Columnar evaporator and device integrating seawater purification, sterilization and fixed-point salt crystallization

Abstract

The application discloses a cylindrical evaporator and device integrating seawater purification, sterilization and fixed-point salt deposition, solves the problem of low seawater desalination efficiency caused by limited evaporation area of the evaporator in the prior art, and has the beneficial effects of improving seawater evaporation efficiency and improving the antibacterial ability of the evaporator, and the specific scheme is as follows: the cylindrical evaporator integrating seawater purification, sterilization and fixed-point salt deposition comprises a column body, and the column body is provided with a plurality of convex columns on a certain section or the whole length, that is, the column body is provided with convex portions in the circumferential direction, the number of angles of the plurality of convex columns is greater than or equal to 3, the center lines of the convex portions of the plurality of convex columns are arranged along the radial direction of the plurality of convex columns, or the convex portions of the plurality of convex columns are arranged in the tangential direction of the column body or are arranged obliquely to the side edges of the column body; and the surface of the column body is coated with a photo-thermal material.

Description

Technical Field

[0001] This invention relates to the field of seawater desalination, and in particular to a columnar evaporator and apparatus that integrates seawater purification, sterilization, and fixed-point salt deposition. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Traditional seawater desalination technologies, such as reverse osmosis, are effective in addressing freshwater scarcity to some extent, but they suffer from high energy consumption and maintenance costs. In contrast, solar water purification can reduce the emission of toxic byproducts (brine), making it more environmentally friendly and efficient. However, current solar water purification materials still face some challenges in practical applications. One significant concern is that salt crystallization can cover the material's surface, thus affecting evaporation performance. Therefore, achieving targeted salt formation is crucial. Current methods for targeted salt formation mostly involve controlling the macroscopic shape of the evaporator, including mushroom and cone shapes. While these designs are ingenious, the desalination efficiency remains low due to limitations in evaporation area and water vapor dissipation.

[0004] The inventors also discovered that another problem limiting the practical application of solar desalination is the limited resistance of materials to biofouling. The warm environment formed around the evaporator during the solar desalination process promotes the growth of microorganisms, resulting in microbial aggregation and seriously affecting the service life of the evaporator.

[0005] Currently, the antibacterial properties of graphene are mainly used to prepare photothermal materials for solar-powered seawater desalination that resists biofouling. However, the materials are difficult to manufacture and have high production costs, making them unsuitable for mass production. Summary of the Invention

[0006] In view of the shortcomings of existing technologies, the purpose of this invention is to provide a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt deposition, in order to achieve the goal of efficient solar-powered seawater desalination.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] A columnar evaporator integrating seawater purification, sterilization, and fixed-point salt deposition includes a column body. A section or the entire length of the column body is provided with multiple protrusions. The number of angles of the multi-protruding column body is greater than or equal to 3. The center line of the protrusions of the multi-protruding column body is set along the radial direction of the multi-protruding column body. Alternatively, the protrusions of the multi-protruding column body are located in the tangential direction of the column body or are inclined to the side of the column body.

[0009] The surface of the column is coated with photothermal material.

[0010] As described above, the columnar evaporator has a section or its entire length that is a multi-convex column, meaning that multiple protrusions are formed on the periphery of the column. When the columnar evaporator is working, compared with an evaporator without protrusions, the evaporation area is effectively increased, and the corresponding evaporation flux is gradually increased. The evaporation flux reaches its maximum at the protrusions because the protrusions are more conducive to the diffusion of water vapor, enabling the targeted evaporation of water vapor and the targeted collection of salt. The surface of the column is coated with photothermal material, which helps the evaporator absorb sunlight and accelerates the water evaporation, purification, and sterilization processes.

[0011] As described above, the columnar evaporator integrates seawater purification, sterilization, and fixed-point salt deposition. The column is a multi-convex column, which is an oblique dodecagonal star column. Under the premise that the diameter of the column is the same, the oblique dodecagonal star column has a larger evaporation area than the regular dodecagonal star column, which effectively improves the evaporation flux.

[0012] The multi-convex cylinder includes a circular cylinder with multiple protrusions on its periphery. These protrusions are pointed, which are more conducive to the diffusion of water vapor, the fixed-point evaporation of water vapor, and the fixed-point collection of salt. The protrusions have a set length.

