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WO2018196351A1 - Nouveau dispositif d'évaporation photothermique de l'eau de mer par l'énergie solaire - Google Patents

Nouveau dispositif d'évaporation photothermique de l'eau de mer par l'énergie solaire Download PDF

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Publication number
WO2018196351A1
WO2018196351A1 PCT/CN2017/111850 CN2017111850W WO2018196351A1 WO 2018196351 A1 WO2018196351 A1 WO 2018196351A1 CN 2017111850 W CN2017111850 W CN 2017111850W WO 2018196351 A1 WO2018196351 A1 WO 2018196351A1
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WIPO (PCT)
Prior art keywords
photothermal conversion
fabric
hydrophilic
sides
fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/111850
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English (en)
Chinese (zh)
Inventor
陈志钢
刘子潇
张丽莎
朱美芳
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Donghua University
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Donghua University
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Publication date
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Publication of WO2018196351A1 publication Critical patent/WO2018196351A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/08—Thin film evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment
    • Y02A20/208—Off-grid powered water treatment
    • Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation

Definitions

  • the utility model belongs to the technical field of seawater evaporation, in particular to a novel solar thermal seawater evaporation device.
  • Seawater accounts for more than 70% of the Earth's surface and is one of the most abundant resources on Earth. However, compared with abundant sea water resources, fresh water on the earth only accounts for 2.8% of all water resources, and 68.69% of fresh water is stored in permanent glaciers in the earth's poles, plateaus and snow-capped mountains. Freshwater shortage is recognized in the world. One of the most serious challenges. The most ideal way to overcome this problem is to use desalination of seawater to produce fresh water. To achieve this goal, various seawater desalination technologies have been developed, including seawater distillation, electrodialysis, and reverse osmosis filtration technologies. Most of these methods require direct or indirect consumption of large amounts of fossil energy, which increases costs and creates an environmental burden. The use of solar energy for seawater distillation can get rid of the consumption of fossil energy in the desalination process, attracting great attention.
  • the heat-generating layer of this method has a large area of contact with the surface of the seawater, and the generated heat is inevitably lost to the seawater, thereby reducing the utilization of solar energy; in addition, this method causes the salt in the seawater to be
  • the surface of the heat generating layer is deposited to cover the light receiving surface and block the void, thereby causing the photothermal conversion layer to fail.
  • the technical problem to be solved by the utility model is to provide a novel solar thermal seawater evaporation device, which utilizes solar energy resources to realize high-efficiency evaporation of seawater, reduce cost, improve seawater evaporation efficiency, and avoid salt conversion in seawater to reduce solar energy conversion efficiency.
  • the technical solution adopted by the utility model to solve the technical problem thereof is to provide a novel solar photothermal seawater evaporation device, which comprises a water tank on both sides, a hydrophilic photothermal conversion fabric and a concentrate collection box, and the hydrophilic photothermal conversion Fabric sides They are respectively laid on the water tanks on both sides, and the two ends of the hydrophilic photothermal conversion fabric are respectively placed in the water tanks on both sides and immersed below the sea surface, and the hydrophilic light-heat conversion fabric between the water tanks on both sides is under a concave arc shape, wherein the middle portion of the hydrophilic photothermal conversion fabric is a photothermal conversion region containing a photothermal conversion material, and the concentrate collection box is disposed below the lowest point of the central arc of the hydrophilic photothermal conversion fabric.
  • the height difference h 1 between the high point of the two ends of the hydrophilic photothermal conversion fabric and the intermediate low point is 0 ⁇ h 1 ⁇ 10 m.
  • the height difference of the sea surface in the water tanks on both sides is greater than or equal to 0 and less than or equal to 10 m.
  • the height difference h 2 between the sea surface and the high point of the hydrophilic photothermal conversion fabric is 0 ⁇ h 2 ⁇ 10 m.
  • the hydrophilic photothermal conversion fabric is composed of a hydrophilic fabric substrate and a photothermal conversion material.
  • the hydrophilic fabric substrate is a knitted fabric, a woven fabric or a non-woven fabric made of one or more of natural fibers, regenerated cellulose fibers, and chemical fibers.
  • the natural fiber is cotton, hemp, silk, wool or pulp
  • the regenerated cellulose fiber is Lyocell fiber, Modal fiber, bamboo fiber, chitin fiber or copper ammonia fiber
  • the chemical fiber is polyester, spandex, acrylic fiber, Nylon, vinylon or polypropylene.
  • the non-woven fabric is a nonwoven fabric.
  • the photothermal conversion material includes one or more of metal nanoparticles, carbon nano materials, organic photothermal materials, and semiconductor photothermal nano materials.
  • the metal nanoparticles are gold nanoparticles, palladium nanoparticles, platinum nanoparticles or aluminum nanoparticles
  • the carbon nano materials are carbon black, carbon powder, porous carbon, carbon nanotubes, graphene or fullerenes.
  • the organic photothermal material is polypyrrole, polythiophene, polyaniline, polydopamine, phthalocyanine green or Prussian blue
  • the semiconductor photothermal nano material is copper sulfide, copper selenide, barium sulfide, barium selenide, tungsten sulfide, Tungsten oxide, titanium dioxide, titanium trioxide, iron sulfide or molybdenum sulfide.
  • Water vapor can be generated from the upper and lower surfaces of the photothermal conversion fabric, increasing the area generated by the steam and improving the steam generation efficiency;
