KR101398348B1 - Apparatus for treating waste water enable of preventing scum - Google Patents

Abstract

The present invention relates to a waste water treating device that can prevent scum. In particular, the waste water treating device comprises a water tank that includes a plasma generator therein and has a waste water inlet through which waste water is fed and a treated water outlet through which treated water is discharged; an electric current supply unit that supplies an electric current to the plasma generator; an air supply pipe that supplies air to the plasma generator; and a propeller that is equipped on the inner top surface of the water tank. Air is continuously supplied to the plasma generator through the air supply pipe so that a short circuit does not occur in the electrode of the plasma generator even through the plasma generator is put in water. Accordingly, waste water can be purified by means of high voltage discharge. Also, scum (a bubble-type suspended material) that occurs due to gases including ozone generated through the high voltage discharge is removed by means of a propeller, so that an increase in pressure inside the water tank can be prevented.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wastewater treatment apparatus capable of removing scum,

The present invention relates to a wastewater treatment apparatus, and more particularly, to a wastewater treatment apparatus, which is capable of preventing an increase in internal pressure of a water tank by removing scum (suspended matter in the form of foam) generated by a gas such as ozone generated by high- To a wastewater treatment apparatus capable of stably discharging a high voltage while increasing the durability of the plasma generator.

In general, various technologies are being used to treat pollutants emitted from odorous and harmful gas sources such as livestock complexes, food processing plants, sub-wastewater and manure treatment plants, and industrial complexes.

At present, the most widely used technologies are adsorption and cleaning methods. Especially, air pollution prevention facilities include dust collectors, activated carbon towers, and scrubbers. Among them, scrubbers are most widely applied because they can treat odor and harmful gas, dust and liquid pollutants at the same time.

The scrubber is also called a gas absorption tower and generally refers to a dust collecting facility by cleaning. The scrubber is divided into dry, wet and mixed type according to the kind and use, and a wet scrubber which is more efficient than a dry scrubber is used. Wet scrubber is a method to purify contaminants by washing harmful gas with liquid. In order to increase purifying efficiency, it usually uses expensive chemicals such as absorbents such as sodium hydroxide, sulfuric acid or detergent, which cause various chemical reactions. Use with water. This is to increase the contact rate with harmful gas when the water containing chemicals is sprayed, and to improve the treatment efficiency by purifying polluted water.

However, since the wet scrubber is rapidly consumed by the chemical reaction due to the reaction with the pollutant gas and the chemical reaction, it is necessary to periodically replenish the expensive chemical, and it is necessary to supplement the chemical and the pollutant gas There is a problem that it is costly.

One of the biggest problems is that 1) it can not be operated continuously because it uses expensive chemicals, and 2) wastewater containing chemicals and pollutants is generated secondarily after the hazardous gas treatment process. Especially, when the generated wastewater is discharged without any additional treatment, it causes another kind of environmental pollutant such as water pollution, and thus it has a critical drawback to solve the problem of the secondary wastewater treatment.

In recent years, techniques for increasing the purification efficiency by injecting ozone into water and using ozone water or supplying chemical and ozone at the same time have been developed to solve the above problems. To treat noxious gases and odors, and to reduce the wastewater generated secondarily. However, since the ozone generator for supplying ozone requires high power consumption and high-purity oxygen must be supplied in order to generate ozone at a high concentration, it is limited to a place where high-purity oxygen is generated, or an additional facility is required. Further, in order to generate or maintain dissolved ozone at a predetermined level or more, it is necessary to drive the ozone generator for several hours, so that it is difficult to continuously operate the ozone generator, do.

In this connection, the present inventor has proposed a cylindrical tube made of a dielectric material having open ends at both ends through Korean Patent Registration No. 1,233,568 (the name of the invention: a plasma generator and a malodor reduction apparatus using the same). A support having one end of the cylindrical tube coupled thereto; A metal mesh enclosing the outside of the cylindrical tube; An outer electrode penetrating the support member and connected to the metal mesh; And a tubular inner electrode disposed inside the cylindrical tube through the support member and having an air inlet at one side of the support and an air outlet at the other side of the support tube where the cylindrical tube is located have. However, the above-mentioned patent has a disadvantage in that it can easily and easily remove odors and is excellent in the effect of air sterilization and / or odor reduction, but is not suitable for treating wastewater since it is for odor reduction.

