CN202733447U - Cooling system for ship unloading pipeline of liquefied natural gas receiving station - Google Patents
Cooling system for ship unloading pipeline of liquefied natural gas receiving station Download PDFInfo
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- CN202733447U CN202733447U CN 201220377238 CN201220377238U CN202733447U CN 202733447 U CN202733447 U CN 202733447U CN 201220377238 CN201220377238 CN 201220377238 CN 201220377238 U CN201220377238 U CN 201220377238U CN 202733447 U CN202733447 U CN 202733447U
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Abstract
The utility model discloses a cooling system for a ship unloading pipeline of a liquefied natural gas (LNG) receiving station. The cooling system adopts the structure that a reserved port of a reserved storage tank feeding pipeline is arranged at the blind end of the ship unloading pipeline, the length of the blind end is larger than 30m, and a second valve is arranged in front of the reserved port of the reserved storage tank feeding pipeline; an LNG storage tank feeding pipeline is connected between the ship unloading pipeline with the blind end of 30m in length and an LNG storage tank, and a first valve is arranged on the LNG storage tank feeding pipeline; one end of a first mixing overline is connected with the reserved port of the reserved storage tank feeding pipeline, the other end is connected with a low-pressure output main pipe, and a third valve is arranged on the first mixing overline; a second mixing overline is connected between the low-pressure output main pipe and the LNG storage tank feeding pipeline, and a fourth valve is arranged on the second mixing overline; and when low-temperature gas on a ship is utilized to cool down the ship unloading pipeline, the first valve is in the closed state, and the second valve, the third valve and the fourth valve are in an open state.
Description
Technical field
The utility model relates to the LNG Liquefied natural gas field, in particular to the unload a ship cooling system of pipeline of a kind of LNG Liquefied natural gas receiving station.
Background technique
LNG Liquefied natural gas (LNG, Liquefied Natural Gas) is a kind of high-grade energy, has calorific value height, the little characteristics of combustion pollution.The major function of LNG receiving station is to receive the LNG that transport by sea comes, and it is stored and gasifies, and obtains the gaseous natural gas product, and by gas distributing system to power plant and gas user air feed.LNG Liquefied natural gas receiving station generally includes LNG discharge system, LNG stocking system, boil-off gas (BOG, Boil Off Gas) processing system, LNG transporting system, LNG gasification system, Utilities and auxiliary system.Therefore, LNG receiving station all builds near the harbour of Large LNG cargo ship of can berthing, be provided with LNG arm and the LNG pipeline of unloading a ship of unloading a ship in the LNG Liquefied natural gas receiving station, after the LNG cargo ship arrives the single user wharf of LNG receiving station, the LNG of the receiving station arm of unloading a ship is connected the discharging header and is connected with the LNG cargo ship, start the LNG discharging pump on the ship, LNG will be unloaded to the LNG storage tank of receiving station in the transportation cabin body by unload a ship arm and the pipeline of unloading a ship of LNG, realize the uninstall process of LNG.
Construction is arranged different at total figure of the LNG of different location receiving station, the LNG arm of unloading a ship is installed on the single user wharf of LNG receiving station, distance between unloading wharf and the LNG storage tank normally hundreds of rice to several kms does not wait, LNG unloads a ship pipeline after receiving station puts into operation, be in the low temperature cold conditions always, but in its process of construction, be in the normal temperature state, when coming into operation first, it need to be cooled to the state of low temperature (-160 ℃ approximately) from the normal temperature state, the pipeline general size very large (being generally between the 25cm to 105cm) because LNG unloads a ship, the process that cools first is very crucial, therefore, how rationally control and as far as possible its cooling of realization within the shortest time become technological difficulties in the engineering design of LNG receiving station.
Unload a ship the first cooling great majority of pipeline of LNG receiving station are divided into following two steps and carry out: (1) adopts the cryogenic gas (-140 ℃ approximately) on the ship tentatively to cool off, cryogenic gas enters leaving wharf LNG storage tank farthest, the low cooling so that the whole pipeline of unloading a ship is tried one's best (, generally being cooled to-100 ℃ depending on the length of pipeline of unloading a ship); (2) the LNG small flow on the ship enters the pipeline of unloading a ship, so that it further is cooled to-150 ℃ approximately.The present LNG receiving station cooling case of pipeline " with longer cecum " that when driving, also do not occur unloading a ship, if to the cooling of the pipeline of unloading a ship of " with longer cecum " use with not with the identical mode of the cooling of the pipeline of unloading a ship of " longer cecum ", the pipeline upper and lower surface temperature difference will in second step, occur and surpass 50 ℃ and make the danger of pipeline arch camber, particularly make the temperature drop of pipeline surpass scope of design, make the cooling progress of the whole pipeline of unloading a ship be difficult to control.
