An assembled reaction cylinder for activating the catalytic oxidation function of ultraviolet germicidal lamps

Abstract

This invention relates to the field of environmental water treatment and discloses an assembled reaction cylinder for activating the catalytic oxidation function of an ultraviolet (UV) germicidal lamp. The cylinder includes: an existing UV lamp and its sleeve, a splicing shroud, a splicing assembly, an end-sealing plate, an annular perforated plate, a first oxidant inlet, a second oxidant inlet, a third oxidant inlet, an oxidant pumping assembly, a monitoring assembly, and an electrical control assembly. The perforated shroud is located outside the existing UV lamp sleeve, with both ends sealed by end-sealing plates, enclosing the UV lamp sleeve within the shroud. An annular gap cavity is formed between the inner wall of the perforated shroud and the outer wall of the UV lamp sleeve. The first, second, and third oxidant inlets are all located within the annular gap cavity. The oxidant pumping assembly is used to transport various stored oxidants into the annular gap cavity. This invention upgrades and transforms existing UV germicidal lamps in water treatment projects using an integrated oxidant distributor to expand and enhance the photocatalytic oxidation function of the UV lamp.

Description

Technical Field

[0001] This invention relates to the field of environmental water treatment, specifically to an assembled reaction cylinder for activating the catalytic oxidation function of an ultraviolet germicidal lamp. Background Technology

[0002] In recent years, my country has increasingly emphasized the treatment of new pollutants in water bodies, and has successively strengthened the treatment of new pollutants through policy documents. However, traditional treatment methods, represented by activated sludge processes, have limited effectiveness in treating new pollutants. Common methods for efficiently removing new pollutants include adsorption, membrane processes, and advanced oxidation processes. Adsorption is flexible and simple to operate, and has good adsorption capacity for some antibiotic-like new pollutants. However, in practical applications, the adsorbent needs to be treated again after use. Some literature reports that membranes have good removal effects on more than 70% of new pollutant types; however, membrane modules are expensive, prone to clogging, and difficult to regenerate, thus hindering large-scale engineering applications. Advanced oxidation processes have the technical advantages of high reactivity and strong degradation capacity, and can mineralize a variety of new pollutants. Among them, advanced oxidation systems based on free radical generation and enhancement, combined with green and eco-friendly catalysts, show good prospects for engineering applications.

[0003] Ultraviolet lamps are environmentally friendly, pollution-free, and highly efficient water purification and disinfection devices. They come in various forms and categories, with the most common being the ultraviolet lamp tubes commonly used in water purification facilities for ultraviolet disinfection. Due to their ease of implementation, simple operation, and significant effects, they have a very wide range of applications.

[0004] The aforementioned ultraviolet lamps can emit ultraviolet light with a short wavelength (λ < 400 nm). Ultraviolet light can not only rapidly denature proteins, thereby effectively killing almost all bacteria and pathogens in the water, but also, when the wavelength is short and the dosage is large, it can directly photolyze organic matter in the water (reactions 1-4).

[0005] R + hν(λ < 185 nm) → R * (1)

[0006] R * → ·R1 +·CH2CH3 (2)

[0007] ·R1 + hν(λ <185 nm)→ ·I i (i = 1, 2, ..., n) (3)

[0008] ·I i + ·I i → P (4)

[0009] Building upon conventional ultraviolet lamp disinfection and water purification technology, and combining it with photocatalytic oxidation technology, an advanced oxidation water purification technology synergistic with ultraviolet light and semiconductor photocatalytic materials can be developed. This technology effectively stimulates the generation of reactive free radicals such as hydroxyl radicals (·OH) in water. Through the addition, substitution, electron transfer, and bond breaking interactions between these reactive free radicals and organic compounds, large organic molecules are degraded into smaller molecules, or even directly degraded into carbon dioxide (CO2) and water (H2O), thus achieving water purification. These reactive free radicals also include excited-state oxygen atoms (O... 1 D) Superoxide radicals (HO2) ·- / O2 ·- ), singlet oxygen ( 1 O2 and other similar substances also have strong oxidizing properties and can undergo mineralization reactions similar to ·OH to achieve water purification (reactions 5-8).

[0010] H2O + hν →·OH +·H (5)

[0011] R +·OH → ROH (6)

[0012] R +·OH → ·R + H2O (7)

[0013] R n +·OH → R n-1 + OH - (8)

[0014] Related studies have shown that the combined use of multiple oxidants and ultraviolet photocatalysis technology can further improve the disinfection and purification efficiency of water bodies, achieving significant improvements compared to using a single oxidant or ultraviolet photocatalysis alone. For example, the reaction of ozone with organic matter is selective and cannot completely decompose organic matter into CO2 and H2O; however, the combined use of ozone and ultraviolet photocatalysis technology can effectively improve water purification and disinfection efficiency. The working principle of the combined use of ozone and ultraviolet photocatalysis technology for water purification and deodorization is shown in reaction formula 9-11, where O3 represents ozone, UV represents ultraviolet radiation, hv represents photolysis, and O 1 D represents an excited-state oxygen atom, ·OH represents a hydroxyl radical, and H2O2 represents hydrogen peroxide.

