CN114455655A - Handle zero liquid discharge's of high salt mixed brine solar energy crystallizer - Google Patents

Handle zero liquid discharge's of high salt mixed brine solar energy crystallizer Download PDF

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Publication number
CN114455655A
CN114455655A CN202210157115.6A CN202210157115A CN114455655A CN 114455655 A CN114455655 A CN 114455655A CN 202210157115 A CN202210157115 A CN 202210157115A CN 114455655 A CN114455655 A CN 114455655A
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solar
crystallizer
absorber
liquid discharge
salt mixed
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楚家玉
于桢
冯乐军
宋金刚
黄锦沛
周嘉敏
何世杰
匡永欣
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Dongguan University of Technology
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Dongguan University of Technology
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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
    • C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/04—Chlorides
    • C01D3/06—Preparation by working up brines; seawater or spent lyes
    • 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
    • C02F1/043—Details
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
    • D06M15/256—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing fluorine
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F2001/5218—Crystallization
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/40—Fibres of carbon
    • 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

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

Abstract

The invention discloses a solar crystallizer for treating high-salt mixed brine with zero liquid discharge, relates to the field of photo-thermal conversion, and particularly relates to a solar crystallizer. The invention aims to solve the technical problems of poor stability and low photo-thermal conversion efficiency of the existing solar evaporator in high-salt mixed brine. The solar crystallizer comprises an absorber, a heat insulation layer and a plurality of channels, wherein the channels penetrate through the heat insulation layer and are fixed with the absorber, and the channels are uniformly distributed. The solar salt crystallizer based on the solar interface evaporation technology can stably operate in a high-salt mixed brine solution, and has high photo-thermal conversion efficiency. The solar salt crystallizer is used for treating high-salt mixed brine.

Description

Handle solar energy crystallizer that zero liquid of high salt mixed brine discharged
Technical Field
The invention relates to the field of photo-thermal conversion, in particular to a solar crystallizer.
Background
Zero Liquid Discharge (ZLD) of high brine has attracted increasing attention in recent years. Conventional ZLD systems typically consist of a concentration system and a crystallization system. The concentration system mainly based on reverse osmosis, electrodialysis, membrane distillation and other technologies can concentrate high-salinity brine to be close to saturated brine, and the crystallization system mainly based on a thermal evaporation pool can realize evaporation crystallization of saturated brine. Conventional ZLD systems typically consume large amounts of fossil dye or power resources, wherein the fraction of the crystallization system is enormous. Therefore, the energy consumption of the crystallization system is reduced, and the development of a novel crystallization system is of great significance to the development of the ZLD technology.
Due to low energy consumption and low carbon emission, the solar interface evaporation technology is widely concerned about zero liquid emission of high salinity brine. At present, solar salt crystallizers based on solar interfacial evaporation technology can stably operate in high-salinity sodium chloride solution, but the performance in other high-salinity mixed brine or brine is sharply reduced. Therefore, developing a solar crystallizer that can stably treat high salinity is critical for zero liquid discharge of the high salinity brine.
Disclosure of Invention
The invention provides a solar crystallizer for treating high-salt mixed brine with zero liquid discharge, which aims to solve the technical problems of poor stability and low photo-thermal conversion efficiency of the conventional solar evaporator in the high-salt mixed brine.
A solar crystallizer for treating zero liquid discharge of high-salt mixed brine comprises an absorber, a heat insulation layer and a plurality of channels, wherein the channels penetrate through the heat insulation layer and are fixed with the absorber, and the channels are uniformly distributed;
wherein the absorber is made of HCF material or PVDF-HCF;
the heat insulation layer is made of polystyrene foam;
the material of the channel is HCF material. The HCF material is a carbon fiber felt.
Further, the preparation method of the PVDF-HCF comprises the following steps:
dissolving 5g of polyvinylidene fluoride in 45g N, N-dimethylformamide, and stirring at 80 ℃ for 6h to form a polyvinylidene fluoride solution; uniformly mixing 5g of polyvinylidene fluoride solution, 5g N, N-dimethylformamide and 2g of carbon black to form hydrophobic ink; then 5mL of hydrophobic ink is uniformly coated on the HCF, and the mixture is dried in an oven at 80 ℃ for 4 hours and repeated for 3 times to obtain the PVDF-HCF. Wherein the HCF is a carbon fiber felt.
