CN101723484A - Ultraviolet/titanium dioxide (UV/TiO2) reactor for disinfecting drinking water treated by activated carbon - Google Patents
Ultraviolet/titanium dioxide (UV/TiO2) reactor for disinfecting drinking water treated by activated carbon Download PDFInfo
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- CN101723484A CN101723484A CN201010017224A CN201010017224A CN101723484A CN 101723484 A CN101723484 A CN 101723484A CN 201010017224 A CN201010017224 A CN 201010017224A CN 201010017224 A CN201010017224 A CN 201010017224A CN 101723484 A CN101723484 A CN 101723484A
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Abstract
The invention provides an ultraviolet/titanium dioxide (UV/TiO2) reactor for disinfecting drinking water treated by the activated carbon, aiming at solving the problem on the biosafety of bacteria, particularly the carbon-adsorbed bacteria in drinking water treated by activated carbon. The UV/TiO2 reactor is an integrated UV/TiO2 reactor system which has the advantage of disinfecting by UV and the characteristic of catalyzing by TiO2 and is optimized and integrated with the process. The UV/TiO2 reactor can effectively inactivate the free bacteria and the carbon-adsorbed bacteria in the drinking water treated by the activated carbon, can ensure the disinfected drinking water to reach the sanitary standard for drinking water (GB5749-2006) and can bear the water supplying load change on some degree, thereby having wide application prospect.
Description
Technical field
The present invention relates to a kind of ultraviolet titanium-dioxide photo disinfecting reactor of after the water outlet of drinking water activated carbon treatment process, setting up.
Technical background
Gac advanced treatment technology at the tap water micro polluted source obtains more application in developed countries such as Europe, the U.S. and Japan, uses in existing several the water factories of China.But exist bacterium and particulate matter in the water outlet can influence the problem of water quality biological safety during this technology is used, paid much attention in the world.Studies show that; gac becomes microbe carrier in the purification of water quality process; nutrition and dissolved oxygen concentration are higher near the gac carbon granule; gac carbon granule porous surface provides the protection of avoiding the hydraulic shear effect for microorganic adhesion; the existence of various surface functional groups and accumulated large number of biological particle and abiotic particle in the charcoal layer because the reductibility activated carbon to the removal effect of oxidative compound, makes.Bacterium in the activated carbon filter is many flows out with the gac fine particle, and the part bacterium is that carbon granule is adsorbed, forms charcoal attached bacteria (hereinafter to be referred as " charcoal bacterium ").Owing to be subjected to the protection of activated carbon granule, the charcoal bacterium has big resistance to traditional chlorine disinfectant.In addition, carbon granule carries after the bacterium that is not inactivated enters pipe network, can cause the secondary biological pollution attached to forming microbial film on the tube wall then, and restraining effect is played in the deactivation of residue sterilizing agent in the pipe network, and the tap water Biosafety is impacted.At present at the Biosafety problem of charcoal bacterium, often the dosage by raising sterilizing agent (chlorine) solves, but brings problem such as disinfection byproduct (DBP) (DBPs) increase, and the chemical safety of tap water is brought negative impact.Studies show that activated carbon process is limited to the removal effect of THMFP (haloform generation gesture), even find the phenomenon that THMFP raises in the water outlet of charcoal bed.
The novel drinking water disinfection technology that with the advanced oxidation is core receives much concern, wherein UV/TiO
2(ultraviolet ray/titanium dioxide) photocatalysis disinfection technology is one of focus of tap water area research.UV/TiO
2Characteristics such as that photochemical catalytic oxidation sterilization has is nontoxic, broad spectrum sterilization are a kind of promising alternative chlorine disinfectant technology.UV/TiO
2Photocatalysis disinfection mechanism is the strong oxidizing property hydroxyl radical free radical (HO) of its generation, at first destroys bacteria cell wall, then causes the oxidation of cytolemma and born of the same parents' intracellular metabolite material and genetic material to destroy, and finally causes necrocytosis and reaches the sterilization purpose.
