Hydrogel-reverse osmosis membrane coupling interface evaporation device for desalination treatment of heavy salt water

Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a hydrogel-reverse osmosis membrane coupling interface evaporation device for desalination treatment of heavy salt water. Comprising an evaporation device body, an electronic balance, a sunlight simulation device and a constant-temperature and constant-humidity cavity, the whole evaporation device body is placed in the constant-temperature and constant-humidity cavity, and the constant-temperature and constant-humidity cavity is used for guaranteeing constant temperature and humidity in the evaporation process. For seawater desalination, brine concentration, high-salinity wastewater deep treatment and other processes, interface evaporation and membrane filtration processes are coupled, Laplace force generated by hydrogel surface evaporation in the evaporation process is used for providing power needed by membrane filtration, the evaporation process and the desalination process are decoupled, salt is effectively prevented from scaling on the surface of hydrogel, and the membrane filtration efficiency is improved. A novel solution idea and scheme are provided for low-consumption and high-efficiency desalination, the interface evaporators can be manufactured in batches by adopting the hydrogel and the reverse osmosis membrane body, and the method has the characteristics of low cost, simplicity in operation and the like, and has very high practicability and economical efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, in particular to a hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination treatment. Background Art

[0002] Water treatment, represented by two-dimensional and three-dimensional structure solar evaporators, can achieve desalination of high-salinity water by utilizing solar energy, environmental thermal energy and other energies. It has the characteristics of no secondary pollution, low carbon and environmental protection, and has good application prospects in the fields of seawater desalination, brine concentration, and high-salinity wastewater deep treatment. Therefore, the design and preparation of high evaporation flux and scalable interfacial evaporators have received extensive attention in recent years.

[0003] However, the above technology often has the following defects: in the design and preparation of the existing interface evaporator, the high salt water evaporates at the interface, and the interface salt concentration increases continuously during the evaporation process. Too high interface salt concentration will cause interface salt scaling, resulting in a decrease in evaporation rate. Therefore, the present invention provides a hydrogel-reverse osmosis membrane coupled interface evaporation device for high salt water desalination treatment. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination treatment of the present invention comprises an evaporation device body, an electronic balance, a sunlight simulation device and a constant temperature and humidity chamber; the evaporation device body is placed as a whole in the constant temperature and humidity chamber, the constant temperature and humidity chamber is used to ensure constant temperature and humidity during the evaporation process, the electronic balance is used to measure the mass change of the evaporation device body and calculate the evaporation rate, and the sunlight simulation device is used to simulate sunlight;

[0006] Preferably, the evaporation device body includes an evaporator, a reverse osmosis membrane body, fiber paper, hydrogel, a water storage tank, a sealing ring and a sealing cover, the top surface and the bottom surface of the reverse osmosis membrane body are fixedly connected with sealing rings, the top surface of the water storage tank is sealingly connected to the sealing ring, the water storage tank is used to hold high-salt water to be treated, the bottom surface of the sealing cover is sealingly connected to the sealing ring, one side of the water storage tank is connected to a water replenishment channel, the evaporator is inserted in the sealing cover, and the water storage tank is provided with a water replenishment mechanism for replenishing water inside it.

[0007] Preferably, the evaporator is composed of glass fiber paper and hydrogel, wherein the glass fiber paper serves as an intermediate layer and is tightly wrapped by the hydrogel, wherein the hydrogel is composed of acrylamide hydrogel or 2-hydroxyethyl methacrylate hydrogel, and the water content of the hydrogel is 30-60% by mass.

[0008] Preferably, the sealing ring has a thickness of 1 to 5 mm, and has a circular opening in the middle for storing deionized water, and is connected to the evaporator to supply water to the evaporator; a 1 to 2 mm vertical through slit is present in the middle of the sealing cover, and the evaporator is vertically inserted into the slit; a sealing structure for sealing the evaporator is provided on the sealing cover, and when the device is running, the bottom of the evaporator extends into the hollow interior of the sealing ring by 1 to 5 mm and does not contact the reverse osmosis membrane body.

[0009] Preferably, the evaporation device body is sealed, and the power for water to pass through the reverse osmosis membrane body is provided by the Laplace force generated by the evaporation of the hydrogel surface. The reverse osmosis membrane body needs to be soaked in deionized water for 24 hours before use to completely wet the membrane. The reverse osmosis front side of the reverse osmosis membrane body faces downward and is in direct contact with the high-salt water in the water storage tank.

[0010] Preferably, the water replenishment mechanism includes a water replenishment tank fixed to the water storage bin by a bracket, the bottom end of the water replenishment tank is connected with a water inlet pipe, the side of the water replenishment tank close to the water replenishment channel is connected with a water outlet pipe, sealing mechanisms are provided in the water inlet pipe and the water outlet pipe, a conduit is connected between the water outlet pipe and the water replenishment channel, the side of the water storage bin away from the water replenishment channel is connected with a circular pipe provided with a water inlet check valve, the inner wall of the water replenishment tank is sealingly and slidably connected with a push plate, and a driving mechanism for driving the push plate to move is provided on the water replenishment tank.

