CN113697898A - Seawater desalination and ice cold-storage coupled system - Google Patents
Seawater desalination and ice cold-storage coupled system Download PDFInfo
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- CN113697898A CN113697898A CN202111120496.2A CN202111120496A CN113697898A CN 113697898 A CN113697898 A CN 113697898A CN 202111120496 A CN202111120496 A CN 202111120496A CN 113697898 A CN113697898 A CN 113697898A
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- 239000013535 sea water Substances 0.000 title claims abstract description 34
- 238000003860 storage Methods 0.000 title claims abstract description 34
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 33
- 239000013078 crystal Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000003507 refrigerant Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 10
- 238000007790 scraping Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
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- 238000000034 method Methods 0.000 description 15
- 238000007710 freezing Methods 0.000 description 6
- 230000008014 freezing Effects 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 239000013505 freshwater Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000011033 desalting Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
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- 238000010521 absorption reaction Methods 0.000 description 1
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- 230000005494 condensation Effects 0.000 description 1
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- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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- 238000005406 washing Methods 0.000 description 1
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Classifications
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C1/00—Producing ice
- F25C1/12—Producing ice by freezing water on cooled surfaces, e.g. to form slabs
- F25C1/14—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes
- F25C1/145—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes from the inner walls of cooled bodies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C5/00—Working or handling ice
- F25C5/18—Storing ice
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C2301/00—Special arrangements or features for producing ice
- F25C2301/002—Producing ice slurries
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C2400/00—Auxiliary features or devices for producing, working or handling ice
- F25C2400/10—Refrigerator units
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
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Abstract
The invention provides a seawater desalination and ice storage coupling system, which comprises a centrifugal machine, wherein the centrifugal machine comprises a box body, a cover body, a rotary drum, a centrifugal motor, a spiral scraper and an operating mechanism, a centrifugal liquid inlet hole is formed in the cover body, a plurality of through holes are formed in the side wall of the rotary drum, the upper end of the spiral scraper is fixedly connected or integrally connected with a discharge rod, the cross sections of the discharge rod and the spiral scraper are V-shaped or U-shaped, a centrifugal discharge hole connected with the discharge rod is formed in the upper part of the box body, and a drain hole communicated with the inner cavity of the box body is formed in the lower part of the box body. Through setting up helical tube and ejection of compact pole, can be at the extraction of complete ice crystal under the condition of centrifuge not stop work, efficiency is higher relatively, through the ice to after the centrifugation desalination save, realizes the transfer of cold energy in time and space, can effectually absorb the electricity that can send out at the renewable energy, also can carry out the cover advantage according to the difference of peak low ebb electricity.
Description
Technical Field
The invention relates to a water treatment and energy gradient utilization system, in particular to a seawater desalination and ice storage coupling system.
Background
The seawater desalination is an open source increment technology for realizing water resource utilization, and is inevitably and vigorously developed in the future, and common seawater desalination methods mainly comprise a distillation method, a reverse osmosis method and a freezing method, wherein the conventional freezing method mainly comprises the steps of cooling seawater at a low temperature to freeze, separating, washing and melting ice crystals to obtain fresh water, the ice crystal separation mainly adopts a gravity method for desalination, the separation efficiency is relatively low, and the fresh water is required to be used for removing salt-containing water on the surfaces of the ice crystals after desalination, so that the seawater desalination efficiency is influenced. In addition, with the development of a renewable energy power generation system, energy storage is an important method for improving random power generation consumption, wherein ice storage plays an important role in building energy conservation and is one of main trends of future development, however, the existing seawater desalination system does not have an energy storage function, the desalination cost restricts the development, and the product competitiveness is relatively low.
Chinese patent application publication No. CN112299521A discloses a centrifugal apparatus for seawater desalination, which can increase the separation speed of salt and ice crystals to a certain extent, however, after the separation process is completed, the apparatus needs to be stopped to take out the ice crystals, and the taken out ice crystals also need to use fresh water to remove salt-containing water on the surfaces of the ice crystals, which affects the efficiency, and the cold energy of the ice crystals is not fully utilized.
In addition, the traditional freezing method mainly takes the block ice as a research object, and as the heat conductivity coefficient of the ice is low, the preparation efficiency of the block ice is low and the energy consumption is large along with the increase of the thickness of an ice layer, so that the seawater desalination system adopting the traditional freezing method has relatively low efficiency and relatively large energy consumption.
In view of the above, the applicant has made intensive studies to solve the above problems and has made the present invention.
