阅读说明：本技术 一种基于界面光热转换的双面太阳能蒸汽装置及其制备方法 (Double-sided solar steam device based on interface photo-thermal conversion and preparation method thereof ) 是由 王贤保 张骞 梅涛 *** 王建颖 钱静雯 余黎 于 2019-10-22 设计创作，主要内容包括：本发明涉及光热蒸发技术领域,尤其涉及一种基于界面光热转换的双面太阳能蒸汽装置及其制备方法。本发明提供的基于界面光热转换的双面太阳能蒸汽装置采用泡沫层作为所述装置的支撑层和绝热层,所述涤纶长丝柱为输水通道,当太阳光照射到亲水吸光层时,由于所述亲水吸光层在垂直方向上的高导热性,吸收太阳光产生的热量迅速传递到下表面,实现吸光层上下两面的同时蒸发,提高所述装置对太阳能的利用率和蒸汽产生速率；同时,涤纶柱作为输水通道,能够及时给亲水性吸光层供给所需要蒸发的水分,实现长时间稳定的光热蒸发,且所述涤纶长丝具有极好的化学稳定性,使得所述装置可以用于极端环境(如,强酸或强碱等污水的处理)。(The invention relates to the technical field of photo-thermal evaporation, in particular to a double-sided solar steam device based on interface photo-thermal conversion and a preparation method thereof. The double-sided solar steam device based on interface photothermal conversion provided by the invention adopts the foam layer as the supporting layer and the heat insulating layer of the device, the polyester filament column is the water delivery channel, when sunlight irradiates the hydrophilic light absorption layer, because of the high thermal conductivity of the hydrophilic light absorption layer in the vertical direction, the heat generated by the absorbed sunlight is rapidly transferred to the lower surface, the simultaneous evaporation of the upper surface and the lower surface of the light absorption layer is realized, and the utilization rate of the device to solar energy and the steam generation rate are improved; simultaneously, the dacron post is as water delivery passageway, can in time give required evaporation moisture of hydrophilicity light-absorbing layer supply, realizes long-time stable light and heat evaporation, just dacron filament has fabulous chemical stability, makes the device can be used for extreme environment (e.g., the processing of sewage such as strong acid or alkali).)

1. A double-sided solar steam device based on interface photo-thermal conversion is characterized by comprising a hydrophilic light absorption layer, polyester filament columns and a foam layer which are sequentially arranged from top to bottom;

and two ends of the polyester filament column in the axial direction are respectively connected with the hydrophilic light absorption layer and the foam layer.

2. The interfacial photothermal conversion based bifacial solar steam device of claim 1 wherein said polyester filament column is comprised of polyester filaments;

the diameter of the polyester filament column is 5-6 mm; the diameter of the polyester filament yarn is 15-25 mu m.

3. The interface photothermal conversion based double-sided solar steam device according to claim 1 or 2, wherein one end of the polyester filament column in the axial direction is vertically embedded in the foam layer and is in accordance with the bottom level of the foam layer.

4. The interfacial photothermal conversion based bifacial solar steam device as recited in claim 3, wherein the perpendicular distance between the other end of said polyester filament column in the axial direction and the top of said foam layer is 1-3 cm.

5. The interfacial photothermal conversion based bifacial solar vapor device of claim 1,

the thickness of the hydrophilic light absorption layer is 0.2-1 mm;

the hydrophilic light absorption layer is an activated carbon-cotton fabric layer;

the mass ratio of the activated carbon to the cotton fabric is 1: (20-30).

6. The double-sided solar steam device based on interfacial photothermal conversion according to claim 5, wherein the preparation method of the activated carbon-cotton fabric comprises the following steps:

and mixing the cotton fabric with the active carbon dispersion liquid, and impregnating to obtain the active carbon-cotton fabric.