Further, the distance between the absorber and the heat insulation layer is 0-3 cm.
When the absorber is made of HCF material and the distance between the absorber and the heat insulation layer is 0, namely the absorber is in contact with the heat insulation layer, the solar crystallizer is a two-dimensional solar crystallizer (2 DSC); when the absorber is made of HCF material and the distance between the absorber and the heat insulation layer is more than 0, the solar crystallizer is a three-dimensional solar crystallizer (3 DSC); when the absorber is made of PVDF-HCF and the distance between the absorber and the heat insulation layer is greater than 0, the solar crystallizer is a Janus three-dimensional solar crystallizer (Janus-3 DSC).
The invention has the following beneficial effects:
the solar salt crystallizer based on the solar interface evaporation technology can stably operate in a high-salt mixed brine solution, has high photothermal conversion efficiency, and particularly shows a stable evaporation rate in concentrated simulated seawater by Janus-3 DSC.
Proved by verification, on the premise of intermittent operation, the Janus-3DSC evaporation structure can enable the mixed brine to be stably evaporated under the action of NTA, and the average evaporation rate can reach 2.28 +/-0.04 kg m under 1.5 sun irradiations-2h-1The solar evaporator has good salt rejection performance and can stably evaporate the mixed brine.
The solar salt crystallizer is used for treating high-salt mixed brine.
Drawings
Fig. 1 is a schematic structural diagram of a solar crystallizer according to an embodiment;
FIG. 2 is a schematic structural diagram of a solar crystallizer according to a second embodiment;
FIG. 3 is a schematic structural diagram of a solar crystallizer according to a third embodiment;
FIG. 4 is a SEM picture of the HCF material of the first embodiment;
FIG. 5 is a test chart of water contact angle of HCF material according to the first embodiment;
FIG. 6 is an SEM picture of PVDF-HCF described in example III;
FIG. 7 is a water contact angle test chart of PVDF-HCF described in example III;
FIG. 8 is a photograph of salt crystals formed on the surface of the solar crystallizer (Janus-3DSC) in 20.0 wt% NaCl solution under 1.5 sun irradiation in the third example;
FIG. 9 is a photograph showing the formation of salt crystals on the surface of the solar crystallizer (3DSC) in 20.0 wt% NaCl solution under 1.5 sun irradiation in the second example;
FIG. 10 is a photograph showing the formation of salt crystals on the surface of the solar crystallizer (2DSC) in 20.0 wt% NaCl solution under 1.5 sun irradiation in the first example;
FIG. 11 is a graph of the evaporation rate of a solar crystallizer (Janus-3DSC) described in example three under 1.5 sun exposures in a 20.0 wt% NaCl solution;
FIG. 12 is a graph showing the evaporation rate of the solar crystallizer (3DSC) of example two under 1.5 sun exposures in a 20.0 wt% NaCl solution;
FIG. 13 is a graph of the evaporation rate of a solar crystallizer (2DSC) in 20.0 wt% NaCl solution under 1.5 sun exposures in accordance with example one;
FIG. 14 is a graph of the evaporation rate of a solar crystallizer (Janus-3DSC) described in example three under 1.5 sun exposure in 20.0 wt% concentrated simulated seawater; wherein "●" represents the addition of scale inhibitor (NTA) and ". major" represents the absence of scale inhibitor (NTA).
Detailed Description
The technical solution of the present invention is not limited to the following specific embodiments, but includes any combination of the specific embodiments.
