KR101152961B1 - The Advanced oxidation process of waste water treatmemt - Google Patents

Abstract

The present invention relates to a water treatment apparatus for an advanced oxidation process in which an oxidizing agent such as ozone or hydrogen peroxide decomposes pollutants by OH-radicals generated by reaction with ultraviolet rays, and more particularly, xenon or xenon which emits ultraviolet rays in all wavelength ranges. By driving the discharge lamp in the form of high output pulse, the long-wave ultraviolet ray, which is excellent in the OH radical generation reaction by short wavelength ultraviolet ray and the permeability in water but can not react with the oxidant, proceeds at the same time by the reaction of decomposing the oxidizer by the photocatalyst to generate OH radical. Compared with the advanced oxidation reaction, the reaction area where the oxidation reaction proceeds greatly increases the treatment efficiency, and the ultraviolet light is irradiated in the form of pulse to prevent the oxidizing agent and energy waste and to extend the life of the UV lamp. An advanced oxidation process water treatment apparatus.
The advanced oxidation process water treatment apparatus according to the present invention includes a tubular housing having an inlet and an outlet for the inflow and outflow of treated water, a quartz tube inserted into the housing, and an ultraviolet ray inserted into the quartz tube to emit ultraviolet rays. A lamp, an ultraviolet lamp power system for driving the ultraviolet lamp, and a photocatalyst carrier containing titanium dioxide as a main component exposed to the surface and filled in the space between the quartz tube and the housing are included, and are produced using an oxidizing agent. In the advanced oxidation process water treatment apparatus using advanced oxidation reaction to oxidatively decompose contaminants by OH radicals, the ultraviolet lamp is filled with xenon lamp or xenon gas to emit ultraviolet rays in all wavelength ranges, and the ultraviolet lamp power system Drives the ultraviolet lamp in the form of a pulse, and the quartz tube is an ultraviolet lamp. To be in contact with the direct cooling process is characterized in that the hole for treated water flow in and out of the quartz tube is formed.

Description

The advanced oxidation process of waste water treatmemt

The present invention relates to a water treatment apparatus for an advanced oxidation process in which an oxidizing agent such as ozone or hydrogen peroxide decomposes pollutants by OH-radicals generated by reaction with ultraviolet rays, and more particularly, xenon or xenon which emits ultraviolet rays in all wavelength ranges. By driving the discharge lamp in the form of high output pulse, the long-wave ultraviolet ray, which is excellent in the OH radical generation reaction by short wavelength ultraviolet ray and the permeability in water but can not react with the oxidant, proceeds at the same time by the reaction of decomposing the oxidizer by the photocatalyst to generate the OH radical. Compared with the advanced oxidation reaction, the reaction area where the oxidation reaction proceeds greatly increases the treatment efficiency, and the ultraviolet light is irradiated in the form of pulse to prevent the oxidizing agent and energy waste and to extend the life of the UV lamp. An advanced oxidation process water treatment apparatus.

In general, ultraviolet rays may react with oxygen to generate ozone, but decompose ozone. The ultraviolet rays used in the advanced oxidation reaction of the present invention are UV-C (200-280 nm) for disinfecting and decomposing ozone, and photocatalyst UV-A, B (280-400nm), which is mainly used for the reaction, is classified into UV-C (200-280nm). When UV-C is irradiated with dissolved ozone, ozone absorbs ultraviolet rays and photolyzes to produce hydrogen peroxide ( H ₂ O ₂ ) is produced and used for the reaction of decomposing pollutants by OH radicals generated while hydrogen peroxide is decomposed.

When oxidizing agents such as ozone or hydrogen peroxide are irradiated with ultraviolet rays, OH radicals with strong oxidizing power are generated, and the reaction of oxidatively decomposing contaminants using this OH radical is called advanced oxidation reaction and the water treatment method using the advanced oxidation process (Advanced Oxidation) Process, AOP), ozone + hydrogen peroxide (H ₂ O ₂ ), ozone + ultraviolet light, ozone + photocatalyst + ultraviolet light, ozone + ultrasonic waves and the like are known.

The above-mentioned highly oxidized water treatment apparatus generates OH radical (OH °, Hydroxy radical) which has strong oxidizing power as intermediate product, and oxidizes and decomposes organic pollutants in contaminated water. It is a more advanced water treatment technology developed to decompose hardly decomposable substances such as synthetic detergents and pesticides, or to treat high concentrations of contaminants in a short time, and it can be treated with existing treatment methods with environmental pollution and new substances. As the amount of non-decomposable non-degradable material is introduced into the contaminated water, there is a demand for a large-capacity high-oxidation process water treatment device that is more efficient in processing and can effectively treat the increased contaminated water.

