WO2017166152A1

WO2017166152A1 - Method and system for producing fresh water using difference between condensation points of seawater and fresh water

Info

Publication number: WO2017166152A1
Application number: PCT/CN2016/077966
Authority: WO
Inventors: 余家红
Original assignee: 红门智能科技股份有限公司
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2017-10-05

Abstract

Disclosed is a method for producing fresh water using the difference between the condensation points of seawater and fresh water, the method comprising: a. heating seawater to 45-65°C, using heat from the heat-exchange mechanism of a refrigeration device (50); b. performing a first-stage desalination of the heated seawater so as to form a low-salt mist; c. condensing, at a low temperature of 8-12°C, the low-salt mist formed by the first-stage desalination so as to form a condensate of fresh water molecules in the low-salt mist, and recovering salt crystal powder formed from the non-condensate, high-salt mist; d. performing second-stage desalination using a reverse osmosis membrane and active carbon so as to purify the fresh water produced to comply with drinking water standards. Also disclosed is a system for producing fresh water using the difference between condensation points of seawater and fresh water, the system comprising: a water pump (10), a seawater reservoir (20), a seawater heating container (30), an ultrasonic atomizer (40), a refrigeration device (50), a fan (60), and a second-stage desalination device (70).

Description

Method and system for preparing fresh water by using seawater and fresh water condensation temperature difference

[Technical Field]

The invention relates to seawater desalination, in particular to a method and a system for preparing fresh water by utilizing a temperature difference between seawater and fresh water condensation, which is suitable for energy conservation and consumables, has a large preparation amount of fresh water and low maintenance cost, and is suitable for wide application.

【Background technique】

As we all know, fresh water is an important resource for human life. China's fresh water resources are poor, not only with a small per capita possession, but also unevenly distributed in time and region. In recent years, with the rapid economic growth, coupled with the annual rainfall and the serious pollution of many water sources, the contradiction between supply and demand of fresh water has become increasingly prominent. Statistics show that there are more than 400 water shortages in 610 medium-sized cities and above in China, and 30 of the 32 large cities with a population of more than one million have long been plagued by water shortages. With the acceleration of urbanization, the high concentration of population and the rapid growth of the economy, the problem of water shortage has become a constraint to economic growth. The shortage and pollution of freshwater resources in recent years has also become an important obstacle to the sustainable development of the global economy.

On the other hand, since about 70% of the earth's surface is covered by the ocean, sea water resources are extremely abundant. To this end, various seawater desalination methods have been developed, including thermal distillation and reverse osmosis membranes. Among them, the traditional thermal distillation method is to form water vapor by heating sea water and then condense into distilled water. The method is simple and reliable, but the energy consumption is huge and the amount of fresh water is small, and the scale generated during the distillation process is difficult to clean. The high salinity water discharge has a large heat loss.

Most modern seawater desalination uses reverse osmosis membranes, which is on the raw water side of the semipermeable membrane. The external pressure higher than the osmotic pressure of the liquid is applied, and the process of allowing the water to permeate through the semipermeable membrane and allowing other materials to pass through and being trapped on the surface of the membrane. The reverse osmosis membrane material used in the method has a high price, and the permeable membrane is easily blocked when used in seawater having a salinity of 15 to 25, resulting in a large consumption of consumables, resulting in high cost.

[Summary of the Invention]

The invention aims to solve the above problems, and provides a seawater desalination process with low energy consumption, long service life of the consumables, large fresh water preparation, no secondary pollution to the marine environment, low maintenance cost, and suitable for large-scale application of seawater. A method of preparing fresh water from a temperature difference of fresh water condensation.

It is also an object of the present invention to provide a system for preparing fresh water using a temperature difference between seawater and fresh water condensation.

To achieve the above object, the present invention provides a method for preparing fresh water using a temperature difference between seawater and fresh water condensation, the method comprising the steps of:

a, heating the seawater to 45 ° C ~ 65 ° C by the heat exchange heat of the refrigeration device;

b. performing first-stage desalination treatment on the heated seawater, the first-stage desalination treatment is ultrasonic atomizing the heated seawater, so that the fresh water in the seawater is first atomized to form a low-salt mist;

c. The low-salinity mist formed by the first-stage desalination treatment is subjected to low-temperature condensation treatment at a temperature of 8 ° C to 12 ° C by a refrigerating device, so that fresh water molecules in the low salinity mist are lower than the dew point of the salt water seawater condensation The dew water flows into the fresh water storage container, and the salinity of the dew condensation fresh water is below 0.8, and the undewed high salinity mist forms a powdery salt crystal for recovery.