The first embodiment is as follows: the solar crystallizer for treating zero liquid discharge of high-salt mixed brine comprises an absorber 1, a heat insulation layer 2 and a plurality of channels 3, wherein the channels 3 penetrate through the heat insulation layer 2 and are fixed with the absorber 1, and the channels 3 are uniformly distributed;
wherein the material of the absorber 1 is HCF material or PVDF-HCF;
the heat insulation layer 2 is made of polystyrene foam;
the material of the channel 3 is HCF material.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: the HCF material is a carbon fiber felt. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: the preparation method of the PVDF-HCF comprises the following steps:
dissolving 5g of polyvinylidene fluoride in 45g N, N-dimethylformamide, and stirring at 80 ℃ for 6h to form a polyvinylidene fluoride solution; uniformly mixing 5g of polyvinylidene fluoride solution, 5g N, N-dimethylformamide and 2g of carbon black to form hydrophobic ink; then 5mL of hydrophobic ink is uniformly coated on the HCF, and the mixture is dried in an oven at 80 ℃ for 4 hours and repeated for 3 times to obtain the PVDF-HCF. The rest is the same as the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: the number of the channels 3 is 1-10. The others are the same as in one of the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: the distance between the absorber 1 and the heat insulation layer 2 is 0-3 cm. The other is the same as one of the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is: the cross section of the channel 3 is rectangular. The other is the same as one of the first to fifth embodiments.
The seventh concrete implementation mode: the difference between this embodiment and one of the first to sixth embodiments is: the length of the channel 3 is 5-8 cm, and the cross section size is (0.1-1.0) cm x (0.1-1.0) cm. The other is the same as one of the first to sixth embodiments.
The specific implementation mode is eight: the present embodiment differs from one of the first to seventh embodiments in that: the length of the channel 3 is 6cm, and the cross-sectional dimension is 0.5cm x 0.5 cm. The other is the same as one of the first to seventh embodiments.
The specific implementation method nine: the present embodiment differs from the first to eighth embodiments in that: the heat insulation layer 2 is a cylinder, the thickness of the heat insulation layer 2 is 0.95-1.05 cm, and the radius of the bottom surface is 2-3 cm. The rest is the same as the first to eighth embodiments.
The detailed implementation mode is ten: the present embodiment differs from one of the first to ninth embodiments in that: the thickness of the absorber 1 is 0.29-0.31 cm, and the radius of the bottom surface of the absorber 1 is the same as that of the heat insulation layer 2. The other is the same as one of the first to ninth embodiments.
The following experiments are adopted to verify the effect of the invention:
the first embodiment is as follows:
a solar crystallizer for treating zero liquid discharge of high-salt mixed brine comprises an absorber 1, a heat insulation layer 2 and a plurality of channels 3, wherein the channels 3 penetrate through the heat insulation layer 2 and are fixed with the absorber 1, and the channels 3 are uniformly distributed;
wherein the material of the absorber 1 is HCF hydrophilic carbon fiber felt;
the heat insulation layer 2 is made of polystyrene foam;
the material of the channel 3 is HCF hydrophilic carbon fiber felt.
7 channels are provided in the channel 3.
The length of the channel 3 is 6cm, and the cross-sectional dimension is 0.5cm x 0.5 cm.
The thickness of the heat insulation layer 2 is 1.0cm, and the radius of the bottom surface is 2.6 cm.
The thickness of the absorber 1 is 0.3cm, and the radius of the bottom surface of the absorber 1 is the same as that of the heat-insulating layer 2.
Before the hydrophilic carbon fiber felt is used, concentrated nitric acid treatment is carried out for 6 hours under the condition that the water bath temperature is 80 ℃.
The absorber of this example is in contact with a thermal insulation layer, and the solar crystallizer is a two-dimensional solar crystallizer (2 DSC).
The structural schematic diagram of the solar crystallizer of the embodiment is shown in fig. 1.
Example two:
a solar crystallizer for treating zero liquid discharge of high-salt mixed brine comprises an absorber 1, a heat insulation layer 2 and a plurality of channels 3, wherein the channels 3 penetrate through the heat insulation layer 2 and are fixed with the absorber 1, and the channels 3 are uniformly distributed;
wherein the material of the absorber 1 is HCF hydrophilic carbon fiber felt;
the heat insulation layer 2 is made of polystyrene foam;
the material of the channel 3 is HCF hydrophilic carbon fiber felt.
7 channels are provided in the channel 3.