[0013] As described above, in order to ensure the area of ​​fixed-point salt formation, the length of the protrusion in the cylindrical evaporator that integrates seawater purification, sterilization, and fixed-point salt formation is 1 / 5 to 1 / 3 of the diameter of the cylindrical body.

[0014] The width of the side of the protrusion away from the cylindrical body is less than or equal to the width of the side closest to the cylindrical body.

[0015] As described above, in the cylindrical evaporator that integrates seawater purification, sterilization, and fixed-point salt deposition, when the cross-section of the multi-convex column is a regular multi-convex column, the convex section of the multi-convex column is an isosceles triangle to ensure the evaporation area.

[0016] As described above, the columnar evaporator integrates seawater purification, sterilization, and fixed-point salt deposition. The photothermal material is carbon-loaded nitrogen-doped titanium dioxide containing oxygen vacancies. The titanium dioxide material can also act as a photocatalyst, enabling organic matter to be oxidized and decomposed into water and carbon dioxide. The sulfur, phosphorus, and nitrogen atoms initially contained in the organic matter are converted into inorganic salts, thereby reducing or even completely eliminating the original harmfulness. The carbon-loaded nitrogen-doped titanium dioxide containing oxygen vacancies further ensures the evaporator's light absorption and antibacterial performance.

[0017] The columnar evaporator described above, which integrates seawater purification, sterilization, and targeted salt deposition, includes the following steps in the preparation process of the carbon-loaded, nitrogen-doped titanium dioxide material containing oxygen vacancies:

[0018] Phthalic acid, benzoic acid completely dissolved in N,N-dimethylformamide, and anhydrous methanol are mixed, and tetrabutyl titanate is added and stirred for a set time to obtain a mixed solution.

[0019] The mixed solution is poured into a reaction vessel and reacted at a set temperature for a set time to obtain a solid, which is a nitrogen-doped titanium-based metal with defects.

[0020] The solid is cleaned and then calcined in a nitrogen atmosphere to obtain titanium oxide material. This preparation process uses nitrogen-doped titanium-based metal with defects as a precursor. After calcination, nitrogen-doped carbon-supported titanium oxide material is formed. Spraying this material onto the surface of the evaporator can help improve the ability to generate fixed-point salts, improve the efficiency of seawater desalination, and also effectively sterilize and degrade organic matter.

[0021] In addition, the present invention also provides a columnar evaporation device that integrates seawater purification, sterilization and fixed-point salt formation, including a base, at least one of the columnar evaporators that integrate seawater purification, sterilization and fixed-point salt formation is provided in the base, the base is provided with an opening to allow seawater to enter the base, a transparent or semi-transparent top cover is provided on the top of the base, the top cover is detachable from the base, and a water outlet pipe connected to the top of the base is provided on the side of the base.

[0022] As described above, the columnar evaporator integrates seawater purification, sterilization, and fixed-point salt deposition. The top of the base is provided with the opening described above. Seawater enters the base through the opening at the top of the base and is desalinated by the evaporator.

[0023] The base is equipped with a limiting mesh, which has limiting holes that fit the column body to prevent the evaporator from tilting.

[0024] As described above, the columnar evaporation device that integrates seawater purification, sterilization, and fixed-point salt formation has a first recess and a second recess on the top of the base. The first recess is located outside the second recess and is used to cooperate with the top cover. The second recess is connected to the water outlet pipe, and the top cover is inserted into the first recess.

[0025] The top cover is hemispherical in shape, which allows the evaporator to receive sunlight to the maximum extent and also allows the condensed water to flow down in a timely manner.

[0026] In addition, the present invention also provides a method for operating a columnar evaporation device that integrates seawater purification, sterilization, and fixed-point salt deposition, including the following:

[0027] At least one column is set in the base, and the distance between two adjacent columns is set;

[0028] Place the top cover on top of the base;

[0029] Add seawater to the base;

[0030] Seawater evaporates to form water vapor, which condenses upon contact with the top cover. The condensed water then flows under the influence of the top cover and is discharged through the outlet pipe.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1) This invention provides a cylindrical evaporator in which a section or the entire length of the column is a multi-convex column, that is, multiple protrusions are formed on the periphery of the column. When the cylindrical evaporator is working, compared with an evaporator without protrusions, the evaporation area is effectively increased, and the corresponding evaporation flux is gradually increased. The evaporation flux reaches the highest at the protrusion position because the protrusion is more conducive to the diffusion of water vapor, which can realize the targeted evaporation of water vapor and the targeted collection of salt, thereby improving the efficiency of seawater desalination. The surface of the column is coated with photothermal material, which is conducive to the evaporator absorbing sunlight and accelerating the water evaporation, purification and sterilization process.