Conventionally, a method using underwater high-voltage discharge has been developed to treat sewage and wastewater containing sewage, but the air introduced for underwater high-voltage discharge causes air bubbles in water or a large amount The scum of the scum is generated, so that it is inevitably limited to be used for water treatment.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a plasma processing apparatus capable of purifying wastewater by high voltage discharge while preventing a short circuit of its electrode even if a plasma generator exists in water, And it is an object of the present invention to provide a wastewater treatment apparatus capable of preventing the increase of the pressure in the water tank by removing scum (suspended matter in the form of foam) generated by the gas.

According to an aspect of the present invention, there is provided a wastewater treatment apparatus capable of eliminating a scum, comprising: a water tank including a plasma generator therein and having a wastewater inlet port through which waste water flows and a process water outlet port through which treated water is discharged; An air supply pipe for supplying air to the plasma generator; A current supplier for supplying a current to the plasma generator; And a propeller provided on the upper surface of the water tank.

Here, it is preferable that the present invention further includes a fine grating located inside the water tub above the treated water outlet side.

The present invention may further comprise a gas discharge pipe connected at one end between the fine grid and the treated water discharge port in the water tank, and a heating element provided on the gas discharge pipe.

In addition, the present invention may further include an activated carbon storage portion connected to the other end of the gas discharge pipe and having a gas discharge port.

Further, it is more preferable that the water tank includes two or more plasma generators, and the propeller is provided between the two or more plasma generators.

The details of other embodiments are included in the detailed description and drawings.

The present invention has the effect of continuously purifying the wastewater by high voltage discharge by continuously supplying air to the plasma generator through the air supply pipe so that the electrode is not short-circuited even if the plasma generator is present in the water.

In addition, according to the present invention, a scum generated by gas such as ozone generated by the high-voltage discharge is removed by a propeller located on the upper surface of the water tank, It is.

Thus, the present invention can provide a wastewater treatment apparatus capable of stable high-voltage discharge while increasing the durability of the plasma generator.

1 is a schematic view showing a configuration of a wastewater treatment apparatus capable of removing scum according to a preferred embodiment of the present invention,
2 is a schematic view for explaining an example of a wastewater treatment apparatus including a fine grating according to the present invention,
FIG. 3 is a schematic view for explaining an example of a wastewater treatment apparatus including a heating body on a gas discharge pipe according to the present invention,
FIG. 4 is a schematic view for explaining an example of a wastewater treatment apparatus, which includes an activated carbon storage unit according to the present invention,
5 is a side view and a cross-sectional view for explaining an example of a plasma generator according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

1 is a schematic diagram showing the construction of a wastewater treatment apparatus capable of removing scum according to a preferred embodiment of the present invention.

The apparatus for treating wastewater according to the present invention includes a water tank 100; An air supply pipe 200; A current supply unit 300; And a propeller (400). The present invention can be a device for purifying wastewater such as sewage, sewage, living water, and polluted water by using a high voltage discharge of the plasma generator.

The water tank 100 includes a plasma generator 1 and has a wastewater inlet 110 through which wastewater flows and a wastewater outlet 120 through which process wastewater is discharged. Thus, the wastewater flowing into the water tank 100 is treated with a high voltage discharge of the plasma generator 1 according to the present invention to purify and discharge the wastewater. The type of the water tank 100 is not particularly limited, and includes everything known to those skilled in the art (hereinafter referred to as " a person skilled in the art "). The positions of the wastewater inlet 110 and the process water outlet 120 provided in the water tank 100 are also not limited to any particular one, , It is preferable that the flow of wastewater and / or treated water can be made longest in the water bath 100, In addition, the wastewater inlet 110 is located at the top (or top) and the bottom (or bottom) of the treated water outlet 120 is located in the vertical direction of the wastewater and / It is preferable to increase the fluidity.