In the step a, the heat exchange heat energy of the refrigerating device is the heat energy released by the condenser of the refrigerating device.

In the step a, the seawater heating is to pump seawater into the seawater storage container, and then the seawater in the seawater storage container is introduced into the seawater heating container, and the heat energy released by the condenser of the refrigeration device heats the seawater to 45 °C~ 65 ° C degrees.

In the step b, the first stage desalination treatment is to introduce the seawater heated by the seawater heating container into the ultrasonic atomizer, and the ultrasonic wave generator ultrasonically atomizes the seawater. During the atomization process, the fresh water in the seawater is firstly Atomization into a low-salt mist, while the salinity of the un-atomized seawater is increased from 15-20% before the desalination treatment to 30-40%, and the high-salinity seawater after the atomization is discharged and is atomized to the ultrasonic Fresh sea water is added to the device.

In the step c, the low-temperature condensation treatment is to send the low-salt mist gas after the first-stage desalination treatment to the refrigeration evaporation chamber of the refrigeration device with a temperature of 8 ° C to 12 ° C through a blower, and the low salinity mist is met. The salt is precipitated coldly, and the fresh water molecules are condensed into dew water and flow into the fresh water storage container. The dew condensation salt water is dehydrated and then sucked into the evaporation chamber by a blower to form a powdery salt crystal and recovered by the salt crystal powder collection container.

In another aspect of the invention, the method comprises the steps of:

c. The low-salinity mist formed by the first-stage desalination treatment is subjected to low-temperature condensation treatment at a temperature of 8 ° C to 12 ° C by a refrigerating device, so that fresh water molecules in the low salinity mist are lower than the dew point of the salt water seawater condensation The dew water flows into the fresh water storage container, and the salinity of the dew condensation fresh water is below 0.8, and the undewed high salinity mist forms a powdery salt crystal for recovery;

d. The fresh water obtained is subjected to a second-stage desalination treatment through a reverse osmosis membrane and activated carbon. Purify fresh water to fresh water that meets drinking water standards with zero salinity.

In the step d, the obtained fresh water is pumped from the high pressure pump to the reverse osmosis device and the activated carbon water filter for the second-stage desalination treatment, and the fresh water is purified to a salinity of zero.

The present invention also provides a system for preparing fresh water using a temperature difference between seawater and fresh water condensation, the system comprising:

a water pump connected to the seawater inlet;

a seawater storage container connected to the water pump;

a seawater heating vessel connected to the seawater storage vessel;

An ultrasonic atomizer comprising a spray chamber, an ultrasonic ceramic sheet disposed at the bottom of the spray chamber, and a plurality of high pressure nozzles disposed on the upper portion of the ultrasonic ceramic sheet, the ultrasonic atomizer and the sea Water heating vessels are connected;

a refrigerating device comprising a refrigerating compressor, a condenser, an evaporator, and a cooling fan, wherein a condenser of the condenser passes through the seawater heating vessel and is connected to the refrigerating compressor, the evaporator and the refrigerating machine respectively a compressor, a condenser and an ultrasonic atomizer are connected, and the heat dissipation fan is arranged on a front side of the condenser;

a fan connected to the evaporator, and

The water pump transports the seawater to the seawater storage container, and then flows into the seawater heating container, and the heat energy released by the condenser of the refrigeration device heats the seawater, and the heated seawater enters the ultrasonic atomizer for ultrasonic atomization and then enters. The evaporator of the refrigeration unit is dew condensation at a low temperature to form fresh water.

In another aspect of the invention, the system comprises:

a water pump connected to the seawater inlet;

a seawater storage container connected to the water pump;

a seawater heating vessel connected to the seawater storage vessel;

An ultrasonic atomizer comprising a spray chamber, an ultrasonic ceramic piece disposed at the bottom of the spray chamber, and a plurality of high pressure nozzles disposed on the upper portion of the ultrasonic ceramic sheet, the ultrasonic atomizer being connected to the seawater heating container;

a fan connected to the evaporator;

Second stage desalination treatment device, including high pressure water pump, reverse osmosis device, activated carbon water filter And a drinking water storage tank, wherein the high pressure water pump is respectively connected to the evaporator and the reverse osmosis, and the activated carbon water filter is respectively connected to the reverse osmosis device and the drinking water storage tank, and

The water pump transports the seawater to the seawater storage container, and then flows into the seawater heating container, and the heat energy released by the condenser of the refrigeration device heats the seawater, and the heated seawater enters the ultrasonic atomizer for ultrasonic atomization and then enters. The evaporator of the refrigerating device performs low-temperature dew condensation to form fresh water, and the fresh water is treated by the second-stage desalination treatment device to form fresh water that meets the drinking water standard and flows into the drinking water storage tank for storage.