In the case of the existing high oxidation reaction using low pressure mercury lamp, it is difficult to commercialize a large water treatment facility because the device is complicated and difficult to manage because a large-capacity water treatment device can be implemented only by using a plurality of UV lamps that emit short wavelength ultraviolet light.

There is a high output medium pressure UV lamp that emits ultraviolet rays (UV-A, B, C) in the full-wave region, but when it is turned on, the surface temperature of the lamp is 800 ~ 1000 ℃. There is a limit to the use of the tubular reactor, there was a problem due to the stop of the water treatment device, as the lamp life should be replaced frequently within about 2000 hours as it must be continuously lit.

The present invention was conceived by recognizing the above points, and an object of the present invention is to drive a xenon or xenon discharge lamp that emits ultraviolet light in the full wavelength region in the form of a pulse of high power to generate OH radicals by the short wavelength ultraviolet ray and the underwater penetration power. The long wavelength ultraviolet rays, which were excellent but could not react with the oxidizing agent, simultaneously proceed with the reaction of generating OH radicals by decomposing the oxidizing agent by the photocatalyst, thereby increasing the treatment area where the oxidation reaction proceeds much better than the conventional high oxidation reaction. In addition, it is possible to provide a highly oxidized process water treatment apparatus that can extend the life of the ultraviolet lamp to prevent oxidizing and waste of energy by irradiating ultraviolet rays in the form of pulse.

In order to achieve the above object, the advanced oxidation process water treatment apparatus according to the present invention includes a tubular housing having an inlet and an outlet for the inflow and outflow of treated water, a quartz tube inserted into the housing, and ultraviolet rays. An ultraviolet lamp inserted into the quartz tube, an ultraviolet lamp power system for driving the ultraviolet lamp, and a photocatalyst carrier filled with a space between the quartz tube and the housing are exposed to the surface of the photocatalyst mainly composed of titanium dioxide. In the advanced oxidation process water treatment apparatus using a high oxidation reaction to oxidatively decompose contaminants by OH radicals generated by using an oxidizing agent, the UV lamp is filled with xenon lamp or xenon gas Emits light, and the ultraviolet lamp power system converts the ultraviolet lamp into a pulse form. The quartz tube is characterized in that a hole for circulating the treated water flows into and out of the quartz tube so that the ultraviolet lamp is directly contacted with the treated water and cooled.

In addition, in the advanced oxidation process water treatment apparatus according to the present invention, when ozone is used as the oxidizing agent, the ozone reacts by increasing the dissolved amount of ozone in the treated water by pressurizing the reaction pressure to a pressure of 1 to 20 atm. .

In addition, the advanced oxidation treatment water treatment apparatus according to the present invention, the photocatalyst carrier is processed to a coil spring shape of the elastic material to the coil spring shape to roughen the outer surface of the coil spring by oxidizing to a temperature of 800 ℃ or less It is characterized by using what produced the titanium dioxide layer on the outer surface.

In addition, the advanced oxidation process water treatment apparatus according to the present invention, the photocatalyst carrier is processed to a coil spring shape of elastic steel to the coil spring shape after roughening the outer surface and coated titanium alkoxide on the outer surface of the coil spring 800 It characterized in that the manufacturing including the step of heat treatment at a temperature below ℃.

According to the above configuration, the advanced oxidation treatment water treatment apparatus according to the present invention drives xenon or xenon discharge lamps emitting ultraviolet rays in all wavelength regions in the form of pulses of high power, thereby producing OH radicals generated by short wavelength ultraviolet rays and having excellent underwater permeability. However, the long-wavelength ultraviolet light, which could not react with the oxidizing agent, simultaneously proceeds with the reaction of generating OH radicals by decomposing the oxidizing agent by the photocatalyst, thereby increasing the reaction area in which the oxidation reaction proceeds significantly compared to the conventional high oxidation reaction, thereby increasing the treatment efficiency. In addition, by irradiating ultraviolet light in the form of pulse, it has the advantage of preventing the oxidizing agent and waste of energy and extending the life of the ultraviolet lamp used.

