CN109677565A - LNG ship oceangoing ship conveying refrigeration system and its freezing material delivery method - Google Patents
LNG ship oceangoing ship conveying refrigeration system and its freezing material delivery method Download PDFInfo
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- CN109677565A CN109677565A CN201910011589.8A CN201910011589A CN109677565A CN 109677565 A CN109677565 A CN 109677565A CN 201910011589 A CN201910011589 A CN 201910011589A CN 109677565 A CN109677565 A CN 109677565A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/26—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for frozen goods
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
LNG ship oceangoing ship conveying refrigeration system; including LNG storage tank, marine internal combustion engine and nitrogen storage tank; internal combustion engine air vent is connected on the marine internal combustion engine; the LNG storage tank (is laid on LNG ship oceangoing ship; it is characterized by: LNG storage tank is connected with LNG conveying inner tube; the periphery of the LNG conveying inner tube is also enclosed with outside protective pipe, and BOG efferent duct is also connected between LNG storage tank and BOG holding vessel, is equipped with liquid nitrogen storage tank below nitrogen storage tank；Beneficial effects of the present invention, this present invention can freeze the pipeline of conveying in LNG transfer process, make to form cryosphere in pipeline, avoid the heat volatilization in the transfer process of LNG, reduce loss, are suitble to promote the use of.
Description
Technical field
The present invention relates to LNG ship oceangoing ship transport field more particularly to a kind of LNG ship oceangoing ship BOG recovery system and its operation methods.
Background technique
LNG (Liquefied Natural Gas), the i.e. english abbreviation of liquefied natural gas.Natural gas be in gas field from
So mined fuel gas, is mainly made of methane.LNG is to be cooled to -162 by gaseous natural gas under normal pressure
DEG C, it is allowed to condense into liquid.Storage and transportation space can be greatlyd save after natural gas liquefaction, and there are the spies such as calorific value is big, performance is high
Point.
LNG be it is a kind of cleaning, the efficient energy.Realize that energy supply is polynary since imported L NG facilitates energy-consuming state
Change, ensure energy security, and exporting LNG facilitates natural gas producing nation effective exploitation natural gas resource, increases foreign exchange earnings, promotees
Into the national economic development, thus LNG trade is just becoming the new hot spot of global energy markets.BOG:Boil Off Gas flashed vapour,
Boil-off gas.The source of BOG: low-temperature condition LNG from liquefaction plant take on come after, generally by LNG tank car mode transport, due to
Durings storage, transport etc., the inevitable energy can carry out heat exchange with extraneous, so as to cause the LNG temperature inside tank car
Degree increases, therefore operative liquid evaporation generates BOG (Boil off Gas) flashed vapour.BOG is increased back up after being formed plus storage container
Pressure can wash safety valve open when pressure reaches certain pressure, extra natural gas discharge into atmosphere, with alleviate storage
Pressure inside tank avoids explosion dangerous situation.
In the transfer process of LNG, meeting during the dedicated conveying trough tank car of LNG is transferred to by LNG ships that transport
Heat is touched, therefore will cause volatilization seriously, it is more to the loss of LNG.
Summary of the invention
In view of the above deficiencies, the present invention provides a kind of LNG ship oceangoing ship conveying refrigeration system and its freezing material delivery method, this hairs
It is bright the pipeline of conveying to be freezed in LNG transfer process, make to form cryosphere in pipeline, avoids the transfer of LNG
Heat volatilization in the process, reduces loss.