Domestic and international UV/TiO
2The photocatalysis disinfection technical study is at the early-stage, and has appeared in the newspapers and only limit to deactivation to bacterium monomer in the water (free bacterium); The tap water field to the gac water outlet in bacterium especially the photocatalysis disinfection research of charcoal bacterium there is no report both at home and abroad, at the UV/TiO of charcoal bacterium in the gac water outlet
2The photocatalysis disinfection reactor design does not have application report.
Summary of the invention
The purpose of this invention is to provide a kind of ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon.
The present invention is for realizing that described goal of the invention adopts following technical scheme:
A kind of ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon is by outer tube, inner sleeve, TiO
2Annular plate, ultraviolet lamp, water inlet pipe and rising pipe are formed, it is characterized in that being provided with inner sleeve in the described outer tube, with the glass cement sealing and fixing, the gap between outer tube and the inner sleeve is vertically arranged and is provided with some TiO with poly (methyl methacrylate) plate for outer tube two ends and inner sleeve outer wall
2Annular plate, adjacent two TiO
2Spacing is (2.0～2.5) * TiO between the annular plate
2The internal diameter of annular plate, ultraviolet lamp are located in the inner sleeve, the axle center of described outer tube, the axle center of inner sleeve and TiO
2Annular plate be centered close to same axis; The two ends of outer tube are respectively equipped with water inlet pipe and rising pipe.
One port of described inner sleeve is provided with cooling fan.
Described outer tube is 3: 1～4: 1 with the diameter ratio of inner sleeve.
Described outer tube material is a synthetic glass, and the inner sleeve material is quartzy.
Be respectively equipped with valve on described water inlet pipe and the rising pipe.
Described TiO
2The contact site seals with glass cement between annular plate, inner sleeve and the outer sleeve.
Described TiO
2Annular plate is provided with 6 holes, and percentage of open area is 1～1.5%, the center of circle and the TiO in two adjacent holes
2The angle that the line in the annular plate center of circle forms becomes 60 degree, wherein adjacent center, 3 holes and TiO
2The annular plate distance of center circle is from being 4/3 * TiO
2Annular plate internal diameter, 3 hole distance of center circle TiO in addition
2The annular plate center of circle 7/3 * TiO
2The annular plate internal diameter; Adjacent two TiO
2Install the annular plate position, hole of staggering, per two plates dislocation 40 degree clockwise from an end to the other end.
The invention has the advantages that:
(1) this device has been realized UV/TiO
2Reactor combines with the effective of drinking water activated carbon treatment process, and cylindrical, the contact disinfection way of reactor can be easily installed in the outlet conduit; And the serial or parallel connection reactor has embodied than strong adaptability and practicality with the variation of the reply different treatment water yield flexibly, simultaneously the sterilisation effect ideal.
(2) UV/TiO
2In the reactor the suitable percentage of open area of catalytic material support plate and position, hole be misplaced layout, increased biology and TiO such as free bacterium and charcoal bacterium in the water outlet
2The collision probability of catalytic material support plate has prolonged organism to be sterilized and TiO
2The duration of contact of the hydroxyl radical free radical (HO) that the surface forms, thus strengthened the sterilising effect of HO.
(3) UV/TiO
2The free total plate count of the water outlet of reactor far below existing " drinking water sanitary standard " (GB5749-2006), and the charcoal bacterium can be realized effective deactivation; In order to keep the sterilizing agent surplus of water supply network tip, though still need to add in water tank or clean water basin sterilizing agents such as liquid chlorine, its usage quantity is greatly less, has avoided the generation of a large amount of disinfection byproduct (DBP), improve the security of supplying water, had considerable economic simultaneously.
Table 1 has compared the contact sterilizing difference of the circular sleeve+ring baffle structure of conventional slab construction and design under the identical water yield condition, the result has shown circular sleeve+ring baffle composition optimizes charcoal bacterium particle and TiO
2The plate contact conditions has prolonged the water conservancy residence time on the whole, makes UV+TiO
2The efficient of contact sterilizing is improved.