Disclosure of Invention
The invention aims to provide a seawater desalination and ice storage coupling system with relatively high efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
a seawater desalination and ice storage coupling system comprises an ice maker and a centrifugal machine which are sequentially connected, wherein the centrifugal machine comprises a box body, a cover body, a rotary drum, a centrifugal motor, a spiral scraper and an operating mechanism, the upper end of the box body is provided with an opening, the cover body covers the box body, the rotary drum is vertically arranged and is rotatably connected into an inner cavity of the box body, the centrifugal motor is used for driving the rotary drum to rotate, the spiral scraper is arranged in the rotary drum, the operating mechanism is used for driving the spiral scraper to be clung to or far away from the inner side wall of the rotary drum, a centrifugal liquid inlet hole is formed in the cover body and is communicated with the inner cavity of the box body, the centrifugal liquid inlet hole is connected with the ice maker, a plurality of through holes are formed in the side wall of the rotary drum, the upper end of the spiral scraper is fixedly connected or integrally connected with a discharge rod positioned at the upper end of the rotary drum, the cross sections of the discharge rod and the spiral scraper are both in a V shape or U shape, and a centrifugal discharge hole connected with the discharge rod is formed in the upper part of the box body, the lower part of the box body is provided with a drain hole communicated with the inner cavity of the box body,
as an improvement of the invention, the ice maker uses a suspension ice crystal method to make ice efficiently, and comprises an outer cylinder body, an inner cylinder body arranged in the outer cylinder body, a stirring rod which is inserted in the inner cylinder body and is coaxially arranged with the inner cylinder body, a stirring motor used for driving the stirring rod to rotate, and a scraping plate which is fixedly connected to the stirring rod and is used for scraping ice crystals adhered to the inner wall of the inner cylinder body, wherein a closed refrigerant channel is arranged between the outer cylinder body and the inner cylinder body, a refrigerant input joint communicated with the refrigerant channel and an ice making liquid outlet joint communicated with the inner cylinder body are arranged at the upper part of the outer cylinder body, and a refrigerant output joint communicated with the refrigerant channel and an ice making liquid inlet joint communicated with the inner cylinder body are arranged at the lower part of the outer cylinder body.
As an improvement of the invention, a salinity meter is connected on the centrifugal discharge hole and is in direct or indirect communication connection with the centrifugal motor.
As an improvement of the invention, the ice making machine further comprises a precooling heat exchanger, wherein a cold medium inlet of the precooling heat exchanger is communicated with the drain hole, and a water outlet of the precooling heat exchanger is connected with the ice making machine.
The improved ice storage box further comprises an ice storage box, the upper end of the ice storage box is provided with an ice storage inlet hole communicated with the centrifugal discharging hole, and the lower portion of the side wall of the ice storage box is provided with a chilled water outlet.
As an improvement of the invention, the chilled water outlet is connected with a water using device, the water using device is provided with a return pipe, and the upper part of the inner cavity of the refrigerator is provided with a spray pipe connected with the return pipe.
By adopting the technical scheme, the invention has the following beneficial effects:
1. through setting up helical tube and ejection of compact pole, can be at the extraction of complete ice crystal under the condition that centrifuge does not stop work, efficiency is higher relatively, simultaneously because centrifuge does not stop work, and the ice crystal surface does not have salt solution, need not to use fresh water to get rid of the salt solution on ice crystal surface, has further improved seawater desalination efficiency.
2. The ice maker adopted by the invention is not easy to agglomerate because the ice maker is continuously stirred in the ice making process, so that the obtained ice is fluid ice, the thermal resistance of the ice-water mixing end is almost zero, the ice maker can quickly exchange heat with a refrigerating working medium, the heat exchange efficiency is high, and the ice making time is short; in addition, because the ice crystal volume is small, the desalting process is equivalent to the separation of the salt on the surface, and therefore, the desalting effect is better under the condition of the same rotating speed and centrifugal time.
3. According to the ice maker, water flows from bottom to top, the refrigeration working medium flows from top to bottom, and the generated ice crystals are automatically gathered to the top by the principle that the density of the ice crystals is smaller than the density of water, so that the layering of ice slurry with high ice content and ice slurry with low ice content can be effectively realized, and the continuous output of the ice slurry can be realized by discharging the ice slurry from the upper part.
4. The heat storage refrigerator adopts the principle that ice floats on the water surface, backflow water is sprayed through the upper part, and frozen water is discharged from the lower part, so that water flushes ice crystals, heat conduction and heat exchange are replaced by convection heat exchange, and rapid heat exchange is realized.
