KR102026185B1 - Plasma type water treatment device with improved treatment efficiency by micro bubble - Google Patents

Abstract

Provided is a plasma water treatment apparatus having a structure capable of increasing reaction efficiency of microbubbles, which is to allow microbubbles supplied to to-be-treated water to be in more active contact with contaminants and to occur a reaction while a large amount of the to-be-treated water is purified by continuously supplying plasma-treated air to the to-be-treated water. The plasma water treatment apparatus of the present invention comprises: a plasma processing unit for passing air through a plasma region to discharge the same; a gas-liquid mixing unit connected to the plasma processing unit by a connection pipe to disperse air in to-be-treated water in a microbubble form; a mixing unit connected to the gas-liquid mixing unit by a middle pipe to allow the to-be-treated water to be introduced to pass therethrough; a discharge pipe for discharging the to-be-treated water from the mixing unit; and a water tank for receiving the to-be-treated water from the discharge pipe. The mixing unit includes a housing through which to-be-treated water passes, and a plurality of fillers filled in the housing.

Description

Plasma Water Treatment System Improved Water Treatment Efficiency by Microbubble {PLASMA TYPE WATER TREATMENT DEVICE WITH IMPROVED TREATMENT EFFICIENCY BY MICRO BUBBLE}

The present invention relates to a plasma water treatment device that improves the treatment efficiency by the micro-bubble, and more particularly, to maximize the contact area with contaminants in water by forming and maintaining fine bubbles containing ozone, OH radicals and the like. The present invention relates to a plasma water treatment apparatus having a structure having improved water treatment efficiency.

As wastewater treatment methods, various methods have been developed, such as using ozone, adding chemicals such as hypochlorous acid (HClO) to contaminated water, using ultraviolet light, and using heat treatment.

However, there is a problem that sufficient purification performance cannot be obtained by such conventional methods, or excessive cost is required for contaminated water treatment, and a method of purifying wastewater using plasma discharge has been actively studied in recent years.

A water treatment apparatus using plasma purifies waste water by oxidizing and decomposing ozone generated by plasma treatment of air, and various harmful substances present in water such as OH, H 2 O 2, UV, and HO 2.

FIG. 1 shows the structure of a plasma water treatment apparatus as described in Korean Patent Publication No. 10-0924649.

Referring to Fig. 1, a quartz tube 2, which is a dielectric tube, is installed in a water tank 1, and a counter electrode 6 is installed in water.

When air is supplied into the quartz tube 2 through the air inlet 7a of the head 7, air is plasma-processed by the plasma generated by the discharge electrode 3 in the quartz tube 2, and ozone and active radicals are supplied. A large amount occurs.

Such air is dispersed in the water in the form of microbubbles as it passes through the bubble generator 4, and contaminants in the water react with ozone and active radicals in the microbubbles to be oxidized and decomposed to purify.

The discharge electrode 3 provided to generate plasma in the quartz tube 2 is formed in a coil shape 3a and is in close contact with the inner circumferential surface of the quartz tube 2.

The coil-shaped discharge electrode 3 in close contact with the inner circumferential surface of the quartz tube 2 generates creeping discharge along the inner circumferential surface of the quartz tube 2, and the air flowing inside the quartz tube 2 is wide along the creeping discharge region. A wide plasma reaction can occur.

However, the above-described conventional plasma generator is manufactured to generate fine bubbles from the bubble generator 4 in a predetermined amount of water to be stored in a water tank to oxidize, decompose and purify contaminants, thereby processing a large capacity. There is a problem that can not be exercised.

In order to solve this problem, there is a need for the construction of a water treatment apparatus capable of treating a large amount of water to be treated by continuously supplying microbubbles including ozone, OH radicals, etc. to the water to be continuously supplied.

In the case of a water treatment apparatus capable of such continuous treatment, it is necessary to improve the reaction efficiency of microbubbles, since ozone and OH radicals of microbubbles need to be actively and sufficiently contacted with contaminants while the water to be treated flows. have.

The present invention has been derived from the above point of view, and an object of the present invention is to provide a plasma water treatment apparatus configured to purify a large amount of water to be treated by continuously supplying plasma-treated air to the water to be treated in a pipe. To provide.

