Continuous flow photocatalytic reactor and water purifying device
By designing a continuous flow photocatalytic reactor, using light-transmitting materials and small spheres loaded with photocatalysts, combined with concave and convex structures, the problem of low contact between the catalyst and the substance to be treated is solved, and the photocatalytic reaction rate and the effect of dye degradation are significantly improved. .
Patent Information
- Application Number
- CN202421134042.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-23
AI Technical Summary
In the existing photocatalytic reactor, the catalyst is fixed on the support, resulting in a low degree of contact between the catalyst and the substance to be treated, which affects the performance of the catalytic effect.
A continuous flow photocatalytic reactor is designed, and the inner shell and outer shell made of light-transmitting material are arranged to provide a catalytic light source in the first space, fill a small ball of the photocatalyst loaded in the second space, and at the water inlet and Concave and convex structures are arranged between the water outlets to improve mass transfer efficiency.
By improving the mass transfer efficiency and the excitation efficiency of the photocatalyst, the photocatalytic reaction rate and the degradation effect of the pollutants are significantly improved. Compared with related technologies, the degradation effect and reaction rate of organic pollutants can be greatly improved.
Smart Images
Figure CN222454636U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water purification equipment, in particular to a continuous flow photocatalytic reactor and a water purification device. Background Art
[0002] Photocatalytic technology is a stable, efficient and environmentally friendly technology with broad application prospects. It has been widely recognized by the industry and beyond for its ability to effectively degrade various harmful substances in water bodies. Compared with traditional water purification methods such as physical removal, biological treatment and chemical degradation, it has the advantages of easy reaction conditions, harmlessness to the human body and the environment, relatively low cost and good durability.
[0003] At present, depending on the state of the catalyst, photocatalytic reactors generally include three types: suspended, fixed bed and membrane assembly coupling. Among them, the fixed bed photocatalytic reactor embeds the catalyst in or evenly covers it on a solidified carrier. When irradiated with light of a specific wavelength, it can effectively decompose and degrade the pollutants on the surface of the carrier. Compared with suspended and membrane assembly coupling photocatalytic reactors, it has the advantages of easy catalyst recovery, low maintenance and manufacturing costs.
[0004] However, since the catalyst is fixed on a carrier, this inevitably leads to a relatively low degree of contact between the catalyst and the substance to be treated, thereby affecting the catalytic effect.
[0005] Therefore, how to improve the mass transfer efficiency and the excitation efficiency of photocatalysts, thereby increasing the photocatalytic reaction rate and the degradation effect of dyes, is an important issue that needs to be solved urgently. Utility Model Content
[0006] The utility model provides a continuous flow photocatalytic reactor and a water purification device, which are used to solve the defect in the prior art that the photocatalytic rate is affected by the mass transfer efficiency and is difficult to be further improved, and can improve the mass transfer efficiency, thereby improving the degradation effect of the dye and the photocatalytic reaction rate.
[0007] The utility model provides a continuous flow photocatalytic reactor, comprising: a reaction column;
[0008] The reaction column comprises an inner shell and an outer shell, wherein the inner shell encloses a first space, and a closed second space is enclosed between the inner shell and the outer shell; the inner shell is made of a light-transmitting material, and a water inlet and a water outlet are provided on the outer shell, and both the water inlet and the water outlet are connected to the second space;
[0009] The first space is used to place a catalytic light source, and the second space is used to fill a photocatalytic active unit, wherein the photocatalytic active unit is a small ball loaded with a photocatalyst;
[0010] A concave surface and a convex surface are arranged on the inner wall of the second space, and the concave surface and the convex surface are arranged between the water inlet and the water outlet.
[0011] According to a continuous flow photocatalytic reactor provided by the utility model, the concave surface and the convex surface are arranged alternately.
[0012] According to a continuous flow photocatalytic reactor provided by the utility model, the convex surface and the concave surface are arranged on the inner shell, so that the inner wall of the first space is formed into a concave-convex surface structure accordingly;
[0013] or the convex surface and the concave surface are arranged on the inner wall of the outer shell;
[0014] Or the convex surface and the concave surface are arranged on the outer wall of the inner shell and the inner wall of the outer shell.
[0015] According to a continuous flow photocatalytic reactor provided by the utility model, the convex surface and the concave surface are both arc surfaces, and the connection between the convex surface and the concave surface has a smooth transition.