The length of the channel 3 is 6cm, and the cross-sectional dimension is 0.5cm x 0.5 cm.
The thickness of the heat insulation layer 2 is 1.0cm, and the radius of the bottom surface is 2.6 cm.
The thickness of the absorber 1 is 0.3cm, and the radius of the bottom surface of the absorber 1 is the same as that of the heat-insulating layer 2.
Before the hydrophilic carbon fiber felt is used, concentrated nitric acid treatment is carried out for 6 hours under the condition that the water bath temperature is 80 ℃.
The distance between the absorber and the heat insulation layer is 2cm, and the solar crystallizer is a three-dimensional solar crystallizer (3 DSC).
The structural schematic diagram of the solar crystallizer of the embodiment is shown in fig. 2.
Example three:
a solar crystallizer for treating high-salt mixed brine with zero liquid discharge comprises an absorber 1, a heat insulation layer 2 and a plurality of channels 3, wherein the channels 3 penetrate through the heat insulation layer 2 and are fixed with the absorber 1, and the channels 3 are uniformly distributed;
wherein the material of the absorber 1 is PVDF-HCF;
the preparation method of the PVDF-HCF comprises the following steps:
dissolving 5g of polyvinylidene fluoride in 45g N, N-dimethylformamide, and stirring at 80 ℃ for 6h to form a polyvinylidene fluoride solution; uniformly mixing 5g of polyvinylidene fluoride solution, 5g N, N-dimethylformamide and 2g of carbon black to form hydrophobic ink; and then uniformly coating 5mL of hydrophobic ink on the hydrophilic carbon fiber felt, drying for 4 hours in an oven at 80 ℃, and repeating for 3 times to obtain the PVDF-HCF.
The heat insulation layer 2 is made of polystyrene foam;
the material of the channel 3 is HCF hydrophilic carbon fiber felt.
7 channels are provided in the channel 3.
The length of the channel 3 is 6cm, and the cross-sectional dimension is 0.5cm x 0.5 cm.
The thickness of the heat insulation layer 2 is 1.0cm, and the radius of the bottom surface is 2.6 cm.
The thickness of the absorber 1 is 0.3cm, and the radius of the bottom surface of the absorber 1 is the same as that of the heat-insulating layer 2.
Before the hydrophilic carbon fiber felt is used, concentrated nitric acid treatment is carried out for 6 hours under the condition that the water bath temperature is 80 ℃.
The distance between the absorber and the heat insulation layer is 2cm, and the solar crystallizer is a Janus three-dimensional solar crystallizer (Janus-3 DSC).
The structural schematic diagram of the solar crystallizer of the embodiment is shown in fig. 3.
The detection is carried out on the first embodiment, the second embodiment and the third embodiment.
Fig. 4 is an SEM picture of the HCF material of example one, and it can be seen that there are a large number of pores between the carbon fibers, which are channels for water flow and salt migration during solar evaporation.
FIG. 5 is a water contact angle test chart of the HCF material of the first embodiment, and the contact angle of water and HCF is 0 degree, which shows that the sample has super-hydrophilicity.
FIG. 6 is an SEM picture of PVDF-HCF described in example III, and it can be seen that many nanoparticles appear on the surface of the sample after the HCF is coated with PVDF, so that the hydrophobicity of the sample is changed.
FIG. 7 is a water contact angle test chart of PVDF-HCF described in example III, and it can be seen that the contact angle of water and PVDF-HCF is 124 degrees, and the PVDF-HCF becomes hydrophobic material.
