KR20190061999A - Gas liquid contact device for water treatment - Google Patents

Abstract

The present invention relates to a gas-liquid contact apparatus for water treatment. As a liquid passing through the inside of a body is injected at a high speed inside the body by a fluid flow guide member, a space for accommodating liquid and gas is formed inside the body. Since an electrode for plasma discharge is provided in the space for accommodating liquid and gas, it is possible to prevent the dielectric breakdown to maintain the stable plasma discharge state.

Description

[0001] The present invention relates to a gas liquid contact device for water treatment,

The present invention relates to a gas-liquid contact apparatus for water treatment, and more particularly, to a gas-liquid contact apparatus for water treatment capable of water-treating (purifying) polluted water flowing along a pipe by using a low-temperature plasma in a short period of time.

Recently, advanced oxidation process (AOP) has been actively studied as a method for overcoming the limitations of the conventional oxidation process.

Advanced oxidation method is an advanced water treatment technology that oxidizes organic matter which is polluted in water by using ozone, OH radical, hydrogen peroxide, UV etc. It has much stronger oxidizing power than conventional oxidizing agents chlorine, chlorine dioxide and potassium permanganate, In addition, it is gradually being applied to the treatment of water.

Advanced oxidation methods applied to water treatment have been developed variously, but most of them are applied in parallel with ozone, hydrogen peroxide, ozone, UV AOP, hydrogen peroxide and UV AOP.

Of these, ozone treatment utilizes the strong oxidizing power of ozone, and since it has excellent germicidal effect, it is used as a bactericide in a water treatment process such as killing most bacteria by a small amount of contact.

In addition, it is effective in removing odorous substances by changing properties of trace organic substances in raw water, and is widely used for oxidation treatment of artificial synthetic organic materials and the like.

However, ozone has a disadvantage in that it reacts very slowly with most organic substances or does not react with organic substances at all, and has a very selective reaction.

Therefore, in order to overcome the disadvantages of ozone treatment, OH radical is used in combination with ozone, hydrogen peroxide, ozone, UV AOP, hydrogen peroxide and UV AOP by using the oxidative power of OH radical. And a method of using it for oxidation treatment has been studied and applied to various fields.

One of the fields of advanced oxidation methods is investigating low-temperature plasma discharge in water. Pulse streamer discharge forming a low-temperature plasma generates a large amount of OH radicals by plasma. Hydrogen peroxide is generated by the interaction of OH radicals in water, Reaction.

The oxidation reaction of the active radicals (OH *, O *, and O3) generated by the plasma has an advantage that it can be widely applied to the purification of water such as decomposition of organic matter.

However, research on underwater discharge has a problem in that, when the electrode is immersed in water, electricity is charged to the discharge electrode in the medium, and electricity is generated by the water and the plasma is not generated.

Therefore, a new type of underwater plasma discharge method that can solve such a problem is required.

Korean Registered Patent No. 10-1639337 (published on July 14, 2014)

Accordingly, the present invention has been made in view of the above background, and it is an object of the present invention to provide a liquid flow guide member, An object of the present invention is to provide a gas-liquid contact apparatus for water treatment which can prevent a dielectric breakdown and maintain a stable plasma discharge state by providing an electrode for plasma discharge in a space in which a gas is accommodated.

In addition, since the plasma discharge state can be stably maintained in a space in which the liquid and the gas are accommodated, a large amount of active radicals can be directly secured and utilized, and water treatment efficiency can be enhanced. There is a purpose.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a fluid flow guide device comprising: a fluid flow guide member installed in a body to guide a flow of a fluid to form a space in which a liquid and a gas are accommodated; A pair of electrodes provided in a space in which liquid and gas are accommodated in the body; And a high voltage generator for applying a high voltage pulse or power to the pair of electrodes.

According to another aspect of the present invention, there is provided a fluid flow guide device comprising: a fluid flow passage in which a fluid is flowed from a side to which a liquid flows in order to eject liquid at a high speed; And a jet port for collectively jetting the liquid passing through the fluid transfer passage to form a space for accommodating the gas.