[0016] According to a continuous flow photocatalytic reactor provided by the utility model, the water inlet is arranged at the bottom end of the reaction column, and the water outlet is arranged at the top end of the reaction column.
[0017] According to a continuous flow photocatalytic reactor provided by the utility model, the small balls include glass beads and alumina small balls.
[0018] According to a continuous flow photocatalytic reactor provided by the utility model, the photocatalyst includes BiO(OH) x I 1-x .
[0019] According to a continuous flow photocatalytic reactor provided by the utility model, the catalytic light source includes an LED light strip, and the length of the LED light strip is not less than the length of the reaction column;
[0020] The LED light strip is inserted into the second space along the length direction of the reaction column.
[0021] According to a continuous flow photocatalytic reactor provided by the utility model, it also includes a pump body, and the pump body is connected to the water inlet.
[0022] According to a continuous flow photocatalytic reactor provided by the utility model, the pump body is connected to the water inlet through a hose.
[0023] According to a continuous flow photocatalytic reactor provided by the utility model, at least one reaction column is provided. When more than two reaction columns are provided, different reaction columns are connected in series.
[0024] The utility model also provides a water purification device, comprising any one of the continuous flow photocatalytic reactors described above.
[0025] Beneficial effects:
[0026] 1. The continuous flow photocatalytic reactor and water purification device provided by the utility model, when purifying drinking water, the catalytic light source is arranged in the first space surrounded by the inner shell, the photocatalytic active unit is filled in the second space surrounded by the inner shell and the outer shell, the water to be purified is pumped into the second space from the water inlet of the reaction column, and in the process of the water to be purified flowing through the catalyst, the pollutants in the water contact with the photocatalytic active unit and react and purify under the action of the catalytic light source, and the purified water flows out from the water outlet; since the second space is arranged around the periphery of the first space and the two are separated, it can effectively prevent the pollution of the catalytic light source, and the catalytic light source can also be located at the center of the inner side of the reaction column, so that the water to be purified can be evenly irradiated with light, the light of the catalytic light source is fully utilized, and the harm of strong light escape is avoided. In addition, the concave and convex structures arranged between the water inlet and the water outlet are helpful to cause turbulence in the water flow process, improve the mass transfer efficiency, and can greatly improve the degradation effect and reaction rate of organic pollutants compared with the related technology.
[0027] Second, the use of small balls to load the photocatalyst is conducive to the dispersion of the catalyst in the entire purification column. The water flows between the photocatalytic balls and cooperates with the uneven column to naturally achieve the effect of mass transfer and distribution without the need for additional stirring devices. And compared with plate loading, the catalyst loading amount is increased, which can improve the efficiency of photocatalytic water purification.
[0028] 3. The structure of the reactor has been simplified, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0030] Figure 1 This is one of the structural schematic diagrams of the continuous flow photocatalytic reactor provided by the embodiment of the utility model;
[0031] Figure 2 This is the second structural schematic diagram of the continuous flow photocatalytic reactor provided in the embodiment of the utility model.
[0032] Reference numerals:
[0033] 1. Reaction column; 10. First space; 11. Second space; 12. Water inlet; 13. Water outlet; 14. Concave surface; 15. Convex surface; 2. Catalytic light source; 3. Photocatalytic active unit; 4. Pump body; 5. Hose. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0035] In order to facilitate the understanding of the continuous flow photocatalytic reactor and water purification device provided by the utility model, its application background is first explained. At present, the pollution of water sources by pollutants such as antibiotics has become a prominent problem facing the water supply industry. Photocatalytic technology, as a stable, efficient and environmentally friendly technology with broad application prospects, can effectively degrade various harmful substances in water bodies. Compared with traditional water purification methods such as physical removal, biological treatment and chemical degradation, it has the advantages of easy reaction conditions, harmless to the human body and the environment, relatively low cost and good durability.
[0036] A fixed-bed photocatalytic reactor embeds or evenly covers the catalyst on a solidified carrier. When irradiated with light of a specific wavelength, it can effectively decompose and degrade pollutants on the surface of the carrier. Compared with suspended and membrane-coupled photocatalytic reactors, it has the advantages of easy catalyst recovery, low maintenance and manufacturing costs.
[0037] However, since the catalyst is fixed on a carrier, this inevitably leads to a relatively low degree of contact between the catalyst and the substance to be treated, thereby affecting the catalytic effect.
[0038] Therefore, how to improve the mass transfer efficiency and the excitation efficiency of the photocatalyst, thereby increasing the reaction rate of the photocatalytic reactor, is an important issue that needs to be solved urgently.
