CN110285319A - A kind of liquid nitrogen recovery system and liquid nitrogen recovery method - Google Patents
A kind of liquid nitrogen recovery system and liquid nitrogen recovery method Download PDFInfo
- Publication number
- CN110285319A CN110285319A CN201910615395.9A CN201910615395A CN110285319A CN 110285319 A CN110285319 A CN 110285319A CN 201910615395 A CN201910615395 A CN 201910615395A CN 110285319 A CN110285319 A CN 110285319A
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- China
- Prior art keywords
- liquid nitrogen
- pipe
- nitrogen
- recovery system
- refrigerator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 334
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 167
- 239000007788 liquid Substances 0.000 title claims abstract description 113
- 238000011084 recovery Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 238000001816 cooling Methods 0.000 claims description 10
- 238000005138 cryopreservation Methods 0.000 claims description 7
- 238000004659 sterilization and disinfection Methods 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 230000002631 hypothermal effect Effects 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 claims description 5
- 230000001954 sterilising effect Effects 0.000 claims description 5
- 239000012472 biological sample Substances 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
- F17C5/04—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases requiring the use of refrigeration, e.g. filling with helium or hydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/005—Pipe-line systems for a two-phase gas-liquid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/014—Nitrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0107—Single phase
- F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0135—Pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0337—Heat exchange with the fluid by cooling
- F17C2227/0339—Heat exchange with the fluid by cooling using the same fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0337—Heat exchange with the fluid by cooling
- F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
- F17C2227/0353—Heat exchange with the fluid by cooling using another fluid using cryocooler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0367—Localisation of heat exchange
- F17C2227/0388—Localisation of heat exchange separate
- F17C2227/039—Localisation of heat exchange separate on the pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/04—Methods for emptying or filling
- F17C2227/041—Methods for emptying or filling vessel by vessel
- F17C2227/042—Methods for emptying or filling vessel by vessel with change-over from one vessel to another
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/032—Treating the boil-off by recovery
- F17C2265/033—Treating the boil-off by recovery with cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/032—Treating the boil-off by recovery
- F17C2265/037—Treating the boil-off by recovery with pressurising
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Abstract
The present invention relates to a kind of liquid nitrogen recovery systems, including liquid nitrogen container, heating device, booster pump, pressurized tank and refrigerator, the delivery outlet of liquid nitrogen container is connected by the input port of first pipe and heating device, the delivery outlet of heating device is connect by second pipe with spiral coil, spiral coil is wound in first pipe, one end of spiral coil is connected to second pipe, the other end of spiral coil is connected to the input terminal of third pipeline, the output end of third pipeline is connected to by booster pump with the input port of pressurized tank, the delivery outlet of pressurized tank is connected to by the 4th pipeline with the input port of refrigerator, the delivery outlet of refrigerator is connected to by the 5th pipeline with the input port of liquid nitrogen container.Liquid nitrogen recovery system liquid nitrogen of the invention can recycle, refrigerate that cost is relatively low.
Description
Technical field
The present invention relates to a kind of recovery system more particularly to a kind of liquid nitrogen recovery systems, moreover, it relates to the liquid
The liquid nitrogen recovery method of nitrogen recovery system.
Background technique
Deepfreeze mainly or by liquid nitrogen container is carried out to the storage of biological sample at present, when storage, operator's need
Biological sample is placed in cryopreservation tube, then cryopreservation tube is placed directly in liquid nitrogen container, is deposited with carrying out profound hypothermia to it
Storage.Since the liquid nitrogen volatilization in liquid nitrogen container is fast, and the gaseous nitrogen to volatilize is exhausted directly in atmosphere, does not have recycling function, therefore,
Existing storage mode can't be realized and be recycled to liquid nitrogen, and then improve the cost of refrigeration.
So those skilled in the art are it is necessary to design a kind of liquid nitrogen recovery device regarding to the issue above, to solve low temperature
The problem of storing nitrogen volatilization in equipment and recycling, realizes recycling for nitrogen, reduces and produce and use cost.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of liquid nitrogen to recycle, refrigerate cost compared with
Low liquid nitrogen recovery system.