The conventional slab construction of table 1 compares with the design telescopic
Description of drawings
Accompanying drawing 1 is a ultraviolet titanium dioxide disinfecting reactor synoptic diagram of the present invention.
Accompanying drawing 2 is TiO of the present invention
2The annular plate synoptic diagram.
1 is outer tube, the 2nd among the figure, inner sleeve, the 3rd, TiO
2Annular plate, the 4th, ultraviolet lamp, the 5th, rising pipe, the 6th, cooling fan, the 7th, water inlet pipe, the 8th, valve.
Concrete implementation and operation:
Mode below by embodiment is elaborated to technical solution of the present invention, but protection scope of the present invention is not limited to described embodiment.
Embodiment 1
A kind of ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon is by outer tube 1, inner sleeve 2, TiO
2 Annular plate 3, ultraviolet lamp 4, rising pipe 5 and water inlet pipe 7 are formed, be provided with inner sleeve 2 in the described outer tube 1, with the glass cement sealing and fixing, the gap between outer tube 1 and the inner sleeve 2 is vertically arranged and is provided with 6 TiO with poly (methyl methacrylate) plate for outer tube 1 two ends and inner sleeve 2 outer walls
2 Annular plate 3, adjacent two TiO2 annular plate 3 spacings are 2 * TiO
2The internal diameter of annular plate 3, TiO
2The contact site seals with glass cement between annular plate 3, inner sleeve 2 and the outer sleeve 1.Ultraviolet lamp 4 is located in the inner sleeve 2, makes full use of the ultraviolet irradiation scope, prevents that ultraviolet ray from leaking, and is convenient to ultraviolet lamp and TiO simultaneously
2Installing and fixing of annular plate, the axle center and the TiO of the axle center of described outer tube 1, inner sleeve 2
2 Annular plate 3 be centered close to same axis; The two ends of outer tube 1 are respectively equipped with water inlet pipe 7 and rising pipe 5.Wherein the water outlet of activated carbon treatment technology enters from water inlet pipe 7, and the water of flowing through is under ultraviolet lamp 4 irradiation and TiO
2 Annular plate 3 catalytic association effects are sterilization down, and the water outlet after the sterilization is discharged through rising pipe 5.The cylindrical-concentric sleeve body makes streamflow regime steady, avoids producing the slough, and hydraulics is superior.With glass cement with TiO
2Contact site sealing between annular plate 3, inner sleeve 2 and the outer sleeve 1.
One port of described inner sleeve 2 is provided with cooling fan 6, and cooling fan 6 turns round all the time to reduce the heat that ultra violet lamp produces.
Described outer tube 1 is 3: 1 with the diameter ratio of inner sleeve 2.
Described outer tube 1 material is a synthetic glass, and inner sleeve 2 materials are quartzy.
Be respectively equipped with valve 8 on described water inlet pipe 7 and the rising pipe 5.
Described TiO
2 Annular plate 3 is provided with 6 holes, and percentage of open area is 1%, the center of circle and the TiO in two adjacent holes
2The angle that the line in annular plate 3 centers of circle forms becomes 60 degree, wherein adjacent center, 3 holes and TiO
2 Annular plate 3 distance of center circle are from being 4/3 * TiO
2 Annular plate 3 internal diameters, 3 hole distance of center circle TiO in addition
2 Annular plate 3 distance of center circle are from being 7/3 * TiO
2 Annular plate 3 internal diameters; Adjacent two TiO
2Install annular plate 3 position, hole of staggering, per two plates dislocation 40 degree clockwise from an end to the other end.The hole dislocation is put and is made the dynamic characteristic of current change, and has increased biological particless such as the charcoal bacterium collision TiO of aqueous phase
2The frequency of plate prolongs the charcoal bacterium particulate residence time, has overcome short shortcoming of HO life-span, has improved sterilisation effect.
Reactor action effect: 170 seconds residence time, disinfection efficiency 99.0%, 102/mL of survival bacterial number, UV/TiO
2Disinfectant recovery motility rate 9.1%.
