CN106865670A - Using the freezing sea water desalinating unit system of heterogeneous sedimentation crystallization nucleation mode - Google Patents
Using the freezing sea water desalinating unit system of heterogeneous sedimentation crystallization nucleation mode Download PDFInfo
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- CN106865670A CN106865670A CN201710266564.3A CN201710266564A CN106865670A CN 106865670 A CN106865670 A CN 106865670A CN 201710266564 A CN201710266564 A CN 201710266564A CN 106865670 A CN106865670 A CN 106865670A
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- seawater
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/22—Treatment of water, waste water, or sewage by freezing
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Abstract
The present invention relates to freeze field of seawater desalination, more particularly to a kind of ice crystal of utilization particulate subsidence style is into nuclear refrigeration sea water desalinating unit system.Including refrigeration mechanism, particulate storage device, seawater freezing crystallizes ice-water separation device, waste seawater particle separator and fresh water particle separator, seawater freezing crystallization ice-water separation device includes two refrigerant fluid interchange shells, ice crystal conveyer belt and ice crystal scraper, the inside of refrigerant fluid interchange shell is provided with groove, two refrigerant fluid interchange shells are symmetrical arranged along its axis direction, ice crystal conveyer belt is located between two refrigerant fluid interchange shells, and along the axially arranged of refrigerant fluid interchange shell, the ice crystal scraper set along the axis direction of heat exchange shell is provided with refrigerant fluid interchange shell, the rotation direction of the ice crystal scraper in two refrigerant fluid interchange shells is opposite.The formation of " salt born of the same parents " during ice-crystal growth can not only effectively be suppressed, and further promote the growth of ice crystal in seawater, realize seawater freezing crystal desalination.
Description
Technical field
Patent of the present invention is related to freeze field of seawater desalination, more particularly to a kind of ice crystal nucleation of utilization particulate subsidence style
Freezing sea water desalinating unit system.
Background technology
Shortage of fresh water causes that seawater freezing desalinates the important channel for turning into and preparing fresh water.Ice is monomineralic rock, it is impossible to and
Other materials coexist, so water is in crystallization process, the automatic despumation of meeting, to keep its pure, freezing desalinization is just
It is using this principle.Ice crystal after washing, separation, thawing by obtaining fresh water.When freezing seawater, salinity is excluded in ice crystal
In addition, the ice crystal formation time is more long, and salinity is fewer, and this is to make some salinities during freezing due to seawater with salt born of the same parents
Mode is mixed between ice crystal, and " the salt born of the same parents " in ice sheet are the immediate causes higher into cryosel degree of seawater freezing method.Therefore, such as
What suppresses the formation of " salt born of the same parents " during ice-crystal growth, is a key issue for realizing seawater freezing crystal desalination.
Nucleation refers to be changed into solid phase (or liquid phase) under some of gas phase (or liquid phase) medium certain machining function of component
Process, realize mass transfer of the medium from gas phase (or liquid phase) to solid phase (or liquid phase).Homogeneous nucleation (or itself nucleation)
It is to cause that itself yardstick exceedes critical nucleation yardstick due to micel adsorption gas molecule in supersaturated system；It is heterogeneous into
Core be by external factor induced synthesis, system some regions preferentially, unevenly form nucleus.Heterogeneous forming core is usually hair
Life is on the surfaces such as container, pipeline or the surface of suspended impurity.In the actual crystallization process of solution, most heterogeneous nucleations occur
When, degree of supercooling is substantially smaller than homogeneous nucleation predicted value.The cold wall face of solution contact or fine particle etc., are to a certain extent ice
Brilliant nucleation provides required nucleating surface, plays a part of to be catalyzed nucleation.The ratio of nucleation generating process, nucleus volume and area
Value will increase, and nucleus solid phase is replaced part by nucleus and heterogeneous interface with liquid interface.
The content of the invention
It is higher into cryosel degree it is an object of the invention to solve the problems, such as to have seawater freezing method in the prior art, it is proposed that
A kind of freezing sea water desalinating unit system using heterogeneous sedimentation crystallization nucleation mode, can not only effectively suppress ice-crystal growth mistake
The formation of " salt born of the same parents " in journey, and further promote the growth of ice crystal in seawater, realize seawater freezing crystal desalination.