[0033] 2) In this invention, the multi-convex column is an oblique dodecagonal star column. Compared with the regular dodecagonal star column, the area of ​​the pointed convex part of the oblique dodecagonal star column is larger than that of the pointed convex part of the regular dodecagonal star column, which further increases the evaporation area, effectively improves the evaporation flux, and ensures the water evaporation efficiency. After a period of evaporation, all the salt crystals are concentrated at the pointed convex part of the oblique dodecagonal star column, realizing fixed-point salt crystallization.

[0034] 3) In this invention, the photothermal material is carbon-supported nitrogen-doped titanium dioxide material containing oxygen vacancies. Titanium dioxide material can also act as a photocatalyst, which can oxidize and decompose organic matter into water and carbon dioxide. The sulfur, phosphorus, and nitrogen atoms initially contained in the organic matter are converted into inorganic salts, thereby reducing or even completely eliminating the original hazards. Moreover, titanium dioxide material can generate a large amount of active oxygen substances under light, providing antibacterial ability and effectively reducing the risk of pollution caused by the increase of bacteria in natural water bodies during long-term use of the evaporator.

[0035] 4) In the preparation process of titanium oxide in this invention, a nitrogen-doped titanium-based metal-organic framework (MOF) material with defects is first obtained. Using this MOF material as a precursor, after calcination, a nitrogen-doped carbon-supported titanium oxide material is formed. Spraying this material onto the surface of the evaporator is beneficial to improving the seawater desalination efficiency and can also effectively sterilize and degrade organic matter.

[0036] 5) The evaporation device in this invention has a reasonable structure. The base forms a space to accommodate the evaporator. The base has openings to allow seawater to enter the base. The base supports the top cover. During the evaporation process, the water vapor encounters the top cover and is pre-cooled and condensed. After condensation, it flows downward through the top cover and out through the water outlet pipe, which is conducive to the collection of desalinated water. Attached Figure Description

[0037] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0038] Figure 1 This is a schematic diagram of a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt deposition according to one or more embodiments of the present invention.

[0039] Figure 2 This is a comparative diagram of the photothermal capacity of various types of evaporators using finite element simulation in a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt formation according to one or more embodiments of the present invention.

[0040] Figure 3 This is a comparison chart of the evaporation performance of various types of evaporators using finite element analysis in a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt formation according to one or more embodiments of the present invention.

[0041] Figure 4 This is a schematic diagram of the crystallization process after a set time using a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt formation according to one or more embodiments of the present invention.

[0042] Figure 5 The present invention relates to the content of Ti elements in different valence states of various photothermal materials in a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt formation according to one or more embodiments.

[0043] Figure 6 This is a numerical schematic diagram of the lattice oxygen, chemically adsorbed oxygen, and oxygen vacancies of various photothermal materials in a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt formation according to one or more embodiments of the present invention.

[0044] Figure 7 This is a schematic diagram illustrating the photothermal absorption capacity of various photothermal materials in a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt deposition, according to one or more embodiments of the present invention.

[0045] Figure 8 This is a comparison chart of the seawater evaporation rate of a columnar evaporator coated with various photothermal materials, which integrates seawater purification, sterilization, and fixed-point salt formation according to one or more embodiments of the present invention.

[0046] Figure 9 This is a schematic diagram showing the changes in the number of two bacterial species after a set period of light exposure in a columnar evaporator using a Tv-NC500@F evaporator, which integrates seawater purification, sterilization, and fixed-point salt formation according to one or more embodiments of the present invention.

[0047] Figure 10 This is a schematic diagram showing the changes in the number of two bacterial species after a set period of light exposure in a columnar evaporator using a Tv-NC500@F evaporator, which integrates seawater purification, sterilization, and fixed-point salt formation according to one or more embodiments of the present invention.

