Solar evaporator

Abstract

A solar evaporator comprises a heat insulation floating block, a plurality of water delivery rods with the water absorption characteristic are perpendicularly arranged on the heat insulation floating block in a penetrating mode, each water delivery rod comprises a water absorption part located below the heat insulation floating block and an evaporation part located above the heat insulation floating block, and the water absorption parts are immersed into a water source to be treated. Hydrophilic photothermal conversion coatings are arranged on the upper surface of the heat insulation floating block and the outer surface of the evaporation part. The water conveying rod forms a water conveying channel, water can be rapidly conveyed to the surface of the evaporator from the bottom of the evaporator, light energy can be efficiently converted into heat energy through the photo-thermal conversion characteristic of the photo-thermal conversion coating, the temperature of the surface of the evaporator is rapidly increased, efficient absorption of solar energy and rapid evaporation of water are achieved, and the device is simple and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of solar energy evaporation, in particular to a solar energy evaporator. Background Art

[0002] Water is the source of life, but currently there are only 2.8% of fresh water resources on the earth, and only 0.34% of fresh water resources are available to humans. With the development of human society in recent years, the shortage of fresh water resources has intensified. Compared with fresh water resources, seawater resources account for as high as 97.2%. Therefore, how to efficiently and cleanly utilize seawater resources and convert seawater into usable fresh water has become one of the important issues today. As an abundant and sustainable energy source, solar energy plays an important role in low-energy fresh water production.

[0003] At present, the technical methods for desalination of seawater include solar energy, distillation, reverse osmosis, etc. Among them, solar evaporators have the advantages of low carbon, environmental protection, no consumption of conventional energy, and high purity of fresh water in seawater desalination. At this stage, solar desalination of seawater generally studies seawater desalination from two aspects: photovoltaic and photothermal. The former mainly uses solar photovoltaic power generation, and then uses electricity to drive high-pressure water pumps to compress seawater for reverse osmosis to complete seawater desalination. This method usually requires complex equipment, high cost, and difficult engineering application; the latter is to develop and prepare new photothermal materials and evaporators with high solar thermal conversion efficiency for seawater desalination. It is a simple and easy means of seawater desalination, but the existing seawater evaporator has a low efficiency in utilizing light energy due to its structural design, resulting in unsatisfactory water evaporation efficiency. Utility Model Content

[0004] In view of the shortcomings of the background technology, the purpose of the utility model is to provide a solar evaporator.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A solar evaporator comprises a thermal insulation floating block, wherein a plurality of water delivery rods with water absorption characteristics are vertically penetrated through the thermal insulation floating block, each of the water delivery rods comprises a water absorption part located below the thermal insulation floating block and an evaporation part located above the thermal insulation floating block, the water absorption part is immersed in a water source to be treated, and the upper surface of the thermal insulation floating block and the outer surface of the evaporation part are both provided with a hydrophilic light-to-heat conversion coating.

[0007] Furthermore, the insulation floating block has a thickness of 5 mm to 25 mm and a density of less than 1000 kg / m 3 The material of the heat-insulating floating block is selected from one of silicone rubber foam, polyethylene foam or polystyrene foam.

[0008] Furthermore, the heat-insulating floating block is provided with 500 to 10,000 water delivery rods distributed equidistantly per square meter.

[0009] Furthermore, the water delivery rod is a spandex water absorbent rod or a water absorbent cotton swab.

[0010] Furthermore, the height of the evaporation portion is 5 to 25 mm.

[0011] Furthermore, the height of the water absorbing part is 3 to 20 mm.

[0012] Furthermore, it also includes a condensation water collection device, which includes a water collection tank connected to the four sides of the insulating floating block, a light-transmitting top cover extending upward from the water collection tank and located above each of the water delivery rods, and the water collection tank is provided with a water outlet for connecting to an external water outlet pipe.

[0013] Furthermore, the light-transmitting top cover is made of polypropylene material with a thickness of 0.5-1 mm.

[0014] Furthermore, a plurality of guide portions are provided on the inner surface of the light-transmitting top cover.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model proposes a solar evaporator, including a heat-insulating floating block, wherein a plurality of water delivery rods with water absorption characteristics are vertically penetrated through the heat-insulating floating block, each water delivery rod includes a water absorption part located below the heat-insulating floating block and an evaporation part located above the heat-insulating floating block, the water absorption part is immersed in a water source to be treated, and the upper surface of the heat-insulating floating block and the outer surface of the evaporation part are both provided with a hydrophilic photothermal conversion coating. The water delivery rods of the utility model constitute a water transmission channel, so that water can be quickly transmitted from the bottom of the evaporator to the surface of the evaporator. The photothermal conversion characteristics of the photothermal conversion coating can efficiently convert light energy into heat energy, so that the temperature of the evaporator surface rises rapidly, and efficient absorption of solar energy and rapid evaporation of water are achieved. The device is simple and the manufacturing cost is low.

