Solar salt pond self-heating system and method for desalting strong brine

Abstract

The invention relates to a solar salt pond self-heating system and method for desalting strong brine, the upper part of a strong brine pond is also provided with a support wall connected with the top of a front-side fresh water evaporation and collection membrane, the inner side surface of the support wall is provided with a solar radiation heating evaporation wall, and the top surface of the solar radiation heating evaporation wall is provided with a strong brine spraying pipe; the bottom of the solar radiation heating evaporation wall is matched with the top surface of the concentrated brine tank, a self-adaptive heating evaporation frame is arranged in the concentrated brine tank, and a fresh water collection channel is connected to the bottom of the fresh water collection membrane; the evaporation wall absorbs solar energy and converts the solar energy into heat energy, then fresh water vaporizing treatment is carried out on strong brine, then fresh water resources are recycled after condensation, the evaporation wall adopts a unique multi-trapezoid-face structure, and flow dividing and dispersing treatment is carried out in the process that the strong brine flows from top to bottom; in the downward flowing process, the contact area of strong brine and the outer surface of the evaporation wall is large, rapid evaporation is facilitated, and the desalination efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of water treatment, and in particular to a solar salt pond self-heating system and method for desalinating concentrated brine. Background Art

[0002] Brine refers to water with a high concentration of salt. Its main characteristics include high concentrations of soluble salts, such as sodium chloride and sodium carbonate. Brine is not suitable for drinking or agricultural irrigation. The formation of brine is closely related to geographical environment and climatic conditions. Although the water chemistry of brine is complex, it can be used for aquaculture, irrigation, etc. through proper improvement and treatment. Desalination and other management and development can bring significant ecological, economic and social benefits.

[0003] There are various ways to treat concentrated brine. Among them, solar desalination technology is widely used because of its low cost and clean energy. Compared with traditional power sources and heat sources, solar energy has the advantages of safety and environmental protection. Combining solar energy collection with desalination process is a sustainable desalination technology. It has gradually attracted people's attention due to its advantages of not consuming conventional energy, no pollution, and high purity of fresh water. It uses the heat generated by solar energy to evaporate the concentrated brine in the salt pool, and uses the steam water accumulation film installed on the upper part to collect water vapor, so as to separate and collect fresh water. However, in the specific use process, there are many factors that affect solar distillation and desalination water. First, solar radiation is the main heat source of the solar distillation system. The radiation intensity directly affects the water output and efficiency of the system. The higher the radiation intensity, the higher the distillation efficiency, and the water output also increases accordingly. When the solar radiation intensity is low, its desalination efficiency decreases. Secondly, the ambient temperature has a significant impact on the distillation process. Higher ambient temperature will accelerate the evaporation rate of water vapor, thereby increasing the water output and efficiency. When the external environment temperature decreases, its desalination efficiency decreases. Thirdly, in a low humidity environment, water vapor is more likely to condense into liquid water, thereby increasing water production and efficiency. If the humidity in the enclosed space above the overall salt pool is high, it will affect the desalination efficiency.

[0004] In view of the above problems, the present invention provides a solar salt pond self-heating system and method for desalinating concentrated brine, aiming to solve the problem of reduced desalination efficiency caused by factors such as low solar radiation intensity, low ambient temperature, and excessive humidity during the desalination of concentrated brine. Summary of the invention

[0005] The present invention provides a solar salt pond self-heating system and method for desalinating concentrated brine, which has a simple structure, is easy to operate, and has high carbonization efficiency. It can make up for the defect of low solar radiation intensity, provide a self-heating desalination effect, effectively solve the problem of high humidity and low desalination efficiency after the temperature is reduced, and realize efficient desalination operation. The method is simple and easy to operate, and is used to overcome the defects in the prior art.

[0006] The technical solution of the present invention is achieved as follows: a solar salt pond self-heating system for desalinating concentrated brine comprises a concentrated brine pond, a front freshwater evaporation collection membrane obliquely arranged on the upper part of the concentrated brine pond, a supporting wall connected to the top of the front freshwater evaporation collection membrane is also arranged on the upper part of the concentrated brine pond, a solar radiation heating evaporation wall is arranged on the inner side of the supporting wall, a concentrated brine spray pipe is arranged on the top surface of the solar radiation heating evaporation wall, the bottom of the solar radiation heating evaporation wall is matched with the top surface of the concentrated brine pond, an adaptive heating evaporation frame is arranged in the concentrated brine pond, and a freshwater collection channel is connected to the bottom of the freshwater collection membrane.