The model utility content
The cooling system that the utility model provides a kind of LNG Liquefied natural gas receiving station to unload a ship pipeline is in order to realize the cooling program of work to the pipeline of unloading a ship with longer cecum.
For achieving the above object, the cooling system that the utility model provides a kind of LNG Liquefied natural gas receiving station to unload a ship pipeline, it comprises: have length greater than the pipeline of unloading a ship, LNG storage tank feeding line, LNG storage tank, reservation storage tank feeding line, the first valve, the second valve, the 3rd valve, the 4th valve, the first mixing cross-line and the second mixing cross-line of the cecum of 30m, wherein
The reserved opening of reserving storage tank (this storage tank this time is not cooled) feeding line is arranged on has length greater than the cecum of the pipeline of unloading a ship of the cecum of 30m, and the second valve is arranged on before the reserved opening of reserving the storage tank feeding line;
LNG storage tank feeding line is connected to has length greater than the unloading a ship between pipeline and the LNG storage tank of the cecum of 30m, and the first valve is arranged on the LNG storage tank feeding line;
First end that mixes cross-line is connected with the reserved opening of this reservation storage tank feeding line of not going into operation, and its other end is connected with the low pressure delivery trunk, and the 3rd valve is arranged on first to be mixed on the cross-line;
Second mixes cross-line is connected between low pressure delivery trunk and the LNG storage tank feeding line, and the 4th valve is arranged on second to be mixed on the cross-line;
Wherein, when the cryogenic gas on utilizing ship cooled off the pipeline of unloading a ship, the first valve was in closed condition, and the second valve, the 3rd valve and the 4th valve are in opening state.
Better, the first downstream of mixing cross-line is provided with blind plate, and the first downstream of mixing cross-line is connected with follow-up pipeline, is provided with plate on the follow-up pipeline.
For achieving the above object, the cooling system that the utility model also provides a kind of LNG Liquefied natural gas receiving station to unload a ship pipeline, it comprises: have length greater than the pipeline of unloading a ship, LNG storage tank feeding line, LNG storage tank, the reserved opening of reserving the storage tank feeding line, the first valve, the second valve, the 3rd valve, the 4th valve and the interim pipeline of the cecum of 30m, wherein
The reserved opening of reserving the storage tank feeding line is arranged on has length greater than the cecum of the pipeline of unloading a ship of the cecum of 30m, and the second valve is arranged on before the reserved opening of reserving the storage tank feeding line;
LNG storage tank feeding line is connected to has length greater than the unloading a ship between pipeline and the LNG storage tank of the cecum of 30m, and the first valve is arranged on the LNG storage tank feeding line;
One end of interim pipeline is connected with the reserved opening of reserving the storage tank feeding line, and its other end is connected with the emptying pipeline, and the 3rd valve and the 4th valve are arranged on the two ends of interim pipeline;
The emptying pipeline is connected with LNG storage tank feeding line;
Wherein, the size of emptying pipeline is greater than 15cm, the size of interim pipeline is not less than 15cm, have length greater than the joint perforate of the pipeline of unloading a ship of the cecum of 30m, emptying pipeline and interim pipeline and be provided with the Subzero valve identical with interim line size, when the cryogenic gas on utilizing ship cools off the pipeline of unloading a ship, the first valve is in closed condition, and the second valve, the 3rd valve and the 4th valve are in opening state, and emptying line downstream side valve door is in closed condition.
Better, above-mentioned cooling system also comprises: the second interim pipeline, the one end with have the cecum of length greater than the pipeline of unloading a ship of the cecum of 30m and be connected, its other end is connected with the emptying pipeline, the two ends of the second interim pipeline are provided with the 5th valve and the 6th valve.