[0011] Preferably, the driving mechanism includes an electromagnet fixed to the top surface of the inner wall of the water replenishing tank, the push plate is made of a magnetic material that repels the electromagnet, a group of first springs are fixedly connected between the top surface of the push plate and the water replenishing tank, the side wall of the water storage tank is connected to a warning tube, the warning tube is fixedly connected to a guide rod and a first contact on the side of the inner wall away from the water storage tank, a disc is sealingly and slidably connected to the guide rod, the disc is sealingly and slidably connected to the inner wall of the warning tube, the disc is made of a lightweight material that can float, and the disc is fixedly connected to a second contact on the side away from the water storage tank, and the electromagnet can be started for 7 seconds to 10 seconds when the first contact is disengaged from the second contact.

[0012] Preferably, the sealing mechanism includes a sealing ball arranged in the water inlet pipe and the water outlet pipe, the interiors of the water inlet pipe and the water outlet pipe are both funnel-shaped, the end of the water inlet pipe with a larger opening faces upward, and the end of the water outlet pipe with a larger opening is close to the catheter, and the sealing ball is connected to the water inlet pipe and the water outlet pipe through an elastic rope.

[0013] Preferably, an elastic plate is fixedly connected to the bottom surface of the push plate, a plurality of groups of circular holes are provided in the elastic plate, and impact balls are arranged in the circular holes.

[0014] Preferably, the sealing structure includes a hollow elastic disk fixedly connected to the top surface of the sealing cover, the elastic disk is provided with a socket corresponding to the slit on the sealing cover, a cavity is provided in the water replenishing tank, a magnetic plate that is magnetically attracted to the push plate is sealingly and slidably connected in the cavity, a second spring is fixedly connected between the top surface of the magnetic plate and the inner wall of the cavity, a connecting pipe is connected between the cavity and the elastic disk, and a disengagement mechanism for disengaging the magnetic plate from the push plate is provided in the water replenishing tank.

[0015] Preferably, the disengagement mechanism includes a driving block fixedly connected to the side of the push plate close to the cavity, the side of the driving block close to the cavity is sealed with the inner wall of the water replenishing tank, and this side is open, the bottom surface of the water replenishing tank is provided with a water inlet hole, the inner wall of the cavity is provided with a slide groove connected to the inner wall of the water replenishing tank, the inner wall of the slide groove is sealingly and slidingly connected with a block, the bottom surface of the slide groove is provided with a limiting groove, the limiting groove is fixedly connected with an elastic member for resetting the block, and the inner wall of the cavity is fixedly connected with a limiting block located above the magnetic plate.

[0016] Preferably, a group of connecting grooves connected to the circular hole are opened in the elastic disk, and an arc-shaped elastic sheet is fixedly connected to the inner wall of the connecting groove. The elastic sheet is arched toward the side close to the circular hole, and a group of grooves are opened on the arched side of the elastic sheet, and a torsion spring is twisted into the groove to twist the joint scraper.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention couples the interfacial evaporation and membrane filtration processes for seawater desalination, brine concentration, and high-salt wastewater deep treatment, and utilizes the Laplace force generated by the evaporation of the hydrogel surface during the evaporation process to provide the power required for membrane filtration, thereby decoupling the evaporation process from the desalination process, effectively avoiding the scaling of salt on the hydrogel surface, and providing a new solution and scheme for low-cost and high-efficiency desalination. The interfacial evaporator can be mass-produced using the hydrogel and the reverse osmosis membrane body, and has the characteristics of low cost and simple operation, and is highly practical and economical.

[0019] 2. The present invention utilizes Laplace force to achieve water lifting, utilizes solar energy and environmental heat energy for three-dimensional interface evaporation, and uses hydrogel to reduce water evaporation enthalpy. It is suitable for high-salt water treatment and its application is not limited by region. That is, the present invention has a wide range of application and strong universality.

[0020] 3. The interfacial evaporation device body that couples the membrane process and the interfacial evaporation process can use the reverse osmosis membrane body to filter the brine to prevent the accumulation of salt on the evaporation interface; and use the Laplace force generated by the evaporation interface to provide the driving force required for membrane filtration to ensure that the evaporation process is stable and efficient. In addition, it has been reported that hydrogels can reduce the evaporation enthalpy of water. Using hydrogels as interfacial evaporation materials can improve heat utilization efficiency and evaporation rate. By designing a rationally structured evaporation device body, utilizing the efficient coupling of membrane filtration and interfacial evaporation, and using hydrogels to reduce the evaporation enthalpy of water, effective prevention and control of salt scaling and effective utilization of low-quality thermal energy can be achieved, which is a feasible solution for designing an efficient and stable interfacial evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 is a three-dimensional diagram of the evaporation device body of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the evaporation device body, electronic balance, sunlight simulation device and constant temperature and humidity chamber in the present invention;

[0024] Figure 3 It is a structural schematic diagram of the evaporation device body and the water replenishment mechanism in the present invention;

[0025] Figure 4 It is a schematic diagram of the internal structure of the water replenishment tank and the water storage tank in the present invention;

[0026] Figure 5 yes Figure 4 Schematic diagram of some structures;

[0027] Figure 6 yes Figure 4 A magnified image of point A;

[0028] Figure 7 yes Figure 5 The enlarged view of point B;

[0029] Figure 8 is a cross-sectional view of the elastic disk of the present invention;

[0030] Fig. 9 yes Figure 8 Enlarged view of point C;

[0031] Fig.10 is the Δm-t linear fitting curve diagram of Example 3;

[0032] Fig.11 It is the Δm-t linear fitting curve diagram of Example 4.