[0007] Furthermore, the solar radiation heating evaporation wall is composed of a top surface, a bottom surface, a front side surface and two oblique side surfaces. The front side surface and the two oblique side surfaces are both trapezoidal plate structures. The angles between the front side surface and the two oblique side surfaces and the horizontal plane are not less than 60 degrees. A sewage pipe is provided at the bottom of the concentrated brine pool.

[0008] Furthermore, a transverse support platform is provided on the top of the support wall, a front oblique support rod is provided on the front side of the transverse support platform, a front fresh water evaporation collection membrane is provided on the inner side of the front oblique support rod, and a rear oblique support rod is provided on the rear side of the transverse support platform, and a concentrated brine delivery pipeline connected to the concentrated brine spray pipe is installed on the rear oblique support rod.

[0009] Furthermore, side fresh water evaporation collection membranes are arranged between the support wall and both sides of the front fresh water evaporation collection membrane, and auxiliary collection channels connected to the fresh water collection channels are arranged at the bottom of the side fresh water evaporation collection membranes.

[0010] Furthermore, a heating tube is arranged inside the adaptive heating evaporation frame, the top of the adaptive heating evaporation frame is fixedly connected to the bottom output end of the vertical lifting rod, and the vertical lifting rod is installed on the upper part of the concentrated brine pool through a bracket.

[0011] Furthermore, the front side surface and the two oblique side surfaces include an inner thermal insulation layer, a solar radiation heat absorption layer is arranged on the front side of the inner thermal insulation layer, a heat absorption coating is evenly sprayed on the solar radiation heat absorption layer, a heat-resistant, light-transmitting, heat-conductive protective layer is arranged on the outside of the heat absorption coating, a spray port matching the front side surface and the top of the two oblique side surfaces is arranged at the bottom of the concentrated brine spray pipe, and the supporting wall is connected to the inner thermal insulation layer arranged on the front side surface through a third connecting cross bar.

[0012] Furthermore, the top width of the front side surface is not greater than its bottom width, the bottom width of the front side surface is not greater than the width of the concentrated brine pool, the top width of the oblique side surface is not greater than its bottom width, and the bottom width of the oblique side surface is not greater than one quarter of the length of the concentrated brine pool.

[0013] Furthermore, a first connecting cross bar is arranged between the rear oblique support rod and the supporting wall, a second connecting cross bar is arranged between two adjacent rear oblique support rods, the supporting wall is arranged on the top outer edge of the length direction of the concentrated brine pool or on the bottom wall of the concentrated brine pool, the supporting wall is perpendicular to the horizontal plane or inclined toward the rear oblique support rod, and the lateral supporting platform is a plate-like structure parallel to the horizontal plane.

[0014] Furthermore, a line limit tube is provided on the top of the adaptive heating evaporation frame, and a line installation hole matching the line limit tube is opened on the supporting wall. The heating tube is connected to a controller arranged on the outside of the supporting wall through a wire installed in the line limit tube and the line installation hole.

[0015] A method for desalinating concentrated brine using a solar salt pond self-heating system, the method comprising:

[0016] When the solar radiation intensity reaches the preset requirement, the front side and the two oblique side absorb sunlight and convert it into heat energy to generate heat. After reaching the preset temperature, the concentrated brine is sprayed to the top of the front side and the two oblique side through the spray port set at the bottom of the concentrated brine spray pipe and flows downward. During the flow process, the heat energy on the surface of the front side and the two oblique side is absorbed by the concentrated brine, and the fresh water component in the concentrated brine gradually evaporates to form water vapor. The water vapor is condensed by the fresh water evaporation collection membrane on the front side and collected in the fresh water collection channel. The remaining concentrated brine is finally recovered to the concentrated brine pool through the bottom of the front side and the two oblique side surfaces.