A seawater filter is connected between the water pump and the seawater inlet, and a water level controller is respectively disposed in the seawater storage container and the seawater heating container, and a refrigerant filter and a hair are disposed between the condenser and the evaporator. In the detail flow tube, a salt crystal powder collecting container is connected to the output end of the fan, and a first-stage desalination treatment water outlet and a drinking water storage tank are connected to the output end of the evaporator of the refrigerating device.

The contribution of the present invention is that it effectively solves the drawbacks of the conventional seawater desalination method. The method of the invention does not need to heat the seawater by energy energy such as electric energy consumption, and does not need to heat the seawater to a boiling state, but provides heat for heating the seawater by the heat energy generated during cooling, thereby achieving heating of the seawater and obtaining a good Cooling and condensation dissipate heat, resulting in energy savings of up to 75%.

On the other hand, the present invention atomizes seawater by ultrasonic atomization, which saves energy by 99% compared with conventional thermal atomization. The invention performs the second-stage desalination treatment when the seawater is diluted to a salinity of only 0.8 or less, so that the service life of the reverse osmosis membrane can be effectively extended by more than 10 times. The fresh water after the first-stage desalination treatment can be widely used in non-potable water fields such as agriculture and forestry irrigation, industrial water, boiler hydration, clean washing, etc., so that seawater desalination of zero consumables can be achieved.

In the process of seawater desalination, most of the salt is dehydrated to form powdery crystals during fresh water condensation, and is recycled into industrial salt, which has no pollution to the marine biological environment. It avoids the traditional reverse osmosis method, which will discharge a large amount of concentrated seawater during the desalination of seawater, resulting in high salinity of concentrated seawater and a great impact on the environment, such as the death of certain organisms when the salinity exceeds 40 。.

The invention has the characteristics of low energy consumption in the desalination process, long service life of the consumables, large preparation of fresh water, no secondary pollution to the marine environment, low maintenance cost, and the like, and is therefore suitable for large-scale popularization and application.

[Description of the Drawings]

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the overall structure of the system of the present invention

【detailed description】

The following examples are intended to further illustrate and explain the present invention and are not to be construed as limiting.

Example 1

The invention shows that the freezing point of seawater and fresh water is different, fresh water starts to freeze at 0 °C, and the salty seawater begins to freeze at -5 °C, so the condensation temperature of seawater and fresh water is different. When seawater and fresh water reach a certain temperature range, fresh water reaches the dew condensation temperature before the seawater.

The specific steps of the method for preparing fresh water using the temperature difference between seawater and fresh water condensation are as follows:

First, seawater heating

In the present invention, the seawater is heated by the heat exchange heat energy of the refrigeration device. Specifically, in the present embodiment, as shown in FIG. 1, the seawater is pumped into the seawater storage container 20 through the water pump 10 through the pipe 11 connecting the seawater inlet. Then, the seawater in the seawater storage container 20 is introduced into the seawater heating container 30, wherein the seawater storage container 20 is installed at a higher position than the seawater heating container 30, so that the seawater in the seawater storage container 20 can be automatically heated into the seawater by the drop. Container 30. A water level controller 21 is provided in the upper portion of the seawater storage container 20, which may be any well-known water level controller that is connected to the water pump 10 such that when the seawater entering the seawater storage container 20 reaches a set water level, the water pump 10 Stop pumping. When the water level is lower than the set water level, the water pump 10 starts pumping. In Fig. 1, a condenser 521 of a condenser 52 of the refrigerating apparatus passes through the seawater heating vessel 30, and is connected to the refrigerating compressor 51, so that heat energy released by heat dissipation of the condenser becomes a heat source, and seawater is passed through the heat source. Heating to 55 ° C, which avoids the drawbacks of traditional thermal distillation to heat seawater into water vapor and then condense into distilled water, which can significantly save energy.