The technical solution adopted in the present invention is as follows:
LNG ship oceangoing ship conveying refrigeration system, including LNG storage tank, marine internal combustion engine and nitrogen storage tank, the ship internal combustion
Internal combustion engine air vent is connected on machine, the LNG storage tank (is laid on LNG ship oceangoing ship, it is characterised in that: LNG storage tank connection
There is LNG to convey inner tube, the periphery of the LNG conveying inner tube is also enclosed with outside protective pipe, between LNG storage tank and BOG holding vessel
It is also connected with BOG efferent duct, liquid nitrogen storage tank is installed below nitrogen storage tank；
Belt wheel one, belt wheel two, secondary pulley and spindle rod are separately installed on the marine internal combustion engine, in which: ship internal combustion
Machine driving pulley two rotates, and cogged V-belt, the cogged V-belt and subband are connected between the belt wheel one, belt wheel two and spindle rod
Wheel engagement, the belt wheel one are also connected with the other side that transmission shaft extends to marine internal combustion engine across marine internal combustion engine；Transmission shaft
On cam two is uniformly installed, the lower section of the cam two is equipped with BOG Piston Air Compressor and is mounted on BOG holding vessel, cam two
Side be equipped with piston pump one, in which: piston pump one and nitrogen storage tank are connected with nitrogen input pipe one, and the piston pump one is also
Nitrogen supply pipe is connected between LNG conveying inner tube；Liquid is connected between BOG Piston Air Compressor and liquid BOG storage tank
BOG efferent duct is connected with liquid BOG supply pipe between BOG storage tank and marine internal combustion engine；
Upper be uniformly equipped with of the spindle rod drives the piston pump two moved back and forth by cam one；The piston pump two
It is connected with liquid nitrogen supply pipe to be connected between outside protective pipe and LNG conveying inner tube, be connected between liquid nitrogen storage tank and piston pump two
Liquid nitrogen input pipe, the end of outside protective pipe are connected with liquid nitrogen recovery tube, and control valve one is equipped on liquid nitrogen recovery tube, and liquid nitrogen returns
Closed tube is also connected with recovery pump, and the recovery pump is connected with the liquid nitrogen reflux pipe connecting with liquid nitrogen storage tank；It is set in LNG conveying inner tube
There is outlet, control valve two is installed on outlet, nitrogen reflux pipe, nitrogen are connected between outlet and nitrogen storage tank
Aspiration pump is also equipped on return pipe, outlet is laid on carriage.
Another embodiment party of the invention further includes multiple shafts laid up and down, between the shaft on pass through gear
Intermeshing transmission, in which: conveyer belt is connected between the shaft and secondary pulley of top, the shaft of bottommost is connected with electricity
Machine.
Based on above-mentioned apparatus, the present invention also proposes a kind of freezing material delivery method of LNG ship oceangoing ship conveying refrigeration system, feature
It is, comprising the following steps:
1) during transportation, the marine internal combustion engine of ship is operating LNG ship oceangoing ship, and the BOG that LNG storage tank transport generates is in
Steam state directly passes through BOG efferent duct and is admitted in BOG holding vessel, and marine internal combustion engine passes through tooth by the rotation of driving pulley two later
The shape V band band rotation of movable belt pulley one rotates transmission shaft；
2) transmission shaft band moving cam two, which rotates, simultaneously acts on piston pump one and BOG Piston Air Compressor, makes BOG piston
Air compressor machine carries out pressurization to the steam state BOG in BOG holding vessel and becomes liquid and by liquid BOG efferent duct feeding BOG storage tank
Interior, LNG is transported in marine internal combustion engine by liquid BOG supply pipe and is used by BOG storage tank；
3) when LNG storage tank is unloaded, the nitrogen in nitrogen storage tank is carried out by piston pump one first
Then nitrogen is pressed into nitrogen in extraction by the way that under the action of cam two, piston pump one constantly moves reciprocatingly by extraction
It is sent into supply pipe in LNG conveying inner tube and is cooled down in advance in pipe；
4) it drives spindle rod rotation to make cam one that piston pump two be driven to move reciprocatingly in the driving of cogged V-belt to store up liquid nitrogen
Tank is defeated with LNG by being sent to outside protective pipe by liquid nitrogen supply pipe again after piston pump two after being retracted in liquid nitrogen input pipe
It send and forms cryosphere between inner tube, cooling is completed at this time；
5) nitrogen reflux pipe is connected into outlet, opens control valve two, starting aspiration pump starts LNG conveying inner tube
Nitrogen is withdrawn into nitrogen storage tank, later separates nitrogen reflux pipe with outlet, later by outlet and LNG groove tank car
Feed pipe connection；
6) start conveying, the LNG in LNG storage tank is transferred in LNG groove tank car, in the process, outside protective pipe with
The cryosphere formed between LNG conveying inner tube makes always LNG conveying inner tube keep low temperature environment, and such LNG is during the material conveying process
Loss will not be evaporated；
7) after LNG is transmitted, open control valve one, by recovery pump by outside protective pipe and LNG convey inner tube it
Between liquid nitrogen recycled, sent back in liquid nitrogen storage tank by liquid nitrogen reflux pipe.