For achieving the above object, the cooling system that the utility model also provides a kind of LNG Liquefied natural gas receiving station to unload a ship pipeline, it comprises: have length greater than the pipeline of unloading a ship, LNG storage tank feeding line, LNG storage tank, reservation storage tank feeding line, the first valve, the second valve, the 3rd valve, the 4th valve, the 5th valve, the 6th valve and the interim pipeline of the cecum of 30m, wherein
The reserved opening of reserving the storage tank feeding line is arranged on has length greater than the cecum of the pipeline of unloading a ship of the cecum of 30m, and the second valve is arranged on before the reserved opening of reserving the storage tank feeding line;
LNG storage tank feeding line is connected to has length greater than the unloading a ship between pipeline and the LNG storage tank of the cecum of 30m, and the first valve is arranged on the LNG storage tank feeding line;
One end of interim pipeline with have the cecum of length greater than the pipeline of unloading a ship of the cecum of 30m and be connected, its other end is connected with house steward BOG, the 3rd valve and the 4th valve are arranged on the two ends of interim pipeline;
House steward BOG is connected with the LNG storage tank, and the 5th valve is arranged on house steward BOG near an end of LNG storage tank, and the 6th valve is arranged on house steward's BOG the other end;
When the cryogenic gas on utilizing ship cooled off the pipeline of unloading a ship, the first valve and the 6th valve were in closed condition, and the second valve, the 3rd valve, the 4th valve and the 5th valve are in opening state.
Above-described embodiment can make to have length and greater than the line temperature of unloading a ship of the cecum of 30m enough reductions is arranged, and can make when introducing LNG that the pipeline of unloading a ship is whole evenly to descend, and has realized the cooling program of work to the pipeline of unloading a ship with longer cecum.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is LNG Liquefied natural gas receiving station with the longer cecum pipeline schematic representation of unloading a ship;
Fig. 2 is the unload a ship cooling system structure schematic representation of pipeline of the utility model the first embodiment's LNG Liquefied natural gas receiving station;
Fig. 3 is the unload a ship cooling system structure schematic representation of pipeline of the utility model the second embodiment's LNG Liquefied natural gas receiving station;
Fig. 4 is the cooling system structure schematic representation of the pipeline of unloading a ship according to the utility model the 3rd embodiment's LNG Liquefied natural gas receiving station.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not paying the every other embodiment who obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is LNG Liquefied natural gas receiving station with the longer cecum pipeline schematic representation of unloading a ship; Among Fig. 1 101 for having the pipeline of unloading a ship of grow (length is greater than 30m) cecum (its right side is the pipeline of unloading a ship from quay side, its left side is the cecum of the pipeline of unloading a ship), 102 for the reserved opening of this LNG storage tank feeding line of not going into operation, 103 for possessing the LNG storage tank of LNG condition of acceptance, 104 is LNG storage tank feeding line, and 1,2 are valve.The pipeline of unloading a ship is used for reserving LNG storage tank interface in the future with long cecum most cases, and the reservation situation as shown in Figure 1.
For above-mentioned situation, can there be a plurality of schemes that this cecum is destroyed, so that whole pipeline the cooling down in steps of unloading a ship.Wherein, to the cooling of the pipeline of unloading a ship with " longer cecum ", not only comprise LNG among the utility model embodiment, also comprise liquid ethylene, LPG(liquefied petroleum gas (LPG)), the cooling of the pipeline of unloading a ship of liquefied ammonia and other cryogenic liquide.
Fig. 2 is the unload a ship cooling system structure schematic representation of pipeline of the utility model the first embodiment's LNG Liquefied natural gas receiving station; As shown in the figure, this cooling system comprises: have length greater than the pipeline 101 of unloading a ship, LNG storage tank feeding line 104, LNG storage tank 103, the reserved opening 102 of reserving the storage tank feeding line, the first valve 1, the second valve 2, the 3rd valve 3, the 4th valve 4, the first mixing cross-line 201 and the second mixing cross-line 203 of the cecum of 30m, wherein
The reserved opening 102 of reserving the storage tank feeding line is arranged on has length greater than the cecum of the pipeline 101 of unloading a ship of the cecum of 30m, and the second valve 2 is arranged on the reserved opening 102 close LNG storage tank sides that are about to go into operation (blind plate being set near reserving LNG storage tank side) of reserving the storage tank feeding line;
LNG storage tank feeding line 104 is connected to has length greater than the unloading a ship between pipeline 101 and the LNG storage tank 103 of the cecum of 30m, and the first valve 1 is arranged on the LNG storage tank feeding line 104;
First end that mixes cross-line 201 is connected with the reserved opening 102 of reserving the storage tank feeding line, and its other end is connected with low pressure delivery trunk 202, and the 3rd valve 3 is arranged on first to be mixed on the cross-line 201;
Utilize when cryogenic gas cools off the pipeline of unloading a ship on the ship, cut-off valve 1, while open valve 2, valve 3 and valve 4, cryogenic gas will enter low pressure delivery trunk (its valve downstream is closed) through the mixing cross-line that this " longer cecum " enters as later stage reservation LNG storage tank, the mixing cross-line that turns back to the storage tank in early stage enters the LNG storage tank feeding line of the LNG storage tank of " having possessed the LNG condition that receives " again, enters the LNG storage tank again.This process can make the whole piece of " with the longer cecum " pipeline of unloading a ship be cooled to as far as possible low in controlled range by cryogenic gas.
