CN110818166A - Device for continuously desalting seawater by freezing seawater - Google Patents

Abstract

The device for continuously freezing seawater for desalination according to the present invention includes an ice making part, an evaporation part, a Stirling refrigerator, a fresh water tank and a control part. The cold end pipeline leads to the ice making chamber, and the hot end pipeline leads to the To the evaporation part, the first ice-melting chamber, the second ice-melting chamber; the ice-making chamber includes a first ice plate and a refrigeration part, the refrigeration part is arranged on one side of the first ice plate and communicated with the cold end pipeline, and the ice-making drive The mechanism is used to drive the first ice plate to move horizontally. The first ice melting chamber includes a second ice plate and a first heat sink. The first heat sink is arranged on one side of the second ice plate and communicated with the hot end pipeline. The ice melting drive mechanism is used to drive the second ice plate to move horizontally, and the control unit controls the first ice melting drive mechanism, the ice making drive mechanism and the second ice melting drive mechanism to drive the second ice plate and the second ice making The first ice plate in the ice chamber moves horizontally toward the ice making chamber and the second ice melting chamber, and the ice making chamber and the second ice melting chamber simultaneously perform ice making and melting.

Description

A device for continuously freezing seawater for desalination

technical field

The invention belongs to the field of refrigeration, and in particular relates to a device for continuously freezing seawater for desalination of seawater.

Background technique

Water has always been a resource for human survival. With the increasing number of human beings on the earth and the increasingly serious environmental pollution caused by the continuous development of industry, freshwater resources have become increasingly scarce. Solving the freshwater problem has risen to a national strategic level. Especially in the Middle East, freshwater resources are more scarce, and the Middle East has relatively abundant solar energy and seawater. Combining the two can solve the problem of freshwater resources well on the one hand, and reduce fuel consumption on the other hand. use, thereby reducing environmental pollution.

Nowadays, there are two main methods used in seawater desalination. One is to heat seawater to generate water vapor and then to obtain fresh water from the water vapor. The heat is provided by solar focusing, vapor compression and heat pump methods.

The other is to freeze seawater to make ice, and then melt the ice to obtain fresh water. According to the knowledge of solution thermodynamics, when the seawater is crystallized by the freezing method, the impurities in the seawater can be automatically excluded, and the purity of the ice crystals can be kept. Finally, clean fresh water can be obtained by washing and melting the ice crystals. of scaling.

At present, there are not many devices for freezing seawater to make ice, and the technology of seawater desalination using Stirling refrigerators is not mature.

SUMMARY OF THE INVENTION

The present invention aims to invent a continuous seawater ice-making and seawater desalination device based on a Stirling refrigerator driven by solar energy, which is used to solve the problem of freshwater resources in the region.

The invention provides a continuous seawater ice-making and seawater desalination device by using the cold end of the Stirling refrigerator to provide the cold source and the hot end to provide the heat source.

The invention provides a device for desalinating seawater continuously for freezing seawater, which has the characteristics of comprising an ice-making part, which has a first ice-melting chamber, an ice-making chamber, and a second ice-melting chamber which are arranged adjacent to each other in the horizontal order; A Stirling refrigerator with a cold head and a hot end heat exchanger, the cold end pipeline that exchanges heat with the cold head leads to the ice-making chamber, and the hot end pipeline that exchanges heat with the hot end heat exchanger leads to the ice-making chamber respectively. an evaporation part, a first ice-melting chamber, and a second ice-melting chamber; a fresh water pool for collecting fresh water generated in the first ice-melting chamber, the second ice-melting chamber and the evaporation part through pipes; and a control part, comprising a plurality of Control valves and pumps in the cold-end pipeline and the hot-end pipeline, wherein the ice-making chamber includes an ice-making pool, a first ice plate, a refrigeration element, and an ice-making driving mechanism, and the first ice plate is horizontally arranged in the ice-making pool , the refrigeration element is arranged on one side of the first ice plate and communicated with the cold end pipeline, the ice-making driving mechanism is used to drive the first ice plate to move horizontally, and the first ice melting chamber includes a first ice melting pool and a second ice plate. , the first heat sink, the first ice melting drive mechanism, the second ice plate is horizontally arranged in the first ice melting pool, the first heat sink is arranged on one side of the second ice plate and communicated with the hot end pipeline, the first The ice-melting drive mechanism is used to drive the second ice plate to move horizontally. The second ice-melting chamber includes a second ice-melting pool, a second heat sink, and a second ice-melting drive mechanism. The second heat sink is communicated with the hot end pipeline and is connected to the The height of the first heat sink is the same, the second ice-melting drive mechanism is used to drive the first ice plate to move horizontally, the control part controls the opening and closing of the control valve and the pump respectively, and the ice-making chamber and the first ice-melting chamber simultaneously make ice and melt. After freezing, the control unit controls the first ice-melting drive mechanism, the ice-making drive mechanism, and the second ice-melting drive mechanism to drive the second ice plate in the first ice-melting chamber and the first ice plate in the ice-making chamber to make ice, respectively. The chamber and the second ice-melting chamber move horizontally, and the ice-making chamber and the second ice-melting chamber perform ice-making and ice-melting simultaneously.

