CN203159268U - solar air conditioning seawater desalination system - Google Patents

Abstract

The utility model relates to the technical field of seawater desalination and in particular relates to a solar air conditioning seawater desalination system. The solar air conditioning seawater desalination system comprises a solar heat collection device, a seawater desalination system and a refrigeration device; after steam generated by the heat absorption of lithium bromide solution of a lithium bromide inspissator enters into tube pass of a lithium bromide evaporator to be condensed into plain water, the plain water enters into an evaporation absorber through a heat exchanger, and the lithium bromide solution in the lithium bromide inspissator enters into the evaporation absorber through the heat exchanger; and steam, generated because the lithium bromide solution in the evaporation absorber enters into shell pass of the lithium bromide evaporator to absorb heat, enters into a first effect evaporator to act as a heat source for the seawater desalination, and the condensed lithium bromide solution enters into the lithium bromide inspissator. By adopting the technical scheme provided by the utility model, the energy utilization rate of solar energy is improved, and the technical scheme is suitable for expanding the scale of the solar air conditioning seawater desalination system.

Description

A solar air-conditioning seawater desalination system

technical field

The utility model relates to the technical field of seawater desalination, in particular to a solar air-conditioning seawater desalination system.

Background technique

my country's seawater desalination technology started earlier. At present, the main development method of solar seawater desalination technology is solar photovoltaic power station power generation, and seawater desalination is carried out through reverse osmosis with micro-grid power supply. The efficiency of solar photovoltaic power generation is very low, so the energy utilization is very low. Solar seawater desalination technology also adopts low-temperature multi-effect seawater desalination technology. Low-temperature multi-effect technology refers to multi-effect distillation and desalination technology whose maximum evaporation temperature of seawater is lower than 70°C. It is to connect multiple evaporators in series and use a certain amount of steam input Through multiple evaporation and condensation, and the evaporation temperature of the previous effect evaporator is higher than that of the latter effect evaporator, the desalination process of distilled water that is multiple times the amount of steam is obtained. Solar energy low-temperature multi-effect seawater desalination technology has developed rapidly in recent years due to energy-saving factors.

At present, solar air conditioners mainly adopt absorption refrigeration technology, which is a technology that uses the absorption and evaporation characteristics of absorbents for refrigeration. Specifically, solar collectors absorb solar radiation and transfer the generated heat to heat transfer media. The heat medium is used for heat exchange, and then the absorption and evaporation properties of the absorbent are used for refrigeration, but there is energy waste in this process, which is not conducive to scaling up.

The defect of the prior art is that the energy utilization rate in the solar seawater desalination system is low, and there is energy waste in the solar air conditioning system.

Utility model content

The purpose of the utility model is to provide a solar air-conditioning seawater desalination system to improve energy utilization.

The utility model solar air-conditioning seawater desalination system comprises: a solar heat collecting device, a seawater desalination device and a refrigeration device, wherein,

The solar heat collecting device comprises a solar heat collector, a lithium bromide concentrator and a closed heat conduction pipe equipped with a heat conduction medium, and the solar heat collector and the lithium bromide concentrator are arranged on the pipeline of the heat conduction pipe;

The seawater desalination device includes a condenser and at least two effect evaporators, wherein the final effect evaporator located at one end of the at least two effect evaporators communicates with the condenser;

The refrigerating device includes an evaporative absorber, and a lithium bromide evaporator and a refrigerator respectively communicated with the evaporative absorber, and the lithium bromide evaporator is respectively communicated with the lithium bromide concentrator and the first effect evaporator located at the other end of at least two effect evaporators;

The steam generated by the heat absorption of the lithium bromide solution in the lithium bromide concentrator enters the tube side of the lithium bromide evaporator to condense into fresh water and then enters the evaporation absorber through a heat exchanger, and the lithium bromide solution in the lithium bromide concentrator enters the evaporation absorber through a heat exchanger; The lithium bromide solution in the evaporation absorber enters the shell side of the lithium bromide evaporator, and the steam generated by heat absorption enters the first effect evaporator as a heat source for seawater desalination, and the concentrated lithium bromide solution enters the lithium bromide concentrator.

Preferably, the solar heat collector is a high temperature solar heat collector.

Preferably, the high-temperature solar collector is a trough-type glass vacuum tube collector.

Preferably, the heat-conducting medium is heat-conducting oil, and a heat-conducting oil lift pump is arranged on the heat-conducting pipe.

Preferably, the lithium bromide concentrator is a high-temperature concentrator, including a shell and a demister arranged at the top of the shell.