[0017] Alternatively, when the solar radiation intensity does not meet the preset requirements, the concentrated brine is directly transported to the concentrated brine pool, the heating tube is turned on, the heating temperature is controlled by the controller, and the vertical lifting rod is started to drive the adaptive heating evaporation frame to rise and fall. The setting height of the heating tube is made corresponding to the height of the concentrated brine liquid level. The fresh water component in the concentrated brine evaporates to form water vapor, which is condensed by the fresh water evaporation collection membrane on the front side and collected in the fresh water collection channel.

[0018] The present invention has the following positive effects:

[0019] 1. The solar salt pond self-heating system for desalinating concentrated brine is capable of utilizing clean solar energy to desalinate concentrated brine. The concentrated brine is vaporized after absorbing solar energy through the evaporation wall and converted into heat energy. The fresh water resources are then recovered after condensation. The evaporation wall adopts a unique multi-trapezoidal surface structure. During the flow of concentrated brine from top to bottom, diversion and dispersion are implemented. During the downward flow, the concentrated brine has a large contact area with the outer surface of the evaporation wall, which is conducive to rapid evaporation and improves the desalination efficiency.

[0020] 2. The solar salt pool self-heating system for desalinating brine can turn on the heating tube to heat and evaporate the brine in the brine pool when the solar radiation intensity is low or the temperature is low. Through adaptive height adjustment, the effective heating surface of the heating tube is always matched with the brine liquid level, thereby improving the thermal energy utilization efficiency and desalination efficiency.

[0021] 3. The evaporation wall of the solar salt pond self-heating system for desalinating concentrated brine is a multi-layer design structure, with the bottom layer being a thermal insulation layer and the outer layer being a transparent, heat-resistant, light-transmitting, thermally conductive protective layer, which is conducive to the conduction of heat to the outer layer to be absorbed by the concentrated brine and then desalinated and evaporated. At the same time, its light-to-heat energy conversion efficiency is high, and the surface is easy to clean, which is conducive to the operation of maintenance operations.

[0022] 4. The solar radiation heating evaporation wall of the solar salt pond self-heating system for desalinating concentrated brine is designed with an inclined front and two side surfaces, and a horizontal top and bottom, which helps to slow down and disperse the top water flow, increase the contact area, prolong the contact time, and facilitate bottom recovery.

[0023] 5. The supporting wall of the solar salt pond self-heating system for desalinating concentrated brine of the present invention provides support for the overall equipment frame and is reinforced by means of inclined-stayed components, which facilitates the structure of the water inlet pipeline. During use, the front fresh water evaporation collection membrane and the side fresh water evaporation collection membrane correspond to the direction of sunlight irradiation, and reasonable control is implemented through the line limit tube and the line installation hole, so the overall line installation safety factor is high.

[0024] 6. The method for desalinating concentrated brine of the solar salt pond self-heating system for desalinating concentrated brine of the present invention can implement efficient desalination operations of concentrated brine under different working conditions, thereby increasing the scope of use of the product, overcoming the drawbacks of traditional distillation and purification of brine, and being able to implement uninterrupted desalination processing operations under a variety of working conditions. It is efficient and convenient and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0026] Figure 2 It is a rear structural schematic diagram of the present invention.

[0027] Figure 3 It is one of the side structural schematic diagrams of the present invention.

[0028] Figure 4 This is the second schematic diagram of the side structure of the present invention.

[0029] Figure 5 It is a partial top view of the structure of the present invention.

[0030] Figure 6It is a schematic diagram of the local three-dimensional structure of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the following description of the invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships, are based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. The term "connection" only indicates the connection between devices and has no special meaning.