[0015] O3 + UV(or hν, λ < 310 nm) → O2 + O( 1 D) (9)

[0016] O( 1 D) + H₂O → ·OH + ·OH → H₂O₂ (in water) (10)

[0017] O( 1D) + H₂O → ·OH + ·OH (humid air) (11)

[0018] For example, the combined use of ozone and hydrogen peroxide can also produce a coupling enhancement effect, and its reaction principle is shown in reaction formula (12).

[0019] 2O3 + H2O2 → ·OH + ·OH + 3O2 (12)

[0020] Chlorine dioxide and hydrogen peroxide react to produce hypochlorous acid, a strong oxidizing agent.

[0021] 2ClO2 + H2O2 → 2HClO2 + O2 (13)

[0022] The combined use of hydrogen peroxide and ultraviolet photocatalysis also has a coupling enhancement effect:

[0023] H2O2+UV (or hν, λ≈200~280nm)→·OH+·OH (14)

[0024] Another example is the combination of chlorine dioxide solution and ultraviolet light (R represents organic reactant, R* represents organic reaction product):

[0025] R + ClO2 → R * +ClO2 - (15)

[0026] ClO2 - +hν(λ<300nm)→2O( 1 D)+Cl - (16)

[0027] However, on the one hand, the ultraviolet lamps in existing water purification facilities only perform ultraviolet disinfection, failing to fully utilize the inherent energy of the ultraviolet lamps to achieve the water purification effect of ultraviolet photocatalysis. In fact, the ultraviolet irradiation intensity of existing disinfection ultraviolet lamps at the pipe wall is relatively high (generally reaching 5000W / m). 2 (As mentioned above), if the high-intensity ultraviolet radiation near the wall of the ultraviolet lamp can be fully utilized, and sufficient oxidants such as O3, H2O2, and ClO2 are supplied to this area, supplemented by the catalytic effect of photocatalysts such as black titanium and titanium dioxide, the above-mentioned chemical reaction can be activated, generating a large number of active free radicals, which can effectively purify and enhance the disinfection of water. On the other hand, existing ultraviolet lamps for disinfection usually have a quartz tube sleeve encapsulated outside the lamp tube for protection. The water directly contacts the outer wall of the outer sleeve, and the ultraviolet lamp generates high temperatures during long-term operation, causing the outer wall of the outer sleeve to easily form scale, which is very difficult to clean. Therefore, if sufficient oxidants can be supplied near the outer wall of the existing ultraviolet lamp sleeve, and the ultraviolet lamp sleeve is relatively isolated from the water to be treated, the problem of high-temperature scaling of the sleeve can be significantly avoided.

[0028] To maximize the functionality of ultraviolet lamps, this invention proposes to appropriately modify the ultraviolet lamp sleeves used for disinfection in existing water purification plants or facilities (including but not limited to tap water, reclaimed water, water resource recycling, urban water treatment, and industrial wastewater treatment). This modification enables the continuous and large-scale generation and diffusion of active free radicals, thereby significantly improving water purification and disinfection performance, and also makes it easier to clean the ultraviolet lamp sleeves. Summary of the Invention

[0029] The technical problem to be solved by the present invention is to overcome the defects of conventional ultraviolet lamps in the prior art, such as difficulty in effectively generating active free radicals, poor water purification effect, and easy scaling and cleaning of the outer tube. The present invention proposes to make appropriate modifications to the existing ultraviolet lamps and provide an assembled reaction cylinder for activating the catalytic oxidation function of ultraviolet germicidal lamps.

[0030] The present invention solves the above-mentioned technical problems through the following technical solution:

[0031] An assembled reaction cylinder for activating the catalytic oxidation function of an ultraviolet germicidal lamp, used for water purification, the assembled reaction cylinder includes: an ultraviolet lamp sleeve, a splicing cover, a splicing assembly, an end sealing plate, an annular perforated plate, a first oxidant inlet, a second oxidant inlet, a third oxidant inlet, an oxidant pumping assembly, a monitoring assembly, and an electrical control assembly.

[0032] The ultraviolet lamp sleeve is a quartz outer tube sleeve that encapsulates the ultraviolet lamp used for disinfection in existing water purification facilities; the mesh cover is located outside the existing ultraviolet lamp sleeve, and both ends of it are sealed with end sealing plates to enclose the ultraviolet lamp sleeve inside the cover. An annular gap cavity is formed between the inner wall of the mesh cover and the outer wall of the ultraviolet lamp sleeve; the ultraviolet lamp sleeve and the spliced ​​cover are coaxially arranged.

[0033] In this solution, by appropriately modifying the existing UV lamp sleeves for disinfection, it is possible to achieve the continuous and large-scale generation and diffusion of active free radicals, thereby significantly improving the water purification and disinfection performance, and making it easier to clean the UV lamp sleeves.

