KR20130021071A - In-line ultraviolet reactor for water and wastewater treatment using ultrasonic energy - Google Patents

Abstract

PURPOSE: An in-line ultraviolet reactor using ultrasound is provided to enhance the efficiency of water treatment by using the first module and the second module for reacting, increase a removal rate and sterilization rate to almost 100% by using ultrasound along with ozone and be economically reasonable by increasing the use of ozone by 50%. CONSTITUTION: An apparatus for water treatment(200) comprises a pipe(210) for reacting process, a first module for reacting and a second module for reacting(240). A channel for water passing through is in the pipe. The first module for reacting treats water which passes through in the pipe. The second module for reacting comprises a device for generating ultrasound which is connected to the pipe so that the ultrasound goes to the water in the pipe. The second module for reacting disinfects water by generating ultrasound in the water. The first module for reacting which is inserted to the center of the pipe plays an role as an injection nozzle(220) which provides ozone or hydrogen peroxide.

Description

In-line ultraviolet reactor for water and wastewater treatment using ultrasonic energy}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disinfection apparatus used in a water treatment apparatus for treating water, sewage, wastewater, and the like, and more particularly, to an ultraviolet reactor that serves to remove and disinfect hardly decomposable substances using ultrasonic waves.

As a water treatment technology, a water treatment process combining a membrane and various treatment processes is widely used in an advanced treatment technique for removing various toxic contaminants. In particular, water treatment processes combining these membranes and various treatments are used in combination with chemical treatments, biological treatments or physical treatments. In particular, the application of membranes and various processes for water purification, hardly degradable industrial wastewater treatment, livestock wastewater treatment, secondary treatment of landfill leachate and contaminated groundwater treatment is expanding.

As described above, after the water treatment using the membrane is completed, the final sterilization as well as the additional advanced treatment process is performed prior to discharge of the treated water. In other words, the water after the water treatment is moved along the pipeline, and individual methods such as irradiating ultraviolet rays, injecting ozone or hydrogen peroxide, etc. are used for disinfection or advanced treatment.

However, the conventional method has a problem that hardly decomposable substances such as environmental hormones remaining in the water are not easily removed in the water treatment process. In other words, the removal rate of the hardly decomposable substance is lowered by using only an ultraviolet lamp or hydrogen peroxide, and the removal rate of the hardly decomposable substance is relatively increased by using ozone, but the use of ozone is not economical and requires attention in handling. There was this.

Therefore, before the end of the water treatment and finally discharged, it is required to develop a relatively economical ultraviolet reactor capable of disinfecting and removing hardly decomposable substances such as environmental hormones present in the water.

The present invention is to solve the above problems, by removing the hardly decomposable substances contained in the water to perform the desired level of purification treatment and at the same time to disinfect, sterilize pathogenic microorganisms and bacteria during discharge, purification treatment It is an object of the present invention to provide a reactor for water treatment using ultrasonic waves to ensure economic feasibility.

Reactor for water treatment using the ultrasonic wave according to the present invention for achieving the above object is to perform the advanced treatment of the disinfection and hardly decomposable material prior to releasing the water of the purification process is completed, water can be introduced A hollow reaction tube formed with an inlet and an outlet which can be discharged, a first reaction module for disinfecting water flowing along the reaction tube, and emitting ultrasonic waves toward the water flowing along the reaction tube. And a second reaction module including an ultrasonic projectile coupled to the reaction tube.

In the reactor for water treatment using ultrasonic waves according to the present invention, when the first reaction module and the second reaction module are used together, the water treatment effect according to the reaction is doubled. The use of hydrogen peroxide or ultraviolet light alone is not able to completely remove the hardly decomposable substance, but the use of ozone with ultrasound improves the removal rate and sterilization rate of the hardly degradable contaminants to almost 100%.

In addition, the use of ozone alone causes excessive cost, but when ultrasonic and ozone are used together, the ozone consumption can be reduced to about 50% while maintaining the removal rate of sterilization and sterilization rate completely. have.

1 is a schematic perspective view of a reactor for water treatment using ultrasonic waves using ultrasonic waves according to an embodiment of the present invention.
FIG. 2 is an enlarged perspective view of the second reaction module of the reactor for water treatment using the ultrasonic wave illustrated in FIG. 1.
3 is a sectional view taken along the line III-III in Fig.

Hereinafter, with reference to the accompanying drawings, it will be described in more detail with respect to the reactor for water treatment using ultrasonic waves according to an embodiment of the present invention.

1 is a schematic perspective view of a reactor for water treatment using ultrasonic waves using ultrasonic waves according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of a second reaction module of a reactor for water treatment using ultrasonic waves shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2.

The reactor for water treatment using ultrasonic waves according to the present invention is disposed at the rear end of a purification system (not shown) in which the main step of the purification treatment is performed, and finally the advanced treatment and disinfection of the hardly decomposable substance is discharged before the purified water is discharged. It is to.

