CN208222987U - Device for preparing fluid ice crystals by using L NG cold energy - Google Patents
Device for preparing fluid ice crystals by using L NG cold energy Download PDFInfo
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- CN208222987U CN208222987U CN201820434374.8U CN201820434374U CN208222987U CN 208222987 U CN208222987 U CN 208222987U CN 201820434374 U CN201820434374 U CN 201820434374U CN 208222987 U CN208222987 U CN 208222987U
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- bed
- gas
- ice crystal
- fluid ice
- cold energy
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- 239000013078 crystal Substances 0.000 title claims abstract description 49
- 239000012530 fluid Substances 0.000 title claims abstract description 48
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000007921 spray Substances 0.000 claims abstract description 23
- 238000010926 purge Methods 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 11
- 238000009835 boiling Methods 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 238000002386 leaching Methods 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 238000005507 spraying Methods 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000008676 import Effects 0.000 abstract description 2
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 58
- 239000003345 natural gas Substances 0.000 description 27
- 239000003949 liquefied natural gas Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000002309 gasification Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000009938 salting Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000533950 Leucojum Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Abstract
The utility model discloses an utilize L NG cold energy to prepare device of fluid ice crystal, including spraying the bed, the boiling bed, nitrogen gas opens and stops the purge system, vacuum pumping system, tube coupling system and control system, L NG import pipeline and the intercommunication of spraying bed below, it is hollow circular cylinder to spray the bed, upper and lower both ends have the toper head, it is equipped with spraying system to spray the inside top of bed, spraying system top is provided with the gas-solid separator, gas through the gas-solid separator separation rises to the gas vent at spraying bed top, and discharge through the first exhaust pipeline with the gas vent intercommunication, the sub-unit connection of NG return line and boiling bed is passed through to first exhaust pipeline, the NG that lets in the boiling bed among the NG return line, be provided with nitrogen gas on the return line and open the purge system, the utility model discloses ice making is fast, weak point consuming time, output is high, easy control, very big extremely strong electric energy has been saved, the industrialization prospect that has.
Description
Technical field
The utility model relates to a kind of device for producing fluid ice crystal, more particularly relate to a kind of produce using LNG cold energy
The device of fluid ice crystal belongs to comprehensive utilization of energy technical field.
Background technique
Fluid ice crystal is a kind of ice of novel concept different from conventional solid ice, it is a kind of ice of subcircular particle
Crystalline substance, both with the characteristic of fluid, available pipe is conveyed, and the characteristic with ice, and cooling fast, latent heat is big.
Fluidic ice crystal phase for traditional snowflake ice because have huge table (contact) area, superpower heat transfer property,
The performances such as constant temperature, the very fast cooling of energy and cooling can be kept, in fishery fishing, marine products processing, processing of poultry, fresh-keeping of vegetables, are surpassed
The fields such as city is fresh-keeping, (fermentation) industrial technology, ice-storage air-conditioning, artificial snow, downhole cooling have extensive Utilization prospects.
Currently, the manufacturing technology of fluid ice crystal is also a kind of completely new ice making skill different from conventional solid ice manufacturing technology
Art.Its principle is that cooling salting liquid reaches certain temperature, and moisture crystallization in solution is made to be precipitated as tiny spherical ice crystal and swim
From in solution, to form the ice slurry with mobility, under certain condition, the separation of ice crystal and liquid is realized, thus
Form pure solia particle ice crystal.
However the method for using cooling salting liquid manufacture fluidic ice needs to consume a large amount of electric energy, and this method is time-consuming
It is long, it is very slow to make fluid speed of icing, it is not easy to control, limits throughput is unfavorable for industrializing.
On the other hand, liquefied natural gas (LNG) is used as a kind of deep cooling (- 162 DEG C) liquid, belongs to high-grade cold source, as clear
Clean fuel by gasification and need to be heated to 15 DEG C or more just convenient for utilizing, discharge a large amount of cold energy in the process.
China's ten million ton of natural gas of annual umber of feed inlet, most imports in a manner of liquid shipping, this part number are huge
Cold energy be not utilized effectively, except small part is freezed for Air separation industry and icebox, a large amount of cold energy pass through heating of seawater gas
Change, not only wastes the energy, and polluted marine environment.
In Chinese national economy, refrigeration industry energy consumption accounts for about social terminal energy ground 10%, and energy consumption and energy-saving potential are huge
Greatly, therefore in society it is huge mobile cold source demand to can be convenient to safety, economy.In recent years, it is stored in building energy saving field ice
Cold in the ascendant, in summer, ice storage rationally utilizes the electric energy of night power grid electricity consumption trough to make ice, and puts that will save cold energy in the daytime
Out.But this method drawback low there is also refrigeration efficiency.