Second, the first level of desalination

In this step, the heated seawater is subjected to a first-stage desalination treatment. The first-stage desalination treatment is ultrasonic atomization of the heated seawater, so that the fresh water in the seawater is first atomized to form a low-salt mist. Specifically, as shown in Fig. 1, the seawater heated by the seawater heating vessel 30 is introduced into the atomization chamber 41 of the ultrasonic atomizer, and the seawater is ultrasonically atomized by the ultrasonic ceramic sheet 42, and the high frequency of the ultrasonic ceramic sheet 42 The resonance breaks up the molecular bonds between the seawater molecules to produce a natural and elegant water mist. During the ultrasonic atomization process, the fresh water is preferentially atomized and floated to form a low salinity mist. The un-atomized seawater in the atomization chamber 41 has a higher salinity, and is increased from 15 to 20% of the salinity of ordinary seawater to a salinity of 30 to 40. After the atomization is completed, the high-salinity seawater can be discharged quantitatively and periodically, and the fresh seawater can be recirculated. The There is no need to add any chemical reagents in the step, which can save energy by 90% compared with the traditional thermal atomization method, and the seawater can kill 99.9% of the bacteria in the water under the action of ultrasonic waves in the atomization process, and the sterilization function is eliminated.

Third, fresh water low temperature condensation treatment

In this step, the low-salinity mist formed by the first-stage desalination treatment is subjected to a low-temperature dew condensation treatment by the refrigeration device 50. Specifically, as shown in FIG. 1, the low-salinity mist that has been ultrasonically atomized and sent out is sent to the evaporator 53 of the refrigerating apparatus via the blower 60, and when the salt-containing mist of 55 ° C enters the evaporation chamber at a temperature of 10 ° C. Since the fresh water molecules in the salt mist are faster at this temperature than the salt water molecules with higher salinity, the fresh water quickly forms dew, and the salinity of the dew condensation fresh water is below 0.8, and the dew condensation fresh water flows into the fresh water. A water storage container (not shown) is stored for use. The fresh water storage container is connected to a water outlet pipe 533 which is extended from the bottom of the evaporator 53. At the same time, the salt in the salt mist is precipitated by cold, and is taken out of the evaporation chamber by the blower 60 to form a powdery salt crystal which is recovered from the salt crystal powder collecting container 90, and the recovered powdery salt crystal can be used as an industrial salt. . The fresh water after the first-stage desalination treatment can be widely used in non-potable water fields such as agriculture and forestry irrigation, industrial water, boiler hydration, and clean washing.

Example 2

Steps 1 to 3 are the same as Embodiment 1, except that the second-level desalination process is added.

Fourth, the second level of desalination

This step is used to further purify the fresh water subjected to the first-stage desalination treatment to become fresh water that meets the drinking water standard with zero salinity.

In this step, the obtained fresh water is passed through the second-stage desalination treatment device 70. Secondary desalination treatment, purifying fresh water to fresh water with zero salinity and meeting drinking water standards. Specifically, as shown in Fig. 1, the obtained fresh water is sent from the high pressure water pump 71 to the reverse osmosis unit 72, and the fresh water having a salinity of 0.8 can be purified to a salinity of zero by the action of the reverse osmosis membrane. Then, the purified fresh water enters the activated carbon water filter 73 for further filtration and purification, and the fresh water is purified to fresh water containing the drinking water standard with zero salinity, and the purified fresh water is stored in the drinking water storage tank 74.

The above method of the present invention can be realized by a system for preparing fresh water by utilizing a temperature difference between seawater and fresh water condensation. As shown in FIG. 1, the system includes a water pump 10, a seawater storage container 20, a seawater heating container 30, an ultrasonic atomizer 40, a refrigerating device 50, and a fan 60, wherein the seawater storage container 20 passes through the pipeline and the The water pump 10 is connected, and the water pump 10 is connected to the seawater inlet through a pipe. A seawater filter 80 is connected between the water pump 10 and the seawater inlet to remove impurities in the seawater and better protect the seawater storage container 20. A water level controller 21 is provided in the upper portion of the seawater storage container 20, which may be a well-known water level controller such as a full water induction switch, which is connected to the water pump 10 so that the seawater entering the seawater storage container 20 reaches a set water level. At the same time, the water pump 10 stops pumping. When the water level is lower than the set water level, the water pump 10 starts pumping.