The technical scheme is that：A kind of freezing sea water desalinating unit system using heterogeneous sedimentation crystallization nucleation mode
System, including refrigeration mechanism, refrigeration mechanism include choke valve, auxiliary condenser, main condenser and compressor, compressor, main condenser
Device, auxiliary condenser and choke valve are sequentially connected, and choke valve is connected with seawater freezing crystallization ice-water separation device, wherein, also wrap
Include particulate storage device, seawater freezing crystallization ice-water separation device, waste seawater particle separator and fresh water particle separator；
The seawater freezing crystallization ice-water separation device includes two refrigerant fluid interchange shells, ice crystal conveyer belt and ice crystals
Scraper, the inside of refrigerant fluid interchange shell is provided with groove, and two refrigerant fluid interchange shells are symmetrical arranged along its axis direction, ice
Brilliant conveyer belt is located between two refrigerant fluid interchange shells, and along the axially arranged of refrigerant fluid interchange shell, refrigerant flowing
The ice crystal scraper set along the axis direction of heat exchange shell is provided with heat exchange shell, ice crystal scraper is fixed in ice crystal scraper rotary shaft,
The two ends of ice crystal scraper rotary shaft are separately positioned on refrigerant fluid interchange shell, and the ice crystal in two refrigerant fluid interchange shells is scraped
The rotation direction of knife to ice crystal conveyer belt direction conversely, rotate；
The outer side edges top of the refrigerant fluid interchange shell is provided with the particulate addition mouth of several axially spaced settings, system
Seawater inlet, ice crystal outlet, refrigerant outlet, waste seawater outlet II and refrigerant are additionally provided with cryogen fluid interchange shell
The outlet of entrance, refrigerant inlet and choke valve；
Waste seawater outlet II is connected with the entrance of waste seawater particle separator, and waste seawater particle separator is provided with useless sea
Water outlet I and particle outlet, particle outlet are connected with the entrance of particle reservoir；
Ice crystal outlet is connected with the ice crystal entrance of main condenser, liquid outlet and the fresh water particle separator of main condenser
Entrance connection, fresh water particle separator is provided with fresh water outlet and particle outlet, the particle outlet of fresh water particle separator
Connected with the entrance of particle reservoir；
The outlet of the particle reservoir is connected with the particle addition mouth of seawater freezing crystallization ice-water separation device；
The refrigerant outlet is connected with the air inlet of compressor.
The refrigerant fluid interchange shell is inclined to set along its axial direction, and its outer side edges is higher than inner side edge.Purpose is easy for
Ice crystal is scraped to conveyer belt.
The refrigerant fluid interchange shell is in circular arc, and the groove in refrigerant fluid interchange shell is deep-slotted chip breaker.
The particle can use micron order copper particle, micron order gold grain or micro nanometer silver particle.
The beneficial effects of the invention are as follows：
(1) using unique freezing sea water desalinating unit, particulate can not only be made to be sufficiently mixed sedimentation crystallization with seawater, and
Completion ice crystal is efficiently separated with waste seawater：In seawater and particulate injection seawater freezing crystallization ice-water separation device, by with it is outer
Ice crystal, is pushed into conveyer belt so that ice crystal is separated with waste seawater by refrigerant heat exchanger crystallization in shell using the rotation of ice crystal scraper.
(2) the heterogeneous application for settling into nuclear refrigeration seawater crystallization mode in device, can not only effectively suppress ice-crystal growth
During " salt born of the same parents " formation, and further promote seawater in ice crystal growth, realize seawater freezing crystal desalination.
(3) overall circulation system continuous ice-making, increases fresh water yield.By waterway circulating and kind of refrigeration cycle, and particulate
Separate the combination with feedway so that overall EGR can continuously generate fresh water.
Brief description of the drawings
Fig. 1 is attachment structure schematic diagram of the invention；
Fig. 2 is the front view that seawater freezing crystallizes ice-water separation device；
Fig. 3 is the left view that seawater freezing crystallizes ice-water separation device；
Fig. 4 is the top view that seawater freezing crystallizes ice-water separation device；
Fig. 5 is the A-A of Fig. 4 to sectional view.