For example, reserve the storage tank feeding line and be provided with blind plate with the described first intersection point downstream of mixing cross-line, the close storage tank side of reserving of mixing the cross-line intersection point with the low pressure delivery trunk with described first also is provided with plate (it is to reserve tank and the regional strict physical isolation that will go into operation that the plate purpose is set, in order to avoid inflammable gas enters unexpected LNG storage tank or system's cause danger).
Below be the cooling means of the pipeline of unloading a ship according to Fig. 2 embodiment's LNG Liquefied natural gas receiving station, may further comprise the steps:
Close the first valve 1, open simultaneously the second valve 2, the 3rd valve 3 and the 4th valve 4, wherein, the first valve 1 is arranged on to be connected to have on the LNG storage tank feeding line 104 between pipeline 101 and the LNG storage tank 103 of unloading a ship of length greater than the cecum of 30m, the second valve 2 is arranged on before the reserved opening 102 of reserving the storage tank feeding line, the reserved opening 102 of reserving the storage tank feeding line is arranged on has length greater than the cecum of the pipeline 101 of unloading a ship of the cecum of 30m, the 3rd valve 3 is arranged on first to be mixed on the cross-line 201, first end that mixes cross-line 201 is connected with the reserved opening 102 of reserving the storage tank feeding line, its the other end is connected with low pressure delivery trunk 202, the 4th valve 4 is arranged on second to be mixed on the cross-line 203, and second mixes cross-line 203 is connected between low pressure delivery trunk 202 and the LNG storage tank feeding line 104;
Cryogenic gas on the ship enters first greater than the cecum of the pipeline 101 of unloading a ship of the cecum of 30m and mixes cross-line 201 through having length, and then enter LNG storage tank 103 through low pressure delivery trunk 202, the second mixing cross-line 203, LNG storage tank feeding line 104 successively, will have length greater than pipeline 101 coolings of unloading a ship of the cecum of 30m.
In addition, time is longer if ship reaches port, cryogenic gas is when entering storage tank through " mix and use cross-line ", also can open low-pressure delivery pipeline downstream damper to certain aperture, downstream line is cooled down simultaneously, so both can make the cooling of full factory owner's pipeline more convenient, can avoid again the low-pressure delivery pipeline to use the work of interim vaporizer cooling (if cool off again the low-pressure delivery pipeline after finishing wait unloading a ship, need by interim vaporizer follow-up cooling work to be carried out in the LNG gasification again), so operation can be shortened the full factory driving time generally.
Fig. 3 is the unload a ship cooling system structure schematic representation of pipeline of the utility model the second embodiment's LNG Liquefied natural gas receiving station; As shown in the figure, this cooling system comprises: have length greater than the pipeline 101 of unloading a ship, LNG storage tank feeding line 104, LNG storage tank 103, the reserved opening 102 of reserving the storage tank feeding line, the first valve 1, the second valve 2, the 3rd valve 3, the 4th valve 4 and the interim pipeline 301 of the cecum of 30m, wherein
The reserved opening 102 of reserving the storage tank feeding line is arranged on has length greater than the cecum of the pipeline 101 of unloading a ship of the cecum of 30m, and the second valve 2 is arranged on before the reserved opening 102 of reserving the storage tank feeding line;
LNG storage tank feeding line 104 is connected to has length greater than the unloading a ship between pipeline 101 and the LNG storage tank 103 of the cecum of 30m, and the first valve 1 is arranged on the LNG storage tank feeding line 104;
One end of interim pipeline 301 is connected with the reserved opening 102 of reserving the storage tank feeding line, and its other end is connected with emptying pipeline 302, and the 3rd valve 3 and the 4th valve 4 are arranged on the two ends of interim pipeline 301;
Emptying pipeline 302 is connected with LNG storage tank feeding line 104;
Wherein, the size of emptying pipeline 302 is greater than 15cm(otherwise will become the unload a ship bottleneck of pipeline rate of cooling of impact, scheme is with infeasible), the size of interim pipeline 301 is not less than 15cm, has length greater than the pipeline 101 of unloading a ship of the cecum of 30m, the joint perforate of emptying pipeline 302 and interim pipeline 301 also is provided with the Subzero valve measure-alike with interim pipeline 301, when the cryogenic gas on utilizing ship cools off the pipeline of unloading a ship, the first valve 1 is in closed condition, the second valve 2, the 3rd valve 3 and the 4th valve 4 are in opening state, and emptying pipeline 302 downstream side valves are in closed condition.