  • the present invention can The heat produced by Yangneng concentrates on heating the seawater on the surface of the fabric, avoiding the longitudinal loss of heat to the interior of the seawater, and greatly improving the evaporation efficiency of seawater;
  • the utility model relates to a continuous solar water evaporation-concentration synergistic generating device, which can remove residual salt on the surface of the fabric while evaporating seawater, so that the surface of the photothermal conversion fabric does not precipitate a salt cover layer and affects the solar energy.
  • the utilization efficiency reduces the evaporation performance.
  • FIG. 1 is a schematic structural view of a conventional solar thermal seawater evaporation device.
  • Figure 2 is a schematic view of the structure of the present invention.
  • FIG 3 is a comparison diagram of accumulated steam generation amount of the utility model and the conventional solar thermal seawater evaporation device in the first embodiment.
  • Figure 4 is a graph showing the evaporation rate of seawater at different times in the present embodiment in Example 2.
  • Fig. 5 is a graph showing the cumulative steam generation amount of the present invention in the second embodiment.
  • a novel solar thermal seawater evaporation device as shown in FIG. 2 includes a water tank on both sides, a hydrophilic photothermal conversion fabric 2, and a concentrate collection tank 3.
  • the two sides of the hydrophilic photothermal conversion fabric 2 are respectively laid on the water tanks 1 on both sides, and the two ends of the hydrophilic photothermal conversion fabric 2 are respectively placed in the water tanks 1 on both sides and submerged below the sea surface, and the water tanks on both sides 1
  • the height difference between the sea surface and the height of both ends of the hydrophilic photothermal conversion fabric 2 is 0 ⁇ h 2 ⁇ 10 m.
  • the hydrophilic photothermal conversion fabric 2 between the water tanks 1 on both sides has a concave arc shape, and the height difference h 1 between the high point and the middle low point of the hydrophilic photothermal conversion fabric 2 is 0 ⁇ h 1 ⁇ 10m.
  • the hydrophilic photothermal conversion fabric 2 is composed of a hydrophilic fabric substrate and a photothermal conversion material.
  • the hydrophilic fabric substrate is a knitted fabric, a woven fabric or a non-woven fabric (such as a non-woven fabric) made of one or more of natural fibers, regenerated cellulose fibers and chemical fibers, and the natural fibers are cotton, hemp and silk. , hair or pulp, etc., regenerated cellulose fiber is Lyocell fiber, Modal fiber, bamboo fiber, chitin fiber or copper ammonia fiber, chemical fiber is polyester, spandex, acrylic, nylon, vinylon or polypropylene.
  • Photothermal conversion materials include metal nanoparticles, carbon nanomaterials, organic photothermal materials, and semiconductor light One or more of the thermal nanomaterials.
  • the metal nanoparticles are gold nanoparticles, palladium nanoparticles, platinum nanoparticles or aluminum nanoparticles
  • carbon nano materials are carbon black, carbon powder, porous carbon, carbon nanotubes, graphene or fullerenes
  • organic photothermal materials are poly Pyrrole, polythiophene, polyaniline, polydopamine, phthalocyanine green or Prussian blue
  • semiconductor photothermal nanomaterials are copper sulfide, copper selenide, antimony sulfide, antimony selenide, tungsten sulfide, tungsten oxide, titanium dioxide, trioxide Titanium, iron sulfide or molybdenum sulfide.
  • the middle portion of the hydrophilic photothermal conversion fabric 2 is a photothermal conversion region containing a photothermal conversion material, and the concentrate collection box 3 is disposed below the lowest point of the central arc of the hydrophilic photothermal conversion fabric 2.
  • the obtained photothermal conversion fabric is fixed on the ports of two square polyethylene plastic boxes by clips, and the edge portion of the fabric naturally hangs down and contacts the seawater in the water box, and the height difference between the center of the fabric and the plastic box port is 1 cm, plastic
  • the seawater level in the box is 2mm lower than the plastic box port.
  • An ethanol dispersion of 8 mg/mL of polyaniline was prepared as in Example 1. Take 600mL of dispersion, drop it repeatedly in the middle part of 80 ⁇ 240cm cotton cloth, control the dropping area to the 80 ⁇ 140cm part of the cotton cloth center, and blow it dry with hair dryer, fix the two ends of the cotton cloth with clips.
  • the device is placed under the sunlight to record the change in the quality of the water evaporation.
  • the sunlight intensity and the corresponding water evaporation rate at different times are shown in Figure 4.
  • the device is accumulated in one day.
  • the quality of the generated steam is shown in Figure 5.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un nouveau dispositif d'évaporation photothermique de l'eau de mer par de l'énergie solaire, comprenant des réservoirs d'eau (1) sur deux côtés, un tissu de conversion photothermique hydrophile (2) et un réservoir de collecte de solution concentrée (3). Les deux côtés du tissu de conversion photothermique hydrophile (2) sont respectivement posés sur les réservoirs d'eau (1) sur les deux côtés, et les deux extrémités du tissu de conversion photothermique hydrophile (2) sont respectivement placées dans les réservoirs d'eau (1) sur deux côtés et immergées sous la surface de l'eau de mer. Le tissu de conversion photothermique hydrophile (2) entre les réservoirs d'eau (1) sur deux côtés présente une forme d'arc concave ; la partie centrale du tissu de conversion photothermique hydrophile (2) est une zone de conversion photothermique contenant des matériaux de conversion photothermique ; et le réservoir de collecte de solution concentrée (3) est disposé de ce fait au-dessous du point le plus bas de l'arc au milieu du tissu de conversion photothermique hydrophile (2). La présente invention utilise des ressources d'énergie solaires pour évaporer efficacement l'eau de mer, ce qui réduit les coûts, améliore l'efficacité d'évaporation de l'eau de mer, et évite la précipitation du sel dans l'eau de mer.
PCT/CN2017/111850 2017-04-24 2017-11-20 Nouveau dispositif d'évaporation photothermique de l'eau de mer par l'énergie solaire Ceased WO2018196351A1 (fr)