[0048] Figure 11 This is a schematic diagram illustrating the change in methylene blue concentration over reaction time in a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt deposition, according to one or more embodiments of the present invention.

[0049] Figure 12 This is a schematic diagram of the base and top cover of a columnar evaporation device that integrates seawater purification, sterilization, and fixed-point salt formation according to one or more embodiments of the present invention.

[0050] Figure 13 This is a schematic diagram of the usage state of a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt deposition according to one or more embodiments of the present invention.

[0051] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0052] Among them: 1. Oblique dodecagonal star column, 1-1. Protrusion, 2. Base, 2-1. First concave part, 2-2. Second concave part, 3. Top cover, 4. Water outlet pipe. Detailed Implementation

[0053] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] As described in the background section, the existing technology suffers from the problem of limited evaporation area and low seawater desalination efficiency. In order to solve the above technical problems, this invention proposes a columnar evaporator that integrates seawater purification, sterilization, and fixed-point salt deposition.

[0056] Example 1

[0057] In a typical embodiment of the present invention, a columnar evaporator integrating seawater purification, sterilization, and fixed-point salt deposition includes a column body. A section or the entire length of the column body is provided with multiple protrusions. The number of angles of the multi-protruding column body is greater than or equal to 3. The center line of the protrusions of the multi-protruding column body is arranged along the radial direction of the multi-protruding column body. Alternatively, the protrusions of the multi-protruding column body are located in the tangential direction of the column body or are inclined to the side of the column body. The surface of the column body is coated with a photothermal material, which can effectively increase the temperature of the column body surface under the action of sunlight.

[0058] In this embodiment, reference Figure 1 As shown, the column is a multi-convex column, and the multi-convex column is an oblique dodecagonal star column 1. Under the premise that the diameter of the column is the same, the oblique dodecagonal star column 1 has a larger evaporation area than the regular dodecagonal star column, which effectively improves the evaporation flux. The column material can be foam material, such as melamine foam material.

[0059] The oblique dodecagonal star cylinder 1 includes a circular cylinder with multiple protrusions 1-1 arranged evenly on its periphery. The diameter of the protrusion's center line (passing through the tip) is greater than 90° with the diameter of the cylinder (the diameter at the intersection of the tip and the cylinder). In this case, the protrusion 1-1 is a pointed protrusion. The width of the pointed protrusion away from the cylinder is less than or equal to the width near the cylinder. The pointed protrusion is a pointed angle. The pointed protrusion is more conducive to the diffusion of water vapor, the fixed-point evaporation of water vapor, and the fixed-point collection of salt. The protrusion has a set length.

[0060] To ensure the area of ​​salt deposition at fixed points, the length of the convex part 1-1 is 1 / 5 to 1 / 3 of the diameter of the circular cylinder.

[0061] In other examples, when the cross-section of the multi-convex prism is a regular multi-convex prism, it can be a regular dodecagonal prism. The convex section of the multi-convex prism is an isosceles triangle to ensure the evaporation area.

[0062] refer to Figure 2 and Figure 3 As shown, finite element analysis was performed on the photothermal and evaporation capacities of dodecagonal prisms, pentagonal prisms, regular dodecagonal prisms, and oblique dodecagonal prisms. The analysis results are shown in [the table below]. Figure 2 and Figure 3 As shown.

[0063] In this embodiment, the photothermal material is carbon-supported nitrogen-doped titanium dioxide containing oxygen vacancies. Titanium dioxide not only serves as a photothermal material but also as a photocatalyst, enabling organic matter to be oxidized and decomposed into water and carbon dioxide. The sulfur, phosphorus, and nitrogen atoms initially contained in the organic matter are converted into inorganic salts, thereby reducing or even completely eliminating the original harmfulness. Due to the nitrogen doping and the generation of oxygen vacancies, the light absorption capacity of the carbon-supported nitrogen-doped titanium dioxide containing oxygen vacancies is significantly improved.