Beneficial effects of the present invention, this present invention can freeze the pipeline of conveying in LNG transfer process, make pipe
Cryosphere is formed in road, is avoided the heat volatilization in the transfer process of LNG, is reduced loss, is suitble to promote the use of.
Detailed description of the invention
Fig. 1 is the overall structure diagram of LNG ship oceangoing ship conveying refrigeration system of the present invention；
Fig. 2 is the further disassemblying structure schematic diagram of Fig. 1 of the present invention；
Fig. 3 is the structural schematic diagram of another view direction of Fig. 2 of the present invention；
Fig. 4 is the structural schematic diagram of another view direction of Fig. 1 of the present invention；
Fig. 5 is the positive structure diagram of Fig. 2 of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
As shown, LNG ship oceangoing ship conveying refrigeration system, including LNG storage tank 28, marine internal combustion engine 13 and nitrogen storage tank
23, internal combustion engine air vent 4 is connected on the marine internal combustion engine 13, and the LNG storage tank 28 is laid on LNG ship oceangoing ship, LNG storage
It deposits tank 28 and is connected with LNG conveying inner tube 40, the periphery of the LNG conveying inner tube 40 is also enclosed with outside protective pipe 19, both formd
Furthermore bimetallic tube is also equipped with insulating layer, is also connected with BOG between LNG storage tank 28 and BOG holding vessel 10 on outside protective pipe 19
Efferent duct 27, the lower section of nitrogen storage tank 23 are equipped with liquid nitrogen storage tank 24；
Belt wheel 1, belt wheel 2 31, secondary pulley 35 and spindle rod 41 are separately installed on the marine internal combustion engine 13,
In: the rotation of 13 driving pulley 2 31 of marine internal combustion engine is connected with tooth form between the belt wheel 1, belt wheel 2 31 and spindle rod 41
V band 32, the cogged V-belt 32 are engaged with secondary pulley 35, and the belt wheel 1 is also connected with transmission shaft 11 across marine internal combustion engine
13 extend to the other side of marine internal combustion engine 13；Cam 28 is uniformly installed, the lower section of the cam 28 is set on transmission shaft 11
There is BOG Piston Air Compressor 9 to be mounted on BOG holding vessel 10, the side of cam 28 is equipped with piston pump 1, in which: piston pump 1
It is connected with nitrogen input pipe 1 with nitrogen storage tank 23, the piston pump 1 is also connected with nitrogen between LNG conveying inner tube 40
Gas supply pipe 15；Liquid BOG efferent duct 26, BOG storage tank are connected between BOG Piston Air Compressor 9 and liquid BOG storage tank 25
Liquid BOG supply pipe 14 is connected between 25 and marine internal combustion engine 13.
Upper be uniformly equipped with of spindle rod 41 drives the piston pump 2 36 moved back and forth by cam 1；The piston pump
2 36, which are connected with liquid nitrogen supply pipe 16, is connected between outside protective pipe 19 and LNG conveying inner tube 40, liquid nitrogen storage tank 24 and piston pump
It is connected with liquid nitrogen input pipe 22 between 2 36, the end of outside protective pipe 19 is connected with liquid nitrogen recovery tube 18, on liquid nitrogen recovery tube 18
Control valve 1 is installed, liquid nitrogen recovery tube 18 is also connected with recovery pump 17, and the recovery pump 17 is connected with and liquid nitrogen storage tank
The liquid nitrogen reflux pipe 20 of 24 connections；LNG conveys inner tube 40 and is equipped with outlet 1, is equipped with control valve 2 46 on outlet 1,
Nitrogen reflux pipe 21 is connected between outlet 1 and nitrogen storage tank 23, it is installation that nitrogen reflux pipe 21, which belongs to removable, is needed
Installation connects when recycling nitrogen is, dismounting when not needing, and is also equipped with aspiration pump on nitrogen reflux pipe 21, outlet 1 is laid in
On carriage 2.