FIG. 8 is a photograph of salt crystals formed on the surface of the solar crystallizer (Janus-3DSC) in 20.0 wt% NaCl solution under 1.5 sun irradiation in the third example;
FIG. 9 is a photograph showing the formation of salt crystals on the surface of the solar crystallizer (3DSC) in 20.0 wt% NaCl solution under 1.5 sun irradiation in the second example;
FIG. 10 is a photograph showing the formation of salt crystals on the surface of the solar crystallizer (2DSC) in 20.0 wt% NaCl solution under 1.5 sun irradiation in the first example;
FIG. 11 is a graph of the evaporation rate of the solar crystallizer (Janus-3DSC) described in example three under 1.5 sun exposures in a 20.0 wt% NaCl solution;
FIG. 12 is a graph showing the evaporation rate of the solar crystallizer (3DSC) of example two under 1.5 sun exposures in a 20.0 wt% NaCl solution;
FIG. 13 is a graph of the evaporation rate of the solar crystallizer (2DSC) in 20.0 wt% NaCl solution under 1.5 sun exposures in accordance with one example;
FIG. 14 is a graph of the evaporation rate of a solar crystallizer (Janus-3DSC) described in example three under 1.5 sun exposure in 20.0 wt% concentrated simulated seawater; wherein "●" represents adding antisludging agent (NTA) and "major" represents adding no antisludging agent (NTA).
Comparing 2DSC and 3DSC, the crystallization performance of Janus-3DSC was measured in 20.0 wt% NaCl solution under 1.5 sun irradiation for 8h continuously. For Janus-3DSC, no salt crystals appear at the top of the absorber, but at the bottom of the absorber and channel. In both 3DSC and 2DSC, salt crystals gradually appeared on the top of the absorber. At the same time, the evaporation rate of Janus-3DSC is from 2.43kg m-2h-1Increased to 2.73kg m-2h-1(FIGS. 8 and 11), whereas the evaporation rate of 3DSC was from 2.53kg m-2h-1Reduced to 1.70kg m-2h-1(FIGS. 9 and 12), the evaporation rate of 2DSC was from 1.70kg m-2h-1Reduced to 0.57kg m-2h-1(FIGS. 10 and 13). This result indicates that Janus-3DSC salt rejection is good.
The crystallization performance of the Janus-3DSC was measured in 20.0 wt% concentrated simulated seawater under 1.5 sun exposures (FIG. 14). The evaporation rate of the Janus-3DSC was decreasing in 3 consecutive days. Evaporation rate of Janus-3DSC in concentrated simulated seawater from 2.56kg m on day 1-2h-1Down to 1.18kg m-2h-1. On day 2, the evaporation rate of the Janus-3DSC was restored to 1.56kg m at hour 1-2h-1And decreased from 1.17 to 0.70kg m at the 2 nd hour-2h-1. On day 3, the evaporation rate of Janus-3DSC was restored to 1.01kg m at 1 hour-2h-1From 0.66kg m at hour 2-2h-1Down to 0.39kg m-2h-1. Illustrating that the Janus evaporation structure would fail in high salinity mixed brines under batch operation.
Thus scale inhibitors (NTA) were added to 20.0 wt% concentrated simulated seawater. Under the action of NTA, Janus-3DSC showed a stable evaporation rate in concentrated simulated seawater. The evaporation rate of Janus-3DSC was from 2.51kg m on day 1-2h-1Down to 2.08kg m-2h-1Beginning on day 2 and returning to 2.55kg m-2h-1. The evaporation rate on day 2 was 2.55kg m-2h-1Down to 2.10kg m-2h-1The trend on day 3 was similar to that on the first 2 days. The results show that under the action of NTA, the Janus evaporation structure can stably evaporate the mixed brine under the action of NTA on the premise of batch operation.

Claims (10)

1. A solar crystallizer for treating zero liquid discharge of high-salt mixed brine is characterized by comprising an absorber (1), a heat insulation layer (2) and a plurality of channels (3), wherein the channels (3) penetrate through the heat insulation layer (2) and are fixed with the absorber (1), and the channels (3) are uniformly distributed;
wherein the material of the absorber (1) is HCF material or PVDF-HCF;
the heat insulation layer (2) is made of polystyrene foam;
the material of the channel (3) is HCF material.
2. The solar crystallizer for treating zero liquid discharge of high-salt mixed brine according to claim 1, wherein the HCF material is carbon fiber felt.
