CN111484176A - Dual-waveband ultraviolet light catalytic advanced oxidation device and process - Google Patents
Dual-waveband ultraviolet light catalytic advanced oxidation device and process Download PDFInfo
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- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
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Abstract
A dual-waveband ultraviolet light catalytic advanced oxidation process pretreats wastewater to be treated; mixing the pretreated wastewater with gas; enabling the mixed gas phase and liquid phase to pass through a reactor, reacting on the surface of a catalytic bed, arranging a short-wave ultraviolet light source and a long-wave ultraviolet light source in the reactor close to the catalytic bed, enabling oxygen in water to perform chain reaction under the irradiation of the short-wave ultraviolet light and polymerize into ozone, enabling the ozone to perform cracking reaction under the irradiation of the long-wave ultraviolet light to generate hydroxyl free radicals with strong oxidizing property, and degrading and mineralizing most organic matters under the oxidizing action of the hydroxyl free radicals to realize sewage purification; and (4) carrying out gas/water separation on the wastewater after full reaction, and purifying the gas phase obtained by separation and then discharging. The invention also provides a dual-waveband ultraviolet light catalytic advanced oxidation device, which realizes the unification of the yield and the operation cost of active substances in a reaction system by constructing a multi-waveband photocatalytic system.
Description
Technical Field
The invention belongs to the technical field of environmental protection, relates to water treatment, and particularly relates to a double-waveband ultraviolet light catalytic advanced oxidation device and a double-waveband ultraviolet light catalytic advanced oxidation process.
Background
Along with the acceleration of the industrialization process, the discharge amount of urban sewage and the complexity of pollutants are continuously improved, the types of pollutants difficult to degrade are correspondingly increased, and the COD (chemical oxygen demand) is increasedCrThe contribution rate of the method increases the difficulty of biochemical treatment of the sewage, and the exploration of economic and efficient treatment technology is difficult to strengthenThe removal of degradation pollutants is a great challenge in the field of environmental protection. Advanced oxidation technologies have become a focus of research in recent years. The advanced oxidation technology comprises technical systems such as photocatalysis, ozone oxidation, Fenton reaction and the like. The photocatalysis technology is well received by the industry by taking the advantages of utilizing photochemical energy conversion means and not using strong oxidant, but the generation rate and yield of strong oxidative free radicals in the system are limited under the condition of no strong oxidant, and the applicability to organic wastewater with higher concentration is particularly poor; the problem of low reaction efficiency is effectively solved in a Fenton reaction system, and the synergistic effect of flocculation and precipitation is highlighted, however, the use of the technology is also restricted by the output of the metal mud, and the control of the metal mud yield is a technical bottleneck to be broken through urgently. Because the ozone has extremely strong oxidizing ability and the oxidation-reduction potential of 2.07V, the ozone is only inferior to fluorine in alkaline solution, the ozone has good oxidizing and degrading effects on pollutants difficult to be biochemically degraded, and the ozone has simple preparation method, mature technology, good industrial application potential and wide attention, however, the low dissolution rate of the ozone in water is a key factor restricting the improvement of the ozone utilization rate, and extremely high treatment cost is caused. Therefore, the synergistic effect of multiband ultraviolet light is considered, oxygen in the air is used as an oxidant, the chain reaction of ozone generation and utilization is realized in a reaction system, ozone is not directly added, the equipment investment and the operation cost are reduced, meanwhile, the balance of ozone generation and use is realized, and the problem of low ozone utilization rate of an ozone-based advanced oxidation technology is fundamentally broken through.
Disclosure of Invention
In order to overcome the defects of the prior art, aiming at two technical bottlenecks of low yield of strong oxidizing substances and high operation cost in the advanced oxidation technology, the invention aims to provide a dual-band ultraviolet light catalytic advanced oxidation device and process, which realize the unification of the yield of active substances and the operation cost in a reaction system by constructing a multi-band photocatalytic system.