Based on above-mentioned apparatus, the present invention also proposes a kind of freezing material delivery method of LNG ship oceangoing ship conveying refrigeration system, feature
It is, comprising the following steps:
1) during transportation, the marine internal combustion engine 13 of ship is operating LNG ship oceangoing ship, and the transport of LNG storage tank 28 generates
BOG directly passes through BOG efferent duct 27 in steam state and is admitted in BOG holding vessel 10, and marine internal combustion engine 13 passes through driving pulley later
2 31 rotations rotate transmission shaft 11 with the rotation of movable belt pulley 1 by cogged V-belt 32；
2) transmission shaft 11 is rotated with moving cam 28 and is acted on simultaneously piston pump 1 and BOG Piston Air Compressor 9, is made
BOG Piston Air Compressor 9, which pressurize to the steam state BOG in BOG holding vessel 10, to be become liquid and is sent by liquid BOG efferent duct 26
Enter in BOG storage tank 25, LNG is transported in marine internal combustion engine 13 by liquid BOG supply pipe 14 and is used by BOG storage tank 25；
3) when LNG storage tank 28 is unloaded, pass through piston pump 1 first for the nitrogen in nitrogen storage tank 23
It is extracted out, is then pressed into nitrogen in extraction by the way that under the action of cam 28, piston pump 1 constantly moves reciprocatingly
It is sent into nitrogen supply pipe 15 in LNG conveying inner tube 40 and is cooled down in advance in pipe；
4) rotation of spindle rod 41 is driven to make cam 1 that piston pump 2 36 be driven to move reciprocatingly in the driving of cogged V-belt 32
By being sent into again by liquid nitrogen supply pipe 16 after piston pump 2 36 after liquid nitrogen storage tank 24 is retracted in liquid nitrogen input pipe 22
Cryosphere is formed between outside protective pipe 19 and LNG conveying inner tube 40, cooling is completed at this time；
5) nitrogen reflux pipe 21 is connected into outlet 1, opens control valve 2 46, starting aspiration pump starts to convey LNG
The nitrogen of inner tube 40 is withdrawn into nitrogen storage tank 23, is later separated nitrogen reflux pipe 21 with outlet 1, later by outlet
1 connect with the feed pipe of LNG groove tank car；
6) start conveying, the LNG in LNG storage tank 28 is transferred in LNG groove tank car, in the process, outside protective pipe
The cryosphere formed between 19 and LNG conveying inner tube 40 makes always LNG conveying inner tube 40 keep low temperature environment, and such LNG is defeated
Loss will not be evaporated during material；
7) after LNG is transmitted, control valve 1 is opened, is conveyed outside protective pipe 19 and LNG by recovery pump 17
Liquid nitrogen between inner tube 40 is recycled, and is sent back in liquid nitrogen storage tank 24 by liquid nitrogen reflux pipe 20.
Embodiment 2
As shown, LNG ship oceangoing ship conveying refrigeration system, including LNG storage tank 28, marine internal combustion engine 13 and nitrogen storage tank
23, internal combustion engine air vent 4 is connected on the marine internal combustion engine 13, and the LNG storage tank 28 is laid on LNG ship oceangoing ship, LNG storage
It deposits tank 28 and is connected with LNG conveying inner tube 40, the periphery of the LNG conveying inner tube 40 is also enclosed with outside protective pipe 19, both formd
Furthermore bimetallic tube is also equipped with insulating layer, is also connected with BOG between LNG storage tank 28 and BOG holding vessel 10 on outside protective pipe 19
Efferent duct 27, the lower section of nitrogen storage tank 23 are equipped with liquid nitrogen storage tank 24；
Belt wheel 1, belt wheel 2 31, secondary pulley 35 and spindle rod 41 are separately installed on the marine internal combustion engine 13,
In: the rotation of 13 driving pulley 2 31 of marine internal combustion engine is connected with tooth form between the belt wheel 1, belt wheel 2 31 and spindle rod 41
V band 32, the cogged V-belt 32 are engaged with secondary pulley 35, and the belt wheel 1 is also connected with transmission shaft 11 across marine internal combustion engine
13 extend to the other side of marine internal combustion engine 13；Cam 28 is uniformly installed, the lower section of the cam 28 is set on transmission shaft 11
There is BOG Piston Air Compressor 9 to be mounted on BOG holding vessel 10, the side of cam 28 is equipped with piston pump 1, in which: piston pump 1
It is connected with nitrogen input pipe 1 with nitrogen storage tank 23, the piston pump 1 is also connected with nitrogen between LNG conveying inner tube 40
Gas supply pipe 15；Liquid BOG efferent duct 26, BOG storage tank are connected between BOG Piston Air Compressor 9 and liquid BOG storage tank 25
Liquid BOG supply pipe 14 is connected between 25 and marine internal combustion engine 13.