5. The ice-melting process of the freezing method is combined with the cold accumulation, the ice maker has two purposes, so that the system is more compact and has higher application value, in addition, the coupling of seawater desalination and cold accumulation is realized, the arbitrage of power grid peak and valley electricity or the absorption of renewable energy power generation is realized, and the seawater desalination cost is reduced.
6. Through storing the ice after the centrifugal desalination, realize the transfer of cold energy in time and space, can be effectual can be in the electricity that the renewable energy source was generated and absorb, also can carry out the arbitrage according to the difference of peak valley electricity.
7. The energy gradient utilization in the desalination process is beneficial to improving the energy utilization rate of the system, reducing the comprehensive cost of the system and improving the product competitiveness.
Drawings
FIG. 1 is a schematic structural diagram of a seawater desalination and ice storage coupled system of the present invention;
FIG. 2 is a schematic sectional view of the ice maker according to the present invention;
FIG. 3 is a schematic sectional view of the centrifuge of the present invention, with parts omitted;
FIG. 4 is a schematic structural diagram of a drum and its mating parts according to the present invention;
FIG. 5 is a schematic view illustrating a structure of a refrigerator according to the present invention.
The designations in the figures correspond to the following:
10-an ice maker; 11-an outer cylinder;
12-an inner cylinder; 13-a stirring rod;
14-a stirring motor; 15-a scraper;
16-a refrigerant channel; 17-refrigerant input connection;
18-ice making liquid outlet joint; 19-refrigerant outlet connection;
20-a centrifuge; 21-a box body;
22-a cover body; 23-rotating the drum;
24-a spiral scraper; 25-an operating mechanism;
26-centrifuging a liquid inlet hole; 27-a salinity meter;
28-a discharge bar; 29 centrifugal discharge holes;
30-a precooling heat exchanger; 40-refrigerator storage;
41-ice storage liquid inlet hole; 42-chilled water outlet;
43-a shower pipe; 50-water using equipment;
61-an ice-making liquid inlet joint; 62-a drain hole;
63-a controller; 64-melter.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
As shown in fig. 1 to fig. 5, the present embodiment provides a coupling system for seawater desalination and ice storage, which includes an ice maker 10 and a centrifuge 20 connected in sequence, and further includes a precooling heat exchanger 30 and an ice storage tank 40 connected to the centrifuge 20 respectively.
The ice maker 10 comprises an outer cylinder 11, an inner cylinder 12 arranged in the outer cylinder 11, a stirring rod 13 inserted in the inner cylinder 12 and arranged coaxially with the inner cylinder 12, a stirring motor 14 for driving the stirring rod 13 to rotate, and a scraper 15 fixedly connected to the stirring rod 13 for scraping ice crystals adhered to the inner wall of the inner cylinder 12, wherein the specific transmission connection structure between the stirring motor 14 and the stirring rod 13 is a conventional structure, such as a coupling connection and the like. A closed refrigerant channel 16 is arranged between the outer cylinder body 11 and the inner cylinder body 12, and the refrigerant channel 16 is preferably a spiral channel; the upper part of the outer cylinder 11 is provided with a refrigerant input joint 17 communicated with the upper end of the refrigerant channel 16 and an ice making liquid outlet joint 18 communicated with the inner cylinder 12, the lower part of the outer cylinder 11 is provided with a refrigerant output joint 19 communicated with the lower end of the refrigerant channel 16 and an ice making liquid inlet joint 61 communicated with the inner cylinder 12, and preferably, the ice making liquid inlet joint 61 is positioned at the bottom of the outer cylinder 11. In use, liquid refrigerant flows in from the refrigerant inlet joint 17 which is relatively located above and flows out from the refrigerant outlet joint 19 which is relatively located below in a gaseous state, so that heat in seawater is taken away, and part of seawater is frozen. Of course, the ice maker 10 may further include components such as a heat exchange pipe, and the structures and the connection manners of the components are the same as those of the conventional ice maker 10, which is not the focus of the embodiment and will not be described in detail herein. By continuously stirring in the ice making process, agglomeration can be avoided, and fluid ice is obtained.