Preferably, the lithium bromide evaporator includes a shell, a heat exchange tube bundle located in the shell, a shower above the heat exchange tube bundle, and a fresh water collection tank located at one end of the heat exchange tube bundle.

Preferably, the seawater in the condenser is divided into two streams after passing through the seawater circulation pump, one stream is pumped into at least two-effect evaporators, and the other stream is directly discharged.

Preferably, the evaporation absorber includes an evaporation chamber, an absorption chamber and a demister between the evaporation chamber and the absorption chamber, the fresh water in the evaporation chamber is used for refrigeration, and the lithium bromide solution in the absorption chamber is pumped into the lithium bromide by a liquid pump to evaporate shell side of the device.

Preferably, the heat exchanger includes two stages of heat exchangers, namely a heat recovery heat exchanger and a cooling water heat exchanger.

Preferably, the heat exchanger is a casing heat exchanger or a plate heat exchanger.

In the solar air-conditioning seawater desalination system of the utility model, since the heat energy obtained by the solar heat collector is used for seawater desalination and refrigeration respectively through the circulation of the lithium bromide evaporator and the lithium bromide concentrator, and the waste heat is rationally used through the heat exchanger, the improvement of Energy utilization efficiency. In addition, the steam generated in the lithium bromide evaporator is used as a heat source for seawater desalination, which can improve solar energy utilization efficiency and increase water production.

Description of drawings

Fig. 1 is a structural schematic diagram of a solar air-conditioning seawater desalination system of the present invention.

Reference signs:

1-original sea water inlet; 2-sea water discharge port; 3-concentrated sea water discharge port; 4-fresh water discharge port;

5-cooling water discharge port; 6-cooling water inlet; 7-solar collector; 8-heat transfer oil lift pump;

9-lithium bromide concentrator; 10-lithium bromide evaporator; 11-evaporator; 12-condenser;

13-sea water circulation pump; 14-concentrated sea water pump; 15-fresh water pump; 16-regeneration heat exchanger;

17-regeneration heat exchanger; 18-cooling water heat exchanger; 19-cooling water heat exchanger; 20-liquid pump;

21-absorption chamber; 22-evaporation chamber; 23-refrigerator; 24-heat pipe; 25-evaporation absorber

Detailed ways

In order to solve the technical problem of low energy utilization rate of the solar seawater desalination system in the prior art, the utility model provides a solar air-conditioning seawater desalination system. In the technical scheme of the utility model, since the heat energy obtained by the solar heat collector is used for seawater desalination and refrigeration respectively through the circulation of the lithium bromide evaporator and the lithium bromide concentrator, and the waste heat is rationally used through the heat exchanger, the energy utilization rate is improved , In addition, the steam generated in the lithium bromide evaporator is used as a heat source for seawater desalination, which can expand the scale of seawater desalination and increase the water production. In order to make the purpose, technical solutions and advantages of the utility model clearer, the following examples are given to further describe the utility model in detail.

As shown in Figure 1, the solar air-conditioning seawater desalination system of the utility model includes: a solar heat collection device, a seawater desalination device and a refrigeration device, wherein,

The solar thermal collector comprises a solar heat collector 7, a lithium bromide concentrator 9 and a closed heat pipe 24 equipped with a heat transfer medium, and the solar heat collector 7 and the lithium bromide concentrator 9 are arranged on the pipeline of the heat pipe 24;

The seawater desalination device includes a condenser 12 and at least two effect evaporators 11, wherein the final effect evaporator located at one end of the at least two effect evaporators 11 communicates with the condenser 12;

The refrigerating device comprises an evaporative absorber 25, and a lithium bromide evaporator 10 and a refrigerator 23 communicated with the evaporative absorber 25 respectively. The effect evaporator is connected;

The steam generated by the heat absorption of the lithium bromide solution in the lithium bromide concentrator 9 enters the lithium bromide evaporator 10 tube side and is condensed into fresh water, and then enters the evaporation absorber through a heat exchanger, and the lithium bromide solution in the lithium bromide concentrator 9 enters the described evaporation absorber through a heat exchanger. Evaporation absorber: the lithium bromide solution in the evaporation absorber enters the shell side of the lithium bromide evaporator 10 to absorb heat, and the steam generated enters the first effect evaporator as a heat source for seawater desalination, and the concentrated lithium bromide solution enters the lithium bromide concentrator 10.