As shown in Fig. 1, the seawater heating vessel 30 is connected to the seawater storage vessel 20, and the serpentine condenser 521 of the condenser of the refrigeration unit passes through the seawater heating vessel 30, and the heat energy released by the condensation tube 521 is released. A heat source is provided for the seawater heating vessel 30. The seawater heating container 30 should be installed at a lower position than the seawater storage container 20, so that the seawater in the seawater storage container 20 can automatically flow into the seawater heating container 30 by the drop.

As shown in FIG. 1, the ultrasonic atomizer 40 includes a spray chamber 41, an ultrasonic ceramic sheet 42 and a plurality of high pressure nozzles 43. The ultrasonic ceramic sheet 42 is disposed at the bottom of the spray chamber 41. A plurality of high pressure nozzles 43 are disposed on the upper portion of the ultrasonic ceramic sheet 42, and each of the high pressure nozzles is aligned with the ceramic atomizing sheet. When the machine is turned off or every 24 hours, the high-pressure nozzle automatically sprays a high-pressure water column to the ceramic piece to clean the dirt on the ceramic piece, so as not to affect the atomization effect. A float valve 45 is provided in the upper portion of the atomization chamber 41 for controlling the liquid level of the heated seawater entering the atomization chamber 41. One end of the ultrasonic atomizer 40 is connected to the seawater heating container 30, and the other end of the ultrasonic atomizer 40 is connected to the evaporator 53 of the refrigeration apparatus via a mist duct 44.

As shown in FIG. 1, the refrigeration device 50 includes a refrigeration compressor 51, a condenser 52, an evaporator 53, and a heat dissipation fan 56, wherein a condenser 521 of the condenser 52 passes through the seawater heating vessel 30 and is The refrigeration compressor 51 is connected, and the heat energy released by the heat dissipation of the condensation pipe 521 can supply a heat source to the seawater heating vessel 30. The other end of the condenser pipe 521 is connected to the evaporator 53 via a refrigerant filter 54 and a capillary flow tube 55. The evaporator 53 includes a sealed dew chamber 531 and an evaporator body 532 disposed in the dew chamber 531. The evaporator 53 is connected to the refrigerant compressor 51, the condenser 52, and the ultrasonic atomizer 40, respectively. The heat dissipation fan 56 is disposed on the front side of the condenser 52. The refrigerating device 50 can simultaneously provide a heat source for the seawater heating vessel 30 and a low salinity mist for entering the evaporator 53 for low temperature condensation.

As shown in FIG. 1, the fan 60 is an exhaust fan, which is respectively connected to the evaporator 53 and the salt crystal powder collecting container 90, and is used for feeding the powdery salt crystal which is cold precipitated in the evaporator 53 into the salt crystal. The powder collection container 90 is collected.

In the above system of the present invention, the water pump 10 transports seawater to the seawater storage container 20, and then flows into the seawater heating vessel 30, and the heat energy released by the condenser 52 of the refrigeration device heats the seawater, and after heating The seawater enters the ultrasonic atomizer 40 for ultrasonic atomization, and then enters the evaporator 53 of the refrigeration device to perform low-temperature condensation to form freshwater.

The above system of the present invention can be used for the first-stage desalination treatment of seawater, and the fresh water discharged by the first-stage desalination treatment is sent to the fresh water storage container (not shown) for storage by the first-stage desalination treatment water outlet 100. The fresh water can be used as industrial water and irrigation or washing water.

In another embodiment of the system of the present invention, in order to further purify the fresh water of the first stage desalination treatment to meet the drinking water standard, a second-stage desalination treatment device is disposed at the output end of the evaporator 53 of the refrigeration apparatus. 70. As shown in FIG. 1, the second-stage desalination treatment device 70 includes a high-pressure water pump 71, a reverse osmosis unit 72, an activated carbon water filter 73, and a drinking water storage tank 74. The reverse osmosis unit 72 and the activated carbon water filter 73 may be A known reverse osmosis device and a activated carbon water filter are respectively connected to the evaporator 53 and the reverse osmosis unit 72, and the activated carbon water filter 73 is respectively connected to the reverse osmosis unit 72 and the drinking water storage tank. 74 connections. The fresh water after the first-stage desalination treatment is first sent to the reverse osmosis unit 72 by the high-pressure water pump 71, and the fresh water having a salinity of 0.8 is purified to a salinity of zero by the action of the reverse osmosis membrane, and then the activated carbon water is filtered. The device 73 purifies the fresh water into fresh water that meets the drinking water standard.

