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

Abstract

The application relates to a solar salt pond self-heating system and method for desalting concentrated brine, wherein a support wall is further arranged on the upper portion of the concentrated brine pond and connected with the top of a front-side fresh water evaporation collection film; a solar radiation heating evaporation wall is arranged on the inner side of the support wall; a concentrated brine spraying 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; a self-adaptive heating evaporation frame is arranged in the concentrated brine pond; and a fresh water collection channel is arranged on the bottom of the fresh water collection film; the concentrated brine is subjected to fresh water vaporization treatment after absorbing solar energy and converting the solar energy into heat energy by the evaporation wall, and then the fresh water resource is recovered after condensation; the evaporation wall adopts a unique multi-trapezoidal surface structure, and the concentrated brine is subjected to shunting and dispersion treatment in the process of flowing from top to bottom, the contact area between the concentrated brine and the outer surface of the evaporation wall is large in the process of flowing downward, the concentrated brine is helpful to rapid evaporation, and the desalination efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of water treatment, specifically to a solar-powered self-heating system and method for desalinating concentrated brine. Background Technology

[0002] Concentrated brine refers to water with a high concentration of salts. Its main characteristics include a high concentration of soluble salts, such as sodium chloride and sodium carbonate. Concentrated brine is unsuitable for drinking or agricultural irrigation. The formation of concentrated brine is closely related to geographical environment and climatic conditions. Although the chemical composition of concentrated brine is complex, with appropriate improvement and treatment, it can be used for aquaculture, irrigation, and other purposes. Significant ecological, economic, and social benefits can be achieved through desalination and other treatment and development methods.

[0003] There are various methods for treating concentrated brine, among which solar desalination technology is widely used due to its low cost and clean energy. Compared with traditional power and heat sources, solar energy has advantages such as safety and environmental friendliness. Combining solar energy collection with desalination processes is a sustainable brine desalination technology. It has gradually gained attention due to its advantages of not consuming conventional energy, being pollution-free, and producing high-purity freshwater. It utilizes the heat generated by solar energy to evaporate concentrated brine in a brine pool, and collects the water vapor using a steam-collecting film installed above, thus separating and collecting the freshwater. However, in practical applications, many factors affect solar distillation desalination. First, solar radiation is the main heat source for the solar distillation system. Radiation intensity directly affects the system's water production and efficiency. Higher radiation intensity results in higher distillation efficiency and a corresponding increase in water production. When solar radiation intensity is low, the desalination efficiency decreases. Second, ambient temperature has a significant impact on the distillation process. Higher ambient temperatures accelerate the evaporation rate of water vapor, thereby increasing water production and efficiency. When the external ambient temperature decreases, the desalination efficiency decreases. Furthermore, in a lower humidity environment, water vapor condenses more easily into liquid water, thus increasing water production and efficiency. If the humidity in the enclosed space above the brine pond is high, it will affect desalination efficiency.

[0004] To address the aforementioned problems, this invention provides a solar-powered 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 excessively high humidity during the desalination process. Summary of the Invention

[0005] This invention provides a solar-powered salt pond self-heating system and method for desalinating concentrated brine. This system is simple in structure, easy to operate, has high carbonization efficiency, can compensate for the deficiency of low solar radiation intensity, provides self-heating desalination effect, effectively solves the problems of high humidity and low desalination efficiency after temperature drop, and achieves efficient desalination operation. The method is simple and easy to operate, thus overcoming the defects in the prior art.

[0006] The technical solution of the present invention is implemented as follows: a solar-powered self-heating system for desalinating concentrated brine includes a concentrated brine pool, a front freshwater evaporation and collection membrane inclinedly arranged on the upper part of the concentrated brine pool, a support wall connected to the top of the front freshwater evaporation and collection membrane on the upper part of the concentrated brine pool, a solar radiation heating evaporation wall arranged on the inner side of the support wall, a concentrated brine spray pipe arranged on the top surface of the solar radiation heating evaporation wall, the bottom of the solar radiation heating evaporation wall cooperating with the top surface of the concentrated brine pool, an adaptive heating evaporation frame arranged in the concentrated brine pool, and a freshwater collection channel connected to the bottom of the freshwater collection membrane.