In the technical solution of the utility model, the heat energy generated by the solar collector absorbing solar radiation is transported to the lithium bromide solution in the lithium bromide concentrator through the heat transfer medium in the heat transfer tube, and the lithium bromide solution absorbs heat to form steam and enter the tube side of the lithium bromide evaporator The lithium bromide solution in the shell side of the lithium bromide evaporator exchanges heat with the steam in the tube side to form secondary steam as the steam source in the seawater desalination device. Seawater desalination of single-effect, four-effect and five-effect evaporators can even be used for desalination of six-effect or seven-effect evaporators, which expands the scale of seawater desalination, increases water production, and improves energy utilization. In addition, the heat energy output by the solar heat collecting device is also used for cooling, and the energy is utilized in multiple parts, thereby improving the energy utilization rate.

Preferably, the solar heat collector 7 is a high temperature solar heat collector.

Those skilled in the art know that solar thermal collectors can be classified into high-temperature solar thermal collectors, medium-temperature solar thermal collectors and low-temperature solar thermal collectors according to the working temperature range. Preferably, using a high-temperature solar collector, the temperature of the heat-conducting medium in the heat pipe can reach 160-170 degrees Celsius, or even 200 degrees Celsius. Such a high-temperature heat-conducting medium makes it easier to evaporate the lithium bromide solution in the lithium bromide concentrator. In order to further improve the energy utilization rate, according to the steam conditions generated by the lithium bromide concentrator, heat pump equipment can be added to increase the steam circulation capacity, so that the processing capacity of lithium bromide solution concentration can be increased, and the cooling capacity of the air conditioner can be increased.

Preferably, the high temperature solar heat collector is a trough glass vacuum tube heat collector.

The glass vacuum tube is placed in the trough-shaped solar absorbing plate to increase the absorption efficiency of solar energy and further improve the energy utilization rate.

Preferably, the heat transfer medium is heat transfer oil, and the heat transfer oil lift pump 8 is arranged on the heat transfer pipe 24 .

The heat conduction medium adopts heat conduction oil, and the height difference between the solar collector and the lithium bromide concentrator can be set according to the actual situation to realize the flow of the heat conduction oil with a density difference. Preferably, when the density difference of the heat conduction oil is not enough to support the heat transfer oil to flow in the heat transfer tube , a heat transfer oil lift pump 8 can be set on the heat transfer pipe to serve as the power for transporting the heat transfer oil.

Preferably, the lithium bromide concentrator 9 is a high-temperature concentrator, including a shell and a demister arranged at the top of the shell.

Matching with the high-temperature solar heat collector, the lithium bromide concentrator also uses a high-temperature concentrator. Because the solar heat collector makes the temperature of the heat transfer oil very high, when the high temperature heat transfer oil exchanges heat with the lithium bromide solution through the heat transfer tube, the lithium bromide solution produces High-temperature steam, so a high-temperature concentrator is used, and the demister at the top of the shell is used to remove lithium bromide droplets from the steam entering the lithium bromide evaporator.

Preferably, the lithium bromide evaporator 10 includes a housing, a heat exchange tube bundle located in the housing, a shower located above the heat exchange tube bundle, and a fresh water collection tank located at one end of the heat exchange tube bundle.

The lithium bromide evaporator adopts a shell-and-tube heat exchanger, which can be one or two or even more. The lower temperature lithium bromide solution is sprayed to the outer wall of the heat exchange tube bank through the sprayer, and exchanges heat with the hot steam in the heat exchange tube bank. Lithium bromide concentrator, hot steam condenses to form fresh water which is collected through the fresh water collection tank, and is used as the source of low temperature cold water in the refrigeration unit.

Preferably, the seawater in the condenser 12 connected to the low-temperature multi-effect evaporator is divided into two streams by the seawater circulation pump 13, one stream is pumped into at least two evaporators 11, and the other stream is directly discharged.

The seawater entering through the original seawater inlet 1 is preferably simply pre-treated seawater. After the seawater enters the condenser 12 to absorb heat, it is lifted by the seawater circulation pump 13 and divided into two strands. One strand enters the evaporator 11. The number of evaporators 11 is at least Two effects, the evaporator is a low-temperature multi-effect evaporator, one stream of seawater is pumped into the multi-effect evaporator along with the pipeline, and the other seawater is directly discharged.

Preferably, the evaporative absorber 25 includes an evaporating chamber 22, an absorbing chamber 21 and a demister between the evaporating chamber 22 and the absorbing chamber 21, the fresh water in the evaporating chamber 22 is used for refrigeration, and the lithium bromide solution in the absorbing chamber 21 passes through the liquid The pump 20 pumps into the shell side of the lithium bromide evaporator 10 .