Below be the cooling means of the pipeline of unloading a ship according to Fig. 3 embodiment's LNG Liquefied natural gas receiving station, may further comprise the steps:
Close the first valve 1, open simultaneously the second valve 2, the 3rd valve 3 and the 4th valve 4, wherein, the first valve 1 is arranged on to be connected to have on the LNG storage tank feeding line 104 between pipeline 101 and the LNG storage tank 103 of unloading a ship of length greater than the cecum of 30m, the second valve 2 is arranged on before the reserved opening 102 of reserving the storage tank feeding line, the reserved opening 102 of reserving the storage tank feeding line is arranged on has length greater than the cecum of the pipeline 101 of unloading a ship of the cecum of 30m, the 3rd valve 3 and the 4th valve 4 are arranged on the two ends of interim pipeline 301, one end of interim pipeline 301 is connected with the reserved opening 102 of reserving the storage tank feeding line, its the other end is connected with emptying pipeline 302, and emptying pipeline 302 is connected with LNG storage tank feeding line 104;
Cryogenic gas on the ship enters interim pipeline 301 through having length greater than the cecum of the pipeline 101 of unloading a ship of the cecum of 30m, and then enter LNG storage tank 103 through emptying pipeline 302, LNG storage tank feeding line 104 successively, will have length and evenly cool off greater than the pipeline 101 of unloading a ship of the cecum of 30m.
Fig. 4 is the cooling system structure schematic representation of the pipeline of unloading a ship according to the utility model the 3rd embodiment's LNG Liquefied natural gas receiving station; As shown in the figure, this cooling system comprises: have length greater than the pipeline 101 of unloading a ship, feeding line 104, LNG storage tank 103, the reserved opening 102 of reserving the storage tank feeding line, the first valve 1, the second valve 2, the 3rd valve 3, the 4th valve 4, the 5th valve 5, the 6th valve 6 and the interim pipeline 401 of the cecum of 30m, wherein
The reserved opening 102 of reserving the storage tank feeding line is arranged on has length greater than the cecum of the pipeline 101 of unloading a ship of the cecum of 30m, and the second valve 2 is arranged on before the reserved opening 102 of reserving the storage tank feeding line;
LNG storage tank feeding line 104 is connected to has length greater than the unloading a ship between pipeline 101 and the LNG storage tank 103 of the cecum of 30m, and the first valve 1 is arranged on the LNG storage tank feeding line 104;
One end of interim pipeline 401 with have the cecum of length greater than the pipeline 101 of unloading a ship of the cecum of 30m and be connected, its other end is connected with house steward BOG 402, the 3rd valve 3 and the 4th valve 4 are arranged on the two ends of interim pipeline 401;
House steward BOG 402 is connected with LNG storage tank 103, and the 5th valve 5 is arranged on house steward BOG 402 near an end of LNG storage tank 103, and the 6th valve 6 is arranged on house steward BOG 402 the other end;
When the cryogenic gas on utilizing ship cooled off the pipeline of unloading a ship, the first valve 1 and the 6th valve 6 were in closed condition, and the second valve 2, the 3rd valve 3, the 4th valve 4 and the 5th valve 5 are in opening state.