7. The interfacial photothermal conversion based bifacial solar steam device as described in claim 6, wherein the ratio of the mass of the activated carbon in said activated carbon dispersion to the volume of the dispersing agent is 1 g: (100-200) mL.

8. The interfacial photothermal conversion based bifacial solar steam device of claim 6 wherein said immersion is under agitated conditions;

the dipping time is 1-2 h; the dipping times are 5-6 times.

9. The interfacial photothermal conversion based bifacial solar steam device of claim 1 wherein said foam layer is made of expanded polystyrene, polyurethane or polyethylene;

the thickness of the foam layer is 2-3 cm.

10. The method for preparing the double-sided solar steam device based on the interfacial photothermal conversion according to any one of claims 1 to 9, comprising the following steps:

perforating the foam layer;

embedding one end of the polyester filament yarn column in the axial direction into the hole, and placing a hydrophilic light absorption layer on the other end;

the holes are communicated holes, and the distance between every two adjacent holes is 1-2 cm.

Technical Field

The invention relates to the technical field of photo-thermal evaporation, in particular to a double-sided solar steam device based on interface photo-thermal conversion and a preparation method thereof.

Background

With the development of the industrialized society, the world faces serious environmental pollution and energy shortage, and researches on how to efficiently utilize clean and low-cost renewable energy are urgently needed to explore and solve the problem. Currently, the renewable energy sources that can be utilized mainly include wind energy, solar energy, tidal energy, geothermal energy, and the like. Among them, solar energy is a promising energy source and can be applied in many fields such as hydrogen production, power generation, photovoltaic cells, photocatalysis, water purification, and seawater desalination. Solar steam technology is a basic way of utilizing solar energy and can be used for power generation, medical sterilization or disinfection, fresh water production, and the like. Early use of solar energy was primarily demonstrated in conventional concentrated solar systems, with the steam produced primarily for electricity generation.

At present, a solar interface steam generation technology for realizing surface local steam generation by using nano plasma or black light absorption materials as light absorption materials gradually draws attention. However, the steam yield of the existing solar interface steam technology is still very low, and the industrial production requirements cannot be met.

Disclosure of Invention

The invention aims to provide a double-sided solar steam device based on interface photothermal conversion and a preparation method thereof, wherein the double-sided solar steam device based on the interface photothermal conversion has higher evaporation rate, namely higher steam yield in the same time.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides a double-sided solar steam device based on interface photothermal conversion, which comprises a hydrophilic light absorption layer, polyester filament columns and a foam layer, wherein the hydrophilic light absorption layer, the polyester filament columns and the foam layer are sequentially arranged from top to bottom;

and two ends of the polyester filament column in the axial direction are respectively connected with the hydrophilic light absorption layer and the foam layer.

Preferably, the polyester filament column is made of polyester filaments;

the diameter of the polyester filament column is 5-6 mm; the diameter of the polyester filament yarn is 15-25 mu m.

Preferably, one end of the polyester filament column in the axial direction is vertically embedded into the foam layer and is consistent with the bottom horizontal height of the foam layer.

Preferably, the vertical distance between the other end of the polyester filament column in the axial direction and the top of the foam layer is 1-3 cm.

Preferably, the thickness of the hydrophilic light absorption layer is 0.2-1 mm;

the hydrophilic light absorption layer is an activated carbon-cotton fabric layer;

the mass ratio of the activated carbon to the cotton fabric is 1: (20-30).

Preferably, the preparation method of the activated carbon-cotton fabric comprises the following steps:

and mixing the cotton fabric with the active carbon dispersion liquid, and impregnating to obtain the active carbon-cotton fabric.

Preferably, the ratio of the mass of the activated carbon in the activated carbon dispersion to the volume of the dispersing agent is 1 g: (100-200) mL.

Preferably, the impregnation is carried out under stirring conditions;

the dipping time is 1-2 h; the dipping times are 5-6 times.