[0039] Based on the above, the utility model provides a continuous flow photocatalytic reactor and a water purification device, which can improve the mass transfer efficiency and light energy utilization rate, thereby increasing the reaction rate.
[0040] Combine the following Figure 1 to Figure 2 The utility model describes a continuous flow photocatalytic reactor and a water purification device.
[0041] Reference Figure 1 and Figure 2 A continuous flow photocatalytic reactor comprises a reaction column 1; the reaction column 1 comprises an inner shell and an outer shell; wherein the inner shell encloses a first space 10, and a closed second space 11 is enclosed between the inner shell and the outer shell; the inner shell is made of a light-transmitting material, and a water inlet 12 and a water outlet 13 are provided on the outer shell, and the water inlet 12 and the water outlet 13 are both connected to the second space 11; the first space 10 is used to place a catalytic light source 2, and the second space 11 is used to fill a photocatalytic active unit 3, and the photocatalytic active unit 3 is a small ball loaded with a photocatalyst; a concave surface 14 and a convex surface 15 are provided on the inner wall of the second space 11, and the concave surface 14 and the convex surface 15 are arranged between the water inlet 12 and the water outlet 13.
[0042] In a specific application scenario, when purifying drinking water, the catalytic light source 2 is arranged in the first space 10 surrounded by the inner shell, and the photocatalytic active unit 3 is filled in the second space 11 surrounded by the inner shell and the outer shell. The water to be purified is pumped into the second space 11 from the water inlet 12 of the reaction column 1. During the process of the water to be purified flowing through the photocatalytic active unit 3, the pollutants in the water contact with the photocatalytic active unit 3 and react and purify under the action of the catalytic light source 2, and the purified water flows out from the water outlet 13; since the second space 11 is arranged around the first space 10 is arranged around the periphery and the two are separated, which can effectively prevent the pollution of the catalytic light source 2 and make the catalytic light source 2 located at the center of the inner side of the reaction column 1. In this way, the water to be purified can be evenly irradiated with light, the light of the catalytic light source 2 is fully utilized, and the harm of strong light escape is avoided. In addition, the concave surface 14 and the convex surface 15 structure arranged between the water inlet 12 and the water outlet 13 are helpful to cause turbulence in the water flow process and improve the mass transfer efficiency. Compared with the related technology, the degradation effect and reaction rate of organic pollutants can be greatly improved.
[0043] In addition, the use of small balls to load the photocatalyst is conducive to the dispersion of the catalyst in the entire reaction column 1. The water flows between the photocatalytic active units 3 and cooperates with the uneven reaction column 1 to naturally achieve the effect of mass transfer and distribution without the need for an additional stirring device. In addition, compared with plate loading, the catalyst loading amount is increased, which can improve the photocatalytic water purification efficiency.
[0044] In a specific embodiment of the present invention, the reaction column 1 is cylindrical in shape as a whole.
[0045] The specific material of each component in the reaction column 1 can be selected according to actual needs. Since the inner shell needs to be light-transmitting, the inner shell can be made of light-transmitting materials such as glass and acrylic. Light transmission is not a necessary characteristic of the outer shell. Therefore, the outer shell can be made of either light-transmitting material or light-opaque material such as metal. When the outer shell is made of light-transmitting material, its material can be the same as or different from that of the inner shell. However, in actual production, in order to facilitate the production and processing of the reaction column 1, the inner shell and the outer shell can be integrally formed with the same material.
[0046] Of course, the reaction column 1 includes but is not limited to the above-mentioned shape, structure and material, and can be flexibly designed according to actual needs and application scenarios.
[0047] In actual applications, the water to be purified enters the second space 11 from the water inlet 12 for photocatalytic reaction purification, and the purified water is discharged from the water outlet 13. In the process of the water to be purified flowing from the water inlet 12 to the water outlet 13, the concave surface 14 and the convex surface 15 on the inner wall of the second space 11 will cause the water flow to be in a turbulent state. In the turbulent state, there are various irregular flow structures such as rotation, eddy current and turbulence in the fluid. These structures will lead to intensified mixing and diffusion between fluid molecules, and will cause different parts of the fluid to continuously mix and tumble, and the mass transfer interface in the fluid will become more complex and irregular, thereby increasing the mass transfer interface area and improving the mass transfer efficiency.