[0034] In addition, the oxidant pumping assembly is used to store multiple oxidants and pressurize and deliver multiple oxidants to the first, second, and third oxidant inlets connected thereto as needed; the first, second, and third oxidant inlets are all located in the annular gap cavity and are used to deliver multiple oxidants from the oxidant pumping assembly to the annular gap cavity.

[0035] In this solution, the combined action of the UV lamp sleeve and the oxidant effectively stimulates the generation of reactive free radicals such as hydroxyl radicals in the water. These reactive free radicals then interact with organic compounds in the water through addition, substitution, electron transfer, and bond breaking, causing large organic molecules to degrade into smaller molecules, or even directly into carbon dioxide and water, thus achieving water purification. This is particularly effective against persistent organic pollutants, antibiotics, endocrine disruptors, and other emerging pollutants. By placing the UV lamp sleeve within the spliced ​​enclosure, an annular gap cavity is formed between them. Within this annular gap cavity, the concentration of the reaction substrate (oxidant) is high, enhancing and accelerating the reaction efficiency, continuously generating reactive free radicals, which diffuse from the through-holes on the side of the spliced ​​enclosure into the water disinfection zone, thereby achieving highly efficient purification and enhanced disinfection of the water outside the spliced ​​enclosure.

[0036] Preferably, the shape of the splicing cover is a part of the side surface of the tube, and several splicing covers of the same specifications can be spliced ​​together to form a complete tube. The splicing cover is made of a material that is resistant to ultraviolet aging, high temperature, high light transmittance, and high strength, such as quartz, and has several through holes at appropriate locations. Its inner wall and / or outer wall are coated with an ultraviolet catalyst, which is one or more of black titanium, titanium dioxide, zinc oxide, tin oxide, or zirconium dioxide. Adjacent splicing covers are connected by splicing components to tightly connect them and ensure no gaps. The splicing components can be fixed by means of adhesive, welding, slotting, bolts, rivets, etc., to ensure a seal.

[0037] In this design, the splicing cover is incorporated as part of a transparent tube, allowing ultraviolet light to be refracted or transmitted outside the tube. Multiple through-holes are formed on the sidewall of the transparent tube, enabling the high concentration of active free radicals generated within the annular gap cavity to flow out through these holes into the water outside the tube, thus purifying the water outside the tube. Furthermore, coating the inner and / or outer walls of the transparent tube with an ultraviolet photocatalyst promotes ultraviolet catalysis under irradiation, increasing the efficiency of active free radical generation and enhancing the water purification effect of the ultraviolet catalytic oxidation equipment.

[0038] Preferably, two end sealing plates are provided at both ends of the splicing cover; the end sealing plates are fan-shaped, have no holes on the surface, and fit perfectly with the inner wall of the splicing cover and the outer wall of the ultraviolet lamp sleeve. The fitting can be fixed by means of adhesive, welding, slotting, bolts, rivets, etc., to ensure a seal.

[0039] Preferably, two or more annular perforated plates are provided in the annular gap cavity; the annular perforated plates are fan-shaped, with several through holes on their surface, and are sealed and engaged with the inner wall of the splicing cover and the outer wall of the ultraviolet lamp sleeve. The engagement can be fixed by means of bonding, welding, slotting, bolts, rivets, etc., to ensure a seal.

[0040] Preferably, a first oxidant inlet is provided between the end sealing plate in the annular gap cavity and its nearest annular perforated plate, and the splicing cover in this space does not have through holes; the first oxidant is sprayed from the first oxidant inlet toward the radial direction of the splicing cover into the annular gap cavity, and then sprayed through the through holes of the annular perforated plate toward the axial direction of the splicing cover into the annular gap cavity outside the annular perforated plate, where a high concentration of active free radicals are generated under the excitation of high intensity ultraviolet light in the annular gap cavity, and then flow out from the through holes on the surface of the splicing cover.

[0041] Preferably, a second oxidant inlet is provided between two closely spaced adjacent annular perforated plates in the annular gap cavity, and the splicing cover in this space does not have through holes; the second oxidant is sprayed from the second oxidant inlet toward the radial direction of the splicing cover into the annular gap cavity, and then the second oxidant is sprayed through the through holes of the two annular perforated plates toward the axial direction of the splicing cover into the annular gap cavity outside the annular perforated plates, and under the excitation of high intensity ultraviolet light in the annular gap cavity, a high concentration of active free radicals are generated, and then flow out from the through holes on the surface of the splicing cover.

[0042] Preferably, a third oxidant inlet is provided between two adjacent annular perforated plates that are far apart in the annular gap cavity, and the splicing cover body in this space has several through holes; the third oxidant is sprayed from the third oxidant inlet into the annular gap cavity in the radial direction of the splicing cover body, and under the excitation of high intensity ultraviolet light in the annular gap cavity, a high concentration of active free radicals are generated, and then flow out from the through holes on the surface of the splicing cover body.