[0007] Furthermore, the solar radiation heating evaporation wall consists of a top surface, a bottom surface, a front side surface, and two inclined sides. The front side surface and the two inclined sides are trapezoidal plate structures, and the angle between the front side surface and the two inclined sides and the horizontal plane is not less than 60 degrees. A sewage pipe is installed at the bottom of the concentrated brine tank.

[0008] Furthermore, a transverse support platform is provided at the top of the support wall, a front inclined support rod is provided on the front side of the transverse support platform, a front freshwater evaporation collection membrane is provided on the inner side of the front inclined support rod, a rear inclined support rod is provided on the rear side of the transverse support platform, and a concentrated brine conveying pipe connected to the concentrated brine spray pipe is installed on the rear inclined support rod.

[0009] Furthermore, a side freshwater evaporation collection membrane is provided between the supporting wall and both sides of the front freshwater evaporation collection membrane, and an auxiliary collection channel connected to the freshwater collection channel is provided at the bottom of the side freshwater evaporation collection membrane.

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

[0011] Furthermore, the front side and the two inclined sides each include an inner insulation layer. A solar radiation heat-absorbing layer is provided on the front side of the inner insulation layer. A heat-absorbing coating is uniformly sprayed on the solar radiation heat-absorbing layer. A heat-resistant, light-transmitting, and heat-conducting protective layer is provided on the outside of the heat-absorbing coating. The bottom of the concentrated brine spray pipe is provided with a spray nozzle that matches the top of the front side and the two inclined sides. The supporting wall is connected to the inner insulation layer provided on the front side through a third connecting crossbar.

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

[0013] Furthermore, a first connecting crossbar is provided between the rear diagonal support rod and the support wall, and a second connecting crossbar is provided between two adjacent rear diagonal support rods. The support wall is set on the top outer edge of the concentrated brine tank along its length or on the bottom wall of the concentrated brine tank. The support wall is perpendicular to the horizontal plane or inclined towards the rear diagonal support rod. The transverse support platform is a plate-shaped structure parallel to the horizontal plane.

[0014] Furthermore, the top of the adaptive heating evaporation frame is provided with a line limiting tube, and a line mounting hole that matches the line limiting tube is opened on the support wall. The heating tube is connected to the controller located on the outside of the support wall through a wire installed in the line limiting tube and the line mounting hole.

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

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

[0017] Alternatively, when the solar radiation intensity does not meet the preset requirements, the concentrated brine is directly transported to the concentrated brine tank, the heating tube is turned on, the heating temperature is controlled by the controller, and the vertical lifting rod is activated to drive the adaptive heating evaporation frame to rise and fall, so that the set height of the heating tube corresponds to the height of the concentrated brine liquid level. After the fresh water component in the concentrated brine evaporates, it forms water vapor, which is condensed by the fresh water evaporation collection membrane on the front side and collected into the fresh water collection channel.

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

[0019] 1. The invention of a solar-powered self-heating salt pond system for desalination of concentrated brine utilizes clean solar energy to desalinate concentrated brine. The system absorbs solar energy through the evaporation wall and converts it into heat energy to vaporize the concentrated brine. The brine is then condensed and the freshwater is recovered. The evaporation wall adopts a unique multi-trapezoidal surface structure, which performs diversion and dispersion treatment as the concentrated brine flows from top to bottom. During the downward flow, the concentrated brine has a large contact area with the outer surface of the evaporation wall, which helps to evaporate quickly and improves the desalination efficiency.

[0020] 2. The invention of a solar-powered self-heating system for desalination of concentrated brine can activate the heating tubes to heat and evaporate the concentrated brine in the pool when the solar radiation intensity is low or the temperature is low. Through adaptive height adjustment, the effective heating surface of the heating tubes is always matched with the liquid level of the concentrated brine, thereby improving the efficiency of heat utilization and desalination.

[0021] 3. The evaporation wall of the solar salt pond self-heating system for desalinating concentrated brine has a multi-layer design structure. The bottom layer is an insulation layer, and the outer layer is a transparent, heat-resistant, light-transmitting, and heat-conducting protective layer. This facilitates the conduction of heat to the outer layer, which is then absorbed by the concentrated brine for desalination and evaporation. At the same time, it has high photothermal energy conversion efficiency and the surface is easy to clean, which is beneficial for maintenance operations.