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Application Number Priority Date Filing Date Title
CN201720433722.5U CN207016517U (zh) 2017-04-24 2017-04-24 一种新型太阳能光热海水蒸发装置
CN201720433722.5 2017-04-24

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WO2018196351A1 true WO2018196351A1 (fr) 2018-11-01

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Cited By (1)

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CN115448403A (zh) * 2022-10-13 2022-12-09 西安交通大学 一种光热/蒸发界面分离的多级太阳能水蒸发收集装置及方法

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CN108679865B (zh) * 2018-03-22 2020-07-10 中国科学技术大学 用于太阳能水蒸气蒸发的二维导电高分子太阳光吸收体的制备方法
CN110746657B (zh) * 2018-07-23 2021-08-03 桂林电子科技大学 一种复合生物质气凝胶光热转换材料的制备方法及其应用
CN109487315B (zh) * 2018-09-21 2021-08-10 上海大学 结合碳黑薄膜的多孔材料、其应用及其制备方法
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CN109607650A (zh) * 2018-12-24 2019-04-12 常熟理工学院 纳米金/石墨烯木质结构光热转换材料的制备方法
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CN111348708B (zh) * 2020-02-10 2021-06-11 东华大学 向光型太阳能光热海水蒸发方法及其装置
CN111924918B (zh) * 2020-06-29 2021-10-26 东华大学 一种双面光热转换材料及由其构筑的太阳能海水蒸发装置
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Publication number Priority date Publication date Assignee Title
CN115448403A (zh) * 2022-10-13 2022-12-09 西安交通大学 一种光热/蒸发界面分离的多级太阳能水蒸发收集装置及方法
CN115448403B (zh) * 2022-10-13 2023-08-15 西安交通大学 一种光热/蒸发界面分离的多级太阳能水蒸发收集装置及方法

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