[0043] In the above scheme, various oxidants are output to the annular gap space through the first, second and third oxidant inlets. In particular, the oxidant is sprayed through the annular perforated plate into the annular gap cavity outside the annular perforated plate in the axial direction of the splicing cover. This improves the input stability and distribution uniformity of the oxidant, so that the active free radicals at various positions in the flow direction inside the splicing cover can maintain a high concentration. This is conducive to the continuous generation of high concentration of active free radicals, which flow out from the through holes on the side of the splicing cover, thereby achieving a highly efficient purification and enhanced disinfection effect on the water outside the splicing cover.

[0044] Preferably, the monitoring component includes a plurality of monitoring probes for monitoring the concentration of pollutants in the water and / or monitoring the intensity of ultraviolet radiation; the plurality of monitoring probes are at least disposed in the water outside the annular gap cavity and the splicing cover.

[0045] In this scheme, by setting up monitoring probes, the concentration of pollutants and / or the intensity of ultraviolet radiation in the water body can be monitored in real time. When the concentration of pollutants in the water body is too high or the intensity of ultraviolet radiation is insufficient, timely feedback can be provided. This also helps to adjust the output of oxidant and the irradiation intensity of the ultraviolet lamp sleeve in a timely manner, which is conducive to the optimal allocation of resources.

[0046] Preferably, the electronic control component is electrically connected to the ultraviolet lamp sleeve and the oxidant pumping component. The electronic control component is used to adjust the irradiation intensity of the ultraviolet lamp sleeve, the dosage of various oxidants pressurized and delivered by the oxidant pumping component, and the opening degree of the flow regulating valve connected to each oxidant inlet according to the pollutant concentration and ultraviolet irradiation intensity fed back by the monitoring probe.

[0047] In this scheme, when the concentration of pollutants in the water is too high or the intensity of ultraviolet irradiation is insufficient, the monitoring component feeds back to the electronic control component. The electronic control component then adjusts the output of the oxidant and the irradiation intensity of the ultraviolet lamp sleeve in a timely manner. This makes the adjustment of the oxidant input dosage and / or the irradiation intensity of the ultraviolet lamp sleeve more convenient and more accurate, which is beneficial to the purification effect of the ultraviolet catalytic device.

[0048] Preferably, multiple assembled reaction cylinders as described above can be combined into a complete set, and the irradiation intensity at the midpoint between two adjacent devices can meet the basic disinfection conditions of the water body.

[0049] In this scheme, by combining the above-mentioned multiple prefabricated reaction cylinders, pollutants at different locations in the water body can be purified, and the pollutant concentration and ultraviolet irradiation intensity in each area of ​​the water body can be monitored in real time. The oxidant input dosage and / or the irradiation intensity of the ultraviolet lamp sleeve can be flexibly adjusted according to the difference in the degree of pollution in each area, so as to achieve the effect of overall water quality purification.

[0050] The positive and progressive effects of this invention are as follows:

[0051] (1) Based on the existing ultraviolet lamp water purification equipment, the high-efficiency continuous excitation and diffusion of active free radicals can be achieved through appropriate modification, and the water purification function of active free radicals can be brought into play, maximizing the value of the ultraviolet lamp equipment and significantly improving the water purification efficiency of the ultraviolet lamp equipment.

[0052] (2) By injecting water and oxides together into the annular gap cavity between the existing UV lamp sleeve and the newly added splicing cover, active free radicals are generated efficiently and continuously in this annular gap cavity. After the high concentration of active free radicals flows out from the small holes opened on the side wall of the splicing cover, they will produce a highly efficient purification and enhanced disinfection effect on the water outside the splicing cover. This can completely offset the slight loss that occurs when ultraviolet rays are transmitted or refracted out of the splicing cover (active free radicals and various oxidants have a further killing effect on microorganisms in the water). Overall, it can significantly improve the water purification and disinfection efficiency.

[0053] (3) By injecting at least one oxidant into the annular gap cavity between the existing UV lamp sleeve and the splicing cover, the UV lamp sleeve and the water are isolated, avoiding direct contact between the UV lamp sleeve and the water being treated. This makes it difficult for the splicing cover to heat up, fundamentally preventing pollutants in the water from forming high-temperature scale on the UV lamp sleeve. Furthermore, the injected oxidant and the activated high-concentration active free radicals have a good cleaning effect on both the UV lamp sleeve and the sidewall of the splicing cover. Attached Figure Description

[0054] Figure 1 A 3D view of the assembled reaction vessel in its "assembled state";

[0055] Figure 2 A 3D view of the assembled reaction vessel in its "disassembled state";

[0056] Figure 3 Cross-sectional view at the central axis of the assembled reaction vessel;

[0057] Figure 4 The assembled reaction cylinder proposed in this invention has an irradiance of 25000 W / m at the outer wall of the ultraviolet lamp tube sleeve. 2 Distribution of ultraviolet irradiance intensity at different spacings on the outside of ultraviolet lamps under certain conditions;

[0058] Figure 5 This is a side view of a complete set of equipment proposed in this invention, which uses four sets of assembled reaction cylinders in coordinated operation;

[0059] Figure 6 This is a schematic diagram illustrating the water purification principle of a complete set of equipment proposed in this invention, which uses four sets of assembled reaction cylinders working in synergy.