1 to 3, the reactor 200 for water treatment using ultrasonic waves according to an embodiment of the present invention may include a reaction tube 210, a first reaction module 220, 230, and a second reaction module 240. Equipped.

The reaction tube 210 is to discharge the water discharged from the purification system after performing the advanced treatment and disinfection treatment of the hardly decomposable substance. Reaction treatment tube 210 is a hollow tube in one side is formed with an inlet (i) is introduced into the water discharged from the purification system, the other side is the outlet for discharging the water after the high-temperature treatment and disinfection of the hardly decomposable material ( o) is formed.

The reaction tube 210 may be integrally formed in its entirety, but is generally made by combining several tubes as in the present embodiment. Flange parts are formed at both ends of each pipe, and the flange part of each pipe is piped using bolts and nuts.

The first reaction module and the second reaction module are for disinfecting and sterilizing water flowing along the inner conduit of the reaction treatment tube 210 and for removing hardly decomposable substances present in the water.

The first reaction module is for supplying sterilization such as ozone or hydrogen peroxide to the water flowing along the reaction tube 210, reactants, or by removing ultraviolet rays to remove bacteria, hardly decomposable substances, etc. contained in the water. .

In the present embodiment, the first reaction module includes a reagent injection tube 220 and an ultraviolet irradiation tube 230.

The reactant injection tube 220 and the ultraviolet irradiation tube 230 are both manufactured in the form of a tube and piped to the reaction tube 210. That is, it is inserted in the middle of the reaction tube 210 is connected long, it is configured to flow the water to the internal pipeline.

In the present embodiment, the reactant injection pipe 220 is connected to a supply pipe (not shown) for supplying ozone or hydrogen peroxide, and supplies reactants such as ozone or hydrogen peroxide to the water flowing in the pipeline.

Similarly, in the ultraviolet irradiation tube 230, a plurality of ultraviolet lamps are installed inside the pipeline, and the ultraviolet ray is irradiated to the water flowing through the pipeline to perform decomposition and disinfection of the hardly decomposable substance.

The second reaction module is to remove the hardly decomposable substance in the water by performing ultrasonic wave toward the water flowing along the reaction tube 210 and to perform sterilization and disinfection treatment.

In the present embodiment, the second reaction module 240 includes a tube body 241 and an ultrasonic emitter 245. The tube body 241 is inserted into the reaction treatment tube 210 in a tubular shape similar to the reagent injection tube 220, and is configured such that water flows along the inner pipe.

Flange portions 242 are formed at both ends of the tube body 241, and are coupled to the flange portions formed in the reaction tube 210, the reagent injection tube 220, and the ultraviolet ray irradiation tube 230 by bolts 243.

In the present embodiment, the second reaction module 240 is disposed one each on both sides of the reagent injection tube 220 and one each on both sides of the ultraviolet irradiation tube 230, and a total of four second reaction modules 240 are disposed. Of course, the number and order of arrangement may vary depending on the water to be treated and the type of material to be treated.

In the present embodiment, the reactant injection tube 220 is pre-arranged and the UV irradiation tube 230 is post-arranged along the flow direction of the water, respectively, on both sides of the reactant injection tube 220 and the ultraviolet irradiation tube 230. 240 is arranged.

An insertion hole 246 penetrating between an inner surface and an outer surface is formed in the tube body 241 of the second reaction module, and the insertion hole 246 is fitted with an ultrasonic launcher 245 (an ultrasonic vibrator). In particular, in the present embodiment, the insertion holes 246 are arranged at an angular interval along the circumferential direction of the tube body 241, as shown in Figure 3, together in four directions with respect to the water flowing through the tube body 241 Ultrasound can be irradiated.

In addition, each ultrasonic projectile may be connected to a controller (not shown) to determine the order and frequency of ultrasonic launch.

The ultrasonic launcher 245 emits ultrasonic waves toward water to remove hardly decomposable substances such as environmental hormones, and disinfects and sterilizes water using cavitation and relaxation.

Sterilization and disinfection using ultrasonic waves will be described.

Ultrasound is a frequency with a frequency of 16 Hz or more, which is the limit of human hearing. For convenience, the frequency is based on 30 kHz, and the frequency is divided every 10 times. Such ultrasonic waves are used in various fields of science such as chemistry, semiconductor manufacturing, materials engineering, and environmental engineering.

In particular, the ultra-high or long wave is used for physical cleaning, and the frequency range used to induce fine cleaning, chemical reaction or various reactions in water is 30 (or 20) to 1,000 kHz. Also called sonochemical effect.

