CN209085139U - A kind of efficient liquefied natural gas vaporization phase change cold-storage device - Google Patents
A kind of efficient liquefied natural gas vaporization phase change cold-storage device Download PDFInfo
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- CN209085139U CN209085139U CN201821872617.2U CN201821872617U CN209085139U CN 209085139 U CN209085139 U CN 209085139U CN 201821872617 U CN201821872617 U CN 201821872617U CN 209085139 U CN209085139 U CN 209085139U
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- natural gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The utility model discloses a kind of efficient liquefied natural gas vaporization phase change cold-storage devices comprising: shell；It is arranged in the intracorporal heat exchange partition of the shell, for the shell to be divided into the first cavity and the second cavity；For being passed through the gas pipeline of liquefied natural gas, the heat exchange partition is passed through after protruding into first cavity, then stretch out from second cavity；Multiple phase change cold-storage spheres in second cavity are set；The first refrigerating medium is full of between first cavity and the gas pipeline；The second refrigerating medium is full of between second cavity and the gas pipeline, the phase change cold-storage sphere；The phase change cold-storage ball interior is filled with phase-change material.The vaporization efficency of liquefied natural gas can be improved in the utility model, while recycling the cold energy in gasification, energy saving.The apparatus structure is simple, is easily achieved, and can be widely applied to small liquid, compressed natural gas gasification station.
Description
Technical field
The utility model relates to heat exchange equipment fields, and in particular to a kind of efficient liquefied natural gas vaporization phase change cold-storage dress
It sets.
Background technique
Liquefaction, compressed natural gas (L-CNG) gas station are by carrying out pressurization gas to the liquefied natural gas being stored in groove tank
Change, and then automobile with compressed natural gas is filled.The vaporising device of current L-CNG gas station is mainly air temperature type and water-bath type
Vaporizer, summer gas outlet temperature highest can reach 15 DEG C, can be fed directly to compressed natural gas (CNG) storage cylinder
In, in the case where temperature is low or humidity is big, low-temperature condition natural gas damages CNG storage cylinder and aerating pipeline in order to prevent,
Water bath type vaporizer need to be used to carry out re-heat heating to natural gas.If vaporizer long operational time leads to its fin frosting, need
Switch vaporizer, is not easy to the operation of gas station；For air temperature type vaporizer, since its volume is larger, gas station
Higher cost is disposed, heat exchange efficiency is not high.In addition, LNG after vaporizer exchanges heat, wastes a large amount of cold energy, it is unfavorable for energy-saving ring
It protects.
Under the operating pressure of 25MPa, it is assumed that the working efficiency of a whole set of cold-storage device is 50%, liquefied natural gas (LNG) pin
The amount of selling is 50m3The average cold energy deliverability of the L-CNG gasification station 1d of/d is about 100kW, it is possible to provide the building of about 1000m2 is empty
Adjust refrigeration requirement.
Utility model content
The purpose of this utility model is in view of the above problems, in conjunction with air temperature type vaporizer and water bath type vaporizer
Feature proposes that a kind of efficient liquefied natural gas vaporization phase change cold-storage device recycles simultaneously to improve the vaporization efficency of LNG
Cold energy in gasification, it is energy saving.
A kind of in order to achieve the above object, the utility model provides efficient liquefied natural gas vaporization phase change cold-storage device,
It include: shell；It is arranged in the intracorporal heat exchange partition of the shell, for the shell to be divided into the first cavity and the second cavity；
It for being passed through the gas pipeline of liquefied natural gas, protrudes into after first cavity and passes through the heat exchange partition, then from described
Second cavity stretches out；Multiple phase change cold-storage spheres in second cavity are set；First cavity and the gas pipeline
Between be full of the first refrigerating medium, for absorbing the cold energy in liquefied natural gas；Second cavity and the gas pipeline, institute
It states full of the second refrigerating medium between phase change cold-storage sphere, for absorbing in the liquefied natural gas after the first refrigerating medium is vaporized with part
Cold energy；The phase change cold-storage ball interior is filled with phase-change material, for absorbing and storing the cold energy in the second refrigerating medium.