In the device for desalinating seawater continuously by freezing seawater provided by the present invention, it may also have the following feature: wherein, the first ice melting chamber and the second ice melting chamber each have two lifting members, and the two lifting members are respectively arranged on The two ends of the lower part of the first ice plate or the second ice plate are respectively used to lift one end of the first ice plate or the second ice plate.

In addition, the device for continuously freezing seawater for desalination of seawater provided by the present invention may also have the following characteristics: wherein, the two end walls of the ice-making pool are respectively provided with transport ports corresponding to the first ice plates horizontally, A water blocking shaft is arranged in the transport port, and a through hole corresponding to the first ice plate is arranged in the water blocking shaft.

In addition, in the device for continuously freezing seawater for desalination of seawater provided by the present invention, it may also have the following characteristics: wherein, the first heat sink is a plurality of U-shaped tubes connected in series, and the heated seawater is used as the heat source in the U-shaped tube. .

In addition, the device for continuously freezing seawater for desalination of seawater provided by the present invention may also have the following characteristics: wherein the refrigeration element includes a plurality of U-shaped tubes arranged in parallel, and the refrigeration element uses ethylene glycol as the refrigerant.

In addition, the device for continuously freezing seawater for desalination of seawater provided by the present invention may also have the feature that the solar cell panel provides the electrical energy required for the operation of the Stirling refrigerator.

In addition, in the device for continuously freezing seawater for desalination of seawater provided by the present invention, it may also have the following characteristics: wherein, the hot-end pipeline whose one end communicates with the ocean is sequentially connected with the hot-end heat exchanger, the evaporation part, the first return line The heat exchanger communicates with the ocean after exchanging heat.

In addition, in the device for desalinating seawater continuously by freezing seawater provided by the present invention, it can also have such a feature: wherein, a small groove with an oblique angle is provided on one side of the ice-making plate, which is used to keep the circulating seawater in the seawater. Ice is made on the plate, and there are several small grooves on the other side.

In addition, the device for continuously freezing seawater for desalination of seawater provided by the present invention may also have the following characteristics: wherein, the evaporation part includes an evaporation chamber, a water collection tank, and a spray pipe, and an endothermic material is provided on the surface of the evaporation chamber to collect heat. The water tank and the spray pipe are respectively arranged in the evaporation chamber. The spray pipe is arranged at the lower part of the water collecting tank and is located at the upper part of the hot end pipeline. The pipe sprays the hot end pipeline in the evaporation chamber, and the water collecting tank collects the condensed water generated in the evaporation chamber, and transports the condensed water to the fresh water tank through the pipeline.

In addition, the device for continuously freezing seawater for desalination of seawater provided by the present invention may also have the following feature: wherein the first ice-melting chamber or the second ice-melting chamber uses pipes from a freshwater pool before the ice melting starts. The first ice plate or the second ice plate is washed with fresh water, and the waste water is discharged to the ocean through the pipeline after the washing is completed.

The role and effect of the invention

According to the device for continuously freezing seawater for desalination of seawater involved in the present invention, because the Stirling refrigerator is used for refrigeration, the refrigerant of the Stirling refrigerator has no phase change and no pollution, and is not limited by the conditions of medium and low temperature refrigerants. The temperature of the hot end of the Stirling refrigerator can reach 70 °C; the energy utilization rate is high, and the cold and heat of the Stirling refrigerator are fully used.

In addition, ice making and distillation are carried out at the same time; the continuity of ice making is good, and there is no need to stop the machine for manual ice extraction.