[0033] Example 1: Figure 1 , 2 As shown in Figures 3, 4, 5 and 6, when the solar radiation intensity reaches the preset requirement, a solar salt pool self-heating system for desalinating concentrated salt water comprises a concentrated salt water pool 5, a front fresh water evaporation collection membrane 4 obliquely arranged on the upper part of the concentrated salt water pool 5, a support wall 1 connected to the top of the front fresh water evaporation collection membrane 4 is also arranged on the upper part of the concentrated salt water pool 5, a solar radiation heating evaporation wall is arranged on the inner side of the support wall 1, a concentrated salt water spray pipe 11 is arranged on the top surface of the solar radiation heating evaporation wall, the bottom of the solar radiation heating evaporation wall matches the top surface of the concentrated salt water pool 5, and a fresh water collection channel 22 is connected to the bottom of the fresh water collection membrane 4. The solar radiation heating evaporation wall is composed of a top surface, a bottom surface, a front side surface 13 and two oblique side surfaces 14, the front side surface 13 and the two oblique side surfaces 14 are all trapezoidal plate structures, and the angles between the front side surface 13 and the two oblique side surfaces 14 and the horizontal plane are not less than 60 degrees, and a sewage pipe 15 is arranged at the bottom of the concentrated salt water pool 5. The front side surface 13 and the two oblique side surfaces 14 include an inner thermal insulation layer, a solar radiation heat absorption layer is arranged on the front side of the inner thermal insulation layer, a heat absorption coating is evenly sprayed on the solar radiation heat absorption layer, and a heat-resistant, light-transmitting, heat-conductive protective layer is arranged on the outside of the heat absorption coating. A spray port 12 that matches the front side surface 13 and the top of the two oblique side surfaces 14 is arranged at the bottom of the concentrated brine spray pipe 11, and the supporting wall 1 is connected to the inner thermal insulation layer arranged on the front side surface 13 through a third connecting cross bar 21.

[0034] Specifically, the concentrated brine pool 5 adopts a sunken structure, and a front fresh water evaporation collection membrane 4 is arranged on its upper part facing the sunlight exposure position. The front fresh water evaporation collection membrane 4 is made of a light-transmitting material, and sunlight can penetrate and irradiate on the solar radiation heating evaporation wall. The supporting wall 1 is the installation surface of the solar radiation heating evaporation wall. The top surface, bottom surface, front side surface 13 and two inclined side surfaces 14 are installed on the inner wall of the supporting wall 1. The overall width and span of the solar radiation heating evaporation wall need to meet the acceptance requirements of the concentrated brine pool 5. At the same time, the angle between the front side surface 13 and the two inclined side surfaces 14 and the horizontal plane is 60 degrees to 75 degrees. During specific installation, the angle between the front fresh water evaporation collection membrane 4 and the horizontal plane is set to 45 degrees.

[0035] During specific operation, the front side surface 13 and the two oblique side surfaces 14 absorb sunlight and convert it into heat energy to generate heat. After reaching the preset temperature, the concentrated brine is sprayed to the top of the front side surface 13 and the two oblique side surfaces 14 through the spray port 12 set at the bottom of the concentrated brine spray pipe 11 and flows downward. During the flow process, the heat energy on the surface of the front side surface 13 and the two oblique side surfaces 14 is absorbed by the concentrated brine, and the fresh water component in the concentrated brine is gradually evaporated to form water vapor. The water vapor is condensed by the front side fresh water evaporation collection membrane 4 and collected in the fresh water collection channel 22. The remaining concentrated brine is finally recovered to the concentrated brine pool 5 through the bottom of the front side surface 13 and the two oblique side surfaces 14.

[0036] Example 2: When the solar radiation intensity does not meet the preset requirement, Figure 1 , 2 As shown in Figures 3, 4, 5 and 6, a solar salt pond self-heating system for desalinating brine comprises a brine pond 5, a front fresh water evaporation collection membrane 4 obliquely arranged on the upper part of the brine pond 5, an adaptive heating evaporation frame 6 is arranged in the brine pond 5, and a fresh water collection channel 22 is connected to the bottom of the fresh water collection membrane 4.

[0037] A transverse support platform 2 is arranged on the top of the support wall 1, a front oblique support rod 3 is arranged on the front side of the transverse support platform 2, a front fresh water evaporation collection membrane 4 is arranged on the inner side of the front oblique support rod 3, and a rear oblique support rod 16 is arranged on the rear side of the transverse support platform 2. Side fresh water evaporation collection membranes 20 are arranged between the support wall 1 and both sides of the front fresh water evaporation collection membrane 4, and an auxiliary collection channel 23 connected to the fresh water collection channel 22 is arranged at the bottom of the side fresh water evaporation collection membrane 20. A heating pipe 24 is arranged on the inner side of the adaptive heating evaporation frame 6, and the top of the adaptive heating evaporation frame 6 is fixedly connected to the bottom output end of the vertical lifting rod 10, and the vertical lifting rod 10 is installed on the upper part of the concentrated brine pool 5 through the bracket 9.

