A method for activating the catalytic oxidation function of ultraviolet germicidal lamps

Abstract

The invention relates to the field of environmental protection water treatment, and discloses a method for stimulating catalytic oxidation function by modifying an ultraviolet germicidal lamp, comprising the following steps: vertically fixing a plurality of annular orifice plates on the side of an existing ultraviolet lamp sleeve, and vertically fixing two end sealing plates on the two ends of the ultraviolet lamp sleeve; splicing a plurality of transparent porous splicing covers into a complete tube body and engaging the splicing covers with the outer ring edges of the annular orifice plates and the end sealing plates, so that an annular gap cavity is formed between the splicing assembly and the ultraviolet lamp sleeve; pressurizing and conveying a plurality of oxidants to a first, a second and a third oxidant inlet connected to a side of the splicing cover through an oxidant pumping assembly, and then spraying the oxidants into the annular gap cavity, and stimulating the generation of high-concentration active free radicals; the high-concentration active free radicals flow out from the through holes on the side of the splicing cover to an external water body, thereby achieving the transformation goals of improving water quality and highly efficient disinfection.

Description

Technical Field

[0001] The invention relates to the field of environmental protection water treatment, and in particular to a method for stimulating catalytic oxidation function by modifying an ultraviolet germicidal lamp. Background Art

[0002] Common methods for efficiently removing new pollutants include: adsorption, membrane and advanced oxidation. The adsorption method is flexible and simple to operate, and has good adsorption capacity for some new antibiotic pollutants. However, in actual application, the adsorbent needs to be disposed of again after use. Literature reports that membranes have a good removal effect on more than 70% of new pollutant types. However, membrane components are expensive, easy to clog, and difficult to regenerate, which hinders large-scale engineering applications. Advanced oxidation methods have the technical advantages of high reaction activity and strong degradation ability, and can mineralize a variety of new pollutants. Among them, the advanced oxidation system based on free radical generation and enhancement combined with green ecological catalysts shows good prospects for engineering applications.

[0003] Ultraviolet lamp is an environmentally friendly, secondary pollution-free, and highly efficient water purification and disinfection equipment. It comes in various forms and categories. The most common of them is the ultraviolet lamp tube commonly used in ultraviolet disinfection equipment in water purification facilities. It is widely used due to its advantages such as easy implementation, simple operation, and significant effects.

[0004] The above-mentioned ultraviolet lamp can emit ultraviolet rays with a shorter wavelength (λ<400nm). Ultraviolet rays can not only quickly denature proteins, thereby effectively killing almost all bacteria and pathogens in the water, but also produce direct photolysis of organic matter in the water when the wavelength is shorter and the dosage is larger (reaction 1-4).

[0005] R + hν(λ < 185nm)→ R * (1)

[0006] R * →·R1+·CH2CH3 (2)

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

[0008] I i +·I i →P (4)

[0009] Based on the conventional UV lamp disinfection and water purification technology, combined with photocatalytic oxidation technology, an advanced oxidation water purification technology that uses ultraviolet light in conjunction with semiconductor photocatalytic materials has been developed. This technology can effectively stimulate the generation of active free radicals such as hydroxyl radicals (·OH) in water, and then through the addition, substitution, electron transfer, bond breaking and other effects of active free radicals on organic compounds, large molecular organic matter can be degraded into small molecular substances, or even directly degraded into carbon dioxide (CO2) and water (H2O), thereby achieving water purification. The above-mentioned active free radicals also include excited oxygen atoms (O 1 D), superoxide free radicals (HO2 ·- / O2 ·- ), singlet oxygen ( 1 O2) also has strong oxidizing properties and can undergo a mineralization reaction 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 combination of multiple oxidants and ultraviolet photocatalytic technology can further improve the disinfection and purification efficiency of water bodies, achieving significant improvements over the use of a single oxidant or a single ultraviolet photocatalytic method. For example: the reaction of ozone alone with organic matter is selective, and it cannot completely decompose organic matter into CO2 and H2O; if ozone and ultraviolet photocatalytic technology are used in combination, the water purification and disinfection efficiency can be effectively improved. The working principle of the combined use of ozone and ultraviolet photocatalytic technology for water purification and deodorization is shown in reaction equations 9-11, where O3 represents ozone, UV represents ultraviolet radiation, hv represents photolysis, and O 1 D represents an excited oxygen atom, ·OH represents a hydroxyl radical, and H2O2 represents hydrogen peroxide.