[0022] 4. The solar radiation heating evaporation wall of the solar salt pond self-heating system for desalinating concentrated brine is set at an inclined angle on the front and both sides, while the top and bottom are set horizontally. This helps to slow down and disperse the water flow at the top, increase the contact area, prolong the contact time, and facilitate the bottom recovery.

[0023] 5. The supporting wall of the solar salt pond self-heating system for desalination of concentrated brine of the present invention provides support for the overall equipment frame and is reinforced by diagonal bracing components. At the same time, it facilitates the structure of the water inlet pipeline. During use, the front and side freshwater evaporation collection membranes are aligned with the direction of sunlight. Reasonable layout is achieved through line limiting pipes and line installation holes, resulting in a high safety factor for the overall line installation.

[0024] 6. The method of the solar-powered salt pond self-heating system for desalinating concentrated brine of the present invention can carry out efficient desalination of concentrated brine under different working conditions, which improves the application range of the product, overcomes the drawbacks of traditional distillation and purification of brine, and can carry out uninterrupted desalination operations under various working conditions. It is efficient, convenient and suitable for widespread promotion and use. Attached Figure Description

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

[0026] Figure 2 This is a schematic diagram of the rear view structure of the present invention.

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

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

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

[0030] Figure 6This is a partial three-dimensional structural diagram of the present invention. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort 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," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. The term "connection" simply indicates a connection between devices and has no special meaning.

[0033] Example 1: As Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, when the solar radiation intensity reaches the preset requirement, a solar-powered self-heating system for desalinating concentrated brine includes a concentrated brine tank 5, a front freshwater evaporation collection membrane 4 inclinedly disposed on the upper part of the concentrated brine tank 5, a support wall 1 connected to the top of the front freshwater evaporation collection membrane 4 on the upper part of the concentrated brine tank 5, a solar radiation heating evaporation wall disposed on the inner side of the support wall 1, a concentrated brine spray pipe 11 disposed on the top surface of the solar radiation heating evaporation wall, and a freshwater collection channel 22 connected to the bottom of the freshwater collection membrane 4. The solar radiation heating evaporation wall consists of a top surface, a bottom surface, a front side 13, and two inclined sides 14. The front side 13 and the two inclined sides 14 are trapezoidal plate structures, and the angle between the front side 13 and the two inclined sides 14 and the horizontal plane is not less than 60 degrees. A drain pipe 15 is disposed at the bottom of the concentrated brine tank 5. The front side 13 and the two inclined sides 14 each include an inner insulation layer. A solar radiation heat absorption layer is provided on the front side of the inner insulation layer. A heat absorption coating is uniformly sprayed on the solar radiation heat absorption layer. A heat-resistant, light-transmitting, and heat-conducting protective layer is provided on the outside of the heat absorption coating. The bottom of the concentrated brine spray pipe 11 is provided with a spray nozzle 12 that matches the top of the front side 13 and the two inclined sides 14. The support wall 1 is connected to the inner insulation layer provided on the front side 13 through a third connecting crossbar 21.

[0034] Specifically, the concentrated brine tank 5 adopts a sunken structure, with a front freshwater evaporation collection membrane 4 installed on its upper part facing the sunlight. The front freshwater evaporation collection membrane 4 is made of a light-transmitting material, allowing sunlight to penetrate and irradiate the solar radiation heating evaporation wall. The support wall 1 is the mounting surface for the solar radiation heating evaporation wall. The top surface, bottom surface, front side 13, and two inclined side 14 are installed on the inner wall of the support wall 1. The overall width and span of the solar radiation heating evaporation wall must meet the support requirements of the concentrated brine tank 5. At the same time, the angle between the front side 13 and the two inclined side 14 and the horizontal plane is 60 degrees to 75 degrees. Specifically, during installation, the angle between the front freshwater evaporation collection membrane 4 and the horizontal plane is set to 45 degrees.