[0038] Specifically, the lateral support platform 2 provides a top connection for the installation of the front oblique support rod 3 and the rear oblique support rod 16, and fixes the support wall 1 to the two, forming a stable support structure on the upper part of the concentrated brine pool 5. The bottom of the side fresh water evaporation collection membrane 20 is provided with a mutually coordinated auxiliary collection channel 23. During the steam condensation process, the fresh water is efficiently collected by recovering the front and both sides at the same time, avoiding the reduction of the recovery efficiency caused by the moderately high internal space.

[0039] Specifically, the adaptive heating evaporation frame 6 is an automatic heating component of the system, which adopts a lifting method to match the liquid level of the concentrated brine in the concentrated brine pool 5. During operation, a liquid level meter is installed in the concentrated brine pool 5 to monitor the liquid level of the concentrated brine. The monitoring data is fed back to the controller 25 in real time, and the controller 25 drives the vertical lifting rod 10 to perform the telescopic operation. The heating pipe 24 inside it always matches the liquid level of the concentrated brine during the heating operation to implement efficient fresh water partial steaming treatment.

[0040] A line limit tube 7 is provided on the top of the adaptive heating evaporation frame 6, and a line installation hole 8 matching the line limit tube 7 is opened on the supporting wall 1. The heating tube 24 is connected to a controller 25 arranged on the outside of the supporting wall 1 through a wire installed in the line limit tube 7 and the line installation hole 8.

[0041] Specifically, during the lifting and lowering process of the adaptive heating evaporation frame 6, the system line connection part adopts a hidden layout to avoid the erosion of concentrated brine and the influence of high temperature. The line limit tube 7 is used in conjunction with the line installation hole 8 to avoid overflow of water vapor before condensation.

[0042] During specific operation, the concentrated brine is directly transported to the concentrated brine pool 5, the heating tube 24 is turned on, the heating temperature is controlled by the controller 25, and the vertical lifting rod 10 is started to drive the adaptive heating evaporation frame 6 to rise and fall, and the setting height of the heating tube 24 is made corresponding to the height of the concentrated brine liquid level. The fresh water component in the concentrated brine evaporates to form water vapor, and the water vapor is condensed by the front fresh water evaporation collection membrane 4 and collected in the fresh water collection channel 22.

[0043] Example 3: Figure 1 , 2As shown in Figures 3, 4, 5 and 6, a solar salt pond self-heating system for desalinating concentrated salt water comprises a concentrated salt water pond 5, a front fresh water evaporation collection membrane 4 obliquely arranged on the upper part of the concentrated salt water pond 5, a support wall 1 connected to the top of the front fresh water evaporation collection membrane 4 is also arranged on the upper part of the concentrated salt water pond 5, a solar radiation heating evaporation wall is arranged on the inner side of the support wall 1, a concentrated salt water spray pipe 11 is arranged on the top surface of the solar radiation heating evaporation wall, the bottom of the solar radiation heating evaporation wall matches the top surface of the concentrated salt water pond 5, an adaptive heating evaporation frame 6 is arranged in the concentrated salt water pond 5, and a fresh water collection channel 22 is connected to the bottom of the fresh water collection membrane 4. The solar radiation heating evaporation wall is composed of a top surface, a bottom surface, a front side surface 13 and two oblique side surfaces 14, the front side surface 13 and the two oblique side surfaces 14 are all trapezoidal plate structures, and the angles between the front side surface 13 and the two oblique side surfaces 14 and the horizontal plane are not less than 60 degrees, and a sewage pipe 15 is arranged at the bottom of the concentrated salt water pond 5. The front side surface 13 and the two oblique side surfaces 14 include an inner thermal insulation layer, a solar radiation heat absorption layer is arranged on the front side of the inner thermal insulation layer, a heat absorption coating is evenly sprayed on the solar radiation heat absorption layer, and a heat-resistant, light-transmitting, heat-conductive protective layer is arranged on the outside of the heat absorption coating. A spray port 12 that matches the front side surface 13 and the top of the two oblique side surfaces 14 is arranged at the bottom of the concentrated brine spray pipe 11, and the supporting wall 1 is connected to the inner thermal insulation layer arranged on the front side surface 13 through a third connecting cross bar 21.