[0033] In the figure: 1. evaporation device body; 2. electronic balance; 3. sunlight simulation device; 4. constant temperature and humidity chamber; 5. evaporator; 6. reverse osmosis membrane body; 7. water storage tank; 8. sealing ring; 9. sealing cover; 10. water replenishment channel; 11. conduit; 12. water replenishment tank; 13. water inlet pipe; 14. water outlet pipe; 15. sealing ball; 16. elastic rope; 17. disc; 18. guide rod; 19. first contact; 20. second contact; 21. electromagnet; 22. push plate; 23. cavity; 24. connecting pipe; 25. elastic plate; 26. magnetic plate; 27. stopper; 28. limit groove; 29. ​​drive block; 30. water inlet hole; 31. round hole; 32. elastic sheet; 33. groove; 34. jack; 35. connecting groove; 36. scraper; 37. elastic disc. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] Embodiment 1: Figure 1 to Figure 2 As shown, the hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination treatment described in the embodiment of the present invention comprises an evaporation device body 1, an electronic balance 2, a sunlight simulation device 3 and a constant temperature and humidity chamber 4; the evaporation device body 1 is placed as a whole in the constant temperature and humidity chamber 4, the constant temperature and humidity chamber 4 is used to ensure constant temperature and humidity during the evaporation process, the electronic balance 2 is used to measure the mass change of the evaporation device body 1 and calculate the evaporation rate, and the sunlight simulation device 3 is used to simulate sunlight;

[0036] The evaporation device body 1 includes an evaporator 5, a reverse osmosis membrane body 6, fiber paper, hydrogel, a water storage bin 7, a sealing ring 8 and a sealing cover 9. The top and bottom surfaces of the reverse osmosis membrane body 6 are fixedly connected with a sealing ring 8. The top surface of the water storage bin 7 is sealed with the sealing ring 8. The water storage bin 7 is used to hold high-salt water to be treated. The bottom surface of the sealing cover 9 is sealed with the sealing ring 8. One side of the water storage bin 7 is connected with a water replenishment channel 10. The evaporator 5 is inserted in the sealing cover 9. The water storage bin 7 is provided with a water replenishment mechanism for replenishing water inside.

[0037] The evaporator 5 is composed of glass fiber paper and hydrogel. The glass fiber paper is used as an intermediate layer and is tightly wrapped by the hydrogel. The hydrogel is composed of acrylamide hydrogel or 2-hydroxyethyl methacrylate hydrogel. The water content of the hydrogel is 30-60% by mass.

[0038] The sealing ring 8 has a thickness of 1 to 5 mm, and has a circular opening in the middle for storing deionized water. The sealing ring 8 is connected to the evaporator 5 to supply water to the evaporator 5. A vertical slit of 1 to 2 mm is provided in the middle of the sealing cover 9, and the evaporator 5 is vertically inserted into the slit. A sealing structure for sealing the evaporator 5 is provided on the sealing cover 9. When the device is running, the bottom of the evaporator 5 extends into the hollow interior of the sealing ring 8 by 1 to 5 mm and does not contact the reverse osmosis membrane body 6.

[0039] The evaporation device body 1 is sealed, and the power for water to pass through the reverse osmosis membrane body 6 is provided by the Laplace force generated by the evaporation of the hydrogel surface. The reverse osmosis membrane body 6 needs to be soaked in deionized water for 24 hours before use to completely wet the membrane. The reverse osmosis front side of the reverse osmosis membrane body 6 faces downward and is in direct contact with the high-salt water in the water storage tank 7.

[0040] Embodiment 2: Figures 3 to 9 As shown, compared with Example 1, another embodiment of the present invention is: the water replenishment mechanism includes a water replenishment tank 12 fixed on the water storage bin 7 by a bracket, the bottom end of the water replenishment tank 12 is connected with a water inlet pipe 13, the side of the water replenishment tank 12 close to the water replenishment channel 10 is connected with a water outlet pipe 14, the water inlet pipe 13 and the water outlet pipe 14 are both provided with sealing mechanisms, the water outlet pipe 14 and the water replenishment channel 10 are connected with a conduit 11, the side of the water storage bin 7 away from the water replenishment channel 10 is connected with a round pipe provided with a water inlet check valve, the inner wall of the water replenishment tank 12 is sealingly and slidably connected with a push plate 22, and the water replenishment tank 12 is provided with a driving mechanism for driving the push plate 22 to move;

[0041] During the execution of the evaporation operation, in order to ensure that the water volume in the water storage tank 7 is maintained in a sufficient state, the water replenishment process currently relies on manual operation, which increases the complexity of replenishing salt water to a certain extent. If the staff fails to replenish the salt water in time, it may have an adverse effect on the normal operation of the entire device. The present invention opens the sealing mechanism in the water inlet pipe 13 and the water outlet pipe 14, and then connects an external pipe to the water inlet pipe 13, so that the salt water can enter the water replenishment tank 12 from the water inlet pipe 13 for storage. When the water level in the water replenishment tank 12 rises, it will push the push plate 22 to move upward, and the water in the water replenishment tank 12 will be stored. After storage is completed, the sealing mechanism will seal the water inlet pipe 13, and then use the circular tube to inject brine into the water storage tank 7. At this time, when the device is working, when the brine in the water storage tank 7 is insufficient, the driving mechanism will drive the push plate 22 to move downward, thereby pushing the water in the water replenishment tank 12, and the sealing mechanism in the water storage outlet pipe 14 will open, so that the brine enters the water storage tank 7 along the outlet pipe 14, the conduit 11 and the water replenishment channel 10 to replenish the brine in the water storage tank 7. The above mechanism achieves the effect of automatically replenishing the water in the water storage tank 7, thereby ensuring the stable operation of the device.