In addition, in the present invention, the pair of electrodes may include at least one discharge electrode installed in a space in which the liquid or gas inside the body is accommodated and discharged when a high voltage pulse or power is applied thereto; And at least one earthing electrode facing the discharge electrode, the earthing electrode being installed in a space where the gas or the liquid inside the body is accommodated to correspond to the discharge electrode.

According to an embodiment of the present invention, as the liquid passing through the inside of the body is jetted at a high speed from the inside of the body by the fluid flow guide member, a space in which the liquid and the gas are accommodated is formed inside the body, An electrode for plasma discharge is provided in the space where the plasma discharge is performed, thereby preventing the dielectric breakdown and maintaining a stable plasma discharge state.

Further, since the plasma discharge state can be stably maintained in the space in which the liquid and the gas are accommodated, a large amount of active radicals can be directly secured and utilized, and the efficiency of the water treatment can be enhanced.

1 is a front sectional view showing a state in which a gas-liquid contacting device for water treatment according to an embodiment of the present invention is connected to a water tank,
2 is a front sectional view showing a gas-liquid contact apparatus for water treatment according to an embodiment of the present invention,
3 is a plan view showing a fluid flow guide member of a gas-liquid contact apparatus for water treatment according to an embodiment of the present invention,
4 is a side sectional view showing a fluid flow guide member of a gas-liquid contact apparatus for water treatment according to another embodiment of the present invention,
5 is a perspective view showing a fluid flow guide member of a gas-liquid contact apparatus for water treatment according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

FIG. 1 is a front sectional view showing a state in which a gas-liquid contacting device for water treatment according to an embodiment of the present invention is connected to a water tank, FIG. 2 is a front sectional view showing a gas- Fig. 4 is a side sectional view showing a fluid flow guide member of a water treatment type gas-liquid contact apparatus according to another embodiment of the present invention, Fig. 5 Is a perspective view showing a fluid flow guide member of a gas-liquid contact apparatus for water treatment according to another embodiment of the present invention.

As shown in these drawings, the water-vapor-liquid contactor 10 for water treatment according to an embodiment of the present invention is installed inside a body 310, A fluid flow guide member 500 for guiding the flow of the liquid to form a space; A pair of electrodes 410 installed in a space in which the liquid inside the body 310 and the gas are accommodated; And a high voltage generator 400 for applying a high voltage pulse or power to the pair of electrodes 410.

The contaminated water treatment system largely includes a water tank 100 and a gas-liquid contact device 10 for water treatment. Here, the term " contaminated water " refers to water, wastewater, and wastewater discharged from various industrial facilities such as homes, factories, Sewage and so on.

The water tub 100 is provided with a contaminated water inlet port 11 and a transfer pipe 110 so that contaminated water can be selectively introduced and discharged. The transfer pipe 110 is connected to the water- And the contaminated water in the water bath 100 is transferred to the water pump 200 by the operation of the water pump 200.

At this time, the positions of the contaminated water inlet port 11 and the transfer pipe 110 are not particularly limited. However, the contaminated water inlet port 11 is provided on the upper part of the water tub 100 for the movement of contaminated water, 110 are provided in the lower part of the water tub 100.

The transferred polluted water flows into the plasma processing unit 300 by the water pump 200, and the inflowed polluted water is purified and discharged to the outside.

In addition, the water-vapor-liquid contactor 10 can be applied to a water supply system to discharge the sterilized water to the outside.

2, the water-treatment gas-liquid contact device 10 includes a plasma processing unit 300, an inlet pipe 320, an outlet pipe 330, and a water pump 200. As shown in FIG.

The water pump 200 forcibly sucks the polluted water stored in the water tub 100 through the transfer pipe 110 and pressurizes the polluted water forcedly inhaled to a high pressure to be forced by the plasma processing unit 300 through the inflow pipe 320 .

The plasma processing unit 300 includes a body 310, a fluid flow inducing member 500, an electrode 410, and a sealing member 540.