3. The solar crystallizer for treating zero liquid discharge of high-salt mixed brine according to claim 1, wherein the preparation method of PVDF-HCF comprises the following steps:
dissolving 5g of polyvinylidene fluoride in 45g N, N-dimethylformamide, and stirring at 80 ℃ for 6h to form a polyvinylidene fluoride solution; uniformly mixing 5g of polyvinylidene fluoride solution, 5g N, N-dimethylformamide and 2g of carbon black to form hydrophobic ink; then 5mL of hydrophobic ink is uniformly coated on the HCF, and the mixture is dried in an oven at 80 ℃ for 4 hours and repeated for 3 times to obtain the PVDF-HCF.
4. The solar crystallizer for treating zero liquid discharge of high-salt mixed brine according to claim 1, wherein 1-10 channels (3) are arranged.
5. The solar crystallizer for treating zero liquid discharge of high-salt mixed brine according to claim 1, wherein the distance between the absorber (1) and the heat insulation layer (2) is 0-3 cm.
6. The solar crystallizer for treating zero liquid discharge of high-salt mixed brine according to claim 1, wherein the cross section of the channel (3) is rectangular.
7. The solar crystallizer for treating zero liquid discharge of high-salt mixed brine according to claim 6, wherein the length of the channel (3) is 5-8 cm, and the cross-sectional dimension is (0.1-1.0) cm x (0.1-1.0) cm.
8. The solar crystallizer for treating zero liquid discharge of high-salt mixed brine according to claim 6, wherein the length of the channel (3) is 6cm and the cross-sectional dimension is 0.5cm x 0.5 cm.
9. The solar crystallizer for treating zero liquid discharge of high-salt mixed brine according to claim 1, wherein the heat insulation layer (2) is a cylinder, the thickness of the heat insulation layer (2) is 0.95-1.05 cm, and the radius of the bottom surface is 2-3 cm.
10. The solar crystallizer for treating zero liquid discharge of high-salt mixed brine according to claim 1, wherein the thickness of the absorber (1) is 0.29-0.31 cm, and the radius of the bottom surface of the absorber (1) is the same as that of the heat insulation layer (2).
CN202210157115.6A 2022-02-21 2022-02-21 Handle zero liquid discharge's of high salt mixed brine solar energy crystallizer Pending CN114455655A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564367A (en) * 1984-06-20 1986-01-14 Diamond Crystal Salt Company Solar salt crystallizer and process for producing salt
CN1583583A (en) * 2004-05-25 2005-02-23 周梦然 Landing solar energy capillary evaporating seawater desalting apparatus
CN202849080U (en) * 2012-07-05 2013-04-03 郭树林 Multi-effect spray salt preparation device with circuitous sun bag
CN110579028A (en) * 2019-08-19 2019-12-17 浙江大学 Photo-thermal conversion device based on hydrophilic carbon felt and application thereof
CN113184940A (en) * 2021-04-22 2021-07-30 江南大学 Photo-thermal conversion material and application thereof in seawater desalination and salt recovery
CN113307321A (en) * 2021-05-11 2021-08-27 苏州大学张家港工业技术研究院 Solar interface evaporator and application thereof
CN113582273A (en) * 2020-04-30 2021-11-02 中国科学院化学研究所 Evaporator for seawater desalination and sewage purification, water purification method and solar evaporation water purification device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564367A (en) * 1984-06-20 1986-01-14 Diamond Crystal Salt Company Solar salt crystallizer and process for producing salt
CN1583583A (en) * 2004-05-25 2005-02-23 周梦然 Landing solar energy capillary evaporating seawater desalting apparatus
CN202849080U (en) * 2012-07-05 2013-04-03 郭树林 Multi-effect spray salt preparation device with circuitous sun bag
CN110579028A (en) * 2019-08-19 2019-12-17 浙江大学 Photo-thermal conversion device based on hydrophilic carbon felt and application thereof
CN113582273A (en) * 2020-04-30 2021-11-02 中国科学院化学研究所 Evaporator for seawater desalination and sewage purification, water purification method and solar evaporation water purification device
CN113184940A (en) * 2021-04-22 2021-07-30 江南大学 Photo-thermal conversion material and application thereof in seawater desalination and salt recovery
CN113307321A (en) * 2021-05-11 2021-08-27 苏州大学张家港工业技术研究院 Solar interface evaporator and application thereof

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