[0017] 2. The utility model proposes a solar evaporator, and the design of the insulating floating block can isolate the high temperature obtained by surface solar energy conversion from the water source to be treated at the bottom. Combined with the design of the water transmission channel, the surface high temperature obtained by light-heat conversion only acts on the upper surface of the insulating floating block and the outer surface of the evaporation part, avoiding the rapid dissipation of surface heat caused by direct contact with the bottom water source.

[0018] 3. The utility model proposes a solar evaporator in which a plurality of water delivery rods are vertically inserted into the heat-insulating floating blocks, converting the traditional two-dimensional plane into a three-dimensional forest structure, thereby greatly increasing the effective contact area between sunlight and the evaporator surface. The water evaporation process occurs on the sunlight contact surface, and the increase in contact area can effectively improve the evaporation efficiency of water. Therefore, it has more advantages than traditional solar evaporators.

[0019] 4. The solar evaporator proposed in the utility model not only utilizes the photothermal conversion characteristics of the photothermal conversion coating to make the device have good evaporation efficiency, but also can be widely used in the field of seawater desalination due to its advantages of low cost and simple process, thus solving the shortcomings of traditional solar evaporators such as complex preparation and high cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of a solar evaporator of the utility model;

[0022] Figure 2 This is an exploded view of a solar evaporator of the utility model;

[0023] Figure 3 is a schematic diagram of a thermal insulation floating block;

[0024] Figure 4 is a schematic diagram of the inner surface of the light-transmitting top cover;

[0025] In the figure, 10, thermal insulation floating block; 20, water delivery rod; 201, water absorption part; 202, evaporation part; 30, photothermal conversion coating; 401, water collecting tank; 402, light-transmitting top cover; 403, guide part; 404, water outlet. DETAILED DESCRIPTION

[0026] Combine the following Figure 1-4 The utility model is described in detail.

[0027] A solar evaporator includes a heat-insulating floating block 10, and a plurality of water delivery rods 20 with water absorption characteristics are vertically penetrated through the heat-insulating floating block 10. Each water delivery rod 20 includes a water absorption part 201 located below the heat-insulating floating block 10 and an evaporation part 202 located above the heat-insulating floating block 10. The water absorption part 201 is immersed in the water source to be treated. The upper surface of the heat-insulating floating block 10 and the outer surface of the evaporation part 202 are both provided with a hydrophilic photothermal conversion coating 30. The water delivery rod 20 constitutes a water transmission channel, so that water can be quickly transmitted from the bottom of the evaporator to the surface of the evaporator. The photothermal conversion characteristics of the photothermal conversion coating 30 can efficiently convert light energy into heat energy, so that the surface of the evaporator quickly rises in temperature, and efficient absorption of solar energy and rapid evaporation of water are achieved. The device is simple and the manufacturing cost is low. Specifically, the heat-insulating floating block 10 is provided with a plurality of holes with a diameter of 6 mm, and each water delivery rod 20 is vertically penetrated in each hole and fixed therein.

[0028] In this embodiment, the insulation floating block 10 has a thickness of 5 mm to 25 mm and a density of less than 1000 kg / m 3 The material of the heat-insulating floating block 10 is selected from one of silicone rubber foam, polyethylene foam or polystyrene foam. Specifically, the heat-insulating floating block 10 is a cylindrical polystyrene foam board with a diameter of 80 mm and a thickness of 10 mm; or, the light-heat conversion coating 30 can also be arranged on the side surface of the heat-insulating floating block 10, and a slope is arranged between the upper surface and the lower surface of the heat-insulating floating block 10, and the upper surface area is smaller than the lower surface area, that is, a truncated cone-shaped polystyrene foam board is selected, so that the side surface of the heat-insulating floating block 10 can also evaporate water quickly.

[0029] In this embodiment, 500 to 10,000 equally spaced water delivery rods 20 are provided per square meter of the heat-insulating floating block 10. Specifically, 4,500 equally spaced water delivery rods 20 are provided per square meter of the heat-insulating floating block 10.