[0035] During actual operation, the front side 13 and the two inclined sides 14 absorb sunlight and convert it into heat energy to generate heat. After reaching the preset temperature, the concentrated brine is sprayed through the spray nozzle 12 at the bottom of the concentrated brine spray pipe 11 onto the top of the front side 13 and the two inclined sides 14 and flows downward. During the flow, the heat energy on the surface of the front side 13 and the two inclined sides 14 is absorbed by the concentrated brine. 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 4 on the front side and collected into the fresh water collection channel 22. The remaining concentrated brine is finally recycled to the concentrated brine pool 5 through the bottom of the front side 13 and the two inclined sides 14.

[0036] Example 2: When the solar radiation intensity does not meet the preset requirements, such as Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, a solar-powered salt pond self-heating system for desalinating concentrated brine includes a concentrated brine pond 5, a front freshwater evaporation and collection membrane 4 inclinedly disposed on the upper part of the concentrated brine pond 5, an adaptive heating evaporation frame 6 disposed inside the concentrated brine pond 5, and a freshwater collection channel 22 receiving the freshwater collection membrane 4 at its bottom.

[0037] A horizontal support platform 2 is provided at the top of the supporting wall 1. A front inclined support rod 3 is provided at the front of the horizontal support platform 2. A front freshwater evaporation collection membrane 4 is provided inside the front inclined support rod 3. A rear inclined support rod 16 is provided at the rear of the horizontal support platform 2. A side freshwater evaporation collection membrane 20 is provided between the supporting wall 1 and both sides of the front freshwater evaporation collection membrane 4. An auxiliary collection channel 23 connected to the freshwater collection channel 22 is provided at the bottom of the side freshwater evaporation collection membrane 20. A heating pipe 24 is provided inside the adaptive heating evaporation frame 6. The top of the adaptive heating evaporation frame 6 is fixedly connected to the bottom output end of the vertical lifting rod 10. The vertical lifting rod 10 is installed on the upper part of the concentrated brine tank 5 through a bracket 9.

[0038] Specifically, the transverse support platform 2 provides a top connection for the installation of the front inclined support rod 3 and the rear inclined support rod 16, while simultaneously fixing the support wall 1 to both, forming a stable support structure above the concentrated brine tank 5. The bottom of the side freshwater evaporation collection membrane 20 is equipped with complementary auxiliary collection channels 23. During steam condensation, freshwater is efficiently collected through simultaneous front and side recovery, avoiding a decrease in recovery efficiency caused by excessively high internal space.

[0039] Specifically, the adaptive heating evaporation frame 6 is the automatic heating component of this system. It adopts a lifting mechanism to coordinate with the liquid level of the concentrated brine in the concentrated brine tank 5. During operation, a level gauge is installed in the concentrated brine tank 5 to monitor the liquid level. The monitoring data is fed back to the controller 25 in real time, and the controller 25 drives the vertical lifting rod 10 to extend and retract. During the heating operation, the heating tube 24 inside it always coordinates with the concentrated brine liquid level to achieve efficient partial steaming of the freshwater.

[0040] The adaptive heating evaporation frame 6 is provided with a line limiting tube 7 at its top, and a line mounting hole 8 that cooperates with the line limiting tube 7 is provided on the support wall 1. The heating tube 24 is connected to the controller 25 located on the outside of the support wall 1 through the wire installed in the line limiting tube 7 and the line mounting hole 8.

[0041] Specifically, during the lifting and lowering of the adaptive heating evaporator frame 6, the system wiring connection is arranged in a concealed manner to avoid the corrosion of concentrated brine and the effects of high temperature. The wiring limit tube 7 is used in conjunction with the wiring mounting hole 8 to prevent water vapor from overflowing before condensation.

[0042] In actual operation, the concentrated brine is directly transported to the concentrated brine tank 5, the heating tube 24 is turned on, the heating temperature is controlled by the controller 25, and the vertical lifting rod 10 is activated to drive the adaptive heating evaporation frame 6 to rise and fall, so that the set height of the heating tube 24 corresponds to the height of the concentrated brine liquid level. After the fresh water component in the concentrated brine evaporates, it forms water vapor. The water vapor is condensed by the front fresh water evaporation collection membrane 4 and collected into the fresh water collection channel 22.