1 is a view illustrating the comparison of the long- and short-wavelength ultraviolet light transmission in water and the region of high oxidation
2 is a view schematically illustrating an advanced oxidation process water treatment apparatus;
FIG. 3 illustrates a coil spring carrier 40 coated with a photocatalyst and a photocatalyst 42 formed on the wire surface 43.
Figure 4 is a chart comparing the reaction rate of ozone and OH radicals on organic compounds

Hereinafter, an advanced oxidation process water treatment apparatus according to the present invention will be described in detail with reference to the embodiment shown in the drawings.

1 is a view illustrating a comparison between the long- and short-wavelength ultraviolet light in water and a high oxidation reaction region thereof, FIG. 2 is a view schematically illustrating a water treatment apparatus for an advanced oxidation process, and FIG. 3 is a coil spring carrier coated with a photocatalyst ( 40) and a photocatalyst 42 formed on the wire surface 43. FIG. 4 is a chart comparing reaction rates of ozone and OH radicals with respect to organic compounds.

Referring to the drawings, the advanced oxidation reaction water treatment apparatus according to the present invention is a tubular housing 51 having an inlet 52 and an outlet 53 through which the treated water flows in and out, and is inserted into the housing 51. The quartz tube 54, an ultraviolet lamp 55 inserted into the quartz tube 54 to emit ultraviolet light, an ultraviolet lamp power system 100 for driving the ultraviolet lamp, and titanium dioxide as main components The photocatalyst 42 is exposed to the surface and includes a photocatalyst carrier 40 filled in the space between the quartz tube 54 and the housing 51 to oxidize contaminants by OH radicals generated using an oxidant. The treated water is treated using a decomposing advanced oxidation reaction.

Advanced oxidation reaction water treatment apparatus according to an embodiment of the present invention is a xenon lamp or a xenon gas-filled ultraviolet lamp 40 and the ultraviolet lamp power system for driving the ultraviolet lamp in the form of a pulse to emit ultraviolet light in all wavelength ranges (100), a photocatalyst carrier 40 of a coil spring shape in which a photocatalyst mainly composed of titanium dioxide is exposed to the surface, and an advanced oxidation reaction for oxidatively decomposing contaminants using OH radicals generated using ozone as an oxidant. The advanced oxidation reaction device 50 in which the advanced oxidation reaction proceeds by using an ultraviolet lamp in a tubular housing 51 having a square or circular cross-sectional shape made of stainless steel or titanium having an inlet 52 and an outlet 53 is used. The fixing part which fixes 55 is provided. The ultraviolet ray lamp 55 is connected to the power line while keeping airtight with the external power system 100 for supplying electricity. The ultraviolet lamp 55 is inserted into the quartz tube 54 so as to be replaced without emptying the coil spring carrier 40 filled around the ultraviolet lamp 54. The quartz tube 54 is provided with one or more holes through which water freely passes in the side portion for cooling the ultraviolet lamp 55 by water directly. The space between the housing 51 and the quartz tube 54 is filled with a photocatalyst carrier 40 having a coil spring shape.

The advanced oxidation reaction involves 1) dissolving ozone in water, 2) ozone absorbing light with a wavelength of 254 nm, generating OH radicals and reacting with contaminants, and 3) decomposing ozone by ultraviolet and photocatalytic reactions. To generate OH radicals and react with contaminants; and 4) ultraviolet and photocatalysts react to decompose water to produce OH radicals to produce OH radicals.

Although the UV light required for the above 2), 3) and 4) reactions can be used a low pressure and high pressure mercury UV lamp that selectively emits a wavelength of 254 nm, the present invention is a high power ultraviolet light in the three- and four-stage photocatalytic reaction. It is characterized by using a xenon or xenon discharge lamp or a medium pressure mercury lamp that can emit in the form of a pulse. Because conventional low pressure mercury lamps have a short wavelength of 254nm gyro rays that only penetrate the water in a few millimeters and can take part in the reaction near the lamp. There is a drawback to using a lot of densely. In addition, the medium pressure mercury ultraviolet lamp has a high heat generation, the lamp surface temperature is 800 ℃ or more, the lamp life is only about 2000 hours, there is a need to replace frequently.

Discharge lamps filled with xenon or xenon gas, which emit ultraviolet light in the full-wave region, are known to emit wavelength characteristics depending on the characteristics of the full-wavelength region from ultraviolet to visible light and voltage characteristics applied to the discharge lamp. In the present invention, 200 ~ 400nm emitted from the discharge lamp was to use the ultraviolet light as a high oxidation process water treatment apparatus.