Above-mentioned efficient liquefied natural gas vaporization phase change cold-storage device, wherein further include being arranged outside the cold-storage device
The circulating pump in portion exchanges heat for that will absorb the second refrigerating medium after cold energy and external heat exchanger.
Above-mentioned efficient liquefied natural gas vaporization phase change cold-storage device, wherein the outside of the shell is coated with heat-insulated material
Material.
Above-mentioned efficient liquefied natural gas vaporization phase change cold-storage device, wherein the natural gas line is that inner and outer pipes are double-deck
Structure, and the collet between inner tube and inner and outer pipes is connected to.
Above-mentioned efficient liquefied natural gas vaporization phase change cold-storage device, wherein the gas pipeline is snake bend.
Above-mentioned efficient liquefied natural gas vaporization phase change cold-storage device, wherein the heat exchange partition has multiple grooves.
Above-mentioned efficient liquefied natural gas vaporization phase change cold-storage device, wherein first refrigerating medium is propane.
Above-mentioned efficient liquefied natural gas vaporization phase change cold-storage device, wherein second refrigerating medium is that ethylene glycol is water-soluble
Liquid.
Above-mentioned efficient liquefied natural gas vaporization phase change cold-storage device, wherein the material of the phase change cold-storage sphere is resistance to
Cold gum.
Above-mentioned efficient liquefied natural gas vaporization phase change cold-storage device, wherein the phase-change material is n-tetradecane.
Compared with the existing technology, the utility model has the following beneficial effects:
The vaporization effect of LNG can be improved in liquefied natural gas vaporizing apparatus provided by the utility model with cool storage function
Rate, while the cold energy in gasification is recycled, it is energy saving.The apparatus structure is simple, is easily achieved, and can be widely applied to small-sized
L-CNG gasification station.
Detailed description of the invention
Fig. 1 is the structure chart of an embodiment of the efficient liquefied natural gas vaporization phase change cold-storage device of the utility model.
Specific embodiment
Below in conjunction with attached drawing, by specific embodiment, the utility model will be further described, these embodiments are only used for
Illustrate the utility model, is not the limitation to scope of protection of the utility model.
As shown in Figure 1, cold-storage device includes the gas pipeline 1 being arranged in shell 3, exchange heat partition 4 and phase transformation storage
Cold sphere 5.The heat exchange partition 4 will be divided into two cavitys inside the shell 3, i.e. (heat exchange 4 top of partition is empty for the first cavity
Chamber) and the second cavity (heat exchange 4 lower cavity of partition)；The gas pipeline 1 protrudes into after first cavity across described
Exchange heat partition 4, then stretches out from second cavity.Gas pipeline 1 can be, but not limited to using U-tube road, snake bend.It
The quantity of right air pipe 1, which can according to need, is set as multiple.The gas pipeline 1 can be considered as including interconnected position
In the liquified natural gas line segments in the first cavity and the gaseous natural gas line segments in the second cavity.
The first refrigerating medium 2 is full of between first cavity and gas pipeline 1.First refrigerating medium 2 can be, but not limited to use
Propane of the evaporating temperature at -42 DEG C or so.It is suitable for flowing through the liquid in liquified natural gas in gaseous first refrigerating medium 2
The cold energy in liquified natural gas is absorbed when natural gas tube section, and liquified natural gas is made to be changed into gaseous natural gas.
Phase change cold-storage sphere 5 is provided in second cavity, it is internal to be filled with phase-change material.The phase change cold-storage sphere
5 be cold resistant rubber.Optionally, the phase-change material is n-tetradecane.The phase-change material is suitable for storage and flows through phase transformation storage
The cold energy of second refrigerating medium 6 of cold sphere 5.The quantity of phase change cold-storage sphere 5 is multiple in the cold-storage device.