Utility model content
To solve the deficiencies in the prior art, it is released in the process the purpose of this utility model is to provide a kind of using LNG gasification
The cold energy put produces the device of fluid ice crystal, and the structure design of the utility model is reasonable, and process is simple, low in cost, produces stream
Body ice crystal it is high-efficient.
In order to achieve the above objectives, the utility model adopts the following technical solutions:
A kind of device for producing fluid ice crystal using LNG cold energy produces fluidic ice using the cold energy that LNG gasification process discharges
Crystalline substance, device include trickle bed, ebullated bed, nitrogen start and stop purge system, pumped vacuum systems, pipe connection system and control system,
Be connected to below LNG inlet ductwork and trickle bed, trickle bed is in hollow cylindrical, and upper and lower ends are with conical head, in trickle bed
Spray system is equipped with above portion, such setting may make water directly to contact with LNG, and spray head used in spray system has
There is low temperature resistant performance；It is provided with gas-solid separator above spray system, rises to spray by the gas that gas-solid separator separates
The exhaust outlet at the top of bed is drenched, and the first exhaust pipeline by being connected to exhaust outlet is discharged, first exhaust pipeline is flowed back by NG
The lower part of pipeline and ebullated bed connects, and the NG of ebullated bed is passed through in NG return line, and temperature is controlled at -35 DEG C ~ -50 DEG C.Boiling
One end that down-comer is connected at the top of bed is risen, the other end of down-comer is connected to the bottom of trickle bed, sets on NG return line
It is equipped with nitrogen start and stop purge system.
Further, first exhaust pipeline is also connected with one end of gas-gas heat exchanger, the other end connection of gas-gas heat exchanger
There is second exhaust pipeline, the hot fluid used in gas-gas heat exchanger is normal temperature air or low boiling working fluid, the cold flow used
Body is the cold natural gas of first exhaust pipeline discharge, and cold natural gas temperature after exchanging heat reaches room temperature.
Further, second exhaust pipe road is provided with pumped vacuum systems.
Further, the bottom of ebullated bed is connected with fluid ice crystal discharge line, is connected with shunt valve in the middle part of ebullated bed
One end, the other end of shunt valve is connected to the middle part of trickle bed, and shunt valve connects ebullated bed and trickle bed, is passed through trickle bed
Internal cold NG can help to form one layer of cold NG gas-bearing formation on trickle bed inner wall, and fluid ice crystal is prevented to be pasted onto the wall surface of trickle bed
On.
Further, spray system steam-out (SO) inlet ductwork.
Further, control system includes the first control valve being set on fluid ice crystal discharge line, is set to decline
The second control valve on pipe, the third control valve being set on NG return line, the 4th control being set in pumped vacuum systems
Valve, the 5th control valve for being set to second exhaust pipe road and the 6th control valve being set in LNG inlet ductwork, the first control
Valve processed also has tracing system, prevents the control valve in equipment running process from freezing.
On the one hand the utility model has the beneficial effect that the utility model gasifies and returns using liquefied natural gas (LNG)
High-grade cold energy is used to produce fluid ice crystal by the cold energy discharged in thermal process, also achieves more low-grade cold energy step benefit
With；And the temperature for the fluid ice crystal produced belongs to high-quality cold source between -40 DEG C to -50 DEG C.And due to fluid ice crystal
Design feature makes it possible to flowing, greatly facilitates transport and conveying.On the other hand, water by trickle bed directly and gas
Change natural gas (NG) contact, water directly mixes from the gaseous natural gas (NG) in spray system ejection and trickle bed and carries out hot friendship
It changes, moment can be frozen into ice crystal, icemaking rate is fast, and time-consuming short, yield is high, is easy to control, is greatly saved electric energy, has pole
Strong industrial prospect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model one embodiment.
In figure: 1- ebullated bed；2- down-comer；3-LNG inlet ductwork；4- steam inlet pipeline；5- spray system；6- gas-solid
Separator；7- first exhaust pipeline；8- pumped vacuum systems；9- second exhaust pipeline；10- gas-gas heat exchanger；11- nitrogen start and stop are blown
Sweep system；12-NG return line；13- shunt valve；The first return pipe of 14-；15- fluid ice crystal discharge line；16- trickle bed；
The first control valve of 17-；The second control valve of 18-；19- third control valve；The 4th control valve of 20-, the 5th control valve of 21-, 22- the 6th
Control valve.
Specific embodiment
Specific introduce is made to the utility model below in conjunction with the drawings and specific embodiments.