[0060] Explanation of reference numerals in the attached figures:

[0061] UV lamp sleeve 1;

[0062] 2. Splicing cover body;

[0063] splicing component 3;

[0064] End sealing plate 41;

[0065] Annular perforated plate 42;

[0066] First oxidant inlet 51;

[0067] Second oxidant inlet 52;

[0068] Third oxidant inlet 53;

[0069] Flow regulating valve 54;

[0070] Oxidant pumping assembly 6 (not shown in the figure);

[0071] Monitoring component 7 (not shown in the diagram);

[0072] Electronic control component 8 (not shown in the figure);

[0073] Oxidizing agent flow direction 9;

[0074] Control point 10. Detailed Implementation

[0075] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0076] This embodiment provides an assembled reaction cylinder for activating the catalytic oxidation function of an ultraviolet germicidal lamp, such as... Figures 1-3 As shown, this prefabricated reaction cylinder is used for water purification in a wastewater treatment plant. The prefabricated reaction cylinder includes: an ultraviolet lamp sleeve 1, a splicing cover 2, a splicing assembly 3, an end sealing plate 41, an annular perforated plate 42, a first oxidant inlet 51, a second oxidant inlet 52, a third oxidant inlet 53, an oxidant pumping assembly 6, a monitoring assembly 7, and an electrical control assembly 8.

[0077] The UV lamp sleeve 1 is a quartz outer tube sleeve that encapsulates the UV lamp used for disinfection in existing water purification facilities; the mesh cover is located outside the existing UV lamp sleeve 1, and both ends of it are sealed with end sealing plates 41 to enclose the UV lamp sleeve 1 inside the cover. An annular gap cavity is formed between the inner wall of the mesh cover and the outer wall of the UV lamp sleeve 1; the UV lamp sleeve 1 and the spliced ​​cover 2 are coaxially arranged.

[0078] In this embodiment, by appropriately modifying the UV lamp sleeve 1 used for disinfection in the existing water purification facility, the continuous and large-scale generation and diffusion of active free radicals can be achieved, thereby significantly improving the water purification and disinfection performance, and making it easier to clean the UV lamp sleeve 1.

[0079] In addition, the oxidant pumping assembly 6 is used to store a variety of oxidants and pressurize and deliver the various oxidants to the first, second and third oxidant inlets 53 connected to it as needed; the first, second and third oxidant inlets 53 are all located in the annular gap cavity and are used to deliver the various oxidants from the oxidant pumping assembly 6 to the annular gap cavity.

[0080] In this embodiment, the combined action of the UV lamp sleeve 1 and the oxidant effectively stimulates the generation of reactive free radicals such as hydroxyl radicals in the water. These reactive free radicals then interact with organic compounds in the water through addition, substitution, electron transfer, and bond breaking, causing large organic molecules to degrade into smaller molecules, or even directly into carbon dioxide and water, thus achieving water purification. This is particularly effective against persistent organic pollutants, antibiotics, endocrine disruptors, and other emerging pollutants. By placing the UV lamp sleeve 1 inside the spliced ​​cover 2, an annular gap cavity is formed between them. Within this annular gap cavity, the concentration of the reaction substrate (oxidant) is high, enhancing and accelerating the reaction efficiency, continuously generating reactive free radicals, and diffusing them from the through-holes on the side of the spliced ​​cover 2 into the water disinfection zone, thereby achieving highly efficient purification and enhanced disinfection of the water outside the spliced ​​cover.

[0081] This allows the generated active free radicals to be concentrated within the annular interstitial cavity, thereby increasing the opportunity for high-concentration active free radicals to come into contact with pollutants such as organic compounds in the water, preventing the active free radicals from being lost or diluted too quickly, and improving the efficiency of oxidation treatment and the effectiveness of disinfection.

[0082] The splicing cover 2 is half the side surface of the circular tube, and two splicing covers 2 of the same specifications can be spliced ​​together to form a complete circular tube. The splicing cover 2 is made of high light transmittance and high strength quartz material, and has several through holes with a diameter of 0.5 cm and a spacing of 2 cm between two adjacent through holes at appropriate positions. Its inner and outer walls are coated with ultraviolet light catalyst, and the catalyst is one or more of black titanium, titanium dioxide, zinc oxide, tin oxide or zirconium dioxide.

[0083] Adjacent splicing covers 2 are connected by splicing components 3 to ensure a tight connection between them without gaps. The splicing components are fixed with bolts to ensure a seal.

[0084] The through holes form a uniform mesh distribution on the axially extending sidewall of the transparent tube 102, with a pore diameter of 0.5 cm and a spacing of 2 cm between two adjacent through holes; the catalyst is black titanium.

