A solar interface evaporator

Abstract

The present invention discloses a solar interface evaporator with high evaporation efficiency, comprising a local heat collector (3) floating in a solution pool (1); the local heat collector (3) comprises a transport area (31) made of a photothermal material with a pore structure and a heat collection area (32) made of a hydrophobic insulation material with a plurality of bottom-up liquid transport channels (311); magnetic particles (9) are spread on the upper surface of the heat collection area (32); and a driving mechanism is also included that can drive the magnetic particles (9) to move in the liquid film on the upper surface of the heat collection area (32); the driving mechanism comprises a vertical rotating shaft (6), the lower end of the rotating shaft (6) is connected to the motor (2); a rotating magnetic sheet (8) that can rotate with the rotating shaft (6) is also provided on the rotating shaft (6) between the local heat collector (3) and the motor (2); a first magnet (82) and a second magnet (83) with opposite polarities are fixedly provided at both ends of the rotating magnetic sheet (8).

Description

Technical Field

[0001] The invention belongs to the technical field of liquid separation equipment, in particular to a solar interface evaporator. Background Art

[0002] The solar interface evaporator utilizes a double-layer structure, combining an upper heat-collecting layer with a lower insulation layer. This allows solar energy to concentrate on heating the solution surface, improving evaporation efficiency and accelerating liquid separation. It is widely used in many production and life fields, including seawater desalination, sewage treatment, and solution regeneration in absorption air conditioning systems.

[0003] The Chinese invention patent application specification "A gear-shaped self-rotating solar interface evaporator and its preparation method" (application number: 202310654363.6, publication date: 2023.07.28) discloses a solar interface evaporator, which includes a water transfer channel and a floating component. The floating component includes a photothermal conversion layer, a hydrophilic evaporation layer and a hydrophobic floating layer. The hydrophilic evaporation layer is placed between the photothermal conversion layer and the hydrophobic floating layer, and the hydrophilic evaporation layer is bonded to the photothermal conversion layer.

[0004] This invention employs a gear-like design for the double-layered structure with interfacial heating. The heat absorption capacity of each gear surface varies significantly, resulting in significant temperature differences after absorbing solar energy. This thermal imbalance causes the entire double-layered floating assembly to rotate. This is achieved by utilizing the Maraghan flow phenomenon to drive the gear-shaped floating assembly's rotation.

[0005] However, the above-mentioned solar interface evaporator utilizes the Maragni flow phenomenon to drive the overall rotation of the gear-shaped floating component. The liquid film in the interface is usually still in a relatively stable state, and the evaporation performance and energy efficiency are not good enough.

[0006] Furthermore, only the Maragni flow phenomenon is used to drive the gear-shaped floating assembly to rotate as a whole. On the one hand, due to the large inertia of the floating assembly itself and on the other hand, the driving force is relatively small, so the floating assembly rotates slowly and the effect of improving the evaporation efficiency is limited.

[0007] In addition, in order to fully utilize the Maraghan flow phenomenon as a driving force, a special and complex process is required to produce a gear-shaped floating component with a special shape and structure, which is not widely promoted and used. Summary of the Invention

[0008] The object of the present invention is to provide a solar interface evaporator with high evaporation efficiency.

[0009] The technical solutions for achieving the purpose of the present invention are:

[0010] A solar interface evaporator comprises a local collector floating in a solution pool; the local collector comprises a transport zone immersed in the solution in the solution pool and a heat collection zone fixed in close contact with the upper portion of the transport zone and with its upper surface higher than the solution level in the solution pool; the heat collection zone is made of a photothermal material having a porous structure; the transport zone is made of a hydrophobic insulating material having multiple bottom-up liquid transport channels; magnetic particles are spread on the upper surface of the heat collection zone; and a driving mechanism is also included that can drive the magnetic particles to move in the liquid film on the upper surface of the heat collection zone.

[0011] Preferably, the driving mechanism includes a vertically loosely fitted rotating shaft passing through the local heat collector, and the lower end of the rotating shaft is coaxially fixedly connected to an output shaft of a motor; a rotating magnetic sheet that can rotate with the rotating shaft is also provided on the rotating shaft between the local heat collector and the motor; a first magnet and a second magnet are respectively fixed at both ends of the rotating magnetic sheet; the polarities of the first magnet and the second magnet are opposite.