Another object of the present invention is to purify a large amount of water to be treated by continuously supplying the plasma-treated air to the water to be treated, so that the micro-bubbles supplied to the water to be treated more actively in contact with the contaminants to react It is to provide a plasma water treatment apparatus having a structure that can increase the reaction efficiency of the micro-bubbles.

Plasma water treatment apparatus of the present invention for achieving the above object, the plasma processing unit for passing the air through the plasma region and discharged, the air is discharged by plasma treatment from the plasma processing unit is connected by the plasma processing unit and the connection pipe is A gas-liquid mixing unit supplied through a connection pipe and dispersed in a micro bubble form to the water to be treated, a mixing unit through which the water to be treated discharged from the gas-liquid mixing unit flows in, and connected to the mixing unit to be processed by the mixing unit. And a discharge pipe for discharging the object water and a tank for receiving the water to be treated from the discharge pipe, wherein the mixing unit includes a housing through which the object water passes, and a plurality of fillers filled in the housing. It features.

In addition, the plasma water treatment apparatus of the present invention is characterized in that the inlet portion and the outlet portion of the housing different in diameter, the outlet portion is formed narrower than the inlet portion.

In addition, the plasma water treatment device of the present invention is characterized in that the distal end portion of the discharge pipe is installed higher than the surface of the water tank so that the water to be treated falls from the discharge pipe to the water tank and impacts the water surface.

In addition, the plasma water treatment apparatus of the present invention includes a drain port through which the water to be treated is discharged from the water tank, and in the space between the water surface of the water tank and the ceiling of the water tank, an air layer in which the microbubbles float on the water surface and collects air is formed. By generating, the water to be treated falling into the water surface of the water tank is characterized in that the air of the air layer is re-introduced below the water surface.

Plasma water treatment apparatus according to the present invention, the plasma-treated air generated in the plasma processing unit is supplied to the flow tube from the gas-liquid mixing unit, it is possible to continuously supply the active gas such as ozone, OH radicals to the treated water flowing continuously through the flow tube. have.

In addition, the present invention is connected to the intermediate pipe is provided with a mixing unit for the treatment object water flows in and passes, the mixing unit includes a housing through which the treatment object water passes, and a plurality of fillers filled in the housing. Accordingly, while the water to be treated in the mixing unit passes between the fillers, the water to be treated and the microbubbles are actively mixed with each other, whereby contaminants, ozone and radicals are actively contacted to purify each other. This is facilitated.

In addition, in the present invention, the outlet portion of the housing of the mixing portion is formed narrower than the inlet portion, causing an increase in pressure in the interior of the housing, the increased pressure to press the micro bubbles to suppress expansion and growth of the micro bubbles, a plurality of fillers In the process of bumping, it is more likely to break into small bubbles.

On the other hand, in the present invention, the distal end portion of the discharge pipe into which the water to be treated enters the water tank is installed higher than the water surface of the water tank, so that the water to be treated drops from the water discharge pipe into the water tank to impact the water surface. These shocks intensify the flow of treated water falling into the tank, causing microbubbles to actively contact with contaminants, and bringing air containing ozone and OH radicals collected above the water back to the surface of the water. It will act to create more bubbles, maximizing the purification to oxidize, decompose and remove contaminants.

In addition, in the configuration in which the distal end of the discharge line is higher than the water surface of the water tank, since the air layer is located between the distal end of the discharge line and the water surface, when the entire water treatment device is in operation, the water flow back through the discharge line is reduced even if the air layer presses the water surface. It also has the effect of preventing it from occurring.