Below be the cooling means of the pipeline of unloading a ship according to Fig. 4 embodiment's LNG Liquefied natural gas receiving station, may further comprise the steps:
Close the first valve 1 and the 6th valve 6, open the second valve 2, the 3rd valve 3, the 4th valve 4 and the 5th valve 5, wherein, the first valve 1 is arranged on to be connected to have on the LNG storage tank feeding line 104 between pipeline 101 and the LNG storage tank 103 of unloading a ship of length greater than the cecum of 30m, the second valve 2 is arranged on before the reserved opening 102 of reserving the storage tank feeding line, the reserved opening 102 of reserving the storage tank feeding line is arranged on has length greater than the cecum of the pipeline 101 of unloading a ship of the cecum of 30m, the 3rd valve 3 and the 4th valve 4 are arranged on the two ends of interim pipeline 401, one end of interim pipeline 401 with have the cecum of length greater than the pipeline 101 of unloading a ship of the cecum of 30m and be connected, its the other end is connected with house steward BOG 402, house steward BOG 402 is connected with LNG storage tank 103, the 5th valve 5 is arranged on house steward BOG 402 near an end of LNG storage tank 103, and the 6th valve 6 is arranged on house steward BOG 402 the other end;
Cryogenic gas on the ship enters house steward BOG 402 through having length greater than the cecum of the pipeline 101 of unloading a ship of the cecum of 30m and interim pipeline 401, and then enters LNG storage tank 103, will have length greater than pipeline 101 coolings of unloading a ship of the cecum of 30m.
One of ordinary skill in the art will appreciate that: accompanying drawing is an embodiment's schematic representation, and the module in the accompanying drawing or flow process might not be that enforcement the utility model is necessary.
One of ordinary skill in the art will appreciate that: the module in the device among the embodiment can be described according to embodiment and be distributed in embodiment's the device, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
It should be noted that at last: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although with reference to previous embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that previous embodiment is put down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of the utility model embodiment technological scheme.
Claims (5)
1. the LNG Liquefied natural gas receiving station cooling system of pipeline of unloading a ship, it is characterized in that, comprise: have length greater than the pipeline of unloading a ship, LNG storage tank feeding line, LNG storage tank, reservation storage tank feeding line, the first valve, the second valve, the 3rd valve, the 4th valve, the first mixing cross-line and the second mixing cross-line of the cecum of 30m, wherein
The reserved opening of described reservation storage tank feeding line is arranged on describedly has length greater than the cecum of the pipeline of unloading a ship of the cecum of 30m, and described the second valve is arranged on before the reserved opening of described reservation storage tank feeding line;
Described LNG storage tank feeding line is connected to describedly has length greater than the unloading a ship between pipeline and the described LNG storage tank of the cecum of 30m, and described the first valve is arranged on the described LNG storage tank feeding line;
Described first end that mixes cross-line is connected with the reserved opening of described reservation storage tank feeding line, and its other end is connected with the low pressure delivery trunk, and described the 3rd valve is arranged on described first to be mixed on the cross-line;
Described second mix cross-line be connected to described low pressure delivery trunk with the described LNG storage tank feeding line of the described LNG storage tank that will be cooled between, described the 4th valve is arranged on described the second mixing cross-line;
Wherein, when the cryogenic gas on utilizing ship cooled off the pipeline of unloading a ship, described the first valve was in closed condition, and described the second valve, described the 3rd valve and described the 4th valve are in opening state.
2. cooling system according to claim 1, it is characterized in that, described reservation storage tank feeding line is provided with blind plate with the described first intersection point downstream of mixing cross-line, and described low pressure delivery trunk mixes the cross-line intersection point with described first the close storage tank side of reserving is provided with plate.
3. the LNG Liquefied natural gas receiving station cooling system of pipeline of unloading a ship, it is characterized in that, comprise: have length greater than the pipeline of unloading a ship, feeding line, LNG storage tank, reservation storage tank feeding line, the first valve, the second valve, the 3rd valve, the 4th valve and the first interim pipeline of the cecum of 30m, wherein
The reserved opening of described reservation storage tank feeding line is arranged on describedly has length greater than the cecum of the pipeline of unloading a ship of the cecum of 30m, and described the second valve is arranged on before the reserved opening of described reservation storage tank feeding line;
Described LNG storage tank feeding line is connected to described the unloading a ship between pipeline and the described LNG storage tank of cecum of having, and described the first valve is arranged on the described LNG storage tank feeding line;
One end of the described first interim pipeline is connected with the reserved opening of described reservation storage tank feeding line, and its other end is connected with the emptying pipeline, and described the 3rd valve and described the 4th valve are arranged on the two ends of the described first interim pipeline;
Described emptying pipeline is connected with described LNG storage tank feeding line;
Described have length greater than the joint perforate of the pipeline of unloading a ship of the cecum of 30m, described emptying pipeline and the described first interim pipeline and be provided with the Subzero valve identical with the described first interim line size, when the cryogenic gas on utilizing ship cools off the pipeline of unloading a ship, described the first valve is in closed condition, described the second valve, described the 3rd valve and described the 4th valve are in opening state, and described emptying line downstream side valve door is in closed condition.