Further, the present invention adopts the ice making plate to make ice, which can be easily replaced after the plate is corroded.

Description of drawings

1 is a schematic diagram of a device structure in an embodiment of the present invention;

2 is a schematic diagram of the arrangement of the ice-making chamber and the ice-melting chamber in the embodiment of the present invention;

3 is a schematic diagram of an ice-making chamber in an embodiment of the present invention;

4 is a schematic diagram of an ice melting chamber in an embodiment of the present invention;

5 is a schematic diagram of an ice making plate in an embodiment of the present invention;

6 is a schematic diagram of a water blocking shaft in an embodiment of the present invention;

7 is a schematic diagram of a transmission shaft in an embodiment of the present invention;

FIG. 8 is a schematic diagram of a washing water pipe in an embodiment of the present invention.

Detailed ways

In order to make it easy to understand the technical means, creative features, goals and effects achieved by the present invention, the following embodiments describe the device for continuously freezing seawater for desalination of seawater in accordance with the present invention in conjunction with the accompanying drawings.

Example

The device for continuously freezing seawater for desalination of seawater according to the present invention is a continuous seawater ice-making and seawater desalination device based on a Stirling refrigerator.

As shown in FIG. 1 , the device for continuously freezing seawater for desalination includes an ice melting chamber 12 , an ice melting chamber 38 , an ice making chamber 39 , a fresh water tank 15 , an evaporation chamber 18 , and a Stirling refrigerator 32 .

As shown in FIG. 2 , the ice-melting chamber 12 , the ice-making chamber 39 , and the ice-melting chamber 38 are arranged adjacent to each other horizontally in sequence.

As shown in FIG. 3 , FIG. 4 , and FIG. 5 , the ice making chamber 39 includes an ice making plate 40 arranged horizontally.

The freezing pipeline 603 is arranged on the outside of the ice making plate 40, and three transmission shafts 605 are arranged side by side with the freezing pipeline 603. As shown in FIG. The side of the plate 40 in contact with the transmission shaft 605 is provided with a plurality of concave small grooves matched with the convex small blocks, and the concave small grooves are engaged with the convex small blocks on the transmission shaft 605, and the transmission shaft 605 is driven by a motor. And drive the ice-making plate 40 to move, and the small grooves and small blocks that are engaged with each other can reduce the friction between the transmission shaft and the plate.

The other side of the ice-making plate 40 is provided with a plurality of small grooves 401 with beveled angles. The small grooves 401 with beveled angles can increase the contact area with the seawater while keeping the circulating seawater on the plate to make ice.

As shown in Figure 5, the ice making plate 40 and the ice melting plate 36 have small grooves with beveled angles on one side. The small grooves with beveled angles can increase the contact area with seawater and keep the circulating seawater on the plates. ice making. The other side is also provided with a plurality of small grooves, which can be wedged with the small raised blocks on the transmission shaft 605, which can improve the transmission quality and reduce the friction loss.

As shown in FIG. 7 , the two sides of the transmission shafts 605 and 705 are provided with small protruding pieces, and the small protruding pieces can be engaged with the small grooves on the ice making plate and the ice melting plate.

The transmission shaft 605 and the transmission shaft 705 are driven by the motor and drive the ice making plate 40 and the ice melting plate 36 for transmission. The small grooves and small bumps that are engaged with each other can reduce the friction between the transmission shaft and the plates.

The freezing pipeline 603 in contact with one side of the ice making plate 40 is U-shaped, which can make the temperature of the ice making plate 40 more uniform. A freezing pipeline support frame 604 with thermal insulation material is arranged below the freezing pipeline 603 to avoid the freezing pipeline 603 While the cooling capacity is lost, it can also support the refrigerating pipeline 603. The refrigerating pipeline 603 is filled with ethylene glycol as a refrigerant, and the refrigerating pipeline 603 is connected in parallel with the ethylene glycol circulation pipeline 5, and the ethylene glycol circulation pipeline 5 Exchanging heat with the cold end of the Stirling refrigerator 32 , the ethylene glycol circulates in the refrigeration line 603 and the ethylene glycol circulation line 5 through the power provided by the pump 6 .

The structure of the ice melting chamber 12 is the same as that of the installation and the melting ice chamber 38 .