[0042] The driving mechanism includes an electromagnet 21 fixed to the top surface of the inner wall of the water replenishment tank 12, the push plate 22 is made of a magnetic material that repels the electromagnet 21, a group of first springs are fixedly connected between the top surface of the push plate 22 and the water replenishment tank 12, the side wall of the water storage tank 7 is connected to a warning tube, the warning tube is fixedly connected to a guide rod 18 and a first contact 19 on the side of the inner wall away from the water storage tank 7, a disc 17 is sealed and slidably connected to the guide rod 18, the disc 17 is sealed and slidably connected to the inner wall of the warning tube, the disc 17 is made of a lightweight material that can float, and the disc 17 is fixedly connected to a second contact 20 on the side away from the water storage tank 7, and the electromagnet 21 can be started when the first contact 19 is separated from the second contact 20, 7 seconds to 10 seconds;

[0043] In the present application, when salt water is injected into the water storage tank 7 through the circular tube, the salt water will enter the warning tube. As the water level rises, the salt water will push the disc 17 to move in the warning tube, so that the first contact 19 contacts the second contact 20. In the process of the water level in the water storage tank 7 continuously decreasing, after the water level drops below the highest point of the warning tube, the disc 17 will move with the water level. At this time, the first contact 19 will be disengaged from the second contact 20, thereby starting the electromagnet 21 to push the push plate 22 to push the water in the water replenishment tank 12 into the water storage tank 7. Through the above mechanism, when the water level in the water storage tank 7 drops to a predetermined position, the water storage tank 7 can be automatically replenished with water.

[0044] The sealing mechanism includes a sealing ball 15 arranged in the water inlet pipe 13 and the water outlet pipe 14. The interiors of the water inlet pipe 13 and the water outlet pipe 14 are both funnel-shaped. The end with a larger opening of the water inlet pipe 13 faces upward, and the end with a larger opening of the water outlet pipe 14 is close to the conduit 11. The sealing ball 15 is connected to the water inlet pipe 13 and the water outlet pipe 14 through an elastic rope 16;

[0045] When water is introduced into the water inlet pipe 13, the water flow will push the sealing ball 15 in the water inlet pipe 13 to no longer seal the water inlet pipe 13. At this time, water will enter the water supply tank 12. When the water level reaches the water outlet pipe 14, the elastic rope 16 pulls the sealing ball 15 in the water outlet pipe 14, so that the sealing ball 15 can continue to seal the water outlet pipe 14. After the water supply tank 12 is filled with water, the water injection is stopped. At this time, the elastic rope 16 will pull the sealing ball 15 to seal the water inlet pipe 13. When the water storage tank 7 needs to be replenished with water, the push plate 22 pushes the water. At this time, the water will push the water outlet pipe 14. The sealing ball 15 inside the water outlet pipe 13 makes the sealing ball 15 no longer seal the water outlet pipe 14. The sealing ball 15 in the water inlet pipe 13 will only fit more closely with the inner wall of the water inlet pipe 13 when pushed by the water pressure to prevent water leakage. After the water storage tank 7 is replenished with water, the sealing elastic rope 16 in the water outlet pipe 14 will seal the water outlet pipe 14 to prevent the first spring from pulling the push plate 22 to reset, which will suck the water in the water storage tank 7 out from the conduit 11. When the push plate 22 is reset, it will suck the sealing ball 15 in the water inlet pipe 13, so that air can enter the water replenishment tank 12 to allow the push plate 22 to reset.

[0046] The bottom surface of the push plate 22 is fixedly connected with an elastic plate 25, and a plurality of groups of circular holes 31 are provided in the elastic plate 25, and impact balls are arranged in the circular holes 31; in the present application, the water to be used is salt water. If there is water remaining on the bottom surface of the push plate 22, crystals will be formed, which will affect the use of the push plate 22 for a long time. At this time, the electromagnet 21 can be manually operated to be started intermittently and the push plate 22 can be pushed repeatedly. At this time, the push plate 22 will drive the elastic plate 25 to move up and down under the action of the first spring. At this time, the impact balls in the elastic plate 25 will hit the circular holes 31, thereby making the elastic plate 25 shake. At this time, the elastic plate 25 is in contact with the water, and the water will remain on the elastic plate 25, thereby shaking off the water on the elastic plate 25 to prevent water from remaining on the bottom surface of the elastic plate 25.