[0048] In a specific embodiment of the present invention, both the concave surface 14 and the convex surface 15 are arc surfaces, and the connection between the convex surface 15 and the concave surface 14 is smoothly transitioned.
[0049] In a specific embodiment of the utility model, the concave surface 14 and the convex surface 15 are arranged on the outer wall of the inner shell, and the inner wall of the inner shell is correspondingly formed into a concave and convex surface structure. In this way, the illumination area can be increased, so that the light of the catalytic light source 2 can be fully utilized, while ensuring the flatness of the outer wall of the outer shell, that is, the outer surface of the reaction column 1.
[0050] It can be understood that the concave surface 14 and the convex surface 15 include but are not limited to the above-mentioned shapes, structures, arrangements and layout positions, and concave and convex surfaces of other shapes, structures and layouts can also be applicable, as long as the water flow passing through the concave and convex surfaces can be in a turbulent state. For example, in other embodiments, the convex surface 15 and the concave surface 14 can also be arranged on the inner wall of the outer shell; or the convex surface 15 and the concave surface 14 are arranged on the outer wall of the inner shell and the inner wall of the outer shell.
[0051] In a specific embodiment of the utility model, the water inlet 12 is arranged at the bottom end of the reaction column 1, and the water outlet 13 is arranged at the top end of the reaction column 1; in this arrangement, the water to be purified enters from the bottom end of the reaction column 1 and gradually fills the second space 11, and the purified water is discharged from the top end of the reaction column 1. In this way, it can be ensured that the water in the second space 11 is always in a full state, so as to exert the maximum column effect.
[0052] In order to facilitate the separation and recycling of the photocatalytic active unit 3, in the embodiment of the utility model, the photocatalytic active unit adopts a small ball loaded with a photocatalyst. There are many choices of small balls as photocatalyst carriers, including zeolite, ceramic, glass, silica gel, activated carbon, porous adsorbent, etc., and the specific selection can be made by comprehensively considering factors such as cost, catalyst activity, and stability requirements.
[0053] Similarly, photocatalysts are also selectable, for example, semiconductor photocatalysts, metal complexes, composite photocatalysts, etc. The specific selection can be based on actual needs, as long as the required photocatalytic reaction requirements can be met.
[0054] In addition, according to the selection of different carriers and photocatalysts, a suitable loading method can be used to prepare the photocatalytic active unit 3, such as liquid phase deposition method, sol-gel method, ion exchange method, solvent thermal crystallization method and powder sintering method, etc. The specific operation process of the above loading method can refer to the existing technology and will not be repeated in the embodiments of the present utility model.
[0055] In this embodiment, the beads used as the photocatalyst carrier are glass beads or alumina beads, and the photocatalyst is BiO(OH) x I 1-x Solid solution, BiO(OH) x I 1-x Solid solutions have the advantages of low cost, simple preparation, high photocatalytic activity and good stability, and are suitable for large-scale practical applications.
[0056] In practical applications, glass beads or alumina balls loaded with photocatalysts are filled into the second space 11. Under the action of the catalytic light source 2, pollutants in the water are catalytically decomposed. The glass beads or alumina balls can avoid the subsequent complicated solid-liquid separation operation, which is beneficial to the recovery of the photocatalytic active unit 3.
[0057] In a specific embodiment of the present invention, the catalytic light source 2 can be an LED light strip, the length of the LED light strip is not less than the length of the reaction column 1 , and the LED light strip is inserted into the second space 11 along the length direction of the reaction column 1 .
[0058] LED light sources have the characteristics of low power, high brightness and low heat generation, making the device energy-saving, efficient and stable light source. At the same time, the long light strip structure fits the shape characteristics of the purification column very well, ensuring uniform light source illumination while also having the advantages of easy construction and operation and high safety.
[0059] In a specific embodiment of the utility model, the continuous flow photocatalytic reactor also includes a pump body 4. Specifically, the pump body can adopt a peristaltic pump. The outlet of the peristaltic pump is connected to the water inlet 12 of the reaction column 1 to pump the water to be purified into the reaction column 1.
[0060] Specifically, the peristaltic pump is connected to the water inlet 12 of the reaction column 1 through a hose 5 .
[0061] It can be understood that in the continuous flow photocatalytic reactor disclosed in the embodiment of the utility model, there can be one reaction column 1 or more than two reaction columns 1. When there are more than two reaction columns 1, adjacent reaction columns 1 are connected in series, and the series connection means that the water outlet 13 of the reaction column 1 is connected to the water inlet 12 of the adjacent reaction column 1. In this way, the continuous flow photocatalytic reactor can be applied to water purification of different scales.