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

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

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

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

[0019] 2O3+H2O2→·OH+·OH+3O2 (12)

[0020] The reaction of chlorine dioxide and hydrogen peroxide can produce hypochlorous acid, which has strong oxidizing properties:

[0021] 2ClO2+H2O2→2HClO2+O2 (13)

[0022] The combination of hydrogen peroxide and ultraviolet photocatalysis technology 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 the organic reactant, and R* represents the 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 play the role of ultraviolet disinfection, and do not fully utilize the inherent energy of ultraviolet lamps to achieve the ultraviolet photocatalytic water purification effect. In fact, the ultraviolet radiation intensity of existing disinfection ultraviolet lamps at the pipe wall is relatively high (generally up to 5000W / m 2 The above), if the high-intensity ultraviolet radiation near the wall of the ultraviolet lamp can be fully utilized, sufficient oxidants such as O3, H2O2, ClO2, etc. can be supplied in this area, supplemented by the catalytic effect of photocatalysts such as black titanium and titanium dioxide, the above chemical reaction can be stimulated to produce a large number of active free radicals, which can effectively purify and enhance the disinfection of the water body. On the other hand, the existing ultraviolet lamps for disinfection usually have a layer of quartz tube sleeve integrated on the outside of the lamp tube to play a protective role. The water body is in direct contact with the outer wall of the above outer tube sleeve, and the ultraviolet lamp will generate high temperature when working for a long time, which makes the outer wall of the above outer tube sleeve easy to scale at high temperature, and it 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 body to be treated, the problem of high-temperature scaling of the sleeve can be significantly avoided.

[0028] In order to maximize the function of the ultraviolet lamp, the present invention intends to appropriately modify the ultraviolet lamp sleeve used for disinfection in existing water purification (including but not limited to tap water, reclaimed water reuse, water resource recycling, urban water treatment, industrial wastewater treatment) plants or facilities, so as to achieve 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 ultraviolet lamp sleeve. 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 stimulating the generation of active free radicals, poor water purification effect, easy scaling and difficulty in cleaning of the outer tube sleeve, and to appropriately modify the existing ultraviolet lamps and provide a method for stimulating catalytic oxidation function by modifying ultraviolet germicidal lamps.

[0030] The present invention solves the above technical problems through the following technical solutions:

[0031] A method for stimulating catalytic oxidation function by modifying an ultraviolet germicidal lamp, the method comprising the following steps:

[0032] Step 1: fix a plurality of annular orifice plates to the side of the existing ultraviolet lamp sleeve perpendicular to the axis direction of the ultraviolet lamp sleeve, and fix two end sealing plates to both ends of the ultraviolet lamp sleeve perpendicular to the axis direction of the ultraviolet lamp sleeve;

[0033] Step 2: Engage a plurality of transparent porous spliced ​​covers on the outer ring edges of the annular orifice plate and the end sealing plate parallel to the axis direction of the ultraviolet lamp sleeve, and splice the spliced ​​covers into a complete tube body through a plurality of splicing components, so that an annular gap cavity is formed between the splicing components and the ultraviolet lamp sleeve;

[0034] Step 3: conveying a plurality of oxidants by pressure through an oxidant pumping assembly to a first oxidant inlet, a second oxidant inlet, and a third oxidant inlet connected to the side of the spliced ​​cover body, so that the plurality of oxidants are sprayed into the annular gap cavity, and then excited to generate high-concentration active free radicals under the irradiation of the ultraviolet light of the ultraviolet lamp sleeve and the catalytic action of the photocatalyst coated on the inner wall of the spliced ​​cover body;

[0035] Step 4: The high-concentration active free radicals flow out from the through holes on the side of the spliced ​​cover to the external water body, so as to efficiently oxidize the external water body. Meanwhile, the ultraviolet rays refracted or transmitted from the spliced ​​cover can efficiently disinfect the external water body.

[0036] Step 5: several monitoring probes of the monitoring assembly are arranged in the water body in the annular gap cavity and outside the spliced ​​cover body.

[0037] Step six: electrically connect the electronic control component to the UV lamp sleeve and the oxidant pumping component.

[0038] In this solution, the combined action of the ultraviolet lamp sleeve and the oxidant can effectively stimulate the generation of active free radicals such as hydroxyl free radicals in the water body, and then through the addition, substitution, electron transfer, bond breaking and other effects of the active free radicals and organic compounds in the water body, the macromolecular organic matter is degraded into small molecular substances, or even directly degraded into carbon dioxide and water, thereby achieving water purification, especially for new pollutants such as persistent organic pollutants, antibiotics, and endocrine disruptors. It has a good treatment effect. By arranging the ultraviolet lamp sleeve in the spliced ​​cover body, an annular gap cavity is formed between the two. In the annular gap cavity, the concentration of the reaction substrate (oxidant) is relatively high, which enhances and accelerates the reaction efficiency, continuously generates active free radicals, and diffuses from the through holes on the side of the spliced ​​cover body to the water body disinfection area, thereby playing a highly efficient purification and enhanced disinfection role on the water body outside the spliced ​​cover body.