When ultrasonic waves are delivered in a uniform liquid medium, the molecules oscillate at their average position. The vibrations of molecules cause repeated compression cycles with decreasing distances and expansion cycles with increasing distances, and the criticality at which the distance between liquid molecules can maintain a liquid state when a sufficiently low pressure is reached in the expansion cycle. If the molecular distance is greater than this, the liquid is destroyed to form a cavity.

This is called the cavitation bubble, and as the cavity created during the expansion cycle moves through the medium, the rate of diffusion from the bulk solution to the cavity during the expansion cycle is greater than the rate of diffusion from the cavity to the solution during the compression cycle. Because the cavity is slightly larger than the rate of contraction in the expansion cycle, rather than the rate of compression during the compression cycle, the cavity continues to grow until it reaches a limit and then breaks down when the intensity of the ultrasound exceeds the acoustic cavitational threshold. .

This three-step phenomenon of nucleation, bubble growth, and expansion and destruction is called cavitation. The heat of condensation is generated when the cavity is destroyed or compressed, and since the cavitation occurs for a very short moment, the heat is not enough time to transfer to the surroundings, so the part becomes adiabatic. The temperature of the part adjacent to the cavity momentarily rises, creating hot-spots and reaching temperatures of several thousand degrees K. Due to this effect, hardly degradable substances such as hormones present in water are decomposed and removed, and bactericidal and disinfecting effects occur.

In addition, energy shock that destroys molecular bonds caused by shrinkage, expansion, and thermal shock occurs continuously and repeatedly, which causes energy amplification through a kind of resonance. At this time, the energy level delivered to the medium is exponentially attenuated so that the size, frequency of use, and repetition period of the firing energy can be adjusted in consideration of this point to optimize the range of use and the properties of the fluid.

This energy firing and delivery is repeated depending on the flow rate of the fluid, that is, in order to make the energy residence time longer, so that a resonance oscillator can be placed or a vibrator for the confirmation of resonance energy can be generated in the tube where the cavity is generated. It is also possible to apply a controller to which the modulation technique is applied so that the reception is alternately performed to maximize the overall sound field energy.

As described above, in the present invention, the first reaction module (220,230) using the reactant or ultraviolet light and the second reaction module 240 to perform disinfection using the ultrasonic wave together in the water flowing through the reaction treatment tube (210) The final treatment.

As in the present invention, when the first reaction module and the second reaction module are used together, the reaction effect is doubled. That is, when only hydrogen peroxide or ultraviolet light is used, the hardly decomposable substance cannot be completely removed, but when ozone is used together with ultrasonic waves, the removal rate and sterilization rate of the hardly decomposable contaminants are improved to almost 100%.

In addition, there is an economic problem when using only ozone, but when using the ultrasonic and ozone together, the ozone consumption can be reduced to about 50% while maintaining the removal rate and sterilization rate of hardly degradable pollutants.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

200 ... reactor for water treatment using ultrasonic wave 210 ... reaction tube
220 ... reactant injection tube 230 ... UV irradiation tube
240 ... Second Reaction Module ...
245 ... Ultrasonic Launchers

Claims (7)

As a disinfection prior to discharge of the water of the present purification process is completed, a hollow reaction tube formed with an inlet through which water can be introduced and an outlet through which it can be discharged;
A first reaction module for treating water flowing along the reaction tube; And
And a second reaction module comprising an ultrasonic projectile coupled to the reaction treatment tube to emit ultrasonic waves toward the water flowing along the reaction tube. The method of claim 1,
The second reaction module is a reactor for water treatment using ultrasonic waves, characterized in that to disinfect water by generating a cavitation (cavitation) in the water by firing ultrasonic waves. The method according to claim 1 or 2,
The second reaction module,
A tube body having flange portions formed at both sides thereof, the tube body being connected to the reaction tube, and having a plurality of insertion holes penetrating between an inner surface and an outer surface;
A reactor for water treatment using ultrasonic waves, characterized in that it comprises a plurality of ultrasonic projectiles coupled to the insertion hole of the tube body for emitting ultrasonic waves toward the water. The method of claim 3,
The ultrasonic projectile is a reactor for water treatment using ultrasonic waves, characterized in that arranged at a predetermined angular interval along the circumferential direction of the tube body. The method of claim 1,
The first reaction module is a reactor for water treatment using ultrasonic waves, characterized in that the tube is piped in the middle of the reaction treatment tube to supply ozone or hydrogen peroxide to the water flowing along the reaction treatment tube. The method of claim 1,
The first reaction module is a pipe joint in the middle of the reaction tube, the ultraviolet lamp is installed inside the reactor for water treatment using ultrasonic waves, characterized in that the ultraviolet irradiation tube for irradiating ultraviolet light to the water flowing along the reaction tube. . The method of claim 1,
At least two first reaction modules are installed in the reaction tube,
The second reaction module is a reactor for water treatment using ultrasonic waves, characterized in that installed on both sides of the first reaction module.

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