The evaporation chamber 22 of the evaporation absorber 25 communicates with the absorption chamber 21 through the demister, and the steam formed by the evaporation of fresh water in the evaporation chamber 22 enters into the absorption chamber 21 through the demister, dilutes the lithium bromide solution in the absorption chamber 21, and the evaporation chamber The fresh water in 22 is the low-temperature fresh water obtained through heat exchange from the fresh water in the lithium bromide evaporator, and the low-temperature fresh water enters the refrigerator 23 for refrigeration, wherein, the fresh water circulation in the refrigerator 23 is a self-circulation of temperature difference, or an auxiliary liquid suction pump is used Promote the fresh water circulation in the refrigerator 23; the lithium bromide solution in the absorption chamber 21 is the lithium bromide solution obtained by the lithium bromide solution in the lithium bromide concentrator 9 through a heat exchanger, and the lithium bromide solution is diluted by the fresh water evaporated from the evaporation chamber 22, and the absorption chamber The lithium bromide solution in 21 is pumped into the lithium bromide evaporator through the liquid pump 20 to absorb heat and generate steam as a heat source for the seawater desalination device.

Preferably, the heat exchanger includes two stages of heat exchangers, namely a heat recovery heat exchanger and a cooling water heat exchanger.

The lithium bromide solution in the concentrated lithium bromide 9 enters the absorption chamber 21 after passing through the two-stage heat exchanger, i.e., the regenerative heat exchanger 16 and the cooling water heat exchanger 18; the fresh water in the lithium bromide evaporator 10 passes through the two-stage heat exchanger, i.e. The regenerative heat exchanger 17 and the cooling water heat exchanger 19 cool down and then enter the evaporation chamber 22. The fresh water can also be fresh water formed by combining the fresh water in the lithium bromide evaporator 10 and the first effect evaporator. The cooling water heat exchanger 18 and the cooling water heat exchanger 19 pass cooling water in addition, as shown in Figure 1, the cooling water enters from the cooling water inlet 6 and is divided into two strands, which enter the cooling water heat exchanger 18 and the cooling water heat exchanger respectively. The water heat exchanger 19 is discharged through the cooling water discharge port 5; the other fluids in the recuperation heat exchanger 16 and the recuperation heat exchanger 17 are two lithium bromide solutions pumped in from the absorption chamber 21 by the liquid pump 20. The temperature of the lithium bromide solution is lower, and enters the lithium bromide evaporator 10 after the regenerative heat exchanger 16 and the regenerative heat exchanger 17 heat up. The recuperation heat exchanger 16 and the recuperation heat exchanger 17 respectively utilize the waste heat of the lithium bromide solution in the lithium bromide concentrator 9 and the waste heat of fresh water flowing out of the lithium bromide evaporator 10, which increases the utilization of waste heat.

Preferably, the heat exchanger is a casing heat exchanger or a plate heat exchanger.

The two recuperation heat exchangers and the two cooling water heat exchangers can be tube-type heat exchangers or plate-type heat exchangers. The tube-type heat exchangers are more sufficient for heat exchange of small flow media and can better utilize lithium bromide absorption The heat exchange of the lithium bromide solution pumped out of the room improves the energy utilization rate.

An optimal specific embodiment is listed below to illustrate the solar air-conditioning seawater desalination system of the present invention and its working principle, as shown in Figure 1, including all devices in Figure 1, of course, the utility model is not limited to the following embodiments. According to the flow direction of the steam, the multi-effect evaporator is the first effect evaporator, the second effect evaporator, the third effect evaporator, and finally the final effect evaporator, and the steam of the final effect evaporator is passed into the condenser.

As shown in Figure 1, the solar air-conditioning seawater desalination system of the present invention includes: a solar heat collecting device, a seawater desalination device and a refrigeration device, respectively corresponding to a solar heat transfer cycle, a seawater desalination process and a refrigeration cycle.

The devices used in the solar heat transfer cycle include: solar heat collector 7, heat conduction oil lift pump 8, lithium bromide concentrator 9, heat conduction pipe 24, wherein, the heat conduction medium in the heat conduction pipe 24 is heat conduction oil, and the transmission power of heat conduction oil can be temperature Poor or heat transfer oil lift pump 8, the height difference between solar heat collector 7 and lithium bromide concentrator 9 can be designed according to the actual situation, and the density difference flow of heat transfer oil can be realized; The heat transfer medium inside heats up. The hot heat conduction medium enters the lithium bromide concentrator 9 for heat exchange to lower the temperature. The heat transfer medium whose temperature has decreased returns to the solar heat collector 7 after passing through the heat conduction oil lift pump 8 and continues to absorb heat and heat up.

