CN207991061U - The cold energy recovery system at small-sized LNG gasification station - Google Patents
The cold energy recovery system at small-sized LNG gasification station Download PDFInfo
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- CN207991061U CN207991061U CN201820429838.6U CN201820429838U CN207991061U CN 207991061 U CN207991061 U CN 207991061U CN 201820429838 U CN201820429838 U CN 201820429838U CN 207991061 U CN207991061 U CN 207991061U
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Abstract
The cold energy recovery system at small-sized LNG gasification station, belongs to energy technology field.It is for solving the problems, such as that it is low that traditional LNG cold energy recovery systems cannot achieve remotely conveying, cold energy organic efficiency.Level-one gasifier is connected to the entrance of fluid reservoir A, three-way pipe one respectively with fluid reservoir A, fluid reservoir B and condenser connection, communicating pipe one one end and two one end of communicating pipe be connected to fluid reservoir B, communicating pipe one other end and two other end of communicating pipe be connected to fluid reservoir C, it is mounted on freezer evaporator on communicating pipe one and communicating pipe two, three-way pipe two respectively with fluid reservoir C, fluid reservoir D and condenser connection, carbon-dioxide gas compressor was mounted on communicating pipe six, level-one gasifier is connected to two level gasifier, two level gasifier is connected to ethylene glycol cold storage tank, ethylene glycol cold storage tank is connected to ability of swimming refrigeration unit, ability of swimming refrigeration unit is connected to air-conditioning system in station.The utility model fully recycles the cold energy that LNG is discharged in gasification；Realize long-range conveying cold energy.
Description
Technical field
The utility model belongs to energy technology field, more particularly to a kind of cold energy recovery system at small-sized LNG gasification station.
Background technology
With the scarcity of the mineral resources such as coal and oil, in addition continuous improvement of the country to energy-saving and emission-reduction requirement, natural gas
It is widely used in the every field such as industrial and civilian as a kind of emerging clean energy resource.Since gas line network layout is limited,
Far can not meet the needs of actual conditions, therefore, the country is newly-built, and there are many small-sized LNG gasification stations to make up lacking in demand
Mouthful.
LNG is that natural gas is purified, dry, demercuration, and detaches the cryogenic liquid of about -162 DEG C of temperature obtained after heavy hydrocarbon.
In its production process, power consumption reaches 850kWh/t.Therefore, when LNG will release a large amount of cold energy when gasification station gasifies, after
Person is good green energy resource.It is calculated according to the electricity price of 0.7 yuan/degree for freezing project, the value of -162 DEG C of LNG cold energy is about
420 yuan/ton.Since one ton of LNG of production needs the electric power of consumption 850kWh, useful work there was only 120kWh or so, liquefying
Cheng Zhong, irreversible loss reach 730kWh, this is that process of refrigerastion institute is inevitable.If improving Refrigeration Technique, this can be reduced
Partial loss, but according to its reduction limitation from the point of view of current technology.So if the potential temperatures such as these colds are passed to cold energy
User, and consider heat transfer temperature difference and process losses, then it can generally save the electric power of 500-700kWh.So far, in external LNG
Successful case in terms of cold energy use is individual event utilization technology, and cold energy use is less efficient, and comprehensive and integration considers LNG cold energy
There is not been reported and discloses for the technology utilized.
Freezing freezer project is that energy-saving effect significantly utilizes project, while being also relatively suitble to the application of small evaporator station.Port
The Foshan apricot altar LNG gasification station that magnificent gas company is built is to provide air source for the gas transmission and distribution system in Shuande area, for warp
Ji effectively utilizes the cold energy generated when LNG gasification.It has gone into operation in 2010 a cold storage warehouse adjoining apricot altar gasification station,
This project is domestic first small evaporator station LNG cold energy use demonstration projects.But there are quick-fried for the refrigerating medium ammonia of the project
Fried danger and liquid ammonia is unsuitable for remotely conveying, and limits the utilization of cold energy.
Invention content
In view of the above-mentioned problems of the prior art, the utility model provides a kind of cold energy recycling at small-sized LNG gasification station
System, for solving the problems, such as that it is low that traditional LNG cold energy recovery systems cannot achieve remotely conveying, cold energy organic efficiency.