In addition, when driving in the form of a pulse to temporarily turn on and off the power supply for driving the discharge lamp in the power supply (Power Supply) that supplies the power required to drive the discharge lamp filled with xenon or xenon gas existing low pressure mercury ultraviolet lamp Compared to emitting hundreds of watts, the output of the ultraviolet lamp can emit up to millions of watts, and the interval between the lights can be arbitrarily adjusted to ㎲.

The advanced oxidation reaction contaminated water treatment apparatus of the present invention mainly proceeds while the polluted water flows around the ultraviolet lamp 55 inside the tubular advanced oxidation reaction apparatus 50, and irradiates the reaction region where the ultraviolet rays are irradiated in the form of pulp, followed by ultraviolet irradiation. OH radical, which has strong oxidizing power even if it is irradiated repeatedly before the polluted water passes, has a faster reaction rate than ozone which is known to be strong oxidizing power as shown in FIG. Can be. In addition, since the OH radicals generated by the continuous ultraviolet irradiation may disappear without contact with the pollutants and only ozone may be consumed, the present invention stops the irradiation for a time when the pollutants and ozone may be mixed or transferred, rather, Strongly doubles the energy to irradiate the ultraviolet rays with pulses to improve the permeability in the water, characterized in that the expansion of the highly oxidized reaction zone.

In addition, since the oxidizing agent and pollutants flow around the UV lamp installed in the center of the cylindrical tube, the advanced oxidation reaction occurs mainly when the UV lamp is continuously lit like the existing high oxidation reaction. Is converted to OH radicals and is used to decompose contaminants. Even when ultraviolet rays are irradiated until new oxidants and contaminants are supplied and replaced, OH radicals cannot be produced.

In addition, OH radicals are not produced when new pollutants or oxidants are not present at the point where ultraviolet rays are irradiated, and because oxidants are not decomposed by ultraviolet rays, oxidants are not used and eventually discarded, which can increase oxidant and energy consumption. .

Ultraviolet rays (UV-A) irradiated with water containing pollutants even when advanced oxidation reactions are carried out using ultraviolet lamps that emit high-frequency ultraviolet rays such as xenon lamps or medium pressure mercury lamps at high power, and ozone or hydrogen peroxide. , B, C) reacts with ozone or hydrogen peroxide in the area where short-wave ultraviolet (UV-C) reaches, ie, near the UV lamp, to generate OH radicals to decompose pollutants, and long-wave ultraviolet (UV-A, B) ) Can reach a long distance from the lamp because of its relatively good permeability in water, but there is a limit to improve the efficiency of the advanced oxidation reaction because it cannot be utilized because it cannot generate OH radicals by reacting with an oxidant. Accordingly, the present invention adopts a method for treating highly oxidized reaction contaminated water using a photocatalyst together with an ultraviolet lamp that emits high-frequency ultraviolet rays at high power, such as a xenon lamp or a medium pressure mercury lamp, to radiate irradiated into the treated water containing contaminants. Short-wave ultraviolet (UV-C) of the long-range ultraviolet rays (UV-A, B, C) is responsible for decomposing pollutants by decomposing ozone or hydrogen peroxide near the ultraviolet lamp to generate OH radicals. Although UV-A, B) has relatively good permeability in water, even though it can reach far from the lamp, it is not possible to generate OH radicals in the existing high oxidation reaction, but it is an electron hole generated on the surface of the photocatalyst by irradiation with the photocatalyst. OH radicals can be produced to decompose contaminants, greatly increasing the advanced oxidation reaction zone than the existing advanced oxidation reactions. May be (see Figure 2)

In addition, by driving the xenon or xenon discharge lamp in the form of pulse, the instantaneous output of UV light can be increased up to tens of thousands of times. The oxidation reaction apparatus can be configured using a small number of ultraviolet lamps to solve the problem of complicated and difficult management due to the large number of lamps.

However, when using a medium pressure mercury lamp, the lamp surface temperature is very high, the lifespan is short, and there is a problem in commercialization because the output can only produce several tens of kilowatts, the present invention has a problem in the commercialization of the lamp surface, And to cool the lamp in contact. To this end, a distribution hole through which the treated water can be distributed is formed in the quartz tube surrounding the lamp.

In case of water purification plant that purifies surface water such as river water, it is mostly a large-capacity facility that is supplied as a pipe of 1,000 ~ 2,500mm, and it is difficult to apply by the existing advanced oxidation technology, but the xenon or xenon discharge lamp of the present invention is pulsed. The advanced oxidation reaction apparatus using a driving system and a photocatalyst can be used for a large capacity water treatment apparatus.