[0064] The preparation process of carbon-supported nitrogen-doped titanium dioxide materials containing oxygen vacancies includes the following:

[0065] 0.027 mol 2-NH2-terephthalic acid + 0.003 mol NH2-benzoic acid were completely dissolved in 125 mL of DMF (N,N-dimethylformamide) and anhydrous methanol (13.5 mL);

[0066] Quickly add 2.6 mL of TBT (tetrabutyl titanate) and stir for 30 minutes;

[0067] The solution was reacted at 150°C for 24 hours in a polytetrafluoroethylene-sealed autoclave.

[0068] After washing three times with anhydrous methanol and drying under vacuum at 80°C, MIL-125 (a titanium-centered MOF material; metal-organic framework (MOF) is a porous material composed of metal ions or metal clusters connected to organic ligands through coordination bonds) was obtained.

[0069] Calcination of MI L-125 at 500°C for 5 hours in a nitrogen atmosphere yielded Tv-NC500.

[0070] In this preparation process, a nitrogen-doped titanium-based metal with defects (the coordination of titanium is not saturated before calcination) is used as a precursor. After calcination, a nitrogen-doped carbon-supported titanium oxide material is formed. Spraying this material onto the surface of the evaporator helps to improve the ability to generate fixed-point salts, improve the efficiency of seawater desalination, and effectively sterilize and degrade organic matter. After calcination, the organic matter in the MOF material pairs to form carbon, and finally carbon-supported nitrogen-doped titanium oxide containing oxygen vacancies is obtained.

[0071] Regarding photothermal materials, this embodiment characterized three different photothermal materials: carbon-supported titanium dioxide (T-C500), carbon-supported nitrogen-doped titanium dioxide (T-NC500), and carbon-supported nitrogen-doped titanium dioxide containing oxygen vacancies (Tv-NC500). (Refer to...) Figure 5 The figure shows the Ti (titanium) content at different valence states, with peak values ​​at 458.5 eV (electron volts, a unit of energy) and 464.3 eV corresponding to Ti.4+ The element, while the peaks located at 457.8–458.0 eV and 463.4–463.6 eV are considered to be Ti. 3+ Characteristic peaks of elements. From Figure 5 As can be seen, Ti is almost invisible in T-C500. 3+ The peak value indicates the absence of oxygen vacancies in the material. A small amount of Ti can be observed in T-NC500. 3+ The peak value indicates that nitrogen doping promotes the formation of a small number of oxygen vacancies. For the TV-NC500 material, Ti 3+ The peak value is relatively high, which is necessary for further determination of Ti. 3 + With Ti 4+ The ratio of the two was calculated by XPS (X-ray photoelectron spectroscopy, where peaks represent the corresponding elements, and higher peaks represent more of the corresponding elements) peak areas.

[0072] Oxygen vacancies refer to the vacancies formed when oxygen atoms in a metal oxide lattice detach and are missing.

[0073] To further confirm the presence of oxygen vacancies, the XPS peaks for oxygen were analyzed, referencing... Figure 6 As shown, the peak values ​​of lattice oxygen (Lo) and chemisorbed oxygen (Co) are located in the ranges of 530.0-530.3 eV and 532.1-532.4 eV, respectively. Oxygen vacancies (Vo) are located at approximately 531.2 eV

[10] . The Lo peak corresponds to O2- atoms in the lattice and Ti2- atoms in the TiO2 lattice. 4 +Complete coordination. Vo arises from oxygen vacancies in the O2- matrix, while Co originates from oxygen or OH groups dissociated from H2O or O2 in the surrounding environment. For example... Figure 6 As shown, compared with the other two materials, Tv-NC500 has the highest Vo content, which is consistent with the XPS results of Ti, both indicating that oxygen vacancies were successfully prepared in Tv-NC500 material.

[0074] To investigate the light absorption capabilities of different photothermal materials, their ultraviolet / visible-infrared absorption spectra were measured. For example... Figure 7 As shown, Tv-NC500 exhibits broad light absorption covering the entire ultraviolet / visible-near-infrared region, with an absorption efficiency of up to 97%. In contrast, the light absorption capabilities of T-C500 and T-NC500 are significantly weaker, especially T-C500, which has very low absorption in the near-infrared region. This result indicates that the light absorption capability of Tv-NC500 is significantly enhanced due to nitrogen doping and the generation of oxygen vacancies.