The second refrigerating medium 6 is full of between second cavity and gas pipeline 1, phase change cold-storage sphere 5.Second refrigerating medium 6 can
With but be not limited to using glycol water, concentration is arranged according to actual needs.Second refrigerating medium 6, which is suitable for absorbing, to be flowed through
The cold energy of the natural gas of gaseous natural gas line segments and the first refrigerating medium 2 for flowing through heat transfer partition, flows through the liquid of heat exchange partition 4
The first refrigerating medium of state 2 is changed into gaseous state.Have on shell 3 for the first refrigerating medium 2 and the export of the second refrigerating medium 6 and imports normally closed
Opening.
LNG first passes through the liquified natural gas line segments, is vaporized by tube wall and the first refrigerating medium 2 heat exchange part.
Exothermic condensation is drop after gaseous first refrigerating medium 2 contacts tube wall, is dropped on heat exchange partition 4 by gravity.Liquid
The first refrigerating medium 2 exchange heat with heat exchange partition 4, absorb heat and vaporize.So that the cavity heat transfer process on heat exchange 4 top of partition is held
It is continuous to carry out.In one embodiment, heat exchange partition 4 can have downward rectangle or circular groove, so that condensed first carries
Cryogen 2 has bigger heat exchange area on heat exchange partition 4, improves vaporization rate, enhances the internal flow of cavity.
The natural gas that part vaporizes by the liquified natural gas line segments, into the gaseous natural gas pipeline
Section is further absorbed heat.The natural gas completely vaporized is flowed out through outlet, abundant released cold quantity.The second refrigerating medium 6 and the heat exchange of liquid
Partition 4 and the contact of gaseous state gas pipeline section, to absorb cooling capacity.The second refrigerating medium 6 for absorbing cooling capacity absorbs phase change cold-storage material
The heat of material, and cooling capacity is sufficiently stored in phase-change material.
The phase change cold-storage sphere 5 is cold resistant rubber material, and phase transition forms are liquid-solid-phase changeable, can effectively prevent phase transformation
When volume change cold-storage sphere is damaged.As it can be seen that the utility model is using the first refrigerating medium 2 in liquified natural gas
Cold energy in first refrigerating medium 2 and gaseous natural gas line segments is imported phase transformation material using the second refrigerating medium 6 by cold energy recycling
Material, convenient for the storage of cold energy.Not only directly store the cold energy in liquefied natural gas, also accelerate the vaporization of liquefied natural gas into
Journey reduces costs, and solves the problems, such as the frosting of usual heat exchanger.
In one embodiment, it is coated with heat-barrier material outside the shell 3, for realizing more preferably heat transfer effect.It can
Selection of land, the heat-barrier material coated are polyurethane material.
In one embodiment, the natural gas line is the heat exchanger tube of double-layer structure, and LNG is introduced into inner tube, then into
Enter the collet between inner and outer pipes.LNG in collet is directly heated and vaporizes immediately, and the LNG flowed in inner tube passes through collet
The LNG of middle vaporization is heated.Heat transfer rate is slowed down, prevents the refrigerating medium outside pipe from condensing.
In one embodiment, cold-storage device provided by the utility model further includes unillustrated circulating pump in Fig. 1, it is used for
The second refrigerating medium 6 after absorption cold energy is exchanged heat with external heat exchanger, so that cold energy be used.
In conclusion liquefied natural gas vaporization cold-storage device provided by the utility model, using gaseous first refrigerating medium 2
The cold energy in liquified natural gas is absorbed, the first refrigerating medium 2 after absorbing cold energy becomes liquid, is then absorbed by the second refrigerating medium 6
Cold energy in first refrigerating medium 2, the first refrigerating medium 2 after being absorbed cold energy become gaseous state, continue to exchange heat with liquified natural gas.Most
It is absorbed afterwards by phase-change material and stores the cold energy in the second refrigerating medium 6.As it can be seen that the utility model is right using the first refrigerating medium 2
Cold energy recycling in liquified natural gas, imports phase-change material for cold energy using the second refrigerating medium 6, convenient for the storage of cold energy.Not only
The cold energy in liquefied natural gas has been recycled, the vaporization process of liquefied natural gas has also been accelerated, reduces costs.
