connects the rock gas buffering storage tank 10 to 100 cubic metres, also has one the tunnel to connect to drain 9.So 1 two of liquefied natural gas (LNG) tank are joined a cargo ship, the harbour that cargo ship 13 is transported to receiving terminal with a liquified natural gas tank jar 1 berths, return connects a liquified natural gas tank jar 1 of unsnatching LNG Liquefied natural gas and arrives the can of the LNG Liquefied natural gas place of production again, remain 1～2 liquified natural gas tank jar 1 at the receiving terminal harbour, one by output pump 5 by LNG Liquefied natural gas delivery outlet 3, low temperature oil filling riser 2 and cryogenic piping 7 to vaporization facility 6 transportation of liquefied natural gas, another is equipped with defeated, guarantees outer incessantly transfusionization rock gas.Liquified natural gas tank jar 1 if only berth, must this liquified natural gas tank jar 1 from outside the LNG Liquefied natural gas of being totally lost also have in 12～24 hours cargo ship 13 follow-up liquified natural gas tank jar 1 will be transported to and berth to be equipped with defeated.In a word, should make the receiving terminal harbour that liquified natural gas tank jar 1 transfusion rock gas is outward arranged all the time, guarantee uninterruptedly, make cargo ship 13 very fast can connection behind the receiving terminal harbour go up the liquified natural gas tank jar 1 that oneself unstows and make a return voyage again.This wherein has production scheduling to want correct problem certainly.
Adopt the inventive method and device that following advantage is arranged: (1) reduces the construction and the running cost of LNG receiving terminal, owing to do not need to build on land jar, thereby can significantly reduce the terminal station land surface, and can be with vaporization facility 6 near harbour, reduce the length of pipeline of unloading a ship greatly, and the expense of marine storage tank also is significantly less than the expense that jar is built on land, and whole cost can be saved more than 20%; (2) reduce greatly the LNG receiving station construction period, because the construction period of jar is generally at 36 months, it is the longest construction project of spended time, and the construction period in LNG storage cabin is the construction period of LNG cargo ship just basically also, and after the LNG ship power is partly built up, only need to build LNG storage cabin, can also store up the cabin as LNG by the existing LNG cargo ship of straight lease early stage in operation; (3) utilize prior art just can accomplish, do not need extra technological development and research, do not need additionally to increase main equipment and facility yet, no longer need after-condenser, reflux drum blower fan, the such equipment of boil-off gas compressor on the contrary, to LNG vaporization and outer defeated without any influence; (4) avoided dangerous secondary unloading, in the past LNG cargo ship 13 after, LNG storage tank from the ship need be transferred to shore tank, enter vaporization facility 6 from shore tank again, and adopt our rule directly LNG to be transported to vaporization facility 6 from the storage tank that floats, implement also more convenient flexible; (5) avoided the LNG circulation cold insulation process that keeps low temperature to carry out for the pipeline that guarantees to unload a ship; (6) processing of boil-off gas is simpler, and the amount of boil-off gas is little, and the source of boil-off gas is only at LNG storage cabin, the situation that boil-off gas rolls up when having avoided unloading a ship, the dangerous situation of shore tank contingent when charging " rolling " before also not existing in the past.
Therefore the inventive method is very simple, installs also uncomplicatedly, and just the cargo ship 13 with former integral body makes split into, and than having howed bindiny mechanism originally, and this bindiny mechanism is simple, reliable, and the operation that connects and separate also is easy to.And liquified natural gas tank jar 1 body there is no special variation.But its effect is very obvious, makes receiving terminal save the construction of liquefied natural gas (LNG) tank and auxiliary facility thereof, has both saved investment, has shortened the construction period of receiving terminal again, and reduces the operating cost of receiving terminal.Generally speaking can improve the efficient that LNG Liquefied natural gas stores and transports greatly, be a kind of safety, economy, high-efficiency method.
Claims (7)
1. LNG Liquefied natural gas conveying method, comprise will load cabin on it by cargo ship [13] LNG Liquefied natural gas from the place of production or transfer transport to the harbour of user's receiving terminal, LNG Liquefied natural gas is input to sends into user pipe [12] after receiving terminal is vaporized, it is characterized in that the liquified natural gas tank jar [1] of its delivery being unloaded the harbour double as LNG Liquefied natural gas receiving terminal storage tank that is docked in receiving terminal, directly by output pump [5] LNG Liquefied natural gas is sent into vaporization facility [6] vaporization access customer pipeline [12] through cryogenic piping [7] from liquified natural gas tank jar [1] by cargo ship [13].