Embodiment 1
The utility model provides a kind of device that fluid ice crystal is produced using LNG cold energy, utilizes the release of LNG gasification process
Cold energy produces fluid ice crystal, and device includes trickle bed 16, ebullated bed 1, nitrogen start and stop purge system 11, pumped vacuum systems 8, pipeline
It is connected to below connection system and control system, LNG inlet ductwork 3 and trickle bed 16, trickle bed is in hollow cylindrical, upper and lower ends
With conical head, 16 inner upper of trickle bed is equipped with spray system 5, and such setting may make water directly to contact with LNG, and
Spray head used in spray system has low temperature resistant performance；Gas-solid separator 6 is provided with above spray system 5, by gas
The isolated gas of solid separator 6 rises to the exhaust outlet at the top of trickle bed, and the first exhaust pipeline 7 by being connected to exhaust outlet
Discharge, first exhaust pipeline 7 are connect by NG return line 12 with the lower part of ebullated bed 1, are passed through ebullated bed in NG return line
NG, temperature control at -35 DEG C ~ -50 DEG C.One end of down-comer 2, the other end of down-comer 2 are connected at the top of ebullated bed
It is connected to the bottom of trickle bed 16, nitrogen start and stop purge system 11 is provided on NG return line 12.First exhaust pipeline 7 also connects
It is connected to one end of gas-gas heat exchanger 10, the other end of gas-gas heat exchanger 10 is connected with second exhaust pipeline 9, in gas-gas heat exchanger
The hot fluid used is normal temperature air or low boiling working fluid, and the cold fluid used is that the cold day of first exhaust pipeline discharge is right
Gas, cold natural gas temperature after exchanging heat reach room temperature.Pumped vacuum systems 8 is provided on second exhaust pipeline 9.The bottom of ebullated bed 1
Portion is connected with fluid ice crystal discharge line 15, and the middle part of ebullated bed 1 is connected with one end of shunt valve 13, the other end of shunt valve 13
It is connected to the middle part of trickle bed 16, shunt valve connects ebullated bed and trickle bed, and being passed through the cold NG inside trickle bed can help
One layer of cold NG gas-bearing formation is formed on trickle bed inner wall, and fluid ice crystal is prevented to be pasted on the wall surface of trickle bed.The external steaming of spray system
Vapor inlet pipeline 4.Control system includes the first control valve 17 being set on fluid ice crystal discharge line 15, is set to down-comer
The second control valve 18 on 2, the third control valve 19 being set on NG return line, the 4th control being set in pumped vacuum systems
Valve 20, the 5th control valve 21 being set on second exhaust pipeline 9 and the 6th control being set in LNG inlet ductwork 3 processed
Valve 22, the first control valve 17 also have tracing system, prevent the control valve in equipment running process from freezing.
The application method of the utility model, including work step and stopping step, work step include the following:
1) open pumped vacuum systems, by trickle bed 16, ebullated bed 1, nitrogen start and stop purge system 11, pipe connection system and
Each valve in control system is evacuated to the explosion limit of methane, generally makes volume fraction of the methane in gaseous mixture low
In 4.9%；
2) nitrogen start and stop purge system 11 is opened, each pipeline and valve are purged, control purge flow rate is small flow, time root
It is determined according to engineering experience；It is then turned off the 5th control valve 21, opens the 6th control valve 22, makes circulation in nitrogen, until bypass
After one end temperature that pipe 13 is connected to trickle bed 16 reaches -100 DEG C, nitrogen start and stop purge system 11 is closed；
3) the 6th control valve 22 is opened, so that LNG enters trickle bed 16 from LNG inlet ductwork 3, then turns on spray system
5, with dampening after spraying in spray system, the LNG in trickle bed is contacted with water and the moment that exchanges heat is frozen into fluid ice crystal, fluid
Ice crystal is precipitated to trickle bed bottom under the effect of gravity；
4) when being accumulate to fluid ice crystal away from the one third of trickle bed bottom, the second control on down-comer 2 is opened
Valve 18, so that fluid ice crystal drains into inside ebullated bed 1 from trickle bed 16 through down-comer 2；
5) temperature that ebullated bed 1 is discharged into the fluid ice crystal of ebullated bed 1, by NG return line 12 is -35 DEG C ~ -55
DEG C NG and LNG exchange heat, LNG carries out gasification boiling, and in addition the NG in ebullated bed 1 is sent through shunt valve to trickle bed, then
Gas-gas heat exchanger 10 and NG return line 12 are drained into through first exhaust pipeline 7.
6) NG be discharged into after exchanging heat in gas-gas heat exchanger 10 to room temperature behind second exhaust pipe road 9 opened through the 4th control valve it is defeated
It send to user terminal.
7) fluid ice crystal is periodically discharged from the fluid ice crystal discharge line 15 of ebullated bed bottom, is packed into storage facilities.