[0085] In this embodiment, the splicing cover 2 is set as half of the transparent tube, allowing ultraviolet light to be refracted or transmitted outside the transparent tube. Multiple through-holes are provided on the side wall of the transparent tube, allowing the high concentration of active free radicals generated within the annular gap cavity to flow out through the through-holes into the water outside the transparent tube, thereby purifying the water outside the transparent tube. By coating the inner and / or outer walls of the transparent tube with an ultraviolet photocatalyst, the ultraviolet catalytic effect under ultraviolet irradiation is promoted, increasing the efficiency of generating active free radicals and improving the purification effect of the ultraviolet catalytic oxidation equipment on the water.

[0086] Two end sealing plates 41 are respectively provided at both ends of the splicing cover 2; the end sealing plates 41 are fan-shaped, with no holes on the surface, and are perfectly sealed and engaged with the inner wall of the splicing cover 2 and the outer wall of the ultraviolet lamp sleeve 1. The engagement is fixed by a slot insertion method to ensure a seal.

[0087] Two or more annular perforated plates 42 are provided in the annular gap cavity; the annular perforated plates 42 are fan-shaped, with several through holes on the surface, and are sealed and engaged with the inner wall of the splicing cover 2 and the outer wall of the ultraviolet lamp sleeve 1. The engagement is fixed by a slot insertion method to ensure a seal.

[0088] A first oxidant inlet 51 is provided between the end sealing plate 41 in the annular gap cavity and its nearest annular perforated plate 42. The splicing cover 2 in this space does not have through holes. The first oxidant is sprayed from the first oxidant inlet 51 into the annular gap cavity in the radial direction of the splicing cover 2, and then sprayed through the through holes of the annular perforated plate 42 into the annular gap cavity outside the annular perforated plate 42 in the axial direction. Under the excitation of high intensity ultraviolet light in the annular gap cavity, a high concentration of active free radicals is generated, and then flows out from the through holes on the surface of the splicing cover 2.

[0089] A second oxidant inlet 52 is provided between two closely spaced adjacent annular perforated plates 42 in the annular gap cavity. The splicing cover 2 in this space does not have through holes. The second oxidant is sprayed from the second oxidant inlet 52 into the annular gap cavity in the radial direction of the splicing cover 2. Then, the second oxidant is sprayed through the through holes of the two annular perforated plates 42 into the annular gap cavity outside the annular perforated plates 42 in the axial direction of the splicing cover 2. Under the excitation of high intensity ultraviolet light in the annular gap cavity, a high concentration of active free radicals is generated and flows out from the through holes on the surface of the splicing cover 2.

[0090] Preferably, a third oxidant inlet 53 is provided between two adjacent annular perforated plates 42 that are far apart in the annular gap cavity, and several through holes are opened in the splicing cover 2 in this space; the third oxidant is sprayed from the third oxidant inlet 53 into the annular gap cavity in the radial direction of the splicing cover 2, and under the excitation of high intensity ultraviolet light in the annular gap cavity, a high concentration of active free radicals are generated, and then flow out from the through holes on the surface of the splicing cover 2.

[0091] In this embodiment, various oxidants are output to the annular gap space through the first, second, and third oxidant inlets 53. In particular, the oxidant is sprayed through the annular perforated plate 42 towards the axial direction of the splicing cover 2 into the annular gap cavity outside the annular perforated plate 42, which improves the input stability and distribution uniformity of the oxidant. This allows the active free radicals at various positions in the flow direction inside the splicing cover to maintain a high concentration, which is beneficial to enhance and accelerate the reaction, continuously generate active free radicals, and flow out from the through holes on the surface of the splicing cover 2. This achieves efficient purification and enhanced disinfection of the water outside the splicing cover 2.

[0092] The monitoring component 7 includes multiple monitoring probes for monitoring the concentration of pollutants in the water and / or monitoring the intensity of ultraviolet radiation; the multiple monitoring probes are at least located in the water outside the annular gap cavity and the splicing cover 2.

[0093] In this embodiment, by setting a monitoring probe, the concentration of pollutants and / or the intensity of ultraviolet radiation in the water body can be monitored in real time. When the concentration of pollutants in the water body is too high or the intensity of ultraviolet radiation is insufficient, timely feedback can be provided. This is also beneficial for timely adjustment of the output of oxidant and the irradiation intensity of the ultraviolet lamp sleeve 1, which is conducive to the optimal allocation of resources.

[0094] The electronic control component 8 is electrically connected to the ultraviolet lamp sleeve 1. The electronic control component 8 is used to adjust the irradiation intensity of the ultraviolet lamp sleeve 1 according to the pollutant concentration and ultraviolet irradiation intensity fed back by the monitoring probe.