2. a kind of LNG Liquefied natural gas conveying method according to claim 1 is characterized in that at LNG Liquefied natural gas receiving terminal liquified natural gas tank jar [1] top boil-off gas regulating method being: return liquified natural gas tank jar [1] upper space by the pipeline reverse pumping of the drain [9] that is connected with rock gas buffering storage tank [10] and makes progress after the natural gas via after the receiving terminal vaporization is reduced pressure into normal pressure.
3. a kind of LNG Liquefied natural gas storage and transportation apparatus by the described LNG Liquefied natural gas conveying method of claim 1, the cargo ship [13] that comprises LNG Liquefied natural gas, the harbour of receiving terminal and handling facilities, vaporization facility [6], cryogenic pipelines [7], valve, central control room and other supporting facility, it is characterized in that cargo ship [13] and the liquified natural gas tank jar [] on it] for split type, moor the liquified natural gas tank jar [1] that unloads by cargo ship [13] in LNG Liquefied natural gas receiving terminal harbour and substitute the liquefied natural gas (LNG) tank of LNG Liquefied natural gas receiving terminal, directly be connected through cryogenic piping [7] by the immersed pump in the liquified natural gas tank jar [1] with the preceding output pump [5] of facility [6] of vaporizing, vaporization facility [6] output one tunnel connects user pipe [12], one the tunnel connects a decompressor [11], take back the top of liquified natural gas tank jar [1] by natural gas line [8] and rock gas inlet opening [4], and natural gas line [8] connects rock gas buffering storage tank [10] and upwards is connected to drain [9].
4. a kind of LNG Liquefied natural gas storage and transportation apparatus according to claim 3, it is characterized in that liquified natural gas tank jar [1] for the ship shape liquefied natural gas (LNG) tank of the bindiny mechanism that is connected with cargo ship [13] is arranged, is surrounded by enough thick heat insulation layer outside this liquified natural gas tank jar [1].
5. according to claim 3 or 4 described a kind of LNG Liquefied natural gas storage and transportation apparatus, it is characterized in that respectively establishing and pull mechanism and be connected by connecting rod at the fore of liquified natural gas tank jar [1] ship and the stern of cargo ship [13], the mechanism that pulls of cargo ship [13] stern is that the steel column top that is fixed on stern becomes the universal joint of substantially horizontal to be connected with connecting rod, connecting rod and liquified natural gas tank jar [1] ship fore connecting end are annulus, the mechanism that pulls of liquified natural gas tank jar [1] ship fore is the cyclization of rising that is fixed on fore, this cyclization of rising is that the ring seat upper hinge of semi-ring connects semi-ring being fixed with down, and upward semi-ring has locking mechanism; Cargo ship [13] stern device has the equipment of lifting connecting rod, and liquified natural gas tank jar [1] ship side has gangway ladder.
6. according to claim 3 or 4 described a kind of LNG Liquefied natural gas storage and transportation apparatus, the cargo ship [13] that it is characterized in that LNG Liquefied natural gas is the ship in aggregates that is rigidly connected with liquified natural gas tank jar [1] ship, the cargo ship of LNG Liquefied natural gas [13] is made the ship lower body of whole ship, liquified natural gas tank jar [1] is made the preceding half body of ship, the cargo ship of LNG Liquefied natural gas [13] is the plane with liquified natural gas tank jar [1] joint, bindiny mechanism is three connecting heads [15] on the cargo ship [13] of LNG Liquefied natural gas and three connecting grooves [14] on the liquified natural gas tank jar [1], connecting head [15] is positioned at the centre and the both sides of cargo ship [13] junction surface of LNG Liquefied natural gas, it is that a rear portion has screw thread and tail end to become be connected a rectangular steel plate and be coated with separation layer [17] in periphery of the round bar front end of square toes, pierce into the back the slotted hole of the connection headstock [16] of connecting head [15] afterbody from cargo ship [13] junction surface that is fixed on LNG Liquefied natural gas and screw in hand wheel nut [18], on the tail end square toes of connecting head [15], connect a spanner [19]; On liquified natural gas tank jar [1] junction surface corresponding, a vertical long connecting groove [14] is arranged respectively with the last joint among three members [15] of the cargo ship [13] of LNG Liquefied natural gas, the cross section of connecting groove [14] is " mouth " shape to the external-open osculum, the width of notch is more bigger than the minor face of connecting head [15] end, and the more fully loaded drinking water difference with zero load than liquified natural gas tank jar [1] of the length of connecting groove [14] is slightly long; During connection, rotary connecting joint [15] enters in the connecting groove [14] its narrow limit, and [15] 90 ° of rectangular integrated circuit boards that make connecting head [15] end of rotary connecting joint are in connecting groove [14] lining again, and the back is tightened by hand wheel nut [18].