4. cooling system according to claim 3, it is characterized in that, also comprise: the second interim pipeline, the one end has length and is connected greater than the cecum of the pipeline of unloading a ship of the cecum of 30m with described, its the other end is connected with described emptying pipeline, and the two ends of the described second interim pipeline are provided with the 5th valve and the 6th valve.
5. the LNG Liquefied natural gas receiving station cooling system of pipeline of unloading a ship, it is characterized in that, comprise: have length greater than the pipeline of unloading a ship, LNG storage tank feeding line, LNG storage tank, reservation storage tank feeding line, the first valve, the second valve, the 3rd valve, the 4th valve, the 5th valve, the 6th valve and the interim pipeline of the cecum of 30m, wherein:
The reserved opening of described reservation storage tank feeding line is arranged on describedly has length greater than the cecum of the pipeline of unloading a ship of the cecum of 30m, and described the second valve is arranged on before the reserved opening of described reservation storage tank feeding line;
Described LNG storage tank feeding line is connected to describedly has length greater than the unloading a ship between pipeline and the described LNG storage tank of the cecum of 30m, and described the first valve is arranged on the described LNG storage tank feeding line;
One end of described interim pipeline has length and is connected greater than the cecum of the pipeline of unloading a ship of the cecum of 30m with described, and its other end is connected with house steward BOG, and described the 3rd valve and described the 4th valve are arranged on the two ends of described interim pipeline;
Described house steward BOG is connected with described LNG storage tank, and described the 5th valve is arranged on described house steward BOG near an end of described LNG storage tank, and described the 6th valve is arranged on described house steward's BOG the other end;
When the cryogenic gas on utilizing ship cooled off the pipeline of unloading a ship, described the first valve and described the 6th valve were in closed condition, and described the second valve, described the 3rd valve, described the 4th valve and described the 5th valve are in opening state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377238 CN202733447U (en) | 2012-07-31 | 2012-07-31 | Cooling system for ship unloading pipeline of liquefied natural gas receiving station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377238 CN202733447U (en) | 2012-07-31 | 2012-07-31 | Cooling system for ship unloading pipeline of liquefied natural gas receiving station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202733447U true CN202733447U (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220377238 Withdrawn - After Issue CN202733447U (en) | 2012-07-31 | 2012-07-31 | Cooling system for ship unloading pipeline of liquefied natural gas receiving station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202733447U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767693A (en) * | 2012-07-31 | 2012-11-07 | 中国寰球工程公司 | Cooling system and method of unshipping pipeline of liquefied natural gas receiving station |
| CN105351662A (en) * | 2015-09-25 | 2016-02-24 | 中海福建天然气有限责任公司 | System for cooling pipeline through boil off gas (BOG) |
| CN108087720A (en) * | 2017-11-17 | 2018-05-29 | 深圳市燃气集团股份有限公司 | A kind of cooling gas production system and its method |
-
2012
- 2012-07-31 CN CN 201220377238 patent/CN202733447U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767693A (en) * | 2012-07-31 | 2012-11-07 | 中国寰球工程公司 | Cooling system and method of unshipping pipeline of liquefied natural gas receiving station |
| CN102767693B (en) * | 2012-07-31 | 2014-07-30 | 中国寰球工程公司 | Cooling system and method of unshipping pipeline of liquefied natural gas receiving station |
| CN105351662A (en) * | 2015-09-25 | 2016-02-24 | 中海福建天然气有限责任公司 | System for cooling pipeline through boil off gas (BOG) |
| CN105351662B (en) * | 2015-09-25 | 2017-11-17 | 中海福建天然气有限责任公司 | A kind of system using BOG cooling pipes |
| CN108087720A (en) * | 2017-11-17 | 2018-05-29 | 深圳市燃气集团股份有限公司 | A kind of cooling gas production system and its method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130213 Effective date of abandoning: 20140730 |
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| RGAV | Abandon patent right to avoid regrant |