In order to achieve the purpose, the invention adopts the technical scheme that:
a dual-band ultraviolet light catalytic advanced oxidation process, comprising:
step one, wastewater to be treated is pretreated;
mixing the pretreated wastewater with gas;
thirdly, enabling the mixed gas phase and the mixed liquid phase to pass through a reactor, reacting on the surface of a catalytic bed, arranging a short-wave ultraviolet light source and a long-wave ultraviolet light source in the reactor close to the catalytic bed, enabling oxygen in water to perform chain reaction under the irradiation of the short-wave ultraviolet light and polymerize into ozone, enabling the ozone to perform cracking reaction under the irradiation of the long-wave ultraviolet light to generate hydroxyl free radicals with strong oxidizing property, and degrading and mineralizing most organic matters under the oxidizing action of the hydroxyl free radicals to realize sewage purification;
and step four, carrying out gas/water separation on the wastewater after full reaction, and discharging the separated gas phase after purification.
The pretreatment is to remove large-particle-size particulate matters and suspended matters through filtration or precipitation so as to reduce the deposition of organic particles and inorganic particles on a catalytic bed, the SS content of the pretreated wastewater is not higher than 20 mg/L, and the gas is air or oxygen and is fed by a fan to be mixed with the pretreated wastewater in a gas/water mixer.
The invention also provides a double-waveband ultraviolet light catalytic advanced oxidation device, which comprises a reactor 4 with a catalytic bed 8, wherein the inlet and the outlet of the reactor 4 are respectively connected with a gas/water mixer 10 and a gas/water separator 5, and the double-waveband ultraviolet light catalytic advanced oxidation device is characterized in that a short-wave ultraviolet lamp 7 and a long-wave ultraviolet lamp 9 are arranged in the reactor 4 and close to the catalytic bed 8.
The catalytic bed 8 is a fixed bed or a fluidized bed, the fixed bed adopts a form that a catalyst is attached to the surface of a carrier, the shape and the structure meet the design requirements of the reactor, the catalyst in the fluidized bed is mixed with wastewater and uniformly dispersed in the water, when the fixed bed is used, the reactor 4 is internally provided with a plurality of sections of catalytic beds 8, a plurality of short-wave ultraviolet lamps 7 and long-wave ultraviolet lamps 9 are uniformly arranged around each section of catalytic bed 8, and the short-wave ultraviolet lamps 7 and the long-wave ultraviolet lamps 9 are uniformly and alternately arranged at equal intervals.
The catalyst is nano titanium dioxide, and the catalyst carrier is foamed nickel.
The short-wave ultraviolet lamp 7 is a 185nm ultraviolet lamp, and the long-wave ultraviolet lamp 9 is a 254nm ultraviolet lamp.
The inlet of gas/water blender 10 connects the export of preprocessor 1 and the export of fan 3, and the entry of preprocessor 1 connects the pending waste water, gas phase outlet of gas/water separator 5 connects tail gas cleaning ware 6, the structure of reactor 4 is vertical tube formula, horizontal tube formula, box or pot-type, and the material is stainless steel or carbon steel, preprocessor 1 is wrong hole stainless steel filter, quartz sand filter or filter cloth filtering pond, gas/water blender 10 is venturi gas distribution device, micropore aeration device or efflux aeration device, gas/water separator 5 is knockout drum, disengagement tank or separator, tail gas cleaning ware 6 is based on catalytic oxidation or reductant absorption purification principle.
The invention may also include a cleaning device for cleaning the reactor 4, the short wave ultraviolet lamp 7 and the long wave ultraviolet lamp 9, the cleaning device being a brush cleaner, a rubber ring scraper, a high pressure air flow sweeping device or a high pressure water flow sweeping device.
Compared with the prior art, the invention improves the degradation efficiency of the reaction system by using the cooperation of the multiband ultraviolet light source, and fundamentally reduces the operation and investment cost. The invention is based on photocatalysis, achieves the same treatment effect of catalytic ozonation, realizes the operation effect of low investment and high output, and breaks through two technical bottlenecks of low photocatalytic efficiency and high ozone oxidation cost.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present invention.
Figure 2 is a schematic cross-sectional view of the catalytic bed and light source arrangement.