Technical solution adopted in the utility model is：The cold energy recovery system at small-sized LNG gasification station, including level-one gasification
Device, fluid reservoir A, three-way pipe one, communicating pipe one, condenser, communicating pipe two, carbon-dioxide gas compressor, freezer evaporator, fluid reservoir
C, three-way pipe two, fluid reservoir D, fluid reservoir B, two level gasifier, circulating line one, ethylene glycol cold storage tank, circulating line two, ability of swimming
Air-conditioning system in refrigeration unit, circulating line three and station；The outlet one of the level-one gasifier is connected to the entrance of fluid reservoir A,
Three nozzles of three-way pipe one are described respectively with the outlet of fluid reservoir A, the outlet of the entrance of fluid reservoir B and condenser
Communicating pipe one one end and outlet of two one end of communicating pipe with fluid reservoir B, the communicating pipe one other end and communicating pipe two
The other end is connected to the entrance of fluid reservoir C, is mounted on freezer evaporator on the communicating pipe one and communicating pipe two, and described three
Three nozzles of siphunculus two are connected to the entrance of the outlet of fluid reservoir C, the entrance of fluid reservoir D and condenser respectively, three-way pipe
Two are connected to by communicating pipe six with the entrance of condenser, and the carbon-dioxide gas compressor was mounted on communicating pipe six, the level-one
The outlet two of gasifier is connected to the entrance of two level gasifier, is communicated with and is followed between the two level gasifier and ethylene glycol cold storage tank
Endless tube road one is communicated with circulating line two, the ability of swimming refrigeration unit between the ethylene glycol cold storage tank and ability of swimming refrigeration unit
Circulating line three is communicated between air-conditioning system in station.
The beneficial effects of the utility model are：
The utility model fully recycles the cold energy that LNG is discharged in gasification；It is safe and reliable to recycle cold energy；It realizes long-range defeated
Cold energy is sent, the application range of cold energy is substantially increased；The utility model greatly reduces operation difficulty, and overall process realizes intelligence
Change, without manually operating repeatedly；The utility model is the system designed based on small-sized LNG gasification station, may be directly applied to give birth to
Production practice.
Description of the drawings
Fig. 1：The utility model level-one gasifier work flow diagram；
Fig. 2：The utility model two level gasifier work flow diagram；
Fig. 3：The utility model level-one gasifier is connected to schematic diagram with two level gasifier；
Wherein：1- level-one gasifiers；2- fluid reservoirs A；3- communicating pipes three；4- three-way pipes one；5- pipe electromagnetic valves；6- is connected to
Guan Si；7- three-way magnetic valves；8- communicating pipes one；9- expansion valves；10- condensers；11- communicating pipes two；12- carbon dioxide compressions
Machine；13- communicating pipes six；14- regulating valves；15- freezer evaporators；16- fluid reservoirs C；17- three-way pipes two；18- communicating pipes five；19-
Fluid reservoir D；20- fluid reservoirs B；21- two level gasifiers；22- circulating lines one；23- ethylene glycol cold storage tanks；24- circulating lines two；
25- ability of swimming refrigeration units；26- circulating lines three；Air-conditioning system in the stations 27-；28- computers；29- displays.
Specific implementation mode
As shown in Fig. 1 ~ Fig. 3, the cold energy recovery system at small-sized LNG gasification station, including level-one gasifier 1, fluid reservoir A2, three
Siphunculus 1, communicating pipe 1, condenser 10, communicating pipe 2 11, carbon-dioxide gas compressor 12, freezer evaporator 15, fluid reservoir
C16, three-way pipe 2 17, fluid reservoir D19, fluid reservoir B20, two level gasifier 21, circulating line 1, ethylene glycol cold storage tank 23,
Air-conditioning system 27 in circulating line 2 24, ability of swimming refrigeration unit 25, circulating line 3 26 and station；The level-one gasifier 1 goes out
Mouthful one is connected to the entrance of fluid reservoir A2, three nozzles of three-way pipe 1 respectively with the outlet of fluid reservoir A2, fluid reservoir B20
The outlet of entrance and condenser 10, the communicating pipe one 8 one end and communicating pipe 2 11 one end go out with fluid reservoir B20
Mouthful connection, the communicating pipe one 8 other end and 2 11 other end of communicating pipe be connected to the entrance of fluid reservoir C16, the connection
Pipe 1 and freezer evaporator 15 is mounted on communicating pipe 2 11, three nozzles of the three-way pipe 2 17 respectively with fluid reservoir
The entrance of the outlet of C16, the entrance of fluid reservoir D19 and condenser 10 is connected to, three-way pipe 2 17 by communicating pipe 6 13 with it is cold
The entrance of condenser 10 is connected to, and the carbon-dioxide gas compressor 12 was mounted on communicating pipe 6 13, the outlet of the level-one gasifier 1
Two are connected to the entrance of two level gasifier 21, and circulating line is communicated between the two level gasifier 21 and ethylene glycol cold storage tank 23
One 22, circulating line 2 24, the ability of swimming refrigeration machine are communicated between the ethylene glycol cold storage tank 23 and ability of swimming refrigeration unit 25
In group 25 and station circulating line 3 26 is communicated between air-conditioning system 27.