The body 310 is connected to an inflow pipe 320 through which a contaminated liquid flows into a lower end of the body 310 in a hollow pipe shape and to an outlet pipe 330 through which purified liquid is discharged at an upper end thereof.

At this time, the sealing member 540 may be provided between the body 310 and the inflow pipe 320 so that the liquid does not flow between the body 310 and the inflow pipe 320.

The sealing member 540 may be provided between the body 310 and the outlet pipe 330 so that the liquid does not flow between the body 310 and the outlet pipe 330.

The body 310 is made of a transparent glass or an insulator such as a synthetic resin so that a high-voltage pulse applied to the electrode 410 or a power source is not energized during plasma generation.

The fluid flow inducing member 500 is installed inside the body 310 to induce a flow of the fluid to form a space for accommodating the liquid and the gas by spraying the passing liquid at a high speed.

The fluid flow guide member 500 includes a fluid flow passage 520 in which the other side of the fluid flowing out from one side to which the liquid flows is formed to have a reduced diameter in order to eject liquid at high speed; And an ejection port (510) for ejecting the liquid that has passed through the fluid transfer passage (520) in a concentric manner so as to form a space in which the gas is accommodated.

The fluid flow guide member 500 is formed in a size and shape corresponding to the inner surface of the body 310 so that the inner space of the body 310 is divided into the lower space portion and the upper space portion, And the liquid in the lower space portion is ejected to the upper space portion.

Here, the body 310 may be formed in a polygonal shape such as a rectangular shape, and the fluid flow guide member 500 may be formed in a polygonal shape such as a square shape.

The fluid flow guide member 500 is press-fitted into the inner intermediate side of the body 310.

At this time, the fluid flow inducing member 500 has a fixing protrusion 530 protruded from the outer surface at a predetermined interval so as to be spaced apart from the fixing protrusion 530. The body 310 is spaced apart A fixing groove into which the fixing protrusion 530 is fitted may be formed.

The fluid flow guide member 500 is fixed to the inner surface of the body 310 by a fixing protrusion 530 formed on the outer surface of the body 310 so that the fluid flow guide member 500 can be firmly coupled to the middle portion of the body 310 do.

In addition, the present invention may include at least one sealing member 540 between the body 310 and the fluid flow guide member 500 so that liquid does not flow between the body 310 and the fluid flow guide member 500.

The sealing member 540 is deformed when a pressure is applied by an elastic rubber ring having a circular cross section so that a gap between the body 310 and the inlet pipe 320 and a gap between the body 310 and the outlet pipe 330 And the gap between the body 310 and the fluid-flow guide member 500 is blocked.

Here, the fluid transfer passage 520 is formed such that the other side of the fluid discharge port is smaller in diameter than the one side to which the liquid flows in order to eject the liquid on the highway, and the jet port 510 is connected to the fluid transfer passage 520 to receive the gas So that the liquid that has passed through the fluid transfer passage 520 is spoutingly ejected to form a space.

4 (a), the jet port 510 may be extended upward to have the same diameter as that of the other side of the fluid transfer passage 520 from which the liquid flows, and as shown in FIG. 4 (b) The protrusions may be protruded in the shape of protrusions or screws on the extended inner surface.

5 (a), the fluid transfer passage 520 and the jet port 510 may be spaced apart from each other as shown in FIG. 5 (a) .

Accordingly, the fluid flow guide member 500 ejects the high-pressure liquid supplied from the water pump 200 at a high speed into the space above the body 310.

At this time, the fluid flow inducing member 500 sprays the liquid to form a space in which the liquid and the gas are accommodated in the upper space.

That is, in the upper space part, a space for receiving the liquid is formed on the upper side and a space for accommodating the gas is formed on the lower side by the fluid flow guide member 500 for spraying the liquid in a circular manner.

Here, the boundary between the space in which the liquid is received and the space in which the gas is accommodated is formed in the form of a supermarket with a wide upper side and a narrow lower side.

The electrode 410 is installed in an upper space part where the liquid inside the body 310 and the gas are received. The electrode 410 is connected to the discharge electrode 410a to which high voltage pulse or power is applied from the high voltage generating part 400, And an earth electrode 410b.

