CN212198577U - Photo-thermal interface evaporation structure based on capillary fiber woven water supply - Google Patents
Photo-thermal interface evaporation structure based on capillary fiber woven water supply Download PDFInfo
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- CN212198577U CN212198577U CN202020703036.7U CN202020703036U CN212198577U CN 212198577 U CN212198577 U CN 212198577U CN 202020703036 U CN202020703036 U CN 202020703036U CN 212198577 U CN212198577 U CN 212198577U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to a photothermal interface evaporation structure based on capillary fiber woven water supply, which comprises a water source, a heat insulation material, a capillary fiber network, a photothermal conversion material and a light source; the heat insulation material is fixed or floats above the water source, the capillary fibers penetrate through the heat insulation material to be woven to form a capillary fiber network, the lower end of the capillary fiber network is contacted with the water source, the upper end of the capillary fiber network is contacted with the photothermal conversion material, and the light source is arranged above the photothermal conversion material; liquid in the water source enters the evaporation interface of the photothermal conversion material through the capillary fiber network and is evaporated under the irradiation of the light source. The utility model has the advantages that: the utility model discloses with the capillary fibre through the mode of weaving, during the embedding thermal insulation material, form three-dimensional capillary water guide network from top to bottom at thermal insulation material, for the light and heat conversion material supplies water, realize good water absorption and thermal-insulated effect simultaneously, realize efficient light-thermal interface evaporation, obtain higher solar energy utilization efficiency.
Description
Technical Field
The utility model relates to a sea water desalination, light and heat evaporation field especially relate to a light and heat interface evaporation structure based on water supply is woven to capillary fibre.
Background
The solar seawater desalination thermal method technology mainly utilizes solar photo-thermal resources to heat seawater, phase change evaporation is carried out on the seawater, and fresh water is obtained through condensation and collection. The photo-thermal solar seawater desalination technology has the advantages of high efficiency, low cost, simple maintenance and the like, and is the mainstream solar seawater desalination technology at present. In the traditional seawater desalination or solar distiller adopting multilevel evaporation and other thermal methods, a heat absorbing medium comprises seawater and a substrate, so that water in an evaporation part is heated, and finally discharged concentrated water is heated. Although the heated concentrated water can be subjected to heat recovery through a heat exchanger or the water body is preheated by using latent heat of condensation in a large-scale seawater desalination facility, the problem of heat loss of the concentrated water is inevitable; in a small-sized seawater desalination plant, the heat loss ratio brought by directly discharging concentrated water is almost equivalent to the concentrated water-evaporation flow ratio. The interface evaporation method is that light absorbing material is arranged at the interface between sea water and air, the thin liquid layer at the interface is heated to evaporate the light absorbing material, and the sea water is continuously absorbed to the heating interface by the water absorbing core or the floating water absorbing material, so that the photo-thermal evaporation process is continuously carried out. The heating mode effectively applies the heat energy converted from sunlight to the thin liquid layer at the interface, and can greatly reduce the heat loss in the evaporation process, thereby improving the evaporation temperature and efficiency. The relevant documents are: zhang Xuan radium, Bo Yuan and Liu Qiang in electric power science and engineering, 2017,33(12):1-8, published "New technical development State of solar seawater desalination" [ J ]; solar-drive interface evaluation, published in Nat Energy 3, 1031-1041 (2018), by Tao, P., Ni, G, Song, C.
The main characteristic and advantage of the light-heat interface evaporation technology is that the heat loss in the evaporation heating process is reduced, and particularly the heat leakage loss to seawater is reduced. The technology therefore requires separating the photo-thermal material from the seawater by an insulating material, drawing water from the seawater to the heating interface with as small an area of water conducting channel as possible. However, this technique also requires a comprehensive balance of the water supply-heat loss relationship: if the area of the water guide channel is too small or the water guide efficiency is not high, although the heat leakage loss of the photo-thermal material can be reduced, the evaporation interface is not supplied with water sufficiently, the photo-thermal evaporation efficiency is reduced, a serious salt accumulation phenomenon is caused, the light receiving area is reduced, and the photo-thermal evaporation efficiency is further reduced. The prior art adopts cotton cloth, gauze and other fiber cloth as a water absorption unit, and has the defects of low water absorption efficiency, high heat loss rate, uncontrollable water absorption channel area adjustment and the like. The relevant documents are: ni, G., Zandavi, SH., et al, Energy environ, Sci, 2018,11,1510-1519, A salt-rejection floor stand for low-cost depletion, published.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the prior art, providing a light and heat interface evaporation structure based on capillary fibre weaves water supply, with the mode of capillary fibre through weaving, imbed in the thermal insulation material, form three-dimensional capillary water guide network from top to bottom at thermal insulation material, for light and heat conversion material supplies water, realize the evaporation of solar energy light and heat interface.