The refrigerating medium of the level-one gasifier 1 is R744, and 21 refrigerating medium of two level gasifier is ethylene glycol solution.Level-one gas
It is shell-and-tube gasifier to change device 1 and two level gasifier 21.
The carbon-dioxide gas compressor 12 is R744 frequency-changeable compressors.
The cold energy recovery system at the small-sized LNG gasification station further includes two three-way magnetic valves 7, the communicating pipe one 8 He
Three-way magnetic valve 7 is mounted on communicating pipe 2 11, the remaining nozzle of described two three-way magnetic valves 7 connects with fluid reservoir B20
Logical, each three-way magnetic valve 7 is arranged between fluid reservoir B20 and corresponding freezer evaporator 15.
The cold energy recovery system at the small-sized LNG gasification station further includes four pipe electromagnetic valves 5, and the three-way pipe 1 is logical
Cross and be connected to the entrance of fluid reservoir B20 communicating pipe 33, three-way pipe 1 by the outlet of communicating pipe 46 and condenser 10,
The three-way pipe 2 17 is connected to by communicating pipe 5 18 with the entrance of fluid reservoir D19, communicating pipe 46, is connected the communicating pipe 33
Siphunculus 5 18 and pipe electromagnetic valve 5 is mounted on communicating pipe 6 13.
The cold energy recovery system at the small-sized LNG gasification station further includes expansion valve 9 and two regulating valves 14, the expansion valve
9 were mounted on communicating pipe 46, and described two regulating valves 14 were separately mounted on communicating pipe 1 and communicating pipe 2 11, each to adjust
Valve 14 is respectively provided between corresponding freezer evaporator 15 and three-way magnetic valve 7.
The cold energy recovery system at the small-sized LNG gasification station further includes automatic control system, the automatic control system packet
Computer 28 and display 29 are included, the display 29 is electrically connected with computer 28, and the computer 28 collects treatment temperature, pressure
Output control signal, controls the pipe electromagnetic valve 5 of three-way magnetic valve 7, four of carbon-dioxide gas compressor 12, two respectively after force signal
It opens and closes, display 29 is used to show the control signal that computer 28 exports..
Workflow：As shown in Figure 1, when gasification station gasifies -162 DEG C of LNG, LNG is first through level-one gasifier（CU1）
1, with gaseous state CO2It exchanges heat CO2Freezing is liquid CO2, liquid CO2Be transported to after fluid reservoir A2 distant place refrigeration storehouse,
The liquid CO at food processing center2Fluid reservoir B20, the freezer evaporator 15 then passed through in the air-cooler of freezer become gaseous state
CO2, the gaseous CO of each evaporator out2It first collects in air accumulator C16, extra gaseous state after storage capacity reaches definite value
CO2It is stored in air accumulator D19, later these gaseous CO2Back to level-one gasifier（CU1）1.
When the amount of gasification station gasification is less, when the cold energy deficiency provided, the liquid CO that is first stored from fluid reservoir A22It is transported to
The liquid CO of freezer2The insufficient supply of fluid reservoir B20 supplement colds.When gasification station stop operation when, start freezer it is spare two
Carbonoxide compressor 12, by the gaseous state CO in air accumulator C162The CO of the high temperature of boil down to high pressure2Gas, through underground water cooled condenser
10, become the liquid CO of low temperature after expansion valve 92, again return to fluid reservoir B20 and utilized for freezer, food processing center.
As shown in Fig. 2, from level-one gasifier（CU1）- 50 DEG C of 1 LNG temperature out passes through two level gasifier（CU2）20 will
Cold quantity transmission gives refrigerating medium ethylene glycol solution, the ethylene glycol solution of these low temperature to be stored in ethylene glycol cold storage tank 23 for storing
It is cold, central air-conditioner cooling water of this part cold storage capacity for air-conditioning system 27 in cooling stations.LNG passes through two level gasifier（CU2）
Substantially the NG for becoming 5 DEG C after 20, subsequently into gas ductwork.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of cold energy recovery system at small-sized LNG gasification station, it is characterised in that：Including level-one gasifier（1）, fluid reservoir A
（2）, three-way pipe one（4）, communicating pipe one（8）, condenser（10）, communicating pipe two（11）, carbon-dioxide gas compressor（12）, freezer steam
Send out device（15）, fluid reservoir C（16）, three-way pipe two（17）, fluid reservoir D（19）, fluid reservoir B（20）, two level gasifier（21）, cycle
Pipeline one（22）, ethylene glycol cold storage tank（23）, circulating line two（24）, ability of swimming refrigeration unit（25）, circulating line three（26）And
Air-conditioning system in standing（27）；The level-one gasifier（1）Outlet one and fluid reservoir A（2）Entrance connection, three-way pipe one（4）
Three nozzles respectively with fluid reservoir A（2）Outlet, fluid reservoir B（20）Entrance and condenser（10）Outlet, institute
State communicating pipe one（8）One end and communicating pipe two（11）One end with fluid reservoir B（20）Outlet, the communicating pipe one（8）
The other end and communicating pipe two（11）The other end with fluid reservoir C（16）Entrance connection, the communicating pipe one（8）With communicating pipe two
（11）On be mounted on freezer evaporator（15）, the three-way pipe two（17）Three nozzles respectively with fluid reservoir C（16）Go out
Mouth, fluid reservoir D（19）Entrance and condenser（10）Entrance connection, three-way pipe two（17）Pass through communicating pipe six（13）With it is cold
Condenser（10）Entrance connection, the carbon-dioxide gas compressor（12）Mounted on communicating pipe six（13）On, the level-one gasifier
（1）Outlet two and two level gasifier（21）Entrance connection, the two level gasifier（21）With ethylene glycol cold storage tank（23）It
Between be communicated with circulating line one（22）, the ethylene glycol cold storage tank（23）With ability of swimming refrigeration unit（25）Between be communicated with circulation pipe
Road two（24）, the ability of swimming refrigeration unit（25）With air-conditioning system in station（27）Between be communicated with circulating line three（26）.