As shown in Fig. 1, when the system of the present invention is in operation, the water pump 10 transports seawater to the seawater storage container 20, and then flows into the seawater heating vessel 30, and the heat released by the condenser 52 of the refrigeration device releases heat energy to the seawater. Heating, the heated seawater enters the ultrasonic atomizer 40 for ultrasonic atomization, and after atomization, enters the evaporator 53 of the refrigeration device to perform low-temperature condensation to form fresh water, and the fresh water passes through the reverse osmosis unit 72 of the second-stage desalination treatment device 70. The activated carbon filter 73 is further purified, and after treatment, fresh water conforming to the drinking water standard is formed and flows into the drinking water storage tank 74 for storage.

Although the present invention has been disclosed by the above embodiments, the scope of the present invention is not limited thereto, and the above various components may be used without departing from the inventive concept. Domain personnel understand similar or equivalent components to replace.

Claims

A method for preparing fresh water by using a temperature difference between seawater and fresh water condensation, characterized in that the method comprises the following steps:

a, heating the seawater to 45 ° C ~ 65 ° C by the heat exchange heat of the refrigeration device;

b. performing first-stage desalination treatment on the heated seawater, the first-stage desalination treatment is ultrasonic atomizing the heated seawater, so that the fresh water in the seawater is first atomized to form a low-salt mist;

c. The low-salinity mist formed by the first-stage desalination treatment is subjected to low-temperature condensation treatment at a temperature of 8 ° C to 12 ° C by a refrigerating device, so that fresh water molecules in the low salinity mist are lower than the dew point of the salt water seawater condensation The dew water flows into the fresh water storage container, and the salinity of the dew condensation fresh water is below 0.8, and the undewed high salinity mist forms a powdery salt crystal for recovery.
The method of claim 1 wherein the method comprises the steps of:

a, heating the seawater to 45 ° C ~ 65 ° C by the heat exchange heat of the refrigeration device;

b. performing first-stage desalination treatment on the heated seawater, the first-stage desalination treatment is ultrasonic atomizing the heated seawater, so that the fresh water in the seawater is first atomized to form a low-salt mist;

c. The low-salinity mist formed by the first-stage desalination treatment is subjected to low-temperature condensation treatment at a temperature of 8 ° C to 12 ° C by a refrigerating device, so that fresh water molecules in the low salinity mist are lower than the dew point of the salt water seawater condensation The dew water flows into the fresh water storage container, and the salinity of the dew condensation fresh water is below 0.8, and the undewed high salinity mist forms a powdery salt crystal for recovery;

d. The fresh water obtained is subjected to a second-stage desalination treatment through a reverse osmosis membrane and activated carbon. Purify fresh water to fresh water that meets drinking water standards with zero salinity.
The method according to claim 1 or 2, wherein in step a, the heat exchange heat energy of the refrigeration unit is heat energy released by the condenser of the refrigeration unit.
The method according to claim 1 or 2, wherein in the step a, the seawater heating is to pump seawater into a seawater storage container, and then the seawater in the seawater storage container is introduced into the seawater heating vessel, and the refrigeration is performed. The heat released by the condenser of the device heats the seawater to a temperature of 45 ° C to 65 ° C.
The method according to claim 4, wherein in the step b, the first-stage desalination treatment is to introduce seawater heated by the seawater heating vessel into an ultrasonic atomizer, and ultrasonic waves are applied to the seawater by the ultrasonic generator. During the atomization process, the fresh water in the seawater is first atomized into a low-salt mist, and the salinity of the un-atomized seawater is increased from 15-20% before the desalination treatment to 30-40%, and the atomization is completed. The high salinity seawater is then discharged and fresh seawater is replenished into the ultrasonic atomizer.
The method according to claim 1 or 2, wherein in the step c, the low-temperature condensation treatment is to send the low-salinity mist after the first-stage desalination treatment to the temperature by the blower to a temperature of 8 ° C to 12 ° C. In the refrigeration evaporation chamber of the refrigeration unit, the low-salinity mist is cooled to precipitate salt, and the fresh water molecules are condensed into dew water and flow into the fresh water storage container. The uncondensed salt water mist is dehydrated and then sucked into the evaporation chamber by the blower to form a powdery salt crystal. It is recovered from the salt crystal powder collection container.
The method according to claim 2, wherein in step d, the obtained fresh water is pumped from a high pressure pump to a reverse osmosis device and a activated carbon water filter for a second-stage desalination treatment to purify fresh water to salinity. Zero.
A seawater desalination system for implementing the method of claim 1 wherein The system includes:

a water pump (10) connected to the seawater inlet;

a seawater storage container (20) connected to the water pump (10);

a seawater heating vessel (30) connected to the seawater storage vessel (20);