When a discharge lamp filled with xenon or xenon gas is used in the advanced oxidation reaction device 50 with the pulsed ultraviolet lamp 55 of the present invention, a desired frequency of high power ultraviolet rays while contaminants pass through the advanced oxidation device 50 is desired. It can be irradiated as much as possible, and by introducing a photocatalyst that can utilize long wavelength ultraviolet rays, it is possible to maximize the efficiency of advanced oxidation reaction by dramatically increasing the range of advanced oxidation reaction, and to arbitrarily adjust the interval to turn on the pulse UV lamp as needed. Since it can be irradiated, it prevents unnecessary UV irradiation and saves energy and the amount of oxidant such as ozone or hydrogen peroxide. It provides advanced oxidation process water treatment system that can drastically reduce the size, installation cost and operation cost of advanced oxidation reaction water treatment device. do.

In the case of the contaminated water treatment system using the existing high oxidation reaction, the high oxidation oxidation device has to use a plurality of ultraviolet lamps due to the limited reaction range because the short-wave ultraviolet (UV-C) which is involved in OH radical generation by decomposing oxide is low. In case of using a high power ultraviolet lamp to increase the underwater penetration, there is a difficulty in operation and management due to high heat generation and increased energy consumption. The oxidant use efficiency decreases as it exits the advanced oxidation reactor in the reaction state, and by irradiating ultraviolet rays continuously more than necessary in the advanced oxidation reactor, the oxidizing agent ozone or OH radical generated by hydrogen peroxide reacts with the pollutant and the oxidation reaction. Tubes that are not used, discarded, or are irradiated Energy consumption is a big problem is, this is shorter lamp life.

In the present invention, in the highly oxidized reaction using pulsed ultraviolet lamp, OH radical generation reaction by short wavelength ultraviolet light (UV-C) and oxidizing agent using ultraviolet lamp and photocatalyst in the full-wavelength region and oxidizing agent + long wavelength ultraviolet light (UV-A, B) ) + OH radical generation reaction by photocatalyst and continuous irradiation method Instead of UV lamp filled with mercury gas, discharge lamp filled with xenon or xenon gas in the form of pulp is used to output instantaneous continuous UV lamp. It can be up to millions of times compared to the increase in the water permeability of ultraviolet rays, as well as the use of long-wave ultraviolet rays, which have not been used previously, can dramatically increase the area of high oxidation reaction, so that it can be applied to water purification plants with a diameter of 2,000mm. Throughput and increase are possible to a degree.

In addition, it is possible to control the cycle of turning on and off the high power ultraviolet ray to ㎲ ~ s, and it is possible to control the cycle and the intensity of ultraviolet rays for how many times the ultraviolet rays are irradiated while passing through the ultraviolet lamp installed inside the tubular reactor. And OH radicals can be maximized by increasing the use efficiency of oxidants, enabling large-capacity water treatment, and the life span of pulsed UV lamps is inversely proportional to the lighting time. can do.

In the present invention, when the oxidant generates OH radicals and reacts with contaminants in the area irradiated with ultraviolet rays, new oxidants and contaminants move and the ultraviolet rays can react in the irradiation area. Determining how many times the polluted water is irradiated during the passage of the polluted water, there is no problem even if the decomposition reaction proceeds. On the contrary, the life and power consumption of the UV lamp can be reduced. There is an advantage that can increase the reaction zone by increasing the permeability in water.

For example, in the case of tubular advanced oxidation reactors, if the UV lamp is lit five times per second while the contaminated water flows through the area irradiated by the pulsed UV lamp, the inside of the tubular reactor performs OH radical generation reaction five times per second to generate pollutants. Can be disassembled.

In the present invention, by using a pulsed ultraviolet lamp that can be irradiated with ultraviolet radiation of the full-wavelength field at any time, and can be irradiated with a high output of instantaneous light while generating a small amount of heat compared to a medium-pressure mercury lamp having similar ultraviolet wavelength characteristics Advanced oxidation reaction by short wavelength ultraviolet (UV-C) + ozone + photocatalyst with weak permeability in water and advanced oxidation reaction by long wavelength ultraviolet (UV-A, B) + ozone + photocatalyst It is possible to increase the power consumption by applying the lighting time of the UV lamp in the form of a pulse that turns on / off periodically, not continuously, and it can be manufactured with fewer UV lamps than the existing advanced oxidation reactor. It can reduce the scale of advanced oxidation process water treatment device, and it is easy to maintain and install. There is a characteristic to save the dragon.