[0044] A transverse support platform 2 is arranged on the top of the support wall 1, a front oblique support rod 3 is arranged on the front side of the transverse support platform 2, a front fresh water evaporation collection membrane 4 is arranged on the inner side of the front oblique support rod 3, a rear oblique support rod 16 is arranged on the rear side of the transverse support platform 2, and a concentrated brine delivery pipeline 18 connected to the concentrated brine spray pipe 11 is installed on the rear oblique support rod 16. A heating pipe 24 is arranged on the inner side of the adaptive heating evaporation frame 6, and the top of the adaptive heating evaporation frame 6 is fixedly connected to the bottom output end of the vertical lifting rod 10, and the vertical lifting rod 10 is installed on the upper part of the concentrated brine pool 5 through the bracket 9.

[0045] A line limit tube 7 is provided on the top of the adaptive heating evaporation frame 6, and a line installation hole 8 matching the line limit tube 7 is opened on the supporting wall 1. The heating tube 24 is connected to a controller 25 arranged on the outside of the supporting wall 1 through a wire installed in the line limit tube 7 and the line installation hole 8.

[0046] During specific operation, the front side surface 13 and the two oblique side surfaces 14 absorb sunlight and convert it into heat energy to generate heat. After reaching the preset temperature, the concentrated brine is sprayed to the top of the front side surface 13 and the two oblique side surfaces 14 through the spray port 12 set at the bottom of the concentrated brine spray pipe 11 and flows downward. During the flow process, the heat energy on the surface of the front side surface 13 and the two oblique side surfaces 14 is absorbed by the concentrated brine, and the fresh water component in the concentrated brine is gradually evaporated to form water vapor. The water vapor is condensed by the front side fresh water evaporation collection membrane 4 and collected in the fresh water collection channel 22. The remaining concentrated brine is finally recovered to the concentrated brine pool 5 through the bottom of the front side surface 13 and the two oblique side surfaces 14. At the same time, the concentrated brine recovered into the brine pool 5 continues to be treated with fresh water vaporization. The heating tube 24 is turned on, the heating temperature is controlled by the controller 25, and the vertical lifting rod 10 is started to drive the adaptive heating evaporation frame 6 to rise and fall. The setting height of the heating tube 24 is made to correspond to the height of the concentrated brine liquid level. The fresh water component in the concentrated brine evaporates to form water vapor, which is condensed by the front fresh water evaporation collection membrane 4 and collected in the fresh water collection channel 22.

[0047] As another embodiment of the present invention, the top width of the front side surface 13 is not greater than its bottom width, the bottom width of the front side surface 13 is not greater than the width of the concentrated brine pool 5, the top width of the oblique side surface 14 is not greater than its bottom width, and the bottom width of the oblique side surface 14 is not greater than one quarter of the length of the concentrated brine pool 5.

[0048] Specifically, the solar radiation heat absorption layer will convert light energy into heat energy after being exposed to sunlight. Under the action of the inner insulation layer, the heat is transferred from the solar radiation heat absorption layer to the heat-resistant, light-transmitting, heat-conducting protective layer. During specific operation, the temperature of the heat-resistant, light-transmitting, heat-conducting protective layer needs to be monitored by a temperature display control device. The spray port 12 at the bottom of the concentrated brine spray pipe 11 corresponds to the front side 13 and the top of the two inclined side surfaces 14. After the concentrated brine is discharged from the spray port 12, it is directly sprayed on the front side 13 and the top outer wall of the two inclined side surfaces 14, and flows toward the bottom under the action of its own weight. During the flow of the concentrated brine, the temperature of the solar radiation heat absorption layer is absorbed, and the fresh water part in the concentrated brine is converted into steam for volatilization, and part of the concentrated brine that has not been converted is collected through the concentrated brine pool 5.