Preferably, the material of the foam layer is expanded polystyrene, polyurethane or polyethylene;

the thickness of the foam layer is 2-3 cm.

The invention also provides a preparation method of the double-sided solar steam device based on interface photothermal conversion, which comprises the following steps:

perforating the foam layer;

embedding one end of the polyester filament yarn column in the axial direction into the hole, and placing a hydrophilic light absorption layer on the other end;

the holes are communicated holes, and the distance between every two adjacent holes is 1-2 cm.

The invention provides a double-sided solar steam device based on interface photothermal conversion, which comprises a hydrophilic light absorption layer, polyester filament columns and a foam layer, wherein the hydrophilic light absorption layer, the polyester filament columns and the foam layer are sequentially arranged from top to bottom; and two ends of the polyester filament column in the axial direction are respectively connected with the hydrophilic light absorption layer and the foam layer. According to the device, the foam layer is used as a supporting layer and a heat insulating layer of the device, the polyester filament columns are water delivery channels, when sunlight irradiates the hydrophilic light absorption layer, due to the high heat conductivity of the hydrophilic light absorption layer in the vertical direction, heat generated by sunlight is absorbed and quickly transferred to the lower surface, simultaneous evaporation of the upper surface and the lower surface of the light absorption layer is realized, namely double-sided evaporation of the hydrophilic light absorption layer is realized, and the utilization rate of the device on solar energy and the steam generation rate are improved; simultaneously, the dacron post is as water delivery passageway, can in time give required evaporation moisture of hydrophilicity light-absorbing layer supply, realizes long-time stable light and heat evaporation, just dacron filament has fabulous chemical stability, makes the device can be used for extreme environment (e.g., the processing of sewage such as strong acid or alkali). According to the description of the embodiment, the evaporation rate of the device of the invention can reach 1.95 kg.m at most^-2·h^-1。

Drawings

FIG. 1 is a schematic structural diagram of the double-sided solar steam device based on interface photothermal conversion;

FIG. 2 is a schematic representation of the interfacial photothermal conversion based bifacial solar steam device prepared in example 1;

FIG. 3 is an SEM photograph of polyester filament columns used in examples 1-2 and comparative example 1;

FIG. 4 is a schematic diagram showing the capillary effect of the polyester filament columns used in examples 1-2 and comparative example 1;

FIG. 5 is a 1s infrared thermal imaging chart before and after heating of the activated carbon-cotton fabric used in examples 1-2 and comparative example 1;

FIG. 6 is a temperature change curve of the activated carbon-cotton fabric used in examples 1-2 and comparative example 1 before and after simulation of solar illumination;

FIG. 7 is a schematic view of the evaporation rate of the interface photothermal conversion-based double-sided solar steam device prepared in examples 1-2 and comparative example 1 under the irradiation of simulated sunlight.

Detailed Description

The invention provides a double-sided solar steam device based on interface photothermal conversion, which comprises a hydrophilic light absorption layer, polyester filament columns and a foam layer, wherein the hydrophilic light absorption layer, the polyester filament columns and the foam layer are sequentially arranged from top to bottom;

two ends of the polyester filament column in the axial direction are respectively connected with the hydrophilic light absorption layer and the foam layer (as shown in figure 1).

In the present invention, all the raw material components are commercially available products well known to those skilled in the art unless otherwise specified.

In the invention, the interface photothermal conversion based double-sided solar steam device comprises a hydrophilic light absorption layer; the thickness of the hydrophilic light absorption layer is preferably 0.2-1 mm, more preferably 0.4-0.8 mm, and most preferably 0.5-0.6 mm; the hydrophilic light absorption layer is preferably activated carbon-cotton fabric; the mass ratio of the activated carbon to the cotton fabric in the activated carbon-cotton fabric is preferably 1: (20-30), more preferably 1: 25.

In the present invention, the preparation method of the activated carbon-cotton fabric preferably comprises the following steps:

and mixing the cotton fabric with the active carbon dispersion liquid, and impregnating to obtain the active carbon-cotton fabric.