[0039] Preferably, the shape of the spliced ​​cover body is a part of the side surface of the tube body, and several spliced ​​covers of the same specifications can be spliced ​​into a complete tube body; the spliced ​​cover body is made of quartz and other materials that are resistant to UV aging, high temperature, high light transmittance, and high strength, and a number of through holes are opened at appropriate positions; its inner wall surface and / or outer wall surface are coated with an ultraviolet catalyst, and the catalyst is one or more of black titanium, titanium dioxide, zinc oxide, tin oxide or zirconium dioxide; two adjacent spliced ​​covers are connected by a splicing assembly, which is used to tightly connect the two adjacent spliced ​​covers to ensure that there is no gap.

[0040] In this solution, the spliced ​​cover is set as a part of the transparent tube body, so that ultraviolet rays can be refracted or transmitted outside the transparent tube body, and multiple through holes are set on the side wall of the transparent tube body, so that the high-concentration active free radicals generated in the annular gap cavity flow out from the through holes to the water body outside the transparent tube, thereby producing a purification effect on the water body outside the transparent tube body. By coating the inner wall and / or outer wall of the transparent tube body with an ultraviolet catalyst, the ultraviolet catalytic effect under ultraviolet irradiation is promoted, and the efficiency of generating active free radicals is improved, which is conducive to improving the purification effect of the ultraviolet catalytic oxidation equipment on the water body.

[0041] Preferably, two end sealing plates are respectively provided at both ends of the spliced ​​cover body; the end sealing plates are fan-shaped, have no holes on the surface, and are tightly sealed with the inner wall of the spliced ​​cover body and the outer wall of the UV lamp sleeve.

[0042] Preferably, two or more annular orifice plates are arranged in the annular gap cavity; the annular orifice plates are fan-shaped, with a plurality of through holes formed on the surface, and are tightly sealed and engaged with the inner wall of the splicing cover and the outer wall of the ultraviolet lamp sleeve.

[0043] Preferably, a first oxidant inlet is provided between the end sealing plate in the annular gap cavity and the annular orifice plate nearest to it, and the spliced ​​cover body in this space has no through-holes; the first oxidant sprays from the first oxidant inlet toward the radial direction of the spliced ​​cover body to the annular gap cavity, and then sprays through the through-holes of the annular orifice plate toward the axial direction of the spliced ​​cover body to the annular gap cavity outside the annular orifice plate, and under the excitation of high-intensity ultraviolet light in the annular gap cavity, high-concentration active free radicals are generated, and then flow out from the through-holes on the surface of the spliced ​​cover body.

[0044] Preferably, a second oxidant inlet is provided between two adjacent annular orifice plates that are close to each other in the annular gap cavity, and the spliced ​​cover body in this space has no through holes; the second oxidant sprays from the second oxidant inlet toward the radial direction of the spliced ​​cover body to the annular gap cavity, and then the second oxidant sprays through the through holes of the above-mentioned two annular orifice plates toward the axial direction of the spliced ​​cover body to the annular gap cavity outside the annular orifice plates, and generates high-concentration active free radicals under the excitation of high-intensity ultraviolet in the annular gap cavity, and then flows out from the through holes on the surface of the spliced ​​cover body.

[0045] Preferably, a third oxidant inlet is provided between two adjacent annular orifice plates that are far apart in the annular gap cavity, and a plurality of through holes are provided in the spliced ​​cover body in the space; the third oxidant is sprayed from the third oxidant inlet toward the radial direction of the spliced ​​cover body to the annular gap cavity, and under the excitation of high-intensity ultraviolet light in the annular gap cavity, high-concentration active free radicals are generated, and then flow out from the through holes on the surface of the spliced ​​cover body.

[0046] In the above scheme, multiple oxidants are output to the annular gap space through the first, second and third oxidant inlets, especially the oxidants are sprayed through the annular orifice plate toward the axial direction of the spliced ​​cover body to the annular gap cavity outside the annular orifice plate, thereby improving the input stability and distribution uniformity of the oxidant, so that the active free radicals at various positions in the flow direction of the spliced ​​cover body can maintain a high concentration, which is conducive to the continuous stimulation and generation of high-concentration active free radicals, and flowing out from the through holes on the side of the spliced ​​cover body, thereby achieving efficient purification and enhanced disinfection effect on the water body outside the spliced ​​cover body.

[0047] Preferably, the monitoring assembly includes a plurality of monitoring probes for monitoring the pollutant concentration in the water body and / or monitoring the intensity of ultraviolet radiation; the plurality of monitoring probes are arranged at least in the water body in the annular gap cavity and outside the spliced ​​cover body.