It is discussed in detail although the content of the utility model has passed through above preferred embodiment, but it should be appreciated that on
The description stated is not considered as limitations of the present invention.After those skilled in the art have read above content, for
A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the protection scope of the utility model should be by appended
Claim limit.
Claims (10)
1. a kind of efficient liquefied natural gas vaporization phase change cold-storage device characterized by comprising shell；It is arranged in the shell
Interior heat exchange partition, for the shell to be divided into the first cavity and the second cavity；For being passed through the natural of liquefied natural gas
Air pipe passes through the heat exchange partition after protruding into first cavity, then stretches out from second cavity；Setting is in the second sky
Intracavitary multiple phase change cold-storage spheres；The first refrigerating medium is full of between first cavity and the gas pipeline, for inhaling
Receive the cold energy in liquefied natural gas；Full of the between second cavity and the gas pipeline, the phase change cold-storage sphere
Two refrigerating mediums, for absorbing the cold energy in the liquefied natural gas after the first refrigerating medium is vaporized with part；The phase change cold-storage sphere
Inside is filled with phase-change material, for absorbing and storing the cold energy in the second refrigerating medium.
2. efficiently liquefied natural gas vaporization phase change cold-storage device as described in claim 1, which is characterized in that further include that setting exists
Circulating pump outside the cold-storage device exchanges heat for that will absorb the second refrigerating medium after cold energy and external heat exchanger.
3. efficiently liquefied natural gas vaporization phase change cold-storage device as described in claim 1, which is characterized in that outside the shell
Portion is coated with heat-barrier material.
4. efficiently liquefied natural gas vaporization phase change cold-storage device as described in claim 1, which is characterized in that the natural gas tube
Road is inner and outer pipes double-layer structure, and the collet between inner tube and inner and outer pipes is connected to.
5. efficiently liquefied natural gas vaporization phase change cold-storage device as described in claim 1, which is characterized in that the natural gas tube
Road is snake bend.
6. efficiently liquefied natural gas vaporization phase change cold-storage device as described in claim 1, which is characterized in that the heat exchange partition
With multiple grooves.
7. efficiently liquefied natural gas vaporization phase change cold-storage device as described in claim 1, which is characterized in that first refrigerating
Agent is propane.
8. efficiently liquefied natural gas vaporization phase change cold-storage device as described in claim 1, which is characterized in that second refrigerating
Agent is glycol water.
9. efficiently liquefied natural gas vaporization phase change cold-storage device as described in claim 1, which is characterized in that the phase change cold-storage
The material of sphere is cold resistant rubber.
10. efficiently liquefied natural gas vaporization phase change cold-storage device as described in claim 1, which is characterized in that the phase transformation material
Material is n-tetradecane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821872617.2U CN209085139U (en) | 2018-11-14 | 2018-11-14 | A kind of efficient liquefied natural gas vaporization phase change cold-storage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821872617.2U CN209085139U (en) | 2018-11-14 | 2018-11-14 | A kind of efficient liquefied natural gas vaporization phase change cold-storage device |
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| CN209085139U true CN209085139U (en) | 2019-07-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186157A (en) * | 2018-11-14 | 2019-01-11 | 国网上海市电力公司 | A kind of efficient liquefied natural gas vaporization phase change cold-storage device |
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2018
- 2018-11-14 CN CN201821872617.2U patent/CN209085139U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186157A (en) * | 2018-11-14 | 2019-01-11 | 国网上海市电力公司 | A kind of efficient liquefied natural gas vaporization phase change cold-storage device |
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