In figure：1 particulate storage device；2 seawater inlets；3 waste seawater outlets I；4 waste seawater particle separators；5 seawater freezings
Crystallization ice-water separation device；6 choke valves；7 auxiliary condensers；8 main condensers；9 compressors；10 fresh water particle separators；11 is light
Water outlet；12 ice crystal outlets；13 refrigerant outlets；15 particulates add mouth；16 ice crystal scraper rotary shafts；17 ice crystals are transmitted
Band；18 refrigerant fluid interchange shells；19 waste seawater outlets II；20 refrigerant inlets；21 ice crystal scrapers；22 particulates；23 carry
The ice crystal of particulate.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, including particulate storage using the freezing sea water desalinating unit system of heterogeneous sedimentation crystallization nucleation mode
Device 1, seawater freezing crystallization ice-water separation device 5, waste seawater particle separator 4, fresh water particle separator 10 and refrigeration mechanism.System
Cold structure includes choke valve 6, auxiliary condenser 7, main condenser 8 and compressor 9, compressor 9, main condenser 8, auxiliary condenser
7 and choke valve 6 be sequentially connected, choke valve 6 and seawater freezing crystallization ice-water separation device 5 are connected, and kind of refrigeration cycle are formed, by system
Cryogen heat exchange provides cold for the seawater crystallization in seawater freezing crystallization ice-water separation device 5.
As shown in Figures 2 to 5, seawater freezing crystallization ice-water separation device 5 includes two refrigerant fluid interchange shells 18, ice
Brilliant conveyer belt 17 and ice crystal scraper 21.In the present embodiment, refrigerant fluid interchange shell 18 is in semi-cylindrical, is internally provided with semicircle
Connected in star, two refrigerant fluid interchange shells 18 are symmetrical arranged along its axis direction.Ice crystal conveyer belt 17 flows positioned at two refrigerants
Between heat exchange shell 18, and along the axially arranged of refrigerant fluid interchange shell 18.Refrigerant fluid interchange shell 18 is in axially to incline along it
Tiltedly set, its outer side edges is higher than inner side edge, it is therefore an objective to be easy to scrape ice crystal to conveyer belt 17.In refrigerant fluid interchange shell 18
The ice crystal scraper 21 set along the axis direction of heat exchange shell is provided with, ice crystal scraper 21 is fixed in ice crystal scraper rotary shaft 16, ice
The two ends of brilliant scraper rotary shaft 16 are separately positioned on refrigerant fluid interchange shell 18.The rotation direction phase of two ice crystal scrapers 21
Instead, rotated to the direction of ice crystal conveyer belt 17.Ice crystal scraper rotary shaft 16 rotates, and drives ice crystal scraper 21 to rotate, by ice crystal
Skates 21 scrape ice crystal 23 so that ice crystal 23 moves to ice crystal conveyer belt 17.When ice crystal scraper 21 will be scraped with fine-grained ice crystal 23
To conveyer belt 17, can constantly to particle and seawater is passed through in refrigerant fluid interchange shell 18, when ice crystal scraper
21 ice crystal is hung deliver on conveyer belt 17 after and during being rotated further, particle and seawater are crystallized under cold service, when
When ice crystal scraper 21 turns to the bottom of refrigerant fluid interchange shell 18 again, then the ice crystal that can continue will to be formed after crystallization scrape to
On conveyer belt.
The outer side edges top of refrigerant fluid interchange shell 18 is provided with multiple particulate addition mouths 15, and particulate adds mouth 15 along heat exchange
The axially spaced-apart of shell is set, and particulate 22 adds mouth 15 and enters in refrigerant fluid interchange shell 18 by particulate.While cold-producing medium stream
Move and seawater inlet 2, ice crystal outlet 12, refrigerant outlet 13, waste seawater outlet II 19 and system are additionally provided with hot shell 18
Cryogen entrance 20.Seawater is entered in refrigerant fluid interchange shell 18 by seawater inlet 2, refrigerant inlet 20 and choke valve 6
Outlet, refrigerant is entered in refrigerant fluid interchange shell 18 by refrigerant inlet 20, and after refrigeration terminates, refrigerant passes through
Refrigerant outlet 13 is discharged.Seawater and particle 22 mixing in refrigerant fluid interchange shell 18, while in the cooling of refrigerant
Under effect, crystallized by heterogeneous sedimentation nucleation mode, during ice-crystal growth, needle-like ice crystal the lowest point salinity is higher than sea
Water body concentration, the mass-transfer efficiency of salinity is relatively low so that the lowest point is difficult crystallization, and it is highly concentrated to be settled down to the discharge of ice crystal the lowest point using particulate
Degree salt solution, and by microparticle surfaces be ice crystal nucleation provide necessary to nucleating surface, play a part of catalysis nucleation, can not only
The formation of " salt born of the same parents " during enough effectively suppression ice-crystal growths, and further promote the growth of ice crystal in seawater, realize sea
Water freezing and crystallizing desalination mode.After crystallization process terminates, the ice crystal 23 with particle is discharged by ice crystal outlet 12, remaining
Seawater is discharged by waste seawater outlet 19.