[0048] In this scheme, by setting up monitoring probes, the pollutant concentration and / or ultraviolet radiation intensity of the water body can be monitored in real time. When the pollutant concentration in the water body is too high or the ultraviolet radiation intensity is insufficient, timely feedback can be given, and the output of the oxidant and the radiation intensity of the ultraviolet lamp sleeve can be adjusted in time, which is conducive to the optimal allocation of resources.

[0049] Preferably, the electronic control component is electrically connected to the ultraviolet lamp sleeve, and is used to adjust the irradiation intensity of the ultraviolet lamp sleeve, the dosage of multiple oxidants pressurized by the oxidant pumping component, and the opening 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.

[0050] In this scheme, when the pollutant concentration in the water body is too high or the ultraviolet radiation intensity is insufficient, the monitoring component provides feedback to the electronic control component, and the electronic control component makes timely adjustments to the output of the oxidant and the radiation intensity of the ultraviolet lamp sleeve. The adjustment of the oxidant input dose and / or the radiation intensity of the ultraviolet lamp sleeve is more convenient and the adjustment accuracy is higher, which is beneficial to the purification effect of the ultraviolet catalytic device.

[0051] Preferably, multiple existing ultraviolet lamp sleeves in the water body can be modified according to the above method at the same time, so that they form a complete combination after the modification, and the irradiation intensity at the midpoint of the distance between two adjacent ultraviolet lamp sleeves can meet the basic disinfection conditions of the water body.

[0052] The positive and progressive effects of the present invention are:

[0053] (1) Based on the existing ultraviolet lamp water purification equipment, through appropriate modification, it is possible to achieve high-efficiency continuous excitation and diffusion of active free radicals, and give full play to the water purification function of active free radicals, maximize the value of ultraviolet lamp equipment, and significantly improve the water purification efficiency of ultraviolet lamp equipment.

[0054] (2) By injecting water and oxides into the annular gap cavity between the existing UV lamp sleeve and the newly added spliced ​​cover body, active free radicals are efficiently and continuously generated in this annular gap cavity. After the high-concentration active free radicals flow out from the small holes opened in the side wall of the spliced ​​cover body, they will have a highly efficient purification and enhanced disinfection effect on the water outside the spliced ​​cover body, which can completely offset the slight loss caused by ultraviolet rays transmitting or refracting the spliced ​​cover body (active free radicals and various oxidants have a further killing effect on microorganisms in the water body), and can significantly improve the overall water purification and disinfection efficiency.

[0055] (3) By injecting at least one oxidant into the annular gap cavity between the existing ultraviolet lamp sleeve and the spliced ​​cover body, the ultraviolet lamp sleeve and the water body are isolated, avoiding direct contact between the ultraviolet lamp sleeve and the treated water body, making it difficult for the spliced ​​cover body to heat up, fundamentally avoiding high-temperature scaling of pollutants in the water body on the ultraviolet lamp sleeve, and the injected oxidant and the excited high-concentration active free radicals have a good cleaning effect on the ultraviolet lamp sleeve and the side wall of the spliced ​​cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A flow chart of the steps of the method proposed by the present invention for stimulating the catalytic oxidation function by modifying the ultraviolet germicidal lamp;

[0057] Figure 2 A three-dimensional diagram of the assembled reaction tube in a "split state" after being transformed by the method proposed by the present invention;

[0058] Figure 3 A three-dimensional view of the assembled reaction tube in a "disassembled state" after being transformed by the method proposed by the present invention;

[0059] Figure 4 A cross-sectional view of the center axis of the assembled reaction tube after being transformed by the method proposed by the present invention;

[0060] Figure 5 The irradiation intensity of the assembled reaction tube proposed by the present invention at the outer wall of the ultraviolet lamp sleeve is 25000W / m 2 Distribution diagram of ultraviolet radiation intensity at different intervals outside the ultraviolet lamp under certain conditions;

[0061] Figure 6 A side view of a complete set of equipment proposed by the present invention, in which four groups of assembled reaction tubes are used in coordination;

[0062] Figure 7 This is a schematic diagram of the water purification principle of a complete set of equipment proposed by the present invention, which is coordinated and used by four groups of assembled reaction cylinders;

[0063] Description of reference numerals:

[0064] UV lamp sleeve 1;

[0065] Splicing cover 2;

[0066] Splicing component 3;

[0067] End sealing plate 41;

[0068] annular orifice plate 42;

[0069] A first oxidant inlet 51;

[0070] A second oxidant inlet 52;

[0071] A third oxidant inlet 53;

[0072] Flow regulating valve 54;

[0073] Oxidant pumping assembly 6 (not shown);

[0074] Monitoring component 7 (not shown);

[0075] Electronic control component 8 (not shown);