[0075] Figure 8The evaporation rates of seawater in evaporators prepared using different photothermal materials as the photothermal layer were demonstrated. The evaporator with the Tv-NC500@F (where F represents melamine foam material, representing the evaporator itself) had the highest evaporation rate of 4.57 kg / m³. -2 h -1 The Ti2O3 (titanium oxide)@F evaporator had the lowest evaporation rate at 3.52 kg / m³. -2 h -1 The evaporation rates of T-C500@F and T-NC500@F fall between the two, indicating that the presence of nitrogen doping and oxygen vacancies in the Tv-NC500@F evaporator significantly improves the evaporator's evaporation performance.

[0076] Regarding the antibacterial properties of the selected photothermal material, Staphylococcus aureus and Escherichia coli were used as experimental models to investigate the antibacterial ability of the TV-NC500@F evaporator, with the colony count on the control group agar plates used as a reference. Figure 9 and Figure 10 As shown, the TV-NC500@F evaporator exhibits significant antibacterial effects against both *S. aureus* and *E. coli*. The antibacterial rate gradually increases with increasing light exposure time, indicating that the effective release of reactive oxygen species under light irradiation is the main reason for the material's antibacterial ability. After 30 minutes of light irradiation, the TV-NC500@F evaporator achieved antibacterial rates of 94.0% and 99.7% against *E. coli* and *S. aureus*, respectively. After 60 minutes of light irradiation, the TV-NC500@F evaporator achieved 100% antibacterial rates against both *E. coli* and *S. aureus*, demonstrating excellent antibacterial capabilities.

[0077] To investigate the ability of different evaporators to degrade water containing organic pollutants, a photodegradation experiment was conducted on MB (methylene blue) solution to evaluate its photocatalytic activity. (See below) Figure 11 As shown in the figure, the TV-NC500@F sample, which has both nitrogen doping and oxygen vacancies, exhibits the best photocatalytic degradation ability of methylene blue (an organic compound), achieving a removal rate of 98.1% after 100 minutes of irradiation. In contrast, the T-NC500@F sample without oxygen vacancies shows slightly weaker photocatalytic degradation ability, with a removal rate of 94.7%.

[0078] The columnar evaporator provided in this embodiment has a section or the entire length of it as a multi-convex column, that is, multiple protrusions are formed on the periphery of the column. When the columnar evaporator is working, compared with the evaporator without protrusions, the evaporation area is effectively increased, and the corresponding evaporation flux is gradually increased. The evaporation flux reaches the highest at the protrusion position. This is because the protrusion is more conducive to the diffusion of water vapor, which can realize the targeted evaporation of water vapor and the targeted collection of salt. The surface of the column is coated with photothermal material, which is conducive to the evaporator absorbing sunlight and accelerating the water evaporation, purification and sterilization process.

[0079] Example 2

[0080] This embodiment provides a columnar evaporation device that integrates seawater purification, sterilization, and fixed-point salt deposition. (Refer to...) Figure 11 and Figure 12 As shown, the device includes a base 2, which contains at least one cylindrical evaporator that integrates seawater purification, sterilization, and fixed-point salt deposition. The base 2 has openings to allow seawater to enter. The top of the base 2 is equipped with a transparent or semi-transparent top cover 3, which is detachable from the base. A water outlet pipe 4 is provided on the side of the base, located near the bottom of the top cover. The water outlet pipe extends from the side of the base, and a container can be placed at the outlet end of the water outlet pipe to collect condensate.

[0081] The base 1 is specifically cylindrical. The base can be made of acrylic sheet with high light transmittance. The top of the base is provided with an opening, that is, the top of the base is open. Seawater enters the base through the opening at the top of the base and is desalinated by the evaporator.

[0082] It is easy to understand that a limiting mesh is set inside the base 1, and the limiting mesh is set with limiting holes that are adapted to the columns. Each column is inserted into the corresponding limiting hole, which effectively prevents the evaporator from tilting.

[0083] To provide stable support for the top cover, the base has a first recess 2-1 and a second recess 2-2 on the top. The first recess is located outside the second recess and is used to fit with the top cover. The second recess is connected to the water outlet pipe. The top cover is inserted into the first recess. A partition is provided between the second recess and the first recess. The second recess has a slope that is lower than itself. The lowest point of the slope is connected to the water outlet pipe.