A kind of ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon is by outer tube 1, inner sleeve 2, TiO
2 Annular plate 3, ultraviolet lamp 4, rising pipe 5 and water inlet pipe 7 are formed, be provided with inner sleeve 2 in the described outer tube 1, with the glass cement sealing and fixing, the gap between outer tube 1 and the inner sleeve 2 is vertically arranged and is provided with 9 TiO with poly (methyl methacrylate) plate for outer tube 1 two ends and inner sleeve 2 outer walls
2 Annular plate 3, adjacent two TiO
2 Annular plate 3 spacings are 2.2 * TiO
2The internal diameter of annular plate 3, TiO
2The contact site seals with glass cement between annular plate 3, inner sleeve 2 and the outer sleeve 1.Ultraviolet lamp 4 is located in the inner sleeve 2, makes full use of the ultraviolet irradiation scope, prevents that ultraviolet ray from leaking, and is convenient to ultraviolet lamp and TiO simultaneously
2Installing and fixing of annular plate, the axle center and the TiO of the axle center of described outer tube 1, inner sleeve 2
2 Annular plate 3 be centered close to same axis; The two ends of outer tube 1 are respectively equipped with water inlet pipe 7 and rising pipe 5.Wherein the water outlet of activated carbon treatment technology enters from water inlet pipe 7, and the water of flowing through is under ultraviolet lamp 4 irradiation and TiO
2 Annular plate 3 catalytic association effects are sterilization down, and the water outlet after the sterilization is discharged through rising pipe 5.The cylindrical-concentric sleeve body makes streamflow regime steady, avoids producing the slough, and hydraulics is superior.With glass cement with TiO
2Contact site sealing between annular plate 3, inner sleeve 2 and the outer sleeve 1.
One port of described inner sleeve 2 is provided with cooling fan 6, and cooling fan 6 turns round all the time to reduce the heat that ultra violet lamp produces.
Described outer tube 1 is 4: 1 with the diameter ratio of inner sleeve 2.
Described outer tube 1 material is a synthetic glass, and inner sleeve 2 materials are quartzy.
Be respectively equipped with valve 8 on described water inlet pipe 7 and the rising pipe 5.
Described TiO
2 Annular plate 3 is provided with 6 holes, and percentage of open area is 1.3%, the center of circle and the TiO in two adjacent holes
2The angle that the line in annular plate 3 centers of circle forms becomes 60 degree, wherein adjacent center, 3 holes and TiO
2 Annular plate 3 distance of center circle are from being 4/3 * TiO
2 Annular plate 3 internal diameters, 3 hole distance of center circle TiO in addition
2 Annular plate 3 distance of center circle are from being 7/3 * TiO
2 Annular plate 3 internal diameters; Adjacent two TiO
2Install annular plate 3 position, hole of staggering, per two plates dislocation 40 degree clockwise from an end to the other end.The hole dislocation is put and is made the dynamic characteristic of current change, and has increased biological particless such as the charcoal bacterium collision TiO of aqueous phase
2The frequency of plate prolongs the charcoal bacterium particulate residence time, has overcome short shortcoming of HO life-span, has improved sterilisation effect.
Reactor action effect: 175 seconds residence time, disinfection efficiency 99.8%, 86/mL of survival bacterial number, UV/TiO
2Disinfectant recovery motility rate 8.3%.