2. the cold energy recovery system at small-sized LNG gasification station according to claim 1, it is characterised in that：The level-one gasification
Device（1）Refrigerating medium is R744, two level gasifier（21）Refrigerating medium is ethylene glycol solution.
3. the cold energy recovery system at small-sized LNG gasification station according to claim 1, it is characterised in that：The carbon dioxide
Compressor（12）For R744 frequency-changeable compressors.
4. the cold energy recovery system at small-sized LNG gasification station according to claim 1, it is characterised in that：The small-sized LNG gas
The cold energy recovery system for changing station further includes two three-way magnetic valves（7）, the communicating pipe one（8）With communicating pipe two（11）On pacify
Equipped with three-way magnetic valve（7）, described two three-way magnetic valves（7）Remaining nozzle with fluid reservoir B（20）Connection, each threeway
Solenoid valve（7）It is arranged at fluid reservoir B（20）With corresponding freezer evaporator（15）Between.
5. the cold energy recovery system at small-sized LNG gasification station according to claim 1, it is characterised in that：The small-sized LNG gas
The cold energy recovery system for changing station further includes four pipe electromagnetic valves（5）, the three-way pipe one（4）Pass through communicating pipe three（3）With storage
Flow container B（20）Entrance connection, three-way pipe one（4）Pass through communicating pipe four（6）With condenser（10）Outlet, the threeway
Pipe two（17）Pass through communicating pipe five（18）With fluid reservoir D（19）Entrance connection, the communicating pipe three（3）, communicating pipe four（6）、
Communicating pipe five（18）With communicating pipe six（13）On be mounted on pipe electromagnetic valve（5）.
6. the cold energy recovery system at small-sized LNG gasification station according to claim 4, it is characterised in that：The small-sized LNG gas
The cold energy recovery system for changing station further includes expansion valve（9）And two regulating valves（14）, the expansion valve（9）Mounted on communicating pipe four
（6）On, described two regulating valves（14）It is separately mounted to communicating pipe one（8）With communicating pipe two（11）On, each regulating valve（14）
It is respectively provided with corresponding freezer evaporator（15）And three-way magnetic valve（7）Between.
7. the cold energy recovery system at the small-sized LNG gasification station according to claim 1,4 or 5, it is characterised in that：It is described small-sized
The cold energy recovery system at LNG gasification station further includes automatic control system, and the automatic control system includes computer（28）And it is aobvious
Show device（29）, the display（29）With computer（28）Electrical connection, the computer（28）Carbon dioxide compression is controlled respectively
Machine（12）, two three-way magnetic valves（7）, four pipe electromagnetic valves（5）It opens and closes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820429838.6U CN207991061U (en) | 2018-03-28 | 2018-03-28 | The cold energy recovery system at small-sized LNG gasification station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820429838.6U CN207991061U (en) | 2018-03-28 | 2018-03-28 | The cold energy recovery system at small-sized LNG gasification station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974339A (en) * | 2019-04-09 | 2019-07-05 | 华南理工大学 | A kind of device and method using phase transformation coolant transmission LNG cold energy |
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2018
- 2018-03-28 CN CN201820429838.6U patent/CN207991061U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974339A (en) * | 2019-04-09 | 2019-07-05 | 华南理工大学 | A kind of device and method using phase transformation coolant transmission LNG cold energy |
| CN109974339B (en) * | 2019-04-09 | 2023-08-11 | 华南理工大学 | Device and method for transferring LNG cold energy by using phase-change refrigerant |
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