Liquid nitrogen recovery system of the invention, including liquid nitrogen container, heating device, booster pump, pressurized tank and refrigerator, the liquid
The delivery outlet of nitrogen tank is connected by the input port of first pipe and heating device, the delivery outlet of heating device by second pipe with
Spiral coil connection, the spiral coil are wound in the first pipe, and one end of spiral coil is connected to second pipe, spiral
The other end of coil pipe is connected to the input terminal of third pipeline, and the output end of third pipeline is defeated by booster pump and the pressurized tank
Entrance connection, the delivery outlet of pressurized tank be connected tos by the 4th pipeline with the input port of refrigerator, and the delivery outlet of refrigerator passes through the
Five pipelines are connected to the input port of liquid nitrogen container.
Further, liquid nitrogen recovery system of the invention, the heating device are aluminium heat block.
Further, liquid nitrogen recovery system of the invention, the first pipe, second pipe, spiral coil, third pipeline
It is integrally formed.
Further, liquid nitrogen recovery system of the invention, the refrigerator are Stirling cryocooler.
Further, liquid nitrogen recovery system of the invention, further includes bracket, and the refrigerator is arranged on the bracket.
Further, liquid nitrogen recovery system of the invention, further includes valve member, and the valve member includes being set to liquid nitrogen
At tank input port into nitrogen valve, valve temperature sensor and the safety valve being connect with into nitrogen valve.
According to the above aspect of the present invention, the present invention has at least the following advantages: booster pump, pressurized tank, refrigerator and each pipeline are set
It sets, enables the nitrogen to volatilize from pressurized tank by high-temperature sterilization and pressurization is recycled in pressurized tank, and pass through refrigerator and freeze
It returns in liquid nitrogen container again afterwards, to realize recycling for liquid nitrogen, reduces the cost of consumption and the refrigeration of liquid nitrogen.Specific works
When, liquid nitrogen container internal storage cryopreservation tube, bottom is equipped with liquid nitrogen, and check valve, that is, liquid nitrogen container of gaseous nitrogen from liquid nitrogen upper end is defeated
It exports and volatilizees into first pipe, the gaseous nitrogen in first pipe is pre- by spiral coil after heating devices heat sterilizes
Cold, because spiral coil is arranged around first pipe, and the nitrogen temperature in first pipe is lower, therefore spiral coil is by the first pipe
Certain pre-cooling is obtained behind road, after gaseous nitrogen is by pre-cooling, then by booster pump pressurization, the nitrogen of pressurization enters interior oxygenous
Pressurized tank, after nitrogen enters pressurized tank, by stirling refrigeration output liquid phase nitrogen, the profound hypothermia liquid nitrogen of generation returns to liquid nitrogen again
In tank.
In conclusion liquid nitrogen recovery system liquid nitrogen of the invention can recycle, refrigerate that cost is relatively low.
A kind of liquid nitrogen recovery method of such as above-mentioned liquid nitrogen recovery system, comprising the following steps:
S11: liquid nitrogen container internal storage cryopreservation tube, bottom are equipped with liquid nitrogen, gaseous nitrogen from the check valve of liquid nitrogen upper end to
It volatilizees in first pipe；
S12: the gaseous nitrogen in first pipe passes through heating devices heat, and heating temperature is 100~200 DEG C；
S13: the gaseous nitrogen after high-temperature sterilization is pre-chilled by spiral coil；
S14: after gaseous nitrogen pre-cooling, then pass through booster pump pressurization；
S15: the nitrogen of pressurization enters oxygenous pressurized tank；
S16: after nitrogen enters pressurized tank, by refrigerator output liquid phase nitrogen, the profound hypothermia liquid nitrogen of generation enters liquid nitrogen container
In.
Further, liquid nitrogen recovery method of the invention, the heating temperature of heating device are 200 DEG C.
Liquid nitrogen recovery method through the invention recycles liquid nitrogen, improves the utilization rate of liquid nitrogen, reduces use
Cost.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is the three-dimensional structure diagram of liquid nitrogen recovery system；
Fig. 2 is the top view of liquid nitrogen recovery system；
Fig. 3 is the three-dimensional structure diagram of liquid nitrogen container；
Fig. 4 is the structural schematic diagram of the tank body of liquid nitrogen container；
Fig. 5 is the top view of rack.