An ultrasonic atomizer (40) comprising a spray chamber (41), an ultrasonic ceramic sheet (42) disposed at the bottom of the spray chamber (41), and a plurality of high pressure nozzles (43) disposed on the upper portion of the ultrasonic ceramic sheet (42) The ultrasonic atomizer (40) is connected to the seawater heating vessel (30);

a refrigerating device (50) including a refrigerating compressor (51), a condenser (52), an evaporator (53), and a cooling fan (56), wherein a condenser (521) of the condenser (52) passes through The seawater heating vessel (30) is connected to the refrigeration compressor (51), and the evaporator (53) is respectively associated with the refrigeration compressor (51), the condenser (52) and the ultrasonic atomizer (40) Connected, the heat dissipation fan (56) is disposed on the front side of the condenser (52);

a fan (60) connected to the evaporator (53), and

The water pump (10) transports seawater to the seawater storage container (20), and then flows into the seawater heating vessel (30), and the heat energy released by the condenser (52) of the refrigeration device heats the seawater, and the heated The seawater enters the ultrasonic atomizer (40) and is ultrasonically atomized, and then enters the evaporator (53) of the refrigeration device to perform low-temperature condensation to form fresh water.
A seawater desalination system for implementing the method of claim 2, wherein the system comprises:

a water pump (10) connected to the seawater inlet;

a seawater storage container (20) connected to the water pump (10);

a seawater heating vessel (30) connected to the seawater storage vessel (20);

An ultrasonic atomizer (40) comprising a spray chamber (41), an ultrasonic ceramic sheet (42) disposed at the bottom of the spray chamber (41), and a plurality of high pressure nozzles (43) disposed on the upper portion of the ultrasonic ceramic sheet (42) The ultrasonic atomizer (40) is connected to the seawater heating vessel (30);

a refrigerating device (50) including a refrigerating compressor (51), a condenser (52), an evaporator (53), and a cooling fan (56), wherein a condenser (521) of the condenser (52) passes through The seawater heating vessel (30) is connected to the refrigeration compressor (51), and the evaporator (53) is respectively associated with the refrigeration compressor (51), the condenser (52) and the ultrasonic atomizer (40) Connected, the heat dissipation fan (56) is disposed on the front side of the condenser (52);

a fan (60) connected to the evaporator (53)

a second-stage desalination treatment device (70) comprising a high-pressure water pump (71), a reverse osmosis unit (72), an activated carbon water filter (73), and a drinking water storage tank (74), wherein the high-pressure water pump (71) respectively Connected to the evaporator (53) and the reverse osmosis unit (72), the activated carbon water filter (73) is respectively connected to the reverse osmosis unit (72) and the drinking water storage tank (74), and

The water pump (10) transports seawater to the seawater storage container (20), and then flows into the seawater heating vessel (30), and the heat energy released by the condenser (52) of the refrigeration device heats the seawater, and the heated The seawater enters the ultrasonic atomizer (40) for ultrasonic atomization and then enters the evaporator (53) of the refrigeration device to form low-temperature condensation to form fresh water, and the fresh water is treated by the second-stage desalination treatment device (70) to form a drinking water standard. Fresh water flows into the drinking water storage tank (74) for storage.
The system according to claim 8 or 9, wherein a seawater filter (80) is connected between the water pump (10) and the seawater inlet, and the seawater storage container (20) and the seawater heating container ( 30) a water level controller (21, 31) is respectively provided in the cold A refrigerant filter (54) and a capillary flow tube (55) are disposed between the condenser (52) and the evaporator (53), and a salt crystal powder collecting container (90) is connected to the output end of the fan (60). A first stage desalination water outlet (100) and a drinking water storage tank (74) are connected to an output end of the evaporator (53) of the refrigeration unit.