[0030] In this embodiment, the water delivery rod 20 is a spandex water absorption rod or a water absorption cotton swab. Specifically, the water delivery rod 20 is a spandex water absorption rod, which serves as a water transmission channel. The water delivery rod 20 can also be made of other common materials and structures in the prior art of the present invention.

[0031] In this embodiment, the height of the evaporation part 202 is 5 to 25 mm; further, the height of the water absorption part 201 is 3 to 20 mm. Specifically, the total length of each water delivery rod 20 is 24 mm, of which 10 mm is used to penetrate the heat insulation floating block 10, the height of the evaporation part 202, that is, the height of the water delivery rod 20 protruding from the upper surface of the heat insulation floating block 10, is 10 mm, and the height of the water absorption part 201 is 4 mm.

[0032] In this embodiment, a condensation water collection device is also included, and the condensation water collection device includes a water collection tank 401 connected to the four sides of the heat-insulating floating block 10, and a light-transmitting top cover 402 located above each water delivery rod 20 extends upward from the water collection tank 401, and the water collection tank 401 is provided with a water outlet 404 for connecting to an external water outlet pipe; further, the light-transmitting top cover 402 is made of polypropylene material with a thickness of 0.5-1mm; and a plurality of guide portions 403 are provided on the inner surface of the light-transmitting top cover 402. Specifically, the water collection tank 401 includes an inner edge and an outer edge, and the outer wall of the bottom of the light-transmitting top cover 402 is bonded to the inner wall of the outer edge of the water collection tank 401, and the guide portion 403 is a raised portion. The condensation water collection device can also use a water collection device commonly used in the prior art, which will not be described here.

[0033] The working principle of a solar evaporator proposed in the utility model is as follows:

[0034] The heat-insulating floating block 10 is floated on the sea surface or the water surface in the container, and the water-absorbing parts 201 of the water-transporting rods 20 with water-absorbing properties begin to absorb water and transport the water upward. Since the upper surface of the heat-insulating floating block 10 and the outer surface of the evaporation part 202 are both provided with a hydrophilic light-heat conversion coating 30, part of the water spreads on the upper surface of the heat-insulating floating block 10, and part of the water continues to be transported upward to the evaporation part 202. Under the action of the light-heat conversion coating 30, solar energy is converted into heat energy, and the water evaporates quickly.

[0035] The evaporated water vapor contacts the inner surface of the light-transmitting top cover 402 upwards. Due to the temperature difference, the water vapor turns into liquid again on the inner surface of the light-transmitting top cover 402 and flows along the guide part 403 to the water collection tank 401 as desalinated water, and flows out through the water outlet 404.

[0036] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A solar evaporator, characterized in that: It comprises a thermal insulation floating block, wherein a plurality of water delivery rods with water absorption characteristics are vertically penetrated through the thermal insulation floating block, each of the water delivery rods comprises a water absorption part located below the thermal insulation floating block and an evaporation part located above the thermal insulation floating block, the water absorption part is immersed in a water source to be treated, and the upper surface of the thermal insulation floating block and the outer surface of the evaporation part are both provided with a hydrophilic photothermal conversion coating.

2. A solar evaporator as claimed in claim 1, characterized in that: The insulation floating block has a thickness of 5 mm to 25 mm and a density of less than 1000 kg / m 3 The material of the heat-insulating floating block is selected from one of silicone rubber foam, polyethylene foam or polystyrene foam.

3. A solar evaporator according to claim 1, characterized in that: The heat-insulating floating block is provided with 500 to 10,000 water delivery rods which are evenly distributed per square meter.

4. A solar evaporator as claimed in claim 1, characterized in that: The water delivery rod is a spandex water absorption rod or a water absorption cotton swab.

5. A solar evaporator as claimed in claim 1, characterized in that: The height of the evaporation portion is 5 to 25 mm.

6. A solar evaporator as claimed in claim 5, characterized in that: The height of the water absorbing part is 3 to 20 mm.

7. A solar evaporator as claimed in claim 1, characterized in that: It also includes a condensation water collection device, which includes a water collection tank connected to the four sides of the insulation floating block, a light-transmitting top cover extending upward from the water collection tank and located above each of the water delivery rods, and the water collection tank is provided with a water outlet for connecting to an external water outlet pipe.

8. A solar evaporator as claimed in claim 7, characterized in that: The light-transmitting top cover is made of polypropylene material and has a thickness of 0.5-1 mm.

9. A solar evaporator as claimed in claim 7, characterized in that: The inner surface of the light-transmitting top cover is provided with a plurality of guide parts.

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