Wherein, 1: tank body；2: access port；3: insulating tube；4: bellows；5: hollow flange；6: mounting plate；7: connecting tube；
8: screw rod；9: handwheel；10: connecting rod；11: rack；12: sliding block；13: guide groove；14: bearing；15: sealing ring；16: installation
Pipe；17: placement plate；18: partition；19: connecting plate；20: compartment；21: supporting plate；22: top cover；23: liquid nitrogen container；24: heating device；
25: booster pump；26: pressurized tank；27: refrigerator；28: first pipe；29: second pipe；30: spiral coil；31: third pipe
Road；32: the four pipelines；33: the five pipelines；34: bracket；35: into nitrogen valve；36: safety valve.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Referring to Fig. 1 to Fig. 5, a kind of liquid nitrogen recovery system of a preferred embodiment of the present invention, including liquid nitrogen container 23, heating dress
24, booster pump 25, pressurized tank 26 and refrigerator 27 are set, the delivery outlet of liquid nitrogen container passes through the input of first pipe 28 and heating device
The delivery outlet of mouth connection, heating device is connect by second pipe 29 with spiral coil 30, and spiral coil is wound in first pipe,
One end of spiral coil is connected to second pipe, and the other end of spiral coil is connected to the input terminal of third pipeline 31, third pipe
The output end in road is connected to by booster pump with the input port of pressurized tank, and the delivery outlet of pressurized tank passes through the 4th pipeline 32 and refrigerator
Input port connection, the delivery outlet of refrigerator is connected to by the 5th pipeline 33 with the input port of liquid nitrogen container.
The setting of booster pump, pressurized tank, refrigerator and each pipeline enables the nitrogen to volatilize from pressurized tank to be disappeared by high temperature
Malicious and pressurization is recycled in pressurized tank, and is returned in liquid nitrogen container again after being freezed by refrigerator, to realize the circulation of liquid nitrogen
It utilizes, reduces the cost of consumption and the refrigeration of liquid nitrogen.Wherein, first pipe, second pipe, spiral coil and third pipeline can one
Body formed, heating device is directly arranged at first pipe and second pipe junction, thus realize in pipeline liquid nitrogen it is indirect
Heating, in addition, first pipe can also by nitrogen is directly inputted into heating device inside and by heating device it is directly right
The mode of nitrogen heating realizes the disinfection to nitrogen.By spiral coil coiling in first pipe, i.e., first pipe passes through spiral
Coil pipe surrounds the inner cavity to be formed, so that spiral coil can be pre-chilled in the first pipe with colder temperature, with right
Nitrogen in spiral coil after disinfection is pre-chilled.The setting of refrigerator, so that the nitrogen exported from pressurized tank is passing through refrigeration
It is changed into low temperature liquid nitrogen after device refrigeration, when it is implemented, refrigerator is Stirling cryocooler, the working principle of liquid nitrogen recovery system
It is as follows:
Liquid nitrogen container internal storage cryopreservation tube, bottom are equipped with liquid nitrogen, check valve, that is, liquid nitrogen of the gaseous nitrogen from liquid nitrogen upper end
The delivery outlet of tank volatilizees into first pipe, and the gaseous nitrogen in first pipe passes through helical disk after heating devices heat sterilizes
Pipe pre-cooling, because spiral coil is arranged around first pipe, and the nitrogen temperature in first pipe is lower, therefore spiral coil is by the
Certain pre-cooling is obtained after one pipeline, after gaseous nitrogen is by pre-cooling, then by booster pump pressurization, the nitrogen of pressurization enters interior oxygen-containing
The pressurized tank of gas, after nitrogen enters pressurized tank, by stirling refrigeration output liquid phase nitrogen, the profound hypothermia liquid nitrogen of generation returns to again
In liquid nitrogen container.
Preferably, heating device is aluminium heat block.
The design achieves heating devices to the heating function of nitrogen.Specifically, first pipe and second pipe are integrated
Molding passes through the bottoming hole on aluminium heat block, which is combined to form by two aluminium blocks, and aluminium block is added by heating resistance wire
The mode of heat realizes heating, to realize the high-temperature sterilization to nitrogen.
Preferably, first pipe, second pipe, spiral coil, third pipeline are integrally formed.
Preferably, refrigerator is Stirling cryocooler.
Preferably, further including bracket 34, refrigerator is set on bracket.