That is, at least one of the pair of electrodes 410 is disposed in a space where a high-voltage pulse or power is applied, and discharges the discharge electrode 410a. The ground electrode 410b faces the discharge electrode 410a. One or more of which is installed in the space in which the upper space portion liquid is accommodated.

As described above, according to the present invention, the discharge electrode (410a) is installed in a space in which the gas is accommodated in the upper space portion of the body (310), and the earth electrode (410b) is installed in the space where the liquid is accommodated to discharge the plasma, Thereby enabling a large amount of active radicals to be secured in water, thereby increasing the efficiency of the water treatment.

The discharge electrode 410a is installed in a space in which the gas inside the body 310 is accommodated and the earth electrode 410b is installed in a space in which the liquid inside the body 310 is accommodated to correspond to the discharge electrode 410a The ground electrode 410b may be installed in a space in which the gas inside the body 310 is accommodated so that the earth electrode 410b corresponds to the discharge electrode 410a have.

In addition, an ultraviolet lamp (not shown) having sterilizing capability may be installed in the space in which the gas is accommodated to improve the sterilizing ability.

The high voltage generating unit 400 applies a high voltage pulse or power to the pair of electrodes 410 to supply a high voltage DC power to the electrode 410 so that plasma can be easily generated.

As described above, the water-vapor-liquid contactor 10 for water treatment according to the present invention is configured such that the liquid passing through the inside of the body 310 is injected at a high speed in the body 310 by the fluid flow guide member 500, 310 are provided in the space where the liquid and the gas are accommodated and the electrode 410 for plasma discharge is installed in the space where the liquid and the gas are accommodated, the dielectric breakdown can be prevented and the stable plasma discharge state can be maintained.

In addition, since the plasma discharge state can be stably maintained in the space in which the liquid and the gas are accommodated, a large amount of active radicals can be directly secured and utilized, and the water treatment efficiency can be enhanced.

That is, when the plasma discharge state is maintained, a large amount of OH radicals are continuously generated in the water, and some of them generate hydrogen peroxide and cause an oxidation reaction with the organic substances contained in the water.

That is, the active radicals do not act only on the surface of water as in the prior art, but rather generate a large amount of active OH radicals in the water, and immediately oxidize and decompose the organic substances in the water.

Since the oxidation reaction is continuously performed as long as the plasma is stably maintained, the purification treatment speed is also significantly increased.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them.

It is also to be understood that the terms such as " comprises, " " comprising, " or " having ", as used herein, mean that a component can be implanted unless specifically stated to the contrary. But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Gas-liquid contacting device for water treatment
11: Contaminated water inlet
100: water tank
110: transfer pipe
200: Water pump
300: Plasma processing part
310: Body
320: inlet pipe
330: Outflow pipe
400: High voltage generator
410: Electrode
500: fluid flow guide member
510:
520: fluid passage
530: Fixing projection
540: sealing member

Claims (3)

A fluid flow guide member installed inside the body, for guiding the flow of the fluid so as to form a space for accommodating the liquid and the gas by jetting the passing liquid at high speed;
A pair of electrodes provided in a space in which liquid and gas are accommodated in the body; And
A high voltage generator for applying a high voltage pulse or power to the pair of electrodes;
Liquid contact member.
The method according to claim 1,
Wherein the fluid flow guide member comprises:
A fluid transfer passage in which the other side of the liquid to which the liquid flows out than the one side into which the liquid flows is formed to have a reduced diameter so as to eject the liquid on the highway; And
An ejection port for circularly ejecting the liquid that has passed through the fluid transfer path so as to form a space for accommodating the gas therein;
Liquid contact member.
The method according to claim 1,
The pair of electrodes may be formed,
One or more discharge cells installed in a space in which the liquid or gas inside the body is accommodated and discharging when a high voltage pulse or power is applied; And
At least one earth electrode disposed in a space in which a gas or liquid inside the body is accommodated to correspond to the discharge electrode and facing the discharge electrode;
Wherein the gas-liquid contact device comprises:

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