The ice-melting chamber 38 includes a horizontally disposed ice-melting plate 36 , and a washing water pipeline 709 as shown in FIG. 8 is arranged in the middle of the ice-melting chamber 38 . The washing water pipes 709 in the ice-melting chamber 12 and the ice-melting chamber 38 are respectively communicated with the fresh water tank 15 through a water pipe 81, and the water pipe 81 is respectively provided with a valve 13 and a valve 14.

As shown in FIG. 8, the washing water pipe 709 is provided with a spray washing water port 710, and the washing water is sprayed on the lower ice melting plate 36 or the ice melting plate 11 in a spray form through the spray washing water port 710 on the washing water pipe 709, and the washing water is washed. Sea water on ice surface.

The ice-melting plate 36 and the ice-making plate 40 have the same structure, but the ice-melting plate 36 only has a transmission shaft 705 in the middle on the transmission side, and a lifting device 706, a support shaft 703, a washing water drain bracket 702 and a drain on both sides. The fresh water support 707 is provided with a washing water drain 701 below the washing water drain support 702 , and a fresh water drain 708 is provided below the fresh water drain support 707 , and the fresh water drain 708 is connected to the fresh water tank 15 .

The ice melting plate 36 is also distributed with a plurality of sets of U-shaped hot water pipes 704 on the transmission side, which can make the temperature of the ice melting plate 36 more uniform. The hot water pipes 704 of the ice melting chamber 12 are connected in series and communicate with the hot end pipe 90 , the hot water pipeline 704 of the ice melting chamber 38 is connected in series and communicated with the hot end pipeline 90. The hot end pipeline 90 is provided with a valve 8 and a valve 34 respectively. heat exchange at the ends.

As shown in FIGS. 1 and 3 , the ice making chamber 39 has a pipe that communicates with the seawater 1 . When making ice, the seawater in the ice-making chamber 39 is powered by the pump 3 in the pipeline, passes through the valve 43 and the circulating pump 46, and enters the seawater inlet 607 on the side of the ice-making chamber 39. At this time, the valve 42 is closed and the valve 44 is opened. At the same time, the water retaining shafts 602 shown in FIG. 6 on the water retaining plates on both sides rotate to close the transportation port 601, and the water retaining shaft 602 is provided with a through port 6021 corresponding to the ice making plate 40 to avoid the leakage of seawater and let the seawater Flowing over the ice making plate 40 at a speed of 0.1m/s, a part of the seawater will be left in the small groove with a bevel and freeze on the plate, and the other part of the seawater will enter the seawater through the valve 44 and enter the liquid storage tank 45 , the circulating pump 46 provides power to circulate the seawater in the ice-making chamber 39 and the liquid storage tank 45. When the seawater concentration is too high, open the valve 42 and close the valve 44, so that the seawater first enters the heat exchanger 4 through the valve 42. The incoming hot seawater is preheated before being discharged to the ocean 1.

After the ice making is completed, the seawater is firstly discharged through the seawater discharge port 606, and then the water blocking shaft 602 is rotated, so that the through groove on the water blocking shaft 602 is communicated with the transport port 601, and the ice-making is connected to the ice making through the raised blocks on the transmission shaft 605. The small concave grooves on one side of the plate 40 are wedged together, and the ice-making plate 40 is slowly driven by the transmission shaft 605, and firstly leaves the ice-making chamber 39 through the transport port 601 on the water blocking plate on one side and the through groove on the water blocking shaft 602. , and then enter the ice-melting chamber 12 on one side to melt the ice.

At this time, the ice-melting plate 36 of the other side of the ice-melting chamber 38 will be slowly driven by the transmission shaft 705 , first leave the ice-melting chamber 38 , and then pass through the transport port 601 on the water blocking plate on the other side of the ice-making chamber 39 and The through groove on the water blocking shaft 602 enters the ice making chamber 39 for ice making. At this time, the original ice making plate 40 is switched to the ice melting plate 11, the original ice melting plate 36 is switched to the ice making plate 40, and the ice is melted. There is no ice-melting plate in the chamber 38 until the next ice-making is over, the ice-making plate 40 is driven back to the ice-melting chamber 38 again to melt the ice, and the ice-melting plate 11 is driven back to the ice-making chamber 39 to make ice. At this time, the ice-melting chamber 12 No ice melting plate, so back and forth.