[0043] Example 3: As Figure 1 , 2As shown in Figures 3, 4, 5, and 6, a solar-powered self-heating system for desalinating concentrated brine includes a concentrated brine tank 5, a front freshwater evaporation collection membrane 4 inclinedly disposed on the upper part of the concentrated brine tank 5, a support wall 1 connected to the top of the front freshwater evaporation collection membrane 4 on the upper part of the concentrated brine tank 5, a solar radiation heating evaporation wall disposed on the inner side of the support wall 1, a concentrated brine spray pipe 11 disposed on the top surface of the solar radiation heating evaporation wall, and the bottom of the solar radiation heating evaporation wall engaging with the top surface of the concentrated brine tank 5. An adaptive heating evaporation frame 6 is disposed within the concentrated brine tank 5, and a freshwater collection channel 22 is connected to the bottom of the freshwater collection membrane 4. The solar radiation heating evaporation wall consists of a top surface, a bottom surface, a front side surface 13, and two inclined side surfaces 14. The front side surface 13 and the two inclined side surfaces 14 are all trapezoidal plate structures, and the angle between the front side surface 13 and the two inclined side surfaces 14 and the horizontal plane is not less than 60 degrees. A drain pipe 15 is disposed at the bottom of the concentrated brine tank 5. The front side 13 and the two inclined sides 14 each include an inner insulation layer. A solar radiation heat absorption layer is provided on the front side of the inner insulation layer. A heat absorption coating is uniformly sprayed on the solar radiation heat absorption layer. A heat-resistant, light-transmitting, and heat-conducting protective layer is provided on the outside of the heat absorption coating. The bottom of the concentrated brine spray pipe 11 is provided with a spray nozzle 12 that matches the top of the front side 13 and the two inclined sides 14. The support wall 1 is connected to the inner insulation layer provided on the front side 13 through a third connecting crossbar 21.

[0044] A horizontal support platform 2 is provided at the top of the support wall 1. A front inclined support rod 3 is provided on the front side of the horizontal support platform 2. A front freshwater evaporation collection membrane 4 is provided inside the front inclined support rod 3. A rear inclined support rod 16 is provided on the rear side of the horizontal support platform 2. A concentrated brine delivery pipe 18 connected to the concentrated brine spray pipe 11 is installed on the rear inclined support rod 16. A heating pipe 24 is provided inside the adaptive heating evaporation frame 6. The top of the adaptive heating evaporation frame 6 is fixedly connected to the bottom output end of the vertical lifting rod 10. The vertical lifting rod 10 is installed on the upper part of the concentrated brine tank 5 through the bracket 9.

[0045] The adaptive heating evaporation frame 6 is provided with a line limiting tube 7 at its top, and a line mounting hole 8 that cooperates with the line limiting tube 7 is provided on the support wall 1. The heating tube 24 is connected to the controller 25 located on the outside of the support wall 1 through the wire installed in the line limiting tube 7 and the line mounting hole 8.

[0046] During actual operation, the front side 13 and the two inclined sides 14 absorb sunlight and convert it into heat energy to generate heat. After reaching the preset temperature, the concentrated brine is sprayed through the spray nozzle 12 at the bottom of the concentrated brine spray pipe 11 onto the top of the front side 13 and the two inclined sides 14 and flows downward. During the flow, the heat energy on the surface of the front side 13 and the two inclined sides 14 is absorbed by the concentrated brine. 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 4 on the front side and collected into the fresh water collection channel 22. The remaining concentrated brine is finally recycled to the concentrated brine pool 5 through the bottom of the front side 13 and the two inclined sides 14. Meanwhile, the concentrated brine recovered to the concentrated brine tank 5 continues to undergo freshwater steam treatment. The heating tube 24 is turned on, the heating temperature is controlled by the controller 25, and the vertical lifting rod 10 is activated to drive the adaptive heating evaporation frame 6 to rise and fall, so that the setting height of the heating tube 24 corresponds to the height of the concentrated brine liquid level. After the freshwater component in the concentrated brine evaporates, it forms water vapor. The water vapor is condensed by the front freshwater evaporation collection membrane 4 and collected into the freshwater collection channel 22.