[0047] The sealing structure includes a hollow elastic disk 37 fixedly connected to the top surface of the sealing cover 9, a plug hole 34 corresponding to the slit on the sealing cover 9 is provided on the elastic disk 37, a cavity 23 is provided in the water replenishment tank 12, a magnetic plate 26 magnetically attracted to the push plate 22 is sealed and slidably connected in the cavity 23, a second spring is fixedly connected between the top surface of the magnetic plate 26 and the inner wall of the cavity 23, a connecting pipe 24 is connected between the cavity 23 and the elastic disk 37, and a disengagement mechanism for disengaging the magnetic plate 26 from the push plate 22 is provided in the water replenishment tank 12;

[0048] In the present application, the electromagnet 21 pushes the push plate 22 to move downward. At this time, there is no water in the water replenishment tank 12. At this time, the push plate 22 will drive the magnetic plate 26 to move downward. At this time, the cavity 23 will absorb the gas in the elastic disk 37 from the connecting pipe 24, so that the elastic disk 37 will shrink. At this time, the aperture of the plug hole 34 will become larger, which is convenient for the evaporator 5 to be inserted into the plug hole 34. Then the evaporator 5 is inserted into the plug hole 34. At this time, the evaporator 5 will enter the slit. At the same time, the function of shrinking the elastic disk 37 is also conducive to the subsequent removal of the evaporator 5. Then the electromagnet 21 is closed. At this time, the second spring The magnetic plate 26 will be pulled to reset, and the first spring will also drive the push plate 22 to reset. When the magnetic plate 26 is reset, it will push the gas in the cavity 23 from the connecting pipe 24 into the elastic disk 37 to expand. At this time, the socket 34 will fit with the evaporator 5, so as to achieve the effect of sealing the evaporator 5. After that, water is added to the water replenishment tank 12. When the push plate 22 moves downward to push the water, the magnetic plate 26 is separated from the push plate 22 through the disengagement mechanism, so that when the push plate 22 moves downward, it will not drive the magnetic plate 26 to move downward, thereby preventing the elastic disk 37 from drying up and affecting the sealing of the evaporator 5.

[0049] The disengagement mechanism includes a driving block 29 fixedly connected to the side of the push plate 22 close to the cavity 23, the side of the driving block 29 close to the cavity 23 is sealed with the inner wall of the water replenishment tank 12, and this side is open, the bottom surface of the water replenishment tank 12 is provided with a water inlet hole 30, the inner wall of the cavity 23 is provided with a slide connected to the inner wall of the water replenishment tank 12, the inner wall of the slide is sealed and slidably connected with a block 27, the bottom surface of the slide is provided with a limiting groove 28, the limiting groove 28 is fixedly connected with an elastic member for resetting the block 27, and the inner wall of the cavity 23 is fixedly connected with a limiting block located above the magnetic plate 26;

[0050] In the present invention, when the push plate 22 moves downward to push the water, the water will enter the driving block 29 from the circular hole 31. Then, when the driving block 29 reaches the push block, the push plate 22 is aligned with the magnetic plate 26. At this time, the driving block 29 continues to move downward, and the water pressure will push the stopper 27, so that the stopper 27 blocks the magnetic plate 26. After that, when the push plate 22 moves to the position of the magnetic plate 26, because the magnetic plate 26 is limited by the stopper 27, the push plate 22 cannot drive the magnetic plate 26 to move downward. Until the top surface of the driving block 29 is separated from the stopper 27, the elastic member will drive the push block to reset. When no water is added to the water replenishment tank 12, when the push plate 22 is moving, there will be no water to push the push block. At this time, the magnetic plate 26 can be driven to move normally. Through the above-mentioned mechanism, the connection state of the magnetic plate 26 and the push plate 22 can be controlled under different circumstances.

[0051] The elastic disk 37 is provided with a group of connecting grooves 35 connected with the circular hole 31. The inner wall of the connecting groove 35 is fixedly connected with an arc-shaped elastic sheet 32. The elastic sheet 32 ​​is arched toward the side close to the circular hole 31. A group of grooves 33 are provided on the arched side of the elastic sheet 32. The grooves 33 are twisted by a torsion spring torsion joint scraper 36.

[0052] In the present application, during the expansion of the elastic disk 37, the gas preferentially pushes the elastic sheet 32 ​​to expand, so that the elastic sheet 32 ​​fits with the evaporator 5, and then the circular hole 31 fits with the evaporator 5. The double sealing of the elastic sheet 32 ​​and the circular hole 31 can improve the sealing effect of the evaporator 5. When the elastic sheet 32 ​​fits with the evaporator 5, the scraper will rotate and be retracted into the groove 33. When the elastic disk 37 is deflated, the elastic sheet 32 ​​will move away from the evaporator 5. At this time, the scraper 36 will contact the evaporator 5. Then, when the evaporator 5 is taken away, the scraper 36 will scrape off the water on the evaporator 5. When the evaporator 5 is in use, water will remain on the surface of the evaporator 5. The scraped water will enter the water storage tank 7 for continued use, thereby preventing unnecessary waste.