In the present invention, when the ozone generated in the ozone generator is dissolved together with the contaminated water and introduced into the advanced oxidation reactor 50, the OH radical generation reaction by a sufficient amount of ultraviolet rays and the OH radical generation reaction by the photocatalytic reaction proceed simultaneously. Therefore, since the decomposition rate of pollutants is increased, and the pressure of the advanced oxidation reaction apparatus 50 is increased, the amount of ozone dissolved in water can be greatly increased, and the amount of OH radicals generated by increasing the amount of ultraviolet rays can also be increased. A large amount of contaminants can also be treated, and the advanced oxidation reaction apparatus 50 can be used in parallel or in series, so that a large-scale advanced oxidation process water treatment system can be manufactured.

According to the present invention, an increase in the treatment rate of pollutants due to an increase in the amount of OH radicals generated by the advanced oxidation reactor 50 reduces the capacity of an expensive ozone generator, reduces the installation cost and operation cost of the pollutant treatment device, and treats the polluted water. The system can be compact, so that it is difficult to secure a place for expansion of polluted water treatment facilities, such as urban buildings, factories, apartments, and public facilities, or the water treatment system in places where existing biological treatment methods cannot be used due to odors and aesthetic problems. In addition, it is possible to effectively treat contaminated water such as water purification plant, golf course, landfill leachate, etc., where the inflow of hardly decomposable substances such as detergents, pesticides, and toxic substances increases due to environmental pollution and improved living standards.

In the present invention, the coil spring-shaped photocatalyst carrier 40 coated with the photocatalyst filled in the advanced oxidation reactor 50 has a diameter of the wire 51 of 0.1 to 5 mm, and the material is made of metal such as stainless steel, titanium, aluminum, or the like. It is made of a material, the diameter of the coil spring carrier 40 is 5 ~ 70mm, the shape of the coil spring is elongated, the pitch of the coil spring is smaller than the diameter of the wire 41, the start point and the end of the spring By processing the pitch close to the adjacent pitch, it is characterized in that the coil spring carrier 40 can increase the packing density so as not to overlap each other when filling the high-pressure advanced oxidation reactor (50). In addition, the photocatalyst carrier is subjected to sanding of the wire surface 43 with gold steel or the like, or to corrode with a chemical such as acid to roughen the wire surface 43 to coat the titanium alkoxide by diluting it in a solvent to a temperature of 800 ° C. or less. The photocatalyst 42 may be firmly attached to the wire surface 43 by heat treatment to improve the adhesion of the photocatalyst 42 and increase the surface area of the coated photocatalyst.

The coil spring-shaped photocatalyst carrier 40 having the photocatalyst formed on its surface is a space between the wire spring 41 and the wire 41 of the coil spring, that is, a space between the pitch and the coil spring carrier 40. Ultraviolet ray irradiation facilitates contaminant water to pass through, reducing pressure loss, and significantly larger surface area and pressure loss than the case of coating photocatalyst on porous plate. There is an advantage that the efficiency is high, and the processing capacity can be increased.

In addition, when the coil spring-shaped photocatalyst carrier 40 is charged into the advanced oxidation reaction apparatus 50, the coil spring is compressed and filled by using the elasticity of the photocatalyst carrier 40 to thereby coil the coil spring by tension of the coil spring. The photocatalyst carriers 40 are firmly fixed to each other to be fixed so as not to move in the flow of water, thereby solving the problem of breakage of the quartz tube 54.

In this regard, when the ultraviolet lamp 55 used in the advanced oxidation reaction device 50 uses a pulsed ultraviolet lamp 55 that emits light in various wavelength ranges from the ultraviolet to the visible ray region, the quartz tube 54 is close. At this point, the reaction to generate OH radicals by photocatalytic reaction by UV-C (254 nm) wavelength band and the coil spring carrier 40 located relatively far from the quartz tube 54 is longer than UV-C. It can be used to decompose pollutants by generating OH radicals by decomposing ozone by high oxidation reaction by UV-A and B (280 ~ 400nm) wavelength ultraviolet rays which can reach relatively far with relatively good penetration.