[0012] Compared with the prior art, the present invention has the following significant advantages:

[0013] 1. High Evaporation Efficiency: This invention uses a drive mechanism to move magnetic particles in the liquid film on the upper surface of the heat collection area. While the floating local collector remains stationary, the surface liquid film simultaneously receives sunlight and generates movement, thereby improving the evaporation efficiency of the solar interface evaporator. While driving the magnetic particles, the improved solution utilizes rotating blades to impart disturbances within and above the interface liquid film, disrupting its equilibrium and accelerating gas flow. This further enhances heat and mass transfer during the evaporation process, further accelerating the evaporation process and improving evaporation efficiency.

[0014] 2. High solar energy utilization rate: The preferred solution of the present invention not only uses solar heat to heat and evaporate the solution in the heat collection area, but also uses solar photovoltaic panels to provide power for the magnetic particle drive mechanism and rotating blades that enhance heat and mass transfer, greatly improving the utilization efficiency of solar energy.

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an embodiment of a solar interface evaporator according to the present invention.

[0017] In the figure,

[0018] 1 solution tank, 2 electric motors,

[0019] 3 local collectors, 31 transport areas, 311 transport channels, 32 heat collection areas,

[0020] 4 rotating blades, 5 solar photovoltaic panels, 6 rotating shafts, 7 conduits,

[0021] 8 rotating magnetic sheet, 81 substrate, 82 first magnet, 83 second magnet,

[0022] 9 magnetic particles. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, the solar interface evaporator of the present invention includes a local collector 3 floating in a solution pool 1.

[0024] The local heat collector 3 includes a transport area 31 immersed in the solution of the solution pool 1 and a heat collection area 32 fixed in close contact with the upper part of the transport area 31 and with an upper surface higher than the solution surface of the solution pool 1;

[0025] The heat collection area 32 is made of a photothermal material with a porous structure;

[0026] The transport area 31 is made of a hydrophobic insulation material having a plurality of liquid transport channels 311 from bottom to top;

[0027] Magnetic particles 9 are spread on the upper surface of the heat collection area 32 ; and a driving mechanism is also included that can drive the magnetic particles 9 to move in the liquid film on the upper surface of the heat collection area 32 .

[0028] The magnetic particles 9 may be suspended in the liquid film on the upper surface of the heat collection area 32 or may sink to the bottom of the liquid film.

[0029] Preferably, the magnetic particles 9 are suspended in the liquid film on the upper surface of the heat collection area 32. This makes it easier to drive and accelerate the movement of water molecules in the liquid film, thereby improving evaporation efficiency.

[0030] As a preferred solution, Figure 1 As shown,

[0031] The driving mechanism includes a rotating shaft 6 that is loosely fitted vertically through the local heat collector 3, and the lower end of the rotating shaft 6 is coaxially fixedly connected to the output shaft of an electric motor 2;

[0032] A rotating magnetic sheet 8 that can rotate along with the rotating shaft 6 is also provided on the rotating shaft 6 between the local heat collector 3 and the motor 2;

[0033] A first magnet 82 and a second magnet 83 are fixedly provided at both ends of the rotating magnetic sheet 8 ; the polarities of the first magnet 82 and the second magnet 83 are opposite.

[0034] The local collector 3 floats in the solution pool 1, relying on a transport zone 31 made of hydrophobic insulating material. The solution in the solution pool 1 flows through the liquid transport channel 311 and the pore structure of the heat collection zone 32, reaching the upper surface of the heat collection zone 32, forming a liquid film. The heat collection zone 32 converts solar energy into heat, heating the liquid film on the upper surface and causing it to evaporate, thus separating the water from the solution.

[0035] When powered on, the motor 2 rotates the shaft 6, which in turn rotates the rotating magnetic sheet 8. The heat collector 3 remains stable and does not rotate with the shaft 6. The rotation of the rotating magnetic sheet 8 causes the first and second magnets 82, 83, fixed at opposite ends to continuously shift positions. The magnetic particles 9 in the liquid film rotate rapidly as the magnetic pole positions shift. This enhances convective heat and mass transfer, thereby improving evaporation efficiency.

[0036] The present invention drives the magnetic particles in the liquid film on the upper surface of the heat collection area to move through a driving mechanism. When the floating local heat collector remains stationary as a whole, the surface liquid film moves while receiving heat from sunlight, thereby improving the evaporation efficiency of the solar interface evaporator.