[0053] Embodiment 3: Fig.10 As shown, the evaporation device body 1 is used to measure the evaporation rate of the interface evaporator 5 in treating 3.5wt% sodium chloride brine, and the steps are as follows:

[0054] The temperature and humidity are controlled by a constant temperature and humidity chamber 4, the temperature and humidity are 20°C and 40% respectively;

[0055] Prepare a sodium chloride solution with a mass concentration of 3.5wt% in the water storage tank 7, and adjust the solution temperature to 20°C;

[0056] Assemble the evaporation device of the hydrogel-reverse osmosis membrane coupling interface together, and add sodium chloride solution in the water replenishment channel 10, with the liquid level higher than the evaporator 5;

[0057] When the liquid level is stable, add an AM1.5G filter to the sunlight simulation device 3, turn on the sunlight simulation light source so that the light directly hits the evaporator 5, adjust the light source intensity to 1000W / m2, record the mass of the device every 10 minutes, and calculate the mass change Δm;

[0058] With time t as the horizontal coordinate and mass change Δm as the vertical coordinate, a linear fitting is performed on the measured data to obtain a linear fitting curve;

[0059] According to the fitting curve results, the evaporation rate of evaporator 5 is calculated as v = 0.00478 g / min, and the evaporation rate per unit area R is calculated as follows:

[0060]

[0061] The evaporation rate of the evaporator 5 when treating 3.5wt% sodium chloride brine is 2.87kg / (m 2 h).

[0062] Embodiment 4: Fig.11 As shown, the evaporation device body 1 is used to measure the evaporation rate of the interface evaporator 5 in treating 10wt% sodium chloride brine, and the steps are as follows: the temperature and humidity are controlled by the constant temperature and humidity chamber 4, and the temperature and humidity are 20°C and 40% respectively;

[0063] Prepare a sodium chloride solution with a mass concentration of 10wt% in the water storage tank 7, and adjust the solution temperature to 20°C;

[0064] Assemble the hydrogel-reverse osmosis membrane coupled interface evaporation device body 1 together, and add sodium chloride solution into the water replenishment channel 10, with the liquid level higher than the evaporator 5;

[0065] When the liquid level is stable, add an AM1.5G filter to the sunlight simulation device 3, turn on the sunlight simulation light source so that the light directly hits the interface evaporator 5, adjust the light source intensity to 1000W / m2, record the mass of the device every 10 minutes, and calculate the mass change Δm;

[0066] With time t as the horizontal coordinate and mass change Δm as the vertical coordinate, a linear fitting is performed on the measured data to obtain a linear fitting curve;

[0067] According to the fitting curve results, the evaporation rate of evaporator 5 is calculated as v = 0.00442 g / min. The evaporation rate per unit area is calculated as follows:

[0068]

[0069] The evaporation rate of the evaporator 5 when treating 10wt% sodium chloride brine is 2.65kg / (m 2 h).

[0070] Working principle: The present invention opens the sealing mechanism in the water inlet pipe 13 and the water outlet pipe 14, and then connects an external pipe to the water inlet pipe 13, so that the salt water can enter the water replenishment tank 12 from the water inlet pipe 13 for storage. When the water level in the water replenishment tank 12 rises, it will push the push plate 22 to move upward. After the water in the water replenishment tank 12 is stored, the sealing mechanism will seal the water inlet pipe 13, and then use the round pipe to inject salt water into the water storage tank 7. At this time, when the device is working, if the salt water in the water storage tank 7 is insufficient, the driving mechanism will drive the push plate 22 to move downward, thereby pushing the water in the water replenishment tank 12, and the sealing mechanism in the water storage outlet pipe 14 will open, so that the salt water can enter the water storage tank 7 along the outlet pipe 14, the conduit 11 and the water replenishment channel 10, so as to replenish the salt water in the water storage tank 7. The above mechanism achieves the effect of automatically replenishing the water in the water storage tank 7, thereby ensuring the stable operation of the device; when the salt water is injected into the water storage tank 7 through the round tube, the salt water will enter the warning tube, and as the water level rises, the salt water will push the disc 17 to move in the warning tube, so that the first contact 19 contacts the second contact 20. In the process of the water level in the water storage tank 7 continuously decreasing, after the water level drops below the highest point of the warning tube, the disc 17 will move with the water level, and the first contact 19 will be separated from the second contact 20, thereby starting the electromagnet 21 to push the push plate 22 to push the water in the water replenishment tank 12 into the water storage tank 7. The above mechanism can achieve the effect of automatically replenishing the water storage tank 7 when the water level in the water storage tank 7 drops to a predetermined position;

[0071] When the water inlet pipe 13 is filled with water, the water flow will push the sealing ball 15 in the water inlet pipe 13 to no longer seal the water inlet pipe 13. At this time, water will enter the water replenishment tank 12. When the water level reaches the water outlet pipe 14, the elastic rope 16 pulls the sealing ball 15 in the water outlet pipe 14, so that the sealing ball 15 can continue to seal the water outlet pipe 14. After the water replenishment tank 12 is filled with water, the water injection is stopped. At this time, the elastic rope 16 will pull the sealing ball 15 to seal the water inlet pipe 13. When the water storage tank 7 needs to be replenished with water again, the push plate 22 pushes the water. At this time, the water will push the sealing ball 15 in the water outlet pipe 14, so that the sealing ball 15 no longer seals the water outlet pipe 14. The sealing ball 15 in the water inlet pipe 13 will only fit more closely with the inner wall of the water inlet pipe 13 when pushed by the water pressure to prevent water leakage. After the water storage tank 7 is replenished with water, the sealing elastic rope in the water outlet pipe 14 When the push plate 22 is reset, the sealing ball 15 in the water inlet pipe 13 is sucked out, so that air can be taken into the water replenishment tank 12 to reset the push plate 22. In this application, the water to be used is salt water. If there is water remaining on the bottom surface of the push plate 22, it will form crystals, which will affect the use of the push plate 22 for a long time. At this time, the electromagnet 21 can be manually operated to start intermittently and push the push plate 22 repeatedly. At this time, the push plate 22 will drive the elastic plate 25 to move up and down under the action of the first spring. At this time, the impact ball in the elastic plate 25 will hit the circular hole 31, so that the elastic plate 25 will shake. At this time, the elastic plate 25 is in contact with the water, and the water will remain on the elastic plate 25, thereby shaking off the water on the elastic plate 25 to prevent water from remaining on the bottom surface of the elastic plate 25.