[0095] In this embodiment, when the concentration of pollutants in the water is too high or the intensity of ultraviolet irradiation is insufficient, the monitoring component 7 provides feedback to the electronic control component 8. The electronic control component 8 then adjusts the output of the oxidant and the irradiation intensity of the ultraviolet lamp sleeve 1 in a timely manner. The adjustment of the irradiation intensity of the ultraviolet lamp sleeve 1 and the opening degree of the flow regulating valve 54 connected to each oxidant inlet are beneficial to the purification effect of the ultraviolet catalytic device.

[0096] Four assembled reaction cylinders as described in this embodiment can be combined into a complete set, and the irradiation intensity at the midpoint between two adjacent devices can meet the basic disinfection conditions of the water.

[0097] In this embodiment, by assembling the above-mentioned multiple prefabricated reaction cylinders, pollutants at different locations in the water body can be purified, and the pollutant concentration and ultraviolet irradiation intensity in each area of ​​the water body can be monitored in real time. The oxidant input dose and / or the irradiation intensity of the ultraviolet lamp sleeve 1 can be flexibly adjusted according to the difference in the degree of pollution in each area, so as to achieve the effect of overall water quality purification.

[0098] In this embodiment, the factory-rated irradiance at the outer wall of the existing ultraviolet lamp sleeve 1 is 25000 W / m.2 The formula for the attenuation of the irradiance of a linear ultraviolet lamp in water is as follows, and its linear attenuation coefficient in water is 1m. -1 .

[0099]

[0100] I′——Illuminance at the observation point (1x, or W / m²) 2 )

[0101] E0 / L — Luminous flux per unit length of the lamp (1m / m, or W / m)

[0102] μ—the linear attenuation coefficient of light in water, typically >1 (m -1 )

[0103] r — Distance from the outer wall of the lamp tube to the observation point (m)

[0104] l — the variable in calculus, from 0 to L l , or from 0 to L2(m)

[0105] Where: L—total length of the lamp tube (m)

[0106] Based on the above formula, the relationship curve between the ultraviolet irradiance monitored by the monitoring probe and the distance between the inner walls of the existing ultraviolet lamp sleeve 1 was fitted using Python programming, as shown in the figure. Figure 4 As shown (Python encoding as shown) Figure 6 (As shown).

[0107] like Figure 4 As shown, the irradiance monitored at the outer wall of the existing UV lamp sleeve 1 (wall thickness 0.1cm) is 25000W / m. 2 The irradiation intensity is high, which can directly photolyze the water, generating a large number of active free radicals; the irradiation intensity monitored at the inner wall of the spliced ​​cover 2 (the gap between the inner wall of the spliced ​​cover 2 and the outer wall of the ultraviolet lamp sleeve 1 is 1.0 cm) is 2617 W / m. 2 This irradiation intensity enables the oxidant to generate a large number of active free radicals under ultraviolet photocatalysis; the irradiation intensity monitored at control point 10 (128.0 cm away from the inner wall of the existing ultraviolet lamp sleeve) outside the splicing cover 2 is 569 W / m. 2 This irradiation intensity is sufficient to inactivate viruses, bacteria, and other microorganisms in water under ultraviolet light irradiation.

[0108] The initial radiation intensity detected at the outer wall of the existing UV lamp sleeve 1 (wall thickness 0.1 cm) decreased to 20300 W / m. 2The irradiation intensity remains high and can directly photolyze the water, generating a large number of active free radicals. The irradiation intensity monitored at the inner wall of the spliced ​​cover 2 (the gap between the inner wall of the spliced ​​cover 2 and the outer wall of the UV lamp sleeve 1 is 1.0 cm) was 1917 W / m². 2 The irradiation intensity is insufficient to cause the oxidant to generate a large number of active free radicals under ultraviolet photocatalysis.

[0109] Secondly, the amount of oxidant injected was increased to clean the outer wall of the UV lamp sleeve 1 and the side wall of the splicing cover 2. After cleaning, the irradiance at the inner wall of the splicing cover 2 was monitored to reach 2059 W / m². 2 However, this is still insufficient to enable the oxidant to generate a large number of active free radicals under ultraviolet photocatalysis.

[0110] Next, the power of the ultraviolet lamps was increased so that the monitoring irradiance at the inner wall of the splicing cover 2 reached 2500W / m². 2 This irradiation intensity is just sufficient to generate a large number of active free radicals in the oxidant under ultraviolet photocatalysis. The irradiation intensity monitored at control point 10 (128.0 cm from the inner wall of the existing ultraviolet lamp sleeve), outside the splicing cover 2, is 406 W / m². 2 The intensity of this irradiation is insufficient to inactivate viruses, bacteria, and other microorganisms in the water under ultraviolet light irradiation.

[0111] Finally, the power of the ultraviolet lamp was increased so that the irradiance monitored at the control point 10 (128.0 cm away from the inner wall of the existing ultraviolet lamp sleeve) outside the splicing cover 2 was 500 W / m. 2 The intensity of this irradiation is just enough to inactivate viruses, bacteria, and other microorganisms in the water under ultraviolet light irradiation.