A kind of ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon is by outer tube 1, inner sleeve 2, TiO
2 Annular plate 3, ultraviolet lamp 4, rising pipe 5 and water inlet pipe 7 are formed, be provided with inner sleeve 2 in the described outer tube 1, with the glass cement sealing and fixing, the gap between outer tube 1 and the inner sleeve 2 is vertically arranged and is provided with 12 TiO with poly (methyl methacrylate) plate for outer tube 1 two ends and inner sleeve 2 outer walls
2 Annular plate 3, adjacent two TiO
2 Annular plate 3 spacings are 2.5 * TiO
2The internal diameter of annular plate 3, TiO
2The contact site seals with glass cement between annular plate 3, inner sleeve 2 and the outer sleeve 1.Ultraviolet lamp 4 is located in the inner sleeve 2, makes full use of the ultraviolet irradiation scope, prevents that ultraviolet ray from leaking, and is convenient to ultraviolet lamp and TiO simultaneously
2Installing and fixing of annular plate, the axle center and the TiO of the axle center of described outer tube 1, inner sleeve 2
2 Annular plate 3 be centered close to same axis; The two ends of outer tube 1 are respectively equipped with water inlet pipe 7 and rising pipe 5.Wherein the water outlet of activated carbon treatment technology enters from water inlet pipe 7, and the water of flowing through is under ultraviolet lamp 4 irradiation and TiO
2 Annular plate 3 catalytic association effects are sterilization down, and the water outlet after the sterilization is discharged through rising pipe 5.The cylindrical-concentric sleeve body makes streamflow regime steady, avoids producing the slough, and hydraulics is superior.With glass cement with TiO
2Contact site sealing between annular plate 3, inner sleeve 2 and the outer sleeve 1.
One port of described inner sleeve 2 is provided with cooling fan 6, and cooling fan 6 turns round all the time to reduce the heat that ultra violet lamp produces.
Described outer tube 1 is 4: 1 with the diameter ratio of inner sleeve 2.
Described outer tube 1 material is a synthetic glass, and inner sleeve 2 materials are quartzy.
Be respectively equipped with valve 8 on described water inlet pipe 7 and the rising pipe 5.
Described TiO
2 Annular plate 3 is provided with 6 holes, and percentage of open area is 1.5%, the center of circle and the TiO in two adjacent holes
2The angle that the line in annular plate 3 centers of circle forms becomes 60 degree, wherein adjacent center, 3 holes and TiO
2 Annular plate 3 distance of center circle are from being 4/3 * TiO
2 Annular plate 3 internal diameters, 3 hole distance of center circle TiO in addition
2 Annular plate 3 distance of center circle are from being 7/3 * TiO
2 Annular plate 3 internal diameters; Adjacent two TiO
2Install annular plate 3 position, hole of staggering, per two plates dislocation 40 degree clockwise from an end to the other end.The hole dislocation is put and is made the dynamic characteristic of current change, and has increased biological particless such as the charcoal bacterium collision TiO of aqueous phase
2The frequency of plate prolongs the charcoal bacterium particulate residence time, has overcome short shortcoming of HO life-span, has improved sterilisation effect.
Reactor action effect: 183 seconds time of staying, disinfection efficiency 99.9%, 65/mL of survival bacterial number, UV/TiO2The recovery motility rate 7.7% of sterilization.
Claims (7)
1. ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon is by outer tube (1), inner sleeve (2), TiO
2Annular plate (3), ultraviolet lamp (4), rising pipe (5) and water inlet pipe (7) are formed, it is characterized in that being provided with in the described outer tube (1) inner sleeve (2), with the glass cement sealing and fixing, the gap between outer tube (1) and the inner sleeve (2) is vertically arranged and is provided with some TiO with poly (methyl methacrylate) plate for outer tube (1) two ends and inner sleeve (2) outer wall
2Annular plate (3), adjacent two TiO
2Annular plate (3) spacing is (2.0～2.5) * TiO
2The internal diameter of annular plate (3), ultraviolet lamp (4) are located in the inner sleeve (2), the axle center and the TiO of the axle center of described outer tube (1), inner sleeve (2)
2Annular plate (3) be centered close to same axis; The two ends of outer tube (1) are respectively equipped with water inlet pipe (7) and rising pipe (5).
2. according to the described ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon of claim 1, it is characterized in that a port of described inner sleeve (2) is provided with cooling fan (6).
3. according to the described ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon of claim 1, it is characterized in that the described outer tube (1) and the diameter ratio of inner sleeve (2) are 3: 1～4: 1.
4. according to the described ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon of claim 1, it is characterized in that described outer tube (1) material is a synthetic glass, inner sleeve (2) material is quartzy.
5. according to the described ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon of claim 1, it is characterized in that being respectively equipped with valve (8) on described water inlet pipe (7) and the rising pipe (5).