FIG. 3 shows the effect of the present invention on treating effluent from the secondary sedimentation tank of an industrial park.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
The invention relates to a double-waveband ultraviolet light catalysis advanced oxidation process, which realizes high-efficiency and rapid degradation of refractory organic matters on the basis of ultraviolet light catalysis through synergistic action of two ultraviolet light sources with different wavelengths, and comprises the following specific steps of:
step one, pretreatment
The wastewater to be treated is pretreated, mainly large-particle-size particulate matters and suspended matters are filtered or precipitated to reduce the deposition of organic particles and inorganic particles on a catalytic bed, and the SS content of the pretreated wastewater is not higher than 20 mg/L.
Step two, water distribution and gas distribution
Mixing the pretreated wastewater with gas, wherein the gas is air or oxygen, and the gas are mixed by a mechanical gas/water mixer, and the gas and the water are uniformly mixed in the pipeline and then enter a reactor cavity to be filled.
Step three, water quality purification
The mixed gas phase and liquid phase pass through the reactor and react on the surface of the catalyst bed, and active substances with strong oxidizing property are generated in the system under the action of the catalyst to oxidize and degrade organic pollutants in water.
Specifically, a short-wave (185 nm selected by the invention) ultraviolet light source and a long-wave (254 nm selected by the invention) ultraviolet light source are arranged in the reactor close to a catalytic bed, the short-wave ultraviolet light source and the long-wave ultraviolet light source are started in sequence in the reaction process, oxygen (oxidant) in water is subjected to chain reaction under the irradiation of the short-wave ultraviolet light in the presence of a catalyst to polymerize into ozone, the ozone is subjected to cracking reaction under the irradiation of the long-wave ultraviolet light to generate hydroxyl free radicals with strong oxidizing property, and most organic matters are degraded and mineralized under the oxidizing effect of the hydroxyl free radicals to realize sewage purification.
Step four, gas/water separation
And (4) carrying out gas-liquid two-phase separation on the wastewater after full reaction, wherein the liquid phase is the purified sewage.
Step five, tail gas purification
The separated gas phase is purified, mainly to destroy redundant ozone, and is directly discharged after purification.
Step six, cleaning
The equipment runs for a long time, attachments are easily generated on the light source and the catalytic bed, most of the attachments are algae and organic sediments, the algae and the organic sediments need to be cleaned regularly, and the sufficient illumination and the catalyst activity are ensured.
Referring to fig. 1, the present invention also provides a dual-band ultraviolet light catalytic advanced oxidation apparatus, comprising a reactor 4 with a catalytic bed 8, wherein the inlet and the outlet of the reactor 4 are respectively connected with a gas/water mixer 10 and a gas/water separator 5, and short-wave ultraviolet lamps 7 and long-wave ultraviolet lamps 9 are arranged in the reactor 4 near the catalytic bed 8.
The basic form of the catalytic bed 8 is divided into a fixed bed and a fluidized bed, wherein the fixed bed adopts a form that the catalyst is attached to the surface of the carrier, the shape and the structure meet the design requirements of the reactor, and the catalyst in the fluidized bed is mixed with the waste water and uniformly dispersed in the water. In the case of a fixed bed, the reactor 4 has multiple catalytic beds 8, and a plurality of short-wavelength ultraviolet lamps 7 and long-wavelength ultraviolet lamps 9 are uniformly arranged around each catalytic bed 8, and the short-wavelength ultraviolet lamps 7 and the long-wavelength ultraviolet lamps 9 are uniformly staggered at equal intervals, as shown in fig. 2.
The catalyst has higher catalytic activity, is synthesized by variable valence metals, is preferably nano titanium dioxide, and other catalysts meeting the use requirements of the invention are also included in the protection scope of the invention.
The surface of the catalyst carrier is porous, the catalyst carrier can be tightly combined with the catalyst, materials with good porous stability and strong plasticity are mostly adopted, the invention prefers foamed nickel, and other carriers meeting the use requirements of the invention are also included in the protection scope of the invention.