The centrifuge 20 comprises a box 21 with an opening at the upper end, a cover 22 covering the box 21, a rotating drum 23 vertically arranged and rotatably connected in the inner cavity of the box 21, a centrifugal motor (not shown in the figure) for driving the rotating drum 23 to rotate, a spiral scraper 24 arranged in the rotating drum 23, and an operating mechanism 25 for driving the spiral scraper 24 to cling to or be away from the inner side wall of the rotating drum 23, wherein the specific transmission connection structure between the centrifugal motor and the rotating drum 23 is the same as that of a conventional centrifuge, the side wall of the rotating drum 23 is provided with a plurality of through holes, the width or diameter of the through holes cannot be too large, so that water can be thrown out of the rotating drum 23 under the action of centrifugal force, and ice crystals are filtered on the inner side wall of the rotating drum 23; the operating mechanism 25 may be a conventional mechanism such as an electric telescopic rod fixedly connected to the spiral scraper 24. The cover body 22 is provided with a centrifugal liquid inlet hole 26 communicated with the inner cavity of the box body 21, and the centrifugal liquid inlet hole 26 is connected with the ice making liquid outlet joint 18 of the ice making machine 10 through a conduit; the bolt direction of the spiral scraper 24 is the same as the rotation direction of the rotary drum 23, and the projected chord length of the spiral scraper 24 on the horizontal plane should match with the radius of the rotary drum so as to be tightly attached, the upper end of the spiral scraper 24 is fixedly connected or integrally connected with a discharge rod 28 positioned at the upper end of the rotary drum 23, and the cross sections of the discharge rod 28 and the spiral scraper 24 are both in a V shape or a U shape, i.e. the upper sides thereof are all formed with a V-shaped groove or a U-shaped groove, and the V-shaped grooves or the U-shaped grooves are mutually communicated, the upper part of the box body 21 is provided with a centrifugal discharge hole 29 connected with the discharge rod 28, the lower part of the box body 21 is provided with a drain hole 62 communicated with the inner cavity of the box body 21, so that the spiral scraper 24 is far away from the side wall of the rotary drum 23 when the spiral scraper 24 is tightly attached to the inner side wall of the rotary drum 23, the ice crystals adhered to the inner side wall can be hung down by the spiral scraper 24 and fall into the V-shaped groove or the U-shaped groove along with the rotation of the rotary drum 23, meanwhile, the seawater flows upwards to the discharge rod 28 under the action of rotational flow formed by rotation of the rotary drum 23 and is finally discharged from the centrifugal discharge hole 29, and the residual low-temperature high-salt seawater is discharged through the discharge hole 62, so that the seawater desalination is realized.
The ice and water can be effectively separated by introducing the fluid ice into the centrifuge 20, and the acceleration provided by the centrifugal force can accelerate the separation of salt packets in ice crystals, so that the effect of rapid desalination is realized, and the seawater with the salinity of 3 percent can be desalinated to the salinity of below 0.1 percent by rotating for 2 minutes under the condition of 5000 r/min.
Considering that the salinity of the seawater is different between rainy season and dry season and the working condition of ice making is changed, preferably, in this embodiment, the salinity meter 27 is connected to the centrifugal discharge hole 29, and the salinity meter 27 is directly or indirectly connected to the centrifugal motor through the controller 63 in a communication manner, so that when the salinity meter 27 detects that the salinity is higher than the preset maximum threshold, the controller 63 increases the centrifugal time or increases the centrifugal speed, and conversely, when the salinity meter 27 detects that the salinity is lower than the preset minimum threshold, the centrifugal time is decreased or the centrifugal speed is decreased, so as to realize the real-time control of the working condition of the centrifuge 20 and effectively reduce the energy consumption. In addition, a melter 64 may be provided between the salinity meter 27 and the centrifugal discharge port 29 to fuse the ice crystals, if necessary, to avoid ice crystals from entering the salinity meter 27 directly to affect the metering accuracy.
The structure of the pre-cooling heat exchanger 30 is the same as that of a conventional heat exchanger, and the pre-cooling heat exchanger 30 can be directly purchased from the market, and the pre-cooling heat exchanger 30 is provided with a cold medium inlet, a heat medium outlet, a water inlet hole and a water outlet hole which are mutually communicated, the cold medium inlet of the pre-cooling heat exchanger 30 is communicated with the water outlet hole 62, and the water outlet of the pre-cooling heat exchanger 30 is connected with an ice-making liquid inlet joint 61 of the ice maker 10. In this way, when seawater enters the ice maker 10 through the precooling heat exchanger 30, it can be precooled, so as to improve the working efficiency of the ice maker 10, and the cold energy in the water discharged from the centrifuge 20 is fully utilized, and the water flowing out from the heat medium outlet is directly discharged or collected so as to further extract salt.