7. according to claim 3 or 4 described a kind of LNG Liquefied natural gas storage and transportation apparatus, the cargo ship [13] that it is characterized in that LNG Liquefied natural gas is the ship in aggregates that is rigidly connected with liquified natural gas tank jar [1] ship, it is the ship predecessor that afterbody becomes the liquified natural gas tank jar of " V " shape, the cargo ship of ship shape is the back body, the transportation fore of LNG Liquefied natural gas enters in " V " mouth of liquified natural gas tank jar [1] afterbody during connection, at the ogival of liquified natural gas tank jar [1] afterbody and two inner side surfaces of two forks one vertical long connecting groove [14] is arranged respectively, the cross section of this connecting groove [14] is " mouth " font to the external-open osculum, and the more fully loaded difference with Light Draft than liquified natural gas tank jar [1] of the length of connecting groove [14] is slightly long; On the position of connecting groove [14] on cargo ship [13] fore ogival and corresponding liquified natural gas tank jar [1] junction surface of anterior two outboards, a connecting head [15] is arranged respectively, this connecting head [15] is that a rear portion has screw thread and termination to become be connected a rectangular steel plate and be coated with separation layer [17] in its appearance of the round bar front end of square toes, be screwed into hand wheel nut [18] after piercing into the slotted hole of the connection headstock [16] of connecting head [15] on being connected in cargo ship [13] body, on the square toes of connecting head [15] bar tail end head, connect a spanner [19]; Cargo ship and liquified natural gas tank jar [1] be when being connected, and connecting head [15] narrow to inserting connecting groove [14] back half-twist screws hand wheel nut [18].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510087796XA CN100451436C (en) | 2005-08-10 | 2005-08-10 | Storage conveying method and device for liquiefied natural gas |
Applications Claiming Priority (1)
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| CNB200510087796XA CN100451436C (en) | 2005-08-10 | 2005-08-10 | Storage conveying method and device for liquiefied natural gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102242864A (en) * | 2011-03-21 | 2011-11-16 | 益资海洋工程技术(北京)有限公司 | Liquefied natural gas (LNG) receiving system and treatment method |
| CN102314173A (en) * | 2011-06-10 | 2012-01-11 | 武汉富高流体控制系统工程有限公司 | Liquid cargo control system of liquefied gas carrier |
| CN102322567B (en) * | 2011-09-09 | 2013-01-16 | 中国寰球工程公司 | Liquefied natural gas ship-unloading and ship-loading system and ship-loading method |
| FR3074254B1 (en) * | 2017-11-24 | 2021-06-04 | Engie | DEVICE AND METHOD FOR SUPPLYING LIQUEFIED NATURAL GAS |
| CN109915731B (en) * | 2019-04-02 | 2024-01-26 | 中国石油工程建设有限公司 | Pressure protection system and method for large-drop liquefied petroleum gas pipeline |
| CN113309920B (en) * | 2021-05-10 | 2023-06-20 | 安徽省环境科学研究院 | High-contact thermal power plant utilizes LNG to carry out carbon collection system |
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| JP2001004271A (en) * | 1999-06-22 | 2001-01-12 | Iwatani Internatl Corp | System for producing liquefied gas |
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| JP2001004271A (en) * | 1999-06-22 | 2001-01-12 | Iwatani Internatl Corp | System for producing liquefied gas |
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