[0076] Oxidant flow direction 9;

[0077] Control point 10. DETAILED DESCRIPTION

[0078] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0079] This embodiment provides a method for stimulating the catalytic oxidation function by modifying the ultraviolet germicidal lamp, such as Figure 1 As shown, the method comprises the following steps:

[0080] Step 1: fix a plurality of annular orifice plates 42 to the side of the existing ultraviolet lamp sleeve 1 perpendicular to the axis direction of the ultraviolet lamp sleeve 1, and fix two end sealing plates 41 to both ends of the ultraviolet lamp sleeve 1 perpendicular to the axis direction of the ultraviolet lamp sleeve 1;

[0081] Step 2: Engage a plurality of transparent porous spliced ​​covers 2 on the outer edges of the annular orifice plate 42 and the end sealing plate 41 parallel to the axis direction of the ultraviolet lamp sleeve 1, and splice the spliced ​​covers 2 into a complete tube body through a plurality of splicing components 3, so that an annular gap cavity is formed between the splicing components 3 and the ultraviolet lamp sleeve 1;

[0082] Step 3: The multiple oxidants are pressurized and delivered to the first oxidant inlet 51, the second oxidant inlet 52, and the third oxidant inlet 53 connected to the side of the spliced ​​cover body 2 through the oxidant pumping assembly 6, so that the multiple oxidants are sprayed into the annular gap cavity, and then excited to generate high-concentration active free radicals under the ultraviolet light irradiation of the ultraviolet lamp sleeve 1 and the catalytic action of the photocatalyst coated on the inner wall of the spliced ​​cover body 2;

[0083] Step 4: The high-concentration active free radicals flow out from the through holes on the side of the spliced ​​cover body 2 to the external water body, so as to efficiently oxidize the external water body. Meanwhile, the ultraviolet rays refracted or transmitted from the spliced ​​cover body 2 can efficiently disinfect the external water body.

[0084] Step 5: several monitoring probes of the monitoring assembly 7 are arranged in the water body in the annular gap cavity and outside the spliced ​​cover body 2 .

[0085] Step six: electrically connect the electronic control component 8 to the UV lamp sleeve 1 and the oxidant pumping component 6 .

[0086] In this embodiment, by appropriately modifying the existing ultraviolet lamp sleeve 1 for disinfection of water purification facilities, 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 ultraviolet lamp sleeve 1.

[0087] In addition, the oxidant pumping assembly 6 is used to store multiple oxidants and pressurize and transport the multiple oxidants to the first, second, and third oxidant inlets 53 connected thereto as needed; the first, second, and third oxidant inlets 53 are all arranged in the annular gap cavity, and are used to transport the multiple oxidants from the oxidant pumping assembly 6 to the annular gap cavity.

[0088] In this embodiment, the combined action of the ultraviolet lamp sleeve 1 and the oxidant can effectively stimulate the generation of active free radicals such as hydroxyl free radicals in the water body, and then through the addition, substitution, electron transfer, bond breaking and other effects of the active free radicals and organic compounds in the water body, the macromolecular organic matter is degraded into small molecular substances, or even directly degraded into carbon dioxide and water, thereby achieving water purification, especially for persistent organic pollutants, antibiotics, endocrine disruptors and other new pollutants. By arranging the ultraviolet lamp sleeve 1 in the spliced ​​cover body 2, an annular gap cavity is formed between the two. In the annular gap cavity, the concentration of the reaction substrate (oxidant) is relatively high, which enhances and accelerates the reaction efficiency, continuously generates active free radicals, and diffuses from the through holes on the side of the spliced ​​cover body 2 to the water body disinfection area, thereby playing a highly efficient purification and enhanced disinfection role on the water body outside the spliced ​​cover body.

[0089] The shape of the spliced ​​cover body 2 is half of the side surface of the circular tube, and two spliced ​​cover bodies 2 of the same specifications can be spliced ​​into a complete circular tube; the spliced ​​cover body 2 is made of quartz material, and a plurality of through holes are opened at appropriate positions, with a hole diameter of 0.5 cm, and a spacing between two adjacent through holes is 2 cm; the inner wall and the outer wall are coated with ultraviolet catalysts, and the catalyst is one or more of black titanium, titanium dioxide, zinc oxide, tin oxide or zirconium dioxide.

[0090] Two adjacent spliced ​​cover bodies 2 are connected by a splicing assembly 3, which is used to tightly connect the two adjacent spliced ​​cover bodies 2 to ensure that there is no gap.

[0091] The through holes are evenly distributed in a mesh on the axially extending side wall of the transparent tube body 102, with a hole diameter of 0.5 cm and a spacing of 2 cm between two adjacent through holes; the catalyst is made of black titanium.