1 is a configuration explanatory diagram showing the overall configuration of a conventional plasma water treatment apparatus;
2 is a configuration explanatory diagram showing an overall configuration of a plasma water treatment apparatus according to an embodiment of the present invention.
3 is a configuration explanatory diagram showing a cross-sectional configuration of the mixing unit and the water tank in the plasma water treatment device according to an embodiment of the present invention.
4 to 7 are photographs showing the test results confirming the micro-bubble generating action according to the installation configuration of the mixing section and the discharge pipe in the plasma water treatment apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3, the plasma water treatment apparatus according to the embodiment of the present invention, the plasma processing unit 10 for discharging air through the plasma region, the plasma processing unit 10 and the connection pipe 15 The air-liquid mixing unit 20 and the gas-liquid mixing unit 20 are connected to each other and the air discharged by plasma treatment from the plasma processing unit 10 is supplied through the connection pipe 15 to be dispersed in the form of fine bubbles in the water to be treated. The mixing unit 40 flowing in and out of the treatment object water discharged from the discharge pipe line 50 is connected to the mixing unit 40 to discharge the treatment object water from the mixing unit 40, and the discharge pipe line 50. Includes a water tank 60 receiving the treatment water.

The plasma processing unit 10 is a portion for discharging air by passing through the plasma region. The plasma processing unit 10 may discharge the plasma while the air passes through the plasma region and contains active species such as ozone and OH radicals. Active species such as ozone and OH radicals oxidize and decompose contaminants to generate a purification effect.

The plasma processing unit 10 is a portion for discharging air through the plasma region, the discharged air is supplied to the gas-liquid mixing unit 20 through the connecting pipe 15 and into the water to be treated in the gas-liquid mixing unit 20. Plasma treated air is supplied.

The plasma processing unit 10 includes a dielectric tube 11 which sucks air at one end and discharges it at the other end and is disposed in a horizontal direction in a longitudinal direction, and air which flows by generating plasma in the dielectric tube 11. And a discharge electrode 12 to be processed.

The dielectric tube 11 is disposed in the horizontal direction in the shape of a hollow tube, the discharge electrode 12 is inserted therein, both ends are open to allow air to pass through the inside.

Plasma is generated from the discharge electrode 12 inside the dielectric tube 11 so that air passing through is plasma-treated to generate active species such as ozone and OH radicals in the air.

Most preferably, the dielectric tube 11 is a quartz tube, and a ceramic tube or a glass tube is also possible.

The plasma processing unit 10 further includes a counter electrode installed outside the dielectric tube 11 and a power source 19 connected to the discharge electrode 12 and the counter electrode to cause plasma discharge.

The counter electrode is a portion that electrically faces the discharge electrode 12 with the wall of the dielectric tube 11 interposed therebetween. In this embodiment, the cover 17 surrounding the dielectric tube 11 from the outside is used as the counter electrode. .

Since the cover 17 is formed of a conductive metal body in contact with the cooling water flowing therein, the cover 17 is in electrical contact with the outer circumferential surface of the dielectric tube 11 via the cooling water.

The cover 17 surrounds the dielectric tube 11 in a cylindrical shape, and is coupled to block one end and the other end of the cover 17 so that the one end blocking plate 17a and the other end blocking plate 17b are blocked, and the cover 17 is closed. Cooling water inlet (17d) is provided on the upper side of the one side and the cooling water discharge port (17c) is provided on the lower side of the other side, the cooling water can flow into the cover (17).

The dielectric tube 11 is installed to penetrate the one end blocking plate 17a and the other end blocking plate 17b, and a plurality of the dielectric pipes 11 are arranged in a horizontal direction in parallel with each other at a predetermined interval.

The cooling water flowing through the cooling water inlet 17d of the cover 17 utilizes the treatment target water discharged from the gas-liquid mixing unit 20.

That is, the cooling water flowing inside the cover 17 becomes the treatment target water discharged from the gas-liquid mixing unit 20 including the microbubbles of air plasma-treated, and the treatment target water contacts the outer circumferential surface of the dielectric tube 11. It flows to perform cooling of the dielectric tube 11.

Accordingly, the water to be treated changes in flow paths and disturbances due to the inflow into the cover 17 and the contact with the dielectric tube 11 in the course of the flow thereof, and thus, the micro bubbles and pollutants of the plasma-treated air are generated. Since the active flow and contact with each other, the oxidation, decomposition action of the pollutant can be promoted more.

If the dielectric tube 11 is continuously generated in the plasma without a cooling action, there is a risk that fatigue is accumulated by the heat of discharge, which is broken.

On the other hand, the blocking chamber member 13 is attached to the outer surface of the other end blocking plate 17b is fixed.

