KR20190126499A - Apparatus for preventing loss of micro-adsorbents - Google Patents

Abstract

The present invention relates to a microadsorbent loss prevention device which is able to prevent loss by including microadsorbent in treated water when discharging the treated water of a reactor by irradiating ultrasound to the reactor, in which microadsorbent flows, and suppressing the movement of the microadsorbent to the top of the reactor through acoustic radiation force and cavitation phenomenon of ultrasonic waves. According to the present invention, the microadsorbent loss prevention device comprises: a water treatment reactor which has raw water and microadsorbent flowing in the raw water; and an ultrasonic irradiation device which is provided at an upper end of the water treatment reactor and irradiates ultrasonic waves to raw water. The present invention generates a cavitation phenomenon induced by ultrasonic waves while acoustic radiation power of ultrasonic waves is generated in raw water by ultrasonic irradiation, and is able to prevent microadsorbent from flowing upwards through the acoustic radiation force and cavitation phenomenon of ultrasonic waves.

Description

Apparatus for preventing loss of micro-adsorbents}

The present invention relates to a device for preventing the loss of a microadsorbent, and more particularly, by irradiating ultrasonic waves to a reaction tank in which the microadsorbent is flowed, the microadsorbent is applied to the reaction tank through acoustic radiation force and cavitation of ultrasonic waves. The present invention relates to a device for preventing the loss of microadsorbent, which can prevent the microadsorbent from being lost in the treated water when the treated water is discharged from the reaction tank.

Due to the development of industrial society, heavy metals, various organic pollutants and inorganic pollutants are increasing in river water, lake water and ground water. As a result, the production of high quality drinking water has become more difficult, and the available water resources have decreased, greatly increasing the need for reuse of sewage treatment water.

In particular, trace toxic substances increase in river water, lake water, ground water and sewage treatment effluent, which poses a great threat to the production of high quality drinking water and reuse of water. Trace toxicants are highly toxic at low concentrations and must be removed in water purification and water reuse processes.

Recently, attention has been paid to adsorbents such as metal oxide nanoparticles to remove trace toxic substances. Finely sized adsorbents are used as heterogeneous catalysts or heavy metal adsorbents for oxidation / reduction of organic pollutants.

Adsorbents having a fine size, such as nanoparticles, have a large specific surface area, rich reactive sites and adsorption sites on the surface, and have very high organic matter oxidation removal performance and heavy metal adsorption removal performance. Since the specific surface area is high and the pollutant removal efficiency is high, when the same amount of pollutant is removed, the amount of injection is reduced compared to the large sized particles, which can be economically applied.

However, the adsorbent having a fine size is less than 100 nm in size and is hardly separated by precipitation, filtration and the like. That is, when the fine adsorbent is injected into the reactor for water treatment, there is a problem that can flow into the water system along with the treated water after the pollutant treatment and cause contamination to rivers, lakes and ground water.

(Patent Document 1) Korean Registered Patent No. 1386599

The present invention has been made to solve the above problems, by irradiating the ultrasonic wave to the reaction tank in which the microadsorbent flows through the acoustic radiation force of the ultrasonic wave (cavitation) and the cavitation of the microadsorbent (top) of the reaction tank It is an object of the present invention to provide a microadsorbent loss prevention device that can prevent the microadsorbent from being lost in the treated water when the treated water is discharged from the reaction tank.

Device for preventing the loss of microadsorbent according to the present invention for achieving the above object is a water treatment reactor having a raw water, and a microadsorbent flowing in the raw water; And an ultrasonic irradiator provided at an upper end of the water treatment reactor to irradiate ultrasonic waves to the raw water. Cavitation phenomenon induced by ultrasonic waves is generated along with the acoustic radiation power of ultrasonic waves in the raw water by ultrasonic irradiation. And, it is characterized in that it is possible to suppress the flow of the microadsorbent through the ultrasonic radiation power and cavitation phenomenon.

A microadsorbent convection induction plate is provided between the ultrasonic irradiator and the ultrasonic irradiator on an upper side of the water treatment reactor, and the microadsorbent convection induction plate moves the microadsorbent floating above the water treatment reactor to a region where the ultrasonic intensity is relatively large. Induce.

A plurality of ultrasonic irradiation apparatuses are spaced apart from each other at the upper end of the water treatment reactor, and the inner wall region of the water treatment reactor between the ultrasonic irradiation apparatus and the ultrasonic irradiation apparatus has a smaller ultrasonic strength than the central portion of the water treatment reactor, and rises to the upper portion of the water treatment reactor. The microadsorbent may collide with the microadsorbent convection induction plate to be moved to a region where the ultrasonic intensity is relatively large and settle to the bottom of the water treatment reactor.

One side of the water treatment reactor may be further provided with a temperature control device for controlling the temperature of the raw water to 30 ℃ or less.