The photothermal interface evaporation structure based on capillary fiber woven water supply comprises a water source, a heat insulation material, a capillary fiber network, a photothermal conversion material and a light source; the heat insulation material is fixed or floats above a water source, the capillary fibers penetrate through the heat insulation material to be woven to form a capillary fiber network (namely a three-dimensional water guide network), the lower end of the capillary fiber network is contacted with the water source, the upper end of the capillary fiber network is contacted with the photothermal conversion material, and a light source is arranged above the photothermal conversion material; liquid in the water source enters the evaporation interface of the photothermal conversion material through the capillary fiber network and is evaporated under the irradiation of the light source.
Preferably, the method comprises the following steps: the water source comprises seawater free of suspended particulate matter, fresh water, non-corrosive industrial waste water or non-corrosive organic reagents.
Preferably, the method comprises the following steps: the heat insulating material comprises polystyrene with the thermal conductivity coefficient less than or equal to 0.1W/(m.K), polyurethane hydrophobic white foam or aerosol; the thickness of the heat insulation material is 1-6 cm.
Preferably, the method comprises the following steps: the capillary fiber comprises natural fiber bundles such as cotton, hemp, wool and silk with wetting capillary performance, chemical fibers such as nylon and glass fiber or blended fibers; the capillary fibers are woven up and down through the insulation material to form vertical and horizontal three-dimensional networks.
Preferably, the method comprises the following steps: the photothermal conversion material comprises single-layer or multi-layer black dyed fiber cloth with the light absorption rate of more than or equal to 80 percent, carbon-based material deposition cloth such as activated carbon, graphene and carbon nano tubes, plasma deposition cloth such as nano gold and silver, and carbon-based material blending gel.
Preferably, the method comprises the following steps: the light source comprises simulated sunlight, sunlight under natural conditions or concentrated sunlight obtained by a light concentrating device, and the illumination area range of the light source is larger than that of the photothermal interface evaporation area.
The utility model has the advantages that: the utility model discloses with the capillary fibre through the mode of weaving, during the embedding thermal insulation material, form three-dimensional capillary water guide network from top to bottom at thermal insulation material, for the light and heat conversion material supplies water, realize good water absorption and thermal-insulated effect simultaneously, realize efficient light-thermal interface evaporation, obtain higher solar energy utilization efficiency.
Drawings
FIG. 1 is a schematic view of a photothermal interface evaporation structure based on capillary fiber woven water supply;
FIG. 2 is a schematic view of a capillary fiber weave structure;
fig. 3 is a schematic view of a photothermal interface evaporation process based on capillary fiber woven water supply.
Description of reference numerals: the device comprises a water source 1, a heat insulation material 2, a capillary fiber network 3, a photothermal conversion material 4 and a light source 5.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
The utility model discloses use as the water guide passageway in the capillary fibre embedding thermal insulation material to utilize the method of weaving to weave into three-dimensional water guide structure with vertical water guide fibre and horizontal water guide fibre, can utilize "capillary phenomenon" to realize good effect of drawing water, realize that efficient three-dimensional network supplies water, have higher water guide efficiency and relatively lower heat loss rate on unit area, have more accurate simple water supply-the balanced regulation performance of heat loss, hopefully be applied to in the light-thermal interface evaporation technique, obtain higher solar energy utilization efficiency.
As shown in fig. 1, the photothermal interface evaporation structure based on capillary fiber woven water supply comprises an insulation foam floating above seawater and having low thermal conductivity, a capillary fiber network 3 is embedded in the insulation foam, the lower end of the capillary fiber network 3 contacts the seawater, the upper end of the capillary fiber network 3 contacts with a photothermal conversion material 4, the seawater passes through the insulation foam through a capillary fiber network vertical channel, diffuses in a capillary fiber network horizontal channel and enters a photothermal conversion material evaporation interface, and is evaporated under sunlight irradiation.
The heat insulation foam is as follows: extruded polystyrene foam boards (XPS) having a density of 30kg/m3The thermal conductivity is 0.03W/mK, and the thickness is 1 to 2 cm.
The capillary fiber network is: as shown in FIG. 2, the capillary fiber network 3 comprises cotton threads having hydrophilic wetting wicking properties woven up and down through the insulation material 2 at 0.2cm intervals to form a vertical and horizontal three-dimensional network.
The photothermal conversion material is: the absorbance in the solar spectral range of the activated carbon-deposited fiber cotton cloth with a diameter of 4.6cm circular was 93%.
The weaving mode of the capillary fibers is as follows: as shown in figure 2, according to the horizontal capillary fiber network configuration design of 0.2cm cross spacing, a single-thread plain stitch method is adopted for carrying out reciprocating knitting, black cotton threads of 0.5mm vertically penetrate through heat insulation foam, and a three-dimensional fiber network structure is formed above and below the heat insulation foam.