The blocking chamber member 13 collects plasma-treated air discharged from each of the plurality of dielectric pipes 11 and supplies them to the connection pipe 15, and a predetermined amount of water at the time of reverse flow through the connection pipe 15. By temporarily accommodating the water, water does not flow into the dielectric tube 11.

The blocking chamber member 13 is a cylinder that forms an inner space, and communicates with the other end of the dielectric tube 11 at one side of the inner space and is connected to the connecting tube 15 at the other side of the inner space.

In the internal space of the blocking chamber member 13, there is a free space equal to the height (H) corresponding to the interval from the bottom to the installation height of the dielectric tube 11 can receive a predetermined amount of water. This serves to block a predetermined amount of water flowing back through the connecting pipe 15 from entering the inside of the dielectric pipe 11.

Meanwhile, referring to FIG. 2, the gas-liquid mixing unit 20 is connected by the plasma processing unit 10 and the connection pipe 15 so that air discharged by plasma treatment from the plasma processing unit 10 is connected to the connection pipe 15. It is supplied through and mixed with the water to be treated.

The gas-liquid mixing unit 20 includes a flow tube 26 through which the water to be treated flows, and a neck portion 22 in which a pressure drop occurs due to a decrease in the flow cross-sectional area of the flow tube 26, and the connection pipe 15 includes a neck portion ( 22).

The neck portion 22 is a portion in which the inflow side 21 gradually narrows and the outflow side 23 gradually widens, and the flow cross section of the treated water suddenly narrows therebetween. Increase and pressure decreases.

The connection pipe 15 is connected to the neck 22 so that the air of the connection pipe 15 is sucked into the water to be treated by the pressure drop of the neck part 22 due to the Bernoulli principle and the Venturi effect.

On the other hand, the intermediate pipe 30 is connected to the cooling water outlet 17c of the cover 17 and the mixing part 40 to each other.

The treated water discharged from the gas-liquid mixing unit 20 cools the dielectric tube 11 in the plasma processing unit 10 and is discharged through the cooling water discharge port 17c of the cover 17, and then passes through the intermediate pipe line 30. While flowing to the mixing unit 40 can be.

Accordingly, one end of the intermediate pipe 30 is connected to the cooling water discharge port 17c and the other end thereof is connected to the inlet 42 of the housing 41 of the mixing part 40.

The intermediate pipe 30 may be omitted because it serves as a simple connecting pipe.

The mixing unit 40 is connected to the intermediate pipe 30 and the treatment object water is introduced and passed through, so that the treatment object water and the micro-bubbles contained in the treatment object water are mixed with each other, and through this, Active contact of pollutants with ozone and radicals facilitates purification.

The mixing part 40 includes a housing 41 through which water to be processed passes, and a plurality of fillers 45 filled in the housing 41. The filler 45 may be a small solid body of polygonal shape or irregular shape, or may be manufactured in a smaller size than normal polling filled in a scrubber device or the like.

The housing 41 is formed in a tubular shape and serves to accommodate a plurality of fillers 45 filled therein, and an inlet portion 42 into which treatment water flows into one end and the other end, and the treatment water is discharged. The outlet part 43 is provided.

The plurality of fillers 45 may be formed in the form of small grains and may be formed of a material such as glass, synthetic resin, or metal, and may allow the microbubbles included in the treated water to actively contact with the contaminants while flowing between the treated water and the treated water. When the microbubbles hit a plurality of fillers 45, the microbubbles are joined to each other to induce fine breakage even though the size is grown.

The smaller the size of the microbubble, the larger the contact area with the treated polyconstant water, which can be actively contacted with the contaminant, so that purification can occur.

In order to induce the fine bubbles to be broken, the inlet portion 42 and the outlet portion 43 of the housing 41 is formed to have a different diameter, the outlet portion 43 is narrower than the inlet portion 42 Form.

Such a configuration causes an increase in pressure inside the housing 41, and the increased pressure presses the microbubbles to suppress expansion and growth of the microbubbles, thereby inducing a more easily broken action.

That is, even if the micro-bubbles combined with each other grow from the four sides by the pressure inside the housing 41, it can be broken easily into small bubbles in the process of hitting a plurality of fillers (45).