Upper be uniformly equipped with of spindle rod 41 drives the piston pump 2 36 moved back and forth by cam 1；The piston pump
2 36, which are connected with liquid nitrogen supply pipe 16, is connected between outside protective pipe 19 and LNG conveying inner tube 40, liquid nitrogen storage tank 24 and piston pump
It is connected with liquid nitrogen input pipe 22 between 2 36, the end of outside protective pipe 19 is connected with liquid nitrogen recovery tube 18, on liquid nitrogen recovery tube 18
Control valve 1 is installed, liquid nitrogen recovery tube 18 is also connected with recovery pump 17, and the recovery pump 17 is connected with and liquid nitrogen storage tank
The liquid nitrogen reflux pipe 20 of 24 connections；LNG conveys inner tube 40 and is equipped with outlet 1, is equipped with control valve 2 46 on outlet 1,
Nitrogen reflux pipe 21 is connected between outlet 1 and nitrogen storage tank 23, it is installation that nitrogen reflux pipe 21, which belongs to removable, is needed
Installation connects when recycling nitrogen is, dismounting when not needing, and is also equipped with aspiration pump on nitrogen reflux pipe 21, outlet 1 is laid in
On carriage 2.
When ship pulls in shore in parked state, marine internal combustion engine 13 be it is idle, therefore, the present embodiment further includes more
A shaft 29 laid up and down, it is upper between the shaft 29 to pass through the intermeshing transmission of gear 5, in which: the shaft of top with
Conveyer belt (34) are connected between secondary pulley 35, the shaft of bottommost is connected with motor.
Based on above-mentioned apparatus, the present invention also proposes a kind of freezing material delivery method of LNG ship oceangoing ship conveying refrigeration system, feature
It is, comprising the following steps:
1) when LNG ship oceangoing ship pulls in shore, marine internal combustion engine 13 does not work, and motor drives the shaft rotation of bottommost at this time, passes through
The intermeshing transmission of gear 5 makes multiple shafts 29 link, and makes transmission shaft 11 with the rotation of movable belt pulley 1 by cogged V-belt 32
Rotation, the BOG that the transport of LNG storage tank 28 generates directly pass through BOG efferent duct 27 in steam state and are admitted in BOG holding vessel 10；
2) transmission shaft 11 is rotated with moving cam 28 and is acted on simultaneously piston pump 1 and BOG Piston Air Compressor 9, is made
BOG Piston Air Compressor 9, which pressurize to the steam state BOG in BOG holding vessel 10, to be become liquid and is sent by liquid BOG efferent duct 26
Enter in BOG storage tank 25 and saves；
3) when LNG storage tank 28 is unloaded, pass through piston pump 1 first for the nitrogen in nitrogen storage tank 23
It is extracted out, is then pressed into nitrogen in extraction by the way that under the action of cam 28, piston pump 1 constantly moves reciprocatingly
It is sent into nitrogen supply pipe 15 in LNG conveying inner tube 40 and is cooled down in advance in pipe；
4) rotation of spindle rod 41 is driven to make cam 1 that piston pump 2 36 be driven to move reciprocatingly in the driving of cogged V-belt 32
By being sent into again by liquid nitrogen supply pipe 16 after piston pump 2 36 after liquid nitrogen storage tank 24 is retracted in liquid nitrogen input pipe 22
Cryosphere is formed between outside protective pipe 19 and LNG conveying inner tube 40, cooling is completed at this time；
5) nitrogen reflux pipe 21 is connected into outlet 1, opens control valve 2 46, starting aspiration pump starts to convey LNG
The nitrogen of inner tube 40 is withdrawn into nitrogen storage tank 23, is later separated nitrogen reflux pipe 21 with outlet 1, later by outlet
1 connect with the feed pipe of LNG groove tank car；
6) start conveying, the LNG in LNG storage tank 28 is transferred in LNG groove tank car, in the process, outside protective pipe
The cryosphere formed between 19 and LNG conveying inner tube 40 makes always LNG conveying inner tube 40 keep low temperature environment, and such LNG is defeated
Loss will not be evaporated during material；
7) after LNG is transmitted, control valve 1 is opened, is conveyed outside protective pipe 19 and LNG by recovery pump 17
Liquid nitrogen between inner tube 40 is recycled, and is sent back in liquid nitrogen storage tank 24 by liquid nitrogen reflux pipe 20.