The devices used in the seawater desalination process include: at least a two-effect evaporator 11, a condenser 12, a seawater circulation pump 13, a concentrated seawater pump 14 and a freshwater pump 15, wherein the evaporator is a low-temperature multi-effect evaporator, and the condenser can also be a single-effect evaporator. Or two effects, the final effect evaporator is connected to the condenser 12; the seawater entering through the raw seawater inlet 1 is simply pretreated seawater, the seawater enters the condenser 12 and is lifted by the seawater circulation pump 13 after absorbing heat, and part of it enters Part of the evaporator 11 is discharged through the seawater discharge port 2; the concentrated seawater produced by the evaporator 11 is discharged from the concentrated seawater discharge port 3 through the concentrated seawater pump 14, and the fresh water produced by the evaporator 11 is discharged from the fresh water discharge port 4 through the fresh water pump 15.

The equipment used in the refrigeration cycle includes: lithium bromide concentrator 9, lithium bromide evaporator 10, heat recovery heat exchanger 16, heat recovery heat exchanger 17, cooling water heat exchanger 18, cooling water heat exchanger 19, liquid pump 20, absorption chamber 21. The evaporation chamber 22 and the refrigerator 23; the lithium bromide concentrator 9 absorbs the heat of the heat transfer oil in the heat transfer tube 24, heats the lithium bromide solution inside to generate steam, and the steam enters the lithium bromide evaporator 10 after passing through the demister on the top of the shell, And the concentrated lithium bromide solution enters the regenerative heat exchanger 16 and the cooling water heat exchanger 18 successively under the effect of the pressure difference, and then enters the absorption chamber 21 of the evaporation absorber. The operating pressure of the lithium bromide concentrator 9 is positive pressure, and the evaporation The operating pressure of the absorber absorption chamber 21 is a negative pressure, and such pressure difference impels the concentrated lithium bromide solution to flow into the absorption chamber 21 from the lithium bromide concentrator 9;

The lithium bromide evaporator 10 communicates with the lithium bromide concentrator 9, and the steam generated by the lithium bromide concentrator 9 enters the lithium bromide evaporator 10. The lithium bromide solution sprayed by the shower in the lithium bromide evaporator 10 exchanges heat with the steam in the tube side, and the lithium bromide solution absorbs heat to form steam as the steam in the tube side of the first effect evaporator in the seawater desalination device, and the concentrated lithium bromide solution Enter the lithium bromide concentrator 9 again through the connecting pipe at the bottom;

After the lithium bromide solution in the absorption chamber 21 of the evaporation absorber 25 absorbs the steam generated in the evaporation chamber 22 for dilution, after being lifted by the liquid pump 20, it is divided into two branches, one enters the recuperation heat exchanger 16, and the other enters the recuperation heat exchanger. Heater 17, the lithium bromide solution after absorbing heat respectively enters the sprinkler of lithium bromide evaporator 10 and sprays out; The heat exchanger 19 is discharged through the cooling water discharge port 5;

Lithium bromide evaporator 10 vapor condensation produces fresh water and the first effect evaporator of evaporator 11 produces fresh water, which enters the evaporation chamber 22 of the evaporative absorber after being cooled by the heat recovery heat exchanger 17 and the cooling water heat exchanger 19; the refrigerator 23 The internal medium is low-temperature fresh water inside the evaporation chamber 22 of the evaporation absorber, and the water after absorbing heat returns to the evaporation chamber 22 .

Lithium bromide evaporator 10, evaporator 11, condenser 12 in Fig. 1, and the operating conditions of evaporation chamber 22 and absorption chamber 21 of evaporative absorber 25 are all negative pressure, so in order to ensure that the above-mentioned device is negative pressure, it is necessary to pump Vacuum equipment, commonly used is a vacuum pump (not shown in Figure 1).