The present invention is a water treatment apparatus using an ozone or hydrogen peroxide as an oxidizing agent, using an ultraviolet lamp 40 for irradiating a xenon or xenon discharge lamp in the form of a pulse of high power and an advanced oxidation reaction technique using a photocatalyst. It is supplied at a desired pressure to the advanced oxidation reactor by the pressure pump 20 through the treatment water supply pipe connected to the treatment water storage tank 10 storing the treatment water (contaminated water), and the front end or the rear end of the pressure pump 20 When the ozone produced by the ozone generator is supplied through the ozone supply line, the reactant in which ozone is dissolved in the contaminated water is supplied to the advanced oxidation reactor (50), and when the hydrogen peroxide water is introduced into the oxidant, the pressure pump (20). It can be input by metering pump to the front part.

The advanced oxidation reactor 50 has an inlet 52 and an outlet 53 in a tubular housing 51 having a circular or rectangular cross section, and an ultraviolet lamp 55 in the interior space of the advanced oxidation reactor 50. The coil spring carrier 40 is filled with the center, but it is preferable to insert the ultraviolet lamp 55 into the quartz tube for smooth replacement of the ultraviolet lamp 55.

In the case of using the quartz tube 54 into which the ultraviolet lamp 55 is inserted into the advanced oxidation reaction device 50, the high power ultraviolet lamp 55 is disposed on the side of the quartz tube 54 so as to be smoothly cooled in the water during use. It is preferable to drill one or more holes so that the water can freely flow in and out so that the UV lamp 55 can be cooled directly with water.

The power line supplied to the UV lamp 55 is coated with a resin having excellent insulation, and maintains airtightness by using an O-ring of a fluorine resin system that is not aged by irradiation of ultraviolet rays on the side or upper portion of the advanced oxidation reactor 50. So that it is connected to an external pulse generator.

When one or more ultraviolet lamps 55 are installed in the advanced oxidation reaction device 50, the ultraviolet rays 55 are disposed in the advanced oxidation reaction device 50 so as to maintain an evenly spaced interval as much as possible. It is preferable to make this equal.

Coil spring-shaped photocatalyst carrier 40 filled in the interior space of the advanced oxidation reaction device 50 is a coil spring form space between the pitch can be easily passed through the irradiation of ultraviolet radiation and water containing contaminants pressure loss In addition, when the coil spring carrier 40 is compressed and filled with the coil spring carrier 40 in the advanced oxidation reactor 50, it is firmly secured by the spring tension of the charged coil spring carrier 40. It is to be formed in the form of an elastic metal coil-like spring that can prevent the risk of damaging the quartz tube 54 by the flow of the coil spring carrier 40 filled by the flow resistance of the water has a fixed effect desirable.

Further, according to the present invention, the coil spring-shaped photocatalyst carrier 40 has a wire 41 diameter of 1 to 10 mm, a coil spring diameter of 10 to 70 mm, and a pitch that is greater than that of the wire 41 used for processing. When the coil spring is charged into the advanced oxidation reactor 50, the coil springs are inserted into each other so as not to drop the filling rate, and the diameter of the wires can be adjusted according to the size and elastic force of the spring to prevent the coil springs from being fitted together. Will be.

The photocatalyst carrier 40 filled in the space between the quartz tube 54 and the advanced oxidation reactor housing 51 having the ultraviolet lamp 54 inside the advanced oxidation reactor 50 is empty and has a spring pitch. It is an egg-shaped coil spring shape that can be irradiated with ultraviolet radiation and reactants flow into the space without pressure loss, and the coil spring carrier 40 is compressed by using the coil spring tension when the interior of the advanced oxidation reactor 50 is charged It is fixed without being shaken by the blur of the fluid, and can prevent the breakage of the quartz tube 54 due to the collision between the coil spring carrier 40.

According to the present invention, the coil spring-shaped photocatalyst carrier 40 can be evenly charged in the three-dimensional oxidation reactor 50, the pressure loss is small while increasing the packing density to increase the number of coil spring carrier 40 The surface area of the wire is increased and the outer surface 43 of the coil spring surface is roughened by chemicals such as sanding or acid, followed by heat treatment after coating titanium alkoxides, which are photocatalyst precursors, to heat the photocatalyst to the wire outer surface 43. In this case, the adhesion between the outer surface 43 and the photocatalyst 42 and the surface area increased by the rough outer surface 43 increase the contaminants in the dissolved ozone and contaminated water and the frequency of oxidation reaction. By providing the opportunity to increase the oxidative decomposition reaction efficiency it is possible to increase the efficiency of contaminated water decomposition reaction.