[0049] As another embodiment of the present invention, a lateral support platform 2 is arranged on the top of the support wall 1, a front oblique support rod 3 is arranged on the front side of the lateral support platform 2, a front freshwater evaporation collection membrane 4 is arranged on the inner side of the front oblique support rod 3, a rear oblique support rod 16 is arranged on the rear side of the lateral support platform 2, and a concentrated brine delivery pipeline 18 connected to the concentrated brine spray pipe 11 is installed on the rear oblique support rod 16. Side freshwater evaporation collection membranes 20 are arranged between the support wall 1 and both sides of the front freshwater evaporation collection membrane 4, and an auxiliary collection channel 23 connected to the freshwater collection channel 22 is arranged at the bottom of the side freshwater evaporation collection membrane 20.

[0050] Specifically, the lateral support platform 2 provides a top connection for the installation of the front oblique support rod 3 and the rear oblique support rod 16, and fixes the support wall 1 to both, forming a stable support structure on the upper part of the concentrated brine pool 5. The concentrated brine delivery pipeline 18 is connected to the concentrated brine spray pipe 11 to carry the flow control and delivery operation of the concentrated brine. The bottom of the side fresh water evaporation collection membrane 20 is provided with an auxiliary collection channel 23 that cooperates with each other. During the steam condensation process, the fresh water is efficiently collected by recovering the front and both sides at the same time, avoiding the reduction of recovery efficiency caused by the moderately high internal space.

[0051] As another embodiment of the present invention, a first connecting cross bar 19 is arranged between the rear oblique support rod 16 and the supporting wall 1, a second connecting cross bar 17 is arranged between two adjacent rear oblique support rods 16, the supporting wall 1 is arranged on the top outer edge of the length direction of the concentrated brine pool 5 or on the bottom wall of the concentrated brine pool 5, the supporting wall 1 is perpendicular to the horizontal plane or inclined toward the rear oblique support rod 16, and the lateral support platform 2 is a plate-like structure parallel to the horizontal plane.

[0052] Specifically, the support wall 1 is arranged vertically or inclined, depending on the latitude of the installation location, and cooperates with the setting angles of the front side surface 13 and the two inclined side surfaces 14 to achieve the optimal sunlight receiving angle and area.

[0053] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A solar salt pond self-heating system for desalinating concentrated brine, comprising a concentrated brine pond (5), a front side fresh water evaporation collection membrane (4) obliquely arranged on the upper part of the concentrated brine pond (5), characterized in that: The upper part of the concentrated salt water pool (5) is also provided with a supporting wall (1) connected to the top of the front fresh water evaporation collection membrane (4); the inner side of the supporting wall (1) is provided with a solar radiation heating evaporation wall; the top surface of the solar radiation heating evaporation wall is provided with a concentrated salt water spray pipe (11); the bottom of the solar radiation heating evaporation wall is matched with the top surface of the concentrated salt water pool (5); an adaptive heating evaporation frame (6) is provided in the concentrated salt water pool (5); and a fresh water collection channel (22) is connected to the bottom of the fresh water collection membrane (4).

2. The solar salt pond self-heating system for desalinating concentrated brine according to claim 1 is characterized in that: The solar radiation heating evaporation wall is composed of a top surface, a bottom surface, a front side surface (13) and two oblique side surfaces (14); the front side surface (13) and the two oblique side surfaces (14) are both trapezoidal plate structures; the angles between the front side surface (13) and the two oblique side surfaces (14) and the horizontal plane are not less than 60 degrees; a sewage pipe (15) is provided at the bottom of the concentrated brine pool (5).

3. The solar salt pond self-heating system for desalinating concentrated brine according to claim 1 is characterized in that: A transverse support platform (2) is arranged on the top of the support wall (1), a front oblique support rod (3) is arranged on the front side of the transverse support platform (2), a front fresh water evaporation collection membrane (4) is arranged on the inner side of the front oblique support rod (3), a rear oblique support rod (16) is arranged on the rear side of the transverse support platform (2), and a concentrated brine delivery pipeline (18) connected to the concentrated brine spray pipe (11) is installed on the rear oblique support rod (16).

4. The solar salt pond self-heating system for desalinating concentrated brine according to claim 1 is characterized in that: Side fresh water evaporation collection membranes (20) are arranged between the support wall (1) and both sides of the front fresh water evaporation collection membrane (4), and auxiliary collection channels (23) connected to the fresh water collection channel (22) are arranged at the bottom of the side fresh water evaporation collection membrane (20).