The plasma generator 1 included in the water tank 100 is a high voltage discharge device for generating ozone or the like for treating wastewater, and is not particularly limited and may include anything known to those skilled in the art. For example, the various plasma generators described in Korean Patent No. 1,233, 568 and their respective components and their descriptions can be applied equally or similarly to the present invention, except as otherwise described herein. The plasma generator (1) includes a cylindrical tube (10) having both open ends and a dielectric body; A support 20 coupled to one side of the cylindrical tube; An inner electrode (30) penetrating through the support and positioned inside the cylindrical tube; A coil-shaped external electrode (40) penetrating through the support and surrounding the outside of the cylindrical tube; And an air transfer tube 50 for transferring air into the cylindrical tube (see FIG. 5). The present invention can be applied to a plasma generator 1 having a coil- Type outer electrode 40, it is possible to minimize the deposition of the floating material on the outer electrode, unlike the conventional metal mesh or the network-type outer electrode, thereby increasing the durability of the outer electrode 40, Can be stably generated.

It is preferable that the plasma generator 1 is included in the water tank 100 and that two or more of the plasma generators 1 are arranged in parallel at a predetermined interval and that the plasma generator 1 is disposed inside the water tank 100 Is also not particularly limited. The upper part of the plasma generator 1 is connected to the water tub 100 so that the air for high voltage discharge is supplied upward in the plasma generator 1 and the ozone generated by the discharge is discharged downward. It is suitable to be coupled to the upper surface.

The air supply pipe 200 supplies air to the plasma generator 1 for discharging. If the number of the plasma generators 1 is two or more, the air supply pipe 200 according to the present invention may consist of one continuous pipe and continuously supply air to each of the plasma generators 1. The air supplied from the air supply pipe 200 flows into the cylindrical pipe 10 through the air transfer pipe 50 of the plasma generator 1 and the air thus introduced flows through the internal electrode 30 and the external electrode 40 It is possible to cause a high voltage discharge even in the case where the plasma generator 1 according to the present invention is present in water. The OH radicals, ozone, ultraviolet rays, discharge energy, and the like generated by the high voltage discharge treat the odor and / or wastewater. At this time, if the odor is introduced into the air supply pipe 200 rather than the general air, the wastewater treatment apparatus according to the present invention has a function of treating odors together with wastewater treatment.

The current supply unit 300 supplies a current for discharging to the plasma generator 1. If there are two or more plasma generators 1, the current supply unit 300 according to the present invention may separately supply current to each of the plasma generators 1.

The propeller (400) is provided on the upper surface of the water tank (100). The propeller 400 is not particularly limited, and includes all those having a rotatable wing. The propeller 400 is provided on the upper surface of the water tank 100 and has a function of removing scum formed in the water tank 100. That is, when high-voltage discharge is generated by using the plasma generator 1 according to the present invention, fine particles (proteins, saccharides, surfactants, etc.) contained in the air, odor and / Scum is generated on the surface of water (wastewater and / or treated water) owing to underwater aeration by ozone or the like ejected from the lower end. The scum thus generated increases the pressure inside the water tub 100 and accordingly lowers the durability of the wastewater treatment apparatus including the plasma generator 1. When discharged to the downstream end of the treated water outlet 120, For example, ozone treatment). Accordingly, the present invention provides a propeller (400) on the upper surface of the water tank (100), so that scum generated on the water surface can be removed immediately.

For this purpose, the propeller 400 is preferably disposed at the rear end of the plasma generator 1, that is, at the treated water outlet 120, within the water tub 100 to remove the scum generated from the plasma generator 1 . It is further preferable that the propeller 400 is provided between two or more plasma generators 1 when the water tub 100 includes two or more plasma generators 1.

The present invention can purify wastewater by high-voltage discharge while preventing the electrodes of the plasma generator from being short-circuited, and at the same time, remove scum generated by gas such as ozone generated by the high-voltage discharge Thereby preventing an increase in pressure in the water tank.

FIG. 2 is a schematic view for explaining an example of a wastewater treatment apparatus according to the present invention, which includes a fine grating 500.

The present invention shown in the drawings is intended to prevent the scum which has not been removed by the propeller 400 from being discharged to the gas discharge pipe 600.