Although the illustrative specific embodiment of the present invention is described above, in order to the technology of the art
Personnel are it will be appreciated that the present invention, but the present invention is not limited only to the range of specific embodiment, to the common skill of the art
For art personnel, as long as long as various change the attached claims limit and determine spirit and scope of the invention in, one
The innovation and creation using present inventive concept are cut in the column of protection.
Claims (3)
1.LNG ship conveying refrigeration system, including LNG storage tank (28), marine internal combustion engine (13) and nitrogen storage tank (23), institute
It states and is connected on marine internal combustion engine (13) internal combustion engine air vent (4), the LNG storage tank (28) is laid on LNG ship oceangoing ship, special
Sign is: LNG storage tank (28) is connected with LNG conveying inner tube (40), and the periphery of LNG conveying inner tube (40) is also enclosed with outer
Protection pipe (19) is also connected with BOG efferent duct (27), nitrogen storage tank between LNG storage tank (28) and BOG holding vessel (10)
(23) liquid nitrogen storage tank (24) are installed below；
Belt wheel one (30), belt wheel two (31), secondary pulley (35) and spindle rod are separately installed on the marine internal combustion engine (13)
(41), in which: marine internal combustion engine (13) driving pulley two (31) rotation, the belt wheel one (30), belt wheel two (31) and spindle rod
(41) it is connected between cogged V-belt (32), the cogged V-belt (32) is engaged with secondary pulley (35), and the belt wheel one (30) also connects
It is connected to the other side that transmission shaft (11) extend to marine internal combustion engine (13) across marine internal combustion engine (13)；It is uniformly distributed on transmission shaft (11)
Cam two (8) is installed, the lower section of the cam two (8) is equipped with BOG Piston Air Compressor (9) and is mounted on BOG holding vessel (10),
The side of cam two (8) is equipped with piston pump one (7), in which: piston pump one (7) and nitrogen storage tank (23) are connected with nitrogen input
Pipe one (12), the piston pump one (7) are also connected with nitrogen supply pipe (15) between LNG conveying inner tube (40)；BOG piston is empty
Liquid BOG efferent duct (26), BOG storage tank (25) and ship internal combustion are connected between press (9) and liquid BOG storage tank (25)
Liquid BOG supply pipe (14) is connected between machine (13)；
Upper be uniformly equipped with of the spindle rod (41) drives the piston pump two (36) moved back and forth by cam one (42)；It is described
Piston pump two (36) is connected with liquid nitrogen supply pipe (16) and is connected between outside protective pipe (19) and LNG conveying inner tube (40), liquid nitrogen
It is connected between storage tank (24) and piston pump two (36) liquid nitrogen input pipe (22), the end of outside protective pipe (19) is connected with liquid nitrogen and returns
Closed tube (18) is equipped with control valve one (45) on liquid nitrogen recovery tube (18), and liquid nitrogen recovery tube (18) is also connected with recovery pump
(17), the recovery pump (17) is connected with the liquid nitrogen reflux pipe (20) connecting with liquid nitrogen storage tank (24)；LNG is conveyed on inner tube (40)
Equipped with outlet (1), control valve two (46) is installed on outlet (1), is connected between outlet (1) and nitrogen storage tank (23)
It is connected to nitrogen reflux pipe (21), aspiration pump is also equipped on nitrogen reflux pipe (21), outlet (1) is laid on carriage (2).