5. The solar salt pond self-heating system for desalinating concentrated brine according to claim 1 is characterized in that: A heating tube (24) is arranged inside the adaptive heating evaporation frame (6), and the top of the adaptive heating evaporation frame (6) is fixedly connected to the bottom output end of the vertical lifting rod (10), and the vertical lifting rod (10) is installed on the upper part of the concentrated brine pool (5) through a bracket (9).

6. The solar salt pond self-heating system for desalinating concentrated brine according to claim 2 is characterized in that: The front side surface (13) and the two oblique side surfaces (14) both include an inner thermal insulation layer, a solar radiation heat absorption layer is arranged on the front side of the inner thermal insulation layer, a heat absorption coating is evenly sprayed on the solar radiation heat absorption layer, and a heat-resistant, light-transmitting, heat-conductive protective layer is arranged on the outer side of the heat absorption coating. A spray port (12) matching the top of the front side surface (13) and the two oblique side surfaces (14) is arranged at the bottom of the concentrated brine spray pipe (11), and the supporting wall (1) is connected to the inner thermal insulation layer arranged on the front side surface (13) through a third connecting cross bar (21).

7. The solar salt pond self-heating system for desalinating concentrated brine according to claim 2 is characterized in that: The top width of the front side surface (13) is not greater than its bottom width, the bottom width of the front side surface (13) is not greater than the width of the concentrated brine pool (5), the top width of the oblique side surface (14) is not greater than its bottom width, and the bottom width of the oblique side surface (14) is not greater than one quarter of the length of the concentrated brine pool (5).

8. The solar salt pond self-heating system for desalinating concentrated brine according to claim 3 is characterized by: A first connecting cross bar (19) is arranged between the rear oblique support rod (16) and the supporting wall (1), and a second connecting cross bar (17) is arranged between two adjacent rear oblique support rods (16). The supporting wall (1) is arranged on the top outer edge of the concentrated brine pool (5) in the length direction or on the bottom wall of the concentrated brine pool (5). The supporting wall (1) is perpendicular to the horizontal plane or inclined toward the rear oblique support rod (16), and the transverse supporting platform (2) is a plate-like structure parallel to the horizontal plane.

9. The solar salt pond self-heating system for desalinating concentrated brine according to claim 5, characterized in that: A line limit tube (7) is arranged on the top of the adaptive heating evaporation frame (6), a line installation hole (8) matching the line limit tube (7) is opened on the supporting wall (1), and the heating tube (24) is connected to a controller (25) arranged on the outside of the supporting wall (1) via a wire installed in the line limit tube (7) and the line installation hole (8).

10. A method for desalinating concentrated brine using a solar salt pond self-heating system, characterized in that: The method is: When the solar radiation intensity reaches the preset requirement, the front side (13) and the two oblique side (14) absorb sunlight and convert it into heat energy to generate heat. After reaching the preset temperature, the concentrated brine is sprayed to the top of the front side (13) and the two oblique side (14) through the spray port (12) arranged at the bottom of the concentrated brine spray pipe (11) and flows downward. During the flow, the heat energy on the surface of the front side (13) and the two oblique side (14) is absorbed by the concentrated brine, and the fresh water component in the concentrated brine gradually evaporates to form water vapor. The water vapor is condensed by the front side fresh water evaporation collection membrane (4) and collected in the fresh water collection channel (22). The remaining concentrated brine is finally recovered to the concentrated brine pool (5) through the bottom of the front side (13) and the two oblique side (14); Alternatively, when the solar radiation intensity does not reach the preset requirement, the concentrated brine is directly transported to the concentrated brine pool (5), the heating tube (24) is turned on, the heating temperature is controlled by the controller (25), and the vertical lifting rod (10) is started to drive the adaptive heating evaporation frame (6) to rise and fall, and the setting height of the heating tube (24) is made to correspond to the height of the concentrated brine liquid level. The fresh water component in the concentrated brine evaporates to form water vapor, and the water vapor is condensed by the front fresh water evaporation collection membrane (4) and collected in the fresh water collection channel (22).

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