[0072] In the present application, the electromagnet 21 pushes the push plate 22 to move downward. At this time, there is no water in the water replenishment tank 12. At this time, the push plate 22 will drive the magnetic plate 26 to move downward. At this time, the cavity 23 will absorb the gas in the elastic disk 37 from the connecting pipe 24, so that the elastic disk 37 will shrink. At this time, the aperture of the plug hole 34 will become larger, which is convenient for the evaporator 5 to be inserted into the plug hole 34. Then the evaporator 5 is inserted into the plug hole 34. At this time, the evaporator 5 will enter the slit. At the same time, the function of shrinking the elastic disk 37 is also conducive to the subsequent removal of the evaporator 5. Then the electromagnet 21 is closed. At this time, the second spring The magnetic plate 26 will be pulled to reset, and the first spring will also drive the push plate 22 to reset. When the magnetic plate 26 is reset, it will push the gas in the cavity 23 from the connecting pipe 24 into the elastic disk 37 to expand. At this time, the plug hole 34 will fit with the evaporator 5, so as to achieve the effect of sealing the evaporator 5. Then, water is added to the water replenishment tank 12. When the push plate 22 moves downward to push the water, the magnetic plate 26 is separated from the push plate 22 through the separation mechanism, so that when the push plate 22 moves downward, it does not drive the magnetic plate 26 to move downward, so as to prevent the elastic disk 37 from shrinking and affecting the sealing of the evaporator 5.

[0073] When the push plate 22 of the present invention moves downward to push the water, the water will enter the driving block 29 from the circular hole 31. Then, when the driving block 29 reaches the push block, the push plate 22 is aligned with the magnetic plate 26. At this time, the driving block 29 continues to move downward, and the water pressure will push the stopper 27, so that the stopper 27 blocks the magnetic plate 26. After that, when the push plate 22 moves to the position of the magnetic plate 26, because the magnetic plate 26 is limited by the stopper 27, the push plate 22 cannot drive the magnetic plate 26 to move downward. Until the top surface of the driving block 29 is separated from the stopper 27, the elastic member will drive the push block to reset. When no water is added to the water replenishment tank 12, when the push plate 22 is moving, there will be no water to push the push block. At this time, the magnetic plate 26 can be driven to move normally. Through the above mechanism, the connection state of the magnetic plate 26 and the push plate 22 can be controlled under different conditions.

[0074] In the present application, during the expansion of the elastic disk 37, the gas preferentially pushes the elastic sheet 32 ​​to expand, so that the elastic sheet 32 ​​fits with the evaporator 5, and then the circular hole 31 fits with the evaporator 5. The double sealing of the elastic sheet 32 ​​and the circular hole 31 can improve the sealing effect of the evaporator 5. When the elastic sheet 32 ​​fits with the evaporator 5, the scraper will rotate and be retracted into the groove 33. When the elastic disk 37 is deflated, the elastic sheet 32 ​​will move away from the evaporator 5. At this time, the scraper 36 will contact the evaporator 5. Then, when the evaporator 5 is taken away, the scraper 36 will scrape off the water on the evaporator 5. When the evaporator 5 is in use, water will remain on the surface of the evaporator 5. The scraped water will enter the water storage tank 7 for continued use, thereby preventing unnecessary waste.

[0075] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0077] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination treatment, comprising an evaporation device body (1), an electronic balance (2), a sunlight simulation device (3) and a constant temperature and humidity chamber (4); characterized in that: The evaporation device body (1) is placed as a whole in a constant temperature and humidity chamber (4). The constant temperature and humidity chamber (4) is used to ensure constant temperature and humidity during the evaporation process. The electronic balance (2) is used to measure the mass change of the evaporation device body (1) and calculate the evaporation rate. The sunlight simulation device (3) is used to simulate sunlight. The evaporation device body (1) comprises an evaporator (5), a reverse osmosis membrane body (6), fiber paper, hydrogel, a water storage bin (7), a sealing ring (8) and a sealing cover (9); the top surface and the bottom surface of the reverse osmosis membrane body (6) are fixedly connected to the sealing ring (8); the top surface of the water storage bin (7) is sealedly connected to the sealing ring (8); the water storage bin (7) is used to contain high-salt water to be treated; the bottom surface of the sealing cover (9) is sealedly connected to the sealing ring (8); one side of the water storage bin (7) is connected to a water replenishment channel (10); the evaporator (5) is inserted in the sealing cover (9); and the water storage bin (7) is provided with a water replenishment mechanism for replenishing water therein.