[0092] In this embodiment, the spliced ​​cover 2 is set as half of the transparent tube body, so that the ultraviolet rays can be refracted to or transmitted outside the transparent tube body, and a plurality of through holes are set on the side wall of the transparent tube body, so that the high-concentration active free radicals generated in the annular gap cavity flow out from the through holes to the water body outside the transparent tube, thereby producing a purification effect on the water body outside the transparent tube body. By coating the inner wall and / or outer wall of the transparent tube body with an ultraviolet catalyst, the ultraviolet catalytic effect under ultraviolet irradiation is promoted, and the efficiency of generating active free radicals is improved, which is conducive to improving the purification effect of the ultraviolet catalytic oxidation equipment on the water body.

[0093] Two end sealing plates 41 are respectively provided at both ends of the spliced ​​cover body 2 ; the end sealing plates 41 are fan-shaped, have no holes on the surface, and are tightly sealed and engaged with the inner wall of the spliced ​​cover body 2 and the outer wall of the ultraviolet lamp sleeve 1 .

[0094] Two or more annular orifice plates 42 are arranged in the annular gap cavity; the annular orifice plates 42 are fan-shaped, with a plurality of through holes formed on the surface, and are sealed and engaged with the inner wall of the spliced ​​cover body 2 and the outer wall of the ultraviolet lamp sleeve 1 .

[0095] A first oxidant inlet 51 is provided between the end sealing plate 41 in the annular gap cavity and the annular orifice plate 42 closest thereto, and no through-hole is provided in the spliced ​​cover body 2 in this space; the first oxidant sprays from the first oxidant inlet 51 toward the radial direction of the spliced ​​cover body 2 to the annular gap cavity, and then sprays through the through-holes of the annular orifice plate 42 toward the axial direction of the spliced ​​cover body 2 to the annular gap cavity outside the annular orifice plate 42, and under the excitation of high-intensity ultraviolet in the annular gap cavity, high-concentration active free radicals are generated, and then flow out from the through-holes on the surface of the spliced ​​cover body 2.

[0096] A second oxidant inlet 52 is provided between two adjacent annular orifice plates 42 that are close to each other in the annular gap cavity, and the spliced ​​cover body 2 in this space has no through-holes; the second oxidant sprays from the second oxidant inlet 52 toward the radial direction of the spliced ​​cover body 2 to the annular gap cavity, and then the second oxidant sprays toward the axial direction of the spliced ​​cover body 2 through the through-holes of the above-mentioned two annular orifice plates 42 to the annular gap cavity outside the annular orifice plates 42, and under the excitation of high-intensity ultraviolet in the annular gap cavity, high-concentration active free radicals are generated, and then flow out from the through-holes on the surface of the spliced ​​cover body 2.

[0097] Preferably, a third oxidant inlet 53 is provided between two adjacent annular orifice plates 42 that are far apart in the annular gap cavity, and a plurality of through holes are provided in the spliced ​​cover body 2 in the space; the third oxidant is sprayed from the third oxidant inlet 53 toward the radial direction of the spliced ​​cover body 2 to the annular gap cavity, and under the excitation of high-intensity ultraviolet 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 spliced ​​cover body 2.

[0098] In this embodiment, a variety of oxidants are output to the annular gap space through the first, second and third oxidant inlets 53, and in particular, the oxidants are sprayed through the annular orifice plate 42 toward the axial direction of the spliced ​​cover body 2 to the annular gap cavity outside the annular orifice plate 42, thereby improving the input stability and distribution uniformity of the oxidant, so that the active free radicals at various positions in the flow direction in the spliced ​​cover body 2 can 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 spliced ​​cover body 2, thereby achieving efficient purification and enhanced disinfection of the water outside the spliced ​​cover body 2.

[0099] The monitoring assembly 7 includes a plurality of monitoring probes for monitoring the pollutant concentration of the water body and / or monitoring the ultraviolet radiation intensity; the plurality of monitoring probes are at least arranged in the water body in the annular gap cavity and outside the spliced ​​cover body 2 .

[0100] In this embodiment, by setting up a monitoring probe, the pollutant concentration and / or ultraviolet radiation intensity of the water body can be monitored in real time. When the pollutant concentration in the water body is too high or the ultraviolet radiation intensity is insufficient, timely feedback can be given, and the output of the oxidant and the radiation intensity of the ultraviolet lamp sleeve 1 can be adjusted in time, which is beneficial to the optimal allocation of resources.

[0101] The electric control component 8 is electrically connected to the ultraviolet lamp sleeve 1 , and 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.