When melting ice, a small amount of fresh water is used to wash the ice cubes, that is, the essence of the washing water is a small amount of fresh water. Seawater, after the seawater is cleaned, the lifting device 706 away from the washing water discharge port 701 will rise, and under the support of the washing water discharge support 702, the ice melting plate 36 will be inclined toward the washing water discharge port 701, and the washed washing water and seawater will be removed. It is discharged into the washing water outlet 701 together, and then the valve 9 or the valve 35 is opened to discharge the waste water.

After the ice melting is completed, the lifting device 706 away from the fresh water outlet 708 will be raised, and under the support of the fresh water outlet bracket 707, the ice melting plate 36 will be inclined towards the fresh water outlet 708 to discharge the melted fresh water into the drainage outlet 708. The fresh water port 708 is used for fresh water collection, and the collected fresh water is supplied into the fresh water tank 15 by the pump 10 and the pump 37 to provide power respectively for storage.

When the ice needs to be melted, the corresponding valve will be opened according to the ice-melting chamber that needs to work. For example, when the ice-melting plate 11 is melting ice in the ice-melting chamber 12, the valve 8 will be opened for the hot water pipeline 704 in the ice-melting chamber 12. Provide hot water, close the valve 34 and valve 23 at the same time, and when the ice melting plate 36 is melting ice in the ice melting chamber 38, open the valve 34 to provide hot water to the hot water pipe 704 in the ice melting chamber 38, and close the valve at the same time 8 and 23, after the hot sea water provides heat for the ice making plate 11 or the ice making plate 36, it is discharged from the hot water pipeline 704 to the ocean 1 through the pipeline 7 and the pipeline 2 respectively.

Due to the large amount of seawater during ice making and there is no seawater during ice melting, the ice melting speed will be faster than the ice making speed. Therefore, when the ice melting is not required, the valve 23 is opened, and the hot end of the Stirling refrigerator 32 is connected to the steam tray. Pipe 22 is in communication while valve 8 and valve 34 are closed.

The outer layer of the evaporation chamber 18 is covered with black heat-absorbing material, an S-shaped evaporation coil 22 is arranged below, a seawater spray pipe 19 is arranged in the middle, a condenser 17 is arranged above, and a fresh water collection pipe 16 is arranged below the condenser 17, The fresh water collection pipe 16 is connected to the fresh water tank 15, and the bottom of the evaporation chamber 18 is also provided with a drain valve 21. When the evaporation chamber is running, the valves 25 and 26 are opened, the seawater is powered by the pump 28, and the seawater exchanges heat with the seawater in the evaporation coil 22 in the regenerator 20 before entering the evaporation chamber 18, so that the waste heat can be used more fully , the seawater is sprayed to the evaporation coil 22 through the small holes on the seawater spray pipe 19. Under the irradiation of sunlight and the heating of the evaporation pipe 22, the seawater evaporates into water vapor, and the water vapor condenses into fresh water in the condenser 17. , collected into the fresh water tank 15 through the fresh water collection pipe 16 , and the excess sea water is discharged through the drain valve 21 below the evaporation chamber 18 .

One end of the hot end pipeline 82 for exchanging heat with the hot end of the Stirling refrigerator 32 is connected to the seawater 1, and the seawater 1 is powered by the pump 31 to enter the hot end of the Stirling refrigerator for heat exchange, and the other end is connected to the pump 33 and the valve in turn. 23. The evaporation coil 22 and the heat exchanger 20 in the evaporation chamber 18 are connected to the seawater 1 behind.

The Stirling refrigerator 32 uses the solar panel 24 for power supply. The solar panel 24 is connected to the battery 27 to make the battery 27 store electricity. Before flowing to the Stirling refrigerator 32, the direct current will be converted into an alternating current signal of 220V50Hz through the inverter 29. 30.

The device based on the continuous freezing of seawater for desalination of seawater based on Stirling refrigerator can continuously make ice and desalinize seawater, without the need to stop artificial ice making, and make full use of the remaining energy, and in the Middle East all year round There is abundant solar energy, which further improves the utilization rate of energy.