6. according to the described ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon of claim 1, it is characterized in that described TiO
2The contact site seals with glass cement between annular plate (3), inner sleeve (2) and the outer sleeve (1).
7. according to the described ultraviolet/titanium dioxide (UV/TiO 2) reactor for disinfecting drinking water treated by activated carbon of claim 1, it is characterized in that described TiO
2Annular plate (3) is provided with 6 holes, and percentage of open area is 1～1.5%, the center of circle and the TiO in two adjacent holes
2The angle that the line in annular plate (3) center of circle forms becomes 60 degree, wherein adjacent center, 3 holes and TiO
2Annular plate (3) distance of center circle is from being 4/3 * TiO
2Annular plate (3) internal diameter, 3 hole distance of center circle TiO in addition
2Annular plate (3) distance of center circle is from being 7/3 * TiO
2Annular plate (3) internal diameter; Adjacent two TiO
2Install annular plate (3) position, hole of staggering, per two plates dislocation 40 degree clockwise from an end to the other end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100172245A CN101723484B (en) | 2010-01-05 | 2010-01-05 | Ultraviolet/titanium dioxide (UV/TiO2) reactor for disinfecting drinking water treated by activated carbon |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100172245A CN101723484B (en) | 2010-01-05 | 2010-01-05 | Ultraviolet/titanium dioxide (UV/TiO2) reactor for disinfecting drinking water treated by activated carbon |
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| CN101723484A true CN101723484A (en) | 2010-06-09 |
| CN101723484B CN101723484B (en) | 2012-05-09 |
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| CN2010100172245A Expired - Fee Related CN101723484B (en) | 2010-01-05 | 2010-01-05 | Ultraviolet/titanium dioxide (UV/TiO2) reactor for disinfecting drinking water treated by activated carbon |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150561A (en) * | 2014-08-18 | 2014-11-19 | 南京工业大学 | Photocatalytic disinfection reactor used for disinfecting reclaimed water and rainwater, photocatalysis material and preparation method thereof, application and application method thereof |
| CN105217712A (en) * | 2015-09-09 | 2016-01-06 | 洛阳理工学院 | A kind of Supported On Granular Activated Carbon nitrogen decorated nanometer titanium dioxide drinking water disinfection tank |
| CN107459103A (en) * | 2017-08-17 | 2017-12-12 | 甘肃省膜科学技术研究院 | The equipment handled using photochemical catalytic oxidation cooling circulating water and landscape water |
| CN109250788A (en) * | 2018-10-16 | 2019-01-22 | 佛山市皓腾光电科技有限公司 | A kind of bilayer sleeve ultraviolet sterilizer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6315963B1 (en) * | 2000-03-22 | 2001-11-13 | Samuel E. Speer | Method and apparatus for the enhanced treatment of fluids via photolytic and photocatalytic reactions |
| CN201024105Y (en) * | 2006-06-13 | 2008-02-20 | 万向阳 | Ozone photocatalytic water purifier |
| CN201082870Y (en) * | 2007-07-03 | 2008-07-09 | 杨春辉 | Device for treating sewage |
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2010
- 2010-01-05 CN CN2010100172245A patent/CN101723484B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150561A (en) * | 2014-08-18 | 2014-11-19 | 南京工业大学 | Photocatalytic disinfection reactor used for disinfecting reclaimed water and rainwater, photocatalysis material and preparation method thereof, application and application method thereof |
| CN105217712A (en) * | 2015-09-09 | 2016-01-06 | 洛阳理工学院 | A kind of Supported On Granular Activated Carbon nitrogen decorated nanometer titanium dioxide drinking water disinfection tank |
| CN107459103A (en) * | 2017-08-17 | 2017-12-12 | 甘肃省膜科学技术研究院 | The equipment handled using photochemical catalytic oxidation cooling circulating water and landscape water |
| CN109250788A (en) * | 2018-10-16 | 2019-01-22 | 佛山市皓腾光电科技有限公司 | A kind of bilayer sleeve ultraviolet sterilizer |
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| CN101723484B (en) | 2012-05-09 |
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