[0102] In this embodiment, when the pollutant concentration in the water body is too high or the ultraviolet radiation intensity is insufficient, the monitoring component 7 provides feedback to the electronic control component 8, and the electronic control component 8 makes timely adjustments to the output of the oxidant and the radiation intensity of the ultraviolet lamp sleeve 1. The adjustment of the radiation intensity of the ultraviolet lamp sleeve 1 and the opening of the flow regulating valve 54 connected to each oxidant inlet are more convenient and the adjustment accuracy is higher, which is beneficial to the purification effect of the ultraviolet catalytic device.

[0103] A complete set of combinations can be formed by a plurality of assembled reaction tubes, and the irradiation intensity at the midpoint of the distance between two adjacent devices can meet the basic disinfection conditions of the water body.

[0104] In this embodiment, through the complete combination arrangement of the above-mentioned multiple assembled reaction cylinders, pollutants in different positions of the water body can be purified, and the pollutant concentration and ultraviolet radiation intensity of each area of ​​the water body can be monitored in real time. The oxidant input dose and / or the radiation intensity of the ultraviolet lamp sleeve 1 can be flexibly adjusted according to the difference in pollution degree in each area to achieve the overall purification effect of the water quality.

[0105] In this embodiment, the factory rated irradiation intensity at the outer wall of the existing UV lamp sleeve 1 is 25000W / m 2The attenuation formula of the irradiance of the linear ultraviolet lamp in water is as follows: its linear attenuation coefficient in water is 1m -1 .

[0106]

[0107] in:

[0108] According to the above formula, the relationship curve between the ultraviolet radiation intensity monitored by the monitoring probe and the inner wall spacing of the existing ultraviolet lamp sleeve 1 is fitted by Python language programming as shown in the figure: Figure 4 As shown (python coding as Figure 6 shown).

[0109] like Figure 4 As shown, the irradiation intensity monitored at the outer wall of the existing UV lamp sleeve 1 (wall thickness 0.1 cm) is 25000 W / m 2 The irradiation intensity is relatively high, which can directly photolyze the water and produce 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 2617W / m 2 The irradiation intensity can make the oxidant produce a large number of active free radicals under the catalytic action of ultraviolet light; the irradiation intensity monitored at the control point 10 outside the spliced ​​cover 2 (128.0 cm away from the inner wall of the existing ultraviolet lamp sleeve) is 569W / m 2 This irradiation intensity can inactivate viruses, bacteria and other microorganisms in the water under the action of ultraviolet light.

[0110] First, the irradiation intensity monitored at the outer wall of the existing UV lamp sleeve 1 (wall thickness 0.1 cm) dropped to 20300W / m 2 The irradiation intensity is still relatively high, which can directly photolyze the water and produce 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 1917W / m 2 The irradiation intensity is not enough to cause the oxidant to produce a large number of active free radicals under the catalytic action of ultraviolet light.

[0111] Secondly, the injection amount of the oxidant was increased to clean the outer wall of the UV lamp sleeve 1 and the side wall of the spliced ​​cover body 2. After cleaning, the irradiation intensity at the inner wall of the spliced ​​cover body 2 was monitored to be 2059W / m 2 , it is still not enough for the oxidant to produce a large number of active free radicals under the catalytic action of ultraviolet light.

[0112] Next, the power of the UV lamp is increased so that the monitored irradiation intensity at the inner wall of the spliced ​​cover 2 reaches 2500W / m 2The irradiation intensity is just enough to make the oxidant produce a large number of active free radicals under the catalytic action of ultraviolet light. The irradiation intensity monitored at the control point 10 outside the spliced ​​cover 2 (128.0 cm away from the inner wall of the existing ultraviolet lamp sleeve) is 406W / m 2 The irradiation intensity is not enough to inactivate viruses, bacteria and other microorganisms in the water under the action of ultraviolet light.

[0113] Finally, the power of the UV lamp is increased so that the irradiation intensity monitored at the control point 10 outside the spliced ​​cover 2 (128.0 cm away from the inner wall of the existing UV lamp sleeve) is 500 W / m 2 The irradiation intensity is just enough to inactivate viruses, bacteria and other microorganisms in the water under the action of ultraviolet light.

[0114] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all belong to the protection scope of the present invention.