In the device of the present invention for continuously freezing seawater for seawater desalination, the seawater 1 enters from the seawater transportation pipeline and exchanges heat with the seawater in the discharge pipeline in the heat exchanger for precooling. During ice making, the seawater 1 is supplied by a pump Power, enter the seawater inlet on one side of the ice-making chamber, and close the valve on the seawater discharge side. At the same time, the water retaining shafts on the baffles on both sides rotate to close the transportation port to avoid seawater leakage. When the seawater is filled with ice making When the chamber is closed, the valve on the inlet side is closed, and the seawater is completely closed to make ice in the ice-making chamber. The ice-making plate is provided with cooling capacity by the freezing pipe. The ethylene glycol in the freezing pipe circulates in the cold end of the Stirling refrigerator and the ice-making chamber. After 30 minutes of freezing, the valve on the discharge side is opened to drain the seawater. , then turn the water blocking shaft to open the transport port, the ice-making plate is washed and melted in the ice-melting chamber on one side that is driven by the transmission pipeline, and the ice-melting plate in the ice-melting chamber on the other side is driven to the ice-melting chamber through the transmission pipeline. Continue to make ice in the ice-making chamber, the ice-melting plate becomes the ice-making plate, and the ice-making plate that enters the ice-melting chamber becomes the ice-melting plate. After the ice-melting plate enters the ice-melting chamber, the washing water passes through the washing water. The spray and washing water port on the lower side of the pipeline sprays the ice melting plate. After 5 seconds of spraying, the lifting device on the side away from the washing water outlet will rise. It will be inclined to a certain angle to the washing water outlet, and the washing water and seawater will be discharged into the washing water outlet together, and then the hot water pipe will be connected to the hot end of the Stirling refrigerator, and the seawater will pass through the hot end of the Stirling refrigerator. After the heat is absorbed, the ice melting plate is provided with heat, thereby melting the ice crystals, and the seawater after the absorbed heat will be discharged on the other side. After heating for 10 minutes, the lifting device away from the fresh water outlet will rise, and the ice melting plate will be inclined to a certain angle to the fresh water outlet under the support of the fresh water drainage bracket, and the fresh water will be discharged into the fresh water outlet for collection. The valve between the hot water pipe and the hot end of the Stirling refrigerator is closed, and the hot end of the Stirling refrigerator is connected to the evaporating coil in the evaporating chamber to provide heat to the evaporating chamber. At the same time, the seawater enters the evaporation chamber from the seawater spray pipe for distillation. Before the seawater enters the evaporation chamber, the seawater will exchange heat with the seawater discharged from the evaporation coil for preheating. The seawater passes through the small holes in the seawater spray pipe to the evaporation pan. The pipe is sprayed and evaporated into water vapor, the water vapor is condensed into fresh water in the condenser, the fresh water flows into the fresh water tank through the fresh water collection pipe under the condenser for collection, and the excess sea water is discharged through the discharge valve under the evaporation chamber.

The above embodiments are preferred cases of the present invention, and are not intended to limit the protection scope of the present invention.

Action and effect of the embodiment

According to the device for continuously freezing seawater for desalination of seawater involved in this embodiment, because the Stirling refrigerator is used for refrigeration, the refrigerant of the Stirling refrigerator has no phase change and no pollution, and is not limited by the conditions of medium and low temperature refrigerants , the temperature of the hot end of the Stirling refrigerator can reach 70 °C; the energy utilization rate is high, and the cold and heat of the Stirling refrigerator are fully used.

In addition, ice making and distillation are carried out at the same time; the continuity of ice making is good, and there is no need to stop the machine for manual ice extraction.

Further, the present invention adopts the ice making plate to make ice, which can be easily replaced after the plate is corroded.

Further, ethylene glycol is used in the refrigeration pipeline of the embodiment, and scale will not be generated in the pipeline.

Further, the embodiment adopts the solar cell panel to drive the Stirling refrigerator, which can well solve the limitation of the lack of power grid in the Middle East.

The above embodiments are preferred cases of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (10)

1. An apparatus for continuously desalinating seawater by freezing seawater, comprising:

the ice making part is provided with a first ice melting chamber, an ice making chamber and a second ice melting chamber which are sequentially arranged adjacently along the horizontal direction;

an evaporation section;

the Stirling refrigerator is provided with a cold head and a hot end heat exchanger, a cold end pipeline exchanging heat with the cold head is communicated with the ice making chamber, and a hot end pipeline exchanging heat with the hot end heat exchanger is respectively communicated with the evaporation part, the first ice melting chamber and the second ice melting chamber;

a fresh water tank for collecting fresh water generated in the first ice melting chamber, the second ice melting chamber and the evaporation part through pipelines; and

a control part including a plurality of control valves and pumps respectively disposed in the cold end pipeline and the hot end pipeline,