[0112] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An assembled reaction cylinder for activating the catalytic oxidation function of an ultraviolet germicidal lamp, used for water purification, characterized in that, The assembled reaction cylinder includes: an ultraviolet lamp sleeve, a splicing cover, a splicing assembly, an end sealing plate, an annular perforated plate, a first oxidant inlet, a second oxidant inlet, a third oxidant inlet, an oxidant pumping assembly, a monitoring assembly, and an electrical control assembly. The ultraviolet lamp sleeve is a quartz outer sleeve that encapsulates the ultraviolet lamp used for disinfection in existing water purification facilities; The splicing cover is located outside the UV lamp sleeve, and both ends of it are sealed with end sealing plates to enclose the UV lamp sleeve inside the cover. An annular gap cavity is formed between the inner wall of the splicing cover and the outer wall of the UV lamp sleeve. The ultraviolet lamp sleeve and the splicing cover are coaxially arranged; The oxidant pumping assembly is used to store multiple oxidants and pressurize and deliver the multiple oxidants to the first, second, and third oxidant inlets connected thereto as needed; The first, second and third oxidant inlets are all located in the annular gap cavity, for conveying various oxidants from the oxidant pumping assembly to the annular gap cavity; The shape of the splicing cover is a part of the side surface of the tube, and several splicing covers of the same specifications can be spliced ​​together to form a complete tube; the splicing cover is made of quartz material and has several through holes in appropriate positions; the inner wall and / or outer wall of the splicing cover is coated with an ultraviolet catalyst; adjacent splicing covers are connected by splicing components to tightly connect the two adjacent splicing covers and ensure no gaps; A first oxidant inlet is provided between the end sealing plate in the annular gap cavity and its nearest annular perforated plate. The splicing cover in this space does not have through holes. The first oxidant is sprayed from the first oxidant inlet toward the radial direction of the splicing cover into the annular gap cavity, and then sprayed through the through holes of the annular perforated plate toward the axial direction of the splicing cover into the annular gap cavity outside the annular perforated plate. Under the excitation of high intensity ultraviolet light in the annular gap cavity, a high concentration of active free radicals is generated, and then flows out from the through holes on the surface of the splicing cover. A second oxidant inlet is provided between two closely spaced adjacent annular perforated plates in the annular gap cavity. The splicing cover in this space does not have through holes. The second oxidant is sprayed from the second oxidant inlet toward the radial direction of the splicing cover into the annular gap cavity. Then, the second oxidant is sprayed through the through holes of the two annular perforated plates toward the axial direction of the splicing cover into the annular gap cavity outside the annular perforated plates. Under the excitation of high intensity ultraviolet light in the annular gap cavity, a high concentration of active free radicals is generated, and then flows out from the through holes on the surface of the splicing cover. A third oxidant inlet is provided between two adjacent annular perforated plates that are far apart in the annular gap cavity. The splicing cover in this space has several through holes. The third oxidant is sprayed from the third oxidant inlet into the annular gap cavity in the radial direction of the splicing cover. Under the excitation of high intensity ultraviolet light in the annular gap cavity, a high concentration of active free radicals are generated, and then flow out from the through holes on the surface of the splicing cover.

2. The assembled reaction cylinder for activating the catalytic oxidation function of an ultraviolet germicidal lamp according to claim 1, characterized in that, Two end sealing plates are respectively provided at both ends of the splicing cover; the end sealing plates are fan-shaped, have no holes on the surface, and are sealed and engaged with the inner wall of the splicing cover and the outer wall of the ultraviolet lamp sleeve.

3. The assembled reaction cylinder for activating the catalytic oxidation function of an ultraviolet germicidal lamp according to claim 1, characterized in that, Two or more annular perforated plates are provided in the annular gap cavity; the annular perforated plates are fan-shaped, with several through holes on their surface, and are sealed and engaged with the inner wall of the splicing cover and the outer wall of the ultraviolet lamp sleeve.

4. The assembled reaction cylinder for activating the catalytic oxidation function of an ultraviolet germicidal lamp according to claim 1, characterized in that, The monitoring component includes multiple monitoring probes for monitoring pollutant concentrations and ultraviolet radiation intensity in the water; the multiple monitoring probes are at least located in the water outside the annular gap cavity and the spliced ​​cover.

5. The assembled reaction cylinder for activating the catalytic oxidation function of an ultraviolet germicidal lamp according to claim 1, characterized in that, The electronic control component is electrically connected to the ultraviolet lamp sleeve and the oxidant pumping component. The electronic control component is used to adjust the irradiation intensity of the ultraviolet lamp sleeve, the dosage of various oxidants pressurized and delivered by the oxidant pumping component, and the opening degree of the flow regulating valve connected to each oxidant inlet according to the pollutant concentration and ultraviolet irradiation intensity fed back by the monitoring probe.

6. A modular assembly reaction cylinder, characterized in that, It is composed of several assembled reaction cylinders as described in any one of claims 1-5, and the irradiation intensity at the midpoint between two adjacent reaction cylinders meets the disinfection conditions of the water body.

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