The invention has no special influence on the type of the cotton fabric, and the cotton fabric which is well known to the technical personnel in the field can be adopted. In the present invention, the ratio of the mass of the activated carbon in the activated carbon dispersion liquid to the volume of the dispersant is preferably 1 g: (100-200) mL, more preferably 1 g: (120-180) mL, most preferably 1 g: (140-160) mL; the dispersing agent in the active carbon dispersing liquid is preferably acetic acid aqueous solution; the volume ratio of acetic acid to water in the acetic acid aqueous solution is preferably (1-2): 50, more preferably (1.2 to 1.8): 50, most preferably (1.4-1.6): 50.

in the present invention, the method for preparing the activated carbon dispersion is preferably: mixing activated carbon and a dispersing agent, stirring and then performing ultrasonic treatment to obtain an activated carbon dispersion liquid; the stirring is not limited in any way, and the stirring can be carried out by adopting a process well known to a person skilled in the art; in the present invention, the time of the ultrasonic treatment is preferably 0.5 to 1.5 hours, more preferably 0.8 to 1.2 hours, and most preferably 1.0 hour, and the frequency of the ultrasonic treatment is not limited in any way, and may be any frequency known to those skilled in the art.

In the present invention, the mixing temperature of the cotton fabric and the activated carbon dispersion is preferably room temperature; in the present invention, the impregnation is preferably carried out under stirring conditions, and the stirring rate is not particularly limited in the present invention, and may be carried out at a rate well known to those skilled in the art; the soaking time is preferably 1-2 h; after the impregnation is finished, preferably drying the impregnated product at the temperature of 80-90 ℃; the dipping times are preferably 5-6 times; the dipping times are the repeated times of dipping and drying.

In the invention, the double-sided solar steam device based on interface photothermal conversion also comprises a polyester filament column; the polyester filament column is made of polyester filaments; the diameter of the polyester filament column is preferably 5-6 mm, and more preferably 5.2-5.4 mm; the diameter of the polyester filament yarn is preferably 15-25 μm, and more preferably 18-22 μm.

In the invention, the double-sided solar steam device based on interface photothermal conversion further comprises a foam layer, wherein the thickness of the foam layer is preferably 2-3 cm; the material of the foam layer is preferably expanded polystyrene, polyurethane or polyethylene.

In the invention, one end of the polyester filament column in the axial direction is preferably vertically embedded into the foam layer and is consistent with the horizontal height of the bottom of the foam layer; the vertical distance between the other end of the polyester filament column in the axial direction and the top of the foam layer is preferably 1-3 cm, and more preferably 2 cm.

The invention also provides a preparation method of the double-sided solar steam device based on interface photothermal conversion, which comprises the following steps:

perforating the foam layer;

embedding one end of the polyester filament yarn column in the axial direction into the hole, and placing a hydrophilic light absorption layer on the other end;

the holes are communicated holes, and the distance between every two adjacent holes is 1-2 cm.

In the present invention, the pore diameter of the pores is preferably the same as or slightly smaller than the diameter of the polyester filament columns (the "slightly" can be understood as being smaller than the diameter of the polyester filament columns and can ensure that the polyester filament columns are inserted into the pores so as to ensure that the connection between the polyester filament columns and the foams is firmer); the holes are preferably uniformly arranged, and the distance between every two adjacent holes is 1-2 cm, preferably 1.2-1.8 cm, and more preferably 1.4-1.6 cm; the hydrophilic light absorption layer is preferably placed in such a way that the other end of the polyester filament column is in contact with the hydrophilic light absorption layer; the present invention is not limited to any particular contact means.

The double-sided solar steam device based on interfacial photothermal conversion and the method for manufacturing the same according to the present invention will be described in detail with reference to the following examples, which should not be construed as limiting the scope of the present invention.