[0037] As an improved solution, the upper end of the rotating shaft 6 is fixedly connected to a rotating blade 4 , and the rotating blade 4 can rotate along with the rotating shaft 6 close to the upper surface of the heat collection area 32 .

[0038] The rotating blades 4 can rotate above the liquid film on the upper surface of the heat collection area 32, or their lower surfaces can be in contact with the liquid film.

[0039] Preferably, the lower surface of the rotating blade 4 is in contact with the liquid film on the upper surface of the heat collection area 32 .

[0040] This improved solution not only drives the magnetic particles to move, but also uses rotating blades to impose disturbances in and above the interface liquid film, thereby destroying the balance of the interface liquid film, accelerating the gas flow, and further strengthening the heat and mass transfer processes of the evaporation process, thereby further accelerating the evaporation process and improving the evaporation efficiency.

[0041] As a further improvement, the solar interface evaporator of the present invention further comprises a solar photovoltaic panel 5 placed on the upper portion of the local heat collector 3;

[0042] The solar photovoltaic panel 5 is electrically connected to the motor 2. The solar photovoltaic panel 5 is used to provide power to the motor 2.

[0043] Preferably, it also includes a rigid conduit 7, which vertically passes through the local collector 3 and is fixedly connected to the local collector 3; the upper end of the conduit 7 is fixedly connected to the solar photovoltaic panel 5, and the lower end is sealedly connected to the wiring port of the motor 2; the connecting wires between the solar photovoltaic panel 5 and the motor 2 pass through the conduit 7.

[0044] This improved solution not only uses solar heat to heat the interface of the solution in the heat collection area to make it evaporate quickly, but also uses photovoltaics to drive the electric motor to enhance the mass and heat transfer of the evaporation process. At the same time, solar energy is converted into heat energy and electrical energy, which jointly drive the evaporation process, maximizing the use of solar energy and greatly improving the efficiency of solar energy utilization.

Claims

1. A solar interface evaporator comprising a local heat collector (3) floating in a solution pool (1); The local heat collector (3) comprises a transport area (31) immersed in the solution of the solution pool (1) and a heat collection area (32) fixed in close contact with the upper part of the transport area (31) and with an upper surface higher than the solution surface of the solution pool (1); The heat collection area (32) is made of a photothermal material with a porous structure; The transport area (31) is made of a hydrophobic heat-insulating material having a plurality of liquid transport channels (311) extending from bottom to top; Magnetic particles (9) are spread on the upper surface of the heat collection area (32); It also includes a driving mechanism capable of driving the magnetic particles (9) to move in the liquid film on the upper surface of the heat collection area (32); The driving mechanism comprises a rotating shaft (6) that is loosely fitted vertically through the local heat collector (3), and the lower end of the rotating shaft (6) is coaxially fixedly connected to an output shaft of a motor (2); A rotating magnetic sheet (8) that can rotate along with the rotating shaft (6) is also provided on the rotating shaft (6) between the local heat collector (3) and the motor (2); A first magnet (82) and a second magnet (83) are fixedly provided at both ends of the rotating magnetic sheet (8); the polarities of the first magnet (82) and the second magnet (83) are opposite; Its characteristics are: The magnetic particles (9) are suspended in a liquid film on the upper surface of the heat collection area (32); The upper end of the rotating shaft (6) is fixedly connected to a rotating blade (4), and the rotating blade (4) can rotate along the rotating shaft (6) close to the upper surface of the heat collection area (32); The lower surface of the rotating blade (4) is in contact with the liquid film on the upper surface of the heat collection area (32).

2. The solar interface evaporator according to claim 1, characterized in that: It also includes a solar photovoltaic panel (5) placed on the upper part of the local heat collector (3); The solar photovoltaic panel (5) is electrically connected to the electric motor (2).

3. The solar interface evaporator according to claim 2, characterized in that: It also includes a rigid conduit (7) that vertically passes through the local heat collector (3) and is fixedly connected to the local heat collector (3); the upper end of the conduit (7) is fixedly connected to the solar photovoltaic panel (5), and the lower end is sealedly connected to the connection port of the motor (2); the connecting wire between the solar photovoltaic panel (5) and the motor (2) passes through the conduit (7).

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