On the other hand, the discharge line 50 is connected to the mixing unit 40 is connected to discharge the treatment object water from the mixing unit 40 and guides the treatment object water to the water tank (60).

Discharge pipe line 50 is connected to the outlet 43 of the housing 41 of the mixing portion 40 and the distal end portion 52 of the discharge pipe line 50 is installed higher than the water surface of the water tank 60 discharge pipe line (50) ) To fall to the water tank (60) to impact the water surface.

This impact has the effect of intensely flowing the flow of the object water falling into the water tank 60 to make microbubbles actively contact with the contaminants, and to prevent the microbubbles from growing in size.

In addition, by bringing the air above the water surface below the water surface has the effect of further forming a fine bubble.

In the water tank 60, since the air bubbles flowing in the water tank 60 rise to the surface of the water tank 60 and the air forming the air bubbles gathers to form an air layer, the air layer includes a plurality of ozone and OH radicals. It contains abundant active species.

As described above, the water to be treated impacts the surface of the water, thereby bringing the active species such as ozone and OH radicals in the air layer back down to the surface of the water and reintroducing the same.

The height of the water surface of the water tank 60 is determined by the position or discharge of the drain port 65 installed on the side of the water tank 60, the water tank 60 other than the end portion 52 of the drain port 65 and the discharge pipe passage (50) ) Is sealed, an air layer is formed in the space 62 between the height of the drain port 65 and the ceiling 61 of the water tank 60 in which the fine bubbles float on the water surface and air is collected.

In the tank 60, an ultraviolet lamp 67 is further installed in the water so that ultraviolet rays together with ozone and radicals can increase the sterilization effect of the water to be treated.

Hereinafter, the operation of the plasma water treatment apparatus of the present invention will be described in detail.

First, a power source 19 is applied to generate discharge at the discharge electrode 12 inside the dielectric tube 11, and the water to be treated is supplied to the flow tube 26 by an external pump.

Accordingly, in the neck portion 22 of the gas-liquid mixing portion 20, a pressure drop occurs while the water to be treated passes through the portion where the flow cross-sectional area is narrowed, and air is sucked in from the connecting pipe 15 connected to the neck portion 22.

Referring to FIG. 2, since the connecting pipe 15 is in communication with the internal space of the blocking chamber member 13 and the internal space of the blocking chamber member 13 is in communication with the atmosphere through the interior of the dielectric tube 11, The air in the atmosphere is sucked from one end of the dielectric tube 11 and flows inside by the suction pressure generated in the connecting tube 15.

Since the plasma region is generated by the discharge from the discharge electrode 12 inside the dielectric tube 11, the air passing through the plasma region is plasma-treated to generate active species such as ozone and OH radicals.

Air containing the active species is discharged into the inner space of the blocking chamber member 13 from a plurality of dielectric tubes 11 are installed together and flows sequentially into the connecting tube 15.

Plasma treated air flowing through the connecting pipe 15 is automatically sucked into the water to be treated by the neck portion 22 to be dispersed in the water to be treated in the form of fine bubbles, and ozone, radicals, etc. in the water to be treated are contaminated. Purifies by oxidizing and decomposing contaminants on contact.

This action is a method of inhaling the plasma-treated air while the treatment water flows to disperse the microbubbles in the treatment water, and thus the treatment water can maintain a continuous flow state to treat a large amount of treatment water. That's the way it can be.

Meanwhile, the treated water discharged together with the microbubbles from the gas-liquid mixing unit 20 flows into the cooling water inlet 52 of the cover 17 to perform a cooling operation on the dielectric tube, and then, at the cooling water outlet 17c, It flows into the mixing part 40 via the conduit 30.

In the mixing unit 40, while passing between the fillers 45, the water to be treated and the microbubbles are mixed with each other, whereby contaminants, ozone, and radicals are actively contacted to purify. Is promoted.

In addition, the diameter d1 of the inlet part 42 of the housing 41 of the mixing part 40 is larger than the diameter d2 of the outlet part 43, so that the outlet part 43 is formed in the inlet part ( Is formed narrower than 42).