wherein the ice making chamber comprises an ice making pool, a first ice plate, a refrigerating piece and an ice making driving mechanism,

the first ice plate is horizontally arranged in the ice making pool, the refrigerating piece is arranged on one side of the first ice plate and communicated with the cold end pipeline, the ice making driving mechanism is used for driving the first ice plate to horizontally move,

the first ice melting chamber comprises a first ice melting pool, a second ice plate, a first heat dissipation piece and a first ice melting driving mechanism,

the second ice plate is horizontally arranged in the first ice melting tank, the first heat dissipation part is arranged at one side of the second ice plate and is communicated with the hot end pipeline, the first ice melting driving mechanism is used for driving the second ice plate to horizontally move,

the second ice melting chamber comprises a second ice melting pool, a second heat dissipation member and a second ice melting driving mechanism,

the second heat dissipation part is communicated with the hot end pipeline and has the same height as the first heat dissipation part, the second ice melting driving mechanism is used for driving the first ice plate to horizontally move,

the control part controls the control valve and the pump to be opened and closed respectively, after the ice making chamber and the first ice melting chamber make ice and melt ice simultaneously, the control part controls the first ice melting driving mechanism, the ice making driving mechanism and the second ice melting driving mechanism to drive the second ice plate in the first ice melting chamber and the first ice plate in the ice making chamber to horizontally move towards the ice making chamber and the second ice melting chamber respectively, and the ice making chamber and the second ice melting chamber make ice and melt ice simultaneously.

2. The apparatus for continuously desalinating seawater by freezing seawater according to claim 1, wherein:

wherein the first ice melting chamber and the second ice melting chamber are both provided with two lifting pieces,

the two lifting pieces are respectively arranged at two ends of the lower part of the first ice plate or the second ice plate and are respectively used for lifting one end of the first ice plate or one end of the second ice plate.

3. The apparatus for continuously desalinating seawater by freezing seawater according to claim 1, wherein:

wherein, the two end walls of the ice making pool are respectively horizontally provided with a conveying port corresponding to the first ice plate,

a water blocking shaft is arranged in the transportation port, and a through port corresponding to the first ice plate is arranged in the water blocking shaft.

4. The apparatus for continuously desalinating seawater by freezing seawater according to claim 1, wherein:

the first radiating pieces are connected in series and communicated with a plurality of U-shaped pipes, and heated seawater is adopted as a heat source in the U-shaped pipes.

5. The apparatus for continuously desalinating seawater by freezing seawater according to claim 1, wherein:

the refrigeration piece comprises a plurality of U-shaped tubes which are arranged in parallel, and ethylene glycol is used as a secondary refrigerant for the refrigeration piece.

6. The apparatus for continuously desalinating seawater by freezing seawater according to claim 1, wherein:

wherein the solar cell panel provides electric energy required by the operation of the Stirling refrigerator.

7. The apparatus for continuously desalinating seawater by freezing seawater according to claim 1, wherein:

and the hot end pipeline with one end communicated with the ocean is communicated with the ocean after heat exchange with the hot end heat exchanger, the evaporation part and the first heat regenerator in sequence.

8. The apparatus for continuously desalinating seawater by freezing seawater according to claim 1, wherein:

wherein, the both sides of system ice board are provided with a plurality of recesses respectively.

9. An apparatus for continuously desalinating seawater by freezing seawater according to claim 7, wherein:

wherein the evaporation part comprises an evaporation chamber, a water collecting tank and a spray pipe,

the outer surface of the evaporation chamber is provided with a heat absorbing material, the water collecting tank and the spray pipe are respectively arranged in the evaporation chamber,

the spray pipe is arranged at the lower part of the water collecting tank and is positioned at the upper part of the hot end pipeline, the spray pipe is sequentially communicated with the first heat regenerator, the spray pump and the sea through pipelines,

the spray pipe sprays the hot end pipeline in the evaporation chamber,

the water collecting tank collects condensed water generated in the evaporation chamber and conveys the condensed water to the fresh water tank through a pipeline.

10. The apparatus for continuously desalinating seawater by freezing seawater according to claim 1, wherein:

and before the ice melting of the first ice melting chamber or the second ice melting chamber starts, the first ice plate or the second ice plate is washed by using fresh water from the fresh water pool through a pipeline, and after the washing is finished, the waste water is discharged to the ocean through the pipeline.

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