The flow of photo-thermal interface evaporation based on capillary fiber woven water supply comprises the following steps: as shown in fig. 3, seawater infiltrates the bottom of the capillary fiber network 3, is vertically drawn to the upper part of the capillary fiber network 3, and is diffused to the whole evaporation interface through the capillary channels in the capillary fiber horizontal network; the photothermal conversion material 4 in the evaporation interface converts the absorbed sunlight into heat, heats the seawater adsorbed in the material, and heats and evaporates it.
Examples of photothermal interface evaporation based on capillary fiber woven water supply are as follows: cutting a circular extruded polystyrene foam board heat-insulating material with the diameter of 4.6cm and the thickness of 2cm by using a die, and weaving a black cotton thread three-dimensional water supply network in a reciprocating manner in the middle of foam according to a cross pattern shown in figure 2 at an interval of 0.2cm by adopting a manual single-thread plain stitch method; the lower part of the cotton three-dimensional water supply network is contacted with seawater with the salt content of 3.5 percent, water is transported to active carbon deposition fiber cotton cloth with the diameter of 4.6cm, and sunlight is absorbed on the surface of the active carbon deposition fiber cotton cloth to heat water so as to realize interface evaporation; the experimental result shows that the concentration is 1kW/m2Under the standard sunlight irradiation condition, the evaporation rate of the activated carbon deposition cellucotton cloth material is1.3kg/m2*h。
Claims (6)
1. The utility model provides a light and heat interface evaporation structure based on water supply is woven to capillary fibre which characterized in that: comprises a water source (1), a heat insulation material (2), a capillary fiber network (3), a photo-thermal conversion material (4) and a light source (5); the heat insulation material (2) is fixed or floats above the water source (1), the capillary fibers penetrate through the heat insulation material (2) to be woven to form a capillary fiber network (3), the lower end of the capillary fiber network (3) is in contact with the water source (1), the upper end of the capillary fiber network (3) is in contact with the photothermal conversion material (4), and the light source (5) is arranged above the photothermal conversion material (4).
2. The photothermal interface evaporation structure based on capillary fiber woven water supply according to claim 1, wherein: the water source (1) comprises seawater free of suspended particulate matter, fresh water, non-corrosive industrial waste water or non-corrosive organic reagents.
3. The photothermal interface evaporation structure based on capillary fiber woven water supply according to claim 1, wherein: the heat insulation material (2) comprises polystyrene, polyurethane hydrophobic white foam or aerosol; the thickness of the heat insulation material (2) is 1-6 cm.
4. The photothermal interface evaporation structure based on capillary fiber woven water supply according to claim 1, wherein: the capillary fiber comprises natural fiber bundle, nylon, chemical fiber or blended fiber with wetting and capillary properties; the capillary fibers are woven up and down through the insulating material (2) to form a vertical and horizontal three-dimensional network.
5. The photothermal interface evaporation structure based on capillary fiber woven water supply according to claim 1, wherein: the photothermal conversion material (4) comprises single-layer or multi-layer black dyeing fiber cloth with the light absorption rate of more than or equal to 80%, carbon-based material deposition cloth, plasma deposition cloth or carbon-based material blending gel.
6. The photothermal interface evaporation structure based on capillary fiber woven water supply according to claim 1, wherein: the light source (5) comprises simulated sunlight, sunlight under natural conditions or concentrated sunlight obtained by a light-concentrating device, and the illumination area range of the light source is larger than that of the photothermal interface evaporation area.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111439803A (en) * | 2020-04-30 | 2020-07-24 | 浙江浙能技术研究院有限公司 | Photo-thermal interface evaporation structure and method based on capillary fiber woven water supply |
| CN113428923A (en) * | 2021-06-17 | 2021-09-24 | 河海大学 | Solar interface evaporation structure and preparation method thereof |
| CN114506892A (en) * | 2022-02-18 | 2022-05-17 | 天津海特热管理科技有限公司 | Photo-thermal interface evaporator and preparation method and application thereof |
| CN115180674A (en) * | 2022-06-16 | 2022-10-14 | 武汉纺织大学 | Device for efficiently treating strong brine, preparation method and application |
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2020
- 2020-04-30 CN CN202020703036.7U patent/CN212198577U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111439803A (en) * | 2020-04-30 | 2020-07-24 | 浙江浙能技术研究院有限公司 | Photo-thermal interface evaporation structure and method based on capillary fiber woven water supply |
| CN113428923A (en) * | 2021-06-17 | 2021-09-24 | 河海大学 | Solar interface evaporation structure and preparation method thereof |
| CN114506892A (en) * | 2022-02-18 | 2022-05-17 | 天津海特热管理科技有限公司 | Photo-thermal interface evaporator and preparation method and application thereof |
| CN115180674A (en) * | 2022-06-16 | 2022-10-14 | 武汉纺织大学 | Device for efficiently treating strong brine, preparation method and application |
| CN115180674B (en) * | 2022-06-16 | 2023-10-31 | 武汉纺织大学 | Device for efficiently treating strong brine, preparation method and application |
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