The ice storage box 40 is a conventional heat preservation box body, the upper end of the ice storage box 40 is provided with an ice storage liquid inlet hole 41 communicated with the centrifugal discharge hole 29, and the lower part of the side wall of the ice storage box 40 is provided with a chilled water outlet 42 so as to provide cold water for equipment needing to use cold water. Preferably, the chilled water outlet 42 is connected to a conventional water using device 50, a return pipe is provided on the water using device 50, and a shower pipe 43 connected to the return pipe is provided at an upper portion of the inner cavity of the ice bank 40. Since the density of ice crystals is less than that of water, ice crystals can be suspended in the upper portion of the inner cavity of the ice storage case 40 after entering the ice storage case 40; when cold energy is needed, the temperature of the returned water is high, the water is sprayed from the upper part and fully contacted with ice crystals to absorb the cold energy, and finally the cold energy is discharged out of the refrigerator 40 in the form of chilled water, so that a heat exchanger is not needed, the refrigerator is economical and reliable, and the heat exchange efficiency is high due to the large contact surface. After the chilled water provides cooling energy to the outside, whether backflow is required may be determined according to the water level in the storage compartment 40.
The seawater desalination and ice storage coupling system provided by the embodiment decouples the condensation and melting processes of seawater desalination water by a freezing method, and takes the desalted ice as a cold storage medium, so that the refrigerating unit can be used for desalting and storing cold at the same time, the utilization rate of each component of the system can be effectively improved, and the production benefit can be improved; the system can be used by combining renewable energy power generation, and can also be used in the scenes of islands, ships, energy micro-grids and the like.
The present invention is described in detail with reference to the attached drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention based on the prior art, which fall within the scope of the present invention.
Claims (6)
1. A seawater desalination and ice storage coupling system is characterized by comprising an ice maker and a centrifugal machine which are sequentially connected, wherein the centrifugal machine comprises a box body, a cover body, a rotary drum, a centrifugal motor, a spiral scraper and an operating mechanism, the box body is covered on the box body, the rotary drum is vertically arranged and rotatably connected into an inner cavity of the box body, the centrifugal motor is used for driving the rotary drum to rotate, the spiral scraper is arranged in the rotary drum, the operating mechanism is used for driving the spiral scraper to be tightly attached to or far away from the inner side wall of the rotary drum, a centrifugal liquid inlet hole is formed in the cover body and communicated with the inner cavity of the box body, the centrifugal liquid inlet hole is connected with the ice maker, a plurality of through holes are formed in the side wall of the rotary drum, the upper end of the spiral scraper is fixedly or integrally connected with a discharge rod positioned at the upper end of the rotary drum, and the cross sections of the discharge rod and the spiral scraper are both in a V shape or a U shape, the upper part of the box body is provided with a centrifugal discharge hole connected with the discharge rod, and the lower part of the box body is provided with a drain hole communicated with the inner cavity of the box body.
2. The seawater desalination and ice storage coupling system of claim 1, wherein the ice maker comprises an outer cylinder, an inner cylinder disposed in the outer cylinder, a stirring rod inserted in the inner cylinder and disposed coaxially with the inner cylinder, a stirring motor for driving the stirring rod to rotate, and a scraper fixedly connected to the stirring rod for scraping ice crystals adhered to the inner wall of the inner cylinder, wherein a sealed refrigerant channel is disposed between the outer cylinder and the inner cylinder, a refrigerant input joint communicated with the refrigerant channel and an ice making liquid outlet joint communicated with the inner cylinder are disposed at an upper portion of the outer cylinder, and a refrigerant output joint communicated with the refrigerant channel and an ice making liquid inlet joint communicated with the inner cylinder are disposed at a lower portion of the outer cylinder.
3. The seawater desalination and ice storage coupling system of claim 1, wherein the centrifugal discharge hole is connected with a salinity meter, and the salinity meter is in direct or indirect communication connection with the centrifugal motor.
4. The seawater desalination and ice storage coupling system of any one of claims 1-3, further comprising a pre-cooling heat exchanger, wherein a cold medium inlet of the pre-cooling heat exchanger is communicated with the drain hole, and a water outlet of the pre-cooling heat exchanger is connected with the ice maker.
5. The seawater desalination and ice storage coupling system as claimed in any one of claims 1 to 3, further comprising a refrigerator, wherein the upper end of the refrigerator is provided with an ice storage inlet hole communicated with the centrifugal discharge hole, and the lower part of the side wall of the refrigerator is provided with a chilled water outlet.
6. The coupled system for seawater desalination and ice storage as claimed in claim 5, wherein the chilled water outlet is connected to a water using device, the water using device is provided with a return pipe, and the upper part of the inner cavity of the ice storage box is provided with a spray pipe connected with the return pipe.
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