The coil spring-shaped photocatalyst carrier 40 may be used by coating a photocatalyst having titanium dioxide as a main component, but when other corrosive fluids such as salts are contained, the coil spring carrier 40 may be easily corroded. Instead of coating and using the coil spring carrier 40 on the surface, titanium wire 41 is processed into a coil spring carrier 40 to roughen the surface by sanding and acid treatment to oxidize to a temperature of 800 ° C. or less. To form a titanium dioxide photocatalyst 42 on the outer surface 43 of the coil spring support 40.

The ultraviolet lamp 55 is electrically connected to the power supply 100 for supplying electricity, and has means for confirming the operating state of the ultraviolet lamp 55 from the outside, and varies the ultraviolet light according to the contaminated water treatment flow rate. It is preferable that the lighting time of the lamp can be operated in a pulse form from 1 time / second to 1 time / s, and the ultraviolet output can be adjusted from W to MW.

According to the present invention, when ozone is used as the oxidant, when the advanced oxidation reaction apparatus 50 is pressurized to 1 to 20 atm by a pressurized pump, a large amount of ozone in a gaseous state is dissolved and the amount of ozone dissolved in the contaminated water is increased. Increasing the amount of ultraviolet rays in the full-wavelength region by irradiating the inside of the advanced oxidation reaction device 50 with sufficient power for the high-oxidation reaction effectively, the OH radical generation reaction by the direct reaction of short-wavelength ultraviolet rays, and the previously transmitted underwater power This excellent long-wavelength UV and OH radical generation reaction by photocatalyst proceeds simultaneously, and double-pulse type UV radiation increases by tens of thousands of times than the output of existing mercury UV lamps. As the area is dramatically increased, large-capacity water treatment devices as well as high concentrations Characterized in that salt it can also provide an advanced oxidation process water treatment device capable of processing.

In addition, the interval of lighting of the UV lamp can be arbitrarily adjusted to the unit of ㎲, thereby minimizing the lighting time, thereby lowering the power consumption and minimizing the lighting time due to the life characteristics of the UV lamp which is inversely proportional to the lighting time, thereby extending the life of the UV lamp. In the existing advanced oxidation reaction apparatus using short wavelength ultraviolet rays with low water permeability, the use of energy and oxidant is minimized by minimizing the oxidation zone and minimizing oxidizing agents such as ozone and hydrogen peroxide emitted in unreacted state. It provides a high oxidation oxidation process water treatment device that can dramatically reduce the size, installation cost and operation cost of the advanced oxidation process pollutant treatment device.

10: contaminated water reservoir
20: pressurized pump
30: ozone pressurized pump
40: coil spring carrier 40
41: stainless steel or titanium wire
42: photocatalyst
43: coil spring carrier 40 surface
50: advanced oxidation reactor
70: treated water reservoir
100: UV lamp pulse generator

Claims (4)

A tubular housing having an inlet and an outlet through which treated water flows in and out, a quartz tube inserted into the housing, an ultraviolet lamp inserted into the quartz tube to emit ultraviolet rays, and an ultraviolet ray driving the ultraviolet lamp. And a photocatalyst carrier filled with a lamp power system and a titanium dioxide-based photocatalyst exposed to the surface and filled in the space between the quartz tube and the housing, and oxidatively decomposes pollutants by OH radicals produced using an oxidant. In the advanced oxidation process water treatment apparatus using an advanced oxidation reaction,
The ultraviolet lamp is filled with xenon lamp or xenon gas to emit ultraviolet light of the entire wavelength range,
The ultraviolet lamp power system drives the ultraviolet lamp in the form of a pulse,
The quartz tube is a highly oxidized process water treatment apparatus, characterized in that a hole for circulating the treated water flows into and out of the quartz tube so that the ultraviolet lamp is in direct contact with the treated water. The method of claim 1,
In the case of using ozone as an oxidizing agent, ozone pressurizes the reaction pressure to a pressure of 1 to 20 atm to increase the amount of dissolved ozone in the treated water, thereby reacting. The method of claim 1,
The photocatalyst carrier is used to produce a titanium dioxide layer on the outer surface of the coil spring by processing a titanium wire in an elastic coil spring shape to roughen the outer surface and then oxidized to a temperature below 800 ℃. Advanced oxidation process water treatment apparatus. The method of claim 1,
The photocatalyst carrier is prepared by processing a stainless steel wire into an elastic coil spring shape to roughen the outer surface, and then coating titanium alkoxide on the outer surface of the coil spring to heat-treat it at a temperature of 800 ° C. or lower. Advanced oxidation process water treatment apparatus, characterized in that.

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