The greater the strength of the cavitation, the greater the physical force applied to the microadsorbent, and by adjusting the cavitation strength, the vertical position of the microadsorbent can be adjusted, and the strength of the cavitation is inversely proportional to the ultrasonic frequency and the air bubbles dissolved in the raw water. Proportional to surface tension.

Ultrasonic waves irradiated to the raw water through the ultrasonic irradiation device may have a frequency of 20 to 40 kHz or a frequency of 100 to 130 kHz.

Device for preventing the loss of microadsorbent according to the present invention has the following effects.

Through the ultrasonic radiation and cavitation phenomenon of the ultrasonic wave can be suppressed to move to the upper portion of the water treatment reactor when the discharged treated water, it is possible to prevent the microadsorbent is included in the treated water to be lost.

1 is a block diagram of a device for preventing the loss of microadsorbent according to an embodiment of the present invention.
Figure 2 is a plan view of the microadsorbent loss prevention device according to an embodiment of the present invention.

The present invention provides a technique capable of preventing the microadsorbent in the reaction tank from being included in the treated water when the treated water is discharged in the reaction treatment tank using the microadsorbent.

To this end, it utilizes the cavitation induced by the acoustic radiation force and ultrasonic irradiation of the ultrasonic wave itself, and suppresses the movement of the microadsorbent to the upper part of the reactor through the acoustic radiation force and cavitation phenomenon of the ultrasonic wave. It can be made, it is possible to prevent the leakage of the microadsorbent during the discharge of the treated water.

The acoustic radiation force of the ultrasonic wave itself refers to the physical force of the ultrasonic wave applied to the medium. Cavitation induced by ultrasonic irradiation refers to a shock wave phenomenon generated when a cavity formed by ultrasonic irradiation collapses.

Hereinafter, a device for preventing the loss of a microadsorbent according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the apparatus for preventing the loss of microadsorbent according to an embodiment of the present invention includes a water treatment reactor 110. The water treatment reactor 110 is provided with a microadsorbent 10 for adsorbing contaminants contained in raw water. The microadsorbent 10 is not limited in size but may have a size of 100 nm or less. The microadsorbent 10 serves to adsorb contaminants contained in raw water while flowing in the water treatment reactor 110. The water treatment reactor 110 may be formed in a cylindrical, cuboid shape.

The upper end of the water treatment reactor 110 is provided with an ultrasonic irradiation device 120 for irradiating ultrasonic waves to the internal space of the water treatment reactor 110. When the raw water and the microadsorbent 10 are provided in the water treatment reactor 110, when ultrasonic waves are irradiated to the raw water through the ultrasonic irradiation device 120, the ultrasonic water is induced by the acoustic radiation force and the ultrasonic irradiation. By the cavitation (cavitation) to be made it can be suppressed that the microadsorbent 10 flows to the upper portion of the water treatment reactor (110). That is, the microadsorbent 10 may be inhibited from being moved to the upper portion of the water treatment reactor 110 through two physical forces induced by ultrasonic waves, an acoustic radiation force and a cavitation phenomenon.

If the microadsorbent 10 is suppressed from moving to the upper portion of the water treatment reactor 110 by the acoustic radiation force and cavitation phenomenon induced by the ultrasonic wave, the microadsorbent is discharged when the treated water is discharged through the upper portion of the water treatment reactor 110. (10) can be prevented from being lost by being included in the treated water.

The principle of controlling the flow of the microadsorbent 10 by the acoustic radiation force and the cavitation phenomenon of the ultrasonic wave is as follows.

The flow of the microadsorbent 10 is controlled by the acoustic force of the ultrasonic wave and the physical force generated by the cavitation phenomenon. The acoustic radiation force is the physical force of the ultrasonic wave itself according to the ultrasonic irradiation. Cavitation is a shock wave generated when the cavity collapses, and the physical force induced by the shock wave is used to control the flow of the microadsorbent 10.

Specifically, when ultrasonic waves are irradiated in the water, cavities are generated by negative pressure. The cavity expands to a certain size, then collapses by positive pressure, and finally collapses. When the cavity collapses, shock waves of several hundred atmospheres are generated, and the shock wave shape generated when the cavity collapses is called a cavitation phenomenon, and the shock wave of several hundred atmospheres generated when the cavity collapses is a microadsorbent (10). Is used for flow control.

The greater the strength of the cavitation, that is, the physical force generated by the cavitation, the greater the physical force applied to the microadsorbent 10. Therefore, the physical force applied to the microadsorbent 10 may be controlled by adjusting the cavitation strength, and thus, the vertical position of the microadsorbent 10 in the water treatment reactor 110 may be controlled. .

The strength of the cavitation is inversely proportional to the ultrasonic frequency and the bubbles dissolved in the raw water, and has a property proportional to the surface tension of the raw water.