The waste seawater outlet II 19 of seawater freezing crystallization ice-water separation device 5 and the entrance of waste seawater particle separator 4
Connection, waste seawater particle separator 4 is provided with waste seawater outlet I 3 and particle outlet, particle outlet and particle reservoir 1
Entrance is connected, and the seawater obtained after being separated through waste seawater particle separator 4 is discharged by waste seawater outlet I 3, and particle is then direct
Into in particle reservoir 1.
The ice crystal outlet 12 of seawater freezing crystallization ice-water separation device 5 is connected with the ice crystal entrance of main condenser 8, and master is cold
The liquid outlet of condenser 8 is connected with the entrance of fresh water particle separator 10, and fresh water particle separator 10 is provided with fresh water outlet
11 and particle outlet, the particle outlet of fresh water particle separator 10 is connected with the entrance of particle reservoir 1.Ice crystal with particle
23 flow out along ice crystal outlet 12, into main condenser 8, can heat release, the ice with particle in the course of work of main condenser 8
Brilliant 23 heat absorption is melted, and is flowed out from main condenser 8 together with particle, and is entered in fresh water particle separator 10, through fresh water particle
Fresh water after separator 10 is separated is discharged along fresh water outlet 11, and particle then enters in particle reservoir 1.
In the present invention, the outlet of particle reservoir 1 connects with the particle addition mouth 15 of seawater freezing crystallization ice-water separation device 5
It is logical, it is achieved thereby that particle recycling in the entire system.Particle in the present invention is micron order, can settle, can be separated,
Can heterogeneous nucleation particle, typically can be using micron order copper particle, micron order gold grain or micro nanometer silver particle etc..
The refrigerant outlet 13 of refrigerant fluid interchange shell 18 is connected with the air inlet of compressor 9, it is achieved thereby that system
Recycling of the cryogen in the system.
The course of work of the invention is as described below：By in particle 16 and seawater injection refrigerant fluid interchange shell 18, making
Crystallized by heterogeneous sedimentation nucleation mode under the refrigeration of cold structure, it is heavy using particulate in the growth course of ice crystal
Be down to ice crystal the lowest point discharge high concentration salt solution, and by microparticle surfaces be ice crystal nucleation provide necessary to nucleating surface, play
The effect of nucleation is catalyzed, can not only effectively suppress the formation of " salt born of the same parents " during ice-crystal growth, and further promote seawater
The growth of middle ice crystal, realizes seawater freezing crystal desalination mode.After crystallization process terminates, the ice crystal 23 with particle passes through ice
Brilliant outlet 12 is discharged, and by the heating and the separation of fresh water particle separator 10 of main condenser 9, reclaims fresh water, remaining
Grain is recycled in particulate storage device 1；Remaining seawater and particle are discharged by waste seawater outlet II 19, through waste seawater particulate point
After the separation of device 4, waste seawater is discharged, and remaining particle is recycled in particulate storage device 1；Remaining refrigerant is then transported to
In compressor 9, circularly cooling is continued to participate in.