[0084] In addition, the top cover 3 is hemispherical in shape. The hemispherical shape of the top cover allows the evaporator to receive sunlight to the maximum extent and also allows the condensed water to flow down in time.

[0085] In addition, the present invention also provides a method for operating a columnar evaporation device that integrates seawater purification, sterilization, and fixed-point salt deposition, including the following:

[0086] At least one column is set in the base, and the distance between two adjacent columns is set;

[0087] Place the top cover on top of the base;

[0088] Add seawater to the base;

[0089] Seawater evaporates to form water vapor, which condenses upon contact with the top cover. The condensed water then flows under the influence of the top cover and is discharged through the outlet pipe.

[0090] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A columnar evaporator integrating seawater purification, sterilization, and fixed-point salt deposition, characterized in that: Including a column, a section or the entire length of the column is a multi-convex column, that is, the column is circumferentially provided with convex parts, the number of angles of the multi-convex column is greater than or equal to 3, the center line of the convex part of the multi-convex column is set along the radial direction of the multi-convex column, or the convex part of the multi-convex column is located in the tangential direction of the column or is inclined to the side of the column; The surface of the column is coated with photothermal material; The column is a multi-convex column along its entire length, and the multi-convex column is a dodecagonal star column; The multi-convex cylinder includes a circular cylinder, and multiple protrusions are provided on the periphery of the circular cylinder, with each protrusion having a predetermined length. The length of the protrusion is 1 / 5 to 1 / 3 of the diameter of the cylindrical body; The width of the side of the protrusion away from the cylindrical body is less than or equal to the width of the side closest to the cylindrical body.

2. The columnar evaporator integrating seawater purification, sterilization, and fixed-point salt deposition as described in claim 1, characterized in that, When the cross-section of the multi-convex prism is a regular multi-convex prism, the cross-section of the convex part of the multi-convex prism is an isosceles triangle.

3. The columnar evaporator integrating seawater purification, sterilization, and fixed-point salt deposition as described in claim 1, characterized in that, The photothermal material is a carbon-loaded, nitrogen-doped titanium dioxide material containing oxygen vacancies.

4. The columnar evaporator integrating seawater purification, sterilization, and fixed-point salt deposition as described in claim 3, characterized in that, The preparation process of the carbon-supported nitrogen-doped titanium dioxide material containing oxygen vacancies includes the following: Phthalic acid, benzoic acid completely dissolved in N,N-dimethylformamide, and anhydrous methanol are mixed, and tetrabutyl titanate is added and stirred for a set time to obtain a mixed solution. The mixed solution is poured into a reaction vessel and reacted at a set temperature for a set time to obtain a solid. The solid was cleaned, and after cleaning, it was calcined in a nitrogen atmosphere to obtain titanium oxide material.

5. A columnar evaporation device integrating seawater purification, sterilization, and fixed-point salt deposition, characterized in that: The device includes a base, and at least one cylindrical evaporator integrating seawater purification, sterilization, and fixed-point salt deposition is provided inside the base as described in any one of claims 1-4. The base is provided with an opening to allow seawater to enter the base. A transparent or semi-transparent top cover is provided on the top of the base, and the top cover is detachable from the base. A water outlet pipe connected to the top of the base is provided on the side of the base.

6. The columnar evaporation device integrating seawater purification, sterilization, and fixed-point salt deposition as described in claim 5, characterized in that, The opening is provided at the bottom of the base; The base is provided with a limiting mesh, and the limiting mesh is provided with limiting holes that are adapted to the column.

7. The columnar evaporation device integrating seawater purification, sterilization, and fixed-point salt deposition as described in claim 5, characterized in that, The base has a first recess and a second recess on its top. The first recess is located outside the second recess. The first recess is used to cooperate with the top cover, and the second recess is connected to the water outlet pipe. The top cover is hemispherical in shape.

8. The working method of the columnar evaporator integrating seawater purification, sterilization, and fixed-point salt formation as described in claim 5, characterized in that, Includes the following: At least one column is set in the base, and the distance between two adjacent columns is set. Place the top cover on top of the base; Add seawater to the base; Seawater evaporates to form water vapor, which condenses upon contact with the top cover. The condensed water then flows under the influence of the top cover and is discharged through the outlet pipe.

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