The configuration in which the outlet portion 43 is formed narrower than the inlet portion 42 causes an increase in pressure inside the housing 41, and the increased pressure presses the micro bubbles to suppress expansion and growth of the micro bubbles. In the process of colliding with the filler 45 will be broken into smaller bubbles more easily.

Through the mixing unit 40, the fine bubbles are broken finely and stirred together, the distal end portion 52 of the discharge pipe line 50 is installed higher than the water surface of the water tank 60, and is treated from the discharge pipe line 50. The object water falls to the water tank 60, and impacts the water surface.

This impact has the effect of intensely flowing the flow of the object water falling into the water tank 60 to make microbubbles actively contact with the contaminants, and to prevent the microbubbles from growing in size.

In addition, the air layer in the upper surface of the water draws the air below the water surface has the effect of further forming a fine bubble.

In the water tank 60, since the air bubbles flowing in the water tank 60 rise to the surface of the water tank 60 and the air forming the air bubbles gathers to form an air layer, the air layer includes a plurality of ozone and OH radicals. It contains abundant active species.

As described above, the water to be treated impacts the surface of the water, and the active species such as ozone and OH radicals in the air layer are dragged back down to the surface of the water and reintroduced.

Accordingly, since the micro-bubbles are formed in the water tank 60 is finely divided, it can form a wide contact area in the water to be treated and react with a wide range of contaminants, the air of the air layer is re-introduced below the water surface Since bubbles are formed, the effect of purifying by contact with contaminants can be maximized.

In addition, as described above, in the configuration in which the distal end portion 52 of the discharge pipe line 50 is installed higher than the water surface of the water tank 60, when the operation of the entire water treatment apparatus is stopped, between the distal end portion 52 of the discharge pipe line 50 and the water surface. The air layer of the serves to prevent the situation in which the water in the water tank (60) flows back to the discharge pipe (50).

That is, when the operation of the entire water treatment apparatus is stopped, the microbubbles in the water are compressed by the water pressure, and then all the microbubbles are gradually raised to the water surface and are collected in the air layer above the water surface.

Since the microbubbles gathered in the air layer are expanded while the water pressure is removed, the air bubbles rise to increase the pressure of the air layer, thereby causing a problem of pressing the water surface. As a result, the distal end portion 52 of the discharge pipe 50 enters the water. Water may flow back into the discharge pipe and rise, and the water flows back to the gas-liquid mixing unit 20, and there is a risk that water may flow back into the connection pipe 15.

However, in the present embodiment, since the distal end portion 52 of the discharge pipe line 50 is installed higher than the water surface of the water tank 60, an air layer is located between the distal end portion 52 and the water surface of the discharge pipe line 50. During operation, even if the air layer presses the water surface, the backflow of water through the discharge pipe 50 does not occur.

On the other hand, Figures 4 to 8 are photographs of the test results photographing the situation in which the micro-bubbles in the water tank 60 by the configuration according to an embodiment of the present invention.

Referring to Figure 4, (a) as in the embodiment of the present invention, a plurality of fillers 45 are filled in the housing 41 of the mixing section 40 and the distal end 52 of the discharge conduit 50 is It is related with the state which the process object water falls to the water surface in the state installed higher than the water surface of the water tank 60.

(b) is a plurality of fillers 45 is not filled in the housing 41 of the mixing portion 40, the distal end portion 52 of the discharge pipe 50 is treated in a state that is installed higher than the water surface of the water tank 60 It relates to the state that object water falls to the surface of the water.

(c) is a state in which a plurality of fillers 45 are filled in the housing 41 of the mixing portion 40 and the distal end portion 52 of the discharge conduit 50 is installed lower than the surface of the water tank 60 and is located in the water. In this regard, the treatment water is supplied.

When (a), (b) and (c) of the photographs of the regions A1, A2, and A3 of the photographs are observed, microbubbles generated in the water in (a) according to the configuration of the present embodiment are generated most finely. As can be seen, it can be seen that the size of the bubble is increased to the (b) and (c).

The finer the bubble, the greater the contact area in water to increase the contact efficiency with contaminants.In the case of bubbles that merge with each other or expand and become larger in size, one bubble has a large contact area, Since large bubbles are generated, the contact area of the entire surface can be seen to decrease.