Preferably, further include valve member, valve member includes at liquid nitrogen container input port into nitrogen valve 35, valve
Temperature sensor and the safety valve 36 being connect with into nitrogen valve.
When pressure is excessive in liquid nitrogen container, safety valve starts pressure release, to improve it using safe.
Preferably, the liquid nitrogen container includes tank body 1, the side wall of tank body is equipped with the access port 2 being connected to tank inner chamber,
Access port is provided with insulating tube 3 on the lateral surface of tank body, insulating tube is the tubular structure of both ends open, and insulating tube is interior
Side is corrugated, and one end of insulating tube is set on tank body.
The setting of insulating tube, reduce operator by access port access biological sample when the external conduction cooling of liquid nitrogen or
Outer bound pair liquid nitrogen it is thermally conductive.Since insulating tube has certain length, and its medial surface is corrugated, to increase leading for liquid nitrogen
Cold distance, and then the external conduction cooling effect of liquid nitrogen is reduced, reduce the consumption of liquid nitrogen.
Preferably, tank body, insulating tube are hollow structure, the inner sidewall of insulating tube is bellows 4.
The insulating tube of hollow structure further enhances the insulation effect of insulating tube, reduces the extraneous heat biography to liquid nitrogen
It leads.
The edge of access port is additionally provided with the hollow flange 5 of prominent tank surface, and one end of hollow flange and tank body are solid
Even.
The setting of hollow flange further reduces the consumption to liquid nitrogen.
Preferably, being provided with mounting plate 6 in tank body, the screw rod that bottom end passes through mounting plate and is threadedly coupled with connecting tube 7
8, the connecting rod 10 set on the handwheel of screw mandrel top 9, between connecting tube and tank body, be rotatablely arranged in connecting tube simultaneously
For placing the rack 11 of biological sample, the lateral surface of mounting plate and the medial surface of tank body are connected, and handwheel is located at mounting plate
Top, connecting tube are located at the lower section of mounting plate, and one end of connecting rod is connect with connecting tube, and the other end is connect with sliding block 12, sliding block
It is set on guide groove 13 or the guide rail on tank body inner sidewall.
The design allows the operator to easily access biological sample by access port.Due to the size of access port
It is relatively small, biological sample is accessed by access port in order to facilitate the operation of personnel, is provided with handwheel, screw rod, connecting tube, rack
Equal components.Specifically, handwheel is rotated first when operator needs to access sample, so that the screw rod rotation being connect with handwheel,
With the rotation of screw rod, the connecting tube connecting with wire rod thread is moved along screw rod, until the biological sample on rack is mobile
To height identical with access port, then operator rotates rack relative to connecting tube by manually mode, so that raw
Object sample turns to the position with access port face, and then sample can be taken out by access port or put sample by operator
On rack, last operation personnel close the lid on access port, very easy to use.Wherein connecting rod, sliding block, lead
The setting of slot or guide rail, so that connecting tube will not generate transfer when operator rotates handwheel.
Preferably, being provided with bearing 14 between screw rod and mounting plate, sealing ring 15 is provided with above bearing.
Preferably, rack include be sheathed on installing pipe 16 on the outside of connecting tube, be set to it is more on installing pipe side wall
Layer placement plate 17.
Preferably, being equipped with multiple partitions 18 in placement plate centered on installing pipe, the outer rim of placement plate is provided with muti-piece
Connect adjacent separator connecting plate 19, the connecting plate between adjacent separator and partition surround to be formed for place biological sample every
Between 20.
The setting of placement plate, partition, connecting plate realizes the function of rack, and multiple samples are retained separately
In in tank body.
Preferably, the bottom end of connecting tube is provided with supporting plate 21, the bottom end of installing pipe is located at the top of supporting plate, mounting plate
Top is provided with top cover 22.
The setting of supporting plate realizes the supporting role to rack, and the setting of top cover further enhances the leakproofness of tank body
Energy.