The fine grating 500 may be a general mesh structure or may be a lattice type partition having fine holes. The fine grating 500 can remove or separate the scum by a mesh or a hole. For this, the fine grid 500 is preferably located inside the water tank 100 in front of the gas discharge pipe 600, and more preferably located above the treated water discharge port 120 side. That is, the propeller 400 is disposed at the rear end of the propeller 400 or between the propeller 400 and the gas discharge pipe 600 or between the propeller 400 and the process water outlet 120 and is removed or removed by the propeller 400 It is possible to remove the scum that is present on the water surface naturally by being located on the upper or upper surface of the inside of the water tub 100. [

3 is a schematic view for explaining an example of a wastewater treatment apparatus, which includes a heating body 610 on a gas discharge pipe 600 according to the present invention.

The present invention shown here is for removing moisture and some ozone contained in the gases remaining after treatment through the heating element 610 on the gas exhaust pipe 600.

The gas discharge pipe 600 discharges gases left inside the plasma generator 1 and / or the water tank 100 according to the present invention. It is preferable that the gas exhaust pipe 600 is connected at one end between the fine grating 500 and the treated water outlet 120 at the upper part of the water tank 100. This is advantageous because the scum contained in the wastewater and / And suspended solids can be removed through the fine grating 500 and are suitable for separating only the remaining gaseous components including ozone separately before being discharged into the treated water.

Further, the present invention is characterized by further including a heating element 610 provided on the gas exhaust pipe 600. The heating element 610 includes all the structures that emit heat, and may be, for example, a ceramic heating element. The inside of the water tank 100 has a very high humidity due to scum particles and moisture of the scum. In the present invention, the heater 610 is provided on the gas discharge pipe 600 to remove moisture and some ozone from the gas passing through the gas discharge pipe 600, The ozone treatment efficiency (reactivity of ozone and activated carbon) can be increased. If the heating element 610 has a honeycomb structure, such an effect can be further enhanced, which is preferable.

4 is a schematic view for explaining an example of a wastewater treatment apparatus including an activated carbon storage unit 700 according to the present invention.

The present invention shown here is for completely removing ozone which may remain in a trace amount in the dehumidified gas by the heating element 610 of the gas exhaust pipe 600.

The activated carbon storage part 700 includes activated carbon 710 and has one end connected to the other end of the gas discharge pipe 600 and a separate gas discharge port 720. Since the activated carbon storage part 700 is connected to the gas discharge pipe 600, the gas passing through the gas discharge pipe 600 is transferred to the activated carbon storage part 700 where it reacts with the activated carbon 710, And the gas thus treated is discharged to the outside through the gas outlet 720.

The present invention as described above is capable of not only water treatment but also odor treatment and water treatment at the same time. In addition, scum due to bubbles generated in the plasma generator can be removed. Further, at the time of malodor treatment, secondary treatment with dissolved ozone in water is possible. In addition, it can be applied regardless of the characteristics of wastewater during water treatment. In addition, the system has a sterilization effect as well as a malodor and water treatment, so that various functions can be performed at the same time.

Although the present invention has been shown and described with respect to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those skilled in the art.

1: Plasma generator
10: Cylindrical tube
20: Support
30: internal electrode
40: external electrode
50: air delivery pipe
100: water tank
110: wastewater inlet
120: treated water outlet
200: air supply pipe
300: current supply unit
400: Propeller
500: fine grid
600: gas discharge pipe
610: Heating element
700: Activated carbon storage part
710: Activated carbon
720: gas outlet

Claims (5)

delete A water tank including a plasma generator therein and having a wastewater inlet through which wastewater flows and a process water outlet through which treated water is discharged;
An air supply pipe for supplying air to the plasma generator;
A current supplier for supplying a current to the plasma generator; And
And a propeller provided on an upper surface of the water tank,
Further comprising a fine grid located above the treated water outlet side in the water tank.
3. The method of claim 2,
A gas discharge pipe having one end connected between the fine grid and the process water outlet in the water tank,
Further comprising a heating element provided on the gas discharge pipe.
The method of claim 3,
Further comprising an activated carbon storage part connected to the other end of the gas discharge pipe and having a gas discharge port.
A water tank including a plasma generator therein and having a wastewater inlet through which wastewater flows and a process water outlet through which treated water is discharged;
An air supply pipe for supplying air to the plasma generator;
A current supplier for supplying a current to the plasma generator; And
And a propeller provided on an upper surface of the water tank,
Wherein the water tank comprises two or more plasma generators,
Wherein the propeller is provided between the at least two plasma generators.

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