2. LNG ship oceangoing ship conveying refrigeration system according to claim 1, it is characterised in that: further include multiple layings up and down
Shaft (29), it is upper between the shaft (29) to pass through gear (5) intermeshing transmission, in which: the shaft and secondary pulley of top
(35) conveyer belt (34) are connected between, the shaft of bottommost is connected with motor.
The freezing material delivery method of 3.LNG ship conveying refrigeration system, which comprises the following steps:
1) during transportation, the marine internal combustion engine (13) of ship is operating LNG ship oceangoing ship, and LNG storage tank (28) transport generates
BOG directly passes through BOG efferent duct (27) in steam state and is admitted in BOG holding vessel (10), and marine internal combustion engine (13) passes through drive later
Movable belt pulley two (31) rotation rotates transmission shaft (11) by cogged V-belt (32) band movable belt pulley one (30) rotation；
2) transmission shaft (11) band moving cam two (8), which rotates, simultaneously acts on piston pump one (7) and BOG Piston Air Compressor (9),
Make BOG Piston Air Compressor (9) carry out pressurization to the steam state BOG in BOG holding vessel (10) to become liquid and export by liquid BOG
It manages (26) to be sent into BOG storage tank (25), LNG is transported in ship by BOG storage tank (25) by liquid BOG supply pipe (14)
It is used in combustion engine (13)；
3) when LNG storage tank (28) is unloaded, pass through piston pump one (7) first for the nitrogen in nitrogen storage tank (23)
Gas is extracted out, then by the way that under the action of cam two (8), piston pump one (7) constantly moves reciprocatingly and extracts nitrogen side out
While being pressed into nitrogen supply pipe (15) and being sent into LNG conveying inner tube (40) and cooled down in advance in pipe；
4) spindle rod (41) rotation is driven to make cam one (42) that piston pump two (36) be driven to do back and forth in the driving of cogged V-belt (32)
Movement is supplied by liquid nitrogen after liquid nitrogen storage tank (24) is retracted in liquid nitrogen input pipe (22) by piston pump two (36) again later
It is sent between outside protective pipe (19) and LNG conveying inner tube (40) to pipe (16) and forms cryosphere, cooling is completed at this time；
5) nitrogen reflux pipe (21) are connected into outlet (1), opened control valve two (46), starting aspiration pump starts LNG is defeated
It send the nitrogen of inner tube (40) to be withdrawn into nitrogen storage tank (23), later separates nitrogen reflux pipe (21) with outlet (1), it
Outlet (1) is connect with the feed pipe of LNG groove tank car afterwards；
6) start conveying, the LNG in LNG storage tank (28) is transferred in LNG groove tank car, in the process, outside protective pipe
(19) cryosphere formed between LNG conveying inner tube (40) makes always LNG conveying inner tube (40) keep low temperature environment, in this way
LNG will not be evaporated loss during the material conveying process；
7) it after LNG is transmitted, opens control valve one (45), it is by recovery pump (17) that outside protective pipe (19) and LNG is defeated
It send the liquid nitrogen between inner tube (40) to be recycled, is sent back in liquid nitrogen storage tank (24) by liquid nitrogen reflux pipe (20).
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| CN201910011589.8A CN109677565B (en) | 2019-01-07 | 2019-01-07 | LNG ship material conveying refrigeration system and refrigeration material conveying method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285319A (en) * | 2019-07-09 | 2019-09-27 | 上海原能细胞生物低温设备有限公司 | A kind of liquid nitrogen recovery system and liquid nitrogen recovery method |
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| CN110285319B (en) * | 2019-07-09 | 2024-04-26 | 上海原能细胞生物低温设备有限公司 | Liquid nitrogen recovery system and liquid nitrogen recovery method |
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