2. The hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination according to claim 1, characterized in that: The evaporator (5) is composed of glass fiber paper and hydrogel. The glass fiber paper serves as an intermediate layer and is tightly wrapped by the hydrogel. The hydrogel is composed of acrylamide hydrogel or 2-hydroxyethyl methacrylate hydrogel. The water content of the hydrogel is 30-60% by mass.

3. The hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination according to claim 2, characterized in that: The sealing ring (8) has a thickness of 1 to 5 mm and a circular opening in the middle thereof for storing deionized water and is connected to the evaporator (5) to supply water to the evaporator (5). A 1 to 2 mm vertical through slit is present in the middle of the sealing cover (9), and the evaporator (5) is vertically inserted into the slit. A sealing structure for sealing the evaporator (5) is provided on the sealing cover (9).

4. The hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination according to claim 3, characterized in that: The water replenishment mechanism comprises a water replenishment tank (12) fixed on the water storage bin (7) by a bracket, the bottom end of the water replenishment tank (12) is connected to a water inlet pipe (13), the side of the water replenishment tank (12) close to the water replenishment channel (10) is connected to a water outlet pipe (14), sealing mechanisms are provided in the water inlet pipe (13) and the water outlet pipe (14), a conduit (11) is connected between the water outlet pipe (14) and the water replenishment channel (10), the side of the water storage bin (7) away from the water replenishment channel (10) is connected to a round pipe provided with a water inlet check valve, the inner wall of the water replenishment tank (12) is sealingly slidably connected to a push plate (22), and a driving mechanism for driving the push plate (22) to move is provided on the water replenishment tank (12).

5. The hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination according to claim 4, characterized in that: The driving mechanism comprises an electromagnet (21) fixed on the top surface of the inner wall of the water replenishment tank, the push plate (22) is made of a magnetic material that repels the electromagnet (21), a group of first springs are fixedly connected between the top surface of the push plate (22) and the water replenishment tank (12), the side wall of the water storage tank (7) is connected to a warning tube, the warning tube is fixedly connected to a guide rod (18) and a first contact (19) on the side away from the inner wall of the water storage tank (7), the guide rod (18) is sealed and slidably connected to a disc (17), the disc (17) is sealed and slidably connected to the inner wall of the warning tube, the disc (17) is made of a lightweight material that can float, the disc (17) is fixedly connected to a second contact (20) on the side away from the water storage tank (7), and the electromagnet (21) can be started for 7 seconds to 10 seconds when the first contact (19) is separated from the second contact (20).

6. The hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination according to claim 5, characterized in that: The sealing mechanism comprises a sealing ball (15) arranged in a water inlet pipe (13) and a water outlet pipe (14); the interiors of the water inlet pipe (13) and the water outlet pipe (14) are both funnel-shaped; the end of the water inlet pipe (13) with a larger opening faces upward, and the end of the water outlet pipe (14) with a larger opening faces close to the conduit (11); the sealing ball (15) is connected to the water inlet pipe (13) and the water outlet pipe (14) via an elastic rope (16).

7. The hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination according to claim 4, characterized in that: The bottom surface of the push plate (22) is fixedly connected to an elastic plate (25), and a plurality of groups of circular holes (31) are provided in the elastic plate (25), and impact balls are arranged in the circular holes (31).

8. The hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination according to claim 5, characterized in that: The sealing structure comprises a hollow elastic disk (37) fixedly connected to the top surface of the sealing cover (9), the elastic disk (37) is provided with a plug hole (34) corresponding to the slit on the sealing cover (9), a cavity (23) is provided in the water replenishing tank (12), a magnetic plate (26) magnetically attracted to the push plate (22) is sealingly and slidably connected in the cavity (23), a second spring is fixedly connected between the top surface of the magnetic plate (26) and the inner wall of the cavity (23), a connecting pipe (24) is connected between the cavity (23) and the elastic disk (37), and a disengagement mechanism for disengaging the magnetic plate (26) from the push plate (22) is provided in the water replenishing tank (12).

9. The hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination according to claim 8, characterized in that: The disengagement mechanism comprises a driving block (29) fixedly connected to a side of the push plate (22) close to the cavity (23); a side of the driving block (29) close to the cavity (23) is sealed against an inner wall of the water replenishment tank (12), and this side is open; a water inlet hole (30) is provided on the bottom surface of the water replenishment tank (12); a slide groove connected to the inner wall of the water replenishment tank (12) is provided on the inner wall of the cavity (23); a stopper (27) is sealingly and slidably connected to the inner wall of the slide groove; a limiting groove (28) is provided on the bottom surface of the slide groove; an elastic member for resetting the stopper (27) is fixedly connected to the limiting groove (28); and a limiting block located above the magnetic plate (26) is fixedly connected to the inner wall of the cavity (23).

10. The hydrogel-reverse osmosis membrane coupled interface evaporation device for high-salt water desalination according to claim 9, characterized in that: A group of connecting grooves (35) communicating with the circular hole (31) are provided in the elastic disk (37); an arc-shaped elastic sheet (32) is fixedly connected to the inner wall of the connecting groove (35); the elastic sheet (32) is arched toward a side close to the circular hole (31); a group of grooves (33) are provided on the arched side of the elastic sheet (32); a torsion spring twist joint scraper (36) is passed through the groove (33).

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