The short-wave ultraviolet lamp 7 is mainly used for exciting oxygen in water to generate ozone on the surface of a catalyst bed, and the long-wave ultraviolet lamp 9 is mainly used for exciting the ozone to generate free radicals with strong oxidizing property. In the invention, the short-wave ultraviolet lamp 7 is a 185nm ultraviolet lamp, the long-wave ultraviolet lamp 9 is a 254nm ultraviolet lamp, and other ultraviolet light sources meeting the use requirements of the invention are included in the protection scope of the invention.
The inlet of the gas/water mixer 10 is connected with the outlet of the preprocessor 1 and the outlet of the fan 3, the inlet of the preprocessor 1 is connected with the wastewater to be treated, the outlet is connected with the water supply pump 2, and the gas phase outlet of the gas/water separator 5 is connected with the tail gas purifier 6.
The structure of the reactor 4 can adopt various forms, including a vertical pipe type, a horizontal pipe type, a box type, a tank type and the like, and the horizontal pipe type is preferred in the invention; the material of the reactor 4 can be stainless steel, carbon steel corrosion-resistant and other hard materials, and the stainless steel is preferred in the invention. Any reactor configuration and materials that are sufficient for the operation of the system are within the scope of the present invention.
The gas/water mixer 10 achieves the purpose of uniformly mixing gas and liquid phases through mechanical mixing, a Venturi mixing gas distribution device, a micropore aeration device, a jet aeration device and the like can be used, the Venturi mixing gas distribution device is preferred in the invention, and other water distribution and gas distribution devices meeting the use requirements of the invention are included in the protection scope of the invention.
The preprocessor 1 can use a staggered hole stainless steel filter, a quartz sand filter, a cloth filter and the like, preferably a staggered hole stainless steel filter, and other preprocessing devices meeting the use requirements of the invention are included in the protection scope of the invention.
The gas/water separator 5 can fully separate gas phase and liquid phase in the wastewater after reaction, and can use a separating tank, a separating cabin, a separator and the like, the separating tank is optimized, the height-diameter ratio is not less than 3:1, and the retention time of the wastewater in the separating cabin is not less than 30 min. Other gas/water separation devices that meet the requirements of use of the present invention are also within the scope of the present invention.
The tail gas purifier 6 mainly aims at destroying ozone in the tail gas, and can adopt methods/principles of catalytic oxidation, reducing agent absorption and the like, the invention adopts a catalytic oxidation method, and other tail gas purifying methods meeting the use requirements of the invention are also included in the protection scope of the invention
The invention can also comprise a cleaning device for cleaning the reactor 4, the short-wave ultraviolet lamp 7 and the long-wave ultraviolet lamp 9, the cleaning device can adopt the forms of a brush cleaner, a rubber ring scraper, high-pressure air flow sweeping, high-pressure water flow sweeping and the like, and any cleaning mode which can meet the operation of the system is included in the protection scope of the invention.
Examples of applications are:
the method takes the effluent of the secondary sedimentation tank of the actual sewage plant in the chemical industry park as a research object, and examines the degradation effect of the dual-waveband ultraviolet light catalytic advanced oxidation process on characteristic organic substances, namely quinoline and other substances, such as quinoline. And meanwhile, measuring the conventional indexes of water quality: CODcr, TOC, UV254Biochemical effluent quality including TOC 65.6 mg/L, pH 8.79, CODcr 138 mg/L and quinoline C0＝36.34mg/L，UV254＝1.577。
As can be seen from FIG. 3, the quinoline in the actual wastewater was completely degraded at the treatment time of 6 min. Quinoline concentration, CODcr, TOC, UV in water as a function of time254Are effectively reduced. The method has good industrial application potential, and shows that the dual-band ultraviolet light catalytic advanced oxidation process has good quinoline degradation effect, and other pollutants in the actual wastewater do not have critical influence on the quinoline degradation.
Therefore, the invention constructs an advanced oxidation reaction system without external strong oxidant, realizes the improvement of photocatalytic efficiency, improves the safety of the advanced oxidation reaction system, fundamentally reduces the direct operation cost of sewage purification, and breaks through the technical bottleneck of low utilization rate of strong oxidants such as ozone, hydrogen peroxide and the like in the traditional advanced oxidation system.