FIG. 5 shows the test of FIG. 4 in more detail, in which (a) and filler (b) in which the filler 45 is filled in the housing 41 of the mixing part 40 with the same conditions are different. Is showing.

It can be seen that in the region B1 of FIG. 5A, bubbles are generated finer than the region B2 in (b), and in B2, the bubbles are aggregated to show a large bubble.

On the other hand, Fig. 6 also shows the test of Fig. 4 in more detail, the same condition that the filler 45 is filled in the housing 41 of the mixing section 40, the same as the end of the discharge pipe (50) ( (A) is installed higher than the water surface of the water tank (60), and the distal end portion 52 of the discharge pipe (50) is lower than the water surface of the water tank (60) enters the water (bubbles are blocked and the water discharge pipe is Invisible) (b) shows the state of the bubble.

It can be seen that in the region C1 of FIG. 6 (a), bubbles are generated more finely than the region C2 in (b), and in C2, bubbles are agglomerated to show large bubbles.

7 (a) and (b) are photographs showing the test configuration and operation of FIGS. 6 (a) and (b) in more detail, respectively.

7 (a) shows a test configuration in which the distal end portion 52 of the discharge pipe line 50 is installed higher than the water surface of the water tank 60 as the configuration for the test of FIG. have.

In Figure 7 (b) is a configuration for the test of Figure 6 (b) is a test configuration in which the distal end portion 52 of the discharge pipe line 50 is installed lower than the water surface of the water tank 60 to enter the water Is showing.

7 (a) and (b), as described with reference to FIG. 6, it can be seen that bubbles are generated finely in the structure in which the distal end portion 52 of the discharge pipe line 50 is installed higher than the water surface of the water tank 60. In the state where the distal end portion 52 of the discharge pipe line 50 enters the water tank 60, it can be seen that bubbles are aggregated and bubbles are greatly seen.

Although the preferred embodiment of the present invention has been described above, the above embodiment is merely an embodiment within the scope of the technical idea of the present invention, and in the ordinary skill of the art, within the technical idea of the present invention. Of course, other variations are possible.

10; A plasma processing unit 11; Dielectric tube
12; Discharge electrode 13; Blocking chamber member
15; Connector 17; cover
17a; Endplate 17b; Other breaker
17c; Cooling water outlet 17d; Cooling water inlet
19; Power supply 20; Gas-liquid mixing unit
21; Inlet side 22; Neck
23; Outlet 26; Flow tube
30; 40 intermediate pipe; Mixing section
41; A housing 42; Entrance
43; Outlet 45; filler
50; Outlet line 52; Distal end
60; Tank 61; zenith
62; Space 65; waterspout
67; UV lamp

Claims (4)

A plasma processing unit 10 for discharging air by passing through the plasma region;
The air that is connected by the plasma processing unit 10 and the connection pipe 15 and discharged by plasma treatment from the plasma processing unit 10 is supplied through the connection pipe 15 to be dispersed in the form of micro bubbles in the water to be treated. Gas-liquid mixing unit 20,
A mixing unit 40 through which the treatment target water discharged from the gas-liquid mixing unit 20 flows in and passes;
It is connected to the mixing unit 40 includes a discharge pipe 50 for discharging the water to be treated in the mixing unit 40,
The mixing unit 40,
And a housing 41 through which the water to be treated passes, and a plurality of fillers 45 filled in the housing 41,
The outlet portion 43 of the housing 41 is formed to be narrower than the inlet portion 42, thereby causing an increase in pressure inside the housing 41. delete The method of claim 1,
The distal end portion 52 of the discharge pipe line 50 is installed higher than the water surface of the water tank 60, and the treated water drops from the discharge pipe line 50 to the water tank 60 to impact the water surface. Device The method of claim 3,
It includes a drain 65 for discharging the water to be treated in the water tank 60,
In the space 62 between the water surface of the water tank 60 and the ceiling 61 of the water tank 60, an air layer is formed in which the microbubbles float on the water and air is collected.
The treatment water falling to the water surface of the water tank 60 re-introduces air in the air layer below the water surface.

Images