A kind of liquid nitrogen recovery method of such as above-mentioned liquid nitrogen recovery system, comprising the following steps:
S11: liquid nitrogen container internal storage cryopreservation tube, bottom are equipped with liquid nitrogen, gaseous nitrogen from the check valve of liquid nitrogen upper end to
It volatilizees in first pipe；
S12: the gaseous nitrogen in first pipe passes through heating devices heat, and heating temperature is 100~200 DEG C；
S13: the gaseous nitrogen after high-temperature sterilization is pre-chilled by spiral coil；
S14: after gaseous nitrogen pre-cooling, then pass through booster pump pressurization；
S15: the nitrogen of pressurization enters oxygenous pressurized tank；
S16: after nitrogen enters pressurized tank, by refrigerator output liquid phase nitrogen, the profound hypothermia liquid nitrogen of generation enters liquid nitrogen container
In.
Further, liquid nitrogen recovery method of the invention, the heating temperature of heating device are 200 DEG C.
Liquid nitrogen recovery method through the invention recycles liquid nitrogen, improves the utilization rate of liquid nitrogen, reduces use
Cost.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where spirit or essential attributes of the invention, those skilled in the art can realize this in other specific forms
Invention.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, the present invention
Protection scope be indicated by the appended claims rather than the foregoing description.
In addition, the above is only a preferred embodiment of the present invention, being not intended to restrict the invention, it is noted that right
For those skilled in the art, without departing from the technical principles of the invention, it can also make several
Improvement and modification, these improvements and modifications also should be regarded as protection scope of the present invention.Although it will also be appreciated that this specification
Be described in terms of embodiments, every embodiment includes only a single technical solution, specification it is this
Narrating mode is merely for the sake of clarity, and the skilled in the art should refer to the specification as a whole, in each embodiment
Technical solution may also be suitably combined to form that other embodiments which can be understood by those skilled in the art.
Claims (8)
1. a kind of liquid nitrogen recovery system, it is characterised in that: including liquid nitrogen container (23), heating device (24), booster pump (25), pressure
The delivery outlet of tank (26) and refrigerator (27), the liquid nitrogen container is connect by first pipe (28) with the input port of heating device,
The delivery outlet of heating device is connect by second pipe (29) with spiral coil (30), and the spiral coil is wound on first pipe
On road, one end of spiral coil is connected to second pipe, and the other end of spiral coil is connected to the input terminal of third pipeline (31),
The output end of third pipeline is connected to by booster pump with the input port of the pressurized tank, and the delivery outlet of pressurized tank passes through the 4th pipeline
(32) it is connected to the input port of refrigerator, the delivery outlet of refrigerator is connected to by the 5th pipeline (33) with the input port of liquid nitrogen container.
2. liquid nitrogen recovery system according to claim 1, it is characterised in that: the heating device is aluminium heat block.
3. liquid nitrogen recovery system according to claim 1, it is characterised in that: the first pipe, second pipe, helical disk
Pipe, third pipeline are integrally formed.
4. liquid nitrogen recovery system according to claim 1, it is characterised in that: the refrigerator is Stirling cryocooler.
5. liquid nitrogen recovery system according to claim 1, it is characterised in that: further include bracket (34), the refrigerator is set
It is placed on the bracket.
6. liquid nitrogen recovery system according to claim 1, it is characterised in that: it further include valve member, the valve member
Including be set at liquid nitrogen container input port into nitrogen valve (35), valve temperature sensor and the safety valve (36) being connect with into nitrogen valve.
7. a kind of liquid nitrogen recovery method of liquid nitrogen recovery system as described in claim 1, which is characterized in that including following step
It is rapid:
S11: liquid nitrogen container internal storage cryopreservation tube, bottom are equipped with liquid nitrogen, and gaseous nitrogen is from the check valve of liquid nitrogen upper end to first
It volatilizees in pipeline；
S12: the gaseous nitrogen in first pipe passes through heating devices heat, and heating temperature is 100~200 DEG C；
S13: the gaseous nitrogen after high-temperature sterilization is pre-chilled by spiral coil；
S14: after gaseous nitrogen pre-cooling, then pass through booster pump pressurization；
S15: the nitrogen of pressurization enters oxygenous pressurized tank；
S16: after nitrogen enters pressurized tank, by refrigerator output liquid phase nitrogen, the profound hypothermia liquid nitrogen of generation enters in liquid nitrogen container.
8. liquid nitrogen recovery system according to claim 7, it is characterised in that: the heating temperature of heating device is 200 DEG C.
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| CN110285319B (en) | 2024-04-26 |
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