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

[0048] Specifically, the solar radiation heat-absorbing layer converts sunlight into heat energy upon receiving it. With the help of the inner insulation layer, the heat is transferred from the solar radiation heat-absorbing layer to the heat-resistant, light-transmitting, and thermally conductive protective layer. During operation, the temperature of the heat-resistant, light-transmitting, and thermally conductive protective layer needs to be monitored using a temperature display and control device. The spray nozzle 12 at the bottom of the concentrated brine spray pipe 11 corresponds to the top of the front side 13 and the two inclined sides 14. After the concentrated brine exits from the spray nozzle 12, it is sprayed directly onto the top outer wall of the front side 13 and the two inclined sides 14, and flows downwards under its own weight. During the flow of the concentrated brine, the temperature of the solar radiation heat-absorbing layer is absorbed, converting the fresh water portion of the concentrated brine into vapor, which evaporates. The remaining unconverted concentrated brine is collected through the concentrated brine pool 5.

[0049] In another embodiment of the present invention, a transverse support platform 2 is provided at the top of the support wall 1, a front inclined support rod 3 is provided at the front side of the transverse support platform 2, a front freshwater evaporation collection membrane 4 is provided inside the front inclined support rod 3, and a rear inclined support rod 16 is provided at the rear side of the transverse support platform 2. A concentrated brine delivery pipe 18 connected to the concentrated brine spray pipe 11 is installed on the rear inclined support rod 16. A side freshwater evaporation collection membrane 20 is provided 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 provided at the bottom of the side freshwater evaporation collection membrane 20.

[0050] Specifically, the transverse support platform 2 provides a top connection for the installation of the front diagonal support rod 3 and the rear diagonal support rod 16, and simultaneously fixes the support wall 1 to both, forming a stable support structure above the concentrated brine tank 5. The concentrated brine conveying pipe 18 is connected to the concentrated brine spray pipe 11, carrying out the flow control and conveying operation of the concentrated brine. The bottom of the side freshwater evaporation collection membrane 20 is provided with an auxiliary collection channel 23 that works in conjunction with it. During the steam condensation process, the freshwater is efficiently collected through simultaneous recovery from the front and both sides, avoiding a decrease in recovery efficiency caused by excessive internal space.

[0051] In another embodiment of the present invention, a first connecting crossbar 19 is provided between the rear inclined support rod 16 and the support wall 1, and a second connecting crossbar 17 is provided between two adjacent rear inclined support rods 16. The support wall 1 is provided on the top outer edge of the concentrated brine tank 5 in the length direction or on the bottom wall of the concentrated brine tank 5. The support wall 1 is perpendicular to the horizontal plane or inclined towards the rear inclined support rod 16. The transverse support platform 2 is a plate structure parallel to the horizontal plane.

[0052] Specifically, the support wall 1 is set to be vertical or inclined, depending on the latitude of the setting location. Combined with the setting angle of the front side 13 and the two inclined sides 14, the optimal angle and area of ​​sunlight reception are achieved.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A solar-powered self-heating system for desalinating concentrated brine, comprising a concentrated brine tank (5) and a freshwater evaporation collection membrane (4) inclinedly disposed on the front side of the concentrated brine tank (5), characterized in that: The upper part of the concentrated brine tank (5) is also provided with a support wall (1) that is connected to the top of the front freshwater evaporation collection membrane (4). The inner side of the support 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 brine spray pipe (11). The bottom of the solar radiation heating evaporation wall is matched with the top surface of the concentrated brine tank (5). An adaptive heating evaporation frame (6) is provided in the concentrated brine tank (5). A freshwater collection channel (22) is connected to the bottom of the front freshwater evaporation collection membrane (4). The solar radiation heating evaporation wall consists of a top surface, a bottom surface, and a front surface. It consists of a side (13) and two oblique side (14). The front side (13) and the two oblique side (14) are trapezoidal plate structures. The angle between the front side (13) and the two oblique side (14) and the horizontal plane is not less than 60 degrees. A sewage pipe (15) is provided at the bottom of the concentrated brine tank (5). A heating pipe (24) is provided inside the adaptive heating evaporation frame (6). The top of the adaptive heating evaporation frame (6) is fixedly connected to the bottom output end of the vertical lifting rod (10). The vertical lifting rod (10) is installed on the upper part of the concentrated brine tank (5) through the bracket (9).