Claims (4)
1. a kind of freezing sea water desalinating unit system using heterogeneous sedimentation crystallization nucleation mode, including refrigeration mechanism, refrigeration machine
Structure includes choke valve (6), auxiliary condenser (7), main condenser (8) and compressor (9), compressor (9), main condenser (8), auxiliary
Condenser (7) and choke valve (6) is helped to be sequentially connected, it is characterised in that：Also include particulate storage device (1), seawater freezing crystal ice
Water separation device (5), waste seawater particle separator (4) and fresh water particle separator (10), choke valve (6) are crystallized with seawater freezing
Ice-water separation device (5) is connected；
The seawater freezing crystallizes ice-water separation device (5) includes two refrigerant fluid interchanges shell (18), ice crystal conveyer belts
(17) and ice crystal scraper (21), the inside of refrigerant fluid interchange shell (18) is provided with groove, two refrigerant fluid interchanges shell (18)
Be symmetrical arranged along its axis direction, ice crystal conveyer belt (17) between two refrigerant fluid interchanges shell (18), and along refrigerant
Axially arranged, the interior ice being provided with along the axis direction setting of heat exchange shell of refrigerant fluid interchange shell (18) of fluid interchange shell (18)
Brilliant scraper (21), ice crystal scraper (21) is fixed on ice crystal scraper rotary shaft (16), the two ends point of ice crystal scraper rotary shaft (16)
It is not arranged in refrigerant fluid interchange shell (18), the rotation side of the ice crystal scraper (21) in two refrigerant fluid interchanges shell (18)
To conversely, being rotated to ice crystal conveyer belt (17) direction；
The outer side edges top of the refrigerant fluid interchange shell (18) is provided with the particulate addition mouth of several axially spaced settings
(15), be additionally provided with refrigerant fluid interchange shell (18) seawater inlet (2), ice crystal outlet (12), refrigerant outlet (13),
The outlet of waste seawater outlet II (19) and refrigerant inlet (20), refrigerant inlet (20) and choke valve (6)；
Waste seawater outlet II (19) is connected with the entrance of waste seawater particle separator (4), and waste seawater particle separator sets on (4)
There are waste seawater outlet I (3) and particle outlet, particle outlet is connected with the entrance of particle reservoir (1)；
Ice crystal outlet (12) is connected with the ice crystal entrance of main condenser (8), liquid outlet and the fresh water particulate of main condenser (8)
The entrance connection of separator (10), fresh water particle separator (10) is provided with fresh water outlet (11) and particle outlet, and fresh water is micro-
The particle outlet of grain separator (10) is connected with the entrance of particle reservoir (1)；
The outlet of the particle reservoir (1) is added mouth (15) and is connected with the particle of seawater freezing crystallization ice-water separation device (5)；
The refrigerant outlet (13) connects with the air inlet of compressor (9).
2. according to claim 1 using the heterogeneous freezing sea water desalinating unit system for settling crystallization nucleation mode, it is special
Levy and be：The refrigerant fluid interchange shell (18) is inclined to set along its axial direction, and its outer side edges is higher than inner side edge.
3. according to claim 1 using the heterogeneous freezing sea water desalinating unit system for settling crystallization nucleation mode, it is special
Levy and be：The refrigerant fluid interchange shell (18) is deep-slotted chip breaker in circular arc, the groove in refrigerant fluid interchange shell (18).
4. according to claim 1 using the heterogeneous freezing sea water desalinating unit system for settling crystallization nucleation mode, it is special
Levy and be：The particle uses micron order copper particle, micron order gold grain or micro nanometer silver particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710266564.3A CN106865670B (en) | 2017-04-21 | 2017-04-21 | Freezing seawater desalination device system using heterogeneous sedimentation crystallization nucleation mode |
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| CN201710266564.3A CN106865670B (en) | 2017-04-21 | 2017-04-21 | Freezing seawater desalination device system using heterogeneous sedimentation crystallization nucleation mode |
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Cited By (4)
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|---|---|---|---|---|
| CN107720866A (en) * | 2017-11-17 | 2018-02-23 | 青岛科技大学 | A kind of continous way seawater freezing desalting plant |
| CN108421277A (en) * | 2018-04-04 | 2018-08-21 | 清华大学 | A method of the system and its enrichment salt lake bittern of enrichment salt lake bittern |
| CN112108086A (en) * | 2020-09-24 | 2020-12-22 | 上海理工大学 | Directional solidification segregation device and method for colloidal particle system |
| CN115925040A (en) * | 2023-03-13 | 2023-04-07 | 山东科技大学 | High-salinity water treatment process and system based on cyclone reinforcement |
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| CN206901810U (en) * | 2017-04-21 | 2018-01-19 | 中国海洋大学 | Utilize the freezing sea water desalinating unit system of heterogeneous sedimentation crystallization nucleation mode |
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| JP2003287325A (en) * | 2002-03-28 | 2003-10-10 | Shin Nippon Air Technol Co Ltd | Freeze-concentration method, and device for the same |
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| CN115925040B (en) * | 2023-03-13 | 2023-05-26 | 山东科技大学 | High-salinity water treatment process and system based on cyclone reinforcement |
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