[0062] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.
[0063] It should be pointed out that the above-mentioned continuous flow photocatalytic reactor can be applied to the purification of drinking water, but not only to the purification of drinking water. The embodiments of the present utility model do not exclude the application of the continuous flow photocatalytic reactor in the purification of other fluids.
[0064] The water purification device provided by the utility model is described below. The water purification device described below and the continuous flow photocatalytic reactor described above can be referred to each other.
[0065] A water purification device comprises the above-mentioned continuous flow photocatalytic reactor.
[0066] The novelty of the utility model is that when purifying drinking water, the catalytic light source 2 is arranged in the first space 10 surrounded by the inner shell, the photocatalytic active unit 3 is filled in the second space 11 surrounded by the inner shell and the outer shell, the water to be purified is pumped into the second space 11 from the water inlet 12 of the reaction column 1, and during the process of the water to be purified flowing through the photocatalytic active unit 3, the pollutants in the water contact with the photocatalytic active unit 3 and react and purify under the action of the catalytic light source 2, and the purified water flows out from the water outlet 13; since the second space 11 is arranged around the first space The outer periphery of the space 10 and the separation of the two can not only effectively prevent the pollution of the catalytic light source 2, but also make the catalytic light source 2 located at the center of the inner side of the reaction column 1, so that the water to be purified can be evenly irradiated with light, the light of the catalytic light source 2 is fully utilized, and the harm of strong light escape is avoided. In addition, the concave surface 14 and the convex surface 15 structure arranged between the water inlet 12 and the water outlet 13 are helpful to cause turbulence in the water flow process and improve the mass transfer efficiency. Compared with the related technology, the degradation effect and reaction rate of organic pollutants can be greatly improved.
[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A continuous flow photocatalytic reactor, characterized in that: include: Reaction column (1); The reaction column (1) comprises an inner shell and an outer shell, the inner shell encloses a first space (10), and a closed second space (11) is enclosed between the inner shell and the outer shell; the inner shell is made of a light-transmitting material, and the outer shell is provided with a water inlet (12) and a water outlet (13), and the water inlet (12) and the water outlet (13) are both connected to the second space (11); The first space (10) is used to place a catalytic light source (2), and the second space (11) is used to fill a photocatalytic active unit (3), wherein the photocatalytic active unit (3) is a small ball loaded with a photocatalyst; A concave surface (14) and a convex surface (15) are provided on the inner wall of the second space (11), and the concave surface (14) and the convex surface (15) are arranged between the water inlet (12) and the water outlet (13).
2. The continuous flow photocatalytic reactor according to claim 1, characterized in that: The concave surfaces (14) and the convex surfaces (15) are arranged alternately.
3. The continuous flow photocatalytic reactor according to claim 2, characterized in that: The convex surface (15) and the concave surface (14) are arranged on the inner shell, so that the inner wall of the first space (10) is correspondingly formed into a concave-convex surface structure; or the convex surface (15) and the concave surface (14) are arranged on the inner wall of the outer shell; Or the convex surface (15) and the concave surface (14) are arranged on the outer wall of the inner shell and the inner wall of the outer shell.
4. The continuous flow photocatalytic reactor according to claim 1, characterized in that: The water inlet (12) is arranged at the bottom end of the reaction column (1), and the water outlet (13) is arranged at the top end of the reaction column (1).
5. The continuous flow photocatalytic reactor according to claim 1, characterized in that: The beads include glass beads and alumina beads.
6. The continuous flow photocatalytic reactor according to claim 5, characterized in that: The photocatalyst comprises BiO(OH) x I 1-x .
7. The continuous flow photocatalytic reactor according to claim 1, characterized in that: The catalytic light source (2) comprises an LED light strip, the length of which is not less than the length of the reaction column (1); The LED light strip is inserted into the second space (11) along the length direction of the reaction column (1).
8. The continuous flow photocatalytic reactor according to claim 1, characterized in that: It also comprises a pump body (4), wherein the pump body (4) is connected to the water inlet (12).
9. The continuous flow photocatalytic reactor according to any one of claims 1 to 8, characterized in that: At least one reaction column (1) is provided. When two or more reaction columns (1) are provided, different reaction columns (1) are connected in series.
10. A water purification device, characterized in that: It comprises a continuous flow photocatalytic reactor as described in any one of claims 1 to 9.