2. The solar-powered self-heating system for desalinating concentrated brine according to claim 1, characterized in that: The top of the support wall (1) is provided with a horizontal support platform (2), a front inclined support rod (3) is provided on the front side of the horizontal support platform (2), a front fresh water evaporation collection membrane (4) is provided on the inner side of the front inclined support rod (3), a rear inclined support rod (16) is provided on the rear side of the horizontal support platform (2), and a concentrated brine conveying pipe (18) connected to the concentrated brine spray pipe (11) is installed on the rear inclined support rod (16).

3. The solar-powered self-heating system for desalinating concentrated brine according to claim 1, characterized in that: A side freshwater evaporation collection membrane (20) is provided between the support wall (1) and the front freshwater evaporation collection membrane (4) on both sides. An auxiliary collection channel (23) connected to the freshwater collection channel (22) is provided at the bottom of the side freshwater evaporation collection membrane (20).

4. The solar-powered self-heating system for desalinating concentrated brine according to claim 1, characterized in that: The front side (13) and the two inclined sides (14) all include an inner insulation layer. A solar radiation heat absorption layer is provided on the front side of the inner insulation layer. A heat absorption coating is uniformly sprayed on the solar radiation heat absorption layer. A heat-resistant, light-transmitting, and heat-conducting protective layer is provided on the outside of the heat absorption coating. A spray nozzle (12) that matches the top of the front side (13) and the two inclined sides (14) is provided at the bottom of the concentrated brine spray pipe (11). The support wall (1) is connected to the inner insulation layer provided on the front side (13) through the third connecting crossbar (21).

5. The solar-powered self-heating system for desalinating concentrated brine according to claim 1, characterized in that: The top width of the front side (13) is not greater than its bottom width, the bottom width of the front side (13) is not greater than the width of the concentrated brine tank (5), the top width of the oblique side (14) is not greater than its bottom width, and the bottom width of the oblique side (14) is not greater than one-quarter of the length of the concentrated brine tank (5).

6. The solar-powered self-heating system for desalinating concentrated brine according to claim 2, characterized in that: A first connecting crossbar (19) is provided between the rear diagonal support rod (16) and the support wall (1), and a second connecting crossbar (17) is provided between two adjacent rear diagonal support rods (16). The support wall (1) is set on the top outer edge of the concentrated brine tank (5) in the length direction or on the bottom wall of the concentrated brine tank (5). The support wall (1) is set perpendicular to the horizontal plane or inclined towards the rear diagonal support rod (16). The transverse support platform (2) is a plate structure parallel to the horizontal plane.

7. The solar-powered self-heating system for desalinating concentrated brine according to claim 1, characterized in that: The adaptive heating evaporation frame (6) is provided with a line limiting tube (7) at the top, and a line mounting hole (8) that cooperates with the line limiting tube (7) is provided on the support wall (1). The heating tube (24) is connected to the controller (25) located outside the support wall (1) through the wire installed in the line limiting tube (7) and the line mounting hole (8).

8. A method for desalinating concentrated brine using a solar-powered self-heating salt pond system as described in claim 1, characterized in that, The method is as follows: When the solar radiation intensity reaches the preset requirement, the front side (13) and the two inclined sides (14) absorb sunlight and convert it into heat energy and generate heat. After reaching the preset temperature, the concentrated brine is sprayed through the spray nozzle (12) set at the bottom of the concentrated brine spray pipe (11) to the top of the front side (13) and the two inclined sides (14) and flows downward. During the flow, the heat energy on the surface of the front side (13) and the two inclined sides (14) is absorbed by the concentrated brine. The fresh water component in the concentrated brine gradually evaporates and forms water vapor. The water vapor is condensed and collected into the fresh water collection channel (22) through the fresh water evaporation collection membrane (4) on the front side. The remaining concentrated brine is finally recycled to the concentrated brine pool (5) through the bottom of the front side (13) and the two inclined sides (14). Alternatively, when the solar radiation intensity does not meet the preset requirements, 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 activated to drive the adaptive heating evaporation frame (6) to rise and fall, so that the setting height of the heating tube (24) corresponds to the height of the concentrated brine liquid surface. After the fresh water component in the concentrated brine evaporates, water vapor is formed. The water vapor is condensed by the front fresh water evaporation collection membrane (4) and collected into the fresh water collection channel (22).

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