Claims (9)
1. A dual-band ultraviolet light catalytic advanced oxidation process is characterized by comprising the following steps:
step one, wastewater to be treated is pretreated;
mixing the pretreated wastewater with gas;
thirdly, enabling the mixed gas phase and the mixed liquid phase to pass through a reactor, reacting on the surface of a catalytic bed, arranging a short-wave ultraviolet light source and a long-wave ultraviolet light source in the reactor close to the catalytic bed, enabling oxygen in water to perform chain reaction under the irradiation of the short-wave ultraviolet light and polymerize into ozone, enabling the ozone to perform cracking reaction under the irradiation of the long-wave ultraviolet light to generate hydroxyl free radicals with strong oxidizing property, and degrading and mineralizing most organic matters under the oxidizing action of the hydroxyl free radicals to realize sewage purification;
and step four, carrying out gas/water separation on the wastewater after full reaction, and discharging the separated gas phase after purification.
2. The dual band ultraviolet light catalyzed advanced oxidation process as claimed in claim 1, wherein the pretreatment is to remove large particle size particles and suspended matters by filtration or precipitation, thereby reducing the deposition of organic particles and inorganic particles on the catalytic bed, the SS content of the pretreated wastewater is not higher than 20 mg/L, the gas is air or oxygen, and the gas is fed by a blower and mixed with the pretreated wastewater in a gas/water mixer.
3. The dual band uv catalyzed advanced oxidation process as claimed in claim 1, wherein the short wavelength is 185nm and the long wavelength is 254 nm.
4. A double-waveband ultraviolet light catalysis advanced oxidation device comprises a reactor (4) with a catalytic bed (8), wherein an inlet and an outlet of the reactor (4) are respectively connected with a gas/water mixer (10) and a gas/water separator (5), and the double-waveband ultraviolet light catalysis advanced oxidation device is characterized in that a short-wave ultraviolet lamp (7) and a long-wave ultraviolet lamp (9) are arranged in the reactor (4) and close to the catalytic bed (8).
5. The dual band uv catalytic advanced oxidation apparatus as claimed in claim 4, wherein the catalytic bed (8) is a fixed bed or a fluidized bed, the fixed bed is in the form of catalyst attached to the surface of the carrier, the shape and structure of the fixed bed meet the design requirements of the reactor, the catalyst in the fluidized bed is mixed with the wastewater and uniformly dispersed in the water, when the fixed bed is used, the reactor (4) is provided with multiple sections of catalytic beds (8), a plurality of short-wave uv lamps (7) and long-wave uv lamps (9) are uniformly arranged around each section of catalytic bed (8), and the short-wave uv lamps (7) and the long-wave uv lamps (9) are uniformly and alternately arranged at equal intervals.
6. The dual-band ultraviolet photocatalytic advanced oxidation apparatus as set forth in claim 5, wherein the catalyst is nano titanium dioxide and the catalyst support is foamed nickel.
7. The dual-band uv photocatalytic advanced oxidation apparatus according to claim 4 or 5, wherein the short-wave uv lamp (7) is a 185nm uv lamp, and the long-wave uv lamp (9) is a 254nm uv lamp.
8. The dual-band ultraviolet photocatalytic advanced oxidation apparatus as set forth in claim 4 or 5, the inlet of the gas/water mixer (10) is connected with the outlet of the preprocessor (1) and the outlet of the fan (3), the inlet of the preprocessor (1) is connected with the wastewater to be treated, the gas phase outlet of the gas/water separator (5) is connected with an exhaust gas purifier (6), the reactor (4) is in a vertical pipe type, a horizontal pipe type, a box type or a tank type, is made of stainless steel or carbon steel, the preprocessor (1) is a staggered hole stainless steel filter, a quartz sand filter or a cloth filter, the gas/water mixer (10) is a Venturi mixing gas distribution device, a micropore aeration device or a jet aeration device, the gas/water separator (5) is a separation tank, a separation cabin or a separator, and the tail gas purifier (6) is based on the catalytic oxidation or reducing agent absorption purification principle.