In the technical solution of the utility model, the solar heat collector exchanges heat with the lithium bromide solution in the lithium bromide concentrator through the heat conduction tube, and the steam generated by the heat absorption of the lithium bromide solution in the lithium bromide concentrator enters the tube side of the lithium bromide evaporator to condense to form fresh water, The fresh water enters the evaporator absorber for refrigeration after being cooled by the heat exchanger; the lithium bromide solution in the evaporative absorber is pumped into the shell side of the lithium bromide evaporator through a liquid pump to absorb heat to form steam and enter at least two effect evaporators of the seawater desalination device, The concentrated lithium bromide solution enters the lithium bromide concentrator. The specific device of the present invention is not limited to the device shown in Fig. 1, but uses the above three processes to desalinate seawater by solar energy and use it for refrigeration. With the above-mentioned system, the solar energy absorbed by the solar collector is transferred to the lithium bromide solution in the lithium bromide concentrator through the heat transfer medium, and the lithium bromide concentrator and the lithium bromide evaporator pass the evaporation cycle of the lithium bromide solution to the low-temperature multiple-effect evaporator for use. For seawater desalination, the concentrated lithium bromide solution is sent to the evaporative absorber to participate in air-conditioning refrigeration, which improves the utilization rate of solar energy and is conducive to expanding the scale of solar air-conditioning seawater desalination systems.

Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (10)

1. A solar air-conditioning seawater desalination system is characterized in that, comprising: a solar thermal collector, a seawater desalination device and a refrigeration unit, wherein, The solar heat collection device includes a solar heat collector (7), a lithium bromide concentrator (9) and a closed heat pipe (24) equipped with a heat conduction medium, and the solar heat collector (7) and the lithium bromide concentrator (9) Set on the pipeline of the heat pipe (24); The seawater desalination device includes a condenser (12) and at least two-effect evaporators (11), wherein the final-effect evaporator located at one end of the at least two-effect evaporator (11) communicates with the condenser (12); The refrigerating device includes an evaporative absorber (25), and a lithium bromide evaporator (10) and a refrigerator (23) respectively connected to the evaporative absorber (25), and the lithium bromide evaporator (10) is respectively connected to the lithium bromide concentrator ( 9) communicate with the first effect evaporator located at the other end of at least two effect evaporators (11); The steam generated by the heat absorption of the lithium bromide solution in the lithium bromide concentrator (9) enters the tube side of the lithium bromide evaporator (10) to condense into fresh water and then enters the evaporation absorber through a heat exchanger. The lithium bromide solution in the lithium bromide concentrator (9) is exchanged The heater enters the evaporative absorber; the lithium bromide solution in the evaporative absorber enters the shell side of the lithium bromide evaporator (10), and the steam generated by heat absorption enters the first effect evaporator as a heat source for seawater desalination, and the concentrated lithium bromide solution enters the lithium bromide evaporator (10). Concentrator (10). 2. The solar air-conditioning seawater desalination system according to claim 1, characterized in that, the solar heat collector (7) is a high-temperature solar heat collector. 3. The solar air-conditioning seawater desalination system according to claim 2, characterized in that, the high-temperature solar heat collector is a trough-type glass vacuum tube heat collector. 4. The solar air-conditioning seawater desalination system according to claim 1, characterized in that, the heat transfer medium is heat transfer oil, and a heat transfer oil lift pump (8) is arranged on the heat transfer pipe (24). 5. The solar air-conditioning seawater desalination system according to claim 1, characterized in that, the lithium bromide concentrator (9) is a high-temperature concentrator, comprising a shell and a demister arranged at the top of the shell. 6. The solar air-conditioning seawater desalination system according to claim 1, characterized in that, the lithium bromide evaporator (10) comprises a shell, a heat exchange tube bundle located in the shell, a sprayer located above the heat exchange tube bundle, and Fresh water collection tank located at one end of the heat exchange tube bundle. 7. The solar air-conditioning seawater desalination system according to claim 1, characterized in that, the seawater in the condenser is divided into two strands after passing through the seawater circulation pump (13), and one strand is pumped into at least two effect evaporators (11 ), a stream of direct emissions. 8. The solar air-conditioning seawater desalination system according to claim 1, characterized in that, the evaporation absorber (25) includes an evaporation chamber (22), an absorption chamber (21) and an The demister between the chambers (21), the fresh water in the evaporation chamber (22) is used for refrigeration, and the lithium bromide solution in the absorption chamber (21) is pumped into the shell side of the lithium bromide evaporator (10) through the liquid pump (20). 9. The solar air-conditioning seawater desalination system according to claim 1, wherein the heat exchanger comprises two-stage heat exchangers, which are respectively a heat recovery heat exchanger and a cooling water heat exchanger. 10. The solar air-conditioning seawater desalination system according to claim 1, wherein the heat exchanger is a casing heat exchanger or a plate heat exchanger.

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