Stop step include the following:
1) LNG inlet ductwork is closed；
2) when the LNG liquidus of trickle bed bottom reaches the fluid ice crystal ice line of trickle bed, spray system is closed, and open
Control valve on steam inlet pipeline 4, until after the residual water in spray system drains, the control in steam off inlet ductwork 4
Valve processed；
3) while opening the control valve on steam inlet pipeline 4, nitrogen start and stop purge system 11 is opened, is this moment small stream
Amount is opened, until increasing blowing for nitrogen start and stop purge system after the LNG and fluid ice crystal in trickle bed are fully entered in ebullated bed
Sweep flow；
4) after it is water that the fluid ice crystal in fluid ice crystal discharge line 15, which all melts, residual water is drained, and close stream
The first control valve 17 on body ice crystal discharge line, during fluid ice crystal discharge stream body ice crystal discharge line 15, heat tracing system
It unites always on, prevents the control valve in equipment running process from freezing.
5) nitrogen start and stop purge system is always on, until all control valves are closed after reaching room temperature.
The basic principles and main features and advantage of the utility model have been shown and described above.The technical staff of the industry
It should be appreciated that above-described embodiment does not limit the utility model in any form, it is all by the way of equivalent substitution or equivalent transformation
Technical solution obtained, all falls in the protection scope of the utility model.
Claims (6)
1. a kind of device for producing fluid ice crystal using LNG cold energy, including trickle bed (16), ebullated bed (1), nitrogen start and stop purging
System (11), pumped vacuum systems (8), pipe connection system and control system, it is characterised in that: LNG inlet ductwork (3) and spray
Connection below bed (16), trickle bed (16) inner upper are equipped with spray system (5), setting above the spray system (5)
There are gas-solid separator (6), rises to the exhaust outlet at the top of trickle bed by the gas that the gas-solid separator (6) separate, and lead to
First exhaust pipeline (7) discharge being connected to exhaust outlet is crossed, the first exhaust pipeline (7) passes through NG return line (12) and boiling
The lower part connection of bed (1) is risen, one end of down-comer (2), the other end of the down-comer (2) are connected at the top of the ebullated bed
It is connected to the bottom of trickle bed (16), is provided with nitrogen start and stop purge system (11) on the NG return line (12).
2. a kind of device for producing fluid ice crystal using LNG cold energy according to claim 1, it is characterised in that: described
One gas exhaust piping (7) is also connected with one end of gas-gas heat exchanger (10), and the other end of the gas-gas heat exchanger (10) is connected with
Two gas exhaust pipings (9).
3. a kind of device for producing fluid ice crystal using LNG cold energy according to claim 2, it is characterised in that: described
Pumped vacuum systems (8) are provided on two gas exhaust pipings (9).
4. a kind of device for producing fluid ice crystal using LNG cold energy according to claim 1, it is characterised in that: the boiling
The bottom for rising bed (1) is connected with fluid ice crystal discharge line (15), is connected with shunt valve (13) in the middle part of the ebullated bed (1)
The other end of one end, the shunt valve (13) is connected to the middle part of trickle bed (16).
5. a kind of device for producing fluid ice crystal using LNG cold energy according to claim 1, it is characterised in that: the spray
Leaching system steam-out (SO) inlet ductwork (4).
6. a kind of device for producing fluid ice crystal using LNG cold energy according to claim 1, it is characterised in that: the control
System processed includes the first control valve (17) being set on fluid ice crystal discharge line (15), be set on down-comer (2) the
Two control valves (18), the third control valve (19) being set on NG return line, the 4th control being set in pumped vacuum systems
Valve (20), the 5th control valve (21) being set on second exhaust pipeline (9) and be set on LNG inlet ductwork (3)
Six control valves (22), first control valve (17) also have tracing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820434374.8U CN208222987U (en) | 2018-03-28 | 2018-03-28 | Device for preparing fluid ice crystals by using L NG cold energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820434374.8U CN208222987U (en) | 2018-03-28 | 2018-03-28 | Device for preparing fluid ice crystals by using L NG cold energy |
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| Publication Number | Publication Date |
|---|---|
| CN208222987U true CN208222987U (en) | 2018-12-11 |
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ID=64504757
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820434374.8U Active CN208222987U (en) | 2018-03-28 | 2018-03-28 | Device for preparing fluid ice crystals by using L NG cold energy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332507A (en) * | 2018-03-28 | 2018-07-27 | 南京工业大学 | Device and method for preparing fluid ice crystals by using L NG cold energy |
-
2018
- 2018-03-28 CN CN201820434374.8U patent/CN208222987U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332507A (en) * | 2018-03-28 | 2018-07-27 | 南京工业大学 | Device and method for preparing fluid ice crystals by using L NG cold energy |
| CN108332507B (en) * | 2018-03-28 | 2023-07-25 | 南京工业大学 | Device and method for preparing fluid ice crystals by utilizing LNG cold energy |
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