9. The dual band UV-photocatalytic advanced oxidation apparatus as set forth in claim 4 or 5, further comprising a cleaning device for cleaning the reactor (4), the short-wave UV lamp (7) and the long-wave UV lamp (9), wherein the cleaning device is a brush cleaner, a rubber ring scraper, a high-pressure air flow sweeping device or a high-pressure water flow sweeping device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456273.2A CN111484176A (en) | 2020-05-26 | 2020-05-26 | Dual-waveband ultraviolet light catalytic advanced oxidation device and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456273.2A CN111484176A (en) | 2020-05-26 | 2020-05-26 | Dual-waveband ultraviolet light catalytic advanced oxidation device and process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112093849A (en) * | 2020-09-09 | 2020-12-18 | 胡茂刚 | Ultraviolet light hydrogen peroxide catalytic oxidation device and process thereof |
| CN113233658A (en) * | 2021-04-16 | 2021-08-10 | 润泰新材料股份有限公司 | Phthalate process wastewater treatment system |
| CN115611448A (en) * | 2022-08-11 | 2023-01-17 | 广东工业大学 | Waste water purification device and purification system |
| CN116282466A (en) * | 2022-12-30 | 2023-06-23 | 南京大学盐城环保技术与工程研究院 | Photocatalytic oxidation process and reaction device for treating high-concentration refractory organic wastewater |
| WO2023249570A1 (en) * | 2022-06-23 | 2023-12-28 | Ponglikhittanon Apichet | Method and system for gas treatment and purification by modified advanced oxidation technology |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0824629A (en) * | 1994-07-08 | 1996-01-30 | Kurita Water Ind Ltd | Photo-catalytic reaction tank |
| US5675153A (en) * | 1993-10-06 | 1997-10-07 | Snowball; Malcolm Robert | UV apparatus for fluid treatment |
| JP2006158986A (en) * | 2004-12-02 | 2006-06-22 | Hideki Yamamoto | Water treatment method and device using ultraviolet light with ozone |
| GB0909889D0 (en) * | 2009-06-09 | 2009-07-22 | Jenact Ltd | Ozone Generator |
| WO2010093796A1 (en) * | 2009-02-13 | 2010-08-19 | Lee Antimicorbial Solutions Llc | Uv air treatment method and device |
| CN201890785U (en) * | 2010-11-03 | 2011-07-06 | 陕西天安环保科技有限公司 | Treatment device for carrying out photo catalytic oxidation on waste water by three-phase fluidized bed |
| CN203392896U (en) * | 2013-08-06 | 2014-01-15 | 上海银木电器制造有限公司 | Integrated UV (ultraviolet) photocatalytic oxidation wastewater treatment device |
| CN203419767U (en) * | 2013-08-06 | 2014-02-05 | 上海银木电器制造有限公司 | Wastewater recovery and treatment system based on UV photocatalytic oxidation |
| CN103964614A (en) * | 2014-05-28 | 2014-08-06 | 南京麦得文环保科技有限公司 | Compound ozone light-catalyzed reaction device |
| CN104016511A (en) * | 2014-05-27 | 2014-09-03 | 轻工业环境保护研究所 | Ozone / photocatalysis oxidation-membrane separation integrated method and integrated set for advanced wastewater treatment |
| CN204625249U (en) * | 2015-04-30 | 2015-09-09 | 济宁学院 | The reactive agent device of photocatalytic waste water treatment |
| CN205953589U (en) * | 2016-08-25 | 2017-02-15 | 徐旭 | Reinforcing ultraviolet water treatment facilities |
| CN107803105A (en) * | 2017-11-23 | 2018-03-16 | 广东粤发四众环保服务有限公司 | A kind of ozone free UV photodissociation VOCs reaction units |
| CN108083382A (en) * | 2017-11-20 | 2018-05-29 | 常州工学院 | A kind of photovoltaic photo catalysis reactor |
| CN208532312U (en) * | 2018-07-05 | 2019-02-22 | 铜仁学院 | A kind of organic wastewater light degradation highly effective reaction device |