Ultrasound is a sound wave of 15 kHz or more, when irradiating a relatively low frequency of 20 to 40 kHz, the cavitation intensity is increased to deliver a strong pressure to the microadsorbent 10, and a relatively high frequency of 100 to 130 kHz When irradiating, it is easy to control the flow to the ultra-adsorbent 10, such as nano-size.

One or more ultrasonic irradiation apparatuses 120 provided at the upper end of the water treatment reactor 110 may be provided. Preferably, two or more ultrasonic irradiation apparatuses 120 may be provided. When two or more ultrasonic irradiation apparatuses 120 are provided, the ultrasonic radiation power of the ultrasonic waves may be doubled and ultrasonic waves may be uniformly irradiated onto the water treatment reactor 110. When the plurality of ultrasonic irradiation apparatuses 120 are provided, it is preferable to arrange the ultrasonic irradiation apparatuses 120 at regular intervals.

On the other hand, by disposing a plurality of ultrasonic irradiation device 120 can be uniformly irradiated with the ultrasonic wave to the water treatment reactor 110, there is no choice but to exist a region that is not irradiated with ultrasonic waves. For example, ultrasonic waves are not uniformly irradiated to the inner wall region of the water treatment reactor 110 between the ultrasonic irradiation device 120 and the ultrasonic irradiation device 120. As such, the microadsorbent 10 may be floated upward in a region where ultrasonic waves are not irradiated to the water treatment reactor 110 or a region where the intensity of ultrasonic waves is relatively small. The microadsorbent convection guide plate 130 may be provided on one side of the upper end of the water treatment reactor 110 in order to prevent the microadsorbent 10 from being injured in the region where the intensity of the ultrasonic wave is small. More specifically, the microadsorbent convection guide plate 130 may be provided between the ultrasonic irradiation device 120 and the ultrasonic irradiation device 120. As the microadsorbent convection induction plate 130 is provided, even if the microadsorbent 10 rises to the upper side, the microadhesion convection induction plate 130 collides with the microabsorber and is moved to a region having a large ultrasonic strength to settle below the water treatment reactor 110. Can be.

Previously, the strength of the cavitation was inversely proportional to the ultrasonic frequency and the bubbles dissolved in the raw water, and mentioned the property that is proportional to the surface tension of the raw water. The strength of the cavitation is also linked to the temperature of the raw water. When the temperature of the raw water rises, the strength of the cavitation is weakened, the raw water in the water treatment reactor 110 is preferably controlled to 30 ℃ or less, for this purpose, the temperature control device 140 on one side of the water treatment reactor 110 May be further provided.

10: microadsorbent
110: water treatment reactor 120: ultrasonic irradiation apparatus
130: microadsorbent convection guide plate 140: temperature controller

Claims (7)

A water treatment reactor having raw water and a microadsorbent flowing in the raw water; And
And an ultrasonic irradiation device provided at the upper end of the water treatment reactor to irradiate ultrasonic waves to raw water.
Ultrasonic radiation generates ultrasonic radiation in raw water and cavitation induced by ultrasonic waves, and it is possible to suppress the flow of the microadsorbent through the ultrasonic radiation and cavitation phenomenon. Characterized in that the microadsorbent loss prevention device.
According to claim 1, A microadsorbent convection guide plate is provided between the ultrasonic irradiation device and the ultrasonic irradiation device on one side of the upper end of the water treatment reactor,
The microadsorbent convection induction plate is a microadsorbent loss prevention device, characterized in that to induce the movement of the microadsorbent floated to the upper portion of the water treatment reactor to a region having a relatively high ultrasonic intensity.
According to claim 2, A plurality of ultrasonic irradiation apparatus is provided at the upper end of the water treatment reactor spaced apart,
The inner wall area of the water treatment reactor between the ultrasonic irradiator and the ultrasonic irradiator has a smaller ultrasonic intensity than the central portion of the water treatment reactor.
The microadsorbent which floats to the upper portion of the water treatment reactor is collided with the microadsorbent convection guide plate and moved to a region where the ultrasonic intensity is relatively large, so that the microadsorbent loss prevention apparatus may be settled to the lower portion of the water treatment reactor.
The apparatus of claim 1, further comprising a temperature controller for controlling the temperature of the raw water to 30 ° C. or less on one side of the water treatment reactor.
The method of claim 1, wherein the greater the strength of the cavitation, the greater the physical force applied to the microadsorbent, the vertical position of the microadsorbent can be adjusted by adjusting the cavitation strength,
The strength of the cavitation is inversely proportional to the ultrasonic frequency and the bubbles dissolved in the raw water, and the apparatus for preventing the loss of microadsorbent, characterized in that it is proportional to the surface tension of the raw water.
The apparatus of claim 1, wherein the ultrasonic wave irradiated to the raw water through the ultrasonic irradiation device has a frequency of 20 to 40 kHz.
The apparatus of claim 1, wherein the ultrasonic wave irradiated to the raw water through the ultrasonic irradiation device has a frequency of 100 to 130 kHz.

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