Claims

1. A method for stimulating catalytic oxidation function by modifying an ultraviolet germicidal lamp, characterized in that: The method comprises the following steps: Fixing a plurality of annular orifice plates to the side of the ultraviolet lamp sleeve perpendicular to the axis direction of the existing ultraviolet lamp sleeve, and fixing two end sealing plates to both ends of the ultraviolet lamp sleeve perpendicular to the axis direction of the ultraviolet lamp sleeve; A plurality of transparent porous spliced ​​covers are clamped to the outer ring edges of the annular orifice plate and the end sealing plate in parallel with the axis direction of the ultraviolet lamp sleeve, and the spliced ​​covers are spliced ​​into a complete tube body through a plurality of splicing components, so that an annular gap cavity is formed between the splicing components and the ultraviolet lamp sleeve; The multiple oxidants are pressurized and delivered to the first oxidant inlet, the second oxidant inlet, and the third oxidant inlet connected to the side of the spliced ​​cover body through the oxidant pumping assembly, so that the multiple oxidants are sprayed into the annular gap cavity, and then excited to generate high-concentration active free radicals under the irradiation of the ultraviolet light of the ultraviolet lamp sleeve and the catalytic action of the photocatalyst coated on the inner wall of the spliced ​​cover body; The high-concentration active free radicals flow out from the through holes on the side of the spliced ​​cover to the external water body, so as to effectively oxidize the external water body. Meanwhile, the ultraviolet rays refracted or transmitted from the spliced ​​cover can effectively disinfect the external water body. Placing a plurality of monitoring probes of the monitoring assembly in the annular gap cavity and in the water outside the spliced ​​cover body; Electrically connecting the electronic control assembly to the UV lamp sleeve and the oxidant pumping assembly; A first oxidant inlet is provided between the end sealing plate in the annular gap cavity and the annular orifice plate closest thereto, and the spliced ​​cover body in this space has no through-holes; the first oxidant sprays from the first oxidant inlet toward the radial direction of the spliced ​​cover body to the annular gap cavity, and then sprays through the through-holes of the annular orifice plate toward the axial direction of the spliced ​​cover body to the annular gap cavity outside the annular orifice plate, and generates high-concentration active free radicals in the annular gap cavity under the excitation of high-intensity ultraviolet light, and then flows out from the through-holes on the surface of the spliced ​​cover body; A second oxidant inlet is provided between two adjacent annular orifice plates that are close to each other in the annular gap cavity, and the spliced ​​cover body in this space has no through-holes; the second oxidant sprays from the second oxidant inlet toward the radial direction of the spliced ​​cover body to the annular gap cavity, and then the second oxidant sprays toward the axial direction of the spliced ​​cover body through the through-holes of the above two annular orifice plates to the annular gap cavity outside the annular orifice plates, and generates high-concentration active free radicals under the excitation of high-intensity ultraviolet in the annular gap cavity, and then flows out from the through-holes on the surface of the spliced ​​cover body; A third oxidant inlet is provided between two adjacent annular orifice plates that are far apart in the annular gap cavity, and a plurality of through holes are provided in the spliced ​​cover body in the space; the third oxidant is sprayed from the third oxidant inlet toward the radial direction of the spliced ​​cover body to the annular gap cavity, and under the excitation of high-intensity ultraviolet in the annular gap cavity, high-concentration active free radicals are generated, and then flow out from the through holes on the surface of the spliced ​​cover body.

2. The method for stimulating catalytic oxidation function by modifying an ultraviolet germicidal lamp as claimed in claim 1, characterized in that: The ultraviolet lamp sleeve is a quartz outer tube sleeve integrally packaged outside the ultraviolet lamp used for disinfection in existing water purification facilities.

3. The method for stimulating catalytic oxidation function by modifying an ultraviolet germicidal lamp as claimed in claim 1, characterized in that: The shape of the spliced ​​cover body is a part of the side surface of the tube body, and several spliced ​​cover bodies of the same specifications can be spliced ​​into a complete tube body; the spliced ​​cover body is made of quartz material and has several through holes at appropriate positions; two adjacent spliced ​​cover bodies are connected by a splicing component to tightly connect the two adjacent spliced ​​cover bodies to ensure that there is no gap.

4. The method for stimulating catalytic oxidation function by modifying an ultraviolet germicidal lamp as claimed in claim 1, characterized in that: The end sealing plate is fan-shaped, has no holes on the surface, and can be sealed and engaged with the inner wall of the splicing cover body and the outer wall of the ultraviolet lamp sleeve; the annular orifice plate is fan-shaped, has a plurality of through holes on the surface, and can be sealed and engaged with the inner wall of the splicing cover body and the outer wall of the ultraviolet lamp sleeve.

5. The method for stimulating catalytic oxidation function by modifying an ultraviolet germicidal lamp as claimed in claim 1, characterized in that: The monitoring assembly includes a plurality of monitoring probes for monitoring the pollutant concentration and ultraviolet radiation intensity of the water body; at least one of the monitoring probes is arranged in the annular gap cavity, and at least one is arranged in the water body outside the spliced ​​cover body.

6. The method for stimulating catalytic oxidation function by modifying an ultraviolet germicidal lamp as claimed in claim 1, characterized in that: The electronic control component is used to adjust the irradiation intensity of the ultraviolet lamp sleeve, the dosage of multiple oxidants pressurized by the oxidant pumping component, and the opening 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.

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