| CN212713082U (en) * | 2020-05-26 | 2021-03-16 | 清华大学 | Dual-waveband ultraviolet light catalysis advanced oxidation device |
-
2020
- 2020-05-26 CN CN202010456273.2A patent/CN111484176A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5675153A (en) * | 1993-10-06 | 1997-10-07 | Snowball; Malcolm Robert | UV apparatus for fluid treatment |
| JPH0824629A (en) * | 1994-07-08 | 1996-01-30 | Kurita Water Ind Ltd | Photo-catalytic reaction tank |
| JP2006158986A (en) * | 2004-12-02 | 2006-06-22 | Hideki Yamamoto | Water treatment method and device using ultraviolet light with ozone |
| WO2010093796A1 (en) * | 2009-02-13 | 2010-08-19 | Lee Antimicorbial Solutions Llc | Uv air treatment method and device |
| GB0909889D0 (en) * | 2009-06-09 | 2009-07-22 | Jenact Ltd | Ozone Generator |
| CN201890785U (en) * | 2010-11-03 | 2011-07-06 | 陕西天安环保科技有限公司 | Treatment device for carrying out photo catalytic oxidation on waste water by three-phase fluidized bed |
| CN203392896U (en) * | 2013-08-06 | 2014-01-15 | 上海银木电器制造有限公司 | Integrated UV (ultraviolet) photocatalytic oxidation wastewater treatment device |
| CN203419767U (en) * | 2013-08-06 | 2014-02-05 | 上海银木电器制造有限公司 | Wastewater recovery and treatment system based on UV photocatalytic oxidation |
| CN104016511A (en) * | 2014-05-27 | 2014-09-03 | 轻工业环境保护研究所 | Ozone / photocatalysis oxidation-membrane separation integrated method and integrated set for advanced wastewater treatment |
| CN103964614A (en) * | 2014-05-28 | 2014-08-06 | 南京麦得文环保科技有限公司 | Compound ozone light-catalyzed reaction device |
| CN204625249U (en) * | 2015-04-30 | 2015-09-09 | 济宁学院 | The reactive agent device of photocatalytic waste water treatment |
| CN205953589U (en) * | 2016-08-25 | 2017-02-15 | 徐旭 | Reinforcing ultraviolet water treatment facilities |
| CN108083382A (en) * | 2017-11-20 | 2018-05-29 | 常州工学院 | A kind of photovoltaic photo catalysis reactor |
| CN107803105A (en) * | 2017-11-23 | 2018-03-16 | 广东粤发四众环保服务有限公司 | A kind of ozone free UV photodissociation VOCs reaction units |
| CN208532312U (en) * | 2018-07-05 | 2019-02-22 | 铜仁学院 | A kind of organic wastewater light degradation highly effective reaction device |
| CN212713082U (en) * | 2020-05-26 | 2021-03-16 | 清华大学 | Dual-waveband ultraviolet light catalysis advanced oxidation device |
Non-Patent Citations (1)
| Title |
|---|
| 王健锋;许振良;丛梅;杨座国;王中维;: "悬浮态纳米TiO_2光催化降解喹啉的研究", 净水技术, no. 04 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112093849A (en) * | 2020-09-09 | 2020-12-18 | 胡茂刚 | Ultraviolet light hydrogen peroxide catalytic oxidation device and process thereof |
| CN113233658A (en) * | 2021-04-16 | 2021-08-10 | 润泰新材料股份有限公司 | Phthalate process wastewater treatment system |
| WO2023249570A1 (en) * | 2022-06-23 | 2023-12-28 | Ponglikhittanon Apichet | Method and system for gas treatment and purification by modified advanced oxidation technology |
| WO2023249571A1 (en) * | 2022-06-23 | 2023-12-28 | Ponglikhittanon Apichet | Method and system for gas treatment and purification using modified advanced oxidation technology |
| CN115611448A (en) * | 2022-08-11 | 2023-01-17 | 广东工业大学 | Waste water purification device and purification system |
| CN116282466A (en) * | 2022-12-30 | 2023-06-23 | 南京大学盐城环保技术与工程研究院 | Photocatalytic oxidation process and reaction device for treating high-concentration refractory organic wastewater |
| CN116282466B (en) * | 2022-12-30 | 2024-05-03 | 南京大学盐城环保技术与工程研究院 | Photocatalytic oxidation process and reaction device for treating high-concentration refractory organic wastewater |
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